CN114653826A - Production device and production method for large-diameter metal seamless bent pipe - Google Patents
Production device and production method for large-diameter metal seamless bent pipe Download PDFInfo
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- CN114653826A CN114653826A CN202210401730.7A CN202210401730A CN114653826A CN 114653826 A CN114653826 A CN 114653826A CN 202210401730 A CN202210401730 A CN 202210401730A CN 114653826 A CN114653826 A CN 114653826A
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
- B21D3/05—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
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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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a large-diameter metal seamless bent pipe production device, which comprises a fixed seat and a straightening seat, wherein a guide rod is arranged between the fixed seat and the straightening seat, a feeding mechanism for driving a workpiece to move is arranged between the guide rods, a straightening structure is arranged inside the straightening seat, a heating coil is arranged at the discharge end of the straightening seat, and a water spray hole is formed in the surface of the heating coil facing the workpiece; the mounting seat of the pipe bending device is provided with a sliding plate in a sliding manner, the sliding plate is provided with a rotary table, the rotary table is connected with a rotary arm through a clamping sleeve, and the end of the rotary arm close to the workpiece is provided with a clamping head for clamping the workpiece. The invention also discloses a production method of the large-caliber metal seamless bent pipe production device. By adopting the production device and the production method of the large-caliber metal seamless bent pipe, the problems that the existing large-caliber metal seamless bent pipe is difficult to prepare and difficult to control the shape and the size stability can be solved; the method has the advantages of good surface quality of the bent pipe and accurate geometric dimension.
Description
Technical Field
The invention relates to the technical field of seamless bent pipe production, in particular to a production device and a production method of a large-caliber metal seamless bent pipe.
Background
The bent pipe is a common pipeline in conveying equipment and pipelines, the conventional bent pipe is generally produced in a welding mode, the bent pipe is welded with other pipelines during assembly, a cross-shaped welding seam is easily formed at a joint, and the strength and the sealing performance of the joint are influenced by the cross-shaped welding seam. The seamless bent pipe can effectively avoid the generation of cross-shaped welding seams. However, the preparation of the large-caliber metal seamless bent pipe is difficult, and the shape and the dimensional stability of the bent pipe are difficult to control.
Disclosure of Invention
The invention aims to provide a production device of a large-caliber metal seamless bent pipe, which solves the problems that the existing large-caliber metal seamless bent pipe is difficult to prepare and difficult to control the shape and size stability. The invention also aims to provide a production method of the large-caliber metal seamless bent pipe production device.
In order to achieve the purpose, the invention provides a large-diameter metal seamless bent pipe production device which comprises a feeding device and a bent pipe device, wherein the feeding device comprises a fixed seat and a straightening seat, a guide rod is arranged between the fixed seat and the straightening seat, a feeding mechanism for driving a workpiece to move is arranged between the guide rods, a straightening structure is arranged inside the straightening seat, a heating coil is arranged at the discharge end of the straightening seat, the heating coil is sleeved outside the workpiece, and a water spray hole is formed in the surface of the heating coil facing the workpiece; the pipe bending device comprises a mounting seat, a sliding plate is arranged on the mounting seat in a sliding mode, a rotary table is arranged on the sliding plate and connected with a rotary arm through a clamping sleeve, and a clamping head for clamping the workpiece is arranged on the end, close to the workpiece, of the rotary arm.
Preferably, the feeding mechanism comprises a sliding seat, two sides of the sliding seat are erected on the guide rod and are in sliding connection with the guide rod, a power element for driving the sliding seat to slide on the guide rod is arranged on the fixed seat, and a through hole for allowing a workpiece to pass through is formed in the middle of the sliding seat; the through hole is provided with a clamping structure for clamping a workpiece, the clamping structure comprises an upper clamping plate and a lower clamping plate, the lower clamping plate is arranged on a telescopic rod of a first cylinder, the first cylinder is fixed on a sliding seat, the upper clamping plate is rotatably arranged at the end of a lead screw, the lead screw is in threaded connection with an installation block arranged on the sliding seat, and the top end of the lead screw is provided with a turntable and a handle.
