What is the tolerance range of precision screws?
What is the tolerance range of precision screws?
Nuts are used as fasteners, and most of them need to be used in conjunction with gaskets in the process of use to adjust the deficiencies of the material itself and strengthen the degree of tightening, while metal materials are used as raw materials for gaskets. The cost is also relatively high, and in the process of use, the end face of the metal gasket and the nut will also be affected by the process, resulting in the defect that the fastening effect is not firm and easy to loosen.
The development of a structure with simple production, reasonable structure and stable feeding is of great significance to the field of riveting automation. Technical realization elements: The purpose of this utility model is to overcome the deficiencies in the prior art, and to provide an automatic feeding device for pressure riveting nuts, which has a compact structure and a reasonable design, and can realize the automatic conveying of the pressure riveting nut on the pressure riveting die. Reduce the use of space, improve work efficiency and save labor costs. According to the technical scheme provided by the utility model: the automatic feeding device for riveting nuts, which is characterized in that: it includes an installation bracket, a connecting frame, a flap bracket, a material pushing cylinder, a material pushing block and a flap; the flap bracket is arranged on the installation Below the bracket and attached to the mounting bracket through the connecting bracket.
Bolts or screws and flat washers assemblies GB/T 9074.1-2002 Cross recessed head screws and external serrated lock washers assemblies GB 9074.2-88 Cross recessed pan head screws and spring washers assemblies GB 9074.3-88 Cross recessed pan head screws, springs Washer and flat washer assembly GB 9074.4-88 Cross recessed small pan head screw and flat washer assembly GB 9074.5-88 Cross recessed small pan head screw and large washer assembly GB 9074.6-88 [1] Cross recessed small pan head screw and spring washer Assembly GB 9074.7-88 Cross recessed pan head screw, spring washer and flat washer assembly GB 9074.8-88 Cross recessed countersunk head screw and conical lock washer assembly GB 9074.9-88 Cross recessed countersunk head screw and conical lock Tight washer assembly GB 9074.10-88 Cross groove hexagon head bolt and flat washer assembly GB 9074.11-88 Cross groove hexagon head bolt and spring washer assembly GB 9074.12-88 Cross groove hexagon head bolt, spring washer and flat Washer assembly GB9074.13-88 Hexagon head bolt and spring washer assembly GB 9074.15-88 Hexagon head bolt and external serrated lock washer assembly GB 9074.16-88 Hexagon head bolt, spring washer and flat washer assembly GB 9074.17-88 From Tapping screw and flat washer assembly GB /T 9074.18-2002 Cross recessed hexagon head self-tapping screw and flat washer assembly GB 9074.20-88 Cross recessed hexagonal head self-tapping screw and large washer assembly GB 9074.21-88 For assembly Spring Washers GB 9074.26-88 External Serrated Lock Washers for Assemblies GB 9074.27-88 Conical Lock Washers for Assemblies GB 9074.28-88.
1. Fixed anchor bolts, also known as short anchor bolts, are poured together with the foundation and used to fix equipment without strong vibration and impact. 2. The movable anchor bolt, also known as the long anchor bolt, is a detachable anchor bolt used for fixing heavy machinery and equipment with strong vibration and impact. 3. Expansion anchor bolts are often used to fix stationary simple equipment or auxiliary equipment. The installation of expansion anchor bolts should meet the following requirements: the distance from the center of the bolt to the edge of the foundation shall not be less than 7 times the diameter of the expansion anchor bolt; the foundation strength of the expansion anchor bolt shall not be less than 10MPa; there shall be no cracks in the drilling holes. The drill bit collides with the steel bars and buried pipes in the foundation; the diameter and depth of the drill hole should match the expansion anchor bolts. 4. The bonding anchor bolt is a kind of anchor bolt commonly used in recent years, and its method and requirements are the same as the expansion anchor anchor bolt. However, when bonding, pay attention to blowing out the debris in the hole, and do not get wet. [1]
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