Mechanical meshing high-strength bolt assembly for steel sheets

Abstract

The invention discloses a mechanical meshing high-strength bolt assembly for steel sheets. The mechanical meshing high-strength bolt assembly comprises a bolt, gaskets sleeving a bolt rod, and a nut for pre-tightening the gaskets and a bolt head, wherein the gaskets comprise the convex gasket close to the bolt head and the concave gasket close to the nut, the convex gasket and the concave gasket are provided with matched press patterns, at least two layers of steel sheets are fixed between the convex gasket and the concave gasket in a fitting mode, and the steel sheets form a mechanical meshing effect under the pre-tightening effect of the convex gasket and the concave gasket. On the basis of the adoption of bolt connection, the connecting performance of the bolt is improved, compared with traditional bolt connection, the connecting rigidity and the shear bearing capacity are improved, and the mechanical meshing high-strength bolt assembly is suitable for large-batch and large-scale production.

Description

technical field [0001] The invention relates to a bolt assembly, in particular to a mechanically engaged high-strength bolt assembly for thin steel plates. Background technique [0002] At present, thin steel plates are usually connected by bolts, but there are the following problems when connecting thin steel plates with bolts: 1) The anti-slip coefficients of the steel friction surfaces treated in different ways given in the current specifications are all above 0.3, while thin steel plates There is a galvanized layer on the surface for antirust. Relevant experimental studies have shown that the anti-slip coefficient of galvanized thin steel sheets is only about 0.1, so the bolts used to connect thin steel sheets will slip early; 2) thin steel sheets usually Very thin, too thin plate makes the connection prone to plate pressure failure. [0003] When subjected to dynamic loads such as wind loads, the low slip resistance coefficient and insufficient pressure bearing capacit...

AI Technical Summary

Problems solved by technology

[0002] At present, thin steel plates are usually connected by bolts, but there are the following problems when connecting thin steel plates with bolts: 1) The anti-slip coefficients of the steel friction surfaces treated in different ways given in the current specifications are all above 0.3, while thin steel plates There is a galvanized layer on the surface for antirust. Relevant experimental studies have shown that the anti-slip coefficient of galvanized thin steel sheets is only about 0.1, so the bolts used to connect thin steel sheets will slip early; 2) thin steel sheets usually Very thin, too thin plate makes the connection prone to plate pressure failure

[0003] When subjected to dynamic loads such as wind loads, the low slip resistance coefficient and insufficient pressure bearing capacity of the thin steel plate will reduce the fatigue resistance of the bolted connection, and the overall structure may fail prematurely at the bolted connection due to insufficient fatigue resistance

If the welding seam connection is used instead, it will bring problems such as serious residual deformation of thin-walled components after welding, welding of thin steel plates, heavy on-site welding workload, and uneven welding quality.

Images