CN102323167B - 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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- CN102323167B CN102323167B CN 201110234426 CN201110234426A CN102323167B CN 102323167 B CN102323167 B CN 102323167B CN 201110234426 CN201110234426 CN 201110234426 CN 201110234426 A CN201110234426 A CN 201110234426A CN 102323167 B CN102323167 B CN 102323167B
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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 a kind of device of parallel computing technical 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 large themes of current development of automobile, so that the light weight of automobile has changed into inevitable choice.And advanced high strength steel plate is with its good comprehensive mechanical property, integrates lightweight, good crashworthiness and economy, becomes the preferred material of automotive light weight technology, also is a study hotspot 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, need larger pressure-pad-force in forming process, so steel plate/mold interface bears high contact 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, bring out the high strength steel plate surface damage under high pressure, and surface quality worsens.The surface damage defective effect the stamping parts surface quality, can make again mould that more serious wearing and tearing occur, and reduces die life, causes and improves manufacturing cost because repairing a die; The piece surface damage defect also can reduce its performance, such as 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.By reducing this defective, can improve the quality of products and yield rate, prolong die life, reduce manufacturing cost.The common test method of at present research thin plate stamping surface damage 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 when being shaped, and exists and stretch-the various deformation states such as crooked and compression.
Find through the literature search to prior art, 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 with drawbead that this test method is used; 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 Shortcomings are: all use square work-piece and shallow base cone platform box spare with drawbead, can not be used for not with drawbead and the poor advanced high-strength steel sheet stamping surface damage research of 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 again it and occur in surface damage situation under the multiple contractive condition in mould corner.
The present invention is achieved through the following technical solutions, the present invention includes: tensioning 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 by pin with the patrix auxiliary block, the patrix auxiliary block is screwed in upper bolster, counterdie is inserted and is connected by pin with the counterdie auxiliary block, the counterdie auxiliary block is screwed in die shoe, and upper and lower mould is connected by screw matched moulds.The patrix surperficial fluted structure of inserting realizes the various deformation state by the groove structure form, namely comprises multiple stretching-flexural deformation state and compression deformation state.
Described up and down die holder 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 by four bolts.
Described upper and lower mould is inserted and is all adopted mould steel DC53, and through the TD coating, hardness is 60-62HRC.Except patrix insert upper fluted, the contour structure of inserting up and down is measure-alike, it is I-shaped that profile is.
Described 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, in T shape, 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.
Described pin is distributed in the I-shaped main body section of inserting, about each two.
The described 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 by four pins respectively, again they used screw, be individually fixed in up and down die holder, 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 has the following advantages compared to existing technology: the present invention's test unit of realizing multiple strain paths that comprises stretching-bending condition and contractive condition, strain regime when simulating advanced high strength steel plate shaping, study thin plate stamping surface damage defect, can study the surface damage situation that occurs in straight portion, can study again the surface damage situation that occurs in the corner, realize multiple strain paths lower thin sheet stamping surface damage research; The present invention adopts the assembled inlay blocks formula, on the one hand can be according to the needs of strain regime research, 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 by replacing is so that mould can continue to use, life, cost drops to minimum.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is partial enlarged drawing;
Fig. 3 is the patrix surface groove structure of inserting;
Fig. 4 is principle of simulation figure;
Fig. 5 is that one embodiment of the invention is implemented synoptic diagram;
Fig. 6 is as a result figure of embodiment.
Embodiment
The below elaborates to embodiments of the invention, and present embodiment is implemented under take technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Present embodiment: adopt the test unit such as Fig. 1, wherein patrix is inserted 3 surperficial cavity die structures for such as the run-in index structure among Fig. 3, research stretching-flexural deformation state lower thin sheet DP780CR stamping surface degree of impairment, in the present embodiment advanced high strength steel plate 2 shape in test as shown in Figure 2, advanced high strength steel plate stretching-flexural deformation state in the simulation forming process (such as Fig. 4).
As shown in Figure 5, among the figure: tensioning 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 is connected by pin 10 with patrix left and right sides auxiliary block 5, patrix auxiliary block 5 usefulness screws 4 are fixed in upper bolster 7, counterdie is inserted and 11 is connected by pin 4 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 by screw 6.
Described advanced high strength steel plate 2 adopts DP780CR, its thickness of slab 1.2mm, wide 52mm.
Described upper bolster 7 and die shoe 8 all adopt 45 steel, modifier treatment.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 by four bolts.
Described patrix insert 3 and counterdie insert and 11 all adopt mould steel DC53, through TD thermal treatment, hardness is 60-62HRC.Insert flutedly on 3 except patrix, 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.
Described 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.
Described patrix auxiliary block 5 and counterdie auxiliary block 9 all adopt 45 steel, modifier treatment, about patrix auxiliary block 5 and counterdie auxiliary block 9 are divided into two, in T shape, respectively with I-shaped patrix insert 5 and counterdie insert and 9 cooperate, play the located lateral effect.
