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11602results about "Work holders" patented technology

Flexible multipoint tool set for positioning and supporting thin-walled curved surface parts

The invention discloses a flexible multipoint tool set for positioning and supporting thin-walled curved surface parts, which comprises an operating platform and at least three supporting/fixing units, wherein the supporting/fixing units are all arranged on the operating platform, and each supporting/fixing unit comprises a spherical hinge side draught vacuum chuck, a first hoisting assembly and a fixed base, the spherical hinge side draught vacuum chuck is arranged at the upper part of the first hoisting assembly, and the lower part of the first hoisting assembly is arranged on the fixed base; the fixed base of each supporting/fixing unit is provided with a first electromagnet, and the first electromagnet is in magnetic suction with the upper surface of the operating platform; and the operating platform is also provided with at least two positioning units, each positioning unit comprises a positioning pin, a second hoisting assembly and a positioning base, the positioning pin is arranged at the upper end part of the second hoisting assembly, the lower end part of the second hoisting assembly is arranged on the positioning base, and the positioning base is connected with the operating platform. The flexible multipoint tool set disclosed by the invention not only can accurately position thin-walled curved surface parts, but also can conveniently move above the operating platform and adjust the distance between every two supporting/fixing units.
Owner:HOHAI UNIV CHANGZHOU

Pneumatically actuated magnetic workpiece holder

A pneumatically actuated magnetic workpiece holder comprising a housing having a contact surface for contacting a workpiece to be held, and a magnet assembly translationally disposed in the housing, the magnet assembly comprising a plurality of permanent magnets arranged so that adjacent magnets are of opposite polarities. The housing is adapted for fluid communication with a pneumatic supply. The magnet assembly is biased towards an operative position, according to which the magnet assembly is sufficiently near the contact surface to exert on a workpiece an attractive force sufficient for holding the workpiece in contact with the workpiece holder, and is translationally positionable by pneumatic pressure towards an inoperative position, according to which the magnet assembly is sufficiently distant from the contact surface so as to be unable to exert on the workpiece an attractive force sufficient for holding the workpiece in contact with the workpiece holder. The invention is adapted for replacing suction-cup workpiece holders in conventional vacuum lifting devices, and a method of utilizing the present invention in this fashion is taught to comprise providing the workpiece holder with a coupling complimentary to the coupling for such conventional suction-cup workpiece holders, so that the magnetic workpiece holder may be substituted for the conventional suction-cup holder in the vacuum lifting device. According to this method, the vacuum supply of the conventional vacuum lifting device is adapted to provide such positive air pressure for employing the magnetic workpiece holder of this invention.
Owner:INDAL MAGNETICS

Combined type thin-gauge skin moulding surface trimming cut flexibility multi-supporting equipment

The invention relates to a combination flexible multipoint support device with skin and trimming, which consists of a plurality of positioning plates and a plurality of adjusting components; the positioning plates is flat T-shape and a threaded hole and a matching surface are arranged on the positioning plates; the adjusting components consist of a basioccipital and a nail height adjusting unit; the adjusting components are put in parallel in an X direction and the interval between centers is fixed; the positioning plates are divided into two symmetrical rows in a Y direction; each positioning plate is connected with the same end of two adjacent adjusting components; the basioccipital shapes like a rectangular and locating holes, a threaded hole and a matching surface are arranged on the basioccipital; the locating holes are evenly distributed in a line on the basioccipital and the nail height adjusting unit is fixed in the locating holes; the nail height adjusting unit consists of a large double-screw bolt, a bolt, a locknut, a rotary nail, a replaceable nail sleeve, a joint cylinder, a universal device, a vacuum generator and a vacuum chuck. The device of the invention realizes flexible holding, reduces special clamping devices and frocks and has remarkable economic and time benefits.
Owner:BEIHANG UNIV

Magnet Arrays

Method and device for self-regulated flux transfer from a source of magnetic energy into one or more ferromagnetic work pieces, wherein a plurality of magnets, each having at least one N-S pole pair defining a magnetization axis, are disposed in a medium having a first relative permeability, the magnets being arranged in an array in which gaps of predetermined distance are maintained between neighboring magnets in the array and in which the magnetization axes of the magnets are oriented such that immediately neighboring magnets face one another with opposite polarities, such arrangement representing a magnetic tank circuit in which internal flux paths through the medium exist between neighboring magnets and magnetic flux access portals are defined between oppositely polarized pole pieces of such neighboring magnets, and wherein at least one working circuit is created which has a reluctance that is lower than that of the magnetic tank circuit by bringing one or more of the magnetic flux access portals into close vicinity to or contact with a surface of a ferromagnetic body having a second relative permeability that is higher than the first relative permeability, whereby a limit of effective flux transfer from the magnetic tank circuit into the working circuit will be reached when the work piece approaches magnetic saturation and the reluctance of the work circuit substantially equals the reluctance of the tank circuit.
Owner:MAGSWITCH TECH WORLDWIDE PTY LTD

Positioning compaction device, compaction device and tool for auxiliary machining of chassis of motor train

The invention provides a positioning compaction device, a compaction device and a tool for the auxiliary machining of chassis of motor trains. The positioning compaction device comprises a beam, two support frames, two rotary vertical compaction structures, a side positioning structure, a lateral butting structure and two adjustable intermediate support structures, wherein the two support frames are slidably arranged on both sides of the upper surface of the beam respectively; the two rotary vertical compaction structures are arranged on the tops of the two support frames respectively; the side positioning structure is arranged on the lateral part of one support frame in the two support frames; the lateral butting structure is arranged on the lateral part of the other support frame in thetwo support frames; and the two adjustable intermediate support structures are arranged on the upper surface of the beam and are positioned between the two support frames. The positioning compaction device realizes the modular design of the tool for the auxiliary machining of the chassis of the motor trains and solves the technical problems of large volume and inconvenient carrying and movement of a tool structure for the auxiliary machining of the chassis of the motor trains and incapability of auxiliary machining of the chassis of the motor trains with different types due to low adjustability.
Owner:CRRC TANGSHAN CO LTD

External-embrace type clamp

The invention provides an external-embrace type clamp. The external-embrace type clamp comprises a base, a cover body and a rotating disk, wherein the cover body is arranged on the base in a stacking mode and fixedly connected with the base, the rotating disk is clamped between the base and the cover body, a convex shaft is arranged in the center of the base, a clamping hole used for containing a part to be clamped is formed in the center of the convex shaft, the convex shaft is sleeved with the rotating disk, the rotating disk can rotate around the convex shaft, a through hole which can be used for a part to be clamped in the clamping hole to extend out is correspondingly formed in the center of the cover body, a plurality of clamping blocks are evenly arranged on the upper surface of the rotating disk, can rotate reversely along with the rotating disk to close up towards the center of the rotating disk so as to tightly clamp the part to be clamped, and rotate forwardly along with the rotating disk to slide to disperse away from the center of the rotating disk so as to release the part to be clamped, and sliding chutes used for the clamping blocks to slide are correspondingly formed in the cover body. The clamping blocks are provided with sliding shafts, slot holes used for the sliding shafts to slide respectively are evenly formed in the circumference of the surface of the rotating disk in an array mode, and the distance between one end of each slot hole to the center of the rotating disk is shorter than the distance between the other end of the slot hole to the center of the rotating disk. The external-embrace type clamp is small in number of parts, simple in structure, convenient to operate, accurate in location and low in manufacturing cost.
Owner:HANS LASER TECH IND GRP CO LTD
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