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How to use the PCBN tool correctly

2018-03-16 12:11:52 TKD CO., LTD Reading 32 Times

How to choose the PCD cutting tool in machining. how to correct selection of cutting parameter, cutting tool geometry parameter and other processing conditions, the PCBN is an effective and long tool life, can create high economic benefit, but if use improperly, can cause a lot of waste. Therefore, correct use of PCBN tools is an important factor to reduce the company's product processing costs.

Correct selection of diamond grinding wheel to recover PCBN cutting tool is also a main factor to be reckoned with, select the appropriate particle size, the hardness of diamond grinding wheel can effectively improve the life of the PCBN cutting tool, reducing wear and tear in the process of recuperation and collapse edge.

1. Reasonable selection of cutting amount: the cutting speed should be selected according to the processed materials, generally much higher than the carbide tool. Cutting hardened steel hardness HRC55 ~ 65 optional cutting speed is 80 ~ 120 m/Min, because PCBN cutting material is the cutting zone metal softening of the small area, so the cutting speed is too low, can't play the cutting performance of PCBN tools.Generally, the quantity of feed should not be greater than 0.2mm/R, and the amount of back-draft knife

2, choose reasonable tool geometric parameters: because of PCBN cutting tool toughness higher than that of ceramic, below the carbide, so the selection of geometric parameters of cutter blade intensity, main consideration is to ensure that the cutting tool rake Angle generally choose (0 ° ~ 10 °), choose smaller Angle, after about 10 °.In addition to the special requirements, in order to ensure the blade intensity, knife Angle generally not less than 90 °;Blade to grind out negative chamfer, generally take 0.2 mm x (15 ° to 30 °), with 30 ~ 50 times a magnifying glass before use inspection on cutting tools, ensure no collapse edge blade.

3, cooling and lubrication: for cutting tools, other materials by cooling lubricants to improve machining surface and prolong the life of cutter, but of PCBN cutting tool in addition to the special circumstances, without coolant also may achieve the ideal processing quality and longer tool life, is soft not hard for PCBN cutting tools.If use coolant, cannot use water soluble cooling fluid, because CBN easy hydrolysis in 1000 , due to severe wear.

4. Process system of machine tool: since PCBN tools are mostly used for cutting hard materials such as hardened steel and wear-resistant cast iron, and the tool has negative chamfering edge, the radial force is large.This requires good rigidity and precision of the machine tool, small vibration of the system, small cantilever when the tool is installed, and PCBN tool should not be used for surface cutting.

At present, although the PCBN cutting tool material price relative to the price of tungsten carbide and ceramic cutting tool was on the high side, but who share to each artifact on the tool cost is lower than other materials, the use of advanced machining technology, if the grinding machine tools and other equipment investment stand into the production costs, the use of PCBN cutting tool will bring greater economic benefits.For general small and medium-sized enterprises, finishing process is always the bottleneck of the manufacturing process of grinding, lathe, if purchase good performance using PCBN cutting tool, the application of advanced machining technology, such as car generation grinding can save equipment investment, increase productivity, but also greatly increase the flexible of machining process.In addition, at present due to the increase of personnel expenses and the requirements of environmental protection, vigorously promote the use of PCBN cutting tool, give full play to its potential effectiveness, improve the level of machining technology is also has important significance.

 

 


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