What is Hand Tools?
Broaching is a machining process that uses a toothed tool called a broach to remove material from a workpiece to produce holes, slots and shapes in the workpiece. Broaching is commonly used to produce precision linear and angular surfaces with straight or irregular profiles as well as internal or external surfaces on mass-produced metal workpieces.
Types of Hand Tools
There are different types of broaches used depending on the shape that needs to be cut. Some common broach types include:
- Straight broaches: Used to cut straight slots and shapes without any angularity. These have straight rows of teeth.
- Angle broaches: Used to cut slots and shapes that involve angular cutting. The teeth are arranged at predetermined angles.
Broaching Process
The basic Hand Tools process involves the following steps:
1. The workpiece is securely clamped using fixtures to prevent any movement during broaching operation. Proper clamping is critical for dimensional accuracy.
2. A lubricant is applied to reduce friction and heat generated during metal removal. Water-soluble cutting oils are commonly used
- The broach tool is positioned at the start point of the cut on the workpiece. It may be manually or automatically fed.
- Using downward pressure, the broach is fed through the workpiece while the teeth shear off slices of metal in the required shape or profile.
- The broaching strokes continue till the full shape is cut. Multiple passes may be required for deep cuts.
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