Machining method for online measurement and compensation of high-precision blade

A processing method and high-precision technology, applied in instruments, computer control, simulators, etc., can solve problems such as measurement errors, and achieve the effect of improving processing qualification rate, processing efficiency and measurement accuracy

Inactive Publication Date: 2011-08-10
WUXI TURBINE BLADE
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Problems solved by technology

[0003] In view of the above problems, the present invention provides a high-precision blade online measurement and compensation processing method, which can effectively solve the problem of measurement error caused by manual measurement and adjustment deviation in the past, and can improve the stability and efficiency of blade size processing, and improve the rhombus squareness. Qualification rate of five-axis machining of steel blades

Method used

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  • Machining method for online measurement and compensation of high-precision blade
  • Machining method for online measurement and compensation of high-precision blade

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Embodiment

[0018] The size of both sides of the crown of a square steel blade is 35mm±0.03, and the size of the sides of the blade root is 40mm 0 -0.05 , the tolerance of the radial pitch of the blade shroud and the radial pitch of the blade root is +0.04mm~-0.02mm; during semi-finishing milling, it is processed according to the procedure of 0.2mm for one side, and the four sides of the blade shroud are used The φ20 face milling cutter is used for processing, and the four sides of the blade root are processed with a φ63 face milling cutter; after processing, online measurement is carried out according to the program, and the actual size value after semi-finishing milling is obtained at this time: the size of the two sides of the blade crown is 35.43mm (theoretical value should be 35.4mm), the size of both sides of the blade root is 40.45 (theoretical value should be 40.4mm), two compensation values ​​can be obtained after comparing the online measurement program with the theoretical valu...

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Abstract

The invention provides a machining method for online measurement and compensation of a high-precision blade, which can effectively solve the problem of measurement errors caused by regulating the errors through manual measurement and also can improve machining stability and efficiency of the blade size and improve five-axis machining acceptability of a diamond-shaped square steel blade. The method comprises the steps of: (1) setting online measurement parameters during programming; (2) conducting semi- finish milling for four sides of a root and a shroud of the blade, with single-side allowance of 0.2mm; (3) after completing the semi-finish milling, conducting online measurement respectively over both side surfaces of the root and both side surfaces of the shroud of the blade with a machine tool measuring head, calculating the deviation between the online measured value and the theoretical value set in measurement program to obtain a single-side deviation value, namely a compensation value of a cutter; (4) conducting finish milling for the blade by the machine tool, and during machining, regulating the corresponding cutter length via a program by respectively using the compensation values of the cutter, which respectively correspond to the root and the shroud of the blade, and controlling the finish milling of two side surfaces and two radial surfaces of the root and the shroud of the blade.

Description

technical field [0001] The invention relates to the field of numerical control machining methods for blades, in particular to a high-precision online measurement and compensation processing method for blades. Background technique [0002] The blades of diamond-shaped square steel at all levels are similar in shape and small in size. Generally, square blanks are directly processed on a five-axis machine tool at one time. Although the shape of this type of blade is relatively simple to process, its multiple dimensional accuracy requirements are relatively high: this type The dimensional tolerance of both sides of the root of the square steel blade is 0~-0.05mm, the pitch dimensional tolerance of the radial plane of the root and the shroud is +0.04mm~-0.02mm, and its processing requires three steps from the root to the shroud. The radial surface pitch size should be gradually increased, and the increasing trend must be within 0.01mm. This not only requires the five-axis machine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/404G05B19/402
Inventor 张渊张家军徐进滕树新
Owner WUXI TURBINE BLADE
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