WO1991008064A1 - Apparatus for manufacturing welded steel pipe and method of operating thereof - Google Patents
Apparatus for manufacturing welded steel pipe and method of operating thereof Download PDFInfo
- Publication number
- WO1991008064A1 WO1991008064A1 PCT/JP1990/001572 JP9001572W WO9108064A1 WO 1991008064 A1 WO1991008064 A1 WO 1991008064A1 JP 9001572 W JP9001572 W JP 9001572W WO 9108064 A1 WO9108064 A1 WO 9108064A1
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- WO
- WIPO (PCT)
- Prior art keywords
- roll
- rolls
- bend
- center
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical work; Clamping devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
- B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
Definitions
- the present invention defeats the welding steel pipe manufacturing apparatus and its handling method.
- FIGS. 11 and 12 show U.S.A.'s Kouda (Japanese Patent Application Laid-Open No. 45-29896), and FIGS. 13 to 15 show U.S. Torrance's U.S.A. (Japanese Utility Model No. 46-28897). There is.
- 100 is a preforming roll
- 102, 104, 106, and 108 are breakdown rolls
- 110 is an inner roll
- EF is an edge forming roll
- CR is a cage roll
- IF, 2F, 3F is a fin pass roll
- SQ is a squeeze roll.
- FIGS. 17 and 18 a molding apparatus (Japanese Patent Laid-Open No. 61-135428) shown in FIGS. 17 and 18 was previously developed.
- This equipment consists of an edge forming roll EF, first to fourth center bend rolls 1 CB, 2 CB, 3 CB, 4 CB and a number of cage rolls CR "* arranged on both sides of these rolls, from upstream to downstream.
- a plurality of fin pass rolls IF, 2F, 3F, and a squeeze roll SQ are arranged in order, and the edge of the strip is bent with an edge forming roll EF (Fig. 18a).
- the first to third center bend rolls 1 CB, 2 CB, 3 CB and the cage roll C R The first to third center bend rolls 1 CB, 2 CB, 3 CB and the cage roll C R.
- f 1 1st to 4th center bend rolls 1 CB, 2 CB, 3 CB, i 4 CB are bent from the boundary between the pipe side and the pipe bottom to the pipe bottom. With a width of about 1/3 at the center of the strip.
- the center bend rolls 1 CB, 2 CB, and 3 CB are arranged in the range (Fig. 18 b-d) and the first to third center bend rolls are twin-type split rolls. Therefore, even if all the center bend rolls are driven, the transmission torque from the rolls to the band is not sufficient, and the band does not proceed smoothly.
- the 2nd and 3rd center bend rolls 2CB and 3CB are twin-type split rolls (see Fig. 19 and Fig. 20. However, Fig. 19
- Fig. 15 shows the case where the pipe size is small
- Fig. 20 shows the case where the pipe size is large.
- dents and roll flaws are generated on the strip at the roll corners.
- 3 1st to 4th center bend rolls 1CB, 2CB, 3CB and 4CB are independent stand structures, so many roll exchanges are required.
- the lower roll of the 2nd and 3rd center bend rolls 2 CB, 3 CB needs to change the roll interval every time the pipe production size is changed even though there are cage rolls on both sides. take time. 5Finpass rolls IF, 2F, 3F require at least three stages, so it takes a lot of trouble and time to change rolls.
- the present invention is intended to provide an excellent welded steel pipe manufacturing apparatus and a method of handling the same by sufficiently considering these points.
- each of the molding stands consisting of several stages of the breakdown roll system and center bend roll system used in the rough and intermediate molding processes are independent from each other.
- the upper and lower rolls are incorporated into the common housing through chocks. For this reason, the roll exchange in each forming stand is performed individually by the stand horizontal pulling method or the chuck upper pulling method.
- the present invention is intended to solve such a conventional problem, and is intended to improve the operation rate.
- the raw pipe warps due to the force applied from the cage roll, and at the time of threading of the strip, the front end of the raw pipe has the next first fin pass port 1. It may not be able to enter the F smoothly, and it may be impossible to form due to deviation from the pass line. Also, even if it enters, the contact of the first fin pass roll 1F with the lower roll becomes stronger, and roll flaws are more likely to occur. Furthermore, when the width of the tube is adjusted by the left and right cage rolls, In some cases, the part may be bent and the molding may be defective.
- the present invention seeks to eliminate such conventional disadvantages and to achieve stable molding.
- JP-A-58-167025 (FIG. 34) is known for an edge bend roll which bends and forms a ⁇ portion of a strip in a forming apparatus for continuously bending a strip.
- the upper roll 36 is formed into a pair of left and right split rolls 36a and 36b fitted to one shaft, and these pair of split rolls 36a and 36b are Rolls having different radii of curvature from the surfaces facing each other, that is, the radius of curvature of the split roll surface on the inner surface, and the non-facing surfaces of the split rolls 36a and 36b, that is, the radius of curvature of the roll surface on the outer surface.
- the pair of split rolls 36a, 3b are made reversible with respect to the shaft 37 so that the inner and outer surfaces of the pair of split rolls 36a, 36b are opposite. 6b enables the use of the lower roll 1 to form a strip edge of two types of tube-forming sizes.
- the strip ⁇ forming roll of the welded mesh pipe has a strip formed between the upper and lower rolls and is passed through to form a curved portion in the strip ⁇ corresponding to the pipe forming size. Therefore, it is necessary to replace the rolls each time the pipe size changes. Therefore, the number of roll exchanges required was large, and the number of rolls required was equivalent to the number of pipes.
- An object of the present invention is to provide an edge bend roll for a welded steel pipe that solves the above-mentioned problems.
- a roll forming device in a welded steel pipe production line that continuously processes strip steel is equipped with an upper roll and a lower roll as forming rolls and bends into a so-called flower through the steel strip between the rolls. Replacing the forming rolls each time requires a large number of rolls with different dimensions, and it is not easy to replace the rolls, which results in cost reduction. In recent years, the split roll method has become the mainstream.
- This split roll system is configured by splitting the above-mentioned forming roll into two parts, that is, a split roll, and by adjusting the interval between them, the pipe-making size can be changed.
- a split roll for example, there is a type having a spiral adjusting mechanism disclosed in Japanese Patent Application Laid-Open No. 57-28627, and a type replacing a spacer between divided rolls disclosed in Japanese Patent Application Laid-Open No. 57-209722.
- the horizontal main shaft itself is a screw, and a pair of nuts are screwed into the screw, and the nut is moved to thereby move the pair of nuts movably fitted to the main shaft.
- the split rolls are moved in the axial direction to adjust the distance between the split rolls.Therefore, if a load is applied to the split rolls, the main shaft may be damaged due to the stress in the thread. It is great. Furthermore, since there is no backlash adjusting mechanism, it is unsuitable especially for thin-pipe construction requiring high precision.
- the latter adjusting means includes a spacer interposed between a pair of left and right split rolls, and replaces the spacer with one having a different size as necessary. Remove, split from the spindle The rolls and baser must be removed, the baser changed to a different size, reassembled, and assembled into the device, requiring considerable time and labor.
- the present invention is intended to solve such a conventional problem, and is intended to stabilize the quality of a product.
- the upper roll for nipping and moving the plate between the lower roll and gradually deforming it into a tubular shape has the roll surface of the upper roll coincident with a pass line of a band plate having a different wall thickness.
- the upper roll operating device usually raises the screw shaft from the chocks on both ends of the upper roll fitting shaft, and stands these screw shafts.
- the upper roll can be moved up and down by rotating the worm shaft in both forward and reverse directions.
- the removal of the backlash of the apparatus is performed by providing a special hydraulic jack between the chucks at both ends of the lower roll fitting shaft and the chuck of the upper roll fitting shaft.
- the present invention has been made to eliminate such drawbacks and to appropriately remove the backlash.
- cage roll forming of ERW steel pipes is usually performed as shown in Fig. 47, A molding device as shown in FIG. 48 is used.
- This device SS multiple inner rolls 110 with decreasing roll width from upstream to downstream, and forms a large number of outer rolls, that is, cage rolls C only..., CR '"on both sides. These rolls are arranged at a height and direction that suits the situation, and the rolls are used to apply a force from inside and outside to the fed strip, to make the strip U-shaped and circular. Gradually bend.
