Fixing device for bending a shaft-shaped member

Abstract

A fixing device for bending a shaft-like member is provided. [Solution] A fixing device for bending a shaft-shaped member, comprising: a panel support member that can slide on the top of a sliding rail; a fixed panel including a first opening having a semicircular shape; a tilting panel that includes a second opening having a semicircular shape symmetrical to the first opening and can tilt around a tilting axis; first and second rotating plates with semicircular cross-sections that are separably connected to each other and are rotatably inserted inside the first and second openings; a driving gear that meshes with a driven gear on the outer surface of the rotating plate; a first actuator that provides rotational driving force to the driving gear; a second actuator that is mounted on the tilting panel and tilts the tilting panel; and a third actuator that slides and moves the panel support member.

Description

[Technical Field]

[0001] The present invention relates to an apparatus for fixing a shaft-shaped member for processing the member, and more particularly to a fixing apparatus for bending a shaft-shaped member, the fixing apparatus comprising: a panel support member slidably mounted on an upper portion of a sliding rail; a fixing panel having a first opening having a semicircular shape; a tilting panel having a second opening having a semicircular shape symmetrical to the first opening and capable of tilting around a tilting axis; first and second rotating plates having semicircular cross sections detachably coupled to each other and rotatably inserted within the first and second openings; a driving gear configured to mesh with a driven gear on the outer periphery of the rotating plate; a first actuator configured to provide a rotational driving force to the driving gear; a second actuator mounted on the tilting panel and configured to tilt the tilting panel; and a third actuator configured to slide and move the panel support member. [Background technology]

[0002] A bending device for processing a shaft-shaped finished product with a bent portion formed therein is composed of a disk-shaped guide and a jig arranged opposite the outer surface of the guide. One side of the workpiece, which is a rod or pipe with a circular cross section, is placed between the guide and the jig, and then the bending process is performed by pressing the other side of the workpiece toward the jig while changing the jig placement position depending on the shape of the bent portion of the shaft-shaped finished product and the bending angle.

[0003] During the bending process of a workpiece, one side of the workpiece is fixed by a fixing device. If the fixing device is not firmly fixed to the workpiece, an external force may cause the fixing point of the workpiece to move along the axial direction or the bending direction, resulting in errors in the position of the bent part and the bending angle, and the accuracy of the shape of the finished shaft-shaped product may be significantly reduced.

[0004] As a fixing device for firmly fixing and supporting the workpiece during bending, Korean Patent Publication No. 10-2642618 (registered on February 27, 2024) proposes a shaft-shaped member bending device that includes a fixing device that is installed facing vertically upward, a chucking jig transfer unit that adjusts the position of the chucking jig in the horizontal direction perpendicular to the longitudinal direction of the workpiece, a chucking jig attached to the chucking jig transfer unit, and a chucking jig rotation unit that rotates the workpiece fixed to the chucking jig in the axial direction.

[0005] The chucking jig rotation unit of the fixing device is configured such that a chucking disk, which is a disk-shaped member and whose rotation angle is controlled by a member rotation motor, is rotatably mounted between a pair of chucking panels each having a circular opening formed on one side of the center, and the chucking disk is equipped with a pair of gripping portions for fixing the sides of the workpiece and an actuator for controlling each gripping portion to grip or release the workpiece.

[0006] This allows the bending direction of the workpiece to be changed by fixing the workpiece through the grip portion and controlling the rotation angle of the chucking disk using the shape of the bending portion of the shaft-shaped member to rotate the workpiece in the axial direction.

[0007] The configuration of the fixing device, which can control the bending direction of the workpiece via the chucking disk, enables the speed at which the bending process of the workpiece is carried out to be significantly improved by not releasing the grip of the workpiece via the gripping section in order to change the bending direction of the workpiece.

[0008] However, the grip structure of the fixing device, which controls the gripping or release of the workpiece via an actuator as described above, increases the axial thickness of the workpiece of the fixing device as more gripping section control actuators consisting of air cylinders or hydraulic cylinders are added.

[0009] As a result, as the unworkable area where bending cannot be performed while fixed to the fixing device increases along the axial direction of the workpiece, the distance that the guides and jigs of the bending device can approach the fixing device is limited, the minimum bendable length of the workpiece can become longer, and the shape and specifications of the shaft-shaped finished product that can be bent can be limited.

[0010] In addition, in the above-described fixing device grip structure, an actuator must be operated to control the grip state of the gripping portion in order to grip and fix the workpiece to perform bending, or to release the grip to separate the workpiece from the fixing device after bending has been completed.

[0011] At this time, the actuator drive must be precisely controlled to prevent surface damage or deformation of the fixed part of the workpiece due to excessive gripping force, or to prevent the fixed point of the workpiece from moving due to insufficient gripping force. However, there is a problem that the actuator drive control process increases the operating time required for the gripping process of the workpiece, thereby reducing the bending work speed. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Korean Patent No. 10-2642618 Summary of the Invention [Problem to be solved by the invention]

[0013] The present invention aims to provide a fixing device structure that reduces the axial thickness of the workpiece in the fixing device and shortens the maximum distance that the guides and jigs of the bending device can move toward the fixing device, thereby lowering the limit on the minimum bendable length of the workpiece and easing the shape and standard restrictions of the shaft-shaped finished product that can be bent.

