There are many NC machines and CNC machines that have old controllers which can not link computers with integrated CAD/CAM system. Therefore, it may not able to apply CAD/CAM/CNC technology in such systems. This article presents a model and research results for integrating CAD/CAM system with CNC machines using a Fanuc controller and for deploying CAD/CAM/CNC technology applications in training and technology transfer at Thai Nguyen University of Technology.
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INTEGRATED MACHINE CENTER VMC-85S WITH THE CAD/CAM SYSTEM - APPLICATION
OF CAD/CAM/CNC IN TRAINING AND TECHNOLOGY TRANSFER AT THAI NGUYEN
UNIVERSITY OF TECHNOLOGY
Duong Xuan Truong * , Tran Minh Duc, Do The Vinh,
Hoang Minh Phuc, Vu Hong Khiem
Thai Nguyen University of Technology
ABSTRACT
Currently, most of the equipments that have been invested in mechanical engineering in Viet Nam are not synchronized There are many NC machines and CNC machines that have old controllers which can not link computers with integrated CAD/CAM system Therefore, it may not able to apply CAD/CAM/CNC technology in such systems This article presents a model and research results for integrating CAD/CAM system with CNC machines using a Fanuc controller and for deploying CAD/CAM/CNC technology applications in training and technology transfer at Thai Nguyen University of Technology
Keywords: CAD/CAM/CNC, Integrated the CAD/CAM system with CNC machines,
Fanuc control Parameter setting RS232, Applications CAD/CAM in training and technology transfer
*
1 INTRODUCTION
Currently, CAD/CAM technology applications
are becoming common in manufacturing and
process engineering in Vietnam For training
and transfering this technology, Thai Nguyen
University of Technology has invested in
equipments such as: CAD/CAM design
laboratory, machine center VMC-85S,
Coordinates Measure Machines (CMM) -
C544, Rapid prototyping machine - 3DP,
Computer Integrated Manufacturing -
OpenCIM However, the machine center
VMC-85S is not able to be connected with the
CAD/CAM system, because the machine
does not have a DNC function and signal
transmission cable As well, no transmission
software is installed in the parameter
functions of the machine
To widen the ability of the VMC-85S in
machining 3D surface, to improve the training
process and the transfer of technology at Thai
Nguyen University of Technology, the
VMC-85S machine should be connected with the
CAD/CAM system
2 MODELING THE RESEARCH PROCESS
* Duong Xuan Truong, Tel: 0982547395,
Email: xuantruong@tnut.edu.vn
2.1 Methods to connect CNC machine
In order to connect the CNC machine, the NC code can be delivered from one or more computers The process will then compile the content of the files into the NC code; this code provides commands for the operation of the convention in order to determine the orbital Popular controllers are Fanuc, Heidenhain, Siemens, Fagor, Anilam and Hass Each controller is the format of parameters and method of connecting individual through the software connection [1, 2, 6]
Controlers Software Connection
CIMCO
Heidenhain TNCremoNT Siemens WinPCin
2.2 Model of integrated CAD/CAM/CNC
Based on some investigated [2, 6, 7], a model LAN-DNC network to integrating CAD/CAM system with the CNC machines was constructed by the authors, and is shown in Figure 1 This was done in order to connect the CNC machine with the computer or to
Trang 2integrate multiple computers with CNC
machines to manage design and tasks
operation from the CAD/CAM system
Figure 1 Model of integrated CAD/CAM/CNC
This model was designed and implemented
with DNC softwares and databases used to
manage drawings and files in the G-code and
DNC server to connect and receive data from
the computer server to the CNC machines
The data is received from the CAD/CAM
room, or directly on the server PC, through
LAN or Internet connection
3 DESCRIPTION OF EXPERIMENTS
3.1 signal transmission cable RS-232
According to the standard RS232,
characteristic transfers of Fanuc controller [1]
and based on research [4, 5, 6, 7] a protocol
is shown in Figure 2 It the functions used for
each cable of the connection as described in
Table 1 was designed
Figure 2 Signal transmission cable RS-232
Table 1 The functions of the RS232
communication cable
DB9 - DB25 conversion
1 8 Data carrier detect
2 3 Receive data
3 2 Transmit data
4 20 Data termi nal ready
5 7 Signal ground
6 6 Data set ready
7 4 Request to send
8 5 Clear to send
9 22 Ring indicator
3.2 Install the parameter connection
Each Series of the Fanuc controller has different parameters for connecting a computer with CNC machines In order to install, the parameters must be edited to the appropriate standard connection Based on Fanuc controller [1] we installed with the connection parameters for each Series as follows:
- Fanuc - 3 Series
- Fanuc 0M Series
- Fanuc 0i-M/0i-T Series
- Fanuc 6 and 9 Series
Trang 3- Fanuc 10 / 11 / 12 / 15
- Fanuc 16 / 18 / 21 (M, T, I Series)
3.3 Results integrated machin e VMC-85S
After designing and installating the LAN
network and integrated the CAD/CAM system
with the machine center VMC-85S; DNC
