CN110722023B - Steel pipe straightening equipment and steel pipe straightening method - Google Patents
Steel pipe straightening equipment and steel pipe straightening method Download PDFInfo
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- CN110722023B CN110722023B CN201911168840.8A CN201911168840A CN110722023B CN 110722023 B CN110722023 B CN 110722023B CN 201911168840 A CN201911168840 A CN 201911168840A CN 110722023 B CN110722023 B CN 110722023B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 237
- 239000010959 steel Substances 0.000 title claims abstract description 237
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005452 bending Methods 0.000 claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000006698 induction Effects 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 12
- 230000009916 joint effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
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- 241000272814 Anser sp. Species 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 244000261422 Lysimachia clethroides Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000032258 transport Effects 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
- 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
- B21D3/14—Recontouring
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
本发明提供了一种钢管矫直设备及钢管矫直方法，其中，钢管矫直设备，包括：基体；第一辊子组件，设置在基体上并输送钢管；第二辊子组件，设置在基体上并位于输入辊子和输出辊子之间，加热装置，能够对钢管的弯曲处进行加热；第一施力装置，固定设置在基体上，第一施力装置的移动方向垂直于与钢管的输送方向，第一施力装置包括第一支架和可活动地设置在第一支架上的第一施力机构；第二施力装置，位于输出辊子远离输入辊子的一侧，钢管的弯曲处位于输出辊子和第二施力装置之间，在第一施力机构和第二施力装置共同作用下，钢管的弯曲处能够变形至伸直状态。本申请的技术方案有效解决了相关技术中的钢管因管端弯曲导致返切的问题。
The present invention provides a steel pipe straightening device and a steel pipe straightening method, wherein the steel pipe straightening device comprises: a base; a first roller assembly, which is arranged on the base and conveys the steel pipe; a second roller assembly, which is arranged on the base and located between the input roller and the output roller, a heating device, which can heat the bending part of the steel pipe; a first force device, which is fixedly arranged on the base, the moving direction of the first force device is perpendicular to the conveying direction of the steel pipe, the first force device comprises a first bracket and a first force mechanism movably arranged on the first bracket; the second force device is located on the side of the output roller away from the input roller, the bending part of the steel pipe is located between the output roller and the second force device, and under the joint action of the first force mechanism and the second force device, the bending part of the steel pipe can be deformed to a straight state. The technical solution of the present application effectively solves the problem of steel pipe back-cutting due to the bending of the pipe end in the related art.
Description
Technical Field
The invention relates to the field of metal processing, in particular to steel tube straightening equipment and a steel tube straightening method.
Background
The steel pipe straightening device can eliminate bending and radial deformation of the steel pipe in the rolling, heat treatment or transportation process. With the increasing demands of the market on the strength of steel pipes, high strength means that high deformation resistance is generated, which results in more and more difficult control of the straightness of the steel pipes.
The full length straightness of the steel pipe is mainly ensured by a multi-roller straightener, and the deformation resistance of the steel pipe with the strength of more than 1000MPa is reduced by temperature straightening (more than or equal to 580 ℃), so that the straightening effect is improved. The local bending of the steel pipe is effectively corrected by using a three-point pressure straightening method, but the three-point pressure straightening has the limitation of supporting distance, the closer the distance is selected, the larger the straightening resistance is, the less obvious the straightening effect is, and the greater the risk of damage to the pipe caused by indentation deformation of the steel pipe is. The current manner of controlling the bending of the ends of steel pipes is as follows:
For the multi-roller straightener, the roller spacing exists in the horizontal direction, when the length of the roller spacing exceeds the pipe end bending length, the pipe end bending cannot be effectively straightened, only the roller surface meshing of the upper roller and the lower roller can be used for slightly correcting, but the bending degree after straightening and discharging can rebound due to lack of straightening deflection, and the pipe end bending cannot be effectively straightened.
The pressure straightener belongs to equipment for straightening by utilizing the reverse bending spring return of a rolled piece, which is the same as the roller straightener. The pressure straightener mainly utilizes the three-point bending principle to perform effective straightening. However, three-point pressure straightening has the limitation of supporting distance, the nearer the distance is selected, the larger the straightening resistance is, the less obvious the straightening effect is, meanwhile, because the steel pipe is hollow, the distance of the bent shape of the pipe end of the steel pipe is shorter, generally 300mm-400mm, so that when the pipe end of the pressure straightener straightens the bent pipe end of the goose head, the pressure straightener can easily generate indentation on the steel pipe and leave a dent, thereby damaging the pipe. Thus, the pressure straightener cannot effectively straighten the pipe end goose head bend.
