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Method for machining encircling hole with meridian plane group nozzle

A hole processing method and nozzle group technology, applied in metal processing equipment, metal processing machine parts, manufacturing tools, etc., can solve problems such as the impossibility of milling processing of girdle-shaped holes, improve the production level, improve work efficiency, Effects that are easy to achieve

Inactive Publication Date: 2010-09-15
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a numerical control milling machine is used to mill a belt-shaped hole, since the steam outlet edge R of the belt-shaped hole is only 1.2mm, and the diameter of the milling cutter is too small, it is impossible to realize the milling of the belt-shaped hole.

Method used

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  • Method for machining encircling hole with meridian plane group nozzle
  • Method for machining encircling hole with meridian plane group nozzle
  • Method for machining encircling hole with meridian plane group nozzle

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Embodiment Construction

[0017] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] like figure 2 Shown, this belt meridian surface nozzle group shroud type hole processing method, it comprises the following steps:

[0019] (a) The curved surface with meridian surface on the surrounding belt of the nozzle group is processed by CNC machine tool turning, and the curved surface with meridian surface on the surrounding belt of the nozzle group needs to be subjected to one rough machining, one finishing machining and one stress relief treatment respectively. The function is to prevent the processing deformation of the thin-walled whole ring parts. During the turning process, the turning chuck end should be given a sufficient margin. After all the machining dimensions such as the curved surfaces and inclinations are accurately turned, the width of the entire ring must be cut accurately. , which can ensure the machining ac...

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Abstract

The invention discloses a method for machining an encircling hole with a meridian plane group nozzle, which mainly comprises the following steps of: fixing the group nozzle on a rotatable locating ring with index locating holes, cutting the encircling hole through a wire cutting machine, and cutting the next encircling hole according to the pitch rotate locating ring of the encircling hole after each one encircling hole is cut. The method for machining the encircling hole with the meridian plane group nozzle adopts the wire cutting machine to cut the encircling holes and uses index locating holes on the locating ring for index location so as to ensure the machining accuracy. The method is convenient to realize, ensures the reliability and rationality in technology,g greatly improves the production levels of steam turbine nozzles, reduces the manufacturing cost of steam turbine and improves the work efficiency.

Description

technical field [0001] The invention relates to a method for processing a nozzle group shroud-shaped hole, in particular to a processing method for a nozzle group shroud-shaped hole provided with a meridian surface. Background technique [0002] The nozzle group is a common part of the steam turbine, and the nozzle group’s shroud is generally provided with a shroud-shaped hole. At present, the processing method of the nozzle group’s shroud-shaped hole mostly adopts graphite electrode electric pulse method or laser cutting processing method and CNC milling machine. Carry out milling and other methods. However, with the development of steam turbine technology, the nozzle group technology with meridian surface is mostly used for the nozzle group of large steam turbine. The structure of the nozzle group with meridian surface is as follows: figure 1 As shown, the nozzle group shroud 1 is a cylindrical structure, and the curved surface formed by the thicker end of the inner circl...

Claims

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Application Information

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IPC IPC(8): B23P17/00B23H9/14B23Q3/00
Inventor 蔡振铭
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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