Split mounting-type alloy steel frog working edge and rail top integral special-purpose milling cutter

Abstract

The invention discloses a special milling cutter for the working side and rail top of an assembled alloy steel frog. The front end of the milling cutter head is round cake-shaped and the rear end is cylindrical. The pie-shaped diameter is Ø336mm, the round pie-shaped thickness is 51.22mm, and the total thickness is 83mm. There is a Ø60mm installation hole in the middle of the milling cutter head; at the end with a diameter of Ø336mm, the angle is inclined outward from the edge of the installation hole to the inward edge of the round pie-shaped edge. is 87.14°, and the back end of the round pie is inclined 101.31° to the inside of the round pie ⁰ , The inclined surface of the round pie-shaped front end of the milling cutter head is equipped with an array of flat blades in the radial direction, and an R16 outer arc blade is provided at the junction of the outer edge and the round pie-shaped rear end, and a flat blade is provided at the connection with the R16 inner arc blade Group 2, there is R13 inner arc blade at the connection with flat blade group 2, R13 inner arc blade is connected to flat blade group 3, flat blade group 3 continues to the end of the milling cutter head with a diameter of Ø238mm, the flat blade group and the center The angle between the lines is 2.86°.

Description

technical field [0001] The invention relates to an assembled alloy steel frog working side and rail top integral special milling cutter, which belongs to the technical field of railway turnout mechanical processing. Background technique [0002] my country's railway construction is developing in the direction of high-speed and heavy-duty. The manganese steel frog that has been used for decades has gradually withdrawn from the historical stage. A new type of assembled alloy steel frog has gradually replaced the manganese steel frog; assembled alloy steel frog It is composed of alloy steel forged core rail, fork heel rail, and wing rail. After assembly, it needs to be machined to form. It has greater mechanical properties and performance than manganese steel frogs. In the process of mechanical processing, it is necessary to use appropriate tools, and it is necessary to design a special tool to produce this assembled alloy steel frog; because the assembled alloy steel frog is ma...

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Problems solved by technology

In the process of mechanical processing, it is necessary to use appropriate tools, and it is necessary to design a special tool to produce this assembled alloy steel frog; because the assembled alloy steel frog is made of cuboid alloy steel forged core rail and ordinary steel rail shape The fork heel rail and the wing rail are fastened by spacer iron and bolts. The working side is composed of a platform descending 50mm from the top of the rail, a transition arc of R16, and a 1:5 slope. The top of the rail is a transition arc of R13. , 1:20 slope, the top of the rail is reduced by 2.5 mm from the 50 mm section to 20 mm section height, and then reduced by 7.5 mm from the 20 mm section to 10 mm section height, and then reduced by 40 from the 10 mm section to 5 mm section height mm, the processing of these planes and arcs is time-consuming and labor-intensive

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