Abstract: A lapping device is provided that is capable of precisely lapping a surface of an object having a complicated shape, the lapping device including a driving unit, a shank connected to the driving unit through a driving shaft, and a lapping portion coupled to the shank. The lapping portion includes an abrasive layer and an elastic member between the abrasive layer and the shank.

Abstract: A smoothing/polishing tool (10) of the type including a hollow cylindrical body (1), a plurality of expansion sectors (4) for a plurality of abrasives (6) integrally mounted on the external surface of an elastic bushing (7), fit on the expansion sectors (4). The tool (10) includes at least one key (11) insertable in one or more cavities (12) or notches obtained along one or more sectors (4); the key (11) bears one or more teeth (11A) adapted to interfere and be engaged with corresponding one or more holes or slits (13) obtained on the bushing (7); following the rotation of the smoothing/polishing tool (10), the key (11) drives the bushing (7) in rotation and at the same time supports the radial motion of the bushing during expansion.

Abstract: An arm 21 has a shape for grasping a part in a circumferential direction of a tool holder 7. The arm 21 is connected to the tool holder 7 with a bolt 23 inserted into a fixing hole 22 provided in a base side portion of the arm 21. A tapped hole 25 used for exchangeably attaching a cutting tool 24 is formed in a tip side portion of the arm 21. A groove part 26 extending in parallel to an axis of the tool holder 7 is formed in a position close to the base portion of the arm 21. Owing to the groove part 26, the arm 21 works as an elastic hinge when an external force is applied, so as to increase or decrease a radial dimension of the cutting tool 24 while keeping its parallelism to the axis of the tool.

Abstract: A smoothing/polishing tool (10) of the type including a hollow cylindrical body (1), a plurality of expansion sectors (4) for a plurality of abrasives (6) integrally mounted on the external surface of an elastic bushing (7), fit on the expansion sectors (4). The tool (10) includes at least one key (11) insertable in one or more cavities (12) or notches obtained along one or more sectors (4); the key (11) bears one or more teeth (11A) adapted to interfere and be engaged with corresponding one or more holes or slits (13) obtained on the bushing (7); following the rotation of the smoothing/polishing tool (10), the key (11) drives the bushing (7) in rotation and at the same time supports the radial motion of the bushing during expansion.

Abstract: A honing tool comprises a tubular tool body fastened with an end section in a tool shank and a cutting region on an opposite end section with at least one honing-stick accommodating opening. The dimensions of the honing-stick accommodating opening and of the honing stick are matched to one another so that the honing stick is accommodated in a radially movable manner, and essentially free of play in a circumferential direction of the tool body, between boundary surfaces of the honing-stick accommodating opening. A play-compensating device between the honing stick and the honing-stick accommodating opening comprises at least one elastically deformable supporting element which is supported with a pressure force, in a fitted state of the honing stick, on one hand on a side surface of the honing stick and on the other hand on a boundary surface, opposite the side surface, of the honing-stick accommodating opening.

Abstract: A tool holder is provided with a main body, a taper cone, a working portion, a coolant flow passage, and an adjuster. The taper cone includes a taper portion and movable in an axial direction of the main body. The working portion is mounted on an outer peripheral portion of the main body and includes a taper bottom surface which engages with the taper portion. The taper bottom surface is movable in a radial direction of the main body based on a movement of the taper cone in the axial direction. A coolant flows through the coolant flow passage such that a part of the coolant presses and moves the taper cone in the axial direction and another part of the coolant flows out to an outside so as to adjust a pressing force. The adjuster is fitted into a hole penetrating the main body and includes a coolant flow-out hole for adjusting a flow-out of the coolant.

Abstract: The invention relates to a method of coupling a honing tool (2) to a honing spindle (1), a honing spindle suitable therefor, a honing tool suitable therefor and a honing device comprising a honing spindle and a honing tool. According to the invention, a method of coupling a honing tool to a honing spindle is proposed which has the following steps: inserting the honing tool into the honing spindle into a joining position in which a honing-tool centre axis (24) is oriented coaxially to the honing-spindle centre axis (23); locking the honing tool on the honing spindle in the joining position by actuating an adjusting device (5, 6) assigned to the honing spindle. Furthermore, a honing spindle, a honing tool and a honing device which are suitable for carrying out the method are provided.

Abstract: A tool for use in abrading, honing, lapping or otherwise finishing or working the interior surface of a bore, aperture, cylinder or like work piece includes an abrading element dependently supported about a mandrel assembly. The abrading element has a longitudinal slit in order that the abrading element is radially expansible upon the outward application of force from within a longitudinal bore provided therethrough. The mandrel assembly includes a threaded rod upon which is formed a radially expansible arbor, which is formed by application over and about the threaded rod of one or more radially expansible, preferably cylindrical, bushings, which bushings are separated and bounded by a plurality of radially fixed, preferably spherical bushings. The mandrel assembly may also be used as an inside diameter mandrel for supporting a work piece undergoing a machining process.

Abstract: The application describes a honing tool for use with a CNC machine. A fluid actuator provides the mechanism for causing radial adjustment of abrasive elements. The actuator consists of a piston and cylinder assembly mounted within the tool and powered by cooling fluid of the CNC machine. Actuation motion is driven by a helical drive on the piston which imparts rotary motion to a feed rod. Upper and lower feed rod sections are connected through a clutch. Axial movement is imparted to a feed cone by threaded engagement between the feed cone and the lower feed rod section.

