CN102323167A - Sheet stamping surface damage test apparatus for realizing a plurality of deformation states - Google Patents
Sheet stamping surface damage test apparatus for realizing a plurality of deformation states Download PDFInfo
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- CN102323167A CN102323167A CN201110234426A CN201110234426A CN102323167A CN 102323167 A CN102323167 A CN 102323167A CN 201110234426 A CN201110234426 A CN 201110234426A CN 201110234426 A CN201110234426 A CN 201110234426A CN 102323167 A CN102323167 A CN 102323167A
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Abstract
The present invention discloses a sheet stamping surface damage test apparatus for realizing a plurality of deformation states, and belongs to the technical field of the sheet metal stamping and forming technology. The apparatus comprises: a stretching collet, an upper mold base, an upper mold insert block, an upper mold assistance block, a lower mold base, a lower mold insert block and a lower mold assistance block. The upper mold insert block is connected with the upper mold assistance block through pins. The upper mold assistance block is fixed on the upper mold base through bolts. The lower mold insert block is connected with the lower mold assistance block through pins. The lower mold assistance block is fixed on the lower mold base through bolts. An upper mold and a lower mold are connected to form the mold through bolts. The upper mold insert block surface is provided with a groove structure. With the groove structure, a plurality of deformation states are realized, wherein the deformation states comprise, a plurality of stretching-bending deformation states and compressing deformation states. With the present invention, the surface damage of the straight edge part under the stretching-bending condition can be simulated, wherein the straight edge part is the straight edge part of the advanced high strength steel sheet stamping component; the surface damage state of the mold corner part under the compressing condition can be simulated, wherein the mold corner part is the mold corner part of the advanced high strength steel sheet stamping component.
Description
Technical field
The present invention relates to the device in a kind of sheet metal stamp forming technology field, what be specifically related to is the sheet stamping surface damage test unit that can realize the various deformation state.
Background technology
Energy-saving and environmental protection, safety become three big themes of current development of automobile, make the light weight of automobile change into inevitable choice.And advanced high strength steel plate is with its good comprehensive mechanical property, integrates lightweight, good crashworthiness and economy, becomes the light-weighted preferred material of automobile, also is a research focus in the lightweight material.Advanced high-strength steel thin plate one of major obstacle when drawing is drip molding surface damage phenomenon to occur; This is because intensity rank raises; In forming process, need bigger pressure-pad-force, so steel plate/mold interface bears high contact pressure and shearing force, interface temperature raises obviously simultaneously.This will cause steel plate/mold interface lubricating oil to be easy to lose efficacy, and then cause surface of steel plate directly to contact with die surface, under high pressure, bring out the high strength steel plate surface damage, and surface quality worsens.The surface damage defective effect the stamping parts surface quality, can make mould that more serious wearing and tearing take place again, reduces die life, causes and improves manufacturing cost because of repairing a die; The piece surface damage defect also can reduce its performance, like crashworthiness, corrosion resistivity, fatigue resistence etc.; Margin of safety diminished when the surface damage defective also made shaping, had reduced the stability of Sheet Metal Forming Technology, caused rejection rate to rise.Through reducing this defective, can improve the quality of products and yield rate, prolong die life, reduce manufacturing cost.The test method commonly used of the surface damage of research sheet stamping at present is drawbead method or U-shaped spare bending method.For advanced high strength steel plate was shaped, there was not the drawbead structure in mould, and the drawbead method can't be simulated the true drawing situation of advanced high strength steel plate.U-shaped spare bending method can only be simulated the surface damage situation of drip molding straight portion under the part pure bending condition, can not simulate the surface damage situation under mould corner contractive condition.And advanced high strength steel plate not only is not with the drawbead structure, and is had various deformation states such as stretchings-bending and compression when being shaped.
