As a customer-oriented service provider of tightening plan for industrial products, the requirements of consumers are always a problem of great concern. In the past, some customers said that the tensile strength of bolts was unstable, and they wanted us to deal with this problem for them. In fact, this is not a problem. If we grasp the following aspects, the problem can be solved

As we all know, all bolts are especially in the effective dimensional tolerance category. Therefore, the dimension tolerance and natural property of countersunk head double drum core pulling rivets are different. The thickness of bolt and the thickness of cap are the two key factors that harm the tensile strength. Generally speaking, the thicker the bolt thickness and the thicker the cap thickness, the greater the tensile resistance. In order to stabilize the tensile resistance, it is necessary to manipulate the size tolerance range of these two specifications. The smaller the size tolerance, the more stable the tensile resistance. Naturally, many professionals may not be clear about it. There is another key factor that will harm the tensile strength of bolts, that is, the residual oil stains on the bolts. When the bolt is manufactured from the equipment, the upper edge is full of oil stains. At this time, it is still a semi-finished product processing, which can not be used for application. To carry out relative cleaning, it can be used as cleaning goods. If it is not cleaned up and tidy, there will be residual oil stains on the upper edge of the three tension rivets. The more residual oil stains are, the smaller the tensile resistance of bolts is. Therefore, if the inspection is completed There is no problem with the standard tolerance of the bolt. If the tensile strength is not stable, it will not be cleaned up. Therefore, it is not a problem that the tensile strength of the bolt is unstable!