GB/T 94.4-2017Specifications for spring washers—Conical spring washers (English PDF)

Foreword

GB/T 94 "elastic gasket technical conditions" includes the following sections.

--- GB/T 94.1 elastic washer spring washer;

--- GB/T 94.2 spring washer technology conditions tooth, serrated locking washer;

--- GB/T 94.3 elastic gasket technical conditions saddle, wave-shaped washer;

--- GB/T 94.4 elastic washer conical spring washer technology.

This section GB/T 94 Part 4.

This section drafted in accordance with GB/T 1.1-2009 given rules.

1 Scope

GB/T 94 provisions of this part of the cone elastic gasket technical conditions. This section applies to the following tapered elastic washers.

--- GB/T 956.3 tapered elastic washers;

--- GB/T 9074.31 tapered elastic washers for assembly.

This section can also be used for non-standard tapered elastic washers.

Note 1. Conical spring washers help to balance the preload loss due to deformation and creep in the bolt/nut assembly. Tapered washers have the following capabilities.

--- have enough flexibility to improve the connection of all the elastic side;

--- The inherent elastic force can compensate for the loss of preload, to meet the clamping force requirements, to ensure the reliability of the connection.

Note 2. If the lateral force overcomes the friction between the clamped components, a relative movement between the bolt and the nut will occur. Conical spring washers generally can not be prevented by Loose connection due to lateral movement. Therefore, in use, check that the tapered spring washers maintain the clamping force.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 90.1 fastener acceptance inspection

GB/T 90.2 Fasteners signs and packaging

GB/T 230.1 Metallic materials Rockwell hardness test Part 1: Test methods (A, B, C, D, E, F, G, H, K, N, T scale)

GB/T 956.3 tapered elastic washers

GB/T 1222 spring steel

GB/T 4340.1 Vickers hardness test of metallic materials - Part 1: Test methods

GB/T 5267.1 fastener plating

GB/T 5267.2 fasteners non-electrolytic zinc coating

YB/T 5063 heat treatment of spring steel

3 Technical conditions