The surface quality of Motor housing die-casting mold is directly related to the appearance and performance of die-cast products, so its optimization and defect repair are crucial.
First of all, in the mold manufacturing stage, the processing technology has a significant impact on the surface quality. The use of high-precision CNC processing equipment can ensure that the dimensional accuracy and surface roughness of the mold cavity and core meet the requirements. For example, high-speed milling can obtain smoother processing marks on the mold surface and reduce the subsequent polishing workload. During finishing, reasonable selection of cutting parameters, such as appropriately increasing the cutting speed and reducing the feed, will help reduce the surface roughness value. At the same time, the surface after EDM processing often has defects such as white layers, which require subsequent processing, such as using chemical etching or mechanical polishing to remove the white layers to make the surface more uniform and improve the surface quality of the mold, thereby producing high-quality die-casting products. The motor housing lays the foundation.
Secondly, the heat treatment process of the mold is also a key link in optimizing surface quality. Correct heat treatment can improve the hardness, wear resistance and thermal fatigue resistance of the mold, and indirectly improve the surface quality. For example, when quenching and tempering mold steel, the heating temperature, holding time and cooling rate must be precisely controlled so that the mold can obtain a uniform and stable structure. Improper heat treatment may lead to uneven hardness, deformation and other problems on the mold surface, affecting subsequent use. The optimized heat-treated mold can better maintain shape and dimensional stability during the die-casting process, reduce surface defects caused by mold deformation, such as strains and dents, and make the surface of the motor housing smoother.
Furthermore, defects that have appeared on the mold surface need to be repaired in time. Common defects include surface scratches, abrasions, and localized corrosion. For scratches and minor wear, laser cladding technology can be used, using high-energy laser beams to melt alloy powder and deposit it on the defective parts to form a repair layer that is well combined with the matrix, and then perform subsequent grinding and polishing to restore the mold surface. The flatness and finish. For local corrosion problems, the corrosion products can be removed first, and then electroplating or chemical plating can be used to form a protective coating on the surface to enhance the corrosion resistance of the mold, improve the surface quality, extend the service life of the mold, and ensure the safety of the motor housing die-casting process. Stability and consistency of product quality.
Finally, daily maintenance and upkeep play an indispensable role in maintaining the surface quality of the mold. After each die-casting production, the residual aluminum chips, release agent and other impurities on the mold surface should be cleaned promptly to avoid corrosion or scratches on the mold surface. Conduct comprehensive inspections of the mold regularly. If signs of slight damage are found on the surface, repair them in a timely manner to prevent the expansion of defects. At the same time, the release agent should be selected and used rationally to ensure that it has good lubrication and protection effects on the mold surface, reduce friction and damage to the mold surface during the demoulding process, continue to maintain the good surface quality of the Motor housing die-casting mold, and improve Production efficiency and product quality.
