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Cemented carbide is still the first choice of tool materials


Release time:

2016-05-17

Cemented carbide is still the first choice of tool materials

 

Compared with the traditional processing methods, the requirements of CNC machining on the tool, especially in the rigidity and durability are more stringent. According to the processing capacity of the machine tool, the performance of the workpiece material, the processing process, the amount of cutting and other related factors, the correct selection of tools and shanks. The general principle of tool selection is: not only requires high precision, high strength, good rigidity, high durability, but also requires dimensional stability, easy installation and adjustment. Rui Zheng Precision Tools Co., Ltd. reminds buyers to choose a shorter handle as far as possible to improve the rigidity of the tool on the premise of meeting the processing requirements.

Cemented carbide is still the first choice of cutting tool materials currently used in metal cutting tool materials are mainly five categories: high-speed steel, cemented carbide, ceramics, cubic boron nitride, polycrystalline diamond.

1. According to the requirements of CNC machining tools, the general principle of selecting tool materials is to choose carbide tools as much as possible. As long as the processing conditions allow the selection of carbide tools, do not use high-speed steel tools.

2. Ceramic cutting tools are not only used for processing various cast iron and different steel materials, but also for processing non-ferrous and non-metallic materials. The use of ceramic blades, no matter what the situation to use a negative rake angle, in order not to collapse the knife, if necessary, the cutting edge can be blunt. Ceramic tools in the following cases the use of poor effect; Short parts processing; Impact of large intermittent cutting and heavy cutting; Beryllium, magnesium, aluminum and titanium and other elemental materials and their alloys processing (easy to produce affinity, leading to cutting edge peeling and chipping).

3. Diamond and cubic boron nitride are both superhard tool materials. They can be used to process workpiece materials of any hardness. They have high cutting performance, high machining accuracy, and low surface roughness. Generally available cutting fluid.

Polycrystalline diamond inserts are generally cited for machining non-ferrous and non-metallic materials.

Cubic boron nitride blades are generally suitable for processing chilled cast iron, alloy structural steel, tool steel, high-speed steel, bearing steel with hardness greater than 450HBS, and nickel-based alloys, cobalt-based alloys and high-cobalt powder metallurgy parts with hardness not less than 350HBS.

4. From the structure of the tool application, CNC machining should be as far as possible the use of insert type machine clamp indexable insert to reduce tool wear after the replacement and pre-adjustment time.

5. Coated tools are selected to improve wear resistance and durability.