摘要:
A wire sawing apparatus includes a wire, a wire feed roller, and two basic rollers. The three rollers have the same diameter and are arranged in such a manner that their axes of rotation are in parallel with one another. Cutting-positioning circumferential grooves are formed on the two basic rollers at axially paired same positions. Intermediate circumferential grooves are formed on the wire feed roller and arranged in the axial direction such that the axial position of each intermediate circumferential groove corresponds to an axially central position between two adjacent pairs of cutting-positioning circumferential grooves. The wire is spirally wound a plurality of turns on the three rollers while being fitted into the circumferential grooves.
摘要:
A wire sawing apparatus includes a wire, a wire feed roller, and two basic rollers. The three rollers have the same diameter and are arranged in such a manner that their axes of rotation are in parallel with one another. Cutting-positioning circumferential grooves are formed on the two basic rollers at axially paired same positions. Intermediate circumferential grooves are formed on the wire feed roller and arranged in the axial direction such that the axial position of each intermediate circumferential groove corresponds to an axially central position between two adjacent pairs of cutting-positioning circumferential grooves. The wire is spirally wound a plurality of turns on the three rollers while being fitted into the circumferential grooves.
摘要:
A piezoelectric/electrostrictive actuator includes a plurality of piezoelectric/electrostrictive elements arranged in comb teeth-like alignment on a base plate. The actuator is driven by means of dislocation of the piezoelectric/electrostrictive elements. The cell driving type actuator is characterized in that each of the cells is formed independently from adjacent cells by positioning cover plates between two adjacent piezoelectric/electrostrictive elements. Thus, there is provided a piezoelectric/electrostrictive actuator wherein a heating process at a high temperature can be applied and mass production at low cost is possible. The actuator includes cells with slit portions having a width of 60 μm or less and a high aspect ratio and can be activated with high electric field strength, and great displacement can be obtained with small electric field strength.
摘要:
A punch apparatus for punching and laminating simultaneously a plural number of thin sheets is disclosed. This punch apparatus includes a punch provided on an upper portion of the punch apparatus, a die provided on a lower portion of the punch apparatus and used for punching a material to be processed, a stripper for guiding the punch during punching operation, a device for laminating punched materials using the punch as a laminating axis, a device for adjusting a relative position between the punch and the stripper when the upper and the lower portions of the punch apparatus are separated, and a device for adjusting a clearance between the die and the stripper during punching operation. The punch apparatus can open precisely almost straight very fine through-holes of a diameter of 100 μm or less even in a sheet of thin, soft and deformable material.
摘要:
A micro pump having at least one pump member for conveying a fluid by action of pressure includes a pump unit formed by at least one actuator member for generating a pressure fluctuation and a fluid channel in which the fluid flows. The actuator member provided with a cell formed by disposing two side walls made of piezoelectric/electrostrictive elements or antiferrodielectric elements on a connecting plate, and covering a surface facing the connecting plate between the side walls with a cover plate. The actuator member selectively forms the fluid channel and generates pressure fluctuation in the fluid channel member due to displacement of the cell caused by expansion/contraction of the side walls. The micro pump is small and thin in size, while attaining increasing fluid ejection amounts, and a thigh speed in response.
摘要:
A multislit type actuator including a plurality of piezoelectric actuators aligned and allocated like teeth of a comb formed on a substrate, wherein a condition of crystal grains in side surfaces of the piezoelectric actuators forming wall surfaces of a slit between the comb teeth is that the crystal grains under transgranular fracture are 1% or below.
摘要:
A micro pump member is provided, in which a plurality of cells formed in a base part are used as pressurizing chambers, and side walls forming the pressurizing chambers are constructed by piezoelectric/electrostrictive elements. The volume of the pressurizing chambers is changed by the displacement of the piezoelectric/electrostrictive elements to produce a pressure in the pressurizing chambers. The pressurizing chambers are formed independent of adjacent pressurizing chambers. Activation can be carried out by applying a driving electric field having a high field strength to the pressurizing chambers, so that a greater displacement and a higher response can be obtained with a smaller field strength.
摘要:
A piezoelectric actuator includes comb teeth-shaped piezoelectric actuators, each comprising plural piezoelectric layers. A side surface of each tooth is fired. Actuators are made by (1) preparing a plurality of piezoelectric material green sheets on which electrode films are formed and forming slits on a first green sheet using a punch and a die, (2) pulling up the first green sheet using a stripper, (3) pulling up a top portion of the punch slightly from the lowest portion of the pulled up first green sheet, (4) forming second slits in a second green sheet by the punch, (5) pulling up the second green sheet jointly with the first green sheet, and (6) pulling up the top portion of the punch slightly from the lowest portion of the pulled up second green sheet, and thereafter laminating green sheets by repeating steps (4) through (6). The layers can thereafter be fired.
摘要:
A piezoelectric actuator includes comb teeth-shaped piezoelectric actuators, each comprising plural piezoelectric layers. A side surface of each tooth is fired. Actuators are made by (1) preparing a plurality of piezoelectric material green sheets on which electrode films are formed and forming slits on a first green sheet using a punch and a die, (2) pulling up the first green sheet using a stripper, (3) pulling up a top portion of the punch slightly from the lowest portion of the pulled up first green sheet, (4) forming second slits in a second green sheet by the punch, (5) pulling up the second green sheet jointly with the first green sheet, and (6) pulling up the top portion of the punch slightly from the lowest portion of the pulled up second green sheet, and thereafter laminating green sheets by repeating steps (4) through (6). The layers can thereafter be fired.
摘要:
An intermediate laminated structure is provided including a plurality of unfired ceramic plates stacked along a laminating direction. Each of the plates has a plurality of holes formed therethrough by a punching operation. At least a first hole in one of the plurality of unfired ceramic plates has the same shape and cross-sectional area as respective first holes in the remaining plurality of unfired ceramic plates such that the first holes define a cylinder of constant cross-sectional area throughout the entire thickness of the intermediate laminated structure.