CN110394386B - Spiral fin coiled pipe bending machine and spiral fin coiled pipe manufacturing method - Google Patents
Spiral fin coiled pipe bending machine and spiral fin coiled pipe manufacturing method Download PDFInfo
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- CN110394386B CN110394386B CN201910728828.1A CN201910728828A CN110394386B CN 110394386 B CN110394386 B CN 110394386B CN 201910728828 A CN201910728828 A CN 201910728828A CN 110394386 B CN110394386 B CN 110394386B
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- composite pipe
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- 238000005452 bending Methods 0.000 title claims description 53
- 238000004519 manufacturing process Methods 0.000 title abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 112
- 239000002131 composite material Substances 0.000 claims abstract description 91
- 230000007935 neutral effect Effects 0.000 claims description 28
- 238000000465 moulding Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000007306 turnover Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000017105 transposition Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
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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
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a spiral fin coiled pipe bender and a manufacturing method of a spiral fin coiled pipe, wherein the spiral fin coiled pipe bender comprises a machine table, a rotary arm workbench, an up-down opening and closing die, a pipe body clamping mechanism and a side pushing device, the side pushing device comprises a side pushing moving seat capable of transversely moving relative to the front-back direction of the machine table, and a pushing guide plate arranged on the side pushing moving seat and capable of moving along the front-back direction, a guide groove for leaning against the side edge of a composite pipe body is arranged on the pushing guide plate, the side pushing moving seat realizes transverse movement through a side pushing mechanism, the pushing guide plate realizes front-back movement through a pushing cylinder, and the rotary arm workbench realizes rotation at a certain angle through a rotary driving mechanism. The invention improves the manufacturing efficiency and quality of the spiral fin coiled pipe and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of manufacturing of spiral fin coiled pipes, in particular to a spiral fin coiled pipe bender and a manufacturing method of a spiral fin coiled pipe.
Background
The spiral fin coiled pipe is a high-efficiency heat exchange pipe, and is formed by arranging spiral fins on the outer circle of the coiled pipe.
In the prior art, the manufacturing method of the spiral fin coiled pipe comprises the following two methods:
the method is that firstly, a U-shaped elbow and a straight pipe are manufactured, the spiral fins are sleeved on the straight pipe and welded, and then the spiral fins and the U-shaped elbow are assembled and welded.
The other method is that a section of straight pipe is prefabricated, an elbow is bent on the straight pipe, the spiral fin is sleeved on the straight pipe with the elbow and welded, and then assembling and welding are carried out.
In order to ensure the tightness of the pipeline, the two methods need to be performed with flaw detection after welding.
The manufacturing method of the spiral fin coiled pipe has the following problems: the pipe body is assembled and welded in a butt joint mode, the number of butt welding seams is large, welding and flaw detection costs are high, quality is not easy to guarantee, and manufacturing efficiency is very low.
Disclosure of Invention
In order to solve the problems, the invention provides a spiral fin coiled pipe bender and a pipe bending method, which aim to improve the manufacturing efficiency and quality of spiral fin coiled pipes and reduce the production cost. The specific technical scheme is as follows:
the utility model provides a spiral fin coiled pipe bender, is in including board, rotation setting is in the rocking arm formula workstation of board front end, set up on the rocking arm formula workstation and be located on the rocking arm formula workstation rotation center position be used for bending the upper and lower mould that opens and shuts of U type elbow on the spiral fin compound body, set up on the rocking arm formula workstation be used for with compound body compresses tightly the body clamping mechanism on the mould that opens and shuts from top to bottom, set up on the board be used for leaning on compound body side and carry out the side thrust device of side thrust helping hand, the side thrust device includes can be relative the lateral thrust movable seat of fore-and-aft direction lateral thrust movable of board, set up on the thrust movable seat can be along the thrust baffle of fore-and-aft direction, be provided with the guide slot that is used for leaning on compound body side, the lateral thrust movable seat realizes lateral movement through the side thrust material mechanism, the thrust baffle realizes back-and-forth movement through the thrust cylinder, the rotation of certain angle is realized through rotary driving mechanism to rocking arm formula workstation.
Preferably, the upper die and the lower die are combined in a downward movement mode and opened in an upward movement mode relative to the lower die through an opening and closing mechanism, and a semicircular cavity for positioning the composite pipe body is formed in the side face after the lower die and the upper die are combined.
And during bending, an integral bending method is adopted. A section of spiral fin is sleeved on a long straight pipe in advance, a neutral section for bending an elbow is reserved between spiral fins at two adjacent ends, a linear spiral fin composite pipe body is formed after all spiral fins are welded, then the neutral section part on the spiral fin composite pipe body is placed in an upper opening and closing tire mold and clamped, the side face of the composite pipe body is positioned in a guide groove of a pushing guide plate, a rotary arm type workbench is rotated to bend a U-shaped elbow, the composite pipe body is loosened after bending, the composite pipe body is turned 180 degrees around the axis of the straight pipe body part, and the next U-shaped elbow can be bent after the composite pipe body is clamped again, so that continuous bending of a spiral fin coiled pipe is realized.
The die for bending the pipe body is made into the up-down opening and closing moulding bed, the die can be opened rapidly after bending one elbow, the composite pipe body can be conveniently turned 180 degrees around the axis of the straight pipe part and then axially shifted and clamped to the next neutral section again to bend the next elbow, so that the continuous bending efficiency of the spiral fin coiled pipe is improved, and compared with the traditional manufacturing method, the pipe body is attractive in appearance, and weld flaw detection is omitted, so that the quality is further improved, and the production cost is reduced by more than 50%.
As a preferable scheme of the pipe body clamping mechanism, the pipe body clamping mechanism comprises a translation sliding table movably arranged on the rotary arm type workbench and a clamping ejector rod arranged on the translation sliding table, wherein the head part of the clamping ejector rod is provided with a semicircular cavity which is used for being matched with the semicircular cavity of the upper and lower opening and closing tire mold; the parallel four-bar mechanism realizes the translation of the translation sliding table serving as a parallel rod through a clamping cylinder and a traction connecting rod connected between the clamping cylinder and a crank of the parallel four-bar mechanism.
The pipe body clamping mechanism adopts a parallel four-bar mechanism, so that the head of the clamping ejector rod can avoid interference with the bent head part which is already bent in the moving process of clamping the pipe body.
As a preferable scheme of the side pushing and pressing mechanism, the side pushing and pressing mechanism is a sliding block four-bar mechanism, the side pushing and moving seat is used as a sliding block in the sliding block four-bar mechanism of the side pushing and pressing mechanism, and the sliding block four-bar mechanism of the side pushing and pressing mechanism realizes the transverse movement of the side pushing and moving seat through a side pushing cylinder connected with a crank in the sliding block four-bar mechanism.
As a preferable scheme of the rotary driving mechanism, the rotary driving mechanism comprises a hollow rotating shaft which is rotatably arranged at the rotating center of the rotary arm type workbench and fixedly connected with the rotary arm type workbench, a chain wheel transmission mechanism is arranged between the hollow rotating shaft and the workbench, and the chain wheel transmission mechanism pulls a chain in the chain wheel transmission mechanism to move through a traction cylinder so as to realize the rotation of the rotary arm type workbench.
The chain wheel transmission mechanism is connected in the machine table, and the structure is compact.
Further, as a preferable scheme of the opening and closing mechanism in the invention, the opening and closing mechanism is a sliding block four-bar mechanism, an up-and-down moving rod serving as a sliding block in the sliding block four-bar mechanism is arranged in the hollow rotating shaft, the upper end of the up-and-down moving rod is connected with the upper die, and the sliding block four-bar mechanism of the opening and closing mechanism realizes up-and-down movement of the up-and-down moving rod through an opening and closing cylinder connected with a crank in the sliding block four-bar mechanism.
Because the up-down moving rod is arranged in the hollow rotating shaft, the structure is compact, and the up-down opening and closing distance can be very large, thereby greatly facilitating the transposition operation of the composite pipe body in the bending process and improving the bending efficiency.
