Gear manufacturing

1. What is gear manufacturing process?
2. Which machine is used for gear manufacturing?
3. How are gears machined?
4. What is law of gearing?
5. Which type of machine is used for gear cutting purpose?
6. What is gear blank?
7. Can gears be made of wood?
8. What is a gear system?
9. Who invented gear cutting?
10. How are internal gears made?

What is gear manufacturing process?

Gear manufacturing refers to the making of gears. Gears can be manufactured by a variety of processes, including casting, forging, extrusion, powder metallurgy, and blanking. As a general rule, however, machining is applied to achieve the final dimensions, shape and surface finish in the gear.

Which machine is used for gear manufacturing?

The generating method is widely adopted in gear cutting, and the most common machine used is the hobbing machine. On the other hand, the forming method uses a milling machine equipped with a cutting tool with the same shape as the grooves of the desired gear.

How are gears machined?

The most common gear-cutting processes include hobbing, broaching, milling, and grinding. Such cutting operations may occur either after or instead of forming processes such as forging, extruding, investment casting, or sand casting. Gears are commonly made from metal, plastic, and wood.

What is law of gearing?

Law of gearing states that the common normal at the point of contact between a pair of teeth must always pass through the pitch point for all positions of mating gear. ... This is a must condition for the two gears to perform properly.

Which type of machine is used for gear cutting purpose?

Hobbing is a machining process for gear cutting, cutting splines, and cutting sprockets on a hobbing machine, which is a special type of milling machine. The teeth or splines of the gear are progressively cut into the material (a flat, cylindrical piece of metal) by a series of cuts made by a cutting tool called a hob.

What is gear blank?

In axial hobbing, firstly, the gear blank is brought toward the hob to get the desired tooth depth then the rotating hob is fed along the face of the gear blank parallel to its axis. This is used to cut spur and helical gears.

Can gears be made of wood?

It's vital to use good plywood for the gears. Ordinary spruce or fir plywood has layers that are too coarse, and the wood is not strong enough. But the Baltic birch plywood, with thin birch layers throughout, makes for an excellent material. ... The box joint jig plans even include gears of every size up to 48 teeth.

What is a gear system?

Gear systems consist of several gears and are major components of many engineering applications such as drive trains in cars. In operating gear systems, non-smooth dynamics such as gear hammering or high frequency oscillations may occur.

Who invented gear cutting?

This was just the beginning of something that changed the world for all the good reasons. However, in the 19^th century, form cutters and rotating cutters were first used and it was then in 1835 when the English inventor Whitworth patented the first gear hobbing process.

How are internal gears made?

Internal gears are manufactured by shaping process with a pinion cutter. Hobbing, milling and shaping with rack cutter is mainly used for external gears.