Described pin 10 is distributed in the I-shaped 3(of inserting or 11) main body section, 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 placing first sheet material DP780CR, with screw 6 up and down die holder close and tighten, tensioning chuck 1 steps up the sheet material upper end, opens the merit testing machine, carries out the test of DP590 steel plate punched surface damage with draw speed 10mm/s.Repeat 10 DP590 steel plate punched surface damage tests.After the off-test, with roughness tester meter surface damage depth capacity, measured result is shown in curve among Fig. 6.
Present embodiment: operating means adopts the test unit such as Fig. 1, wherein patrix is inserted 3 surperficial cavity die structures for such as the trapezoidal structure among Fig. 3, research compression deformation state lower thin sheet DP780CR stamping surface degree of impairment, in the present embodiment advanced high strength steel plate 2 shape in test as shown in Figure 2, advanced high strength steel plate compression deformation state in the simulation forming process (such as Fig. 4).
As shown in Figure 5, among the figure: tensioning 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 is connected by pin 10 with patrix left and right sides auxiliary block 5, patrix auxiliary block 5 usefulness screws 4 are fixed in upper bolster 7, counterdie is inserted and 11 is connected by pin 4 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 by screw 6.
Described advanced high strength steel plate adopts DP780CR, its thickness of slab 1.2mm, wide 52mm.
Described upper bolster 7 and die shoe 8 all adopt 45 steel, modifier treatment.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 by four bolts.
Described patrix insert 3 and counterdie insert and 11 all adopt mould steel DC53, through TD thermal treatment, hardness is 60-62HRC.Insert flutedly on 3 except patrix, 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.
Described 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 trapezoidal structure, and its monolateral gradient is 5 °, groove depth 1.10mm, breadth extreme 52mm.
Described patrix auxiliary block 5 and counterdie auxiliary block 9 all adopt 45 steel, modifier treatment, about patrix auxiliary block 5 and counterdie auxiliary block 9 are divided into two, in T shape, respectively with I-shaped patrix insert 5 and counterdie insert and 9 cooperate, play the located lateral effect.
Described pin 10 is distributed in the I-shaped 3(of inserting or 11) main body section, 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 placing first sheet material DP780CR, with screw 6 up and down die holder close and tighten, tensioning chuck 1 steps up the sheet material upper end, opens the merit testing machine, carries out the test of DP590 steel plate punched surface damage with draw speed 10mm/s.Repeat 10 DP590 steel plate punched surface damage tests.After the off-test, with roughness tester meter surface damage depth capacity, measured result is shown in curve among Fig. 6.
Claims (8)
1. sheet stamping surface damage test unit of realizing the various deformation state, it is characterized in that comprising: tensioning 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 by pin with the patrix auxiliary block, the patrix auxiliary block is screwed in upper bolster, counterdie is inserted and is connected by pin with the counterdie auxiliary block, the counterdie auxiliary block is screwed in die shoe, and die holder is connected by screw matched moulds up and down; The patrix surperficial fluted structure of inserting realizes the various deformation state by the groove structure form, namely comprises stretching-flexural deformation state and compression deformation state;
Described patrix is inserted and counterdie is inserted, except patrix insert upper fluted, patrix insert and the counterdie contour structure of inserting measure-alike, it is I-shaped that profile is;
About described patrix auxiliary block, counterdie auxiliary block are divided into two, in T shape, 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.
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 described upper bolster, die shoe is to there being four screw thread closed pores, use screw-driving during matched moulds, die shoe is fixed on the test bench by four bolts.
3. the sheet stamping surface damage test unit of realization various deformation state according to claim 1, it is characterized in that: described 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: the described patrix surperficial fluted structure of inserting, adopt the parallel groove structure, realize the stamping surface damage test of thin plate stretching-flexural deformation state.
5. the sheet stamping surface damage test unit of realization various deformation state according to claim 1, it is characterized in that: the described 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 trapezoidal angle.
6. the sheet stamping surface damage test unit of realization various deformation state according to claim 1 is characterized in that: described patrix is inserted and counterdie is inserted all adopts mould steel DC53, and through the TD coating, hardness is 60-62HRC.
7. the sheet stamping surface damage test unit of realization various deformation state according to claim 1, it is characterized in that: described upper and lower mould auxiliary block all adopts 45 steel, modifier treatment.
8. the sheet stamping surface damage test unit of realization various deformation state according to claim 1 is characterized in that: main body section that described pin is distributed in that I-shaped patrix is inserted and counterdie is inserted, 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 |
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| 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 CN102323167A (en) | 2012-01-18 |
| CN102323167B true CN102323167B (en) | 2013-03-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN114705559B (en) * | 2022-06-07 | 2022-08-26 | 合肥鼎原科技有限公司 | Automatic monitoring system for microwave radio frequency switch production |
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| CN200962083Y (en) * | 2006-10-18 | 2007-10-17 | 宝山钢铁股份有限公司 | Cutting stress crumpling test mould |
| CN201034870Y (en) * | 2007-04-25 | 2008-03-12 | 宝山钢铁股份有限公司 | terrace die for inducing vehicle plate surface galling defect experiment and tester |
| CN201897552U (en) * | 2010-11-24 | 2011-07-13 | 浙江吉利汽车研究院有限公司 | Novel torsion rebound property experimental die for high-strength steel plate after punching and forming |
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