Residual Stresses and Surface Roughness Analysis of Truncated Cones of Steel Sheet Made by Single Point Incremental Forming
- Resource Type
- Authors
- Tomasz Trzepieciński; Andrzej Kubit; Miroslav Neslušan; Wojciech Bochnowski; Ján Slota; Kazimiera Dudek; Bogdan Krasowski
- Source
- Metals
Volume 10
Issue 2
Metals, Vol 10, Iss 2, p 237 (2020)
- Subject
- lcsh:TN1-997
0209 industrial biotechnology
Materials science
incremental sheet forming
truncated cone
Metals and Alloys
Forming processes
02 engineering and technology
Conical surface
021001 nanoscience & nanotechnology
Cracking
020901 industrial engineering & automation
Residual stress
mechanical engineering
Surface roughness
General Materials Science
SPIF
Composite material
Deep drawing
0210 nano-technology
lcsh:Mining engineering. Metallurgy
Incremental sheet forming
Tensile testing
- Language
- ISSN
- 2075-4701
The dimensional accuracy and mechanical properties of metal components formed by the Single Point Incremental Forming (SPIF) process are greatly affected by the prevailing state of residual stress. An X-ray diffraction method has been applied to achieve an understanding of the residual stress formation caused by the SPIF process of deep drawing a quality steel sheet drawpiece. The test object for an analysis of residual stress distribution was a conical truncated drawpiece with a slope angle of 71°
and base diameter of the cone of 65 mm. The forming process has been carried out on a 3-axis HAAS TM1P milling machine. Uniaxial tensile tests have been carried out in the universal tensile testing machine to characterize the material tested. It was found that the inner surface of the drawpiece revealed small linear grooves as a result of the interaction of the tool tip with the workpiece. By contrast, the outer surface was free of grooves which are a source of premature cracking. The stress profile exhibits a nonlinear distribution due to different strengthening of the material along the generating line of the truncated conical drawpiece. The SPIF parts experienced a maximum residual stress value of about 84.5 MPa.