Abstract: The present invention provides an inexpensive chuck device that can achieve both a stable gripping operation and a high degree of accuracy in gripping and can also reduce limitations in the gripping of a workpiece. According to the present invention, a chuck device is provided, the chuck device being characterized by comprising a chuck main body and a master jaw, wherein the chuck main body has an oscillation supporting hole, and the oscillation supporting holes are rotatably provided in plurality around a rotational axis of the chuck main body, and wherein the master jaw has a top jaw detachably provided on one end thereof, and is fitted into the oscillation supporting hole while maintaining surface contact therewith to enable sliding contact.

Abstract: A new method capable of evaluating wettability of a surface of a material is provided. The method includes the following: applying a gas jet to a surface of a material that is covered with a liquid so as to squeeze the liquid; imaging a surface of a liquid film formed on the surface of the material after squeezing the liquid; and evaluating wettability of the material based on the presence or absence of interference fringes on the surface of the liquid film.

Abstract: A gripping method for a turbocharger housing used to process a turbocharger housing formed by casting, includes a scroll formed in a spiral shape from an axial center, and a large diameter hole and a small diameter hole provided along an axial direction of the scroll with space therebetween, such as to face each other. After positioning of the turbocharger housing is performed using an end surface of the large diameter hole facing the small diameter hole as a reference surface for positioning in the axial direction, an inner diameter of the large diameter hole is gripped.

Abstract: [Problems] A gripping method for a turbocharger housing and a work gripping device that can accurately grip an inner diameter using a reference for shape during casting when processing. [Means for Solving Problems] In a gripping method of a turbocharger housing W, an end surface Y of a large diameter hole 22 facing a small diameter hole 25 is used for positioning in an axial direction. The inner diameter of the large diameter hole 22 is then gripped. A work gripping device 1 includes a cylindrical body 2, a plunger 3 that moves back and forth along an axial direction of the body 2, a jaw 4 that moves in a radial direction of the body 2 in tandem with the plunger 3, and a pusher 6 that presses the work W in a direction away from the body 2 in accompaniment with movement of the plunger 3. The jaw 4 includes a gripping surface 24 that grips the work W and a contact surface 5 that projects in an outward radial direction from an end edge of the gripping surface 24 away from the body 2.

Abstract: An apparatus for transferring workpieces to and from the chuck of a machine tool. A gripper arm is mounted to the machine frame for selectively axial and rotational movement on a shaft having helical and longitudinal threads on the surface thereof. A first nut is rotatably mounted to the machine frame for axial advancement of the shaft and a second nut is rotatably mounted for rotational advancement. The apparatus may also include a panel mounted to the machine frame between a transfer station and the chuck. An opening in the panel adjacent the transfer station has surfaces which mate with corresponding surfaces of the gripper arm so as to preclude the passage of debris to the transfer station. The apparatus may also include an apparatus for sequentially transferring a series of workpieces. The apparatus has a two gripper jaws and a compressible pusher plate therebetween which is compressed as it is moved towards an opening in an input chute so that a workpiece may roll between the jaws of the gripper.

Abstract: Even though the shape and size of an aluminum wheel to be chucked for machining is changed, it is possible to easily deal with this situation and to simply chuck the same. In a finger chuck which finger levers 5 are swingably mounted in the radius direction via fulcrum point parts 8 installed at adequately spaced positions in the circumferential direction of the outer circumference of a chuck body, the front end face part of the chuck body front part, which constitutes the front portion of said fulcrum point parts, is eliminated, a plurality of front end face parts 12 which are intended to be selectively replaced and mounted at said eliminated portion are formed integral with each other, and at this time said plurality of front end face parts are provided with a clamp seat 14 and a centering member 23 so that each of said front end face parts can be applied to specified kinds of different workpieces w.

Abstract: An apparatus for transferring workpieces to and from the chuck of a machine tool. A gripper arm is mounted to the machine frame for selectively axial and rotational movement on a shaft having helical and longitudinal threads on the surface thereof. A first nut is rotatably mounted to the machine frame for axial advancement of the shaft and a second nut is rotatably mounted for rotational advancement. The apparatus may also include a panel mounted to the machine frame between a transfer station and the chuck. An opening in the panel adjacent the transfer station has surfaces which mate with corresponding surfaces of the gripper arm so as to preclude the passage of debris to the transfer station. The apparatus may also include an apparatus for sequentially transferring a series of workpieces. The apparatus has a two gripper jaws and a compressible pusher plate therebetween which is compressed as it is moved towards an opening in an input chute so that a workpiece may roll between the jaws of the gripper.

