The Influence of graphite, MOS2 and Blasocut lubricant on hole and chip geometry during peck drilling of aerospace alloy

2020 ◽  
Vol 24 ◽  
pp. 690-697 ◽  
Author(s):  
A.V. Sandeep reddy ◽  
S. Ajay kumar ◽  
T. Jagadesh
Keyword(s):  
Chip Geometry ◽  
Peck Drilling

A Finite Element Model of Orthogonal Metal Cutting

1985 ◽  
Vol 107 (4) ◽  
pp. 349-354 ◽  
Author(s):  
J. S. Strenkowski ◽  
J. T. Carroll
Keyword(s):  
Finite Element ◽  
Plastic Strain ◽  
Residual Stresses ◽  
Finite Element Model ◽  
Metal Cutting ◽  
Element Model ◽  
Effective Plastic Strain ◽  
Orthogonal Metal Cutting ◽  
Chip Separation ◽  
Chip Geometry

A finite element model of orthogonal metal cutting is described. The paper introduces a new chip separation criterion based on the effective plastic strain in the workpiece. Several cutting parameters that are often neglected in simplified metal-cutting models are included, such as elastic-plastic material properties of both the workpiece and tool, friction along the tool rake face, and geometry of the cutting edge and workpiece. The model predicts chip geometry, residual stresses in the workpiece, and tool stresses and forces, without any reliance on empirical metal cutting data. The paper demonstrates that use of a chip separation criterion based on effective plastic strain is essential in predicting chip geometry and residual stresses with the finite element method.

Using Image Analysis Techniques for Single Evaluation of the Chip Shrinkage Factor in Orthogonal Cutting Process

2012 ◽  
Vol 504-506 ◽  
pp. 1329-1334 ◽  
Author(s):  
Moises Batista ◽  
Madalina Calamaz ◽  
Franck Girot ◽  
Jorge Salguero ◽  
Mariano Marcos
Keyword(s):  
High Speed ◽  
Orthogonal Cutting ◽  
Rake Angle ◽  
Cutting Process ◽  
Shrinkage Factor ◽  
A Value ◽  
Chip Shrinkage ◽  
Chip Geometry ◽  
Image Analysis Techniques

The forces involved in a cutting process are related, for example, with the power consumption, with the final quality of the workpiece and with the chip geometry obtained, since these forces determine the compression experimented by the chip and therefore its final geometry. The orthogonal cutting process assisted with a High Speed Filmation (HSF) permit obtains a digital filmation of the process with high magnification. This filmation permits to obtain a measurement of the longitudinal changes produced in the chip. This deforms are related with the Shrinkage Factor, ζ. And in this case the Stabler hypothesis is enabled, by that using the shear angle and the rake angle is possible obtain a value of the Shrinkage Factor in a different conditions.

Effect of Process Parameters on Hole Diameter Accuracy in High Pressure Through Coolant Peck Drilling Using Taguchi Technique

2018 ◽  
Vol 5 (1) ◽  
pp. 12-31 ◽  
Author(s):  
Hanmant V. Shete ◽  
Madhav S. Sohani
Keyword(s):  
Feed Rate ◽  
High Performance ◽  
Manufacturing Industry ◽  
Spindle Speed ◽  
Hole Diameter ◽  
Taguchi Technique ◽  
Machining Center ◽  
Analysis Of Results ◽  
Optimal Values ◽  
Peck Drilling

Machining with pressurized coolant is nowadays widely accepted technique in the manufacturing industry, especially in high performance machining conditions. The data on the effects of variation of high coolant pressure in drilling operation is limited. This paper presents the effect of high coolant pressures along with spindle speed, feed rate and peck depth on hole diameter accuracy. Experiments were performed on EN9 steel with TiAIN coated through coolant drill on CNC vertical machining center. Taguchi technique was employed for design of experiments and analysis of results. Results showed that the higher values of optimal coolant pressure and spindle speed were demanded for drilling at bottom of hole as compared to that for drilling at top of hole. The optimal values of feed rate and peck depth were same for both the cases of drilling at top and bottom of hole. Use of high coolant pressure in drilling permits higher peck depth for better hole diameter control which results in reduced cycle time and hence production cost.

scholarly journals Microwave probing of bulk dielectrics using superconducting coplanar resonators in distant-flip-chip geometry

2020 ◽  
Vol 91 (5) ◽  
pp. 054702
Author(s):  
Lars Wendel ◽  
Vincent T. Engl ◽  
Gabriele Untereiner ◽  
Nikolaj G. Ebensperger ◽  
Martin Dressel ◽  
...  
Keyword(s):  
Flip Chip ◽  
Chip Geometry
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