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Solid shaft assembling and welding method

A solid shaft, welding technology, applied in welding equipment, welding accessories, arc welding equipment and other directions, can solve the problem of difficult welding and other problems, and achieve the effect of guaranteed workpiece quality and excellent production process

Active Publication Date: 2010-12-01
CITIC HEAVY INDUSTRIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the method of assembling, welding, process control and inspection of the solid shaft, the present invention especially solves the deformation problem of the shaft through the preliminary technical preparation planning and process control, and solves the problem that the small-diameter solid shaft workpiece is difficult to assemble and weld

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] like figure 1 As shown, place 2 pairs of rotating tires at a suitable position in the workshop (it can be at the edge of the pit, if the welding manipulator is used for submerged arc welding in the future, the position should be selected within the working range of the welding manipulator), and each pair of rotating tires is supported separately Rod head 4 and rod tail 5, draw a line on the ground when placing the tires, place the tires on a straight line, and roughly adjust the closing distance of the tires and the distance between the tires and the tires according to the diameters of the rod head 4 and the rod tail 5 the horizontal distance between them.

Embodiment 2

[0025] like figure 2 , image 3 As shown, since there are two Ф100mm holes inside the solid shaft piston rod 6, it cannot be welded directly. Therefore, two pieces of steel pipe 7 are added inside before welding, which is equivalent to a backing plate. The steel pipe 7 is fully processed, the inner hole is Ф100mm, and the wall thickness is 8mm. Considering comprehensively, the symmetrical U-shaped welding groove is adopted, the bottom is firstly welded by manual arc welding, and then the steel pipe 7 is covered by ordinary submerged arc welding.

Embodiment 3

[0027] like figure 1 As shown, the rod head 4 and the rod tail 5 are placed on the rotating tire (at this time, the U-shaped groove should be in the flat welding position), and the joint distance of the rotating tire and the lateral distance between the rotating tires are adjusted again to ensure that the rod head 4 and the The rod tail 5 is placed horizontally, and the straightness accuracy of the centerline 6 of the entire solid shaft piston rod after the contact between the rod head 4 and the rod tail 5 is fixed, the steel wire is set at a fixed position on the side of the center line 6 of the solid shaft piston rod and at the highest point of the bevel , used to check the straightness at any time, check the straightness at both ends of the solid shaft piston rod center line 6 and the weld, and use a steel ruler to roughly check the outer surface of the groove.

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Abstract

The invention discloses a solid shaft assembling and welding method. Two pairs of rotating tires are arranged at proper positions in a workshop, such as a pit edge. If the submerged arc welding is carried out by a welding manipulator, the positions of the two pairs of rotating tires are in a working range of the welding manipulator. The two pairs of rotating tires support a rod head and a rod tail respectively; in the process of arranging the tires, a line is marked on the ground, and the tires are arranged on the same line; and the closing distance of the tires and the transverse distance between the tires are roughly adjusted according to the diameter of the rod head and the rod tail. Because two holes with phi of 100mm are formed inside a piston rod and cannot be directly welded, two steel tubes (serial number 7) (No.3 on a drawing) are arranged before welding to serve as base plates. The steel tubes are processed completely, and have the inner hole diameter phi of 100mm and wall thickness of 8mm. Due to comprehensive consideration, symmetrical U-shaped bevel welding is adopted, manual arc welding is adopted at the bottom, and after the steels tubes are covered, a common submerged arc welding is adopted. The solid shaft assembling and welding method solves the problem that solid shaft workpieces with smaller diameters are hardly assembled and welded, and has the advantages of excellent manufacturing technology, time and labor conservation, and guarantee of workpiece quality.

Description

technical field [0001] The invention relates to an assembly and welding method, in particular to a solid shaft assembly and welding method. Background technique [0002] At present, the solid shaft made by our company is the piston rod of the tension stretching machine. The total net weight is about 41 tons. A Ф100mm hole, plus the amount of processing, the diameter of the welding part is about 320mm. There are many factors of welding deformation for such a long shaft assembly, and it is very difficult. The prominent problems in the production of this type of workpiece are: the diameter of the shaft is large, and the welding workload is large. [0003] The total length of the shaft is large, so that both ends are easily deformed due to welding, resulting in a lack of processing, and the deformation is not easy to control. Contents of the invention [0004] The present invention solves the method of assembling, welding, process control and inspection of solid shafts, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/00B23K9/18B23K9/235B23K9/32
Inventor 张洪强
Owner CITIC HEAVY INDUSTRIES CO LTD