CN106424296B - A double-sided burr-free punching process for a metal strip and a burr-free punching die - Google Patents
A double-sided burr-free punching process for a metal strip and a burr-free punching die Download PDFInfo
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- CN106424296B CN106424296B CN201611080371.0A CN201611080371A CN106424296B CN 106424296 B CN106424296 B CN 106424296B CN 201611080371 A CN201611080371 A CN 201611080371A CN 106424296 B CN106424296 B CN 106424296B
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- 238000004080 punching Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000002184 metal Substances 0.000 title abstract description 9
- 229910052751 metal Inorganic materials 0.000 title abstract description 9
- 239000000463 material Substances 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 abstract description 9
- 239000007769 metal material Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
本发明旨在提供一种一种五金带料双面无毛刺冲裁工艺以及无毛刺冲裁模具，通过将五金带料进行冲裁深度不大于带料厚度一半的预断冲裁，而后将落料顶回带料，实现了落料以及带料两侧面边缘均产生塑性变形的R圆角，且使两侧面R圆角根部产生由金属疲劳以及拉伸复合作用导致的的不完全断裂分离，与冲裁拉伸导致的断裂分离具有原理上的突破，从金属材料成型的原理上避免了毛刺的产生；而后，将落料由带料上顶出，此时金属带料与落料在第一步不完全分离的基础上产生完全分离，该步骤也无毛刺产生。
The present invention aims to provide a double-sided burr-free punching process for metal strips and a burr-free punching die. The metal strips are pre-cut with a punching depth of no more than half the thickness of the strips, and then the blanks are pushed back into the strips, so that R-fillets with plastic deformation are achieved on the edges of both sides of the blanks and the strips, and incomplete fracture separation is caused by the combined action of metal fatigue and stretching at the roots of the R-fillets on both sides, which is a breakthrough in principle compared with the fracture separation caused by punching and stretching, and avoids the generation of burrs based on the principle of metal material forming; then, the blanks are pushed out from the strips, and at this time, the metal strips and the blanks are completely separated on the basis of the incomplete separation in the first step, and no burrs are generated in this step either.
Description
Technical field
The present invention relates to metal stamping die technical fields, and in particular to a kind of two-sided impulse- free robustness punching process of hardware strip
And impulse- free robustness blanking die.
Background technique
In hardware products punching process, hardware strip becomes from flexible deformation to plasticity under the effect of punch-die shearing
Shape arrives fracture separation again.Due to the presence of clearance between punch and die, exceed the flash of sheet thickness when material is pulled off in detaching direction
Part is commonly known as burr or batch cutting edge of a knife or a sword.
The burr or burr easily scratch operator in hardware products production, and easy to fall off after hardware products assembling
It is short-circuit, dirty etc. bad so as to cause circuit board.
For this problem, there are two types of the ways of the prior art:
(1) punching depth is first carried out to hardware strip and prejudges punching no more than material thickness, then, is prejudging the next of punching
Work step is punched completely along the trace for prejudging punching, realizes blanking；This kind of mode can reduce the generation of burr, but not
Burr can thoroughly be eliminated.
(2) Chinese invention patent application of Patent No. CN201310005405.X discloses a kind of impulse- free robustness processing mould
Tool, including upper die and lower die, the upper mold include the upper cover plate from top to bottom set gradually, upper die holder, upper padding plate, upper clamp plate,
Baffle plate and stripper plate, the lower die include the lower die holder, lower bolster and lower template set gradually from the bottom to top, and the lower die is set
It is equipped with blanking mechanism and waste port, the upper mold is provided with the feeding pressure mechanism and the corresponding waste port of the corresponding blanking mechanism
Formed punch two.
The difference of impulse- free robustness processing mold and common die that second technical solution provides is, mold first time punching press
Formed punch be mounted on lower template, waste material jacks up from the bottom up, then is ejected waste material from top to bottom by two times punch；This kind of skill
Art scheme is substantially to carry out primary thorough punching press to waste material, then waste material is connected in strip, interference fit is fixed；Have
Following problem: (1) during strip is transported, waste material, which easily falls off, leads to the press mold that gets stuck；(2) due to being substantially primary thoroughly punching
Pressure, burr can not completely remove, and fail the technical effect for being really achieved impulse- free robustness punching.
Summary of the invention
The present invention is intended to provide a kind of two-sided impulse- free robustness punching process of hardware strip and impulse- free robustness blanking die, with
Solve the problems, such as that existing hardware products have burr.
Concrete scheme is as follows: a kind of two-sided impulse- free robustness punching process of hardware strip, which comprises the steps of:
S1: strip being carried out to prejudge punching, which is not more than the half of the strip thickness, with shape
At the blanking of the endless total detachment strip；
S2: the blanking is headed into the strip with the direction for prejudging punching in reverse step S1, so that the blanking is connected in this
In strip；
S3: by the blanking of step S2 by ejecting in the strip, and then two-sided carrot-free blanking is made.
