Joint forming device for bent pipes

Abstract

The present application relates to a joint forming device for a bent pipe, which forms a lock joint by bending flanges of an adjacent pair of unit components among a plurality of unit components constituting a bent pipe, and includes a base for supporting lower portions of the pair of unit components, a lifting portion for moving the base in a vertical direction, an angle adjusting portion for adjusting a support angle of the base, a fixed chuck for supporting an inner peripheral surface of a connection site of the pair of unit components, a rotating portion for rotating the fixed chuck, and a forming portion for bending and forming a joint in a state where the flanges of the pair of unit components are in contact with each other.

Description

Technical Field

[0001] The present invention relates to a pipe bending joint forming apparatus, and more specifically, to a pipe bending joint forming apparatus capable of easily forming a locking joint at the connection point of multiple unit components constituting a pipe bending. Background Technology

[0002] Generally speaking, the more complex the pipeline design, the more bends will inevitably occur at the pipeline connection points. The reliability of the bends used in these bends becomes even more crucial to the efficiency of pipeline construction.

[0003] However, the process of manufacturing bends typically involves connecting multiple pipes and using tools such as hammers to strike the joints between them, inevitably leading to excessive manufacturing time and costs. Furthermore, because it can only be done manually by skilled operators, mass production is difficult.

[0004] Therefore, Korean Patent Publication No. 10-2003-0087619 discloses a structure in which a folded joint connection is formed at the connection part of a curved tube composed of multiple unit components. The folded joint connection is composed of a first folded part in the shape of a flange and a second folded part surrounding the outside of the double folded part.

[0005] However, while this type of connection can ensure sealing force in the initial state, it has the following problem: when the pipe structure is twisted or bent due to external forces applied to the pipe, the contact surfaces between the connections open, causing the sealing force to easily decrease.

[0006] In addition, in order to manufacture the bend, it is necessary to repeatedly perform the process of forming the folded joint connection by forming flanges on multiple segments of the tube. However, this repeated process is not arranged in a straight line, but is arranged along the shape of the bend, which makes the operation very difficult. Summary of the Invention

[0007] Therefore, the present invention is proposed to solve the problems described above, and its object is to provide a pipe bending joint forming apparatus that can easily form a locking joint at the connection point of multiple unit components constituting a pipe bend.

[0008] Furthermore, the object of the present invention is to provide a pipe bending joint forming apparatus that can easily form joints at the connection points of unit units with different angles on the lower support surfaces.

[0009] Further, an object of the present application is to provide a joint forming device for a bent pipe which forms a joint in a state where an inner circumferential surface of a connection portion of a pair of unit components is closely supported, thereby preventing deformation of the connection portion shape during the joint forming process.

[0010] The object is achieved by a joint forming device for a bent pipe which forms a lock joint by bending flanges of a pair of adjacent unit components among a plurality of unit components constituting a bent pipe, including a base for supporting lower portions of the pair of unit components, a lifting portion for moving the base in a vertical direction, an angle adjusting portion for adjusting a support angle of the base, a fixed chuck for supporting an inner circumferential surface of a connection portion of the pair of unit components, a rotating portion for rotating the fixed chuck, and a forming portion for forming a joint by bending in a state where the flanges of the pair of unit components are in contact.

[0011] Here, it is preferable that the lifting portion include a lifting worktable for supporting the lower portions of the base and a lifting driving portion for moving the lifting worktable in a vertical direction.

[0012] Further, it is preferable that the lifting driving portion include a plurality of lifting shafts arranged in parallel with a moving direction of the lifting worktable and fixed to lower portions of the lifting worktable, a connecting shaft arranged in a direction crossing the lifting shafts for connecting a pair of adjacent lifting shafts, and a lifting driving motor for providing a rotational driving force to the connecting shaft, wherein a rack and a pinion are formed at a connection portion of the connecting shaft and the lifting shafts, thereby adjusting an axial position of the lifting shafts by a shaft rotation of the connecting shaft.

[0013] Further, it is preferable that the angle adjusting portion include a rotating shaft for rotatably connecting the lifting worktable and the base, and a spacing adjusting portion for connecting one side of the lifting worktable and the base at a position spaced apart from the rotating shaft and adjusting an angle of the base by adjusting a spacing between the lifting worktable and the base.

[0014] Further, it is preferable that the fixed chuck include a chuck main body, and a plurality of support components arranged in a radial direction on the chuck main body and movable independently, wherein a support surface capable of supporting an inner circumferential surface of a connection portion of a pair of unit components is formed on an outer circumferential surface of the support components.

[0015] Further, it is preferable that the support surface is formed in a shape corresponding to the inner circumferential surface of the connection portion of the pair of unit components.

[0016] Further, it is preferable that the support surface is detachably assembled on the support components.

[0017] Further, it is preferable that the fixed chuck further include a lift pin configured to be able to be lifted in the center of the plurality of support members and to move the support members in an expansion direction according to a lift position.

[0018] Further, it is preferable that the fixed chuck further include an elastic body provided between the chuck body and the support members, respectively, and configured to elastically support the support members in a contraction direction.

[0019] Further, it is preferable that a guide groove be provided on a plate surface of the support member in a moving direction, and a guide protrusion be formed on an upper surface of the chuck body to be inserted into the guide groove.

