Schunk, a provider of clamping and gripping technology for robots among other industrial products, has extended its toolholder program for micromachining.
The company says the expansion of its Tribos toolholder series in such a way as to make them “available quicker and at a lower price.
For the medical technology, optics, micro-mold making and watch and jewelry industries to achieve accuracy in the sub-micron range, toolholders must have extreme balancing grades.
Schunk says it has simplified and standardised what was “previously only possible with great effort”.
The Tribos-Mini and Tribos-RM polygonal toolholder series with HSK-E 25, HSK-E 32 and HSK-F 32 interfaces are available from a clamping diameter of 0.5 mm and optionally also ultra fine-balanced with a balancing grade of G 0.3 at 60,000 rpm. With them, it is possible to achieve even the most demanding specifications in terms of dimensional accuracy and surface finish, says Schunk.
Compared with conventionally balanced toolholders for micromachining, the tool service life is also extended. Schunk says the Tribos provides a return on investment “very quickly”.
Schunk says it expanded the Tribos range “due to high demand”, and has done so in such a way that many of the previous special solutions will now be included in the standard assortment, “meaning they will be available quicker and at a lower price”.
Tribos-Mini is now standardized with ø 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 6 mm, and 1/8 inch. Tribos-RM with ø 3 mm, 4 mm, 6 mm, 8 mm, 10 mm, 12 mm and 1/8 inch.
Both mountings are available with the HSK-A 25, -A 32, -A 40, -E 20, -E 25, -E 32, -E 40, HSK-F 32 and BT 30 and SK 30 interfaces.
Moreover, to offer interfaces and diameter variants that go beyond the standard program, Schunk has extended its capacities so that “special solutions”, such as Schunk Capto C4, SK 11.5, ISO 10, ISO 25, and others “can be implemented in a short amount of time”.
The Tribos polygonal clamping technology was developed and patented by Schunk, which says it “high absolute accuracy and dynamics, its excellent rigidity and its damping values ensure optimum surface finishes and long tool life”.
Schunk ass that it has a run-out and repeat accuracy of < 0.003 mm at an unclamped length of 2.5 x D and a balancing grade of G 2.5 at 25,000 rpm, and that “even the standard toolholders meet the toughest requirements”.
Schunk says the toolholders are suitable for all tool shanks in h6 quality, and have been tested at up to 205,000 rpm depending on the type.
Since the toolholders have no movable parts, they are not mechanically sensitive, and therefore ensure almost completely maintenance- and wear-free clamping, says Schunk. “Even after several thousand clamping procedures there are no signs of material fatigue.”
In addition, tool changes with Tribos are completed “in just a few seconds while ensuring process stability due to a hydraulic clamping device”.