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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

Elimination of Gear Backlash in CNC Machining Feed System

Elimination of Gear Backlash in CNC Machining Feed System   The transmission gear in the feed system of the CNC machining machine tool must eliminate the transmission gap between the meshing gears as much as possible, otherwise the motion will lag behind the command signal after each reversal of the feed system, which will affect the machining accuracy (accuracy) ). There are the following two common methods for CNC machining machine tools to eliminate the transmission gear gap.   1. Rigidity adjustment method   The rigid adjustment method is an adjustment method that cannot be automatically compensated for the tooth side clearance after adjustment. Therefore, the pitch tolerance and tooth thickness of the gear must be strictly controlled, otherwise the flexibility of the transmission will be affected. This adjustment method has a relatively simple structure and a better transmission rigidity.   (1) Eccentric shaft adjustment method   As shown in Figure 610, the gear 1 is mounted on th

What are the requirements for the runners of die-casting molds?

The runners of die-casting molds have corresponding requirements, so we need to understand these requirements as much as possible, which is of great help for us to use die-casting molds.

1. All molds should shorten the runner stroke as much as possible and reduce the cross-sectional area as much as possible on the premise of ensuring the forming quality. The cold slug hole is 1.5 times the diameter of the runner. All runners require cold slug holes, such as: below the mouth, The end of the runner, below the glue inlet of the fine nozzle, etc.

2. All fine nozzle molds, mold runners and nozzle hooks must be polished. It is necessary to ensure that the glue inlet is smooth, reduce the injection pressure and no residues are left on the product.https://ptjcnc.com

3. The flow channel section of the large nozzle mold should be round or up and down ellipse, that is, the height dimension is 0.5-1.0 larger than the width dimension and must be aligned before and after, and there should be no misalignment in polishing. In special circumstances, the unilateral flow path is required to be trapezoidal.

4. The inlet and nozzle positions should not be in the obvious appearance. The glue inlet point of the electroplating product should ensure the strength. The glue inlet point of the large nozzle and the product contact should be the knife edge surface with the smallest cross-sectional area to ensure that no residue remains after removal. Product.https://numerical-control.com/

5. The position of the thimble or hook pin for diving into the glue must be at a certain distance from the glue inlet of the parting surface, which is about 1.5 times the diameter of the runner, in order to ensure the toughness of the dive inlet. The diving gate must be polished.

6. The injection point of the large nozzle of the gear die is at the bottom of the tooth surface. Use a Φ1.0 milling cutter to align the tip of one of the teeth with a depth of 0.5-0.6, a width of 1.2, and a depth of 1.5, AB plate inserts. When inlaid through-holes are to be proceassed together, if through-holes are not inlaid, it is necessary to use the centering rod to center repeatedly to ensure concentric accuracy. The barrel needle of the rear mold is inserted into the front mold, and a drill bit smaller than the processing hole diameter must be used to make it thicker to facilitate the copper electric discharge machining.

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