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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

Precautions for the selection of oil and gas lubrication products for high-speed electric spindles

High-speed electric spindles are currently mainly used in high-speed engraving and milling machines and grinders. The reliable guarantee of high-speed operation of electric spindles and the choice of products are particularly critical. The current lubrication methods are divided into: grease, oil mist, and oil and gas. Grease-lubricated electric spindles are not high in speed, and all bearings are packaged when they are selected. For high-load electric spindles, this lubrication method is both advantageous, and the advantage is that the investment cost of electric spindles is low. Oil mist lubrication: In fact, when the electric spindle is designed with only one lubrication inlet, this lubrication method is not conducive to the reliable and effective supply of lubrication, excessive consumption of oil and the risk of pollution to the operating environment. The economic cost is not good. Oil-air lubrication: Due to the obvious advantages of oil-air lubrication, current electric spindle design manufacturers generally adopt it. Let me talk about the requirements for oil and gas lubrication of electric spindles: 1. Lubricant cleanliness grade: 13/10 (ISO4406);

2. Air cleanliness: the air filtration accuracy is 0.01 micron;

3. Air dryness: dew point is +2℃;

4. The inlet gauge pressure in front of the bearing nozzle: 2-3bar;

5. Oil and gas pipeline: the inner diameter is 2 to 2.5mm, and the transparent pipeline with small bending radius is not easy to bend;

6. The length of the oil and gas pipeline: the ideal length is 1 to 4 meters. The spiral pipe at the distance from the terminal lubrication point is conducive to oil storage. When the bearing stops and runs again, it is helpful for the oil and gas to be in place quickly and shorten the response time. So when choosing oil and gas lubrication products, you must first meet the above requirements. In addition, the performance of oil and gas lubrication products can achieve good oil and gas transmission to the electric spindle and achieve reliable and stable operation.

1. Precisely quantified oil, and the amount of oil delivered to each lubrication of the bearing end can be adjusted arbitrarily, ranging from 5-40mm3.

2. Digital display time setting: It can realize the arbitrary setting of the oil supply cycle time.

3. Pressure monitoring: It can monitor the oil and gas delivery pressure or the gas source pressure, with priority to monitor the oil and gas pressure.

4. Oil supply status monitoring: As the amount of oil supplied per unit time of the electric spindle is small, and the interval of oil supply is 3min-7min, or even longer, the stability test of each lubrication point each time is an important indicator.

5. Bearing cavity pressure: the oil and gas pressure should be adjustable and set.

6. Display and fault feedback: The operating status of the product and the faults that appear have local display and remote feedback functions, such as: high or low air pressure failure, low liquid level, oil supply failure, etc. The above points are the guarantee to ensure the stable and reliable operation of the electric spindle. Therefore, it is necessary to carefully select suitable products when selecting oil-air lubrication. <br />

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