CN104550454A - Die structure - Google Patents
Die structure Download PDFInfo
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- CN104550454A CN104550454A CN201310487749.9A CN201310487749A CN104550454A CN 104550454 A CN104550454 A CN 104550454A CN 201310487749 A CN201310487749 A CN 201310487749A CN 104550454 A CN104550454 A CN 104550454A
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- Prior art keywords
- holding pad
- die
- workpiece
- lower holding
- punch
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Classifications
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- 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
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a die structure comprising a female die component and a male die component. The male die component is arranged under the female die component and comprises a die holder, a male die arranged on the die holder and a pressing plate. The pressing plate penetrates the male die to be vertically movably arranged on the die holder. The distance of the vertical movement of the pressing plate is less than stretching depth of a workpiece. As the female component moves downwards to be matched with the pressing plate, the pressing plate and the female component synchronously move downwards, and preset deformation occurs to the edge of the workpiece. According to the arrangement, as the distance of the vertical movement of the pressing plate is less that vertical height of the sidewall of the workpiece stamped, the workpiece is applied with low acting force by a fillet of the female die component, the enough deformation occurs to the sidewall of the workpiece, and accordingly stress is uniformly distributed on the inner and the outer surfaces of the workpiece without curling and springs back.
Description
Technical field
The present invention relates to pressing equipment field, especially relate to a kind of mould structure.
Background technology
When adopting traditional mould structure to carry out punching press to high-strength steel plate, due to the fillet effect of punch and die, make the stress distribution of workpiece surfaces externally and internally uneven, be out of shape inconsistent, when punching press terminates after workpiece leaves die cavity, due to the recovery of elastic force, the stress of workpiece surfaces externally and internally can change, thus the sidewall of workpiece easily produces the situations such as curling resilience.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, one object of the present invention is to propose a kind of mould structure, and described mould structure effectively can control the situation of the curling resilience of the sidewall of high strength steel plate in stamping process, improves forming accuracy and the quality of high strength steel plate stamping parts.
According to mould structure of the present invention, comprising: die assembly; And punch assemblies, described punch assemblies is located at the below of described die assembly, and described punch assemblies comprises: die shoe; Punch, described punch is located on described die shoe; And lower holding pad, described lower holding pad passes described punch and can be located at up or down on described die shoe, the distance of wherein said lower holding pad movement is in the vertical direction less than the stretching depth of workpiece, and described lower holding pad be configured to when described die assembly move downwardly to coordinate with described lower holding pad after, described lower holding pad and described die component synchronization moves downward and the edge of described workpiece produces predetermined deformation amount.
According to mould structure of the present invention, by the upper surface of lower holding pad being arranged to the upper surface lower than punch, distance due to the movement in the vertical direction of lower holding pad is less than the sidewall height in the vertical direction of the stamping rear workpiece of workpiece, such workpiece is in stamping process, the active force being subject to the fillet of die assembly is less, the sidewall of workpiece has enough deflections, thus workpiece with the surface of die component touch and the stress distribution on surface that contacts with punch assemblies even, there will not be the phenomenon of curling resilience.
Particularly, described die assembly comprises: upper bolster; Die, described die is located on the lower surface of described upper bolster; And upper holding pad, described upper holding pad passes described die and can be located at up or down on described upper bolster.Thus, die can move in the vertical direction with upper bolster and prevent workpiece in stamping process, occur the phenomenon of torsional deformation.
Particularly, the lower surface of described die is provided with boss, and on described lower holding pad, the position of corresponding described boss is formed with groove.Thus, by coordinating of boss and groove, the flange of whole workpiece is fully stretched, thus strengthens the stability of component shaping.
Further, the upper surface of described lower holding pad is lower than the upper surface of described punch.
Alternatively, described upper holding pad can be located on described upper bolster up or down by the first flexible member.
Alternatively, described first flexible member is spring.
Further, mould structure comprises further: backing plate, and described backing plate is located between described upper bolster and described die.Thus, cost is reduced.
Alternatively, described lower holding pad can be located on described die shoe up or down by the second flexible member, and described second flexible member has time delay.
Alternatively, described second flexible member is the nitrogen cylinder with time delay.Thus, by adopting the nitrogen cylinder with time delay, thus workpiece is prevented to occur the situation of curling resilience further.
Alternatively, the distance of described lower holding pad movement is in the vertical direction 6mm.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the profile of mould structure according to the embodiment of the present invention and workpiece.
