CN109909372A - A kind of automotive high-performance micromotor shell no waste mine side die cutting die - Google Patents
A kind of automotive high-performance micromotor shell no waste mine side die cutting die Download PDFInfo
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- CN109909372A CN109909372A CN201910093546.9A CN201910093546A CN109909372A CN 109909372 A CN109909372 A CN 109909372A CN 201910093546 A CN201910093546 A CN 201910093546A CN 109909372 A CN109909372 A CN 109909372A
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- 239000002699 waste material Substances 0.000 title claims abstract description 34
- 238000005520 cutting process Methods 0.000 title claims abstract description 24
- 238000004080 punching Methods 0.000 claims abstract description 107
- 230000000712 assembly Effects 0.000 claims abstract description 15
- 238000000429 assembly Methods 0.000 claims abstract description 15
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 230000000750 progressive effect Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The present invention provides a kind of automotive high-performance micromotor shell no waste mine side die cutting die, including slotting tool component, upper die component and lower mold assemblies；Slotting tool component includes upper die plate and upper mold holder and slotting tool；Upper die component includes upper cavity die backing plate and fovea superior template, and cavity plate slot is offered in fovea superior template, and the left side of cavity plate slot is equipped with the punching edge of a knife, and the right side of cavity plate slot is equipped with slotting tool channel；Membrane module includes lower mold holder, lower mold backing plate, positioning punch-pin and punching component, offers punching slot in lower mold holder；Punching component includes lateral incision formed punch, take-up housing and spring, and lateral incision formed punch includes formed punch end, and formed punch end includes vertical punching face and third inclined-plane, and the side far from formed punch end is equipped with the second inclined-plane above take-up housing.Waste material of the present invention is not generated in punching, without the risk of jump-scrap and stifled waste material, improves die life.
Description
Technical field
The present invention relates to mold side die cutting techniques fields more particularly to a kind of automotive high-performance micromotor shell without useless
Expect side die cutting die.
Background technique
Mold is that modernization industry produces one of essential equipment, is known as the mother of industry.The progressive die is in mold
Most important one kind.The progressive die (also known as progressive die, progressive die) refers to press machine in one stroke, successively several different
On position, it is completed at the same time the punch die of multiple working procedure.Blanking part gradually shapes in the progressive die, and progressive forming is that process is concentrated
Process, the working procedures such as trimming, notch, grooving, punching, plastic deformation, blanking can be made to complete on a secondary mold.Root
According to the actual needs of stamping parts, multiple stamping procedures (being known as station in progressive die) are scheduled in certain sequence and carry out continuous punching
Pressure.
In stamping products production process, it often will appear the demand being punched out to product side.In the prior art, mostly it is
Treat punching position using punching cutter head to be directly punched out, inevitably generate a large amount of waste material die cuttings in this way, two these
Waste material can be fallen in mold after being punched, and the waste disposal of side punching, all more troublesome always in a mold, and processing is not
Product can be weighed wounded well, fraction defective increases, and serious mould parts can be pressed bursts, therefore the above problem of the existing technology is urgently
It is to be solved.
Summary of the invention
In view of the above-mentioned problems, the present invention provides automotive high-performance micromotor shell no waste mine side die cutting dies.
To achieve the above object, present invention employs following technical solutions:
A kind of automotive high-performance micromotor shell no waste mine side die cutting die, comprising: mutually matched slotting tool from top to bottom
Component, upper die component and lower mold assemblies.
The slotting tool component includes upper die plate that is setting up and down and being fixedly connected and upper mold holder, and is inlaid in described
Slotting tool in upper mold holder, the slotting tool are located at the right side of the upper mold holder, the slotting tool far from the upper mold holder one
End has the first inclined-plane.
The upper die component includes upper cavity die backing plate and fovea superior template setting up and down, is offered in the fovea superior template recessed
Die cavity, offers the punching edge of a knife on the left of the cavity plate slot, the right side of the cavity plate slot be equipped with through the upper cavity die backing plate with
And the slotting tool channel of the fovea superior template, the slotting tool are inserted into the slotting tool channel.
