P Horn’s Solutions For Micro Machining And Swisstype Turning For Precision And Tolerance
Precision and tolerance are complex for any machine shops. P Horn has just the tools to help operators obtain both.
Outer diameters of 0.1 mm (0.004”), recesses of 0.5 mm (0.020”) and feed rates of 5 μm (0.0002”) – welcome to the world of micro machining! Screws for hearing aids, balance weights for automatic wristwatches or microturned parts for medical assemblies: Manufacturing such parts requires know-how, precise machines and special tools. With cutting depths of down to 0.01 mm (0.0004”), users place very high demands on the tools used — for the aim of obtaining precision and tolerance.
They include shiny surfaces and high dimensional accuracy of the components through the use of low cutting force. For obtaining precision and tolerance, HORN has developed suitable solutions with the μ-Finish system for micro machining as well as with other tool systems and manufacturing processes for Swisstype lathes.
The Complex Criteria
The demands on the tools for micro machining with Swiss-type lathes are high. Due to the sometimes very small cutting depths, the tool edges must be very sharp in order to keep the cutting force as low as possible. However, the ground cutting edges are susceptible to micro chipping.
Even limited chipping in the range of a few μm at the cutting edge has a negative effect on the surface of the machined workpiece. Furthermore, the sur face quality of the rake face plays an important role. To counteract built-up edges, the rake face must have good sliding properties for precision and tolerance. For this reason, it is finely ground or polished.
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