Details
| Original language | English |
|---|---|
| Pages (from-to) | 359-364 |
| Number of pages | 6 |
| Journal | Procedia CIRP |
| Volume | 96 |
| Early online date | 10 Feb 2021 |
| Publication status | Published - 2021 |
| Event | 8th CIRP Global Web Conference on Flexible Mass Customisation, CIRPe 2020 - Leuven, Belgium Duration: 14 Oct 2020 → 16 Oct 2020 Conference number: 8 |
Abstract
Zero-point clamping systems are used for safe and reproducible clamping of workpieces and workpiece pallets in machine tools. Due to the high geometric repeatability of the clamping process, re-clamping errors are avoided and thus high accuracy is achieved when machining workpieces on multiple machine tools. In order to avoid errors during clamping, e.g. due to chips between the clamping surfaces, the clamping force as well as the clamping condition must be checked manually. However, this time-consuming work cannot be carried out simultaneously. In order to reduce non-productive times and to increase the process reliability, a sensory zero-point clamping system was developed. The use of sensory zero-point clamping systems enables process-parallel measurement of clamping and process forces as well as the evaluation of the clamping condition. In this paper, a method for the design and integration of strain sensors in zero-point clamping systems is presented and evaluated. For the experimental validation, four sensory zero-point clamping systems are used to clamp a workpiece pallet. The sensory zero-point clamping system is used for process as well as condition monitoring. As an example of process monitoring, the determination of clamping and process forces that occur during milling is presented. Within the scope of the experimental investigations, a clamping force resolution of 32 N and a process forces resolution of 2 N was achieved. Furthermore, the monitoring of different clamping conditions is shown on the basis of the detection of erroneously missing pallets in the machine tool and the existence of foreign objects between the clamping surfaces. It is shown that deviations from the target states of these conditions can be detected. This offers potential to avoid non-productive times and geometry errors of the workpieces.
Keywords
- clamping forces, condition monitoring, process monitoring, sensor integration, zero-point clamping system
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Procedia CIRP, Vol. 96, 2021, p. 359-364.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Sensory zero-point clamping system for condition and process monitoring
AU - Denkena, Berend
AU - Bergmann, Benjamin
AU - Kiesner, Johann
AU - Buhl, Henning
N1 - Conference code: 8
PY - 2021
Y1 - 2021
N2 - Zero-point clamping systems are used for safe and reproducible clamping of workpieces and workpiece pallets in machine tools. Due to the high geometric repeatability of the clamping process, re-clamping errors are avoided and thus high accuracy is achieved when machining workpieces on multiple machine tools. In order to avoid errors during clamping, e.g. due to chips between the clamping surfaces, the clamping force as well as the clamping condition must be checked manually. However, this time-consuming work cannot be carried out simultaneously. In order to reduce non-productive times and to increase the process reliability, a sensory zero-point clamping system was developed. The use of sensory zero-point clamping systems enables process-parallel measurement of clamping and process forces as well as the evaluation of the clamping condition. In this paper, a method for the design and integration of strain sensors in zero-point clamping systems is presented and evaluated. For the experimental validation, four sensory zero-point clamping systems are used to clamp a workpiece pallet. The sensory zero-point clamping system is used for process as well as condition monitoring. As an example of process monitoring, the determination of clamping and process forces that occur during milling is presented. Within the scope of the experimental investigations, a clamping force resolution of 32 N and a process forces resolution of 2 N was achieved. Furthermore, the monitoring of different clamping conditions is shown on the basis of the detection of erroneously missing pallets in the machine tool and the existence of foreign objects between the clamping surfaces. It is shown that deviations from the target states of these conditions can be detected. This offers potential to avoid non-productive times and geometry errors of the workpieces.
AB - Zero-point clamping systems are used for safe and reproducible clamping of workpieces and workpiece pallets in machine tools. Due to the high geometric repeatability of the clamping process, re-clamping errors are avoided and thus high accuracy is achieved when machining workpieces on multiple machine tools. In order to avoid errors during clamping, e.g. due to chips between the clamping surfaces, the clamping force as well as the clamping condition must be checked manually. However, this time-consuming work cannot be carried out simultaneously. In order to reduce non-productive times and to increase the process reliability, a sensory zero-point clamping system was developed. The use of sensory zero-point clamping systems enables process-parallel measurement of clamping and process forces as well as the evaluation of the clamping condition. In this paper, a method for the design and integration of strain sensors in zero-point clamping systems is presented and evaluated. For the experimental validation, four sensory zero-point clamping systems are used to clamp a workpiece pallet. The sensory zero-point clamping system is used for process as well as condition monitoring. As an example of process monitoring, the determination of clamping and process forces that occur during milling is presented. Within the scope of the experimental investigations, a clamping force resolution of 32 N and a process forces resolution of 2 N was achieved. Furthermore, the monitoring of different clamping conditions is shown on the basis of the detection of erroneously missing pallets in the machine tool and the existence of foreign objects between the clamping surfaces. It is shown that deviations from the target states of these conditions can be detected. This offers potential to avoid non-productive times and geometry errors of the workpieces.
KW - clamping forces
KW - condition monitoring
KW - process monitoring
KW - sensor integration
KW - zero-point clamping system
UR - http://www.scopus.com/inward/record.url?scp=85101181178&partnerID=8YFLogxK
U2 - 10.1016/j.procir.2021.01.100
DO - 10.1016/j.procir.2021.01.100
M3 - Conference article
AN - SCOPUS:85101181178
VL - 96
SP - 359
EP - 364
JO - Procedia CIRP
JF - Procedia CIRP
SN - 2212-8271
T2 - 8th CIRP Global Web Conference on Flexible Mass Customisation, CIRPe 2020
Y2 - 14 October 2020 through 16 October 2020
ER -