[0020] Further, it is preferable that the forming portion include a moving portion configured to be able to move in a direction approaching or moving away from the center of the fixed chuck from the outside of the connection portion of the pair of unit members, a forward-backward driving portion configured to make the moving portion advance and retreat, and a forming roller supported on the moving portion to be able to advance and retreat with the moving portion and to be able to rotate on an axis.

[0021] Further, it is preferable that the forming portion further include a roller holder configured to be able to move in a direction parallel to the moving direction of the moving portion on the moving portion in a state of supporting the forming roller, and an elastic member interposed between the moving portion and the roller holder and configured to elastically support the roller holder in an advancing direction.

[0022] Further, it is preferable that the forming portion include a plurality of first forming portions, second forming portions, and third forming portions configured in a radial shape with the fixed chuck as a center,

[0023] The forming roller of the first forming portion includes a first forming surface that bends an end portion of a first flange of an "L" shape formed on an upper side edge of a lower unit member in a state in which a second flange of an "L" shape formed on a lower side edge of an upper unit member is installed on an upper side of the second flange, and forms a vertical joint,

[0024] The forming roller of the second forming portion includes a second forming surface that bends a joint configured in a horizontal direction by the first forming portion to be inclined toward an outer side surface of a pipe,

[0025] The forming roller of the third forming portion includes a third forming surface that forms a lock joint by closely attaching the joint bent by the second forming portion to the outer side surface of the pipe.

[0026] Further, it is preferable to further include a shelf configured to rotatably support the pair of unit members.

[0027] Further, it is preferable that the storage rack is arranged at a moving portion of the molding portion and is arranged to be able to advance and retreat toward a direction of the fixed chuck.

[0028] Further, it is preferable that a roller is arranged at a front end of the storage rack.

[0029] According to the present application, a joint molding device for a bent pipe is provided, which is capable of easily forming a snap joint at a connecting portion of a plurality of unit components constituting a bent pipe.

[0030] Further, a joint molding device for a bent pipe is provided, which is capable of easily forming a joint at a connecting portion of unit units having different angles of a lower support surface from each other.

[0031] Further, a joint molding device for a bent pipe is provided, which molds a joint in a state of closely adhering to an inner circumferential surface of a connecting portion of a pair of unit components, thereby being capable of preventing deformation of a shape of the connecting portion during molding of the joint. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a perspective view of the joint molding device for a bent pipe of the present application.

[0033] Figure 2 is an excerpt perspective view of a lifting portion and an angle adjusting portion of the joint molding device for a bent pipe of the present application.

[0034] Figure 3 is an excerpt perspective view of a fixed chuck and a rotating portion of the joint molding device for a bent pipe of the present application.

[0035] Figure 4 is an exploded perspective view of the fixed chuck of the joint molding device for a bent pipe of the present application.

[0036] Figure 5 is an excerpt perspective view of a molding portion and a storage rack of the joint molding device for a bent pipe of the present application.

[0037] Figure 6 is an exploded perspective view of the molding portion of the joint molding device for a bent pipe of the present application.

[0038] Figure 7 is a plan view of the joint molding device for a bent pipe of the present application.

[0039] Figure 8 is a side sectional view of the joint molding device for a bent pipe of the present application.

[0040] Figure 9 is a front sectional view of the joint molding device for a bent pipe of the present application.

[0041] Figure 10is a view showing a state in which a pair of unit components is supplied to the joint forming device for a bent pipe of the present application.

[0042] Figure 11 is an action view of a fixed chuck of the joint forming device for a bent pipe of the present application.

[0043] Figure 12 is an action view of a shelf and a lifting part of the joint forming device for a bent pipe of the present application.

[0044] Figures 13 to 15 is an action view showing a forming process of a lock joint by the forming part of the joint forming device for a bent pipe of the present application.

[0045] Figure 16 is a view showing a process of manufacturing a bent pipe by the joint forming device for a bent pipe of the present application.

[0046] BRIEF DESCRIPTION OF DRAWINGS

[0047] 10: device main body 11: first workbench 12: second workbench

[0048] 20: base 21: ring-shaped support 30: lifting part

[0049] 31: lifting workbench 32: lifting shaft 32a: rack

[0050] 33: connecting shaft 33a: pinion 34: lifting driving motor

[0051] 35: housing 40: angle adjusting part 41: rotating shaft

[0052] 42: driving part 43: first limiter 44: second limiter

[0053] 50: fixed chuck 51: chuck main body 51a: moving hole

[0054] 51a: guide protrusion 52: support part 52a: guide groove

[0055] 52b: support surface 53: lifting pin 54: cover

[0056] 55: spacer 56: slide pad 57: elastic body

[0057] 60: rotating part 61: hollow pipe 62: rotating driving part

[0058] 70a: first forming part 70b: second forming part 70c: third forming part

[0059] 71: moving part 72: forward and backward driving part 73: roller bracket

[0060] 74: molding roll 74a: first molding roll 74a1: first molding surface

[0061] 74b: second molding roll 74b1: second molding surface 74c: third molding roll

[0062] 74c1: third molding surface 75: elastic member 80: shelf

[0063] 81: roll Da: lower unit member Db: upper unit member

[0064] F1: first flange F2: second flange DETAILED DESCRIPTION

[0065] Before the present invention is described, it is to be understood that the same is not limited to the particular embodiments described, and as such may be practiced with modification and alteration within the scope and spirit of the present invention. The described embodiments are to be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as available for other similar features or aspects in other embodiments.

