Preparation method of supercharger oil return pipe

Abstract

The invention discloses a preparation method for an oil return tube of a booster. The preparation method comprises the following steps of selecting a metal tube with a certain dimension as a base material and firstly performing corrugated section molding: adopting water-pressure molding, fixing the metal tube with an anti-skidding clamping mould, fixing the mould on the metal tube and performing transverse extrusion with 600 MPa high-pressure water; adopting a tube bender to bend the metal tube: according to an inner diameter dimension of the metal tube, inserting a universal rotary core rod capable of rotating by 360 degrees into the metal tube, rotating the universal rotary core rod during processing, placing a bronze cushion block which is used as a liner and capable of preventing the bent part from being wrinkled on a lower surface of a to-be-bent part of the metal tube, extruding the upper surface of the bent part through a pressure wheel for bending the upper surface into a required angle; respectively welding matched flanges at the two ends of the bent and molded bent tube. The preparation method is simple and reasonable in process, and can control the angle and the smoothness of the bent part of the steel tube very well; the prepared oil return tube is uniform in thickness and smooth, uniform in corrugated section, accurate in bending angle, low in manufacturing cost and long in service life, and combines rigidity and flexibility.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and relates to a supercharger oil return pipe, in particular to a preparation method of a supercharger oil return pipe. Background technique [0002] The oil return pipe of the supercharger is the return pipe of the lubricating oil of the supercharger, and it is an important part to ensure the effective lubrication of the supercharger. At present, the oil return pipe of the turbocharger on the market generally adopts the following structure: 1. Full bellows, the oil return pipe of this structure is poor in rigidity, easy to crack and break, resulting in oil leakage from the oil return pipe; 2. Hard pipe + rubber pipe +The connection method of hard pipe, this structure has better rigidity, but poor assembly, complex process, and rubber is easy to age and burst, and cannot be used normally in high temperature areas; 3. The connection method of hard pipe + bellows is adopted, suc...

AI Technical Summary

Problems solved by technology

At present, the oil return pipe of the turbocharger on the market generally adopts the following structure: 1. Full bellows, the oil return pipe of this structure is poor in rigidity, easy to crack and break, resulting in oil leakage from the oil return pipe; 2. Hard pipe + rubber pipe +The connection method of hard pipe, this structure has better rigidity, but poor assembly, complex process, and rubber is easy to age and burst, and cannot be used normally in high temperature areas; 3. The connection method of hard pipe + bellows is adopted, such as the patent number The 200920141191.8 Chinese utility model patent "A Supercharger Oil Return Pipe" includes flanges, oil return pipes, bellows and pipe clamp components. It welds the steel pipe and the bellows into one, taking into account the advantages of the steel pipe and the bellows , but the two materials are different, welding is difficult, easy to break and desolder due to vibration, and the process is more complicated

[0003] After investigation, the existing Chinese utility model patent No. CN201220728569.6 "A Supercharger Oil Return Pipe with Improved Structure" includes a bellows, one end of the bellows is connected with a joint, and the other end is connected with a flange; The corrugated pipe includes a smooth pipe and a corrugated section, and the corrugated section is arranged at the bending position of the corrugated pipe; the wall thickness of the corrugated pipe is 0.3mm-0.5mm, and the supercharger oil return pipe of this structure takes into account both rigidity and Flexible, wide temperature range, simple process, and low cost, but it is to set the corrugated section at the bending position of the oil return pipe. If there are many bending positions, it is necessary to set more corrugated sections. The number of corrugated sections Increase will affect the rigidity and strength of the oil return pipe

Therefore, at present, in the preparation technology, steel pipes are also directly bent into shape, but it is easy to wrinkle at the bend, resulting in uneven thickness, and it is not ideal in controlling the angle and smoothness of the bend, and needs further improvement

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