Double Face Belleville Spring Lock Washers M4-M30 Alloy Steel Grade 8

M4 - M30 Alloy Steel Double Face Belleville Spring Lock Washers

The main function of M4 - M30 Alloy Steel Double Face Belleville Spring Lock Washers is to protect the surface of the connecting piece from scratching the surface of the workpiece when the bolt and nut are tightened; the spring washer is anti-loosening. However, some important connections, such as the place where the power is transmitted by the friction force generated by compression, cannot be used with spring pads. If the rigidity of the connection is reduced, accidents are likely to occur. The spring washer can be omitted. When the strength of the connected parts is low, flat washers or flange bolts are used to increase the contact area. The flat washers mainly increase the contact area. The spring washers are anti-loosening. When there is vibration, pulse, and the temperature of the medium, it will be relatively large. When fluctuating, spring washers must be used. M4 - M30 Alloy Steel Double Face Belleville Spring Lock Washers can increase the pre-tightening force and has the effect of preventing loosening, but the flat washer does not.

Causes of open ring expansion and hydrogen embrittlement fracture

1. The ring expansion phenomenon of M4 - M30 Alloy Steel Double Face Belleville Spring Lock Washers is generally not a problem of the spring washer itself

2. The spring washer that expands the ring must be subjected to a radial external tension, which is derived from the tightening axial force generated by the tightening torque

3. The outer chamfer of the nut bearing surface produces a radial component of the axial clamping force, which causes the opening of the spring washer to expand. The smaller the chamfer diameter, the greater the possibility of ring expansion

4. Adding a flat washer between the nut and the spring washer helps to slow down or prevent the expansion of the ring, but the flat washer is too thin or too soft to prevent the expansion of the ring

5. The cause of hydrogen embrittlement fracture of spring washers is generally due to unreasonable heat treatment process, and the fracture caused by the failure to do the dehydrogenation treatment in time after electrogalvanizing.

A large number of experiments and long-term practical experience have confirmed the above analysis.

Advantages

1.Exact forging standard of knife edge and high hardness of surface make it easy to drill.

2.Using the advanced technology to control the core hardness, avoiding rupture effectivity,

3. Quick self drilling , drilling , tapping, locking the oncce, and combining with the strength.

4. Save contruction time, improve working efficency.