[0066] Hereinafter, a joint molding device for a bent pipe according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0067] In the drawings, Figure 1 is a perspective view of a joint molding device for a bent pipe according to the present invention, Figure 2 is an extracted perspective view of a lifting portion and an angle adjusting portion of the joint molding device for a bent pipe according to the present invention, Figure 3 is an extracted perspective view of a fixed chuck and a rotating portion of the joint molding device for a bent pipe according to the present invention, Figure 4 is an exploded perspective view of the fixed chuck of the joint molding device for a bent pipe according to the present invention, Figure 5 is an extracted perspective view of a molding portion and a shelf of the joint molding device for a bent pipe according to the present invention, Figure 6 is an exploded perspective view of the molding portion of the joint molding device for a bent pipe according to the present invention.

[0068] The joint molding device for a bent pipe according to the present invention as shown in the above-described drawings can improve a sealing force and a bonding force by molding first and second flanges F1 and F2 formed on an adjacent pair of unit members Da and Db among a plurality of unit members constituting a bent pipe into a lock seam form, and the joint molding device for a bent pipe includes a device main body 10, a base 20, a lifting portion 30, an angle adjusting portion 40, a fixed chuck 50, a rotating portion 60, a molding portion, and a shelf 80.

[0069] The device body 10 can include a first worktable 11 for supporting a lifting portion 30 supporting a lower portion of the base 20, a fixed chuck 50, and a rotating portion 60, and a second worktable 12 for supporting a molding portion, and an opening portion can be formed on a plate surface of the second worktable 12, and the first worktable 11 can be connected to the second worktable 12 at a lower side of the opening portion.

[0070] The base 20 is used to guide an assembly position of a pair of unit components Da and Db so that a connection portion of the pair of unit components Da and Db can be positioned between the fixed chuck 50 and the molding portion, and the base 20 can include an annular support 21 capable of supporting a lower end portion of a lower unit component Da of the pair of unit components Da and Db. A plurality of such annular supports 21 of various sizes are preferably provided so as to be selectively applied according to the specifications of the work object pipe.

[0071] The lifting portion 30 is used to move the base 20 up and down on the first worktable 11, and includes a lifting worktable 31 for supporting a lower portion of the base 20, and a lifting driving portion 42 for moving the lifting worktable 31 in an up-and-down direction.

[0072] The lifting driving portion 42 includes a plurality of lifting shafts 32 configured to be movable in a moving direction of the lifting worktable 31 on the first worktable 11 and fixed at upper end portions to a lower portion of the lifting worktable 31, a plurality of connection shafts 33 configured in a direction crossing the lifting shafts 32 for respectively connecting an adjacent pair of lifting shafts 32, and a lifting driving motor 34 for providing a rotational driving force to one of the connection shafts 33. In addition, a rack 32a and a pinion 33a are respectively formed at connection portions of the connection shafts 33 and the lifting shafts 32, so that an axial position of the lifting shafts 32 can be adjusted by shaft rotation of the connection shafts 33. In addition, the lifting portion 30 can further include a housing 35 wrapping the connection portions of the connection shafts 33 and the lifting shafts 32 and respectively supporting the axial positions of the connection shafts 33 and the lifting shafts 32.

[0073] Thus, the base 20 can support a lower unit component Da of a pair of unit components Da and Db stacked in an up-and-down direction in a state of being lifted by the lifting portion 30 and guide an assembly position of the pair of unit components Da and Db, and the base 20 is lowered by the lifting portion 30 after the lower unit component Da is supported by the placement stand 80 to be rotatable. Thus, during rotation of the lower unit component Da for molding of a lock joint, interference of the base 20 and the lower unit component Da with each other can be avoided. That is, a position at which the base 20 is lowered by the lifting portion 30 is preferably set to a position from which the lower unit component Da is sufficiently separated from a rotation area of the lower unit component Da.

[0074] According to the present embodiment, the bent pipe is composed of a plurality of unit components D1, D2, D3, D4, D5, which can be classified into end unit components D1, D5 located at both ends and intermediate unit components D2, D3, D4 located between both ends. At this time, the cutting surfaces corresponding to the connection points of the plurality of unit components D1, D2, D3, D4, D5 are designed to have an included angle that is not orthogonal to the central axis of each unit component, and the outer cutting surfaces of the end unit components D1, D5 are designed to be orthogonal to the central axis of each unit component. That is, the angle adjustment portion 40 is configured such that, when the intermediate unit components D2, D3, D4 are arranged as lower unit components Da, the base 20 for guiding the assembly position of the lower unit components Da can be adjusted to a first support angle a1, and when the end unit components are arranged as lower unit components Da, the base 20 can be adjusted to a second support angle a2 different from the first support angle (see Figure 16 ).

[0075] Such an angle adjustment portion 40 can include a rotation shaft 41 connecting the lifting worktable 31 and the base 20 to be rotatable, and a spacing adjustment portion connecting one side of the lifting worktable 31 and the base 20 at a position apart from the rotation shaft 41, and adjusting the angle of the base 20 by adjusting the spacing between the base 20 and the lifting worktable 31.

