scholarly journals Detection of Screw Threads in Computed Tomography 3D Density Fields

2013 ◽  
Vol 13 (6) ◽  
pp. 292-297 ◽  
Author(s):  
S. Kosarevsky ◽  
V. Latypov
Keyword(s):  
Computed Tomography ◽  
Measurement Process ◽  
New Method ◽  
Screw Thread ◽  
Inspection Process ◽  
Measurement Devices ◽  
Screw Threads

Abstract Measurements and inspection in production must be rapid, robust and automated. In this paper a new method is proposed to automatically detect screw threads in 3D density fields obtained from computed tomography measurement devices. The described method can be used to automate many operations during screw thread inspection process and drastically reduce operator’s influence on the measurement process resulting in lower measurement times and increased repeatability.

scholarly journals Computed Tomography Perfusion: A New Method to Evaluate Response to Therapy in Lung Cancer

2011 ◽  
Vol 6 (9) ◽  
pp. 1599-1600 ◽  
Author(s):  
Francesco Fraioli ◽  
Simone Vetere ◽  
Marco Anile ◽  
Federico Venuta
Keyword(s):  
Computed Tomography ◽  
Lung Cancer ◽  
Response To Therapy ◽  
New Method ◽  
Computed Tomography Perfusion

scholarly journals A new method to trace colloid transport pathways in macroporous soils using X‐ray computed tomography and fluorescence macrophotography

2019 ◽  
Vol 70 (3) ◽  
pp. 431-442 ◽  
Author(s):  
Diego Soto‐Gómez ◽  
Paula Pérez‐Rodríguez ◽  
Laura Vázquez Juíz ◽  
José E. López‐Periago ◽  
Marcos Paradelo Pérez
Keyword(s):  
Computed Tomography ◽  
New Method ◽  
Colloid Transport ◽  
Transport Pathways ◽  
X Ray ◽  
X Ray Computed

scholarly journals A new method for estimating three-dimensional movement of the patella using a surface mapping method and computed tomography

Heliyon ◽  
2020 ◽  
Vol 6 (8) ◽  
pp. e04729
Author(s):  
Takuma Inai ◽  
Tomoya Takabayashi ◽  
Satoshi Watanabe ◽  
Masahiro Ikezu ◽  
Fumiya Kaneko ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Mapping Method ◽  
New Method ◽  
Surface Mapping

Extended Geometric Filter for Reconstruction as a Basis for Computational Inspection

2008 ◽  
Author(s):  
Alexander Miropolsky ◽  
Anath Fischer
Keyword(s):  
Quality Control ◽  
Computer Model ◽  
Large Scale ◽  
Manufacturing Industry ◽  
New Method ◽  
Reconstruction Methods ◽  
Object Based ◽  
Inspection Process ◽  
Important Quality ◽  
Scan Data

Inspection of machined objects is one of the most important quality control tasks in the manufacturing industry. Contemporary scanning technologies have provided the impetus for the development of computational inspection methods, where the computer model of the manufactured object is reconstructed from the scan data, and then verified against its design computer model. Scan data, however, is typically very large scale (i.e. many points), unorganized, noisy and incomplete. Therefore, reconstruction is problematic. To overcome the above problems the reconstruction methods may exploit diverse feature data, that is, diverse information about the properties of the scanned object. Based on this concept, the paper proposes a new method for de-noising and reduction of scan data by Extended Geometric Filter (EGF). The proposed method is applied directly on the scanned points and is automatic, fast and straightforward to implement. The paper demonstrates the integration of the proposed method into the framework of the computational inspection process.

Screws and Screwing

1951 ◽  
Vol 164 (1) ◽  
pp. 52-67
Author(s):  
C. Eatough
Keyword(s):  
Simple Formula ◽  
Mathematical Treatment ◽  
Screw Thread ◽  
Thread Profile ◽  
Tool Profile ◽  
Wide Range ◽  
Screw Threads

The paper describes the various commercial methods of producing screw threads by cutting, rolling, grinding, and milling. The operating principles on which the several processes depend are dealt with and their advantages and limitations are discussed. A workshop method of determining the torque required for tapping and for threading is described, and a chart based on the results gives figures suitable for determining the power of machines to undertake the tapping or screwing of a wide range of work. A mathematical treatment of the clearance between the flanks of a tool and a screw thread is given. This permits the investigation of clearances at any point on the tool profile or flank, and enables relief and tilt angles to be chosen to suit various conditions of lead, thread profile, and diameter for both internal and external threads. For design purposes, a simple formula is available which gives clearance angles in relation to the portions of the tools most subject to interference.

Sign in / Sign up

Export Citation Format

Share Document