CN1256979A

CN1256979A - Design method for multi former block single-process continuous cutting die

Info

Publication number: CN1256979A
Application number: CN 99126355
Authority: CN
Inventors: 吴伯杰
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 1999-12-17
Filing date: 1999-12-17
Publication date: 2000-06-21
Anticipated expiration: 2019-12-17
Also published as: CN1087667C

Abstract

The present invention belongs to the field of punchingdie design technology, and is characterized by that (n+1) pieces/rows of male dies and correspondent (n+1) pieces/rows of female dies are isometrically arranged along the feeding direction when the die arrangement is worked, and the spacing distance between every two male dies is n times of single stepping distance h of product stock layout pattern, i. e. nh. The described male dies also can be arranged by adopting stepeed mode along the feeding direction. Said invented high-effective die arrangement can be matched with multistep feeding mode, and can greatly raise its blanking production efficiency.

Description

The method for designing of multi former block single-process continuous cutting die

The invention belongs to the mould design field of punch process, the particularly design of single operation continuous stamping (comprising punching, blanking, the die-cut) processing mold in the production in enormous quantities of thin material, smallclothes in the stamping-out processing.

Prior art level: up to now, has the blanking part of single shape when (comprise and have type hole, the blankings and die-cut that unlimited many rows are gathered) in punch process, production in enormous quantities both at home and abroad, because the shape or the pass size of such part are little, planform is elongated, be the saving material during stock layout, reduce scrap (bridge) a, a1 value, generally all adopt in line or tiltedly arrange mode, adopt single step pitch h to send to during feeding.Because of the side thickness of die of punch structure and die, the effects limit of intensity, by stock layout figure a plurality of (row) drift, die can't be installed continuously during design on the mould structure, can only adopt single (row) drift, die.Continuous stamping adds man-hour, whenever sends a step pitch during feeding to, the press stroke once, punching out goes out a shape; Step pitch of feeding again, press again stroke once, punching out goes out a shape again., it is unlimited so to be circulated to, and realizes producing in enormous quantities as shown in Figure 1, 2.

Fig. 1 is the conventional mass-produced single operation blanking die that is used for.It mainly comprises: be installed in punch 1 (drift), stripper parts 2 on the cope match-plate pattern, be installed in the die 3 on the lower bolster.Automatic feed mechanism commonly used and forcing press are supporting during a large amount of production.Patrix is installed in by die shank on the slide block of press motion, and counterdie is fixed on the workbench of forcing press, and upper and lower mould is by guide pin bushing 5, guide pillar 4 guiding during mold work.Forcing press when work, slide block up and down stroke once, feed mechanism work once, mold work once, punching out goes out a part or shape.

Stamping-out in enormous quantities adds man-hour, and fee of material accounts for 70 percent of production cost.For saving material as much as possible, improve the utilization rate of material, all need to carry out stock layout and calculate, the stock layout form adopts in line and oblique row's mode mostly.

Fig. 2 signal provides three kinds of typical stamping-out converted products structure type stock layout figure.Fig. 2 (a) is the punching processing with the densely covered type hole of unlimited many rows, and Fig. 2 (b) is blanking processing, and Fig. 2 (c) is die-cut a mouthful of endless material.Edge-lapped value a, the a1 of stock layout generally obtains very little, gets one or two material thickness value usually, much smaller than the size 1 of stamping-out shape with advance apart from h.

High-speed blanking press is generally all used in the production in enormous quantities of the continuous punching press of blanking part of thin material smallclothes, its number of strokes up to 100～1000 times/more than the min.Expensive tens times of the prices of high-speed blanking press than ordinary press, high-speed blanking press is unit price lattice costliness not, and also will improve the requirement of mould, and speed is high more, and automatic feed mechanism guarantees that the difficulty of pushing precision is also high more.Therefore the raising of stamping-out working (machining) efficiency is very limited.

The objective of the invention is for overcoming the weak point of prior art, a kind of brand-new mould structure method for designing of proposition and feeding thereof are advanced apart from mode in production in enormous quantities, continuous single operation stamping-out manufacture field, can increase substantially the stamping-out working (machining) efficiency exponentially.

The present invention proposes a kind of method for designing of single operation blanking die, it is characterized in that, equidistantly arrange on the feed direction during along mold work (n+1) individual/row's drift and corresponding (n+1) be individual/row's die.Spacing between each drift is n times of the single step pitch h of product stock layout figure, i.e. nh.Other structural design of blanking die of the present invention is with traditional blanking die.

Also can adopt ladder to arrange on the said drift feed direction of the present invention, to reduce the tonnage of stamping-out press.

Operation principle of the present invention is: the process equipment that the present invention uses and traditional mould are identical, and just feeding is advanced apart from the mode difference, even use this mould to carry out stamping-out processing, and the every stroke of press is once controlled feeding simultaneously and advanced apart from being (n+1) h.During press second stroke, n the shape that the first time, stroke was gone out lays respectively on the position of the step pitch h in each drift back.Press is for the third time during stroke, and n shape going out of stroke enters respectively on the position of 2 step pitch h behind each drift for the first time, and n the shape that the second time, the stroke mould was gone out then occupies respectively on the position of a step pitch behind each drift.The rest may be inferred, when n stroke of press stroke, has been covered with the shape of having gone out on each the step pitch position between (n-1) individual and n drift.Behind n stroke of press stroke, every stroke once, the individual step pitch of feeding (n+1) can process n die-cut shape, work efficiency has improved n doubly than the existing continuous stamping processed mould that is used for.

