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Working principle of slow wire processing

 Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better t

Classification of CNC Machining Occupation Levels

1. Blue-collar layer:   That is, CNC machining operation technicians, proficient in machining and CNC machining process knowledge, proficient in the operation and manual programming of CNC machine tools (attributes: automated machine tools), understand automatic programming and simple maintenance of CNC machine tools (attributes: automated machine tools), such There is a large market demand for personnel, and they are suitable for operating workers of CNC machine tools (attributes: automated machine tools) in the workshop, but due to their single knowledge, their wages will not be much higher.   2. Gray collar layer:   One, CNC machining programmer:   Master the knowledge of 5 Axis CNC machining Aluminum   technology and the operation of CNC machine tools (attributes: automated machine tools), be familiar with the design and manufacturing expertise of complex molds (title: mother of industry), and be proficient in 3D CAD/CAM software, such as UG, GOOGLE PRO/E, etc. ; Familiar with CNC

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and lette

The ability to integrate the application of multifunctional plastics in car body parts

 

No matter what kind of coating process is used for the surface quality of automobiles, the surface quality of the plastic parts of the car body must meet the requirements of Class A. Therefore, plastics must have good processing fluidity. In addition, in order to ensure the smallest possible gap size between parts under extreme temperature conditions, the thermal expansion coefficient of the body plastic parts must be small. If the body plastic part is used as the skin of the metal substrate, the quality of the appearance can only be guaranteed when the thermal expansion coefficient of the substrate and the surface layer are close. Generally, the coefficient of thermal expansion of thermoplastics is much larger than that of steel. Fillers are generally added to reduce the coefficient of thermal expansion. However, the addition of fillers tends to always reduce the surface quality. Fiber-reinforced thermosetting plastics can mostly meet the requirements of car body structural parts in terms of strength and rigidity, but its surface quality is often difficult to meet the A-level requirements. In addition, it is difficult to paint fiber reinforced plastics.

Another option to solve this problem is to use an injection compounding process, that is, a highly filled plastic and a colored high-quality film/sheet are compounded by injection. The composite parts produced no longer need to be painted and can meet the requirements of Class A surface quality. BASF cooperated with other companies to study the injection and compounding of long-fiber reinforced ABS with polymethyl methacrylate and ASA co-extruded film to produce the tail cover (luggage compartment cover) of the car; GE produced a polycarbonate co-extruded film. Extruded sheet (model: Sollx), which has been used in the production of body parts for mini-cars 2 Current status of the application of plastics on car bodies 2.1 Plastics for body parts are light in weight, good in processability, high in design freedom, and multi-functional The ability of plastics to be integrated in the application of car body parts is one of the most interesting aspects of plastics as a body material. Especially in today’s era where individualization is emphasized, the style of the car has a great influence on the customer’s desire to buy. The plastics currently used as bodywork mainly include sheet molding compound (SMC), reinforced reaction injection polyurethane (PUR-RRIM) and glass fiber reinforced thermoplastics. All three types use glass fiber reinforcement, mainly to meet the rigidity requirements of the car body.

For automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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