CN111318598A - Bending die for rectangular pipe - Google Patents
Bending die for rectangular pipe Download PDFInfo
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- CN111318598A CN111318598A CN202010202768.2A CN202010202768A CN111318598A CN 111318598 A CN111318598 A CN 111318598A CN 202010202768 A CN202010202768 A CN 202010202768A CN 111318598 A CN111318598 A CN 111318598A
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- 238000005452 bending Methods 0.000 title claims abstract description 126
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 52
- 230000000149 penetrating effect Effects 0.000 claims 3
- 238000012856 packing Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
Abstract
A bending mould for rectangular pipes belongs to the technical field of pipe bending forming manufacturing. The invention solves the problem that the pipe bending forming quality is poor easily caused in the process of bending forming the pipe with the rectangular section by the existing bending die. The inside packing mould wears the rectangle voussoir of establishing between four right angle voussoirs including four right angle voussoirs and the cooperation that are the rectangle and arrange, threaded connection has the lead screw on the rectangle voussoir, respectively wears to be equipped with a locating lever on every right angle voussoir, and a tip of keeping away from the right angle voussoir on four locating levers is fixed through the mounting panel simultaneously, and a tip of keeping away from the rectangle voussoir on the lead screw rotates and wears to establish on the mounting panel. The internal filling mould can effectively solve the problem that the cross section of the rectangular pipe is unstable and distorted due to overlarge clamping force on the pipe when the rectangular pipe is formed by bending in the prior art, and can effectively reduce the relative slippage.
Description
Technical Field
The invention relates to a bending mould for a rectangular pipe, and belongs to the technical field of pipe bending forming manufacturing.
Background
The bending and forming are important components in the pipe bending and forming process. The bent pipe fitting has the advantages of light weight, high strength, low material consumption and the like, and has wide application in the fields of mechanical engineering, light industry, building industry, ships, aerospace and the like. In recent years, with the continuous development of technology and the increasing competition of industries, the requirements of various industries on the pipe bending forming quality are continuously improved.
At present, most of bending moulds applied to pipe bending machines are designed for circular-section pipes, and comprise pressing blocks, anti-wrinkling blocks, bending moulds, bending mould inserts and clamping moulds, wherein enough clamping force is provided by the clamping moulds to clamp the circular pipes, and the pipes are driven to move around the bending moulds to generate plastic deformation. Compared with a round section pipe, the stability of the rectangular section pipe is poor, when the clamping force is too large, the cross section of the rectangular pipe can be seriously deformed due to instability, a gap is generated between the surface of the rectangular pipe and a clamping die at the moment, the friction force between the surface of the rectangular pipe and the clamping die is reduced, relative sliding is generated, and the rectangular pipe is poor in bending forming quality.
Aiming at the problems, the mode of fixing the rectangular pipe by the pin is mainly adopted to ensure that the rectangular pipe and the clamping die do not slide relatively. This method requires pre-punching on the rectangular pipe, which will reduce the strength of the punched portion of the rectangular pipe. In addition, if the bending force is too large, the acting force between the rectangular pipe and the pin is too large, the deformation of the pin hole is serious, and the bending forming quality of the pipe is poor.
Disclosure of Invention
The invention aims to solve the problem that the quality of pipe bending forming is poor easily caused in the process of bending forming of a pipe with a rectangular section by using the conventional bending die, and further provides the bending die for the rectangular pipe.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a bending mould for rectangular pipes comprises a bending mould, an insert, a clamping mould, a pressing block and an anti-wrinkling block, wherein the bending mould, the clamping mould, the pressing block and the anti-wrinkling block are respectively and fixedly arranged on a pipe bending machine, the insert and the bending mould are fixedly integrated and are arranged opposite to each other, one end part of a rectangular pipe is arranged in a bending groove formed between the insert and the clamping mould in the bending forming process, the bending mould and the clamping mould do rotary motion along with the pipe bending machine, the pressing block does feed motion along with the pipe bending machine, the anti-wrinkling block keeps a static state,
it is still including inserting the inside packing mould of establishing in rectangle tubular product one end, the inside packing mould is including being four right angle voussoirs that the rectangle arranged and the rectangle voussoir of cooperation wearing to establish between four right angle voussoirs, threaded connection has the lead screw on the rectangle voussoir, respectively wears to be equipped with a locating lever on every right angle voussoir, and a tip of keeping away from the right angle voussoir on four locating levers is fixed through the mounting panel simultaneously, and a tip of keeping away from the rectangle voussoir on the lead screw rotates and wears to establish on the mounting panel, when promoting or pulling lead screw, and the rectangle voussoir is along lead screw axial displacement, and axial displacement through the rectangle voussoir.
