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US-12623269-B2 - Fixing device for bending processing of shaft- shaped member

US12623269B2US 12623269 B2US12623269 B2US 12623269B2US-12623269-B2

Abstract

The present invention relates to a fixing device for bending processing of a shaft-shaped member, including a panel support member capable of sliding on an upper portion of a sliding rail, a fixed panel including a first opening having a semicircular shape, a tilting panel including a second opening having a semicircular shape symmetrical to the first opening and capable of tilting about a tilting shaft, a rotary plate having first and second rotary plates having semicircular cross-sectional shapes that are detachably coupled to each other and inserted to be rotatable inside the first and second openings, a drive gear that engages with a driven gear on an outer peripheral surface of the rotary plate, a first actuator that provides a rotational driving force to the drive gear, a second actuator mounted on the tilting panel to tilt the tilting panel, and a third actuator that slides the panel support member.

Inventors

  • Chan Gi Jung

Assignees

  • DAEWON APPLIED ENG. CO.

Dates

Publication Date
20260512
Application Date
20250121
Priority Date
20240702

Claims (11)

  1. 1 . A fixing device for bending processing of a shaft-shaped member, comprising: a sliding rail ( 100 ) disposed in a direction perpendicular to an axial direction of a workpiece ( 1 ) having a shaft shape; a panel support member ( 110 ) disposed on an upper side of the sliding rail ( 100 ) to be slidable in a longitudinal direction of the sliding rail ( 100 ); a fixed panel ( 200 ) including a pair of plate-shaped members fixedly disposed on one side of the panel support member ( 110 ) in the longitudinal direction of the sliding rail ( 100 ) to be spaced a certain interval apart in the axial direction of the workpiece ( 1 ), and a first opening ( 201 ) formed so that an edge facing a tilting panel ( 300 ) is recessed to form a semicircle; a tilting shaft ( 111 ) mounted parallel to the axial direction of the workpiece ( 1 ) at a center of the panel support member ( 110 ); the tilting panel ( 300 ) including a pair of plate-shaped members disposed on the other side of the panel support member ( 110 ) in the longitudinal direction of the sliding rail ( 100 ) to be spaced a predetermined interval apart in the axial direction of the workpiece ( 1 ), including a second opening ( 301 ) formed to be recessed in a semicircular shape in which an edge facing the fixed panel ( 200 ) is symmetrical to the first opening ( 201 ), and having a lower end toward the second opening ( 301 ) connected to be tiltable around the tilting shaft ( 111 ); a rotary plate ( 400 ) having a circular disk shape formed by detachably coupling first and second rotary plates ( 401 and 402 ) of a semicircular cross-sectional shape to each other to be inserted to be rotatable in the axial direction of the workpiece ( 1 ) inside the circular openings formed by the first and second openings ( 201 , 301 ), having a driven gear ( 410 ) formed on an outer peripheral surface thereof, and having a clamp ( 420 ) formed to fix an outer peripheral surface of the workpiece ( 1 ) to a semicircular central edge of each of the first and second rotary plates ( 401 and 402 ); a drive gear ( 430 ) configured to engage with the driven gear ( 410 ) on the outer peripheral surface of the rotary plate ( 400 ); a first actuator ( 501 ) configured to provide a rotational driving force to the drive gear ( 430 ) to rotate the workpiece ( 1 ) fixed to the rotary plate ( 400 ) and the clamp ( 420 ); a second actuator ( 502 ) mounted on the tilting panel ( 300 ) and configured to tilt the tilting panel ( 300 ) around the tilting shaft ( 111 ) to open or close a boundary portion between the first and second openings ( 201 and 301 ); and a third actuator ( 503 ) mounted at an end of the panel support member ( 110 ) and configured to cause the panel support member ( 110 ) to slide in the longitudinal direction of the sliding rail ( 100 ).
  2. 2 . The fixing device of claim 1 , wherein the bending processing is performed when the workpiece ( 1 ) fixed to the clamp ( 420 ) moves in the longitudinal direction of the sliding rail ( 100 ) by operating the third actuator ( 503 ) or rotates and moves at the same time by operating the first and third actuators ( 501 and 503 ) in a state where the boundary portion between the first and second openings ( 201 and 301 ) is closed, the workpiece ( 1 ) is fixedly mounted on or separated from the clamp ( 240 ) in a state where the boundary portion between the first and second openings ( 201 and 301 ) is open, and an operation of opening or closing the boundary portion between the first and second openings ( 201 and 301 ) is performed by operating the second actuator ( 502 ) in a state where the rotary plate ( 400 ) is rotated so that a connecting portion boundary between the fixed panel ( 200 ) and the tilting panel ( 300 ) and a connecting portion boundary between the first and second rotary plates ( 401 and 402 ) are disposed on the same plane by operating the first actuator ( 501 ).
