With the THIELENHAUS-NISSEI double-sided grinding machine, the grinding space and dressing unit are easy to access, making tool changing easier and reducing downtimes significantly.
The focus of the design is high rigidity: closed box frames instead of a C-frame, forged instead of turned tool spindles, clever positioning of spindle tilting mechanisms and a double-walled frame design for temperature insensitivity. Indeed, the all-important dressing process requires such rigidity to create the appropriate tool geometries.
Other highlights include the spindle sleeve feed system in conjunction with a worm gear, the associated patented pneumatic compensation for thread play and high-precision ABEC-7 class bearings. Standard features include an automatic tool-wear compensation system for the lower grinding disc by means of in-process measurement.
As for machining results, with 68-mm steel precision discs, parallelism below 3 µm and surface results of Ra 3.2 µm can be achieved with a cycle time of 0.6 seconds. In another application, the machine achieves a removal of up to 0.6 mm per pass.
Ease of use is another advantage. A patented swivel transport disc bracket allows the operator to change the grinding discs easily through the large front opening just a few seconds after the spindles have come to a stop. With an adaptable tool-changing aid this can be done in just a few minutes. Depending on the tolerances to be achieved, workpieces can be machined using a flow, flow/plunge or oscillation process. For the highest component specifications, the workpieces can also be propelled in the grinding gap with the appropriate transport disc designs. Learn more at www.thielenhaus.com