Preferably, the power element is a first hydraulic cylinder, and telescopic rods of the first two hydraulic cylinders are respectively arranged on two sides of the sliding seat; the middle part of the fixed seat is provided with a through hole for the workpiece to pass through.
Preferably, the two sides of the sliding seat are fixedly provided with connecting lugs, the connecting lugs are rotatably provided with a first guide wheel, and the first guide wheel is positioned above the guide rod and is in contact with the guide rod; and a second guide wheel is arranged below the connecting lug, is rotatably connected with the sliding seat and is positioned on the inner side of the guide rod and is in contact with the guide rod.
Preferably, the straightening structure comprises a dumbbell-shaped straightening roller, a through hole for the workpiece to pass through is formed in the middle of the straightening seat, and the straightening rollers are rotatably arranged on two sides of the through hole.
Preferably, the feeding end of the straightening seat is provided with a supporting rod, the supporting rod is located below the workpiece, and the supporting rod is arranged on the ground through an air cylinder.
Preferably, the mounting seat is provided with a second hydraulic cylinder for driving the sliding plate to slide on the mounting seat, guide rails are arranged on two sides of the mounting seat, guide grooves matched with the guide rails are arranged on the sliding plate, and the guide grooves are sleeved on the guide rails and are in sliding connection with the guide rails.
Preferably, the clamping sleeve comprises two arc-shaped clamping plates, one ends of the clamping plates are hinged, and the other ends of the clamping plates are connected through bolts.
The production method of the large-caliber metal seamless bent pipe production device comprises the following steps:
s1, enabling the workpiece to penetrate through a through hole in the middle of the fixed seat, the sliding seat and the straightening seat, enabling the end of the workpiece to penetrate through the straightening wheels on the two sides, sleeving the heating coil on the end of the workpiece, rotating the screw rod through the handle to enable the upper clamping plate to be in contact with the workpiece, driving the lower clamping plate to ascend through the cylinder I, enabling the lower clamping plate to be in contact with the workpiece, and clamping and fixing the workpiece through the upper clamping plate and the lower clamping plate; the cylinder drives the supporting rod to rise to contact with the workpiece;
s2, adjusting the position of the sliding plate through a second hydraulic cylinder according to the diameter of the bent pipe; clamping a chuck at the end of a large rotary arm on a workpiece, and fixing the large rotary arm on a rotary table through a clamping sleeve;
s3, starting the medium-frequency induction heater, heating the workpiece through the heating coil, injecting cooling water into the heating coil by the water pump, and cooling the workpiece while heating by the heating coil; starting a first hydraulic cylinder, pushing the sliding seat to slide on the guide rod by the first hydraulic cylinder so as to drive the workpiece to move, and bending the workpiece under the action of the large rotary arm;
s4, cutting the bent pipe through a cutting device after the workpiece is bent to meet the requirement; repeating S2-S4.
Preferably, the outer diameter of the elbow is 610-1400 mm; in step S3, the heating temperature of carbon steel and low-carbon steel is 650-; the temperature of the cooling water is less than 40 ℃.
The production device and the production method of the large-caliber metal seamless bent pipe have the advantages and positive effects that:
1. the straightening seat is provided with the straightening roller, and the workpiece is straightened by the straightening roller before being bent, so that the bending effect of the workpiece is improved.
2. The workpiece is locally heated by the heating coil and is cooled by cooling water during heating, so that the bending surface forming effect and the size precision of the workpiece are improved.
