WO2011117147A1 - Verfahren zur herstellung von lamellen für wärmeaustauscher und vorrichtung zur durchführung dieses verfahrens - Google Patents
Verfahren zur herstellung von lamellen für wärmeaustauscher und vorrichtung zur durchführung dieses verfahrens Download PDFInfo
- Publication number
- WO2011117147A1 WO2011117147A1 PCT/EP2011/054105 EP2011054105W WO2011117147A1 WO 2011117147 A1 WO2011117147 A1 WO 2011117147A1 EP 2011054105 W EP2011054105 W EP 2011054105W WO 2011117147 A1 WO2011117147 A1 WO 2011117147A1
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- WIPO (PCT)
- Prior art keywords
- punch
- collar
- die
- range
- plate
- 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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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
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
Definitions
- the present invention relates to a process for the production of fins for heat exchangers and to an apparatus for carrying out such a process.
- a hole is punched in a metal sheet, and then the edge region of this hole is rolled or deep-drawn into a collar, and optionally crimped in a final step.
- the CH5007S3 describes a process which makes it possible to use harder, cheaper sheet or foil qualities for the lamellae without increasing the cost of the manufacturing process allows.
- the collars from the flat, provided with pre-punched openings slats are cold rolled by means of a rotating tool cold. It has been shown that it relatively hard rolled sheets or films without difficulty in a single, short operation can be provided with collar, without the material breaks.
- the inner surface of the collars, which is machined during deep rolling, can be made sufficiently cylindrical and smooth without any particular difficulty, so that the laminations can be easily lined up on the tubes. By corresponding increase in the speed of the tool, the processing speed can be selected practically arbitrarily high. The problem with this method is that only collar a certain maximum height can be made.
- neither of the two proportions must occur in any significant excess in any of the peripheral areas of the opening. As soon as strain hardening or non-smooth cutting in a section of the opening make up a too high proportion, cracks are very likely to form in the subsequent forming process for forming the collar, which in turn give rise to high rejects.
- a direct locking of the die holding plate and the punch holding plate are also understood to mean constructions in which components which carry the die holding plate firmly fastened, or components which carry the punch holding plate firmly secured, are locked together.
- the die holding plate holding the die is mounted on a first module block (which in turn may be fixed to a base plate of a column frame or may preferably be mounted floating on such a base), and / or the punch holding plate holding the punch one second module block (which in turn may be mounted on the other base plate of a pillar rack, or may preferably be mounted floating on such), and that the direct guide elements directly guide or position the first module block relative to the punch holder plate, or the first module block relative to the second Lead or respectively position the module block, or guide or position the die holding plate relative to the second module block.
- the guide elements are at least one, preferably a plurality of guide columns, for example two guide columns arranged laterally outside the sheet-metal strip, one on each side.
- These can either be fixed immovably in the punch holder plate and be guided in the die holding plate in a guide opening axially substantially free of play.
- they may be immovably fixed in the die holding plate and axially guided in the punch holding plate in a guide opening substantially free of play. It is also possible to use these two different types of storage combined in the same tool.
- a further particularly preferred embodiment is characterized in that the plate is mounted floating with the ceremoniessöffhung in the tool. This ensures that the desired precision of the relative arrangement of the two plates is also ensured by long-term guidance of the process. It is unnecessary presets as well as Nachdianen etc.
- the pillar-side holding be floating or both plates can be stored floating.
- the blade is made of an aluminum sheet (respectively aluminum alloys, for example, AW1050 grade aluminum) having a Brinell hardness in the range of 17-21, preferably in the range of 18-20.
- the quality AW1050 or hardness Hl 9 is particularly preferred.
- this material has an elongation at break A50 in the range of 1-3%, preferably in the range of 2%.
- the lamella is also preferably made of an aluminum sheet having a thickness in the range of 0.25-0.30 mm, preferably in the range of 0.26-0.28 mm.
- a collar with an inner diameter d4 in the range of more than 1.6 times the inner diameter d3 of the opening, preferably produced by more than 1.7 times the inner diameter d3 of the opening starting from an inner diameter d3 of the opening, preferably in the range of 10 14 mm, a collar with an inner diameter d4 in the range of more than 1.6 times the inner diameter d3 of the opening, preferably produced by more than 1.7 times the inner diameter d3 of the opening.
