Scribing method for axial center holes of bottom landing leg beams of large-scale gantry crane

A technology of gantry cranes and center lines, which is applied to workshop equipment, manufacturing tools, etc., to achieve the effects of saving purchase costs and special personnel, improving efficiency and saving costs
CN103240724BInactive Publication Date: 2015-05-20JIANGSU DATONG HEAVY IND
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU DATONG HEAVY IND
Publication Date
2015-05-20
Estimated Expiration
Not applicable ยท inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Disclosed is a scribing method for axial center holes of bottom landing leg beams of a large-scale gantry crane. The scribing method is implemented by steps of adopting a laser level and a theodolite, folding rigid legs, drawing center points on an upper plane of two axial holes on the plane of the rigid legs after folding is qualified, and drawing center points of a lower plane of the two axial holes by the theodolite. The scribing method for axial center holes of bottom landing leg beams of the large-scale gantry crane has the advantages that by the high-precision theodolite, the problem of scribing accuracy before boring of large structural members is solved, and proved practically, product quality is guaranteed by the above technical scheme.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The invention relates to a scribing method, in particular to a scribing method for the central hole of the shaft hole of the bottom beam of a large gantry crane, and belongs to the technical field of crane manufacturing. Background technique

[0002] Due to the limitation of the size, volume and weight of structural parts, the boring of structural parts cannot be directly processed on coordinate boring machines, CNC boring machines or CNC floor boring machines. Generally, boring after marking is required. Therefore, the accuracy of marking is directly related to the accuracy of boring. If the error is too large, it will affect the use of the product, increase the maintenance cost, and may seriously shut down and discard it. For example, when the parallelism, perpendicularity, and coaxiality of the center hole of the bottom beam of the outrigger of a large shipbuilding gantry crane are too large, dozens of wheels running on the same rail may chew the rail. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More