Threaded hole processing method with positioning function

Abstract

The invention provides a threaded hole processing method with a positioning function; when processing is carried out through the threaded hole processing method with the positioning function, firstly an upper semi-positioning hole is processed; secondly a lower semi-positioning hole is processed with the upper semi-positioning hole as the guidance; thirdly a guide sleeve is arranged in the lower semi-positioning hole as the guidance for processing a lower threaded hole; through the method, the positioned threaded hole can be respectively processed in an upper semi-circular structural piece and a lower semi-circular structural piece; consequently, the processing speed can be effectively improved, and the threaded hole processing difficulty is reduced; meanwhile, the processing method can also effectively ensure the axial positioning and radial spacing requirements of the upper semi-circular structural piece and the lower semi-circular structural piece, so that the assembly precision requirements are met when the upper and lower semi-circular structural pieces are met; and the threaded hole processing method with the positioning function is particularly applicable to a vapor seal or a division sleeve and other work pieces with smaller width of a horizontal split on a steam turbine.

Description

Technical field [0001] The invention relates to a threaded hole processing method, in particular to a processing method of a positioning threaded hole for connecting upper and lower half-circle-shaped structural parts. Background technique [0002] Many ring-shaped parts, such as diaphragm sleeves, diaphragm steam seals, front steam seals, and rear steam seals used on steam turbines, are generally made up of upper and lower half-ring structural parts connected by bolts. For many ring-shaped parts of this structure, in addition to the requirement that the upper and lower half-ring structural parts are firmly connected, it is also required that the upper and lower half-ring structural plates can meet the assembly accuracy requirements, so that the upper, The middle facet gap between the lower two half-ring structural parts can be completely pryed tight, so that it is necessary to set positioning holes in the threaded holes connecting the upper and lower half-ring structural parts, ...

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a threaded hole processing method with positioning, which is used to solve the problem of the gap between the upper half-ring structure and the lower half-ring structure in the prior art. The facet width is small, and the problem that it is impossible to process the upper and lower half-circle structural parts respectively when processing the threaded hole

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