In fact, when the manufacture of high-strength bolts is very not easy, need to go through a lot of complicated processes can be manufactured, and each process has its strict operating standards, if there is a problem in any link then it will have a serious impact on the next process. Take a very real example, that is, when you eat, accidentally put too much salt, and finally affect your personal appetite in the restaurant, which is the impact of this put the brand.
Therefore, when making high-strength bolts, it is divided into many processes, which are cold drawing - nodular annealing - mechanical phosphorus removal - pickling - cold drawing - cold forging forming - thread processing - heat treatment and finally to the inspection. Each step of the high-strength bolt is very important and indispensable, take the cold forging forming process, for example, under normal circumstances, the forming of the head of the high-strength bolt is processed by cold heading plasticity, and there are very few cases that are processed by cutting method. However, compared with cutting, the metal fiber, that is, the metal wire, will be continuously distributed along the shape of the product, and there is no cut between them, so the strength of the high-strength bolt is improved, especially the mechanical properties of the high-strength bolt are obviously prominent.
In the cold heading forming process of high strength bolts, the cutting process and forming are summarized, which are also divided into single click and double click cold heading and multi-station automatic cold heading. A single automatic cold header can carry out multi-station processes such as stamping and block forging, extrusion and reducing in several forming dies respectively. Sometimes a simplex is used. Whether it is multi-station or single-station automatic cold header, the processing characteristics of the original embryo are determined by the size of the rod material with a length of five to six meters or the size of the wire wire with a weight of nineteen hundred to two thousand kilograms. That is to say, the cold forging forming process of high-strength bolts is characterized by the fact that the cold heading forming is not made of pre-cut single hair embryo, but is cut and upset by using the oil bar material and wire wire of the automatic cold heading machine itself, and the hair embryo should be used under certain circumstances. The above is the process of high-strength bolts formed when forging summarized by Xiaobian for everyone, regardless of the fact that they are trained by such a complicated process, but we must ensure that each process is implemented by strict specifications and standards, only in this way, there will be no daydreaming in the forging process, so that each process is strictly docking.