- ratio in the range of 1.78 can be achieved.
- ratios of up to 1.55 or at most 1.58 have so far been reliably reproducible with such materials.
- an embossing in the form of a recess extending around the punching opening and arranged in a plane parallel to the plane of the sheet with an outer diameter d2, which is greater than the inner diameter d4 of the collar, is produced at the same time for stamping in the sheet metal, wherein the recess is made the sheet plane is offset in the direction opposite to the collar direction. Due to the additional formation of such an embossing, the slats can then postpone much better on lines and have a higher rigidity.
- the punching of the punch opening can be done before the formation of the depression or after the formation of the depression.
- the recess is produced, and in a subsequent step generates the punch opening.
- the formation of the depression in two separate processing steps, in a preferred step and in a subsequent forming step for producing the depression, as it should serve as a starting point for the steps for the production of the collar.
- the punching of the punched opening can take place before or after the preferential step or after the subsequent forming step.
- the recess produced thereby has a shape, so that in the peripheral edge region of the recess, a circumferential recess is arranged, and enclosed by this again a slightly recessed to the sheet plane central floor area is present.
- a recess is preferably produced in the preferred step, which is then set back slightly in the subsequent forming step to the sheet metal plane.
- the collar rotating shaft is preferably formed with a diameter which is greater than the outer diameter of the recess, which serves as a starting point for the steps for generating the collar.
- a central bump i. a recess or dent which is circularly symmetrical about the axis of symmetry and whose direction is preferably opposite to the direction in which the recess is offset from the plane of the sheet.
- the upper edge thereof is then further circumferentially folded over to a beading edge, which runs essentially parallel to the sheet metal plane.
- the collar is produced with a roller burnishing punch, which has in the range of 3-6, preferably 5 symmetrically arranged rolling balls, wherein the diameter d10 of the lower vertices is preferably less than or equal to the inner diameter of the opening. That the diameter d10 of the lower vertices is less than or equal to the inner diameter of the opening may be e.g. then unnecessary if the processing area is preformed, e.g. in the figures le3), lf3), lg3) or lh3 is shown.
- the Rollierkugeln can be rotatably mounted in Rollierstempel or preferably are welded into this or soldered.
- a further preferred embodiment of the proposed method is characterized in that the collar is produced with a Rollierstkov whose outer diameter dl l is selected relative to the inner diameter dl2 of the die for the rolling die so that the tool gap is less than the thickness of the processed sheet, said preferably the tool gap in the range of 0.03-0.07 min is less than this thickness.
- the present invention relates to a fin for a heat exchanger produced by a method as described above.
- a blade consists of an aluminum sheet having a thickness in the range of 0.25-0.32 mm or 0.25-0.30 mm with a Brinell hardness in the range of 17-21, preferably in the range of 18-20, preferably with an elongation at break A50 in the range of 1-3%, preferably in the range of 2%.
- such a blade further preferably has a collar of a height h1 (before crimping, as seen for example in Fig. 1) in the range of more than 3.5 mm, preferably more. as 3.9 mm with an inner diameter d4 of the collar in the range of 18-19 mm.
- a typical height hl that can be achieved with the proposed method is 4.4-4.6 mm.
- the present invention relates to an apparatus for carrying out a method as described above, that is to say for producing a lamella as described above.
- a device preferably comprises at least one module for punching openings and a downstream in the process module for cold deep rolling a collar and is also characterized in particular in that the tool for producing the openings has a punch and a die, and that a die holding the die Die holding plate and holding the punch punch holding plate have direct guide elements which guide and position the plates relative to each other.
- a preferred embodiment of such a device is characterized in that it is at the guide elements at least one, preferably a plurality of guide columns, which are immovably fixed either in the punch holding plate and axially guided in the die holding plate in a guide opening substantially free of play, or which immovably fixed in the die holding plate and axially guided in the punch holding plate in a guide opening substantially free of play.
- the plate with the guide opening is mounted floating in the tool.
- a guide column Under a guide column is generally a guide element to understand, which may have a circular cross-section, but may also be designed as a profile rail or as a column with a non-circular cross-section.
- guide elements lead the punch holding plate or die holding plate (or the module plates directly supporting these plates) over the entire stroke, that is to say the locking remains the entire process. But it is also possible to ensure the locking only shortly before the actual punching process.
