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Dovetail grooves are machined in the following working steps:
- recessing of a rectangular groove
- machining of an
inclined surface
- machining of the opposite surface
Figure 20. Working steps when
machining dovetail guides
(1) recessing of a rectangular groove, (2) machining of an inclined surface, (3) machining of the opposite surface, 1 feeding movement
· Work with the machine vice.
· Align the workpiece accurately and in parallel.
· Recess the rectangular groove to the depth of the dovetail groove to be produced and finish-machine the upper width.
· Cut out both side parts one after the other (shoulder tool).
· Wide and flat dovetail grooves can be shaped with a forming tool after the rectangular groove has been cut out.
Why are at first the depth and upper width finish-machined when
making dovetail
grooves?
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When are dovetail grooves finished in one
operation?
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What functions do dovetail guides
have?
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What are the criteria for feeding when inclined surfaces are
machined?
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Grooves are checked according to the required accuracy at several points of the workpiece by means of depth gauge, vernier caliper, slip gauge or gauge.
The geometrical accuracy is checked vertically to the machining direction with a gauge.
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