Spinning technology for two-stage-type plate belt pulley and tool special for spinning technology

Abstract

The invention discloses a spinning technology for a two-stage-type plate belt pulley and a tool special for the spinning technology. The spinning technology comprises the steps that (1) a first pre-formed spinning roller corresponds to a base material and conducts extruding in the mode of horizontally moving, and the base material is protruded outwards along an upper parabola-shaped groove and a lower groove of the pre-formed spinning roller; (2) a lower groove in a second pre-formed spinning roller corresponds to the protruded portion on the base material, and the second pre-formed spinning roller conducts spinning on the base material in the mode of horizontally moving; (3) a primarily-formed spinning roller is mounted, a lower groove of the primarily-formed spinning roller corresponds to the protruded portion of the base material, and the primarily-formed spinning roller conducts spinning in the mode of horizontally moving to enable the groove profile to begin to take shape; and (4)a finishing spinning roller is mounted, a lower groove of the finishing spinning roller corresponds to the protruded portion of the base material, the finishing spinning roller conducts fine spinningand finishing in the mode of horizontally moving, and the groove profile shape meeting the final requirement of a product is achieved. According to the spinning technology and the tool, the problem that the groove profile of the equal-diameter two-stage-type plate spinning belt pulley is not shaped is solved, the situation that an interlayer exists in the middle protruded portion is effectively avoided, the problem that defects exist in the inner wall corresponding to the middle protruded portion is avoided, and stable spinning production is achieved.

Description

technical field [0001] The invention relates to a production process of an inner plate pulley of an automobile engine, in particular to a production process of a plate spinning pulley with two grooves of the same diameter and a forming pulley used in the process. Background technique [0002] At present, the plate spinning pulleys of automobile engines mainly use a set of grooves for transmission, and the pulleys that use two sets of grooves for different winding directions are mostly realized by traditional casting and machining processes, but cast pulleys are heavy and have a large moment of inertia 1. The high cost of mass production is an important reason that hinders the realization of lightweight vehicles. The weight of the plate spinning pulley is generally only 1 / 2 of the cast pulley steel. At present, the plate spinning pulley is widely used in automobiles to reduce the weight of the whole vehicle, which is also the general trend of automobile development. Pulley s...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a spinning process of two-stage plate pulleys with the same diameter, which solves the problems of unshaped grooves and delamination in the middle protruding part, and effectively guarantees product quality.

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