WO1995020461A1 - Die and punch for forming a joint therebetween - Google Patents
Die and punch for forming a joint therebetween Download PDFInfo
- Publication number
- WO1995020461A1 WO1995020461A1 PCT/US1994/008569 US9408569W WO9520461A1 WO 1995020461 A1 WO1995020461 A1 WO 1995020461A1 US 9408569 W US9408569 W US 9408569W WO 9520461 A1 WO9520461 A1 WO 9520461A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- die
- anvil
- shield
- joint
- blades
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/02—Riveting procedures
- B21J15/025—Setting self-piercing rivets
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
- B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53709—Overedge assembling means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53996—Means to assemble or disassemble by deforming
Definitions
- This invention relates generally to a joint forming apparatus and specifically to a die and punch for forming a joint between sheets of material.
- Patent 3,730,044 entitled “Fluid Operated Apparatus” which issued to the inventor of the present invention on May 1, 1973, and is incorporated by reference herewithin.
- the punch and die tends to bow outward from their desired longitudinal axis during formation of a joint therebetween. Therefore, the edges of the punch and die anvil are highly stressed and may be prematurely worn or fracture.
- the preferred embodiment of a die and punch assembly is employed to form a joint between at least two sheets of material.
- the preferred embodiment die has a shield surrounding an anvil. This shield has at least one aperture extending therethrough.
- a canted coil spring expandably retains at least three die blades between the shield and the anvil.
- the shield is snappably engagable with a die body.
- an upper edge of at least one die blade is substantially coplanar with an upper edge of the shield prior to a joint being formed thereagainst.
- either the anvil, punch, or both has a frusto conical taper disposed along a peripheral edge thereof.
- an external surface of a stripper has substantially the same diameter as does an outside surface of the shield.
- the die and punch assembly of the present invention are advantageous over conventional devices in that an aperture in the present invention die shield allows for self-cleaning during operation.
- the present invention die shield and blades are also advantageous by having substantially coplanar upper edges so as to provide additional sheet material support during joint formation.
- Another advantage of the present invention is that the frusto conical taper on the punch, anvil, or both peripheral edge prevents high stress concentrations and improves the tool life.
- the snap together construction of the shield and die body allows for easy and low cost assembly and processing while achieving more uniform tolerances during heat treating. Additional advantage and features of the present invention will become apparent from the following description and appended claims, taken in conjunction with the accompanying drawings.
- FIG. 1 is a diagrammatic side elevational view, partially in section, showing a toggle press employing a preferred embodiment of a punch assembly and a die of the present invention
- FIG. 2 is a front elevational view, partially in section, showing the preferred embodiment punch assembly of the present invention in its retracted position relative to the preferred embodiment die of the present invention of FIG. 1 ;
- FIG. 3 is a front elevational view, partially in section, showing the preferred embodiment punch assembly of the present invention in its advanced position relative to the preferred embodiment die of the present invention of FIG. 1 ;
- FIG. 4 is an enlarged front elevational view, partially in section, showing a joint created by the preferred embodiment punch assembly and die of the present invention of FIG. 1 ;
- FIG. 5 is an enlarged top elevational view, with portions broken away therefrom, showing the preferred embodiment die of the present invention of FIG. 1 ;
- FIG. 6 is a side elevational view showing a preferred embodiment shield used in the die of the present invention of FIG. 1 ;
- FIG.7 is a fragmentary side elevational view showing the preferred embodiment shield used in the die of the present invention of FIG. 6;
- FIG. 8 is a side elevational view showing an alternate embodiment shield used in the present invention die of FIG. 1 ;
- FIG. 9 is a side elevational view showing a preferred embodiment die body used in the present invention die of FIG. 1 ;
- FIG. 10 is a top elevational view of the preferred embodiment body used in the present invention die of FIG. 9;
- FIG. 11 is an enlarged cross sectional view showing a frusto conical taper disposed on a punch of the present invention of FIG. 4; and
- FIG. 12 is an enlarged cross sectional view showing a frusto conical taper disposed on an anvil of the present invention of FIG. 4.
