Search This Blog

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

Heat treatment process of plastic mold parts

Different types of steel are used as plastic molds, and their chemical composition and mechanical properties are different, so plastic cnc machining routes are different; similarly, different types of plastic mold steels use different heat treatment processes. This section mainly introduces the manufacturing process route and the characteristics of the heat treatment process of the plastic mold.

1. Explanation of heat treatment terms

1. Annealing
(1) Concept: The heat treatment process of heating steel to an appropriate temperature, keeping it for a certain period of time, and then slowly cooling (usually cooling with the furnace).
(2) Purpose:
a. Increase the hardness of low steel to increase its plasticity (to facilitate cutting);
b. Refine the grains, and even the structure and composition of the steel;
c. Eliminate residual internal stress in cnc laser plastic cutting steel to prevent deformation and cracking
(3) Classification: complete annealing; spheroidizing annealing; stress relief annealing
2. Normalizing
(1) Concept: The process method of heating steel to 30~500C above Ac3 or ACcm, holding it for an appropriate time, and cooling it in air.
(2) Purpose: It is basically the same as the purpose of annealing, but the normalizing cooling rate is slightly faster than annealing, so the pearlite structure obtained after normalizing is relatively fine, and the strength and hardness are higher than that of annealed steel.
Normalizing has a shorter production cycle than annealing and has low cost and easy operation. Therefore, normalizing is preferred under possible conditions, but annealing should be used for complex parts.
3. Quenching
(1) Concept: The heat treatment process of heating steel to a certain temperature above Ac3 or Ac1, holding it for a certain period of time, and then cooling at an appropriate speed to obtain martensite or bainite structure.
(2) Purpose: In order to obtain martensite, improve the strength and hardness of steel.
4. Tempering
(1) Concept: a heat treatment process in which the quenched steel is heated to a temperature below the Ac1 point, held for a certain period of time, and then cooled to room temperature.
(2) Purpose:
a. Eliminate internal stress;
b. Obtain the required mechanical properties (improve the toughness of the steel, appropriately adjust the strength and hardness of the steel);
c. Stable organization and size

2. Process route of cnc plastic moulding

1. Low-carbon steel and low-carbon alloy steel molds
For example, the process route of 20, 20Cr, 20CrMnTi and other steels is: blanking→forging die blank→annealing→mechanical rough machining→cold extrusion forming→recrystallization annealing→mechanical finishing→carburizing→quenching, tempering→grinding and polishing →Assemble.
2. High-alloy carburized steel mold
For example, the process route of 12CrNi3A and 12CrNi4A steel is: blanking→forging die blank→normalizing and high temperature tempering→mechanical rough machining→high temperature tempering→finishing→carburizing→quenching and tempering→grinding and polishing→assembly.
3. Quenched and tempered steel mold
For example, the process route of 45, 40Cr and other steels is: blanking→forging die blanks→annealing→mechanical rough machining→tempering and tempering→mechanical finishing→dressing, polishing→assembly.
4. Carbon tool steel and alloy tool steel molds
For example, the process route of T7A~T10A, CrWMn, 9SiCr and other steels is: blanking → forging into die blank → spheroidizing annealing → mechanical rough machining → stress relief annealing → mechanical semi-finishing → fine cnc machined parts → quenching, tempering → Grinding and polishing → assembly.
5. Pre-hardened steel mold
For example, 5NiSiCa, 3Cr2Mo (P20) and other steels. For those directly processed with bar stocks, they have been pre-hardened due to the supply status, and can be directly processed and formed, then polished and assembled. For those that need to be forged into blanks and then processed into forming, the process route is: blanking→forging→spheroidizing annealing→planing or milling six sides→pre-hardening treatment (34~42HRC)→mechanical roughing→stress relief annealing→ Mechanical finishing → polishing → assembly.

Contact Us


Get In Touch or Get A Quote

Need an expert? you are more than welcomed to
leave your contact info and we will be in touch shortly
YOUR COMPANY
Sifangyuan Industrial Park, Xinshapu, Huaide Community
Humen town, Dongguan City, Guangdong Province. 
860769-82886112
860769-82886112