Adaptive spiral tool path generation for computer numerical control machining using point cloud

2021 ◽  
pp. 095440622199007
Author(s):  
Mandeep Dhanda ◽  
Aman Kukreja ◽  
SS Pande
Keyword(s):  
Tool Path ◽  
Cnc Machining ◽  
Numerical Control ◽  
Numerical Control Machining ◽  
Form Errors ◽  
Spiral Tool Path ◽  
Novel Method ◽  
Mesh Grid ◽  
Cloud Of Points ◽  
Cam Software

This paper reports a novel method to generate adaptive spiral tool path for the CNC machining of complex sculptured surface represented in the form of cloud of points without the need for surface fitting. The algorithm initially uses uniform 2 D circular mesh-grid to compute the cutter location (CL) points by applying the tool inverse offset method (IOM). These CL points are refined adaptively till the surface form errors converge below the prescribed tolerance limits in both circumferential and radial directions. They are further refined to eliminate the redundancy in machining and generate optimum region wise tool path to minimize the tool lifts. The NC part programs generated by our algorithm were widely tested for different case studies using the commercial CNC simulator as well as by the actual machining trial. Finally, a comparative study was done between our developed system and the commercial CAM software. The results showed that our system is more efficient and robust in terms of the obtained surface quality, productivity, and memory requirement.

Spiral Tool Path Generation for CNC Machining Using Cloud of Points

2020 ◽  
Author(s):  
Mandeep Dhanda ◽  
Aman Kukreja ◽  
S. S. Pande
Keyword(s):  
Tool Path ◽  
Cnc Machining ◽  
Form Errors ◽  
Part Quality ◽  
Tool Paths ◽  
Spiral Tool Path ◽  
Adaptive Grid Refinement ◽  
Mesh Grid ◽  
Cloud Of Points ◽  
Cam Software

Abstract This paper presents a new method to generate an adaptive spiral tool path for 3-axis CNC machining of the complex freeform surface directly from its representation in the form of the point cloud. The algorithm first constructs the uniform 2D circular mesh-grid to compute the Z (CL) points by applying the tool inverse offset method (IOM). Adaptive grid refinement is carried out iteratively until the surface form errors converge below the prescribed tolerance limits in both circumferential (forward) and radial (step) directions. Adaptive CL points are further refined to minimize the no. of tool lifts and generate an optimum sequence of machining regions. The optimized CL points are post-processed to generate the final CNC part programs in the ISO format. The part programs generated by our algorithm were extensively tested for various case studies using the commercial CNC simulator. The results were compared with those from the commercial CAM software. Our system was found to generate more efficient tool paths in terms of enhanced productivity, part quality, and reduced memory requirement.

Multi-Axis Spiral Tool Path Generation for Aviation Blade Numerical Control Machining

2014 ◽  
Vol 496-500 ◽  
pp. 1535-1538
Author(s):  
Yan Cao ◽  
Zhi Jie Wang ◽  
Yu Bai
Keyword(s):  
Tool Path ◽  
High Efficiency ◽  
Contact Point ◽  
Numerical Control ◽  
Free Form ◽  
Machining Accuracy ◽  
Numerical Control Machining ◽  
Advantages And Disadvantages ◽  
Spiral Tool Path ◽  
Low Efficiency

Aiming at the low machining accuracy, low efficiency, cumbersome programming process, strong empirism and great programming difficulty of special shape blades, a new NC spiral milling method of high-quality and high-efficiency is put forward to process aviation blades. Three methods of constructing spiral tool path are studied, i.e., constructing the spiral using interpolation in parametric domain, constructing the spiral based on a driving surface and projection technology, and segmentally constructing the spiral by plane intersection. By comparison and analysis, their advantages and disadvantages are presented. According to the characteristics of spiral milling, the principles and algorithms of interference-free cutter location calculation for space free-form curved surface are introduced and the focus is put on cutter contact point calculation algorithms.