[0014] SUMMARY OF THE INVENTION An object of the present invention is to provide a clamping device structure that can reduce the time required for the clamping device to grip and release the workpiece, thereby improving the efficiency of bending operations. [Means for solving the problem]

[0015] The fixing device for bending a shaft-shaped member according to the present invention comprises: a sliding rail arranged along a direction perpendicular to the axial direction of a shaft-shaped workpiece; a panel support member arranged on the sliding rail and slidable along the longitudinal direction of the sliding rail; a fixed panel including a pair of plate-shaped members fixedly arranged on one side of the panel support member at a predetermined distance along the axial direction of the workpiece, and a first opening having a recessed, semicircular edge facing the other end of the panel support member; a tilting shaft attached to the center of the panel support member so as to be parallel to the axial direction of the workpiece; and a tilting shaft including a pair of plate-shaped members arranged on the other side of the panel support member at a predetermined distance along the axial direction of the workpiece, and a second opening having a recessed, semicircular edge facing the one end of the panel support member that is symmetrical to the first opening, the lower end of which is connected so as to be tiltable about the tilting shaft. a tilting panel; a rotating plate having a semicircular cross-sectional shape, first and second rotating plates detachably connected to each other to form a circular disk, inserted into a circular opening formed by the first and second openings so as to be rotatable about the axial direction of the workpiece, with a driven gear formed on the outer circumferential surface and a clamp formed on the edge of the semicircular center of each of the first and second rotating plates for fixing the outer circumferential surface of the workpiece; a drive gear configured to mesh with the driven gear on the outer circumferential surface of the rotating plate; a first actuator configured to provide a rotational driving force to the drive gear to rotate the workpiece fixed to the rotating plate and the clamp; a second actuator mounted on the tilting panel and configured to tilt the tilting panel about the tilting axis and open or close the boundary between the first and second openings; and a third actuator mounted on an end of the panel support member and configured to slide the panel support member along the longitudinal direction of the sliding rail.

[0016] According to an embodiment of the present invention, bending is performed when the workpiece fixed to the clamp moves along the longitudinal direction of the sliding rail by operation of the third actuator when the boundary between the first opening and the second opening is closed, or when the workpiece fixed to the clamp rotates and moves simultaneously by operation of the first actuator and the third actuator; when the boundary between the first opening and the second opening is opened, the workpiece is fixed to or detached from the clamp; and when the rotary plate is rotated by operation of the first actuator so that the boundary of the connection between the fixed panel and the tilting panel and the boundary of the connection between the first rotating plate and the second rotating plate are positioned on the same plane, the opening or closing operation of the boundary between the first opening and the second opening is performed by operation of the second actuator.

[0017] According to an embodiment of the present invention, when the boundary between the first opening and the second opening is in a closed state, the boundary of the connection between the fixed panel and the tilting panel is inclined so that the distance from the tilting axis along the longitudinal direction of the sliding rail increases as it moves from the bottom to the top, and the edge of the lower end of the tilting panel forms an inclined slope whose distance from the upper surface of the panel support member increases as it moves away from the tilting axis.

[0018] According to an embodiment of the present invention, the clamp includes: sliding grooves formed on the semicircular central edges of each of the first and second rotary plates, each groove being a recessed groove formed toward the outer periphery of the rotary plates; a pair of sliding bars inserted into and sliding along the sliding grooves of the first and second rotary plates, each having gripping portions formed at the ends of the central portions of the first and second rotary plates for fixing the workpiece; and elastic members whose both ends are fixed to the inner surfaces of the opposing sliding grooves of the first and second rotary plates and the ends of the sliding bars, respectively, and configured to deflect and move the sliding bars toward the central portions of the first and second rotary plates.

[0019] According to an embodiment of the present invention, a rotation guide groove is formed on one or both sides of the opposing inner surfaces between the fixed panel and the tilting panel, which is recessed to form a circular ring shape when the first opening and the second opening are closed, and a rotation guide rim is formed on each surface of the first rotating plate and the second rotating plate facing the rotation guide groove, which protrudes to form a semicircular ring shape and is rotatably inserted into the rotation guide groove.

[0020] According to an embodiment of the present invention, the upper end of the second actuator is rotatably connected to a first connecting shaft mounted on the edge of the tilting panel opposite the third actuator, and the lower end of the second actuator is rotatably connected to a second connecting shaft mounted on the panel support member so as to be positioned between the tilting shaft and the third actuator.

[0021] According to an embodiment of the present invention, a plurality of sliders are fixedly mounted on the lower surface of the panel support member, and are slidably coupled to the sliding rails.

[0022] According to an embodiment of the present invention, the sliding grooves of the first and second rotating plates have a concave groove shape that is open in the axial direction of the workpiece, and concave groove-shaped elastic member fixing grooves into which ends of elastic members are inserted and fixed are formed on the surfaces of the opposing ends of each sliding bar and the opposing sliding groove, and guide panels configured to close the open parts of the sliding grooves and guide the moving direction of the sliding bars are attached to each surface of the first and second rotating plates in the axial direction of the workpiece.

[0023] According to an embodiment of the present invention, a plurality of pulleys are rotatably mounted on the outer side of the rotation guide groove forming surface of the fixed panel or tilting panel so as to be radially arranged at regular intervals from the center of the rotation guide groove, and the outer surface of each pulley supports the outer surface of the rotation guide rim.

[0024] According to an embodiment of the present invention, stoppers are formed on both longitudinal ends of the sliding rail to limit the moving distance of the panel support member.

[0025] According to an embodiment of the present invention, a clamp stopper is formed at the end of the sliding bar on the side where the elastic member fixing groove is formed, with part of the surface of the sliding bar protruding along the axial direction of the workpiece, and a catch occurs between the clamp stopper and the guide panel when the elastic member is stretched due to elastic recovery. [Effects of the Invention]

[0026] According to an embodiment of the present invention, a structure is adopted in which a separate actuator for controlling the gripping and releasing of the workpiece relative to the clamp is not added, thereby making it possible to reduce the axial thickness of the workpiece in the fixing device, and by reducing the maximum approach distance that the bending device can move toward the gripping portion, it is possible to relax the restrictions on the minimum bendable length of the workpiece, thereby achieving the effect of relaxing the restrictions on the shape and size of the shaft-shaped finished product that can be bent.

[0027] According to an embodiment of the present invention, by supporting an upper structure mounted on a sliding rail via a slider composed of two or more divided members, the load acting on the sliding rail is distributed along the longitudinal direction of the rail, the contact area of ​​the connection between the sliding rail and the slider is reduced, friction at the connection is reduced, the driving energy consumed in the bending process is reduced, and vibration at the contact surface between the sliding rail and the slider is prevented, thereby improving the bending process accuracy.

