CN104325001B - A kind of automatic punching machine and processing method for stamping thereof - Google Patents

A kind of automatic punching machine and processing method for stamping thereof Download PDF

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Publication number
CN104325001B
CN104325001B CN201410625117.9A CN201410625117A CN104325001B CN 104325001 B CN104325001 B CN 104325001B CN 201410625117 A CN201410625117 A CN 201410625117A CN 104325001 B CN104325001 B CN 104325001B
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China
Prior art keywords
processed
driving
punching machine
automatic punching
mold
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CN201410625117.9A
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CN104325001A (en
Inventor
贾金果
傅彬
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KUNSHAN LONGPENG PRECISION ELECTRONICS Co Ltd
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KUNSHAN LONGPENG PRECISION ELECTRONICS Co Ltd
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/02Punching blanks or articles with or without obtaining scrap; Notching
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/02Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14Dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003Positioning devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/20Storage arrangements; Piling or unpiling

Abstract

The present invention is a kind of automatic punching machine and processing method thereof, it includes supporting seat, it is positioned at the decompressor on described support seat, described automatic punching machine also includes being positioned on described support seat and for depositing raw-material storage device, between described storage device and described decompressor and be used for carrying raw-material pay-off, for the blanking device of blanking and for collecting the material-gathering device of machined complete material after being positioned at decompressor, described decompressor includes first locating dowel with positioning function, there is the pressing plate correcting positioning function, it is provided with the lower mold of wind inlet.The present invention designs double-positioning device and has the mould of the firm function of leveling so that punching precision increases substantially, and the whole course of processing is full-automatic process, i.e. saves labour force, improves again production efficiency, and improve the quality of product.

