Free-Form Surface Five-Axis Machining Tool Path and Tool Posture Simultaneous Multi-Objective Optimization Theory Research

2011 ◽  
Vol 467-469 ◽  
pp. 900-905
Author(s):  
Shu Kun Cao ◽  
Li Song ◽  
Kai Feng Song ◽  
Jie Lv ◽  
Xiu Sheng Chen
Keyword(s):  
Tool Path ◽  
Contact Point ◽  
Free Form ◽  
Multi Objective Optimization ◽  
Scallop Height ◽  
Multi Objective ◽  
Tool Axis ◽  
Tool Posture ◽  
Free Form Surface ◽  
Five Axis

In view of all sorts of questions existing in CNC machining, such as machining vibration, so proposed a new simultaneous multi-objective optimization algorithm on free-form surface five-axis machining tool path and tool posture based on constant scallop height. In the algorithm, we first complete the surface fitting on the base of feature points obtained. Secondly calculate principal curvatures of the surface, select tools, and at the same time generate tool axis vector in the current cutter-contact point tool axis. Once again get the maximum spacing and surface curvature in accordance with the tool effective cutting radius, discrete into cutter-contact point, and calculate the cutting depth to adjust the machine feed rate. And finally connect adjacent curve path using the diagonal to achieve a continuous cutting scallop height tool path. This algorithm can achieve the goals such as the same precision, improving processing efficiency, reducing the number of tool cutting in and out, reducing cutting vibration and tool wear and so on. That is the algorithm can achieve simultaneous multi-objective optimization of the free-form surface NC machining finally.

Tool Path Generation for Five-Axis Controlled Machining of Free-Form Surface Using Barrel Tool: Control of Contact Point on Cutting Edge

2020 ◽  
Author(s):  
Tomonobu Suzuki ◽  
Koichi Morishige
Keyword(s):  
Tool Path ◽  
Contact Point ◽  
Cutting Edge ◽  
Free Form ◽  
End Mill ◽  
Ball End Mill ◽  
Surface Machining ◽  
Free Form Surface ◽  
The Cost ◽  
Five Axis

Abstract This study aimed to improve the efficiency of free-form surface machining by using a five-axis controlled machine tool and a barrel tool. The barrel tool has cutting edges, with curvature smaller than the radius, increasing the pick feed width compared with a conventional ball end mill of the same tool radius. As a result, the machining efficiency can be improved; however, the cost of the barrel tool is high and difficult to reground. In this study, a method to obtain the cutting points that make the cusp height below the target value is proposed. Moreover, a method to improve the tool life by continuously and uniformly changing the contact point on the cutting edge is proposed. The usefulness of the developed method is confirmed through machining simulations.

Software Module Development for Free-Form Surface Five-Axis Machining Path and Tool Posture Simultaneous Optimization

2011 ◽  
Vol 55-57 ◽  
pp. 1932-1937
Author(s):  
Li Song ◽  
Shu Kun Cao ◽  
Kai Feng Song ◽  
Chang Zhong Wu ◽  
Wei Wei Song
Keyword(s):  
Tool Path ◽  
Three Dimensional ◽  
Path Optimization ◽  
Simultaneous Optimization ◽  
Free Form ◽  
Software Module ◽  
Tool Posture ◽  
Free Form Surface ◽  
Five Axis ◽  
Free Form Surfaces

The paper presented the development of free-form surface axis NC machining tool path optimization module. In the UG environment, have three-dimensional solid modeling to the surface, and then have the secondary development of free-form surfaces five-axis machining path optimization module through the UG/Open API and VC++6.0. This can realize NC processing path automatically generation and optimization after the three-dimensional modeling. Introduction

Research on Path Optimization Technology for Free-Form Surface Five-Axis NC Machining

2012 ◽  
Vol 443-444 ◽  
pp. 202-208 ◽  
Author(s):  
Shu Kun Cao ◽  
Li Song ◽  
Ke Dong ◽  
Kai Feng Song ◽  
Zhi Ming Sui
Keyword(s):  
Tool Path ◽  
Simple Calculation ◽  
Nc Machining ◽  
Cnc Machining ◽  
Path Optimization ◽  
Free Form ◽  
Surface Boundary ◽  
Scallop Height ◽  
Free Form Surface ◽  
Five Axis

In view of all sorts of questions existing in CNC machining, such as machining vibration, so proposed a new method of free-form surface NC machining path optimization based on constant scallop height. This method first discrete surface boundary into the knife touch point based on the maximum tolerance, then in accordance with the maximum allowable scallop height generates circular trajectory with the same scallop, and finally connects adjacent curve path using the diagonal to achieve a continuous cutting scallop height tool path. This method can reduce the number of tools cut in and out parts, reduce the processing vibration and tool wear, and the surface processed has the same precision. This method has simple calculation, suitable for free-form surface of CNC highspeed and precision machining.

