662results about "Boring bars" patented technology

PCT No. PCT/SE97/01232 Sec. 371 Date May 14, 1999 Sec. 102(e) Date May 14, 1999 PCT Filed Jul. 7, 1997 PCT Pub. No. WO98/01250 PCT Pub. Date Jan. 15, 1998A boring bar includes a shaft and a head which carries a cutting insert. The head includes a conical protrusion which fits in a correspondingly shaped recess of the shaft and is secured therein by an adhesive joint in order to damp vibrations.

Disclosed herein is the structure of a damper that is capable of improving the degree of freedom in design to optimize the damping characteristics of the damper and is capable of allowing the damper to be easily optimized and manufactured for a wide variety of dynamic stiffness characteristics of a tool body, and a manufacturing method using the same. A plurality of ring-shaped elastic members are disposed at opposite ends of a weight part. The weight part is connected to the tool body via the elastic members. Consequently, the weight part is moved relative to the tool body. The plurality of elastic members are mounted while spacers are disposed between the elastic members, and the spacers are moved with respect to the weight part in the axial direction thereof. A viscous fluid is filled in the region surrounded by the outer circumferential surfaces of the spacers, the elastic members, and the inner surface of a hollow part of the tool body. Consequently, it is possible to damp the relative movement of the weight part with respect to the tool body.

A cutting tool assembly for boring and internal grooving operations includes a tool head having a removably secured cutting insert at a forward insert receiving end and a rear mating end with a male or female type tool holder coupler in the form of an engagement protrusion or cutting holder receiving pocket. The tool head is fixed to a tool holder with a front mating end having a female or male tool head coupler in the form of a tool head receiving pocket or engagement protrusion. Following assembly, at least three abutting wall surfaces and an adjacent support surface of the tool holder coupler are in contact with at least three non-coplanar abutment surfaces and an adjacent supporting surface of the tool head coupler, respectively, and a fastening screw member extends through a through bore in the tool holder coupler engaging a threaded screw bore in the tool head coupler.

A rotatable cutting tool has a shank portion for coupling to a tool driving device and a cutting portion to which is attached at least one support member for retention of a replaceable cutting element. The support member is so arranged to permit displacement of at least the portion thereof retaining the cutting element whereby the position of the cutting element relative to the body of the cutting tool may be changed by such displacement. A totally enclosed hydraulic force multiplier is mounted within an internal cavity of the cutting tool. The force multiplier is responsive to a control force to effect the displacement of the support member, the control force advantageously supplied by application of pneumatic pressure.

A drill for working in metallic materials includes a tool body having located in its front end at least one cutting insert, wherein the tool body is provided with one or several damping elements mounted such that during machining, a relative movement (i.e., sliding and/or deformation) of the tool body and the damping element is allowed to occur.

The invention discloses a built-in dynamical double-damping boring bar for processing deep holes, which mainly comprises a bar body, an elastic locating piece and cylindrical damping blocks, wherein, a cylindrical hole cavity is designed on one end of the bar body provided with a tool bit, the two cylindrical damping blocks are axially arranged, and each cylindrical damping block is arranged at the center of the cylindrical hole cavity of the bar body through the elastic locating piece by two ends. Compared with the single-damping boring bar in the prior art, the built-in double-damping boring bar of the invention greatly improves the vibration damping property to achieve good vibration damping property, thus greatly improving boring processing conditions and enhancing the machining precision of workpieces.

An object is to provide a vibration suppressing cutting tool which is inexpensive and can damp chattering extremely effectively, and which is simple in structure and is applicable to a wide variety of machining diameters and cutting conditions.

The shank 2 of the holder 1 is formed with a pocket 4. In the pocket 4, a vibration suppressing piece 5 is received so as to be movable relative to the holder 1 and not protrudable from the pocket 4. Under kinetic energy from the holder during cutting, the vibration suppressing piece 5 alternately knocks against a pair of opposed inner wall surfaces 4a and 4b of the pocket along its surface, along a plurality of lines or on a plurality of points when the holder vibrates during cutting, thereby damping vibrations of the holder.

A vibration damping tool having the following structure is provided. In the vibration damping tool, a hollow portion is formed in the interior of the distal end portion of a tool body and one end of a weight member is connected to the inner wall surface of the distal end side of this hollow portion. A gap created between the outer peripheral surface of the weight member and the inner wall surface of the hollow portion is filled with a visco-elastic body. The one end of the weight member is formed as a narrow diameter shaft portion. The tool body can be divided into two and freely removed from and reattached at a dividing surface located on the base end side of the hollow portion. A hole portion is formed inside the other end of the weight member by hollowing out the interior thereof. Chatter vibration is thus absorbed using a simple structure without there being any effects from heat generated during cutting processing.