- the roll surface has a flat surface (for example, Japanese Utility Model Publication No. Sho 62-19371 and Japanese Patent Application Laid-Open No. 60-174216),
- JP-A-59-202122 JP-A-59-202122
- the roll contact portion of the formed steel pipe is flattened in a streak shape, which significantly impairs the appearance and lowers the commercial value, which is particularly serious in the latter case.
- the present invention seeks to eliminate such conventional disadvantages.
- the present invention according to claim 1 is an apparatus for manufacturing a welded steel pipe in which a strip is continuously roll-formed to form a raw pipe and welded butted joints are welded, from upstream to downstream in a roll-forming process.
- an edge bend roll that bends from the pipe edge to the boundary with the pipe side and bends it down
- a first center bend roll that presses down and restrains the pipe side to bend
- the second to fourth center bend rolls which restrain the lower part of the roll while applying lateral pressure to the pipe from both sides to bend the boundary to the bottom of the pipe, and a plurality of SBs arranged on both sides of these rolls Cage rolls and first and second fin pass rolls for further reducing and forming the raw tube are sequentially arranged and driven by at least the edge bend roll, first center bend roll, first and second fin pass rolls Take the measures, and put all the upper rolls of the 1st to 4th center bend rolls in one housing, all the lower roll stands of the 1s
- the upper and lower rolls of the edge bend roll and the first center bend roll are both divided rolls whose width can be adjusted,
- the upper and lower rolls of the second and third center bend rolls are divided into calibre-shaped integral rolls that fit the maximum pipe diameter in the common range that also serves as the lower rolls of the second to fourth center bend rolls.
- the roll is an integral roll that can also serve as the upper roll of the fourth bend roll, and the cage roll is equipped so that it can move forward and backward diagonally.
- the method for handling a welded steel pipe manufacturing apparatus is characterized in that the first to fourth center bend rolls are sequentially arranged in an intermediate step of roll forming, and all upper rolls of these center bend rolls are arranged in one housing.
- all the upper rolls of the first to fourth center bend rolls are exchanged at once by replacing the housing. It is designed to be exchanged.
- the method for handling the welded steel pipe manufacturing apparatus is characterized in that one or more lower roll stands of the first to fourth sensor / bend rolls or all lower roll stands of the second to fourth sensor / head rolls are detachable. It is set to a common sub-base plate and all lower rolls of the first to fourth center bend rolls are exchanged at once with the common sub-base plate.
- edge bend roll may or may not drive the upper roll, and the second to fourth center bend rolls may drive only the lower rolls.
- a band plate having a predetermined size may be fed from the upstream side to the downstream side.
- the edge bend roll is used to bend from the shell edge to the boundary between the shell and the side of the shell and bend.
- the bending here should be in a state almost equal to the final formed arc.
- the 4th center bend roll restrains the bottom of the pipe from rolling down.
- a plurality of cage rolls arranged on both sides apply side pressure to both sides of the tube, and the bottom of the tube is bent. Bending here is equivalent to moderately good as the final formed arc.
- the first and second fin pass rolls are further rolled down to form the base tube (obtained into an oval cross section by bending to IV. Above), and the base tube side is protruded to the side. At the same time, the above-mentioned boundaries and the edges of the shell are appropriately bent and bent back to make the shell close to a circle ⁇
- the apparatus for manufacturing a welded steel pipe according to the first aspect, wherein the first to fourth center bend rolls each include an upper roll mounted on a common stand frame of the upper roll. And lower roll common Each lower roll mounted on the stand frame can be raised and lowered independently.
- a positioning means and a clamping means are provided on the upper roll common stand frame of the first to fourth center bend rolls.
- the clamp means is released to disengage the common stand frame, and then a new common stand frame is inserted, and the positioning means and the clamp means are set to a fixed position. It is.
- a seventh aspect of the present invention there is provided a method of handling a welded pipe forming apparatus according to the fourth aspect, wherein the lower rolls of the first to fourth center bend rolls are provided.
- a positioning means and a clamping means are provided, and when exchanging rolls, the clamping means is released to disengage the common stand frame, and then a new common stand frame is inserted, and the positioning means and the clamping means are inserted. It is designed to work and set in place.
- the present invention described in claim 8 is a welding steel pipe manufacturing apparatus according to claim 1, wherein the bottom of the base tube received by the raw pipe is provided in a section of the rush between the fourth center bend roll and the first fin pass roll. Guide rolls are provided.
- the bottom guide roll since the bottom guide roll is configured as described above, the bottom guide roll receives the bottom portion of the base tube at the final stage of cage roll forming, and prevents the base tube from warping downward. To maintain the correct pass line and guide the passenger correctly to the next fin pass roll.
- the present invention according to claim 9 is an edge bend roll used in the apparatus for manufacturing a welded steel pipe according to claim 1, wherein the lower roll and the upper roll are each a pair of symmetrical split rolls, and the lower roll is A stepped roll in which the inside has a plurality of steps with a small diameter and a plurality of steps having different outside diameters, and a portion corresponding to the strip ⁇ portion of each step is provided with a concave curved portion having a different curvature radius, and the upper roll is an outer peripheral profile.
- the upper roll In the plane containing the roll center axis Only the outer surface side of the roll has a convex curved shape, the upper roll is made to bear on a holder, and the installation position can be changed to a position corresponding to each step of the stepped roll.
- the curved shape is a fan-shaped connecting type having different radii of curvature, and the upper roll holder has a function of tilting the upper roll in the radial direction of the plate.
- the tilting center of the upper roll is set on a normal line set to an end of the convex curved surface of the upper roll. Things.
- the present invention according to claim 11 is the upper roll supporting device of the edge bend roll according to claim 9, wherein the lifting frame is supported by the housing so as to be movable up and down, and the lifting frame is movable to be movable in the radial direction of the upper roll.
- An upper roll support frame supported by the upper roll support frame, an upper roll holder supported to be tiltable to the upper roll support frame, and an upper roll holder provided between the upper roll support frame and the upper roll holder.
- the lower rolls 1a, lb and the upper rolls 36a, 36b can be adjusted between the upper and lower rolls according to the width of the strip 4, respectively.
- the lower roll and the upper roll can be adjusted vertically in order to match the roll surface height with the pass line height.
- the lower roll has a plurality of different outer diameters with a small diameter on the inside, and a step with a concave curved portion with a different radius of curvature at the corresponding edge of the strip at each step. Rolls can be used for many types of strips.
- the shape of the upper roll in the plane including the roll center axis of the outer peripheral profile is such that only the outer surface side of the upper roll has a convex curved shape and the inner surface side is omitted, so that the roll thickness is reduced and the roll holding body is thinned. It can be thick and rigid.
- the upper roll is made to bear on this holder, and the upper roll is removed from the bearing corresponding to each caliber stage of the step roll so that it can be replaced, so that belts of various outer diameters and plate thicknesses can be obtained. Can be adapted to the board.
- the convex curved portion of the upper roll has a shape of a fan-shaped connection with different radii of curvature, while the roll surface of the upper roll tilts in the direction indicated by the angle ⁇ in the radial direction of the strip as shown in FIG. 30. Exercise.
- the present invention according to claim 12 is a drive forming roll adjusting device used in the apparatus for manufacturing a welded steel pipe according to claim 1, comprising a lower roll of an edge bend roll, a vertical roll of a first center bend roll, and the like.
- the structure of the driven forming roll is such that a pair of left and right cylindrical roll holders are slidably fitted in the axial direction on the outer periphery of the hollow main shaft that is supported on both sides, and is stopped at an arbitrary position. Take measures to maintain A pair of left and right split forming rolls are fixed to the inner end of the main holder, and a gear for mechanically linking the main shaft to a driving device is fixed to one end of the main shaft.
- the adjusting shaft is rotatably penetrated, and the adjusting shaft is provided with a pair of screw portions having different screw directions at both ends, and a screw is linked to each of the two screw portions so as to be able to advance and retreat.
- a transmission mechanism for transmitting the screw advance / retreat between one screw and one roll holder and between the other screw and the other roll holder is provided, and a rotation handle is provided at an appropriate position on the adjustment shaft. It was made.
- the position holding means is released to enable the roll holder to slide, and if the knob and the handle are rotated clockwise or counterclockwise, The adjusting shaft is driven by this, the screws on both sides advance and retreat in opposite directions, and the two roll holders follow this via the transmission mechanism, and the split forming rolls approach or separate.