Technical characterstic of the present invention is a feeding style of breaking through single (row) drift, die version and the single step pitch of the single operation blanking die that extensively adopts in traditional production in enormous quantities, feeding style with " ranking method " principle design a plurality of (row) drift, die and a plurality of step pitches in the modern mathematics, under same press number of strokes condition, make productivity ratio become increasing substantially of several times.

According to the blanking die of this invention design, it is big arbitrarily that the multiple that its working (machining) efficiency improves can reach in theory.The concrete actual multiple that reaches is then taken all factors into consideration decision by the practical factors such as feeding speed restriction of tonnage, bed dimension, die structure size (along feed direction) and the automatic feed mechanism of workpiece geomery, press.If use the efficient blanking die of this invention, on ordinary press, its working (machining) efficiency can be comparable with high-speed blanking press, and equipment investment can reduce significantly; If use on high-speed blanking press, during press is only required, the speed of low gear, its productivity ratio and economic benefit can obtain great raising.

After adopting efficient blanking die of the present invention, because along being provided with a plurality of (row) drift, die on the feed direction, blanking pressure is than the mould of single (row) drift thereby increased n times.Usually the high-speed and continuous stamping-out all is to be applied to process thin material (expecting thick in 1.0mm) finding, the blanking pressure of single (row) drift is all smaller, the specified tonnage of general forcing press all has affluence, so efficient blanking die that adopts the present invention to design, not only can significantly improve productivity ratio, also can make full use of the specified tonnage of forcing press.If total blanking pressure exceeds the specified tonnage of forcing press, can adopt ladder to arrange that the method for drift reduces the stamping-out tonnage, and needn't increase the equipment investment of newly purchasing large tonnage pressing machine.

The mould design of the present invention can be used in enormous quantities, single operation continuous stamping (comprising punching, blanking, die-cut) manufacture field; Also comprise the simple compound working procedure of some special mould structure, as die-cut one the impression etc.Especially adopt single operation continuous stamping manufacture field of the production in enormous quantities of coiled strip, band automatic material feeding, be widely used in the stamping-out processing mold design of all conglomeraties such as machinery, electronics, telecommunication, electrical instrumentation, commodity industry.

Brief Description Of Drawings:

Fig. 1 is the structural representation that prior art is used for mass-produced single operation blanking die.

Fig. 2 is the discharge schematic diagram of three kinds of typical stamping-out product processed structure types.Wherein, Fig. 2 (a) is the punching processing with the densely covered type hole of unlimited many rows, and Fig. 2 (b) is blanking processing, and Fig. 2 (c) is die-cut a mouthful of endless material.

Fig. 3 is drift in the die-cut process of mould of the present invention design embodiment one, the position view of die-cut shapes.The circle expression drift of cross-hatching among the figure, open circles are represented the shape gone out.

Fig. 4 is drift in the die-cut process of mould of the present invention design embodiment two, the position view of die-cut shapes.

Fig. 5 is that the drift ladder of mould design embodiment two of the present invention is arranged schematic diagram.

Three kinds of embodiment of efficient single operation blanking die of the present invention's design are respectively described below in conjunction with each figure shown in Fig. 3-5:

Embodiment one, as shown in Figure 3, establishes n=2, and n+1=3 drift, die have been arranged in design on feed direction, and the spacing between drift is nh=2h, and feeding this moment is advanced apart from being (n+1) h=(2+1) h=3h.Behind press stroke to the 3 times, each press work once can be finished the stamping-out processing of n+1=3 shape, and work efficiency is brought up to 3 times with original comparing of one-shot head.

Embodiment two, as shown in Figure 4, if want to improve 4 times of work efficiency, then need when mould designs, on feed direction, equidistantly to design, arrange 4+1=5 (row) drift, die, spacing between the drift is 4h, the every stroke of press once, the advancing of feed mechanism control feeding apart from being 5h.After press work 4 times, whenever depress once, can punching out go out 5 required shapes, work efficiency is brought up to 5 times of traditional one-shot head blanking die.

Embodiment three, and is too big as blanking pressure as shown in Figure 5, can adopt along the feed direction ladder and arrange that the method for drift reduces the stamping-out tonnage, and needn't increase the equipment investment of newly purchasing large tonnage pressing machine.For example when the drift number was 3, middle drift was designed to a ladder separately, and middle drift is designed to a ladder along the drift of feed direction both sides by symmetry principle, and difference in height h is the thick t of (0.5-1.0) individual material between the ladder.Spacing between the drift is 2h.

Claims

1. the method for designing of the operation of drift list more than kind blanking die, it is characterized in that, equidistantly arrange on the feed direction during along mold work (n+1) individual/row's drift and corresponding (n+1) be individual/row's die, the spacing between each drift be the single step pitch h of product stock layout figure n doubly, i.e. nh.

2. the method for designing of many drifts list operation blanking die as claimed in claim 1 is characterized in that, adopts ladder to arrange on the said drift feed direction.