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Machining method for preventing inclined hole drilling of marine screw shaft 22 m long

A processing method and stern shaft technology, which are applied in the processing field of 22m long ship stern shaft anti-drilling drilling, can solve the problems of drilling deviation, difficult drilling deviation, short length, etc., to prevent the drilling deviation and deep drilling. The effect of uniform hole wall thickness

Active Publication Date: 2016-08-24
南通德玛瑞机械制造有限公司
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Problems solved by technology

[0002] At present, the length of the stern shaft of the same type of ship in China is generally about 12000mm, that is, the aspect ratio is about 28. At present, some ships need to use a stern shaft with a length of about 22000mm. It has the following defects: the traditional stern shaft processing is relatively short in length, and the drilling hole is not easy to deflect, while the 22-meter long shaft will cause the drilling hole to be greatly deflected due to the cutting force and the gravity of the drill pipe. The risk of scrapping is several times more difficult than traditional stern shaft processing

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  • Machining method for preventing inclined hole drilling of marine screw shaft 22 m long

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Embodiment Construction

[0019] The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the described examples.

[0020] The processing method of the anti-hole drilling deflection of the stern shaft of the 22m long ship in the present invention is realized through the following steps:

[0021] The first step, the stern shaft is fixed: first, the stern shaft 8 to be processed is fixed on the boring machine, such as figure 1 As shown, the boring machine includes a boring machine pull bar 6, and a guide bar 4 is installed at the front end of the boring machine pull bar 6, by setting the guide bar 4, it can be guided when boring, and at the front end of the boring machine pull bar 6 The middle position is equipped with a shockproof sleeve 5, through the setting of the shockproof sleeve 5, the bouncing phenomenon of the boring machine pull rod 6 can be avoided when the boring is pulled. The...

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Abstract

The invention relates to a machining method for preventing inclined hole drilling of a marine screw shaft 22 m long. The method comprises the steps that firstly, the screw shaft to be machined is fixed to a boring machine; then a guide hole with the depth of 120 mm is bored in the shaft end of the screw shaft through the boring machine; no floating blade is mounted on a boring machine pull rod at first, then the boring machine drives the boring machine pull rod to advance in an idle mode once, and it is confirmed that the boring machine pull rod can smoothly pass through the deep hole of the screw shaft; after it is confirmed that the boring machine pull rod can smoothly pass through the deep hole of the screw shaft, the floating blade is mounted on the boring machine pull rod, formal boring is started, the middle section of the screw shaft sinks for 1 mm in the boring process, and the parallelism of the axis of the boring machine pull rod and the axis of the screw shaft is within 0.5 mm. The machining method has the advantages that the middle section of the screw shaft sinks for 1 mm, it is ensured that the parallelism of the axis of the boring machine pull rod and the axis of the screw shaft is within 0.5 mm, and therefore it can be ensured that the phenomenon of inclined hole drilling is effectively avoided in the boring process.

Description

technical field [0001] The invention relates to the field of shipbuilding, in particular to a processing method for preventing hole drilling deviation of a stern shaft of a 22m long ship. Background technique [0002] At present, the length of the stern shaft of the same type of ship in China is generally about 12000mm, that is, the aspect ratio is about 28. At present, some ships need to use a stern shaft with a length of about 22000mm. It has the following defects: the traditional stern shaft processing is relatively short in length, and the drilling hole is not easy to deflect, while the 22-meter long shaft will cause the drilling hole to be greatly deflected due to the cutting force and the gravity of the drill pipe. The risk of scrapping is several times more difficult than traditional stern shaft machining. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a stern shaft anti-drilling processing method for a ...

Claims

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Application Information

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IPC IPC(8): B23B35/00
CPCB23B35/00
Inventor 沈辉赵永柏
Owner 南通德玛瑞机械制造有限公司
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