Vertical tubular billet clamping device for seamless tube rolling production line

Abstract

The utility model belongs to the technical field of seamless tube rolling, and particularly relates to a vertical tubular billet clamping device for a seamless tube rolling production line, which comprises an upper mounting seat, a lower mounting seat, a power component, a working component and a guide component. Wherein the upper mounting seat and the lower mounting seat are formed by welding a plurality of steel plates; the power assembly comprises a first driving oil cylinder and a second driving oil cylinder; the working assembly comprises an upper clamping seat and a lower clamping seat, a group of upper clamping rollers are arranged on the upper clamping seat, and a group of lower clamping rollers are arranged on the lower clamping seat; the guide assembly comprises a first guide cylinder and a first guide rod which are matched with each other, and a second guide cylinder and a second guide rod which are matched with each other; the clamping device provided by the utility model is arranged at the input port of the pipe mill, and the upper clamping roller and the lower clamping roller are matched to clamp a tubular billet to be rolled, so that the radial bounce amplitude and the shaking amplitude of the tubular billet in the rolling process are reduced, and the wall thickness uniformity of a pierced billet obtained after rolling is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to seamless tube rolling technical field, concretely relates to a vertical rough pipe clamping device for seamless tube rolling production line. BACKGROUND

[0002] In the seamless tube rolling production line, after the perforation deformation step of completing the conversion of solid bar to hollow pipe, the output rough pipe is transported by the roller way and immediately enters the pipe mill for pipe rolling deformation, at this time, the rough pipe length has basically realized 3-5 times extension of the blank; when the rough pipe with the length of the core rod enters the pipe mill to start deformation, the rapid rotation and violent deformation make the rough pipe as a whole in the state of high frequency and strong vibration, which makes the rough pipe experience irregular bouncing and shaking in the pipe mill pass, and finally produces the problem of poor wall thickness uniformity of the rough pipe after rolling, which seriously affects the finished product quality of the seamless pipe. CONTENT OF THE UTILITY MODEL

[0003] In view of this, the utility model provides a vertical rough pipe clamping device for seamless tube rolling production line, and the clamping device is arranged at the input port of the pipe mill, aiming at clamping the rough pipe to be rolled by the cooperation of the upper clamping roller and the lower clamping roller, reducing the radial bouncing amplitude and shaking amplitude of the rough pipe in the rolling process, and improving the wall thickness uniformity of the rough pipe after rolling.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] A vertical rough pipe clamping device for seamless tube rolling production line is applied to the seamless tube rolling production line, the seamless tube rolling production line comprises a pipe mill, an input end of the pipe mill is provided with a clamping device for clamping the rough pipe output by the preceding process of the seamless tube rolling production line, and the clamping device comprises:

[0006] An upper mounting seat, the upper mounting seat is composed of a horizontal part and a vertical part to form an L-shaped structure, wherein the top end of the vertical part is fixedly connected with one end of the horizontal part;

[0007] A lower mounting seat is arranged below the horizontal part, and the area between the top of the lower mounting seat and the horizontal part is a working area;

[0008] A power assembly comprises a first drive oil cylinder arranged on the horizontal part and a second drive oil cylinder arranged on the lower mounting seat, wherein the cylinder body of the first drive oil cylinder is arranged on the top of the horizontal part, and the piston end of the first drive oil cylinder penetrates through the horizontal part and extends into the working area along the vertical direction; the cylinder body of the second drive oil cylinder is arranged in the interior of the lower mounting seat, and the piston end of the second drive oil cylinder also penetrates through the lower mounting seat and extends into the working area along the vertical direction;

[0009] The working assembly comprises an upper clamping seat arranged at the piston end of the first driving oil cylinder and a lower clamping seat arranged at the piston end of the second driving oil cylinder, wherein the bottom of the upper clamping seat is rotatably provided with a group of upper clamping rollers through the cooperation of a needle bearing seat and a needle bearing, and the top of the lower clamping seat is also rotatably provided with a group of lower clamping rollers through the cooperation of a needle bearing seat and a needle bearing, the group of upper clamping rollers and the group of lower clamping rollers are parallel to each other and correspond to each other, and when the first driving oil cylinder and the second driving oil cylinder drive the upper clamping seat and the lower clamping seat to approach each other, a clamping area for the passage of the tube is formed at the center of the group of upper clamping rollers and the group of lower clamping rollers.

[0010] The guiding assembly comprises a group of first guiding cylinders arranged on the horizontal part, the group of first guiding cylinders penetrates through the horizontal part, the inside of each first guiding cylinder is slidably connected with a first guiding rod, and the bottom end of each first guiding rod is connected to the top of the upper clamping seat; in addition, the guiding assembly further comprises a group of second guiding cylinders arranged on the lower mounting seat, the group of second guiding cylinders penetrates through the lower mounting seat, the inside of each second guiding cylinder is slidably connected with a second guiding rod, and the top end of each second guiding rod is connected to the bottom of the lower clamping seat.

[0011] Preferably, the upper mounting seat and the lower mounting seat are both made of a plurality of steel plates welded together, and a group of rib plates are arranged between the horizontal part and the vertical part in the upper mounting seat.

[0012] More preferably, in the power assembly, the maximum stroke of the first driving oil cylinder is 175 mm, and the maximum stroke of the second driving oil cylinder is 20 mm.

[0013] Further, in the working assembly, the circumferential outer surface of each upper clamping roller and each lower clamping roller is coated with a wear-resistant coating, and the outer diameter of the tube clamped by the group of upper clamping rollers and the group of lower clamping rollers ranges from 60 mm to 100 mm.

[0014] Further, in the guiding assembly, the positions of the group of first guiding cylinders correspond to the positions of the group of second guiding cylinders.

[0015] The utility model has the advantages of:

[0016] Overall, the utility model discloses utilize the first drive cylinder and second drive cylinder in power assembly in vertical direction drive upper clamping seat and lower clamping seat opposite movement, and utilize a group of upper clamping roller on upper clamping seat, and a group of lower clamping roller on lower clamping seat, form clamping area, when the output of the seamless tube rolling production line's preposition process raw pipe passes through clamping area and enters pipe mill to start to roll, control first drive cylinder and second drive cylinder operation and clamping the raw pipe, reduce the radial runout amplitude and sway amplitude when raw pipe enters pipe mill and starts to roll deformation, it is favorable to improve the wall thickness uniformity of the pipe that raw pipe is rolled after, finally improve the qualified rate of the seamless pipe product made.

[0017] Specifically, the first drive cylinder and the second drive cylinder are arranged to adjust the height of the clamping area in the vertical direction, and the clamping area can adapt to raw pipes with different outer diameters according to the extension amount of the two drive cylinders, which embodies the practicability of the utility model; in addition, the utility model also sets a guide assembly, which realizes the stability of the opposite movement of the two clamping seats by the cooperation of the first guide cylinder and the first guide rod and the cooperation of the second guide cylinder and the second guide rod. On this basis, the first guide cylinder and the second guide cylinder are arranged in a position corresponding manner, so that the clamping device has more stable structural strength and better clamping effect on the raw pipe. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0019] Figure 1 It is the overall structure schematic view of the clamping device provided by the utility model;

[0020] Figure 2 It is the side view of the clamping device in the utility model;

[0021] Figure 3 It is the overall structure schematic view of the upper mounting seat in the utility model;

[0022] Figure 4 It is the overall structure schematic view of the lower mounting seat in the utility model;

[0023] Figure 5 It is the specific structure schematic view of the upper clamping seat and the upper clamping roller in the utility model working assembly;

[0024] Figure 6 It is the specific structure schematic view of the lower clamping seat and the lower clamping roller in the utility model working assembly DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0026] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, and can be the communication between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the existing seamless pipe rolling production line, according to the process from the blank to the finished product, it is generally composed of the following modules in turn: a feeding module, a piercing module, a pipe rolling module, a sizing module, a straightening module, and a finished product collecting module; wherein the core of the seamless pipe rolling is the piercing module and the pipe rolling module: the piercing module obtains a rough pipe after piercing a solid pipe blank, and then pushes the rough pipe into the pipe rolling module to obtain a rough pipe by using a pipe rolling mill; in the process, the rough pipe obtains high-speed rotating power when entering the pipe rolling mill, and is formed by using each roller under the rotating power, and it is found in the process of daily production that when the rough pipe enters the pipe rolling mill to start deformation, the rapid rotation and severe deformation make the rough pipe as a whole in a high-frequency and strong vibration state, which causes irregular bouncing and shaking in the pipe rolling mill die during the rolling deformation of the rough pipe under the combined action of the pipe rolling mill roller and the mandrel, and finally produces a problem of poor wall thickness uniformity of the rough pipe obtained after pipe rolling, which seriously affects the finished product quality of the seamless pipe.

[0028] Therefore, this utility model provides a vertical tube clamping device for a seamless tube rolling production line. The clamping device is configured at the input end of the tube rolling mill. When the tube passes through the clamping area of ​​the clamping device and extends into the tube rolling mill to begin rolling, the first drive cylinder and the second drive cylinder are controlled to operate. A set of upper clamping rollers and a set of lower clamping rollers are used to clamp the tube. The cooperation of each clamping roller allows the tube to rotate within the clamping area and reduces its radial runout and sway amplitude. This is beneficial to improving the wall thickness uniformity of the rough tube obtained after the tube is rolled, and ultimately improving the qualification rate of the finished seamless tube.

[0029] The solution provided by this utility model will now be described in detail with reference to the accompanying drawings.

[0030] This utility model provides a vertical tube clamping device for a seamless tube rolling production line. The seamless tube rolling production line includes a tube rolling mill, and the input end of the rolling mill is equipped with a clamping device for clamping the tube 1 output from the preceding process of the seamless tube rolling production line. Figure 1 As shown, the clamping device includes: an upper mounting base 2, a lower mounting base 3, a power assembly 4, a working assembly 5, and a guide assembly 6.

[0031] like Figures 1-3 As shown, the upper mounting base 2 is composed of a horizontal part 201 and a vertical part 202 forming an L-shaped structure, wherein the top end of the vertical part 202 is fixedly connected to one end of the horizontal part 201; the lower mounting base 3 is located below the horizontal part 201, and the area between the top of the lower mounting base 3 and the horizontal part 201 is the working area.

[0032] Based on the above embodiments, the upper mounting base 2 and the lower mounting base 3 together form the structural foundation supporting the entire clamping device. In addition, both the upper mounting base 2 and the lower mounting base 3 are made of several steel plates welded together, which is easy to process and has a low cost. Furthermore, in the upper mounting base 2, a set of ribs 203 is provided between the horizontal part 201 and the vertical part 202, which improves the structural strength of the upper mounting base 2.

[0033] In this technical solution, such as Figure 1 , Figures 3-4 As shown, the power assembly 4 includes a first drive cylinder 401 mounted on the horizontal part 201 and a second drive cylinder 402 mounted on the lower mounting base 3.

[0034] The cylinder body of the first drive cylinder 401 is located at the top of the horizontal part 201, and the piston end of the first drive cylinder 401 extends vertically into the working area after passing through the horizontal part 201. In addition, the maximum stroke of the first drive cylinder 401 is 175mm.

[0035] The cylinder body of the second driving oil cylinder 402 is arranged inside the lower mounting seat 3, and the piston end of the second driving oil cylinder 402 penetrates through the lower mounting seat 3 and extends into the working area along the vertical direction, and the maximum stroke of the second driving oil cylinder 402 is 20 mm.

[0036] Based on the above embodiment, the arrangement of the first driving oil cylinder 401 and the second driving oil cylinder 402 makes the position of the clamping area adjustable in the vertical direction, which can adapt to different input end heights of different types of pipe rolling mills. In addition, since the maximum stroke of the first driving oil cylinder 401 is much larger than that of the second driving oil cylinder 402, interference between the blank pipe 1 and the body of the clamping device during the process of feeding the blank pipe 1 into the pipe rolling mill can be avoided. That is, before the blank pipe 1 is fed into the pipe rolling mill, the first driving oil cylinder 401 and the second driving oil cylinder 402 in the clamping device are in the retracted state. When the blank pipe 1 enters the pipe rolling mill and starts to be rolled, the first driving oil cylinder 401 and the second driving oil cylinder 402 are controlled to start to operate, and the blank pipe 1 that has not yet entered the pipe rolling mill is clamped by the working assembly 5.

[0037] Based on the above structure, in the technical solution, as shown in Figures 5-6 the working assembly 5 includes an upper clamping seat 501 arranged at the piston end of the first driving oil cylinder 401 and a lower clamping seat 502 arranged at the piston end of the second driving oil cylinder 402.

[0038] The bottom of the upper clamping seat 501 is rotatably provided with a group of parallel upper clamping rollers 503 through the cooperation of the needle bearing seat 7 and the needle bearing. The top of the lower clamping seat 502 is also rotatably provided with a group of parallel lower clamping rollers 504 through the cooperation of the needle bearing seat 7 and the needle bearing.

[0039] In addition, the group of upper clamping rollers 503 and the group of lower clamping rollers 504 are parallel to and correspond to each other. Based on the above embodiment, when the first driving oil cylinder 401 and the second driving oil cylinder 402 drive the upper clamping seat 501 and the lower clamping seat 502 to approach each other, a clamping area for the blank pipe 1 to pass through is formed at the center of the group of upper clamping rollers 503 and the group of lower clamping rollers 504. On this basis, the circumferential outer surfaces of each upper clamping roller 503 and each lower clamping roller 504 are coated with a wear-resistant coating, so that each upper clamping roller 503 and each lower clamping roller 504 can rotate with the blank pipe 1, thereby avoiding serious wear of the clamping rollers and reducing production costs. In addition, the outer diameter range of the blank pipe 1 clamped by the group of upper clamping rollers 503 and the group of lower clamping rollers 504 is 60 mm to 100 mm. If the diameter of the blank pipe 1 is greater than 100 mm, the clamping rollers, the matching needle bearing seat 7 and the needle bearing can be replaced to expand the application range of the device.

[0040] In the technical solution, the opposite movement of the upper clamping seat 501 and the lower clamping seat 502 is also limited and guided by the guiding effect of the guiding assembly 6. Figures 1-4 As shown in the figure, the guiding assembly 6 comprises a group of first guiding cylinders 601 arranged on the horizontal part 201, the group of first guiding cylinders 601 penetrates through the horizontal part 201, the inside of each first guiding cylinder 601 is slidably connected with a first guiding rod 602, and the bottom end of each first guiding rod 602 is connected to the top of the upper clamping seat 501.

[0041] In addition, the guiding assembly 6 further comprises a group of second guiding cylinders 603 arranged on the lower mounting seat 3, the group of second guiding cylinders 603 penetrates through the lower mounting seat 3, the inside of each second guiding cylinder 603 is slidably connected with a second guiding rod 604, and the top end of each second guiding rod 604 is connected to the bottom of the lower clamping seat 502.

[0042] Based on the above-mentioned embodiments, the cooperation of the first guiding cylinder 601 and the first guiding rod 602 and the cooperation of the second guiding cylinder 603 and the second guiding rod 604 realize the stability of the opposite movement of the upper clamping seat 501 and the lower clamping seat 502; on this basis, the positions of the group of first guiding cylinders 601 and the group of second guiding cylinders 603 correspond to each other, and this setting mode makes the structure strength of the clamping device more stable when in use, and makes the clamping effect on the blank pipe 1 better.

[0043] Specifically, when the blank pipe 1 is clamped by the clamping device provided by the utility model, the first driving oil cylinder 401 and the second driving oil cylinder 402 are first in the contracted state, then when the blank pipe 1 obtained in the pre-process of the seamless pipe rolling production line enters the working area, the first driving oil cylinder 401 and the second driving oil cylinder 402 are controlled to operate, when the end part of the blank pipe 1 enters the pipe mill and starts rolling, the first driving oil cylinder 401 and the second driving oil cylinder 402 are controlled to work, and the group of upper clamping rollers 503 and the group of lower clamping rollers 504 immediately clamp the blank pipe 1 which has not entered the pipe mill, the cooperation of the clamping rollers enables the blank pipe 1 to rotate in the clamping area and reduces the radial run-out amplitude and the shaking amplitude, which is beneficial to improving the wall thickness uniformity of the rough pipe obtained after the blank pipe 1 is rolled, and finally improves the qualified rate of the obtained seamless pipe product.

[0044] Finally, it should be pointed out that: the above-mentioned is only the preferred embodiment of the utility model, and is not used for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A vertical tube clamping device for a seamless tube rolling production line, applied in a seamless tube rolling production line, the seamless tube rolling production line including a tube rolling mill, the input end of the tube rolling mill being provided with a clamping device for clamping the tube output from the preceding process of the seamless tube rolling production line, characterized in that: The clamping device includes: The upper mounting base is composed of a horizontal part and a vertical part forming an L-shaped structure, wherein the top end of the vertical part is fixedly connected to one end of the horizontal part; The lower mounting base is located below the horizontal part, and the area between the top of the lower mounting base and the horizontal part is the working area; The power assembly includes a first drive cylinder disposed on the horizontal portion and a second drive cylinder disposed on the lower mounting base. The cylinder body of the first drive cylinder is disposed at the top of the horizontal portion, and the piston end of the first drive cylinder extends vertically into the working area after penetrating the horizontal portion. The cylinder body of the second drive cylinder is disposed inside the lower mounting base, and the piston end of the second drive cylinder also extends vertically into the working area after penetrating the lower mounting base. The working assembly includes an upper clamping seat located at the piston end of the first driving cylinder and a lower clamping seat located at the piston end of the second driving cylinder. The bottom of the upper clamping seat is rotatably equipped with a set of parallel upper clamping rollers through the cooperation of a needle roller bearing seat and a needle roller bearing. The top of the lower clamping seat is also rotatably equipped with a set of parallel lower clamping rollers through the cooperation of a needle roller bearing seat and a needle roller bearing. The set of upper clamping rollers and the set of lower clamping rollers are parallel to each other and correspond to each other. When the first driving cylinder and the second driving cylinder drive the upper clamping seat and the lower clamping seat to move closer to each other, a clamping area for the capillary tube to pass through is formed at the center of the set of upper clamping rollers and the set of lower clamping rollers. The guide assembly includes a set of first guide cylinders disposed on the horizontal portion, the set of first guide cylinders penetrating the horizontal portion, each first guide cylinder having a first guide rod slidably connected inside, and the bottom end of each first guide rod being connected to the top of the upper clamping seat; in addition, the guide assembly also includes a set of second guide cylinders disposed on the lower mounting seat, the set of second guide cylinders penetrating the lower mounting seat, each second guide cylinder having a second guide rod slidably connected inside, and the top end of each second guide rod being connected to the bottom of the lower clamping seat.

2. The vertical tube clamping device for a seamless tube rolling production line according to claim 1, characterized in that: Both the upper and lower mounting bases are made of several steel plates welded together, and a set of ribs is also provided between the horizontal and vertical parts in the upper mounting base.

3. The vertical tube clamping device for a seamless tube rolling production line according to claim 1, characterized in that: In the power assembly, the maximum stroke of the first drive cylinder is 175 mm; the maximum stroke of the second drive cylinder is 20 mm.

4. The vertical tube clamping device for a seamless tube rolling production line according to claim 1, characterized in that: In the working assembly, the outer circumferential surface of each of the upper clamping rollers and each of the lower clamping rollers is coated with a wear-resistant coating, and the outer diameter of the capillary clamped by a set of upper clamping rollers and a set of lower clamping rollers ranges from 60mm to 100mm.

5. A vertical tube clamping device for a seamless tube rolling production line according to claim 1, characterized in that: In the guide assembly, the positions of a set of first guide cylinders correspond to the positions of a set of second guide cylinders.

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