Method for quenching end socket ribbet position of assembled camshaft

Abstract

The invention relates to a method for quenching a notch part at the end of an assembled camshaft. The invention is characterized in that the method comprises the following steps: fastening a contact plate of a quenching inductor and a quenching transformer of a quenching machine together; placing the notches of parts downwards on the boss of a locating plate; pressing down a start button to allowan alternating current and the quenching inductor to form a circulating current via two polar plates of the quenching transformer, thus producing an induced current in the metal parts adjacent to active wires for heating the parts for 2 to 3 seconds; stopping heating when the parts are heated to a temperature 50 DEG C higher than the austenitizing temperature of the material; completely cooling for 5 seconds through water spraying; and finishing the quenching process of the parts by taking the parts down from the locating plate after cooling. The method can solve the problem with the distribution uniformity of effective hardening layers in induction quenching and reduce the heat penetration depth of the induced current; the method adopts the short-time rapid heating manner, thereby reducing the heat conduction time; the heat-affected zone (HAZ) of the parts is reduced; and the quenching inductor has the advantages of simple structure, short process time and high production efficiency.

Description

Technical field: [0001] The invention relates to a method for quenching the notch of the end head of an assembled camshaft. Background technique: [0002] In modern automobile manufacturing, the assembled camshaft of the engine is one of the more advanced technologies. The end acts as a plug-in coupling in the camshaft assembly, and the notch of the working part bears impact and friction. According to its working conditions and service conditions, both sides of the notch are required to have higher hardness to improve wear resistance and strength during the manufacturing process, and induction hardening is required. This part requires induction hardening on both sides of the notch with a width of 8mm and a height of 8.5mm. Due to the small space of the quenching part, it is very difficult to arrange the effective wires of the inductor in the notch; limited by the shape and size of the part, the Positioning is difficult; due to the small size of the parts and the small heat ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method for quenching the notch of the end of an assembled camshaft, which ① uses a newly developed new sensor and reasonable process parameters, and the induction hardening quality of the part meets the induction hardening technical requirements specified in the product drawings , to meet the use performance; ②The structure of the inductor is simple, the process time is short, and the production efficiency is high; ③The problem of the difficulty in positioning the part and the uniformity of the effective hardened layer distribution is solved with a simple method; ④The new type of induction quenching used in the part Inductors can be extended for induction hardening of similar parts

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