As a further improvement, the outer circle of the top end of the up-and-down moving rod of the spiral fin coiled pipe bender is also sleeved with a detachable reinforcing rod, and the other end of the reinforcing rod is fixedly arranged on the machine table.
The reinforcing rod is connected to the outer circle of the top end of the up-down moving rod, so that the stress deformation of the cantilever part at the upper end of the up-down moving rod is eliminated, and the reliability of positioning and clamping of the up-down opening and closing jig is improved.
As a further improvement, the spiral fin coiled pipe bender is further provided with a heading back clamping device for clamping the neutral gear section without spiral fins on the spiral fin composite pipe body at the rear end part of the side pushing device.
The push-up force can be increased by arranging the push-up rear clamping device, so that the bending quality of the small-bending circular arc radius composite pipe body is ensured.
In the invention, the hollow rotating shaft is provided with an angle encoder for detecting the rotating angle of the rotary arm type workbench.
Through setting up the angle encoder, the control system of cooperation bending machine can accurate control rocking arm formula workstation turned angle, realizes the accurate bending of elbow.
Preferably, the control system is a PLC control system.
The pipe bending method of the spiral fin coiled pipe bender sequentially comprises the following steps:
(1) Prefabricating a composite pipe body: sleeving a plurality of sections of spiral fins on the outer circle of the straight pipe, and reserving a neutral section for bending the U-shaped elbow between two adjacent sections of spiral fins, wherein the spiral fins are welded and fixed with the straight pipe to form a composite pipe body formed by welding the spiral fins and the straight pipe;
(2) And (3) feeding: placing the composite pipe body on a pipe bending machine, so that a first neutral gear section on the composite pipe body is positioned on an up-and-down opening and closing tire mold arranged on a rotary arm type workbench, and a composite pipe body part positioned at the rear end of the first neutral gear section is placed on the machine;
(3) Clamping: driving a pipe body clamping mechanism on the rotary arm type workbench to tightly press and fix a neutral gear section part positioned on the upper and lower opening and closing moulding bed on the composite pipe body;
(4) The composite pipe body is flat: the side pushing and pressing mechanism is arranged on the driving machine and pushes the side pushing and moving seat of the side pushing device to transversely move, and the guide groove of the pushing guide plate on the side pushing and moving seat is enabled to be flat with the side edge of the composite pipe body;
(5) Bending: the rotary arm type workbench is driven to rotate, and drives the composite pipe body part on the front end of the upper and lower opening and closing moulding bed on the composite pipe body to rotate to a certain angle together to form a U-shaped elbow; when the rotary arm type workbench rotates, a pushing cylinder arranged on a side pushing moving seat of the side pushing device acts, so that a pushing guide plate and a composite pipe body positioned in a guide groove of the pushing guide plate move forwards together to form side pushing assistance;
(6) Loosening: the pipe body clamping mechanism is loosened, the side pushing material mechanism is loosened, the upper and lower opening and closing moulding bed is loosened, and the pushing cylinder is retracted;
(7) And (3) unloading: pulling out the composite pipe forwards from the upper and lower opening and closing moulding bed for a section, and enabling the part of the composite pipe with the bent front end to rotate and turn over 180 degrees around the axis of the part of the composite pipe with the unbent rear end;
(8) Resetting the rotary arm type workbench: the rotary arm type workbench rotates in the opposite direction for resetting;
(9) Composite tube reinstallation positioning: positioning the next neutral gear section of the composite pipe body on an upper and lower opening and closing tire mold arranged on a rotary arm type workbench, and enabling the composite pipe body part positioned at the rear end of the next neutral gear section to be positioned on the workbench;
(10) And (3) repeating the steps (3) to (9) until all the U-shaped elbows are bent completely.
The beneficial effects of the invention are as follows:
firstly, the invention relates to a coiled pipe bender for spiral fins and a manufacturing method of coiled pipes, because the mould for bending the pipe body is made into an up-down opening and closing moulding bed, after bending one elbow, the mould can be opened rapidly, the composite pipe body can be turned over 180 degrees around the axis of the straight pipe part conveniently, and then the composite pipe body is axially shifted and clamped to the next neutral section again to bend the next elbow, thereby improving the continuous bending efficiency of the coiled pipe for spiral fins.
