Spiral Tool Path Planning Using Eccentric Parameters

2014 ◽  
Author(s):  
Baosu Guo ◽  
Qingjin Peng ◽  
Xiaosheng Cheng ◽  
Ning Dai
Keyword(s):  
High Speed ◽  
Tool Path ◽  
Free Form ◽  
Tool Path Planning ◽  
Inverse Mapping ◽  
Machined Surface ◽  
Tool Paths ◽  
Spiral Tool Path ◽  
Free Form Surfaces ◽  
The Relationship

Free-form surfaces can be machined continuously with minimum tool retractions and at the high speed by following a spiral tool path. This paper presents an improved planning method of the spiral tool path using eccentric parameters for machining free-form surfaces. The relationship between a 3D machined surface and the 2D circular region is established through the conformal mapping. In order to generate an even path, eccentric parameters are used in 2D parametric circular regions to optimize the path interval. The proposed method produces planar spiral segments as a diagonal curve between every two adjacent parametric tool paths. A 2D spiral tool path is gained by linking spiral segments in sequence. Inverse mapping of the 2D spiral tool path onto the machined surface generates the 3D spiral tool path. The main processes of the proposed method include reducing dimensions of free-form surfaces, calculating the eccentric parametric tool path, and generating the planar diagonal spiral tool path. Some applications are used to verify the proposed methods. The proposed method allows the start point to be arbitrary and generates more even tool paths than the existing methods by introducing the mapping distortion.

scholarly journals Iso-level tool path planning for free-form surfaces

2014 ◽  
Vol 53 ◽  
pp. 117-125 ◽  
Author(s):  
Qiang Zou ◽  
Juyong Zhang ◽  
Bailin Deng ◽  
Jibin Zhao
Keyword(s):  
Path Planning ◽  
Tool Path ◽  
Free Form ◽  
Tool Path Planning ◽  
Free Form Surfaces

Adaptive Tool Path Planning Strategy for 5-Axis CNC Machining of Free Form Surfaces

2019 ◽  
Author(s):  
Hrishikesh Mane ◽  
S. S. Pande
Keyword(s):  
Tool Path ◽  
Cnc Machining ◽  
Memory Storage ◽  
Free Form ◽  
Cnc Machine ◽  
Planning Strategy ◽  
Part Quality ◽  
Tool Paths ◽  
Path Topology ◽  
Free Form Surfaces

Abstract This paper presents a curvature based adaptive iso-parametric strategy for the efficient machining of free form surfaces on 5-axis CNC machine using the flat end mill tool. One iso-parametric boundary of the surface is selected as the initial tool path. Set of cutter contact (CC) points are chosen adaptively on the initial tool path considering desired profile tolerance. Adjacent iso-parametric tool paths are computed adaptively based on the scallop height constraint unlike the traditional iso-parametric approach. The path topology is post-processed to generate the part program for 5-axis CNC machine in ISO format. The system was rigorously tested for various case studies by comparing the results with the traditional 5-axis iso-parametric tool path strategy, iso-scallop strategy and iso-planar strategy of a commercial software. Our system was found to generate efficient tool paths in terms of part quality, productivity and memory storage compared to the conventional strategies.

Computing Cutter Engagement Values in Milling Tessellated Free-Form Surfaces

2010 ◽  
Vol 10 (4) ◽  
Author(s):  
Zhiyang Yao ◽  
Ajay Joneja
Keyword(s):  
Computational Model ◽  
Cutting Force ◽  
High Speed ◽  
Tool Path ◽  
Free Form ◽  
High Speed Milling ◽  
Free Form Surfaces ◽  
Potential Use ◽  
Do So

High speed milling (HSM) has great potential use in die/mold cutting, but traditional machining plans do exploit HSM capabilities effectively. An important consideration in HSM is to limit cutting force variations, and one way to do so is to reduce cutter-workpiece engagement (CWE) variations. CWE is measured as the area of the tool instantaneously engaged with the part. Estimating CWE as a function of the tool path requires repeated, expensive computations. This paper develops algorithms for a discretized computational model to make CWE computations for arbitrary shaped parts.

Efficient Tool-Path Planning for Machining Free-Form Surfaces

1996 ◽  
Vol 118 (1) ◽  
pp. 20-28 ◽  
Author(s):  
Rong-Shine Lin ◽  
Y. Koren
Keyword(s):  
Path Planning ◽  
Tool Path ◽  
Free Form ◽  
Tool Path Planning ◽  
Efficient Tool ◽  
New Approach ◽  
Milling Machines ◽  
Part Surface ◽  
Tool Path Interval ◽  
Free Form Surfaces

This paper presents an analytical method for planning an efficient tool-path in machining free-form surfaces on 3-axis milling machines. This new approach uses a nonconstant offset of the previous tool-path, which guarantees the cutter moving in an unmachined area of the part surface and without redundant machining. The method comprises three steps: (1) the calculation of the tool-path interval, (2) the conversion from the path interval to the parametric interval, and (3) the synthesis of efficient tool-path planning.

