Giant non-standard trapezoidal thread processing method

A trapezoidal thread and processing method technology, applied in the direction of electrical program control, digital control, etc., can solve problems such as no way to find, achieve the effect of improving processing quality and precision, and improving processing production efficiency

Active Publication Date: 2008-09-17
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In foreign countries, this processing technology is co

Method used

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  • Giant non-standard trapezoidal thread processing method
  • Giant non-standard trapezoidal thread processing method
  • Giant non-standard trapezoidal thread processing method

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[0035] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0036] See figure 1 , The cross section of the S2099×P50 giant non-standard trapezoidal thread to be processed in this embodiment is approximately right-angled trapezoid, the entire thread pitch is 50mm, the tooth depth is 22mm, and consists of 9 line segments, see figure 1 The specific parameters are: the first line segment 1 is a convex arc of R10, the second line segment 2 is a line segment of 22.5 degrees, the third line segment 3 is a convex arc of R4, and the fourth line segment 4 is a line segment of 35.25 degrees. , The fifth line segment 5 is a concave arc of R10, the sixth line segment 6 is a line segment of 90 degrees, the seventh line segment 7 is a concave arc of R4, the eighth line segment 8 is a line segment of 0 degrees, and the ninth line segment 9 is a line segment of R4 Convex arc; except for the seventh line segment 7 and the eighth line s...

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Abstract

The invention relates to a processing method of high-pressure exterior cylinder component of million grade super critical steam turbine, especially to a processing method of S2099*P50 giant nonstandard trapezoidal thread. A processing method of giant nonstandard trapezoidal thread uses a numerically controlled machine to execute processing, which is carried out according to the following sequences: executing mathematics modeling to the screw thread type wire; using coarse and fine processing methods, determining suitable radius lathe cutters respectively adopted by the coarse and fine processing methods according to required processing wire and required surface accuracy and roughness concentration, and determining suitable deepness allowance of the line face after the coarse processing; determining the coarse processing lathe cutter center track area and the fine processing lathe cutter center track area, and modeling for the cutter center track boundary; determining spacing of every layer during processing and spacing of every cutter in a same layer according to the material to be cut, the selected cutter, machine performance and cutting position; programming the coarse and fine processing lathe cutter walking procedure; and executing the process according to the programmed procedure. The inventive processing method has high process efficiency and high machine precision.

Description

technical field [0001] The invention relates to a processing method for a high-pressure outer cylinder component of a million-level ultra-supercritical steam turbine, in particular to a processing method for S2099×P50 giant non-standard trapezoidal threads. Background technique [0002] S2099×P50 giant non-standard trapezoidal internal thread is located in the inner circle of φ2055mm on the third step of the inner circle of the inlet end of the high-pressure outer cylinder of a million-level ultra-supercritical steam turbine. The vertical end face is 275mm. When assembling, there is a φ2095mm high-pressure threaded ring to match it, which plays a role in fixing the high-pressure inner cylinder in the steam inlet end of the high-pressure outer cylinder. [0003] Different from ordinary equilateral triangular thread and KUN301.04 zigzag thread, the cross section of S2099×P50 giant non-standard thread is approximately right-angled trapezoidal, the bottom diameter of the intern...

Claims

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Application Information

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IPC IPC(8): G05B19/18
Inventor 辛健
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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