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Precision Measurement and Machining Lab
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The lab makes machine tools smarter to improve the precision of manufacturing.
AboutAbout the lab
Production and machining technology that supports manufacturing sites
The Precision Measurement and Machining Lab researches ways to advance the machining technology that supports the manufacturing industry.
Centered on NC machine tools, it researches and develops methods for automating and making intelligent the various systems built around them.
Its important themes include autonomy and intelligence in machining, such as turning the skills and experience of skilled engineers into systems and making die and mold machining intelligent.
It also tackles the research and development of high-precision positioning and of machine tools with new mechanisms from various perspectives.
Key terms
- NC machine tool
- A machine that performs machining by automatically controlling the motion of the cutting tool and workpiece through commands given as numerical data
- End mill
- A cutting tool that rotates to cut the sides, grooves, and other features of a material
- Contact damping
- The property by which vibration energy is lost at the surface where parts touch, so that shaking dies down
ResearchResearch themes
Aiming to advance the production and machining technology that supports manufacturing sites, the lab works on research and development of automation and intelligence of systems centered on NC machine tools, high-precision positioning, and machine tools with new mechanisms.
*Illustrative imagePredicting Machined Surface Shape from Cutting Force
In metal machining, tool runout and workpiece vibration make it difficult to predict the machined surface shape from cutting conditions alone. The lab built a simulator that determines the changes in the thickness of material removed from the cutting force of an end mill and estimates the machined surface shape.
*Illustrative imageMeasuring Machine Tool Motion Errors with Cameras
Methods that measure the motion errors of machine tools using motion-capture images are attracting attention. When measuring squareness in a circular motion accuracy test, the lab evaluated through experiments and simulations how factors such as camera setup error affect accuracy.
*Illustrative imagePredicting Vibration of Structures with Contact Interfaces
The stiffness of the contact interfaces joining machine components and how quickly vibration dies out there greatly affect the vibration of the whole machine, but they are difficult to estimate. The lab is developing a method that replaces the area near the contact interface with a virtual material and estimates how prone the structure is to vibration using the finite element method.
*Illustrative imageVibration Characteristics of Metal-to-Metal Contact Interfaces
The contact stiffness and contact damping of the surfaces joining parts determine the machining accuracy of machine tools. The lab proposed a model that simulates the deformation of microscopic asperities on contact surfaces to predict the stiffness and damping of the whole interface, and verified it through X-ray CT observation.
MembersFaculty
- Associate ProfessorDaisuke Kono
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Cell CNC faipari megmunkálóközpont” Horvathb.mautom / CC BY-SA 4.0 (cropped)
- Predicting Machined Surface Shape from Cutting Force: “A Day in the Life of a Metals Tech (5959287)” U.S. Air Force photo by Airman Thomas Keisler / Public domain (cropped)
- Measuring Machine Tool Motion Errors with Cameras: “Okuma MULTUS U3000 multi-tasking machine with automatic tool changer” Whoisjohngalt / CC BY-SA 4.0 (cropped)
- Predicting Vibration of Structures with Contact Interfaces: “Vibration testing” Austin Downey / CC BY-SA 4.0 (cropped)
- Vibration Characteristics of Metal-to-Metal Contact Interfaces: “Bolted joint bridge” Thermos / CC BY-SA 3.0 (cropped)
- Related lab (Nano and Micro Systems Engineering Lab): “A MicroVision MEMS mirror” S2upidOnReddit / CC BY-SA 4.0 (cropped)
- Related lab (Mechanism and Motion Engineering Lab): “Camera on Curiosity's Robotic Arm” NASA / Public domain (cropped)
- Related lab (Functional Structural Mechanics Lab): “Ultrasonic pipeline test” w:en:User:Davidmack / Public domain (cropped)
- Related lab (Functional Machine Elements Engineering Lab): “Ball-bearing-numbered” Niabot / CC BY-SA 3.0 (cropped)
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