If you want to be engaged in precision parts processing, you must understand the difference between non-standard parts and standard parts
The objects of precision parts processing are roughly divided into two types: one is standard parts processing, and the other is non-standard parts processing. Relatively speaking, non-standard parts are more difficult to process than standard parts.
Many newcomers who have just entered the industry cannot distinguish between standard parts and non-standard parts. Next, let NJPE precision senior engineers explain the difference between non-standard parts and standard parts: standard parts are divided into generalized standard parts and narrow standard parts. Generalized standard parts are mechanical zero (Department)Pieces and components ,(The main standards for use are Chinese national standards (GB)American Society of Mechanical Engineers standard (ANSI/ASME)Wait, other Japan (JIS), Germany (DIN)Such standards are also widely used in the world.
Mechanical parts and components with high standardization and strong industry versatility are also called universal parts.
Generalized standard parts include fasteners, connecting parts, transmission parts, seals, hydraulic components, pneumatic components, bearings, springs, etc. , all of which have corresponding national standards and are versatile across industries.
Such as transmission parts, seals, hydraulic components, pneumatic components, bearings, springs and other mechanical parts. Screws, bearings, pneumatic components-
NJPE precision, narrow standard parts are standardized fasteners, which are actually connecting parts (Connector)
One kind of, but because of the wide variety of applications, so the actual use of a single class, even referred to as standard parts.
For example: screws, washers, rivets, welding nails and other parts.
The processing of non-standard precision parts is due to the fact that the state has not set relevant standard specifications, nor has relevant parameter regulations, and other accessories are freely controlled and processed by enterprises.
There are many varieties of non-standard parts, and there is no standard classification at present.
The general classification is as follows: Metal non-standard parts: drawings are provided by customers, and manufacturers use equipment to make corresponding products according to the drawings, usually most of which are molds, tolerance requirements and smoothness are specified by customers, there is no certain paradigm.
The product needs corresponding quality control from casting to finishing. The process is complicated and changeable, and the general cost is higher than that of standard parts. Non-standard parts-
NJPE precision non-metallic non-standard parts: it is the processing of some non-metallic materials.
Such as plastic, wood, stone, etc. In recent years, the development of injection molding industry and plastic molds has become increasingly sophisticated, with the introduction of curved surface design and programming numerical control, the cost and tolerance level of non-standard precision parts have been greatly improved. Standard parts-
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