3. The movable sliding plate is arranged on the mounting seat, the position of the sliding plate can be adjusted as required, the rotary table is arranged on the sliding plate and connected with the rotary arm through the clamping sleeve, the length of the rotary arm can be adjusted as required, and the production requirements of bent pipes with different bending radii can be met. The rotary arm is beneficial to improving the forming effect and the size precision of the workpiece.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a large-caliber metal seamless elbow production device and a production method of the invention;
FIG. 2 is a schematic top view of a feeding mechanism of an embodiment of a production apparatus and a production method for a large-diameter seamless metal elbow pipe according to the present invention;
FIG. 3 is a schematic view of a front view structure of a feeding mechanism in an embodiment of a production device and a production method for a large-caliber metal seamless elbow pipe according to the present invention;
FIG. 4 is a schematic structural diagram of a straightening seat in front view according to an embodiment of a production device and a production method for a large-caliber metal seamless bent pipe of the invention;
FIG. 5 is a schematic diagram of a coil structure of an embodiment of a large-caliber metal seamless elbow production device and a production method of the invention.
Reference numerals
1. A fixed seat; 2. a straightening seat; 3. a guide bar; 4. a first hydraulic cylinder; 5. a slide base; 6. a workpiece; 7. a supporting base; 8. a support bar; 9. a heating coil; 10. a mounting seat; 11. a slide plate; 12. a turntable; 13. a clamping sleeve; 14. a swivel arm; 15. clamping a head; 16. a second hydraulic cylinder; 17. connecting lugs; 18. a first guide wheel; 19. a second guide wheel; 20. an upper splint; 21. a turntable; 22. a handle; 23. a screw rod; 24. mounting blocks; 25. a lower splint; 26. a first cylinder; 27. a straightening roll; 28. and (4) water spray holes.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Examples
Fig. 1 is a schematic structural diagram of a large-caliber metal seamless elbow production device and a production method according to an embodiment of the invention. As shown in the figure, the production device for the large-diameter metal seamless bent pipe comprises a feeding device and a pipe bending device, wherein the pipe bending device is positioned on one side of the end head of a discharge hole of the feeding device. The feeding device comprises a fixed seat 1 and a straightening seat 2, and the fixed seat 1 and the straightening seat 2 are both fixedly arranged on the ground. And two guide rods 3 are arranged between the fixed seat 1 and the straightening seat 2, and two ends of each guide rod 3 are fixedly connected with the fixed seat 1 and the straightening seat 2 respectively.
Fig. 2 is a schematic top view structure diagram of a feeding mechanism in an embodiment of a production device and a production method for a large-caliber metal seamless elbow pipe of the invention, and fig. 3 is a schematic front view structure diagram of a feeding mechanism in an embodiment of a production device and a production method for a large-caliber metal seamless elbow pipe of the invention. As shown in the figure, a feeding mechanism for driving the workpiece 6 to move is arranged between the guide rods 3. The feeding mechanism comprises a sliding seat 5, and two sides of the sliding seat 5 are erected on the guide rod 3 and are in sliding connection with the guide rod 3. The fixed seat 1 is provided with a power element for driving the sliding seat 5 to slide on the guide rod 3, the power element is a hydraulic cylinder I4, and the hydraulic cylinder I4 is fixed on the fixed seat 1. Pneumatic cylinder 4 is fixed subaerial through the supporting seat, improves the stability of pneumatic cylinder 4. The telescopic rods of the two hydraulic cylinders I4 are respectively arranged on two sides of the sliding seat 5, so that the stability of pushing the sliding seat 5 is improved. The middle part of the fixed seat 1 is provided with a through hole for the workpiece 6 to pass through, and the aperture of the through hole is larger than the outer diameter of the workpiece 6.