  3. 3 . The fixing device of claim 1 , wherein, in a state where the boundary portion between the first and second openings ( 201 and 301 ) is closed, a connecting portion boundary between the fixed panel ( 200 ) and the tilting panel ( 300 ) is inclined so that an interval from the tilting shaft ( 111 ) in the longitudinal direction of the sliding rail ( 100 ) increases toward an upper side from a lower side, and a lower edge of the tilting panel ( 300 ) forms an inclined surface in which an interval from an upper surface of the panel support member ( 110 ) increases as the lower edge is further away from the tilting shaft ( 111 ).
  4. 4 . The fixing device of claim 1 , wherein the clamp ( 420 ) includes: a sliding groove ( 421 ) formed at each of the semicircular central edges of the first and second rotary plates ( 401 and 402 ) and formed as a groove formed to be recessed into the outer peripheral surface of the rotary plate ( 400 ); a pair of sliding bars ( 422 ) inserted into the sliding grooves ( 421 ) of the first and second rotary plates ( 401 and 402 ) to slide along the sliding grooves ( 421 ), and having a grip portion ( 423 ) formed at ends of central portions of the first and second rotary plates ( 401 and 402 ) to fix the workpiece ( 1 ); and an elastic member ( 424 ) having both ends fixed to an inner surface of each of the sliding grooves ( 421 ) of the first and second rotary plates ( 401 and 402 ) facing each other and an end of the sliding bar ( 422 ), and configured to biasedly move each sliding bar ( 422 ) toward the central portions of the first and second rotary plates ( 401 and 402 ).
  5. 5 . The fixing device of claim 1 , wherein a rotation guide groove ( 202 ) recessed to form a circular ring shape in a state where the first and second openings ( 201 and 301 ) are closed is formed in one or both of inner surfaces facing each other between the fixed panel ( 200 ) and the tilting panel ( 300 ), and a rotation guide rim ( 403 ) that protrudes to form a semicircular ring shape and is rotatably inserted into the rotation guide groove ( 202 ) is formed on each of surfaces of the first and second rotary plates ( 401 and 402 ) facing the rotation guide groove ( 202 ).
  6. 6 . The fixing device of claim 1 , wherein an upper end of the second actuator ( 502 ) is rotatably connected to a first connecting shaft ( 302 ) mounted on an edge of the tilting panel ( 300 ) facing the third actuator ( 503 ), and a lower end of the second actuator ( 502 ) is rotatably connected to a second connecting shaft ( 112 ) mounted on the panel support member ( 110 ) to be disposed between the tilting shaft ( 111 ) and the third actuator ( 503 ).
  7. 7 . The fixing device of claim 1 , wherein a plurality of sliders ( 120 ) coupled to be slidable on the sliding rail ( 100 ) are fixedly mounted on a lower surface of the panel support member ( 110 ).
  8. 8 . The fixing device of claim 4 , wherein the sliding grooves ( 421 ) of the first and second rotary plates ( 401 and 402 ) form a concave groove shape that is open in the axial direction of the workpiece ( 1 ), an elastic member fixing groove ( 425 ) in the shape of a concave groove into which an end of the elastic member ( 424 ) is inserted and fixed is formed in surfaces of ends of each sliding bar ( 422 ) and the opposing sliding groove ( 421 ) facing each other, and a guide panel ( 426 ) configured to close an open portion of the sliding groove ( 421 ) and guide a moving direction of the sliding bar ( 422 ) is mounted on each of surfaces of the first and second rotary plates ( 401 and 402 ) in the axial direction of the workpiece ( 1 ).
  9. 9 . The fixing device of claim 5 , wherein a number of pulleys ( 203 ) are rotatably mounted on an outer side of a surface forming the rotation guide groove ( 202 ) of the fixed panel ( 200 ) or the tilting panel ( 300 ) to be spaced a certain interval from a center of the rotation guide groove ( 202 ) and radially disposed, and an outer peripheral surface of each pulley ( 203 ) supports an outer peripheral surface of the rotation guide rim ( 403 ).
  10. 10 . The fixing device of claim 7 , wherein stoppers ( 130 ) for limiting a movement distance of the panel support member ( 110 ) are formed at both ends of the sliding rail ( 100 ) in the longitudinal direction.