Secondly, according to the spiral fin coiled pipe bender and the manufacturing method of the spiral fin coiled pipe, the pipe body clamping mechanism adopts the parallel four-bar mechanism, so that the head of the clamping ejector rod can avoid interference with the bent head part which is already bent in the moving process of clamping the pipe body.
Third, according to the spiral fin coiled pipe bender and the manufacturing method of the spiral fin coiled pipe, the up-and-down moving rod is arranged in the hollow rotating shaft, so that the structure is compact, and a very large up-and-down opening and closing distance can be realized, thereby greatly facilitating the transposition operation of the composite pipe body in the bending process and improving the bending efficiency. The reinforcing rod is connected to the outer circle of the top end of the up-down moving rod, so that the stress deformation of the cantilever part at the upper end of the up-down moving rod is eliminated, and the reliability of positioning and clamping of the up-down opening and closing jig is improved.
Fourth, according to the spiral fin coiled pipe bender and the manufacturing method of the spiral fin coiled pipe, the push-up force can be increased by arranging the upsetting back clamping device, so that the bending quality of the small-bending circular arc radius composite pipe body is ensured.
Fifth, according to the spiral fin coiled pipe bender and the manufacturing method of the spiral fin coiled pipe, the rotation angle of the rotary arm type workbench can be accurately controlled by arranging the angle encoder and matching with the control system of the pipe bender, so that accurate bending of the elbow is realized.
Drawings
FIG. 1 is a schematic view of a turn-fin serpentine tube bender in accordance with the present invention;
FIG. 2 is an enlarged view of a portion of the mold section of FIG. 1 (with the composite tubular body removed) shown in relation to the upper and lower mold sections;
FIG. 3 is an enlarged partial view of the side thrust device portion of FIG. 1;
FIG. 4 is a schematic structural view of a rotary drive mechanism;
FIG. 5 is a schematic view of the tube gripping mechanism of FIG. 1;
FIG. 6 is a schematic view of a slider four bar mechanism of the side pushing mechanism of FIG. 1;
FIG. 7 is a schematic view of a slider four bar linkage of the opening and closing mechanism of FIG. 1;
fig. 8 is a schematic structural view of the composite pipe body.
In the figure: 1. the device comprises a machine table, 2, a swivel arm type workbench, 3, a spiral fin composite tube body, 4, a U-shaped elbow, 5, an upper and lower opening and closing tire mold, 6, a tube body clamping mechanism, 7, a side pushing device, 8, a side pushing moving seat, 9, a pushing guide plate, 10, a guide groove, 11, a side pushing material mechanism, 12, a pushing cylinder, 13, a rotation driving mechanism, 14, a lower mold, 15, an upper mold, 16, an opening and closing mechanism, 17, a semicircular cavity of the upper and lower opening and closing tire mold, 18, a translation sliding table, 19, a clamping ejector rod, 20, a semicircular cavity of a clamping ejector rod head, 21, a parallel four-bar mechanism, 22, a clamping cylinder, 23, a traction connecting rod, 24, a side pushing material mechanism, 25, a side pushing cylinder, 26, a hollow rotating shaft, 27, a sprocket transmission mechanism, 28, a traction cylinder, 29, a chain, 30, an upper and lower moving rod, 31, a slider four-bar mechanism of the opening and closing mechanism, 32, an opening and closing cylinder, 33, a reinforcing rod, 34, a block, 35, a top and rear clamping device, 36, a spiral fin, 39, a tensioning device and a chain.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1:
referring to fig. 1 to 8, an embodiment of a coiled tube bender for helical fins according to the present invention comprises a machine table 1, a rotary arm type working table 2 rotatably disposed at the front end of the machine table 1, a pushing and moving seat 8 disposed on the rotary arm type working table 2 and located at the rotation center position of the rotary arm type working table 2, a vertical opening and closing die 5 for bending a U-shaped elbow 4 on a coiled fin composite tube body 3, a tube clamping mechanism 6 disposed on the rotary arm type working table 2 for pressing the composite tube body 3 on the vertical opening and closing die 5, a side pushing device 7 disposed on the machine table 1 for leaning against the side edge of the composite tube body 3 and performing side pushing and assisting force, wherein the side pushing and moving seat 7 comprises a pushing and moving seat 9 disposed on the side pushing and moving seat 8 and capable of moving along the front and rear direction, a guide groove 10 for leaning against the side edge of the composite tube body 3 is disposed on the pushing and moving seat 8, the side pushing and moving seat 8 realizes the side pushing and moving seat 9 realizes the side pushing and pushing movement seat 9 realizes a certain rotation angle by a cylinder type pushing and pushing mechanism 13 through the side pushing and pushing mechanism 12.
