What is gear shaping?

How does gear shaper works? What is gear shaping?

Gear shaping is the process of making gears by using gear shaping machine.

Construction & Working

Gear is manufactured by using a special type of machine called gear shaper.
In gear shaping, a pinion type cutter is used.
The cutter teeth are ground with a top rake and clearance. It is mounted on a vertical spindle.
The axes of the cutter and blank are aligned as a parallel.
The cutter and the blank are made to rotate together as two gears which are in mesh. Both cutter and the blank are rotate at same speed.
The cutter reciprocates in a vertical direction along the width of the blank.
The pinion cutter is feed radially into the gear blank to give the depth of cut.
The cutter and the blank slowly rotate together till all the teeth are generated on the blank.
During each return stroke of the cutter, the blank is withdrawn.
This is done to prevent rubbing of the cutting edges and damage to gear teeth being cut.

Application:

Gear shaping is used for cutting external and internal spur gears.
Helical gears can also be shaped using special attachments.

Advantages:

Single cutter can be used for cutting spur gears of any number of teeth having the same module as that of cutter.
Internal gears can be easily cut.
As the cutting action is continuous, the rate of production is high.
Cluster gears can be cut.

Limitations:

Worm gears cannot be produced in this method.

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