Precautions when working with nuts
There are various types of nuts, and the commonly used nuts are national standard, British standard, American standard, and Japanese standard. According to different materials, nuts are divided into several types such as carbon steel, high toughness, stainless steel plate, and plastic steel profile. According to the product attributes, the standard numbers of different countries are divided into general, non-standard, (old) national standard, national standard, American system, thread nominal diameter, and German standard water pipe. Different sizes and different threads are divided into different specifications. What should be paid attention to when working with nuts? 1. The size of the spanner wrench should match the size of the nut, and a small wrench should not be used to add a waterproof sleeve. 2. During installation, it is strictly forbidden to hammer into the nut to avoid damage to the nut thread. 3. The friction surface of the solved prefabricated components is not allowed to be stained with oil, soil and other dirt during assembly. 4. The friction surface of the parts should always be kept dry during installation, and should not work in the rain. 5. The electric wrench should be checked regularly when using it to ensure the accuracy of the torque, and operate according to the correct tightening sequence. The above is what Xiaobian brought to you when using nuts. If you are interested in other content, you can also consult Xiaobian. Xiaobian will continue to update for you.
How to deal with the sliding wire of nut fasteners?
Nut fastener slip wire is that during the use of nut fasteners, due to various reasons, the nut cannot rotate normally on the thread, so that it cannot be tightened or released. The slippery wire of the nut fastener will affect the normal operation of the equipment, and even cause damage to the equipment in severe cases. Therefore, it is necessary to find the root cause of the problem in time and take corresponding solutions. Below, maijin will learn more about the causes and treatment methods of nut fastener slippage. the
1. Reasons for thread slipping of nut fasteners Metal fatigue: After the nut has been used many times, the sharpness of the thread will decrease, and the meshing area on the thread will also become smaller, making the nut easy to slip when tightening. The hardness of the nut shell is too low: the hardness of the nut shell itself is too low and not strong enough, so whether it is loosening, fastening or long-term use, it will cause the nut to slip. Poor processing quality: There may be large processing errors in the production and processing of nuts, resulting in large internal stress inside the nut, which in turn leads to easy thread slippage during use. Unsmooth bolt thread surface: If the bolt surface is not smooth, it will be difficult to twist on the thread when the nut is tightened, resulting in nut slippage. Incomplete cleaning: The nut needs to be cleaned before use. If there are grease, dust and other stains on the surface of the nut, it will cause the nut to slip. Over-tightening: If the nut is over-tightened, it will cause the nut to fall on the bolt and not rotate, which will cause the nut to slip. the
2. How to deal with slippage of nut fasteners Replace new nuts If the degree of nut slippage is serious, it is generally recommended to replace with new nuts so as not to affect the normal operation of the equipment. Increase nut strength If the degree of nut slippage is light, you can try to increase the nut strength, which can smooth the threads of nuts and bolts to a certain extent, thereby solving the problem of thread slippage. Use an electric wrench The electric wrench has the characteristics of high-speed rotation and can quickly tighten the nut. Care should be taken during use to select the appropriate torque to avoid damage to the nut. Find the force point If the reason for the nut slippage is uneven fastening force, you can solve the problem by changing the position of the force point. The point of force needs to be moved outward, which makes it easier to turn the nut. Surface treatment Selecting bolts and nuts with smooth surfaces can effectively reduce the probability of slipping wires. In addition, the treatment of screws with rough surfaces, such as deburring and polishing, can also make the surface of the screws smoother and reduce the probability of slipping. Increase and decrease pressure When in use, the pressure can be increased or decreased according to the degree of thread slippage of the nut. If the nut slide wire is light, the pressure can be increased appropriately, which can make the nut rotate more easily. If the nut slippage is serious, the pressure needs to be reduced appropriately. Treatment of bolt surface If the reason for nut fastener slippage is rough bolt surface, smoothing methods such as polishing can be used to make the surface smoother and reduce the probability of nut slippage. Clean the surface of the nut Before using the nut, it needs to be cleaned to remove the grease, dust and other stains on the surface, and prevent the stain from causing the nut to slip. The above are the causes and treatment methods of thread slipping of nut fasteners. It is necessary to choose the appropriate treatment method according to the specific situation. When in use, pay attention to maintenance and maintenance to avoid affecting the normal operation of the equipment due to nut slippage.