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
CN101839818AInactive Publication Date: 2010-09-22SHANGHAI HEAVY MACHINERY PLANT
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI HEAVY MACHINERY PLANT
Publication Date
2010-09-22
Estimated Expiration
Not applicable Β· inactive patent

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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.
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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 dβ‰₯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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