GB2229123A - Die for sheet presswork - Google Patents
Die for sheet presswork Download PDFInfo
- Publication number
- GB2229123A GB2229123A GB9001601A GB9001601A GB2229123A GB 2229123 A GB2229123 A GB 2229123A GB 9001601 A GB9001601 A GB 9001601A GB 9001601 A GB9001601 A GB 9001601A GB 2229123 A GB2229123 A GB 2229123A
- Authority
- GB
- United Kingdom
- Prior art keywords
- die
- layer
- workface
- polymeric material
- extending bars
- 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.)
- Withdrawn
Links
- 239000000945 filler Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 20
- 238000010276 construction Methods 0.000 description 3
- 230000001010 compromised effect Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013047 polymeric layer Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- 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
- B21D37/01—Selection of materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
- B29K2709/06—Concrete
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
DIE POR SHEET PRESSWORK The invention relates to the metal pressworking
and to the presswork tooling and, more specifically, it is concerned with dies for sheet presswork.
The invention may be Tost effectively used in the manufacture of parts for cars and trucks, tractors, and the like from plate rolled stock.
Existing types of dies having polymeric and other - fillers do not allow a long life to be achieved in stamping small batches of parts from plate rolled stock with minimum working time and cost because of eventual disintegration of concrete filler as a result of high stresses in the filler, the safety of the die in operat ion being also compromised.
Known in-the art-is a die (cf. Yu.P.Kondratiev.
Production Tooling from Metals and Plastics. 1963. Gosu darstvennoe sojuznoe izdatelstvo sudostroitelnoi pro myshlennosti -(Leningrad), PP.144-145), comprisinga fe male die and a male die, each comprising a hollow body having a base and a workface. The body contains a filler, and the workface formed by a layer of a polymeric material.
During the pressworking, the load deforming parts is fully taken up by the filler so as to give rise to high stresses in the concrete filler (especially local stresses in case of eventual misalignments of the male die with respect to the female die) which results in the filler being crushed so that life of the die be- comes shorter and safety of the die in operation is compromised.
Known in the art is a die (cf. V.T.Mescherin. Catalog of Diagrams "Sheet PressworkIl. 1975. Mashinostroenie Publishers (Moscow), Fig. 279), comprising a male -die, a blankholder and a female die, each being in the form of a hollow body having a base and a workface. Each body accommodates reinforcement and a filler. The workface is formed by a layer of a polymeric material.
During stamping of a part, the filler is compress- ed, and stresses arise which result in a gradual or sudden crushing of the filler (upon eventual misalignments of the male die with respect to the female die) so as to make the die life shorter and compromise its safety in operation.
It is an object of the invention to prolong the die life and enhance its safety in operation.
This object is accomplished by that in a die for sheet presswork, comprising a male die, a blankholder and a female die, each being in the form of a hollow bndy having a base and a workface formed by a layer of a polymeric material and each containing reinforcement and a filler, according to the invention, the reinforcement is in the form of a three-dimensional-array made up of horizontally extending bars secured to each body and vertically extending bars secured to each base, the layer of a polymeric material being reinforced by reinforcing members rigidly connected to the horizontally j - 'A - extending bars and placed in the layer of a polymeric material, a space being defined between the filler and each base.
With a die so constructed, the load arising during pressworking is transmitted through the polymeric layer of the workfaces of the male die, blankholder and female die to the filler and reinforcing members placed in the layer of a polymeric material and, via the abovementioned members. to the horizontally and vertically extending bars and further to the bodies and their bases, respectively.
Owing to the provision of a space between the filler and each base, the load taken up directly by the filler on the part of the polymeric layer is also trans- mitted to the horizontally and vertically extending bars and, via these bars, to the bodies and bases, as mentioned above. Therefore, in case of overloads of the die, critical stresses that might result in disintegration of the structure cannot arise in the die filler. 20 It is preferred that the vertically extending bars of the three- dimensional array be of a diameter which is greater than the diameter of the horizontally extending bars. This construction of the bars allows the main pressworking force to be transmitted directly through the vertically extending bars to the base with a lower specific load, It is preferred that each reinforcing member be in the form of a T-shaped metal structure having its leg attached at least to the points of intersection of the horizontally extending bars placed in the layer of a polymeric material and its cross-piece extending in paral- lel with the workface of the layer-of a polymeric material in the vicinity to said workface.
This construction ensures an increase in the surface area of the metal part of the die that takes up the major part of the direct load of the presswork so as to lower the force acting upon the filler, prolong the die life and enhance its safety in operation, respectively.
