Laser roughening metal plastic forming mould and its preparation method

Abstract

The invention is a forming mould and a manufacturing method of a laser texturing metal plastic. After being processed by the laser, the hardness of a surface of the forming mould of laser texturing metal plastic is HV800 to 10000, which has the microstructure of crater-shaped micro-geometrical structure consisting of spacing and unevenly distributed micro pits and bosses around the micro pits. Wherein, the geometric parameters of the crater-shaped micro-geometrical structure are: the pit diameter (B) of the pit is 20 to 500 Mu m; the height (h) of the boss is 1 to 8 Mu m; the width (b) of the boss is 3 to 20 Mu m; and distance D between two adjacent pits is 50 to 500 Mu m. The invention has an advantage that surface material is microscopically hardened and pinning is macroscopically strengthened when plastic forming is practiced by the mould, thereby greatly improving properties of wear resistance of the mould. In addition, the micro pits on the surface of the mould can be used fro storing lubrication oil and gathering wear particles, thereby improving lubrication state of the mould to have an effect of lubrication and friction-reducing. And the special laser texturing structure of the surface optimizes forming the technology of the metal plastic.

Description

technical field [0001] The invention relates to the field of metal plastic forming molds, in particular to a method for performing laser roughening surface micro-modeling treatment on the surface of metal plastic forming molds. Background technique [0002] During metal plastic forming, due to the elastic-plastic contact friction between the mold and the workpiece under high pressure, and often under severe working conditions such as high temperature and alternating load, the mold will be deformed, cracked, fatigue cracked, worn out, and its life is low. , where the main failure mode is wear. Wear as the main failure mode of the mold is not an inherent characteristic of the material. It is related to various factors such as working conditions, materials, surface morphology, contact mode, lubricating medium and lubrication mode, and is a dynamic process of energy consumption and material damage. ,hard to control. Therefore, reducing wear and improving the service life of mo...

AI Technical Summary

Problems solved by technology

Chinese patent 90107223.0 discloses a treatment method for mold strengthening and toughening. This method is a heat treatment method for local high-temperature rapid carburization, quenching, and high-temperature tempering of the mold cavity. Although the service life of the mold is increased by 2-3 times, However, there are disadvantages such as large environmental pollution and poor process controllability.

Chinese patent 200410010847.4 discloses a laser quenching and hardening treatment method for cutting tools and mold edges, but this method only performs surface modification treatment on the workpiece, but does not modify the surface of the workpiece

But so far, due to the lack of basic theoretical research on mold texturing and the complex curved surface of the mold, coupled with the fact that only a few countries have mastered laser texturing technology, and people have not yet realized the broad application of laser texturing in molds. Application world, resulting in laser texturing technology has not been applied in the mold

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