Description

A kind of automatic punching machine and processing method for stamping thereof
[technical field]
The invention belongs to stamping technology field, particularly relate to a kind of automatic punching machine and punch process thereof Method.
[background technology]
At present, punch press be suitable for blanking, punching, shape, bend, the multiple cold stamping work such as shallow stretching The realization of skill, be widely used in electronic component, instrument and meter, hardware & tools, toy, vehicle, The industrial circles such as machinery, family's facility.In the punch press process of soft board material, due to most of punching Side Press is the heaviest, transport inconvenience in multilayer processing workshop;And the bearing capacity for floor has Higher requirement;Most material feeding and blanking process are required for manual operation, and production efficiency is relatively Low;When extracting soft board and being processed, often due to the electrostatic between soft board so that sucker is drawn Its lower floor of soft board also superposition several layers soft board, brings inconvenience to processing;Relatively thin plate this for soft board When material carries out punching press, need the high-precision location to material, high-quality leveling and consolidate reliably, And the most current most of punch presses all cannot accomplish the guarantee of above many aspects.
Therefore, it is necessary to provide a kind of new automatic punching machine and processing method thereof to solve the problems referred to above.
[summary of the invention]
Present invention is primarily targeted at offer a kind of full automatic, automatic punching machine of accurate positioning and Its processing method.
The present invention is achieved through the following technical solutions above-mentioned purpose: a kind of automatic punching machine, described automatically Stamping machine also include being positioned on described support seat and for deposit material to be processed storage device, between Between described storage device and described decompressor and for carrying the pay-off of material to be processed, position For the blanking device of blanking and for collecting the dress that gathers materials of machined complete material after decompressor Putting, described decompressor includes constituting the first workbench and second workbench of frame structure, being positioned at institute Lower mold, the first locating dowel being positioned at described lower mold both sides of stating the first worktable upper surface, be positioned at described Below first locating dowel and be fixed on the first driving means of described first workbench lower surface, be positioned at institute State the second driving means on the second workbench, connect described second driving means and there is rectification location The pressing plate of function, it is positioned at the upper mold and driving coordinated below described second workbench and with described lower mold 3rd driving means of described upper mold, described storage device includes for depositing material to be processed and bottom Movable material-storing box, it is positioned at described material-storing box and is easy to separate the second locating dowel of material to be processed, Described second locating dowel is vertical elongate cylinder structure and includes being positioned at the pin tapering on top, is positioned at institute State the first depressed part below pin tapering, be positioned at the lobe below described first depressed part, be positioned at institute State the second depressed part below lobe and be positioned at below described second depressed part and diameter is less than described The elongate portion of lobe.
Concrete, described storage device includes the support column supporting described material-storing box and is positioned at described storage Four-drive device below magazine.
Concrete, described pay-off includes providing the 5th driving means, fixture of power, being positioned at Lowering or hoisting gear on described fixture, connect the moving track of described lowering or hoisting gear, at described moving rail First moving member of movement and being positioned on described first moving member and for extracting material to be processed in road Air draught post.
Concrete, described blanking device includes the 6th driving providing power being positioned on described support seat Device, the driving member connecting described 6th driving means coordinate the second of transmission to move with described driving member Moving part, it is positioned on described second moving member and for clamping the chuck of machined complete material.
Concrete, described material-gathering device includes the shifting flitch for facilitating machined complete material to slide, props up Support the first boss of described shifting flitch, be positioned on described support seat and for collecting machined complete material Material collecting box and be positioned at the garbage collection box for collecting waste material below described first workbench.
Concrete, described support seat is provided with and controls the control that described automatic punching machine is turned on and off and open Close.
To achieve these goals, the present invention also carries the processing method for stamping of a kind of automatic punching machine, bag Include following steps:
1) reclaiming process: carry out certainly under the mating reaction with described pay-off of the described storage device Dynamic feeding;
2) feeding process: described pay-off by the height that sets and horizontal range by be processed Material is transported at described decompressor;
3) location rectification, flattening course: described first locating dowel rises on alignment material to be processed Hole, location positions, and described pressing plate declines pressing material to be processed and carries out location rectification, described The wind inlet of lower mold periphery opens absorption material to be processed makes it smooth firm;
4) blanking process: described blanking device clamps material to be processed, described upper mold declines rushes Cutting out, after processing, described upper mold rises with described pressing plate, and described first locating dowel declines;
5) blanking process: described blanking device by machined complete transport of materials to described material-gathering device, Complete whole Punching Process.
Compared with prior art, the having the beneficial effects that of a kind of automatic punching machine of the present invention:
1, devise there is the storage device rising or falling function, it is simple to feeding;
2, the second locating dowel arranged in material-storing box effectively prevent in reclaiming process due to quiet The generation of the soft board material superposition phenomenon that conductance causes so that the soft board on top layer can be effective Quickly separate with lower floor soft board, thus reach automatic feed dividing function;
3, the first moving member moved horizontally by apparatus for automatically lifting and can controlling can essence The accurate Working position being transported to material to be processed draft, it is achieved automatic material taking, automatically The function of feeding;