Literature search through to prior art is found; China's number of applying for a patent 200610027090.9; Name is called vehicle plate surface galling defect inducing device, and this technology is mentioned: a kind of vehicle plate surface galling defect inducing device, the square work-piece of the band drawbead that this test method is used; One Chinese patent application numbers 200610023240.9; Name is called the method for simulated automotive panel surface galling defect; This technology is mentioned: a kind of method of simulated automotive plate surface galling defect of Vehicle Engineering technical field, employed test method are a kind of shallow base cone platform box spares with drawbead.Above-mentioned two technology exist deficiency to be: all use the square work-piece and the shallow base cone platform box spare of band drawbead, can not be used for not being with the advanced high-strength steel sheet stamping surface damage research of drawbead and bad plasticity.
Summary of the invention
In order to study and solve the surface damage defective of advanced high-strength steel thin plate in forming process, the invention provides a kind of sheet stamping surface damage test unit that can realize the various deformation state.This device can be simulated the surface damage under the multiple stretching-bending condition of advanced high-strength steel sheet stamping member straight portion, can simulate it again and occur in the surface damage situation under the multiple contractive condition in mould corner.
The present invention realizes through following technical scheme; The present invention includes: stretching chuck, upper bolster, patrix are inserted, patrix auxiliary block, die shoe, counterdie are inserted, the counterdie auxiliary block; Wherein: patrix is inserted and is connected through pin with the patrix auxiliary block, and the patrix auxiliary block is screwed in upper bolster, and counterdie is inserted and is connected through pin with the counterdie auxiliary block; The counterdie auxiliary block is screwed in die shoe, and upper and lower mould connects matched moulds through screw.The patrix surperficial fluted structure of inserting realizes the various deformation state through the groove structure form, promptly comprises multiple stretching-flexural deformation state and compression deformation state.
Said die holder up and down all adopts 45 steel, modifier treatment.Four tapped through holes are arranged on the upper bolster, and die shoe is used screw-driving to four screw thread closed pores should be arranged during matched moulds.Die shoe is fixed on the test bench through four bolts.
Said upper and lower mould is inserted and is all adopted mould steel DC53, handles through the TD coating, and hardness is 60-62HRC.Except that patrix insert go up fluted, the contour structure of inserting up and down is measure-alike, it is I-shaped that profile is.
Said upper and lower mould auxiliary block all adopts 45 steel, modifier treatment, and about the upper and lower mould auxiliary block is divided into two, be the T font, cooperate with I-shaped inserting, fix with die holder up and down respectively again, respectively to the located lateral effect of having inserted up and down.
Said pin is distributed in the I-shaped body section of inserting, about each two.
The said patrix surperficial fluted structure of inserting adopts the parallel groove structure, can realize the stamping surface damage test of thin plate stretching-flexural deformation state; Adopt the trapezoidal groove structure, can realize the stamping surface damage test of thin plate compression deformation state, and ratio of compression depends on and trapezoidal angle;
When the present invention worked, T shape left and right sides auxiliary block and I-shaped the inserting with upper and lower mould coupled together through four pins respectively, again they used screw; Be individually fixed in die holder up and down; After placing sheet material, with screw upper and lower mould is closed and to tighten, carry out the test of sheet stamping surface damage.
The present invention compares prior art and has the following advantages: the present invention is with the test unit of realizing multiple strain paths that comprises stretching-bending condition and contractive condition; Simulate the advanced high strength steel plate strain regime when being shaped; Study sheet stamping surface damage defective; Can study the surface damage situation that occurs in straight portion, can study the surface damage situation that occurs in the corner again, realize multiple strain paths lower thin sheet stamping surface damage research; The present invention adopts the combination formula of inserting, on the one hand can be according to the needs of strain regime research, and replacing is inserted; On function, can accomplish one module multiple usages; Ought insert on the other hand may wear to a certain degree, and the method that can insert through replacing makes that mould can continue to use; Life-span prolongs, and cost drops to minimum.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a partial enlarged drawing;
Fig. 3 is the patrix surface groove structure of inserting;
Fig. 4 is principle of simulation figure;
Fig. 5 implements synoptic diagram for one embodiment of the invention;
Fig. 6 is embodiment figure as a result.
Embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Present embodiment: adopt test unit like Fig. 1; Wherein patrix is inserted 3 surperficial die structures for like the run-in index structure among Fig. 3; Research stretching-flexural deformation state lower thin sheet DP780CR stamping surface degree of impairment; Advanced high strength steel plate 2 shape in test is as shown in Figure 2 in the present embodiment, advanced high strength steel plate stretching-flexural deformation state in the simulation forming process (like Fig. 4).
As shown in Figure 5; Among the figure: stretching chuck 1, advanced high strength steel plate 2, upper bolster 7, patrix insert 3, patrix auxiliary block 5, die shoe 8, counterdie are inserted 11, counterdie auxiliary block 9; Wherein: patrix is inserted and 3 10 is connected through pin with patrix left and right sides auxiliary block 5, and patrix auxiliary block 5 usefulness screws 4 are fixed in upper bolster 7, and counterdie is inserted and 11 4 is connected through pinning with counterdie left and right sides auxiliary block 9; Counterdie auxiliary block 9 usefulness screws 4 are fixed in die shoe 8, and upper and lower mould connects matched moulds through screw 6.
Said advanced high strength steel plate 2 adopts DP780CR, its thickness of slab 1.2mm, wide 52mm.
Said upper bolster 7 all adopts 45 steel, modifier treatment with die shoe 8.Four tapped through holes are arranged on the upper bolster 7, and 8 pairs of die shoes should have four screw thread closed pores, tighten with screw 6 during matched moulds.Die shoe 8 is fixed on the test bench through four bolts.
Said patrix is inserted and 3 is inserted with counterdie and 11 all to adopt mould steel DC53, and through TD thermal treatment, hardness is 60-62HRC.Remove patrix and insert flutedly on 3, counterdie is inserted not to be had outside the groove on 11, and it is 3 identical with insert 11 physical dimension of counterdie that patrix is inserted, and is I-shaped.
Said patrix 3 thickness of slab and the width according to advanced high strength steel plate 2 of inserting are selected corresponding size, and the groove structure form on it is the run-in index structure, its dark 1.10mm, wide 52mm.
Said patrix auxiliary block 5 all adopts 45 steel with counterdie auxiliary block 9, modifier treatment, and about patrix auxiliary block 5 is divided into counterdie auxiliary block 9 two, be the T font, insert with I-shaped patrix respectively and 5 insert with counterdie and 9 to cooperate, play the located lateral effect.
Said pin 10 is distributed in I-shaped 3 (or 11) body section of inserting, about each two, diameter phi 8mm.
During present embodiment work; I-shaped four pins 10 of 3 usefulness of inserting of patrix T shape left and right sides auxiliary block 5 and patrix are connected; The T shape left and right sides auxiliary block 9 of counterdie is connected with I-shaped four pins of 11 usefulness of inserting of counterdie, they is fixed on upper bolster 7 and the die shoe 8 with screw 4 respectively again; After earlier placing sheet material DP780CR, with screw 6 up and down die holder close and tighten, stretching chuck 1 steps up to open the merit testing machine on the sheet material, carries out DP590 steel plate stamping surface damage test with draw speed 10mm/s.Repeat DP590 steel plate stamping surface damage test 10 times.After the off-test, with roughness tester surface measurements damage depth capacity, measured result is shown in curve among Fig. 6.
Present embodiment: operating means adopts the test unit like Fig. 1; Wherein patrix is inserted 3 surperficial die structures for like the trapezoidal formula structure among Fig. 3; Research compression deformation state lower thin sheet DP780CR stamping surface degree of impairment; Advanced high strength steel plate 2 shape in test is as shown in Figure 2 in the present embodiment, advanced high strength steel plate compression deformation state in the simulation forming process (like Fig. 4).
