Takatoki Yamamoto, Mami Hino, Rei Kakuhata, Takahiko Nojima, Yasuo Shinohara, Yoshinobu Baba, Teruo Fujii,
Tópico(s): Viral Infectious Diseases and Gene Expression in Insects
2008 - Springer Nature | Analytical Sciences
Eiji Shamoto, Tatsuya Mori, Burak Sencer, Norikazu Suzuki, Rei HINO,
This paper presents a new method and its analysis to suppress regenerative chatter vibration in simultaneous multiple milling with a flexible mechanical structure. Precision steel plates are conventionally finished by one-sided face milling with a rigid electro-magnetic chuck. However, it is difficult to obtain the desired flatness with this method since the thin workpiece deforms to fit the chuck surfaces when chucked. The authors have solved this problem to realize both high accuracy and productivity ...
Tópico(s): Advanced Surface Polishing Techniques
2013 - Elsevier BV | Precision Engineering
Eiji Shamoto, Shunsuke Fujimaki, Burak Sencer, Norikazu Suzuki, Takashi Kato, Rei HINO,
This research presents novel strategies to optimize tool path/posture to avoid chatter vibration in various machining operations. It is well known that the chatter stability depends on tool geometry and cutting conditions; whereas it is less known that it also depends on tool path/posture relative to the dynamically most compliant direction. In order to realize an intelligent tool path/posture planning with consideration of the chatter stability, a simple index is proposed to represent the machining ...
Tópico(s): Engineering Technology and Methodologies
2012 - Elsevier BV | CIRP Annals
Norikazu Suzuki, Y. Kurata, Takashi Kato, Rei HINO, Eiji Shamoto,
Analysis of the stability limits in self-excited chatter vibration requires the transfer function of the mechanical structure, and thus the accuracy of the analytical prediction strongly depends upon the accuracy of the transfer function, which is generally measured by the impulse response method. However, it is often difficult to measure the transfer function accurately, especially in a case where a small-diameter tool or a workpiece is flexible, or when the transfer function changes as a result ...
Tópico(s): Advanced Machining and Optimization Techniques
2012 - Elsevier BV | Precision Engineering
Norikazu Suzuki, Takuya Kojima, Rei HINO, Eiji Shamoto,
It is known that regenerative effect, which causes self-excited chatter vibration, can be suppressed in many cases by utilizing irregular pitch tools. In order to suppress the regenerative effect sufficiently, a suitable combination of irregular pitch angles needs to be designed. Although the past researches proposed a basic idea to design irregular pitch angles for the regeneration suppression, they are only applicable to the suppression of single-mode regeneration. The present study proposes a ...
Tópico(s): Surface Treatment and Residual Stress
2012 - Elsevier BV | Procedia CIRP
Norikazu Suzuki, Tsutomu IKADA, Rei HINO, Eiji Shamoto,
Chatter vibrations limit machining productivity and sometimes result in reduction of tool life in the end-milling process. There are two major types of chatter vibrations, i.e., forced and self-excited types. Their generation mechanics are different, and thus their characteristics and strategies to avoid them are also different. It is, therefore, needed in practice to understand their relationship and to select efficient milling conditions to stabilize the process for the self-excited chatter vibration ...
Tópico(s): Advanced Surface Polishing Techniques
2009 - | Journal of the Japan Society for Precision Engineering
Rei HINO, Toshimichi MORIWAKI,
A new information exchange method named recursive propagation is proposed in order to solve job shop scheduling problems in decentralized manufacturing systems. Each machine only has to notify the change of its plan to other machines which are directly influenced by the change. The effect of the change in the plan is directly fed back to the machine which notified the change. The change in the plan is notified to all the machines concerned by simple one-to-one communication among the machines, and ...
Tópico(s): Optimization and Search Problems
2002 - Japan Society Mechanical Engineers | JSME International Journal Series C
Norikazu Suzuki, Zhenmin Yan, Makoto Haritani, Jibin Yang, Seiji Hamada, Rei HINO, Eiji Shamoto,
‘Ultrasonic elliptical vibration cutting’ technology is applied in the present research to ultraprecision machining of tungsten alloy, which is expected as a material of molds for glass parts instead of sintered tungsten carbide or CVD-silicon carbide. It is confirmed that ulptraprecision grooving of the tungsten alloy cannot be realized by the ordinary cutting. On the other hand, it can be realized by the elliptical vibration cutting at a cutting depth of less than 0.8 μm. Effects of the cutting ...
