Efficient grinding method for tipping tooth tops of side-edge-free roughing broaches

A technology for grinding broach teeth and teeth, which is applied to broaches, broaching machines, metal processing equipment, etc., can solve the problems of reducing the number of regrinding of tools, increasing the use cost, and reducing the service life, so as to achieve the purpose of grinding The effect of shortening the time, prolonging the service life and reducing the production cost

Active Publication Date: 2013-07-17
SHANGHAI SMARTSTATE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two traditional broach grinding methods: one is the grinding method of the rake face of the cutting edge; the other is the grinding method of completely grinding off the chipped teeth, and the follow-up teeth are evenly distributed b

Method used

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  • Efficient grinding method for tipping tooth tops of side-edge-free roughing broaches
  • Efficient grinding method for tipping tooth tops of side-edge-free roughing broaches
  • Efficient grinding method for tipping tooth tops of side-edge-free roughing broaches

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Embodiment Construction

[0028] The invention is a high-efficiency grinding method for tooth tip chipping of a rough broach without a side edge, which is used for the tenon and groove broaching of a heavy-duty gas turbine rotor disk. In the triangular area at the tip of the cutter tooth, the subsequent cutter teeth are ground according to the shape of the chipping cutter tooth after grinding, and the grinding allowance is gradually reduced. The last three subsequent teeth of the broach are kept without grinding to ensure the broach Knife shape line, so as to change the local envelope of grinding broach teeth to achieve efficient grinding without side edge rough broach tooth chipping. The length of the triangular area at the tip of the chipped tooth of the grinding broach is no more than 5% of the width of the tooth, and the maximum depth is no more than 3% of the tooth height.

[0029] Please refer to figure 1 and figure 2 According to the present invention, the high-efficiency grinding method of t...

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Abstract

The invention discloses an efficient grinding method for tipping tooth tops of side-edge-free roughing broaches. The efficient grinding method is characterized in that a magnetic workbench is deflected by a certain angle to grind triangular areas of tips of tipping teeth of a broach, follow-up teeth are ground according to shapes of the ground tipping teeth, the grinding allowance of the follow-up teeth is gradually reduced, the last three follow-up teeth of the broach are kept unground to guarantee the profile of the broach, accordingly, local envelope curves of the ground teeth of the broach are changed, and the tipping teeth of the side-edge-free roughing broach are efficiently ground. The efficient grinding method has the advantages that the profile of the original integral envelope curve of the broach is guaranteed, the grinding allowance is low, a blade of the broach is ground uniformly, the grinding time is greatly shortened, impact and vibration on the front-back teeth adjacent to the tipping teeth can be effectively reduced, the grinding efficiency is improved, grinding permissible times of the broach are increased, the service life of the broach is prolonged, the production cost is lowered, and the efficient grinding method is suitable for broaches with various structures and is particularly suitable for grinding side-edge-free roughing broaches for machining mortises of rotor discs of heavy-duty gas turbines.

Description

technical field [0001] The invention relates to a grinding method for a metal cutting tool, in particular to a high-efficiency grinding method for tooth tip chipping of a rough broach without a side edge, and belongs to the technical field of mechanical cutting processing and manufacturing. Background technique [0002] As the most advanced and complex mechanical manufacturing technology in the world, heavy-duty gas turbine manufacturing technology has become an important symbol to measure the manufacturing capacity of my country's energy industry. The working temperature of gas turbine rotor is high, the volume of rotor forging is large, and it needs to bear large centrifugal force and additional stress when rotating at high speed. This requires the rotor material to have good high temperature tensile strength, good plasticity, high creep strength, and low The ductile-brittle transition temperature and other properties. Therefore, the material of the rotor disk is a diffic...

Claims

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Application Information

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IPC IPC(8): B24B3/16
Inventor 陈明王呈栋刘志强安庆龙李明超孔啸
Owner SHANGHAI SMARTSTATE TECH CO LTD
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