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How to prevent deformation during slow wire processing

 Slow-moving wire processing is a very exquisite and exquisite craft, and sufficient preparations need to be made, so that the processed products can be more quality. The slow-moving wire processing technology has a wide range of applications and is a must in our industries. If you want to do better with less technology, you must master all aspects of the processing knowledge. For example, the most common thing is the deformation during processing.  How can we solve it How to prevent deformation during slow wire processing Speaking of slow wire processing, it uses continuously moving fine metal wires as electrodes. Pulse spark discharge is performed on the workpiece, where it generates a high temperature above 6000 degrees. Moreover, if it wants to improve its quality problems and prevent its deformation, it can firstly start from the following aspects. 1. To prevent deformation, it is impossible for the material to have no internal stress. In particular, the internal stress of the que

KOVAR parts seal preparation and physical properties

Kovar® is a vacuum-melted iron-nickel-cobalt low-expansion alloy. The chemical composition content is controlled in a very narrow range to ensure accurate and balanced thermal expansion performance. At the same time, strict quality control during the manufacturing process of KOVAR machining parts also ensures balance Its physical and mechanical properties are more suitable for deep drawing, stamping and various cutting processes. Material use Kovar® is used for vacuum sealing of hard glass and ceramics, and is widely used in electron tubes, microwave tubes, transistors and diodes. On integrated circuits, it is used for flat integrated circuits and dual in-line packages. Seal preparation All parts made by Kovar® should be degassed and annealed in a wet hydrogen atmosphere. Hydrogen is injected into water at room temperature and gets wet through blisters. Care must be taken to prevent surface carbonization. The heat treatment furnace must have a cooling chamber that provides the same a

What are the rules for metal stamping die scrap tube?

The Purpose Standardize the management of the scrapping of the company's metal stamping dies, prevent the loss of company assets, and formulate this system specially. Scope of application It is suitable for the management of the company's scrap molds. Definition If the molds listed in the assets of the company fall under one of the following circumstances, the use management department may apply for scrapping. 1. Molds that exceed the specified service life. 2. The mold is severely damaged by accidents or accidents, and molds that cannot be repaired or have no repair value. 3. Metal stamping dies that have not reached the service life, but due to safety, quality, efficiency and other issues, the repair still fails to meet the minimum requirements of the customer's product process or affects the production safety and efficiency. 4. Product customers have stopped placing orders or have not placed orders for molds in several years. 4. Responsibilities 1. Responsibilities of th

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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