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Machining of profiles on the shaping machine is often applied, as production at favourable costs, especially single-piece production, is possible with relatively simple tools.
Figure 21. Profiles
The more surfaces and shapes of different kind exist on the workpiece, the higher are the skills required for machining the profiles.
Profile workpieces are machined by manufacturing the surfaces and shapes individually one after the other.
Profiles are shaped in most cases by means of:
- contours marked on the workpiece
- templates
- sample
workpieces.
Machining is made in the following working steps:
- positioning of the tool according to marking, template or
sample workpiece
- scratching of the workpiece
- checking for accuracy of
dimensions and profile
· Before finishing, recess the groove centrally.· Finish the profile.
· Check for dimensional and geometrical accuracy.
· Work in the machine vice.
· Be sure to align the workpiece exactly plane-parallel.
· If profiles are rough-machined before, adjust the tool according to the necessary machining allowance by placing a slip gauge on the template or the sample workpiece.
· Only such pieces are suited as sample workpieces which can be chucked with the workpiece directly in the machine vice.
· If several workpieces with the same profile are to be manufactured, position them one after the other according to the possibility of clamping and machine them together. When clamping the workpieces take care to ensure that all workpieces are positioned next to each other plane-parallel and well aligned.
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