[0028] According to an embodiment of the present invention, the coupling and separation of the first and second rotating plates are controlled by controlling the tilting operation of the tilting panel through the operation of the second actuator, and the workpiece is gripped or released through a clamp formed at the boundary of the coupling surface between the first and second rotating plates, thereby reducing the time required for the fixing or separation process of the workpiece and improving the bending efficiency. [Brief explanation of the drawings]

[0029] [Figure 1] 10A and 10B are diagrams showing opening and closing operation states of a rotating plate of a fixing device according to an embodiment of the present invention, and directions defined to explain the positional relationship between each component of the fixing device. [Figure 2] 1 is a diagram showing the overall structure of a fixing device according to an embodiment of the present invention; [Figure 3] 1A and 1B are diagrams illustrating a connecting structure between a sliding rail and a panel support member according to an embodiment of the present invention. [Figure 4] 3A and 3B are diagrams showing the structure and shape of the inner surfaces of the fixed panel and tilting panel according to an embodiment of the present invention. [Figure 5] 10A and 10B are diagrams showing a facing arrangement structure between a fixed panel and a tilting panel at a fixed distance in accordance with an embodiment of the present invention; [Figure 6] 10A and 10B are diagrams showing the structure and shape of the joint surfaces between the fixed panel, the tilting panel and the rotating plate according to an embodiment of the present invention; [Figure 7] 10A and 10B are diagrams showing a rotary plate support structure via a pulley in a closing and opening operation state of the rotary plate according to an embodiment of the present invention. [Figure 8] 10A and 10B are diagrams showing a rotary plate support structure via a pulley in a closing and opening operation state of the rotary plate according to an embodiment of the present invention. [Figure 9] 3A and 3B are diagrams showing the structure of the coupling surface of the rotating plate according to the embodiment of the present invention; [Figure 10] 10A and 10B are diagrams illustrating a rotary plate support structure via a pulley of a fixing device according to an embodiment of the present invention. [Figure 11]1A and 1B are diagrams illustrating the structure of a sliding bar and a gripping action via a clamp according to an embodiment of the present invention. [Figure 12] 10A to 10C are diagrams illustrating a process of machining a workpiece by longitudinal movement of a sliding rail of a fixing device according to an embodiment of the present invention. [Figure 13] 10A to 10C are diagrams illustrating a process of machining an object by rotating a rotary plate of a fixing device according to an embodiment of the present invention. [Figure 14] 10A to 10C are diagrams showing the process of aligning the boundaries of the connection parts between the rotating plate and the fixed panel and tilting panel for loading or unloading a workpiece in a fixing device according to an embodiment of the present invention, and the process of opening and closing the rotating plate by tilting the tilting panel. DETAILED DESCRIPTION OF THE INVENTION

[0030] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0031] The following will be described in detail, focusing on the parts necessary for understanding the operation and function of the present invention.

[0032] While describing the embodiments of the present invention, technical details that are well known in the technical field to which the present invention pertains and are not directly related to the present invention will be omitted in order to more clearly convey the gist of the present invention without obscuring it.

[0033] Furthermore, in describing the components of the present invention, different reference numerals may be used to refer to components with the same name depending on the drawing, and the same reference numeral may be used to refer to components in different drawings.

[0034] However, even in such cases, this does not mean that the components have different functions depending on the embodiment, or that they have the same function in different embodiments, but rather the function of each component should be determined based on the description of each component in the embodiment.

[0035] Furthermore, unless otherwise defined in this specification, technical terms used in this specification should be interpreted as meanings that are commonly understood by a person having ordinary knowledge in the technical field to which this invention belongs, and should not be interpreted as meanings that are overly inclusive or overly narrow.

[0036] Furthermore, as used herein, singular terms include plural terms unless the context dictates otherwise.

[0037] In this application, terms such as "comprise" or "include" should not be interpreted as necessarily including all of the components or steps described in the specification, but should be interpreted as meaning that some components or steps may not be included, or that additional components or steps may be included.

[0038] The fixing device (10) for bending a workpiece (1), which is a shaft-shaped member according to the present invention, comprises a sliding rail (100) fixed to the bottom surface, a panel support member (110) disposed on the sliding rail (100), fixed and tilting panels (200, 300) mounted on the panel support member (110) so as to be able to be opened and closed, a rotating plate (400) disposed between the fixed and tilting panels (200, 300), and an actuator for controlling the movement of the panel support member (110), the opening and closing operation of the tilting panel (300), and the rotational drive of the rotating plate (400), as shown in Figures 1 and 2.

[0039] In this specification, the longitudinal direction of the workpiece (1), which has a circular outer or inner peripheral surface like a rod or pipe and whose axial length is greater than its diameter, is defined as the axial direction of the workpiece (1), and the connection or arrangement relationship between the components of the fixing device (10) will be described.

[0040] In addition, the direction in which the upper structure including the panel support member (110), the fixed and tilting panels (200, 300), and the rotating plate (400) slides, which is perpendicular to the axial direction of the workpiece (1) and parallel to the bottom surface, is defined as the longitudinal direction of the sliding rail (100), and the connection or arrangement relationship between each component of the fixing device (10) will be described.

[0041] As shown in FIG. 3, the sliding rail (100) is made of a rod-shaped member whose longitudinal width is larger than the axial width of the workpiece (1), and whose cross-sectional shape is such that the width of the upper sliding rail (100) in the axial direction of the workpiece (1) is larger than the width of the lower sliding rail (100) in the axial direction of the workpiece (1).

[0042] The connecting portion of the upper structure mounted on the sliding rail (100) and the sliding rail (100) has a rail groove having a cross-sectional shape complementary to the cross-sectional shape of the sliding rail (100), preventing the upper structure from detaching or separating from the sliding rail (100) during the process of sliding along the longitudinal direction of the sliding rail (100).

[0043] The sliding rail (100) is arranged on the bottom surface along a direction perpendicular to the axial direction of the workpiece (1), and a panel support member (110) is arranged on the upper part of the sliding rail (100) so as to be able to slide along the longitudinal direction of the sliding rail (100).

[0044] A plurality of sliders (120) are fixedly mounted on the lower surface of the panel support member (110), and a rail groove having a cross-sectional shape complementary to the cross-sectional shape of the sliding rail (100) is formed on the lower surface of the slider (120) along the longitudinal direction of the sliding rail (100), and the sliding rail (100) and the slider (120) are inserted and coupled together.

[0045] The slider (120), which is divided into two or more members, is connected so as to be able to slide along the sliding rail (100), and distributes the load acting on the sliding rail (100) from the upper structure mounted on the sliding rail (100) along the longitudinal direction of the sliding rail (100).