Therefore, the multi-roller straightener and the pressure straightener cannot effectively solve the bending defect of the gooseneck at the pipe end of the steel pipe. Due to the lack of effective correction means for the pipe end goose head bending, the steel pipe with the goose head bending facing the pipe end can only be subjected to pipe end cutting treatment. For the steel pipe with the length requirement of the specified size, the pipe end back cutting allowance has to be reserved in advance in order to ensure that the length after back cutting meets the requirement, so that the yield of materials can be affected, a large amount of manpower and material resources can be wasted, and the production efficiency is seriously affected.
Disclosure of Invention
The invention mainly aims to provide steel tube straightening equipment and a steel tube straightening method, which are used for solving the problem of back cutting of a steel tube caused by bending of the end of the steel tube in the related technology.
In order to achieve the above object, according to one aspect of the present invention, there is provided a steel pipe straightening apparatus comprising a base, a first roller assembly provided on the base and conveying a steel pipe, the first roller assembly including an input roller and an output roller, a second roller assembly provided on the base and located between the input roller and the output roller, the second roller assembly being capable of supporting the steel pipe in a vertical direction and driving the steel pipe to rotate about an axis of the steel pipe, a heating device capable of heating a bent portion of the steel pipe, a first urging device movably provided on the base, a moving direction of the first urging device being perpendicular to a conveying direction of the steel pipe, the first urging device including a first bracket and a first urging mechanism movably provided on the first bracket, and a second urging device located on a side of the output roller away from the input roller, the bent portion of the steel pipe being located between the output roller and the second urging device, the bent portion of the steel pipe being deformable to a straightened state under a combined action of the first urging mechanism and the second urging device.
Further, the first force application mechanism comprises a driving cylinder assembly and a clamping piece connected with the driving cylinder assembly, one end of the clamping piece is hinged with the first bracket, the clamping piece is hinged with the driving cylinder assembly, and a piston rod of the driving cylinder assembly is hinged with the first bracket.
Further, the first bracket comprises a first bracket body and an arc-shaped plate arranged on the first bracket body, and the clamping piece is arc-shaped.
Further, the base body comprises a rack and a foundation, the first force application device is arranged on the rack and is located above the first roller assembly, the first roller assembly and the second roller assembly are both arranged on the foundation, and the second force application device is arranged on the rack.
Further, the second force application device has the same structure as the first force application device.
Further, the base body comprises a foundation and a pedestal arranged on the foundation, the first force application device is arranged on the foundation and located below the first roller assembly, the first roller assembly and the second roller assembly are both arranged on the foundation, and the second force application device is arranged on the pedestal.
Further, the second force application device comprises a support and a sleeve detachably nested on the support, and the inner diameter of the sleeve is larger than the outer diameter of the steel pipe.
Further, the first force application device comprises a plurality of first force application devices which are arranged on the base body at intervals, and the second roller assembly comprises a second bracket which is movably arranged on the base body and a roller assembly which is rotatably connected to the second bracket.
Further, the steel tube straightening device further comprises a controller, the first force application device is connected with the controller, the heating device comprises a third support and an induction coil arranged on the third support, the induction coil is connected with the controller, and the induction coil is removably sleeved on the outer side of the bent part of the steel tube.
According to another aspect of the present invention, there is provided a steel pipe straightening method comprising the steps of feeding a bent portion of a steel pipe between a first urging means and a second urging means, rotating the steel pipe to bend the bent portion of the steel pipe in a horizontal direction or in a vertical direction, heating the bent portion of the steel pipe, fixing the steel pipe with the first urging means, urging the bent portion of the steel pipe with the second urging means, or restricting the bent portion of the steel pipe with the second urging means, and urging the steel pipe with the first urging means.
