What type of tool should be used to process stainless steel parts and what are the basic requirements? The tool model is generally YW, YT is for processing steel parts, and YG is for processing casting parts.
1. The requirements for geometric parameters of tools when processing stainless steel parts generally need to be considered when selecting the rake angle and draft angle. When selecting the cutting angle, factors such as chip rolling geometry, the presence or absence of chamfers and the positive and negative angles of the edge tilt angle should be considered . Regardless of the tool type, a larger rake angle should be used when machining stainless steel. The draft angle should not be too small, but it should not be too large either. If the clearance angle is too large, the tool corner angle will be reduced, the cutting edge strength will be reduced, and the tool wear will be reduced. the tool will be accelerated. Generally, the draft angle should be suitably larger than when processing ordinary carbon steel.
2. Requirements for the surface roughness of the cutting part of the tool when processing stainless steel parts. Improving the surface smoothness of the cutting part of the tool can reduce the resistance when the chips bend and improve the durability of the tool. Compared with processing ordinary carbon steel, when processing stainless steel, the cutting amount should be reduced appropriately to slow down tool wear at the same time, appropriate cooling lubricant should be selected to reduce the cutting heat and cutting force during the cutting process and extend the cutting time. tool life.
3. Tool holder material requirements when processing stainless steel parts. The tool holder must have sufficient strength and rigidity to avoid vibration and deformation during the cutting process. This requires selecting a sufficiently large cross section of the tool holder and using stronger materials to make the tool holder, such as quenched and tempered #45 steel or #50 steel.
4. Requirements for the material of the cutting part of the tool when processing stainless steel parts. When processing stainless steel, the material of the cutting part of the tool must have high wear resistance and maintain its cutting performance at higher temperatures. Currently commonly used materials are: high speed steel and cemented carbide.
5. Since high-speed steel can only maintain its cutting performance below 600°C, it is not suitable for high-speed cutting, but only for low-speed stainless steel processing. Since carbide has better heat and wear resistance than high speed steel, carbide tools are more suitable for cutting stainless steel.
To improve the surface quality of stainless steel parts, carbide tools should be used for processing. The cutting amount is slightly less than that of turning ordinary carbon steel parts. In particular, the cutting speed should not be too high. speed Vc=60~80 m/min. The cutting depth is ap=4~7mm and the feed speed f=0.15~0.6mm/r is appropriate.
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