Drawing The drawing process has two purposes. One is to change the size of the raw material; the other is to obtain basic mechanical properties of the fastener through deformation strengthening. For medium carbon steel and medium carbon alloy steel, there is another purpose, that is, to make wire ro... read more
1. Control accuracy This method adopts the method of mold making, that is, standardized operation specifications. First, based on the size of the bolt, the high precision of the mold is unified. Whether it is directly buried or after the method is buried, it has an integrated mold. Accuracy and stan... read more
When countersunk head screws and hexagon socket head bolts are produced by cold heading, the original structure of the steel will directly affect the forming ability during cold heading. In the process of cold heading, the plastic deformation of the local area can reach 60%-80%. For this reason, the... read more
Protection of threads 1. The anchor bolts that match the steel structure should pay attention to protecting the threads during transportation, packing, unpacking, and leaving the factory. The correct method of protection is to wrap the thread with oiled paper and hemp to prevent rust and damage. It ... read more
1 Materials and main equipment: 1.1 Bolts, nuts, washers should be accompanied by quality certificates, and should meet the design requirements and national standards. 1.2 High-strength bolts should be classified and stored according to specifications, and protected from rain and moisture. Do not us... read more
Yuyao Xintai Hardware Co., Ltd. was founded in 2005, which is a professional China construction anchor bolts manufacturers and concrete anchor bolts factory,our company engaged in various kinds of expansion bolt,high strength fasteners. We are near to Hang Zhou Bay, and cover 7000 square meters.
Read More >