Further, in step S1, prejudge in blanking process at this, which contradicts bearing by elasticity always.
Further, in step S1, which is the 10%-15% of the strip thickness.
Further, in step S2, which is headed into completely in the strip, so that the two-sided and strip of the blanking is double
Face difference is coplanar.
Further, in step S3, the strip is to prejudge the direction of punching by ejecting in strip.
1. simultaneously, the invention also discloses a kind of hairless dot punches for realizing the two-sided impulse- free robustness punching process of above-mentioned hardware strip
Mold is cut out, is punched for hardware strip, including upper mold and lower die, the upper mold include cope plate, stripper plate, which includes
There are lower die holder and lower template；It is characterized by also including prejudging device, this prejudge device include be installed on it is pre- on cope plate
Disconnected punch-pin is adapted to this and prejudges punch-pin and be installed in the lower template and prejudges cavity plate；Under upper and lower mould molding state, this prejudges punch-pin
The half that stripper plate length is not more than strip thickness is protruded out, prejudges punching to carry out punching depth no more than strip thickness half
It cuts out；This, which is prejudged, is equipped with a movable jacking block in cavity plate, an elastic component for contacting at the jacking block, the elastic component are equipped in the lower die holder
The jacking block is acted on, the blanking prejudged after being punched is headed into strip.
Further, under upper and lower mould molding state, this is prejudged punch-pin and protrudes out the 10%- that stripper plate length is strip thickness
15%, so that this prejudges the 10%-15% that punch-pin punching depth is strip thickness.
It further, further include that device is prejudged with this along the spaced liftout attachment in strip feed direction, the ejection
Device includes the ejection punch-pin being installed on cope plate and is adapted to the ejection cavity plate that the ejection punch-pin is installed in the lower template.
Further, which is spring, which contacts at the jacking block so that the upper end of the jacking block with this prejudge it is recessed
The edge of a knife of mould is coplanar.
The two-sided impulse- free robustness punching process of hardware strip of the invention and impulse- free robustness blanking die, by by hardware strip into
No more than the punching of prejudging of strip thickness half, (this prejudges the punching depth of punching according to material self-characteristic tune to row punching depth
It is whole, wherein preferred, which is the 10%-15% of the strip thickness), blanking top is then rewinded into material,
It realizes blanking and strip two sides edge generates the R fillet of plastic deformation, and generate two sides R fillet root by gold
Belong to fatigue and stretch incomplete fracture separation caused by compound action, fracture separation caused by stretching with punching has principle
On breakthrough, the generation of burr is avoided from the principle of metal material moulding；Then, by blanking by being ejected in strip, at this time
Metal belting and blanking generate on the basis of the first step is not completely separated to be kept completely separate, and also impulse- free robustness generates the step.
The two-sided impulse- free robustness punching process of hardware strip of the invention realizes the two-sided carrot-free technology effect of hardware products
Fruit, processing step is simple, can be fully automated punching realizes；Realize the impulse- free robustness blanking die of the processing step, mould structure
Simply, manufacturing cost is cheap；Prejudge in punching, the endless total detachment hardware strip of blanking, it is thus also avoided that press mold caused by vibration etc.
Equal productions problem.
Detailed description of the invention
Fig. 1 shows two impulse- free robustness blanking die structural schematic diagram of the embodiment of the present invention；
Device, which is prejudged, Fig. 2 shows Fig. 1 prejudges blanking structure schematic diagram；
Fig. 3 shows Fig. 2 partial enlarged view；
Fig. 4, which shows Fig. 1 and prejudges device, heads into material-strap structure schematic diagram for blanking；
Fig. 5 shows liftout attachment structural schematic diagram.
Specific embodiment
To further illustrate that each embodiment, the present invention are provided with attached drawing.These attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be cooperated to explain the operation principles of embodiment.Cooperation ginseng
These contents are examined, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention.In figure
Component be not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Now in conjunction with the drawings and specific embodiments, the present invention is further described.
Embodiment one
This embodiment disclose a kind of two-sided impulse- free robustness punching process of hardware strip, include the following steps:
Step S1 prejudges punching
Hardware strip is packed into stamping die, along vertically downward direction, prejudging formed punch and prejudge recessed by hardware dies
Mould carries out strip to prejudge punching, which is not more than the half of the strip thickness, it is preferred that this is prejudged
The punching depth of punching is the 10%-15% of the strip thickness, to form the blanking of the endless total detachment strip.
And the planarization to guarantee blanking, this, which is prejudged cavity plate face and prejudges in the membrane cavity of formed punch also adaptation, sets flexible top
Block, to contradict in the bottom surface of hardware strip, to prejudge in blanking process at this, which contradicts bearing by elasticity always.
