A heat treatment process for a clutch disc hub

Abstract

The invention belongs to the technical field of heat treatment of materials, and specifically relates to a heat treatment process of a clutch disc hub. The tempering device used in the process includes a furnace body; a heating unit is arranged on one side of the furnace body; a furnace door is hinged in front of the furnace body , there is a pipeline on the top of the furnace body, which communicates with the high-pressure air and the iron shot warehouse; a round rod is arranged in the furnace body, and the round rod is rotatably connected with the furnace body. Fixed disc hub; one end of the round rod located outside the furnace body is fixedly connected to the No. 1 gear; the top of the furnace body is fixedly connected to the motor at the corresponding position of the No. 1 gear; the No. 2 gear fixedly connected to the output shaft of the motor meshes with the No. 1 gear; One end that runs through the furnace body and extends to the inside of the furnace body is connected with a nozzle pipe. The airflow velocity in the nozzle pipe increases gradually as the temperature of the disk hub decreases, thereby increasing the force depth of the iron shot when it hits the disk hub. Increased hub disc stress relief effect.

Description

technical field [0001] The invention belongs to the technical field of material heat treatment technology, and specifically relates to a heat treatment technology for a clutch disc hub. Background technique [0002] Due to the torsional impact of the slave part of the clutch, the hub often suffers from torsional fatigue fracture. For example, in the Yuchai 350 series products, since the engine uses a 4-cylinder engine, during the first 2.5 times durability impact trial production process of the product, the fatigue life of the clutch disc hub is about 50,000 times (however, the actual requirement is 100,000 times), In particular, individual samples have been deformed and failed during the test. In the prior art, the material of the clutch disc hub is No. 10 steel with a carbon content of 0.1%, and through the heat treatment process of carbonitriding quenching + tempering, its fatigue life is only about 50,000 times, which is far from meeting the requirements of the clutch d...

AI Technical Summary

Problems solved by technology

[0004] In order to make up for the deficiencies of the existing technology, the workpiece after heat treatment in the prior art needs tempering and shot peening to eliminate the internal stress of the workpiece. There are many processes and the production efficiency is low. At the same time, the internal stress of the wheel hub is not completely eliminated during normal temperature shot peening. , affecting the fatigue strength and service life of the workpiece, a heat treatment process for a clutch disc proposed by the present invention

Images