The main reason for the radial runout during tool machining is that the radial runout is aggravated by the radial cutting force. Therefore, reducing the radial cutting force is an important principle to reduce the radial runout. The following methods can be used to reduce radial runout: choose a larger tool rake angle to make the tool sharper to reduce cutting force and vibration. A larger tool clearance angle is selected to reduce the friction between the tool main flank and the elastic recovery layer of the workpiece transition surface, thereby reducing vibration. However, the rake angle and relief angle of the tool cannot be selected too large, otherwise the strength and heat dissipation area of the tool will be insufficient. It can be smaller in rough machining, but in finishing machining, in order to reduce the radial runout of the tool Considering that, it should be made larger to make the knife sharper.
Increasing the diameter of the tool shank Under the same radial cutting force, the diameter of the tool shank is increased by 20%, and the radial runout of the tool can be reduced by 50%. Reduce the extension length of the tool. The longer the extension length of the tool, the greater the deformation of the tool during processing. During the continuous change of processing, the radial runout of the tool will continue to change, resulting in uneven machining of the workpiece surface. Smooth Similarly, the tool extension length is reduced by 20%, and the radial runout of the tool is also reduced by 50%.
If the cutting amount is too small, there will be a phenomenon of machining slippage, which will lead to the constant change of the radial runout of the tool during processing, making the machined surface not smooth. When the cutting amount is too large, the cutting force will increase accordingly. This will lead to large deformation of the tool, increase the radial runout of the tool during processing, and will also make the processed surface unsmooth.
Due to the change of the clearance position between the lead screw and the nut during down milling, the feed of the worktable will be uneven, resulting in shock and vibration, which will affect the life of the machine tool and the tool and the surface roughness of the workpiece.
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. The company 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, flat wood bit 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.
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What is the reason for the radial runout of the tool during machining
Posted by Admin | 15 Jun
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