We may have different understandings of precision machining. How to understand precision machining? How to define precision machining? What is the definition of precision machining?
Precision machining is defined as the process of finishing the machining of main surfaces according to steps and procedures, including workpiece parallelism, surface finish, surface perpendicularity, surface hardness, etc., so as to make the machining accuracy and surface quality of parts meet the requirements specified in the drawings.
Parallelism requirements
The so-called parallelism requirement is the requirement for the tolerance around the workpiece. For example, for a rectangular workpiece, the thickness of the four corners of the workpiece is required to reach a certain tolerance range. If the thickness of the four sides cannot meet the tolerance requirements, the parallelism requirements cannot be met. This requires readjusting the workpiece. The problem may occur in the grinding machine suction cup, which is worn due to excessive use, resulting in parallelism error; It may also be that the grinding wheel is not properly trimmed, or the grinding wheel is cracked or chipped, and the grinding wheel needs to be grinded again; Or it may be that the suction cups are not cleaned up, so it is necessary to clean the suction cups again and carefully; It may also be that the workpiece is not well trimmed and has burrs.
Verticality requirements
The so-called perpendicularity requirement is to require that the side and ground of the workpiece meet the tolerance requirements. It is understood that the proper body is divided into three sides of XYZ from the perspective of the number axis. Generally, XZ and YZ are required to meet the tolerance requirements. Errors also occur and the parallelism requirements are approximate. Generally, it can be handled according to the requirements of parallelism.
Other requirements
For example, finish. It is required to achieve, such as mirror effect.