The two sides of the sliding seat 5 are fixedly provided with connecting lugs 17, the connecting lugs 17 are rotatably provided with transverse guide wheels I18, and the guide wheels I18 are positioned above the guide rods 3 and are in contact with the guide rods 3. The first guide wheel 18 has a supporting function on the whole sliding seat 5, and can reduce the friction force between the connecting lug 17 and the guide rod 3, so that the sliding seat 5 can slide conveniently. A second vertical guide wheel 19 is arranged below the connecting lug 17, and the second guide wheel 19 is rotatably connected with the sliding seat 5. The second guide wheel 19 is positioned on the inner side of the guide rod 3 and is in contact with the guide rod 3, and the second guide wheel 19 has guiding and limiting effects on the sliding of the sliding seat 5 and can reduce the sliding friction force.
The middle part of the sliding seat 5 is provided with a through hole for the workpiece 6 to pass through, and the aperture of the through hole is larger than the outer diameter of the workpiece 6. The through hole is provided with a clamping structure for clamping the workpiece 6. The clamping structure comprises an upper clamping plate 20 and a lower clamping plate 25, wherein the lower clamping plate 25 is arranged on an expansion link of a first air cylinder 26, and the first air cylinder 26 is fixed on the sliding seat 5. The upper clamping plate 20 is rotatably arranged on the end of a screw rod 23, and the screw rod 23 is in threaded connection with a mounting block 24 arranged on the sliding seat 5. The top end of the screw 23 is provided with a turntable 21 and a handle 22 which are convenient for the screw 23 to rotate. The screw rod 23 is rotated through the turntable 21 and the handle 22, and the screw rod 23 is in threaded connection with the mounting block 24, so that the upper clamping plate 20 is driven to move downwards; the first air cylinder 26 drives the lower clamping plate 25 to move upwards, so that the workpiece 6 is clamped and fixed with the sliding seat 5 through the upper clamping plate 20 and the lower clamping plate 25.
The slide 5 is driven to slide on the guide rod 3 by extending the hydraulic cylinder I4, so that the slide 5 drives the workpiece 6 to move, and the purpose of feeding is achieved.
FIG. 4 is a schematic front view of a straightening seat in an embodiment of a production device and a production method for a large-caliber metal seamless bent pipe. As shown in the figure, the straightening structure is arranged inside the straightening seat 2. The middle part of the straightening seat 2 is provided with a through hole for the workpiece 6 to pass through, and the aperture of the through hole is larger than the outer diameter of the workpiece 6. The straightening structure comprises dumbbell-shaped straightening rollers 27, and the straightening rollers 27 are rotatably arranged on two sides of the through hole. The straightening rollers 27 are provided in at least one set, and in the present embodiment, there are three straightening rollers 27. In order to improve the straightening and guiding effect on the workpiece 6, the lower part of the through hole is rotatably provided with a straightening roller 27, and the lower straightening roller 27 has the supporting function on the workpiece 6.
The feeding end of the straightening seat 2 is provided with a supporting rod 8, and the supporting rod 8 is positioned below the workpiece 6. The supporting rod 8 is arranged on the ground through the air cylinder, and the air cylinder is used for adjusting the height of the supporting rod 8, so that the workpiece 6 is supported, and the workpiece 6 smoothly enters the straightening seat 2.
FIG. 5 is a schematic diagram of a coil structure of an embodiment of a large-caliber metal seamless elbow production device and a production method of the invention. As shown in the figure, a heating coil 9 is arranged at the discharging end of the straightening seat 2, the heating coil 9 is a copper pipe, and cooling water flows in the heating coil 9. The heating coil 9 is sleeved outside the workpiece 6, and a plurality of water spray holes 28 are uniformly arranged on the surface of the heating coil 9 facing the workpiece 6. The heating coil 9 is connected with the medium-frequency induction heater, and the workpiece 6 is heated by the heating coil 9, so that the workpiece 6 is convenient to deform; the cooling water in the heating coil 9 is sprayed to the workpiece 6 through the water spray holes 28 to cool the workpiece 6, thereby improving the molding effect of the surface of the workpiece 6.
