CN1060046A

CN1060046A - A kind of punching-shearing method of interlocked cutting for motor silicon steel plate and mould thereof

Info

Publication number: CN1060046A
Application number: CN 90108054
Authority: CN
Inventors: 姜以滁; 姜丰民
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-09-26
Filing date: 1990-09-26
Publication date: 1992-04-08

Abstract

A kind of improved punching-shearing method of interlocked cutting for motor silicon steel plate and mould thereof.It utilizes and gets locating hole in advance on whole silicon steel sheet sheet stock, and the way that alignment pin is set on mould, the sheet stock of being cut out can accurately be located, thereby guarantee that cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing volume recovery can be stabilized in 4-10%, greatly reduce percent defective, prolong die life,, have very big economic benefit in the motor manufacturing.

Description

A kind of punching-shearing method of interlocked cutting for motor silicon steel plate and mould thereof

A kind of improved dynamo steel sheet punching-shearing method of interlocked cutting, it has mainly solved the location and the corresponding mould problem thereof of the silicon steel sheet of punching, belongs to metal punching technical field.

The electric machine rotor silicon steel sheet is when the punching blanking, common all is that whole silicon steel sheet with 1 * 2 meter specification is cut into billot, and send into the punch press punching, therebetween required location, draw materials, feeding all is manual operations, this slitting punching volume recovery is low, on average only is 46-48%; Productivity ratio is low, per minute punching 6-8 time, and the percent defective height, labour intensity is big, and operation danger has the danger of cutting away finger in the time of also.

In order to solve the low problem of volume recovery, people have released and have cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing punching, with the method for dislocation discharge, the circular arc of each dynamo sheet is all embedded in the circular arc gap of adjacent dynamo sheet go, thereby make volume recovery improve 4-10%, still, cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing technology in force, be difficult to the location.For this reason, the someone utilizes the sideline positioning mode of whole silicon steel sheet to position.But this positioning mode can only not used when the sideline of silicon steel sheet straight flange is destroyed.If when first row's disk punching, destroyed the sideline, then second row or punching subsequently are with " wireless complying with ".And location, this sideline, still too busy to get away operator's range estimation or experience.Adjacent two excesssive gaps are then wasted silicon steel sheet, and gap too small (requiring the gap the best on circular arc limit and limit to be the 3-4 millimeter), crimping when punching forms waste product easily.The index that makes the original usefulness method of cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing improve the 4-10% volume recovery can't guarantee.

At present, the comparatively advanced in the world way of cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing is to carry out many levels of platoon leader to advance to dash or on automatic punching machine the coiled strip punching is become corrugated ribbon material (promptly being washed into curved profile band material in advance), adopts progressively to be shaped towards the technology punching again.But these two kinds of technologies all require higher process machinery level, and general unit is difficult to adopt.And if adopt the punching of corrugated ribbon material, the leftover bits and pieces between circular arc will be divided into two, and this has just destroyed the utilization of leftover bits and pieces.And at present, this waste wood utilization accounts for 6% of whole sheet stock.Thereby this technology still is difficult to adopt.

The objective of the invention is to develop a kind of new method of cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing the location of dynamo sheet, this method requires to guarantee higher volume recovery; Also answer simple possible, utilize conventional equipment or improve a little and can implement; In addition, this method should not destroyed the integrality of leftover bits and pieces.

The objective of the invention is by on silicon steel sheet, getting rotor punching center of circle locating hole in advance, and corresponding punching and shearing die made corresponding improvement realizes.The invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is the cloth figure that does not adopt when cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing, and as can be seen from Figure, only can cut out three effective vertical bars, and punching goes out 21 of the D260 finished product sheets of Y160 seat No..

Fig. 2 is the cloth figure that adopts when cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing technology, and as can be seen from Figure, but its punching goes out 28 of the D260 finished product sheets of Y160 seat No..

Fig. 3 has the die drawing of alignment pin down;

Fig. 4 is the die drawing that has alignment pin;

Fig. 5 is " three-pawl type " locating pin structure schematic diagram;

Fig. 6 is that A is to schematic diagram;

The present invention be directed to the improvement that the interlocked cutting for motor silicon steel plate technology that adopts the dislocation discharge is made. Former technology need at first be designed cloth figure when implementing, then by sending sheet, punching, sweeping sheet etc. and operate in and go out finished product on the punch press. Core of the present invention is before punching, gets locating hole (1) by cloth figure (can make earlier model), and the position, the center of circle of each punching (2) on the center of circle of locating hole and the cloth figure overlaps. Can go out what finished product punchings on the silicon steel sheet, namely get in advance what locating holes. Simultaneously the silicon steel sheet punching and shearing die is made corresponding improvement, in the mold center of patrix or counterdie, an alignment pin is set. Like this, when alignment pin embeds in the locating hole, namely be the accurate position of mould of falling.