Tópico(s): Advanced materials and composites
2007 - | Journal of the Japan Society for Precision Engineering
Takuya Kojima, Norikazu Suzuki, Rei HINO, Eiji Shamoto,
Regeneration is major mechanism to generate self-excited chatter vibration in cutting. Variable helix cutters are useful to suppress regeneration. Although optimization of pitch/helix angles is significantly important at the same time, there is no practical design method to optimize the variable helix cutter geometry so far. In order to attain robust regeneration suppression, a new design method of variable helix cutters is proposed in the present study. The pitch angles vary along axial position ...
Tópico(s): Advanced Surface Polishing Techniques
2013 - Elsevier BV | Procedia CIRP
Jae Kyu YOO, Yoshiaki Shimizu, Rei HINO,
There usually exist large variations in assembly times at mixed-model assembly lines depending on difference of product-models. To increase efficiency of line handling under such circumstance, this paper concerns with a sequencing problem for the mixed-model assembly lines where each product is supposed to be assembled within the same cycle time. Then, we formulate a new type of the sequencing problem minimizing the weighted sum of the line stoppage times and the idle times, and propose a new sequencing ...
Tópico(s): Scheduling and Optimization Algorithms
2005 - Japan Society Mechanical Engineers | JSME International Journal Series C
Toshimichi MORIWAKI, Rei HINO,
Tópico(s): Surface Treatment and Coatings
1991 - | Journal of the Japan Society for Precision Engineering
Eiji Shamoto, Young Chan Song, Kengo SASSA, Hideki Yoshida, Rei HINO, Toshimichi MORIWAKI,
The present paper proposes a new "oblique" type of elliptical vibration cutting, while the previous method is distinguished as an "orthogonal" type. The oblique type of elliptical vibration cutting is technically similar to the orthogonal type proposed previously by the present authors, but its machining principle and features are different from the previous orthogonal type. A simple analytical model of the oblique type of elliptical vibration cutting process is developed to understand its mechanics ...
Tópico(s): Metal Forming Simulation Techniques
2003 - | Journal of the Japan Society for Precision Engineering
Jianguo Zhang, Norikazu Suzuki, Takashi Kato, Rei HINO, Eiji Shamoto,
Tungsten carbide is a crucial material for glass molding in optical industry. The present study investigated a feasibility of ductile machining of sintered tungsten carbide for glass molding by applying ultrasonic elliptical vibration cutting technology with single crystal diamond tool. Grain size and binder material of sintered tungsten carbide have an influence on hardness and/or toughness of the material. Binder material also has a chemical affinity to diamond. In order to examine the influence ...
Tópico(s): Advanced materials and composites
2012 - Trans Tech Publications | Key engineering materials
Eiji Shamoto, Rei HINO, T. Tomie, Yosuke MATSUBARA, Toshimichi MORIWAKI,
A new method is proposed in the present research to estimate thermal deformation of machine tools. The present method utilizes available information in CNC units instead of external sensors such as thermocouples and strain gages. An estimation model utilizing transfer functions and a method to identify them are developed, and it is applied to estimation of the thermal deformation of a machining center caused by rotation of its main spindle and feed motion of the tables. The transfer function matrix ...
Tópico(s): Laser and Thermal Forming Techniques
2003 - Japan Society Mechanical Engineers | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
Yôhei Hashimoto, Norikazu Suzuki, Masakazu Asaba, Rei HINO, Eiji Shamoto,
A soft EHL analysis model of Chemical Mechanical Polishing (CMP) is developed in the present study. Since a surface of a polishing pad is filled with micro asperities due to conditioning, the polishing pad deforms in a nonlinear manner by contacting to a wafer. A viscosity of the polishing pad also affects stress concentration beneath the edge of the wafer. In order to take into account both effects, damping behavior of the polishing pad and macroscopic characteristics of the polishing pad asperity ...
