scholarly journals TRACKING WORKPIECE STABILITY UNDER VARYING CUTTER POSITIONS, MASS AND COMPLIANCE OF WORKPIECE IN POCKET MILLING

2016 ◽  
Vol 05 (25) ◽  
pp. 132-138
Author(s):  
Jamdar S.B .
Keyword(s):  
Pocket Milling ◽  
Workpiece Stability

Studi implementasi cad/cam pada proses milling cnc terhadap kekasaran permukaan dan tingkat kepresisian aluminium 6061

2018 ◽  
Vol 11 (1) ◽  
pp. 36
Author(s):  
Risdiyanto Edy Saputro ◽  
Indri Yaningsih ◽  
Heru Sukanto
Keyword(s):  
Face Milling ◽  
Pocket Milling ◽  
Slot Milling ◽  
Cad Cam ◽  
Thread Milling

Penelitian ini dilakukan untuk mengetahui pengaruh penerapan CAD /CAM terhadap proses penggilingan CNC terhadap kekasaran dan ketelitianpermukaan. Spesimen dibuat dengan menggunakan tujuh jenis prosespemotongan. Terdapat face milling, pocket milling, profile milling, slotmilling, pengeboran, thread milling dan surface contouring. Hasil penelitianmenunjukkan bahwa penerapan CAD / CAM dengan variasi prosespemotongan menghasilkan nilai kekasaran yang lebih rendah daripadatanpa penerapan CAD / CAM. Nilai kekasaran permukaan untuk masingmasingproses pemotongan adalah proses face milling (0,5028 μm; 0,5132μm), slot milling (0.664 μm; 0.6556 μm), profile milling (1.282 μm; 1.3128μm), pocket milling (1.3852 μm; 1.4856 μm ) Dan proses pengeboran(1.9944 μm; 2.1136 μm). Nilai rata-rata dimensi dari pengukuranmenunjukkan selisih antara hasil implementasi CAD / CAM dan tanpaimplementasi CAD / CAM. Persentase perbedaan panjang dan lebarmasing-masing 0,037%; 0,059% untuk profile milling; 0,039%; 0,061%untuk pocket milling; Dan 0.151%; 0,317% untuk pengeboran Penggunaanstatistik penerapan CAD / CAM tidak secara signifikan mempengaruhi nilaikekasaran permukaan namun memiliki pengaruh signifikan terhadapketepatan produk dengan tingkat presisi 95%.

An Algorithm for a Near Optimal NC Path Generation in Staircase (Lase) Traversal of Convex Polygonal Surfaces

1999 ◽  
Vol 122 (1) ◽  
pp. 182-190 ◽  
Author(s):  
S. V. Kamarthi ◽  
S. T. S. Bukkapatnam ◽  
S. Hsieh
Keyword(s):  
Rapid Prototyping ◽  
Path Length ◽  
Tool Path ◽  
Path Generation ◽  
Convex Polygons ◽  
Sweep Angle ◽  
Pocket Milling ◽  
Different Shapes ◽  
Path Lengths ◽  
Better Than

This paper presents an analytical model of the tool path for staircase traversal of convex polygonal surfaces, and an algorithm—referred to as OPTPATH—developed based on the model to find the sweep angle that gives a near optimal tool path length. The OPTPATH algorithm can be used for staircase traversal with or without (i) overlaps between successive sweep passes, and (ii) rapid traversal along edge passes. This flexibility of OPTPATH renders it applicable not only to conventional operations such as face and pocket milling, but also to other processes such as robotic deburring, rapid prototyping, and robotic spray painting. The effective tool path lengths provided by OPTPATH are compared with those given by the following two algorithms: (i) a common industrial heuristic—referred to as the IH algorithm—and (ii) an algorithm proposed by Prabhu et al. (Prabhu, P. V., Gramopadhye, A. K., and Wang, H. P., 1990, Int. J. Prod. Res., 28, No. 1, pp. 101–130) referred to as PGW algorithm. This comparison is conducted using 100 randomly generated convex polygons of different shapes and a set of seven different tool diameters. It is found that OPTPATH performs better than both the IH as well as PGW algorithms. The superiority of OPTPATH over the two algorithms becomes more pronounced for large tool diameters. [S1087-1357(00)71501-2]

Optimization of Multi-Pass Pocket Milling Parameter Using Ant Colony Optimization

2014 ◽  
Vol 1043 ◽  
pp. 65-70
Author(s):  
Mohd Fadzil Faisae Ab Rashid ◽  
W.S.W. Harun ◽  
S.A.C. Ghani ◽  
N.M.Z. Nik Mohamed ◽  
A.N. Mohd Rose
Keyword(s):  
Ant Colony Optimization ◽  
Process Improvement ◽  
Material Removal ◽  
Cutting Tool ◽  
Ant Colony ◽  
Depth Of Cut ◽  
Machining Time ◽  
Pocket Milling ◽  
Independent Variables ◽  
New Material

In material removal process, milling is one of the oldest processes that were introduced to remove unwanted material using rotated cutting tool. Although a lot of research to improve the process has been done, the process improvement is not stopping there because of evolving new material, method and technology. This paper presents a study to optimize multi-pass pocket milling parameter using Ant Colony Optimization (ACO). Two objectives were set in this work; obtaining optimum surface roughness value (Ra), and minimize machining time (Tm), while the independent variables were spindle speed, feedrate and depth of cut. The numerical experiment confirm that the ACO is having better performance compare with other algorithms (including Genetic Algorithm) for this particular problem. Moreover, result from ACO algorithm able to meet required machining specification.

Image Morphology-Based Path Generation for High-Speed Pocketing

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Bingfei Xiang ◽  
Yingguang Li ◽  
Ke Xu ◽  
Mengyuan Yang
Keyword(s):  
High Speed ◽  
Geometric Constraints ◽  
Aviation Industry ◽  
Path Generation ◽  
Pocket Milling ◽  
Parallel Path ◽  
Mirror Milling ◽  
Local Modification ◽  
Initial Path ◽  
Image Morphology

Abstract Pocket milling has long been a popular means for machining pocket features in structural parts and skins in the aviation industry. Recent advanced milling technologies pose new challenges for pocket milling path which existing contour-parallel path generation schemes cannot overcome. For high-speed machining, pocket milling path is desired to be smooth and with no tool retractions during the process, while the path stepover should be kept within a prescribed range to achieve relatively constant cutting load. These geometric constraints are also vital in the application of aircraft skin mirror milling in order to guarantee a correct and consistent thickness signal reception for real-time adjustment of the process. Traditional path optimization based on local modification can only meet a few of these constraints while others are being violated. Therefore, we propose a novel contour-parallel path generation scheme that respects all these process constraints by utilizing the idea of image morphology. The two-step scheme first generates an initial path by propagating from the rectified medial curve of the pocket shape. The initial path is then treated as a binary image being iteratively deformed and projected back into the pocket region via quadratic optimization. Experimental results show that our developed scheme can generate a smooth, tool retraction free and stepover-guaranteed path for various shapes of pocket.

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