- a toggle press 20 is diagrammatically shown employing the preferred embodiment of a punch assembly 22 and a die 24 of the present invention.
- Such C-shaped toggle presses are well known within the art.
- punch assembly 22 compressibly deforms a joint against die 24
- punch assembly 22 and die 24 tend to bow outwardly with the press frame.
- Such an outward bow is shown in an exaggerated form by the phantom lines.
- this undesired bowing creates high stress loading on the peripheral contact edges of a die anvil and a punch.
- other traditional presses such as hydraulic in-line presses or an accordion-type toggle press, could be employed with the punch assembly and die of the present invention.
- punch assembly 22 includes a punch holder 30, a punch 32, a housing 34, a compression spring 36 and a stripper 38.
- die assembly 24 includes a die body 50 having an anvil 52 integral therewith, a shield or guard 54, three movable die blades 56, a canted coil spring 58, a dowl 60 and a bolt 62. At least two sheets of deformable material 70 and 72 are formed between punch assembly 22 and die 24 so as to create a leakproof interlocking joint 74. While three expandably movable die blades 56 are preferably disclosed herein, it should also be appreciated that a single stationary die blade may be disposed around anvil 52 with a trough therebetween.
- An elastomeric band, compression spring or leaf spring may alternately be employed to retain movable die blades 56 within die 24.
- a LANCE-N-LOC ® joint, an embossment, a bending operation or other such action may also be performed within the punch assembly and die of the present invention.
- each die blade 56 has an upper edge 90 which is substantially coplanar with an upper edge 92 of shield 54 prior to joint 74 being formed within die 24.
- This coplanar nature of the upper edges of die blades 56 (when in their nominal positions) and shield 54 provides for improved support of material sheets 70 and 72 during joint formation and removal from die 24.
- Materials sheets 70 and 72 are preferably steel or aluminum but may also be any other deformable material and may further be of varying thicknesses.
- Stripper 34 is defined by an external surface 100 which has substantially the same diameter as does an outside cylindrical surface 102 of shield 54. This substantially identical diameter of stripper 34 and shield 54 provides for improved stripping action efficiency and uniform stripping action therebetween.
- shield 54 includes six slot shaped apertures 120 which are open toward a bottom edge 122 thereof. These slotted apertures 120 allow for self cleaning of die 24. Such self cleaning is achieved during normal movement of die blades 56 and canted spring 58. Accordingly, any lubricating or cooling fluid as well as dirt, sheet material oil and other debris may be expelled through slotted apertures 120.
- An alternate embodiment design of shield 54 is shown in FIG. 8. This alternate embodiment includes six evenly spaced apertures 120 each having a circular shape.
- FIGS. 4, 7, 9 and 10 show shield 54 further having an inside surface 200 defined by a nominal segment 202, a spring retaining depressed segment 204 and a protruding ridged snap fit segment 206.
- Die body 50 includes a substantially cylindrical die foot 220 and anvil 52.
- a circumferential snap fit groove 222 is also disposed around a peripheral portion of die body 50.
- Groove 222 of die body 50 is designed to snappably receive protruding segment 206 of shield 54.
- shield 54 can be snap fittably attached to die body 50 by use of an arbor press applying approximately 40 foot pounds of force therebetween.
- the groove and protruding snap fit means may be reversed or may take on flexible beam and barb configurations.
- Both shield 54 and die body 50 are made from M2 steel which are hardened and ground to Re 57-61.
- shield 54 and die body 50 provide for processing efficiencies and improved tolerances between parts.
- Shield 54 and die body 50 are first individually machined to their desired shapes. Second, shield 54 is snapped onto die body 50. Third, the combined parts are heat treated and then burnished in a slurry of granite and water to remove burrs. A titanium nitride coating is then applied to the combined parts. Thereafter, canted coil spring 58 is inserted around die blades 56 and then the die blade and spring combination are installed within shield 54.
- the present invention provides for a frusto conical taper 300 of 5° as measured from a plane defined by a contact surface 302 of punch 32.
- This taper 300 intersects with a radius of 0.010 inches disposed along a peripheral contact edge 304 of punch 32.
