Mechanically clamped type fir tree blade-root milling cutter

Abstract

The invention discloses a mechanically clamped fir tree blade-root milling cutter. The mechanically clamped fir tree blade-root milling cutter comprises a fir tree shaped cutter body and eight rows of cutter grooves which are arranged in the cutter body, wherein two first cutter blades which are symmetrically distributed with respect to the center are arranged in the first row of cutter grooves starting with the end surface, the front cutter surfaces of the first cutter blades pass through the center, and the front angles of the first cutter blades are 0 degrees; two second cutter blades which are symmetrically distributed with respect to the center are arranged in each of the second row of cutter grooves, the fourth row of cutter grooves and the sixth row of cutter grooves, the front cutter surfaces of the second cutter blades pass through the center, and the front angles of the second cutter blades are 0 degrees; third cutter blades and fourth cutter blades which are symmetrically distributed with respect to the center are arranged in the third row of cutter grooves and the fifth row of cutter grooves; and two fifth cutter blades which are symmetrically distributed with respect to the center are arranged in each of the seventh row of cutter grooves and the eighth row of cutter grooves, and the front cutter surfaces of the fifth cutter blades pass through the center, and the front angles of the fifth cutter blades are 0 degrees. The mechanically clamped fir tree blade-root milling cutter has the advantages that the quantity of the cutter blades is reduced on the premise of realizing a complete processing profile and considering specialized processing sites, and the rigidity and strength of the cutter body are ensured to the greatest extent, thereby providing a guarantee for the rigidity of the cutter in a processing process and reducing the vibration stripes of the cutter generated due to vibration.

Description

technical field [0001] The invention belongs to the technical field of processing steam turbine blade fungus-shaped blade roots, and in particular relates to a machine clip-type fungus-shaped blade root milling cutter. Background technique [0002] In the process of producing steam turbine blades, in order to install the steam turbine blade root, a fungus-shaped groove is formed on the outer ring of the rotor. The fungal-shaped blade root blade is installed on the outer ring groove to form a first-stage blade. The side-mounted machine clip structure greatly reduces the cost of the tool, but because the shape of the blade is matched according to the fungus type line, the general blade on the market cannot be used, so the manufacturing cost of the blade increases. Contents of the invention [0003] In order to overcome the disadvantages of the prior art, the present invention provides a machine-clip fungus type leaf root milling cutter. [0004] The technical solution adopt...

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Problems solved by technology

[0002] In the process of producing steam turbine blades, in order to install the steam turbine blade root, a fungus-shaped groove is formed on the outer ring of the rotor. The fungal-shaped blade root blade is installed on the outer ring groove to form a first-stage blade. Side-mounted clip-on structure, so the cost of cutting tools is greatly reduced, but because the shape of the blade is matched according to the fungus type line, it is not possible to use general-purpose blades on the market, which increases the manufacturing cost of the blade

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