Work

Development of a clamping system with piezo-actuators for high-precision positioning and force control for micro-machining

Year: 2026

Type: article

Abstract: Improving clamping accuracy and controlling workpiece deformation during micro-machining require adaptation of holding forces as to the cutting forces and workpiece geometry. The available devices have a position accuracy of + /- 1 µm, however with lower and limited precision and repeatability when re-clamping. The developed and presented high-precision system achieves two goals: accurate repositioning and force-controlled clamping of < 20 N. The system, described in the paper, with three independent linear piezo-electric actuators, is controlled by a position and force algorithm, combined with a camera and a pattern recognition algorithm to identify workpiece positions and to accomplish feedback control. It was shown that controlling holding forces, position, and motion of each clamping jaw, can allow secure and accurate repositioning with a repeatability of 2–3 µm for controlled deformation in micro-machining.

Source: CIRP journal of manufacturing science and technology

DOI: 10.1016/j.cirpj.2026.06.001

Authors: Avi Weiss, Uri Ben-Hanan, Udo Eckert, Rafi Wertheim

Institutions: Braude College of Engineering Karmiel, Fraunhofer Institute for Machine Tools and Forming Technology

Language: English

Topic: Piezoelectric Actuators and Control

Subfield: Control and Systems Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,950

Funder: AiF Projekt