- the position holding means is operated again to restrict the positions of the two roll holders and hence the positions of the split forming rolls.
- a rotational force is supplied from the drive unit to the divided forming rolls after the adjustment, and the rotating force is transmitted to the gears and transmitted to the divided forming rolls via the main shaft and both holders.
- the present invention according to claim 13 is an adjustment device for a non-drive forming roll used in the apparatus for manufacturing a welded steel pipe according to claim 1, wherein the upper and lower rolls of the second to third center bend rolls are provided.
- the structure of the non-driving forming roll is such that the left and right portions of the main shaft formed by rotatably fitting the outer cylinder shaft to the outer surface of the core shaft are fixed to the support plate, and the intermediate shaft portion is slid in the axial direction.
- a pair of left and right sliding sleeves with a positioning mechanism are fitted to the outer surface of the sleeve, and a pair of left and right split rolls are rotatably fitted to the outer surface of the sleeve, and the two ends are opposite to each other from both ends of the core shaft.
- the screw shafts forming the screws are respectively protruded, and the nut screwed to these screw shafts and the sliding sleeve are connected by a rod, and a core shaft rotating means is provided at the end of the screw shaft. Things.
- both ends of the support plates 510 and 510 are formed.
- the core shaft 502 rotates with respect to the outer cylinder shaft 53 fixedly supported.
- the sliding sleeves 5 15 and 5 15 and the rod 5 3 0 and 5 which do not rotate with respect to the outer cylinder shaft are rotated.
- the nuts 505, 505 connected by 530 are in the direction of the support plates 5100, 510 because the screw shafts 504, 504 form opposite threads!
- the sliding sleeves 5 15 and 5 15 are pushed by the rods 5 3 0 and 5 3 0 and move together with the separating rolls 5 2 0 and 5 2 0 in a direction approaching each other.
- the nut retreats and the split roll separates.
- the positioning mechanism By operating the positioning mechanism at a position corresponding to the width of the strip formed into a tubular shape, the outer cylinder shaft 503 and the sliding sleeve are fixed, and the strip between the upper and lower split rolls is fixed at that position.
- the plate When the sheet is held, the plate is deformed into a tubular shape by the progress of the strip.
- the present invention according to claim 14 is an apparatus for removing a backlash in an upper roll operating device such as an edge bend roll, a center bend roll, and a compass roll used in the apparatus for manufacturing a welded steel pipe according to claim 1.
- the screws are respectively erected from the second chucks supporting both ends of the upper roll fitting shaft, and these screw shafts are incorporated into worm jacks on both left and right sides of the worm shaft supported by the stand, and
- An upper roll actuating device is provided which allows the upper roll to move up and down via the screw shaft by rotation in both forward and reverse directions, and a hydraulic cylinder is provided above each of the screw shafts.
- the upper roll is connected to the upper end of the screw shaft so that it can be pulled up.
- the vertical movement of the upper roll 605 is performed by the forward and reverse rotation of the worm shaft 613 by the reversible motor 616.
- the screw shafts 608 and 608 are lowered by the operation of the worm jacks 614 and 614, and the upper roll 605 is lowered, and the worm shaft in the opposite direction. Due to the rotation, the worm jack operates in the opposite direction, and the upper roll rises via a screw shaft or the like.
- the backlash of the worm jack is removed by pulling up the screw shafts 608 and 608 by operating the hydraulic cylinders 617 and 617.
- the pulling force of the fluid pressure cylinder is a pulling portion, that is, in the embodiment of FIG. 43, the screw shaft 608, the second chick 600, the upper roll fitting shaft 606, the upper roll 605, etc.
- the size should be equal to the sum of the own weight and 10% to 20% of the strip forming load.
- (E) Cage roll The present invention according to claim 15 is a cage roll used in the apparatus for manufacturing a welded steel pipe according to claim 1, wherein the roll surface has a concave surface having a radius of curvature larger than the radius of curvature of the molded flower at the corresponding position. It is formed on a curved surface.
- the roll surface of the concave curved surface is pressure-formed so as to wrap the band to be bent, that is, the convex surface of the molded flower is properly formed. It does not fit and does not flatten the contact area.
- FIG. 1 is an explanatory view showing the configuration of an apparatus for manufacturing a welded steel pipe according to the present invention
- FIGS. 2 to 11 show an embodiment of the present invention
- FIG. 2 is a side view of the apparatus in a roll forming process.
- Fig. 3 is a front view of the No. 1 center bend roll
- Fig. 4 is a front view of the No. 3 center bend roll
- Fig. 5 is a front view of the No. 4 center bend roll
- Fig. 6 is a plan view of the cage roll.
- Fig. 7 is an enlarged front view of the main part of No. 1 center bend roll '.
- Fig. 8 and Fig. 9 are the main bend rolls of the 2nd to 4th centimeter bend rolls for small and large pipe sizes.
- FIG. 10 is a graph
- Figs. 11 to 20 show conventional examples
- Fig. 11 is a plan view of the configuration of the first conventional example
- Figs. Fig. 13 is a perspective view of the second conventional example
- Fig. 14 is a cross-sectional view taken along the line XIV-XIV
- Fig. 14 is a cross-sectional view taken along the line XIV-XIV
- Fig. 15 is a line XV-XV.
- Cross section of FIG. 16 is an explanatory view of a main part of the first conventional example and the second conventional example
- FIG. 17 is a plan view of the configuration of the third conventional example
- FIG. 17 Figure a-a line, b-b line,...
- FIG. 19 is a front view of the bottom guide roll
- Fig. 22 is a side view
- Fig. 23 is a plan view
- Fig. 24 is a rear view of the main part
- Fig. 25 The figure is a plan view of the main part
- Fig. 26 is an enlarged side view of the main part
- FIG. 27 is an enlarged rear view of the main part of Fig. 28.
- Fig. 28 is a front view of a method of forming the strips and forming rolls of the present invention in different forming sizes
- Fig. 29 is a thick material.
- FIG. 30 is an explanatory view showing the setting state of the upper and lower rolls in forming
- FIG. 30 is an explanatory view showing the setting state of the upper roll inclination in forming the thin material
- FIG. 31 is a front view of an apparatus showing an embodiment of the present invention.
- Fig. 32 is a cross-sectional view showing the upper roll assembly part of the device shown in Fig. 31.
- Fig. 33 is a graph showing a comparison of the bending curvature of the strip edge.
- Fig. 34 is one of the conventional forming methods.
- Fig. 35 is a cutaway front view
- Fig. 36 is a side view
- Fig. 37 is a cutaway plan view of line A-A in Fig. 37
- Fig. 38 is Fig. 36B -Half cut plan view of line B
- Fig. 39 is a side view of the main part,
- FIG. 40 is a fragmentary plan view taken along the line C-C of FIG. 35
- FIG. 41 is a plan view of the device of the present invention
- FIG. 42 is a cross-sectional view as viewed from the front
- FIG. FIG. 44 is an enlarged front view of the main part of FIG. 1, showing cutaway parts
- FIG. 45 and FIG. 46 are action explanatory views
- FIG. Fig. 52 is a conventional example
- Fig. 47 is a plan view of the configuration of the molding apparatus
- Fig. 48 is a cross-sectional view taken along the line VI-VI in Fig. 47
- 1 to 9 show an apparatus according to the present invention.
- this device moves from the upstream to the downstream Bend roll EB, 1st to 4th center bend rolls 1 CB, 2 CB, 3 CB, 4 CB, a plurality of cage rolls CR 'arranged on both sides from the 2nd center bend roll to the downstream of the 4 th center bend roll ", 1st and 2nd fin pass rolls 1F and 2F, rotary seam guide roll RSG, high frequency welding machine HFW and squeeze roll SQ are arranged in order.
- edge bend roll EB edge bend roll EB, first to fourth center bend rolls 1 CB, 2 CB, 3 CB, 4 CB, first and
- the second fin pass rolls 1F and 2F are composed of an upper roll U and a lower roll D, and a plurality of cage rolls CR '"and a squeeze roll SQ are paired with a left roll and a right roll.
- the first to fourth center bend rolls 1 CB, 2 CB, 3 CB, and 4 CB have a certain shared range, for example, a steel pipe having an outer diameter of 22.22 mm to 60.5 M.