Constant Scallop-height Machining of Free-form Surfaces

1994 ◽  
Vol 116 (2) ◽  
pp. 253-259 ◽  
Author(s):  
K. Suresh ◽  
D. C. H. Yang
Keyword(s):  
Tool Path ◽  
End Milling ◽  
Free Form ◽  
Machining Time ◽  
Scallop Height ◽  
Location Data ◽  
Tool Paths ◽  
Novel Approach ◽  
Constant Scallop Height ◽  
Free Form Surfaces

A novel approach for the NC tool-path generation of free-form surfaces is presented. Traditionally, the distance between adjacent tool-paths in either the Euclidean space or in the parametric space is kept constant. Instead, in this work, the scallop-height is kept constant. This leads to a significant reduction in the size of the CL (cutter location) data accompanied by a reduction in the machining time. This work focuses on the zig-zag (meander) finishing using a ball-end milling cutter.

Generation of Optimal Tool-Paths for Five-Axis Finish Milling of Free-Form Surfaces

2012 ◽  
Vol 500 ◽  
pp. 440-446
Author(s):  
Lin Geng ◽  
Yun Feng Zhang
Keyword(s):  
Genetic Algorithm ◽  
Tool Path ◽  
Free Form ◽  
Machining Efficiency ◽  
Interference Avoidance ◽  
Tool Paths ◽  
Modified Genetic Algorithm ◽  
Novel Method ◽  
Five Axis ◽  
Free Form Surfaces

In this paper, a novel method is proposed to generate optimal 5-axis finish tool-paths regarding joint movements and machining efficiency. A modified genetic algorithm is used to search for the optimal posture sequence along a tool-path while interference avoidance and surface finish quality act as constraints. Case studies are then provided to prove the effectiveness of the algorithm.

Boundary-conformed machining of turbine blades

2005 ◽  
Vol 219 (3) ◽  
pp. 255-263 ◽  
Author(s):  
S Ding ◽  
D C H Yang ◽  
Z Han
Keyword(s):  
Computer Aided Design ◽  
Tool Path ◽  
Flow Line ◽  
Turbine Blades ◽  
Free Form ◽  
Implementation Processes ◽  
Tool Marks ◽  
Tool Paths ◽  
Continuous Boundary ◽  
Free Form Surfaces

Boundary-conformed machining is a new method to mill free-form surfaces with tool paths that reflect the natural shapes of the surfaces. It is suitable for the machining of turbine blades taking into account the direction of tool marks left on the vanes. To facilitate this type of machining, this paper introduces an application of the ‘boundary-conformed algorithm’ to generate continuous boundary-conformed flow line tool paths for the milling of blade surfaces. With this approach, the initial segment of the flow line tool paths is along the top edges of the blade while the final segment follows the intersection curves between the blade and the hub surface. The intermediate segments cover the surface by changing smoothly from the initial tool path to the final tool path. The two opposite sides of the blade, which are two trimmed surfaces, are machined together continuously from top to bottom with these continuous boundary-conformed tool paths. This method has been successfully integrated into an industrial computer-aided design and manufacture system (Pro/Engineer) by using Pro/Toolkit. A detailed algorithm and implementation processes have been introduced.

Study on Path Planning for Industrial Robots in Free-Form Surfaces Polishing

2008 ◽  
Vol 392-394 ◽  
pp. 771-776 ◽  
Author(s):  
Jian Ming Zhan ◽  
Xiao Qin Zhou ◽  
Li Yong Hu
Keyword(s):  
Path Planning ◽  
Tool Path ◽  
Industrial Robots ◽  
Planning Method ◽  
Free Form ◽  
Systematic Research ◽  
Tool Path Planning ◽  
Direction Parallel ◽  
Free Form Surfaces ◽  
Polishing Tool

Expected path of polishing tool is one of the most essential needs for movement scheduling and movement controlling of polishing robot in free-form surfaces polishing. By analyzing the expected movement and position of polishing tool and based on the traditional movement scheduling methods, this paper carries out systematic research works on contour-parallel-machining tool path planning method and direction-parallel-machining tool path planning method for polishing tool paths figuring out. Compared with contour-parallel-machining tool path planning method, the direction-parallel-machining tool path planning method needs one less number of degree of freedom and is much easier to avoid physical interventions and mechanic singularity, so it is an improved one.

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