The pipe bending device comprises a mounting seat 10, and the mounting seat 10 is fixed on the ground. The mounting seat 10 is provided with a sliding plate 11 in a sliding manner. The mounting seat 10 is provided with a second hydraulic cylinder 16 for driving the sliding plate 11 to slide on the mounting seat 10, an expansion link of the second hydraulic cylinder 16 is connected with the sliding plate 11, and the second hydraulic cylinder 16 drives the sliding plate 11 to slide on the mounting seat 10 so as to adapt to the production requirements of bent pipes with different bending radii. Guide rails are arranged on two sides of the mounting seat 10, a guide groove matched with the guide rails is arranged on the sliding plate 11, and the guide groove is sleeved on the guide rails and is in sliding connection with the guide rails.
The sliding plate 11 is provided with a rotary table 12, and the rotary table 12 is rotatably connected with the sliding plate 11 through a bearing. The rotary table 12 is fixedly provided with a clamping sleeve 13, and the rotary table 12 is connected with a rotary arm 14 through the clamping sleeve 13. The clamping sleeve 13 comprises two arc-shaped clamping plates, one ends of the clamping plates are hinged, the other ends of the clamping plates are connected through bolts, so that the installation and the disassembly of the rotary arm 14 are facilitated, and the length of the connection between the rotary arm 14 and the workpiece 6 can be adjusted according to needs.
The end of the swivel arm 14 close to the workpiece 6 is provided with a chuck 15 for clamping the workpiece 6. The clamping head 15 comprises two arc-shaped clamping plates, one ends of the clamping plates are hinged, and the other ends of the clamping plates are connected through bolts, so that the clamping head 15 can clamp the workpiece 6 conveniently. One of which is fixed to the swivel arm 14.
The production method of the large-caliber metal seamless bent pipe production device comprises the following steps:
s1, enabling the workpiece 6 to penetrate through a through hole in the middle of the fixed seat 1, the sliding seat 5 and the straightening seat 2, enabling the end of the workpiece 6 to penetrate through the straightening wheels on the two sides, enabling the heating coil 9 to be sleeved on the end of the workpiece 6, enabling the upper clamping plate 20 to be in contact with the workpiece 6 by rotating the screw rod 23 through the handle 22, enabling the lower clamping plate 25 to be driven by the air cylinder I26 to ascend, enabling the lower clamping plate 25 to be in contact with the workpiece 6, and enabling the upper clamping plate 20 and the lower clamping plate 25 to clamp and fix the workpiece 6; the cylinder drives the supporting rod 8 to ascend to be in contact with the workpiece 6.
S2, adjusting the position of the sliding plate 11 through the second hydraulic cylinder 16 according to the diameter of the bent pipe; the clamping head 15 at the end of the large rotary arm is clamped on the workpiece 6, and the large rotary arm is fixed on the rotary table 12 through the clamping sleeve 13.
S3, starting the medium-frequency induction heater, heating the workpiece 6 through the heating coil 9, injecting cooling water into the heating coil 9 by the water pump, and cooling the workpiece 6 while heating by the heating coil 9; starting a hydraulic cylinder I4, pushing a sliding seat 5 to slide on the guide rod 3 by the hydraulic cylinder I4 so as to drive a workpiece 6 to move, and bending the workpiece 6 under the action of a large rotary arm; the thickest point of the pipe wall of the workpiece 6 is placed on the outer arc of the bent pipe.
S4, cutting the bent pipe through a cutting device after the workpiece 6 is bent to meet the requirement; repeating S2-S4.
The production device is applied to the production of the bent pipe with the outer diameter of 610-1400 mm. The outer diameter of the finished bent pipe is the same as that of the raw material straight pipe of the workpiece 6.
The dimensional comparison of the straight pipe raw material workpiece 6 and the production bent pipe is shown in table 1.