- FIG. 11 illustrates a frusto conical taper 300 of 5° as measured from a plane defined by a contact surface 302 of punch 32.
- This taper 300 intersects with a radius of 0.010 inches disposed along a peripheral contact edge 304 of punch 32.
- B is the lateral dimension of the taper.
- the tapers of FIGS. 11 and 12 serve to reduce stress concentrations along the corners of the anvil and punch during any misalignment and bowing that occurs during joint formation (as is shown in phantom). Of course, other angles may be employed for the tapers depending on the specific application.
- an anvil may be separately retained to a die body.
- a shield may be attached to a die body by set screws, welding or other such attachment means.
- a number of other polygonal or curved shapes may be used for the disclosed cleaning apertures within the shield.
- many other punch and stripper configurations may be employed in combination with the die of the present invention.
- Various materials and dimensions have been disclosed in an exemplary fashion, however, a variety of other materials and dimensions may of course be employed. It is intended by the following claims to cover these and any other departures from the disclosed embodiments which fall within the true spirit of this invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69430141T DE69430141T2 (en) | 1994-01-31 | 1994-07-29 | DIE AND STAMP FOR MAKING A JOINT |
JP7520028A JPH09508319A (en) | 1994-01-31 | 1994-07-29 | Dice and punches to form a bond therebetween |
AU76689/94A AU686229B2 (en) | 1994-01-31 | 1994-07-29 | Die and punch for forming a joint therebetween |
KR1019960703931A KR100286693B1 (en) | 1994-01-31 | 1994-07-29 | Die and punch for forming joints between sheet materials |
EP94927152A EP0742746B1 (en) | 1994-01-31 | 1994-07-29 | Die and punch for forming a joint therebetween |
CA002180833A CA2180833C (en) | 1994-01-31 | 1994-07-29 | Die and punch for forming a joint therebetween |
US08/687,352 US5727302A (en) | 1994-01-31 | 1994-07-29 | Die and punch for forming a joint and method of making the die |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/189,580 US5479687A (en) | 1994-01-31 | 1994-01-31 | Apparatus for joining sheets of material |
US08/189,580 | 1994-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995020461A1 true WO1995020461A1 (en) | 1995-08-03 |
Family
ID=22697936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1994/008569 WO1995020461A1 (en) | 1994-01-31 | 1994-07-29 | Die and punch for forming a joint therebetween |
Country Status (9)
Country | Link |
---|---|
US (2) | US5479687A (en) |
EP (1) | EP0742746B1 (en) |
JP (1) | JPH09508319A (en) |
KR (1) | KR100286693B1 (en) |
AU (1) | AU686229B2 (en) |
CA (1) | CA2180833C (en) |
DE (1) | DE69430141T2 (en) |
ES (1) | ES2171461T3 (en) |
WO (1) | WO1995020461A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6760963B2 (en) | 2000-11-28 | 2004-07-13 | Colin Maxwell Wade | Ductile material lance joiner |
CN112296195A (en) * | 2019-07-24 | 2021-02-02 | Btm有限责任公司 | Sheet metal joining apparatus with die assembly |
Families Citing this family (33)
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DE4211276C2 (en) * | 1992-04-03 | 1997-08-28 | Profil Verbindungstechnik Gmbh | Holding device for holding, guiding and releasing a part to be joined, e.g. a mother |
SE9301097D0 (en) * | 1993-03-31 | 1993-03-31 | Attexor Equipements Sa | A METHOD FOR JOINING TOGETHER TWO OR SEVERAL OVERLAYING SHEET FORMED MEMBERS, AN APPARATUS FOR CARRYING OUT SAID METHOD AND A JOINT RESULTING FROM SAID METHOD |
US5860315A (en) * | 1994-07-29 | 1999-01-19 | Etm Corporation | Device for securing tools |
US5782130A (en) * | 1997-01-27 | 1998-07-21 | Btm Corporation | Apparatus for retaining tools |
US6092270A (en) * | 1998-03-16 | 2000-07-25 | Btm Corporation | Die for forming a joint |
US20060180736A1 (en) * | 1998-04-30 | 2006-08-17 | Kandiah & Associates Sdn. Bhd. | Pre-cast concrete panels for construction of a building |
GB2334474B (en) * | 1999-05-19 | 2000-01-19 | Colin Maxwell Wade | Ductile material clinch joiner |
US6430795B1 (en) * | 2000-11-06 | 2002-08-13 | Btm Corporation | Composite urethane stripper for metal joining apparatus |
US6757951B2 (en) | 2000-11-06 | 2004-07-06 | Btm Corporation | Composite urethane stripper for metal joining apparatus |
US7150086B2 (en) * | 2001-04-04 | 2006-12-19 | Eugen Rapp | Tool that connects pieces through a process of riveting |
DE10238020A1 (en) * | 2001-08-23 | 2004-03-04 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Motor vehicle assembly |
US6785959B2 (en) * | 2002-08-15 | 2004-09-07 | Btm Corporation | Tool assembly employing a flexible retainer |
US7694399B2 (en) | 2005-03-04 | 2010-04-13 | Btm Corporation | Sheet fastening apparatus and method |
EP1922191B1 (en) * | 2005-08-08 | 2013-02-20 | David J. Moellering | Stripper unit for a punch retainer |
US7434314B2 (en) * | 2006-02-10 | 2008-10-14 | Virgil Morton | Tool and method for joining sidelapped joints of deck panels |
DE102006024112A1 (en) * | 2006-05-19 | 2007-11-22 | Eckold Gmbh & Co Kg | Die for mechanical joining |
US8650730B2 (en) * | 2009-02-23 | 2014-02-18 | Btm Corporation | Clinching tool |
ES2383776T3 (en) * | 2009-12-03 | 2012-06-26 | Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH | Method for joining metal and plastic parts |
DE102010020666B4 (en) * | 2010-05-17 | 2020-04-16 | Tox Pressotechnik Gmbh & Co. Kg | Die and tool for a riveting tool |
US8640321B2 (en) * | 2011-05-03 | 2014-02-04 | GM Global Technology Operations LLC | Clinching method and tool for performing the same |
CN103619504B (en) * | 2011-06-02 | 2016-12-28 | 株式会社青山制作所 | Method and device for fitting of fitting member |
US9956601B2 (en) | 2012-04-02 | 2018-05-01 | Dayton Progress Corporation | Pilot assembly having an integrated stripper that may be coaxial with a pilot |
CN103357960B (en) * | 2012-04-03 | 2016-03-09 | 清华大学 | Micro-grid cutter sweep |
CN103357738B (en) * | 2012-04-03 | 2015-07-01 | 清华大学 | Micro grid cutting method |
CN102896223B (en) * | 2012-09-28 | 2015-02-18 | 蚌埠市昊业滤清器有限公司 | Lower die structure with automatically-bouncing filter screw plate after punching |
US8667656B1 (en) | 2013-04-04 | 2014-03-11 | Nucor Corporation | Side lap seam attachment tool |
EP3065894A1 (en) * | 2013-11-04 | 2016-09-14 | Bollhoff Attexor SA | Tool for making joints of clinch type |
US9718157B2 (en) * | 2014-02-21 | 2017-08-01 | Ford Global Technologies, Llc | Expanding die for clinching and riveting operations |
US10328481B2 (en) | 2014-03-18 | 2019-06-25 | Btm Company Llc | Clinching punch and apparatus |
DE102015007553A1 (en) * | 2015-06-16 | 2016-12-22 | Eckold Gmbh & Co Kg | Die for a joining tool, in particular for clinching |
US10933478B2 (en) | 2017-02-12 | 2021-03-02 | Verco Decking Inc. | Decking tool |
US11446726B2 (en) | 2020-05-14 | 2022-09-20 | BTM Company, LLC | Metal fastening die assembly |
US11951524B2 (en) | 2020-08-25 | 2024-04-09 | Btm Company Llc | Adjustable joining machine |
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US2670885A (en) * | 1950-02-09 | 1954-03-02 | Chester S Allen | Plastic spout for liquid containers |