[0046] At the same time, by reducing the contact area of ​​the connection between the sliding rail (100) and the slider (120) and thereby reducing the generation of friction at the connection, it is possible to reduce the driving energy consumed to move the upper structure mounted on the sliding rail (100) via the actuator in the longitudinal direction of the sliding rail (100) for bending the workpiece (1).

[0047] Furthermore, vibrations occurring at the contact surface between the sliding rail (100) and the slider (120) are prevented, thereby improving the bending accuracy of the workpiece (1) and reducing the occurrence of shortening of the durability life of the fixing device (10) due to wear on the contact surface between the sliding rail (100) and the slider (120).

[0048] The slider (120) is made of a rod-shaped member in which the longitudinal width of the sliding rail (100) is larger than the axial width of the workpiece (1), and the longitudinal width of the sliding rail (100) of the slider (120) is made shorter than that of the sliding rail (100) so that bending of the workpiece (1) can be performed by sliding the upper structure.

[0049] In addition, stoppers (130) are formed on both longitudinal ends of the sliding rail (100), and the stoppers (130) limit the movement distance of the panel support member (110) or the slider (120) moving along the sliding rail (100), thereby preventing separation or separation between the sliding rail (100) and the slider (120).

[0050] On one longitudinal side of the sliding rail (100) of the panel support member (110), a pair of fixed panels (200) each forming a plate-shaped member are arranged along both side surfaces of the panel support member (110) in the direction of the workpiece (1), with the lower surfaces of the fixed panels (200) fixedly attached, and the fixed panels (200) are spaced apart by the width of the panel support member (110) in the direction of the workpiece (1), with the inner surfaces of the opposing fixed panels (200) parallel to each other.

[0051] Each fixed panel (200) has a first opening (201) formed by recessing an edge portion thereof facing the other longitudinal end of the sliding rail (100) of the panel support member (110) into a semicircular shape.

[0052] A tilting shaft (111) having a circular cross section is attached to the center of the panel support member (110) so as to penetrate along both side surfaces of the workpiece (1), and the tilting shaft (111) is arranged so as to be parallel to the axial direction of the workpiece (1).

[0053] A pair of plate-shaped tilting panels (300) are arranged on the other longitudinal side of the sliding rail (100) of the panel support member (110) relative to the fixed panel (200), and each tilting panel (300) is spaced apart at a width interval corresponding to the axial separation distance of the workpiece (1) between the fixed panels (200), with the inner surfaces of opposing tilting panels (300) parallel to each other.

[0054] A plurality of fixed panel spacing members and tilting panel spacing members can be attached to the opposing inner surfaces between the fixed panels (200) on both sides and the tilting panels (300) on both sides, thereby improving the strength of the fixed panels and tilting panels (200, 300) that support the rotating plate (400) through the fixed panel spacing members and tilting panel spacing members, and improving the dimensional accuracy of the bending process of the workpiece (1).

[0055] Each tilting panel (300) has a second opening (301) formed by recessing the edge facing one longitudinal end of the sliding rail (100) of the panel support member (110) to form a semicircular shape, and the second opening (301) has a shape symmetrical to the first opening (201).

[0056] At the lower end of the second opening (301) side of the tilting panels (300) on both sides, a tilting shaft connection hole is formed so as to penetrate the inner and outer surfaces of each tilting panel (300) along the axial direction of the workpiece (1), and a tilting shaft (111) attached to the center of the panel support member (110) is inserted and connected to the tilting shaft connection hole, so that the tilting panel (300) can perform a tilting operation in which it tilts toward the other side in the longitudinal direction of the sliding rail (100) around the tilting shaft (111) as the rotation center axis, and can return to its original position.

[0057] As shown in Figures 1 and 4 to 5, when the tilting panel (300) is in its original position after tilting, the upper ends of the first opening (201) of the fixed panels (200) on both sides and the upper ends of the second opening (301) of the tilting panels (300) on both sides come into contact with each other, and the lower ends of the first opening (201) of the fixed panels (200) on both sides and the lower ends of the second opening (301) of the tilting panels (300) come into contact with each other, so that the first opening and the second opening (201, 301) form a circular opening.

[0058] In the tilting operation state of the tilting panel (300), the upper sides of the boundary between the first opening and the second opening (201, 301) move apart, opening the top of the circular opening, and in the original position state of the tilting operation of the tilting panel (300), the upper sides of the boundary between the first opening and the second opening (201, 301) come into contact with each other, closing the top of the circular opening. Therefore, hereinafter, the tilting operation state of the tilting panel (300) is defined as the closed state of the boundary between the first opening and the second opening (201, 301), and the original position state of the tilting operation of the tilting panel (300) is defined as the open state of the boundary between the first opening and the second opening (201, 301), respectively, and the structure and operation of the fixing device (10) according to the present invention will be described.

[0059] When the boundary between the first opening and the second opening (201, 301) is closed, the boundary of the connection between the fixed panel (200) and the tilting panel (300) has a sloped structure such that the distance from the tilting axis (111) along the longitudinal direction of the sliding rail (100) increases as it moves from the bottom to the top.

[0060] In addition, in order to prevent interference between the lower edge of the tilting panel (300) and the panel support member (110) during the tilting operation of the tilting panel (300) due to the opening of the boundary between the first opening and the second opening (201, 301), the lower edge of the tilting panel (300) is formed with an inclined slope so that the distance from the upper surface of the panel support member (110) increases as it moves away from the tilting axis (111).

[0061] The inclined slope of the lower edge of the tilting panel (300) provides a clearance space between the opposing portions between the lower end of the tilting panel (300) and the upper surface of the panel support member (110) when the tilting panel (300) is tilting.

[0062] The tilting action of the tilting panel (300) is performed by the operation of a second actuator (502) mounted on the tilting panel (300), and the second actuator (502) is mounted on the tilting panel (300).

[0063] When the boundary between the first opening and the second opening (201, 301) is closed, a circular disk-shaped rotating plate (400) is inserted into the circular opening formed by the first opening and the second opening (201, 301) so as to be rotatable around the axial direction of the workpiece (1), and the rotating plate (400) has a structure in which a first rotating plate (401) and a second rotating plate (402), which are members having a semicircular cross-sectional shape, are connected to each other so as to be separable from each other.

