1. make preparations before the output
2.carry out random inspection in the output
3.The final inspection is carried out after the output.
First of all, the preparation before production includes: related personnel, equipment status, mold equipment, production process, raw materials, etc.
However, three major aspects are derived from the first item:
a. mold preparation;
From order to mold planning to production, perfect mold equipment is required. It can be considered that the production ahead will provide satisfactory preparation, and production will not be delayed due to molds. This requires sufficient inventory to ensure that this cycle is about 20~25 days.
b. inspection method;
In this link, attention should be paid to the inspection of tools and methods. The most basic inspection tools include vernier calipers, micrometers, thread gauges, Rockwell hardness machines, tensile testing machines, etc. Most enterprises generally use It is the method of on-site follow-up inspection and sampling inspection.
c. control of the production process.
Including appearance, method specifications, thread opening and closing, and mechanical properties. In order to ensure the quality of the
nut, the first three items are firstly controlled, and the appearance can be completed by visual inspection. In order to control the accuracy of the internal thread, it is necessary to prepare a lubricating plug gauge for the inner diameter. The inspector and the operator have one set each, so that the
nut that meets the specification can be easily checked.And the requirements for mechanical properties depend on raw materials and heat treatment to complete.
