Abstract

The present invention relates to a hydraulic chuck capable of having a soft jaw formed thereon without having a separate forming ring. An embodiment presents a hydraulic chuck comprising: a master jaw that is slidable radially with respect to a chuck housing; and a soft jaw coupled to the master jaw, wherein the chuck housing has a forming cover rotatably mounted on a central hole thereof, the forming cover being provided with a receiving portion in which the master jaw for clamping operation is accommodated and a contact portion having a larger diameter than the receiving portion, and the master jaw is engaged with the contact portion according to an angle at which the forming cover is rotated, such that a distance for the master jaw to move from an unclamping position to a clamping position is limited.

IPC Classes  ?

• B23B 31/30 - Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
• B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling workSafety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
• B23Q 3/08 - Work-clamping means other than mechanically-actuated

Goods & Services

Clamping tools for holding piece parts during machining; holding devices for machine tools; rotary table for machine tools; scroll chuck; rotary cylinders for lathes [parts of machines]; hydraulic chucks for lathes [parts of machines].

Goods & Services

Clamping tools namely, jigs and vices for holding piece parts during machining; holding devices for machine tools, namely, metal clamps used for holding piece parts on machine tool tables; rotary table dividing head for machine tools; scroll chuck for lathes being parts of machines; rotary cylinders for lathes being parts of machines; power chucks for lathes being parts of machines

Abstract

The present invention relates to a holder for cutting-tool fastening which allows a cutting tool, such as a drill or an end mill, or a side milling cutter, to be fastened to the head part of a machine tool at the time of reaming or milling on a machining center or the like, and allows a driving screw gear and a spindle to be installed inside a holder having a single form, rather than dividing a holder body, so that verticality which is the center of the holder remains unchanged even if the driving screw gear and spindle are replaced as necessary. To this end, the present invention comprises: an integrated holder body (30) which has a tapering shank part (31) formed at the top thereof and an adapter (32) formed at the bottom thereof, the adapter (32) having a tapering part (32a) corresponding to the tapering part (91) of a collet (90), and also has a mounting hole (34) formed vertically so as to connect to the tapering part (32a), a flange part (33) which is in contact with the lower surface of a head part (9) and formed at the boundary between the shank part (31) and the adapter (32), an insertion hole (35) communicating with the mounting hole (34) and being orthogonally formed in the flange part (33), and a rotation-preventing-member fastening hole (38) formed in the adapter (32); a spindle (40) which is embedded via the mounting hole (34) formed in the center of the holder body (30) and has a first male screw part (41) formed at one end thereof and screw-coupled to the inside of the shank part (31), a second male screw part (42) which is formed at the other end thereof and has a screw thread opposite to that of the first male screw part (41), and a driven screw gear (43) integrally formed between the first and second male screw parts (41, 42); a driving screw gear (50) which is installed via the insertion hole (35) of the flange part (33) formed on the holder body (30) and is engaged with the driven screw gear (43) of the spindle (40); a cap (60) which is screw-coupled to the insertion hole (35) formed in the holder body (30), closes the insertion area of the driving screw gear (50), and has a tool insertion hole (61) formed at the center thereof; a slider (70) having a first female screw part (71), which is inserted via the lower part of the adapter (32) and screw-coupled to the second male screw part (42) of the spindle (40), and a long hole (72), which is vertically long and penetratingly formed; and a rotation-preventing member (80) which is installed so as to pass through the long hole (72) of the slider (70) via the rotation-preventing-member fastening hole (38) formed in the adapter (32) of the holder body (30) and restrains the rotation of the slider (70) so as for the slider (70) to ascend and descend, wherein the collet (90) is inserted via the collet storage/maintenance hole (39) of the adapter (32) and screw-coupled to the slider (70).

IPC Classes  ?

• B23Q 3/12 - Devices holding, supporting, or positioning, work or tools, of a kind normally removable from the machine for securing to a spindle in general
• B23C 5/26 - Securing milling-cutters to the driving spindle
• B23C 9/00 - Details or accessories so far as specially adapted to milling machines or cutters

