Non-standard parts processing, what is the non-standard parts processing industry? What are the classifications of non-standard parts processing in accordance with national standards?

Nowadays, in the metal industry, machinery and equipment are constantly expanding. Screws or nuts are needed. There are a lot of them in the past few years. In 2019, the production of such non-standard parts processing is even more numerous. This is The development trend in our market.

First of all, we know that non-standard parts are proposed relative to standard parts, so before we understand non-standard parts, we need to know what is called standard parts. Standard parts refer to the commonly used parts, such as threaded parts, rolling bearings, etc., that have been fully standardized in structure, size, drawing, marking and other aspects and produced by professional factories. The broad sense includes standardized fasteners, connectors, transmission parts, seals, hydraulic components, pneumatic components, bearings, springs and other mechanical parts. The narrow sense includes only standardized fasteners. Standard parts commonly known in China are the abbreviations for standard fasteners, which are a narrow concept, but the existence of a broad concept cannot be ruled out. In addition, there are industry standard parts, such as automobile standard parts, mold standard parts, etc., which also belong to broad standard parts.

Non-standard parts processing professionals explained that the country has not set strict standard specifications, and there are no other accessories that are freely controlled by enterprises except for relevant parameter regulations. There are many varieties of non-standard parts, and there is currently no standard classification. The general classification is as follows:

　　Metal non-standard parts: Drawings provided by customers, manufacturers use equipment to make corresponding products according to drawings, usually molds are mostly, tolerance requirements, and finish are all specified by customers, and there is no certain paradigm. Products from casting to finishing require corresponding quality control. The process is complicated and variable, and the cost is generally higher than that of standard parts.