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Ladder-shaped internal threaded hole processing method of steam turbine outer ring part

An internal thread hole and processing method technology, applied in metal processing equipment, tangent machines, manufacturing tools, etc., can solve the problems of low processing efficiency, complex processing, and easily damaged arc surfaces, and achieve high processing efficiency, easy processing, Efficiency-enhancing effect

Active Publication Date: 2013-01-02
HARBIN TURBINE +1
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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 in the processing of the trapezoidal internal thread hole of the outer ring parts of the steam turbine used in the existing power station, a single tap is used to drill holes, and there is interference between a single tap and the arc surface, which is easy to damage the processed arc surface, and Using multi-taper taps to process trapezoidal internal thread holes has the problems of complex processing and low processing efficiency, and then provides a method for processing trapezoidal internal thread holes in steam turbine outer ring parts

Method used

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  • Ladder-shaped internal threaded hole processing method of steam turbine outer ring part
  • Ladder-shaped internal threaded hole processing method of steam turbine outer ring part
  • Ladder-shaped internal threaded hole processing method of steam turbine outer ring part

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specific Embodiment approach 1

[0011] Specific implementation mode one: combine Figure 1-Figure 6 Describe this embodiment, the concrete steps of a kind of steam turbine outer ring part trapezoidal internal thread hole processing method of this embodiment are:

[0012] Step 1. The clamping and alignment of the outer ring parts, first remove the tool table of the lathe, and adjust the machining center of the trapezoidal threaded hole 1-1 to be processed on the upper end surface of the outer ring part 1 to be equal to the center of the chuck rotation , press the outer ring part 1 on the small pallet, align the trapezoidal threaded hole 1-1 to be processed, and press the outer ring part 1;

[0013] Step 2, drill the bottom hole, and drill a bottom hole with a diameter of D1 on the upper end surface of the outer ring part 1, and the diameter D1 is the small diameter of the trapezoidal internal thread hole 1-1 to be processed;

[0014] Step 3, thread turning of trapezoidal internal thread hole, remove the chuc...

specific Embodiment approach 2

[0021] Embodiment 2: In step 3 of this embodiment, the spindle speed of the lathe is 45 r / min. Such setting meets the design requirements and actual processing needs. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: In step 4 of this embodiment, the spindle speed of the lathe is 30 r / min. Such setting meets the design requirements and actual processing needs. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a ladder-shaped internal threaded hole processing method of a steam turbine outer ring part and relates to a processing method of the steam turbine outer ring part. The processing method solves the problems that in the ladder-shaped internal threaded hole processing process of the steam turbine outer ring part of the existing power station, a single screw tap is adopted for drilling, the interference between the single screw tap and the circular arc surface exists, the processed circular arc surface is easily damaged, the screw tap in the multi-cone structure is adopted for processing the ladder-shaped internal threaded hole, the processing complexity is caused, and the processing efficiency is low. The processing method has the main steps of 1, outer ring part installation and clamping alignment; 2, bottom hole drilling; 3, threaded turning of the ladder-shaped internal threaded hole; and 4, tolerance zone turning of the ladder-shaped internal threaded hole. The processing method is used for the processing of the ladder-shaped internal threaded hole of the steam turbine outer ring part.

Description

technical field [0001] The invention relates to a processing method for an outer ring part of a steam turbine, in particular to a processing method for a trapezoidal internal thread hole of the outer ring part of a steam turbine. Background technique [0002] An outer ring part used in steam turbines used in power stations has a large amount and a simple structure, but there are certain difficulties in processing the threaded holes on one end face. Under normal circumstances, after all the external shapes are processed, they are installed on the boring machine to drill and tap the thread. For the structure of the outer ring, such as figure 1 As shown, there is interference between the tap and the arc surface with a radius R of 269mm during drilling, and it is easy to damage the processed outer ring parts. In this way, higher requirements are put forward for the manufacture of the tap. However, if the tap is made into a multi-taper structure and the guide part at the front e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23G1/00
Inventor 陈永亮隋朝龙刘成斌张玮
Owner HARBIN TURBINE
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