Comparative Analysis of Geometrical Characteristics of a Test Specimen for Testing the Tensile Strength Before and After Punch Sharpening


In the present article, a comparative analysis of the widths and thicknesses of a test specimen prepared by punching a hydraulic press before and after sharpening the guillotine blades is made. The types of characteristics of the punch are considered. The comparative analysis was performed by a non-destructive method using a 3D computed tomography.



  1. European standard - Metallic materials- Tensile testing- Part 1: Method of test at room temperature (EN ISO 6891-1:2009)J. Clerk
  2. Roidev М., Georgieva V., Stoimenov N., Klochkov L., Panev P., Development of an automatic packaging line with single pack, XXV International Scientific and Technical Conference „ADP – 2016” 23- 26 June, Sozopol 2016., ISSN – 13 10 -3946, 2016, pp.232-239. (2016)
  3. Hristov S., Testing and Flaw Detection of Metals, Technika, (1988)
  4. Kazakova S., Kamenova I., Klochkov L., Stoimenov N., Popov B., Sokolov B., Application of 3D Industrial Tomography In Dental Medicine., International Scientific Conference “Industry 4.0”, 13-16 December 2017, Borovets, Bulgaria, pp. 187-190, ISSN: 2535-0021 (Print), 2535-003X (Online), Publisher: Scientific Technical Union of Mechanical Engineering Industry – 4.0 (2017)
  5. Nicon Metrology Brochure – Scanning/

Article full text

Download PDF