The diameter of locating hole is greater than 8 millimeters, the external diameter of alignment pin should be slightly smaller than it, alignment pin is the garden cylinder with garden cone tip, it highly is the 12-20 millimeter, like this, when the operator pushes away the sheet material punch press, locating hole and is positioned near the alignment pin, can be easy to alignment pin is fallen in the locating hole, get on thereby make whole sheet material automatically adjust to the mould position that correctly falls. Owing to be circular punching, only need one to enter locating hole, no matter how whole sheet material is tiltedly put all to not impact of punching. The diameter of dowel pin and socket is more big, more is suitable for the location.

Index aperture on the motor stamping, the past comes out with a punching out of rotor punching when the punching with mould.Because index aperture is less,, very easily damage expensive mould at the index aperture place so the mould local stress is very big.Employing because of accurate positioning, can be given simultaneously and get index aperture (3), punching then earlier after giving the method for making locating hole.The shape of index aperture (3) can be garden shape, ellipse garden shape, rectangle, rhombus or other shape.Can adopt drilling machine to get out, also can go out with punch press.Give the marking hole and can make and removed the index aperture part on the mould from, thereby prolong the service life of punch die greatly.

When the alignment pin diameter is excessive, such as in " San Lianchong " technology, the hole, garden that stays in the time of need utilizing a preceding punching is as the locating hole of follow-up punching, and like this, the diameter of dowel hole and pin is inevitable very big.At this moment, alignment pin can adopt " three-pawl type " structure, three-jaw is uniform, wherein the external profile surface of each pawl is curved surface, the curved surface root is the part of right circular cylinder outer surface, radius of curvature is identical with the radius of locating hole, and curved surface top is the part of frustum of a cone outer surface, and each rest shoe all is vertically fixed on the mould.Like this, the external profile surface of three rest shoes has still constituted an alignment pin face.

Among Fig. 2, (2) are motor stamping, and (1) is locating hole, and (3) are index aperture; Among Fig. 3, Fig. 4, (4) are patrix, and (5) are counterdie, and (6) are alignment pin; Figure 5 shows that " three-pawl type " structure, (7) among the figure are " rest shoe " of this structure.

Before the punching, whole sheet stock got locating hole and index aperture by the cloth model, send into then between punching machine mold; In the time of near sheet stock is pushed into alignment pin, it can be easy to slip in the locating hole automatically and go, and then can start the punching switch and carry out punching.Because locating hole is accurately got according to model, so the finished product of going out can both be guaranteed its quality, excesssive gap or too small problem between sheet can never occur.Thereby make and cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing volume recovery and can guarantee to improve 4-10%, percent defective significantly descends, and has also improved production efficiency.In addition,, accomplish fluently, the index aperture on the mould is partly cancelled, prolonged the service life of mould greatly so index aperture can be given earlier owing to adopt locating hole can accurately realize the sheet stock location.The present invention can be widely applied in the interlocked cutting for motor silicon steel plate technology and go, and also can use in other punching technology that needs disk to cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing and go.

Claims

1, a kind of punching-shearing method of interlocked cutting for motor silicon steel plate and mould thereof of improved employing dislocation discharge, by sending sheet, punching, sweeping operations such as sheet and form, it is characterized in that, before punching, on whole sheet stock, give and accomplish fluently locating hole (1) earlier, the center of circle of locating hole (1) overlaps with each punching center of circle that silicon steel sheet is cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing on the cloth figure, during punching, makes in the locating hole (1) on alignment pin (6) the embedding sheet stock that is arranged on the mould and goes.

According to described silicon steel sheet punching-shearing method of interlocked cutting of claim 1 and equipment thereof, it is characterized in that 2, the diameter of locating hole (1) is greater than 8 millimeters.

According to claim 1 or 2 described silicon steel sheet punching-shearing method of interlocked cutting and moulds thereof, it is characterized in that 3,, on whole sheet stock, give and accomplish fluently index aperture (3) earlier that the shape of index aperture (3) can be circle, ellipse, rectangle or other shape.

4, a kind of punching-shearing method of interlocked cutting for motor silicon steel plate and mould thereof; this mould is made up of upper die and lower die, it is characterized in that, an alignment pin (6) is set at the center of patrix or counterdie; alignment pin (6) is the Cylinder of band garden awl tip, and its diameter is slightly smaller than the diameter of locating hole (1).

5, silicon steel sheet punching-shearing method of interlocked cutting according to claim 4 and mould thereof, it is characterized in that, alignment pin adopts " three-pawl type structure ", wherein, the external profile surface of each pawl (7) is a curved surface, its curved surface root is the part of straight garden outer surface of column, and its curved surface top is the part of garden frustum outer surface.