[0076] In addition, the spacing adjustment portion can include a driving portion 42 connecting one side of the base 20 and the lifting worktable 31 and performing extension and contraction driving to be able to adjust the connection length, a first stopper 43 arranged on one side of the lifting worktable 31 with the rotation shaft 41 as a reference, contacting the base 20 and guiding the first support angle of the base 20 when the driving portion 42 is extended, and a second stopper 44 arranged on the other side of the lifting worktable 31 with the rotation shaft 41 as a reference, contacting the base 20 and guiding the second support angle of the base 20 when the driving portion 42 is contracted. Furthermore, the first support angle and the second support angle can vary according to the pipe specification, and thus it is preferable that the first stopper 43 and the second stopper 44 are configured to control the support angle of the base 20 according to the pipe specification. For example, the first stopper 43 and the second stopper 44 can be configured to be screwed on the lifting worktable 31 and to be adjustable in the length protruding toward the base 20.

[0077] The fixed chuck 50 for supporting the inner circumferential surface of the connection portion of the pair of unit components Da, Db includes a chuck body 51 having a moving hole 51a formed in the center in the vertical direction, a plurality of support components 52 arranged in a radial pattern around the moving hole 51a of the chuck body 51 and movable individually, an outer circumferential surface of each of the plurality of support components 52 having a support surface 52b capable of supporting the inner circumferential surface of the connection portion of the pair of unit components Da, Db, a lift pin 53 arranged so as to be capable of lifting at a position corresponding to the moving hole 51a, the lift pin 53 being capable of being inserted into the moving hole 51a and moving the support component 52 in the expansion direction, a cover 54 arranged on the upper side of the chuck body 51 in a manner spaced apart from the chuck body 51 and covering the upper side of the plurality of support components 52, and a spacer 55 maintaining the spacing between the cover 54 and the chuck body 51.

[0078] A guide groove 52a can be provided on the plate surface of the support component 52 in the moving direction, a guide protrusion 51b can be formed on the upper surface of the chuck body 51 so as to be inserted into the guide groove 52a, and an elastic body 57 capable of elastically supporting the support component 52 in the contraction direction can be provided between the guide protrusion 51b and the guide groove 52a. Thus, when the lift pin 53 is lifted and the support component 52 is moved in the expansion direction, the support surface 52b supports the inner circumferential surface of the connection portion of the pair of unit components Da, Db while the elastic body 57 is compressed; when the lift pin 53 is lowered, the support component 52 is moved in the contraction direction by the elastic restoring force of the elastic body 57, and the support surface 52b is spaced apart from the inner circumferential surface of the connection portion of the pair of unit components Da, Db.

[0079] Further, the fixed chuck 50 further includes slide pads 56 provided on the upper and lower surfaces of the support component 52 between the support component 52 and the chuck body 51 and the cover 54, respectively. The slide pads 56 prevent direct contact of the support component 52 with the chuck body 51 and the cover 54 and minimize the moving friction, so that the plurality of support components 52 can be smoothly moved in a radial pattern according to the lifting position of the lift pin 53.

[0080] Further, it is preferable that the upper end edge of the lift pin 53 be formed as an inclined surface, and that the portion of the support component 52 that comes into contact with the upper end of the lift pin 53 be formed as an inclined surface having an inclination corresponding to that of the inclined surface of the lift pin 53.

[0081] The support components 52 are configured in a fan shape and are arranged in a plurality around the moving hole 51a of the chuck body 51, so as to have a disc shape as a whole.

[0082] Here, regarding the connecting portion of the pair of unit components Da, Db constituting the bent pipe, since the center axes constitute a prescribed included angle, the inner side surfaces of the pair of unit components Da, Db in the 3 o'clock direction and the 9 o'clock direction are parallel to each other with the center of the connecting portion as a reference, the included angle of the inner side surfaces of the pair of unit components Da, Db in the 6 o'clock direction is constituted by an acute angle greater than 180 degrees, and the included angle of the inner side surfaces of the pair of unit components Da, Db in the 12 o'clock direction is constituted by an obtuse angle less than 180 degrees. Therefore, the support surface 52b can be configured in a shape corresponding to the inner peripheral surface shape of the connecting portion of the pair of unit components Da, Db, and can be detachably assembled on the support component 52. Thus, support surfaces 52b corresponding to a plurality of types of pipes are respectively provided, and a support surface 52b corresponding to the type of a desired pipe can be selected and applied to the support component 52, so that a plurality of types of bent pipes can be manufactured using one device.

[0083] The overall peripheral edge shape of the plurality of support components 52 is formed in a shape corresponding to the cross-sectional shape of the connecting portion of the pair of unit components Da, Db, so that when the pair of unit components Da, Db is gripped by the fixed chuck 50, deformation of the cross-sectional shape of the connecting portion of the pair of unit components Da, Db can be avoided.

[0084] In general, regarding the inner peripheral surface shape of the connecting portion of an adjacent pair of unit components Da, Db among a plurality of unit components constituting a bent pipe, with the center point of the connecting portion as a reference, the included angle in the 3 o'clock direction and the 9 o'clock direction is constituted by 180 degrees, the included angle in the 12 o'clock direction is constituted by an acute angle (an angle greater than 180 degrees), and the included angle in the 6 o'clock direction is constituted by an obtuse angle (an angle less than 180 degrees), and the intermediate region is configured to gradually deform in this shape.

[0085] Therefore, by forming the shape of the support surface 52a disposed on the outer side of each of the plurality of support components 52 in a shape corresponding to the inner peripheral surface shape of the connecting portion of the pair of unit components Da, Db, deformation of the inner peripheral surface shape of the connecting portion of the pair of unit components Da, Db can be avoided during the process of bending the first flange Fl and the second flange F2 to form a joint.

