Different from traditional machining methods, special machining methods are the general name of a series of machining methods that use chemical, physical (electrical, acoustic, optical, thermal, magnetic) or electrochemical methods to remove workpiece materials.
What are the cutting process characteristics of machining center
Machining center machine tool.
1、It has high stiffness and good vibration resistance. In order to meet the machining requirements of high automation, high precision, high efficiency and high reliability, the static stiffness and dynamic stiffness of the machining center are higher than those of ordinary NC machine tools; Due to the high damping ratio of its mechanical structure system, the anti vibration performance of the machine tool is also higher than that of the ordinary NC machine tool in the machining process.
2、Process concentration. The machining center has a tool magazine (as shown in Figure 2-16) and can change tools automatically, which is the main difference between machining center and NC milling machine. Before machining, adjust and measure the required tools, and then load them into the tool magazine. During machining, the corresponding tools can be changed automatically through program control, so as to process the workpiece in multiple processes. Modern high-speed machining center makes the workpiece realize continuous, efficient and high-precision machining with multiple surfaces, features and stations after one clamping, that is, process concentration. This is the most prominent feature of machining center.
3、Strong adaptability to processing objects. The flexibility of machining center production is not only reflected in the rapid response to special requirements, but also can quickly realize mass production and improve market competitiveness.
What is the difference between milling and grinding
Grinding is one of the widely used cutting methods, which uses abrasives and abrasives to cut off the excess materials on the workpiece. Milling is to use the milling cutter as the tool to process the surface. This method is called milling. Milling machines include horizontal milling machine, vertical milling machine, gantry milling machine, profiling milling machine, universal milling machine and bar milling machine.
Grinding is to process the workpiece surface with abrasive tools. Most grinding machines use high-speed rotating grinding wheels for grinding, and a few use oilstone, abrasive belt and other abrasives and free abrasives for grinding. Grinding machine can process materials with high hardness, such as hardened steel, cemented carbide, etc; It can also process brittle materials, such as glass and granite. The grinder can be used for grinding with high precision and small surface roughness, as well as high efficiency grinding, such as strong grinding. The grinding speed is related to the motor speed. If the temperature is greater than 60 ℃, the machine must be shut down. Milling is to fix the blank, use a high-speed rotating milling cutter to walk on the blank and cut out the required shape and features. Traditional milling is mostly used for milling simple shapes / features such as contours and grooves. From the comprehensive cost of grinding and milling, there is no comparison between them. Milling is the cutting movement of the cutting edge of the milling cutter; There are many fine particles in grinding, and the grinding wheel has self sharpening, so the means of grinding can achieve high machining accuracy in practical application! I have a cutting manual, which is very detailed and needs to be contacted WEDM service, milling is rough machining. Grinding is finishing. Grinding is to process the workpiece surface with abrasive tools. Most grinding machines use high-speed rotating grinding wheels for grinding, and a few use oilstone, abrasive belt and other abrasives and free abrasives for grinding. Grinding machine can process materials with high hardness, such as hardened steel, cemented carbide, etc; It can also process brittle materials, such as glass and granite. The grinder can be used for grinding with high precision and small surface roughness, as well as high efficiency grinding, such as strong grinding. The grinding speed is related to the motor speed. If the temperature is greater than 60 ℃, the machine must be shut down.
Milling is to fix the blank, use a high-speed rotating milling cutter to walk on the blank and cut out the required shape and features. Traditional milling is mostly used for milling simple shapes / features such as contours and grooves.
From the comprehensive cost of grinding and milling, there is no comparison between them. One is processed by grinding machine and the other is processed by milling machine.
What are the characteristics of grinding? What are the characteristics of grinding force
Grinding is actually a process of simultaneous cutting with multiple tools. The feed rate of grinding is small and the cutting force is usually small, but the grinding speed is high (30-80m / s). Therefore, the temperature in the grinding area is usually high, up to 800-1000 ℃, which is easy to cause local burns on the workpiece surface. The thermal stress of grinding will deform the workpiece and even crack the workpiece surface; At the same time, because the grinding process will produce a large number of metal debris and grinding wheel sand.
