Hollow anchor rod, hollow grouting anchor rod, combined grouting anchor rod, industrial and mining iron anchor rod

The installation of riveting nuts is meticulous, and if the installation method is not correct, there may be a phenomenon of unstable riveting after riveting. If we had a customer who reported that the nuts would fall off after riveting, our technical personnel found that many customers used hammers or other impact methods to hit them on site. This installation method of riveting nuts can cause uneven force on the nuts and seriously affect the riveting effect. It appears that the nuts have been pressed in, but in reality, the flower teeth of the riveting nuts are not riveted to the plate at all, which is definitely not reliable riveting. The installation of rivet nuts must be carried out using specialized installation equipment, or simply using a press and stamping equipment (these simple equipment are generally available in factories).

During each repair, it is necessary to inspect the newly replaced double head bolts and other newly replaced accessories, with a focus on the head and guide parts of the double head bolts. It is also necessary to strictly inspect each part of the thread for cracks or dents, and to check the tooth shape of the double head bolts for any changes. Is there any abnormality in the pitch? If there is any abnormality, it must not be used again. When installing the connecting rod cap, a torque wrench should be used as a tool. It is necessary to tighten according to the specified standards, and the torque should not be too large or too small. It is also important to choose the matching manufacturer's double head bolts and double head studs.

High strength hexagonal head bolt combination screws are mainly used for steel structures, such as railway and highway bridges, boiler steel structures, industrial factories, high-rise civil buildings, tower and mast structures, lifting machinery, and steel structures that require the use of friction type high-strength bolt combination screws. Its characteristic is that the bolt, also known as the bolt, has an additional dodecagonal body at the end. When installing, a special electric wrench must be used, which has two socket heads on top and bottom, one on the hexagonal body of the nut and the other on the decagonal body of the outer hexagonal screw. When tightening, apply a clockwise force to the nut and an equal counterclockwise force to the dodecagonal body of the bolt, so that the neck between the end of the outer hexagonal screw and the dodecagonal body is subjected to torsional shear until the neck is cut off, and the installation is completed. This type of high-strength external hexagonal screw is a one-time screw that cannot be removed after installation.

"Reference standard editing
GB 90 Fastener Acceptance Inspection, Marking and Packaging
GB 196 Basic dimensions of ordinary threads (diameter 1-600mm)
GB 197 General Purpose Thread Tolerances and Fits (Diameter 1-35mm)
GB 230 Metallic Materials Rockwell scale
GB 699 Technical Conditions for High Quality Carbon Structural Steel
GB 1237 Marking Methods for Fasteners
GB 5267 Electroplating of Threaded fastener
GB6394 Metal Determination of Average Grain Size"

"Sometimes, iron screws are often seen to break, and sometimes stainless steel screws are also seen to break. But generally speaking, stainless steel screws are rarely broken. Because the stainless steel screw wire itself is relatively hard. But in specific circumstances, stainless steel screws can still break. So what are the main reasons for the fracture of stainless steel screws!
The reasons for the fracture of stainless steel screws are as follows:
1. There is a quality issue with the raw materials used for stainless steel screws, and the quality of the stainless steel screw wire is not good. There are many impurities and impurities, resulting in insufficient hardness of stainless steel screws.
2. Production process issues with stainless steel screws. For example, stainless steel screws with eccentric heads, as well as Q values that are too deep and R position designs that are too small during downward punching operations during production and manufacturing.
3. The customer applied excessive force when using stainless steel screws. Generally, you can perform a torque test to see the minimum breaking force, and then adjust the torque.
Of course, there are definitely more than three reasons for stainless steel screw breakage. But the above three reasons are the main reasons for the fracture of stainless steel screws. When stainless steel screws are found to be broken, they can be inspected step by step. See what exactly caused it"