wholesale stainless steel washer,wholesale spring washer,OEM Flat Washer

Fasteners are the most widely used mechanical parts! It can be seen everywhere. Various fasteners can be seen in various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, instruments and supplies. Washers are one of them. What are the classifications of washers? What is the function of the gasket? Why use washers?

What are the classifications of gaskets

Washers are divided into: flat washer -c, large washer -a and C, extra large washer -c, small washer - A, flat washer - A, flat washer - chamfer type - A, high-strength washer for steel structure, spherical washer, conical washer, square bevel washer for I-beam, square bevel washer for channel steel, standard spring washer, light spring washer, heavy spring washer, internal tooth lock washer, internal serration lock washer, external tooth lock washer, external serration lock washer Single lug lock washer, double lug lock washer, outer tongue lock washer, lock washer for round nut.

Plain washers are generally used in connectors. One is soft and the other is hard and brittle. Their main function is to increase the contact area, disperse the pressure and prevent the soft material from being crushed. The basic function of the spring washer spring is to give a force to the nut after the nut is tightened to increase the friction between the nut and the bolt! The material is 65Mn (spring steel), the heat treatment hardness is hrc44 ~ 51hrc, and the surface is oxidized.

Huawei (spring) washer, snap spring is a kind of elastic cushion or snap lock washer, which can prevent bolts from loosening. The operating principle of the lock washer is very simple. It consists of two washers. The outer side has a radial convex surface, while the inner side has a helical tooth surface. During assembly, the inner inclined tooth surfaces are opposite, and the outer radial convex surface is in a meshing state with the contact surfaces at both ends. When the connecting piece is vibrated and the bolt tends to loosen, only the relative dislocation between the inner inclined tooth surfaces of the two washers is allowed to generate lifting tension, so as to achieve 100% locking.

Spring washers are widely used in load-bearing and non load-bearing structures of general mechanical products. They are characterized by low cost and easy installation, and are suitable for parts with frequent assembly and disassembly. The automatic selection of washer is included, but the anti loosening ability of spring washer is very low! Especially in European and American countries, the adoption rate of products requiring high reliability is very low, especially the important bearing structure connection parts have long been abandoned. Our country still has some applications in military industry, but it has been improved to stainless steel. Steel spring washers have long been banned in CASC! In other words, it is very unsafe. There are two reasons: 1 is "rising circle" 2 is hydrogen embrittlement.

What is the function of the gasket? Why use washers?

Washer, a kind of fastener in the shape of a ring, is used between the support surface of a bolt, screw or nut and the surface of a connecting part to reduce the contact surface area of the connected part, reduce the pressure per unit area and protect the surface of the connected part from damage; The spring washer can also prevent the nut from loosening.

The spring washer is mainly used to prevent looseness. The flat washer has no loosening function, that is, the flat washer only increases the contact area, and the spring washer can prevent looseness. For example, the bolts connecting the motor and the base generally need spring washers, because the motor vibrates, and if there is no spring washer, the nut will loosen. Generally, the fasteners on the equipment with vibration are equipped with spring washers, and the flanges generally do not need to add flat washers. Whether to add a spring washer to the flange is related to the medium flowing through the pipeline. If it is easy to produce pulses, it is better to add a spring washer. There is also high-speed fluid, and the caliber changes frequently. Do not generalize.

On some valves, the gland flange of the stuffing box needs to be added with spring washer. In a word, the flat washer increases the fastening contact area; The spring pad can be used in places with vibration to prevent looseness; No spring washer is required for fastening PVC flange.

If we know that the main function of the spring washer is to prevent looseness, what are the specific service conditions of the spring washer?

The service conditions of spring washer are as follows: for the application of spring washer, the following four standards can be applied: standard spring washer (GB93-1987), light spring washer, (gb859-1987) and heavy spring washer (gb7244-1987). Purpose of spring washer: it is installed under the nut to prevent the nut from loosening. It is stated in the national standards. Hexagon slotted nut is specially used with the bolt with hole at the end of the screw to insert the cotter pin from the groove of the nut into the hole of the screw to prevent the nut from loosening automatically. It is mainly used in occasions with vibration load or alternating load.

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