What is HPC milling??
By HPC milling we mean in the CAM environment the machining of any material with an increase in chip volume of 75% and more.
The difference to HSC milling, in which the cutting volume is achieved by a large number of movements and with high feed rates, is the HPC milling
the aim is to achieve the largest possible cutting volume per cut. The advantage over HSC milling is that any milling machine or lathe-milling machine can be used, as only medium cutting speeds and feeds matched to them are used. Therefore the investment in a new or even HSC machine is not necessary. The tools should
have an unequal division. These tools are offered by numerous manufacturers at very moderate prices between 40,- and 80,- € for a 12mm milling cutter.
Decisive for this process is the optimized creation of the machining strategy. Within the CAM software Sprutcam, we decided to develop our own HPC engine and offer it under the name Sprutcam Fastmill. It is therefore a 100% Sprutcam product, which is offered for 950,- € as an option on the modules from Sprutcam Level 3 (Expert).
further information under Wikipedia: https://de.wikipedia.org/wiki/High_Performance_Cutting
The picture below shows the problem areas of a normal toolpath in yellow. In order to be able to work in the critical areas, the user reduces the feed rate, the sides or the depth infeed. This reduces the chip volume and prevents tool breakage in critical areas. The weakest link controls the cutting values.
Tool path without Fastmill
Fastmill always calculates a constant chip volume with control of a minimum and maximum wrap angle. Thus, even with high-strength materials, cutting values of 6000 mm/min and a cutting depth of 2-3 times the diameter of the milling cutter can be achieved. The side feed is usually between 10% and 30% of the cutter diameter.
In the picture below you can see a typical Fastmill toolpath.