Step S2, roof fall material
After the completion of step S1, stamping die die sinking makes to prejudge formed punch rise, meanwhile, elastic jacking block is made in elastic force
It follows this to prejudge formed punch rise under, and the blanking is headed into the strip to prejudge the direction of punching in reverse step S1, and push up
Block flushes in prejudge cavity plate after stop, heading into the blanking completely in the strip, two-sided point of the two-sided and strip of the blanking
It is not coplanar；Blanking is connected in the strip.
S3, ejection
The stamping die send hardware strip to next work step, molds again, and to eject punch-pin, ejection cavity plate is punched again
By the blanking of step S2 by ejecting in the strip, and then two-sided carrot-free blanking is made in the blanking.In this step, it ejects
Punch-pin is fixed on upper mold, so that the strip is to prejudge the direction of punching by ejecting in strip.
Inventor probes by many experiments and burr generative theory is combined to analyze:
According to above-mentioned processing step, it is greater than strip thickness 50% when prejudging punching punching depth, it may appear that blanking can be by strip
On completely disengage phenomenon, cause compression mould, simultaneously:
| It is punched depth | 10% | 12.5% | 15% |
| Copper material strip | Two-sided impulse- free robustness | Two-sided impulse- free robustness, and two-sided fillet is smooth | Two-sided impulse- free robustness |
| Stainless steel strip | Two-sided impulse- free robustness | Two-sided impulse- free robustness, and two-sided fillet is smooth | Two-sided impulse- free robustness |
Punching is prejudged no more than strip thickness half by the way that hardware strip is carried out punching depth, this prejudges punching
It is punched depth to be adjusted according to material self-characteristic, wherein preferred, which is the strip thickness
Blanking top is then rewinded material by 10%-15%, realizes blanking and strip two sides edge generates the R fillet of plastic deformation,
And two sides R fillet root is made to generate as metal fatigue and stretch incomplete fracture separation caused by compound action, with punching
Fracture separation caused by stretching is cut out with the breakthrough in principle, the generation of burr is avoided from the principle of metal material moulding；
Then, by blanking by ejecting in strip, metal belting and blanking generate completely on the basis of the first step is not completely separated from this time
Separation, also impulse- free robustness generates the step.
Embodiment two
In conjunction with Fig. 1, this embodiment disclose a kind of realize to weigh the two-sided impulse- free robustness punching process of embodiment First Five-Year Plan gold ribbon material
Impulse- free robustness blanking die, including upper mold and lower die, the upper mold include cope plate 40 and stripper plate 30, which includes
Lower die holder 10 and lower template 20；In the impulse- free robustness blanking die, along the feed direction of hardware strip 3, it is disposed with and prejudges
Device and liftout attachment.
In conjunction with Fig. 1 to Fig. 3, it includes being installed on prejudging punch-pin 1, being adapted to this and prejudge punch-pin on cope plate 40 that this, which prejudges device,
1 is installed in the lower template 20 and prejudges cavity plate 2, this, which is prejudged, is equipped with one and can slide up and down movable jacking block 4 in cavity plate 2, under this
An elastic component 5 for contacting at the jacking block 4 is equipped in die holder 10.
This prejudges punch-pin 1, prejudges cavity plate 2 is correspondingly arranged along molding direction, and this is prejudged punch-pin 1 and prejudges 2 phase of cavity plate
The one punching edge of a knife is cooperatively formed to side；And under upper and lower mould molding state, this is prejudged punch-pin 1 and protrudes out the stripper plate 30, and
The protruding length is the 10%-15% of the material thickness of strip 3, and then can realize that this prejudges punch-pin punching depth is 3 thickness of strip
10%-15%.
The elastic component 5 is spring, which contacts at the jacking block 4 by structures such as thimbles, the external shape fits of the jacking block 4 in
Prejudge the edge of a knife profile of cavity plate 2, and under the effect of the elastic force of the spring, the upper end of the jacking block 4 and the edge of a knife for prejudging cavity plate 2 are total
Face.
In conjunction with Fig. 5, which includes the ejection punch-pin 7 being installed on cope plate 40 and is adapted to the ejection punch-pin
7 are installed on the ejection cavity plate 8 in the lower template 20, and the blanking 6 for being prejudged punching is thoroughly punched in the liftout attachment, with reality
Existing blanking.
In conjunction with Fig. 2 to Fig. 5, the impulse- free robustness blanking die working principle of the embodiment is as follows:
(1) mold for the first time: strip 3 is fixed by lower template 20 and stripper plate 30, and part uses blanking form, on
Mould descending phase and common punching press prejudge 1 punching press strip 3 of punch-pin, without what difference to generate blanking 6, the following meeting of blanking 6
Normal first blanking fillet R1 is generated, completely after molding, punching depth reaches the 10%-15% of material thickness.