By applying the technical scheme of the application, the steel tube straightening equipment comprises a substrate, a first roller assembly, a second roller assembly, a heating device, a first force application device and a second force application device. A first roller assembly is disposed on the substrate and transports the steel tubing, the first roller assembly including an input roller and an output roller. The first roller assembly is capable of translating the steel tube after actuation. The second roller assembly is arranged on the base body and is positioned between the input roller and the output roller, and the second roller assembly can support the steel pipe along the vertical direction and drive the steel pipe to rotate around the axis of the steel pipe. The heating device can heat the bending part of the steel pipe so as to reduce straightening deformation resistance. The bending of the steel pipe is easy to deform under the condition of being pressed, and the phenomenon that the surface of the steel pipe is sunken in the related art is avoided. The first force application device is movably arranged on the base body. The moving direction of the first force application device is perpendicular to the conveying direction of the steel pipe. This facilitates matching the size of the steel pipe placed on the first roller assembly by adjusting the distance between the first force applying means and the first roller assembly. The first force application device comprises a first bracket and a first force application mechanism movably arranged on the first bracket. The second force application device is positioned at one side of the output roller far away from the input roller, the bending part of the steel tube is positioned between the output roller and the second force application device, and the bending part of the steel tube can be deformed to a straightening state under the combined action of the first force application mechanism and the second force application device. The steel pipe can firstly pass through the multi-roller straightener or the pressure straightener to adjust the overall straightness of the steel pipe, and then the bent part of the pipe end of the steel pipe which cannot be straightened by the multi-roller straightener or the pressure straightener is conveyed to be positioned between the output roller and the second force application device through the first roller assembly. Under the combined action of the first force application mechanism and the second force application device, the bent part of the steel pipe can be deformed to be in a straightened state. Therefore, the technical scheme of the application can make up the short plates with the pipe end bending and straightening capacity of the multi-roller straightener and the pressure straightener in the related technology, the pipe end back cutting allowance does not need to be reserved in advance, the steel pipe back cutting loss is greatly reduced, and the steel pipe yield is improved. Therefore, the technical scheme of the application can effectively solve the problem of back cutting of the steel pipe caused by pipe end bending in the related technology.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 shows a schematic front view of an embodiment one of a steel pipe straightening apparatus according to the invention;
FIG. 2 shows a schematic top view of the steel pipe straightening apparatus of FIG. 1;
FIG. 3 shows a schematic cross-sectional view of a first force application device of the steel tube straightening apparatus of FIG. 1;
FIG. 4 shows a partial schematic view of the steel pipe straightening apparatus of FIG. 1;
FIG. 5 is a schematic front view showing a steel pipe of the steel pipe straightening apparatus of FIG. 1 in a straightened state;
FIG. 6 shows a schematic front view of a second embodiment of a steel pipe straightening apparatus according to the invention, and
Fig. 7 shows a schematic top view of the steel pipe straightening apparatus of fig. 6.
Wherein the above figures include the following reference numerals:
1. steel pipe, 11, rack, 20, first roller assembly, 21, input roller, 22, output roller, 30, second roller assembly, 31, second bracket, 32, roller assembly, 40, first force application device, 41, first bracket, 411, first bracket, 412, arc plate, 42, first force application mechanism, 421, driving cylinder assembly, 422, clamping piece, 44, pivot, 50, heating device, 51, third bracket, 52, induction coil, 60, second force application device, 63, support, 64 and sleeve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
As shown in fig. 1 to 5, the steel pipe straightening apparatus of the first embodiment includes a base body, a first roller assembly 20, a second roller assembly 30, a heating device 50, a first force applying device 40, and a second force applying device 60. A first roller assembly 20 is provided on the substrate and conveys the steel pipe 1, the first roller assembly 20 comprising an input roller 21 and an output roller 22. A second roller assembly 30 is provided on the base body between the input roller 21 and the output roller 22, the second roller assembly 30 being capable of supporting the steel pipe in its vertical direction and driving the steel pipe 1 to rotate about the axis of the steel pipe 1. The heating device 50 can heat the bent portion of the steel pipe 1. The first force application device 40 is movably disposed on the base. The direction of movement of the first force application means 40 is perpendicular to the direction of conveyance of the steel pipe 1. The first force application device 40 includes a first bracket 41 and a first force application mechanism 42 movably disposed on the first bracket 41. The second force application device 60 is located on the side of the output roller 22 remote from the input roller 21, and the bend of the steel pipe 1 is located between the output roller 22 and the second force application device 60. The bent portion of the steel pipe 1 can be deformed to a straightened state by the combined action of the first urging means 42 and the second urging means 60.
