CN2075114U

CN2075114U - Motor piece punching die with positioning pin

Info

Publication number: CN2075114U
Application number: CN 90221198
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: 1991-04-17

Abstract

The utility model relates to a motor piece punching die with positioning pins, which is an improved motor piece punching die. A positioning problem in the piece punching and the nest blanking of a motor is solved through a positioning pin arranged on a punching die, which ensures the percentage of steel product yield of the nest blanking of motor silicon steel sheets to be increased by 4-10%, accordingly, labor intensity is reduced, and production efficiency is enhanced.

Description

Motor piece punching die with positioning pin

A kind of improved mould that is used for the punching of electric machine rotor silicon steel sheet is specially adapted to cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing the mould of punching, belongs to the stamping-out technical field.

The electric machine rotor silicon steel sheet is when the punching blanking, and common all is that whole silicon steel sheet with 1 * 2 meter specification is cut into billot, sends into the punch press punching.This slitting punching method volume recovery is very low, only be 46-48%, and 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 proposed to 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 motor stamping is all embedded in the circular arc gap of adjacent motor stamping go, thereby make volume recovery improve 4-10%.But, cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing punching and be difficult to the location in force.For this reason, the someone utilizes the straight flange sideline of whole silicon steel sheet to position again.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 gap is then wasted silicon steel sheet; 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, and 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 be guaranteed.

This novel purpose is that development is a kind of new, can make silicon steel sheet by cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing the accurately mould of location of requirement when punching.This mould is compared with original existing mold, can not change excessively, can not make operating personnel feel that in force numerous Xu is difficult to manage again.Thereby punching can be carried out according to the requirement of cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing discharge fully, guarantee to improve the volume recovery of 4-10%.

This novel purpose is achieved in that at the center of punching and shearing die an alignment pin is set, and simultaneously, gives on silicon steel sheet and gets locating hole according to cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing marker map earlier, during punching, locating hole is inserted in the alignment pin go, and can accurately locate.Below in conjunction with accompanying drawing to this novel being further described.

Fig. 1 is 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 marker map;

Fig. 2 has the die drawing of alignment pin down;

Fig. 3 is the die drawing that has alignment pin;

Fig. 4 is the B-B cutaway view of " three-pawl type " alignment pin;

Fig. 5 is that A is to view;

This novel original motor punch die is improved forms.Punch die is made up of patrix (4) and counterdie (5), and an alignment pin (6) is set at the center of punch die, alignment pin (6) be shaped as the cylinder that has the circular cone tip, cylindrical diameter highly is about the 12-20 millimeter greater than 8 millimeters.The diameter of dowel pin and socket is big more, is easy to the location more.

Treating that giving elder generation on the silicon steel sheet of punching gets locating hole (1) by cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing marker map, the home position of each punching (2) overlaps on the center of circle of locating hole (1) and the marker map, can go out what motor stampings on the silicon steel sheet, just give getting what locating holes earlier.The diameter of locating hole (1) should be slightly greater than the diameter of alignment pin (6).

During operation, silicon steel sheet is pushed between the punch press punch die, in the time of near locating hole is positioned at alignment pin, can be easy to it is enclosed within on the alignment pin.Like this, owing to locating hole is got by marker map, so must be the accurate position of punching stamping die this moment.

Alignment pin (6) operated by rotary motion when punch die is the mould of two circles or three circle blankings, also can be arranged on the patrix (4) on counterdie (5).

The fixing of alignment pin (6) can adopt screw thread to fix, and also can punch on punch die and inlay, but should guarantee its perpendicularity.

In the punching of silicon steel sheet, when adopting " Er Lianchong " or " San Lianchong " technology, in order to give for the second time or the location of punching for the third time, the hole, garden that sweeps away in the time of must utilizing punching for the first time or punching for the second time is as the locating hole of follow-up punching, and at this moment the diameter of its location " pin " is inevitable very big.For this reason, can adopt " three-pawl type " structure.Three locating detents (7) are uniform, and the external profile surface of each pawl is a curved surface, and its root is the part of straight Cylinder outer surface, and radius of curvature is identical with the radius of locating hole, and its top is the part of garden frustum outer surface.Each rest shoe all is vertically fixed on the mould.

This novel punch die punching electric machine rotor punching that provides is provided, can be made the silicon steel sheet location easily, excesssive gap or too small problem between sheet can never occur, 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% thereby make, percent defective significantly descends.In addition,, also improved production efficiency, reduced labour intensity, laid the foundation, had bigger economic benefit for further adopting the automation punching owing to be easy to the location in operation.

Claims

1, a kind of improved motor stamping mould, it is made up of patrix (4) and counterdie (5), it is characterized in that being provided with an alignment pin (6) at the center of punch die, and alignment pin is shaped as the Cylinder that has garden awl tip.

2, motor stamping mould according to claim 1 is characterized in that alignment pin (6), and the diameter of Cylinder is greater than 8 millimeters.

3, motor stamping mould according to claim 1 is characterized in that, alignment pin adopts " three-pawl type " structure, three-jaw is uniform, and wherein, the external profile surface of each pawl (7) is a curved surface, its root is the part of straight garden outer surface of column, and its top is the part of garden frustum outer surface.