CN106694683A - Blanking and cutting die for ultrathin parts and modular cutting die forming process thereof - Google Patents
Blanking and cutting die for ultrathin parts and modular cutting die forming process thereof Download PDFInfo
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- CN106694683A CN106694683A CN201611178530.0A CN201611178530A CN106694683A CN 106694683 A CN106694683 A CN 106694683A CN 201611178530 A CN201611178530 A CN 201611178530A CN 106694683 A CN106694683 A CN 106694683A
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- cutting die
- drift
- lower tool
- tool rest
- die
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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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
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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
- B21D37/01—Selection of materials
-
- 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
- B21D37/20—Making tools by operations not covered by a single other subclass
- B21D37/205—Making cutting tools
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
The invention relates to a blanking and cutting die for ultrathin parts and a modular cutting die forming process thereof. The blanking and cutting die comprises an upper template and a lower tool apron, wherein the upper template is connected with the lower tool apron through vertical guide pillars arranged on the rear side of the lower tool apron; blanking and cutting edges are arranged in the front of the lower tool apron; punch cutting dies which work together with the blanking and cutting edges to realize blanking and cutting when the upper template is depressed are in elastic connection with the front lower side of the upper template; the punch cutting dies can move backwards during blanking and cutting; and an elastic pressing plate used for pressing a plate is further arranged on the front side of the lower tool apron. The modular cutting die forming process relates to forming methods of the punch cutting die and the lower tool apron. The blanking and cutting die for the ultrathin parts not only is compact in structure but also brings convenience for blanking and cutting the ultrathin parts, and meanwhile, the modular cutting die forming process is in favor of solving the problem of poor die precision fitting and guaranteeing the structural quality.
Description
Technical field
The present invention relates to a kind of ultra-thin part punching cutting die and its module cutting die moulding process.
Background technology
Ultra-thin part（0.008-0.01 copper aluminium is thin）Punching cutting die is a kind of high-accuracy machinery, in processing and manufacturing process
In because its high precision, quick abrasion, the reason such as cost is high limits the development level of manufacturing level always.
The flow of usual blanking die processing is all more complicated, generally comprises die blank preparation → part roughing → half
Technique and the operations such as finishing → heat treatment → finishing → mold cavity surface treatment → die assembly → upper machine debugging.
The blank preparatory stage is, for mould parts provide corresponding blank, to make processing technology, and certain processing technology will
Formulated according to the required precision of part and the type of material.In assembling process, some mould parts need to be polished and
Finishing.To the effect that by mould general assembly drawing requirement be assembled into for manufactured mould parts and standard component by die assembly
One secondary complete mould.Also need that some positions are adjusted and repaired after die trial, the product coincidence pattern for producing mould will
Ask, and mould normally can continuously work, and completion is just calculated in the processing of mould.
But traditional cooked mode for " zero clearance " in theory high speed cutting die and do not apply to, for almost pasting
The close-fitting component for closing, traditional processing mode is difficult to ensure that precision and edge of a knife quality, and a kind of ultra-thin part punching is needed for this
Cut out cutting die and its module cutting die moulding process.
The content of the invention
It is an object of the invention to provide a kind of ultra-thin part punching cutting die and its module cutting die moulding process, this is ultra-thin
Part punching cutting die not only compact conformation, and the punching cutting of ultra-thin part is conveniently used for, while module cutting die moulding process
Advantageously account for mould precision-fit problem and architecture quality.
Technical program of the present invention lies in：A kind of ultra-thin part punching cutting die, including upper die plate and lower tool rest, it is described on
The configured vertical guide pillar on rear side of lower tool rest of template is connected with lower tool rest, and the front portion of the lower tool rest is provided with punching sword
Mouthful, the underside of forward of the upper die plate is elasticly connected with the drift knife for coordinating realization punching when upper die plate is pushed with punching cutting edge
Mould, the drift cutting die can be realized being moved rearwards by when being punched, and the bullet for pushing down sheet material is additionally provided with front side of the lower tool rest
Property pressing plate.