[0086] In addition, a drive portion 42 that can provide power for raising and lowering the lift pin 53 can be disposed at the lower end of the lift pin 53, and the drive portion 42 can be configured in a form that can be extended and retracted, such as an air cylinder.

[0087] The rotating part 60 is used to rotate the fixed chuck 50, and a hollow part for accommodating the lifting pin 53 in a state of being movable in the length direction is provided inside the rotating part 60. The rotating part 60 includes a shaft 61 fixed below the fixed chuck 50 and a rotating driving part 62 for rotating the shaft 61. The rotating driving part 62 is composed of a driving motor and a transmission part, which can be composed of a belt and a pulley. In addition, the shaft 61 can be coaxially arranged with the lifting pin 53. For this purpose, the shaft 61 can be configured in the form of a hollow tube that can accommodate the lifting pin in the internal space.

[0088] The forming part is used to bend and form the first flange F1 of the lower unit part Da and the second flange F2 of the upper unit part Db into the form of a lock joint in a state of being in contact with each other. The forming part includes a moving part 71 arranged in a manner that it can move in the direction towards the center of the fixed chuck 50 on a plane, an advancing and retreating driving part 72 for making the moving part 71 advance and retreat, a roller bracket 73 supported on the moving part 71 and movable in the direction parallel to the moving direction of the moving part 71, a forming roller arranged on the front end of the roller bracket 73 and capable of rotating, and an elastic part 75 clamped between the moving part 71 and the roller bracket 73 and used to elastically support the roller bracket 73 in the advancing direction.

[0089] The advancing and retreating driving part 72 can include a driving motor, a ball screw rotated by the driving motor, and a ball nut fixed on the moving part 71 and engaged with the ball screw. The ball screw can be connected with the driving motor by a belt and a pulley and receive driving force. At the same time, the moving part 71 and the roller bracket 73 can be guided to move linearly back and forth by LM guides and the like, respectively.

[0090] In the present embodiment, a plurality of forming parts are provided, and the plurality of forming parts are arranged in a radial manner with the fixed chuck 50 as the center. The first flange F1 of the lower unit part Da and the second flange F2 of the upper unit part Db are bent and formed into the form of a lock joint by the plurality of forming parts in stages.

[0091] That is, according to the present embodiment, the forming section can be composed of a first forming section 70a provided with a first forming roller 74a for bending the end portion of the first flange Fl in an "L" shape to form a standing seam in a state where the second flange F2 in a "T" shape is attached to the upper side of the first flange Fl in an "L" shape, a second forming section 70b provided with a second forming roller 74b for bending the joint formed by the first forming roller 74a once in a horizontal direction to be inclined toward the outer side of the pipe, and a third forming section 70c provided with a third forming roller 74c for forming a snap joint by closely attaching the joint bent upward by the second forming roller 74b to the outer side of the pipe.

[0092] Here, the first forming roller 74a is formed in a shape where a first forming surface 74al is recessed in the center of the outer circumferential surface in a horizontal direction, and the end portion of the first flange Fl is bent to form a standing seam in a manner of wrapping the second flange F2 during the progress of the first forming roller 74a toward the fixed chuck 50.

[0093] Further, the second forming roller 74b is formed in a shape where a second forming surface 74bl is recessed in the center of the outer circumferential surface and is arranged in an upward direction at an angle of about 45 degrees, and the standing seam can be bent in the upward direction along the second forming surface 74bl during the progress of the second forming roller 74b toward the fixed chuck 50.

[0094] Further, a third forming surface 74cl is formed on the outer circumferential surface of the third forming roller 74c, and the joint bent upward by the second forming roller 74b is closely attached to the outer side of the upper unit member Db by the third forming surface 74cl of the second forming roller 74b to complete a snap joint during the progress of the third forming roller 74c toward the fixed chuck 50.

[0095] In addition, the connection portion of the lower unit member Da and the upper unit member Db has an elliptical cross-sectional shape, and at this time, since the forming roller is elastically supported by the elastic member 75 and is formed in a state of closely adhering to the outer circumferential surface of the connection portion while advancing and retreating within the elastic range of the elastic member 75, it is possible to prevent the distortion of the connection portion or the deterioration of the forming quality of the joint.

[0096] In addition, the vertical joint has a large frictional resistance at the time of molding, and thus the unit parts in rotation are subjected to eccentric load, and thus there is a problem that the first flange F1 and the second flange F2 of the pair of unit parts Da and Db are separated from the first molding surface 74a1 of the first molding roller 74a. In order to solve this problem, in the present embodiment, a plurality of the first molding portions 70a are provided, and are arranged in a relatively symmetrical manner on both sides of the pair of unit parts Da and Db. That is, when the vertical joint is molded on both sides of the connection portion of the pair of unit parts Da and Db at the same time, eccentric load is not generated or the effect of the eccentric load is small when the pair of unit parts Da and Db rotates, and thus the vertical joint having a large frictional resistance can be stably molded.

[0097] The stand 80 can support the first flange F1 of the lower unit part Da on the second work table 12 of the device main body 10, and can be arranged on the moving portion 71 of the first molding portion 70a. The stand 80 is arranged on the moving portion 71 so as to be able to advance and retreat in a direction toward the fixed chuck 50, and thus the position of the stand 80 can be adjusted according to the specification of the work object pipe, and the state of supporting the first flange F1 can be maintained during the advancing and retreating of the molding roller. In addition, in order to minimize the contact friction with the pipe, a roller 81 that is free to rotate in a state of supporting the unit part can be arranged at the front end of the stand 80.

