Device for fixing automobile transmission gear during forging

Abstract

The invention relates to the technical field of gear machining, in particular to a device for fixing an automobile transmission gear during forging. The device comprises a base, a shaft column and the gear, wherein the shaft column is vertically positioned in the middle of the base, and is sleeved with the gear; a partition plate is arranged on the lower surface of the gear; primary springs are arranged between the partition plate and the base; spacer blocks are arranged on the edges of the base; the upper surfaces of the spacer blocks are in flush with the lower surface of the partition plate; the inner surfaces of the spacer blocks are in flush with the outer surface of the partition plate; a fixing blot is arranged at the upper end of the gear; and the shaft column is sleeved with the fixing bolt. According to the device provided by the invention, the primary springs are arranged at the bottom of the partition plate, and the fastening effect on the gear is ensured by virtue of the strong elastic forces of the primary springs; and meanwhile, the primary springs are arranged to form a space cavity, so as to facilitate post machining.

Description

technical field [0001] The invention relates to the technical field of gear processing, in particular to an automotive gearbox gear forging and fixing device. Background technique [0002] Generally, gears with variable speed are collectively referred to as transmission gears. The commonly used material for transmission gears is forged steel. Transmission gears often work under conditions of high speed, high load, and constant alternation of speed and load. The speed change gears rely on their own structural dimensions. And the strength of the material to bear the external load, which requires the material to have high strength, toughness and wear resistance. Due to the complex shape of the transmission gear, high gear precision requirements, and good material method, the current manufacturing method of automobile transmission gears has the following technical problems: [0003] 1. The existing manufacturing methods of automobile gearbox gears are simple, the quality of the...

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Problems solved by technology

[0003] 1. The existing manufacturing methods of automobile gearbox gears are simple, the quality of the produced products is average, and the general service life is not long;

[0004] 2. At present, most automotive gearbox gear blanks are turned by ordinary lathes, and all turning processes cannot be completed in one clamping, and it is difficult to ensure the coaxiality of the inner hole and the side surface, as well as the verticality of the end surface and the hole axis;

[0005] 3. Most of the existing gears of automobile transmission gears are hobbed by ordinary hobbing machines, the machining accuracy is low, and the surface roughness does not meet the requirements;

[0006] 4. Most of the existing automobile gearbox gears use the solid carburizing method, which is low in cost, but takes too long, and the thickness of the carburized layer is relatively thin;

[0007] 5. Most of the existing automobile transmission gears only use the heat treatment method of quenching, the effect is average, and the gear life is not long

[0008] In the whole forging process, gear fixing is the basis of automatic processing. If the fixing is not good, it will often cause the gear to be unstable.

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