Further, the boss for being connected with vertical guide pillar, the drift knife are provided with rear side of the lower tool rest
Be provided with rear side of mould can be vertically slidable on the front side wall of boss sliding block, the sliding block through spring and drift cutting die rear side
Wall is connected, and is additionally provided with the downside of sliding block for holding in the palm the supporting plate on the downside of drift cutting die.
Further, the both sides of the drift cutting die are respectively arranged with the vertical fin of outwardly convex, the boss
Front side wall is correspondingly arranged on the vertical chute slided with vertical fin, the width of the width more than vertical fin of the vertical chute
To cooperatively form the mobile space of drift cutting die.
Further, the briquetting being connected with the downside longitudinal sliding motion of upper die plate is provided with the upside of the drift cutting die,
The rear underside of the briquetting is fixedly connected with the sliding block on rear side of drift cutting die.
Further, the underside of forward face of the drift cutting die is in the concave up shape of falling V, the punching cutting edge of the lower tool rest
It is above removable that cutting die under the Qian type being engaged with drift cutting die is installed.
Further, the spring bearer plate is placed on the front side of drift cutting die, be provided with the upside of spring bearer plate with
The location-plate that lower tool rest is fixedly connected, stage clip is provided between the location-plate and drift cutting die.
Further, the location-plate being fixedly connected with the boss of lower tool rest is provided with the upside of the spring bearer plate, elasticity
The guide post from bottom to top through location-plate is provided with pressing plate, the upper end that the guide post passes location-plate is provided with convex annular
Portion, is provided with set and is engaged driving guide post drive spring bearer plate rising with annular protrusion on the guide bar on front side of the briquetting
U-shaped plate.
Further, the top layer of the drift cutting die is coated with carbonitride wearing layer, drift cutting die and knife mold under Qian type
There is difference of hardness and drift cutting die is made up of SKH9 mould steel, cutting die is made up of SKD11 mould steel under Qian type.
A kind of ultra-thin part is punched the module cutting die moulding process of cutting die, comprises the following steps：
1）Blanking：Skd11 light material are cut into L shapes as raw material for standby；
2）Open thick：Light material is processed into the size of needs, is distributed slightly by CNC, and light material is changed into lower tool rest and drift knife
Mould blank material, and draw out the punching cutting edge die cavity of lower tool rest and the outer shape of drift cutting die；
3）Heat treatment：Using quenching, it is tempered to lower tool rest and the heat treatment of drift cutting die；
4）Deep cooling：Subzero treatment is carried out at -70 ~ -80 DEG C after heat treatment, then temper again；
5）Wire cutting：Complete after the treatment of material, the blank of lower tool rest and drift cutting die is carried out into slow wire feeding processing with CNC；
6）Grinding：The lower tool rest blank of well cutting is ground using big water mill, drift cutting die then uses small water mill；
7）Wire cutting：Drift cutting die, lower tool rest are carried out into fast wire winding essence with CNC to cut；
8）JG/PG is processed：Coordinate/optical projection is carried out to vital part and size to bore and grind；
9）Natrual ageing：The part of shaping placed naturally in room to reduce the thermal stress in part and cold stress being dried.
Further, the step（4）Middle deep cooling process time is 10 ~ 40h；The step（5）In lower tool rest and drift
The blank of cutting die is processed by the slow wire feeding that CNC carries out 10h；The step step（6）In lower tool rest and drift cutting die pass through respectively
Cross the grinding of 4h；The step（7）Middle drift cutting die and lower tool rest cut respectively through the fast wire winding essence of 24h；The step（9）In
Part places 24h drying naturally in room.
Compared with prior art, the present invention has advantages below：The mould not only compact conformation, and can conveniently use
Cut in the punching of ultra-thin part, by moved after the elasticity of drift cutting die can ensure almost to fit and close-fitting component guarantor
Card precision and edge of a knife quality；
The moulding process of the module cutting die is applicable not only to single mold, and the mould and cutter to there is similar structures are all applicable；
More general processing method, this method can just complete a whole set of cutting die and manufacture by 4-8 people（Including design, manufacture, maintenance）,
Not only human cost has been saved while having saved financial cost；The technique can ensure the structural strength and chi of " zero clearance " mould
Very little requirement, extends the shelf life of product, reduces operating environment requirements.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is decomposing state schematic diagram of the invention；
Fig. 3 is the mated condition schematic diagram of lower tool rest of the invention and drift cutting die；
Fig. 4 is the structural representation of lower tool rest of the invention；
Fig. 5 is that drift cutting die of the invention is intended to the decomposing state of sliding block；
Fig. 6 is the structural representation of drift cutting die of the invention；
Fig. 7 is the structural representation of sliding block of the invention；
Fig. 8 is process chart of the invention；
In figure：The vertical conduit 24- of tool rest 21- punching cutting edge 22- boss 23- under the vertical guide pillar 20- of 10- upper die plates 11-
The cutting die 30- drift cutting dies trapezoidal recess 32- springs of 31- under the vertical chute 26- mobile spaces 27- Qian types of sliding shoe 25-
The vertical fin 35- angles 40- spring bearer plates 41- stage clips 42- guide posts 43- annular protrusions 44-U of 33- location holes 34-
The longitudinal T-shaped chute 62-T types block 70- location-plates 80- of template 50- sliding block 51- location hole 52- supporting plate 60- briquettings 61-
Positioning seat.
Specific embodiment
It is that features described above of the invention and advantage can be become apparent, special embodiment below, and coordinate accompanying drawing, make detailed
Carefully it is described as follows, but the present invention is not limited thereto.
Referring to figs. 1 to Fig. 7
A kind of ultra-thin part punching cutting die, including upper die plate 10 and lower tool rest 20, the upper die plate are configured in after lower tool rest
The vertical guide pillar 11 of side is connected with lower tool rest, and the front portion of the lower tool rest is provided with punching cutting edge 21, before the upper die plate
Subordinate side is elasticly connected with the drift cutting die 30 for coordinating realization punching when upper die plate is pushed with punching cutting edge, the drift cutting die punching
Can realize being moved rearwards by during sanction, the spring bearer plate 40 for pushing down sheet material is additionally provided with front side of the lower tool rest, so as to coordinate
Realize the punching of ultra-thin part.The ultra-thin part punching cutting die is the chamber of a mould two, and the front cross of lower tool rest has been arranged side by side
Two punching cutting edges.The both sides of the lower tool rest are also respectively provided with positioning seat 80.
In the present embodiment, the boss 22 for being connected with vertical guide pillar is provided with rear side of the lower tool rest, it is described convex
Vertical conduit 23 is provided with the front side wall of platform and on rear side of punching cutting edge, is provided with the vertical conduit and is slided with it
The sliding shoe 24 of cooperation, is provided with rear side of drift cutting die and is fixedly connected with sliding shoe and trapezoidal sliding block 50, drift
The trapezoidal recess 31 that the rear side of cutting die is engaged with sliding block, is provided with location hole 51, the positioning on the leading flank of the sliding block
Spring 32 is provided with hole, the spring is connected with the location hole 33 being arranged on trapezoidal recess trailing flank, the downside of sliding block
Also it is fixedly connected with for holding in the palm the supporting plate 52 on the downside of drift cutting die, to drive drift cutting die up when sliding block is up.
In the present embodiment, the both sides of the drift cutting die are respectively arranged with the vertical fin 34 of outwardly convex, described convex
The front side wall of platform and the vertical chute 25 slided with vertical fin is correspondingly arranged on the both sides of punching cutting edge, it is described perpendicular
Mobile space 26 to the width of chute more than the width of vertical fin to be moved after cooperatively forming when drift cutting die is punched.
