CN111822563A - Pipe elbow punch forming die - Google Patents
Pipe elbow punch forming die Download PDFInfo
- Publication number
- CN111822563A CN111822563A CN202010708339.2A CN202010708339A CN111822563A CN 111822563 A CN111822563 A CN 111822563A CN 202010708339 A CN202010708339 A CN 202010708339A CN 111822563 A CN111822563 A CN 111822563A
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- China
- Prior art keywords
- pipe
- flexible pipe
- lower die
- flexible
- elbow
- 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.)
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- 239000006004 Quartz sand Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 24
- 238000010008 shearing Methods 0.000 description 9
- 238000005242 forging Methods 0.000 description 6
- 238000012937 correction Methods 0.000 description 5
- 238000004080 punching Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003781 tooth socket Anatomy 0.000 description 1
Images
Classifications
-
- 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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/15—Bending tubes using mandrels or the like using filling material of indefinite shape, e.g. sand, plastic material
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/06—Stripping-off devices
- B21D45/08—Stripping-off devices interrelated with motion of tool
-
- 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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/16—Auxiliary equipment, e.g. machines for filling tubes with sand
- B21D9/18—Auxiliary equipment, e.g. machines for filling tubes with sand for heating or cooling of bends
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention belongs to the technical field of punch forming dies, and particularly relates to a pipe elbow punch forming die which comprises an upper die and a lower die, wherein concave cavities are respectively arranged at adjacent sides of the upper die and the lower die, a pipe blank which is cut in advance is placed in the concave cavity at the top of the lower die, and inclined notches are arranged at two ends of the pipe blank; a sliding block is connected in a sliding groove formed in the top of the lower die in a sliding manner, and two ends of a screw rod arranged in the sliding groove are rotationally connected with the lower die; the screw penetrates through the sliding block and is connected with the sliding block through a screw nut pair, one end of the screw penetrates through the lower die and then is driven to rotate by a servo motor fixedly connected with the lower die, and the servo motor is connected with a power supply through a controller; the top of the sliding block is connected with a magnetic push plate through a support at a position corresponding to one end of the pipe blank, one side of the push plate close to the notch is parallel to the final positioning position of the notch, and one side of the push plate far away from the pipe blank is rotatably connected with the support through a rotating shaft.
Description
Technical Field
The invention belongs to the technical field of punch forming dies, and particularly relates to a pipe elbow punch forming die.
Background
The outer die structure for stamping the pipe elbow in the prior art generally comprises an upper die and a lower die, wherein the bottom surface of the upper die is arc-shaped and has a semicircular concave structure, the lower die has an arc-shaped structure matched with the bottom surface of the upper die and has a semicircular concave structure, and the outer die structure of the pipe elbow is designed so that the stamping angle of the elbow is limited by the radians of the upper die and the lower die, the processing mode is inflexible, and the phenomenon of irregular curved surface is easily caused
Some technical schemes about control elbow forming die have also appeared among the prior art, chinese patent like application number 2015208340618 discloses a control elbow stamping forming die, including last mould and lower mould, it is provided with the cavity respectively to go up mould and lower mould, the cavity combination of going up mould and lower mould constitutes the process chamber with control elbow shape looks adaptation, still include the core and with the core positioning assembly at processed pipeline middle part, the core can be followed and processed the pipeline axial and slided, core top terminal surface offsets with the inner wall at processed pipeline middle part, the shape looks adaptation of below terminal surface and the pipeline inner wall after processing. Adopt above-mentioned scheme, the utility model provides a control elbow stamping forming mould of shaping effectual, internal diameter standard. However, in the prior art, the tube blank is manually installed at the top of the lower die and the position is corrected, time and labor are wasted in the position correction process due to the fact that the weight of the tube blank is large, the stamping efficiency of the tube blank is seriously reduced, the hand of the tube blank is easily squeezed and injured in the moving process, and potential safety hazards are increased.