- a guide element is also to be understood as a construction in which, between the elements to be locked, for example, with the aid of groove / comb or nub / indentation, in each case shortly before the meeting of the elements, the locking is temporarily established only for the actual stamping process.
- such a device is preferably characterized in that the punching module and the module for cold deep rolling and optionally further modules for generating turbulators, embossments, for flanging and separating are arranged on a common, traversed by a sheet metal strip column frame whose plates in a periodic up and down movement with appropriately coordinated feed movement of the sheet metal strip are performed.
- FIG. 1 shows Sectional views of the deformed areas of the lamella during its processing in the column frame, wherein in a) a section through a turbulator is shown in b) an axial section through the punched hole with circumferential embossing, in c) an axial section through the slats with Collar and in d) an axial section through the blade with beaded collar; el) -e3) show the guidance of the process in three steps starting from a flat plate (not shown) before steps 3 and 4 according to the figures c) and d) according to an alternative embodiment with a central circumferential recess, the punching directly after the preferred step el); fl) -f3) shows the guidance of the process in three steps starting from a flat sheet (not shown) before steps 3 and 4 according to the figures c) and d) according
- Sectional views of the punching module wherein in a) a section through a region without guide column, in b) a section through a region with guide column and in c) a detail view in the region of the cutting gap is shown;
- FIG. 1 shows different views of a lamella for a heat exchanger in the different method steps, as they are to be described below.
- Figure la shows a longitudinal section through a turbulator as it is formed in a first step from a metal strip 1.
- These are essentially elongated recesses or beads (possibly with lateral slots) which are formed around the actual collar in order to increase the surface area and accordingly to increase the heat exchange.
- Figure Vo shows an axial section through the sheet after passing through the second station in the process, ie after in this second station on the one hand in the sheet 1 a punched opening 2 was generated with a diameter d3 and on the other hand at the same time an imprint in the sense of a depression 3 down.
- the recess 3 is an offset of a circumferential portion around the opening 2 of the sheet in a plane parallel to the original sheet metal plane.
- the outer diameter of this offset is indicated as d2 and the inner diameter as dl.
- the inner diameter dl is in the range of 20-22 mm
- the outer diameter d2 is in the range of 23-24 mm
- the inner diameter d3 of the aperture 2 is in the range of 11-12 mm.
- FIG. 1c shows an axial section through such a sheet in the region of a collar opening after passing through the third station.
- the actual collar is drawn in a direction opposite to the offset 3 on the other side of the sheet and deep-drawn over this, wherein a cylindrical collar 4 is formed with an upper edge 5.
- the inner diameter of this collar is shown in the figure as d4, typically this inner diameter is in the range of 18-19 mm in the context of the dimensioning indicated above.
- the height of such a collar is for example 3.9-4.6 mm and is marked in the figure lc with hl.
- a collar 4 which stands far on the opposite side.
- an axial section through such a collar opening is shown after passing through the fourth station.
- the collar 4 is crimped in the region of the upper edge 5 so that a flanged edge 7 is formed, over which the collar is circumferentially folded outward.
- the outer diameter D5 is typically in the range of about 21 mm in connection with the above-mentioned dimensions and results in the end of a height of the flared collar in the range of about 3.1 mm (marked h2 in Figure ld).
- This height h2 is at the end responsible for the spacing of the slats on the lines on which the slats are mounted.
- the downward offset 3 is not mandatory, but is for optimum rigidity and positioning of the slats on the lines of advantage.
- values for the height h 2 of the crimped collar in the range of approximately 3.1 mm can typically be achieved under the conditions specified here. Subsequently, some modified methods will be presented, with which this height can be extended to 3.6-3.8 mm, by cleverly carrying out the method so that these dimensions are possible without cracks or the like occurring in the most heavily loaded zones.
- FIGS. 1 e) -k Possibilities to lead the process a little more optimally in this respect are shown in FIGS. 1 e) -k).
- the height HI should be greater than the H2 discussed below. Typically it is at least 5% larger than the height H2, preferably at least 10%, in particular preferably at least 20% or 30% greater than the height H2.
- the result of this first preferred step is shown in a sectional view according to FIG. 1 el).
- the next step is the punching of the central punch opening 2, the result of this step being shown graphically in a sectional view in FIG. 1 e2).
