Clever use of hexagonal pad screw

When assembling some products, six hexagonal pad screws need to be tightened at the gland. It is usually tightened with a spreading wrench. Due to the unfavorable screw position, it causes great inconvenience to assembly, low efficiency and high labor intensity. For this reason, we have made improvements, using another hexagonal pad screw and pneumatic wrench to assemble this hexagonal pad screw, and the effect is better. The introduction is as follows.
First screw the two nut washers on the end of the hexagonal washer screw, and ensure that the two nuts are tightened to each other. The threaded ends must not be exposed, and the six aspects of the two nuts must be consistent. Then insert the nut on the screw into the connecting sleeve of the pneumatic wrench. Install the screw in the inner hexagon of the hexagonal pad screw, place the screw in the corresponding position, and then press the pneumatic wrench switch to complete the screwing and assembly of the screw.
This method can overcome disadvantages of installation, improve assembly efficiency, and reduce labor intensity. But the first time it is used, the screw may be broken due to the inaccurate feeling of tightening the screw. As long as you pay more attention to the feeling when using it, this phenomenon can be completely avoided.
Hexagonal pad screws for heavy-duty machine tools and forging equipment often happen to be screwed, bumped, broken and disassembled in the thread part during equipment overhaul. If they are replaced, the cycle is long, the cost is high, and the workload is large. After the hexagonal pad screw is damaged How to fix
Firstly, cut out a pit with a diameter of about 200mm and a depth of about 200mm from the foundation cement around the hexagonal pad screw whose thread has failed, and then cut about 100mm under the thread of the hexagonal pad screw with an air cutting gun, and cut and repair the welding groove.
1. Weld and install the new screw, the length of the screw is equal to the original length of the original cut screw, and the outer reinforcement material is Q235 sleeve welding (Figure 1).
2. Use the closest thread standard sleeve to buckle the remaining end of the foot stud that has been gas-cut and process a screw with a screw sleeve to make the hexagonal cushion screw equal to the length of the original foot stud. Tighten the screw sleeve After it is on the ground, weld it firmly as shown in Figure 2.
The welding rods are all made of J402. The repaired hexagonal pad screws are filled with cement, and the machine can be installed after being dried.