Broaching versus other Machining operations: Merits of Broaching Machining, Demerits of Broaching Machining, Broaching applications, Machining Time in Broaching

Broaching versus other Machining operations

ย Merits ofย Broaching Machining

1. Broaching is faster than other machining operations.

2. It enables a higher rate of production, more accuracy, and better finish than otherย operations.

3. Since each tooth of broach takes a small cut that too only once in one operation, it hasย longer life than other cutting tools.

4. Owing to the above reason, the tool cost per work piece is low.

5. A single tool (broach) performs both roughing and finishing operations.

6. Better surface finish is obtained because different teeth perform different operation.

7. Cutting fluid can be applied more easily and effectively than other operations.

8. Because of simplicity of machining cycle, it does not required highly skilled operator.

9. Interchangeable components can be produced at a much faster rate by broaching thanย any other operation.

10. A specific advantage in broaching is that the cutting force of the broach serves toย clamp the work piece and hold it firmly in position.

Demeritsย ofย Broaching Machining

1. It is a single purpose tool and can produce only one type of surface.

2. The initial cost of the tool is very high compared to other tools.

3. It is unsuitable for small quantity and are of variable sizes.

4. All the jobs in broaching will need fixtures and this will add to the cost.

5. The broaching machine is costly of all machine tools its existence will not be justifiedย unless production required is very high.

6. Tool sharpening is difficult and expensive, needs separate sharpening machine.

7. All types of surfaces canโ€™t be machined through broaching.

8. Very light and delicate jobs cannot be broached easily, as they canโ€™t with stand theย cutting force.

9. Surfaces which lie in separate planes canโ€™t be machined in single setting.

10. Blind holes cannot be easily produced through broaching.

Broaching applications:

A wide variety of shapes, internal, external, regular, irregular, including complexย contours can be produced through broaching. Several shapes which are difficult to beย machined on the other machine tools can be easily machined through broaching.

Broaching applications include the machining of bearing caps, bearing bodies,ย cylinder blocks, connecting rods, cylinder heads, crank cases, rotors, toothed sprockets forย chain drives, gears, turbine blades, sleeves, bushings and air craft engine parts etc.

Machining Time

In broaching operation the machining time depends on effective length of broach i.e.ย the length of tooth system of the broach. It is given by the following relation.


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