A method of manufacturing a silent chain chain plate

Abstract

The invention relates to a method for manufacturing an efficient silent chain plate long in service life. The method includes the following steps of firstly, placing a steel plate to be machined in the middle of a die of a horizontal punching machine, wherein a silent chain multi-particle blanking smooth punching composite die is adopted as the die; secondly, making a front die holder and a rear die holder get close so that a female formwork and an outer stripper can be closed, making a protruding block enter a concave hole, punching the steel plate to form small steel pieces with die shapes, and using the small steel pieces in cooperation with parts with small gaps for conducting smooth punching; thirdly, conducting inner hole punching on the inner portions of the small steel pieces through punching nails to obtain a chain plate, and discharging waste out of the gap between the outer stripper and a rear clamping plate through discharge through holes, wherein the chain plate inner hole punching can be smooth due to the fact that the fit clearance between the punching nails and the through holes are small; fourthly, separating the female formwork from the outer stripper, embedding the chain plate in the concave hole, pushing the chain plate out of the concave hole through a piece ejecting block at the moment, and meanwhile conducting high-pressure flushing to blow down the chain plate when the front die holder and the rear die holder are separated. By means of the method, high-speed and large-batch production is achieved, and the raw material waste caused by progressive dies is avoided.

Description

technical field [0001] The invention relates to mass production and manufacturing technology of silent chain chain plates, in particular to a manufacturing method of high-efficiency and long-life silent chain chain plates. Background technique [0002] Different from the contact between the chain roller and the sprocket to transmit torque during the roller chain transmission process, the meshing method of the silent chain is that the tooth surface of the chain plate contacts the sprocket. In order to reduce the energy lost by friction of the silent chain, it is usually necessary to contact the chain plate Some are bright blanked. Different from the hinge pair formed between the pin shaft and the sleeve of the roller chain, the hinge pair of the silent chain is formed between the pin shaft and the chain plate. In order to improve the wear life of the chain, it is necessary to use bright punching on the inner hole of the chain plate . [0003] In order to obtain the bright s...

AI Technical Summary

Problems solved by technology

The structure efficiency of a single composite die with a very small gap is low, and the extremely small blanking gap reduces the service life of the die. In the process of mass production, a large number of machine tools and operators are usually required.

However, the waste of structural materials in the extrusion of multiple progressive dies is serious, and the utilization rate of raw materials will usually be reduced by about 15%, which greatly increases the production cost of the silent chain

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