In the present embodiment, the briquetting being connected with the downside longitudinal sliding motion of upper die plate is provided with the upside of the drift cutting die
60, the briquetting top is provided with the T-shaped chute 61 in longitudinal direction, and the T being fixedly connected with upper die plate is provided with the T-shaped chute in longitudinal direction
Type block 62, so as to cooperatively form longitudinal sliding motion connection.The rear underside of the briquetting is consolidated with the sliding block being located on rear side of drift cutting die
Fixed connection.So as to press against drift cutting die and slide block down by briquetting, and by briquetting it is movable realize sliding block before and after
Move, and cooperation is flushed to cutting die and realizes being moved rearwards by so that drift cutting die can be headed at the moment by sliding block, to ensure precision and sword
Mouth quality.
In the present embodiment, the underside of forward face of the drift cutting die is in the concave up shape of falling V, with sheet material during to be punched
Contact gradually becomes linear contact lay from a contact, and coordinates the rear shifting of drift cutting die to realize improving punching precision.The folder of the shape of falling V
Angle 35 is 172 ° ~ 178 °.Removable being provided with merges the set in punching with the matching of drift cutting die on the punching cutting edge of the lower tool rest
Cutting die 27 under Qian type on drift cutting die, the back side edge of cutting die is cutting edge when forming punching under Qian type.So as to knife under Qian type
The replacing of mould.
In the present embodiment, the trailing flank of the spring bearer plate is provided with two Qian type recesses and correspondence is placed on two drifts
The front side of cutting die, is provided with the location-plate 70 being fixedly connected with the boss of lower tool rest, the positioning on the upside of spring bearer plate
Stage clip 41 is provided between plate and drift cutting die, to provide pressure for spring bearer plate.
In the present embodiment, the guide post 42 from bottom to top through location-plate, the guiding are provided with the spring bearer plate
The upper end that bar passes location-plate is provided with annular protrusion 43, be provided with front side of the briquetting set on the guide bar with annular protrusion
The U-shaped plate 44 for driving guide post to drive spring bearer plate to rise is engaged, and will not be interfered when moving after briquetting.
In the present embodiment, the top layer of the drift cutting die is coated with carbonitride wearing layer, drift cutting die and cutting die under Qian type
It is made up of SKH9 mould steel with difference of hardness and drift cutting die, cutting die is made up of SKD11 mould steel under Qian type.
The ultra-thin part is punched the operation principle of cutting die：
1）Die opening state：Upper die plate is risen by supporting plate and spring with briquetting and sliding block, sliding block with drift cutting die；Meanwhile,
Lead column by the U-shaped strip on briquetting to rise, separated with lower tool rest with spring bearer plate from lead column is allow；
2）Matched moulds cuts：Sheet material is placed between spring bearer plate and lower tool rest, upper die plate is under the guide effect of vertical guide pillar
Descending, guide post departs from the constraint of U-shaped plate so that spring bearer plate is pressed on sheet material under the active force of stage clip；Pressing plate exists simultaneously
Drift cutting die and slide block down, the both sides lower end of drift cutting die first contacts with sheet material point, and the effect in pressure and undershoot
Head contact of the cutting die with sheet material gradually becomes linear contact lay, while under spring, the mating reaction of mobile space, drift cutting die can be to
After move one end distance so that precision and the edge of a knife quality when ensureing punching, falling where workpiece after punching from punching cutting edge
Material mouth drops.
With reference to Fig. 8
Above-mentioned ultra-thin part is punched the module cutting die moulding process of cutting die, comprises the following steps：
1）Blanking：Skd11 light material are generally cut to L shapes as raw material for standby, by sawing machine preparing raw material, not only may be used
To ensure raw materials size in the case where material is not changed, while ensureing processing efficiency, do not waste, do not influence product quality；
2）Open thick：Using traditional mechanical processing toolses, such as polish, the size that light material is processed into needs cut, by CNC
It is distributed slightly, and light material is changed into the blank material of lower tool rest and drift cutting die, and draws out punching cutting edge die cavity and the punching of lower tool rest
The outer shape of head cutting die, precision is up to 1mm or so.
3）Heat treatment：Using quenching, it is tempered to lower tool rest and the heat treatment of drift cutting die to ensure the Material Strength of product；
4）Deep cooling：To obtain the maximum hardness and dimensional stability of material, carried out at deep cooling at -70 ~ -80 DEG C after heat treatment
Reason, deep cooling process time is 10 ~ 40h, then temper again, through the die hardness of subzero treatment than normative heat treatment hardness extremely
Few 1-3HRC high（Theoretical values）.In deep cooling process, the performance of mould is improved, make hardness, toughness and resistance to
Mill property is all significantly improved.The improvement effect of cryogenics is not limited only to working surface, and it penetrates into inside workpiece, and embodiment is overall
Effect, so workpiece can be refaced, Reusability, and quenching stress and enhancing dimensional stability are also reduced to workpiece
Effect；
5）Wire cutting：Complete after the treatment of material, the blank of lower tool rest and drift cutting die carried out into slow wire feeding processing with CNC,
Slow wire feeding process time is 10h, and mould and die accuracy can be made to reach 0.5mm；
6）Grinding：Use big water mill（Common plane grinding machine）Lower tool rest blank to well cutting is ground, and makes the coarse of surface
Degree is up to 0.8mm；Drift cutting die then uses small water mill, grinding technics to complete the sharp processing of the parts such as upper and lower knife；
7）Wire cutting：Drift cutting die, lower tool rest are carried out into fast wire winding essence with CNC to cut, fast wire winding essence cuts 24h can reach precision
0.001mm；
8）JG/PG is processed：To vital part and size coordinate/optical projection is carried out to bore and grind, precision up to 0.0005MM, thus
It has been basically completed the manufacturing process of product；
9）Natrual ageing：The part of shaping placed naturally in room 24h to reduce the thermal stress in part being dried（Casting forging
The residual stress produced during making）And cold stress（The residual stress produced in mechanical processing process）；
10）Assembling：The part that will be processed is completed to assemble by mould drawing.
Presently preferred embodiments of the present invention is the foregoing is only, for the ordinary skill in the art, according to this hair
Bright teaching, designs the ultra-thin part punching cutting die and its module cutting die moulding process of multi-form and does not need creativeness
Work, it is all without departing from the principles and spirit of the present invention impartial to become according to what scope of the present invention patent was done
Change, change, replace and modification, should all belong to covering scope of the invention.
Claims (10)
1. a kind of ultra-thin part punching cutting die, including upper die plate and lower tool rest, it is characterised in that the upper die plate it is configured in
Vertical guide pillar on rear side of lower tool rest is connected with lower tool rest, and the front portion of the lower tool rest is provided with punching cutting edge, the upper die plate
Underside of forward be elasticly connected with when upper die plate is pushed with punching cutting edge coordinate realize punching drift cutting die, the drift cutting die
Can realize being moved rearwards by during punching, the spring bearer plate for pushing down sheet material is additionally provided with front side of the lower tool rest.
2. ultra-thin part according to claim 1 is punched cutting die, it is characterised in that be provided with rear side of the lower tool rest
For the boss being connected with vertical guide pillar, being provided with rear side of the drift cutting die can be vertically slidable on the front side wall of boss
Sliding block, the sliding block is connected with the rear wall of drift cutting die through spring, is additionally provided with for holding in the palm in drift on the downside of sliding block
Supporting plate on the downside of cutting die.
3. ultra-thin part according to claim 2 is punched cutting die, it is characterised in that the two side portions of the drift cutting die
The vertical fin of outwardly convex is not provided with, and the front side wall of the boss is correspondingly arranged on the vertical cunning slided with vertical fin
Groove, the width of the vertical chute is more than the width of vertical fin cooperatively forming the mobile space of drift cutting die.
4. the ultra-thin part according to Claims 2 or 3 is punched cutting die, it is characterised in that the upside of the drift cutting die
Be provided with the briquetting being connected with the downside longitudinal sliding motion of upper die plate, the rear underside of the briquetting be located at drift cutting die rear side
Sliding block be fixedly connected.
5. the ultra-thin part according to claim 1,2 or 3 is punched cutting die, it is characterised in that before the drift cutting die
Subordinate side is in the concave up shape of falling V, removable on the punching cutting edge of the lower tool rest to be provided with the Qian being engaged with drift cutting die
Cutting die under type.