Reference numeral:
100: mould structure;
11: upper bolster; 12: die; 121: boss;
13: upper holding pad; 14: the first flexible members; 15: backing plate;
21: die shoe; 22: punch;
23: lower holding pad; 231: groove; 24: the second flexible members;
200: workpiece.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " on ", D score, " vertically ", " interior ", " outward ", the orientation of the instruction such as " highly " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
Below with reference to Fig. 1, the mould structure 100 according to the embodiment of the present invention is described.
As shown in Figure 1, according to the mould structure 100 of the embodiment of the present invention, comprising: die assembly and punch assemblies, punch assemblies is located at the below of die assembly.
Wherein, punch assemblies comprises: die shoe 21, punch 22 and lower holding pad 23, punch 22 is located on die shoe 21, lower holding pad 23 is through punch 22, and lower holding pad 23 can be located on die shoe 21 up or down, wherein descend the distance of holding pad 23 movement to be in the vertical direction less than the stretching depth of workpiece 200, and lower holding pad 23 be configured to when die assembly move downwardly to coordinate with lower holding pad 23 after, lower holding pad 23 and die component synchronization moves downward and the edge of workpiece 200 produces predetermined deformation amount.Particularly, the upper surface of lower holding pad 23 is lower than the upper surface of punch 22.
In one of them example of the present invention, die assembly is located on added (the scheming not shown) of press (scheming not shown), thus die assembly can along with added the moving up and down and move up and down of press, punch assemblies is located on the undercarriage (scheming not shown) of press, and wherein die shoe 21 can link together with the undercarriage of press.Particularly, with reference to Fig. 1, die shoe 21 can be fixedly connected with the undercarriage of press, lower holding pad 23 is positioned at the top of die shoe 21, punch 22 is located at the top of die shoe 21, and punch 22 extends straight up from the upper surface of die shoe 21 and passes lower holding pad 23, now the upper surface of punch 22 is higher than the upper surface of lower holding pad 23, particularly, lower holding pad 23 can be formed with the first through hole run through along the vertical direction, punch 22 can pass this first through hole, alternatively, the outer peripheral face of punch 22 is formed as the shape suitable with the shape of the internal face of the first through hole, descend holding pad 23 just can move in the vertical direction along the sidewall of punch 22 like this.
When the top shoe (scheming not shown) of press is in top dead-centre, die assembly is positioned at the top of punch assemblies, and die assembly and punch assemblies are spaced apart from each other in the vertical direction, now steel plate can be placed in punch assemblies by operator, when the top shoe of press moves down, the added die assembly that can drive moves down, first die assembly coordinates with punch, along with moving down of die assembly, the sidewall of workpiece 200 is in free state, and the sidewall of workpiece 200 bends downwards under the impetus of die assembly, the sidewall of such workpiece 200 can have enough deflections, then, when die assembly continue to move downwardly to coordinate with lower holding pad 23 time, die assembly and lower holding pad 23 move downward jointly, the edge of workpiece 200 is made to produce predetermined deflection, to ensure the shape stability of workpiece 200, preferably, the distance (L1 such as shown in Fig. 1) of lower holding pad 23 movement is in the vertical direction 6mm, when after die component movement to the lower dead point position of press, workpiece 200 is stamping.Thus, tensile elongation (L2 shown in illustration 1) due to workpiece 200 is greater than the distance L1 of lower holding pad 23 movement in the vertical direction, thus the sidewall of workpiece 200 has enough deflections, and the fillet active force that workpiece 200 is subject to is less, the inside and outside stress distribution of workpiece 200 is even, thus curling resilience can not occur the sidewall of workpiece 200 after being shaped.Here, it should be noted that, structure and top dead-centre, the bottom dead centre etc. of added, undercarriage, the top shoe of press are known for a person skilled in the art, no longer describe in detail here.
Certainly, the present invention is not limited thereto, lower holding pad 23 can also be two, and two lower holding pads 23 are spaced apart from each other in the lateral direction, and punch 22 is located between two lower holding pads 23.Further, link (scheming not shown) can also be provided with between lower holding pad 23 and die shoe 21, thus lower holding pad 23 firmly can be located at the top of die shoe 21, and not easily rock.
According to the mould structure 100 of the embodiment of the present invention, by the upper surface of lower holding pad 23 being arranged to the upper surface lower than punch 22, distance L1 due to the movement in the vertical direction of lower holding pad 23 is less than the sidewall height L2 in the vertical direction of the stamping rear workpiece 200 of workpiece 200, such workpiece 200 is in stamping process, the active force being subject to the fillet of die assembly is less, the sidewall of workpiece 200 has enough deflections, thus workpiece 200 with the surface of die component touch and the stress distribution on surface that contacts with punch assemblies even, there will not be the phenomenon of curling resilience.
