Category: Manufacturing Technology knowledge

CNC hand board processing is usually divided into four links: 1. Rough machining. Rough machining is mainly to cut off most of the machining allowance on each surface to make the shape and size of the blank close to the finished product. This stage is characterized by the use of high-power machine tools and large cutting tools to improve productivity and reduce tool wear as much as possible. 2. Semi finishing. Semi finishing is to finish the machining of the secondary surface and prepare for the finishing of the main surface. 3. Finish machining. Finish machining is to ensure that…

Integral impeller is the core component of turbo engine and turbocharged engine. It is widely used in energy and power, aerospace, petrochemical industry, metallurgy and other industries. It is a representative, standardized and typical channel complex part. The machining means, machining accuracy and machining surface quality of its profile directly affect the aerodynamic performance and mechanical efficiency of the engine, and have a decisive impact on the performance of the engine. Integral impeller has become a typical difficult to machine part because of its complex surface and high machining precision. With the increasing market demand for turbine engine, it is…

Abstract: five axis linkage milling can optimize the cutting process and parameters, which is conducive to reducing tool wear and post machining. It is the trend of the development of automobile mold processing technology. It is suitable for machining convex surface and shallow concave surface with small curvature with ball end milling cutter. It can also be used for machining free surface with side of milling cutter. The 3 + 2 axis machining method can speed up the tool walking to the greatest extent. NC milling has higher precision and less post-processing than profiling milling. The realization of five axis…

With the rise of the automobile industry, there are more and more five axis CNC machine tools. However, in the current market, there are few real five axis (RTCP function) machine tools and many fake five axis (only indexing function) machine tools. What is true five axis, what is false five axis, and what is the difference between three axis? The following description is as follows. True five axis has RTCP function. It can automatically convert according to the swing length of the main shaft and the mechanical coordinates of the rotating table. When compiling the program, only the coordinates…

The modeling design of mechanical products belongs to the category of "industrial design". Industrial design is a new frontier discipline in modern times. It is a creative design that applies engineering technology and artistic means to design and shape the image of products, and finally unifies it in the function, structure, process, agreeableness, visual communication and market relationship of products, so as to achieve the harmony between man, machine (product) and environment. With the advance of the times, the development of science and technology, the improvement and change of people's aesthetic concept, the modeling design of mechanical products, like other…

EDM is an important process method of mold manufacturing, especially in plastic mold manufacturing. The cavity of plastic mold, many groove corners of sliding block, insert, inclined pin and other parts need EDM. Because EDM is a process method with slow processing speed, EDM needs to spend more man hours in mold manufacturing. How to improve the machining speed of EDM machine tools on the premise of ensuring the machining quality through effective and feasible process measures, and how to shorten the mold manufacturing cycle and reduce the mold manufacturing cost by relying on high-efficiency EDM production has always been…

Thermit welding: during welding, the ends of the two workpieces to be welded are fixed in the mold in advance, and then the mixture of aluminum powder and iron oxide powder (called thermite) is heated in the crucible to make it undergo reduction exothermic reaction to become liquid metal (iron) and slag (mainly Al2O3) and injected into the mold. The liquid metal flows into the gap of the joint to form the weld metal, and the slag floats on the surface. Sand mold casting: a casting method for generating castings in sand mold. Basic raw materials: casting sand and molding…

The disassembly of rolling bearing is one of the important disassembly contents in mechanical maintenance. Disassembly must follow the basic rules of bearing disassembly and assembly, and different disassembly tools and methods should be adopted for different bearings. When the bearing fits tightly with the shaft and loosely with the seat hole, the bearing and the shaft can be removed from the housing together, and then the bearing can be removed from the shaft with a press or other removal tools. Here are some common bearing disassembly methods: 1. Removal of inner / outer ring. Remove the outer ring of…

Shot blasting is to use the high-speed rotating impeller to throw out small steel shot or small iron shot and hit the surface of the part at high speed, so the oxide layer on the surface of the part can be removed. At the same time, steel shot or iron shot impacts the part surface at high speed, resulting in lattice distortion and deformation of the part surface and increasing the surface hardness. It is a method to clean the part surface. Shot blasting is often used to clean the casting surface or strengthen the part surface. Generally, shot blasting…

High speed machining (HSC), which emerged in the late 1980s, greatly shortens the machining time and improves the surface quality and machining accuracy of the workpiece because it significantly improves the cutting speed and feed speed. Therefore, it can reduce processing procedures and simplify production process, and promote the transformation of production mode in some industries, which effectively promotes the development of the whole production technology. High speed machining integrates the two contradictory characteristic parameters of "productivity" and "flexibility", so that the flexible production system composed of high-speed machining center can replace the traditional rigid automatic line, and promote the…