According to the precision CNC machining company, machining is a process in which machining machinery is used to change the shape or performance of the workpiece. According to the temperature state of the workpiece to be processed, it is divided into cold processing and hot processing. Generally processing at room temperature, and does not cause chemical or phase changes of the workpiece, it is...
There will be some problems that affect accuracy in the processing of hardware parts. So what are the factors that affect the accuracy of machining? Let’s take a look at it together:
The original error of the process system: the geometric error of the process system, such as the machining principle error, the geometric accuracy of the machine tool, the manufacturing error of the tool and the fixture, the installation error of the workpiece, etc. The force deformation, thermal deformation, and internal stress of the process system will affect the accuracy of parts processing. Machining principle errors such as production approximate processing, forming processing, etc. As long as the processing principle errors are limited to allowable tolerances, productivity can often be greatly improved.
The error of the geometric accuracy of the machine tool for the processing of hardware parts is such as the radial and axial runout errors when the spindle rotates. The error of the straightness of the machine tool guide rail in the horizontal and vertical directions, the error of the parallelism between the guide rail and the guide rail. The error of the machine tool transmission chain.
The error of the tool error measurement in the processing of hardware parts, the thermal deformation error of the process system. Work piece, tool thermal deformation, cutting heat, friction heat, incidental heat, etc., so many precision machine tools are placed in the warm workshop, (slow wire machine, CNC machine tool, etc.). The deformation caused by the internal stress of the workpiece is cut. The residual stress in the workpiece causes the workpiece to deform.
Therefore, in order to reduce the machining accuracy caused by the original error, we usually think of the machine tool for self-turning, self-milling, self-grinding, and self-cutting to try to recover the machining error caused by the original error. For example, using an old milling machine to process the parallelism, perpendicularity, and flatness of each surface of an aluminum alloy product with an appearance of 200*20*400, within 0.03, or use a lathe with low precision to process a slender shaft, or use The old wire-cutting machine tools process sets of parts with inner and outer circle coaxiality within 0.02, etc. When we think that the machining accuracy is uncontrollable, we have to think of adopting self-carving, self-milling, self-grinding, Self-cut these methods to relieve.