scholarly journals Evaluation of accuracy of seamless steel tube scanning by industrial computed tomography

2019 ◽  
Vol 299 ◽  
pp. 04009 ◽  
Author(s):  
Michaela Kritikos ◽  
Ivan Buranský ◽  
Eva Buranská ◽  
Milan Mojžiš
Keyword(s):  
Computed Tomography ◽  
Coordinate Measuring Machine ◽  
Steel Tube ◽  
Outer Diameter ◽  
X Ray ◽  
Industrial Computed Tomography ◽  
Measuring Machine ◽  
Seamless Steel Tube ◽  
Different Diameters ◽  
Seamless Steel

Measurement by computed tomography is very useful in evaluation of dimensions and internal structure. There are still some problems which need to be solved. Scanning accuracy depends, among other things, on the part´s material. Metal parts have high density and their scanning leads many times to failure. This paper deals with evaluation of accuracy of seamless steel tube scanning by industrial computed tomography. This method of scanning can lead to substitution of destructive method for measurement,but it is necessary to have knowledge if the scan has required accuracy. The tube with different diameters in length is scanned by X-Ray beam and it is evaluated inner and outer diameter, concentricity and wall thickness in 8 sections. The accuracy of scan is compared with reference values achieved by coordinate measuring machine in the same sections.

Development of Dimensional X-Ray Computed Tomography

2015 ◽  
Vol 9 (5) ◽  
pp. 567-571 ◽  
Author(s):  
Hiroyuki Fujimoto ◽  
◽  
Makoto Abe ◽  
Sonko Osawa ◽  
Osamu Sato ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Coordinate Measuring Machine ◽  
National Metrology Institute ◽  
Maximum Deviation ◽  
Dimensional Metrology ◽  
X Ray ◽  
Tomography System ◽  
Dimensional Measurements ◽  
X Ray Computed ◽  
Measuring Machine

Recently, a strong need has arisen for a dimensional X-ray computed tomography system that is capable of dimensional measurements. This is because the speedy realization of dimensional measurements for outward forms and inward forms on dense spatial points remarkably simplifies and accelerates production loop. However, although the image obtained via XCT describes the structure clearly and in great detail, dimensional metrology by means of XCT is not simple. The National Metrology Institute of Japan has been carrying out performance tests using gauges that include the gauges proposed in ISO10360. In this work, the magnification variation correction is carefully presented, and a maximum deviation of less than 5 μm is shown to be possible by means of the measurement of the forest phantom of 27 ruby spheres, the locations of which are calibrated by the coordinate measuring machine.

Stretch reduction of seamless steel tube by skew rolling and its numerical simulation

2016 ◽  
Vol 113 (3) ◽  
pp. 307 ◽  
Author(s):  
Chunjiang Zhao ◽  
Yongfeng Liu ◽  
Lei Bai ◽  
Nan Wang ◽  
Xin Gao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Steel Tube ◽  
Seamless Steel Tube ◽  
Skew Rolling ◽  
Seamless Steel

scholarly journals The Effect of the Holding Pressure Profile on the Metal Injection Molded Component Dimensions after Sintering

2020 ◽  
Vol 14 (4) ◽  
pp. 423-427
Author(s):  
Emir Šarić ◽  
Samir Butković ◽  
Muhamed Mehmedović
Keyword(s):  
Injection Molding ◽  
Coordinate Measuring Machine ◽  
Volumetric Flow Rate ◽  
Pressure Profile ◽  
Metal Injection Molding ◽  
Injection Velocity ◽  
Outer Diameter ◽  
N2 Atmosphere ◽  
Measuring Machine ◽  
Injection Molded

The volumetric flow rate (injection velocity) and the holding pressure are metal injection molding (MIM) parameters that have a strong influence on the green parts density and density homogeneity, but their effect on sintered dimensions after sintering is still to a large extent unexplored. To reveal the relationship between the injection molding parameters and sintered dimensions, ring-shaped components were injection molded by using different values of injection velocities in combination with a rump-down and rumpup holding pressure profile. Afterwards, the green components were catalytically debound and sintered in the nitrogen (N2) atmosphere. Finally, the component dimensions: the height, inner and outer diameter were measured by using a coordinate measuring machine. The ready-to-mold granules Catamold 310N made of heat resistant stainless steel X40CrNiSi 25-20 (according to the EN standard) powder and polyacetal based binder were used. The results showed that the interaction between the injection velocity and the holding pressure profile can be used to systematically adjust shrinkage after sintering. This approach is based on the dependence of the binder crystallization temperature on pressure, when the powder/binder proportion changes with the injection velocity.

scholarly journals Development of non-decarburized Repetitive Heat Treatment for A Ball Bearing Seamless Steel Tube.

Materia Japan ◽  
1994 ◽  
Vol 33 (5) ◽  
pp. 647-649
Author(s):  
Yasutaka Okada ◽  
Nobuo Otsuka ◽  
Takashi Morikawa ◽  
Yasuhide Fujioka ◽  
Seiji Tanimoto
Keyword(s):  
Heat Treatment ◽  
Ball Bearing ◽  
Steel Tube ◽  
Seamless Steel Tube ◽  
Seamless Steel
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