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Utilities

Two simple calculator tools can be found in the Utility menu. These only run in their respective window and are not connected to the main simulation.

Turning Calculator

Turning calculator The turning calculator provides estimates of cutting- and feed-force, torque, mechanical power and conditions in the shear zone for a simplified turning problem. It may be used for both facing operations (radial feed) or axial turning (feed parallel to axis of rotation).

Material and lubrication/cooling type are selected in the same way as in the main simulation (but are not connected). The same material models as for milling are available for turning.

Part diameter is the diameter at which the cut is applied. For a facing operation, this value changes as the tool is fed into the part, so one value must be selected. For a conventional lathe that does not adjust speed with turning diameter, it may be best to set the initial (maximum) cutting diameter.

Speed can be adjusted either by entering the rotational speed [N] or the desired cutting speed [VC]. The other variable is then controlled by the last-changed setting, which is also displayed in bold.

The meaning of depth of cut depends on whether it is a facing operation (axial depth) or axial turning (radial depth). Feed is always specified per revolution. This value corresponds to the un-cut chip thickness.

There are no detailed tool models for this simplified turning calculation. Instead, the tool is characterized by the effective tool rake angle (that is, the sum of tool-holder and insert rake) and the cutting edge radius. If no better values are available, the approximations in the following table can be used:

Material category Rake Edge radius Comment
Wrought aluminium alloys ≈ 20° 5 µm Ground & polished inserts
Steel & general purpose ≈ 8° 15 µm Coated inserts
Hardened steel, HRSA ≈ 0° 25 µm Coated inserts, heavy duty

However, please note that forces depend strongly on tool geometry, so that such approximations will necessarily only yield rough estimates.

Drive Calculator

Drive calculator The drive calculator can be used to evaluate the static performance of a motor/transmission configuration. This can assist in identifying weak links in an existing machine or may be used to evaluate the potential benefit of modifications.

A similar calculator is opened when the linear axis drives of detailed machine models are configured (Edit - Machine - Drives). Details about the settings in the dialog can be found here.