4, material to be processed is made by arranging the first locating dowel, pressing plate and the lower mold with wind inlet Material has obtained positioning the most accurately, flattening and firm, for follow-up before carrying out stamping-out Stamping procedure provides accurate positional precision and ensures;
5, by arranging the 6th driving means, driving member, the second moving member and chuck, by the 6th The rotary motion of driving means changes into by the cooperation of driving member and the second moving member The linear motion of two moving members, thus realize the automatic blanking process of machined product;
6, whole process is automated production, i.e. saves labour force, improves again production efficiency, And improve the quality of product.
[accompanying drawing explanation]
Fig. 1 is the axis side view structure such as grade of automatic punching machine of the present invention;
Fig. 2 is the front view structure that flattening course is corrected in automatic punching machine of the present invention location;
Fig. 3 is the front view structure of automatic punching machine blanking process of the present invention;
Fig. 4 is the axis side view structure such as grade of automatic punching machine blanking process of the present invention;
Fig. 5 is the structural representation of storage device of the present invention;
Fig. 6 is the structural representation during pusher of automatic punching machine of the present invention;
Fig. 7 is the second locating dowel structural representation of automatic punching machine of the present invention;
Fig. 8 is the plan structure schematic diagram of the first moving member of automatic punching machine of the present invention;
Fig. 9 is the decompressor structural representation of automatic punching machine of the present invention;
Figure 10 is the first locating dowel structural representation of automatic punching machine of the present invention;
Figure 11 is the pressure plate structure schematic diagram of automatic punching machine of the present invention.
In figure, numeral represents:
100 automatic punching machines;
1 supports seat;
2 storage devices, 21 material-storing boxs, 211 around portion, 212 base plates, 22 support columns, and 23 second Locating dowel, 231 pin taperings, 232 first depressed parts, 233 lobe, 234 second depressed parts, 235 Elongate portion, 24 four-drive devices;
3 pay-offs, 31 the 5th driving means, 32 fixtures, 33 lowering or hoisting gears, 34 moving tracks, 35 first moving members, 36 air draught posts;
4 decompressors, 401 first workbench, 402 second workbench, 403 lower molds, 4031 cutting dies Hole, 4032 wind inlets, 404 first locating dowels, 405 second boss, 406 first driving means, 4061 First motion bar, 407 second driving means, 4,071 second motion bars, 408 pressing plates, 4081 pressings Portion, 4082 correct post, 40821 holes, location, 409 upper molds, 410 the 3rd driving means;
5 blanking devices, 51 the 6th driving means, 52 driving members, 53 second moving members, 54 chucks;
6 material-gathering devices, 61 move flitch, 62 first boss, 63 material collecting box, 64 garbage collection boxes;
7 control switch.
[detailed description of the invention]
Refer to Fig. 1, the present invention is a kind of automatic punching machine 100, and it includes supporting seat 1, being positioned at and prop up Control, according to what a definite sequence was arranged, the control switch that automatic punching machine 100 is turned on and off on support seat 1 7, storage device 2, pay-off 3, decompressor 4, blanking device 5 and material-gathering device 6.
Refer to Fig. 1, Fig. 5, Fig. 6 and Fig. 7, storage device 2 includes for depositing material to be processed Material-storing box 21, support the support column 22 of material-storing box 21, be positioned at material-storing box 21 and be easy to separation and treat Second locating dowel 23 of rapidoprint and be positioned at below material-storing box 21 and be fixed on support seat 1 Four-drive device 24.Material-storing box 21 include preventing material to be processed glide collapse around portion 211 with And relative to the base plate 212 around portion 211 activity, base plate 212 is set to bascule and at 4 wheel driven The lower action that can complete to rise or fall of driving of dynamic device 24 so that processed product can exceed storage Magazine 21 is so that pay-off 3 carries out feeding more smoothly.Second locating dowel 23 is vertical elongated Cylinder, it includes being positioned at the pin tapering 231 on top, being positioned at the first depressed part below pin tapering 231 232, it is positioned at the lobe 233 below the first depressed part 232, is positioned at second below lobe 233 Depressed part 234 and be positioned at below the second depressed part 234 and diameter is less than the elongate portion of lobe 233 235.When soft board to be processed be fed device 3 take out time, due to easy with electrostatic between soft board Stick together, thus can take out the soft board to be processed of polylith superposition, in order to solve this problem, by One section of lobe 233 is set in two locating dowels 23, when the soft board to be processed of polylith superposition is through lobe When 233, owing to one piece of soft board to be processed of the superiors is by the active force of pay-off 3, other superpositions Soft board to be processed be forced to separate with first piece of soft board to be processed by the resistance of lobe 233, from And reach to separate the effect of material to be processed.The gas that four-drive device 24 in present embodiment uses Cylinder drives, and the bottom being controlled material-storing box 21 by piston and motion bar is risen or fallen, owing to cylinder drives Dynamic belonging to uses the most skilled prior art, and person skilled in art can grasp cylinder at once and drive Dynamic operation principle, therefore, no longer makees in detail the operation principle of air cylinder driven in this detailed description of the invention Thin description.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 8, pay-off 3 includes providing the of power Five driving means 31, fixture 32, the lowering or hoisting gear 33 being positioned on fixture 32, connection lifting dress Put 33 moving track 34, in moving track 34 first moving member 35 of movement and be positioned at first On moving member 35 and for extracting the air draught post 36 of material to be processed.Lowering or hoisting gear 33 is general liter Descending mechanism, including actuator, driving member and movable part, can use hydraulic pressure, motor etc. to drive ball Leading screw lifts, it is possible to use pneumatically driven piston bar to lift;First moving member 35 can use Cylinder, hydraulic pressure, motor etc. drive control, and it moves horizontally.Lowering or hoisting gear 33 and moving track 34 exist Can rise or fall together under the driving of the 5th driving means 31, the first moving member 35 is relative to movement Track 34 can do horizontal displacement campaign, and the first moving member 35 is provided with at least one pair of air draught post 36, inhales Wind post 36 connecting gas transmission pipe road, when soft board to be processed is pushed to air draught post 36 by four-drive device 24 Post mouth time, gas pipeline bleeds, and the pressure in air draught post 36 reduces, and therefore passes through pressure difference Soft board to be processed is adsorbed on the first moving member 35.