Welded-type integral forged steel piston and manufacturing process thereof

Abstract

The invention discloses a welded-type integral forged steel piston and a manufacturing process thereof. The welded-type integral forged steel piston comprises a piston head and a piston skirt which are formed by forging and fixedly connected; a closed cooling oil cavity is formed between the piston head and the piston skirt and communicates with the exterior through an oil inlet hole and an oil outlet hole; an annular inner welding shoulder A and an annular outer welding shoulder A are coaxially arranged at the bottom end of the piston head, and an annular inner welding shoulder B and an annular outer welding shoulder B which are matched with the inner welding shoulder A and the outer welding shoulder A correspondingly are coaxially arranged at the top end of the piston skirt; the inner welding shoulder A and the inner welding shoulder B are welded through friction welding to form a main welded seam; and the outer welding shoulder A and the outer welding shoulder B are welded through fusion welding to form an auxiliary welded seam. According to the welded-type integral forged steel piston and the manufacturing process thereof, the structure is reasonable, safety and reliability areachieved, and the production efficiency is high.

Description

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AI Technical Summary

Benefits of technology

This technology describes how it makes possible to make strong but lightweight forgings without requiring expensive machinery or toolry during production. By doing this, we aim to improve efficiency by allowing more efficient utilization of space while maintaining high levels of performance.

Problems solved by technology

The technical problem addressed in this patents relates to improving the performance and durability of steel forge pists used in vehicles such as cars without losing their ability to work properly when they hit stronger objects like rocks during braking operations. Current methods involve adding expensive alloys (such as chrome) but these techniques may result in reduced productivity and costly repairs/replacements overall.

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