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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

What are the reasons for the failure of metal parts?

The basic forms of failure of metal parts. Generally, the failure forms of mechanical parts are classified according to the external morphological characteristics of the failed parts, which generally include: wear failure, fracture failure, corrosion failure and distortion failure. In production practice, the most important failure mode is The wear failure of the working surface of the part, and the most dangerous form of failure is the instantaneous crack and fracture, collectively referred to as fracture failure.

​Basic forms of failure of metal cnc machining parts Generally, the failure modes of mechanical parts are classified according to the external morphological characteristics of the failed parts, which generally include: wear failure, fracture failure, corrosion failure and distortion failure. In production practice, the most important failure mode It is the wear failure of the working surface of the part, and the most dangerous form of failure is instantaneous cracks and fractures, collectively referred to as fracture failure.


1. Wear failure of parts

Friction and wear are a common phenomenon in nature. When parts or parts and other substances come into contact with each other and produce relative motion, it is called friction. The phenomenon of material loss on the friction surface of the part is called the wear of the china cnc machining part. Material wear includes two aspects: one is the damage of the material structure; the other is the change of size, shape and surface quality (roughness). If the wear of the parts exceeds a certain limit, it will lose its specified functions, causing the equipment to decline or fail to work. This situation is called wear failure. According to tribological theory, edm machining parts wear can be divided into abrasive wear, adhesive wear, fretting wear, erosion wear and corrosion wear according to their properties.

  • ① Abrasive wear: The phenomenon that the surface of parts and abrasives rub against each other, which causes the loss of surface material is called abrasive wear or abrasive wear. Abrasives also include hard asperities on the surface of the part. Among wear failures, abrasive wear failure is the most common and most harmful one.
  • ② Adhesive wear: Adhesive wear refers to the wear caused by two relatively sliding surfaces that are welded together locally, so that the material on one surface is transferred to the other surface.
  • ③Fatigue wear: When the two contact surfaces of the friction pair are relatively rolling or sliding, the periodic load will subject the contact area to a large alternating contact stress, causing fatigue cracks on the metal surface and continuous expansion, causing the surface material to fall off, causing points Corrosion and peeling, this phenomenon is called surface fatigue wear.
  • ④ Fretting wear: Fretting wear is the surface damage caused by relatively small vibration on two fixed contact surfaces, which mainly occurs on the joint surface of relatively static parts. The main hazard is to reduce the accuracy of the fit and loosen the tightly-fitted body. What is more serious is to cause stress concentration and cause fatigue fracture of the parts.
  • ⑤ Erosion wear: Erosion wear refers to the loss of the surface when the material is impacted by fixed particles, droplets or liquid bubbles.

2. Fracture failure of parts

The phenomenon of mechanical cnc manufacturing parts split into two or more pieces under the action of certain factors is called fracture. The new surface formed after the fracture of the part is called fracture.

  • ① Overload fracture: When the applied load exceeds the ultimate stress that its dangerous section can bear, the part will fracture. This kind of fracture is called overload fracture. Unreasonable strength design of parts, excessive stress on the structure, operation errors, overloaded operation of mechanical equipment, and excessive load on certain parts may lead to overload fracture.
  • ②Fatigue fracture: The fracture phenomenon of metal parts after a certain number of cyclic loads or alternating stresses is called fatigue fracture, also known as mechanical fatigue.
  • ③Brittle fracture: due to improper manufacturing process of metal parts, or corrosion by harmful media during use, or uncomfortable ambient temperature, the material may become brittle and the metal parts may suddenly fracture. Fractures of this nature are generally called brittle fractures, but also called environmental fractures.

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