Preferably, the up-down opening-closing die 5 includes a lower die 14 and an upper die 15, the upper die 15 is opened by a closing mechanism 16 by moving downward and upward relative to the lower die 15, and a semi-circular cavity 17 for positioning the composite tube 3 is formed on the side after the lower die 14 and the upper die 15 are closed.
And during bending, an integral bending method is adopted. Namely, a section of spiral fins 36 is sleeved on a long straight pipe 37 in advance, a neutral section 34 for bending an elbow is reserved between the spiral fins 36 at two adjacent ends, all the spiral fins 36 are welded to form a linear spiral fin composite pipe body 3, then the neutral section 34 on the spiral fin composite pipe body 3 is placed into an upper opening and closing tire mold 5 and clamped, the side face of the composite pipe body 3 is positioned in a guide groove 10 of a pushing guide plate 9, a rotary arm type workbench 2 is rotated to bend a U-shaped elbow 4, the composite pipe body 3 is loosened after bending, the composite pipe body turns 180 degrees around the axis of the straight pipe body, and the next U-shaped elbow 4 can be bent after clamping the composite pipe body 3 again, so that continuous bending of a spiral fin coiled pipe is realized.
The die for bending the pipe body is made into the up-down opening and closing moulding bed 5, the die can be opened rapidly after bending one elbow, the composite pipe body 3 can be conveniently turned 180 degrees around the axis of the straight pipe part and then axially shifted and clamped to the next neutral section 34 again to bend the next elbow, so that the continuous bending efficiency of the coiled pipe with the spiral fins is improved.
As a preferable scheme of the pipe body clamping mechanism in this embodiment, the pipe body clamping mechanism 6 includes a translation sliding table 18 movably disposed on the rotary arm type workbench 2, and a clamping ejector rod disposed on the translation sliding table 18, where a head of the clamping ejector rod 18 is disposed with a semi-circular cavity 20 for matching with the semi-circular cavity 17 of the upper and lower opening and closing tire mold 5; wherein the translation sliding table 18 translates through a parallel four-bar linkage 21, and the translation sliding table 18 is used as a parallel rod in the parallel four-bar linkage 21, and the parallel four-bar linkage 21 translates through a clamping cylinder 22 and a traction connecting rod 23 connected between the clamping cylinder 22 and a crank of the parallel four-bar linkage 21, and the translation sliding table 18 is used as a parallel rod.
The pipe body clamping mechanism 6 adopts a parallel four-bar mechanism 21, so that the head of the clamping ejector rod 19 can avoid interference with the bent part which is already bent in the moving process of clamping the pipe body.
As a preferable solution of the side pushing mechanism 11 in this embodiment, the side pushing mechanism 11 is a four bar linkage 24, the side pushing seat 8 is used as a slider in the four bar linkage 24 of the side pushing mechanism 11, and the four bar linkage 24 of the side pushing mechanism 11 realizes the lateral movement of the side pushing seat 8 by a side pushing cylinder 25 connected with a crank in the four bar linkage 24.
As a preferred scheme of the rotation driving mechanism in this embodiment, the rotation driving mechanism 13 includes a hollow rotating shaft 26 rotatably disposed at the rotation center of the rotary arm type table 2 and fixedly connected to the rotary arm type table 2, a sprocket driving mechanism 27 is disposed between the hollow rotating shaft 26 and the table 1, and the sprocket driving mechanism 27 pulls a chain 29 in the sprocket driving mechanism 27 to move through a traction cylinder 28 to realize rotation of the rotary arm type table 2.
