Mechano Transformer Corporation

Kawasaki, Japan

Mechano Transformer Corporation

Kawasaki, Japan

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Patent
Satake Corporation, Mechano Transformer Corporation and Kuroda Pneumatics Ltd. | Date: 2012-11-29

A piezoelectric valve whose assembly work can be efficiently performed. A piezoelectric valve according to this invention includes a valve main body having a gas pressure chamber which receives compressed gas supplied from the outside, a plate which is disposed inside the valve main body and is fixed to the valve main body, and actuators each of which has a valve element, a piezoelectric element generating, in the form of a displacement, driving force required for operation of the valve element, and a displacement magnification mechanism for magnifying a displacement of the piezoelectric element and causing the magnified displacement to act on the valve element, are fixed to each of two surfaces of the plate, and are disposed inside the valve main body together with the plate.


Chee S.K.,Mechano Transformer Corporation | Suzuki H.,Chubu University | Okada M.,Chubu University | Yano T.,Mechano Transformer Corporation | And 2 more authors.
Advanced Materials Research | Year: 2011

Demands of precision molds with complicated microstructures for digital devices such as DVD pick-up system, medical devices such as μ-TAS and solar optics etc. are increasing [1 - 5]. The structured molds must be polished after grinding or cutting in order to improve the surface roughness. In this paper, a two dimensional low frequency vibration (2DLFV) polishing actuator using PZT is proposed and developed. The 2DLFV consists of 4 mechanical amplitude magnified actuators (MechaTrans), a multilayer stacked piezoelectric actuator (PZT) incorporated with mechanical transformer, and a center piece. Mechanical transformer is a kind of flexure hinges structured that magnifies the stroke of the multilayer stacked piezoelectric actuator around 7 times to 120 μm. With this actuation, the tool vibrates in a circle trajectory to achieve polishing effect. In the polishing experiments, tungsten carbide molds (workpieces) are polished with diamond slurry. The surface roughness of the work pieces and polishing efficiency are evaluated. From the experimental results, it was found that low frequency vibration especially 2DLFV is a useful polishing system for micro structured mold. © (2011) Trans Tech Publications, Switzerland.


Lin W.M.,Gunma University | Chee S.K.,Mechano Transformer Corporation | Suzuki H.,Chubu University | Higuchi T.,University of Tokyo
Advanced Materials Research | Year: 2013

Demands of precision molds with complicated microstructures for digital devices such as DVD pick-up system, and medical devices such as μ-TAS and solar optics etc. are increasing. To enhance precision, the structured molds must be polished after grinding or cutting in order to improve the surface roughness. In this paper, a two-dimensional low frequency vibration (LFV) polishing actuator using PZT is proposed and developed. The LFV consists of four mechanical amplitude magnified actuators, a multilayer stacked piezoelectric actuator (PZT) incorporated with mechanical transformer, and a center piece. In the polishing experiments, HIPM workpieces were polished with WA slurry by the rotation and revolution type polishing method (RRP). The surface roughness of the work pieces and material removal amount (polished amount) was also evaluated. From the experimental results, it was found that the application of low frequency vibration is useful for realizing higher precision in the polishing of micro structured molds. © (2013) Trans Tech Publications, Switzerland.


Guo J.,RIKEN | Chee S.K.,Mechano Transformer Corporation
Sensors and Actuators, A: Physical | Year: 2015

The paper presents an experimental study on the key characteristics of a magnetostrictive vibrator being developed for polishing application. Firstly, the actuation principle is systematically illustrated by a general model and experimentally verified by measuring magnetic fluxes flowing in the legs of the vibrator. Then the vibration mode is analyzed by finite element method and proved by node position test. It is found that the experiment result shows good consistent with that of simulation. After that, the effect of external stress on vibration amplitude is tested and the result indicates that under the stress of 0-1 N, the vibration amplitude shows in a rough proportion relationship to the stress. However, when the stress is less than 100 mN, vibration amplitude is almost not changed. Finally, the heat generation of the vibrator is evaluated, and a cooling device is developed for effectively decreasing the operating temperature. © 2014 Elsevier B.V. All rights reserved.


