Seamless steel tube inner wall coping device

Abstract

The invention relates to the technical field of seamless steel pipe manufacturing, in particular to a seamless steel pipe inner wall coping device which comprises a base, an n-shaped support is fixedly installed on the upper end face of the base, and a vertical sliding rail located behind the n-shaped support is fixedly installed on the upper end face of the base. The base and the vertical sliding rail are jointly provided with a positioning mechanism used for conducting three-point synchronous rolling positioning on the outer ring wall of the seamless steel pipe. The positioning mechanism, the driving mechanism and the limiting mechanism are used in cooperation, seamless steel pipes of different sizes are ground through a positioning, adjusting and limiting integrated operation model, the inner walls of the seamless steel pipes are evenly and stably ground through three-point synchronous rolling positioning, three-point stable supporting is provided through a triangular structure, and the machining precision of the seamless steel pipes is improved. Rapid switching and positioning grinding of seamless steel pipes of different sizes are achieved, meanwhile, under accurate alignment of the auxiliary positioning mechanism, grinding errors are reduced, and the smoothness and the overall quality of the inner walls of the seamless steel pipes are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seamless steel pipe manufacturing, and particularly to an inner wall grinding device for seamless steel pipes. Background Art

[0002] A seamless steel pipe is a steel pipe manufactured through a hot rolling or cold drawing process, which can provide higher strength and better pressure resistance. Compared with a welded steel pipe, a seamless steel pipe performs more excellently in terms of withstanding internal and external pressures, temperature changes, corrosion resistance, and fatigue resistance. When producing seamless steel pipes, in order to ensure the smoothness of the inner wall of the seamless steel pipe, it is necessary to perform a grinding operation on its inner wall to reduce the frictional resistance when the fluid flows in the pipe, thereby improving the fluid transportation efficiency of the seamless steel pipe.

[0003] When grinding the inner wall of a seamless steel pipe, the seamless steel pipe is usually placed between co-rotating rollers, and then the upper end of the seamless steel pipe is squeezed and positioned, so that the two rollers support the seamless steel pipe and drive it to rotate. Then, a grinding head is used to enter the seamless steel pipe to grind its inner wall.

[0004] However, the above process has the following disadvantages: 1. When positioning the seamless steel pipe, no auxiliary locking is implemented between the upper extrusion and the lower support. During the rotation of the seamless steel pipe, displacement is likely to occur, resulting in uneven grinding of the inner wall of the seamless steel pipe, affecting the final surface smoothness, and causing vibration of the seamless steel pipe, further affecting the grinding accuracy and surface quality; 2. When positioning the seamless steel pipe, it is necessary to manually adjust the distance between the rollers to adapt to seamless steel pipes of different sizes. Manual adjustment requires a certain amount of operation time, so it will prolong the production efficiency of grinding the inner wall of the seamless steel pipe, and manual adjustment will have errors, resulting in inaccurate distance between the rollers, thus affecting the fixing and rotational grinding effect of the seamless steel pipe. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an inner wall grinding device for seamless steel pipes, which is achieved by the following specific technical means: An inner wall grinding device for seamless steel pipes includes a base, a U-shaped bracket is fixedly installed on the upper end surface of the base, a vertical slide rail is fixedly installed on the upper end surface of the base behind the U-shaped bracket, and a positioning mechanism for implementing three-point synchronous rolling positioning on the outer wall of the seamless steel pipe is jointly provided on the base and the vertical slide rail.

[0006] The positioning mechanism includes an adjustment part arranged on the base, an upper positioning part for cooperating with the adjustment part to implement positioning adjustment for seamless steel pipes of different sizes is arranged on the vertical slide rail, a stabilizing part for adopting triangular support to stabilize the positioning of the adjustment part and the upper positioning part is arranged on the upper positioning part, and a grinding part for grinding the inner wall of the seamless steel pipe is arranged on the base.

[0007] A driving mechanism for providing power to the adjustment part is arranged on the base; the driving mechanism includes a matching part arranged on the adjustment part, and a driving part matching with the matching part is also arranged on the base.

[0008] A limiting mechanism for matching the positioning mechanism is arranged on the U-shaped bracket; the limiting mechanism includes a descending part arranged on the U-shaped bracket and used for stably pressing the upper fixing part against the upper end of the seamless steel pipe, a supporting part for matching the adjustment part to provide rolling support for the descending part is arranged on the descending part, and a limiting part for matching the grinding part is also arranged on the descending part.

[0009] As a preferred technical solution of the present invention, the adjustment part includes a slideway, a first slider, a bidirectional threaded rod, a first motor, a central shaft rod and a first limiting roller. Slideways symmetrically arranged before and after the U-shaped bracket are opened on the upper end surface of the base. Left and right symmetric first sliders are slidably installed in the slideways. A bidirectional threaded rod threadedly connected to the corresponding left and right symmetric first sliders is installed in the rear slideway through a bearing. A first motor with an output end fixedly connected to the bidirectional threaded rod is fixedly installed on the base. A central shaft rod is jointly installed through the front and rear opposite first sliders through bearings, and a first limiting roller located between the first sliders is fixedly sleeved on the central shaft rod.

