CN113909823B

CN113909823B - Method for machining upright column flange of quayside container crane

Info

Publication number: CN113909823B
Application number: CN202111312364.XA
Authority: CN
Inventors: 余良辉; 钱亮亮; 陈冲; 孙婷婷; 李文灿; 崔雯; 徐向华
Original assignee: Shanghai Zhenghua Heavy Industries Co Ltd
Current assignee: Shanghai Zhenghua Heavy Industries Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-11-08
Anticipated expiration: 2041-11-08
Also published as: CN113909823A

Abstract

The invention discloses a method for processing a flange of a stand column of a quayside container crane, which takes a binding surface before the flange is dismantled as a reference, and symmetrically leads out 3 reference points to webs on the upper side and the lower side of the flange respectively so as to determine two completely parallel reference surfaces. The invention can reduce the difficulty of scribing the thickness allowance of the flange.

Description

Method for machining upright column flange of quayside container crane

Technical Field

The invention relates to a crane steel structure installation method, in particular to a method for machining a column flange of a quayside container crane.

Background

With the continuous development of port trade, the shore container crane is developed in a large-scale trend year by year, in order to not influence the normal operation of a wharf, a plurality of users require the crane to be installed into a complete machine by a manufacturer and debugged and then integrally delivered, but in the transportation process of the complete machine, the crane is sometimes limited by the height of buildings such as bridges and the like, the height of the crane during transportation needs to be reduced, and therefore, the shore container crane capable of reducing the height during transportation is designed. The flange plate is designed in the middle of the door frame upright post of the quayside container crane, as shown in figures 1 to 3, the flange plate 1 is fastened by adopting bolt connection, the height of the whole upper structure of the door frame upright post 2 is reduced before the crane is transported, and the flange plate is transported to a user wharf and then is installed in place again.

When the door frame upright post of the container crane is manufactured, in order to ensure that the straightness and the torsion of an upper upright post and a lower upright post meet the requirements, the door frame upright post is manufactured and assembled according to the following steps:

s1, independently manufacturing an upright column into a box body in an up-and-down segmented mode, and correcting straightness and torsion resistance;

s2, reserving 10mm of machining allowance for the thickness of a flange plate during blanking, performing double-sided white scraping machining after blanking, keeping the allowance of 5mm, welding the allowance with the upright post, performing machining, pairing bolt holes in pairs, and fixing the bolt holes into an assembly;

s3, assembling the upper and lower sections of the stand column and the flange plate assembly into an assembly, and welding the welding seam between the flange and the stand column box body after the data adjustment and detection are qualified;

and S4, removing the flange fixing bolt after welding.

Because the welding between segmentation and the flange about the stand, the welding shrink has produced the tensile stress to the flange, demolishs the back at flange fixing bolt, and stress release leads to the flange to appear warping, if direct reinstallation then can lead to flange binding face clearance out-of-tolerance problem, uses to produce the influence to high strength bolt, unsatisfied design requirement, so need carry out the machine tooling to flange binding face.

In order to ensure that the straightness and the torsion resistance of the processed flange binding surface after the vertical column is assembled in the upper and lower sections meet the requirements, the assembly ground sample lines of the upper and lower vertical column sections need to be marked on the ground before the upper and lower flanges are marked, then the upper and

lower sections

3 and 4 of the vertical column are arranged according to the ground sample lines, the straightness and the torsion resistance of the upper and

lower sections

3 and 4 of the vertical column are ensured, a gap a (shown in figures 4 and 5) of 100-200 mm can be properly reserved between the flanges, then the processing reference of the flange surface on one side is determined, the thickness processing allowance reference of the flange on the other side is marked by the determined reference of one side, and the processing surfaces of the upper and lower flanges need to be ensured to be parallel. Although the mode can meet the final quality requirement, the process is complicated, the upright posts need to be adjusted for many times in an up-and-down subsection mode, and the difficulty and the workload of scribing are increased.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method for processing a stand column flange of a quayside container crane, which can reduce the difficulty of scribing the thickness allowance of the flange.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for processing a column flange of a shore container crane comprises the following steps:

s1, respectively manufacturing an upper section and a lower section of an upright column, drilling holes in a matched mode in two flange plates, and fixing the two flange plates into a flange assembly through bolts;

s2, assembling and forming the upper and lower sections of the upright post and the flange component, and inspecting to be qualified, wherein 3 scribing boards are respectively arranged on the web plates on the upper and lower sides of the flange board;

s3, respectively leading out 3 reference points corresponding to the positions of the marking plates by taking the binding surfaces of the flange plates as reference, and knocking a sample punch mark;

s4, removing the bolts to separate the upper section and the lower section of the stand column, and detecting the flatness of the joint surface of the flange plate by respectively using the 3 determined sample punches on the marking plate as datum points;

and S5, marking the sample punch on the marking plate as a reference surface, and processing the allowance of the binding surface of the flange plate.

Preferably, in the step S2, 2 scribing boards are arranged on one edge of the flange plate, and 1 scribing board is arranged on the opposite other edge;

the surface of the scribing plate and the edge of the flange plate are on the same plane.

Preferably, in the step S4, the flatness of the joint surface of the flange plate is detected to be not more than the reserved machining allowance, and if the flatness is out of tolerance, the fire correction is required.