The lower mold assemblies include lower mold holder and lower mold backing plate setting up and down, are inlaid in the lower mold holder and determine
Position punch-pin and cooperate the punching component that is laterally punched with the slotting tool component, offers punching in the lower mold holder
Slot, the punching slot position are inlaid in the punching slot in the positioning male right-hand, the punching component.
The punching component includes lateral incision formed punch, take-up housing and spring, the take-up housing by the spring with it is described
Lower mold holder connection, the spring are fixed at the top of the take-up housing perpendicular to the positioning punch-pin, the lateral incision formed punch
It holds and links with the take-up housing, the lateral incision formed punch includes formed punch end, and the formed punch end is movably threaded through the positioning
In punch-pin, the formed punch end includes vertical punching face and the third inclined-plane below the vertical punching face, the sliding block
The second inclined-plane that seat top is equipped with convenient for slotting tool insertion far from the side at the formed punch end.
Wherein, the positioning punch-pin of the cavity plate slot of the upper die component and the lower mold assemblies cooperates vertically to stretch punching
Pressure, the slotting tool component drive the slotting tool to be inserted into second inclined-plane and the punching after the completion of upper die component punching press
Between slot, take-up housing transverse shifting to the left is pushed to squeeze, the lateral incision formed punch is synchronous to moving to left with the take-up housing
It employs to carry out side punching to product to be processed.
Preferably, the fovea superior template includes the first fovea superior template and the second fovea superior template spliced in parallel up and down, described
Cavity plate slot runs through the first fovea superior template and the second fovea superior template, and the top of the cavity plate slot is limited equipped with upper mold product
Block, the upper mold product limited block are inlaid in the first fovea superior template.
Preferably, tilt angle and inclined direction phase of first inclined-plane with second inclined-plane relative to vertical direction
Together, the length on first inclined-plane is greater than the length on second inclined-plane.
Preferably, the tilt angle on first inclined-plane is at least 30 degree.
Preferably, the third inclined-plane is at least 15 degree relative to the tilt angle of vertical direction.
Preferably, the gap between the formed punch end and the positioning punch-pin inner wall is less than or equal to 0.01 millimeter.
Preferably, mobilizable on the positioning punch-pin to be equipped with lower stripper, the lower stripper is located at the lower die
The top of clamping plate, the punching slot vertically run through the lower stripper, and the lateral incision formed punch accumbency is in the lower mold holder, institute
The height for stating formed punch end is higher than the height of the lower stripper upper surface, and the formed punch end be not punched out and is being punched
It is respectively positioned in the positioning punch-pin when retracting at the lateral incision formed punch.
Preferably, the take-up housing is parallel to two sides and the distance between the punching slot inner wall of the lateral incision formed punch
Less than or equal to 0.01 millimeter.
Preferably, the punching component further includes wear-resistant block, and the wear-resistant block is fixed on the bottom of the punching slot and position
Below the take-up housing.
Preferably, the punching edge of a knife and the gap being punched between face are less than or equal to 0.03 millimeter.
Compared with prior art, the invention has the benefit that using slotting tool component, upper die component, lower mold assemblies and
In lower mold assemblies punching component mutual cooperation, directly carry out side punching after the completion of product stretching and punching, make punching press and
Punching synchronously completes, time saving and energy saving；By lateral incision formed punch and the cooperation of the punching edge of a knife, only there are three faces to generate punching relationship, utilizes the
The inclination on three inclined-planes, realization are cut and continuous, and forming a folding surface is also connected on material strip, and waste material is not generated in punching, are not had
The risk of the jump-scrap of traditional handicraft and stifled waste material reduces mold maintenance cost to improve the service life of mold, improves
The quality of product.
Detailed description of the invention
Fig. 1 is that a kind of overall structure of automotive high-performance micromotor shell no waste mine side die cutting die of the invention is shown
It is intended to.