[0010] As a preferred technical solution of the present invention, the upper fixing part includes a screw rod, a second slider, a positioning rod and a second limiting roller. A screw rod perpendicular to the bidirectional threaded rod is rotatably installed on the front end surface of the vertical slide rail through a bearing seat arranged. A second slider threadedly connected to the screw rod is slidably installed on the front end surface of the vertical slide rail. A positioning rod slidably penetrating the second slider is fixedly installed on the front end surface of the vertical slide rail. The bidirectional threaded rod and the screw rod are传动连接 through a first bevel gear set arranged. A second limiting roller is rotatably installed on the front end surface of the second slider through a rotating shaft arranged.

[0011] As a preferred technical solution of the present invention, the stabilizing part includes a supporting telescopic rod. Supporting telescopic rods are symmetrically hinged to the left and right ends of the second slider. The end of the supporting telescopic rod far from the second slider is hinged to the corresponding first slider. A stable triangular structure is formed among the second slider, the supporting telescopic rods on its left and right sides, the corresponding left and right two first sliders and the bidirectional threaded rod.

[0012] As a preferred technical solution of the present invention, the grinding part includes an electric slide rail, a moving slide seat, a second motor, an extending rod and a grinding head. An electric slide rail located in front of the front slideway is fixedly installed on the upper end surface of the base. A moving slide seat is fixedly installed on the moving end of the electric slide rail. A second motor is fixedly installed on the upper end of the moving slide seat. An extending rod is installed on the rear end surface of the moving slide seat through a bearing. The extending rod and the second motor are传动连接 through a first gear set arranged. A grinding head is fixedly installed at the rear end of the extending rod.

[0013] It should be noted that there is an error in the original text in item . "传动连接" should be translated as "driven connection". The corrected translation is as follows: A driving mechanism for providing power to the adjustment part is arranged on the base; the driving mechanism includes a matching part arranged on the adjustment part, and a driving part matching with the matching part is also arranged on the base.

[0008] A limiting mechanism for matching the positioning mechanism is arranged on the U-shaped bracket; the limiting mechanism includes a descending part arranged on the U-shaped bracket and used for stably pressing the upper fixing part against the upper end of the seamless steel pipe, a supporting part for matching the adjustment part to provide rolling support for the descending part is arranged on the descending part, and a limiting part for matching the grinding part is also arranged on the descending part.

[0009] As a preferred technical solution of the present invention, the adjustment part includes a slideway, a first slider, a bidirectional threaded rod, a first motor, a central shaft rod and a first limiting roller. Slideways symmetrically arranged before and after the U-shaped bracket are opened on the upper end surface of the base. Left and right symmetric first sliders are slidably installed in the slideways. A bidirectional threaded rod threadedly connected to the corresponding left and right symmetric first sliders is installed in the rear slideway through a bearing. A first motor with an output end fixedly connected to the bidirectional threaded rod is fixedly installed on the base. A central shaft rod is jointly installed through the front and rear opposite first sliders through bearings, and a first limiting roller located between the first sliders is fixedly sleeved on the central shaft rod.

[0010] As a preferred technical solution of the present invention, the upper fixing part includes a screw rod, a second slider, a positioning rod and a second limiting roller. A screw rod perpendicular to the bidirectional threaded rod is rotatably installed on the front end surface of the vertical slide rail through a bearing seat arranged. A second slider threadedly connected to the screw rod is slidably installed on the front end surface of the vertical slide rail. A positioning rod slidably penetrating the second slider is fixedly installed on the front end surface of the vertical slide rail. The bidirectional threaded rod and the screw rod are driven by a first bevel gear set arranged. A second limiting roller is rotatably installed on the front end surface of the second slider through a rotating shaft arranged.

[0011] As a preferred technical solution of the present invention, the stabilizing part includes a supporting telescopic rod. Supporting telescopic rods are symmetrically hinged to the left and right ends of the second slider. The end of the supporting telescopic rod far from the second slider is hinged to the corresponding first slider. A stable triangular structure is formed among the second slider, the supporting telescopic rods on its left and right sides, the corresponding left and right two first sliders and the bidirectional threaded rod.

[0012] As a preferred technical solution of the present invention, the grinding part includes an electric slide rail, a moving slide seat, a second motor, an extending rod and a grinding head. An electric slide rail located in front of the front slideway is fixedly installed on the upper end surface of the base. A moving slide seat is fixedly installed on the moving end of the electric slide rail. A second motor is fixedly installed on the upper end of the moving slide seat. An extending rod is installed on the rear end surface of the moving slide seat through a bearing. The extending rod and the second motor are driven by a first gear set arranged. A grinding head is fixedly installed at the rear end of the extending rod.

[0013] As a preferred technical solution of the present invention, the driving part includes a spline shaft and a third motor. The upper end surface of the base is rotatably installed with a spline shaft located behind the rear slideway through a bearing seat provided, and the upper end surface of the base is fixedly installed with a third motor whose output end is fixedly connected to the spline shaft.

[0014] As a preferred technical solution of the present invention, the matching part includes an L-shaped support plate and a spline sleeve. Symmetrically left and right spline sleeves are slidably installed on the spline shaft. An L-shaped support plate is installed on the spline sleeve through a bearing. The rear end of the central shaft rod penetrates through the horizontal longitudinal section of the L-shaped support plate and is in bearing connection with the L-shaped support plate. A second bevel gear set is provided for transmission connection between the spline sleeve and the corresponding central shaft rod.

[0015] As a preferred technical solution of the present invention, the descending part includes an electric push rod, a support cross plate, a first rolling press plate and a pressing arc plate. The electric push rod is fixedly installed on the upper end of the U-shaped bracket. The telescopic end of the electric push rod is fixedly installed with a support cross plate located above the second limiting roller. The lower end surface of the support cross plate is fixedly installed with a first rolling press plate through a support rod provided. The first rolling press plate is located in front of the second limiting roller. A pressing arc plate that is in rolling contact with the rotating shaft on the second limiting roller is fixedly installed on the support rod.

[0016] As a preferred technical solution of the present invention, the supporting part includes a sliding cylinder, an L-shaped sliding rod, a telescopic sleeve and a second rolling press plate. Sliding cylinders are fixedly installed and penetrate through both the front and rear ends of the support cross plate. The axis of the sliding cylinder extends from left to right. L-shaped sliding rods are symmetrically and slidably installed at both the left and right ends of the sliding cylinder. A telescopic sleeve is slidably installed on the vertical section of the L-shaped sliding rod. The lower end of the telescopic sleeve is fixedly installed with a second rolling press plate located above the first limiting roller. A number of balls are distributed in an array on the lower end surfaces of the first rolling press plate, the pressing arc plate and the second rolling press plate. A bolt for adjusting the distance between the second rolling press plate and the support cross plate is provided on the telescopic sleeve.

[0017] As a preferred technical solution of the present invention, the limiting part includes a first arc-shaped support block, an L-shaped connecting rod and a second arc-shaped support block. The first arc-shaped support block is fixedly installed on the upper end surface of the base and is located behind the electric slide rail. The upper arc surface of the first arc-shaped support block contacts the outer wall of the extending rod. The front end of the support cross plate is fixedly installed with a second arc-shaped support block located directly above the first arc-shaped support block through an L-shaped connecting rod provided. A number of balls are distributed in an array on the arc surfaces of the second arc-shaped support block and the first arc-shaped support block that are close to each other.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The inner wall grinding device of the seamless steel pipe cooperates with the positioning mechanism, the driving mechanism and the limiting mechanism, and adopts an integrated operation model of positioning, adjustment and limiting to complete the grinding of seamless steel pipes of different sizes. The three-point synchronous rolling positioning is used to achieve uniform and stable grinding of the inner wall of the seamless steel pipe. The three-point stable support provided by the triangular structure is used to achieve rapid switching and positioning grinding of seamless steel pipes of different sizes. At the same time, under the precise alignment of the auxiliary positioning mechanism, the grinding error is reduced, and the smoothness and overall quality of the inner wall of the seamless steel pipe are significantly improved.

[0019] 2. The inner wall grinding device of the seamless steel pipe, through the positioning mechanism, can simultaneously implement three-point synchronous rolling positioning on the outer ring wall of the seamless steel pipe before grinding, which can provide evenly distributed support points for the seamless steel pipe, and at the same time can better disperse the pressure generated during the grinding process, ensuring uniform grinding of the inner wall of the seamless steel pipe, thereby ensuring the stability and accuracy of the seamless steel pipe during the grinding process, and then improving the smoothness and quality of the inner wall surface of the seamless steel pipe.

[0020] 3. The inner wall grinding device of the seamless steel pipe can perform positioning grinding on seamless steel pipes of different sizes by cooperating with the positioning mechanism and the driving mechanism. Therefore, seamless steel pipes of different specifications can be ground by rapid switching, which is beneficial to shorten the adjustment time of the device, thereby improving the flexibility and adaptability of the device.

[0021] 4. The inner wall grinding device of the seamless steel pipe cooperates with the positioning mechanism and the limiting mechanism, and uses the triangular structure to provide stable support for three-point positioning. The cooperation of the two ensures the stability of the seamless steel pipe during grinding, and after the positioning is completed, the positioning of the auxiliary positioning mechanism is auxiliary by downward squeezing to ensure that the seamless steel pipe can be accurately aligned during grinding, thereby reducing the error in the grinding process and further improving the quality of the inner wall grinding of the seamless steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention when it is working.

[0023] Figure 2 It is a partial three-dimensional structural schematic diagram of the positioning mechanism of the present invention.

[0024] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 4 It is a partial three-dimensional structural schematic diagram of the driving mechanism and the positioning mechanism of the present invention when they cooperate.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0027] In the figure: 1, base; 2, U-shaped bracket; 3, vertical slide rail; 4, positioning mechanism; 41, adjustment part; 411, slideway; 412, first slider; 413, bidirectional threaded rod; 414, first motor; 415, central shaft rod; 416, first limiting roller; 42, upper fixing part; 421, screw rod; 422, second slider; 423, positioning rod; 424, second limiting roller; 43, stabilizing part; 431, supporting telescopic rod; 44, grinding part; 441, electric slide rail; 442, moving slide base; 443, second motor; 444, extending rod; 445, grinding head; 5, driving mechanism; 51, matching part; 511, L-shaped support plate; 512, spline sleeve; 52, driving part; 521, spline shaft; 522, third motor; 6, limiting mechanism; 61, descending part; 611, electric push rod; 612, supporting cross plate; 613, first rolling pressure plate; 614, pressing arc plate; 62, supporting part; 621, sliding cylinder; 622, L-shaped sliding rod; 623, telescopic sleeve; 624, second rolling pressure plate; 63, limiting part; 631, first arc-shaped support block; 632, L-shaped connecting rod; 633, second arc-shaped support block. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figure 1 and Figure 2 , a seamless steel pipe inner wall grinding device, including a base 1, a U-shaped bracket 2 is fixedly installed on the upper end surface of the base 1, a vertical slide rail 3 is fixedly installed on the upper end surface of the base 1 behind the U-shaped bracket 2, and a positioning mechanism 4 for implementing three-point synchronous rolling positioning on the outer wall of the seamless steel pipe is jointly arranged on the base 1 and the vertical slide rail 3; the positioning mechanism 4 includes an adjustment part 41 arranged on the base 1, an upper fixing part 42 for cooperating with the adjustment part 41 to implement positioning adjustment on seamless steel pipes of different sizes is arranged on the vertical slide rail 3, a stabilizing part 43 for using triangular support to stably position the adjustment part 41 and the upper fixing part 42 is arranged on the upper fixing part 42, and a grinding part 44 for grinding the inner wall of the seamless steel pipe is arranged on the base 1.

[0030] Please refer to Figure 1 and Figure 2 , a driving mechanism 5 for providing power for the adjustment part 41 is arranged on the base 1; the driving mechanism 5 includes a matching part 51 arranged on the adjustment part 41, and a driving part 52 cooperating with the matching part 51 is further arranged on the base 1.

[0031] Please refer to Figure 1 , a limiting mechanism 6 for cooperating with the positioning mechanism 4 is arranged on the U-shaped bracket 2; the limiting mechanism 6 includes a descending part 61 arranged on the U-shaped bracket 2 and used for stably pressing the upper fixing part 42 against the upper end of the seamless steel pipe, a supporting part 62 for cooperating with the adjusting part 41 to provide rolling support for the descending part 61 is arranged on the descending part 61, and a limiting part 63 for cooperating with the grinding part 44 is also arranged on the descending part 61.

[0032] Please refer to Figure 1 、 Figure 2 and Figure 4 , the adjusting part 41 includes a slideway 411, a first slider 412, a bidirectional threaded rod 413, a first motor 414, a central shaft rod 415 and a first limiting roller 416. Slideways 411 that are symmetrically arranged front and back with respect to the U-shaped bracket 2 are opened on the upper end surface of the base 1. Left and right symmetric first sliders 412 are slidably installed in the slideways 411. A bidirectional threaded rod 413 that is in threaded connection with the corresponding left and right symmetric first sliders 412 is installed in the rear slideway 411 through a bearing. Two threaded segments with opposite thread directions are arranged on the bidirectional threaded rod 413. The first sliders 412 symmetrically arranged in the slideways 411 are respectively in threaded connection with the two threaded segments. A first motor 414 with an output end fixedly connected to the bidirectional threaded rod 413 is fixedly installed on the base 1. A central shaft rod 415 is installed through the front and rear oppositely arranged first sliders 412 through bearings, and a first limiting roller 416 located between the first sliders 412 is fixedly sleeved on the central shaft rod 415.

[0033] Please refer to Figure 1 and Figure 4 , the upper fixing part 42 includes a screw rod 421, a second slider 422, a positioning rod 423 and a second limiting roller 424. A screw rod 421 perpendicular to the bidirectional threaded rod 413 is rotatably installed on the front end surface of the vertical slide rail 3 through a bearing seat arranged. A second slider 422 in threaded connection with the screw rod 421 is slidably installed on the front end surface of the vertical slide rail 3. A positioning rod 423 that slidably penetrates the second slider 422 is fixedly installed on the front end surface of the vertical slide rail 3. The bidirectional threaded rod 413 and the screw rod 421 are传动连接(这里原文未给出准确英文表述,可根据实际情况补充,比如“driven and connected”) through a first bevel gear set arranged. A second limiting roller 424 is rotatably installed on the front end surface of the second slider 422 through a rotating shaft arranged.

[0034] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, the stabilizing part 43 includes a supporting telescopic rod 431. The left and right ends of the second slider 422 are symmetrically hinged with the supporting telescopic rod 431. The end of the supporting telescopic rod 431 away from the second slider 422 is hinged with the corresponding first slider 412. A stable triangular structure is formed among the second slider 422, the supporting telescopic rods 431 on its left and right sides, the corresponding left and right first sliders 412, and the bidirectional threaded rod 413.

[0035] During specific operation, when grinding the inner wall of the seamless steel pipe, first place the seamless steel pipe to be ground on the upper ends of the first limiting rollers 416 on both sides, so that the two support the seamless steel pipe. Subsequently, start the first motor 414 to drive the bidirectional threaded rod 413 to rotate, thereby driving the corresponding first limiting rollers 416 to approach each other through the first sliders 412 on both sides.

[0036] Meanwhile, the bidirectional threaded rod 413 drives the screw rod 421 to rotate through the first bevel gear set. With the cooperation of the positioning rod 423 restricting the sliding direction, the second slider 422 drives the second limiting roller 424 to descend. The second limiting roller 424 moves synchronously with the first limiting rollers 416 on both sides, and the supporting telescopic rod 431 rotates and expands and contracts adaptively synchronously. When the second limiting roller 424 contacts the upper end of the outer wall of the seamless steel pipe, the positioning of the seamless steel pipe by the second limiting roller 424 and the first limiting rollers 416 on both sides is completed. In this way, three-point synchronous rolling positioning of the outer wall of the seamless steel pipe is implemented, providing evenly distributed support points for the seamless steel pipe to ensure uniform grinding of the inner wall of the seamless steel pipe, and can implement positioning grinding on seamless steel pipes of different sizes, improving the flexibility and adaptability of the production line.

[0037] While the second limiting roller 424 and the first limiting rollers 416 on both sides roll and position the seamless steel pipe, a stable triangular structure is still formed among the second slider 422, the supporting telescopic rods 431 on its left and right sides, the corresponding left and right first sliders 412, and the bidirectional threaded rod 413, providing stable support for the three-point positioning, making the seamless steel pipe not easy to tilt or deform during the grinding process, thus ensuring the stability of the seamless steel pipe during grinding.

[0038] Please refer to Figure 1 , Figure 2 and Figure 5 , the descending part 61 includes an electric push rod 611, a supporting cross plate 612, a first rolling plate 613, and a pressing arc plate 614. The electric push rod 611 is fixedly installed at the upper end of the U-shaped bracket 2. The telescopic end of the electric push rod 611 is fixedly installed with a supporting cross plate 612 located above the second limiting roller 424. The lower end surface of the supporting cross plate 612 is fixedly installed with a first rolling plate 613 through a set support rod. The first rolling plate 613 is located in front of the second limiting roller 424. A pressing arc plate 614 that rolls into contact with the rotating shaft on the second limiting roller 424 is fixedly installed on the support rod.

[0039] See also Figure 1 , Figure 2 and Figure 5 The support part 62 includes a slide 621, an L-shaped slide bar 622, a telescopic sleeve 623 and a second rolling plate 624. The front and rear ends of the support cross plate 612 are fixed and penetrated by the slide 621. The axis of the slide 621 extends from left to right. The left and right ends of the slide 621 are symmetrically and slidably installed with the L-shaped slide bar 622. The vertical section of the L-shaped slide bar 622 is slidably installed with the telescopic sleeve 623. The lower end of the telescopic sleeve 623 is fixedly installed with the second rolling plate 624 located above the first limiting roller 416. The lower end surfaces of the first rolling plate 613, the pressure arc plate 614 and the second rolling plate 624 are all distributed with a plurality of balls (not shown in the figure) in an array manner. The telescopic sleeve 623 is provided with bolts for adjusting the distance between the second rolling plate 624 and the support cross plate 612.

[0040] During specific operation, after the positioning of the seamless steel pipe is completed, the electric push rod 611 is started so that its telescopic end drives the supporting cross plate 612 to descend, and when the first rolling plate 613 is pressed against the upper end of the outer ring wall of the seamless steel pipe, the electric push rod 611 is stopped. At this time, the pressing arc plate 614 applies a downward extrusion force on the front end of the rotating shaft of the second limiting roller 424, so that the second limiting roller 424 can more stably squeeze the seamless steel pipe onto the first limiting roller 416 below. At the same time, the second rolling plate 624 will roll with the first limiting roller 416. The first limiting roller 416 cooperates to provide support for the supporting cross plate 612, so that after the positioning is completed, the positioning of the auxiliary positioning mechanism 4 is performed by downward squeezing, so as to ensure that the seamless steel pipe can be accurately aligned during grinding, reduce the error in the grinding process, and further improve the quality of grinding the inner wall of the seamless steel pipe. At the same time, the pressing action of the arc plate 614 and the second rolling plate 624 also limits the rotating shaft of the second limiting roller 424 and the first limiting roller 416 respectively, and the bolts set on the telescopic sleeve 623 are used to adjust the distance between the second rolling plate 624 and the supporting cross plate 612.