[0064] A clamp (420) for fixing the outer periphery of the workpiece (1) is formed on the edge of the semicircular center of each of the first and second rotating plates (401, 402). When the boundary between the first and second openings (201, 301) is closed, the rotating plate (400) rotates based on the central axis of the workpiece (1) fixed to the clamps (420) on both sides, and the outer periphery of the rotating plate (400) and the circular openings formed by the first and second openings (201, 301) are concentric with each other.

[0065] A driven gear (410) consisting of a plurality of gear teeth arranged at a certain angle and height is formed on the outer peripheral surface of the first rotating plate and the second rotating plate (401, 402), and when the boundary between the first opening and the second opening (201, 301) is closed, the rotating plate (400) forms a spur gear-shaped structure.

[0066] A driving gear (430) consisting of a spur gear meshes with the driven gear (410) on the outer periphery of the rotating plate (400), and both ends of the rotation shaft of the driving gear (430) are connected to the both side fixed panels (200) or both side tilting panels (300), respectively, so that the driving gear (430) is located between the both side fixed panels (200) or both side tilting panels (300).

[0067] A first actuator (501) configured to provide a rotational driving force to the drive gear (430) is connected to the rotation shaft of the drive gear (430), and the driving force of the first actuator (501) is transmitted via the drive gear (430) and the driven gear (410), thereby rotating the workpiece (1) fixed to the rotating plate (400) and clamp (420).

[0068] A third actuator (503) is attached to the end of the panel support member (110), and the third actuator (503) slides the panel support member (110) along the longitudinal direction of the sliding rail (100) to perform bending processing of the workpiece (1) in the longitudinal direction of the sliding rail (100).

[0069] The workpiece (1) can be formed so that multiple curved portions are formed in the shape of the finished product, such as a stabilizer bar that constitutes a vehicle suspension system, and the direction of the curves changes continuously along the direction of a three-dimensional coordinate system.

[0070] Therefore, with the boundary between the first opening and the second opening (201, 301) closed and the workpiece (1) fixed between the two clamps (420), i) by actuating the third actuator (503) to move along the longitudinal direction of the sliding rail (100); or ii) The first and third actuators (501, 503) are actuated to simultaneously rotate the workpiece (1) in the axial direction and move the sliding rail (100) in the longitudinal direction. In this way, bending of the workpiece (1) having a complex curve is performed.

[0071] When bending the workpiece (1) in the longitudinal direction of the sliding rail (100) via the third actuator (503), the direction in which the bending is performed along the axial direction of the workpiece (1) can be switched by rotating the workpiece (1) by a certain angle via the first actuator (501).

[0072] This makes it possible to perform bending processing on the workpiece (1) having a shape in which a plurality of curved portions are formed or in which the curve direction changes continuously depending on the direction in a three-dimensional coordinate system.

[0073] In order to fix and mount the workpiece (1) via the clamp (420) for bending the workpiece (1), or to separate the workpiece (1) from the clamp (420) after bending has been completed, the second actuator (502) is operated to tilt the tilting panel (300), thereby opening the boundary between the first opening and the second opening (201, 301).

[0074] When the boundary between the first opening and the second opening (201, 301) is open, the upper sides of the boundary between the first opening and the second opening (201, 301) are separated from each other, opening the top of the circular opening, and the workpiece (1) is drawn in or separated and drawn out through the open gap at the top of the circular opening.

[0075] At this time, since the rotating plate (400) is divided into two parts consisting of the first rotating plate and the second rotating plate (401, 402), the boundaries of the connecting parts of the first rotating plate and the second rotating plate (401, 402) must both be open so that the clamps (420) formed on the edges of the semicircular centers of the first and second rotating plates (401, 402) can be exposed to the open gaps of the first and second openings (201, 301).

[0076] Therefore, in order to open the boundary between the first opening and the second opening (201, 301) due to the tilting action of the tilting panel (300), the boundary of the connection part between the first rotating plate and the second rotating plate (401, 402) must be rotated at a specific angle by the operation of the first actuator (501), so that the boundary surface of the connection part between the fixed panel (200) and the tilting panel (300) and the boundary surface of the connection part between the first rotating plate and the second rotating plate (401, 402) are positioned on the same plane.

[0077] In addition, due to the structural characteristics of the rotating plate (400), which is a spur gear that meshes with the drive gear (430), it should rotate freely inside the circular opening formed by the first opening and the second opening (201, 301) when it is closed, and at the same time, when the boundary between the first opening and the second opening (201, 301) is open, the first rotating plate and the second rotating plate (401, 402) must be restrained so that they do not come off the first opening (201) or the second opening (301).

[0078] Therefore, as shown in FIG. 6, a rotation guide groove (202) may be formed on the inner surface of one or both sides of the opposing sides of the fixed panel (200) and the tilting panel (300), and the rotation guide groove (202) is a recessed groove that forms a circular ring shape when the upper ends of the fixed panel (200) and the tilting panel (300) come into contact with each other when the first opening and the second opening (201, 301) are closed.

[0079] When the first and second rotary plates (401, 402) are combined, the rotary plate (400) has a rotary guide rim (403) that protrudes in the shape of a circular ring on the surface facing the rotary guide groove (202), and the rotary guide rim (403) is rotatably inserted into the rotary guide groove (202).

[0080] The diameter of the outer circumferential surface of the semicircular ring of the rotation guide rim (403) formed on the first and second rotating plates (401, 402) is smaller than the diameter of the bottom of the gear teeth of the driven gear (410) formed on the first and second rotating plates (401, 402), and the diameter of each of the first and second openings (201, 301) of the fixed panel (200) and the tilting panel (300) is smaller than the diameter of the inner circumferential surface of the semicircular ring of the rotation guide rim (403) formed on the first and second rotating plates (401, 402).

[0081] The depth and width of the rotation guide groove (202) are formed to be greater than the height and width of the protrusion of the rotation guide rim (403), allowing the rotation of the rotation plate (400) by the operation of the first actuator (501), and the rotation guide groove (202) guides the rotation of the rotation guide rim (403) while maintaining a constant position of the center point of the rotation axis of the rotation plate (400).

