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A processing method for a large wheel groove semi-finishing milling cutter

A processing method and semi-finishing milling technology, which is applied to milling cutters, metal processing equipment, manufacturing tools, etc., can solve the problems of complex structure of large wheel groove rough milling cutters, difficulty in ensuring machining accuracy, and cumbersome processing steps, etc., to meet the requirements of Accuracy requirements, solving difficult processing, and scientific and reasonable structural design

Active Publication Date: 2018-05-22
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a processing method for a large wheel groove semi-finish milling cutter, so as to solve the problem that the large wheel groove rough milling cutter has cumbersome processing steps due to its complex structure, complicated operation and difficult to ensure the processing accuracy

Method used

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  • A processing method for a large wheel groove semi-finishing milling cutter
  • A processing method for a large wheel groove semi-finishing milling cutter
  • A processing method for a large wheel groove semi-finishing milling cutter

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specific Embodiment approach 1

[0035] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, this embodiment comprises positive rod body, one end of positive rod body is handle end, and this handle end is ISO40 tapered shank 12, and the other end of described positive rod body is molding line end, and this end is along positive rod end. The axial direction of the rod body is uniformly processed with a plurality of tooth back steps 3, and the outer circles of the plurality of tooth back steps 3 gradually decrease from one end close to the ISO40 taper shank 12 to the other end away from the ISO40 taper shank 12, every two A chip pocket 2 is processed between adjacent tooth back steps 3, and the chip pocket 2 is arranged along the axial direction of the positive rod body. Multiple tooth back steps 3 are evenly divided by a plurality of chip pockets 2 to form multiple The grinding and shoveling teeth 1 arranged in the axial direction of the rod body, the flank of each grindi...

specific Embodiment approach 2

[0038] Specific implementation mode two: combination figure 1 and figure 2 This embodiment will be described. In this embodiment, an M16 threaded hole 7 is processed on the ISO40 tapered shank 12 . In this embodiment, the M16 threaded hole 7 is a connecting hole, which is used to fix the large wheel groove semi-finishing cutter in the present invention. Other unmentioned structures and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0039] Specific implementation mode three: combination figure 2 To describe this embodiment, the number of chip flutes 2 in this embodiment is four, and the included angle between every two adjacent chip flutes 2 ranges from 68° to 72°. Other unmentioned structures and connections are the same as those in the second embodiment.

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Abstract

The invention provides a semi-finishing milling cutter for a large wheel groove and a machining method of the semi-finishing milling cutter, and relates to a milling cutter and a machining method of the milling cutter. Because a thick semi-finishing milling cutter for the large wheel groove is complex in structure, the machining process of the thick semi-finishing milling cutter is tedious in step and complex in operation, and the machining precision is difficult to ensure. An ISO40 conical handle is arranged at one end of a forward stick body, and a profile end is arranged at the other end of the forward stick body. A plurality of tooth back steps are evenly machined on the profile end in the axial direction of the forward stick body. The outer circles of the tooth back steps are sequentially decreased from the end close to the ISO40 conical handle to the other end away from the ISO40 conical handle. A chip containing groove is machined between every two adjacent tooth back steps. The tooth back steps are evenly segmented by the chip containing grooves so that a plurality of relief grinding teeth arranged in the axial direction of the forward stick body can be formed. The rear cutter face of each relief grinding tooth is of a continuous arc shape. A plurality of key grooves are machined in the middle of the forward stick body. The machining method includes fourteen steps. The semi-finishing milling cutter and the machining method are used for the machining process of turbine rotors.

Description

technical field [0001] The invention relates to a processing method of a large wheel groove milling cutter, which belongs to the technical field of mechanical processing. Background technique [0002] Wheel groove milling cutter, also called Christmas tree milling cutter, is a complex forming tool specially designed for steam turbine rotor wheel groove processing. It is also an important tool for machining steam turbine rotors. The large wheel groove milling cutters used in the processing of rotor grooves for million-level ultra-supercritical units and nuclear power units have complex profiles and require high precision. Groove milling has always been a relatively time-consuming production process in the machining process of steam turbine rotors. The traditional wheel groove milling cutters used in the past used ordinary high-speed steel and ordinary geometric structures, which resulted in low production efficiency, short tool life and high processing costs. [0003] The sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C5/02B23P15/34
CPCB23C5/02B23C2210/40B23P15/34
Inventor 吕宾刘剑孙盛丽王志臣
Owner HARBIN TURBINE
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