Automobile axle case piece hydraulic-bugling two-stage pressurization system

Abstract

The invention discloses an automobile axle case piece hydraulic-bugling two-stage pressurization system which is composed of a low-pressure liquid injection system, a bugling two-stage pressurization system, an ultra-high-pressure relief system and an electric control system. The low-pressure liquid injection system injects liquid rapidly into a pipe blank through water pumps before bulging. The bugling two-stage pressurization system comprises a single-cavity type work feeding pressurizer and a two-cavity type shape correction pressurizer, the work feeding pressurizer is used for supplementing high-pressure liquid at large flow in an axial material supplementing and bulging stage of the pipe blank, the shape correction pressurizer is used for supplementing liquid and correcting the shape of a pipe after dies are closed, oil is supplied to low-pressure cavities of the two pressurizers through an oil pump, and the flow and the pressure of oil output by the oil pump are accurately controlled through a proportional overflow valve and a proportional throttle valve. According to the ultra-high-pressure relief system, one-way valves connected with the pipe blank are controlled by a pressure relief pressurizer to conduct sealing operation in the bulging process and to release pressure rapidly after the bulging process. By the adoption of the automobile axle case piece hydraulic-bugling two-stage pressurization system, the high-pressure liquid supplementing flow is large, pressure control accuracy is high, pipe forming quality is good, system energy consumption is low, efficiency is high, and the system is safe and reliable.

Description

technical field [0001] The invention relates to a hydraulic bulging supercharging system for pipe fittings, in particular to a hydraulic bulging double-stage supercharging system for automobile axle housings. Background technique [0002] The automobile axle housing is a key component on the automobile chassis. It belongs to the large-sized special-shaped cross-section pipe parts. At present, it is mainly manufactured by casting and stamping welding methods. Recently, the hydraulic bulging process has appeared. The overall forming of the parts has no welds and is lighter than castings It has higher performance than stamped weldments, and the production process is pollution-free. [0003] During hydraulic bulging of pipe fittings, a booster system is required to inject high-pressure liquid into the pipe blank. For pipe fittings with small bulging volume that do not require axial feeding, a single-chamber high-pressure booster can be used to provide a high enough pressure to ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the hydraulic bulging process of automobile axle housing pipe fittings, the fluid flow rate during the axial feeding bulging stage is large, and the accuracy of the liquid pressure is high. In order to solve the problem of engineering practice of pressure, the present invention provides a two-stage pressurized system for hydraulic bulging of automobile axle housings to solve the above-mentioned technical problems in the existing engineering practice of hydraulic bulging of automobile axle housings.

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