The sprocket drive mechanism 27 is connected to the machine 1, and has a compact structure.
Further, as a preferable scheme of the opening and closing mechanism in this embodiment, the opening and closing mechanism 16 is a slider four-bar mechanism 31, an up-and-down moving rod 30 serving as a slider in the slider four-bar mechanism 31 is disposed in the hollow rotating shaft 26, the upper end of the up-and-down moving rod 30 is connected to the upper mold 15, and the slider four-bar mechanism 31 of the opening and closing mechanism 16 realizes the up-and-down movement of the up-and-down moving rod 30 through an opening and closing cylinder 32 connected with a crank in the slider four-bar mechanism 31.
Because the up-down moving rod 30 is arranged in the hollow rotating shaft 26, the structure is compact, and the up-down opening and closing distance can be very large, thereby greatly facilitating the transposition operation of the composite pipe body 3 in the bending process and improving the bending efficiency.
As a further improvement, in the spiral fin coiled pipe bender of this embodiment, a detachable reinforcing rod 33 is further sleeved on the outer circle of the top end of the up-down moving rod 30, and the other end of the reinforcing rod 33 is fixedly arranged on the machine table 1.
By connecting the reinforcing rod 33 on the outer circle of the top end of the up-down moving rod 30, the stress deformation of the cantilever part at the upper end of the up-down moving rod 30 is eliminated, and the reliability of positioning and clamping of the up-down opening and closing jig 5 is improved.
As a further improvement, a heading back clamping device 35 for clamping the non-spiral-fin neutral section 34 on the spiral-fin composite tube body 3 is further arranged at the rear end part of the side pushing device 7.
The pushing force can be increased by arranging the upsetting rear clamping device 35, so that the bending quality of the small-bending circular arc radius composite pipe body 3 is ensured.
In this embodiment, an angle encoder for detecting the rotation angle of the swivel-arm-type table 2 is disposed on the hollow rotating shaft 26.
Through setting up the angle encoder, the control system of cooperation bending machine can accurate control rocking arm formula workstation turned angle, realizes the accurate bending of elbow.
Preferably, the control system is a PLC control system.
Example 2:
a method for manufacturing a turn-fin coil using the turn-fin coil bender of example 1, comprising the steps of:
(1) Prefabricated composite pipe body 3: sleeving a plurality of sections of spiral fins 36 on the outer circle of a straight pipe 37, and reserving a neutral section for bending a U-shaped elbow 4 between two adjacent sections of spiral fins 36, wherein the spiral fins 36 are welded and fixed with the straight pipe 37 to form a composite pipe body 3 formed by welding the spiral fins 36 and the straight pipe 37;
(2) And (3) feeding: placing the composite pipe body 3 on a pipe bending machine, so that a first neutral gear section 34 on the composite pipe body 3 is positioned on an upper and lower opening and closing moulding bed 5 arranged on a rotary arm type workbench 2, and a part of the composite pipe body 3 positioned at the rear end of the first neutral gear section 34 is arranged on the machine table 1;
(3) Clamping: the pipe body clamping mechanism 6 on the rotary arm type workbench 2 is driven to press and fix the neutral gear section 34 part positioned on the upper and lower opening and closing moulding bed 5 on the composite pipe body 3;
(4) The composite pipe body is flat: the side pushing and pressing mechanism 11 is arranged on the driving machine table 2, and the side pushing and pressing mechanism 11 pushes the side pushing and pressing moving seat 8 of the side pushing and pressing device 7 to transversely move, so that the guide groove 10 of the pushing and pressing guide plate 9 on the side pushing and pressing moving seat 8 is flat with the side edge of the composite pipe body 3;
(5) Bending: the rotary arm type workbench is driven to rotate 2, and the rotary arm type workbench 2 drives the part of the composite pipe body 3, which is positioned at the front end of the upper and lower opening and closing moulding bed 5, of the composite pipe body 3 to rotate to a certain angle together to form a U-shaped elbow 4; when the rotary arm type workbench 2 rotates, a pushing cylinder 12 arranged on a side pushing moving seat 8 of the side pushing device 7 acts, so that a pushing guide plate 9 and a composite pipe body 3 positioned in a guide groove 10 of the pushing guide plate 9 move forwards together to form side pushing assistance;