- the steps e2) and e3) can also be accommodated combined in one tool stage.
- FIGS. 1 fl) -f 3 Another alternative process control is shown in FIGS. 1 fl) -f 3). This process is in principle analogous to that according to the representations el) - e3), but the punching of the central hole 2 takes place here only after the second forming step, i. Preference (result thereof according to Figure 1 fl) is followed by the second forming step (result thereof according to Figure lf2), and only then the central punch opening 2 is formed.
- the stages f2) and f3) can also be accommodated combined in one tool stage.
- variant e lies in the possibility of being able to form smaller radii
- variant f further increases the risk of cracks in the collar region reduced or the production of higher collars allows.
- a bulge 48 can still be introduced there together with the recess 41, where later that pre-hole 2 is introduced for the rolling of the collar (see FIG. This modification also favors the production of smaller radii of curvature.
- the material Due to the formation of the recess 41 in preference to some extent at the lowest point (lower vertex) of the circumferential recess 41, the material is thin. Due to the fact that in the subsequent forming step, pressure is applied precisely at this point, i. it is ensured that the thinnest point is no longer pulled but pressed, that the most uniform distribution of material in the formed region 49 can be achieved. The fact that not in the first step, the hole is produced, but the hole is produced only after the forming of the recess, can also be achieved that more material can be provided for the collar and correspondingly a higher collar height can be realized.
- FIG. 1 g Another embodiment of the process control is shown in Figure 1 g).
- the configuration of the process steps for achieving a starting position for the steps 3 or 4 according to FIGS. 1 c) or d) is carried out in such a way that, starting from a flat sheet metal (not shown in the starting situation), in a first preference in FIG a forming step, a circumferential shaft 46 in the final recess 3 opposite direction is formed in the sheet metal.
- This circumferential shaft 46 is circumferentially formed outside of the future molded portion 49, and is used, among other things, among other things, to move material from radially outside into the future molded portion 49, as much material as possible for the formation of the highest possible collar to the right place to provide.
- a circumferential wave 46 is formed in the direction opposite to the future depression 3, with this wave 46 having a diameter about its axis of symmetry 43 at its vertex This is larger than the diameter D2 of the final circumferential recess 41, which serves as a starting point for carrying out the steps for the production of the collar.
- the diameter Dl is typically at least 5%, preferably at least 10%, or 15%, or even 20% larger than the diameter D2.
- either the central punch opening 2 can now be produced as shown in FIG. 1 g2) and subsequently in another Forming step, the actual recess 3 are formed.
- the result of this step is then the situation according to FIG. 1 g3).
- a diameter D2 is generated at the lowest point of the circumferential recess 41.
- the steps according to FIGS. 1 c) and d) are then carried out for the production of the collar and the beading edge.
- the steps gl) and g3) can also be accommodated combined in one tool stage.
- FIG. 1 h An alternative process control is shown in Figure 1 h), here is only punched when the recess 3 is already formed.
- the stages h2) and h3) can also be accommodated combined in one tool stage here.
- a "shaft" 46 is pulled into the metal sheet, which is turned over in such a way that it forms the appropriate contour before the collar rolls.
- the diameter Dl should be greater than the final diameter D2.
- variant g) lies in the possibility of being able to form smaller radii, while variant h) further reduces the risk of cracks in the collar region or enables the production of higher collars.
- variants e) and f) are generally easier to implement in the tool, while the variants g) and h) offer the advantage that the thickness distribution of the material in the "Shaped" area 49 is even more uniform (see Figure 1 1).
- the additional collar height can be increased by a further 0.3 mm to 0.4 mm by the additional use of these methods according to FIGS. E) -k).
- the shaft 46 or the circumferential recess 41 before or after the punching of the turbulators are introduced.
- the formation of the turbulators can be done not only, as shown below, before the collars are formed in the same station, but also, for example, in an upstream separate station or in a downstream station, it is also possible
- FIG. 2 shows an overall tool for producing such slats in an open representation.
- a sheet-metal strip is introduced into such a processing unit in the conveying direction shown schematically by an arrow 12.
- a plurality of stations is arranged on a pillar frame, the pillar frame comprises an upper base plate 8 and a lower base plate 9, which are mounted relative to one another via columns 10 which engage in and guided in corresponding guide sleeves, relative to each other.