Abstract

The present invention relates to a holder for cutting-tool fastening which allows a cutting tool, such as a drill or an end mill, or a side milling cutter, to be fastened to the head part of a machine tool at the time of reaming or milling on a machining center or the like, and allows a driving screw gear and a spindle to be installed inside a holder having a single form, rather than dividing a holder body, so that verticality which is the center of the holder remains unchanged even if the driving screw gear and spindle are replaced as necessary. To this end, the present invention comprises: an integrated holder body (30) which has a tapering shank part (31) formed at the top thereof and an adapter (32) formed at the bottom thereof, the adapter (32) having a tapering part (32a) corresponding to the tapering part (81) of a collet (80), and also has a mounting hole (34) formed vertically so as to connect to the tapering part (32a), a flange part (33) which is in contact with the lower surface of a head part (9) and formed at the boundary between the shank part (31) and the adapter (32), an insertion hole (35) communicating with the mounting hole (34) and being orthogonally formed in the flange part (33), and a stop-pin fastening hole (38) formed in the flange part (33); a spindle (40) which is embedded via the mounting hole (34) formed in the center of the holder body (30) and has a first male screw part (41) formed at one end thereof and screw-coupled to the collet (80), a driven screw gear (42) formed at the other end thereof, and a ring-shaped recessed groove (43) formed between the first male screw part (41) and the driven screw gear (42); a stop pin (70) which is installed so as to be inserted in the ring-shaped recessed groove (43), formed on the spindle (40), via the stop-pin fastening hole (38) formed in the flange (33) and allows the idling of the spindle (40); a driving screw gear (50) which is installed via the insertion hole (35) of the flange part (33) formed on the holder body (30) and is engaged with the driven screw gear (42) of the spindle (40); and a cap (60) which is screw-coupled to the insertion hole (35) formed in the holder body (30), closes the insertion area of the driving screw gear (50), and has a tool insertion hole (61) formed at the center thereof, wherein the collet (80) is inserted via the collet storage/maintenance hole (39) of the adapter (32) and screw-coupled to the first male screw part (41) of the spindle (40).

IPC Classes  ?

• B23Q 3/12 - Devices holding, supporting, or positioning, work or tools, of a kind normally removable from the machine for securing to a spindle in general
• B23C 5/26 - Securing milling-cutters to the driving spindle
• B23C 9/00 - Details or accessories so far as specially adapted to milling machines or cutters

Abstract

The present invention relates to a one-wedge centering hydraulic chuck, and the objective of the present invention is to minimize the force for clamping and lifting workpieces by jaws while minimizing the stroke of a wedge bar when four jaws are linked by the operation of one wedge plunger so as to accurately center a circular rod, a circular pipe and the different shapes of workpieces having cross sections, which have the shapes of a square, a rectangle, an oval and the like. To this end, the present invention comprises: a chuck housing (10) having a workpiece insertion hole (11) bored through the center of the front surface of a body, an operating space (18) formed at the rear thereof, and four jaw guide grooves (12) formed to intersect with each other; four master jaws (20) slidably assembled in each jaw guide groove (12) of the chuck housing (10); a wedge plunger (30) horizontally moving in the operating space (18) formed at the rear of the chuck housing (10), and having four lever mounting holes (31) and wedge insertion holes (32) provided along the outer periphery thereof; a wedge lever (40) provided in each lever mounting hole (31) of the wedge plunger (30) such that pressing parts (42) at both ends thereof rotate around a lever fixing bolt (50) in the lever mounting hole; the wedge bar (60) slidably mounted in each wedge insertion hole (32) of the wedge plunger (30), and having a lever fitting groove (62) formed at the rear thereof; and a master jaw pressing means for simultaneously moving the master jaws (20) toward the workpiece insertion hole (11) by the backward movement of the wedge plunger (30).

IPC Classes  ?

• B23B 31/02 - Chucks
• B23B 31/103 - Retention by pivotal elements, e.g. catches, pawls
• B23B 31/30 - Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
• B23Q 3/06 - Work-clamping means
• B23B 31/10 - Chucks characterised by the retaining or gripping devices or their immediate operating means

Abstract

The present invention relates to a hydraulic chuck, which includes a chuck housing having a tool insertion hole, a working space, a plurality of jaw guide grooves and a working hole; master jaws respectively and slidably assembled into the jaw guide grooves of the chuck housing, and each having inclined movement grooves, a slide groove, and first and second holding shoulders in a stepped structure; wedge pins coupled with the master jaws for lifting or lowering the master jaws; soft jaws mounted to the front surfaces of the master jaws for directly clamping and fixing a tool; a master ring for controlling clamping positions of the soft jaws; a master ring movement lever rotatively assembled into the chuck housing; wedge plungers coupled with rear parts of the wedge pins by pins; and connection elements for screw-coupling the wedge plungers with a hydraulic pipe to slide the wedge plungers right and left together with a hydraulic device.

IPC Classes  ?

• B23B 31/30 - Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck

Abstract

The present invention is to provide a synchronized clamping chuck for a machine tool, in which a plurality of jaws (30, 40, 50) move at the same time to clamp a work piece with hydraulic pressure increased by hydraulic oil pressurizing (20) in a state that a center of the work piece is positioned at a center of the chuck, and then other jaw clamps the work piece, so that the machining can be done in a state the work piece is clamped rigidly when the centers of the work piece and the chuck are coincident.

IPC Classes  ?

• B23B 31/30 - Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck