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

Dương Xuân Trường và cs Tạp chí KHOA HỌC & CÔNG NGHỆ 58(10): 37 - 41 Số hóa bởi Trung tâm Học liệu – Đại học Thái Nguyên 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 FANUC DNC, DNC Server, CIMCO... Heidenhain TNCremoNT Siemens WinPCin Fagor Win DNC 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 Dương Xuân Trường và cs Tạp chí KHOA HỌC & CÔNG NGHỆ 58(10): 37 - 41 integrate 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 DB9 DB25 Function 1 8 Data carrier detect 2 3 Receive data 3 2 Transmit data 4 20 Data terminal 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 Dương Xuân Trường và cs Tạp chí KHOA HỌC & CÔNG NGHỆ 58(10): 37 - 41 - 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. Dương Xuân Trường và cs Tạp chí KHOA HỌC & CÔNG NGHỆ 58(10): 37 - 41 Figure 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 1 2D Design Autocad CAD/CAM Room 2 Mechanical Design Catia/Top solid CAD/CAM Room Solidwork s 3DPrinter- Z510 3 CAD/CA M Design Masterca m CAD/CAM Room Dương Xuân Trường và cs Tạp chí KHOA HỌC & CÔNG NGHỆ 58(10): 37 - 41 Số hóa bởi Trung tâm Học liệu – Đại học Thái Nguyên 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. Dương Xuân Trường và cs Tạp chí KHOA HỌC & CÔNG NGHỆ 58(10): 37 - 41 Số hóa bởi Trung tâm Học liệu – Đại học Thái Nguyên * 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 Dương Xuân Trường*, Trần Minh Đức, Đỗ Thế Vinh, 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