In one embodiment of the invention, die assembly comprises: upper bolster 11 and die 12, die 12 is located on the lower surface of upper bolster 11.Such as in the example of fig. 1, die 12 is located at the bottom of upper bolster 11, and die 12 extends straight down from the lower surface of upper bolster 11, the mode that die 12 can be threaded connection and upper bolster 11 link into an integrated entity, thus die 12 can move together in the vertical direction along with upper bolster 11.Certainly, the present invention is not limited thereto, die 12 can also link into an integrated entity with upper bolster 11.
Further, with reference to Fig. 1, die assembly comprises further: upper holding pad 13, and upper holding pad 13 passes die 12 and can be located at up or down on upper bolster 11.
As shown in Figure 1, die 12 is formed with the second through hole run through, upper holding pad 13 is positioned at the second through hole and is connected with the bottom of upper bolster 11, and upper holding pad 13 can move in the vertical direction relative to upper bolster 11, when in the process that press drives die assembly to move downward, upper holding pad 13 can first with the workpiece 200(such as steel plate treating swaging) upper surface contact, namely the lower surface going up holding pad 13 only supports mutually with the upper surface of workpiece 200, thus the stop motion of upper holding pad 13 is with fixation workpiece 200 common with punch 22, then press drives die assembly to continue to move downward, die 12 starts to contact the workpiece 200 treating swaging.Thus, upper holding pad 13 can prevent workpiece 200 from stamping process, occurring the phenomenon of torsional deformation.Alternatively, the lower surface of upper holding pad 13 is formed as the shape suitable with workpiece 200 upper surface.
Certainly, the present invention is not limited thereto, die 12 can also be two, and two dies 12 are spaced apart from each other in the lateral direction, and upper holding pad 13 is located between two dies 12.
In one embodiment of the invention, the lower surface of die 12 is provided with boss 121, and on lower holding pad 23, the position of corresponding boss 121 is formed with groove 231.With reference to Fig. 1, boss 121 is located on the lower surface of die 12, and boss 121 extends straight down from the lower surface of die 12, lower holding pad 23 is formed with the groove 231 suitable with boss 121, and groove 231 is recessed into downwards from the upper surface of lower holding pad 23, the side wall surface of the contiguous punch 22 of boss 121 and the outside wall surface of punch 22 are spaced apart from each other, and the side wall surface of the contiguous punch 22 of boss 121 is arranged on the outside (outside of the A-A line such as shown in Fig. 1 and the outside of B-B line) of effective flange that workpiece 200 finally retains, here it should be noted that, " outward " can be understood as the direction at the center away from punch 22, in the process that workpiece 200 is stamping, along with die assembly moves down gradually, first the sidewall of boss 121 coordinates the exterior rim wall with pressing component 200 with the corresponding sidewall of groove 231, thus the flange of workpiece 200 entirety is fully stretched.
Further, upper holding pad 13 can be located on upper bolster 11 up or down by the first flexible member 14.Such as in the example of fig. 1, upper holding pad 13 is connected with upper bolster 11 by the first flexible member 14, particularly, the upper end of the first flexible member 14 is connected with the lower end of upper bolster 11, the lower end of the first flexible member 14 is connected with the upper end of upper holding pad 13, because the first flexible member 14 can free-extension in the vertical direction, like this, upper holding pad 13 just can move in the vertical direction, when the top shoe (scheming not shown) of press is in top dead-centre, first flexible member 14 is in free state, when press starts to drive die assembly to move downward, first flexible member 14 is in free state always, upper holding pad 13 and workpiece 200 phase only support and static after, upper bolster 11 etc. in die assembly continues to move downward, upper bolster 11 starts to compress the first flexible member 14, now die 12 also correspondingly continues to move down, when the lower surface of die 12 is mutually concordant with the lower surface of upper holding pad 13, die 12 starts to contact workpiece 200, then upper bolster 11 continues to move down and compresses the first flexible member 14, the lower surface of die 12 is lower than the lower surface of upper holding pad 13, workpiece 200 starts the distortion of early period of origination.Thus, can ensure the initial stage of the swaging process at workpiece 200 by arranging the first flexible member 14, first upper holding pad 13 can contact workpiece 200, thus prevents workpiece 200 in swaging, occur the situation of torsional deformation further.