[0082] Since the position of the center point of the rotating plate (400) is formed to be constant, it is possible to prevent the position of the rotation center axis of the workpiece (1) from changing except for the movement of the rotation center axis of the workpiece (1) due to the operation of the third actuator (503), thereby improving the bending processing accuracy of the workpiece (1).

[0083] As shown in Figures 7 and 8, the weight of the rotary plate (400) causes the rotary plate (400) to move downward by the tolerance size formed in the rotary guide groove (202) and the rotary guide rim (403), which changes the position of the rotation center axis of the rotary plate (400). In order to prevent vibrations from occurring due to friction between the inner surface of the rotary guide groove (202) and the outer surface of the rotary guide rim (403), the rotary guide rim (403) is supported by a plurality of pulleys (203).

[0084] The pulley (203) is rotatably mounted on a pulley mounting groove recessed into the outer side of the surface of the rotation guide groove (202) of the fixed panel (200) or the tilting panel (300), and the rotation axis of the pulley (203) is arranged radially at a fixed distance from the center of the rotation guide groove (202).

[0085] The outer circumferential surface of each pulley (203) contacts the outer circumferential surface of the rotating guide rim (403) to support the rotating guide rim (403), and when the rotating plate (400) rotates, the pulleys (203) rotate together, reducing the vibrations generated in the rotating plate (400), preventing the rotating plate (400) from biasing downward due to its own weight, and maintaining a constant position of the rotational axis of the rotating plate (400).

[0086] As shown in Figures 9 and 10, a connection hole for the first connection shaft is formed on the edge of the tilting panel (300) facing the third actuator (503), and the connection hole for the first connection shaft can be formed integrally on the tilting panel (300) or on a member fixedly attached to the tilting panel (300).

[0087] The panel support member (110) is formed with a connecting hole for the second connecting shaft so as to be positioned between the tilting shaft (111) and the third actuator (503), and the first and second connecting shafts (302, 112) are inserted and fixed into the connecting holes of the first and second connecting shafts, respectively.

[0088] The upper end of the second actuator (502) is rotatably connected to the first connecting shaft (302), and the lower end of the second actuator (502) is rotatably connected to the second connecting shaft (112).

[0089] By operating the second actuator (502), the tilting panel (300) tilts or returns to its original position, the boundary between the first opening and the second opening (201, 301) is opened or closed, and in the process of opening or closing the boundary between the first opening and the second opening (201, 301), the connection angle between the tilting panel (300) and the second actuator (502), and between the second actuator (502) and the panel support member (110) is changed.

[0090] The clamps (420) formed on the first and second rotating plates (401, 402), respectively, may be configured such that a sliding bar (422) is inserted into a sliding groove (421) formed on the semicircular central edge of the first and second rotating plates (401, 402) recessed toward the outer periphery of the rotating plate (400) so as to be slidable toward or away from the center point of the rotating plate (400) in a direction.

[0091] A grip portion (423) for fixing the workpiece (1) is formed at the end of each sliding bar (422) toward the center point of the rotating plate (400). As shown in FIG. 11, each grip portion (423) is formed so that the width in the axial direction of the workpiece (1) is greater than the height in the vertical direction, and the opposing ends of both grip portions (423) are formed with V-shaped recesses whose depth varies along the vertical direction.

[0092] The cross-sectional shape of the grip portion (423) as described above increases the length of the grip between the grip portion (423) and the workpiece (1) in the axial direction of the workpiece (1), and improves the gripping force of the grip portion (423) to prevent a change in the grip angle of the workpiece (1) against the torsional force acting on the workpiece (1) during bending of the workpiece (1), thereby improving the bending accuracy of the workpiece (1).

[0093] In this case, in order to further improve the gripping force of the grip portion (423), it is preferable to form the grip portion (423) so that the direction of action of the external force applied to the workpiece (1) for bending the workpiece (1) is parallel to the opposing arrangement direction between the both side grip portions (423).

[0094] Concave-shaped elastic member fixing grooves (425) are recessed into the inner surfaces of the opposing sliding grooves (421) of the first and second rotating plates (401, 402) and the opposite end of the grip portion (423) of each sliding bar (422), and both ends of an elastic member (424) are inserted and fixed into the opposing elastic member fixing grooves (425) of the sliding grooves (421) and the sliding bar (422).

[0095] The elastic member (424) deflects and moves each sliding bar (422) toward the center of the first rotating plate and the second rotating plate (401, 402) to firmly fix the workpiece (1), and supports and fixes the workpiece (1) by compressing or expanding the elastic member (424) according to the diameter of the workpiece (1) fixed to the clamp (420), thereby enabling bending of workpieces (1) of various specifications.

[0096] Each sliding groove (421) of the first and second rotating plates (401, 402) may have a concave groove shape with both sides open along the axial direction of the workpiece (1), and guide panels (426) may be removably attached to both surfaces of the first and second rotating plates (401, 402) that are open along the axial direction of the workpiece (1).

[0097] The guide panel (426) closes the open side of the sliding groove (421) to guide the sliding bar (422) so that it can move linearly along the depth direction of the sliding groove (421), and prevents the sliding bar (422) from slipping out through the open side.

[0098] In this case, the edge of the recessed end of the sliding groove (421) of the guide panel (426) may be attached at a certain distance from the surface of the inner surface of the sliding groove (421) where the elastic member fixing groove (425) is formed toward the center of the rotating plate (400), and a clamp stopper (427) may be formed on the surface of both ends of the longitudinal direction of the sliding rail (100) on the side where the elastic member fixing groove (425) of the sliding bar (422) is formed, with a part of the surface protruding toward the axial direction of the workpiece (1).

[0099] When the length of the elastic member (424) is extended due to elastic recovery, the clamp stopper (427) catches on the side of the guide panel (426), preventing the sliding bar (422) from being separated from the sliding groove (421).

[0100] In addition, a margin of space is provided for the sliding bar (422) to slide along the sliding groove (421) by the distance between the guide panel (426) and the inner surface of the sliding groove (421), thereby enabling the workpiece (1) to be supported and fixed via the grip portion (423) in accordance with the diameter of the workpiece (1) having various specifications.

