What is the tolerance range of precision screws?
What is the tolerance range of precision screws?
The main technical problem to be solved by Guangdong Yueluo Hardware Industry Co., Ltd. is to provide a rivet that can choose the breaking point, which can not only solve the bad effect caused by random shearing, but also can keep the mandrel in the hole to increase the strength after riveting, and also When the same type of rivet is riveted with different riveting thickness, changing the mandrel breakpoint can always make the mandrel breakpoint break at the required place, improve the tensile and shear strength of the rivet, increase the riveting quality of the product, and prolong the service life of the rivet.
The material of the round head three combination screw is divided into iron and stainless steel. The iron ones are made of different iron screw wires. Generally, the wire of the combination screw is 1010, 1018, 10B21 and so on. 10B21 is used to make 8.8 grade combination screws. Like 8.8-grade socket head cap screws, 10B21 wires are often used to make them. When done, go to heat treatment. After heat treatment, remove hydrogen and electroplating. This is to prevent the spring washer of the socket head cap screw from breaking. Stainless steel combination screws, in the combination screw market, generally refer to stainless steel SUS304 combination screws. 201 combination screws generally do very little. Few manufacturers of round head three combination screws produce 201 combination screws. Because the hardness of the screw wire of stainless steel 201 is not well controlled, it is easy to produce cracks. Introduction to the basic knowledge of electroplating round head combination screw electroplating generally refers to the de-plating of iron combination screws. Electroplating is divided into environmental protection and non-environmental protection. Commonly used combination screw electroplating colors include green color zinc, green blue zinc, green white zinc, green nickel, red color, white zinc, white nickel, etc. Cross recessed combination screws, hexagon combination bolts and self-tapping combination screws are used in the same way as the corresponding cross recessed screws, hexagon head bolts and self-tapping screws. The main feature of these combination screws is that they are equipped with corresponding washers, which are very convenient to use.
The anchor bolts of some metallurgical industrial equipment are detachable, that is, the anchor bolts are not directly anchored in the foundation concrete, but anchored in the T-bolt sleeve (T-bolt sleeve hereinafter referred to as sleeve) , The sleeve is constructed together with the foundation and anchored directly in the foundation. The T-bolt is inserted into the sleeve when the equipment is installed, and the T-bolt can be removed from the sleeve when the equipment is replaced.
There are two ways to form the external knurling of the embedded copper nut. One is to use copper raw material to draw the knurl and then to produce it on the upper equipment. Generally, the pattern of this method is straight, and the other is to use The round copper material is directly embossed while tapping during the production process. This processing method can produce some non-standard size knurled copper nuts. The embossed shape of the embedded copper nut can be selected by the user, such as mesh, Character embossing, herringbone embossing and other knurling patterns. Aliases and usage
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