What is precision mechanical processing?

Precision Machining is a type of mechanical processing that ensures workpieces meet the geometric tolerances specified in drawings. During this process, the workpiece’s performance and external structure undergo corresponding changes.

Mechanical part design, a core discipline for mechanical majors, is popular among science students. It requires solid science and engineering knowledge, drawing skills and spatial imagination. Driven by China’s industrial development, the demand for professionals in this field is growing, with an employment rate of 95% for mechanical majors.

With industrial progress, precision machining technology has stood out. Precision parts are widely used in home appliances, automotive, hardware, medical manufacturing and other industries, serving as either components or core parts of mechanical equipment.

There are two main processes for precision part manufacturing: hot working and cold working. Hot working achieves shape changes through heat treatment-induced chemical/physical changes at non-room temperatures. Cold working realizes shape modification at room temperature without chemical/physical changes, typically using cutting technology. In the future, precision machining will integrate with technology to become a sustainable scientific discipline under environmental and processing requirements.

Non-standard parts are widely used and in high demand in mechanical manufacturing. Specifications for parts in automated equipment, machining jigs and inspection gauges are usually customized by enterprises. Manufacturers produce these parts according to provided drawings to meet required geometric tolerances.

Non-standard parts are defined relative to standard parts—they lack national standardized structures, dimensions or parameters, and are customized by enterprises based on production needs. Thus, their machining cost is generally higher than standard parts.

Currently, non-standard parts are roughly classified by material: metal non-standard parts (e.g., brass, aluminum) with customer-specified tolerances and surface finish, involving complex processes; and non-metal non-standard parts made from plastics, wood, stone, etc.