Technique of laser hardening ossifying process of vehicle mold

Abstract

The invention relates to a vehicle mould quenching hardening process, which comprises the following steps: firstly detergent is used to remove oil and dust on the workpiece surface; secondly the Sio2 absorption coating material is sprayed uniformly on the vehicle mould surface in a pre-thickness of 0.02 mm to 0.05 mm with a brush; thirdly the Sio2 coating is naturally dried; fourthly a high power CO2 laser is applied to quickly scan the sprayed mould surface to achieve rapid surface heating and cooling. The laser power P is from 2,000W to 5,000W and the scan speed V is from 200 mm per min to 800 mm per min. The invention controls the surface uniform easily, improves the surface finish and dimensional accuracy of the stamping parts, greatly reduces the grinding time so as to improve the work efficiency and reduce the cost. In addition, the applied NC programming system can quench harden complex shaped moulds. The system is also fit for newly produced moulds without or with surface quenching process.

Description

technical field [0001] The invention relates to a process for laser quenching and hardening of automobile molds, which belongs to the field of automobile mold hardening techniques. Background technique [0002] Automobile molds, especially large-scale panel molds, are key process equipment for automobile production. Due to their large structural size, complex mold surface shapes, and high requirements for dimensional accuracy and surface quality, the mold manufacturing cycle is long and the cost is high. Moreover, during the working process, the automobile panel mold must bear strong friction, radial stress and compressive stress, and is often scrapped due to dimensional wear and grooves on the surface. Therefore, the panel mold should have high hardness and wear resistance. Due to the large size and complex shape of automobile molds, they are usually cast from alloy cast iron and generally require subsequent surface treatment. Some traditional processing methods, such as f...

AI Technical Summary

Problems solved by technology

Some traditional processing methods, such as flame quenching, often appear in the process of production and use, such as insufficient surface precision or dimensional deviation of the stamped cover.