- the two plates 8 resp. 9 are periodically moved up and down in the machining process and in each case when the two plates 8, 9 are separated, the sheet-metal strip is moved in a coordinated manner one unit to the right and thus subjected to a next processing step.
- processing step 1 turbulators are punched out of the sheet metal strip, respectively. formed.
- the result of this processing step is a variety of turbulators, as shown in Figure la.
- the openings described above and shown in Figure lb are punched and at the same time the recess 3 is embossed.
- the individual components of this module will be described in more detail below.
- a punch holding plate 16 and movably mounted on this a Abstreiferplatte 15 are arranged.
- the punch holder plate 16 four outside the sheet metal strip arranged guide columns 17 are fixed, which pass through the stripper plate 15 and keep them movable.
- a module block 13 of the punching module is mounted and on this the die holding plate 14. In the die holding plate, respectively. In the module block 13 guide openings 18 are provided for the direct relative positioning of punch holding plate 16 and die holding plate.
- the third processing station is followed by the region 3, in which the actual collar is formed in a rolling deep-drawing process or ironing process; the final result is the structure as shown in FIG. 1c.
- the Roilierstempel 26 penetrate through said opening 2 and deform the edge region in a cold thermoforming process to collar 4. During this penetration movement rotate the Roilierstempel 26 several times around its own axis, so that the collar is formed as gently as possible.
- the rolling dies rotate at least twice completely about their own axis, typically on the order of 3 times about their own axis.
- the fourth region follows, in which the collar formed in the third region is crimped in the upper edge region, i. circumferentially outwards in a plane parallel to the sheet plane is folded.
- the result is a plurality of openings, as indicated in Figure ld in a sectional view.
- the processed sheet-metal strip is longitudinally separated by corresponding punching elements, in the following region 6 is advanced and in the final region 7 is separated transversely.
- the starvz module shown in FIG. 2a has four guide columns 18.
- a punching module is shown in a slightly modified form, here The punching module has two guide columns, one on each side of the guided sheet metal strip.
- FIG. 1 b in which the closed tool situation is shown on the left side and the open tool situation on the right side, it can be recognized how the lower module block 13 of the punching module is followed from bottom to top by the die holding plate 14 this Matrizenhalteplatte receiving 19 and cutting bush 20 are arranged, as will be explained with reference to Figure 3 below.
- the punch holder plate 16 in which punch 22 and sleeve 23 are arranged (also explained in detail below in connection with Figure 3), followed by the Abstreifeiplatte 15.
- the circular punched discharged in this construction by arranged in the die support plate 14 and immediately below in the lower module block 13 ejection openings 36 down.
- These ejection openings can be provided with suction means from below in order to safely remove the punched items from the process. But so that the diecuts but can not stick to the bottom of the punch 22, also has the punch each have a central bore 37. These central holes are supplied with periodically or permanently controlled compressed air. This can be recognized in particular in the plan view of the upper part of the tool according to FIG.
- the compressed air is introduced from both sides in each case via a compressed air connection 38 into a system of compressed air lines 39 which supplies in each case half of the tool. These blow the punched pieces coordinated with the lifting movement down from the punch through the openings 36.
- a compressed air connection 38 into a system of compressed air lines 39 which supplies in each case half of the tool.
- the punching module has only two laterally arranged guide columns 17, as can be recognized in the figures b1 and b2. These two guide columns engage in corresponding recesses 18, as can be seen in particular in Figure 2 b3, a. Accordingly, in this construction, as can be seen in particular from FIG. 2 b4, there are only the two laterally arranged guide columns 17 as guide elements for the tools. On the basis of Figure 2 b4 can also be recognized as the stripper plate 15 laterally arranged by guide elements 40 of the punch plate 16, respectively. top Module block 13 'is guided.
- FIG. 3 are detailed sectional views through the punching module, i. represented by the area 2 described above.
- a sectional view can be seen through the punching areas, in particular that a module block 13 of the punching module is first arranged on the lower base plate 9 in this area.
- the Matrizenhai teplatte 14 is arranged, it is not fixedly mounted on this module block 13, but arranged floating on this.
- a clamping piece 19 for the actual die 20 is first arranged at defined positions, this clamping piece 19 is a circular element, on the inside of which the actual die 20 is arranged and clamped in this.
