Abstract
The contribution dealing with analysis of drawing die shape distortion using optical 3D scanning. The wear of drawing die has a significant influence on the shape stability of the produced tubes. Early identification and determination of wear on the drawing die leads to elimination of production errors. Metrological measuring systems can be used to analyse shape distortion. The optical 3D scanner GOM ATOS II TripleScan SO MV170 (measuring volume: 170 × 130 × 130 mm; camera resolution 2448 × 2050 px (5 Mpx); measuring point distance: 0.07059 mm) was used for experimental measurement of drawing die. The 3D scanned weared drawing die was compared with the reference CAD model. The result of the comparison is the colour deviation map of drawing die’s shape and various inspection sections.
Highlights
Tubes are made of various materials, in different sizes and by different manufacturing technologies
The contribution describes the suitability of using the optical 3D scanner GOM ATOS to measure the shape distortion of drawing die caused by tool wear
Experimental measurements of the drawing die were performed by the optical 3D scanner GOM ATOS II TripleScan SO MV170, which is available at Centre of Excellence of 5-Axis Machining at the Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava (Fig. 3)
Summary
Tubes are made of various materials, in different sizes and by different manufacturing technologies. In addition to steel tubes, carbon fiber tubes (and tubular parts) are being produced nowadays [1, 2]. The aforementioned drawing die is a tool for production of seamless tubes made of steel by precision cold drawing (without mandrel - Fig. 1 - left, Fig. 2). It is very important to establish when the limit tool wear occurs in the case of tube production. Knowledge of tool wear process would allow better use of high strength steels or other materials for tool production. Higher forces cause premature adhesion and abrasive wear, thereby shortening tool life. Another advantage would be that there was no overproduction of tools. D1 - Hole diameter d2 - Nib diameter D - Casing diameter b - Nib height z - Bearing length
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