Tópico(s): Advanced machining processes and optimization
2013 - | Journal of the Japan Society for Precision Engineering
Eiji Shamoto, Masahiro Kato, Norikazu Suzuki, Rei HINO,
A new and basic analytical model of three-dimensional cutting is proposed by assuming multiple thin shear planes with either the maximum shear stress or minimum energy principle. The three-dimensional cutting process with an arbitrarily shaped cutting edge in a flat rake face is formulated with simple vector equations in order to understand and quickly simulate the process. The cutting edge and workpiece profile are discretized and expressed by their position vectors. Two equations among three unknown ...
Tópico(s): Manufacturing Process and Optimization
2013 - ASM International | Journal of Manufacturing Science and Engineering
Rei HINO, Toshimichi MORIWAKI,
This paper describes a method to improve allocation and re-allocation of resources in manufacturing systems, such as machine tools and robots that are linked by carriers such as AGVs. The proposed method uses the result of scheduling as an index of suitability of the resource allocation. The behaviors of AGV are analyzed and included in the production scheduling problem. The production scheduling problem is solved by employing some well-known dispatching rules. The search for the best scheduling ...
Tópico(s): Optimization and Packing Problems
2003 - | Journal of the Japan Society for Precision Engineering
This paper describes a procedure for local modifications of a job shop schedule planned under a no-buffer constraint. The modifications are to correct the infeasibility caused by exchanging two consecutive operations on the same machine. An extended disjunctive graph, which has reverse conjunctive arcs connecting two consecutive processes, is introduced to identify the operations preventing the feasibility of such a schedule. By exchanging the operating order of these operations, the obtained infeasible ...
Tópico(s): Optimization and Search Problems
2012 - Japan Society Mechanical Engineers | Journal of Advanced Mechanical Design Systems and Manufacturing
Rei HINO, Eiji Shamoto, Toshimichi MORIWAKI,
This paper presents an effective tool path generation method for machining of free-form surfaces of molds and dies with ball end mills. Parametric surfaces are generally adopted to represent free-form surfaces of products by progress of CAD systems. The proposed method is to generate the tool path immediately by referring to the parametric surface equation such as NURBS form. Therefore the tool path is generated easily even when the geometry of the cutting tool changes. It can also generate accurate ...
Tópico(s): Advanced machining processes and optimization
2003 - | Journal of the Japan Society for Precision Engineering
Y. Kurata, Norikazu Suzuki, Rei HINO, Eiji Shamoto,
Self-excited chatter vibration in end milling is caused by the regeneration and mode coupling mechanisms. In order to avoid chatter vibration, both mechanisms need to be investigated. Past researches have shown that the mode coupling effect in end milling can be suppressed by using cutting tools with anisotropic dynamic characteristics. However, it is difficult to apply previously developed analytical models for predicting the chatter stability limits in end milling with the anisotropic tools. Hence, ...
Tópico(s): Tunneling and Rock Mechanics
2011 - | Journal of the Japan Society for Precision Engineering
Rei HINO, Tetsuya Kusumi, J. Yoo, Yoshiaki Shimizu,
A scheduling problem is formulated in order to consistently manage every production resource such as machine tool, assembly robot, AGV, storehouse, material shelf, and so on. The production resources are classified into three devices, which are producer, location, and mover. This paper especially focuses on a role of buffer, and the differences among these devices are analyzed. A unified scheduling formulation is derived from the results of the analysis based on the role of the devices. Scheduling ...
Tópico(s): Optimization and Packing Problems
2005 - Japan Society Mechanical Engineers | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
Rei Hino, Toshimichi MORIWAKI,
A new concept of holonic manufacturing system is proposed in order to overcome limitations of the autonomous decentralized manufacturing system concept and construct next generation of manufacturing systems. The concept proposed here is an extension of the concept of holon, which is proposed by A. Koestler 1967, from the point of view of autonomy and cooperation of a system element. Autonomous and cooperative behavior of the system is defined according to the structure of the manufacturing system, ...
Tópico(s): Flexible and Reconfigurable Manufacturing Systems
2001 - Japan Society Mechanical Engineers | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
Rei HINO, Toshimichi MORIWAKI,
A new information exchange method named recursive propagation is proposed in order to solve job shop scheduling problems in decentralized manufacturing system. Each machine has only to notify the change of its plan to other machines which are directly influenced by the change. The effect of the change in the plan is directly fed back to the machine which notified the change. The change in the plan is notified to all the machines concerned by simple one to one communication among the machines, and ...
Tópico(s): Advanced Manufacturing and Logistics Optimization
2000 - Japan Society Mechanical Engineers | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
This study deals with the no-buffer job-shop scheduling problem to avoid head-on collisions on bidirectional path for AGV transport schedules in manufacturing plants. The no-buffer job-shop scheduling problem allows schedules in which the resources processed by two products are swapped, but such schedules cause head-on collisions in the bidirectional path in the AGV transport schedule. The situation of head-on collision is analyzed mathematically, and constraint conditions are clarified to the collisions. ...
Tópico(s): Advanced Manufacturing and Logistics Optimization
2023 - Japan Society Mechanical Engineers | The Proceedings of Manufacturing Systems Division Conference
The aim of this paper is to construct a specialized method of path planning for transportation in a conveyance system composed of automated vehicles running on uni-directional rails in a manufacturing factory. In the conveyance system, there exist redundant rails in addition to the rails that directly connect any two production resources. Every vehicle is permitted to run on roundabout rails to avoid other vehicles stopped on the rail in front of the production resource, thus allowing it to arrive ...
Tópico(s): Vehicle Routing Optimization Methods
2012 - Fuji Technology Press Ltd. | International Journal of Automation Technology
Necessary and sufficient conditions for material handling scheduling are clarified in order to construct a flexible and agile transportation system composed of multiple conveyor belts. In addition to a conventional straight forward belt, a special type of belt is adopted to change the material flow direction when transporting a product between two manufacturing resources. In the present paper, three essential motions of the belts are identified, which are translation on the belt, transition between ...
Tópico(s): Assembly Line Balancing Optimization
2012 - | Journal of the Japan Society for Precision Engineering
Norikazu Suzuki, Rei HINO, Eiji TSUCHIYA, Eiji Shamoto,
A new ultrasonic elliptical vibration tool is developed in the present research to realize sculptured surface machining of die steel by applying "elliptical vibration cutting". The new vibration tool is designed to have three degree-of-freedom (3 DOF), so that it is suitable to machine the three-dimensional sculptured surfaces. The 3 DOF ultrasonic elliptical vibration tool generates an arbitrary ultrasonic elliptical vibration in the three-dimensional space by combining two directional bending vibrations ...
Tópico(s): Advanced Machining and Optimization Techniques
2007 - | Journal of the Japan Society for Precision Engineering
Rei HINO, Yusuke Kodama, Norikazu Suzuki, Eiji Shamoto,
A scheduling problem is formulated focusing on jobs stored in production resources in the present paper. In a production system with finite buffer capacity, the job are stored in not only buffers but also production resources such as machine tools and assembly robots. Therefore, successive jobs cannot be processed by the resources until the previous jobs are removed from them. In such a scheduling problem, certain processing orders of jobs are infeasible because start times and release times of ...
Tópico(s): Advanced Manufacturing and Logistics Optimization
2007 - Japan Society Mechanical Engineers | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
Eiji Shamoto, Hidetaka MATSUO, Rei HINO, Toshimichi MORIWAKI,
Two driving methods based on the principle of 'walking drive' are summarized and compared in the present research. The predetermined displacement patterns are applied to the piezoelectric actuators in one method, and the patterns are generated in real time in the other method. Their characteristics are clarified, e.g. the former method is easier to implement while the latter can reduce the number of actuators. A compact XTθ table is developed based on the latter method. The developed XYθ table has ...
Tópico(s): Adhesion, Friction, and Surface Interactions
2001 - | Journal of the Japan Society for Precision Engineering
Rei Kobayashi, Masahiro Kaji, Sho Horiuchi, Naofumi Miyahara, Yumi Hino, Keiichi Suemasu,
Stiff-person syndrome (formerly known as stiff-man syndrome) is a very rare autoimmune and neurogenic disorder, thought to present as a paraneoplastic variant in association with thymoma. Pure red blood cell aplasia is also a paraneoplastic disorder associated with thymoma. Although separate cases of stiff-person syndrome and pure red blood cell aplasia have been reported, we describe here what is to our knowledge the first case of recurrent thymoma with both stiff-person syndrome and pure red blood ...
Tópico(s): Neuroblastoma Research and Treatments
2014 - Elsevier BV | The Annals of Thoracic Surgery