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 9, Figure 10 and Figure 11, decompressor 4 includes Constitute the first workbench 401 and second workbench 402 of frame structure, be positioned on the first workbench 401 The lower mold 403 on surface, it is positioned at the first locating dowel 404 of lower mold 403 both sides, positions for bearing second Second boss 405 of post 404, it is positioned at below the second boss 405 and is fixed on the first workbench 401 times First driving means 406 on surface, the second driving means 407 being positioned on the second workbench 402, company Connect the second driving means 407 and there is the pressing plate 408 of rectification positioning function, be positioned at the second workbench 402 Lower section and the upper mold 409 that coordinates with lower mold 403 and the 3rd driving means 410 of driving upper mold 409. Lower mold 403 includes the cutting die hole 4031 for housing upper mold 409 and is distributed around cutting die hole 4031 Some wind inlets 4032 for flattening soft board to be processed;First locating dowel 404 top is taper, It is located on the first boss 405, in connection the first driving means 406 that the first boss 405 is concrete First motion bar 4061, the driving in the first driving means 406 can rise or fall;Pressing plate 408 wraps Include press section 4081 and be positioned at the corresponding with the first locating dowel 404 position of pressing not 4081 lower surfaces Rectification post 4082, correct post 4082 be provided with the hole, location for housing the first locating dowel 404 40821, the second motion bar 4071 in connection the second driving means 407 that pressing plate 408 is concrete, Can rise or fall under the driving of two driving means.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 9, when pay-off 3 is by soft board to be processed When being transported to the position drafted, the first locating dowel 404 rises, and its top is inserted on soft board to be processed Hole, location, but it sometimes appear that the location borehole jack of soft board to be processed is in the tapered portion of the first locating dowel 404 And fail fully mated with the first locating dowel 404, and pressed by pressing plate 408, first can be made Locating dowel 404 coordinates with the hole, location on soft board to be processed completely, thus realizes positioning correcting function, And make more accurate positioning, the guarantee of compacting is provided for follow-up stamping position precision.Pass through pressing plate After 408 pressings, generally there is also soft board to be processed and fail to be attached to completely and have and heave in lower mold 403 Phenomenon, affects the degree of accuracy of stamping-out due to the out-of-flatness on soft board surface to be processed, thus causes stamping-out Malposition, in order to solve this problem, cutting die hole 4031 periphery in lower mold 403 is provided with some Wind inlet 4032, by the suction at wind inlet 4032, adsorbs completely and firmly by soft board to be processed On lower mold 403 surface, thus play the function of leveling soft board, moreover it is possible to prevent soft board in blanking process from moving The generation of position phenomenon.In present embodiment, first driving means the 406, second driving means 407 uses Air cylinder driven, its concrete structure is the technology that prior art is highly developed, explains the most in detail State.
Refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, blanking device 5 includes being positioned at carrying on support seat 1 For the 6th driving means 51 of power, the driving member 52 connecting the 6th driving means 51 and driving member 52 coordinate transmissions the second moving member 53, be positioned on the second moving member 53 and machined complete for clamping The chuck 54 of material.Second moving member 53 can under the transmission of the 6th driving means 51 and driving member 52 Move forward and backward along driving member 52 axial direction.In the present embodiment, the driving principle of blanking device 5 Using ball-screw-transmission principle, the 6th driving means 51 uses servomotor, driving member 52 use threaded screw rod, and the second moving member 53 is provided with the ball coordinating transmission with driving member 52 Nut.
Refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, material-gathering device 6 includes for facilitating machined complete material What material slided move flitch 61, shift the first boss 62 of flitch 61, be positioned on support seat 1 and use In collect the material collecting box 63 of machined complete material and be positioned at below the first workbench 401 for collecting The garbage collection box 64 of waste material.
Refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the invention allows for above-mentioned automatic punching machine 100 Processing method for stamping, comprise the following steps:
1) control switch 7 is opened;
2) reclaiming process: electronic controller transmits a signal to four-drive device 24, the 4th drives dress Putting 24 and exceed around portion 211 by base plate 212 picking-up of material-storing box 21, air draught post 36 adsorbs to be added Work soft board, under the auxiliary centrifugation of the second locating dowel 23, the first moving member 35 is from material-storing box Soft board to be processed is extracted in 21;
3) feeding process: after pay-off 3 receives the signal of electronic controller, lowering or hoisting gear 33 Controlling moving track 34 to move up and down, the first moving member 35 carries soft board and moves horizontally, and passes through Soft board to be processed is transported at decompressor 4 by the height and the horizontal range that set;
4) flattening course is corrected in location: air draught post 36 unclamps soft board to be processed, the first driving means After 406 signals receiving electronic controller, the first locating dowel 404 is pushed to a liter alignment material to be processed Hole, location on material positions, and pressing plate 408 is pressed down on to be added by the second driving means 407 Work soft board carries out location and corrects, and it is to be processed soft that the wind inlet 4032 of lower mold 403 periphery opens absorption Plate also makes it smooth;
5) blanking process: chuck 54 clamps soft board to be processed, the upper mold 409 in decompressor 4 Declining and carry out punch press process, stamping-out terminates rear upper mold 409, pressing plate 408 rises, the first locating dowel 404 decline;
6) blanking process: machined soft board is transported under the effect of the 6th driving means 51 by chuck 54 Delivering to move at flitch 61, chuck 54 unclamps, and machined soft board slips into material collecting box 63.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art For, without departing from the concept of the premise of the invention, it is also possible to make some deformation and improvement, These broadly fall into protection scope of the present invention.