Further, the length of the right-angle wedge block along the axial direction of the screw rod is not less than the length of the groove on the clamping die.
Further, the length of the right-angle wedge blocks is equal to that of the rectangular wedge blocks along the axial direction of the screw rod, and under the condition that the right-angle wedge blocks are flush with the two ends of the rectangular wedge blocks, the rectangular perimeter formed by the outer surfaces of the four right-angle wedge blocks is equal to the rectangular perimeter formed by the inner surface of the rectangular pipe.
Furthermore, the bending die is of a vertically arranged cylindrical structure, a rectangular ring groove is coaxially processed on the outer surface of the bending die along the circumferential direction of the bending die, a mounting hole is processed in the middle of the bending die along the axial direction of the bending die, a key groove communicated with the mounting hole is processed at the bottom of the bending die, the bending die is fixedly mounted on the pipe bending machine through the mounting hole and the key groove, a right-angle clamping groove is processed on the outer surface of the bending die along the axial direction of the bending die, and the insert is clamped on the right-angle clamping groove and fixedly mounted on the bending die through.
Furthermore, insert for the rectangular block structure, and set up L shape location logical groove on inserting, the height that the logical groove was led to in L shape location equals with the height of rectangle annular, and the medial surface of the vertical direction on the logical groove of L shape location is tangent with the anchor ring of rectangle annular.
Furthermore, the clamping die is of a split structure and comprises an upper die block and a lower die block which are distributed in a right-angle shape, the lower die block is fixedly arranged on the pipe bender, the upper die block is horizontally and fixedly arranged at the top of the lower die block through a screw, the clamping die and the insert are arranged oppositely, and the clamping die and the insert are enclosed into a rectangular pressing through hole in a close contact state.
Furthermore, the pressing block is of a split structure and comprises an upper pressing block and a lower pressing block which are distributed in a right-angle shape, the lower pressing block is fixedly mounted on the pipe bender, the upper pressing block is horizontally and fixedly mounted at the top of the lower pressing block through a screw, the height and the width of the upper pressing block are correspondingly equal to those of the upper module, the height and the width of the lower pressing block are correspondingly equal to those of the lower module, and the pressing block and the clamping die are arranged side by side and in alignment.
Furthermore, one end face of the anti-wrinkling block is an assembly inner arc face, the assembly inner arc face is in clearance fit with the annular face of the rectangular annular groove, and one side face, close to the pressing block, of the anti-wrinkling block is a plane and is located on the same vertical plane with the inner side face, in the vertical direction, of the L-shaped positioning through groove in the insert block.
Furthermore, a trapezoidal through groove is horizontally processed on one side, close to the clamping die, of the upper portion of the insert, and one end of the upper module is inserted into the trapezoidal through groove in a matched mode.
Furthermore, a trapezoidal ring groove is coaxially processed on the outer surface of the upper part of the bending die along the circumferential direction of the bending die, and one end of the upper pressing block is inserted into the trapezoidal ring groove in a matched mode.
Compared with the prior art, the invention has the following effects:
the internal filling mold can effectively solve the problem that the cross section of the rectangular pipe is unstable and distorted due to overlarge clamping force on the pipe when the rectangular pipe is formed by bending in the prior art, and can effectively reduce the relative slippage phenomenon; compare in the current mode of bending around that adopts the fixed rectangle tubular product of pin, the shaping quality of the crooked pipe fitting that obtains through the mould of bending around of this application is better.
