What are the reasons for errors in CNC machining parts

Durante el funcionamiento del mecanizado CNC , existe un cierto espacio entre el tornillo y la tuerca. A medida que aumenta el tiempo de funcionamiento del equipo, la brecha aumenta gradualmente debido al desgaste. Por tanto, la correspondiente compensación de holgura del movimiento inverso es el factor principal para superar los hombros generados en la superficie de mecanizado. La medición de la brecha generalmente utiliza el método de medición de comparador, que requiere control de errores. Sin embargo, debe tenerse en cuenta que la base del medidor y la varilla del medidor no deben extenderse demasiado alto o demasiado largo, porque durante el proceso de medición, debido al largo voladizo, la base del medidor se moverá por fuerza, lo que resultará en un recuento y compensación inexactos. valores. error.

Improper tool selection in CNC machining can also cause dimensional errors. During the cutting process, the tool removes material through the main cutting edge. However, after the arc passes through the quadrant and the arc is tangent to the second cutting edge of the tool, the second cutting edge may participate in cutting. Therefore, when selecting or grinding a tool, the wedge angle of the tool must be carefully considered.

During CNC machining, if the machining allowance is not uniform, an error may occur. In the process of achieving part design performance, whether the machining allowance of the CNC machining surface is even or not is also an important reason for whether the molding surface can meet the design requirements. Because the machining allowance is not uniform, it is easy to cause "remapping" errors. Therefore, for parts with high surface shape requirements, the manufacturing allowance should be as uniform as possible before forming, or multiple contours should be processed to meet the design requirements.

CNC machining has clear regulations on the workshop environment, and the heat source needs to be reduced: the focus is on the spindle bearing speed, clearance adjustment and reasonable preload. For thrust bearings and tapered roller bearings, due to their poor working conditions and high heat generation, thrust angular contact ball bearings can be used when necessary to minimize friction and heat generation of certain parts. CNC machining also requires heat insulation: keep the heat source away from the spindle, such as isolating the motor and transmission, using separate transmission, etc. CNC machining also needs heat dissipation: strengthen lubrication and cooling, and use oil cooling, air cooling and other methods to speed up heat dissipation. Reducing the influence of thermal deformation: No matter which method is adopted, it can only reduce thermal deformation, and it is difficult to completely eliminate thermal deformation. Therefore, measures should also be taken to reduce the effects of thermal deformation.

The above explanation is the reason for the error of CNC machining parts. I hope it will be helpful to you after reading. If you want to learn more about CNC machining parts, please contact customer service online or call our service hotline (Upper right corner of the website) For consultation, we will provide you with quality service wholeheartedly!