- Figure 10 for example, as shown in Figure 10,
- the side rolls SD are arranged between the first and second fin pass rolls, they may not be provided.
- edge bend roll EB lower roll 0, first center bend roll 1 CB, lower roll U, D, first and second fin pass rolls 1F, 2? * Lower roll 11, D Employs 27 driving means.
- the roll shaft is mechanically connected to a drive source via a universal joint. If necessary, edge bend roll EB upper roll U, 2nd to 4th center bend rolls 2 CB, 3 CB, 4CB lower roll D, squeeze roll SQ can be driven. .
- the edge bend roll EB is divided into upper and lower rolls so that the width can be adjusted according to the size of the pipe.
- the belt is constrained from the edge of the strip to the border with the side of the pipe. Then, at the same time as feeding the band plate, the edge portion to the boundary portion of the tube are bent almost in the same manner as the final molding arc in anticipation of springback.
- the first center bend roll 1 CB is composed of a lower roll D composed of left and right members 12 and 13 having a relatively wide width and a center member 11 having a relatively narrow radiation.
- the body split roll and the upper roll U are divided into left and right members 14, 15 as two separate rolls, each of which has width adjusting means 22, 22 so that the width can be adjusted according to the pipe size.
- the steel pipe side of the strip is restrained under pressure, and the strip is fed and simultaneously slightly bent.
- the degree of bending here is such that the caliber radius at the midpoint in the range of pipe size (outer diameter) that can be used for this roll is about 2.5 times the caliber radius of the squeeze roll SQ that fits this. Degree is fine.
- the second to fourth center bend rolls 2 CB, 3CB, and 4CB are formed as lower rolls 0. These integrated rolls are used for a certain range of pipe size. 3131.03ani, 2 31.03 Bm ⁇ 43.33mm, 3 43.33M ⁇ 60.5, three integrated rolls for 1 to 3 are prepared, and for one roll, 31.03am
- the caliber shape conforms to (2), the single roll for (2) has a caliber shape conforming to 43.33ml !, and the integral roll for (3) has a caliber shape of 60.5na. In other words, it is formed into a force river shape that fits the maximum outer diameter of the common range that can also be used.
- the second and third center bend rolls 2 CB and 3 CB are respectively composed of the upper roll U and the right and left two members 17 and 18, respectively.
- the width of the body split roll can be adjusted arbitrarily according to the size of the pipe. (Fig. 8 shows the case where the pipe size is small, and Fig. 9 shows the case where the pipe size is large.)
- the upper roll U is an integral roll 28 as shown in FIG.
- the second and third center bend rolls 2 CB and 3 CB restrain the boundary between the raw tube side portion of the band plate and the raw tube bottom portion
- the fourth center bend roll 4 CB is The pipe bottom is constrained under pressure, and a plurality of cage rolls CR "', CR,” arranged on both sides of these rolls, and the boundary of the raw pipe is more conductive than the bending of the final formed arc. Then, the tube bottom is bent to the same degree as the final formed circular arc.
- the cage rolls CR "', CR ... are from the upstream position of the second center bend roll 2 CB to the downstream position of the fourth center bend roll 4 CB, as shown in Fig. 2, Fig. 4 to Fig. 6.
- the first and second fin pass rolls 1F and 2F have an upper roll with fins and a lower roll without fins, and the first fin pass roll 1F has an oval cross section in the previous process.
- the raw pipe is pressed down, and the boundary between the raw pipe edge and the raw pipe side and the boundary between the raw pipe side and the raw pipe bottom are further excessively bent, and the raw pipe edge is moderately bent.
- the second fin pass roll 2F then continuously forms the raw tube under pressure, extrudes the raw tube side part outward, and bends it to almost the same as the final formed circular arc. Bend each boundary to near the final forming arc.
- ROSE Sea Seam Guide Roll RSG has a finned upper roll and a finless lower roll, and the position and angle of the rolls can be adjusted, so that the raw tube is prepared for regular welding.
- the high-frequency welding machine H F W is a kind of resistance welding machine, in which a welding current is applied to the joints of the pipes, and the welds are heated and melted.
- the squeeze roll SQ (Fig. 1) is equipped with a pair of left and right rolls, presses the raw pipe from both sides, absets and joins the melted seam, and shapes the bonded pipe into a circular shape.
- edge bend roll EB the first and second fin pass rolls IF, 2F, the rotary seam guide roll RS C.
- D * " Independent roll stands 1 9 ⁇ are equipped with replaceable rolls.
- Squeeze roll SQ is equipped with left and right rolls on roll stand 20 so that rolls can be replaced.
- the first to fourth center bend rolls 1 CB, 2 CB, 3 CB and 4 CB are independent roll stands 2 1.
- the second to fourth center bend roll stands 2 1 are fixed to one common sub-base plate 50 so that the common sub-base plate can be exchanged at a time.
- the upper roll ⁇ is also exchangeable with one detachable housing 23 common to all four members, so the upper and lower rolls ⁇ ,, ⁇ By exchanging the base plate 50, all four persons and all three persons can be exchanged at once.
- the cage roll CR "'has three zones in one zone each equipped with one roll stand 24.
- Three common diagonal advance / retreat adjusting means 25 are used. The adjustment in this case may be performed centering on the middle roll.
- the cage roll can be used for all pipe sizes by this adjusting means. It is sufficient to set the angle appropriately in advance corresponding to the position.
- the edge bend rolls extend from the edge of the pipe to the boundary with the pipe side, the first center bend roll covers the pipe side, and the second to fourth center bend rolls and a large number on both sides.
- Cage roll Since the boundary between the raw pipe side and the raw pipe bottom and the raw pipe side are bent sequentially, the raw pipe can be formed into an oval cross section before it reaches the fin pass roll. Since the tube side is protruded to the side by rolling down with rolls, it can be bent accurately without becoming polygonal. In addition, the load in the fin bath forming is reduced, so that two fin bath rolls are sufficient, and the number of rolls can be reduced throughout, and the entire apparatus can be made compact.
- the edge bend roll is used to define the boundary from the pipe edge to the pipe side, the first center bend roll is used for the pipe side, and the second to fourth center bend rolls are used for the pipe side and pipe bottom. Since the boundary between the pipe and the pipe bottom is restrained, and the pipe edge and pipe side are restrained by cage rolls, the strip is sufficiently restrained in almost the entire area in the radiation direction. It is possible to stabilize the molding and to improve the quality, without causing any misalignment and rolling, as well as no edge wave.
- An edge head roll that restrains the pipe edge to the adjacent boundary, a first center bend roll that restrains the pipe side, and first and second fin pass rolls that restrain the top and bottom of the pipe.
- the strip receives torque transmission over a wide range in the radiating direction, and can proceed smoothly.
- the second to fourth center bend rolls since the upper roll is not driven, the size of the device can be reduced, the space for installing the cage roll can be secured without any trouble, and the equipment cost can be reduced.
- the lower rolls of the 2nd to 4th center bend rolls can also be used
- the roll is a caliber-shaped integral roll that fits the maximum pipe diameter in the common range, so it is possible to eliminate dents and roll flaws caused by roll corners, and if the steel pipe size is within a certain range. For example, it is not necessary to adjust the roll interval when changing the pipe production size, and the work and time required for the roll adjustment are not required.
- the cage roll is equipped so that it can be adjusted obliquely forward and backward, so it can be used for all pipe sizes, and of course only one adjustment is required, making it easy and quick. Also, the structure can be simplified.
- the first to fourth center bend rolls 1 CB, 2 CB, 3 CB, and 4 CB have upper rolls and lower rolls D ′′ * facing each other.
- the roll D '"and the upper rolls U are mounted on the lower roll common stand frame 202 and the upper roll common stand frame 203 arranged on the master plate 201, respectively.
- the upper roll U and the lower roll D of the first center bend roll 1 CB are drive rolls connected to the rotator, and all other rolls are non-drive rolls.
- the lower roll common stand frame 202 is a pair of left and right pairs on both sides of a grooved frame 221, which is long in the line direction.
- a pair 2222, 2222, 2223, 2223 ⁇ are sequentially arranged, and these chicks are supported by the lower rolls of the first to fourth center bend rolls 1 CB, 2 CB, 3 CB, 4 C ′.