Drawings
FIG. 1 is a schematic perspective view of a rectangular tube;
FIG. 2 is a schematic perspective view of the present application (rectangular tubing and internal filling mold not shown);
FIG. 3 is a schematic perspective view of an internal filling mold;
FIG. 4 is a schematic semi-sectional view of an internally filled mold;
FIG. 5 is a schematic perspective view of a rectangular wedge;
FIG. 6 is a perspective view of a right angle wedge;
FIG. 7 is a schematic view of a first perspective structure of a bending die;
FIG. 8 is a second perspective view of a bending die;
FIG. 9 is a schematic perspective view of an insert;
FIG. 10 is a perspective view of the clamping mold;
FIG. 11 is a schematic perspective view of a stamper;
fig. 12 is a schematic perspective view of a wrinkle preventing block.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 12, and a bending die for a rectangular pipe includes a bending die 1, an insert 2, a clamping die 3, a pressing die 4, and a blank-preventing block 5, wherein the bending die 1, the clamping die 3, the pressing die 4, and the blank-preventing block 5 are respectively and fixedly mounted on a pipe bender, the insert 2 and the bending die 1 are fixedly mounted as a whole, the insert 2 and the clamping die 3 are arranged opposite to each other, during a bending process, one end of the rectangular pipe is disposed in a bending groove formed between the insert 2 and the clamping die 3, the bending die 1 and the clamping die 3 rotate with the pipe bender, the pressing die 4 makes a feeding motion with the pipe bender, and the blank-preventing block 5 remains in a stationary state,
it is still including inserting the inside packing mould of establishing in a rectangular pipe material tip, the inside packing mould is including being four right angle voussoirs 8 that the rectangle arranged and the cooperation is worn to establish the rectangle voussoir 7 between four right angle voussoirs 8, threaded connection has lead screw 12 on the rectangle voussoir 7, respectively wears to be equipped with a locating lever 9 on every right angle voussoir 8, and a tip of keeping away from right angle voussoir 8 on four locating levers 9 is fixed through mounting panel 10 simultaneously, and a tip of keeping away from rectangle voussoir 7 on the lead screw 12 rotates and wears to establish on mounting panel 10, when promoting or pulling lead screw 12, rectangle voussoir 7 is along lead screw 12 axial displacement, realizes four right angle voussoirs 8 along the radial opening of lead screw 12 and shrink. The rectangular wedge block 7 is a rectangular block or a rectangular column with a gradually-changed section, the inner side surface of the right-angle wedge block 8 is connected with the outer surface of the rectangular wedge block 7 in a matched mode, and the length of the right-angle wedge block 8 in the axial direction of the screw rod 12 is not smaller than the length of an upper groove of the clamping die 3. The positioning rod 9 has a certain deflection to realize the displacement along the radial direction of the screw rod 12 under the action of the rectangular wedge block 7 while ensuring the axial positioning of the rectangular wedge block 8. The positioning rod 9 and the mounting plate 10 are locked and fixed through nuts.
As shown in fig. 4, when the rectangular wedge 7 moves along the axial direction of the screw rod 12, because the contact surface between the rectangular wedge 7 and the right-angle wedge 8 is an inclined surface and the fixing rod has a certain amount of deflection, the right-angle wedge 8 will displace in the direction perpendicular to the axial direction, and the support effect on the rectangular pipe or the internal filling mold can be pulled out of the rectangular pipe by pushing or pulling the screw rod 12. When the bending forming operation is needed, the internal filling mold is firstly arranged inside the rectangular pipe, the rectangular wedge blocks 7 are driven to move through the screw rods 12, and then the outer surfaces of the four right-angle wedge blocks 8 are in tight contact with the inner surface of the rectangular pipe, so that the rigidity of the rectangular pipe is effectively increased, and the relative sliding caused by the instability of the section of the rectangular pipe during the bending forming is prevented.
