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With this technique attention is to be paid to the following:
- The workpiece is mostly chucked in hard chuck jaws.- The knurling wheels are fixed in the holder by unhardened steel pins (see Fig. 5).
- The knurling wheels must always be clean.
- The knurling holder is to be clamped approx. 1 mm below centre and at right angle to the workpiece axis.
- The matching edge bearing of the knurling tool must be perfectly fitting.
- By operating the cross-slide screw, the tool is pressed against the workpiece.
- If possible, the knurling should be produced in one feed setting.
- Good cooling and lubrication are to be ensured.
- The workpiece is to be chamfered after knurling.
- By visual inspection the knurling is checked.
Figure 18 Clamping of spiral knurling
holder below centre
1 spiral knurling wheel, 2 work-piece, 3 spiral knurling holder, 4 tool support (below centre of workpiece), 6 centre of workpiece
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Measure and test only with the machine at rest or the workpiece unloaded. |
Why are the workpieces provided with chamfers only after
straight or spiral
knurling?
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How are spiral knurling tools to be clamped and
serviced?
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What safety requirements must be met in spiral
knurling?
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What tools are used for chamfering the
workpieces?
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