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Trepanning sampling method of blind hole of ultralong deep hole

A blind hole and deep hole technology, applied in the sampling device and other directions, can solve problems such as small gaps

Inactive Publication Date: 2012-12-05
SHANGHAI HEAVY MACHINERY PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the technology of sampling the nesting material in the through hole is very mature, and for the nesting sampling of the deep hole blind hole, there is already a mandrel with a diameter d≤30mm in the blind hole with a diameter of D=90mm, that is D / d ≥ 3 method, but for deep hole blind hole nesting sampling with D / d ≤ 2, due to the small gap between the blind hole wall and the mandrel, there is no successful experience for reference.

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  • Trepanning sampling method of blind hole of ultralong deep hole
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  • Trepanning sampling method of blind hole of ultralong deep hole

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Embodiment Construction

[0022] The nesting sampling method of the ultra-long, deep and blind holes of the present invention can be used in such as figure 1 Nesting sampling is carried out in the ultra-long and deep blind holes of the ultra-supercritical rotor workpiece shown, wherein the aperture of the blind hole is D=120mm, the diameter of the core rod is d≥60mm, and the length of the core rod is 1500-4000mm.

[0023] The present invention performs nesting sampling in the super long deep blind hole through the following steps:

[0024] 1. Turn the shape of the ultra-supercritical rotor of the workpiece on a heavy-duty horizontal lathe, and then use a turning tool on the sampling end of the workpiece to create a shallow circular line at a diameter of 40mm, which is used as the center of the two M12 screw holes line;

[0025] 2. On the boring machine, drill and tap 2-M12 screw holes on a shallow circular line with a diameter of 40mm;

[0026] 3. The deep hole drilling and boring machine of the above model TD...

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Abstract

The invention discloses a trepanning sampling method of a blind hole of an ultralong deep hole, which can be used for taking a core rod with a hole diameter of 60 mm and a length of 1500-4000 mm out of a blind hole with a hole diameter of 120 mm and solving the problem of trepanning sampling of the blind hole of the ultralong deep hole of a super-critical generator. The trepanning sampling methodcomprises the following steps of: firstly, trepanning a blind hole of an ultralong deep hole with a hole diameter D and a core rod hole diameter d at the sampling end of a workpiece by using a trepanning drill rod; and secondly, installing a cut-off tool on the head of the trepanning drill rod, transporting the cut-off tool to the appointed blind hole deeply to carry out cut-off operation, and cutting the core rod off from the blind hole. The invention also discloses the cut-off tool for the trepanning sampling of the blind hole of the ultralong deep hole.

Description

Technical field [0001] The invention relates to a mechanical manufacturing method, in particular to a nesting sampling method of super long, deep and blind holes. Background technique [0002] The ultra-supercritical rotor is a key part of today's most advanced generator set, and the market demand is huge. Such as figure 1 As shown, in the manufacturing process of this kind of ultra-supercritical rotor, it is required to dig a core rod with a diameter d≥60mm and a length of 1500-4000mm in a blind hole with a diameter of D=120mm, that is, D / d≤2. The excavated mandrel is used as a sample for inspection to test the mechanical properties of the ultra-supercritical rotor. Therefore, how to take out the mandrel sample from the deep hole and blind hole is the key and important process for machining the ultra-supercritical rotor. . [0003] At present, the technology of nesting sampling in the through hole is very mature, and for the nesting sampling of the deep blind hole, there is alre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/04
Inventor 吕亚臣李友发陈大勇雷文潘昌平
Owner SHANGHAI HEAVY MACHINERY PLANT
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