Induction shape correcting and die quenching and tempering technological method and equipment for annular parts

Abstract

The invention relates to an induction shape correcting and die quenching and tempering technological method and equipment for annular parts. The method includes the steps that a workpiece is fed; an inductor is used for heating; a core die is corrected; an upper die and a lower die are used for pressure quenching; a core die is driven to conduct induction tempering; the core die is separated; and the workpiece is discharged. The equipment includes an induction heating power source, a quenching machine tool conducting actions of the whole process, a cooling water circulation device and a quenching liquid circulation device. The heating inductor, a quenching liquid injecting box, an upper pressing die, a lower pressing die, the core die and other parts, an executing mechanism for movement of the parts and a workpiece clamping mechanism are located on a framework of the quenching machine tool. The induction heating power source, the cooling water circulation device and the quenching liquid circulation device are connected with the heating inductor, the upper pressing die, the lower pressing die, the core die, the quenching liquid jetting box and a drive mechanism of the quenching liquid jetting box of the machine tool through pipelines, and program actions are completed through a control system of the machine tool. By means of the induction shape correcting and die quenching and tempering technological method and equipment for the annular parts, heat treatment deformation of the annular parts can be effectively corrected and limited, and the qualification rate of the products is increased.

Description

technical field [0001] The invention relates to a process method and equipment for induction orthopedic molding, quenching and tempering of ring parts. Background technique [0002] In the manufacturing process of mechanical parts, heat treatment is usually used to improve the bearing capacity and life of the parts. For thin-walled ring parts, the deformation after heat treatment is relatively large, including loss of roundness, inner space becoming conical, plane warping, etc., and the rejection rate is relatively high. At present, the mechanism of deformation is still in the research stage, and the more effective means of suppressing deformation is to use pressure quenching. That is to use an external heating furnace to heat the workpiece to the quenching temperature, and then transfer it to a device with a mechanical upper and lower die to apply a certain pressure and quench it. An expandable mandrel is generally also included for positioning the die. After quenching, ...

AI Technical Summary

Problems solved by technology

Since the workpiece is transferred at high temperature, it is more complicated for the transfer mechanism to be able to hold the hot parts.

The upper and lower dies have a certain effect on reducing plane warping, but the expansion mandrel is not reliable for the control of the roundness of the workpiece; if the integral mandrel is used, due to the shrinkage during quenching, the workpiece must be removed and tempered. The core mold is pulled out by a large external force, which often causes the surface of the core mold and even the inner hole of the workpiece to be strained, the mold life is short, and the cost is high

[0004] The conventional method requires a lot of equipment, and the manual transfer in the middle is labor-intensive; especially for the out-of-roundness caused by factors such as the clamping of the workpiece and its own weight during the heating process, the conventional die-quenching method cannot improve

Therefore, the pass rate is relatively low

Images