In view of this, in order to overcome the above technical problems, the company designs and develops a pipe bend punch forming die, and the screw slider slides to drive the bracket and the push plate to approach and push the pipe blank, so as to increase the punch forming precision of the pipe blank, improve the punch quality of the pipe bend, and solve the above technical problems.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a punch forming die for a pipe bend, which is mainly used for solving the problems that in the prior art, a pipe blank is manually installed at the top of a lower die, the position is corrected, time and labor are wasted in the position correction process due to the fact that the weight of the pipe blank is large, the punching efficiency of the pipe blank is seriously reduced, the hand is easily squeezed and damaged in the moving process of the pipe blank, and the potential safety hazard is increased.
The technical scheme adopted by the invention for solving the technical problems is as follows: the punch forming die for the pipe bend comprises an upper die and a lower die, wherein concave cavities are respectively arranged on one adjacent sides of the upper die and the lower die, the upper concave cavity and the lower concave cavity are combined to form a processing cavity matched with the shape of the pipe bend, a pipe blank which is cut in advance is placed in the concave cavity at the top of the lower die, and inclined notches are formed in two ends of the pipe blank; a sliding block is connected in a sliding groove formed in the top of the lower die in a sliding manner, and two ends of a screw rod arranged in the sliding groove are rotationally connected with the lower die; the screw penetrates through the sliding block and is connected with the sliding block through a screw rod nut pair, one end of the screw penetrates through the lower die and then is driven to rotate by a servo motor fixedly connected with the lower die, and the servo motor is connected with a power supply through a controller; the top of the sliding block is connected with a magnetic push plate through a support at a position corresponding to one end of the pipe blank, one side of the push plate close to the notch is parallel to the final positioning position of the notch, one side of the push plate far away from the pipe blank is rotatably connected with the support through a rotating shaft, and the push plate is driven by a screw to quickly position the pipe blank, so that the bending forming efficiency of the die is improved; when the device works, the tube blank is manually installed at the top of a lower die and the position is corrected in the prior art, the tube blank is heavy, time and labor are wasted in the position correction process, the stamping efficiency of the tube blank is seriously reduced, the hand of the tube blank is easily squeezed and injured in the moving process, and the potential safety hazard is increased, at the moment, the tube blank is hoisted into a cavity at the top of the lower die through hoisting equipment, then a screw rod is driven to rotate through a servo motor, a sliding block is further driven to slide in a sliding groove, a support and a push plate are driven to be close to and push the tube blank, so that the horizontal direction of the tube blank is positioned at the central position of the cavity, the stamping forming precision of the tube blank is increased, meanwhile, the push plate is parallel to the final positioning position of the notch, the push plate is rotatably connected with the support through a rotating shaft, and then the upper die is driven to descend by the forging press and is matched with the lower die, so that the punch forming of the tube blank can be completed, the punch forming precision of the tube blank is further improved, and the punching quality of the controlled elbow is improved.
Preferably, a flexible pipe with two closed ends is arranged in the tube blank, quartz sand is filled in the flexible pipe, the length of the flexible pipe is slightly larger than the shortest distance between two notches on the tube blank, and the support performance of the two ends of the tube blank is improved; the flexible pipe serves as a mold core, so that abnormal deformation of the controlled elbow is further reduced, and the molding quality of the controlled elbow is improved; insert the pipe middle part and fill quartz sand through the flexible tube for the flexible tube acts as the core effect, increases the support to the pipe billet inner wall, makes the pipe billet pass through the support of flexible tube at stamping forming's in-process, makes the even smooth deformation of pipe billet, reduces the local unusual sunken of pipe billet, further increases the stamping forming quality of pipe billet.
Preferably, the peripheries of the two ends of the flexible pipe are sleeved with cylindrical flexible steel rings, the extrusion of the notches on the flexible pipe is reduced through the flexible steel rings, and the service life of the flexible pipe is further prolonged; because flexible pipe length slightly is greater than the minimum distance between two incisions on the pipe, make the mould at the in-process down and the extrusion pipe, the flexible pipe receives the extrusion, it is out of shape along with the deformation of pipe at the in-process that supports the pipe inner wall, and then make flexible pipe both ends inflation, make the incision increase the shearing force to the flexible pipe, and then make the flexible pipe receive great wearing and tearing at incision department, the flexible steel ring of establishing through flexible pipe both ends cover this moment, make the pressure of flexible steel ring dispersion incision to the flexible pipe, reduce the incision to the shearing force of flexible pipe, and then reduce the wearing and tearing and the shearing damage of flexible pipe, further increase the life of flexible pipe.
