DESIGN AND MANUFACTURE a TYPICAL BAMBOO TREES GRINDING MACHINE

HỘI NGHỊ KHCN TỒN QUỐC VỀ CƠ KHÍ - ĐỘNG LỰC NĂM 2017 Ngày 14 tháng 10 năm 2017 Trường ĐH Bách Khoa – ĐHQG TP HCM DESIGN AND MANUFACTURE A TYPICAL BAMBOO TREES GRINDING MACHINE Le Khanh Dien1, Tran Van Hung1, Vo Tuyen2, Nguyen Tan Hung2 Nguyen Thanh Nam2, Nguyen Huy Bich3 HCM City University of Technology, VNU-HCM, Vietnam National Key Lab of Digital Control and System Engineering, HCMUT, VNU-HCM, Vietnam HCM City Nong Lam University, Vietnam ABSTRACT: Bamboo tree is a typical flora in Vietnam that considers as a natural fence that could not manufactures a typical grinding machine of bamboo tree that could be suitable to the overcome in almost all villages Bamboo tree provides also the material of building, chopstick, and bamboo art plywood, absorbent of sweat mat… In the technology of manufacture of bamboo art plywood, the grinding of bamboo tree to powder is always the principal instrument in the process of production of bamboo product characteristic of this typical tree in Vietnam The design interests also the provided source of power, the movement of the design machine when it has to work in the bamboo forest very far from electric power We hope that this research will contribute a tiny part in the exploiting an endless material in our country The paper represents a design and Keywords: bamboo powder, exploiting, design, manufacture, bamboo tree grinding machine INTRODUTION Bamboo is very popular in a large area in South East of Asia, especially in Vietnam This evergreen tree is considered as natural fence that is unable to cross Bamboo is also a popular raw material for wattle, canvas, basket, seat, chopsticks, village house frame and even boats… been used as a raw material for production of chopsticks, plywood and so many other products The paper concentrates to describe the process of grinding trivial bamboo and grinding machine Long time ago, the trifling materials of bamboo after used are burned that causes lot of pollution in the recent years they are grinded to powder that is blended with glue to form additive substance for plywood… The bamboo power that is the product of the processes of grinding has The following figures represent briefly the process of the process of grinding trifling bamboo that were performed in CAD-CAM workshop of the 2National Key Lab of Digital Control and System Engineering (DCSELab), University of Technology, VNU-HCMC, Vietnam Trang 302 PROCESS OF GRINDING BAMBOO TO POWDER TRILING HỘI NGHỊ KHCN TOÀN QUỐC VỀ CƠ KHÍ - ĐỘNG LỰC NĂM 2017 Ngày 14 tháng 10 năm 2017 Trường ĐH Bách Khoa – ĐHQG TP HCM a Bamboo tree b After harvesting e Bamboo powder c Bamboo residues f Bamboo chopsticks d Bamboo grinding machine g Bamboo HDF green core h MFC plywood Figure Process from bamboo forest to production of bamboo powder DESIGN THE BAMBOO GRINDING MACHINED Bamboo grinding machine is focused in the paper There are many alternate design of bamboo grinding machine, in this paper we selected the schema of shafts cutter as in the Figure Figure Schema of the designed grinding bamboo machine The initial demanded parameters  Small type: 40x60x100 Principal primitive material: trivial bamboo branches  Productivity: 100 – 120 kg/h  Dimensions of chips before grinding: Small type: 20x30x50  Dimensions of chips after grinded: 0.2x2x20  Bamboo mass: 800 kg/m3  Moisture: 12 -14 % Trang 303 HỘI NGHỊ KHCN TOÀN QUỐC VỀ CƠ KHÍ - ĐỘNG LỰC NĂM 2017 Ngày 14 tháng 10 năm 2017 Trường ĐH Bách Khoa – ĐHQG TP HCM 3.1 KINEMATICS DEDIGN The selected material of cutter edge is The schema of transmission of the design Carbon steel tool, according to [4] the selected grinding machine is illustrated in Figure cutting velocity is V=70 m/min~1.2 m/s, with 3.2 DYNAMICS DESIGN AND TOOL CUTTER selected diameter of tool is =200 =0.2 m =   Revolution per minute of cutter shaft is n=114.59 RPM, Selected n=115 RPM, There are 18 rotating carbon tool steel disc which are alternately mounted on shafts and these cutters are alternately engaged with fixed cutter that is mount on the frame as in the following figure (Figure 3) Figure a dismantled high carbon steel discs cutter The following figures (Figure 4) illustrate the assembly drawing of the grinding housing and b 18 discs cutter are mounted on shafts cutters shafts and Figure displays the outside of manufactured bamboo grinding machine Figure Design drawing of the grinding housing and cutters shafts of the machine Trang 304 HỘI NGHỊ KHCN TỒN QUỐC VỀ CƠ KHÍ - ĐỘNG LỰC NĂM 2017 Ngày 14 tháng 10 năm 2017 Trường ĐH Bách Khoa – ĐHQG TP HCM Figure Outside structure of designed and manufactured bamboo grinding machine, the belt conveyor is used to transport bamboo powder in the bottom tank under the grinding machine to a suitable altitude The following table displays the technical parameters of the bamboo grinding machine Power (kW) Revolution per minute (RPM) Torque (Nm) 2956 13.4035 Primary shaft of gearbox 3.48 985 40.2105 Cutter shaft 3.132 115 344.411 Electric motor APPLICATION The designed and manufactured bamboo grinding machine was an opinion and recommendation of the director boards of Bamboo Village Phu An, Binh Duong province to the DCSElab After designed and manufacture session with our own experiments, the achieved machine that was delivered last year is working in normal maintenance with the demanded productivity CONCLUSION The manufactured machine in the service for agriculture, art handicraft and small industry products firmly proves the essential position and valuation of the domestic manufacture in saving finance for imported machine Nowadays, confronted to the competition of Chinese bamboo grinding machines, we think that our designed and manufactured domestic bamboo machine could overcome the Chinese machine because some of the following reasons: - The logical design and the quality of materials and manufactured process will enhance the quality of domestic machine - Price of domestic machines could be excluded of import tax and decreased the transportation spending Acknowledgement This research is supported by DCSELAB and funded by Vietnam National University Ho Chi Minh City (VNU-HCM) under grant number GEN 2016.48.02.06 Trang 305 HỘI NGHỊ KHCN TOÀN QUỐC VỀ CƠ KHÍ - ĐỘNG LỰC NĂM 2017 Ngày 14 tháng 10 năm 2017 Trường ĐH Bách Khoa – ĐHQG TP HCM REFERENCES [1] Machining operations and machine tools an introduction of Technology, 2009 [4] A Course book for Polish and Foreign Students 2010 [2] Antonio F Baldo, Heard K Baumeister, “Machine Elements”, Xerox Corp, 2012 [5] Circular saw blades, 2007 [3] Andrzej Golenko, “Fundamentals of Machine Design” A Course book for Polish and Foreign Students, Wroclaw University of Technology, 2010 [6] Equipment and tools for wood industry, MD Metal Draft S.R.O, 2012 [7] Grinding machine catalog, Sandalwood 2013 THIẾT KẾ VÀ CHẾ TẠO MÁY NGHIỀN BỘT TRE TÓM TẮT: Tre loại thực vật đặc trưng Việt thiệu quy trình thiết kế chế tạo máy Nam, từ xưa xem loại rào cản nghiền tre đặc trưng phù hợp với đặc tính thiên nhiên khơng thể vượt qua làng loại thực vật Việt Nam Giai đoạn thiết kế mạc thôn quê Việt Nam Thân tre quan tâm đến việc chọn nguồn động lực cho xem nguyên vật liệu dùng để xây dựng, để máy phải hoạt động rừng tre sản xuất đũa, ván ép mỹ thuật tre, chiếu xa nguồn điện Chúng hy vọng hút mồ hôi,… Trong công nghệ chế tạo ván ép nghiên cứu đóng góp phần mỹ thuật tre, máy nghiền bột tre nhỏ việc khai thác nguyên liệu bất thiết bị quan trọng quy trình sản xuất sản tận đất nước phẩm tre cao cấp Bài nghiên cứu giới Từ khóa: bột tre, khai thác, thiết kế, chế tạo, máy nghiền bột tre Trang 306 ... APPLICATION The designed and manufactured bamboo grinding machine was an opinion and recommendation of the director boards of Bamboo Village Phu An, Binh Duong province to the DCSElab After designed... production of bamboo powder DESIGN THE BAMBOO GRINDING MACHINED Bamboo grinding machine is focused in the paper There are many alternate design of bamboo grinding machine, in this paper we selected... of designed and manufactured bamboo grinding machine, the belt conveyor is used to transport bamboo powder in the bottom tank under the grinding machine to a suitable altitude The following table