EP2603335A1 - Verfahren und werkzeug zur herstellung eines vollstanznietes - Google Patents
Verfahren und werkzeug zur herstellung eines vollstanznietesInfo
- Publication number
- EP2603335A1 EP2603335A1 EP12740084.4A EP12740084A EP2603335A1 EP 2603335 A1 EP2603335 A1 EP 2603335A1 EP 12740084 A EP12740084 A EP 12740084A EP 2603335 A1 EP2603335 A1 EP 2603335A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- rivet
- die
- tool
- shaped pieces
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007787 solid Substances 0.000 title abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 abstract description 10
- 239000011159 matrix material Substances 0.000 abstract 1
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 238000004080 punching Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
- B21J13/025—Dies with parts moving along auxiliary lateral directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/58—Making machine elements rivets
Definitions
- the invention relates to a method for producing a solid punch rivet according to claim 1.
- the invention further relates to a tool for the production of a full punch rivet according to claim 7.
- Punch rivets of this type are placed through the workpieces, in particular in the automotive sector, via automated rivet setting devices (so-called rivet eyes), as disclosed, for example, in DE 10 2004 01 1 846 A1.
- rivet eyes automated rivet setting devices
- punch rivets are manufactured in the prior art by machining processes, in particular by means of turning.
- these methods prove to be very costly, which is partly due to the increased loss of material.
- DE 20 2009 017 846 U1 it is therefore proposed to produce a stamped embossing rivet using at least one pressing operation in cold forming technology.
- the invention aims to remedy this situation.
- the invention is the task
- the wire piece is pre-compressed prior to clamping in the die by means of a second tool, comprising a second die and a second punch.
- a second tool comprising a second die and a second punch.
- the pre-upset wire piece in the second die of the second tool is further advanced by means of the first punch, wherein at one end of the wire piece, a radially projecting head is formed.
- the further compressed wire piece between the radially engageable fittings of the die is positioned before it is clamped between the fittings, wherein the molded head rests axially on the fittings.
- the radially engageable fittings are conically guided axially and the fittings are moved axially by the first punch, whereby the piece of wire is clamped between the fittings. This achieves an integrated clamping and forming process.
- the present invention is further based on the object to provide a tool for producing a full punch rivet by means of the aforementioned method, so that a cost-effective production of a full punch rivet is made possible with constant dimensional accuracy. According to the invention, this object is achieved by a tool having the features of patent claim 7.
- a tool for producing a full punch rivet by means of the aforementioned method which allows a cost-effective production of a full punch rivet with constant dimensional accuracy.
- the peripheral shape of the tool is formed by at least three fittings, which are guided radially adjustable and together form the peripheral shape.
- the at least one undercut forming an annular groove causes a circumferential ridge of the solid punch rivet produced. This circumferential ridge in turn, together with the rivet foot, defines a circumferential groove into which the material of the sheet to be joined, which is plastically deformed during the punching process, penetrates.
- the fittings on spring elements in the direction of the largest cone diameter of the frame member Due to the bias of the fittings on spring elements in the direction of the largest cone diameter of the frame member are the fittings in unloaded state spaced from each other, such that a simple positioning of the piece of wire to be deformed is possible.
- the shaped pieces are subjected to an axial force, they are moved axially in the direction of the smallest cone diameter of the frame element, as a result of which the shaped pieces are set radially against the wire piece via the conical shape of the leadthrough. As a result, a clamping of the piece of wire between the fittings is achieved.
- the punch on an outer axially displaceable punch member which is penetrated coaxially by an inner axially displaceable pressure pin, wherein the outer punch member has a conical shoulder, which corresponds to the conical passage at its enlarged diameter end.
- the outer die member causes an axial movement of the mold pieces of the die, whereby a clamping of the piece of wire is achieved. Subsequently, a force is applied to the piece of wire via the inner pressure pin.
- the outer punch member is biased in the punch via a spring. As a result, a gentle, spring-loaded hiring of the outer punch part is made possible on the fittings.
- the inner pressure pin relative to the outer punch part can be positioned so that the two punch parts a receptacle for delimiting the head of a butted rivet.
- a gripper function is effected, which allows a transport of a pre-compressed rivet from a pre-upsetting matrice into the die of the tool.
- FIG. 3 shows the schematic representation of the shaped pieces of the die from FIG. 1
- Fig. 5 is a schematic representation of a deflected piece of wire
- the tool 1 chosen as an exemplary embodiment for producing a solid rivet is essentially formed by a die 2, which receives a fitting insert 3, and a punch 4.
- the die 2 consists essentially of a socket 21 which receives a fitting insert 3.
- the fitting insert 3 abuts against an intermediate sleeve 22, in which a pressure pin 23 is arranged.
- the pressure pin 23 is held by two thrust pin receptacles 231, between which a coil spring 25 is arranged.
- the pressure pin 23 abuts against a pressure piece 24, which is in communication with an ejector pin 29 and bears against a clamping screw 27 for adjusting the spring tension of the disk spring assembly 26.
- the clamping screw 27 in turn abuts a rear bearing 28, through which the ejector pin 29, which also penetrates the clamping screw 27, is guided.
- the intermediate sleeve 22 has a substantially T-shaped cross-section and is biased by a plate spring 6 against the fitting insert 3, which bears against the rear bearing 28.
- the molding insert 3 is formed by a substantially cylindrical retaining ring 31, which is provided with an axial, tapered passage 31 1. Surrounding each are offset by 90 degrees to each other in the retaining ring 31 four holes 312 introduced, which open into the passage 31 1.
- a rivet mold 32 is inserted, which is formed from four fittings 33.
- the rivet mold 32 defines a rivet peripheral contour 321, which has an annular groove 322 forming an undercut.
- the Niet societyskontur 321 includes the contour of the rivet head 323 and the Nietfußes 324.
- the punch 4 consists essentially of a cup-shaped socket 41, which is penetrated by an insert 42, wherein the insert 42 has a peripheral edge 420 which rests against the bottom edge 410 of the socket 41.
- the insert 42 is adjoined by an intermediate bushing 43 which receives a pressure pin 46, which opens into a bore 422 introduced axially through the insert 42.
- the pressure pin 46 is held in the intermediate sleeve 43 via a pressure pin receptacle 461, wherein between the pressure pin receptacle 461 and the insert 42 the pressure pin 46 surrounding a coil spring 47 is arranged, via which the insert 42 is biased against the socket 41.
- the pressure pin 46 is applied to a pressure piece 48, which in turn opens into a clamping screw 45.
- a disc spring assembly 44 is arranged, via which the intermediate bush 43 is biased against the insert 42.
- the bias is adjustable via the clamping screw 45, which in turn rests against the rear layer 39.
- the pre-upsetting tool 5 is formed from a second die 6 and a second punch 7.
- the second die 6 consists essentially of a socket 61, which receives a mold core 62 which is surrounded by a sleeve 63. Mold core 62 and Sleeve 63 abut against a support core 64, which receives a pressure piece 66 against which an ejector pin 65 abuts, which opens into the mold core 62.
- the mandrel 62 has the shape contour 621 of the wire piece 8 to be pre-clinched.
- Support core 64 and thrust piece 66 are applied to the rear layer 67, which is penetrated by an ejector pin 68 which bears against the pressure piece 66. At its end opposite the pressure piece 66, the ejector pin 68 is held in a receptacle 69.
- the second punch 7 of the pre-upsetting tool 5 consists essentially of a pre-upsetter 71, which receives a pressure piece 73, against which a pressure pin 72 abuts, which projects out of the pre-upsetter 71.
- the pressure member 73 is biased by a coil spring 74 against the pre-diver 71, which rests together with the pre-diver on a rear 75.
- a wire piece 8 is first cut to length, which is inserted into the second die 6 of the pre-upsetting tool 5 so that it rests on the ejector pin 68 in the mandrel 62. Subsequently, the second punch 7 is placed with the pre-upsetter 51 on the second die 6, wherein the pressure pin 72 rests on the wire piece 8. Subsequently, the wire piece 8 is acted upon by the pressure pin 52 in such an axial force that this is pre-dipped into the mold contour 621 of the mandrel 62. The shape of the pre-bent piece of wire 81 is shown in Figure 5 b).
- the second punch 7 is now removed from the second die 6 of the pre-upsetting tool 5 and the punch 4 of the tool 1 is positioned on the second die 6 of the pre-upsetting tool 5, so that the pressure pin 46 of the punch 4 rests on the preformed rivet 81. Subsequently, an axial force is applied to the pre-upset rivet 81 via the pressure pin 46, wherein the rivet head 831 is preformed.
- the shape of the thus pre-compressed wire piece 82 is shown in Figure 5 c).
- the thus pre-compressed wire piece 82 is now on the ejector pin 68 with its rivet head 831 in the bore 422 of the insert 42nd of the punch 4, wherein the pressure pin 46 is moved back within the punch 4.
- the pre-compressed wire piece 82 is now held in the formed by the bore 422 of the insert 42 and the pressure pin 46 recording.
- the pre-compressed wire piece 82 is subsequently positioned by means of the punch 4 between the shaped pieces 33 of the rivet mold 32.
- the conical shoulder 421 of the insert 42 is applied to the fittings 23 and pushes them against the spring force of the coil spring 25 along the conical feedthrough 31 1 in the direction of the intermediate sleeve 22 of the die 2, whereby the fittings 33 are radially applied to the pre-compressed piece of wire 82 ,
- the pre-formed wire piece 82 is clamped between the mold pieces 33, wherein the preformed rivet head 831 rests on the shaped pieces 33.
- the geometry of the underside of the preformed rivet head 831 corresponds to the geometry of the rivet head-side outlet of the rivet peripheral contour 321 formed by the shaped pieces 33 and rests on this.
- the punch 4 is now removed from the die 2, wherein the shaped pieces 33 are moved by the restoring force of the coil spring 25 via the pressure pin receptacle 231 along the conical feedthrough 31 1 of the retaining ring 31 upwards. As a result, the shaped pieces 33 are moved apart, whereby the finished Vollstanzniet 83 is released. The released Vollstanzniet 83 is now ejected via the pressure pin 23 from the die 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011110598A DE102011110598A1 (de) | 2011-08-18 | 2011-08-18 | Verfahren und Werkzeug zur Herstellung eines Vollstanznietes |
PCT/EP2012/062799 WO2013023831A1 (de) | 2011-08-18 | 2012-07-02 | Verfahren und werkzeug zur herstellung eines vollstanznietes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2603335A1 true EP2603335A1 (de) | 2013-06-19 |
EP2603335B1 EP2603335B1 (de) | 2013-10-16 |
Family
ID=46581917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12740084.4A Active EP2603335B1 (de) | 2011-08-18 | 2012-07-02 | Verfahren und werkzeug zur herstellung eines vollstanznietes |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2603335B1 (de) |
DE (1) | DE102011110598A1 (de) |
WO (1) | WO2013023831A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104057007B (zh) * | 2014-06-16 | 2017-01-18 | 沈阳飞机工业(集团)有限公司 | 半扁圆头、平锥头铆钉用硬质合金阴模及其加工方法 |
JP7034506B2 (ja) | 2020-07-03 | 2022-03-14 | 三豊機工株式会社 | 冷間圧造工具 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5296317A (en) * | 1992-09-03 | 1994-03-22 | Water Gremlin Co. | High torque battery terminal and method of making same |
DE102004011846A1 (de) | 2003-03-10 | 2004-09-23 | Tox Pressotechnik Gmbh & Co. Kg | Vorrichtung zur Zuführung von Hilfsfügeteilen |
DE102004004233C5 (de) * | 2004-01-27 | 2012-07-19 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Verfahren und Vorrichtung zur Herstellung einer Dehnschraube |
DE102004059638B3 (de) * | 2004-12-10 | 2006-08-03 | Hilti Ag | Vorrichtung und Verfahren zum Erzeugen einer Profilierung an einem Befestigungselement |
EP2218981A3 (de) | 2009-02-11 | 2011-04-06 | Bernhard Bauersachs | Montagekonstruktion |
DE102009052879B4 (de) * | 2009-11-13 | 2020-06-18 | Kerb-Konus-Vertriebs-Gmbh | Stanz-Prägeniet |
WO2011092014A1 (de) | 2010-01-27 | 2011-08-04 | Tox Pressotechnik Gmbh & Co. Kg | Verbindungselement und herstellungsverfahren für ein verbindungselement |
-
2011
- 2011-08-18 DE DE102011110598A patent/DE102011110598A1/de not_active Withdrawn
-
2012
- 2012-07-02 EP EP12740084.4A patent/EP2603335B1/de active Active
- 2012-07-02 WO PCT/EP2012/062799 patent/WO2013023831A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013023831A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102011110598A1 (de) | 2013-02-21 |
EP2603335B1 (de) | 2013-10-16 |
WO2013023831A1 (de) | 2013-02-21 |
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