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Trepanning sampling method of blind hole of ultralong deep hole and cut-off tool

A technology for cutting tools and blind holes, which is applied to sampling devices and other directions, and can solve problems such as small gaps

Inactive Publication Date: 2010-09-22
SHANGHAI HEAVY MACHINERY PLANT
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  • 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 and cut-off tool
  • Trepanning sampling method of blind hole of ultralong deep hole and cut-off tool

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Embodiment Construction

[0027] The nesting sampling method of super long deep hole blind hole of the present invention can be used in such as figure 1 The nesting sampling is carried out in the ultra-long deep hole blind hole of the ultra-supercritical rotor workpiece shown, wherein the blind hole diameter D=120mm, the mandrel diameter d≥60mm, and the mandrel length is 1500-4000mm.

[0028] The present invention carries out nesting sampling in the ultra-long deep hole blind hole through the following steps:

[0029] 1. Turn the shape of the ultra-supercritical rotor of the workpiece on a heavy-duty horizontal lathe, and then use a turning tool to draw a shallow circular line with a diameter of 40mm on the sampling end of the workpiece. The shallow circular line is used as the center of the two M12 screw holes Wire;

[0030] 2. On the drilling and boring machine, drill and tap 2-M12 screw holes on a shallow circular line with a diameter of 40mm;

[0031] 3. For the deep hole drilling and boring mach...

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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 sampling method for super-long deep hole blind holes. The invention also relates to a cutting tool used for sampling super-long deep hole blind hole nesting. Background technique [0002] Ultra-supercritical rotors are key components in today's most advanced generator sets and are in great demand in the market. Such as figure 1 As shown, during the manufacturing process of this ultra-supercritical rotor, it is required to excavate a mandrel 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 in the deep hole blind hole is the key and important process of ultra-supercritical rotor machining. . [0003] At present, the technology of nesting sampli...

Claims

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Application Information

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Patent Type & Authority Applications(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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