Other objects and advantages of the invention will become apparent from the description of an embodiment of the invention with reference to the accompanying drawing which schematically shows a die for sheet presswork in longitudinal section.
With reference to the drawing, a die for sheet presswork has a male die 1, a blankholder 2 and a fe- male die 3. The male die 1 is in the form of a hollow body 4 having a base 5 and a workface 6 formed by a layer of a-polymeric material.
The body 4 contains reinforcement 7 in the form of a three-dimensional array made up of horizontally ex- tending bars 8 welded to the body 4 and vertically extending bars 9 attached by-bolts 10 to the base 5. The vertically extending bars of the three-dimensional array are of a diameter which is larger than the diameter of the horizontally extending bars 8 since with such a choice of diameters specific loads on the base 5 during part stamping are lowered. The rigid attachment of the horizontally extending bars 8 to the body 4 provides optimum conditions for the transmission of loads from t,hese bars 8 to the body 4. The body 4 contains a filler ill which in this case is in the form of high-strength concrete, the polymeric rAterial being in the form of epoxy resin.
The layer of the polymeric material of the work- face 6 of the male die 1 is reinforced by reinfnreing members 12 in the form of any appropriate known structure, e.g. a net. In this embodiment, the reinforcing member 12 is in the form of a T-shaped metal structure having its leg 13 welded to the points of intersectinn of the horizontally extending bars 8 placed in the lay er of the polymeric material, and its crnss-piece 14 extending in parallel with the workface 6 in the.vicini ty to said workface 6.
The provision of the reinforcing members 12 in the layer of the polymeric material creates a rugged frame work for this layer; moreover the reinforcing members 12 take up the load arising during the presswork there by allowing the filler 11 to be relieved from these forces. The attachment of the leg 13 at the points of intersection of the horizontally extending bars 8 provides favourable conditions for the transfer of the load arising during pressworking to the reinfnrcement.
The leg 13 may be attached to the horizontally extending bars 8 not only at points of their intersection. but also in the area intermediate these pnints where it is necessary to ensure maximum Possible lowering of loads on the filler arising during pressworking. A space 15 is provided between the filler 11 and the base 5.
The construction of the blankholder 2 is similar to that of the male die 1. The blankholder 2 is in the form of a hollow body 16 having a base 17 and a workface 18 is in the form of a layer of a polymeric material. The workface 18 of the blankholders 2 is similar to the workface of the maledie and is in the form of an integral surface. The body 16 accommodates reinforce- ment 7 and the filler 11 similar to that used in the male die 1.
The layer of a polymeric material of the workface 18 of the blankholders 2 is reinforced similarly to the layer of the polymeric material of the workface 6 of the male die 1 by reinforcing members 12, each having its leg 13 welded to the points of intersection of the horizontally extending bars 8 in the layer of the polymeric material of the blankholder 2 and its cross-piece 14 extending in parallel with the workface 18 in the vicinity to the workface 18. A space 15 is defined between the filler 11 of the blankholder 2 and its base 17.
The female die 3 is constructed similarly to the male die 1 and blankholder 2. The female die 3 has a 9, hollow body 19 of a size corresponding to the size of the male die 1 and blankholder 2, a base 20 and a workface 21 made up by a layer of a polymeric material similarly to the workface 6 of the male die 1 and work- face 18 of the blankholder 2. The body 19 accommodates the reinforcement 7 and the filler 11 similar to that of the male die 1 and blank-holder 2.
The attachment of the vertically extending bars 9 of the reinforcement 7 to the bases 5, 17 and 20 of the male die 1, blankholder 2 and female die 3, respectively, ensures their integrity during assembly.
The layer of a polymeric material of the workface 21 of the female die 3 is reinforced similarly to the layer of the polymeric material of the workface 6 of the male die 1 and workface 18 of the blankholder 18 by reinforcing members 12 each having its leg 13 welded to the points of intersection of the horizontally extending bars 8 placed in the layer of the polymeric material of the female die 3 and its cross-piece 14 extending in parallel with the workface 21 in the vicinity to said workface 21. A space 15 is defined between the filler 11 of the female die 3 and its base 20.
The die for sheet presswork functions in the following manner.
- A.sheet blank is placed on the female die 3 of the open die. The blankholder 2 is then lowered until its workface 18 comes in touch with the blank, and the male die 1 is then deforms the blank to produce a finished -.- 8 - part 22. The pressworking force load is taken up by the layer of the polymeric material of the workfaces 6, 18 and 20 and is then transmitted to the reinforcing mem bers 12 and filler 11.