Preferably, a pull rod penetrating through the flexible pipe is arranged in the axial direction of the flexible pipe, a pair of discs is symmetrically arranged at two ends of the flexible pipe, one end of the pull rod is connected with the disc at the corresponding position, and the other end of the pull rod is in threaded connection with the nut; the pull rod penetrates through the disc between the nut and the flexible pipe; the flexible pipe is extruded through the nut, so that the compactness of quartz sand is improved, and the molding quality of the controlled elbow is further improved; the disc is extruded through the rotary nut, so that the axial deformation of the flexible pipe is limited by the aid of the pull rod matched with the disc, the compactness of quartz sand is further improved, the supporting force of the flexible pipe on the inner wall of the pipe blank is further improved, abnormal concave deformation of the pipe blank in the stamping process is further reduced, and the stamping forming quality of the control elbow is improved.
Preferably, a gear is arranged at one end of the nut, a rack is fixedly connected to one side of the upper die and the position corresponding to the gear through a support rod, the rack is meshed with the gear when the upper die falls, so that the pressure of the nut on the disc is increased, and the forming quality of the control elbow is further increased; when going up the mould and moving down and extrude the pipe under forging press's drive, drive rack downstream through branch, and then make rack and gear intermeshing back drive the gear rotatory, and then further increase the locking to the pull rod through the gear, increase the closely knit degree of quartz sand, and then further increase the stamping forming quality of control elbow.
Preferably, a group of tooth grooves are uniformly distributed on the circumference of the pull rod on one side of the nut, which is far away from the disc, a group of fixture blocks are fixedly connected to the rack at positions corresponding to the tooth grooves, clamping plates are hinged to clamping grooves formed in the fixture blocks, the pull rod is rotatably connected with the disc, a packing auger is arranged at the position of the pull rod in the flexible tube, and the clamping plates are used for matching the tooth grooves to drive the pull rod to rotate when the upper die is lifted; the demolding efficiency of the flexible pipe is improved through the rotation of the packing auger; because articulated in the draw-in groove of seting up on the fixture block have the cardboard, make the cardboard along with rack downstream in-process, the cardboard constantly rotates and marks the tooth's socket, after the pipe punching press is accomplished, shift up and accomplish the drawing of patterns through last mould, the cardboard blocks the tooth's socket under the spacing of draw-in groove this moment, and then it is rotatory to drive the pull rod, the drive auger rotates and makes the quick not hard up of quartz sand in the flexible tube, reduce the holding power of flexible tube to the pipe, and then increase the efficiency of taking out of flexible tube, further increase the stamping forming efficiency of control elbow.
The invention has the following beneficial effects:
1. according to the die for punch forming the controlled elbow, the screw rod is driven to rotate through the servo motor, so that the sliding block is driven to slide in the sliding groove, the support and the push plate are driven to be close to and push the pipe blank, the pipe blank is horizontally positioned at the center of the concave cavity, the punch forming precision of the pipe blank is improved, and the punch quality of the controlled elbow is improved.
2. According to the pipe elbow punch forming die, after the pipe blank is punched, the upper die moves upwards and the die stripping is completed, the clamping plate clamps the tooth grooves under the limiting of the clamping grooves, the pull rod is driven to rotate, the auger is driven to rotate, so that quartz sand in the flexible pipe is quickly loosened, the supporting force of the flexible pipe on the pipe blank is reduced, the taking-out efficiency of the flexible pipe is increased, and the punch forming efficiency of the pipe elbow is further increased.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a partial enlarged view of FIG. 1 at B
FIG. 5 is a schematic view of the structure of the tooth socket and the locking plate of the present invention;
in the figure: the device comprises an upper die 1, a lower die 11, a cavity 12, a tube blank 13, a notch 14, a sliding chute 15, a sliding block 16, a screw 17, a servo motor 18, a support 19, a push plate 2, a rotating shaft 21, a flexible tube 22, a flexible steel ring 23, a pull rod 24, a disc 25, a nut 26, a gear 3, a support rod 31, a rack 32, a tooth groove 33, a clamping block 34, a clamping groove 35, a clamping plate 36 and an auger 37.
