Gantry crane large pinwheel manufacturing accuracy control method

Abstract

The invention relates to a gantry crane large pinwheel manufacturing jig and accuracy control method, and belongs to the field of gantry crane structure manufacturing. Bottom plate, track plate and whole assemblage manufacturing processes are carried out on a plane jig and an assemblage jig; a bottom plate is subject to assemblage-welding on the plane jig in a marking manner, and track steel is also subject to assemblage-welding on the plane jig; the bottom plate and a track plate which are obtained after assemblage are placed on the assemblage jig, and meanwhile, a rib plate, a panel and a needle pin ring plate are subject to assemblage-welding; a reasonable assembling-welding sequence is used; and the bottom plate is subject to assembling-welding, the steel track steel is subject to assembling-welding, and the bottom plate, the track plate, a stiffening plate, the panel and a needle hole plate are subject to assembling-welding. The reasonable welding sequence is used in a matched manner, the basic principle is that a T-shaped welding opening is firstly achieved, a separating plate is welded in the vertical direction and the horizontal direction in sequence, symmetry welding is adopted in bottom plate and track welding and separating plate welding, the middle of a needle pin ring plate is welded firstly, and the two sides of the needle pin ring plate are welded secondly. According to the gantry crane large pinwheel manufacturing jig and accuracy control method, through the reasonable manufacturing process, the construction difficulty can be reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to a mold for manufacturing a large needle wheel of a portal crane and a precision control method, and belongs to the technical field of portal crane structure manufacturing. Background technique [0002] At present, a considerable number of portal cranes in China, especially large-tonnage portal cranes, adopt the form of eight struts, and the large needle wheel is an important part of the slewing mechanism of the eight-strut portal crane. The large needle wheel is an annular structural member, on which are distributed circularly needle posts meshing with the cycloid pinion; and an annular raceway supporting the horizontal roller. If the deformation of the large needle wheel during the welding process is unfavorably controlled, it will cause excessive radial and axial deformation of the large needle wheel, which will affect the final manufacturing accuracy of the large needle wheel, cause the annular raceway and the annular needle...

AI Technical Summary

Problems solved by technology

If the deformation during the welding process of the large needle wheel is unfavorably controlled, it will cause excessive radial and axial deformation of the large needle wheel, which will affect the final manufacturing accuracy of the large needle wheel, cause the annular raceway and the annular needle column to be out of center, and affect the rotation of the door seat Institutional operating status

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