[0098] Although the stands 80 are arranged on both sides of the plurality of first molding portions 70a in the present embodiment, various forms of modification can be made in addition thereto so that the rotation of the unit part can be stably supported on the second work table 11. For example, it is preferable to construct so as to increase or decrease the number of stands 80 according to the diameter of the work object pipe, so that the rotation of the unit part can be stably supported even when a large-sized bent pipe is manufactured.

[0099] Next, the operation of the first embodiment of the joint molding device for a bent pipe described above will be described.

[0100] In the drawings, Figure 7 is a plan view of the joint molding device for a bent pipe of the present application, Figure 8 is a side cross-sectional view of the joint molding device for a bent pipe of the present application, Figure 9 is a front cross-sectional view of the joint molding device for a bent pipe of the present application.

[0101] As Figures 7 to 9 shown, the base 20 can be raised and lowered in the vertical direction on the first work table 11 of the device main body 10 by the lifting portion 30, and the support angle of the base 20 supporting the lower portion of the lower unit part Da can be adjusted by the angle adjustment portion 40 arranged between the base 20 and the lifting portion 30.

[0102] The fixed chuck 50 is disposed through the center of the base 20 in a vertical direction and is supported on the second table 12 in a state of being able to rotate on an axis, and an upper end portion selectively supports an inner circumferential surface of a connection site of the pair of unit members Da, Db on an upper side of the base 20, thereby being able to fix or release the pair of unit members Da, Db, and a lower end portion is connected to the rotating portion 60 and receives a driving force for axis rotation.

[0103] The first molding portion 70a, the second molding portion 70b, and the third molding portion 70c constituting the molding portion are disposed in a radial shape on the second table 12 of the device main body 10 with the fixed chuck 50 as a center, the first molding portion 70a is provided in a plurality, and is spaced apart from each other with the second molding portion 70b and the third molding portion 70c and is disposed on both sides of the fixed chuck 50, respectively.

[0104] The shelf 80 is disposed on both sides of the plurality of first molding portions 70a, respectively, and can be advanced as needed to support the pair of unit members Da, Db in a state of being able to rotate.

[0105] In addition, although the first flange F1 is provided in an "L" shape in the present embodiment, when the pair of unit members Da, Db are provided in a state in which the first flange F1 and the second flange F2 extend in a horizontal direction, respectively, the molding portion can further have a molding portion that can mold the first flange F1 of the lower unit member Da in an "L" shape before the first molding portion 70a.

[0106] Next, a process of molding a lock joint on a connection site of a pair of unit members by the joint molding device for a bent pipe according to the present application configured as described above will be described.

[0107] In the drawings, Figure 10 is a view showing a state in which a pair of unit members is supplied to the joint molding device for a bent pipe according to the present application, Figure 11 is an action view of a fixed chuck of the joint molding device for a bent pipe according to the present application, Figure 12 is an action view of a shelf and a lifting portion of the joint molding device for a bent pipe according to the present application, Figures 13 to 15 is an action view showing a molding process of a lock joint by a molding portion of the joint molding device for a bent pipe according to the present application, Figure 16 is a view showing a process of manufacturing a bent pipe by the joint molding device for a bent pipe according to the present application.

[0108] First, as shown in Figure 10 , after the lower unit member Da among the pair of unit members Da, Db as connection objects is installed on the base 20, the upper unit member Db is positioned on an upper side of the lower unit member Da.

[0109] At this time, the lifting position and the support angle of the base 20 can be controlled by the lifting part 30 and the angle adjusting part 40, respectively, so that the connection part of the pair of unit parts Da, Db mounted on the base 20 can be positioned in the area between the fixed chuck 50 and the first molding part 70a to the third molding part 70c.

[0110] In the state that the pair of unit parts Da, Db are arranged on the base 20 as described above, the fixed chuck 50 is positioned inside the connection part of the pair of unit parts Da, Db as shown in Figure 11 Figure 11 (a), in the state that the lifting pin 53 of the fixed chuck 50 is lowered, the plurality of support parts 52 arranged between the chuck body 51 and the cover 54 of the fixed chuck 50 become a contracted state, so that the support surface 52b arranged on the outer circumferential surface of the support part 52 becomes a state of being separated from the inner circumferential surface of the pair of unit parts Da, Db.

[0111] Next, when the lifting pin 53 is raised as shown in Figure 11 (b), with the inner side end of the support part 52 being pressed by the lifting pin 53, the plurality of support parts 52 move in the direction away from the center of the fixed chuck 50, and in this process, the support surface 52b arranged on the outer circumferential surface of the support part 52 can support the inner circumferential surface of the connection part of the pair of unit parts Da, Db.

[0112] As described above, after the pair of unit parts Da, Db are fixed by the fixed chuck 50, the shelves 80 arranged on both sides of the plurality of first molding parts 70a are advanced as shown in Figure 12 , and after the lower part of the flanges F1, F2 of the pair of unit parts Da, Db are supported in a rotatable state, the base 20 is lowered by the lifting part 30, so that the base 20 does not interfere with the rotation of the lower unit part Da.

[0113] Figures 13 to 15 is a diagram showing the molding process of the shackle joint in steps, first as shown in Figure 13 ​As shown, when the fixed chuck 50 is axially rotated by the rotating unit 60, the pair of unit components Da, Db supported on the fixed chuck 50 is rotated together with the fixed chuck 50. In this state, when the first forming roller 74a of the forming unit is advanced, the first flange F1 and the second flange F2 of the pair of unit components Da, Db are brought into abutment with each other while being combined by the first forming surface 74al of the first forming roller 74a. That is, in the state where the "L"-shaped first flange F1 is mounted on the "T"-shaped second flange F2, the end portion of the first flange F1 extending in the vertical direction is bent in the horizontal direction and closely adheres to the upper side of the second flange F2 by the first forming surface 74al formed in the horizontal direction on the outer peripheral surface of the first forming roller 74a, thereby forming a shape of a vertical joint in which the first flange F1 wraps the lower and upper surfaces of the second flange F2. As described above, after one forming is completed, the moving unit 71 is retracted by the advancing and retracting driving unit 72 of the forming unit, and further the first forming roller 74a is separated from the pair of unit components Da, Db.

[0114] Next, as shown in FIG. 6, in the state where the pair of unit components Da, Db are rotated, the second forming roller 74b is advanced by the advancing and retracting driving unit 72 of the forming unit. Figure 14 When the second forming roller 74b is advanced, the second forming surface 74bl formed in the oblique direction on the outer peripheral surface of the second forming roller 74b presses the flanges F1, F2 in the upward direction, so that the flanges F1, F2 are arranged in the oblique direction in the upward direction.

[0115] Next, as shown in FIG. 7, in the state where the pair of unit components Da, Db are rotated, the third forming roller 74c is advanced by the advancing and retracting driving unit 72 of the forming unit. Figure 15 When the third forming roller 74c is advanced, the forming surface formed on the outer peripheral surface of the third forming roller 74c presses and closely adheres to the flanges F1, F2 arranged in the oblique direction in the upward direction, so that the flanges F1, F2 are formed in the form of a snap joint.

[0116] As described above, in the process of forming the flanges F1, F2 in the form of a snap joint by the first forming roller 74a, the second forming roller 74b and the third forming roller 74c, the inner peripheral surface of the connecting portion of the pair of unit components Da, Db is supported by the fixed chuck 50, so that smooth forming of the flanges F1, F2 can be achieved, and damage to the connecting portion of the pair of unit components Da, Db due to forming pressure can be prevented.

[0117] In addition, the bent pipe can be completed by repeating the process of connecting the pair of unit components Da, Db several times. Figure 16This refers to the process of manufacturing a bent pipe by connecting multiple unit components D1, D2, D3, D4, and D5. Although this embodiment illustrates a bent pipe composed of five unit components, it is not limited to this.

[0118] First, as Figure 16 As in (a), after positioning the second unit component D2 on the base 20 and placing the first unit component D1 above the second unit component D2, the first unit component D1 and the second unit component D2 are joined using the molding part. Next, the second unit component D2 mounted on the base 20 is removed, and as in (a) Figure 16 After setting the third unit component D3 as in (b), engage the third unit component D3 and the second unit component D2, disassemble the third unit component D3 mounted on the base 20, and as in (b). Figure 16 After setting the fourth unit component D4 as in (c), engage the fourth unit component D4 with the third unit component D3, disassemble the fourth unit component D4 mounted on the base 20, and as in Figure 16 After setting the fifth unit component D5 as in (d), the fifth unit component D5 and the fourth unit component D4 are joined together, thereby enabling the completion of a bend composed of multiple unit components D1, D2, D3, D4, and D5.

[0119] At this time, regarding the multiple unit components D1, D2, D3, D4, and D5 that constitute the bend, the surface connected to the adjacent unit component has a specified inclination relative to the central axis. The outer surfaces of the end unit components located at both ends of the bend, namely the first unit component D1 and the fifth unit component D5, are set to be orthogonal to the central axis for connection with other pipes.

[0120] That is, the connecting parts of a pair of unit components Da and Db are joined by the molding part in a horizontally arranged state and supported by the fixed clamp 50, so as... Figure 16 As in (a), (b), and (c), when the second unit component D2, the third unit component D3, and the fourth unit component D4 are configured as the lower unit component Da, the base 20 supports the lower unit component Da at a first support angle a1, as shown. Figure 16 When the fifth unit component D5 is configured as the lower unit component Da as in (d), the base 20 supports the lower unit component Da at a second support angle a2.

[0121] The support angle of this base 20 is adjusted by the angle adjustment part 40. Specifically, as shown in the figure... Figure 16As shown in (a) to (c), the base 20 is rotatably supported on the lifting platform 31 about the rotation axis 41. With the drive unit 42 supported on the lifting platform 31, the operating lever for extension / retraction drive is connected to the base 20. In this state, when the drive unit 42 is driven in the retraction direction, the base 20 rotates to one side about the rotation axis 41, thus adjusting the tilt of the base 20 to a first support angle. At this time, as the first limiter 43 provided on the lifting platform 31 supports the lower part of one side of the base 20, the position of the first support angle of the base 20 can be guided.

[0122] In addition, such as Figure 16 As in (d), when the drive unit 42 is driven along the extension direction, the base 20 rotates to the other side about the rotation axis 41, so the tilt of the base 20 can be adjusted to the second support angle. Here, as the second limiter 44 provided on the lifting worktable 31 supports the lower part of the other side of the base 20, the position of the second support angle of the base 20 can be guided.