- the elements 19 and 20 are fixedly connected to the die holding plate and immovable relative to each other.
- the upper top of the die 20 is offset relative to the top of the clamping piece 19 down and the corresponding circumferential inner edge of the clamping piece 19 is slightly rounded. This offset leads to the formation of the above-described embossing in the area of the punch opening.
- a punch holder plate 16 On the upper module block 13 'is first seen from top to bottom, a punch holder plate 16 is attached. Their attachment will be described in more detail below in connection with Figure 3b.
- the punch holder plate 16 in turn carries firmly attached thereto
- Crugemanschetten 23 which are formed as cylindrical elements, in whose cylindrical interior, the actual punch 22 are mounted.
- the front edge of the punches 22 are beyond the front edge region of the embossing sleeve 23 addition.
- Punch 22 and embossing sleeve 23 are also fixed in their relative position.
- a stripper plate 15 is arranged, which has circumferentially adjacent to the embossing sleeve 23 via a downwardly directed flange in the form of a scraper 24.
- this scraper plate 15 remains in the lower position and in contact with the sheet, so that the punch holder plate 16, punch 22 and embossing sleeve 23 can move up and out of the sheet independently of each other so that the sheet is separated from the punch and then free for the feed.
- the punching tool additionally has guide elements in the form of guide columns 17. These guide columns are on Positionierangsnülsen resp. Cylinder sleeves 25 firmly fixed in the punch plate 16. The Scraper plate 15 is movable on these guide columns 17. The Matrizenhalteplatte 14 has effetshülseri resp. Positioning sleeves 25 and provides a guide opening 18 for the guide column 17 is available. The die holding plate is floating on the top of the punching module 13, accordingly, the positioning of the die holding plate 14 by the guide columns 17 is determined.
- the punch plate 16 is not fixed to the upper module block 13 ', but rather floating, so that regardless of the relative position of the upper Modulblockl3' and lower base plate 9, respectively.
- Module block 13 of the column frame the relative position of Matrizenhalteplatte 14 and punch holder plate 16 is highly precisely defined by the guide columns 17. Accordingly, also results in an extremely high precision of the actual cutting gap in the stamping process and, accordingly, the punching process can be formed homogeneously distributed around the circumference of the opening under optimal balance of work hardening and non-smooth-cut portion.
- the cutting gap is typically in the range of 0.025 mm (shown in Figure 3c as D7). While the tolerance of such a device without said guide columns 17 in the range of about +/- 10 microns, can be reduced by the described locking of the two tool parts, this tolerance to at most +/- 5 microns. This corresponds to an increase in the precision in the cutting gap of almost 50 percent to about 20 percent, and accordingly, an optimal design of the cutting edge can be ensured in the stamping process.
- FIG 4 shows in A a Roilierstempel 26, as he finds in connection with the third processing station application.
- the roller die 26 has a shaft 28 which rotatably supports the roller die and which allows a corresponding tool to typically rotate this roller die 26 three times about its axis during the deep drawing motion.
- five Rollierkugel 27 are arranged distributed symmetrically around the circumference. These rolling balls typically have a diameter (d9) of about 5.5-5.7 mm.
- the outer diameter of the outer contour lines of the five rolling balls (dl 1) corresponds to the inner diameter of the collar produced.
- abutment point 30 for the distancing of ejection and to protect the Rollierkugeln.
- a rolling die 26 interacts with a die 31 as shown in FIG. 4c is shown.
- the inner diameter dl 2 of this die 31 is selected such that typically, as shown in detail in detail in FIG. 4d detail B, larger than the outer diameter of the Roilierstempels and the corresponding material thickness of the sheet 1, so that between the metal collar 4 and the tool 31 of the die remains a game (shown in Figure 4d with dl 3).
- This game is typically in the range of a little less than 0.01mm or less than 0.1mm.
- FIG. 5 shows the curling punch 32 used in the fourth processing station. It has a shaft 34 with a large diameter dl 6 and an insertion region or tip region 33 with a smaller diameter.
- the tip region is chamfered at the tip and merges into the shaft region in a crimping curve 35 in the shaft.
- This crimping stamp penetrates into the collar with the tip region 33 and, in the region of the radius R, forms the upper edge of this collar, so that subsequently a structure results, as shown in FIG. 2d.
