Research on NC Technology for High Speed Milling

2010 ◽  
Vol 44-47 ◽  
pp. 280-283
Author(s):  
Zhen Yu Zhao ◽  
Li Xin Huang ◽  
Yong Shan Xiao ◽  
Bai Liu
Keyword(s):  
High Speed ◽  
Manufacturing Industry ◽  
Numerical Control ◽  
Post Processing ◽  
High Speed Milling ◽  
Machining Center ◽  
Look Ahead ◽  
Motion Control Card ◽  
Improved Methods ◽  
Control Post

In the manufacturing industry, high speed milling plays a very important role. The paper introduced a number of essential core component of the key technologies in high speed machining center such as powerful computer numerical control systems, motion control card, post –processing method, processed trajectory control technology (Look Ahead) and high speed processing of programming. The speed control, post processing and look-ahead control are focused on considering, and the corresponding improved methods are brought forward.

Research on the Post-Processing Algorithm about Five-Axis High-Speed Machine Center

2011 ◽  
Vol 141 ◽  
pp. 460-464
Author(s):  
Wei Zhao ◽  
Tedros Alem Hadush ◽  
Qiong Yi He
Keyword(s):  
Control System ◽  
High Speed ◽  
Numerical Control ◽  
Processing Algorithm ◽  
Numerical Control System ◽  
Post Processing ◽  
Machine Center ◽  
Machining Center ◽  
Five Axis ◽  
High Speed Machine

Research on the post-processing algorithm with the DMC75VLinear 5-axis machining center and Heidenhain iTNC530 numerical control system. The formulae about angles B and C are proposed combined with the instruction of M128.The NC codes gotten from this method had been proved in the DMC75VLinea machine, so the post-processing algorithm is tested correctly and reliably.

Experimental Study on High-Speed Milling Performance of 316 Stainless Steel

2010 ◽  
Vol 33 ◽  
pp. 408-412 ◽  
Author(s):  
Can Liu ◽  
J.Q. Wu ◽  
W.F. Zheng ◽  
G.H. Li ◽  
Guang Yu Tan
Keyword(s):  
Stainless Steel ◽  
High Speed ◽  
Depth Of Cut ◽  
Horizontal Force ◽  
High Speed Milling ◽  
316 Stainless Steel ◽  
Machining Center ◽  
Milling Performance ◽  
Small Depth ◽  
Force Signal

In order to obtain the variational regularity of force in high-speed milling 316 stainless steel with carbide tools, an orthogonal milling test was done in machining center, and force signal was processed and analysed using Matlab software. Spectrum analysis showed the energy of horizontal force in high-speed milling transfered to the harmonic frequency, variance analysis showed that both of the axial depth of cut and the feed significantly affected the absolute mean of horizontal force, while the effect of speed was insignificant, indicating it be best to adopt milling parameters as small depth of cut, small feed and high speed. The results of this study can be used to guide high-speed milling of 316 stainless steel.

VERNE - a five-axis parallel kinematics milling machine

2005 ◽  
Vol 219 (3) ◽  
pp. 327-336 ◽  
Author(s):  
M Terrier ◽  
M Giménez ◽  
J-Y Hascoët
Keyword(s):  
High Speed ◽  
Experimental Approach ◽  
Coordinate Measuring Machine ◽  
Direct Consequence ◽  
Numerical Control ◽  
Parallel Kinematics ◽  
High Speed Milling ◽  
Axis Parallel ◽  
Measuring Machine ◽  
Five Axis

Ten years ago a new kind of machine tool was presented in Chicago, based on parallel kinematics architectures. Since then, many of these parallel kinematics machines (PKMs) have been developed around the world. Their main interest lies in their high dynamic characteristics, which could help in going faster in high-speed milling. In order to develop high-speed milling on PKM tools and to highlight their potentialities, the French laboratory IRCCyN is now equipped with the VERNE. This PKM tool has been developed by the Spanish company Fatronik. However, the high-speed milling production process is a complex task, in which a great number of parameters influence the final precision of the part and the productivity of the machine. For example, the NC (numerical control) and computer-aided manufacturing (CAM) parameters (feed forward, milling strategies, etc.), the piece geometry, the machine structure, the tool, etc., have a direct consequence on the final part. Hence, a method has been developed in order to check the capability of the machine (either serial or parallel) in milling, which relies on two approaches. The first one is an experimental approach (either using a coordinate measuring machine or acquiring the output axis encoders), while the second one is a simulated approach. After introducing the kinematics of the VERNE, the experimental approach performed so far will be presented.

Research and Development of Open Numerical Control System

2010 ◽  
Vol 20-23 ◽  
pp. 254-258 ◽  
Author(s):  
Yu Hai Peng ◽  
Hai Qing Bai ◽  
Ning He
Keyword(s):  
Control System ◽  
Manufacturing Industry ◽  
Numerical Control ◽  
Numerical Control System ◽  
Control Machine Tool ◽  
System A ◽  
Motion Control Card ◽  
Open Numerical Control System ◽  
Push Forward ◽  
And Performance

The CNC technology, which directly decides the function and performance of the manufacturing equipments, is the key technique group that supports the modern equipment manufacturing industry. And it is also the key technique for equipment layer which can push forward industrialization with informatization. By the research of open numerical control system, a kind of CNC system has been constructed based on IPC and PMAC motion control card using the designing method of modularization. By test and research, it has been proven that the Open Numerical Control system has complete functions and excellent performance, and can meet the request of modern numerical control machine tool for open numerical control system.

An Approach for Continuous Small Line Blocks High Speed Machining of Embedded Systems

2013 ◽  
Vol 842 ◽  
pp. 367-373
Author(s):  
Yao Ting Wang ◽  
Qiu Ju Zhang ◽  
Jin Sai Cheng
Keyword(s):  
Control System ◽  
Embedded Systems ◽  
High Speed ◽  
Processing Time ◽  
Simulation Experiment ◽  
Numerical Control ◽  
High Speed Machining ◽  
New Approach ◽  
Look Ahead ◽  
The Impact

A key issue of the machining for the small line block is to improve the machining feedrate while keeping the machining precision and satisfying the acceleration constraints. In this paper, a new approach for continuous small line blocks high speed machining is proposed to avoid the impact of Computer Numerical Control (CNC) equipments caused by acceleration gust. This approach uses the small line flag to distinguish whether the path is small line block. While the paths are continuous small line blocks, this approach can automatically adjust the number of look-ahead segments, and predigest the velocity calculation method of the connection point. We first define what a path is small line block. Then we analyze the restrictions for velocity linking of adjacent processing paths, and propose the approach for continuous small line blocks machining. Finally we design a simulation experiment on 30 points processing of the spline track. The result of the simulation shows that this algorithm can obviously shorten the processing time and make control system more harmonious in high speed machining.

Research on the Velocity Look-Ahead Algorithm in the NC System

2011 ◽  
Vol 311-313 ◽  
pp. 2379-2384
Author(s):  
Jian Qun Liu ◽  
Dong Xu ◽  
Ji Rong Wu ◽  
Yang Xu ◽  
Xiao Li ◽  
...  
Keyword(s):  
High Speed ◽  
Linear Acceleration ◽  
Numerical Control ◽  
Machining Accuracy ◽  
Feed Speed ◽  
Direct Transfer ◽  
Optimal Velocity ◽  
Nc System ◽  
Look Ahead ◽  
The Look

Aiming at improving the interpolation efficiency without lowering the machining accuracy, the velocity look-ahead algorithm in the numerical control (NC) system is introduced. Firstly, the machining path’s transferring vector angle model is established, and then the conditions of direct transfer for the adjacent paths are also discussed. Secondly, based on the linear acceleration/deceleration control, the velocity look-ahead algorithm is put forward which can find the approximate-optimal velocity adaptively according to the maximum number of the look-ahead blocks and the geometric properties of the machining path. Finally, the acceleration/deceleration control in the consecutive micro-path can be realized, therefore, the high-speed and smooth transfer of feed-speed among machining path blocks can be achieved.

Hardware Development of CNC System Based on OMAPL138 and FPGA

2014 ◽  
Vol 620 ◽  
pp. 575-580 ◽  
Author(s):  
Jia Jian Li ◽  
Jian Qun Liu ◽  
Ping Zhang ◽  
Wei Qiang Gao
Keyword(s):  
High Speed ◽  
High Reliability ◽  
Numerical Control ◽  
Cnc System ◽  
Linux Operation System ◽  
Serial Test ◽  
Look Ahead ◽  
Core Module ◽  
Usb Communication ◽  
Embedded Cnc

In order to realize high speed, high precision, high reliability, miniaturization performance of the CNC (Computer numerical control) system, this paper proposed a hardware platform of embedded CNC system based on OMAPL138 and FPGA. OMAPL138 is a SOC using C6748 DSP kernel and ARM9 kernel dual-core structure, the kernel frequency can achieve up to 375/456 MHz. ARM kernel of the CNC system which runs the Linux operation system is responsible for task management, DSP kernel is in charge of real-time interpolation and look-ahead algorithm, and FPGA module generates pulses to control the movement of the servo motor. Firstly, the overall hardware architecture of the embedded CNC system was designed. Meanwhile the hardware circuit design of CPU core module based on OMAPL138, human-computer interaction module, EMIFA bus interface of the FPGA core module were emphasized in detail, and also the serial port, Ethernet, USB communication interface module were introduced. A serial test experiments have been conducted and the results have shown that this embedded CNC system is powerful and stable.

Crossbeam Analysis and Structure Optimization of Special-Shaped Stone Combined Machining Center

2010 ◽  
Vol 102-104 ◽  
pp. 620-624 ◽  
Author(s):  
Ke Zhang ◽  
Ju Ping Ren ◽  
Hua Guo ◽  
Yu Hou Wu ◽  
Kai Jun Zhao
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Numerical Control ◽  
3D Design ◽  
Maximum Deformation ◽  
Machining Center ◽  
Function Combination ◽  
Solid Works ◽  
Project Optimization ◽  
Design And Manufacture

With the increase of the quantity demanded, stone products with high quality, really artsy and diversification become more and more best-selling. The special-shaped stone machining equipments with numerical control, single machine intelligent, high speed, high efficiency and multi-function combination must be manufactured to produce these stone products. In this paper, 3D design and project optimization for special-shaped stone composite machining center are carried by Solid Works and innovative design. Model analysis of the crossbeam in this machining center is carried by ANSYS and the maximum deformation value in the crossbeam is found. The crossbeam structure is optimized by comparison and analysis. The design and manufacture of special-shaped stone combined machining center is very helpful for development of manufacturing.

Computer Numerical Control Machine Tool and its Development Trend

2013 ◽  
Vol 774-776 ◽  
pp. 1458-1461
Author(s):  
Huan Yun Wang ◽  
Xiu Fen Liu
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Manufacturing Industry ◽  
High Reliability ◽  
Development Trend ◽  
Numerical Control ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Control Machine Tool ◽  
Comprehensive Level

CNC machine tools are the key equipment in the equipment manufacturing industry, which is related to the national economic construction and strategic position, and is an important symbol reflecting the national comprehensive level. This article analyzes the emergency and characteristics of CNC machine tools and its development trend such as high precision, high speed, high reliability, complex, intelligent, flexibility, integration and openness.

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