Spinning process for manufacturing step type spinning belt wheels with different diameters and special tool thereof

Abstract

The invention discloses a spinning process for manufacturing step type spinning belt wheels with different diameters and a special tool thereof. The spinning process comprises twice spinning, and adopts two steps to mold by spinning. In primary spinning, the inner diameter of a second-grade large end surface is used for positioning on a mold; after molding by spinning, and when materials are totally filled in upper and lower core molds, the roundness of a first-grade tooth groove is guaranteed by the upper and lower core molds; then, a spun first tooth groove is used as reference; a center hole is formed in the bottom plane, so that the first-grade tooth groove is better in jumping relative to the reference hole; then, the center hole is used for positioning; a second-grade tooth groove isspun, and is better in jumping relative to the center hole; and the coaxiality of tooth grooves of upper and lower steps can be guaranteed. The spinning process has the following beneficial effects:the problems of staggered installation of upper and lower tooth grooves of the step type spinning belt wheels with different diameters and instable mounting size are solved; stable spinning productionis realized; the product quality is effectively guaranteed; and qualified step type plate spinning belt wheels with different diameters are provided.

Description

technical field

[0001] The invention belongs to the technical field of step belt pulley processing with different diameters by spinning the inner plate of an automobile engine, and relates to a step belt pulley spinning process and a special tooling thereof. Background technique

[0002] At present, in the pursuit of lightweight in automobiles, motors, and agricultural machinery, in order to achieve better energy saving and emission reduction purposes, more and more spinning pulleys are used, but most of them currently use a single set of pulleys, such as this multi-stage Composite pulleys are rare. If multiple sets of pulleys must be used, most pulleys are assembled into a whole by screws or welding. Compared with this combined structure of multiple pulleys, the multi-step stepped pulley is a whole and does not need to be connected into a whole by other means, so that the material consumption is less, the cost is low, the efficiency is high, and the performance is good. Ho...

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