Relay flat iron core machining method and apparatus

Abstract

The invention relates to a relay flat iron core processing method and a device thereof. The method comprises the steps: the relay flat iron core is cold-forged by three moulds and three strokes, a flat wire is cut into a proper length in a cutting fixing mould, and then the iron core is moulded in the three main moulds. The device comprises a fixing and cutting mould which is used for cutting the flat wire, the three main moulds, three punching moulds and a removing clamp with a U-shaped groove, wherein the three main moulds and the three punching moulds are used for cold-forging and moulding the flat wire. The relay flat iron core processing method and the device enable the flat wire to be moulded in a sealing mold cavity and eliminate the defect that the head of a square part is easy to generate fuzzy grains when being upset, and meanwhile, the automation continuous production can be realized.

Description

technical field [0001] The invention relates to cold forging, and more specifically relates to a method and device for processing flat iron cores of relays. Background technique [0002] The existing cold forging parts processing methods basically use round bar-shaped wires to be extruded or upset by cold forging machines, such as processing cylindrical rods, screws, nuts and other parts, which will affect the shape of cold forging parts. There are some restrictions. For example, a three-die three-blow cold forging machine that uses a clip conveying device to realize automatic feeding. When processing non-cylindrical parts, such as flat iron cores for relays, the semi-finished product is in the process of being conveyed. Rotation will occur, so that the semi-finished product formed by the first main mold cannot be transported into the second main mold stably, so that automatic production cannot be realized. In addition, the molds of the first main mold, the second main mol...

AI Technical Summary

Problems solved by technology

[0002] The existing cold forging parts processing methods basically use round bar-shaped wires to be extruded or upset by cold forging machines, such as processing cylindrical rods, screws, nuts and other parts, which will affect the shape of cold forging parts. have some restrictions

For example, a three-die three-blow cold forging machine that uses a clip conveying device to realize automatic feeding. When processing non-cylindrical parts, such as flat iron cores for relays, the semi-finished product is in the process of being conveyed. There will be rotation, so that the semi-finished product formed by the first main mold cannot be transported stably into the second main mold, so that automatic production cannot be realized

In addition, the molds of the first main mold, the second main mold and the third main mold must be assembled on the cold forging machine. When assembling, it is necessary to ensure that after the assembly of the three molds, their centerlines are on the same horizontal plane. It is difficult to find the benchmark for the die assembly and fixing method of the cold forging machine

In addition, for the upsetting of non-circular heads, such as: square, hexagonal and semicircular, etc., it is easy to produce burrs and burrs on the edges, which is a fatal defect for the relay core. Because after the relay iron core is assembled and riveted, if there is iron chipping, burr sticking or falling off, it will affect the sensitivity of the relay or even short circuit

If it is used in important equipment such as cars, the consequences will be very serious

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