- Hydraulic jacks 224, 224,... are arranged below the chucks 223, 223,... For supporting the lower rolls of the second to fourth center bend rolls 2CB, 3CB, 4CB.
- Rolls I) ... can be height-adjusted.
- the lower roll common stand frame 202 is disposed on the base plate 201 in a detachable manner, and is positioned at a fixed position by the positioning means 204 and the clamping means 205.
- the positioning means 204 is provided with two pairs of radiating hardware 241, 241, 242, 242 corresponding to the front part and the rear part on both sides of the lower roll common stand frame 202, and abutting corresponding to the rear end.
- Hardware 243 is arranged and fixed on the base plate 201, respectively, and a hydraulic cylinder 244 for pressing the lower roll common stand frame 202 rearward corresponding to the front part is arranged and fixed on the base plate.
- the lower roll common stand frame 202 is inserted into the receiving hardware 241, 241, 242, 242 zono and the hydraulic cylinder 244 is actuated to press against the butting hardware 243 so as to perform positioning. ing.
- the clamping means 205 is provided with semicircular engaging projections 251 on the front and rear sides of both sides of the lower roll common stand frame 202. Hydraulic clamps 252 are arranged in correspondence with these. The hydraulic clamps 252... Are hydraulically engaged with the respective engaging projections 251. Reference numerals 206... Are suspension rings provided at the front and rear of the lower roll common stand frame 202.
- the upper roll common stand frame 203 has front and rear circular legs 231 and 232 fixed to the base plate 201, respectively, and a horizontal frame 233 is removably mounted on the legs, and is mounted on the horizontal frame.
- the first to fourth center bend rolls 1 CB, 2 CB, 3CB, 4CB Upper rolls ⁇ are mounted to be able to move up and down freely.
- Each upper roll ⁇ ⁇ is supported by a lifting frame 235, which is respectively raised and lowered by a worm jack 234, and these lifting frames are arranged vertically and in pairs on a horizontal frame 233.
- Each slide guide 236 is slidably engaged with the slide guide.
- the upper roll U on the first center bend roll 1 C ⁇ is the drive roll, and the load applied to the lifting frame 235 is large.
- Each of the upper rolls ⁇ is arranged on one horizontal frame 233, and these worm jacks 234 are driven by fast-reversing motors 237.
- the horizontal frame 233 has one hydraulic cylinder 238 corresponding to the lifting frame 235 of the first center bend roll 1 C ⁇ , and two air cylinders corresponding to the other lifting frames 235. 239 are arranged respectively, and a force is applied upward to the lifting frame to eliminate the play of the worm jack 234.
- Positioning means 207 and clamping means 208 are provided between the legs 231 and 232 and the horizontal frame 233.
- the positioning means 207 is provided with abutment hardware 271 '... At the right ends of the upper surfaces of the front and rear legs 231 and 232, and at the rear left and right of the upper surface of the rear II body 232, respectively.
- Each of these hydraulic cylinders is used to set the horizontal frame 233 at a fixed position by abutting the horizontal frame 233 against abutment hardware 271.
- Clamping means 208 is equipped with fastening bolts 281 ... on the front left and right sides of the upper surface of the front and rear legs 231 and 232, respectively, and tightens and fixes the horizontal frame 233 set in place. It has become.
- the first to fourth center bend rolls 1 CB, 2 CB, 3 CB, and 4 CB may be replaced by the following procedure.
- each worm jack 234 is operated by the deceleration reversing motor 237 to adjust the height of each lifting frame 235 and therefore each upper roll ⁇ , and at the same time, the hydraulic cylinder 238 Use air cylinders 239 to eliminate play.
- the adjustment of the present invention can be preset offline.
- mounting accuracy can be improved, adjustment can be performed easily and accurately, and product quality can be improved.
- a bottom guide roll stand 60 is arranged between the two.
- the left and right cage roll stands 24, 24 each have three cage rolls CR "* arranged above the stand body placed on the base plate.
- the bottom guide roll stand 60 constitutes a stand body between the stand bodies of the cage rolls 24, 24 on the left and right, and two bottom guide rolls B GR '"are formed along the line above the plate. (See Fig. 6), and these bottom guide rolls are respectively supported by a pair of bearings provided on the deck.
- the lower rolls la and lb divided into two parts on the left and right sides are fitted to the outer surface of the shaft 2 so that the lower roll interval 7 can be adjusted.
- the left and right divided lower rolls 1 a and 1 b are two-stage large and small step rolls with a small outer diameter on the inner surface and a larger outer diameter on the outer surface.
- Concave surfaces 3a and 3b having different radii of curvature RB-1 and RB-2, respectively, are provided around the portion corresponding to the edge of.
- RB-1 is for small diameter size
- RB-2 is for large diameter size.
- the plate 4 is formed with a fixed pass line length. However, since each step of the lower roll has a different outer diameter, the roll surface of each step matches the height of the pass line.
- the shaft 2 is provided so that the height can be adjusted so that it can be adjusted.
- the roll surface speed is kept constant irrespective of the difference in outer diameter of each step. A transmission is installed.
- the upper roll is also divided into left and right upper rolls 36a and 36b, and each roll is configured to be supported by roll holders 16a and 16b (see Fig. 31).
- This roll holder can also be adjusted easily.
- the upper roll 36a is tilted to the position 36d indicated by the dotted line and the upper roll 36b is tilted to the position 36d indicated by the dotted line.
- the plate 4 is tilted in the radial direction via the upper roll holder to change the working surface of the roll surface of the upper roll as shown in FIG. 30, that is, the inclination of the upper roll can be set. It is now.
- the convex curved surface portion of the upper roll has a radius of curvature RU-1 used for forming thin (thin plate) material, as shown in Figs. Thickness (large plate thickness)
- the radius of curvature RU-2 used for material forming is formed in two adjacent sectors, and the roll surface with a radius of curvature RU-1 is used for minimum to intermediate plate thickness, RU-2 It is preferable to make the roll surface portion of each of the intermediate plate thickness to the roll surface portion for the maximum thickness.
- the upper roll 36 is tilted by a tilting mechanism to use a surface portion of a curvature radius RU-11.
- the center of tilt of the upper roll 36 is set on the normal line (for example, on the one-dot chain line in FIG. 29) established at the end of the convex curved surface of the upper roll 36.
- the setting of the upper roll 36 becomes easy, and the change in the gap between the upper and lower rolls can be reduced even when the upper roll 36 is tilted.
- the upper roll 36 is set up vertically and the surface portion with a radius of curvature RU-2 is used. It is also possible to use the upper roll with an inclination angle ⁇ that is within a settable range for intermediate thick materials.
- the upper roll For the upper roll, remove the upper roll from the roll holder and replace the roll when using the RB-1 side for the small diameter and the RB-2 side for the large diameter of the stepped lower roll. Therefore, the upper roll is provided with a small-diameter size from the minimum outer diameter to the intermediate outer diameter and a large-diameter size from the intermediate outer diameter to the maximum outer diameter.
- the edge bend roll ⁇ ⁇ can be used for: 1 22.22mm to 31.03mm, ⁇ 31.03mm to 43.33mnin, and 3 43.33am.
- the range is 60.5 mm
- the upper and lower rolls are provided with three sets of rolls (1), (2) and (3).
- the lower roll corresponding to 1 is RB1 of 22.22BID ⁇ 26.63mm, RB2 of 26.64mm ⁇ 31.03mai, and the lower roll corresponding to 2 is 31 ⁇ 04 ⁇ !
- the lower roll corresponding to RB1 of ⁇ 37.18mm, RB2 of 37.19mm ⁇ 43.33mm, ⁇ has RB2 of 13 ⁇ 481 of 43.341 »111 ⁇ 51.9201111, RB2 of 51.93mm ⁇ 60.5IM.
- a space adjusting function is provided between the lower roll and the upper roll.
- the lower rolls l a and l b and the upper rolls 36 a and 36 b are inserted into, for example, an apparatus shown in FIG. Both ends of the lower roll shaft 2 are supported by a lower roll bearing 50.
- the housing 40 supports a beam 6 as an elevating frame which is raised and lowered by a worm jack 42 driven by a reduction motor 41.
- the beam 6 is pressed by the air cylinder 43 in the same direction as the forming reaction force.
- a slide rail 5 is installed above and below the lower rolls la and 1b in a direction perpendicular to the traveling direction of the strip 4.
