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Cutter for machining straight bevel gear

A technology of straight bevel gears and cutting tools, which is applied in the direction of gear tooth manufacturing tools, manufacturing tools, components with teeth, etc., can solve the problems of insufficient machining accuracy, low production efficiency, fast wear, etc. Threshold, cutting line speed increase, the effect of increasing cutting speed

Active Publication Date: 2022-04-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The machine tools used in these processing methods use mechanical transmission chains, which have low transmission accuracy and difficult adjustments.
Moreover, the processing methods are all intermittent indexing, the production efficiency is low, and the processing accuracy is not high enough.
The used tool has fewer teeth involved in cutting, wears quickly, frequently changes the tool and regrinds, and has a low service life
The dimensional consistency of the processed straight bevel gear is poor, which makes the quality of the product unstable. It is not suitable for the efficient and stable mass production of the straight bevel gear, which greatly limits the application and development of the straight bevel gear.
At present, straight bevel gears have not yet been processed by continuous generation.

Method used

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  • Cutter for machining straight bevel gear
  • Cutter for machining straight bevel gear
  • Cutter for machining straight bevel gear

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The gear ratio of a pair of bevel gears is 20:21, the big end modulus is 1mm, the pressure angle is 20 degrees, the tooth width is 5mm, the addendum height coefficient is 1, and the head clearance coefficient is 0.2. This embodiment provides a tool for machining large gears, which is used for semi-finishing of the soft tooth surface of straight bevel gears, finishing of workpieces and removal of burrs.

[0027] see figure 1 with figure 2 , according to the design requirements: the shape of the cutter body 1 is the same as that of the pinion in the pair of straight-toothed bevel gears, and the modulus, pressure angle, number of teeth, addendum height coefficient, and head clearance coefficient are all consistent with the pinion; each There are 7 cutter teeth evenly distributed on the straight teeth of the bar, and a tooth groove 3 is opened between two adjacent cutter teeth 2 along the cutter tooth width B direction; the tooth top of each cutter tooth 2 is provided wit...

Embodiment 2

[0031] The gear ratio of a pair of bevel gears is 20:17, the big end modulus is 1mm, the pressure angle is 20 degrees, the tooth width is 4mm, the addendum height coefficient is 1, and the head clearance coefficient is 0.2. This embodiment provides a cutting tool for processing pinion gears, which is used for semi-finishing the soft tooth surface of straight bevel gears, smoothing the workpiece and removing burrs.

[0032] According to the design requirements: the shape of the cutter body 1 is the same as that of the large gear in the pair of straight-toothed bevel gears, and the modulus, pressure angle, number of teeth, addendum height coefficient, and head clearance coefficient are all consistent with the pinion gear; each There are 4 cutter teeth evenly distributed on the straight teeth, and a tooth groove 3 is opened between two adjacent cutter teeth 2 along the cutter tooth width B direction; the tooth top of each cutter tooth 2 is provided with a top edge 5 and a side edg...

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Abstract

The invention belongs to a cutter for machining a straight bevel gear, and belongs to the technical field of gear machining equipment. The cutter is a hobbing cutter; the shape of the cutter body is the same as that of a matched gear of a machined gear; more than four cutter teeth are uniformly distributed on each straight tooth, and a tooth groove is formed between every two adjacent cutter teeth in the tooth width B direction of the cutter; a top edge and a side edge which are connected in sequence are arranged on the tooth top of each cutter tooth; a chip containing groove is formed between every two adjacent straight teeth; the tooth width B of the cutter is larger than the tooth width of the straight bevel gear to be machined; the cross section of each cutter tooth is trapezoidal or rectangular; the cutter is used for semi-finishing the soft tooth surface of the straight bevel gear, finishing a workpiece and removing burrs. According to the cutter, continuous generating machining of the straight bevel gear can be achieved on a common gear hobbing machine, and a special bevel gear machining machine tool does not need to be used; the problem that intermittent indexing is needed during traditional gear milling machining and gear shaping machining is solved, the production efficiency and the quality stability of machined products are greatly improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of gear processing equipment, and in particular relates to a tool for processing straight bevel gears. Background technique [0002] Gear transmission is the most common type of mechanical transmission in modern machines. Among them, the bevel gear is used for the transmission of intersecting axes, and the intersecting angle of the axes can be any angle. It has the characteristics of strong bearing capacity, stable transmission and low noise. Because the tooth shape of straight bevel gear is relatively simple, its design, manufacture and installation are easy, and the production cost is low, so it has been widely used without special transmission requirements. [0003] At present, traditional machining methods such as milling, planing, and broaching are still commonly used in the processing of straight bevel gears in China. The milling method is to use a milling cutter to process the gear one by one accor...

Claims

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Application Information

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IPC IPC(8): B23F21/18
CPCB23F21/183
Inventor 夏链谢云汉田晓青韩江
Owner HEFEI UNIV OF TECH
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