DE1452782A1 (en) * | 1964-05-20 | 1969-03-27 | Metal Box Co Ltd | Method and device for joining two ductile sheet metal parts without rivets |
SU1299699A1 (en) * | 1985-07-11 | 1987-03-30 | Всесоюзный Научно-Исследовательский Конструкторско-Технологический Институт Подшипниковой Промышленности | Method of producing races of radial thrust bearings |
JPS62148040A (en) * | 1985-12-24 | 1987-07-02 | Sanyo Kiko Kk | Joining device for metallic sheet |
JPS62148035A (en) * | 1985-12-24 | 1987-07-02 | Sanyo Kiko Kk | Joining device for metallic thin sheet |
DE3726392A1 (en) * | 1987-08-07 | 1989-02-16 | Kuka Schweissanlagen & Roboter | Method for connecting thin plates or plate sections resting on one another |
US4825525A (en) * | 1986-08-29 | 1989-05-02 | Obrecht Robert E | Clinching tool |
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US5150513A (en) * | 1980-09-08 | 1992-09-29 | Btm Corporation | Apparatus for joining sheet material |
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FR2704785B1 (en) * | 1993-05-04 | 1995-07-21 | Homax Ag | Improvements to tools for the realization of assembly points of sheets by cold creep. |
-
1994
- 1994-01-31 US US08/189,580 patent/US5479687A/en not_active Expired - Lifetime
- 1994-07-29 WO PCT/US1994/008569 patent/WO1995020461A1/en active IP Right Grant
- 1994-07-29 DE DE69430141T patent/DE69430141T2/en not_active Expired - Lifetime
- 1994-07-29 AU AU76689/94A patent/AU686229B2/en not_active Ceased
- 1994-07-29 JP JP7520028A patent/JPH09508319A/en active Pending
- 1994-07-29 KR KR1019960703931A patent/KR100286693B1/en not_active IP Right Cessation
- 1994-07-29 CA CA002180833A patent/CA2180833C/en not_active Expired - Lifetime
- 1994-07-29 EP EP94927152A patent/EP0742746B1/en not_active Expired - Lifetime
- 1994-07-29 ES ES94927152T patent/ES2171461T3/en not_active Expired - Lifetime
-
1995
- 1995-10-27 US US08/549,437 patent/US5709019A/en not_active Expired - Lifetime
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US2670885A (en) * | 1950-02-09 | 1954-03-02 | Chester S Allen | Plastic spout for liquid containers |
DE1452782A1 (en) * | 1964-05-20 | 1969-03-27 | Metal Box Co Ltd | Method and device for joining two ductile sheet metal parts without rivets |
US5150513A (en) * | 1980-09-08 | 1992-09-29 | Btm Corporation | Apparatus for joining sheet material |
SU1299699A1 (en) * | 1985-07-11 | 1987-03-30 | Всесоюзный Научно-Исследовательский Конструкторско-Технологический Институт Подшипниковой Промышленности | Method of producing races of radial thrust bearings |
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Non-Patent Citations (1)
Title |
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See also references of EP0742746A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6760963B2 (en) | 2000-11-28 | 2004-07-13 | Colin Maxwell Wade | Ductile material lance joiner |
CN112296195A (en) * | 2019-07-24 | 2021-02-02 | Btm有限责任公司 | Sheet metal joining apparatus with die assembly |
Also Published As
Publication number | Publication date |
---|---|
EP0742746A4 (en) | 1998-03-04 |
US5479687A (en) | 1996-01-02 |
DE69430141T2 (en) | 2002-08-22 |
DE69430141D1 (en) | 2002-04-18 |
CA2180833C (en) | 2004-09-14 |
ES2171461T3 (en) | 2002-09-16 |
AU686229B2 (en) | 1998-02-05 |
US5709019A (en) | 1998-01-20 |
EP0742746B1 (en) | 2002-03-13 |
KR100286693B1 (en) | 2001-04-16 |
EP0742746A1 (en) | 1996-11-20 |
AU7668994A (en) | 1995-08-15 |
CA2180833A1 (en) | 1995-08-03 |
JPH09508319A (en) | 1997-08-26 |
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