Abstract: The application describes a honing tool for use with a CNC machine. A fluid actuator provides the mechanism for causing radial adjustment of abrasive elements. The actuator consists of a piston and cylinder assembly mounted within the tool and powered by the through the tool cooling fluid of the CNC machine. Actuation motion is driven by a helical drive on the piston which imparts rotary motion to a feed rod. Upper and lower feed rod sections are connected through a clutch. Axial movement is imparted to feed cone by threaded engagement between feed cone and lower feed rod.

Abstract: The present invention enables continuous working including working inner diameters with high efficiency. Working members 30, 40 are installed to be able to be attached to and removed from a front end of the tool main body 10 configured with a grinding member 13 on a portion of the axial direction. The working member 30 consists of a grinding reamer, the installation of which enables hole processing followed by inner diameter processing in one continuous operation. The working member 40 consists of a rotating brush, the installation of which enables inner diameter processing followed by inner surface brushing in one continuous operation.

Abstract: The application describes a honing tool for use with a CNC machine. A fluid actuator provides the mechanism for causing radial adjustment of abrasive elements. The actuator consists of a piston and cylinder assembly mounted within the tool and powered by the through the tool cooling fluid of the CNC machine.

Abstract: A reamer with adjustable expansion/contraction and a bore finishing machine comprising the reamer. The reamer has a rotation shaft that is externally operable and a grinding section. The grinding section is cylindrically shaped, and has a plurality of axially-extending slits in its peripheral wall and a tapered inner surface. The rotation shaft is connected via threaded sections to a sliding shaft, which is in turn connected to a diameter expansion member consisting of a tapered cone fitted into the tapered inner surface of the grinding section. When the rotation shaft is operated to rotate, the rotational motion is converted into linear motion of the slide shaft due to a guide pin and a guide hole. The linear motion moves the diameter expansion member back and forth inside the grinding section, thereby contracting/expanding the outer diameter of the grinding section mechanically and precisely. The bore finishing machine has a hollow main rotation spindle, and a rotation spindle inside the same.

Abstract: A device for honing blind bores in parts, a blind bore including a cylindrical bore open at one end and closed adjacent to the opposite end including a honing mandrel for mounting on a honing machine that produces rotation thereof, the mandrel having a cylindrical honing portion adjacent one end which portion and the adjacent portion of the mandrel have spaced axially extending slot therethrough to enable the honing portion of the mandrel to expand and contract in size, the honing portion having a portion adjacent to the end thereof which is somewhat larger than the rest of the honing portion when the honing portion is expanded for honing in the blind hole, the end portions of the mandrel between the spaced slots being elastically expandable from a retracted position which is less than the diameter of the surface to be honed to enable insertion therein to a more expanded condition wherein the diameter of the honing portion at the largest point is the diameter at which the mandrel will hone the blind hole.

Abstract: A reamer with adjustable expansion/contraction and a bore finishing machine comprising the reamer. The reamer has a rotation shaft that is externally operable and a grinding section. The grinding section is cylindrically shaped, and has a plurality of axially-extending slits in its peripheral wall and a tapered inner surface. The rotation shaft is connected via threaded sections to a sliding shaft, which is in turn connected to a diameter expansion member consisting of a tapered cone fitted into the tapered inner surface of the grinding section. When the rotation shaft is operated to rotate, the rotational motion is converted into linear motion of the slide shaft due to a guide pin and a guide hole. The linear motion moves the diameter expansion member back and forth inside the grinding section, thereby contracting/expanding the outer diameter of the grinding section mechanically and precisely. The bore finishing machine has a hollow main rotation spindle, and a rotation spindle inside the same.

Abstract: A finishing machine for internal spline tooth surfaces which comprises a holding device for holding a work having the internal spline tooth surfaces, a grinding stone having a plurality of tooth portions for simultaneously processing a plurality of tooth portions in the work, and a vibrating device for vibrating the grinding stone with a high speed in the axial direction of the work.

Abstract: The invention relates to a honing tool for carrying out honing working of a work with high accuracy and super precision finishing method using the honing tool. The honing tool is mainly constituted by a pilot section (5), a rough grinding section (7), a finish grinding section (10) and a correction section (13). The honing tool is sent at rapid speed while being reciprocated little, and the machining working and correction finishing of the straightness are carried out thereby the honing working is carried out. According to the invention, the machining working efficiency and the working accuracy can be improved, and the honing finishing with high straightness becomes possible.

Abstract: A honing tool or mandrel mountable for rotation on a honing machine comprising a tubular abrasive sleeve member retained coaxially within a modular tubular honing assembly having an opening or passageway extending the entire length therethrough adaptable for insertably receiving an elongated expander member positioned for axial movement therewithin. The modular tubular honing assembly includes a drive member for attaching to a typical honing machine, a cage member adaptable for slidably receiving the abrasive sleeve member, and a retainer member for holding the abrasive sleeve member in operative position within the cage member. The abrasive sleeve member has inner and outer surfaces, the inner surface being conically tapered over its entire length while its outer surface includes a plurality of circumferentially spaced longitudinal projections positioned adjacent longitudinal channels, each projection including a honing surface having abrasive particles located thereon.

Abstract: The invention relates to a honing tool for carrying out honing working of a work with high accuracy and super precision finishing method using the honing tool. The honing tool is mainly constituted by a pilot section (5), a rough grinding section (7), a finish grinding section (10) and a correction section (13). The honing tool is sent at rapid speed while being reciprocated little, and the machining working and correction finishing of the straightness are carried out thereby the honing working is carried out. According to the invention, the machining working efficiency and the working accuracy can be improved, and the honing finishing with high straightness becomes possible.