Development of the PC-based Integrated Interface System of STEP file for CNC Machining Application: Circular Features

2020 ◽  
Vol 12 (7) ◽  
Author(s):  
Muhammad Abdulrahim Rabbani Md Sharizam ◽  
◽  
Saiful Bahri Mohamed ◽  
Tengku Mohd Shahrir Tengku Sulaiman ◽  
Zammeri Abd Rahman ◽  
...  
Keyword(s):  
Tool Path ◽  
Boundary Representation ◽  
Cnc Machining ◽  
Numerical Control ◽  
Setup Cost ◽  
Machining Features ◽  
Interface System ◽  
Computer Aided ◽  
G Code ◽  
Cam Software

STEP is a general data format that observes the international standard ISO 10303-21. STEP means Standard for the Exchange of Product model data. It consists of the 3D geometry of a computer-aided design (CAD) model in the configuration of boundary representation (B-rep). By extracting, refining and decoding the geometric data correctly, the data can be utilized for writing G-code for Computer Numerical Control (CNC) machining application. Usually G-codes can either be manually generated by skilled machinists or automatically generated by computer-aided manufacturing (CAM) software. However, manually generated G-code is inefficient and susceptible to error. Meanwhile automated generation G-code requires significant setup cost. This paper describes the design and development of an integrated interface system, an instrument aimed to be used to analyze STEP files and generate machining tool path based on ISO 6983 format. This developed interface reduces the need for high setup cost as well as eliminates human limitations. The interface at present is able of detecting circular machining features on the workpiece. Circular machining features are created by 3D modelling software and retained as STEP file. The STEP file which contains geometrical data is then uploaded to the interface system as an input file which is structurally analyzed and processed. Finally, the ideal machining tool path in the G Code format is proposed and generated. By bypassing the CAM software and its proprietary post processor, the outcome of this research is important to enhance compatibility between different CNC machine systems

A Method of Generating Spiral Tool Path for Direct Three-Axis Computer Numerical Control Machining of Measured Cloud of Point

2019 ◽  
Vol 19 (4) ◽  
Author(s):  
Jinting Xu ◽  
Longkun Xu ◽  
Yuwen Sun ◽  
Yuan-Shin Lee ◽  
Jibin Zhao
Keyword(s):  
Tool Path ◽  
Computer Numerical Control ◽  
Parametric Models ◽  
Cnc Machining ◽  
Numerical Control ◽  
Archimedean Spiral ◽  
Practical Applications ◽  
Extraction Region ◽  
Tool Paths ◽  
Spiral Tool Path

Smooth continuous spiral tool paths are preferable for computer numerical control (CNC) machining due to their good kinematic and dynamic characteristics. This paper presents a new method to generate spiral tool paths for the direct three-axis CNC machining of the measured cloud of point. In the proposed method, inspired by the Archimedean spiral passing through the radial lines in a circle, 3D radial curves on the cloud of point are introduced, and how to construct the radial curves on the complex cloud of point is discussed in detail and then a practical and effective radial curve construction method of integrating boundary extraction, region triangulation, mesh mapping, and point projection is proposed. On the basis of the radial curves, the spiral tool path can be generated nicely by interpolating the radial curves using a spiral curve. Besides, the method of identifying and eliminating the overcuts and undercuts in the spiral tool path resulting from the interpolation error is also presented for good surface quality. Finally, several examples are given to validate the proposed method and to show its potential in practical applications when quality parametric models and mesh models are not available.

Numerical Control Machining of Scroll with Variable Thickness

2014 ◽  
Vol 490-491 ◽  
pp. 288-293
Author(s):  
Tao Liu ◽  
Xia Qin Wang ◽  
Jun Wu ◽  
Yong Wei Wang
Keyword(s):  
Variable Thickness ◽  
Processing Method ◽  
Numerical Control ◽  
Scroll Compressor ◽  
Numerical Control Machining ◽  
Cad Cam ◽  
Programming Process ◽  
Center Track ◽  
Fitting Error ◽  
Cam Software

With the development of scroll technology, the requirements of more efficient and more accurate processing method for scroll compressor parts become more urgent. This paper proposes a method to improve the machining effect of scroll compressor. The approach is based on 3-point arc approximation method which divides combined profile of scroll wrap into subparagraph arcs that can be interpolated on CNC System. This approach simplifies the programming process and improves the curve fitting effect. The results indicate that the fitting error is in the predetermined range, and the interpolation points of cutter center track are significantly less than those based on CAD/CAM software. The method presented in this paper is of significance to the NC machining of novel precise scroll profile.