Abstract: A coupling mechanism for a rotary fluid cylinder which comprises a rotary member and a fluid feeding member concentrically mounted on said rotary member, at least one fluid passage being formed for supplying fluid from the fluid feeding member to the rotary member even while the rotary member is rotating. The coupling mechanism comprises a pair of rolling bearings interposed between the fluid feeding member and the rotary member at the respective extreme ends of the fluid feeding member so as to allow relative rotation of the rotary member with respect to the fluid feeding member. A biasing member for applying a predetermined pre-load to the respective rolling bearing is provided. The applied pre-load acts on the rolling bearings in such a manner that the rolling bearings are biased to move away from each other in their axial direction.

Abstract: In apparatus for removing water and impurity components from sand, there are provided a rotary member having an opening at one end for charging and discharging sand and a filter for passing water. The rotary member is supported by a support and driven by a variable speed motor. Piston-cylinders or the like are provided for tilting the support. In a modified embodiment, two of the rotary bodies are juxtaposed with their openings faced each other. A peripheral wall of the rotary member is provided with a member of perforations for discharging water separated from sand.

Abstract: In a rotary fluid cylinder for operating a chuck of the type comprising a piston rod, guide rods disposed in parallel with the piston rod, spring biased check valve mechanism and pilot valve mechanism operating the check valve mechanism both contained in each guide rods, there are provided a pair of diametrically opposed annular pistons concentric with the piston rod, guide rods being received in the annular pistons for guiding longitudinal movements thereof, a cylinder head rotatably mounted on the piston rod, a rotary valve connected to the cylinder head for defining cylinders for accommodating the pair of annular pistons, a sleeve rotatably mounted on the rotary valve, and valve means for alternately admitting operating fluid in the opposite sides of each annular piston.

Abstract: In apparatus for removing water and impurity components from sand, there are provided a rotary member having an opening at one end for charging and discharging sand and a filter for passing water. The rotary member is supported by a support and driven by a variable speed motor. Piston-cylinders or the like are provided for tilting the support. In a modified embodiment, two of the rotary bodies are juxtaposed with their openings faced each other. A peripheral wall of the rotary member is provided with a member of perforations for discharging water separated from sand.

Abstract: This invention relates to a cooling mechanism of a rotary hydraulic cylinder for chucking operation of machine tools. In a rotary hydraulic cylinder which consist of a rotor member having a reciprocable piston inside and in which working oil is fed to the piston in said rotor member, many fins are mounted, parallel to the movements of said piston rod, on the outer periphery of said working oil supplying member, and a cylinder-like cover whose side facing to said rotor member is folded inside to make a flange, is mounted at the edge, of said fins, facing said rotor, so that it may partially enclose the outer peripheral surface of said rotor member. The side of the rotor member enclosed by said cylinder-like cover, of said oil supplying member is provided with a rotary fan which rotates together with said roller member, thereby causing an air inlet opening of a fixed clearance between said cover and the rotary fan to be formed.

Abstract: The invention provides a chamber, or tank, sealable by closing its cover and in which green lumber, agricultural products and/or earthenware to be dried can be artificially dried to the desired degree, or in which they can be provided with insect-proofing and/or rot-proofing treatment or coloring treatment as well as said drying treatment.The chamber has means for measuring the degree of drying or moisture content of the material to be dried, and means to heat, moisten or dampen the inside of the chamber and to reduce the inside pressure of the chamber.Such processes (drying, moisturizing and pressure reduction) are carried out in several steps, thereby changing the atmospheric conditions in the chamber in phased programs. This control is performed by checking the drying condition of the material as it is in the chamber. Moreover, unmanned operation is thereby easily secured by converting the drying condition to electrical signals and automatically setting the running conditions with those signals as input.

Abstract: A method and apparatus for preparing a stabilized and hardened layer, by which extensive and deep-layered zones of clay, silt, and/or sand (hereinafter referred in as "Weak Soil Layer") in such places as rivers, lakes, marshes, harbors and/or the sea may be easily turned into stabilized foundation ground necessary for civil construction, the surface layer of said weak soil layer being partially or wholly turned into stabilized foundation ground at or to a fixed depth by stabilization treatment of said weak soil layer with a solidifier agent including cement.