As shown in Figure 5; Among the figure: stretching chuck 1, advanced high strength steel plate 2, upper bolster 7, patrix insert 3, patrix auxiliary block 5, die shoe 8, counterdie are inserted 11, counterdie auxiliary block 9; Wherein: patrix is inserted and 3 10 is connected through pin with patrix left and right sides auxiliary block 5, and patrix auxiliary block 5 usefulness screws 4 are fixed in upper bolster 7, and counterdie is inserted and 11 4 is connected through pinning with counterdie left and right sides auxiliary block 9; Counterdie auxiliary block 9 usefulness screws 4 are fixed in die shoe 8, and upper and lower mould connects matched moulds through screw 6.
Said advanced high strength steel plate adopts DP780CR, its thickness of slab 1.2mm, wide 52mm.
Said upper bolster 7 all adopts 45 steel, modifier treatment with die shoe 8.Four tapped through holes are arranged on the upper bolster 7, and 8 pairs of die shoes should have four screw thread closed pores, tighten with screw 6 during matched moulds.Die shoe 8 is fixed on the test bench through four bolts.
Said patrix is inserted and 3 is inserted with counterdie and 11 all to adopt mould steel DC53, and through TD thermal treatment, hardness is 60-62HRC.Remove patrix and insert flutedly on 3, counterdie is inserted not to be had outside the groove on 11, and it is 3 identical with insert 11 physical dimension of counterdie that patrix is inserted, and is I-shaped.
Said patrix 3 thickness of slab and the width according to advanced high strength steel plate 2 of inserting are selected corresponding size, and the groove structure form on it is trapezoidal formula structure, and its monolateral gradient is 5 °, groove depth 1.10mm, breadth extreme 52mm.
Said patrix auxiliary block 5 all adopts 45 steel with counterdie auxiliary block 9, modifier treatment, and about patrix auxiliary block 5 is divided into counterdie auxiliary block 9 two, be the T font, insert with I-shaped patrix respectively and 5 insert with counterdie and 9 to cooperate, play the located lateral effect.
Said pin 10 is distributed in I-shaped 3 (or 11) body section of inserting, about each two, diameter phi 8mm.
During present embodiment work; I-shaped four pins 10 of 3 usefulness of inserting of patrix T shape left and right sides auxiliary block 5 and patrix are connected; The T shape left and right sides auxiliary block 9 of counterdie is connected with I-shaped four pins of 11 usefulness of inserting of counterdie, they is fixed on upper bolster 7 and the die shoe 8 with screw 4 respectively again; After earlier placing sheet material DP780CR, with screw 6 up and down die holder close and tighten, stretching chuck 1 steps up to open the merit testing machine on the sheet material, carries out DP590 steel plate stamping surface damage test with draw speed 10mm/s.Repeat DP590 steel plate stamping surface damage test 10 times.After the off-test, with roughness tester surface measurements damage depth capacity, measured result is shown in curve among Fig. 6.
Claims (10)
1. sheet stamping surface damage test unit of realizing the various deformation state; It is characterized in that comprising: stretching chuck, upper bolster, patrix are inserted, patrix auxiliary block, die shoe, counterdie are inserted, the counterdie auxiliary block; Wherein: patrix is inserted and is connected through pin with the patrix auxiliary block, and the patrix auxiliary block is screwed in upper bolster, and counterdie is inserted and is connected through pin with the counterdie auxiliary block; The counterdie auxiliary block is screwed in die shoe, and upper and lower mould connects matched moulds through screw; The patrix surperficial fluted structure of inserting realizes the various deformation state through the groove structure form, promptly comprises stretching-flexural deformation state and compression deformation state.
2. the sheet stamping surface damage test unit of realization various deformation state according to claim 1; It is characterized in that: four tapped through holes are arranged on the said upper bolster; Die shoe is to there being four screw thread closed pores; Use screw-driving during matched moulds, die shoe passes through four bolt on test bench.
3. the sheet stamping surface damage test unit of realization various deformation state according to claim 1 and 2, it is characterized in that: said upper bolster, die shoe all adopt 45 steel, modifier treatment.