Development of Embedded Linux CNC System Based on ARM9

2011 ◽  
Vol 467-469 ◽  
pp. 906-911 ◽  
Author(s):  
Shu Kun Cao ◽  
Chang Lei Wang ◽  
Hui Zhang ◽  
Jie Lv ◽  
Chang Zhong Wu
Keyword(s):  
Tool Path ◽  
Free Form ◽  
Cnc System ◽  
Open Cnc ◽  
Standard Interface ◽  
Stepper Motors ◽  
Tool Posture ◽  
Cross Platform ◽  
Five Axis ◽  
The Way

Five-axis machining area of free surface is proposed by based on ARM9 and Linux open CNC system's overall structure of the CNC system hardware and software architecture. The system adopts the mode of the host computer PC, the lower computer ARM9 development board. PC completes the model of space surface and generates tool path by Simultaneous Multi-objective Optimization Algorithm on Free-form Surface Five-Axis Machining Tool Path and Tool Posture. The lower computer applies MYSQL database to storage and manage cutter location point information. Other modules access the database through ODBC standard interface. ARM9and PC utilize the way of cross-platform socket data transmission, the stepper motors is controlled by the way of constant acceleration - deceleration.

Studies on the Algorithm for Five-Axis NC Machining with Triangular Facet Model

2013 ◽  
Vol 385-386 ◽  
pp. 726-730
Author(s):  
Ren Xian Geng ◽  
Hou Jun Qi ◽  
Xin Pan ◽  
Zhi Gang Liu
Keyword(s):  
Tool Path ◽  
Nc Machining ◽  
Surface Shape ◽  
Free Form ◽  
Cutting Efficiency ◽  
Triangular Facet ◽  
Constant Scallop Height ◽  
Free Form Surface ◽  
Five Axis ◽  
Facet Model

Using five-axis equipment for NC machining of free-form surface is an effective way to improve machining quality and machining efficiency, the surface shape and the five coordinate of the complexity of the machine tool movement led to its tool path planning technology is difficult. The paper aimed at the five coordinate NC machining of free-form surface and puts forward a five-axis NC machining method based on triangular facet model. The research based on triangular facet model, using constant scallop height method to calculate the step distance and improve the cutting efficiency to a great extent. In the process, tool path is generated, combining with the method of configuration space interference free.

Machining of Free-Form Surface Base on Cutter Shaft Tilt Method with Ball-End Cutter

2011 ◽  
Vol 215 ◽  
pp. 176-181
Author(s):  
Li Min ◽  
Ke Hua Zhang
Keyword(s):  
Tool Path ◽  
Tool Path Generation ◽  
Free Form ◽  
Real Surface ◽  
End Mill ◽  
Ball End Mill ◽  
Surface Machining ◽  
Processing Accuracy ◽  
Free Form Surface ◽  
Five Axis

A new tool path generation method based on cutter shaft tilt method was proposed for free-form surface machining by using Ball-end Cutter. Firstly, it introduces the processing quality problems caused by traditional ball-end mill processing. Then cutter shaft tilt was proposed to avoid the above questions. Analyzing the different machining efficiency at the different angle, and then cutter shaft tilt compensation method which based on above method could avoid that problem was proposed. After the paths calculation to a real surface and simulation, the result shows that, comparing to traditional machining method, the new method reduced efficiently phenomenon of extruding and scratching surface. It meets five-axis processing accuracy requirements.

Virtual Five-Axis Milling of Free-Form Surface-Part II: Feed Optimization

2010 ◽  
Vol 29-32 ◽  
pp. 430-435
Author(s):  
Li Qiang Zhang ◽  
Ye Cui Yan
Keyword(s):  
Process Optimization ◽  
Sequential Quadratic Programming ◽  
Tool Path ◽  
Milling Process ◽  
Free Form ◽  
Machining Time ◽  
Mechanics Model ◽  
Finished Surface ◽  
Free Form Surface ◽  
Five Axis

This paper presents process optimization for the five-axis milling based on the mechanics model explained in Part I. The process is optimized by varying the feed as the tool-workpiece engagements. The linear and angular feedrates are optimized by sequential quadratic programming. Sharp feedrate changes may result in undesired feed-marks on the finished surface. The adopted step is to update the the original CL file with optimized and filtered feedrate commands. The five-axis milling process is simulated in a virtual enviroment, and the resulting feedrate outputs are stored at each position along the tool path. The new feedrate profiles are shown to considerably reduce the machining time while avoiding process faults.

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