When machining precision mechanical parts in a mechanical processing plant, the surface of metal machined parts should not have scratches or scratches. The errors mainly include spindle rotation error, guide rail error, and transmission chain error. Spindle rotation error refers to the variation of the spindle relative to its average rotation axis, which directly affects the accuracy of the workpiece. There are many requirements and regulations for processing technology to ensure the qualification rate of factory parts.

Remove the jaws, machine two M4 threaded holes, press two steel plates flat with a 1.5mm thick jaws, rivet 0.8mm thick hard copper plate 3 with aluminum countersunk rivets in the machining factory, and tighten the jaws with M4 countersunk screws 1 to form a durable soft jaws. This can also protect hardware components from being clamped and has interchangeability.

For the workpiece, clamp it first and then position it, as clamping will definitely check the deformation of the workpiece, so it is necessary to clamp it first and then position it. For the 6-point positioning, the machining factory is trying to limit its degree of freedom. When the handle of the hexagonal wrench is too short to concentrate, a pipe with an inner diameter slightly larger than the inner diameter of the wrench can be inserted from the milling groove as a long handle.

The main reasons for spindle rotation error include spindle coaxiality error, bearing error, inter bearing coaxiality error, spindle winding, etc. The guide rail is the reference for determining the relative position of machine tool components and is the reference for machine tool movement.

The manufacturing error, uneven wear and installation quality of the guide rails themselves in mechanical processing plants are important factors that lead to guide rail errors. Transmission chain error refers to the relative motion error between the transmission components at both ends of the transmission chain. It is caused by manufacturing and assembly errors of various components in the transmission chain, as well as wear and tear during use.

According to the experience of mechanical factories, tool wear is inevitable during the cutting process, leading to changes in the size and shape of the workpiece. The impact of geometric errors on machining errors in mechanical processing plants varies depending on the type of tool used: the manufacturing error of fixed length tools directly affects the machining accuracy of the workpiece, but its manufacturing error does not directly affect the machining error.

The function of fixtures is to make the workpiece equal to the correct position of the cutting tool and machine tool, so the geometric error of fixtures has a significant impact on machining errors (especially positional errors). The thermal deformation during the machining process in a mechanical processing plant has a significant impact on machining errors, especially in precision and large-scale machining, where the processing errors caused by thermal deformation sometimes account for 50% of the total error of the workpiece.