Method for processing deep hole of sleeve of steam turbine by using stepped reamer

A step type, steam turbine technology, applied in the direction of reamers, reaming devices, metal processing equipment, etc., can solve the problems of cutting and removing difficulties, easy deflection and vibration of the sleeve, and scratches on the processed surface, etc., to prevent The effect of scratching the processed surface, low manufacturing cost and simple structure

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

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems that the sleeve is easy to deviate and vibrate, the cutting and removal is difficult, the machined surface will be scratched and the cutt

Method used

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  • Method for processing deep hole of sleeve of steam turbine by using stepped reamer
  • Method for processing deep hole of sleeve of steam turbine by using stepped reamer
  • Method for processing deep hole of sleeve of steam turbine by using stepped reamer

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specific Embodiment approach 1

[0030] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this implementation mode, this implementation mode is realized through the following steps:

[0031] Step 1, blanking: select profile alloy steel round bar, length 398mm, diameter Ф95mm;

[0032] Step 2. The inner hole, outer circle and both ends of the first rough turning sleeve 1: leave 3mm allowance on the radius of the inner hole; leave 3mm allowance on the radius of each section of the outer circle; turn the two ends, Leave a margin of 3mm for each;

[0033] Step 3, Quenching and tempering: Carry out quenching and tempering treatment on the sleeve 1; Quenching and tempering treatment refers to high-temperature tempering treatment after quenching, and the high-temperature tempering temperature is between 500°C and 650°C;

[0034] Step 4. The inner hole, outer circle and both ends of the sleeve 1 for the second rough turning: leave 1.5mm allowance on the radius of the inner hole; leave 1.5mm a...

specific Embodiment approach 2

[0046] Specific implementation mode two: combination figure 1 and figure 2 Describe this embodiment, this embodiment is that in step seven, the reamer starts to move the knife from the end face of the end of the inner hole, and first reams out a length of 12mm. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0047] Specific implementation mode three: combination figure 1 and figure 2 Describe this embodiment, this embodiment is the feed speed s=0.16mm / r of the reamer in step 7. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for processing a deep hole of a sleeve of a steam turbine by using a stepped reamer, and relates to a processing method for a deep hole of a sleeve. The method solves the problems that the sleeve has high possibility of deviation and vibration, the cutting elimination is difficult, the processed surface can be scratched and a cutter has high possibility of tipping when the deep hole of the sleeve of the existing steam turbine is processed. The method comprises the following steps: 1, discharging; 2, roughly turning an inner hole, an outer circle and both end surfaces of the sleeve for the first time; 3, quenching the sleeve; 4, roughly turning the inner hole, the outer circle and the both end surfaces of the sleeve for the second time; 5, tempering the sleeve; 6, finely turning the inner hole, the outer circle and the both end surfaces of the sleeve; 7, processing the inner hole of the sleeve on a lathe by using the stepped reamer; 8, grinding the inner hole of the sleeve; 9, drawing a hole line on the processing position of a radial hole; 10, drilling the radial hole; 11, milling the radial hole; 12, nitriding; 13, finely grinding the inner hole of the sleeve; 14, finely grinding the outer circle of the sleeve to complete the process of the deep hole of the sleeve of the steam turbine. The method is used for processing the deep hole of the sleeve of the steam turbine.

Description

technical field [0001] The invention relates to a method for processing the deep hole of a sleeve, in particular to a method for processing the deep hole of a steam turbine sleeve by using a stepped reamer. Background technique [0002] A hole whose length-to-diameter ratio is greater than 5 is called a deep hole. Deep hole processing is more difficult than general hole processing. There are a certain number of long sleeves in the steam turbine adjustment sleeve, such as figure 1 , not only the hole depth (L / D≈12), but also the high precision and surface roughness requirements. Due to the long parts, the method of "one clamp and one support" (that is, one end of the workpiece is clamped with a chuck, and the other end of the workpiece is supported by a center frame) is often used for deep hole processing. The deep hole processed by this method The following problems generally exist: (1) When deep hole machining, the axis of the hole is easy to be skewed. This is because t...

Claims

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Application Information

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IPC IPC(8): B23P15/00B23D75/00B23D77/00
CPCB23P15/00B23D75/00B23D77/00
Inventor 陈永亮张彦成国富王淑琴赵军
Owner HARBIN TURBINE
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