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Chapter: Mechanical - Manufacturing Technology - Abrasive Process and Broaching

Surface broaches and Continuous Chain Broaching

The broaches used to remove material from an external surface are commonly known as surface broaches.

Surface broaches

 

The broaches used to remove material from an external surface are commonly known as surface broaches. Such broaches are passed over the workpiece surface to be cut, or the workpiece passes over the tool on horizontal, vertical or chain machines to produce flat or contoured surfaces.

 

While some surface broaches are of solid construction, most are of built-up design, with sections, inserts or indexable tool bits that are assembled end-to-end in a broach holder or sub holder. The holder fits on the machine slide and provides rigid alignment and support.


 

Continuous Chain Broaching

 

Continuous chain, or simply chain broaching refers to the type of machine that is used to broach a piece part.

 

Chain broaching is oriented towards high volume production, and is an extremely fast and efficient operation. However, because the fixtures used to hold the piece parts are mounted on chains that are driven by sprockets, it is difficult to hold extremely close tolerances. This process is suitable for high-volume, external cutting.




Continuous Chain Broaching Industries

 

·        Biomedical

·        Electronics

·        Defense

 

A chain broaching machine resembles a very long tunnel, through which passes a series of holding fixtures, or cars. Piece parts are loaded, usually automatically, into the cars, which themselves are mounted on, and carried through the tunnel by a very large continuous chain. The broach tooling is mounted on the inside walls of the tunnel, and this tooling cuts the piece part as it passes through the tunnel. Contact us today to learn more.



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