Cutting Edge-Cross Sections Loader Straight

2006 ◽  
Author(s):  
Keyword(s):  
Cross Sections ◽  
Cutting Edge

scholarly journals A Coupled Eulerian-Lagrangian Simulation and Tool Optimization for Belt Punching Process with a Single Cutting Edge

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5406
Author(s):  
Dominik Wojtkowiak ◽  
Krzysztof Talaśka ◽  
Dominik Wilczyński ◽  
Jan Górecki ◽  
Krzysztof Wałęsa
Keyword(s):  
Cross Sections ◽  
Cutting Edge ◽  
Machining Process ◽  
Analytical Models ◽  
Geometrical Parameters ◽  
Lagrangian Simulation ◽  
Blade Thickness ◽  
Geometrical Features ◽  
Punching Process ◽  
Tool Optimization

The objective of this paper is to analyze the belt punching process with the use of a single cutting edge and discuss the influence of geometrical features of the piercing punch on the perforation force. Two basic shapes of the piercing punch with a single cutting edge were tested: tools with the blade pointing inside or pointing outside. The analytical models of the stress distribution in the shearing cross sections were derived for both punches. The presented model, along with the series of empirical tests and Coupled Eulerian-Lagrangian simulation, was used for finding the effective geometry of the piercing punch with a single cutting edge for the belt perforation. The geometrical parameters taken into consideration for the tool optimization were the following: angle of the blade, thickness of the wall and diameter of the piercing punch cutting edge. The obtained results show that changing these parameters has a significant influence on the perforation force necessary to execute the machining process and affects the quality of the holes in the perforated belts. The most important geometrical features of the hollow sharpened punch are the angle and the direction of the blade, which change the force distribution and, as a result, the mechanics of the process.

Proposal of Contour Line Model for High-Speed End Milling Simulation

2020 ◽  
Vol 14 (1) ◽  
pp. 38-45 ◽  
Author(s):  
Isamu Nishida ◽  
◽  
Keiichi Shirase
Keyword(s):  
Cutting Force ◽  
Cross Sections ◽  
High Speed ◽  
End Milling ◽  
Cutting Edge ◽  
Contour Line ◽  
Memory Usage ◽  
Line Model ◽  
Milling Simulation ◽  
Contour Lines

A contour line model for end milling simulation, which realizes high-speed arithmetic processing by reducing memory usage, is proposed. In this model, a 3-dimensional shape can be expressed by superimposing the contour lines of the cross-sections obtained by dividing the workpiece along any axial direction. Therefore, the memory usage is reduced compared to a Z-map model or a voxel model as the interior information of the object can be eliminated. The contour line model can also be applied to complicated shapes having overhangs. Furthermore, cutting volume can be calculated from the interference area enclosed by two contour lines of the workpiece and the tool cross-sections. The workpiece shape can be changed by eliminating the interference area. In the contour line model, cutting force can also be predicted with an instantaneous rigid force model using the uncut chip thickness for each cutting edge from the positional relationship between the interference area and the cutting edge. To validate the proposed model, cutting experiments were conducted, which confirmed that the predicted machining shape had good agreement with the actual machined shape. Furthermore, it was confirmed that the cutting force can be predicted accurately.

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