Claims (7)

1. an automatic punching machine, it decompressor including support seat, being positioned on described support seat, it is special Levy and be: described automatic punching machine also includes being positioned on described support seat and for depositing the storage of material to be processed Expect device, between described storage device and described decompressor and for carrying the feeding of material to be processed Device, be positioned at decompressor after for the blanking device of blanking and for collecting the collection of machined complete material Material device, described decompressor includes constituting the first workbench and second workbench of frame structure, being positioned at institute State the lower mold of the first worktable upper surface, be positioned at the first locating dowel of described lower mold both sides, be positioned at described first Below locating dowel and be fixed on the first driving means of described first workbench lower surface, be positioned at described second work The second driving means in station, connect described second driving means and having correct positioning function pressing plate, It is positioned at the upper mold coordinated below described second workbench and with described lower mold and drives the 3rd of described upper mold to drive Dynamic device, described storage device includes for depositing the movable material-storing box of material to be processed and bottom, being positioned at institute Stating in material-storing box and be easy to separate the second locating dowel of material to be processed, described second locating dowel is vertical thin Long cylinder structure and include being positioned at the pin tapering on top, being positioned at the first depressed part below described pin tapering, position Lobe below described first depressed part, it is positioned at the second depressed part below described lobe and is positioned at Below described second depressed part and diameter is less than the elongate portion of described lobe.
2. automatic punching machine as claimed in claim 1, it is characterised in that: described storage device includes supporting The support column of described material-storing box and be positioned at the four-drive device below described material-storing box.
3. automatic punching machine as claimed in claim 1, it is characterised in that: described pay-off includes providing 5th driving means of power, fixture, the lowering or hoisting gear being positioned on described fixture, connect described lifting The moving track of device, in described moving track the first moving member of movement and be positioned at described first and move On part and for extracting the air draught post of material to be processed.
4. automatic punching machine as claimed in claim 1, it is characterised in that: described blanking device includes being positioned at On described support seat provide power the 6th driving means, connect described 6th driving means driving member, Coordinate the second moving member of transmission with described driving member, be positioned on described second moving member and add for clamping The chuck of the complete material of work.
5. automatic punching machine as claimed in claim 1, it is characterised in that: described material-gathering device include for Facilitate that machined complete material slides moves flitch, supports the first boss of described shifting flitch, is positioned at described support On seat and for collect the material collecting box of machined complete material and be positioned at below described first workbench for receiving The garbage collection box of collection waste material.
6. automatic punching machine as claimed in claim 1, it is characterised in that: described support seat is provided with control The control switch that described automatic punching machine is turned on and off.
7. the processing method for stamping of an automatic punching machine as claimed in claim 1, it is characterised in that: bag Include following steps:
1) reclaiming process: automatically take under the mating reaction of described pay-off at described storage device Material;
2) feeding process: described pay-off by the height that sets and horizontal range by material to be processed It is transported at described decompressor;
3) location rectification, flattening course: described first locating dowel rises the location being directed on material to be processed Hole positions, and described pressing plate declines pressing material to be processed and carries out location rectification, described lower mold periphery Wind inlet open and adsorb material to be processed and make it smooth firm;
4) blanking process: described blanking device clamps material to be processed, described upper mold declines and carries out stamping-out, After processing, described upper mold rises with described pressing plate, and described first locating dowel declines;
5) blanking process: described blanking device is by machined complete transport of materials to described material-gathering device, complete Become whole Punching Process.
CN201410625117.9A 2014-11-07 2014-11-07 A kind of automatic punching machine and processing method for stamping thereof Active CN104325001B (en)

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CN107297438B (en) * 2015-07-15 2018-12-28 平湖瑞星金属工艺有限公司 A kind of automatic material taking stamping equipment
CN106944523A (en) * 2015-09-29 2017-07-14 葛云龙 A kind of method of work of punch press
CN106424289B (en) * 2016-11-26 2019-06-25 东莞市杰精精密工业有限公司 A kind of automatic stamping equipment of connector shell
CN107537933A (en) * 2017-09-28 2018-01-05 如皋市煜腾金属材料科技有限公司 A kind of hot stamping device being applied in alloy production
CN110523874B (en) * 2019-08-29 2020-09-11 金肯职业技术学院 Automatic feeding device for stamping and shearing of metal plates and operation method
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