Server software was installed into the server
PC This server is located in a seperate room
and is connected and integrated into the
network as shown in Figure 3, 6
Figure 3 Connection with DNC Server
software
3.4 Examples of products
The results have been applied to
manufacture mold die castings, as shown in
Figure 4 The products made by the mold die
are shown in Figure 5
Figure 4 Machining mold die casting
Figure 5 Applications product
Figure 6 The integrated system
CAD/CAM/CNC
4 DEPLOYING APPLICATION OF CAD/CAM/CNC IN TRAINING AND TECHNOLOGY TRANSFERING
4.1 Application s in post graduate training
Results of this research project have been used in some Master's thesis of students at Thai Nguyen University of technology as shown below For example: 1 Thesis:
"Research assessing the accuracy Reverse engineering using the machine center VMC-85S"
In this study, the authors have used reverse engineering technology for modeling products such as the motorcycle part as shown in Figure 7 Using Coordinates Measure Machine (CMM) or Laser Scanners to scan pictures, the data cloud points are obtained After that, CAD/CAM/CAE software may be used to redesign the surface of the product
Trang 4Figure 7 Reverse engineering product
Figure 8 Machining on VMC-85S
Process design CAD/CAM and manufacturing of
products have been done by this study using
VMC-85S anh CAD/CAM system
2.Thesis: "Research Advanced accuracy
when machining Geometries and shaped
complex on 3 axis CNC machines by
compensation method wrong number"
In this study, the authors have applied the
CAD/CAM/CNC technology on VMC-85S to
compensate for errors in the software as
shown in Figure 9
Figure 9 Setting up the compensation
parameters
Figure 10 Applications product of offset error
This project has been completed and presented in Master's thesis, and has received high score at Thai Nguyen University
of Technology
4.2 Applications in training and technology transfering
Research results of this study are being implemented in training at Thai Nguyen University of Technology Particularly in the subjects of:
1 CNC and CAD/CAM system
2 Machines technology manufacturing
3 Machine tools
4 Manufacturing Automation
5 Advanced manufacturing
The results of this study can play an important role and are a basis to improve training and technology transfer at Thai Nguyen University
of Technology The program for technology transfer using CAD/CAM/CNC is being proposed as shown in Table 2
Table 2 The technology transfer
AD/CAM/CNC
N
o
Training Program Software
Equipment practice
Design Autocad
CAD/CAM Room
2 Mechanic
al Design
Catia/Top solid
CAD/CAM Room Solidwork
s
3DPrinter-Z510
3 CAD/CA
M Design
Masterca
m
CAD/CAM Room
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Topslid CNC
machines
4
CAD/CA
M/CNC
Technolo
gy
Masterca m/
Catia/Top solid
CAD/CAM Room CNC machines CNC machines
5 CONCLUSIONS
Results of the research integrated CAD/CAM
with the VMC-85S machines have widened
the ability of technology in machining the
surface of 3D objects, research applications
of Technology CAD/CAM in the VMC-85S
and deploying applications effectively in
training and technology transfer of
CAD/CAM/CNC at Thai Nguyen University of
Technology This is scientific basis for
integrating other machines with the CAD/CAM
systems, Especially in the trend of integrating a
variety of CNC machines, as well as creating
industrial network DNC-LAN, use to manage
design (PDM) and business management
(ERP)
REFERENCE [1] Operation's manual for Machining Center
Fanuc
[2] Advanced Modelling for CAD/CAM
System; Heidelberg 2001
[3] Mikell P Groover, Automation,
Production Systems, and Computer
Integrated Manufacturing, Prentice-Hall,
1987
[4] Computer Integrated Manufacturing;
OpenCIM Intelitek – 2004
[5] Integrated CAD/CAM/ERP; Topsolid,
Misler 2008
[6] C.B Beesaut “ Computer Aided Design
And Manufacture; New york, Toronto
Singgapore
[7] Integration of CAD/CAM/PDM/MES and
ERP Systems; K.S Kul’ga and R R Gil’fanov
- ISSN 1068-798X, Russian Engineering
Research, 2008
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*
TÓM TẮT
NGHIÊN CỨU TÍCH HỢP TRUNG TÂM GIA CÔNG VMC-85S VỚI PHÒNG CAD/CAM - TRIỂN KHAI
ỨNG DỤNG CÔNG NGHỆ CAD/CAM/CNC TRONG ĐÀO TẠO VÀ CHUYỂN GIAO CÔNG NGHỆ TẠI TRƯỜNG ĐẠI HỌC KỸ THUẬT CÔNG NGHIỆP
Hoàng Minh Phúc, Vũ Hồng Khiêm
Trường Đại học Kỹ thuật công nghiệp - Đại học Thái Nguyên
Hiện nay, phần lớn các thiết bị đã được đầu tư cho ngành cơ khí ở Việt Nam thường không đồng
bộ, có rất nhiều máy gia công NC và các máy CNC có hệ điều khiển cũ nên không có chức năng kết nối máy tính và tích hợp CAD/CAM Do đó, không thể ứng dụng được công nghệ CAD/CAM/CNC trên các máy gia công này Bài báo này trình bày mô hình và kết quả nghiên cứu tích hợp phòng thiết kế với các trung tâm gia công CNC hệ điều khiển Fanuc và triển khai ứng dụng công nghệ CAD/CAM/CNC trong đào tạo và chuyển giao công nghệ tại trường Đại học Kỹ thuật công nghiệp
Từ khoá: CAD/CAM/CNC tích hợp hệ thống CAD/CAM với các máy CNC, Tham số kết nối RS232 hệ
điều khiển Fanuc, ứng dụng CAD/CAM trong đào tạo và chuyển giao công nghệ
* Duong Xuan Truong, Tel: 0982547395, Email: xuantruong@tnut.edu.vn