Bolt, High strength bolts, Screw
The gradual transformation from low-carbon hexagonal nuts to the production of carbon steel 2H nuts, further optimizing the product structure, is the current strategic shift for many fastener enterprises, which will enable them to obtain more profit space. In order to improve the quality and preparation of the nut production process, there are higher requirements. In the face of this structural adjustment, it is necessary to develop quality management plans and inspection standards from the following aspects.
It involves three main aspects: first, mold preparation; Secondly, testing methods; Thirdly, the control of the production process has also put forward higher requirements for the three departments.
First, let's take a look at mold preparation: from order confirmation to mold design and then to manufacturing, we need complete mold equipment that can provide sufficient ammunition for the previous production, rather than just delaying the previous production due to the mold
Secondly, inspection methods: In this process, we should pay attention to the inspection tools and methods. The most basic testing tools we know include vernier calipers, micrometers, thread gauges, Rockwell hardness machines, tensile testing machines, etc. Most enterprises have always adopted on-site cyclic inspection and sampling inspection methods.
Finally, the control of the production process includes appearance, marking, formal dimensions, thread stop loss, and mechanical properties. To ensure the use of nuts, we mainly control the first three items, and the appearance and marking can be completed through visual testing. In order to control the accuracy of internal threads, it is necessary to develop a plug gauge with a smooth inner diameter of the nut, so that inspectors and operators can easily inspect the standard nut; Others rely on the manufacturing accuracy of forming molds and the debugging of various sequence pressures during the production process; The requirements for mechanical properties depend on raw materials and heat treatment