(6) Loosening: the pipe body clamping mechanism 6 is loosened, the side pushing and pressing mechanism is loosened 11, the upper and lower opening and closing moulding bed 5 is loosened, and the pushing cylinder 12 is retracted;
(7) And (3) unloading: pulling out the composite pipe body 3 forwards from the upper and lower opening and closing moulding bed 5 for a section, and enabling the part of the composite pipe body 3 with the bent front end to rotate and turn over 180 degrees around the axis of the composite pipe body 3 with the unbent rear end;
(8) Resetting the rotary arm type workbench: the rotary arm type workbench 2 rotates reversely to reset;
(9) Composite tube reinstallation positioning: positioning a next neutral section 34 of the composite pipe body 3 on an upper and lower opening and closing moulding bed 5 arranged on a rotary arm type workbench 2, and enabling a part of the composite pipe body 3 positioned at the rear end of the next neutral section 34 to be positioned on the workbench 2;
(10) The steps (3) to (9) are repeatedly and circularly carried out until all the U-shaped elbows 4 are completely bent.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (5)
1. The spiral fin coiled pipe bender is characterized by comprising a machine table, a rotary arm type workbench rotatably arranged at the front end of the machine table, an up-and-down opening and closing die for bending a U-shaped elbow on a spiral fin composite pipe body, a pipe body clamping mechanism arranged on the rotary arm type workbench and used for pressing the composite pipe body on the up-and-down opening and closing die, and a side pushing device arranged on the machine table and used for leaning against the side edge of the composite pipe body and performing side pushing assistance, wherein the side pushing device comprises a side pushing moving seat capable of transversely moving relative to the front-and-back direction of the machine table, a pushing guide plate arranged on the side pushing moving seat and capable of moving along the front-and-back direction, a guide groove used for leaning against the side edge of the composite pipe body is arranged on the pushing guide plate, the side pushing moving seat is transversely moved through a side pushing material mechanism, the pushing guide plate is longitudinally moved back and forth through a cylinder, and the rotary arm type workbench is rotated at a certain angle through a rotary driving mechanism;
the upper die realizes downward movement, involution and upward movement opening relative to the lower die through an opening and closing mechanism, and a semicircular cavity for positioning the composite pipe body is formed on the side surface after the lower die and the upper die are involuted;
the pipe body clamping mechanism comprises a translation sliding table movably arranged on the rotary arm type workbench and a clamping ejector rod arranged on the translation sliding table, wherein the head part of the clamping ejector rod is provided with a semicircular cavity which is used for being matched with the semicircular cavity of the upper and lower opening and closing jig mould; the parallel four-bar mechanism realizes the translation of the translation sliding table serving as a parallel rod through a clamping cylinder and a traction connecting rod connected between the clamping cylinder and a crank of the parallel four-bar mechanism;
the side pushing mechanism is a sliding block four-bar mechanism, the side pushing movable seat is used as a sliding block in the sliding block four-bar mechanism of the side pushing mechanism, and the sliding block four-bar mechanism of the side pushing mechanism realizes the transverse movement of the side pushing movable seat through a side pushing cylinder connected with a crank in the sliding block four-bar mechanism;
the rotary driving mechanism comprises a hollow rotating shaft which is rotatably arranged at the rotating center of the rotary arm type workbench and fixedly connected with the rotary arm type workbench, a chain wheel transmission mechanism is arranged between the hollow rotating shaft and the workbench, and the chain wheel transmission mechanism pulls a chain in the chain wheel transmission mechanism to move through a traction cylinder so as to realize the rotation of the rotary arm type workbench;
the opening and closing mechanism is a sliding block four-bar mechanism, an up-and-down moving rod serving as a sliding block in the sliding block four-bar mechanism is arranged in the hollow rotating shaft, the upper end of the up-and-down moving rod is connected with the upper die, and the sliding block four-bar mechanism of the opening and closing mechanism realizes up-and-down movement of the up-and-down moving rod through an opening and closing cylinder connected with a crank in the sliding block four-bar mechanism.