6. ultra-thin part according to claim 5 is punched cutting die, it is characterised in that the spring bearer plate enclosing is in drift
The front side of cutting die, is provided with the location-plate being fixedly connected with lower tool rest, the location-plate and drift on the upside of spring bearer plate
Stage clip is provided between cutting die.
7. ultra-thin part according to claim 4 is punched cutting die, it is characterised in that the upside of the spring bearer plate is set
There is the location-plate being fixedly connected with the boss of lower tool rest, the guide post from bottom to top through location-plate be provided with spring bearer plate,
The upper end that the guide post passes location-plate is provided with annular protrusion, be provided with front side of the briquetting set on the guide bar with ring
Shape convex portion is engaged the U-shaped plate for driving guide post to drive spring bearer plate to rise.
8. ultra-thin part according to claim 5 is punched cutting die, it is characterised in that the top layer coating of the drift cutting die
There is carbonitride wearing layer, drift cutting die has difference of hardness with cutting die under Qian type and drift cutting die is made up of SKH9 mould steel, Qian type
Lower cutting die is made up of SKD11 mould steel.
9. a kind of ultra-thin part as described in claim 1,2,3,6 or 7 is punched the module cutting die moulding process of cutting die, and it is special
Levy and be, comprise the following steps：
1）Blanking：Skd11 light material are cut into L shapes as raw material for standby；
2）Open thick：Light material is processed into the size of needs, is distributed slightly by CNC, and light material is changed into lower tool rest and drift knife
Mould blank material, and draw out the punching cutting edge die cavity of lower tool rest and the outer shape of drift cutting die；
3）Heat treatment：Using quenching, it is tempered to lower tool rest and the heat treatment of drift cutting die；
4）Deep cooling：Subzero treatment is carried out at -70 ~ -80 DEG C after heat treatment, then temper again；
5）Wire cutting：Complete after the treatment of material, the blank of lower tool rest and drift cutting die is carried out into slow wire feeding processing with CNC；
6）Grinding：The lower tool rest blank of well cutting is ground using big water mill, drift cutting die then uses small water mill；
7）Wire cutting：Drift cutting die, lower tool rest are carried out into fast wire winding essence with CNC to cut；
8）JG/PG is processed：Coordinate/optical projection is carried out to vital part and size to bore and grind；
9）Natrual ageing：The part of shaping placed naturally in room to reduce the thermal stress in part and cold stress being dried.
10. ultra-thin part according to claim 9 is punched the module cutting die moulding process of cutting die, it is characterised in that institute
State step（4）Middle deep cooling process time is 10 ~ 40h；The step（5）In the blank of lower tool rest and drift cutting die entered by CNC
The slow wire feeding processing of row 10h；The step step（6）In lower tool rest and drift cutting die respectively through 4h grinding；The step
（7）Middle drift cutting die and lower tool rest cut respectively through the fast wire winding essence of 24h；The step（9）Middle part is being dried in room certainly
So place 24h.
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| CN201611178530.0A CN106694683B (en) | 2016-12-19 | 2016-12-19 | A kind of ultra-thin part punching cutting die and its module cutting die moulding process |
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| CN201611178530.0A CN106694683B (en) | 2016-12-19 | 2016-12-19 | A kind of ultra-thin part punching cutting die and its module cutting die moulding process |
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| CN113020451A (en) * | 2021-03-18 | 2021-06-25 | 苏州高泰电子技术股份有限公司 | Die and method for processing bevel edge of sheet material |
| CN114434553A (en) * | 2022-01-24 | 2022-05-06 | 深圳市常丰激光刀模有限公司 | Single-blade cutting die and machining process thereof |
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| CN113020451A (en) * | 2021-03-18 | 2021-06-25 | 苏州高泰电子技术股份有限公司 | Die and method for processing bevel edge of sheet material |
| CN114434553A (en) * | 2022-01-24 | 2022-05-06 | 深圳市常丰激光刀模有限公司 | Single-blade cutting die and machining process thereof |
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| CN106694683B (en) | 2018-09-18 |
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