[0123] According to the embodiment described above, a locking joint can be easily formed at the connection point of multiple unit components constituting the bend, and the locking joint is formed while the inner circumferential surface of the connection point is supported by the fixing clamp 50, thereby preventing deformation of the shape of the connection point during the forming process of the locking joint.

[0124] The scope of this invention is not limited to the embodiments described above, and can be implemented by various embodiments within the scope of the appended claims. Various modifications that can be made by those skilled in the art without departing from the spirit of the invention as claimed also fall within the scope of the claims.

Claims

1. A fitting forming apparatus for pipe bending, comprising bending the flanges of a pair of adjacent unit components constituting a pipe bending to form a locking fitting, comprising: A base, used to support the lower part of a pair of unit components; A lifting unit is used to move the base in the vertical direction; An angle adjustment section is used to adjust the support angle of the base; A fixed clamp is used to support the inner circumferential surface of the connection part of a pair of unit components; The rotating part is used to rotate the fixed clamping plate; and A forming section is used to form a joint by bending when the flanges of a pair of unit parts are in contact.

2. The pipe bending joint forming device according to claim 1, characterized in that, The lifting unit includes a lifting worktable for supporting the lower part of the base and a lifting drive unit for moving the lifting worktable up and down.

3. The pipe bending joint forming device according to claim 2, characterized in that, The lifting drive unit includes: a plurality of lifting shafts arranged parallel to the moving direction of the lifting worktable and fixed to the lower part of the lifting worktable; a connecting shaft arranged in a direction intersecting the lifting shafts for connecting an adjacent pair of lifting shafts; and a lifting drive motor for providing rotational driving force to the connecting shaft. A rack and pinion are formed at the connection between the connecting shaft and the lifting shaft, so that the axial position of the lifting shaft can be adjusted by rotating the connecting shaft.

4. The pipe bending joint forming device according to claim 2, characterized in that, The angle adjustment unit includes: A rotating shaft is used to rotatably connect the lifting worktable and the base; and An interval adjustment unit is connected to one side of the lifting worktable and the base at a position separated from the rotation axis, and is used to adjust the angle of the base by adjusting the interval between the lifting worktable and the base.

5. The pipe bending joint forming device according to claim 1, characterized in that, The fixed clamp includes: a clamp body; and a plurality of support members arranged radially on the clamp body and movable respectively, wherein a support surface is formed on the outer peripheral surface of the support member to support the inner peripheral surface of the connection part of a pair of unit members.

6. The pipe bending joint forming device according to claim 5, characterized in that, The support surface is shaped to correspond to the inner circumferential surface of the connection portion of a pair of unit components.

7. The pipe bending joint forming device according to claim 6, characterized in that, The support surface can be detachably assembled onto the support component.

8. The pipe bending joint forming device according to claim 5, characterized in that, The fixed clamp further includes a lifting pin, which is movably and vertically disposed at the center of a plurality of support components, and which allows the support components to move in the expansion direction according to the lifting position.

9. The pipe bending joint forming device according to claim 8, characterized in that, The fixed clamp further includes an elastic body, which is disposed between the clamp body and the support member and is used to elastically support the support member in the contraction direction.

10. The pipe bending joint forming device according to claim 5, characterized in that, A guide groove is provided on the plate surface of the support component along the moving direction, and a guide protrusion is formed on the upper surface of the chuck body to be inserted into the guide groove.

11. The pipe bending joint forming device according to claim 1, characterized in that, The forming section includes: a moving section configured to move in a direction approaching or moving away from the center of the fixed chuck from the outside of the connection portion of a pair of unit components; a forward and backward drive section for moving the moving section forward and backward; and a forming roller supported on the moving section to be able to move forward and backward with the moving section and to be axially rotatable.

12. The pipe bending joint forming device according to claim 11, characterized in that, The forming part further includes: a roller support, configured on the moving part to be movable in a direction parallel to the moving direction of the moving part while supporting the forming roller; and an elastic member, sandwiched between the moving part and the roller support and used to elastically support the roller support in the forward direction.

13. The pipe bending joint forming device according to claim 11, characterized in that, The molding section includes a first molding section, a second molding section, and a third molding section arranged radially around the fixed clamping plate, wherein there are multiple first molding sections. The forming roller of the first forming part includes a first forming surface. With an "L"-shaped first flange formed on the upper side of the upper edge of the lower unit component and an "I"-shaped second flange formed on the lower edge of the upper unit component mounted on the upper side of the first flange, the first forming surface is bent at the end of the first flange to form a vertical joint. The forming roller of the second forming part includes a second forming surface, which bends the vertical joint formed by the first forming part so that it is inclined toward the outer side of the tube. The forming roller of the third forming part includes a third forming surface, which forms a locking joint by tightly attaching the vertical joint bent by the second forming part to the outer side of the tube.

14. The pipe bending joint forming device according to claim 13, characterized in that, Further includes: A shelf is used to support a pair of unit parts in a rotating manner.

15. The pipe bending joint forming device according to claim 14, characterized in that, The shelf is disposed on the movable part of the forming part and is configured on the movable part to move forward and backward in the direction toward the fixed clamp.

16. The pipe bending joint forming apparatus according to claim 15, characterized in that, A roller is provided at the front end of the shelf.

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