2. The helical fin coil bender according to claim 1, wherein the outer circle of the top end of the up-down moving rod is further sleeved with a detachable reinforcing rod, and the other end of the reinforcing rod is fixedly arranged on the machine table.
3. A coiled tube bender for helical fins according to claim 1, wherein a back end of the side pushing device is further provided with a back-upsetting clamp device for clamping the neutral section without helical fins on the composite tube body of helical fins.
4. A turn-fin serpentine tube bender according to claim 1, wherein said hollow shaft is provided with an angle encoder for detecting the rotation angle of said rotary arm type table.
5. A method of bending a helical fin coil bender as claimed in any one of claims 1 to 4, comprising the steps of, in order:
(1) Prefabricating a composite pipe body: sleeving a plurality of sections of spiral fins on the outer circle of the straight pipe, and reserving a neutral section for bending the U-shaped elbow between two adjacent sections of spiral fins, wherein the spiral fins are welded and fixed with the straight pipe to form a composite pipe body formed by welding the spiral fins and the straight pipe;
(2) And (3) feeding: placing the composite pipe body on a pipe bending machine, so that a first neutral gear section on the composite pipe body is positioned on an up-and-down opening and closing tire mold arranged on a rotary arm type workbench, and a composite pipe body part positioned at the rear end of the first neutral gear section is placed on the machine;
(3) Clamping: driving a pipe body clamping mechanism on the rotary arm type workbench to tightly press and fix a neutral gear section part positioned on the upper and lower opening and closing moulding bed on the composite pipe body;
(4) The composite pipe body is flat: the side pushing and pressing mechanism is arranged on the driving machine and pushes the side pushing and moving seat of the side pushing device to transversely move, and the guide groove of the pushing guide plate on the side pushing and moving seat is enabled to be flat with the side edge of the composite pipe body;
(5) Bending: the rotary arm type workbench is driven to rotate, and drives the composite pipe body part on the front end of the upper and lower opening and closing moulding bed on the composite pipe body to rotate to a certain angle together to form a U-shaped elbow; when the rotary arm type workbench rotates, a pushing cylinder arranged on a side pushing moving seat of the side pushing device acts, so that a pushing guide plate and a composite pipe body positioned in a guide groove of the pushing guide plate move forwards together to form side pushing assistance;
(6) Loosening: the pipe body clamping mechanism is loosened, the side pushing material mechanism is loosened, the upper and lower opening and closing moulding bed is loosened, and the pushing cylinder is retracted;
(7) And (3) unloading: pulling out the composite pipe forwards from the upper and lower opening and closing moulding bed for a section, and enabling the part of the composite pipe with the bent front end to rotate and turn over 180 degrees around the axis of the part of the composite pipe with the unbent rear end;
(8) Resetting the rotary arm type workbench: the rotary arm type workbench rotates in the opposite direction for resetting;
(9) Composite tube reinstallation positioning: positioning the next neutral gear section of the composite pipe body on an upper and lower opening and closing tire mold arranged on a rotary arm type workbench, and enabling the composite pipe body part positioned at the rear end of the next neutral gear section to be positioned on the workbench;
(10) And (3) repeating the steps (3) to (9) until all the U-shaped elbows are bent completely.
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| CN201910728828.1A CN110394386B (en) | 2019-08-08 | 2019-08-08 | Spiral fin coiled pipe bending machine and spiral fin coiled pipe manufacturing method |
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| CN110394386B true CN110394386B (en) | 2023-12-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112775234A (en) * | 2020-11-30 | 2021-05-11 | 佛山市天箭机械设备有限公司 | Continuous pipe bending machine with overturning function |
| CN114011921A (en) * | 2021-10-28 | 2022-02-08 | 江阴市宏业机械制造有限公司 | Automatic pipe bender and pipe bending method for coiled pipes arranged in front and at back of left-right rotating unit |
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