Fig. 2 is that a kind of vertical punching press of automotive high-performance micromotor shell no waste mine side die cutting die of the invention is drawn
Structural schematic diagram when stretching.
When Fig. 3 is a kind of side punching of automotive high-performance micromotor shell no waste mine side die cutting die of the invention
Structural schematic diagram.
Fig. 4 is to complete punching press using a kind of automotive high-performance micromotor shell no waste mine side die cutting die of the invention
With the schematic diagram of product structure of side punching.
Fig. 5 is schematic diagram of product structure after processing is completed.
Specific embodiment
To make to have further understanding to the purpose of the present invention, construction, feature and its function, hereby cooperate embodiment detailed
It is described as follows.
Incorporated by reference to referring to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of automotive high-performance micro machine of one embodiment of the invention
Shell no waste mine side die cutting die, including mutually matched slotting tool component, upper die component and lower mold assemblies from top to bottom.
Slotting tool component includes upper die plate 1 that is setting up and down and being fixedly connected and upper mold holder 2, and is inlaid in die clamp
Slotting tool 3 in plate 2, slotting tool 3 are located at the right side of upper mold holder 2, and slotting tool 3 has the first inclined-plane 4 far from one end of upper mold holder 2.
Upper die component includes upper cavity die backing plate 5 and fovea superior template 7 setting up and down, offers cavity plate slot in fovea superior template 7
8, the left side of cavity plate slot 8 offers the punching edge of a knife 9, and the right side of cavity plate slot 8, which is equipped with, runs through upper cavity die backing plate 5 and fovea superior template 7
Slotting tool channel 10, slotting tool 3 is inserted into slotting tool channel 10.
Lower mold assemblies include lower mold holder 12 and lower mold backing plate 13 setting up and down, the positioning being inlaid in lower mold holder 12
Punch-pin 14 and cooperate the punching component that is laterally punched with slotting tool component, punching slot 15 is offered in lower mold holder 12, is rushed
Grooving 15 is located at 14 right side of positioning punch-pin, and punching component is inlaid in punching slot 15.Being punched component includes lateral incision formed punch 16, sliding block
Seat 17 and spring 18, take-up housing 17 are connect by spring 18 with lower mold holder 12, and spring 18 is perpendicular to positioning punch-pin 14, lateral incision
Formed punch 16 is fixed at the top of take-up housing 17 and links with take-up housing 17, and lateral incision formed punch 16 includes formed punch end 19, formed punch end
19 are movably threaded through in positioning punch-pin 14, and formed punch end 19 includes being punched face 20 vertically and being located at below vertical punching face 20
Third inclined-plane 21, the top of take-up housing 17 is equipped with the second inclined-plane 22 being inserted into convenient for slotting tool 3 far from the side at formed punch end 19.
Wherein, the positioning punch-pin 14 of the cavity plate slot 8 of upper die component and lower mold assemblies cooperates to vertical stretching and punching, slotting tool
Component band active slotting-tool 3 after the completion of upper die component punching press is inserted between the second inclined-plane 22 and punching slot 15, is slided to squeeze to push
The transverse shifting to the left of block 17, lateral incision formed punch 16 is synchronized with take-up housing 17 to be moved to the left to carry out side to product 23 to be processed
Punching forms the bending side 26 of three faces incision, and then completes no waste mine punching, and the structure after the completion of specific side punching is as schemed
Shown in 4.