Detailed Description
A pipe bend press molding die according to an embodiment of the present invention will be described below with reference to fig. 1 to 5.
As shown in fig. 1-5, the pipe bend punch forming die comprises an upper die 1 and a lower die 11, wherein concave cavities 12 are respectively arranged on adjacent sides of the upper die 1 and the lower die 11, the upper concave cavity 12 and the lower concave cavity 12 are combined to form a processing cavity matched with the shape of a pipe bend, a pipe blank 13 which is cut in advance is placed in the concave cavity 12 at the top of the lower die 11, and inclined notches 14 are arranged at two ends of the pipe blank 13; a sliding block 16 is connected in a sliding groove 15 formed in the top of the lower die 11 in a sliding manner, and two ends of a screw 17 arranged in the sliding groove 15 are rotatably connected with the lower die 11; the screw 17 penetrates through the sliding block 16 and is connected with the sliding block 16 through a screw nut pair, one end of the screw 17 penetrates through the lower die 11 and then is driven to rotate by a servo motor 18 fixedly connected with the lower die 11, and the servo motor 18 is connected with a power supply through a controller; the magnetic push plate 2 is connected to the position, corresponding to one end of the tube blank 13, of the top of the sliding block 16 through a support 19, one side, close to the notch 14, of the push plate 2 is parallel to the final positioning position of the notch 14, one side, far away from the tube blank 13, of the push plate 2 is rotatably connected with the support 19 through a rotating shaft 21, the push plate 2 is driven by a screw 17 to rapidly complete positioning of the tube blank 13, and the bending forming efficiency of the die is improved; during operation, the tube blank 13 is manually installed on the top of the lower die 11 and the position is corrected in the prior art, as the tube blank 13 has a large weight, time and labor are wasted in the position correction process, the stamping efficiency of the tube blank 13 is seriously reduced, the tube blank 13 is easy to squeeze hands in the moving process, and potential safety hazards are increased, at this time, the tube blank 13 is hoisted into the cavity 12 on the top of the lower die 11 through the hoisting equipment, then the screw 17 is driven to rotate through the servo motor 18, the sliding block 16 is further driven to slide in the sliding groove 15, the support 19 and the push plate 2 are driven to be close to and push the tube blank 13, the tube blank 13 is horizontally positioned at the central position of the cavity 12, the stamping forming precision of the tube blank 13 is increased, meanwhile, as the push plate 2 is parallel to the final positioning position of the notch 14, the push plate 2 is rotatably connected with the support 19 through the rotating shaft 21, and the, the notch 14 of the tube blank 13 is located at a preset position, and then the upper die 1 is driven by the forging press to descend and be matched with the lower die 11, so that the tube blank 13 can be subjected to punch forming, the punch forming precision of the tube blank 13 is further improved, and the punching quality of a controlled elbow is improved.
As an embodiment of the invention, a flexible tube 22 with two closed ends is arranged in the tube blank 13, the flexible tube 22 is filled with quartz sand, the length of the flexible tube 22 is slightly greater than the shortest distance between two notches 14 on the tube blank 13, and the support property of the two ends of the tube blank 13 is increased; the flexible pipe 22 serves as a mold core, so that abnormal deformation of the controlled elbow is further reduced, and the molding quality of the controlled elbow is improved; insert pipe 13 middle part and fill the quartz sand through flexible tube 22 for flexible tube 22 acts as the core effect, increases the support to pipe 13 inner wall, makes pipe 13 pass through flexible tube 22's support at stamping forming's in-process, makes pipe 13 even smooth deformation, reduces pipe 13 local unusual sunken, further increases pipe 13's stamping forming quality.
