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Compound milling cutter for machining fir tree type blade root wheel groove

A technology of fir tree type and milling cutter, which is applied in the direction of milling cutter, metal processing equipment, manufacturing tools, etc., can solve the problems of low processing efficiency, high tool cost, difficult to guarantee accuracy, etc., to improve production efficiency, reduce contact area, Effect of reducing cutting heat

Inactive Publication Date: 2010-08-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The processing of rotor grooves in steam turbine manufacturing has always been a bottleneck in production, mainly manifested in low processing efficiency, difficulty in ensuring accuracy, and high cost of tools

Method used

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  • Compound milling cutter for machining fir tree type blade root wheel groove
  • Compound milling cutter for machining fir tree type blade root wheel groove
  • Compound milling cutter for machining fir tree type blade root wheel groove

Examples

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Embodiment Construction

[0019] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0020] like figure 1 As shown, this embodiment includes: a handle 1 and a cutting part 2, wherein: the end of the handle 1 fixes the cutting part 2, and the handle 1 is provided with an M16 threaded hole for fixing the cutting part 2.

[0021] The cutting part 2 is provided with four helical grooves 3 and four cutting edges 4 , wherein: the helical grooves 3 are helically arranged on the cutting edges 4 and extend from the tip of the cutting part 2 to the top of the shank 1 .

[0022] like figure 2 As shown, the cutting part 2 is conical, the apex of the cone points to the tool tip, the cutting edge 4 is divided...

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Abstract

The invention related to a compound milling cutter for machining a fir tree type blade root wheel groove, which belongs to the technical field of machinery manufacture. The compound milling cutter comprises a shank part and a cutting part, wherein the tail end of the shank part is fixed with the cutting part, and a spiral groove and a cutting edge are arranged on the cutting part; the spiral groove is spirally arranged on the cutting edge, and a spiral angle is greater than 5 DEG but less than 10 DEG. In the invention, a V-shaped rough milling cutter, a deepen milling cutter and a semi-finish cutter in an original process are combined through optimum design of the cutting edge, rough machining and semi-finish machining of a supercritical steam turbine of 1000MW are completed, tooling and cutter changing time is reduced, and the cutting speed and the feed rate are increased so that the productivity is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a cutting tool in the technical field of mechanical manufacturing, in particular to a compound milling cutter for machining fir-tree-shaped blade root grooves of 1000MW steam turbine rotors. Background technique [0002] The processing of rotor grooves in steam turbine manufacturing has always been a bottleneck in production, mainly manifested in low processing efficiency, difficulty in ensuring accuracy, and high tool costs. The processing quality and processing efficiency of the wheel groove depend on the machine tool and cutting tool and its process technology. The structure of the rotor groove corresponds to the structure of the blade root, which varies with the capacity of the single machine, and there are T-type, fungus-type, fork-type and fir-tree-type, etc. Among them, the fir tree-shaped wheel groove structure has a high bearing capacity, and the number of teeth on both sides of the wheel groove can be selected accord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C5/10B23C5/12
Inventor 陈明李军利励政伟安庆龙刘钢
Owner SHANGHAI JIAO TONG UNIV
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