- These slide rails are fixed to a beam 6 as an elevating frame supported on both left and right ends by a housing 40 and a housing 40.
- the beam 6 can move up and down with respect to the housing 40 so that the gap for holding the strip between the lower roll and an upper roll described later can be adjusted.
- a pair of right and left apparatus main bodies 10a and 10b are mounted on the slide rail 5 .
- the main bodies 10a and 10b of the apparatus are slidably mounted on the slide rail 5 and the upper roll support frame 14 is fixed to the slide 6 at a fixed distance from the middle part of the beam 6 in the front-rear direction. Hang it between the rail and the beam.
- screw portions were provided at the left and right ends of the upper roll support frame 14, and shafts 13 having screw threads fitted to the screw portions of the upper roll support frame 14 were provided at the left and right ends between both beams. Bearings are provided on the fixed plate.
- the shaft 13 is connected to a reversible motor 15 fixed to a fixed plate portion, so that the movement of the upper roll in the width direction can be adjusted.
- the upper roll support frame has shafts 22 and 26 provided in parallel to the traveling direction of the strip, and the upper roll holder 16 is also provided with a similar shaft 24. Attach a warm jack 28 to provide a rotation function and an AC reversible motor 33 to drive it. The linear movement of the worm jack is supported by the three axes, 22, 24, and 26, so that the upper roll holder 16 and the upper Change the rotational motion of le 36.
- an air cylinder 30 is provided between the upper roll holder 16 and the upper roll support frame 14 so as to eliminate backlash existing in the upper roll and the upper roll holder.
- the upper roll support device of the edge bend roll EB shown in FIG. 31 includes a beam 6 as a lifting frame supported by the housing 40 so as to be able to move up and down, and a beam 6 that can move in the width direction of the upper roll.
- the upper roll support frame 14 supported on the upper roll support frame 14, the upper roll holder 16 supported on the upper roll support frame 14 in a tiltable manner, and the upper roll servo frame 14 and the upper roll holder 16 A worm jack 28 provided between them to tilt the upper roll holder 16, an air cylinder 43 for pressing the beam 6 in the forming reaction direction, and pressing the upper roll holder 16 in the forming reaction direction And an air cylinder 30.
- FIG. 32 shows an assembly of the upper roll 36 and the upper roll holder 16.
- the upper roll of the embodiment has a structure as shown in FIG. 32 and is incorporated in the upper roll holder 16. To replace the roll, remove the fastening nuts 38, 39 on the outer surface and remove the roll shaft 3. 4 is removed and the roll shaft 34 is removed from the upper roll 36.
- a pair of upper and lower strip edge forming rolls is provided as a pair of left and right divided rolls, and the upper and lower rolls are provided with a plurality of roll surface portions each having a different radius of curvature.
- a set of rows Regardless of the roll size it is possible to form the edges of multiple strips with different tube sizes, so that the number of rolls can be reduced and the number of pole replacements can be reduced. it can.
- the roll surface of the upper roll is divided into two or more different radii of curvature, and each of these portions is effectively used.
- the outer peripheral surface of the upper roll can be effectively used without waste as a plurality of upper roll surface portions.
- the upper roll has only one roll surface and the thickness of the upper roll holder frame can be increased, so that the rigidity of the holder and the mechanism for reversing the upper roll holder are improved.
- Roll setting of the upper roll by canceling, increasing the mill rigidity of the entire upper roll, making the fulcrum of rotation of the upper roll as close to the rolling point of the roll as possible, and eliminating backlash
- the precision and efficiency of milling have been significantly improved, and the molding accuracy and efficiency of the strip ⁇ have been greatly improved.
- (C-1) Drive split forming roll adjustment device such as lower roll of edge bend roll and upper and lower roll of 1st center bend roll
- 35 to 40 show a tart-type center bend roll according to the present invention.
- UR is the upper roll
- DR is the lower roll
- 301 is a hollow main shaft supported on both sides by supporting frames 302a, 302b, and 303a, 303b is a pair of left and right cylindrical members slidably fitted in the axial direction on the outer periphery of the intermediate portion of the main shaft.
- the roll holders 304a and 304b are located at arbitrary positions provided on the row I folder.
- the holding means, 305a and 305b, are a pair of left and right split forming rolls fixed to the ⁇ end portions of the double-hole holder.
- the divided forming roll of the lower roll is provided with an auxiliary roll 305c for receiving a band plate in the middle roll.
- 306 is a gear fixed to one end of the main shaft
- 307 is a bearing mounted on a support frame 302a near one end of the main shaft
- a gear 308 that is combined with the gear 306 is fixed to a medium simplification portion, and a tip of the driving device is fixed.
- This is a rotary shaft that is mechanically connected to a universal joint (not shown).
- Reference numeral 309 denotes an adjustment shaft rotatably penetrated inside the hollow of the main shaft.
- Reference numeral 310a and 310b denote a pair of screw portions provided at both ends of the adjustment shaft and having different screw directions.
- 1a, 31 1b are screws screwed into and retracted from both screw portions, respectively.
- 312a, 312b are one screw and the sol of one roll holder, and the other screw.
- the transmission mechanism interposed between the roller and the other roll holder, 313 is a handle for manual rotation fixed to the other end of the adjustment shaft, 314a, 314b is the transmission mechanism between the support frame and the transmission mechanism This is a digital gauge for moving distance display installed between them.
- the position holding means 304a, 304b provided on the roll holders 303a, 303b is an oil compression diameter mechanism for reducing the inner diameter, and is provided inside the peripheral wall very close to the circumferential surfaces of the roll holders 303a, 303b.
- An annular hydraulic chamber 34 la, 341 b is provided along the peripheral surface to supply hydraulic pressure from the outside, and the reduced-diameter thin-walled portions 342 a, 342 b forming the inner wall of the hydraulic chamber are formed by the hydraulic pressure. Bulge toward the spindle 301 and rotate the spindle 301 I try to stick around.
- the roll holder 303a, 303b has a flange at the inner end.
- the adjusting shaft 309 is rotatably mounted at both ends of the main shaft 301 via bearings 391a and 391b, and is fixed in the axial direction.
- the transmission mechanisms 312a and 312b are provided with cylindrical rotating hands 422a and 422b around the outer end of each roll holder 303b and 303b via bearings 421a and 421b. It is mounted rotatably and fixed in the cylinder direction, and bars 423a and 423b projecting to both sides are fitted around the outer circumference of the screw 311a and 31lb, and the support frame is fixed.
- a pair of support cylinders 32 1 a, 32 1 a, 32 1 b, 32 1 b are provided on both sleeves of 302 a, 302 b in parallel with the main shaft 301, and these support cylinders are provided.
- 424b is slidably penetrated, one end of each of these loads is connected to both ends of the bar 423a, 423a, 423b, 423b, and the other end is connected to the rotating shaft 422a, 422a. , 422b, and 422b are linked to each other.
- the rotary joints 422a, 422a, 422b, 422b are provided with oil passages 343a, 343b communicating with the hydraulic chambers 34 1a, 341b of the oil compression diameter mechanism. Is connected to a hydraulic hose (not shown) connected to an external hydraulic device.
- the hydraulic pressure is supplied to the hydraulic chambers 34 1 a and 34 1 b of the hydraulic pressure reducing mechanism as the position holding means 304 a and 304 b, and the thin-walled reduced diameter portions 342 a and 342 b are supplied by the hydraulic pressure.
- the position is restrained with respect to the spindle 301 by reducing the diameter.
- the torque from the driving device is transmitted to the driving shaft 307 through a universal joint (not shown), to the main shaft 301 via gears 308 and 306, and via the roll holders 303a and 303b. To the split forming rolls 305a and 305b.
- a drive shaft connected to a drive device is attached near one end of the main shaft, and torque can be transmitted from the gears provided on the drive shaft to the gears of the main shaft, so that the driving means can be simplified and the radiation in the main shaft direction (long ) Can be narrow (short) and compact.
- Adjustment of the roll interval can be performed very easily and in a short time by only operating the position holding means and handle, and the downtime of the production line can be minimized.
- the adjustment of the roll interval can be performed with high accuracy in l / 100mm order. It can be carried out.
- split rolls shown in FIGS. 41 and 42 show the upper roll, but the upper roll and the lower roll differ only in the shape of the roll peripheral surface. It can be applied to split rolls.