[0041] See also Figure 1 , Figure 2 and Figure 4 The driving part 52 includes a spline shaft 521 and a third motor 522. The spline shaft 521 located behind the rear slide 411 is rotatably installed on the upper end surface of the base 1 through a bearing seat. The third motor 522 with an output end fixedly connected to the spline shaft 521 is fixedly installed on the upper end surface of the base 1.

[0042] See also Figure 1 , Figure 2 and Figure 4The mating part 51 includes an L-shaped support plate 511 and a spline sleeve 512. The spline sleeve 512 is slidably installed on the spline shaft 521 in a left-right symmetrical manner. The L-shaped support plate 511 is installed on the spline sleeve 512 through a bearing. The rear end of the central shaft 415 passes through the horizontal longitudinal section of the L-shaped support plate 511 and is connected to the bearing of the L-shaped support plate 511. The spline sleeve 512 and the corresponding central shaft 415 are connected through a transmission through a second bevel gear set.

[0043] In specific operation, after the positioning of the seamless steel pipe is completed, the third motor 522 is started to rotate with the spline shaft 521, and the spline shaft 521 will rotate synchronously with the spline sleeves 512 on the left and right sides, and the spline sleeves 512 will synchronously rotate the first limiting rollers 416 on both sides through the second bevel gear set, so as to rotate with the seamless steel pipe following the rotation direction of the first limiting rollers 416, and cooperate with the grinding part 44 to perform grinding operations on the inner wall of the seamless steel pipe. During the horizontal movement of the first limiting roller 416, the first limiting roller 416 will drive the spline sleeve 512 to slide left and right on the spline shaft 521 through the L-shaped support plate 511.

[0044] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The grinding part 44 includes an electric slide rail 441, a movable slide seat 442, a second motor 443, an insertion rod 444 and a grinding head 445. The upper end surface of the base 1 is fixedly installed with an electric slide rail 441 located in front of the front slide 411, the movable end of the electric slide rail 441 is fixedly installed with a movable slide seat 442, the upper end of the movable slide seat 442 is fixedly installed with a second motor 443, the rear end surface of the movable slide seat 442 is installed with an insertion rod 444 through a bearing, the insertion rod 444 and the second motor 443 are connected by a first gear set, and the rear end of the insertion rod 444 is fixedly installed with a grinding head 445.

[0045] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 The limiting portion 63 includes a first arc-shaped support block 631, an L-shaped connecting rod 632 and a second arc-shaped support block 633. The first arc-shaped support block 631 located at the rear end of the electric slide rail 441 is fixedly installed on the upper end surface of the base 1. The arc surface of the upper end of the first arc-shaped support block 631 contacts the outer ring wall of the extension rod 444. The front end of the supporting cross plate 612 is fixedly installed with a second arc-shaped support block 633 located directly above the first arc-shaped support block 631 through the L-shaped connecting rod 632. The arc surfaces of the second arc-shaped support block 633 and the first arc-shaped support block 631 that are close to each other are both distributed with a plurality of balls in an array manner.

[0046] During the specific work, after the auxiliary positioning of the seamless steel pipe is completed, the second motor 443 is started to rotate the extension rod 444 through the first gear group, thereby driving the grinding head 445 to rotate, and then the electric slide rail 441 is started to drive the movable slide 442 to move toward the inside of the seamless steel pipe, so that the rotating grinding head 445 continuously moves toward the rear end of the seamless steel pipe, and the grinding head 445 will continuously grind the lower side of the inner wall of the seamless steel pipe, and cooperate with the rotation of the seamless steel pipe, so that the seamless steel pipe continuously changes the position of the inner wall of the steel pipe, thereby completing the grinding of the inner wall of the seamless steel pipe.

[0047] During the process of the supporting cross plate 612 descending, the second arc-shaped support block 633 will fit with the upper end of the first arc-shaped support block 631 through the L-shaped connecting rod 632, so that the second arc-shaped support block 633 and the first arc-shaped support block 631 are combined to provide additional rolling support for the insertion rod 444, thereby avoiding shaking when the insertion rod 444 rotates.

[0048] After grinding is completed, the electric push rod 611 is started in reverse to make the supporting cross plate 612 rise away from the seamless steel pipe, and then the first motor 414 is started in reverse to make the second limiting roller 424 and the first limiting rollers 416 on both sides away from the seamless steel pipe. At this time, the seamless steel pipe that has been ground can be taken out.

[0049] See also Figure 1-5 Working principle: When it is necessary to grind the inner wall of the seamless steel pipe, first place the seamless steel pipe to be ground on the upper ends of the first limiting rollers 416 on both sides, and implement three-point synchronous rolling positioning on the outer ring wall of the seamless steel pipe through the cooperation of the adjustment part 41 and the upper fixed part 42. The stabilizing part 43 provides a triangular stable support for the three-point synchronous rolling positioning, and then start the electric push rod 611 to squeeze the auxiliary positioning mechanism 4 downward through the limiting mechanism 6.

[0050] Then, the third motor 522 is started to synchronously rotate the first limiting rollers 416 on both sides through the driving mechanism 5, thereby causing the seamless steel pipe to rotate in the direction of rotation of the first limiting rollers 416, and then the second motor 443 is started to rotate the grinding head 445, and then the electric slide rail 441 is started to move it with the movable slide 442 into the seamless steel pipe, so that the rotating grinding head 445 continuously moves toward the rear end of the seamless steel pipe, and the grinding head 445 will continuously grind the lower side of the inner wall of the seamless steel pipe, and cooperate with the rotation of the seamless steel pipe, so that the seamless steel pipe continuously changes the position of the inner wall of the steel pipe, thereby completing the grinding of the inner wall of the seamless steel pipe.

[0051] After grinding is completed, the electric push rod 611 is started in reverse to make the supporting cross plate 612 rise away from the seamless steel pipe, and then the first motor 414 is started in reverse to make the second limiting roller 424 and the first limiting rollers 416 on both sides away from the seamless steel pipe. At this time, the seamless steel pipe that has been ground can be taken out.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seamless steel pipe inner wall grinding device, comprising a base (1), characterized in that: A U-shaped bracket (2) is fixedly installed on the upper end surface of the base (1). A vertical slide rail (3) is fixedly installed on the upper end surface of the base (1) and is located behind the U-shaped bracket (2). A positioning mechanism (4) for performing three-point synchronous rolling positioning on the outer ring wall of the seamless steel pipe is jointly provided on the base (1) and the vertical slide rail (3). The positioning mechanism (4) includes an adjustment part (41) arranged on the base (1). An upper positioning part (42) for cooperating with the adjustment part (41) to perform positioning adjustment on seamless steel pipes of different sizes is arranged on the vertical slide rail (3). A stabilizing part (43) for adopting triangular support to stabilize the positioning of the adjustment part (41) and the upper positioning part (42) is arranged on the upper positioning part (42). A grinding part (44) for grinding the inner wall of the seamless steel pipe is arranged on the base (1). A driving mechanism (5) for providing power to the adjustment part (41) is arranged on the base (1). The driving mechanism (5) includes a matching part (51) arranged on the adjustment part (41). A driving part (52) matching with the matching part (51) is further arranged on the base (1). A limiting mechanism (6) matching with the positioning mechanism (4) is arranged on the U-shaped bracket (2). The limiting mechanism (6) includes a descending part (61) arranged on the U-shaped bracket (2) and used for stably pressing the upper positioning part (42) against the upper end of the seamless steel pipe. A supporting part (62) for cooperating with the adjustment part (41) to provide rolling support for the descending part (61) is arranged on the descending part (61). A limiting part (63) for cooperating with the grinding part (44) is further arranged on the descending part (61).

2. The inner wall grinding device of a seamless steel pipe according to claim 1, characterized in that: The adjustment part (41) includes a slideway (411), a first slider (412), a bidirectional threaded rod (413), a first motor (414), a central shaft rod (415) and a first limiting roller (416). Slideways (411) symmetrically arranged before and after the U-shaped bracket (2) are formed on the upper end surface of the base (1). Left and right symmetric first sliders (412) are slidably installed in the slideways (411). A bidirectional threaded rod (413) threadedly connected with the corresponding left and right symmetric first sliders (412) is installed in the rear slideway (411) through bearings. A first motor (414) with an output end fixedly connected to the bidirectional threaded rod (413) is fixedly installed on the base (1). Central shaft rods (415) are jointly installed through bearings between the front and rear oppositely arranged first sliders (412), and a first limiting roller (416) located between the first sliders (412) is fixedly sleeved on the central shaft rod (415).

3. A seamless steel pipe inner wall grinding device according to claim 2, characterized in that: The upper fixed part (42) comprises a screw (421), a second slider (422), a positioning rod (423) and a second limiting roller (424); the front end surface of the vertical slide rail (3) is rotatably mounted with a screw (421) perpendicular to the bidirectional threaded rod (413) via a set bearing seat; the front end surface of the vertical slide rail (3) is slidably mounted with a second slider (422) threadedly connected to the screw (421); the front end surface of the vertical slide rail (3) is fixedly mounted with a positioning rod (423) slidingly penetrating the second slider (422); the bidirectional threaded rod (413) and the screw (421) are transmission-connected via a set first bevel gear set; the front end surface of the second slider (422) is rotatably mounted with a second limiting roller (424) via a set rotating shaft.

4. A seamless steel pipe inner wall grinding device according to claim 3, characterized in that: The stabilizing portion (43) comprises a supporting telescopic rod (431), the left and right ends of the second sliding block (422) are symmetrically hinged with the supporting telescopic rods (431), one end of the supporting telescopic rod (431) away from the second sliding block (422) is hinged to the corresponding first sliding block (412), and the second sliding block (422) and the supporting telescopic rods (431) on its left and right sides, the corresponding left and right two first sliding blocks (412) and the bidirectional threaded rod (413) form a stable triangular structure.

5. The inner wall grinding device of a seamless steel pipe according to claim 3, characterized in that: The grinding part (44) comprises an electric slide rail (441), a movable slide seat (442), a second motor (443), an insertion rod (444) and a grinding head (445); the upper end surface of the base (1) is fixedly mounted with an electric slide rail (441) located in front of the front slideway (411); the movable end of the electric slide rail (441) is fixedly mounted with a movable slide seat (442); the upper end of the movable slide seat (442) is fixedly mounted with a second motor (443); the rear end surface of the movable slide seat (442) is mounted with an insertion rod (444) via a bearing; the insertion rod (444) and the second motor (443) are connected in transmission via a first gear set; the rear end of the insertion rod (444) is fixedly mounted with a grinding head (445).

6. The inner wall grinding device of a seamless steel pipe according to claim 2, characterized in that: The driving part (52) comprises a spline shaft (521) and a third motor (522); the upper end surface of the base (1) is rotatably mounted with the spline shaft (521) located behind the rear slideway (411) via a bearing seat; the upper end surface of the base (1) is fixedly mounted with the third motor (522) whose output end is fixedly connected to the spline shaft (521).

7. The inner wall grinding device of a seamless steel pipe according to claim 6, characterized in that: The mating portion (51) comprises an L-shaped support plate (511) and a spline sleeve (512); a left-right symmetrical spline sleeve (512) is slidably mounted on the spline shaft (521); the L-shaped support plate (511) is mounted on the spline sleeve (512) via a bearing; the rear end of the central shaft (415) passes through the horizontal longitudinal section of the L-shaped support plate (511) and is connected to the bearing of the L-shaped support plate (511); the spline sleeve (512) and the corresponding central shaft (415) are connected in transmission via a second bevel gear set.

8. The inner wall grinding device of a seamless steel pipe according to claim 5, characterized in that: The descending part (61) includes an electric push rod (611), a supporting cross plate (612), a first rolling pressure plate (613) and a pressing arc plate (614). An electric push rod (611) is fixedly installed at the upper end of the U-shaped bracket (2). The telescopic end of the electric push rod (611) is fixedly installed with a supporting cross plate (612) located above the second limiting roller (424). The lower end surface of the supporting cross plate (612) is fixedly installed with a first rolling pressure plate (613) through a set of supporting rods. The first rolling pressure plate (613) is located in front of the second limiting roller (424). A pressing arc plate (614) that is in rolling contact with the rotating shaft on the second limiting roller (424) is fixedly installed on the supporting rod.

9. The inner wall grinding device of a seamless steel pipe according to claim 8, characterized in that: The supporting part (62) includes a sliding cylinder (621), an L-shaped sliding rod (622), a telescopic sleeve (623) and a second rolling pressure plate (624). Sliding cylinders (621) are fixedly installed at both the front and rear ends of the supporting cross plate (612) and penetrate through it. The axis of the sliding cylinder (621) extends from left to right. L-shaped sliding rods (622) are symmetrically and slidably installed at both the left and right ends of the sliding cylinder (621). A telescopic sleeve (623) is slidably installed on the vertical section of the L-shaped sliding rod (622). The lower end of the telescopic sleeve (623) is fixedly installed with a second rolling pressure plate (624) located above the first limiting roller (416). A number of balls are distributed in an array on the lower end surfaces of the first rolling pressure plate (613), the pressing arc plate (614) and the second rolling pressure plate (624). A bolt for adjusting the distance between the second rolling pressure plate (624) and the supporting cross plate (612) is provided on the telescopic sleeve (623).

10. The inner wall grinding device of a seamless steel pipe according to claim 8, characterized in that: The limiting part (63) includes a first arc-shaped support block (631), an L-shaped connecting rod (632) and a second arc-shaped support block (633). A first arc-shaped support block (631) is fixedly installed on the upper end surface of the base (1) at the rear end of the electric slide rail (441). The upper arc surface of the first arc-shaped support block (631) is in contact with the outer wall of the extending rod (444). The front end of the supporting cross plate (612) is fixedly installed with a second arc-shaped support block (633) located directly above the first arc-shaped support block (631) through a set of L-shaped connecting rods (632). A number of balls are distributed in an array on the arc surfaces of the second arc-shaped support block (633) and the first arc-shaped support block (631) that are close to each other.

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