The bending die 1 is driven to rotate by the pipe bender, so that the bending forming process of the rectangular pipe is completed; and taking down the bent pipe fitting, pushing the screw rod 12, so that the right-angle wedge block 8 of the pipe internal filling mold moves along with the rectangular wedge block 7, and the outer surface of the right-angle wedge block 8 is separated from the inner surface of the rectangular pipe, thereby being convenient for taking out the pipe internal filling mold.
The bending groove further comprises a bending die 1 and a groove machined on a pressing die 4, and specifically comprises the following steps: the bending die 1 is a vertically arranged cylindrical structure, and a rectangular ring groove 15 is coaxially processed on the outer surface of the bending die along the circumferential direction of the bending die; a side surface of the insert 2, which is close to the clamping die 3, is provided with an L-shaped positioning through groove 21 along the length direction, and a clamping groove which is in a right-angle shape is formed in one side of the clamping die 3 and the pressing die 4, which is close to the bending die 1.
According to actual needs, the bending device can also place a proper gasket in the bent groove to meet bending of rectangular pipes with different section sizes.
In the actual bending forming manufacturing process, a core rod can be placed in the bending section to support according to needs, so that the bending part of the rectangular pipe is further prevented from deforming, and the bending forming quality of the rectangular pipe is further improved. The core rod is the prior art and is not described in detail herein.
The hydraulic transmission device on the pipe bender drives the clamping die 3 to clamp the rectangular pipe, so that the rectangular pipe is in close contact with the insert 2 and the anti-wrinkling block 5 of the anti-wrinkling block 5. The preferred rectangular tubing for the wrap-around die of the present application has a cross-sectional dimension of 50mmx50mm and a wall thickness of 2 mm.
The length of the right-angle wedge block 8 along the axial direction of the screw rod 12 is not less than the length of the groove on the clamping die 3.
The length of the right-angle wedge blocks 8 is equal to that of the rectangular wedge blocks 7 along the axial direction of the screw rod 12, and under the condition that the two ends of the right-angle wedge blocks 8 are flush with the two ends of the rectangular wedge blocks 7, the rectangular perimeter formed by the outer surfaces of the four right-angle wedge blocks 8 is equal to the rectangular perimeter formed by the inner surface of the rectangular pipe.
The bending die 1 is of a vertically arranged cylindrical structure, a rectangular ring groove 15 is coaxially processed on the outer surface of the bending die 1 along the circumferential direction of the bending die, a mounting hole 13 is processed in the middle of the bending die 1 along the axial direction of the bending die, a key groove 19 communicated with the mounting hole 13 is processed at the bottom of the bending die 1, the bending die 1 is fixedly arranged on the pipe bender through the mounting hole 13 and the key groove 19, a right-angle clamping groove 18 is processed on the outer surface of the bending die 1 along the axial direction of the bending die, and the insert 2 is clamped on the right-angle clamping groove 18 and fixedly arranged on the bending die. So design, during the operation of bending, place rectangle tubular product in the horizontal ring face of the bottom of rectangle annular groove 15 on, the ring face height of rectangle annular groove 15 and the bottom surface width size of rectangle annular groove 15 design according to the cross-sectional dimension of the rectangle tubular product of bending. The insert 2 is provided with a plurality of stepped through holes and is fixedly arranged on the bending die 1 through a plurality of stepped through holes and screws.
Insert 2 and be the rectangular block structure, and insert 2 and go up and set up L shape location through groove 21, the height that the groove 21 was led to in L shape location equals with the height of rectangle annular 15, and the ring face tangent of the medial surface of the vertical direction on the groove 21 of L shape location and rectangle annular 15.
