Linear speed has a great influence on tool life. If the linear speed is higher than 20% of the specified linear speed of the sample, the tool life will be reduced to 1/2 of the original; if it is increased to 50%, the tool life will be only 1/5 of the original. To improve the service life of the tool, it is necessary to know the material and state of each workpiece to be processed, as well as the range of the linear speed of the selected tool. The linear speed of the tool is different, and it can be adjusted according to the specific situation during processing to achieve an ideal effect. The data of the line speed during roughing and finishing are not consistent. The rough machining is mainly to remove the allowance, and the line speed is low; the finishing is mainly to ensure the dimensional accuracy and roughness, and the line speed is high.

The effect of depth of cut on tool life is not as large as that of linear speed. Each geometry has a relatively large depth of cut range. During rough machining, the depth of cut should be increased as much as possible to ensure a large margin removal rate; during finishing, the depth of cut should be as small as possible to ensure the dimensional accuracy and surface quality of the workpiece. However, the depth of cut cannot exceed the cutting range of the geometry. If the depth of cut is too large, the tool cannot withstand the cutting force, resulting in tool chipping; if the depth of cut is too small, the tool will only scrape and squeeze on the surface of the workpiece, resulting in serious wear on the flank, thereby reducing tool life.

There are many reasons for vibration, including machine rigidity, tooling rigidity, workpiece rigidity, cutting parameters, tool geometry, tool nose radius, blade clearance angle, tool bar overhang, etc., but the main reason is that the system is not rigid enough to resist The cutting force during machining causes the constant vibration of the tool on the surface of the workpiece during machining. To eliminate or reduce vibration must be considered comprehensively. The tool life is greatly reduced.

When processing workpieces, we mainly consider the workpiece material, heat treatment requirements, and whether intermittent processing is required. The inserts for machining steel, the inserts for machining cast iron, and the inserts for machining hardness HB215 and HRC62 are not necessarily the same; the inserts for interrupted machining and continuous machining are not the same. Steel blades are used for processing steel parts, casting blades are used for processing castings, CBN blades are used for processing hardened steel, and so on. For the same workpiece material, if it is continuous processing, a higher hardness blade is used, which can increase the cutting speed of the workpiece, reduce the wear of the tool tip, and reduce the processing time; if it is intermittent processing, use a blade with better toughness. It can effectively reduce abnormal wear such as chipping and improve the service life of the tool.

During the use of the tool, a large amount of heat will be generated, which will greatly increase the temperature of the blade. When it is not processed or cooled with cooling water, the temperature of the blade will be reduced. Therefore, the blade has always been in a high temperature range, so that the The blade constantly expands and contracts, causing tiny cracks in the blade. As the use of the blade increases, cracks can propagate to other blades, resulting in a reduction in the life of the other blades.

Ningbo Tiangong Great Star Tools Co.,Ltd since 1971,enjoys great prestige in the professional manufacture hand tools company of the circle and now is the important production foundation for hand tools.Ningbo Tiangong Great Star Tools Co.,Ltd has developed from needle file and hundred RMB net capital into a corporation with 280 employees and more than 0.1 billion RMB net assets.Ningbo Tiangong Great Star Tools Co.,Ltd since 1958. The registering capital is about 4.15 million RMB. steel file manufacturers covers 30 thousand square meters, building area covers 23 thousand square meters. Company has more than 280 employees and sales amount was 20 million USD in last year. Its main products include hand tools, wood chisel, wood plane, flat wood bit,cold chisel,SDS&masonry drill bit, file&rasp etc. Company passed ISO9001 and BSCI quality management system, and GS, TUV, FSC product quality certification. Ningbo Tiangong Great Star Tools Co.,Ltd is also the permanent members in Ningbo National Hardware Association.Company main products include: wood chisel, wood plane, flat wood bit,cold chisel,drill bit, file&rasp etc.