Processing method for low-gear support plate of gearbox

Abstract

The invention discloses a processing method for a low-gear support plate of a gearbox. The method comprises the steps as follows: S1, one end surface is subjected to finish turning: a blank plate which is cut and provided with an inner hole is placed on a floating locking support mechanism and then pressed through a pressing mechanism, and finish turning of one end surface is completed; S2, the other end surface is subjected to finish turning: the floating locking support mechanism and the pressing mechanism in the step S1 are adopted for carrying out pressing and positioning, and finish turning can be carried out on the other end surface; and S3, the inner hole is subjected to finish turning: pin holes formed in two sides of the inner hole are firstly processed and then placed on a positioning plate with two conical mandrels, the two conical mandrels correspond to the two pin holes of the low-gear support plate, the lower end of each mandrel is connected with a spring, the two pin holes are positioned through the two mandrels, quick clamping devices are arranged on the positioning plate at two sides of the low-gear support plate, and the low-gear support plate is positioned in thevertical direction through the quick clamping devices. The product produced by the process is stable in quality, the production efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The invention specifically relates to a processing method for a low gear support plate of a gearbox. Background technique [0002] The low gear support plate of the transmission belongs to the thin steel plate product, its shape is irregular, the maximum rotation diameter ￠540mm, the thickness 8mm, the plate body is provided with an inner hole and two pin holes, and the flatness of the end surface is required to be 0.15, but after cutting, opening The surface of the blank plate after the hole is uneven, the flatness is between 0.4-0.8mm, and the size deviation of the blank plate is large, it is not easy to center, and the position of the inner hole is poor when processing the inner hole. The existing processing method is as follows: the first step is to press the inner hole of the end surface fixture, the second step is to fix one end surface of the vehicle through the soft claw, and the third step is to fix the other end surface of the vehicle through...

AI Technical Summary

Problems solved by technology

[0003] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: one is that the flatness after processing is between 0.3-0.54 mm, which is far below the requirement of 0.15 mm flatness of the product, and in During the processing, it is necessary to repeat the positioning surface of the car, because the positioning surface of the tooling cannot be in full contact with the plate, and the plate is partially suspended during the processing process, resulting in obvious fish-scale vibration patterns; The machining center cannot complete 3 pieces in one package; the third is that during the clamping process, 8 screws need to be manually tightened and loosened, which seriously affects the processing efficiency, making the output per shift about 20 pieces

These problems lead to a product rejection rate of about 40% and low processing efficiency

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