With the technical solution of the first embodiment, the first roller assembly 20 can translate the steel pipe after being started, and adjust the position of the steel pipe 1 moving forward or backward. A second roller assembly 30 is provided on the base body between the input roller 21 and the output roller 22, the second roller assembly 30 being capable of supporting the steel pipe in its vertical direction and driving the steel pipe 1 to rotate about the axis of the steel pipe 1. The heating device 50 can heat the bent portion of the steel pipe 1. The bending of the steel pipe 1 is easy to deform under the condition of being pressed, the deformation resistance in the straightening process can be greatly reduced, the straightening effect is improved, and the phenomenon that the surface of the steel pipe is recessed in the related art is avoided. The first force application device 40 is movably disposed on the base. The direction of movement of the first force application means 40 is perpendicular to the direction of conveyance of the steel pipe 1. This facilitates matching the size of the steel pipe placed on the first roller assembly 20 by adjusting the distance between the first force applying device 40 and the first roller assembly 20. The first force application device 40 includes a first bracket 41 and a first force application mechanism 42 movably disposed on the first bracket 41. The second force application device 60 is located on the side of the output roller 22 away from the input roller 21, and the bent portion of the steel pipe 1 is located between the output roller 22 and the second force application device 60, and the bent portion of the steel pipe 1 can be deformed to a straightened state under the combined action of the first force application mechanism 42 and the second force application device 60. The steel pipe 1 may be first subjected to adjustment of the overall straightness of the steel pipe 1 by means of a multi-roll leveler or a pressure leveler, and then the bent portion of the pipe end of the steel pipe 1 which cannot be leveled by means of the multi-roll leveler or the pressure leveler may be transferred between the output roll and the second force application apparatus by means of the first roll assembly 20. Under the combined action of the first force application mechanism and the second force application device, the bent part of the steel pipe can be deformed to be in a straightened state. Therefore, the technical scheme of the first embodiment can make up for the short plates with the pipe end bending and straightening capacity of the multi-roller straightener and the pressure straightener in the related technology, the pipe end back cutting allowance does not need to be reserved in advance, the steel pipe back cutting loss is greatly reduced, and the steel pipe yield is improved. Therefore, the technical scheme of the first embodiment can effectively solve the problem of back cutting of the steel pipe caused by bending of the pipe end in the related technology.
The surplus of the back cut in this example means that, assuming that a 10m long steel pipe is required to be cut, the length of the steel pipe is longer than 10m before straightening, and after straightening, the part of the pipe end bent portion that is longer than 10m is cut off, and the cut part is the surplus of the back cut. The bend of the steel tube of the first embodiment is located at the end of the steel tube and the axis of rotation of the first roller assembly 20 of the first embodiment is perpendicular to the axis of rotation of the second roller assembly 30.
As shown in fig. 3, in the first embodiment, the first force application mechanism 42 includes a driving cylinder assembly 421 and a clip 422 connected to the driving cylinder assembly 421. The clamping piece 422 has a simple structure and is convenient to clamp the steel pipe 1 in cooperation with the first bracket 41. One end of the clamping piece 422 is hinged with the first bracket 41, the clamping piece 422 is hinged with the driving cylinder assembly 421, and a piston rod of the driving cylinder assembly 421 is hinged with the first bracket 41. Under the movement of the piston rod, the clamping piece 422 is driven to swing around the first bracket 41 so as to adjust the opening size of the clamping piece 422 and adjust according to the outer diameter size of the steel pipe 1, thereby ensuring that the steel pipe 1 can be completely clamped. Thus, the opening and closing are carried out by adjusting the opening sizes of the clamping pieces 422 according to the sizes of different outer diameters of the steel pipes, so that the pressure head in the related technology is prevented from being frequently replaced, and the working efficiency is greatly improved.
The driving cylinder of the driving cylinder assembly in the first embodiment can be an oil cylinder or an air cylinder.
As shown in fig. 3, in the first embodiment, the first bracket 41 includes a first frame 411 and an arc plate 412 provided on the first frame 411. The clip 422 is arcuate. The shape of the arc plate 412 and the clamping piece 422 are similar to the contour of the pipe wall of the steel pipe 1, so that the contact area of the arc plate 412 and the pipe wall of the steel pipe 1 can be ensured, and meanwhile, the contact area of the clamping piece 422 and the pipe wall of the steel pipe 1 can be ensured, so that the clamping and fixing effects of the first force application mechanism 42 are better and more stable. The first bracket 41 further includes a first cylinder assembly driving the first bracket 411 to move. The first oil cylinder assembly comprises an oil cylinder and a piston rod movably arranged in the oil cylinder. The cylinder is hinged to the gantry 11 and the piston rod is hinged to the first bracket 41.
As shown in fig. 3, in the first embodiment, the clamping pieces 422 include two clamping pieces located at two sides of the arc plate 412, and the size of the opening between the two clamping pieces 422 can be adjusted, so that the clamping pieces 422 can flexibly adjust according to the outer diameter size of the steel pipe 1, and can reliably clamp the steel pipe 1. Clip 422 is connected to arcuate plate 412 by pivot 44.
As shown in fig. 1, in the first embodiment, the base includes a stage 11 and a foundation. A first force applying device 40 is provided on the gantry 11 above the first roller assembly 20. The stand 11 is provided to facilitate the fixing of the first force application means 40 above the steel pipe 1. The cylinder of the first cylinder assembly is connected with the gantry 11. The first roller assembly 20 and the second roller assembly 30 are both disposed on the foundation, and the second force application device 60 is disposed on the gantry 11. The stand 11 is provided to facilitate fixing the second force application device 60 above the steel pipe 1. In the first embodiment, the first force application device 40 and the second force application device 60 are both located above the steel pipe 1, so that in the case that the pipe end of the steel pipe 1 is bent upward, the first force application device 40 can press the steel pipe 1 against the first roller assembly 20, so that the clamping piece of the second force application device 60 can apply force to the pipe end of the steel pipe 1 from top to bottom. During the application of force, a suitable stroke and supporting force are selected according to the severity of the bending of the ends of the steel pipe 1. Specifically, the steel pipe straightening apparatus further comprises a detecting device provided at the pipe end bending portion of the steel pipe 1 and a controller connected to the detecting device, and the second force application device 60 is connected to the controller. The proper stroke and supporting force are controlled by the controller to realize stepless adjustment of the upward stroke. The "severity of pipe end bending" includes the length and degree of bending of the pipe end, and the severity can be determined manually or automatically by infrared. As shown in fig. 1, in the first embodiment, the second force application device 60 has the same structure as the first force application device 40. Thus, the assembly is convenient, and the production efficiency is improved. Specifically, the second force application mechanism comprises a driving cylinder assembly and a second clamping piece connected with the driving cylinder assembly, one end of the second clamping piece is hinged with the fourth bracket, the second clamping piece is hinged with the driving cylinder assembly, and a piston rod of the driving cylinder assembly is hinged with the fourth bracket. The fourth bracket comprises a second bracket body and a second arc-shaped plate arranged on the second bracket body, and the second clamping piece is arc-shaped.
As shown in fig. 1 and 2, in the first embodiment, the first force application devices 40 include five, five first force application devices 40 that are disposed on the base at intervals. The five first force application devices can apply force to the steel pipe 1 respectively, so that the steel pipe 1 can be fixed more reliably. Of course, in the embodiment not shown in the other figures, the number of the first force application devices is not limited to five, and may be two, three, four, six, and more. The specific design quantity can be adjusted according to the length of the steel pipe which is practically suitable for.
In the first embodiment, as shown in fig. 4, the second roller assembly 30 includes a second bracket 31 movably provided on the base body and a roller assembly 32 rotatably coupled to the second bracket 31. The roller assembly 32 is simple in construction and easy to install and manufacture. The roller assembly 32 includes two rollers, of course, the number of rollers can be adjusted according to the length of the steel pipe to be actually used. Meanwhile, the distance between the two rollers driving the two rollers to rotate is adjustable, so that the steel pipes with different outer diameter sizes can be adapted. The second roller assembly 30 further includes a second cylinder assembly (not shown) for driving the second carriage 31 to move, the second cylinder assembly including a cylinder and a piston rod movably disposed in the cylinder, the piston rod being hinged with the roller assembly 32, the cylinder being hinged with the foundation.
As shown in fig. 1 to 4, in the first embodiment, the steel pipe straightening apparatus further includes a controller to which the first force applying device 40 is connected, and the heating device 50 includes a third bracket 51 and an induction coil 52 provided on the third bracket 51, the induction coil 52 being connected to the controller, the induction coil 52 being removably sleeved outside the bend of the steel pipe 1. The induction coil 52 has a simple structure and lower cost, and heats the bending part of the steel pipe 1 more uniformly. Before straightening, the induction coil 52 is sleeved on the bending part of the steel pipe 1 to heat the bending part of the steel pipe 1, and after the heating is finished, the induction coil 52 is detached from the bending part of the steel pipe 1. The induction coil 52 of the present embodiment is preferably an intermediate frequency induction coil. In other embodiments not shown in the figures, the heating device may also be an oxygen lance according to the actual conditions of the plant.
As shown in fig. 1 to 5, in the first embodiment, the specific operation of the steel pipe straightening apparatus is as follows:
Through the first roller assembly 20, positioning the bending position of the pipe end of the steel pipe 1, lifting the second roller assembly 30 to exceed the first roller assembly 20, driving the steel pipe 1 to rotate upwards in the bending direction of the pipe end of the steel pipe 1 in the circumferential direction, moving the induction coil 52 to the bending position of the pipe end and heating, withdrawing the induction coil 52, moving the first force application device 40 downwards and fixing the pipe body of the steel pipe 1, and driving the first bracket 41 of the second force application device 60 to apply force downwards until the bending of the pipe end of the steel pipe 1 is eliminated. Thus, the technical scheme of the first embodiment of the steel tube straightening equipment not only ensures that the defect of the bent part of the tube end of the steel tube is effectively overcome, meets the straightness requirement of the tube end of the steel tube, but also ensures that the surface of the steel tube is not damaged in the straightening process.
As shown in fig. 6 and 7, in the second embodiment of the steel pipe straightening apparatus provided by the present application, the difference from the first embodiment is that the base body includes a foundation and a pedestal provided on the foundation, and the first force applying means 40 is provided on the foundation below the first roller assembly 20, so that the pedestal is provided so as to fix the first force applying means 40 below the steel pipe 1. The first roller assembly 20 and the second roller assembly 30 are both disposed on the foundation, and the second force application device 60 is disposed on the pedestal. In this way, the mounting is provided to facilitate fixing the second urging means 60 below the steel pipe 1. In the second embodiment, the first force application device 40 and the second force application device 60 are both located below the steel pipe 1, so that, in the case where the pipe end of the steel pipe 1 is bent downward, the first force application device 40 can support the steel pipe 1 on the one hand, and the second force application device 60 can apply force to the steel pipe 1 from bottom to top. During the application of force, a suitable stroke and supporting force are selected according to the severity of the bending of the ends of the steel pipe 1. Specifically, the steel pipe straightening apparatus further includes a detecting device provided at the pipe end bending portion of the steel pipe 1 and a controller connected to the detecting device, and the first force applying device 40 is connected to the controller. The proper stroke and supporting force are controlled by the controller to realize stepless adjustment of the upward stroke. The "severity of pipe end bending" includes the length and degree of bending of the pipe end, and the severity can be determined manually or automatically by infrared.
The first force application device 40 of the second embodiment has the same structure as the first force application device 40 of the first embodiment. Like this, the cooperation of clamping piece 422 and first support 41 can provide holding power on the one hand, and on the other hand opens and closes through the opening size of adjusting clamping piece 422 according to the size of the different external diameters of steel pipe, avoids frequently changing the pressure head among the related art, has improved work efficiency greatly.
As shown in fig. 6 and 7, in the second embodiment, the second force application device 60 includes a support 63 and a sleeve 64 detachably fitted on the support 63, and the inner diameter of the sleeve 64 is larger than the outer diameter of the steel pipe 1. In this way, the sleeve 64 can be fitted over the outer side of the pipe end bending portion of the steel pipe 1 to perform the limiting. When the first urging means 40 urges the steel pipe 1 upward, the pipe end of the steel pipe 1 remains stationary, and the entire pipe body of the steel pipe 1 moves upward. The sleeve 64 is preferably a high-hardness steel sleeve. The inner diameter of the sleeve 64 is changeable according to the outer diameter of the correction steel pipe 1.
As shown in fig. 6, in the second embodiment, the concrete working procedure of the steel pipe straightening apparatus is as follows:
By means of the first roller assembly 20, positioning the bending position of the pipe end of the steel pipe 1, lifting the second roller assembly 30 to exceed the first roller assembly 20, driving the steel pipe 1 to rotate downwards in the circumferential direction until the bending direction of the pipe end of the steel pipe 1, moving the induction coil 52 to the bending position of the pipe end and heating, withdrawing the induction coil 52, running the first roller assembly 20 to enable the steel pipe 1 to enter the sleeve 64 and adjust the position of the straightening point, closing the clamping piece 422 in the first force application device 40, determining the lifting height of the clamping piece 422 according to the bending degree of the pipe end of the steel pipe 1, and after fine tuning, applying force upwards to eliminate the bending of the pipe end of the steel pipe 1 by the first support 41 of the first force application device 40 until the bending state of the pipe end of the steel pipe 1 is straightened. Thus, the technical scheme of the second embodiment of the steel tube straightening equipment not only ensures that the defect of the bent part of the tube end of the steel tube is effectively overcome, meets the straightness requirement of the tube end of the steel tube, but also ensures that the surface of the steel tube is not damaged in the straightening process.
The present application also provides a steel pipe straightening method, as shown in fig. 1 and 6, comprising the steps of conveying a bent portion of a steel pipe 1 between a first force applying device 40 and a second force applying device 60, rotating the steel pipe 1 to bend the bent portion of the steel pipe 1 in a horizontal direction or in a vertical direction, heating the bent portion of the steel pipe 1, fixing the steel pipe 1 with the first force applying device 40, applying force to the bent portion of the steel pipe 1 with the second force applying device 60, or limiting the bent portion of the steel pipe 1 with the second force applying device 60, and applying force to the steel pipe 1 with the first force applying device 40. The technical scheme of the steel tube straightening method can effectively solve the problem of back cutting of the steel tube caused by bending of the tube end in the related technology. The bending of the steel pipe 1 in the horizontal direction means that the axis of the steel pipe 1 is located in the horizontal plane at the bending. Bending the bend of the steel pipe 1 in the vertical direction means that the axis of the steel pipe 1 is located in the vertical plane at the bend.
In the application, the pipe end of the steel pipe can be bent leftwards, correspondingly, the first force application device and the second force application device are simultaneously positioned on the right side of the steel pipe, the pipe end of the steel pipe can be bent rightwards, and correspondingly, the first force application device and the second force application device are simultaneously positioned on the left side of the steel pipe. Of course, in the embodiments not shown in the other figures, one first force application device and one second force application device are provided in each of the four directions at the bend of the pipe end of the steel pipe. Thus, the bending degree of the bending part of the steel pipe can be adjusted at the same time. In addition, after the straightness of the steel (such as bars and channel steel) is adjusted through the conveying roller way and the pressure head structure in the related art, the bending part of the end part of the steel (such as bars and channel steel) can be straightened through the steel pipe straightening equipment.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present invention, and the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself.
Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
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| JPS5987924A (en) * | 1982-11-10 | 1984-05-21 | Nippon Steel Corp | Correcting method of material having circular sectional form |
| JPH02241618A (en) * | 1989-03-14 | 1990-09-26 | Kawasaki Steel Corp | Method for straightening bend of end part of steel tube |
| JP2539139B2 (en) * | 1992-04-21 | 1996-10-02 | 川崎製鉄株式会社 | Side guide used for rolling equipment and method of using the guide |
| JP2005305481A (en) * | 2004-04-20 | 2005-11-04 | Sumitomo Metal Ind Ltd | Hot straightening device for pipe nose bend |
| CN204638786U (en) * | 2015-03-10 | 2015-09-16 | 天津杰锋钢管工贸有限公司 | A kind of automation steel pipe straightening machine |
| US10300517B2 (en) * | 2016-09-19 | 2019-05-28 | Wamaco, Llc | Pipe end straightener |
| CN209465490U (en) * | 2018-12-27 | 2019-10-08 | 天津中鼎石油钻具制造有限公司 | A kind of pipe end coalignment |
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