[0101] The magnitude of the gripping force of the gripping portion (423) for supporting and fixing the workpiece (1) can be controlled by changing the type of elastic member (424) installed between the sliding groove (421) and the sliding bar (422), and an appropriate level of gripping force can be provided by installing an elastic member (424) having a different elastic modulus according to the required gripping force of the gripping portion (423).

[0102] Furthermore, the clamp (420) of the fixing device (10) according to the present invention is configured so that a separate actuator for controlling gripping and releasing of the workpiece (1) is not mounted on the surface of the rotating plate (400), and the axial thickness of the workpiece (1) of the fixing device (10) can be reduced compared to conventional fixing devices.

[0103] This makes it possible to reduce the maximum distance that the bending device for the workpiece (1) can move toward the grip portion (423) of the fixing device (10) during the bending process, and by relaxing the restriction on the minimum bendable length of the workpiece (1), it is possible to relax the restrictions on the shape and size of the shaft-shaped finished product that can be bent.

[0104] In addition, the first actuator (501) configured to rotate the workpiece (1) fixed to the clamp (420) and the second actuator (502) configured to tilt the tilting panel (300) are positioned at a certain distance from the central axis of the workpiece (1), thereby preventing interference with a bending device approaching the fixing device (10) and forming a structure that can lower the limit on the minimum bending length.

[0105] The process of bending the workpiece (1) using the fixing device (10) of the present invention configured as described above comprises a fixing and positioning step of the workpiece (1), a bending step of the workpiece (1), and a separation step of the workpiece (1).

[0106] As shown in FIG. 14, the first actuator (501) is operated to rotate the rotating plate (400) by a specific angle, and the boundary of the connecting portion between the first and second openings (201, 301) of the fixed panel (200) and the tilting panel (300) is aligned with the boundary of the connecting portion between the first and second rotating plates (401, 402). Then, the second actuator (502) is operated in the contracting direction to tilt the tilting panel (300), and the boundary between the first and second openings (201, 301) is opened. With the boundary between the first and second openings (201, 301) open, the fixing and positioning step of the workpiece (1) is performed.

[0107] The workpiece (1) is pulled between the first and second rotating plates (401) through the first and second openings (201, 301) and the open sides of the fixed panel (200) and tilting panel (300) to position the workpiece (1) between the two clamps (420). Then, when the second actuator (502) is operated in the extension direction, the tilting panel (300) returns to its original position and the two clamps (420) firmly fix the outer periphery of the workpiece (1).

[0108] Thereafter, in the bending process stage of the workpiece (1), as shown in Figures 12 and 13, the third actuator (503) is operated to move the workpiece (1) fixed to the rotating plate (400) along the longitudinal direction of the sliding rail (100) while bending the workpiece (1), and the first actuator (501) is operated depending on the position and bending direction of the curved portion of the workpiece (1) to change the bending direction of the workpiece (1).

[0109] The bending of the workpiece (1) by the operation of the third actuator (503) and the change of the bending direction of the workpiece (1) by the operation of the first actuator (501) can be carried out separately or simultaneously depending on the shape of the finished workpiece (1).

[0110] The bending process for the sliding rail (100) of the workpiece (1) at different positions in the longitudinal direction is performed by moving a bending device (not shown) along the axial direction of the workpiece (1). When the workpiece (1) has a shape symmetrical to each other along the axial direction, the bending devices of the two machines are arranged on both sides of the axial direction of the workpiece (1) of the fixing device (10), and the bending device performs the bending process in the direction approaching the fixing device (10), thereby improving the bending accuracy of the workpiece (1).

[0111] When the bending process step of the workpiece (1) is completed, the separation step of the workpiece (1) is carried out. During the separation step of the workpiece (1), the first actuator (501) is actuated to rotate the rotating plate (400) by a specific angle, so that the boundary of the connecting portion of the first opening and the second opening (201, 301) of the fixed panel (200) and the tilting panel (300) coincides with the boundary of the connecting portion of the first rotating plate and the second rotating plate (401, 402).

[0112] Thereafter, the second actuator (502) is operated in the contracting direction, causing the tilting panel (300) to tilt, and the boundary between the first opening and the second opening (201, 301) is opened, and the clamp (420) releases the workpiece (1) from its fixed state.

[0113] Once the workpiece (1) is released from the clamp (420), the workpiece (1) is separated from the clamp (420) and pulled out through the first and second openings (201, 301) and the open sides of the fixed panel (200) and tilting panel (300), thereby completing the bending process of the workpiece (1).

[0114] Although the embodiments of the present invention have been described with reference to the above content, those skilled in the art to which the present invention pertains will understand that the present invention can be embodied in other specific forms without changing its technical concept or essential characteristics.

[0115] Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not limiting. The scope of the present invention described in the above detailed description is indicated by the claims set forth below, and all modifications and variations derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. [Explanation of symbols]

[0116] 1: Processing object 10:Fixing device 100: Sliding rail 110: Panel support member 111: Tilting axis 112:Second connection shaft 120: Slider 130: Stopper 200: Fixed panel 201: First opening 202: Rotation guide groove 203: Pulley 300: Tilting Panel 301: Second opening 302: 1st connection shaft 400: Rotating plate 401: First rotating plate 402: Second rotating plate 403: Rotating guide rim 410: Driven gear 420: Clamp 421: Sliding groove 422: Sliding bar 423: Grip section 424: Elastic member 425: Elastic member fixing groove 426: Guide panel 427: Clamp stopper 430: Drive gear 501: First actuator 502: Second actuator 503: Third actuator

