NEWS

Designing, manufacturing, and testing both a single point, and rotational spindle grinding wheel dressing tools.

06/10/2021

CEDRAT

October, 2021

CEDRAT TECHNOLOGIES SA (CTEC) is a high-tech SME involving more than 50 employees based in the French Innovation Valley, close to Grenoble, in the French Alps.

Specializing in smart actuators based on, piezoelectric ceramics, magneto-strictive alloys, magnetorheological fluids, and magnetic effects. Together with sensors, such as ECS and strain gauges, together with full mechatronic systems, offering multi-degree-of-freedom mechanisms, such as XY stages, 2 axis tilt systems, precision motion control, active damping, and energy recovery etc. And finally, technological training courses, dedicated to engineers and technicians who wish to learn or improve, their knowledge in mechatronic products, systems, and technologies.

Figure 1: Left: CTEC actuator solutions – displacement v force. Right: Full mechatronic system, including actuators, electronics, and PC driven control.

Backed by years of experience, CTEC’s extensive R&D activities are conducted by a multidisciplinary team of experts. Its laboratories are equipped with a complete library of engineering software and specialized measurement apparatus. Between standard products and customized solutions, CTEC provides existing “building blocks” to move quicker from specifications to a complete optimized design and operating prototypes. Widely applied for precise and rapid actuation, optics, instrumentation and control of vibrations, mechatronic products based on smart materials meet the most stringent specifications for aerospace and industry.

Within the project InterQ CTEC, working with Ideko and Danobat will take the lead in designing, manufacturing, and testing both a single point, and rotational spindle grinding wheel dressing tools.

Friction within machine tools, predominantly between the guideways and slides has a significant cost both environmentally and financially. The result is a decrease in performance and repeatability and an increase in energy consumption and waste.

One option to reduce friction lies in texturing. A traditional technique, it is the process currently in use for machine tool guideways, however, it is highly costly in which the final finish of the workpiece is not controllable and relies on the experience of the skilled worker. Therefore, the main challenge is to develop an industry-implemented technique capable of producing textures in a repetitive and economically viable way.

Figure 2: Left: Textured machine guideway. Right: Detail of hand textured surface. (Images courteous of Ideko S. Coop).

The objective for CTEC is to look at automating the manual process of flaking by imparting a textured surface onto grinding wheels via a dressing tool where the displacement of the dressing tool is precisely controlled within microns. The textured grinding wheel is then used to transfer the textured profile onto the workpiece, such as machine tool guideways and to do it in a repetitive and precise manner.

Figure 3: Left: Full automated texturing system. Right: Textured grinding wheel and corresponding textured surface. (Images courteous of Ideko S. Coop).

Due to the complexity involved in precisely moving the dressing tool across strokes of up to 60µm and speeds of 1kHz two tools will be developed. During the first year a single point dressing tool with a single degree of freedom will be designed, manufactured, and tested. During years two and threes an existing rotational dressing tool from Danobat will be modified with, one, two or possible three degree(s) of freedom depending on the test results of the single point tool, manufactured, and tested.