High-performance cutters for micro-milling applications

Related Vendors

Jongen Werkzeugtechnik GmbH

Ramada Acos

Theory is important, but practice is decisive

Fette Compacting produces tablet presses for the pharmaceutical and chemical industries. The company considers itself to be a technology leader and system provider that develops and produces all devices and tools in-house for tablet production, from the extrusion die, through the computer-controlled tablet press, to the isolator. A wide selection of specially developed peripheral devices rounds off the product range.

Clamp acts as ‘third hand’ to secure parts for finishing5

The small cutters are even suitable for hardened metal cutting. A coated micro-HSC-Line solid carbide end mill cutter with a diameter of 1 mm was used. The tool has a ball nose (0.5 mm radius) and two cutting edges. It is coated with TiSiN. The tool is used on a standard milling machine with HSC spindle. The material PM HSS with a hardness of 50 HRC was finished at the following cutting values: Cutting speed vc = 94 m/min; rotational speed n= 30,000 rpm; feed per tooth fz = 0.02 mm; feed rate vf = 1,200 mm/min; radial depth of cut ae = 0.05 mm; axial depth of cut ap = 0.02 mm.

Gallery

Gallery with 5 images

The second application case dealt with the production of embossing dies with the objective of significantly reducing production costs. The embossing tools for producing tablet dies also contain the LMT logo, which later appears on the tablet that is produced. These operations were performed with gravers up to now, and were roughed down and finished. The graver was made of solid carbide and had a point angle of 60°. The contact variables were only ae = ap = 0.002 mm.

Hot-working steel's properties and homogeneous structure delay the generation of hot cracks

This process took a long time due to the small contact variables and should thus be substituted by micro-milling. Three different coated VHM micro-milling cutters were used, which shared the roughing down and finishing operations:

• Roughing down the mould with a tool diameter of 2 mm.

• Roughing down with a tool diameter of 1 mm.

• Finishing with a tool diameter of 0.4 mm.

(ID:43254482)