An Octree Approach to Rough Machining

1987 ◽  
Vol 201 (3) ◽  
pp. 157-163 ◽  
Author(s):  
M F Yuen ◽  
S T Tan ◽  
W S Sze ◽  
W Y Wong
Keyword(s):  
Three Dimensional ◽  
Numerical Control ◽  
Path Generation ◽  
Layer By Layer ◽  
Rough Machining ◽  
Numerical Control Machining ◽  
Solid Models ◽  
Cutter Path ◽  
Jigs And Fixtures ◽  
Cutter Path Generation

This paper presents an octree subdivision based algorithm of automatic cutter path generation for machining on a numerical control machining centre. Both the stock and the part are represented by solid models. The machining strategy is based on a layer by layer approach taking care of the cutter strength and the variation of the part geometry. This approach allows the problem to be reduced from a three-dimensional to a two-dimensional cutter path generation problem which is solved by a quadtree representation of the plane. The method can be easily extended to include the jigs and fixtures and any other obstacles which would be represented by solid models. Algorithms are described in Pascal-like structure.

Study on Simulation of Virtual Numerical Control Machining Process

2014 ◽  
Vol 701-702 ◽  
pp. 223-226
Author(s):  
Shuang Wu
Keyword(s):  
Three Dimensional ◽  
The Body ◽  
Numerical Control ◽  
Machining Process ◽  
Two Dimensional ◽  
Cnc Milling ◽  
Numerical Control Machining ◽  
Intersection Algorithm ◽  
Dimensional Simulation ◽  
Tool Cutting

This paper is study on the two-dimensional simulation of the machining process, and three-dimensional simulation. Analog three-axis CNC milling machining entity, it will be processed rough triangular facets discrete and discrete vector geometry and tool scans the body to do intersection algorithm to simulate the tool cutting process by continually updating the blank data to achieve material simulation removal process.

Macro Program Design of Variational Trapezoid Curve Disk Cam

2011 ◽  
Vol 338 ◽  
pp. 689-696
Author(s):  
Guan Ming Wang ◽  
Zhi Xue Lu ◽  
Dan Huang
Keyword(s):  
Program Design ◽  
Parametric Design ◽  
Control Program ◽  
Calculation Model ◽  
Numerical Control ◽  
Design Parameters ◽  
Numerical Control Machining ◽  
Holonomic Constraint ◽  
Cutter Path ◽  
Mathematical Calculation

Based on the design parameters of disc CAM with the oscillating roller follower and modified trapezoid curve follower motion, by introducing macro program cyclic variable, the mathematical calculation model of macro program about cutter path of disc CAM with the holonomic constraint oscillating roller follower is established. The macro program is designed to can be adjusted quickly, according to the design parameters and the process parameters. The numerical control program completely parametric design is realized. So it provides programming methods and strategies for numerical control machining macro program design of the oscillating roller follower disc CAM with a complicated movement law.

scholarly journals Three-Axis NC Cutter Path Generation for Subdivision Surface with Z-Map

2005 ◽  
Vol 48 (4) ◽  
pp. 757-762 ◽  
Author(s):  
Peng WU ◽  
Hiromasa SUZUKI ◽  
Kiwamu KASE
Keyword(s):  
Path Generation ◽  
Subdivision Surface ◽  
Cutter Path ◽  
Cutter Path Generation

scholarly journals Automatic cutter path generation based on product features.

1989 ◽  
Vol 55 (7) ◽  
pp. 1217-1222
Author(s):  
Michiko MATSUDA ◽  
Masatomo INUI ◽  
Fumihiko KIMURA
Keyword(s):  
Path Generation ◽  
Product Features ◽  
Cutter Path ◽  
Cutter Path Generation

Optimization of 3D Pocket Machining Using Multiple Tools

2012 ◽  
Vol 503-504 ◽  
pp. 7-10
Author(s):  
Ming Rang Yu ◽  
Ying Jie Zhang ◽  
Ding Zhang
Keyword(s):  
Machine Tools ◽  
Cutting Tools ◽  
Numerical Control ◽  
Layer By Layer ◽  
Machining Time ◽  
Pocket Machining ◽  
Numerical Control Machining ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Scan Line

In numerical control machining, the number and the size of the cutting tools in use have a significant effect on machining efficiency. This paper puts forward a method to select the most appropriate group of cutters for 3D pocket machining using NC machine tools, which aim to minimize the total machining time. Considering the material is removed layer by layer in roughing, three scan-line filling algorithm is proposed to calculate the cutting area of every layer, which is necessary to calculate the machining time. After the total machining time of each group of cutters is calculated, the optimal group of cutters can be determined easily. Both the theoretical analysis and the simulated results show that the proposed algorithm can improve the efficiency of NC machining.

NC Machining Algorithms for CSG Solids

1987 ◽  
Author(s):  
S. T. Tan ◽  
M. F. Yuen ◽  
W. S. Sze ◽  
W. Y. Wong
Keyword(s):  
Numerical Control ◽  
Constructive Solid Geometry ◽  
Solid Modelling ◽  
Rough Machining ◽  
Command Language ◽  
Numerical Control Machining ◽  
Solid Geometry ◽  
Set Up ◽  
Automation Project ◽  
Production Automation

Abstract This paper presents two algorithms for NC (Numerical Control) machining of engineering parts defined as a CSG (Constructive Solid Geometry) (1) model. The algorithms are respectively for automatically roughing out the approximate shape using octree and quadtree encoding techniques and for machining the final shape with fine cuts. In this paper, the two algorithms are referred to as rough machining and fine machining and form the Hong Kong University’s NC module for the PADL-2 solid modelling system developed by the Production Automation Project of Rochester University. The NC module with its own command language is embedded into PADL-2. Parts defined with the PADL-2 system can be machined using this module on a 3-axis machining centre via a hardwired link. Examples of the parts machined with this set-up are also illustrated in this paper.

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