  11. 11 . The fixing device of claim 8 , wherein a clamp stopper ( 427 ) is formed at an end of a formation portion of the elastic member fixing groove ( 425 ) of the sliding bar ( 422 ) so that a portion of a surface of the sliding bar ( 422 ) protrudes in the axial direction of the workpiece ( 1 ), and a catch occurs between the clamp stopper ( 427 ) and the guide panel ( 426 ) when the elastic member ( 424 ) is stretched by elastic restoration.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to and the benefit of Korean Patent Application No. 10-2024-0086728, filed on Jul. 2, 2024, the disclosure of which is incorporated herein by reference in its entirety. BACKGROUND 1. Field of the Invention The present invention relates to a device for fixing a member for processing a shaft-shaped member, and more specifically, to a fixing device for bending processing of a shaft-shaped member, including a panel support member capable of sliding on an upper portion of a sliding rail, a fixed panel including a first opening having a semicircular shape, a tilting panel including a second opening having a semicircular shape symmetrical to the first opening and capable of tilting with respect to a tilting shaft, a rotary plate having first and second rotary plates having a semicircular cross-sectional shape that are detachably coupled to each other and inserted to be rotatable inside the first and second openings, a drive gear that engages with a driven gear on an outer peripheral surface of the rotary plate, a first actuator that provides a rotational driving force to the drive gear, a second actuator mounted on the tilting panel to tilt the tilting panel, and a third actuator that slides the panel support member. 2. Discussion of Related Art A bending processing device for processing a finished product in the shape of a shaft in which a bending portion is formed includes a guide in the shape of a disk and a jig positioned opposite an outer peripheral surface of the guide, and bending processing is performed by disposing one side of a workpiece made of a rod or pipe having a circular cross-section between the guide and the jig, and then pressing the other side of the workpiece toward the jig while changing a jig disposition position according to a shape of a bending portion or a bending angle of the finished shaft-shaped product. During the bending processing of the workpiece, one side of the workpiece is fixed by a fixing device, and when the workpiece is not properly fixed by the fixing device, a fixing point of the workpiece may move in an axial direction or a direction in which bending occurs due to an external force to cause an error in a position of the bending portion or the angle at which the bending portion is bent, and thus the shape precision of the finished shaft-shaped product may be significantly lowered. As the fixing device for firmly fixing and supporting the workpiece during the bending processing, in a bending processing device for a shaft-shaped member of Korean Patent Registration No. 10-2642618 (registered on Feb. 27, 2024), a fixing device including a jig fixing block installed vertically upward, a chucking jig transfer unit that adjusts a chucking jig position in a transverse direction perpendicular to a longitudinal direction of the workpiece, a chucking jig mounted on the chucking jig transfer unit, and a chucking jig rotation unit that axially rotates the workpiece fixed to the chucking jig is presented. The chucking jig rotation unit of the fixing device is formed as a disk-shaped member between a pair of chucking panels having a circular opening formed toward one side of a central portion, a chucking disk having a rotation angle controlled by a member rotation motor is rotatably mounted thereon, and the chucking disk is configured to be equipped with a pair of grip portions for fixing the sides of the workpiece and actuators for controlling gripping or releasing of the workpiece of each grip portion. Accordingly, in a state where the workpiece is fixed through the grip portions, the rotation angle of the chucking disk is controlled according to the shape of the bending portion of the shaft-shaped member to rotate the workpiece in the axial direction, thereby changing the direction of the bending processing of the workpiece. In the configuration of the fixing device capable of controlling the direction of bending of the workpiece through the chucking disk, a grip state of the workpiece through the grip portion may not be released for changing the direction of bending processing of the workpiece, thereby significantly improving the speed of performing bending processing of the workpiece. However, a grip structure of the fixing device that controls the gripping or releasing of the workpiece through the actuator as described above increases an axial thickness of the workpiece of the fixing device as the actuators for controlling the grip portion, which are made of an air cylinder or a hydraulic cylinder, are added. Accordingly, as a non-processable region in which bending processing is not able to be performed increases in the axial direction of the workpiece while being fixed to the fixing device, a distance in which the guide and jig of the bending device are allowed to approach the fixing device is limited, so that a minimum bendable length of the workpiece may increase, and the shape or size of the finished shaf