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Machining Processes - Horizontal Boring and Line Boring, Heavy Machining
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Horizontal boring is a heavy machining process whereby a part to be machined is clamped to a bed and a machining tool is rotated to produce some cylindrical, internal feature in the work piece such as bearing diameters and seal surfaces. The cylindrical surface to be produced is oriented in the horizontal direction and the tool is typically fed across into the work piece.
Many horizontal boring operations can be performed by a conventional mill and boring attachment, so in general horizontal boring machines are used to machine large castings and blocks of metal too heavy for a regular mill or too heavy to rotate the work piece..
One of the key advantages of horizontal boring is that the need for a large amount of power to rotate a very large block of steel and the associated dangers are avoided. It is far easier to clamp a large work piece down and feed a rotating cutting tool into it, hence the main application is in heavy engineering activities.
Typical applications for vertical boring are:
- Line boring of large machine tool casings and engine blocks.
- Machining internal bearing diameters in large castings.
- Finish machining of cylindrical surfaces on very large work pieces.
Line boring is a variation on horizontal boring and is the process of machining multiple diameters with a guided tool to ensure all diameters are on the same centreline.
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