4. the sheet stamping surface damage test unit of realization various deformation state according to claim 1; It is characterized in that: said patrix is inserted and counterdie is inserted; Except that patrix insert go up fluted, patrix is inserted measure-alike with the counterdie contour structure of inserting, it is I-shaped that profile is.
5. according to the sheet stamping surface damage test unit of claim 1 or 4 described realization various deformation states; It is characterized in that: the said patrix surperficial fluted structure of inserting; Adopt the parallel groove structure, realize the stamping surface damage test of thin plate stretching-flexural deformation state.
6. according to the sheet stamping surface damage test unit of claim 1 or 4 described realization various deformation states; It is characterized in that: the said patrix surperficial fluted structure of inserting; Adopt the trapezoidal groove structure; Realize the stamping surface damage test of thin plate compression deformation state, and ratio of compression depends on and trapezoidal angle.
7. according to the sheet stamping surface damage test unit of claim 1 or 4 described realization various deformation states, it is characterized in that: said patrix is inserted and counterdie is inserted all adopts mould steel DC53, handles through the TD coating, and hardness is 60-62HRC.
8. the sheet stamping surface damage test unit of realization various deformation state according to claim 1; It is characterized in that: about said patrix auxiliary block, counterdie auxiliary block are divided into two; Be the T font; Insert with I-shaped patrix and counterdie is inserted and cooperated, fix with upper bolster, die shoe respectively again, respectively patrix is inserted and the counterdie located lateral effect of having inserted.
9. according to the sheet stamping surface damage test unit of claim 1 or 8 described realization various deformation states, it is characterized in that: said upper and lower mould auxiliary block all adopts 45 steel, modifier treatment.
10. the sheet stamping surface damage test unit of realization various deformation state according to claim 1 is characterized in that: said pin is distributed in I-shaped patrix and inserts and the counterdie body section of inserting, about each two.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110234426 CN102323167B (en) | 2011-08-16 | 2011-08-16 | Sheet stamping surface damage test apparatus for realizing a plurality of deformation states |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110234426 CN102323167B (en) | 2011-08-16 | 2011-08-16 | Sheet stamping surface damage test apparatus for realizing a plurality of deformation states |
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| CN102323167A true CN102323167A (en) | 2012-01-18 |
| CN102323167B CN102323167B (en) | 2013-03-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105092377A (en) * | 2015-08-11 | 2015-11-25 | 北方工业大学 | Testing device for realizing plane strain state in large deformation range and data processing method |
| CN107084879A (en) * | 2017-05-25 | 2017-08-22 | 钢铁研究总院华东分院 | One kind customization warm forming experimental rig |
| CN107255582A (en) * | 2016-10-08 | 2017-10-17 | 浙江农林大学 | A kind of sheet-metal press working surface damage Fast simulation experimental provision |
| CN114705559A (en) * | 2022-06-07 | 2022-07-05 | 合肥鼎原科技有限公司 | Automatic monitoring system for microwave radio frequency switch production |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092377A (en) * | 2015-08-11 | 2015-11-25 | 北方工业大学 | Testing device for realizing plane strain state in large deformation range and data processing method |
| CN105092377B (en) * | 2015-08-11 | 2017-07-11 | 北方工业大学 | Testing device for realizing plane strain state in large deformation range and data processing method |
| CN107255582A (en) * | 2016-10-08 | 2017-10-17 | 浙江农林大学 | A kind of sheet-metal press working surface damage Fast simulation experimental provision |
| CN107255582B (en) * | 2016-10-08 | 2020-05-12 | 浙江农林大学 | Rapid simulation experiment device for sheet stamping surface damage |
| CN107084879A (en) * | 2017-05-25 | 2017-08-22 | 钢铁研究总院华东分院 | One kind customization warm forming experimental rig |
| CN114705559A (en) * | 2022-06-07 | 2022-07-05 | 合肥鼎原科技有限公司 | Automatic monitoring system for microwave radio frequency switch production |
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| CN102323167B (en) | 2013-03-27 |
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