Forces from the reinforcing members are.transmit ted to the reinforcement 7 and, therefrom, to the bodies 49 16 and 19 and to their bases 5, 17 and 20, respective ly, through the vertically extending bars 9 the diameter of which is greater than the diameter of the horizontal bars 8.
Therefore, a decrease in the loads an the filler 11 lowers internal stresses therein so as to make its disintegration unlikely, hence, to prolong service life of the die. In addition, reliability in operation is enhanced, and safety of the die in operation is also improved.
J7
Claims (4)
1, A die for sheet presswork, comprising a male die, a blankholder and a female die each being ir. the form of a hollow body having a base and a workface formed by a layer of a polymeric material, each body accommodating reinforcement and a filler, the reinforcement being in the form of a three-dimensional array made up of horizontally extending bars secured in each body and vertically extending bars secured in each base, and the layer of a polymeric material being reinforced by reinforcing members rigidly connected to the horizontally extending bars placed in the layer of a polymeric material, a space being defined between the filler and each base.
2. A die for sheet presswork as claimed in Claim 1, wherein the vertically extending bars of -the three-dimensional array are of a diameter which is greater than the diameter of the horizontally extending bars.
3, A die for sheet presswork as claimed in Claim 1 or 2, wherein each reinforcing membr is in the fc?rm of a T-shaped metal structure having its leg attached at least to the points of intersen-tion of the horizontally extending bars placed in the layer of a polymeric naterial and its cross-piece extending in parallel with the workface of a layer of a polymeric material in the vicinity to said workface.
4. A die for sheet presswork as claimed in any of the foregoing Claims substantially as hereinabove described with reference to, and as shown in the accompany- ing drawings.
rw=non IW@UatThe Patent Office, State HOUBC.6671 High Holborn. loondon WC1R4TP. Further copies maybe obtainedfrom The Patent Office
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU894642981A SU1609533A1 (en) | 1989-01-30 | 1989-01-30 | Die for sheet forming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9001601D0 GB9001601D0 (en) | 1990-03-21 |
| GB2229123A true GB2229123A (en) | 1990-09-19 |
Family
ID=21425347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9001601A Withdrawn GB2229123A (en) | 1989-01-30 | 1990-01-24 | Die for sheet presswork |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPH02235532A (en) |
| CN (1) | CN1047044A (en) |
| DE (1) | DE4002528A1 (en) |
| FR (1) | FR2642341A1 (en) |
| GB (1) | GB2229123A (en) |
| IT (1) | IT9019176A1 (en) |
| SE (1) | SE9000304L (en) |
| SU (1) | SU1609533A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2250703A (en) * | 1990-12-12 | 1992-06-17 | Marrill Eng Co Ltd | Forming or cutting press tools |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9301488D0 (en) * | 1993-01-26 | 1993-03-17 | Metal Box Plc | Ram for long stroke press |
| JP2002336922A (en) * | 2001-05-16 | 2002-11-26 | Mitsubishi Motors Corp | Press forming die and method of manufacturing the same |
| CN100410002C (en) * | 2006-06-08 | 2008-08-13 | 胡敏灵 | Making process of thin wall stainless steel ring |
| DE102010060578A1 (en) * | 2010-11-16 | 2012-05-16 | Willi Lauber Gmbh | Tool half for a mold and method for its production |
| US9770749B2 (en) * | 2014-08-08 | 2017-09-26 | GM Global Technology Operations LLC | Hybrid stamping system |
| CN104760322B (en) * | 2015-03-25 | 2017-06-06 | 重庆平伟汽车科技股份有限公司 | One kind strengthens stamping die cantilever and manufacture method |
| CN104815908A (en) * | 2015-05-06 | 2015-08-05 | 翟述基 | Water cooling mold for high-strength steel plate stamping part thermal forming |
| CN105107911A (en) * | 2015-09-18 | 2015-12-02 | 芜湖日升重型机床有限公司 | Frequency converter used on numerical control machine tool |
| CN111745023B (en) * | 2020-07-18 | 2021-12-17 | 浙江双展精密机械股份有限公司 | Precision mold for automobile parts |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB822726A (en) * | 1955-04-29 | 1959-10-28 | Budd Co | A forming die, and its method of production |
