Title Dataset: Tool Wear Experiment Dataset for the Evaluation of Sensor Informativeness in Longitudinal Turning (ExtraDrey)
Dataset DOI: https://doi.org/10.15480/882.17237
Publication DOI: 10.1515/zwf-2026-1068
Author: Sebastian Schibsdat, sebastian.schibsdat@gmx.de, ORCID: 0009-0001-0605-9754 , affiliation: Hamburg University of Technology - Institute of Production Management and Technology
Dataset creation date: 01.06.2026
Version: 1.0
License: Public Domain Mark 1.0 Universal
Context: Investigation of the wear behaviour of coated indexable inserts in CNC longitudinal turning. Multi-sensor process signals are recorded together with interval microscopy of the cutting tool to study the informativeness of different sensors for predicting flank wear (VB_Max).
Acknowledgement: This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – 521385417 (SPP 2402 - Greybox models for the qualification of coated tools for high-performance cutting, subproject D2: Extrapolative digital greybox models for describing and predicting the macroscopic system behavior of TiAlN-coated cutting tools)

Structure of the dataset:
The data is organised per tool edge. Each tool edge (CT0XX_Y) is packed into its own uncompressed .tar archive. The readme, the mask label definition and the experiment documentation spreadsheet are provided unpacked next to the archives.

- CT0XX_Y.tar  (one per tool edge, 67 edges total)
  Each archive extracts to a single folder CT0XX_Y/ containing:
    CT0XX_Y/
      Experiment_Data/   sensor .mat files of all experiments run on this edge
      Images/
        Image/      microscope images
        Mask/       segmentation masks (sparse - not every image has a mask)
        Heightmap/  extracted heightmaps (gzip-compressed CSV)

- LabelDefinition.txt
  Class labels used in the segmentation masks (e.g. Background, Flank_Wear,
  Crater_Wear, Breakage, Tool_Area, Adhesion).

- Experiment_Documentation.xlsx
  Combined metadata of all experiments (identical to the MetaData stored inside the
  .mat files). Experimenter names have been removed; the VB_Max (maximum flank wear)
  column is populated.

Information about the data:

- Images: [CT0XX_Y_Zs_AAB.jpg]
  Microscope images taken in intervals including 0 s.
  CT = Cutting Tool,
  XX = Cutting Tool Number,
  Y  = Cutting Edge Number,
  Z  = Time in use [s],
  AA: FF = Free Flank, CE = Cutting Edge, RF = Rake Face
  B : [] = 150x Magnification (Standard), L = 100x Magnification

- Masks: [CT0XX_Y_Zs_AA_mask.png]
  Pixel-wise segmentation masks of the corresponding microscope image. Not every
  image has a mask. Class labels are defined in LabelDefinition.txt.

- Heightmaps: [CT0XX_Y_Zs_AA_3D.csv.gz]
  Extracted heightmap of the microscope image, stored as a gzip-compressed CSV.
  Naming follows the image convention.

- Experiment_Data: [ES0XX_YYY_Data.mat]
  Sensor data of the experiments (30 s cutting) combined, synchronised and enhanced.
  Metadata included. Experimenter names removed; VB_Max filled in the MetaData.
  File format: MAT-File Version 7.3 (HDF5-based format)
  Data structure:
  - MetaData (struct)
  -- Data (cell)
  -- Description (cell)
  - SensorNI (struct)
  -- Data (cell)
  -- Description (cell)
  - SensorOptosurf (struct)
  -- Data (cell)
  -- Description (cell)
  - SensorQUASS (struct)
  -- Data (cell)
  -- Description (cell)