Forming milling cutter for machining blade roots of gas turbine compressor blades
A gas turbine and forming milling cutter technology, which is applied in the direction of milling cutters, metal processing equipment, milling machine equipment, etc., can solve the problems of impossibility to finely mill blade roots, easy steps, and scrapped workpieces, so as to ensure surface roughness, improve quality, The effect of reducing scrap rate
Active Publication Date: 2020-04-07
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Problems solved by technology
The processing requirements of the blade root 100 are: the surface roughness of the blade root 100 is only Ra1.6, the connection between the working pressure surface 101 and the fillet 102 must be smooth, and no steps are allowed, which makes the processing of the blade root difficult
However, the general-purpose milling cutters in the prior art obviously cannot finish milling the rounded corners of the blade root, so steps are prone to appear, which in turn leads to the scrapping of the workpiece
Method used
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[0028] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.
[0029] It should be noted that the structure, ratio, size, etc. drawn in the drawings of this specification are only used to match the content disclosed in the specification for the understanding and reading of those familiar with this technology, and are not used to limit the implementation of the present invention. Therefore, it has no technical significance. Any structural modification, proportional relationship change, or size adjustment should still fall within the scope of the present invention without affecting the effects and objectives that can be achieved by the present invention. The technical content can cover the range. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this speci...
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The invention provides a forming milling cutter for machining of a blade root of a blade of a gas turbine gas compressor. The forming milling cutter comprises a cutter body and a cutter head arrangedat one end of the cutter body. The cutter head is provided with at least two cutting teeth evenly distributed in the circumferential direction. Each cutting tooth is provided with a cutting edge, andthe molded line of each cutting edge is matched with that of the circular bead portion on the blade root. According to the forming milling cutter, customization is carried out according to the specific blade root molded line, finish milling of the circular bead portion in the blade root can be achieved, surface roughness of the blade root can be effectively guaranteed, the work pressure face and the circular bead portion of the blade root are in smooth connection, and steps are avoided; and the workpiece quality is greatly improved, and the rejection rate of workpieces is reduced.
Description
Technical field [0001] The invention relates to a milling cutter, in particular to a forming milling cutter for processing the blade root of a gas turbine compressor blade. Background technique [0002] In the gas turbine unit, the compressor mainly uses high-speed rotating blades to do work on the air to increase air pressure and ensure the normal operation of the gas turbine unit. Therefore, higher requirements are put forward for the quality of the compressor blades. The blade root of the compressor mainly includes two parts: the intermediate and the root profile, and, as figure 1 As shown, the blade root 100 has a working pressure surface 101 and a rounded corner 102. The processing requirements of the blade root 100 are: the surface roughness of the blade root 100 is only Ra1.6, and the working pressure surface 101 and the fillet 102 must be smoothly connected, and no steps are allowed, which makes the processing of the blade root difficult. . Obviously, the general-purpos...
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IPC IPC(8): B23C5/02
CPCB23C5/02
Inventor 邬红伟李宇飞刘云雷
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD