Numerical control machining method for diamond blade with crown

A processing method and rhombus technology, applied in the field of CNC machining with its own crown rhombus blade, can solve the problems of low machining accuracy and low machining efficiency, and achieve the effects of improving machining efficiency and accuracy, saving tools, and improving consistency

Pending Publication Date: 2022-03-25
HARBIN TURBINE +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low processing efficiency and low processing precision in the existing processing method of rhombus blade with crown, and to provide a numerical control processing method for rhombus blade with crown

Method used

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  • Numerical control machining method for diamond blade with crown

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Embodiment 1

[0019] Combine below figure 1 Illustrate the present embodiment, a kind of numerical control processing method of own crown rhombus blade described in the present embodiment, it comprises:

[0020] Machining of the transfer surface on the steam inlet side of the bulk head: positioning with the steam outlet side and the back radial direction, with the steam inlet side facing upwards, and milling the transfer surface of the steam inlet side of the bulk head with a fixed profile;

[0021] Processing of the transfer surface on the steam inlet side of the small head: the inner radial face of the blade is positioned downwards, and a margin of 5mm height is removed at the back radial of the steam inlet side of the big head and the steam inlet side of the small head, and then the steam inlet side of the small head is rotated. Fixed profile milling at interface;

[0022] Machining of the steam channel: Use small ball-end cutters to partially mill the two ends of the steam channel, and...

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Abstract

The invention discloses a numerical control machining method for a rhombic blade with a crown, belongs to the technical field of machining and manufacturing of steam turbines, and aims to solve the problems of low machining efficiency and low machining precision of an existing machining operation method for the rhombic blade with the crown. The method comprises the following steps of: processing a large-head steam inlet side adapter surface: positioning in a steam outlet side and a back radial direction, enabling a steam inlet side to face upwards, and milling a fixed outline of the large-head steam inlet side adapter surface; the inner radial faces of the blades are positioned downwards, the allowance of 5 mm height is removed from the back radial positions of the large-head steam inlet side and the small-head steam inlet side, and then fixed contour milling is conducted on the small-head steam inlet side adapting face; the two ends of the steam passage are locally milled through a small ball head cutter, and the middle of the steam passage is completely milled. The method is used for carrying out numerical control machining on the diamond blade with the crown.

Description

technical field [0001] The invention relates to a numerically controlled machining method for diamond-shaped blades with crowns, and belongs to the technical field of steam turbine machining and manufacturing. Background technique [0002] With the wide application of large-scale numerical control machine tools, the design and processing method of the stator vane of the steam turbine diaphragm has been gradually improved from the original shroud punching welding to the welding of the stator blade with its own shroud (self-contained crown). [0003] The 496 steam turbine unit comes with diamond crown blades, which have the problems of small steam passage, large axial dimension, and large rhombus angle, which in turn causes the steam passage transition surface to have a wide chord and a large arc drop, and the steam passage transition surface is a conical surface. Bring great difficulty to processing. [0004] In the past, on ordinary CNC milling machines with self-contained ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/00
CPCB23C3/00
Inventor 牟先红刘蓉闫原车德健张宇航杨佳财齐琳倩张卓然焦子虎董志峰
Owner HARBIN TURBINE
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