- Sheet metal 23 embossing sleeve, bush
- Module block punching module 38 Compressed air connection below 39 Compressed air lines
- Stamp holder plate 44 transition region from 41 to
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Abstract
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112011100980T DE112011100980A5 (de) | 2010-03-23 | 2011-03-18 | Verfahren zur Herstellung von Lamellen für Wärmetauscher und Vorrichtung zur Durchführung dieses Verfahrens |
| HU1200738A HU229897B1 (en) | 2010-03-23 | 2011-03-18 | Process for producing fins for heat exhangers and apparatus for carrying out this process |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10157295 | 2010-03-23 | ||
| EP10157295.6 | 2010-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011117147A1 true WO2011117147A1 (de) | 2011-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2011/054105 Ceased WO2011117147A1 (de) | 2010-03-23 | 2011-03-18 | Verfahren zur herstellung von lamellen für wärmeaustauscher und vorrichtung zur durchführung dieses verfahrens |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE112011100980A5 (de) |
| HU (1) | HU229897B1 (de) |
| WO (1) | WO2011117147A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199274A (zh) * | 2017-05-09 | 2017-09-26 | 柳州申通汽车科技有限公司 | 加工汽车空调冷凝器芯体的装置 |
| CN117505711A (zh) * | 2024-01-08 | 2024-02-06 | 扬州威特科技有限公司 | 一种散热器翅片冲压成型机 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344816B (zh) * | 2015-11-20 | 2018-02-02 | 无锡国誉精密机械有限公司 | 空调翅片模具 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB307214A (en) * | 1928-03-08 | 1929-03-07 | Karmazin John | An improved radiator forming machine |
| US3367164A (en) * | 1966-03-03 | 1968-02-06 | Burr Oak Tool & Gauge | Method of forming sheet metal and apparatus therefor |
| CH500783A (de) | 1968-12-27 | 1970-12-31 | Styner & Bienz Ag | Verfahren zur Herstellung von Lamellen für Wärmeaustauscher und Vorrichtung zur Durchführung dieses Verfahrens |
| US4184355A (en) * | 1974-09-11 | 1980-01-22 | Hidaka Engineering Co., Ltd. | Method and a punch/die assembly for the production of heat exchanger fins |
| US5501092A (en) * | 1993-07-14 | 1996-03-26 | Hidaka Seiki Kabushiki Kaisha | Die-punch machine |
-
2011
- 2011-03-18 DE DE112011100980T patent/DE112011100980A5/de not_active Withdrawn
- 2011-03-18 WO PCT/EP2011/054105 patent/WO2011117147A1/de not_active Ceased
- 2011-03-18 HU HU1200738A patent/HU229897B1/hu not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB307214A (en) * | 1928-03-08 | 1929-03-07 | Karmazin John | An improved radiator forming machine |
| US3367164A (en) * | 1966-03-03 | 1968-02-06 | Burr Oak Tool & Gauge | Method of forming sheet metal and apparatus therefor |
| CH500783A (de) | 1968-12-27 | 1970-12-31 | Styner & Bienz Ag | Verfahren zur Herstellung von Lamellen für Wärmeaustauscher und Vorrichtung zur Durchführung dieses Verfahrens |
| US4184355A (en) * | 1974-09-11 | 1980-01-22 | Hidaka Engineering Co., Ltd. | Method and a punch/die assembly for the production of heat exchanger fins |
| US5501092A (en) * | 1993-07-14 | 1996-03-26 | Hidaka Seiki Kabushiki Kaisha | Die-punch machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199274A (zh) * | 2017-05-09 | 2017-09-26 | 柳州申通汽车科技有限公司 | 加工汽车空调冷凝器芯体的装置 |
| CN117505711A (zh) * | 2024-01-08 | 2024-02-06 | 扬州威特科技有限公司 | 一种散热器翅片冲压成型机 |
| CN117505711B (zh) * | 2024-01-08 | 2024-03-15 | 扬州威特科技有限公司 | 一种散热器翅片冲压成型机 |
Also Published As
| Publication number | Publication date |
|---|---|
| HU229897B1 (en) | 2014-12-29 |
| DE112011100980A5 (de) | 2013-04-11 |
| HUP1200738A2 (en) | 2013-04-29 |
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