Product category:
Tool and cutter grinding
News Release from: Walter Maschinenbau | Subject: Helitronic Power Diamond and Helitronic Diamond
Edited by the Manufacturingtalk Editorial
Team on 07 May 2008
EDM/grinding make high quality tool
finishes
For obtaining exceptionally high surface qualities of up to 0.1 micron Ra, Walter's grinding/EDM machines use a four-stage erosion process to regulate the current intensity.
Walter Maschinenbau has introduced its Helitronic Power Diamond and Helitronic Diamond grinding/EDM machines for machining polycrystalline diamond (PCD) tools to surface qualities up to 0.1 micron Ra Walter said that PCD tools are only partially eroded according to geometry, such as inner radii or contours
This article was originally published on Manufacturingtalk on 21 Feb 2001 at 8.00am (UK)
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Also the surface quality that can be achieved during erosion is of great importance.
Walter's four-stage erosion process is a new standard on its erosion machines.
When carrying out this process, the intensity of the current during erosion is regulated with particular precision, which allows the lowest possible removal rates to be achieved, said Walter.
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The result is surface qualities of up to a 0.1 micron Ra.
Also the jaggedness of the PCD cutter is significantly improved.
This achieves levels of quality that come ever closer to those of the ground PCD tools.
For the user, the improved levels of quality of the tools represent an advantage with regard to service life and precision.
Increasing variety in geometry, and longer unmanned processing cycles are a general trend, which is why Walter Maschinenbau has introduced the electrode/grinding wheel changer for the Helitronic Power Diamond.
* Automatic tool changer (ATC) - the ATC can be equipped with conventional grinding wheels and with rotating electrodes.
The electrode/grinding wheel changer is mounted on the right side of the machine and holds up to 16 rotating electrodes or grinding wheels.
It possesses a special feature in that the coolant supply is integrated on the electrode/grinding wheel set holding fixtures so that the coolant supply is changed with them.
This ensures, at all times during processing, optimal cooling when grinding tools, or optimal shielding during erosion.
The ATC expands the unmanned processing time for nightshift and weekend operation.
Even very complex tool geometries in PCD tools can be processed with only slight possibilities of collision, thanks to the available capacity and the single-spindle concept.
During the erosion of stepped contour tools with different concave contour radii, the optimum rotating electrode is easily exchanged.
For a radius R = 0.1mm, a corresponding rotating electrode with R = 0.1mm is used.
For a radius R = 1mm, a different corresponding electrode is used.
This results in an optimum erosion rate and reduces the burning, since the electrode with R = 0.1mm is used only at the required tool location.
During the processing of PCD tools one can automatically switch between the production or re-sharpening of tungsten carbide cutting tools.
* About Walter Maschinenbau - Walter Maschinenbau has been producing tool grinding machines since 1953.
The company established itself as the world market leader with the launch of the Helitronic series in 1994.
Walter produces CNC machines under the name Helitronic for grinding and/or eroding of rotationally symmetrical precision tools, including PCD tools, for the metal and wood processing industries.
The Helitronic name stands for cutting-edge technology worldwide in tool grinding and tool eroding.
The production range is supplemented by the CNC Helicheck measuring machines for non-contact complete measurement of complex precision tools and rotationally symmetrical parts in one setting with documented precision.
Our success is the success of our customers - who expect the maximum from us in terms of quality, precision, productivity and service.
We offer an ideal product range covering the entire spectrum of requirements for both tool manufacturers and resharpening companies.
Our primary task is boosting our customers' productivity.
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