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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

Types and advantages of fan blades of centrifugal fans

Types and advantages of fan blades of centrifugal fans

 

 

Centrifugal fan is only one of many fan products, it has good performance, which is also closely related to the design of its blades. The same centrifugal fan is configured with different blade types to meet different application requirements.

 

1. Backward curved fan blades

 

This kind of blade can also be divided into single-plate type and wing type. The backward-curved single-plate blade has large structure size, low pressure coefficient and high efficiency. Therefore, the dynamic pressure accounts for a small proportion of the total pressure. Suitable for heavy wear, i.e. relatively high price. Backward curved wing blades have the same characteristics and should be the most efficient.

 

2. Forward curved blades

 

The blade structure of the forward curved blade is generally smaller, the pressure coefficient is higher, and the efficiency is generally lower. The dynamic pressure accounts for a large proportion of the total pressure, but it has the advantage of low price.

 

3. Radial fan blades

 

In terms of size, the radial fan blades are medium in size; in terms of performance, the pressure coefficient is high, the efficiency is high, and the dynamic pressure accounts for a large proportion of the total pressure, which is suitable for occasions with severe wear; there is no advantage in price.

 

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