Synchronous Adjustment of Milling Tool Path Based on the Relative Deviation

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Xiao-Jin Wan ◽  
Cai-Hua Xiong ◽  
Lin Hua
Keyword(s):  
Tool Path ◽  
Cutting Tool ◽  
Cnc Machining ◽  
Numerical Control ◽  
Machining Process ◽  
Machining Accuracy ◽  
Source File ◽  
Modern Computer ◽  
Adjustment Strategy ◽  
Machining System

In machining process, machining accuracy of part mainly depends on the position and orientation of the cutting tool with respect to the workpiece which is influenced by errors of machine tools and cutter-workpiece-fixture system. A systematic modeling method is presented to integrate the two types of error sources into the deviation of the cutting tool relative to the workpiece which determines the accuracy of the machining system. For the purpose of minimizing the machining error, an adjustment strategy of tool path is proposed on the basis of the generation principle of the cutter location source file (CLSF) in modern computer aided manufacturing (CAM) system by means of the prediction deviation, namely, the deviation of the cutting tool relative to the workpiece in computer numerical control (CNC) machining operation. The resulting errors are introduced as adjustment values to adjust the nominal tool path points from cutter location source file from commercial CAM system prior to machining. Finally, this paper demonstrates the effectiveness of the prediction model and the adjustment technique by two study cases.

New Approaches in Tool Path Optimization of CNC Machining: A Review

2014 ◽  
Vol 663 ◽  
pp. 657-661 ◽  
Author(s):  
Khashayar Danesh Narooei ◽  
Rizauddin Ramli
Keyword(s):  
Tool Path ◽  
Research Direction ◽  
Cnc Machining ◽  
Numerical Control ◽  
Path Optimization ◽  
Machining Process ◽  
Future Research ◽  
Automotive Manufacturing ◽  
Tool Path Optimization ◽  
Automotive Part

Computer numerical control (CNC) machines have been widely used in automotive manufacturing industries especially of machining operation in automotive part such as engine body and cylinder. One of the key features that improve efficiency of CNC machining is through the optimization of tool path. Previous researcher to optimize tool path has premeditated several approaches. This paper aims to provide a critical review of those approaches that have been developed in tool path. The developed tool path approaches covered different types of machining process under various constraints condition. This paper focuses on tool path generation in CNC machining such as milling and cutting process. Based on our finding, this review paper collects information on tool path optimization and recommends future research direction.

Research and Development of Woodworking Curved Jaw CAM

2011 ◽  
Vol 314-316 ◽  
pp. 1542-1545
Author(s):  
Li Juan Chen ◽  
Xiang Jun Zou ◽  
Bing Bing Chen ◽  
Jing Li
Keyword(s):  
Numerical Control ◽  
Secondary Development ◽  
Basic Principles ◽  
Numerical Control Machining ◽  
Graphic Information ◽  
Information Input ◽  
Manufacturing Software ◽  
Cam Software ◽  
Level Of Processing ◽  
Automatic Level

CAM (Computer Aided Manufacturing) software, one of important aid means of numerical control machining, improves the automatic level of processing with its application in numerical control machining industry. According to the character of woodworking curved jaw (WCJ), limitations of secondary development with existing CAM software were analyzed, and the advantages and basic principles of CAM which was independent development were introduced. In this CAM, dxf files as graphic information input for WCJ. Finally, CAM for WCJ was developed with VC++ and OpenGL.

Research on Technologies of Augmented Reality for CNC Machining Process Simulation

2013 ◽  
Vol 579-580 ◽  
pp. 276-282 ◽  
Author(s):  
Zhi Yan Ma ◽  
Guang You Yang ◽  
Xu Wu Su
Keyword(s):  
Process Simulation ◽  
Physical Simulation ◽  
Removal Rate ◽  
Cnc Machining ◽  
Numerical Control ◽  
Machining Process ◽  
Numerical Control Machining ◽  
Machining Process Simulation ◽  
Machining System ◽  
Real Machine

Based on Virtual Numerical Control machining system (VNC), a new method of Augmented Numerical Control machining system (ANC) which aims at the realization of NC machining process simulation in real machining environment is put forward. The System inputs continuous video images of real NC processing environment through camera to identify and locate the major machining and positioning parts of real machine in the image stream. And the virtual parts of VNC will be matched to the corresponding real ones of real machining system to achieve the registration of ANC. The NC system drives the virtual machining models for processing through a real machine. On the other hand, the actual running information of CNC machine are imported into the ANC system to drive some models of process variables such as cutting force, material removal rate, chip shape, tool temperature, cutting tool wear. ANC provides the platform to integrate the geometry and physical simulation based on actual information from real CNC machining environment.

Sign in / Sign up

Export Citation Format

Share Document