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Assembly welding process for propeller shaft bracket

A stern shaft frame and assembly and welding technology, which is applied in the field of ships, can solve the problems of affecting the service life of the ship, the process is not in place, and the accuracy of the stern shaft frame assembly and welding is poor, so as to avoid pyrotechnic correction, broad market space, and small position deviation Effect

Inactive Publication Date: 2012-01-04
YANGFAN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] What the present invention aims to solve is that the existing stern shaft frame has poor assembly and welding accuracy, and the process is not in place, which affects the service life of the ship.

Method used

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  • Assembly welding process for propeller shaft bracket
  • Assembly welding process for propeller shaft bracket
  • Assembly welding process for propeller shaft bracket

Examples

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, take kiloton class boat crossing 10 as embodiment to illustrate.

[0024] A stern shaft frame assembly and welding process comprises the following process steps:

[0025] A. The width of the stern shaft hub 2 is selected as 750mm, and a 0.2Mpa water pressure test should be done before assembly. Then align the deflection angles of the two supports according to the figure, and then calibrate the axes and apertures of the front and rear end surfaces of the stern hub 2, and then make temporary marks on each of four points on the left, right, up, and down.

[0026] B. According to the figure, take the center line CL as the center line, and BL as the horizontal line. Arrange the welding of the stern shaft frame at the bottom of the hull 7. The left and right sides are symmetrical. Measure the bottom plate of the hull and install the support arm 1 and cross arm 3 on the rib plate 6. position, and cut out corresponding position h...

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Abstract

The invention relates to an assembly welding process for a propeller shaft bracket, and belongs to the technical field of ships. The process comprises the following steps of: before assembling a propeller shaft hub, performing a hydrostatic test of 0.2 MPa; correcting axes and pore diameters of front and rear end faces of the propeller shaft hub and sizes of four points on the left and right sides and upper and lower sides of the propeller shaft hub, and marking temporarily; cutting corresponding position holes on a bottom board and rib board of a ship body, and machining beveled edges of a supporting arm and the propeller shaft hub to perform point welding pre-positioning connection; allowing transverse arms in the horizontal direction to form an included angle alpha of 85 degrees with the supporting arm, splicing the supporting arm and the propeller shaft hub on a moulding bed in advance, and inserting into an open pore of the bottom board of the ship body to perform pre-welding positioning; after the supporting arm and the transverse arms are pre-positioned, welding and positioning the transverse arms and the propeller shaft hub according to a shafting bracing wire; and after welding, performing ultrasonic detection and magnetic particle detection on the propeller shaft bracket. The propeller shaft bracket assembled by the process is small in positional deviation and vibration quantity and low in noise, and the service life of the ships is prolonged greatly.

Description

technical field [0001] The invention relates to a welding process for a stern shaft frame, in particular to a welding process suitable for a thousand-ton ship, and belongs to the technical field of ships. Background technique [0002] Anyone who has been on the thousand-ton ships currently in use, such as tugboats, passenger ferries, and ocean-going fishing boats, knows that most of the ships are very noisy and shake a lot, which is due to the installation position of the stern shaft frame. Deviations occur and the welding process is not in place, which causes the main shaft to vibrate during operation. Such a structure will not only produce a lot of vibration and noise, but also greatly reduce the service life of the ship, which is an urgent problem to be solved. Contents of the invention [0003] The purpose of the present invention is to provide a stern shaft frame welding process. [0004] What the present invention aims to solve is that the existing stern shaft frame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/00B23K37/00C21D9/50
Inventor 刘在良
Owner YANGFAN GROUP
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