(2) be opened for the first time: upper mold uplink, prejudging 1 uplink of punch-pin, lower die jacking block 4 will under the action of elastic component 5 simultaneously
The blanking 6 swept away jacks up upwards, then part heads into material strip when jacking up, and reserved part is formed on part top under a stretching force
Second blanking fillet R2,6 peripheral edge portion of blanking is connected in strip 3 at this time, is detached from blanking 6 up to prejudging punch-pin 1, at this time jacking block
4 is concordant with 2 edge of a knife of cavity plate is prejudged, and the two sides of blanking 6 are coplanar with 3 two sides of strip respectively.
(3) material strip 3 is conveyed a work step by feeder, and blanking 6 follows material strip to enter next work step, and ejection punch-pin 7 cooperates
Ejection cavity plate ejects blanking 6 from material strip 3, while guaranteeing that part and material strip will not deform.According to said method produce
Part top and bottom have natural fillet without generating burr.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (9)
1. a kind of two-sided impulse- free robustness punching process of hardware strip, which comprises the steps of:
S1: strip being carried out to prejudge punching, which is not more than the half of the strip thickness, to be formed not
Completely disengage the blanking of the strip；
S2: the blanking is headed into the strip with the direction for prejudging punching in reverse step S1, so that the blanking is connected in the strip
On, so that blanking and strip two sides edge is generated the R fillet of plastic deformation；
S3: by the blanking of step S2 by ejecting in the strip, and then two-sided carrot-free blanking is made.
2. the two-sided impulse- free robustness punching process of hardware strip according to claim 1, it is characterised in that: in step S1, at this
Prejudge in blanking process, which contradicts bearing by elasticity always.
3. the two-sided impulse- free robustness punching process of hardware strip according to claim 1, it is characterised in that: in step S1, this is pre-
The punching depth of disconnected punching is the 10%-15% of the strip thickness.
4. the two-sided impulse- free robustness punching process of hardware strip according to claim 1, it is characterised in that: in step S2, this is fallen
Material is headed into completely in the strip, so that the two-sided difference of the two-sided and strip of the blanking is coplanar.
5. the two-sided impulse- free robustness punching process of hardware strip according to claim 1, it is characterised in that: in step S3, the band
Material is to prejudge the direction of punching by ejecting in strip.
6. a kind of impulse- free robustness blanking die for realizing any two-sided impulse- free robustness punching process of hardware strip of claim 1-5,
It is punched for hardware strip, including upper mold and lower die, the upper mold include cope plate, stripper plate, which includes lower die
Seat and lower template；It is characterized by also including prejudging device, this prejudge device include be installed on cope plate prejudge it is convex
Mould is adapted to this and prejudges punch-pin and be installed in the lower template and prejudges cavity plate；Under upper and lower mould molding state, this is prejudged punch-pin and protrudes out
Stripper plate length is not more than the half of strip thickness out, prejudges punching to carry out punching depth no more than strip thickness half；
This, which is prejudged, is equipped with a movable jacking block in cavity plate, an elastic component for contacting at the jacking block is equipped in the lower die holder, which makees
For the jacking block, the blanking prejudged after being punched is headed into strip, blanking and strip two sides edge is made to generate plasticity change
The R fillet of shape.
7. impulse- free robustness blanking die according to claim 6, it is characterised in that: under upper and lower mould molding state, this prejudges convex
Mould protrudes out the 10%-15% that stripper plate length is strip thickness, so that it is strip thickness that this, which prejudges punch-pin punching depth,
10%-15%.
8. impulse- free robustness blanking die according to claim 6, it is characterised in that: further include prejudging device with this along the strip
The spaced liftout attachment of feed direction, the liftout attachment include the ejection punch-pin being installed on cope plate and are adapted to the top
Punch-pin is installed on the ejection cavity plate in the lower template out.
9. impulse- free robustness blanking die according to claim 6, it is characterised in that: the elastic component is spring, which contradicts
In the jacking block, so that the upper end of the jacking block is coplanar with the edge of a knife for prejudging cavity plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080371.0A CN106424296B (en) | 2016-11-30 | 2016-11-30 | A double-sided burr-free punching process for a metal strip and a burr-free punching die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611080371.0A CN106424296B (en) | 2016-11-30 | 2016-11-30 | A double-sided burr-free punching process for a metal strip and a burr-free punching die |
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| Publication Number | Publication Date |
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| CN106424296A CN106424296A (en) | 2017-02-22 |
| CN106424296B true CN106424296B (en) | 2019-02-01 |
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| CN106424296A (en) | 2017-02-22 |
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