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Method of processing steam turbine control valve long thin-wall sleeve by utilizing support device

A technology of supporting device and thin-walled sleeve, which is used in metal processing mechanical parts, positioning devices, clamping devices, etc., can solve the problems of cylindricity not meeting the requirements of drawings, poor control of dimensional tolerances, and increasing cutting processes. The effect of easy control of dimensional tolerance, simple structure and low manufacturing cost

Active Publication Date: 2014-07-30
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention solves the problem that the long thin-walled sleeve on the high-pressure control valve of the steam turbine is processed on a horizontal lathe, the sleeve is easily deformed, the dimensional tolerance is not easy to control, and the cylindricity does not meet the requirements of the drawing, resulting in high scrap rate and increased cutting process problem, and then provide a method for processing the long and thin-walled sleeve of the steam turbine control valve by using the supporting device

Method used

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  • Method of processing steam turbine control valve long thin-wall sleeve by utilizing support device
  • Method of processing steam turbine control valve long thin-wall sleeve by utilizing support device
  • Method of processing steam turbine control valve long thin-wall sleeve by utilizing support device

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specific Embodiment approach 1

[0023] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this implementation mode, this implementation mode is realized through the following steps:

[0024] Step 1. Machining the central hole 10-1 of the long thin-walled sleeve 10: use a drilling machine to process the central hole 10-1 of the blank of the long thin-walled sleeve 10, and then process the central hole 10-1 by turning or boring to reach the drawing size request, see figure 1 ;

[0025] Step 2. Install the supporting device for turning the long and thin-walled sleeve: place the stepped shaft 1 in the central hole 10-1, and the middle section 1-3 of the stepped shaft 1 and the central hole 10-1 have 0-0.05mm interference Cooperate, the left washer 3 and the left nut 2 limit the axial degree of freedom of the left end of the long thin-walled sleeve 10, the stop ring 4, the right washer 5 and the first right nut 6 limit the axial degree of freedom of the right end of the long thin-walled sl...

specific Embodiment approach 2

[0029] Specific implementation mode two: combination figure 2 Describe this embodiment. In this embodiment, the interference fit between the middle section 1-3 of the stepped shaft 1 and the center hole 10-1 in step 2 is 0.01 mm. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific implementation mode three: combination figure 2 Describe this embodiment. In this embodiment, the interference fit between the middle section 1-3 of the stepped shaft 1 and the central hole 10-1 in step 2 is 0.02mm. Other steps are the same as in the first embodiment.

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Abstract

The invention discloses a method of processing a steam turbine control valve long thin-wall sleeve by utilizing a support device and relates to a thin-wall sleeve processing method used for solving the problems that the existing steam turbine high pressure control valve long thin-wall sleeve is directly processed on a horizontal lathe, the sleeve is easy to deform, the dimensional tolerance is not easy to control, and the cylindricity cannot reach a drawing requirement. The method comprises the steps that 1, a central hole of the long thin-wall sleeve is processed; 2, the support device is mounted: a stepped shaft is arranged in the central hole; 0-0.05 mm interference fit is formed between the middle section of the stepped shaft and the central hole, a left washer and a left nut limit the axial freedom degree of the left end of the long thin-wall sleeve, a baffle ring, a right washer and a first right nut limit the axial freedom degree of the right end of the long thin-wall sleeve, and the left nut and the right washer are screwed down; 3, the external diameter of the long thin-wall sleeve is processed by utilizing the horizontal lathe; 4, the support device which is used for turning and processing the long thin-wall sleeve is detached; 5, the long thin-wall sleeve is detached by an auxiliary detachment device. The method is used for processing the steam turbine control valve long thin-wall sleeve.

Description

technical field [0001] The invention relates to a method for processing a thin-walled sleeve, in particular to a method for processing a long thin-walled sleeve of a steam turbine control valve by using a supporting device. Background technique [0002] The structure of the high-pressure control valve and medium-pressure control valve of the steam turbine is relatively complicated, and the components of the control valve are various, and the components include many long and thin-walled sleeves. The outer diameter of the existing long thin-walled sleeve is directly processed on a horizontal lathe. Because the tube wall of the sleeve is very thin, some wall thickness is only about 7 mm. The center hole 10-1 of the center hole has a machining allowance, and it is necessary to reserve a solid cutting section on the sleeve at the chuck end of the horizontal lathe. The chuck jaws clamp the cutting section, and the inner hole of the thin-walled sleeve 10 , After the outer diameter...

Claims

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Application Information

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IPC IPC(8): B23P13/02B23B25/00B23Q3/00B25B27/02
CPCB23B25/00B23P13/02B23Q3/00B23Q2703/10
Inventor 高岩罗小明李冬羽马铭阳金沙于珊张久鑫常海滨王其江张德宇
Owner HARBIN TURBINE
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