| WO1982001674A1 (en) * | 1980-11-19 | 1982-05-27 | Andersen Arne | Tool for shaping articles |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR650878A (en) * | 1928-03-15 | 1929-02-12 | Improvements in the construction of dies intended for presses for drawing sheet metal by traction | |
| US1935916A (en) * | 1928-06-06 | 1933-11-21 | Budd Edward G Mfg Co | Metal die and method of making the same |
| GB789094A (en) * | 1954-06-24 | 1958-01-15 | Gen Motors Corp | Improvements relating to dies for sheet metal |
| US3034465A (en) * | 1958-11-28 | 1962-05-15 | Gen Motors Corp | Die |
| US3195341A (en) * | 1961-11-20 | 1965-07-20 | Nat Lead Co | Die apparatus |
| EP0237575A1 (en) * | 1985-09-11 | 1987-09-23 | Denki Kagaku Kogyo Kabushiki Kaisha | Mold assembly |
-
1989
- 1989-01-30 SU SU894642981A patent/SU1609533A1/en active
-
1990
- 1990-01-24 GB GB9001601A patent/GB2229123A/en not_active Withdrawn
- 1990-01-26 CN CN90100982.2A patent/CN1047044A/en active Pending
- 1990-01-29 FR FR9001001A patent/FR2642341A1/en not_active Withdrawn
- 1990-01-29 DE DE4002528A patent/DE4002528A1/en not_active Withdrawn
- 1990-01-29 SE SE9000304A patent/SE9000304L/en not_active Application Discontinuation
- 1990-01-29 IT IT019176A patent/IT9019176A1/en not_active Application Discontinuation
- 1990-01-30 JP JP2020369A patent/JPH02235532A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB822726A (en) * | 1955-04-29 | 1959-10-28 | Budd Co | A forming die, and its method of production |
| WO1982001674A1 (en) * | 1980-11-19 | 1982-05-27 | Andersen Arne | Tool for shaping articles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2250703A (en) * | 1990-12-12 | 1992-06-17 | Marrill Eng Co Ltd | Forming or cutting press tools |
| GB2250703B (en) * | 1990-12-12 | 1994-06-22 | Marrill Eng Co Ltd | Forming or cutting press tools |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1047044A (en) | 1990-11-21 |
| DE4002528A1 (en) | 1990-08-02 |
| FR2642341A1 (en) | 1990-08-03 |
| GB9001601D0 (en) | 1990-03-21 |
| SE9000304D0 (en) | 1990-01-29 |
| JPH02235532A (en) | 1990-09-18 |
| SE9000304L (en) | 1990-07-31 |
| IT9019176A1 (en) | 1990-07-31 |
| IT9019176A0 (en) | 1990-01-29 |
| SU1609533A1 (en) | 1990-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2229123A (en) | Die for sheet presswork | |
| Ahmetoglu et al. | Deep drawing of round cups from tailor-welded blanks | |
| US20030151273A1 (en) | Automobile strengthening member | |
| CN101259510A (en) | Stamping method for using high-strength steel plate to manufacture automobile rear bumper steel girder | |
| US3036373A (en) | Metal forming | |
| GB1582995A (en) | Die casting machine | |
| US5482454A (en) | C-type frame for die tightening units mounted for an injection molding machine | |
| US2857056A (en) | Coupling assembly | |
| US3835682A (en) | Hydraulic presses | |
| US5463892A (en) | Hydraulic press | |
| EP0744598A1 (en) | Weighing apparatus | |
| EP0955111A1 (en) | Integral structure of sheet material and cylindrical member and production method thereof | |
| EP0403065A2 (en) | Plastics tooling with compression adjustment | |
| CN214719911U (en) | Rib pressing die capable of preventing stress deformation | |
| CN213068516U (en) | Groove-fixed type anchoring fractured rock mass shear test device | |
| JP2007015543A (en) | Energy absorbing member and manufacturing method thereof | |
| CN106528928B (en) | A kind of wave is distributed emanant tank brevicone | |
| CN209736545U (en) | Machining die for spring baffle on high-speed train bogie | |
| Gerdeen | Development of a Computer Program" Axiform" for the Analysis of Forming of Axisymmetric Sheet Metal Parts.(Retroactive Coverage) | |
| CN2194895Y (en) | Multifunctional polyurethane buffer | |
| CN216002495U (en) | Front anti-collision beam assembly of passenger car | |
| CN221068001U (en) | Novel aluminum profile automobile anti-collision beam | |
| CN213006693U (en) | Press machine | |
| CN217751346U (en) | Automobile side wall inner plate station device | |
| JPH08276224A (en) | Die for forming tapered square tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |