Million-kilowatt nuclear turbine pedestal plate finish milling processing method

A steam turbine and base frame technology, which is applied in metal processing equipment, milling machine equipment, manufacturing tools, etc., can solve the problems of base frame plate flatness and surface quality processing accuracy, and achieve the effect of eliminating tool marks

Active Publication Date: 2014-10-22
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 of low machining accuracy of base plate flatness and surface quality in the prior art, and to provide a milling method for the base plate of a million nuclear power steam turbine, comprising the following steps:

Method used

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  • Million-kilowatt nuclear turbine pedestal plate finish milling processing method
  • Million-kilowatt nuclear turbine pedestal plate finish milling processing method
  • Million-kilowatt nuclear turbine pedestal plate finish milling processing method

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specific Embodiment approach 1

[0018] Specific implementation mode one: as figure 1 , figure 2 Shown, a kind of finishing milling processing method of the pedestal plate of a nuclear power steam turbine comprises the following steps:

[0019] Step 1. Install the milling cutter disc 1 on the machine tool spindle, place a dial gauge on the machine tool table with the gauge head up, and point the center of the milling cutter disc without inserts to the gauge head;

[0020] Step 2, move the milling cutter disc 1 along the X axis (the X axis refers to figure 2 As shown, the center line of the base plate (in the direction of O-O) moves to the position R from the center of the milling cutter disc, where R is the radius of the cutter body of the milling cutter disc, and the milling cutter disc 1 is not rotated by circular interpolation. Walk a full circle trajectory with a radius of R in the state of the state, and determine the high point position and the low point position on the circumferential direction of ...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 5, the difference between the high point position and the low point position of the milling cutter after inserting the blade can be directly measured by a laser detection device.

specific Embodiment approach 3

[0029] Specific embodiment three: the difference between this embodiment and specific embodiment one is: in step seven, when the step of receiving the knife appears at the junction of the two tool rails on the processing surface, use the spacer 3 to place the base plate 2 along the milling The direction of the line connecting the high point position and the low point position of the cutter head 1 is adjusted to a height parallel to the milling cutter head 1 .

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Abstract

The invention relates to a million-kilowatt nuclear turbine pedestal plate finish milling processing method in order to solve the problem of low processing precision of the flatness and the surface quality of pedestal plates in the prior art. The above processing method determines the inclination degree of a milling cutter disc through a dial gage, and processing the pedestal plate according to the inclination angle to eliminate lapping defects in order to solve the million-kilowatt nuclear turbine pedestal plate finish processing problem and make the flatness and the surface quality of the processed million-kilowatt nuclear turbine pedestal plate reach technical requirements.

Description

technical field [0001] The invention relates to a fine milling method for a base frame plate of a million nuclear power steam turbine. Background technique [0002] The planarity and surface quality of the base plate of a million-dollar nuclear power steam turbine are very high. When processing the upper and lower surfaces on a large gantry milling machine, due to the large size of the base plate, the milling cutter cannot be processed in one knife. It can only be like sweeping the floor. The processing of the entire base plate is completed in parallel-spaced tracks; at the same time, the fewer the number of tool tracks, the less the number of tool marks, and the better the processing effect. In this way, it is necessary to use a milling cutter with a diameter as large as possible, but if the milling cutter is large enough, the parallelism error between the end face of the main shaft (column) and the worktable will be enlarged. Generally, this error is caused by the non-perp...

Claims

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Application Information

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IPC IPC(8): B23C3/13
Inventor 张永刚高岩岳京田马桂君张大伟常海滨张久鑫王其江张德宇尤健安志伟孟阳
Owner HARBIN TURBINE
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