In the process of diversification of industrial products and high-quality development, it is an important issue that how to improve the quality of molds directly affects the quality of products.
In the manufacturing process of screw molds made of titanium alloy, smooth processing and mirror surface processing after shape processing are called surface grinding and polishing of parts. This is an important process for improving the quality of molds.
With proper polishing methods, you can improve the quality and life of titanium alloy screw molds and improve the quality of your products.
Today, Kangding shares more comprehensive and practical titanium polishing information with its customers and hopes that buyers will know about titanium alloy screw polishing!
Commonly used titanium alloy screw polishing method and working principle
1. Mechanical polishing
Mechanical polishing is a polishing method in which the surface of a material is cut or plastically deformed to remove protrusions on the surface to obtain a smooth surface. Petroleum strips, wool wheels, sandpaper, etc., which are mainly manual and require surface quality, are used, and ultrafine polishing methods can be used. Super grinding and polishing are special grinding tools. The polishing liquid containing the abrasive is pressed against the machined surface to perform a high-speed rotary motion. With this technique, a surface roughness of Ra0.008 μm can be achieved, and the surface roughness of various polishing methods is optimal. This method is commonly used for optical lens molds. Mechanical polishing is the main method of mold polishing.
2. Chemical polishing
Chemical polishing is a process in which a material in a chemical medium preferentially dissolves slightly convex portions of the surface to obtain a smooth surface. You can polish complex shaped workpieces and efficiently polish many workpieces at the same time. The surface roughness obtained by chemical polishing is usually Ra 10 μm.
The basic principle of electrolytic polishing is the same as that of chemical polishing, that is, to selectively dissolve the surface of the material in order to smooth the surface. Compared with chemical polishing, the influence of the cathode reaction can be eliminated, and it has a good effect.
4. Ultrasonic polishing
Ultrasonic polishing utilizes ultrasonic vibration of the tool part. A method of polishing a brittle hard material using an abrasive suspension. The workpiece is placed in a grinding suspension and placed together in an ultrasonic field, the abrasive is ground by the action of ultrasonic waves and polished on the surface of the workpiece. Ultrasonic processing is small and does not cause deformation of the workpiece, but it is difficult to make and install toolings.
5. Abrasive liquid
Fluid polishing depends on the flowing liquid and the abrasive particles carried to clean the surface of the workpiece for polishing. Hydrodynamic grinding is hydraulically driven. This medium is mainly made of special compounds (polymers) that flow at lower pressures and are incorporated into abrasives made of silicon carbide powder.
6. Magnetic polishing and polishing
Magnetic grinding and polishing is the use of magnetic abrasives to form grinding brushes and polish workpieces under the action of a magnetic field. This method has high processing efficiency, good quality, and easy control of processing conditions. With the right abrasive, the surface roughness of the machine can reach Ra 0.1 μm.
7. Electric Spark Ultrasonic Composite Polishing
In order to increase the polishing speed of workpieces with a surface roughness Ra of 1.6 μm or more, ultrasonic polishing and a dedicated high-frequency narrow-pulse high-peak current pulse power supply are used for composite polishing. Ultrasonic and electrical vibration pulses act simultaneously on the surface of the workpiece, rapidly reducing surface roughness. This is very effective for polishing the rough surface of the mold after machining by automobile, milling, sparking and wire cutting.