The present invention in process of production, as shown in Figure 1, the downward punching press of upper die component before this, lower mold assemblies and upper die component
Punching stretch work is first completed in cooperation, specific as shown in Figure 2；After the completion of stamping procedure shown in Fig. 2, upper die component pushes down material
The product to be processed 23 taken, slotting tool component move down, and slotting tool 3, to lower punching press, is inserted into take-up housing 17 in slotting tool channel 10
On the second inclined-plane 22 on, and then compressive zone movable slider seat 17 is moved laterally left with lateral incision formed punch 16, to product 23 to be processed
Side punching is carried out, formed punch end 19 is poured in the punching edge of a knife 9, due to being punched the cooperation in face 20 and third inclined-plane 21 vertically, is formed
The two sides and the face of top three at formed punch end 19 are cut, and the corresponding one side in third inclined-plane 21 is not punched out, and forms a bending side
It is connected on material strip, it is specific to be cut and continuous as shown in figure 3, realizing in turn, rise slotting tool component later, by slotting tool 3 from the second inclined-plane
It extracts at 22, is resetted take-up housing 17 using spring 18, and then formed punch end 19 is returned in positioning punch-pin 14, complete punching,
Structure after the completion of punching is as shown in Figure 4.Product as shown in Figure 5 is finally obtained through rotary-cut trimming again after the completion of the punching of side
27.Mold of the invention is avoided that waste material generation when being punched, the risk of jump-scrap and stifled waste material without traditional handicraft,
To improve the service life of mold, mold maintenance cost is reduced, the quality of product is improved.
Preferably, fovea superior template 7 includes the first fovea superior template 71 and the second fovea superior template 72 spliced in parallel up and down, cavity plate
Slot 8 runs through the first fovea superior template 71 and the second fovea superior template 72, and the top of cavity plate slot 8 is equipped with upper mold product limited block 24, upper mold
Product limited block 24 is inlaid in the first fovea superior template 71.Upper mold product limited block 24 is further to resist and squeeze to be processed
Product 23, completes the stretching and punching to product 23 to be processed, and fovea superior template 7 is divided into the first fovea superior template 71 and the second fovea superior template
72 two parts convenient for the segmentation fractionation maintenance when mold is stuck and release peace that is stuck, while being convenient for upper mold product limited block 24
Dress and replacement.
Preferably, the first inclined-plane 4 is identical relative to the tilt angle a and inclined direction of vertical direction as the second inclined-plane 22,
And then the face contact of slotting tool 3 and take-up housing 17 is formed, it is more uniformly stressed take-up housing 17, the first inclined-plane 4 and the second inclined-plane 22
It cooperates, is converted into the lateral impact force of take-up housing 17 using the downward impact force of slotting tool 3, take-up housing 17 drives lateral incision formed punch
16 transverse shiftings are completed to be punched the side of product 23 to be processed；The length on the first inclined-plane 4 is greater than the length on the second inclined-plane 22,
It can guarantee that take-up housing 17 is pushed forward enough distances by slotting tool 3, and then complete side punching, if the length on the first inclined-plane 4
Less than the length on the second inclined-plane 22, then possible slotting tool 3 is inserted directly between take-up housing 17 and bottom knock out bar side wall, can not be by lateral incision
Formed punch 16 pushes ahead enough distances.
Preferably, the tilt angle a on the first inclined-plane 4 is at least 30 degree, can be after the insertion of slotting tool 3 as early as possible by lateral incision formed punch 16
It is pushed into the no waste mine punching edge of a knife 9, punching is completed, if the tilt angle a on the first inclined-plane 4 is too small, needs to do on the first inclined-plane 4
Long enough could meet demand, but be punched 15 depth of slot it is limited, so will appear slotting tool 3 be inserted into punching 15 bottom of slot when still without
Method completes punching, therefore tilt angle a cannot be less than 30 degree.
Preferably, third inclined-plane 21 is at least 15 degree relative to the tilt angle b of vertical direction, guarantees after the completion of being punched
Redundance can avoid involving far from the enough distances of product.
Preferably, the gap between formed punch end 19 and positioning 14 inner wall of punch-pin is less than or equal to 0.01 millimeter, can guarantee side
The precision of punching avoids formed punch end 19 when punching from deviateing, causes punching error.