TABLE 1 comparison table of sizes of straight pipe raw material workpiece 6 and production bent pipe
| Raw materials | φ610 | φ711 | φ813 | φ914 | φ1016 | φ1219 | φ1422 |
| Finished bent pipe | φ610 | φ711 | φ813 | φ914 | φ1016 | φ1219 | φ1422 |
In step S3, the heating temperature of the heating coil 9 is detected by an infrared ray meter, the heating temperature is different for different materials of the workpiece 6, and the temperature of the cooling water in the heating coil 9 is less than 40 ℃. The relationship between the material of the workpiece 6 and the heating temperature and the advancing speed is shown in table 2.
TABLE 2 correlation of workpiece 6 material with heating temperature and advance speed
δ is the wall thickness of the workpiece 6.
Therefore, the production device and the production method for the large-caliber metal seamless bent pipe can solve the problems that the existing large-caliber metal seamless bent pipe is difficult to prepare and difficult to control the shape and the size stability; the pipe bending machine has the advantages of good surface quality of the bent pipe, smooth transition, stable control of the circumference of the end part of the caliber and accurate geometric dimension.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a seamless return bend apparatus for producing of heavy-calibre metal which characterized in that: the automatic pipe bending machine comprises a feeding device and a pipe bending device, wherein the feeding device comprises a fixed seat and a straightening seat, a guide rod is arranged between the fixed seat and the straightening seat, a feeding mechanism for driving a workpiece to move is arranged between the guide rods, a straightening structure is arranged inside the straightening seat, a discharging end of the straightening seat is provided with a heating coil, the heating coil is sleeved outside the workpiece, and a water spray hole is formed in the surface of the heating coil facing the workpiece; the pipe bending device comprises a mounting seat, a sliding plate is arranged on the mounting seat in a sliding mode, a rotary table is arranged on the sliding plate and connected with a rotary arm through a clamping sleeve, and a clamping head for clamping the workpiece is arranged on the end, close to the workpiece, of the rotary arm.
2. The production device for the large-caliber metal seamless bent pipe according to claim 1, characterized in that: the feeding mechanism comprises a sliding seat, two sides of the sliding seat are erected on the guide rod and are in sliding connection with the guide rod, a power element for driving the sliding seat to slide on the guide rod is arranged on the fixed seat, and a through hole for enabling a workpiece to pass through is formed in the middle of the sliding seat; the through hole is provided with a clamping structure for clamping a workpiece, the clamping structure comprises an upper clamping plate and a lower clamping plate, the lower clamping plate is arranged on a telescopic rod of a first cylinder, the first cylinder is fixed on a sliding seat, the upper clamping plate is rotatably arranged at the end of a lead screw, the lead screw is in threaded connection with an installation block arranged on the sliding seat, and the top end of the lead screw is provided with a turntable and a handle.
3. The production device for the large-caliber metal seamless bent pipe according to claim 2, characterized in that: the power element is a first hydraulic cylinder, and telescopic rods of the first two hydraulic cylinders are respectively arranged on two sides of the sliding seat; the middle part of the fixed seat is provided with a through hole for the workpiece to pass through.
4. The large-caliber metal seamless elbow production device according to claim 2, wherein: the two sides of the sliding seat are fixedly provided with connecting lugs, a first guide wheel is rotatably arranged on the connecting lugs, and the first guide wheel is positioned above the guide rod and is in contact with the guide rod; and a second guide wheel is arranged below the connecting lug, is rotatably connected with the sliding seat and is positioned on the inner side of the guide rod and is in contact with the guide rod.
5. The large-caliber metal seamless elbow production device according to claim 1, wherein: the straightening structure comprises a dumbbell-shaped straightening roller, a through hole for a workpiece to pass through is formed in the middle of the straightening seat, and the straightening roller is rotatably arranged on two sides of the through hole.
6. The large-caliber metal seamless elbow production device according to claim 1, wherein: the feeding end of the straightening seat is provided with a supporting rod, the supporting rod is located below a workpiece, and the supporting rod is arranged on the ground through an air cylinder.