In order to reduce the difficulty of flange thickness allowance marking, after the assembly of an upper upright column and a lower upright column and a flange is finished, and the straightness and the torsion are detected to be qualified, flange bolts are not dismounted temporarily, a flange binding surface (the binding surface can be kept in a state before assembly before the bolts are dismounted) is directly used as a reference, 3 points are selected randomly to determine a reference plane, the flange is deformed after the flange bolts are dismounted, so that the determined reference planes are required to be symmetrically led to upper and lower webs, the two led reference planes are completely parallel, and after the subsequent flange bolts are dismounted, the reference plane led out from the upper and lower webs is directly used as a flange processing reference, so that the process of readjusting marking in upper and lower sections of the upright columns is avoided, and a large amount of adjusting and measuring work is reduced.

Drawings

FIG. 1 is a schematic view of an upper door frame column of a prior art shoreside container crane;

FIG. 2 is an enlarged schematic view of position I in FIG. 1;

FIG. 3 isbase:Sub>A schematic view in the direction A-A of FIG. 2;

FIG. 4 is a schematic illustration of a prior art flange processing method;

FIG. 5 is an enlarged schematic view of position II in FIG. 4;

FIG. 6 is a schematic view of step S1 of the method for processing a column flange according to the present invention;

FIG. 7 is an enlarged schematic view of position III of FIG. 6;

FIG. 8 isbase:Sub>A schematic view in the direction A-A of FIG. 7;

fig. 9 is an enlarged schematic view of the position i in fig. 8.

Detailed Description

In order to better understand the technical solutions of the present invention, the following further describes the technical solutions of the present invention with reference to the accompanying drawings and examples.

Referring to fig. 6 to 9, the method for processing the column flange of the quayside container crane provided by the invention comprises the following steps:

s1, manufacturing an upper section 5 and a lower section 6 of an upright column respectively, blanking and scraping white two flange plates 7, drilling holes in a matched mode, and fixing the flange plates into a flange assembly through bolts;

s2, assembling and forming the upper and

lower sections

5 and 6 of the upright column and the flange component, and inspecting to be qualified, wherein 3 scribing boards 8 are respectively arranged on webs on the upper side and the lower side of the flange board 7, the scribing boards 8 need to be arranged at positions convenient for measurement, wherein 2 scribing boards 8 are arranged on one edge of the

flange board

7, 1 scribing board 8 is arranged on the other opposite edge, and the surface of each scribing board 8 and the edge of the flange board 7 are on the same plane so as to facilitate measurement;

s3, with the binding surface of the flange plate 7 as a reference, respectively leading out 3 reference points at positions corresponding to the marking plate 8 by adopting a straight steel ruler, knocking sample punching marks, and paying attention to the fact that the marks on the upper side and the lower side of the flange plate 7 are symmetrical to ensure that the reference surface formed by the upper and lower leading-out 3 points is a parallel surface;

s4, removing bolts to separate the upper and

lower sections

5 and 6 of the stand column, respectively using the 3 determined sample punches on the marking plate 8 as reference points, detecting the flatness of the joint surface of the flange plate 7, wherein the flatness cannot exceed the reserved machining allowance, and performing fire correction if out of tolerance occurs;

and S5, processing the allowance of the binding surface of the flange plate by using the mark of the sample punch on the marking plate as a reference surface.

In conclusion, the method for processing the flange of the upright post of the quayside container crane, provided by the invention, has the advantages that the binding surface before the flange plate is disassembled is used as a reference, 3 reference points are symmetrically led out to the webs on the upper side and the lower side of the flange plate respectively, so that two completely parallel reference surfaces are determined, the upper subsection and the lower subsection of the upright post are disassembled without readjusting the state of the upper subsection and the lower subsection of the upright post, and the binding surface of the flange plate is directly processed by the reference surface led out from the webs; when the attachment surface of the flange plate faces upwards and 200mm of the lower two sides symmetrically leads out the datum point, in order to measure conveniently, the scribing plate is additionally arranged on the web plate, the surface of the scribing plate and the edge of the flange are on the same plane, so that the steel ruler can be directly used for scribing to determine the datum point, and the difficulty of scribing measurement is reduced.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. A method for processing a column flange of a shore container crane is characterized by comprising the following steps:

s3, respectively leading out 3 reference points corresponding to the positions of the marking plate by taking the binding surface of the flange plate as a reference, and knocking a sample punching mark;

s4, removing bolts to separate the upper section and the lower section of the upright column, and detecting the flatness of the joint surface of the flange plate by respectively using 3 sample punches determined on the marking plate as datum points;

s5, marking the sample punch on the marking plate as a reference surface, processing the allowance of the binding surface of the flange plate,

in the step S2, 2 scribing boards are arranged on one edge of the flange plate, and 1 scribing board is arranged on the other opposite edge;

the surface of the scribing plate and the edge of the flange plate are on the same plane,

the binding surfaces of the flange plates before the flange plates are removed are used as a reference, 3 reference points are symmetrically led out from the web plates on the upper side and the lower side of the flange plates respectively, so that two completely parallel reference surfaces are determined, the states of the upper section and the lower section of the upright column do not need to be readjusted after the upper section and the lower section of the upright column are disassembled, and the binding surfaces of the flange plates are directly processed by the reference surfaces led out from the web plates.

2. The method for processing the column flange of the quayside container crane according to the claim 1, wherein: and in the step S4, detecting the flatness of the joint surface of the flange plate to be not more than the reserved machining allowance, and if the flatness is not more than the preset machining allowance, performing fire correction.