Three types of gear blanks and selection of processing methods

The three forms of gear blanks and the selection of processing methods are as follows, for reference.

3. Three forms of gear blanks

1. Forgings

ThisgearWhen high strength, wear resistance and impact resistance are required, forgings are often used. For products with a diameter greater than 400-600mm, casting blanks are commonly used.

2. Bars

Used for gears with small size, simple structure and low strength requirements.

3. Casting

In order to reduce the amount of machining, gear teeth can be cast directly for large-size and low-precision gears.

In order to improve labor productivity and save raw materials, for small-sized and complex-shaped gears, new processes such as precision forging, powder metallurgy, precision casting, pressure casting, hot rolling and cold extrusion can be used to produce tooth blanks with gear teeth.

2. Two processing methods of gear blanks

1. Tooth blank processing for batch production

When mass production of gear blanks, the "car-pulling-carriage" process is often used.

It is characterized by stable processing quality and high production efficiency, which can be realized by horizontal lathe or turret lathe and broaching machine.

When the tooth blank hole has a step or the end face has a groove, you can make full use of the multi-tool on the turret lathe to perform multi-station processing, and complete the tooth blank processing at one time on the turret lathe.

a. Position the outer circle, end face and inner hole of the tooth blank or wheel.

b. Support the pull hole (or spline hole) with the end face.

c. Position the outer circle and end face of the precision turning with the hole.

2. Machining of tooth blanks for mass production

When a large number of medium-sized tooth blanks are processed in large quantities, the process of "drilling-pulling-multi-tool turning" is often used.

It is characterized by high production efficiency, because the use of high-efficiency machine tools can form assembly lines or automatic lines.

a. Use the outer circle and end face of the blank to drill or ream.

b. Pull the hole.

c. Position the outer circle, end face, grooving and chamfering on a multi-tool semi-automatic lathe with holes.

The processing plan of the gear blank mainly depends on the wheel structure and production type of the gear.

The above three types of gear blanks and the selection of processing methods, including but not limited to, if there are unclear points or relatedGear processingIf you need, you can consult EP for free.