Alternatively, multiple first flexible member 14 between upper holding pad 13 and upper bolster 11, can be provided with, and multiple first flexible member 14 is spaced from each other, thus makes the process that moves up and down of holding pad 13 can be more stable.Further, multiple first flexible member 14 is evenly distributed between holding pad 13 and upper bolster 11.
Alternatively, the first flexible member 14 is spring, and such as the first flexible member 14 can be disk spring, cylindrical shape Compress Spring and ring spring etc.Certainly, the present invention is not limited thereto, the first flexible member 14 can also adopt the flexible member of other types.
Further, mould structure 100 comprises further: backing plate 15, and backing plate 15 is located between upper bolster 11 and die 12.As shown in Figure 1, backing plate 15 is provided with between upper bolster 11 and die 12, particularly, the upper surface of backing plate 15 contacts with the lower surface of upper bolster 11, the lower surface of backing plate 15 contacts with the upper surface of die 12, further, upper bolster 11, backing plate 15 and die 12 can be threaded connection, the mode such as bonding forms as one structure.Thus, cost is reduced.
Further, lower holding pad 23 can be located on die shoe 21 up or down by the second flexible member 24, and the second flexible member 24 has time delay.Alternatively, the second flexible member 24 is for having the nitrogen cylinder of time delay.Such as in the example of fig. 1, lower holding pad 23 is connected with die shoe 21 by the second flexible member 24, particularly, the lower end of lower holding pad 23 is connected with the upper end of the second flexible member 24, the upper end of die shoe 21 is connected with the lower end of the second flexible member 24, because the second flexible member 24 can free-extension in the vertical direction, like this, lower holding pad 23 just can move in the vertical direction.
Particularly, when in the process of die 12 in backhaul, first flexible member 14 starts little by little to resile, now go up holding pad 13 and be still in the state pressing solidly workpiece 200, because the second flexible member 24 has time delay, so the second flexible member 24 is still in compressive state, lower holding pad 23 is in lower dead point position transfixion, thus the distortion that can prevent workpiece 200 from occurring upwards, prevent workpiece 200 to occur the situation of curling resilience further.Certainly, the present invention is not limited thereto, the second flexible member 24 can also adopt other to have the flexible member of time delay.Here, it should be noted that, bottom dead centre is known for a person skilled in the art, no longer describes in detail here.
Here, be understandable that, because the distance of lower holding pad 23 preferred movement is in the vertical direction 6mm, so the second flexible member 24 collapsing length is in the vertical direction 6mm.
Alternatively, multiple second flexible member 24 between lower holding pad 23 and die shoe 21, can be provided with, and multiple second flexible member 24 is spaced from each other, thus makes the process that moves up and down of lower holding pad 23 can be more stable.Further, multiple second flexible member 24 is evenly distributed between lower holding pad 23 and die shoe 21.
According to the mould structure 100 of the embodiment of the present invention, the height ejected by the second flexible member 24 when mold open state due to lower holding pad 23 is less, that is, the fore-and-aft distance (L1 such as shown in Fig. 1) of lower holding pad 23 movement between top dead-centre and bottom dead centre is less, such workpiece 200 is in stamping process, the active force being subject to the fillet of die assembly is less, thus workpiece 200 with the surface of die component touch and the stress distribution on surface that contacts with punch assemblies even, there will not be the phenomenon of curling resilience.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.In addition, the different embodiment described in this description or example can carry out engaging and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change, revise, replace and be out of shape above-described embodiment within the scope of the invention.
Claims (10)
1. a mould structure, is characterized in that, comprising:
Die assembly; With
Punch assemblies, described punch assemblies is located at the below of described die assembly, and described punch assemblies comprises:
Die shoe;
Punch, described punch is located on described die shoe; And
Lower holding pad, described lower holding pad passes described punch and can be located at up or down on described die shoe, the distance of wherein said lower holding pad movement is in the vertical direction less than the stretching depth of workpiece, and described lower holding pad be configured to when described die assembly move downwardly to coordinate with described lower holding pad after, described lower holding pad and described die component synchronization moves downward and the edge of described workpiece produces predetermined deformation amount.
2. mould structure according to claim 1, is characterized in that, described die assembly comprises:
Upper bolster;
Die, described die is located on the lower surface of described upper bolster; And
Upper holding pad, described upper holding pad passes described die and can be located at up or down on described upper bolster.