As an embodiment of the present invention, a cylindrical flexible steel ring 23 is sleeved on the outer periphery of each end of the flexible pipe 22, and the flexible steel ring 23 reduces the extrusion of the notch 14 on the flexible pipe 22, thereby further prolonging the service life of the flexible pipe 22; because the length of the flexible pipe 22 is slightly greater than the shortest distance between the two notches 14 on the pipe blank 13, the flexible pipe 22 is extruded when the upper die 1 moves downwards and extrudes the pipe blank 13, the flexible pipe 22 deforms along with the deformation of the pipe blank 13 in the process of supporting the inner wall of the pipe blank 13, and then the two ends of the flexible pipe 22 expand, so that the notches 14 increase the shearing force on the flexible pipe 22, and further the flexible pipe 22 is greatly abraded at the notches 14, at the moment, the flexible steel rings 23 sleeved at the two ends of the flexible pipe 22 enable the flexible steel rings 23 to disperse the pressure of the notches 14 on the flexible pipe 22, the shearing force of the notches 14 on the flexible pipe 22 is reduced, the abrasion and the shearing damage of the flexible pipe 22 are reduced, and the service life of the flexible pipe 22 is further prolonged.
As an embodiment of the present invention, a pull rod 24 penetrating through the flexible tube 22 is arranged in the axial direction of the flexible tube 22, a pair of disks 25 are symmetrically arranged at two ends of the flexible tube 22, one end of the pull rod 24 is connected with the disk 25 at the corresponding position, and the other end is in threaded connection with a nut 26; the pull rod 24 penetrates through the disc 25 between the nut 26 and the flexible tube 22; the nut 26 is used for extruding the flexible pipe 22, so that the compactness of quartz sand is improved, and the molding quality of the controlled elbow is further improved; the disc 25 is extruded through the rotary nut 26, so that the pull rod 24 is matched with the disc 25 to limit the axial deformation of the flexible tube 22, the compactness of quartz sand is further improved, the supporting force of the flexible tube 22 on the inner wall of the tube blank 13 is further improved, the abnormal concave deformation of the tube blank 13 in the stamping process is further reduced, and the stamping forming quality of the controlled elbow is improved.
As an embodiment of the invention, one end of the nut 26 is provided with a gear 3, a rack 32 is fixedly connected to a position on one side of the upper die 1 corresponding to the gear 3 through a support rod 31, when the upper die 1 falls, the rack 32 is meshed with the gear 3 to increase the pressure of the nut 26 on the disc 25, and further increase the forming quality of the control elbow; when going up mould 1 and moving down and extrusion pipe 13 under the drive of forging press, drive rack 32 through branch 31 and move down, and then make rack 32 and gear 3 intermeshing back drive gear 3 rotatory, and then further increase the locking to pull rod 24 through gear 3, increase the closely knit degree of quartz sand, and then further increase the stamping forming quality of control elbow.
As an embodiment of the invention, a group of tooth grooves 33 are uniformly distributed on the circumference of the pull rod 24 on one side of the nut 26 away from the disc 25, a group of fixture blocks 34 are fixedly connected to positions on the rack 32 corresponding to the tooth grooves 33, a clamping plate 36 is hinged in a clamping groove 35 formed in each fixture block 34, the pull rod 24 is rotatably connected with the disc 25, a packing auger 37 is arranged at a position of the pull rod 24 in the flexible pipe 22, and the clamping plate 36 is used for driving the pull rod 24 to rotate by matching with the tooth grooves 33 when the upper die 1 is lifted; the stripping efficiency of the flexible pipe 22 is increased by the rotation of the auger 37; because the clamping groove 35 formed in the clamping block 34 is hinged with the clamping plate 36, the clamping plate 36 continuously rotates and sweeps the tooth groove 33 in the downward movement process along with the rack 32, after the tube blank 13 is punched, the upper die 1 moves upwards and completes the demolding, the clamping plate 36 clamps the tooth groove 33 under the limiting position of the clamping groove 35 at the moment, the pull rod 24 is further driven to rotate, the auger 37 is driven to rotate, so that the quartz sand in the flexible tube 22 is rapidly loosened, the supporting force of the flexible tube 22 on the tube blank 13 is reduced, the taking-out efficiency of the flexible tube 22 is further increased, and the stamping forming efficiency of the control elbow is further increased.