The clamping die 3 is of a split structure and comprises an upper die block 23 and a lower die block 24 which are distributed in a right-angle shape, the lower die block 24 is fixedly mounted on the pipe bender, the upper die block 23 is horizontally and fixedly mounted at the top of the lower die block 24 through a screw, the clamping die 3 and the insert 2 are arranged oppositely, and the clamping die 3 and the insert 2 are in close contact with each other and form a rectangular pressing through hole in a surrounding mode. By the design, dovetail grooves are respectively and vertically processed on one side surface of the upper module 23 away from the insert 2 and one side surface of the lower module 24 away from the insert 2, and are fixed on the pipe bender through the dovetail grooves. A plurality of stepped through holes are processed on the upper module 23, a plurality of threaded holes are processed on the lower module 24, and the upper module 23 and the lower module 24 are fixed together through the threaded holes and the stepped through holes. The dovetail grooves on the two modules are arranged in an up-and-down alignment mode, and assembly accuracy is guaranteed.
The pressing die 4 is of a split structure and comprises an upper pressing block 30 and a lower pressing block 31 which are distributed in a right-angle shape, the lower pressing block 31 is fixedly mounted on the pipe bender, the upper pressing block 30 is horizontally and fixedly mounted at the top of the lower pressing block 31 through screws, the height and the width of the upper pressing block 30 are correspondingly equal to those of the upper module 23, the height and the width of the lower pressing block 31 are correspondingly equal to those of the lower module 24, and the pressing die 4 and the clamping die 3 are arranged side by side and in alignment. By the design, a plurality of stepped through holes are processed on the upper pressing block 30, a plurality of threaded holes are processed on the lower pressing block 31, and the upper pressing block 30 and the lower pressing block 31 are fixed together through the threaded holes and the stepped through holes. A rectangular positioning groove is vertically processed on one side surface of the upper pressing block 30 away from the insert 2 and one side surface of the lower pressing block 31 away from the bending die 1 respectively, and the rectangular positioning grooves are fixed on the pipe bender. The rectangular positioning grooves on the two pressing dies 4 are aligned up and down, so that the assembling precision is ensured.
One terminal surface of crease-resistant piece 5 is assembly intrados 38, the anchor ring clearance fit of assembly intrados 38 and rectangle annular 15, on the crease-resistant piece 5 be close to the moulding-die 4 a side be the plane and with insert 2 on the L shape location logical groove 21 vertical direction's of going up medial surface be located same vertical plane. So design, the anchor ring that assembly intrados 38 and rectangle annular 15 have good uniformity, and the one side that is close to moulding-die 4 on crease-resistant piece 5 is the crease-resistant face, and the crease-resistant face is tangent and have good plane degree with the anchor ring of rectangle annular 15, and it has certain intensity should be guaranteed in crease-resistant piece 5's dimensional design.
A trapezoidal through groove 20 is horizontally processed at one side of the upper part of the insert 2 close to the clamping die 3, and one end of an upper module 23 is inserted into the trapezoidal through groove 20 in a matching manner. By means of the design, the relative position between the upper module 23 and the bending die 1 is further defined through the trapezoidal through groove 20, and the forming quality of the finally bent and formed rectangular pipe is further guaranteed. The trapezoidal through groove 20 is sized to ensure that the upper module 23 coupled thereto has a certain strength. The cross-sectional dimension of the upper module 23 is designed according to the dimension of the trapezoidal through groove 20, so as to ensure that the upper surface of the upper module 23 is in contact with the inner surface of the trapezoidal through groove 20 after installation.
The outer surface of the upper part of the bending die 1 is coaxially processed with a trapezoidal ring groove 17 along the circumferential direction, and one end of the upper pressing block 30 is inserted in the trapezoidal ring groove 17 in a matching manner. By the design, the relative position between the upper pressing block 30 and the insert 2 is further limited by the trapezoidal ring groove 17, and the forming quality of the rectangular pipe finally formed by bending is further ensured. The size of the trapezoidal ring groove 17 is to ensure that the upper pressing block 30 which is matched and connected with the trapezoidal ring groove has certain strength.
The ring surface of the mounting hole 13 and the rectangular ring groove 15 and the ring surface in the trapezoidal ring groove 17 have good coaxiality during processing, so that the winding forming quality of the rectangular pipe is ensured. The central axis of the key groove 19 is arranged on the symmetry axis of the bending die 1, and the two side surfaces of the key groove 19 and one side surface of the right-angle clamping groove 18 which is arranged opposite to the clamping die 3 ensure good parallelism during processing, and ensure the assembly precision of the bending die 1 and the pipe bender.
The cross-sectional sizes of the trapezoidal through groove 20 and the trapezoidal ring groove 17 are kept consistent, so that the bending die 1 and the insert 2 are ensured to have good consistency.
Claims (10)
1. The utility model provides a mould of bending around for rectangle tubular product, it includes bending die (1), insert (2), press from both sides mould (3), moulding-die (4) and crease-resistance piece (5), wherein bending die (1), press from both sides mould (3), moulding-die (4) and crease-resistance piece (5) are adorned admittedly respectively on the bending machine, insert (2) with bending die (1) are adorned admittedly as an organic whole and insert (2) and press from both sides mould (3) and arrange relatively, and in the bending forming process, a tip of rectangle tubular product is arranged in the bending groove that inserts (2) and press from both sides and form (3) and form, and bending die (1) and press from both sides mould (3) are rotary motion along with the bending machine, and moulding-die (4) are the feed motion along with the bending machine, and crease-resistance piece (5) keep quiescent condition, its characterized in that:
the device also comprises an internal filling mould inserted in one end part of the rectangular pipe, the internal filling mould comprises four rectangular wedges (8) which are arranged in a rectangular shape and rectangular wedges (7) which are arranged between the four rectangular wedges (8) in a matching and penetrating way, the rectangular wedge blocks (7) are in threaded connection with screw rods (12), each right-angle wedge block (8) is provided with a positioning rod (9) in a penetrating manner, one end parts of the four positioning rods (9) far away from the right-angle wedge blocks (8) are fixed through mounting plates (10), one end parts of the screw rods (12) far away from the rectangular wedge blocks (7) are rotatably arranged on the mounting plates (10) in a penetrating manner, when the screw rods (12) are pushed or pulled, the rectangular wedge blocks (7) axially move along the screw rods (12), the four right-angle wedges (8) are expanded and contracted along the radial direction of the screw rod (12) through the axial movement of the rectangular wedges (7).
2. The wrap-bending die for rectangular tubing according to claim 1, wherein: the length of the right-angle wedge block (8) along the axial direction of the screw rod (12) is not less than the length of a groove on the clamping die (3).
3. The wrap-bending die for the rectangular pipe according to claim 2, wherein: the length of the right-angle wedge blocks (8) and the length of the rectangular wedge blocks (7) in the axial direction of the screw rod (12) are equal, and under the condition that the two ends of the right-angle wedge blocks (8) and the two ends of the rectangular wedge blocks (7) are parallel and level, the rectangular perimeter enclosed by the outer surfaces of the four right-angle wedge blocks (8) is equal to the rectangular perimeter formed by the inner surface of the rectangular pipe.
4. A wrap-bending mould for rectangular tubing according to claim 1, 2 or 3, wherein: the bending die (1) is of a vertically arranged cylindrical structure, a rectangular ring groove (15) is coaxially processed on the outer surface of the bending die along the circumferential direction of the bending die, a mounting hole (13) is processed in the middle of the bending die (1) along the axial direction of the bending die, a key groove (19) communicated with the mounting hole (13) is processed at the bottom of the bending die (1), the bending die (1) is fixedly mounted on a pipe bender through the mounting hole (13) and the key groove (19), a right-angle clamping groove (18) is processed on the outer surface of the bending die (1) along the axial direction of the bending die, and an insert (2) is clamped on the right-angle clamping groove (18) and fixedly mounted on the bending die (.
5. A wrap-bending mould for rectangular tubing according to claim 4, wherein: insert (2) and be the rectangular block structure, and insert and seted up L shape location on (2) and lead to groove (21), the height that the groove (21) was led to in L shape location equals with the height of rectangle annular (15), and the anchor ring of the up-right side of L shape location groove (21) and rectangle annular (15) is tangent.
