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Spring washersare in the screw industry and are often called elastic pads. Spring washers’ material is stainless steel and carbon steel, and carbon steel is also iron. The generally used spring washer specifications and sizes are M3, M4, M5, M6, M8, M10. M12, M14, M16. These specifications are more commonly used. Spring gasket national standard GB/T 94.1-87, the standard specifies the specifications of 2-48mm standard spring gasket.
The following is a summary of the content
The main material of spring washers
The main use of spring washers
How to use anchor bolts
Spring washers is usually made of 65MN spring steel or 70# carbon steel, 3Cr13, and can also be used in stainless steel materials SUCHS304 or SUS316 as well as phosphor bronze materials.
The spring washers device is used under the nut to prevent the nut from loosening.
It is stated in national standards.
Hex slotted nut is designed for use with bolts with holes at the end of the screw, so that the opening pin is inserted from the slot of the nut into the hole of the screw to prevent the nut from automatically loosening, mainly used for cases with vibration load or alternating load.
Methods to prevent nuts from automatic loosening in mechanical design and production are:
1. Padding washer;
2. Use hex slotted nut + opening pin;
3. Add a cushion stop gasket;
4. Hexagonal bolt hexagonal head opening inserted into the steel wire.
Spring washers is used for anti-loosening, such as the bolt connected to the motor and the base generally to add a spring pad, because the motor vibration if there is no spring pad, the nut will be loose Generally with vibration on the equipment on the fasteners equipped with spring gaskets, flanges generally do not need to add gaskets. Flange plus without spring gasket and pipeline circulation medium is related, if it is easy to produce pulses, it is best to add spring gasket, as well as high-speed fluid, frequent changes in caliber. Don't generalize. Some valves on which the packing letter gland flange needs to be filled with spring gaskets. Spring gasket quick easy automatic selection is included.
Spring washers can play a role in anti-loosening, increase the preload function, while the flat washer does not have this function, it can be used to increase the tightening contact area, prevent the friction between the bolt and the workpiece, protect the surface of the connector to prevent the bolt nut from scratching the surface of the workpiece when tightening.
However, some important connections, such as places that mainly rely on compression to generate friction to transmit power, can not use spring pads, which reduce the rigidity of the connection, and are prone to accidents. You can skip spring washers.When the strength of the connected parts is low, a flat pad or flange bolt is used to increase the contact area, and a spring pad must be used when there is a relatively large fluctuation in the temperature of the vibration, pulse, and medium.
Ningbo Yipianhong Fastener Co., Ltd. was established in 2001, specializing in the production of various types of U-bolts, nuts and screws, with an annual production capacity of 30,000 tons and an annual turnover of 300 million yuan. Products include ANSI/ASTM, DIN, BS, ISO, GB, JS and other standards, mainly used in U-bolt seals and oil pipeline valves.
