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Process for machining L-shaped angular ring

A technology of corner rings and process rings, which is applied in the field of manufacturing connecting parts, that is, L-shaped corner rings, can solve the problems of difficulty in ensuring dimensional accuracy and easy deformation, and achieve the effects of convenient application, increased strength, and improved processing quality

Active Publication Date: 2012-05-23
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the welding and processing of such parts are easily deformed, and the dimensional accuracy is difficult to guarantee

Method used

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  • Process for machining L-shaped angular ring
  • Process for machining L-shaped angular ring
  • Process for machining L-shaped angular ring

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Embodiment Construction

[0019] In order to better understand the technical solution of the present invention, it will be described in detail below through specific embodiments in conjunction with the accompanying drawings:

[0020] see figure 2 , the height of the L-shaped corner ring 1 is B, the inner diameter is D11, the outer diameter is D12, the outer diameter of the horizontal portion 10 is D13, the width K10=D13-D11 of the horizontal portion 10, and the thickness of the horizontal portion 10 is a. Stelling alloys 11, 12, and 13 are surfacing at three places on the inner circumference of the L-shaped angle ring 1, and Stelling alloy 14 is surfacing at one place on the lower bottom surface of the horizontal portion 10 of the L-shaped angle ring 1.

[0021] see again Figure 3a and Figure 3b , a kind of anti-deformation process ring 2 for processing L-shaped corner rings of the present invention, it is a circular ring with an effective thickness and a mounting hole 20 in the center, one surfa...

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Abstract

The invention discloses a process for machining an L-shaped angular ring as a connecting part between the high-pressure inner cylinder of a steam turbine and the primary static blade ring of the high-pressure cylinder. The process comprises the following steps: selecting a blank piece; installing and welding; rough machining; surfacing Stellite alloy; carrying out destressing thermal treatment; finish machining; removing the vestigial parts from the blank piece; and cutting the blank piece into the finished product of the L-shaped angular ring. According to the technical scheme of the invention, the blank piece of the L-shaped angular ring is firstly welded on the anti-deformation process ring to increase the strength of the L-shaped angular ring and reduce the deformation generated when the Stellite alloy is surfaced; and then, the blank piece thereof is further machined and formed and the Stellite alloy is surfaced to reliably guarantee the welding deformation of the L-shaped angular ring and improve the machining quality thereof, thus effectively guaranteeing the requirements for the design and quality of the product and solving the problem of the machining accuracy and machining quality of the process thereof.

Description

technical field [0001] The invention relates to a manufacturing method of an L-shaped angle ring, which is a connecting part between a high-pressure inner cylinder of a steam turbine and a first-stage vane ring of the high-pressure cylinder. Background technique [0002] The L-shaped angle ring 1 is the connecting part between the high-pressure inner cylinder 5 of the steam turbine and the first-stage vane ring 6 of the high-pressure cylinder. (see attached figure 1 ). The L-shaped corner ring 1 is characterized by large outer diameter, small difference between inner and outer diameters, thin thickness, small surface roughness Ra value, high mutual position accuracy requirements, and four places need to be welded with Stellite alloy. Stellite alloy is characterized by high wear resistance, excellent high temperature strength and corrosion resistance. For this reason, it is very easy to deform in the welding and processing of this type of parts, and the dimensional accurac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K37/04B23P23/00
Inventor 蔡振铭刘敏
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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