Stainless steel processing cutting tool selection

stainless steel machining requirement for cutting tool geometry parameter:

Cutting of the stainless steel machining, tool geometry, the general should be used after Angle, Angle of options to consider.When choosing anterior horn, want to consider volume crumbs slot type, presence of chamfering and blade Angle of dip Angle of the positive and negative factors such as the size.No matter what kind of cutting tools, when stainless steel machining must be used larger rake Angle.Increase cutting tool rake Angle can reduce the chip cutting off and clear the process encountered resistance.To the Angle of choice is not very strict, but shoulds not be too small, after serious friction Angle is too small easy and workpiece surface, worsen processing surface roughness, speed up the tool wear.And because the strong friction, enhance the stainless steel surface work hardening effect;After cutting tool Angle also shoulds not be too big, after the Angle is too large, reduce tool wedge Angle, reduce the strength of a cutting edge, accelerated the tool wear.Usually, after the Angle to be appropriate larger than ordinary carbon steel processing.

Part of tool cutting surface roughness requirement:

Increasing tool cutting part of the surface finish can reduce friction, the chip formation curl tool durability.Compared with the processing of ordinary carbon steel, stainless steel processing cutting dosage should be reduced to slow the tool wear;While selecting the appropriate cooling lubricants, in order to reduce the cutting heat and cutting force in the cutting process, extend the service life of cutting tools.

The requirements of tool rod material:

when stainless steel machining, because of the cutting force is bigger, so the tool holder must have sufficient strength and rigidity, so as not to happen in the process of cutting chatter and deformation.This requires appropriate large cross-section of tool holder, at the same time should also be made of high strength material to make tool rod, such as conditioning treatment using 45 # steel or steel no. 50.

Requirements for tool cutting part of the material:

Requires cutting tools when stainless steel machining cutting part of the material has high wear resistance, and can at high temperature to keep its cutting performance.Now commonly used materials are: high speed steel and carbide.Due to the high speed steel can only be below 600 ° C to keep its cutting performance and therefore should not be used for high speed cutting, and is only applicable to stainless steel under the condition of low speed processing.Because the cemented carbide than high speed steel has better heat resistance and abrasion resistance, therefore made of hard alloy cutting tools is more suitable for the machining of stainless steel.

Carbide tungsten cobalt alloy (YG) and tungsten cobalt titanium alloy (YT) two kinds big.Tungsten cobalt alloys have good toughness, made of cutting tools can be used in a larger rake Angle and grinding out relatively sharp blade, in the process of cutting chip easy deformation, cutting a brisk, chip is not easy to stick a knife, so in general, use tungsten cobalt alloy processing stainless steel is more appropriate.Especially in the larger roughing and intermittent vibration machining cases more tungsten cobalt alloy blade should be adopted, it is not like cobalt tungsten titanium alloy hard brittle, not grinding, easy to collapse edge.Cobalt tungsten titanium alloy has good red hardness, under the condition of high temperature than tungsten cobalt alloy wear-resistant, but its brittleness, resistance to shock, vibration, generally stainless steel precision automotive tools.