Polishing knowledge related to titanium alloy screws
In the process of diversified and high-end development of industrial products, how to improve the quality of molds that directly affect product quality is an important task. In the manufacturing process of Titanium Alloy Screw molds, the smooth processing and mirror processing after shape processing are called part surface grinding and polishing processing, which are important processes to improve the quality of the mold. Mastering reasonable polishing methods can improve the quality and service life of titanium alloy screw molds, thereby improving product quality. Common polishing methods and working principles 01 Mechanical polishing Mechanical polishing is a polishing method that removes the protruding parts of the workpiece surface by cutting or causing plastic deformation on the material surface to obtain a smooth surface. It generally uses oilstone strips, wool wheels, sandpaper, etc., and is mainly manually operated. For surfaces with high quality requirements, ultra precision polishing can be used. Ultra precision polishing is the use of specially designed grinding tools, which are tightly pressed onto the machined surface of the workpiece in a polishing fluid containing abrasives and perform high-speed rotational motion. By utilizing this technology, Ra0.008 can be achieved μ The surface roughness of m is the best among various polishing methods. This method is often used in optical lens molds. Mechanical polishing is the main method of mold polishing. 02 Chemical polishing Chemical polishing is the process in which a material preferentially dissolves the micro protruding parts of the surface in a chemical medium, resulting in a smooth surface. This method can polish workpieces with complex shapes and can simultaneously polish many workpieces with high efficiency. The surface roughness obtained by chemical polishing is generally Ra10 μ M. 03 Electropolishing The basic principle of Electropolishing is the same as that of chemical polishing, that is, by selectively dissolving the small protruding parts on the surface of the material, the surface is smooth. Compared with chemical polishing, it can eliminate the influence of cathodic reactions and has a better effect. 04 Ultrasonic polishing Ultrasonic polishing is a machining method that uses tool cross-section for ultrasonic vibration to polish brittle and hard materials through abrasive suspension. Place the workpiece in an abrasive suspension and place it together in an ultrasonic field, relying on the oscillation effect of the ultrasonic wave to grind and polish the abrasive on the surface of the workpiece. Ultrasonic machining has low macroscopic force and will not cause deformation of the workpiece, but it is difficult to make and install tooling. 05 Fluid Polishing Fluid polishing is achieved by flushing the surface of a workpiece with flowing liquid and its carried abrasive particles. Fluid power grinding is hydraulically driven, and the medium is mainly made of special compounds (polymer like substances) with good flowability under low pressure and mixed with abrasives, which can be silicon carbide powder. 06 Magnetic Grinding Polishing Magnetic abrasive polishing is the use of magnetic abrasives to form abrasive brushes under the action of a magnetic field, which grind and process workpieces. This method has high processing efficiency, good quality, and easy control of processing conditions. By using appropriate abrasives, the surface roughness of the processed material can reach Ra0.1 μ M. 07 Electric Spark Ultrasonic Composite Polishing In order to improve the surface roughness Ra to 1.6 μ The polishing speed of workpieces above m is achieved by using ultrasonic waves and specialized high-frequency narrow pulses
