What is the tolerance range of precision screws?
What is the tolerance range of precision screws?
Figure 1 is a schematic structural diagram of Guangdong Yueluo Hardware Industry Co., Ltd. Figure 2 is a front view of the structure of the riveted positioning block. FIG. 3 is a top view of the structure of the riveted positioning block. Figure 4 is a front view of the structure of the riveting lower die. Figure 5 is a side view of the structure of the riveting lower die. 1, I is a rivet, 2 is a riveting positioning block, 3 is a product, 4 is another product, and 5 is a riveting lower die. [0017] Referring to Figure 2, Figure 3, 2-1 is a positioning pin, 2-2 is a rivet hole, and 2-3 is a through hole. Referring to Figure 4, Figure 5, 5-1 is a positioning hole, 5-2 is a guide block, 5_3 is a countersunk screw hole, and 5_4 is a vacant hole.
Cylindrical pins are widely used, and they are usually provided with matching pin holes. For the tails of cylindrical pins exposed outside the pin holes, they usually do not have a guiding function, which cannot meet the needs of quick installation of workpieces.
In the prior art, the screw suction device can be implemented in the following two ways. One is to use a magnet to magnetize the electric bit head, and the electric bit head is used to approach the screw, and the screw is stuck by the electric bit head, so that the function of picking up the screw can be realized; The vacuum generator is used to form a negative pressure in the screw guide groove, and the screw is sucked into the tube to realize the screw pickup. The disadvantage of this solution is that in the process of picking up the screws, the grooves of the screws cannot be aligned, which leads to the deviation or leakage of the screws. The disadvantage of this solution is that the screw with an aspect ratio of less than 1.5 is prone to suction and skew, and the stability is not high. It can be seen that the existing technology still needs to be improved and developed.
Pull rivets, * marked as blind rivets, are based on the principle of Hooke's law. After the two joints are clamped with special equipment for pull rivets, the metal of the ring-shaped collar is squeezed and filled to the point where there are many rivets. In the groove of the bolt column of the annular groove, a fastening method that tightly combines the collar and the bolt column. A riveting machine is a mechanical device that uses rivets to riveted items together in batches. The riveting machine is mainly assembled by rotation and pressure. The riveting machine is mainly used in the occasions where rivet riveting is required. The common specifications and models include pneumatic, hydraulic and electric, single-head and double-head.
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