Laser treatment method for working part of extrusion die

Abstract

The invention discloses a laser treatment method for a working part of an extrusion die. The method includes the following steps that S1, a quasi finished product of the extrusion die is subjected toheat treatment to enable the basic hardness to be 48-50 HRC; S2, a profiled hole and the surface of the working part of the extrusion die are analyzed and checked; S3, the working part of the extrusion die is subjected to laser treatment through a laser unit, laser parameters are adjusted according to the size of the working part, and the working part of the extrusion die is subjected to laser bombardment, wherein the adjusted parameters include the laser inlet angle, the laser power, the laser focal length, laser spots and the laser bombardment speed; and S4, the working part, obtained afterlaser treatment, of the extrusion die is finely machined and ground and polished. The machining period of the die can be effectively shortened, the hardness of the working part of the die is improved,and the service life is prolonged; the surface quality and the performance quality of the extrusion product are improved; and sewage, waste oil and waste gas are not discharged in the treatment process by means of the method, and therefore energy saving and environmental friendliness are achieved.

Description

technical field [0001] The invention relates to the technical field of modifying the working part of an extrusion die, in particular to a laser treatment method for the working part of an extrusion die. Background technique [0002] Entering the era of new technology revolution, my country needs more and more high-quality extrusion profiles in aerospace, aviation, electronic information, high-speed railway, automobile and other industrial fields. However, to obtain high-quality extrusion profiles, the requirements for extrusion dies are also increasing. come higher. Due to the extrusion force, thermal fatigue, material friction and other forces during the extrusion die, the performance of the working part of the die is reduced or damaged, which affects the life of the die and the quality of the extruded product. [0003] In the prior art, there are two ways to harden the working part of the extrusion die, one is heat treatment, and its hardness is roughly 48-50HRC. Another ...

AI Technical Summary

Problems solved by technology

Another treatment method is nitriding treatment, which refers to the chemical treatment method that makes nitrogen atoms penetrate into the surface layer of the workpiece in a certain medium at a certain temperature, which can increase the hardness to 55-58HRC, but the hardness layer is shallow, about 0.2-0.3mm, and The nitriding treatment takes a long time, and it is easy to wear the hardened layer during the practical process of the mold. Multiple nitriding treatments are required, the treatment cost is high, the cycle is long, and there is waste water and waste gas discharge