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Special fixture for processing inclined conical nozzle steam passage and method thereof

A special fixture and steam channel technology, which is applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc., can solve the problems of no inclined cone hole type nozzle steam channel, difficult centering of drill bits, etc., and achieves good results and guarantees The effect of high accuracy and positional precision

Inactive Publication Date: 2010-03-17
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that there is no special fixture for processing the air channel of the inclined cone hole type nozzle and the problem that the centering of the drill bit is difficult when processing the tapered hole of the nozzle air channel, and then provide an inclined cone hole type nozzle air channel The processing method and its special fixture

Method used

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  • Special fixture for processing inclined conical nozzle steam passage and method thereof
  • Special fixture for processing inclined conical nozzle steam passage and method thereof
  • Special fixture for processing inclined conical nozzle steam passage and method thereof

Examples

Experimental program
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specific Embodiment approach 1

[0018] Specific implementation mode one: as Figure 4 As shown, the special fixture for processing the steam channel of the inclined cone-hole nozzle in this embodiment includes a fixture bending plate 1, a central shaft 2, an indexing plate 3, a positioning mandrel 6, three surrounding pressure plates 7 and a central pressure plate 8. The fixture bending plate 1 and the indexing plate 3 are sequentially set on the central shaft 2, and the central axis 2 is fixed on the fixture bending plate 1 by bolts. The fixture bending plate 1 has a stepped through hole 1-1, and the indexing plate 3 There are twenty indexing through holes 3-1 along the circumferential direction, the center of the stepped through hole 1-1 and the center of the indexing through hole 3-1 are on the same circle, and the positioning mandrel 6 is inserted in the On the index plate 3, the central pressing plate 8 is fixed on one end of the central shaft 2, and the surrounding pressing plates 7 are fixed on the fi...

specific Embodiment approach 2

[0019] Specific implementation mode two: as Figure 4 As shown, the special fixture described in this embodiment further includes support ribs 10 , and the support ribs 10 are arranged in the corners 11 outside the clamp bending plate 1 . With such a design, the support rib 10 can improve the stability of the fixture bent plate 1 . Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0020] Specific implementation mode three: as Figure 4 As shown, the special fixture in this embodiment further includes a thrust bearing 12 , and the thrust bearing 12 is sleeved on the central shaft 2 . Such a design can reduce friction and make the index plate 3 rotate more briskly. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

A special fixture for processing an inclined conical nozzle steam passage and a method thereof relate to a fixture for processing the inclined conical nozzle steam passage and a method thereof. The invention solves the problem that at present, no special fixture for processing the inclined conical nozzle steam passage exists, and when a tapered hole of the nozzle steam passage is processed, a drilling bit is difficult to be centered. An indexing plate of the special fixture is provided with twenty indexing through holes along the periphery direction; the center of a stepped through hole and the center of the indexing through holes are on one periphery; a spotting spindle is mounted on the indexing plate in a plug-in manner; the processing method is as follows: using a milling cutter with diameter of 13mm to feed from a P point so as to process a plane C which is vertical to the central line of the tapered hole to be processed; and stopping feeding when the milling cutter mills to a Q point, wherein the center of a hole pitch circle having diameter of 13mm and milled by the milling cutter is the core-bit of the drilling bit. The special fixture solves the problem that at present, nospecial fixture for processing the inclined conical nozzle steam passage exists; and the inclined conical hole of the nozzle stream passage processed by the method has high position accuracy.

Description

technical field [0001] The invention relates to a special fixture for processing the nozzle steam passage and a method for processing the nozzle steam passage by using the special fixture. Background technique [0002] The nozzle is an important part of the steam turbine, and the machining accuracy of the nozzle steam passage on the nozzle directly affects the operating efficiency of the steam turbine unit. The structure of the oblique cone hole nozzle is composed of four groups of nozzle blocks with the same inner and outer circle size and the same nozzle structure, but the number of nozzle air passages and fan angles are different. The nozzle air passage is composed of oblique cone hole and mm slope holes are connected, see figure 1 with figure 2 As shown, due to the complex position of the nozzle steam channel and the high precision requirement of the nozzle steam channel, it is very difficult to process the nozzle. The whole nozzle is composed of four groups of nozz...

Claims

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Application Information

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IPC IPC(8): B23Q3/06B23Q16/02B23P15/16
Inventor 朱德强杨兴永来庆秀
Owner HARBIN TURBINE
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