Differences about high-precision CNC shears and ordinary CNC shears?

What are the differences between high-precision CNC shears and ordinary shears? The main ones are as follows:

High precision CNC shearing machine

1. High-precision manufacturing quality

In order to stably process the surface of high-precision parts, the manufacturing of tools (including tool parts) has put forward stricter requirements than ordinary tools in terms of accuracy, surface roughness, and shape tolerances, especially indexable tools, in order to ensure The repetitive accuracy of the size of the blade tip (cutting edge) after indexing, the size and accuracy of key parts such as the tool body slot and positioning parts, and the surface roughness must be strictly guaranteed. At the same time, it is convenient for the tool to be set in the tool setting instrument. And size measurement, the machining accuracy of the base surface should also be guaranteed.

2. Optimization of tool structure

Advanced tool structure can greatly improve cutting efficiency. For example, high-speed steel CNC milling tools have adopted wave-shaped blades and large helix angle structures in structure, and cemented carbide indexable tools have adopted internal cooling, vertical blade mounting, and modular Replaceable and adjustable structure, such as internal cooling structure, is not applicable to ordinary machine tools.

3, the wide application of high-quality tool materials

In order to prolong the service life of the tool and increase the strength of the tool, the body material of many CNC tools is made of high-strength alloy steel, and heat treatment (such as surface treatment such as nitriding), so that it can be suitable for large cutting consumption, and the tool life is also Can be significantly improved (ordinary tools generally use quenched and tempered medium carbon steel). In terms of cutting edge materials, CNC cutting tools use a variety of new grades of cemented carbide (fine particles or ultrafine particles) and superhard tool materials.

4. Reasonable selection of chipbreaker

The cutting tools used on CNC machine tools have strict requirements for chip breakers. During processing, the cutting tool will not work normally (some CNC machine tools, cutting is carried out in a closed state), so regardless of CNC turning, milling, drilling or boring machines, the blades are optimized for different processing materials and procedures. The chip groove type enables stable chip breaking during cutting.

5. Surface coating treatment

Anhui Yongya believes that the emergence and development of surface coating technology is mainly due to the emergence and development of CNC tools. Because the coating can significantly increase the hardness of the tool, reduce friction, improve cutting efficiency and service life, coating technology is used in more than 80% of all kinds of cemented carbide indexable CNC tools.

The characteristics of alloy tool materials for hydraulic shears:

1. Hardness The hardness of cemented carbide is much higher than that of high-speed steel materials because it contains a large amount of hard carbides. The higher the hardness of cemented carbide, the better the wear resistance.

2. Anti-adhesive cemented carbide has a higher bonding temperature than high-speed steel, so it has a higher resistance to adhesion and abrasion.

3. Thermal physical properties The thermal conductivity of cemented carbide is higher than that of high-speed steel, which is about 2~3. Because the heat of TiC is lower than that of alloy, the thermal conductivity of TiC-containing alloy is also worse.

4. Toughness The toughness of cemented carbide is much lower than that of high-speed steel. It is not suitable to be used under strong impact and vibration, especially in low-speed cutting. The phenomenon of bonding and chipping is more serious.