During operation, the tube blank 13 is manually installed on the top of the lower die 11 and the position is corrected in the prior art, as the tube blank 13 has a large weight, time and labor are wasted in the position correction process, the stamping efficiency of the tube blank 13 is seriously reduced, the tube blank 13 is easy to squeeze hands in the moving process, and potential safety hazards are increased, at this time, the tube blank 13 is hoisted into the cavity 12 on the top of the lower die 11 through the hoisting equipment, then the screw 17 is driven to rotate through the servo motor 18, the sliding block 16 is further driven to slide in the sliding groove 15, the support 19 and the push plate 2 are driven to be close to and push the tube blank 13, the tube blank 13 is horizontally positioned at the central position of the cavity 12, the stamping forming precision of the tube blank 13 is increased, meanwhile, as the push plate 2 is parallel to the final positioning position of the notch 14, the push plate 2 is rotatably connected with the support 19 through the rotating shaft 21, and the, the notch 14 of the tube blank 13 is positioned at a preset position, and then the upper die 1 is driven by a forging press to descend and is matched with the lower die 11, so that the tube blank 13 can be subjected to punch forming, the punch forming precision of the tube blank 13 is further improved, and the punching quality of a controlled elbow is improved; the flexible pipe 22 is inserted into the middle of the tube blank 13 and filled with quartz sand, so that the flexible pipe 22 serves as a mold core, the support on the inner wall of the tube blank 13 is increased, the tube blank 13 is uniformly and smoothly deformed through the support of the flexible pipe 22 in the punch forming process of the tube blank 13, the local abnormal depression of the tube blank 13 is reduced, and the punch forming quality of the tube blank 13 is further increased; because the length of the flexible pipe 22 is slightly greater than the shortest distance between the two notches 14 on the pipe blank 13, the flexible pipe 22 is extruded when the upper die 1 descends and extrudes the pipe blank 13, the flexible pipe 22 deforms along with the deformation of the pipe blank 13 in the process of supporting the inner wall of the pipe blank 13, so that the two ends of the flexible pipe 22 expand, the notches 14 increase the shearing force on the flexible pipe 22, the flexible pipe 22 is subjected to larger abrasion at the notches 14, at the moment, the flexible steel rings 23 sleeved at the two ends of the flexible pipe 22 enable the flexible steel rings 23 to disperse the pressure of the notches 14 on the flexible pipe 22, the shearing force of the notches 14 on the flexible pipe 22 is reduced, the abrasion and shearing damage of the flexible pipe 22 are reduced, and the service life of the flexible pipe 22 is further prolonged; the disc 25 is extruded by rotating the nut 26, so that the counter-pull rod 24 and the disc 25 are matched to limit the axial deformation of the flexible tube 22, the compactness of quartz sand is further improved, the supporting force of the flexible tube 22 on the inner wall of the tube blank 13 is further improved, the abnormal concave deformation of the tube blank 13 in the stamping process is further reduced, and the stamping forming quality of the controlled elbow is improved; when the upper die 1 moves downwards under the driving of the forging press and extrudes the tube blank 13, the rack 32 is driven to move downwards through the supporting rod 31, so that the rack 32 and the gear 3 are meshed with each other and then the gear 3 is driven to rotate, further the locking of the pull rod 24 is increased through the gear 3, the compactness of quartz sand is increased, and the punch forming quality of the controlled elbow is further increased; (ii) a Because the clamping groove 35 formed in the clamping block 34 is hinged with the clamping plate 36, the clamping plate 36 continuously rotates and sweeps the tooth groove 33 in the downward movement process along with the rack 32, after the tube blank 13 is punched, the upper die 1 moves upwards and completes the demolding, the clamping plate 36 clamps the tooth groove 33 under the limiting position of the clamping groove 35 at the moment, the pull rod 24 is further driven to rotate, the auger 37 is driven to rotate, so that the quartz sand in the flexible tube 22 is rapidly loosened, the supporting force of the flexible tube 22 on the tube blank 13 is reduced, the taking-out efficiency of the flexible tube 22 is further increased, and the stamping forming efficiency of the control elbow is further increased.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. Control elbow stamping forming mould, including last mould (1) and lower mould (11), it is equipped with cavity (12) respectively to go up adjacent one side of mould (1) and lower mould (11), and upper and lower cavity (12) make up the processing chamber that constitutes and control elbow shape looks adaptation, its characterized in that: a pipe blank (13) which is cut in advance is placed in a concave cavity (12) at the top of the lower die (11), and two ends of the pipe blank (13) are provided with inclined notches (14); a sliding block (16) is connected in a sliding groove (15) formed in the top of the lower die (11) in a sliding manner, and two ends of a screw rod (17) arranged in the sliding groove (15) are rotatably connected with the lower die (11); the screw (17) penetrates through the sliding block (16) and is connected with the sliding block (16) through a screw-nut pair, one end of the screw (17) penetrates through the lower die (11) and then is driven to rotate by a servo motor (18) fixedly connected with the lower die (11), and the servo motor (18) is connected with a power supply through a controller; slider (16) top corresponds the position with pipe (13) one end and is connected with magnetic push pedal (2) through support (19), one side that push pedal (2) are close to incision (14) is parallel with incision (14) final positioning position, and one side that pipe (13) were kept away from in push pedal (2) is rotated through pivot (21) and support (19) and is connected, drives push pedal (2) through screw rod (17) and accomplishes the location to pipe (13) fast, increases the return bend shaping efficiency of mould.
