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Essentially, the milling machine is set up for parallel milling in the same way as for face milling.
What is to be taken notice of and checked before a milling machine is put into operation?
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Sequence of operations:
- The clamping means for positioning and securing the workpiece are fixed and aligned in the same way as for face milling.- Setting-up of cutting values on the milling machine is followed by the so-called "scratching", by adjusting the depth of cut and the first milling operation (rough milling). After having finished the first size control, the required finish-size is set and the second milling operation is conducted (finish-milling).
- Now, the milling machine is reset, i.e. set for milling of parallel surfaces according to the task set.
- Parallel surfaces may, for instance, be a second longitudinal or flat side of a prismatic workpiece or they may be surfaces of a kind of section and running in parallel line to the first side (plane surface).
Figure 21 Face and parallel milling
(1) plane surface (plain milling)
(2) parallel surface (face
milling)
(3) parallel surfaces
Figure 22 shows the setting-up of the milling machine for parallel milling with the gang milling cutter.
Figure 22 Milling with gang mill
cutters
1 workpiece, 2 gang mill cutter consisting of 3 side milling cutters and 2 plain milling cutters
- When the parallel milling of the first workpiece has been terminated, accuracy control and, a possible correction of size adjustment is effected if necessary. Subsequently, the remaining workpieces are machined and quality is permanently controlled.Paying attention to the entire milling operation, checking accuracy permanently and adhering to the labour safety regulations ensure a trouble-free production run.
- After the successful termination of the work order, the milling machine, cutting tools, clamping and testing tools as well as the total workplace are cleaned.
Which operational steps are necessary for milling parallel surfaces?
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