Double thread Self-tapping screw furniture connector lengthening screw woodworking screw rod M4 M5

Furthermore, the outer contour of the cross section of the cylindrical part is regular polygon. It can be seen from the above description that setting the outer contour of the cross section of the cylindrical part as a Regular polygon can prevent the Rivet nut from rotating with the bolt when the bolt is assembled with the Rivet nut. Please refer to Figure 1 to Figure 2. The first embodiment of Guangdong bolt is: a Rivet nut, including a flange shaped nut body 1. The nut body 1 is made of stainless steel. The central axis of the nut body 1 is provided with a through hole. The nut body 1 is composed of a cylindrical part and a head 2 connected to one end of the cylindrical part. The external contour of the cross section of the cylindrical part is circular, and the cylindrical part includes an interconnected thread part 4 and a deformation part 5.

Locating pin is a pin designed for accurate positioning of two adjacent parts of the mold in the mold composed of two or more parts. It can be seen that the locating pin is the product that plays the role of positioning. The mold must be accurately synchronized when it is closed, and the locating pin can make the upper and lower the second mock examination play the role of accurate positioning. In the mold design and manufacturing of Yue Luo, the positioning pin is one of the common parts. As it is only used for positioning between parts, few people pay too much attention to it. In the cold stamping process of Yueluo, the dimensional accuracy of the punched parts depends on the size of the working parts of the convex and concave molds, and the difference in size between them constitutes the gap between the punching molds. Clearance is an important process parameter in the design of stamping dies, and its size has a significant impact on the quality of the cross section of the workpiece, the punching force, and the lifespan of the mold. Excessive clearance can result in burrs during punching and shearing; If the gap is too small, secondary cracks and extrusion burrs will appear on the cross-section, which can lead to unsatisfactory quality of the punched cross-section. However, a reasonable gap not only helps to improve the quality of the punched cross-section, but also helps to improve the lifespan of the tool.

In another implementation of Guangdong Yueluo Hardware Industry Co., Ltd., the discharge port of vibration disk 2 is matched with the screw holding hole 35. After the screws are sorted and sorted in vibration disk 2, they can enter the screw holding hole 35 through the discharge port. Preferably, a guide rail 6 is arranged between the discharge port of the vibration disk 2 and the screw holding hole 35. The screws enter the screw holding hole 38 from the discharge port through the guide rail 6. Through this setting, automatic screw sorting and slotting can be achieved, improving efficiency and saving manpower costs.

[6] 4. The structure is complex and there are many parts, many of which are fragile and difficult to replace, prone to faults, and have a low lifespan. [7] 5. Due to the parallel axis of the screw nut assembly and the screw nut assembly, the gear axis and the motor center axis, each system cannot design all parameters according to the requirements. Specifically, (2) the motor meshing teeth that mesh with the motor teeth cannot be made too large, and cannot exceed the axis of the screw nut assembly and the screw nut assembly, otherwise interference will occur. Therefore, the number of teeth and modulus of the gear are greatly limited, Can only be limited to a certain scope;

Guangdong Yueluo Hardware Industry Co., Ltd. is involved in fasteners, especially wooden screws used to fix non rigid materials such as wood and plastic. Guangdong Yueluo Hardware Industry Co., Ltd. has threaded parts with conical angles and threaded heads. The head of a screw can be countersunk, hemispherical, or other shapes. The screw head has a groove that fits with the tool movement. The groove can be a single character symbol groove, a concave cross groove, or a groove of other shapes.