- Reference numeral 501 denotes a main shaft, and the main shaft has an outer cylinder shaft 3 rotatably fitted to the outer surface of a core shaft 502.
- Screw shafts 504 and 504 having mutually opposite screws project from the center of the left and right end surfaces of the core shaft 5G2 in the extension direction. Nuts on both screw shafts 504 and 504 505, 505 are screwed together, and one of the screw shafts is provided with a spindle 506 for rotating the core shaft.
- the left and right portions of the spindle 501 are fixed to support plates 510, 510.
- the support plate is formed by a part of the stand in the case of the lower roll adjusting device, and is formed by the suspension plate from the stand in the case of the upper roll.
- a pair of left and right sliding sleeves 515, 515 are fitted in the middle part of the main shaft between the support plates 510, 510 so as to freely slide in the axial direction.
- These sliding sleeves can be positioned at an arbitrary position with respect to the outer cylinder shaft 503.
- an oil compression diameter sleeve is used, and the inner diameter thereof is increased by pressurizing a hydraulic chamber 516 provided on the inner surface side of the sleeve.
- the diameter of the part is reduced, and the outer cylinder shaft 503 is tightened and fixed, and the inner diameter of the sleeve is restored due to a decrease in oil pressure so that the sleeve can be slid again.
- Various other means can be considered for the positioning mechanism.
- a bearing 525 is interposed between the split roll and the sliding sleeve.
- the sliding sleeves 515, 515 and the nuts 505, 505 described above are connected by a load 530.
- the engagement plates 531 and 532 protrude from the outer ends of the sliding sleeve and the nut toe, respectively, and the rods are connected to the support plates 510 and 510 through the engagement plates.
- 535, 535 are linear sensors attached to the left and right support plates 510, 510 for measuring the amount of horizontal sliding of the split rolls. is there.
- the screw shaft and nut should be backlashed by using precision screws such as ball screws.
- the present invention has the configuration described above, and is formed by rotatably fitting an outer cylinder shaft 503 to the outer surface of the main shaft 501 and the core shaft 502, and the left and right portions of the main shaft 501 are attached to support plates 510, 510.
- the screw shafts 504, 504, which are fixed and are mutually oppositely threaded from the center of both end surfaces of the core shaft, protrude, and the nuts 505, 505 are screwed to the screw shafts.
- the pair of sliding sleeves 515, 515 which are paired on the left and right, which are slidably fitted to each other, are connected by the rod 530. On the other hand, just turning the knob 506 attached to the outer end of the screw shaft, etc.
- the main body 501 has a sliding sleeve and a split roll fitted to the sleeve. There is no movement in any direction.
- FIG. 43 shows the application of a backlash removing device to the upper roll operating device of the first and second fin pass rolls 1F and 2F.
- reference numeral 601 denotes a pair of left and right stands.
- First chicks 604, 604 for supporting both ends of a fitting shaft 603 of a lower roll 602 are fitted to the lower portions of both stands.
- a long hole is vertically provided in the stand portion above the first chuck, and a second hole for supporting both ends of the fitting shaft 606 of the upper roll 605 is provided in the lower portion of each long hole.
- Two chicks 607, 607 are fitted to be vertically movable.
- the screw shafts 608, 608 are erected from the upper surface of the second chuck through the stand, and the pipes 609, 609 are fitted on the screw shafts.
- the threaded tube extends into the upper part of the stand, projects the upper part upwardly of the sleeve, fits and fixes a worm wheel 610 on the outer surface of the lower part of the upwardly projecting part, and surrounds the worm wheel with a box 61 1, A snap ring 612 fitted and fixed to the outer surface of the threaded portion above the worm wheel is placed on the box.
- worms (not shown) fitted to both sides of the worm shaft 6 13 are combined to form worm jacks 6 14 and 6 14.
- the worm jack can be operated by a reversible motor 616 fixed to the arm 615 protruding from the part.
- Fluid pressure cylinders 617, 617 are erected from the above boxes 611, 611, and the lower ends of the biston rods 618, 618 of the syringe are moved to the upper ends of the screw shafts, and the screw shafts are moved up by the pistons 6-1 9, 619.
- the upper roll 605 and the like can be pulled up through 608, 608.
- FIG. 3 shows a backlash removing device applied to the upper roll operating device of the center bend roll.
- the lower roll screws 21 and 21 and the upper roll stand (not shown) are separately provided.
- the brackets 626 and 626 are erected from the beams 23 and 23 of the upper roll stand to support the worm shaft 613, and one of the brackets supports the reversible motor 616 so that the worm shaft can be rotated.
- a worm jack 614 is provided in the worm shaft 6 13 and a worm jack 614 is provided on the base plate 627 erected between the beams, and the hanging substrate 628 is hung at the lower end of the screw shaft 608, and the left and right sides of the substrate Arms 629 hang down from both sides, and both ends of the fitting shaft 606 of the upper rolls 14, 15 are supported at the lower part of the arms 629, 629. Further, the lower ends of the fluid pressure cylinders 617 and 617 are fixed to the left and right sides of the base plate 627, and the lower ends of the piston rods 618 and 618 of the cylinder are suspended from the left and right sides of the suspension board 628. It is connected so that it can be raised.
- the fluid pressure cylinders 6 17, 6 17 are provided above the screw shafts 608, 608 for vertically moving the upper roll fitting shaft 606.
- the lower end of the cylinder's biston rod 6 18, 6 18 is connected to the upper end of the screw shaft 608, 608 so that the upper roll 605 can be pulled up. There is no need to take time.
- both ends of the upper roll fitting shaft 606 are supported by the arms 629 of the suspended substrate 628, and the suspended substrate can be vertically moved by the worm jack 614.
- the suspension board can be pulled up by the fluid pressure cylinder 617 provided separately, the fluid pressure cylinder does not become an obstacle when exchanging the upper rail.
- FIG. 44 to FIG. 46 are explanatory views showing modified examples of the cage roll.
- Cage rolls CR '", CR... apply side pressure from both sides to the pipe edge to the pipe side, so that the boundary between the pipe side and the pipe bottom is more continuous than the finally formed arc.
- the bottom portion of the raw tube is successively bent to approximately the same degree as the final growth circular arc to a moderate degree, so that the raw tube that has undergone this bending becomes a small cross section.
- cage roll C has 4 zones, 3 zones per zone, a total of 12 zones on each side, and as shown in Fig. 44, apply appropriate force from outside to the pipe edge to the pipe side as shown in Fig. 44.
- the boundary between the pipe side and the pipe bottom to the pipe bottom is bent sequentially while holding back the springback.
- Each roll stand is provided with advance / retreat adjusting means 724, elevating / lowering adjusting means 725, and angle adjusting means 726 separately for each roll.
- each cage roll CR "', CR'" has a concave roll surface and its radius of curvature is 1.0 to 2.0 times the maximum outer diameter of various sizes of steel pipes that are also manufactured. Is formed.
- the roll surface is formed as a concave curved surface having a larger radius of curvature than the radius of curvature of the molded flower at the corresponding position.
- the shape of the welded pipe can be smoothly fitted to the convex curved surface of the flower, and the surface of the welded pipe does not flatten in a streak shape.