Yano A.,Mechano Transformer Corporation
Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C | Year: 2010

Piezoelectric actuators using piezoelectric element displacement magnifying mechanism are applied to many kinds of mechanical devices. However, the design of displacement magnifying mechanism depends on experiences and skills of designers and takes much time for optimizing the structure. In this paper the method of structural optimization for displacement magnifying mechanism using FEM and sequential linear programming is proposed. First, the sensitivities of the typical functions, that is, the displacement of nodes, the force of output node, the stress of each elements and the static energy transfer efficiency are formulated. The dictionary of sequential linear programming is constructed out of these sensitivities. Then the optimization procedure which starts from a roughly designed fundamental structure of magnifying mechanism is constructed. Finally the method is applied to an example of punching device to confirm the robustness of the method and the propriety of the optimized structure from the mechanical engineering point of view.


Guo J.,University of Tokyo | Chee S.K.,Mechano Transformer Corporation | Yano T.,Mechano Transformer Corporation | Higuchi T.,University of Tokyo
Sensors and Actuators, A: Physical | Year: 2013

In this paper, a novel micro-vibration stage composed of four piezo actuators and a flexure hinge is proposed and developed. Each piezo actuator is developed by a new type of stroke magnifying mechanism incorporated with a multi-stacked PZT (lead zirconate titanate) and it is capable of performing micro vibrating motion. The flexure hinge, used to connect the piezo actuators, is designed to reduce the mutual interference of the linear motion of piezo actuators between two orthogonal directions and realize the in-plane parallel kinematic 2D vibration. According to the experimental results, the micro-vibration stage can generate large vibration amplitude up to 100 μm in two orthogonal directions independently at a frequency of 1100 Hz, and the vibration traces like line, circle and ellipse are acquired. © 2013 Elsevier B.V.


Patent
WAC Data Service Co. and Mechano Transformer Corporation | Date: 2015-04-15

This invention relates to a needle selector to behave at a higher speed that can narrow a gap further between fingers in the vertical direction. Driving means generates driving force to cause displacement between two first positions on a first arc in a given plane. A finger includes a subject part to receive the driving force and an action part to act on a working needle or a jack. The action part is formed to be opposite the subject part. The subject part is formed into a cam. In response to application of the driving force to the subject part resulting from displacement to one of the first positions, the action part is displaced to one of two second positions on a second arc in the plane having a chord extending in a direction crossing the direction of the chord of the first arc..


Patent
Mechano Transformer Corporation and Satake Corporation | Date: 2011-05-13

A piezoelectric valve comprising: a valve main body formed in which are a gas pressure chamber that takes in compressed gas supplied from the outside as well as a gas release channel through which the compressed gas is released from the gas pressure chamber; a valve body placed in the gas pressure chamber to open and close the gas release channel; a piezoelectric element that generates, in the form of displacement, a driving force needed to operate the valve body; at least one displacement amplification mechanism that amplifies a displacement of the piezoelectric element and causes it to act upon the valve body; and a driving means for applying voltage to the piezoelectric element in order to drive the valve body to open the valve and thereby open the gas release channel; wherein such piezoelectric valve is characterized in that the driving means applies voltage to the piezoelectric element in multiple stages so as to suppress fluctuation in the amount of gas ejected from the gas release channel when the valve opens.


Patent
Satake Corporation and Mechano Transformer Corporation | Date: 2014-11-17

A protruding section formed at the one side end of a connector section provided in a valve is inserted into a recessed section formed as part of a valve placement section of a fluid apparatus. The valve is caused to pivot with the inserted portion that serves as a supporting point, and an engaging section formed at the front end of a lever of a hook section formed at the other side end of the connector section is allowed to engage with an engaging protruding section formed as part of the valve placement section of the fluid apparatus. The valve is thus attached to the fluid apparatus.


Patent
Mechano Transformer Corporation and Satake Corporation | Date: 2013-05-31

An optical granular material-sorting apparatus includes: a transfer means for transferring objects being sorted; an optical detection means for detecting, at a detection position, objects being sorted as they drop from an end of the transfer means; and a blasting means provided below the optical detection means and designed to blow away objects being sorted through blasting of air based on the result of detection by the optical detection means. The blasting means has a piezoelectric valve which is driven by a driving means to blast air based on the result of detection by the optical detection means. The driving means applies voltage to a piezoelectric element in multiple stages so as to suppress fluctuation in the amount of gas ejected from a gas release channel when the valve opens.

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