2. The punch forming die for the controlled elbow according to claim 1, wherein: the tube blank (13) is internally provided with a flexible tube (22) with two closed ends, quartz sand is filled in the flexible tube (22), the length of the flexible tube (22) is slightly greater than the shortest distance between two notches (14) on the tube blank (13), and the supportability of the two ends of the tube blank (13) is improved; the flexible pipe (22) serves as a mold core, so that abnormal deformation of the controlled elbow is further reduced, and the molding quality of the controlled elbow is improved.
3. The punch forming die for the controlled elbow as claimed in claim 2, wherein: the periphery of the two ends of the flexible pipe (22) is sleeved with a cylindrical flexible steel ring (23), the extrusion of the notch (14) to the flexible pipe (22) is reduced through the flexible steel ring (23), and the service life of the flexible pipe (22) is further prolonged.
4. The punch forming die for the control elbow of claim 3, wherein: a pull rod (24) penetrating through the flexible pipe (22) is arranged in the axial direction of the flexible pipe (22), a pair of discs (25) is symmetrically arranged at two ends of the flexible pipe (22), one end of the pull rod (24) is connected with the disc (25) at the corresponding position, and the other end of the pull rod is in threaded connection with a nut (26); the pull rod (24) penetrates through the disc (25) between the nut (26) and the flexible pipe (22); the nut (26) is used for extruding the flexible pipe (22), so that the compactness of quartz sand is increased, and the molding quality of the controlled elbow is further increased.
5. The punch forming die for the control elbow of claim 4, wherein: nut (26) one end is equipped with gear (3), goes up mould (1) one side and gear (3) and corresponds the position and has linked firmly rack (32) through branch (31), goes up mould (1) when whereabouts rack (32) and gear (3) meshing increase nut (26) to the pressure of disc (25), further increases the shaping quality of control elbow.
6. The punch forming die for the controlled elbow as claimed in claim 5, wherein: a group of tooth grooves (33) are uniformly distributed on the circumference of the pull rod (24) on one side, away from the disc (25), of the nut (26), a group of clamping blocks (34) are fixedly connected to the positions, corresponding to the tooth grooves (33), of the racks (32), clamping plates (36) are hinged to clamping grooves (35) formed in the clamping blocks (34), the pull rod (24) is rotatably connected with the disc (25), packing augers (37) are arranged at positions, located in the flexible pipe (22), of the pull rod (24), and the clamping plates (36) are used for matching the tooth grooves (33) to drive the pull rod (24) to rotate when the upper die (1) rises; the stripping efficiency of the flexible pipe (22) is increased by the rotation of the packing auger (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010708339.2A CN111822563A (en) | 2020-07-22 | 2020-07-22 | Pipe elbow punch forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010708339.2A CN111822563A (en) | 2020-07-22 | 2020-07-22 | Pipe elbow punch forming die |
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| Publication Number | Publication Date |
|---|---|
| CN111822563A true CN111822563A (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010708339.2A Pending CN111822563A (en) | 2020-07-22 | 2020-07-22 | Pipe elbow punch forming die |
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| CN (1) | CN111822563A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115781196A (en) * | 2022-12-14 | 2023-03-14 | 江苏志得管业有限公司 | Cold machining process for pipe fitting elbow structure |
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Application publication date: 20201027 |