Claims

1. A sliding rail (100) arranged along a direction perpendicular to the axial direction of the shaft-shaped workpiece (1); a panel support member (110) disposed on the upper portion of the sliding rail (100) and slidable along the 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 longitudinal direction of the sliding rail (100) of the panel support member (110) so as to be spaced apart at a predetermined distance along the axial direction of the workpiece (1); and a first opening (201) formed by recessing the edge facing the tilting panel (300) so as to have a semicircular shape; a tilting shaft (111) attached to the center of the panel support member (110) so as to be parallel to the axial direction of the workpiece (1); a pair of plate-shaped members arranged on the other side of the longitudinal direction of the sliding rail (100) of the panel support member (110) so as to be spaced apart at a predetermined distance along the axial direction of the workpiece (1); and a second opening (301) formed by recessing an edge facing the fixed panel (200) in a semicircular shape symmetrical to the first opening (201), the lower end of which is connected to the second opening (301) side so as to be tiltable about the tilting shaft (111); a rotating plate (400) in the form of a circular disk, in which first and second rotating plates (401, 402) having semicircular cross sections are detachably coupled to each other, and inserted into a circular opening formed by the first opening and the second opening (201, 301) so as to be rotatable about the axial direction of the workpiece (1), with a driven gear (410) formed on the outer circumferential surface, and with clamps (420) formed on the edge of the semicircular center of each of the first and second rotating plates (401, 402) for fixing the outer circumferential surface of the workpiece (1); a drive gear (430) configured to mesh with the driven gear (410) on the outer circumferential surface of the rotating plate (400); a first actuator (501) configured to provide a rotational driving force to the drive gear (430) to rotate the rotating plate (400) and the workpiece (1) fixed to the clamp (420); a second actuator (502) mounted on the tilting panel (300) and configured to tilt the tilting panel (300) about the tilting axis (111) to open or close the boundary between the first opening and the second opening (201, 301); and a third actuator (503) attached to an end of the panel support member (110) and configured to slide the panel support member (110) along the longitudinal direction of the sliding rail (100); A fixing device for bending a shaft-shaped member, comprising:

2. 2. The fixation device of claim 1, the bending process is performed when, with the boundary between the first opening and the second opening (201, 301) in a closed state, the workpiece (1) fixed to the clamp (420) moves along the longitudinal direction of the sliding rail (100) by the operation of the third actuator (503), or when the workpiece (1) fixed to the clamp (420) rotates and moves simultaneously by the operation of the first actuator and the third actuator (501, 503); When the boundary between the first opening and the second opening is in an open state, the workpiece is fixed to or separated from the clamp; A fixing device characterized in that, through the operation of the first actuator (501), the rotating plate (400) is rotated so that the boundary of the connection portion between the fixed panel (200) and the tilting panel (300) and the boundary of the connection portion between the first rotating plate and the second rotating plate (401, 402) are arranged on the same plane, and then the opening or closing operation of the boundary portion between the first opening and the second opening (201, 301) is performed by the operation of the second actuator (502).

3. 2. The fixation device of claim 1, In a closed state of the boundary between the first opening and the second opening (201, 301), the boundary of the connection between the fixed panel (200) and the tilting panel (300) is inclined so that the distance from the tilting axis (111) along the longitudinal direction of the sliding rail (100) increases as it goes from the bottom to the top, A fixing device characterized in that the edge of the lower end of the tilting panel (300) forms an inclined slope whose distance from the upper surface of the panel support member (110) increases as it moves in a direction away from the tilting axis (111).

4. 2. The fixation device of claim 1, The clamp (420) a sliding groove (421) formed on the edge of each semicircular center of the first rotating plate and the second rotating plate (401, 402), and recessed toward the outer circumferential surface of the rotating plate (400); a pair of sliding bars (422) that are inserted into the sliding grooves (421) of the first and second rotating plates (401, 402) and slide along the sliding grooves (421), and that have gripping portions (423) formed at the ends of the centers of the first and second rotating plates (401, 402) to fix the workpiece (1); and an elastic member (424) whose both side ends are fixed to the inner surfaces of the sliding grooves (421) of the first and second rotating plates (401, 402) facing each other and to the ends of the sliding bars (422), and which is configured to deflect and move the sliding bars (422) toward the centers of the first and second rotating plates (401, 402); A fixation device comprising:

5. 2. The fixation device of claim 1, A rotation guide groove (202) is formed on one or both sides of the inner surfaces of the fixed panel (200) and the tilting panel (300) facing each other, the rotation guide groove (202) being recessed to form a circular ring shape when the first opening and the second opening (201, 301) are closed. A fixing device characterized in that a rotation guide rim (403) protruding in a semicircular ring shape and rotatably inserted into the rotation guide groove (202) is formed on each surface of the first and second rotation plates (401, 402) facing the rotation guide groove (202).

6. 2. The fixation device of claim 1, The upper end of the second actuator (502) is rotatably connected to a first connecting shaft (302) mounted on the edge of the tilting panel (300) opposite to the third actuator (503); A fixing device characterized in that a lower end of the second actuator (502) is rotatably connected to a second connecting shaft (112) mounted on the panel support member (110) so as to be positioned between the tilting shaft (111) and the third actuator (503).

7. 2. The fixation device of claim 1, The fixing device is characterized in that a plurality of sliders (120) are fixedly mounted on the lower surface of the panel support member (110) and slidably coupled to the sliding rails (100).

8. 5. The fixation device of claim 4, Each of the sliding grooves (421) of the first rotating plate and the second rotating plate (401, 402) has a concave groove shape that is open in the axial direction of the workpiece (1), Each of the sliding bars (422) and the opposing sliding grooves (421) has elastic member fixing grooves (425) formed on the surfaces of the opposing ends thereof, into which the ends of the elastic members (424) are inserted and fixed. A fixing device characterized in that a guide panel (426) configured to close the opening of the sliding groove (421) and guide the moving direction of the sliding bar (422) is attached to each surface of the first rotating plate and the second rotating plate (401, 402) in the axial direction of the workpiece (1).

9. 6. The fixation device of claim 5, A fixing device characterized in that a plurality of pulleys (203) are rotatably mounted on the outer side of the forming surface of the rotation guide groove (202) of the fixed panel (200) or the tilting panel (300) so as to be radially arranged at regular intervals from the center of the rotation guide groove (202), and the outer surface of each pulley (203) supports the outer surface of the rotation guide rim (403).

10. 8. The fixation device of claim 7, The fixing device is characterized in that stoppers (130) for limiting the moving distance of the panel support member (110) are formed on both ends of the sliding rail (100) in the longitudinal direction.

11. 9. The fixation device of claim 8, A fixing device characterized in that a clamp stopper (427) is formed at the end of the sliding bar (422) on the side where the elastic member fixing groove (425) is formed, with a part of the surface of the sliding bar (422) protruding along 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 due to elastic recovery.

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