6. A wrap-bending mould for rectangular tubing according to claim 5, wherein: the clamping die (3) is of a split structure and comprises an upper die block (23) and a lower die block (24) which are distributed in a right-angle shape, the lower die block (24) is fixedly arranged on the pipe bender, the upper die block (23) is horizontally and fixedly arranged at the top of the lower die block (24) through screws, the clamping die (3) and the insert (2) are arranged oppositely, and the clamping die (3) and the insert (2) are in close contact and enclose a rectangular pressing through hole.
7. The wrap-bending die for rectangular tubing according to claim 6, wherein: the pressing die (4) is of a split structure and comprises an upper pressing block (30) and a lower pressing block (31) which are distributed in a right-angle shape, the lower pressing block (31) is fixedly mounted on the pipe bender, the upper pressing block (30) is horizontally and fixedly mounted at the top of the lower pressing block (31) through screws, the height and the width of the upper pressing block (30) are correspondingly equal to those of the upper module (23), the height and the width of the lower pressing block (31) are correspondingly equal to those of the lower module (24), and the pressing die (4) and the clamping die (3) are arranged side by side and in alignment.
8. The wrap-bending die for rectangular tubing according to claim 7, wherein: an terminal surface of crease-resistant piece (5) is assembly intrados (38), the anchor ring clearance fit of assembly intrados (38) and rectangle annular (15), on crease-resistant piece (5) be close to a side of moulding-die (4) for the plane and with insert L shape location on (2) on groove (21) the medial surface of vertical direction be located same vertical plane.
9. The wrap-bending die for rectangular tubing according to claim 8, wherein: one side of the upper part of the insert (2) close to the clamping die (3) is horizontally provided with a trapezoidal through groove (20), and one end of the upper module (23) is inserted into the trapezoidal through groove (20) in a matching manner.
10. A wrap-bending die for rectangular tubing according to claim 9, wherein: a trapezoidal ring groove (17) is coaxially processed on the outer surface of the upper part of the bending die (1) along the circumferential direction, and one end of an upper pressing block (30) is inserted into the trapezoidal ring groove (17) in a matching manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202768.2A CN111318598A (en) | 2020-03-20 | 2020-03-20 | Bending die for rectangular pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202768.2A CN111318598A (en) | 2020-03-20 | 2020-03-20 | Bending die for rectangular pipe |
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| CN111318598A true CN111318598A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010202768.2A Pending CN111318598A (en) | 2020-03-20 | 2020-03-20 | Bending die for rectangular pipe |
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| US5586462A (en) * | 1994-01-31 | 1996-12-24 | Aisin Seiki Kabushiki Kaisha | Device and method for forming bent pipe of non-annular cross-section |
| JPH0857547A (en) * | 1994-08-24 | 1996-03-05 | Ykk Kk | Method for bending long size shaped metallic member and machine therefor |
| CN200942446Y (en) * | 2006-08-30 | 2007-09-05 | 宝山钢铁股份有限公司 | Inner support for processing special steel pipe button |
| CN203599317U (en) * | 2013-12-04 | 2014-05-21 | 艾默生网络能源（江门）有限公司 | Pipe bending machine |
| CN104307949A (en) * | 2014-10-08 | 2015-01-28 | 中山市炉旺电器有限公司 | Hollow aluminum profile cold bending molding die and molding technology using same |
| WO2017101507A1 (en) * | 2015-12-18 | 2017-06-22 | 河南奥斯派克科技有限公司 | House formed by connecting high-strength concave-convex trough-type steels |
| CN110238465A (en) * | 2019-05-17 | 2019-09-17 | 陕西飞机工业（集团）有限公司 | A kind of cylindrical internal thread part school type tooling |
| CN212121307U (en) * | 2020-03-20 | 2020-12-11 | 哈尔滨工业大学 | Bending die for rectangular pipe |
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