- the strip is formed stably while improving the operation rate by a compact apparatus configuration, and high-quality welding is performed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP90917533A EP0607430B1 (en) | 1989-12-04 | 1990-12-04 | Apparatus for manufacturing welded steel pipe |
| KR1019910700834A KR930011517B1 (ko) | 1989-12-04 | 1990-12-04 | 용접강관의 제조장치 |
| DE69027786T DE69027786T2 (de) | 1989-12-04 | 1990-12-04 | Vorrichtung zur herstellung geschweisster stahlrohre |
| US07/721,566 US5301869A (en) | 1989-12-04 | 1990-12-04 | Machine for manufacturing welded steel pipes and method for handling the machine |
Applications Claiming Priority (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1/314694 | 1989-12-04 | ||
| JP1314694A JPH0636943B2 (ja) | 1989-12-04 | 1989-12-04 | 無駆動成形ロールの調整装置 |
| JP1314696A JPH03174922A (ja) | 1989-12-04 | 1989-12-04 | 溶接管のケージロール |
| JP1/314696 | 1989-12-04 | ||
| JP1317290A JPH06104252B2 (ja) | 1989-12-06 | 1989-12-06 | 溶接鋼管の製造装置 |
| JP89317289A JPH03180211A (ja) | 1989-12-06 | 1989-12-06 | 溶接管成形装置 |
| JP1/317289 | 1989-12-06 | ||
| JP1/317290 | 1989-12-06 | ||
| JP2/306297 | 1990-11-14 | ||
| JP2306297A JPH0698402B2 (ja) | 1990-11-14 | 1990-11-14 | 溶接鋼管の帯板縁部成形ロール |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1991008064A1 true WO1991008064A1 (en) | 1991-06-13 |
Family
ID=27530990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1990/001572 Ceased WO1991008064A1 (en) | 1989-12-04 | 1990-12-04 | Apparatus for manufacturing welded steel pipe and method of operating thereof |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5301869A (ja) |
| KR (1) | KR930011517B1 (ja) |
| AU (1) | AU639738B2 (ja) |
| CA (1) | CA2046317C (ja) |
| DE (1) | DE69027786T2 (ja) |
| WO (1) | WO1991008064A1 (ja) |
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| US9486636B2 (en) | 2009-02-20 | 2016-11-08 | Comptolife, Llc | Adaptation of the common notebook, laptop computer, netbook and tablet computer to enable each to be used as an automated external defibrillator (AED) to treat victims of sudden cardiac arrest |
| US9517354B2 (en) | 2009-02-20 | 2016-12-13 | Comptolife, Llc | Pocket kits and methods for retrofitting and adapting common notebook computers, laptop computers, and tablet computers, to enable each to be used as an automated external defibrillator (AED), and as a manual defibrillator |
| DE102020118420A1 (de) | 2020-07-13 | 2022-01-13 | Alexander Bonn | Vorrichtung zur Herstellung eines Rohres aus einem plastisch verformbaren Bandmaterial |
| CN116000549A (zh) * | 2022-12-19 | 2023-04-25 | 海口程启松科技有限公司 | 一种汽车减震器钢管焊接用工装夹具 |
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| JPS5439354A (en) * | 1977-09-05 | 1979-03-26 | Hitachi Ltd | Roll rearrangement for electrically seamed pipe production facility |
| JPS56100213U (ja) * | 1979-12-26 | 1981-08-07 | ||
| JPS5640649B2 (ja) * | 1977-02-17 | 1981-09-22 | ||
| JPS5762819A (en) * | 1980-10-01 | 1982-04-16 | Nippon Steel Corp | Forming device |
| JPS584205U (ja) * | 1981-06-30 | 1983-01-12 | 新日本製鐵株式会社 | クランプ装置 |
| JPS59171885U (ja) * | 1983-04-28 | 1984-11-16 | 三菱重工業株式会社 | 電縫管用スクイズロ−ルの位置調整装置 |
| JPS6137325A (ja) * | 1984-07-27 | 1986-02-22 | Shinnichi Kogyo Kk | V型ロ−ルによるパイプの成形法 |
| JPS6149732A (ja) * | 1984-08-18 | 1986-03-11 | Aichi Steel Works Ltd | 冷間ロ−ル成形における過負荷防止装置 |
| JPS61135428A (ja) * | 1984-12-04 | 1986-06-23 | Kawasaki Steel Corp | 電縫鋼管の成形装置 |
| JPS62114729A (ja) * | 1985-11-15 | 1987-05-26 | Sumitomo Heavy Ind Ltd | 電縫管製造設備におけるフオ−ミング装置 |
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| JPS5750093Y2 (ja) * | 1978-09-12 | 1982-11-02 | ||
| US4770019A (en) * | 1985-12-28 | 1988-09-13 | Nakata Manufacture Company Limited | Forming roll, forming process and its apparatus in the pipe mill |
| CH671904A5 (ja) * | 1987-05-08 | 1989-10-13 | Elpatronic Ag |
-
1990
- 1990-12-04 DE DE69027786T patent/DE69027786T2/de not_active Expired - Lifetime
- 1990-12-04 AU AU68767/91A patent/AU639738B2/en not_active Expired
- 1990-12-04 KR KR1019910700834A patent/KR930011517B1/ko not_active Expired - Lifetime
- 1990-12-04 WO PCT/JP1990/001572 patent/WO1991008064A1/ja not_active Ceased
- 1990-12-04 US US07/721,566 patent/US5301869A/en not_active Expired - Lifetime
- 1990-12-04 CA CA002046317A patent/CA2046317C/en not_active Expired - Lifetime
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| JPS5640649B2 (ja) * | 1977-02-17 | 1981-09-22 | ||
| JPS5439354A (en) * | 1977-09-05 | 1979-03-26 | Hitachi Ltd | Roll rearrangement for electrically seamed pipe production facility |
| JPS56100213U (ja) * | 1979-12-26 | 1981-08-07 | ||
| JPS5762819A (en) * | 1980-10-01 | 1982-04-16 | Nippon Steel Corp | Forming device |
| JPS584205U (ja) * | 1981-06-30 | 1983-01-12 | 新日本製鐵株式会社 | クランプ装置 |
| JPS59171885U (ja) * | 1983-04-28 | 1984-11-16 | 三菱重工業株式会社 | 電縫管用スクイズロ−ルの位置調整装置 |
| JPS6137325A (ja) * | 1984-07-27 | 1986-02-22 | Shinnichi Kogyo Kk | V型ロ−ルによるパイプの成形法 |
| JPS6149732A (ja) * | 1984-08-18 | 1986-03-11 | Aichi Steel Works Ltd | 冷間ロ−ル成形における過負荷防止装置 |
| JPS61135428A (ja) * | 1984-12-04 | 1986-06-23 | Kawasaki Steel Corp | 電縫鋼管の成形装置 |
| JPS62114729A (ja) * | 1985-11-15 | 1987-05-26 | Sumitomo Heavy Ind Ltd | 電縫管製造設備におけるフオ−ミング装置 |
| JPS62166027A (ja) * | 1986-01-14 | 1987-07-22 | Nakata Seisakusho:Kk | パイプミル用成形ロ−ル |
| JPH01165111U (ja) * | 1988-04-30 | 1989-11-17 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001095454A1 (en) * | 2000-06-09 | 2001-12-13 | Two Way Radio Systems Ltd | Electrical storage battery charger/analyser |
| DE10031916A1 (de) * | 2000-06-30 | 2002-01-31 | Horst Bonn | Vorrichtung zum Formen eines plastisch verformbaren Bandmaterials |
| DE10031916C2 (de) * | 2000-06-30 | 2002-10-10 | Horst Bonn | Vorrichtung zum Formen eines plastisch verformbaren Bandmaterials |
| US9486636B2 (en) | 2009-02-20 | 2016-11-08 | Comptolife, Llc | Adaptation of the common notebook, laptop computer, netbook and tablet computer to enable each to be used as an automated external defibrillator (AED) to treat victims of sudden cardiac arrest |
| US9517354B2 (en) | 2009-02-20 | 2016-12-13 | Comptolife, Llc | Pocket kits and methods for retrofitting and adapting common notebook computers, laptop computers, and tablet computers, to enable each to be used as an automated external defibrillator (AED), and as a manual defibrillator |
| US9789326B2 (en) | 2009-02-20 | 2017-10-17 | Comptolife, Llc | Defibrillation system |
| DE102020118420A1 (de) | 2020-07-13 | 2022-01-13 | Alexander Bonn | Vorrichtung zur Herstellung eines Rohres aus einem plastisch verformbaren Bandmaterial |
| CN116000549A (zh) * | 2022-12-19 | 2023-04-25 | 海口程启松科技有限公司 | 一种汽车减震器钢管焊接用工装夹具 |
| CN116000549B (zh) * | 2022-12-19 | 2023-12-05 | 上海弘唐信息科技有限公司 | 一种汽车减震器钢管焊接用工装夹具 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR920700793A (ko) | 1992-08-10 |
| KR930011517B1 (ko) | 1993-12-10 |
| US5301869A (en) | 1994-04-12 |
| DE69027786D1 (de) | 1996-08-14 |
| AU639738B2 (en) | 1993-08-05 |
| AU6876791A (en) | 1991-06-26 |
| CA2046317A1 (en) | 1991-06-05 |
| CA2046317C (en) | 1998-06-23 |
| DE69027786T2 (de) | 1997-01-09 |
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