The invention provides an intelligent vibration reduction boring bar and a vibration reduction control method and belongs to the field of machining. The problems that an existing passive vibration reduction boring bar has no automatic vibration reduction adjusting function, and an active vibration reduction boring bar system is large and difficult to maintain and repair are solve. According to the boring bar, a three-axis accelerator sensor, multiple cantilever vibration absorption units and a sliding base are arranged in a cavity at the front end of a cutter bar. Each cantilever vibration absorption unit comprises a mass block and a cantilever beam, wherein the two ends of the cantilever beam are fixed to the mass block and the rear end face of the cavity respectively. A data processing unit calculates acceleration data of the pointed end of a blade according to acceleration data measured by the sensor, the sliding base is controlled by a transmission unit to slide in the cavity, and accordingly the overhanging amount of the cantilever beams is changed. The method includes the steps that the data processing unit controls the sliding base to slide from one end of each cantilever beam to the other end, in the process, the data processing unit determines the slider optimal position corresponding to the minimum acceleration data at the pointed end of the blade, and a slider is controlled to slide to the position. The boring bar is used for deep hole boring.

A tool for removing material or machining the end of a pipe. The tool having at least one and preferably two blade plates. Each blade plate includes a first cutter for machining an end surface of the pipe, a second cutter adjacent the first cutter for producing an internal chamfer in the pipe end and a third cutter adjacent the first cutter positioned for producing an external chamfer adjoining the end surface of the pipe end. Devices guide and permit movement of the cutters either radially or axially. The shaping of the cutter is disclosed.

The invention relates to an active vibration reduction boring rod based on an electromagnetic damper, and belongs to the field of machining. The active vibration reduction boring rod based on the electromagnetic damper solves that problem that an existing active vibration reduction boring rod based on a damper is prone to failure, complex in structure and large in manufacturing difficulty. The active vibration reduction boring rod based on the electromagnetic damper comprises a rod body, the electromagnetic damper, a three-axis acceleration sensor and a control system, wherein a tool bit is arranged at the front end of the rod body, and the tool bit is used for clamping a blade; the electromagnetic damper is arranged inside the rod body. When the vibration reduction boring rod is used forboring, the three-axis acceleration sensor is used for measuring acceleration data of the rod body and sending the acceleration data to the control system, and the control system is used for adjustingthe damping coefficient of the electromagnetic damper until the acceleration data that the control system receives reaches the minimum. The active vibration reduction boring rod based on the electromagnetic damper is suitable for fine boring.

The present invention relates to an improved apparatus and method for machining pipe. In one aspect, the multifunction apparatus is an improved device for machining the inside diameter and outside diameter of pipe, as well as shaping the wall of pipe. In another aspect, the invention is an improved method for machining pipe. In particular, the method employs a one-to-one communication ratio between the geared components that control the position of the cutting tool in order to eliminate rounding errors associated with conventional gearing systems.

A cutting tool with a cutting insert and a pivotable screw and nut combination for holding the cutting insert. The cutting tool also has a feed mechanism to adjust the position of at least one cutting edge of the cutting insert in the cutting tool.

The invention relates to a device for damping vibrations and/or controlling the flexion of an object (2, 10) in machining, said device comprising at least one force exchange device (7) which could be a force applying device or a damping device. A such force applying device (7) is for applying a force having a force component directed at right angles to the surface of the object and/or for applying a moment to the object (2, 10). A damping device (7) of this type is for absorbing vibrations from the object (2, 10) and is adapted to absorb a force component directed at right angles to the surface of the object or to absorb a moment from the object.

The invention discloses an inner chambering cutter based on the continuous automatic rear chip removal of a blind deep hole, aiming to provide a special inner chambering cutter which is more favourable for processing special parts with irregular and complex curve, such as a conical surface, a sphere, a cylindrical surface and the like in the blind deep hole, the middle of each special part is big, and two ends of the part are small. The inner chambering cutter comprises a push-pull mechanism, a movable tool rest mechanism, an end cover and a cutter body, wherein the push-pull mechanism is formed by connecting a push-pull rod and a guide rail via a taper pin; a diamond coating machine clip blade is fixed on a small boring cutter body by a special sunk screw to form a movable tool rest mechanism; when the push-pull mechanism moves left and right, slope movement is carried out on the tool rest mechanism to realize the purpose that the tool rest mechanism radially moves; and the end cover is fixed on the front end of the boring cutter support body by two bolts to prevent a cutting fluid and cuttings from flowing into the inner cavity of a boring rod. The cutter body is composed of the boring cutter support body, a middle boring cutter body and a boring cutter body. The chip removal mode disclosed by the invention is rear chip removal in the external chip removal.