7. The large-caliber metal seamless elbow production device according to claim 1, wherein: the mounting seat is provided with a second hydraulic cylinder for driving the sliding plate to slide on the mounting seat, guide rails are arranged on two sides of the mounting seat, guide grooves matched with the guide rails are formed in the sliding plate, and the guide grooves are sleeved on the guide rails and are in sliding connection with the guide rails.
8. The large-caliber metal seamless elbow production device according to claim 1, wherein: the clamping sleeve comprises two arc-shaped clamping plates, one ends of the clamping plates are hinged, and the other ends of the clamping plates are connected through bolts.
9. The production method of the large-caliber metal seamless elbow production device according to any one of the claims 1 to 8, characterized by comprising the following steps:
s1, enabling the workpiece to penetrate through a through hole in the middle of the fixed seat, the sliding seat and the straightening seat, enabling the end of the workpiece to penetrate through the straightening wheels on the two sides, sleeving the heating coil on the end of the workpiece, rotating the screw rod through the handle to enable the upper clamping plate to be in contact with the workpiece, driving the lower clamping plate to ascend through the cylinder I, enabling the lower clamping plate to be in contact with the workpiece, and clamping and fixing the workpiece through the upper clamping plate and the lower clamping plate; the cylinder drives the supporting rod to ascend to be in contact with the workpiece;
s2, adjusting the position of the sliding plate through a second hydraulic cylinder according to the diameter of the bent pipe; clamping a chuck at the end of a large rotary arm on a workpiece, and fixing the large rotary arm on a rotary table through a clamping sleeve;
s3, starting the medium-frequency induction heater, heating the workpiece through a heating coil, injecting cooling water into the heating coil by a water pump, and heating and cooling the workpiece by the heating coil; starting a first hydraulic cylinder, pushing the sliding seat to slide on the guide rod by the first hydraulic cylinder so as to drive the workpiece to move, and bending the workpiece under the action of the large rotary arm;
s4, cutting the bent pipe through a cutting device after the workpiece is bent to meet the requirement; repeating S2-S4.
10. The production method of the large-caliber metal seamless elbow production device according to claim 9, characterized in that: the outer diameter of the bent pipe is 610 mm and 1400 mm; in step S3, the heating temperature of carbon steel and low-carbon steel is 650-; the temperature of the cooling water is less than 40 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210401730.7A CN114653826A (en) | 2022-04-18 | 2022-04-18 | Production device and production method for large-diameter metal seamless bent pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210401730.7A CN114653826A (en) | 2022-04-18 | 2022-04-18 | Production device and production method for large-diameter metal seamless bent pipe |
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| CN202210401730.7A Pending CN114653826A (en) | 2022-04-18 | 2022-04-18 | Production device and production method for large-diameter metal seamless bent pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116174603A (en) * | 2023-03-15 | 2023-05-30 | 河北宾宏石化设备有限公司 | A kind of production equipment and production method of seamless metal elbow |
| CN118847832A (en) * | 2024-09-25 | 2024-10-29 | 南通众扬管业科技有限公司 | A kind of hot forming equipment for metal pipe fittings |
Citations (10)
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| JP2009012062A (en) * | 2007-07-06 | 2009-01-22 | Dai Ichi High Frequency Co Ltd | Metal pipe bending apparatus and method for manufacturing metal pipe with curved pipe section |
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| CN116174603A (en) * | 2023-03-15 | 2023-05-30 | 河北宾宏石化设备有限公司 | A kind of production equipment and production method of seamless metal elbow |
| CN118847832A (en) * | 2024-09-25 | 2024-10-29 | 南通众扬管业科技有限公司 | A kind of hot forming equipment for metal pipe fittings |
| CN118847832B (en) * | 2024-09-25 | 2024-11-29 | 南通众扬管业科技有限公司 | A kind of hot forming equipment for metal pipe fittings |
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Application publication date: 20220624 |