Preferably, it positions on punch-pin 14 and is movably equipped with lower stripper 11, lower stripper 11 is located at lower mold holder 12
Top, punching slot 15 vertically run through lower stripper 11, in lower mold holder 12, lower stripper 11 is set 16 accumbency of lateral incision formed punch
It sets convenient for taking off product 23 to be processed and material strip from positioning punch-pin after product 23 to be processed completes punching press lateral incision；Formed punch end
19 height is higher than the height of 11 upper surface of lower stripper, directly can carry out side to product 23 to be processed after the completion of punching stretch
Face punching is unable to complete side punching if formed punch end 19 is lower than lower stripper 11；And formed punch end 19 not being punched out and
Punching is completed to be respectively positioned on when lateral incision formed punch 16 retracts in positioning punch-pin 14, can guarantee when being punched without side, does not influence to erect
The progress to work to stretching and punching.
Preferably, take-up housing 17 is parallel to the two sides of lateral incision formed punch 16 and punching the distance between 15 inner wall of slot is less than etc.
In 0.01 millimeter, it can guarantee the precision of side punching, avoid when slotting tool 3 is downwardly into, take-up housing 17 produces in punching slot 15
Raw offset, the related offset for causing lateral incision formed punch 16 in turn result in punching error.
Preferably, punching component further includes wear-resistant block 25, and wear-resistant block 25 is fixed on the bottom of punching slot 15 and is located at sliding block
17 lower section of seat, the addition of wear-resistant block 25 can reduce abrasion of the take-up housing 17 to lower mold holder 12, and then improve lower mold holder 12
Service life reduces mold maintenance cost.
Preferably, it is punched the edge of a knife 9 and the gap being punched between face is less than or equal to 0.03 millimeter, lesser gap can guarantee
The non-blanking area of product 25 to be processed is indeformable in blanking process.
From the above mentioned, a kind of automotive high-performance micromotor shell no waste mine side die cutting die of the invention, using insert
The mutual cooperation of punching component in knife assembly, upper die component, lower mold assemblies and lower mold assemblies, is completed in product stretching and punching
Side punching is directly carried out afterwards, synchronously completes stamping and blanking, it is time saving and energy saving；Only by lateral incision formed punch and the cooperation of the punching edge of a knife
There are three faces to generate punching relationship, and using the inclination on third inclined-plane, realization is cut and continuous, forms a folding surface and is also connected in material strip
On, waste material is not generated in punching, the risk of jump-scrap and stifled waste material without traditional handicraft, to improve the use of mold
Service life reduces mold maintenance cost, improves the quality of product.
The present invention is described by above-mentioned related embodiment, however above-described embodiment is only to implement example of the invention.
It must be noted that the embodiment disclosed is not limiting as the scope of the present invention.On the contrary, do not depart from spirit of the invention and
It is changed and retouched made by range, belongs to scope of patent protection of the invention.
Claims (10)
1. a kind of automotive high-performance micromotor shell no waste mine side die cutting die, characterized by comprising: phase from top to bottom
Slotting tool component, upper die component and the lower mold assemblies mutually cooperated；
The slotting tool component includes upper die plate that is setting up and down and being fixedly connected and upper mold holder, and is inlaid in the upper mold
Slotting tool in clamping plate, the slotting tool are located at the right side of the upper mold holder, and the slotting tool has far from one end of the upper mold holder
There is the first inclined-plane；
The upper die component includes upper cavity die backing plate and fovea superior template setting up and down, is offered on the upper cavity die backing plate recessed
Die cavity offers the punching edge of a knife on the left of the cavity plate slot, and the right side opening of the cavity plate slot, which is equipped with, runs through the upper cavity die backing plate
And the slotting tool channel of the fovea superior template, the slotting tool are inserted into the slotting tool channel；
The lower mold assemblies include lower mold holder and lower mold backing plate setting up and down, the convex being inlaid in the lower mold holder
Mould and cooperate the punching component that is laterally punched with the slotting tool component, offers punching slot, institute in the lower mold holder
Punching slot position is stated in the positioning male right-hand, the punching component is inlaid in the punching slot；
The punching component includes lateral incision formed punch, take-up housing and spring, and the take-up housing passes through the spring and the lower die
Clamping plate connection, the spring are fixed at the top of the take-up housing simultaneously perpendicular to the positioning punch-pin, the lateral incision formed punch
It links with the take-up housing, the lateral incision formed punch includes formed punch end, and the formed punch end is movably threaded through the positioning punch-pin
Interior, the formed punch end includes vertical punching face and the third inclined-plane below the vertical punching face, on the take-up housing
The second inclined-plane that side is equipped with convenient for slotting tool insertion far from the side at the formed punch end；
Wherein, the positioning punch-pin of the cavity plate slot of the upper die component and the lower mold assemblies cooperates to vertical stretching and punching, institute
State slotting tool component driven after the completion of the upper die component punching press slotting tool be inserted into second inclined-plane and the punching slot it
Between, take-up housing transverse shifting to the left is pushed to squeeze, the lateral incision formed punch is synchronized with the take-up housing is moved to the left use
To carry out side punching to product to be processed.
2. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that: institute
Stating fovea superior template includes the first fovea superior template and the second fovea superior template spliced in parallel up and down, and the cavity plate slot runs through described first
Fovea superior template and the second fovea superior template, the top of the cavity plate slot are equipped with upper mold product limited block, the upper mold product limit
Position block is inlaid in the first fovea superior template.
3. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that: institute
It is identical relative to the tilt angle and inclined direction of vertical direction as second inclined-plane to state the first inclined-plane, first inclined-plane
Length is greater than the length on second inclined-plane.
4. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that: institute
The tilt angle for stating the first inclined-plane is at least 30 degree.
5. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that: institute
It states third inclined-plane and is at least 15 degree relative to the tilt angle of vertical direction.
6. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that: institute
The gap stated between formed punch end and the positioning punch-pin inner wall is less than or equal to 0.01 millimeter.
7. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that: institute
It states and is movably equipped with lower stripper on positioning punch-pin, the lower stripper is located at the top of the lower mold holder, the punching
Grooving vertically runs through the lower stripper, and in the lower mold holder, the height at the formed punch end is high for the lateral incision formed punch accumbency
Height in the lower stripper upper surface, and the formed punch end be not punched out and is being punched the completion lateral incision formed punch time
It is respectively positioned on when moving back in the positioning punch-pin.
8. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that: institute
State that take-up housing is parallel to the two sides of the lateral incision formed punch and the distance between the punching slot inner wall is less than or equal to 0.01 millimeter.
9. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that: institute
Stating punching component further includes wear-resistant block, and the wear-resistant block is fixed on the bottom of the punching slot and is located at below the take-up housing.
10. automotive high-performance micromotor shell no waste mine side as described in claim 1 die cutting die, it is characterised in that:
The punching edge of a knife and the gap being punched between face are less than or equal to 0.03 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093546.9A CN109909372B (en) | 2019-01-30 | 2019-01-30 | Waste-free side punching die for high-performance micro-motor shell for automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910093546.9A CN109909372B (en) | 2019-01-30 | 2019-01-30 | Waste-free side punching die for high-performance micro-motor shell for automobile |
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| CN109909372A true CN109909372A (en) | 2019-06-21 |
| CN109909372B CN109909372B (en) | 2024-02-02 |
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| CN111822788A (en) * | 2020-07-09 | 2020-10-27 | 万盛兴精密技术（惠州）有限公司 | Local thinning die of workpiece and forming control method |
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| CN110434220A (en) * | 2019-09-03 | 2019-11-12 | 深圳数码模汽车技术有限公司 | A kind of chair framework inclined-plane die cutting die and its processing method |
| CN110434220B (en) * | 2019-09-03 | 2024-05-03 | 深圳数码模汽车技术有限公司 | Seat framework inclined plane punching die and processing method thereof |
| CN110756656A (en) * | 2019-10-17 | 2020-02-07 | 珠海格力精密模具有限公司 | Continuous die punching and cutting assembly, in-die discharging structure and continuous die |
| CN111822788A (en) * | 2020-07-09 | 2020-10-27 | 万盛兴精密技术（惠州）有限公司 | Local thinning die of workpiece and forming control method |
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