Activities per year
Abstract
The RPM-Synchronous Grinding process offers new
possibilities to generate defined macro- and micro-geometries on
workpieces. With present technology, various macroscopic non-
circular geometries must be grinded subsequently in an
oscillating process where the X-axis is coupled with the rotary
workpiece-spindle axis. Such workpieces can be machined in an
ordinary plunge grinding process by implementing the approach
of RPM-Synchronous Non-Circular Grinding. Therefore, the
workpiece and the grinding wheel rotational rates are in a fixed
ratio. A non-circular grinding wheel is used to transfer its
geometry onto the workpiece. The authors use a unique machine
tool for basic research and control concept development for
RPM-Synchronous Grinding (RSG). The machine was
especially designed for this RSG technology. Highest revolution
rates on the workpiece spindle are mandatory for its success. The
grinding approach is performed in a two-step process. For
roughing, a highly porous vitrified bonded grinding wheel with
medium grain size is used. It ensures high specific material
removal rates for producing the non-circular geometry on the
workpiece efficiently. A control algorithm adapts this process
step, which uses acquired data from a piezoelectric three-
component force sensor fixed at the tailstock-side of the grinding
machine. For finishing, a grinding wheel with fine grain size is
suited. This process step is tuned by a digital process adaption
strategy. Roughing and finishing are performed consecutively
among the same clamping of the workpiece with two locally
separated grinding spindles.
With the presented control and adaption concepts for RPM-
Synchronous Grinding, a significant increase in surface quality
on the workpiece is attained. The minimization of grinding
wheel wear results concurrently. Especially the automotive
industry shows big interest in RPM-Synchronous Non-Circular
Grinding. This emerging trend in finishing machining opens up
various fields of application.
possibilities to generate defined macro- and micro-geometries on
workpieces. With present technology, various macroscopic non-
circular geometries must be grinded subsequently in an
oscillating process where the X-axis is coupled with the rotary
workpiece-spindle axis. Such workpieces can be machined in an
ordinary plunge grinding process by implementing the approach
of RPM-Synchronous Non-Circular Grinding. Therefore, the
workpiece and the grinding wheel rotational rates are in a fixed
ratio. A non-circular grinding wheel is used to transfer its
geometry onto the workpiece. The authors use a unique machine
tool for basic research and control concept development for
RPM-Synchronous Grinding (RSG). The machine was
especially designed for this RSG technology. Highest revolution
rates on the workpiece spindle are mandatory for its success. The
grinding approach is performed in a two-step process. For
roughing, a highly porous vitrified bonded grinding wheel with
medium grain size is used. It ensures high specific material
removal rates for producing the non-circular geometry on the
workpiece efficiently. A control algorithm adapts this process
step, which uses acquired data from a piezoelectric three-
component force sensor fixed at the tailstock-side of the grinding
machine. For finishing, a grinding wheel with fine grain size is
suited. This process step is tuned by a digital process adaption
strategy. Roughing and finishing are performed consecutively
among the same clamping of the workpiece with two locally
separated grinding spindles.
With the presented control and adaption concepts for RPM-
Synchronous Grinding, a significant increase in surface quality
on the workpiece is attained. The minimization of grinding
wheel wear results concurrently. Especially the automotive
industry shows big interest in RPM-Synchronous Non-Circular
Grinding. This emerging trend in finishing machining opens up
various fields of application.
| Translated title of the contribution | Drehzahlsynchrones Schleifen - Regelungkonzepte zur Verbesserung von Oberflächenqualitäten für ein Hocheffizientes Unrundschleif-Verfahen |
|---|---|
| Original language | English |
| Publication status | Accepted/In press - 10 Sept 2017 |
| Event | ASME 2017 International Mechanical Engineering Congress & Exposition: IMECE 2017 - Tampa, United States Duration: 3 Nov 2017 → 9 Nov 2017 |
Conference
| Conference | ASME 2017 International Mechanical Engineering Congress & Exposition |
|---|---|
| Abbreviated title | ASME - IMECE 2017 |
| Country/Territory | United States |
| City | Tampa |
| Period | 3/11/17 → 9/11/17 |
Activities
- 1 Talk at conference or symposium
-
RPM-Synchronous Grinding-Control Concepts to Improve Surface Qualities for a Highly Efficient Non-Circular Grinding Approach
Matthias Steffan (Speaker) & Franz Haas (Contributor)
6 Nov 2017Activity: Talk or presentation › Talk at conference or symposium › Science to science