3. mould structure according to claim 2, is characterized in that, the lower surface of described die is provided with boss, and on described lower holding pad, the position of corresponding described boss is formed with groove.
4. mould structure according to claim 1, is characterized in that, the upper surface of described lower holding pad is lower than the upper surface of described punch.
5. mould structure according to claim 2, is characterized in that, described upper holding pad can be located on described upper bolster up or down by the first flexible member.
6. mould structure according to claim 5, is characterized in that, described first flexible member is spring.
7. mould structure according to claim 2, is characterized in that, comprises further:
Backing plate, described backing plate is located between described upper bolster and described die.
8. mould structure according to claim 1, is characterized in that, described lower holding pad can be located on described die shoe up or down by the second flexible member, and described second flexible member has time delay.
9. mould structure according to claim 8, is characterized in that, described second flexible member is the nitrogen cylinder with time delay.
10. the mould structure according to any one of claim 1-9, is characterized in that, the distance of described lower holding pad movement is in the vertical direction 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310487749.9A CN104550454A (en) | 2013-10-17 | 2013-10-17 | Die structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310487749.9A CN104550454A (en) | 2013-10-17 | 2013-10-17 | Die structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104550454A true CN104550454A (en) | 2015-04-29 |
Family
ID=53068128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310487749.9A Pending CN104550454A (en) | 2013-10-17 | 2013-10-17 | Die structure |
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| CN (1) | CN104550454A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391875A (en) * | 2016-12-09 | 2017-02-15 | 荆楚理工学院 | Pressing die of nose dome of missile ejection rack |
| CN106694675A (en) * | 2017-01-05 | 2017-05-24 | 滁州美业机械制造有限公司 | Refrigerator door stamping device with locating groove |
| CN108127038A (en) * | 2017-12-22 | 2018-06-08 | 东风汽车集团有限公司 | The form drawing mold and technique of a kind of beam piece |
| CN108687243A (en) * | 2018-04-27 | 2018-10-23 | 吉利汽车研究院（宁波）有限公司 | A kind of mold for realizing blocking function without locking press |
| CN109500232A (en) * | 2018-06-19 | 2019-03-22 | 广州市翔翎金属制品有限公司 | A kind of sheet metal component drawing die and sheet metal component drawing process |
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| US20030056563A1 (en) * | 2001-09-25 | 2003-03-27 | Mcclung James A. | Method and apparatus for forming container end shells |
| CN201516476U (en) * | 2009-10-19 | 2010-06-30 | 天津市津兆机电开发有限公司 | Apparatus for eliminating stretch formability stamping piece edge curling |
| CN201889361U (en) * | 2010-11-26 | 2011-07-06 | 浙江黄岩冲模厂 | Forward-drawing/reverse-drawing one-step deep-drawing die for large plastic deformation of thick plate |
| CN102310147A (en) * | 2011-09-26 | 2012-01-11 | 奇瑞汽车股份有限公司 | Molding die for processing high-tension plate parts |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030056563A1 (en) * | 2001-09-25 | 2003-03-27 | Mcclung James A. | Method and apparatus for forming container end shells |
| CN201516476U (en) * | 2009-10-19 | 2010-06-30 | 天津市津兆机电开发有限公司 | Apparatus for eliminating stretch formability stamping piece edge curling |
| CN201889361U (en) * | 2010-11-26 | 2011-07-06 | 浙江黄岩冲模厂 | Forward-drawing/reverse-drawing one-step deep-drawing die for large plastic deformation of thick plate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391875A (en) * | 2016-12-09 | 2017-02-15 | 荆楚理工学院 | Pressing die of nose dome of missile ejection rack |
| CN106694675A (en) * | 2017-01-05 | 2017-05-24 | 滁州美业机械制造有限公司 | Refrigerator door stamping device with locating groove |
| CN108127038A (en) * | 2017-12-22 | 2018-06-08 | 东风汽车集团有限公司 | The form drawing mold and technique of a kind of beam piece |
| CN108687243A (en) * | 2018-04-27 | 2018-10-23 | 吉利汽车研究院（宁波）有限公司 | A kind of mold for realizing blocking function without locking press |
| CN109500232A (en) * | 2018-06-19 | 2019-03-22 | 广州市翔翎金属制品有限公司 | A kind of sheet metal component drawing die and sheet metal component drawing process |
| CN109500232B (en) * | 2018-06-19 | 2024-04-12 | 广州市翔翎金属制品有限公司 | Sheet metal part stretching die and sheet metal part stretching method |
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