Extrusion molding technology of three-way pipe extrusion molding device

Abstract

The invention discloses an extrusion molding technology of a three-way pipe extrusion molding device. The extrusion molding device of a three-way pipe comprises an extrusion main cylinder and two extrusion side cylinders that are all installed on an extruder. The extrusion main cylinder is in connection with an upper die, and a lower die with a branch hole is installed on an operating platform of the extruder. The upper die and the lower die press against each other so as to be bonded into an extrusion cavity for holding pipe billets. The extrusion side cylinders are connected to extrusion heads, one of which is provided with a liquid-filling channel communicated with the extrusion cavity. The device also includes a high pressure liquid generation unit controlled by a servo system, and the unit comprises a pressurizing cylinder and a high pressure cylinder that are mutually communicated. A supercharging piston is disposed between the pressurizing cylinder and the high pressure cylinder, the cylinder body of which is equipped with a liquid inlet hole and a liquid outlet hole, with the liquid outlet hole communicated with the liquid-filling channel and the liquid inlet hole communicated with a reservoir. Besides, the pressurizing cylinder is connected to a proportional servo valve, and the high pressure cylinder is provided with a pressure sensor connected with the servo system and used for detecting the fluid pressure inside the high pressure cylinder.

Description

technical field [0001] The invention relates to a tee pipe extrusion forming device and an extrusion forming process thereof, belonging to the technical field of hydraulic forming processing. Background technique [0002] Pipeline systems, such as water pipelines, oil pipelines, and liquid chemical material water pipelines, generally use tee pipes as intermediate connectors. The traditional manufacturing process of tee pipe is mainly divided into forging, casting and welding, but the waste of raw materials in the forging process is serious and the cost is high; the product quality of the casting process is unstable, and leakage accidents are prone to occur; the welding process is labor intensive and efficient. Low; because there are different degrees of defects in the above three traditional processes. In the 1980s, my country has adopted the extrusion process to manufacture tee pipes. The principle of the extrusion process is: use a special hydraulic press to inject liquid...

AI Technical Summary

Problems solved by technology

The traditional manufacturing process of tee pipe is mainly divided into forging, casting and welding, but the waste of raw materials in the forging process is serious and the cost is high; the product quality of the casting process is unstable, and leakage accidents are prone to occur; the welding process is labor intensive and efficient. Low; due to the different degrees of defects in the above three traditional processes

[0003] At present, my country's tee pipe extrusion process level is still relatively backward compared with developed countries. The main problems are: the extrusion equipment structure and manufacturing process are relatively complicated, and the pressure control is difficult, resulting in unstable product quality; The internal pressure required in the process is high, and the conventional hydraulic system cannot meet the high pressure requirements. The existing solution is to replace some valve components in the original hydraulic system with imported components to increase the pressure, but these imported components cost High, long procurement cycle, not conducive to mass production of products

The pressure is controlled only by the relief valve, the control accuracy is low, the pressure is unstable, and the product yield is low

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