Micro-expanding forming device for hot-rolled seamless steel pipe with extra-thick wall

Abstract

The utility model discloses a micro-expanding forming device for an extra-thick-wall hot-rolled seamless steel pipe, relates to the technical field of forming devices, and aims to solve the problem that in the expanding machining process of the seamless steel pipe in the prior art, expanding operation of a next steel pipe can be carried out only after expanding and blanking of the current steel pipe are completed, and the production efficiency is high. And therefore, the overall processing efficiency is relatively low when the seamless steel pipes are processed in batches. Side boxes are symmetrically and fixedly installed on one side of the front end and one side of the rear end of the bottom box respectively, the side boxes and the bottom box are arranged to be of an integrated structure, brackets are arranged above the bottom box and the side box located at the front end, each bracket comprises a table plate, two placing blocks and a positioning plate, the placing blocks are arranged above the table plate, and the positioning plates are arranged above the table plate. A first arc-shaped groove is formed in the upper end face of the placing block, the positioning plate is fixedly installed on one side of the upper portion of the table plate, and a connecting plate is installed between the two brackets.

Description

Technical Field

[0001] The utility model relates to the technical field of forming devices, in particular to a micro-diameter expansion forming device for extra-thick-wall hot-rolled seamless steel pipes. Background Art

[0002] Extra-thick-walled hot-rolled seamless steel pipe is a steel pipe with a hollow cross-section and no seams around the periphery. Extra-thick-walled hot-rolled seamless steel pipe is made of a variety of materials, including ordinary carbon structural steel, carbon structural steel, and alloy structural steel. Due to its unique physical properties and wide range of applications, extra-thick-walled hot-rolled seamless steel pipe plays an important role in many fields such as construction, automobile manufacturing, and industry. In the production process of seamless steel pipes, in order to make the inner diameter reach the standard aperture, the seamless steel pipes with substandard inner diameters are often slightly expanded through the expansion forming device.

[0003] For example, patent publication number CN111069447A (A seamless steel pipe cold expansion device and the same) comprises a workbench, a first hydraulic cylinder is fixedly mounted on the upper surface of the workbench, a first mounting plate is fixedly mounted on the output end of the first hydraulic cylinder, a threaded rod is fixedly mounted on the side of the first mounting plate away from the output end of the first hydraulic cylinder, an expansion die is threadedly connected to one end of the threaded rod away from the first mounting plate, a reducer is fixedly connected to the end of the expansion die away from the threaded rod, and a fixing frame is fixedly mounted on the upper surface of the workbench on the side away from the first hydraulic cylinder.

[0004] Although the above-mentioned prior art equipment is relatively convenient in use and simple for staff to operate, during the diameter expansion process of seamless steel pipes, the diameter expansion operation of the next steel pipe can only be started after the current steel pipe is expanded and unloaded, resulting in relatively low overall processing efficiency when batch processing seamless steel pipes; therefore, the market urgently needs to develop a micro-diameter expansion forming device for extra-thick-walled hot-rolled seamless steel pipes to help people solve the existing problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a micro-diameter expansion forming device for extra-thick-walled hot-rolled seamless steel pipes, so as to solve the problem raised in the above-mentioned background technology that during the diameter expansion process of seamless steel pipes, the diameter expansion operation of the next steel pipe can only be started after the previous steel pipe is completed and unloaded, resulting in relatively low overall processing efficiency when batch processing seamless steel pipes.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a micro-expansion forming device for extra-thick-walled hot-rolled seamless steel pipes, comprising a bottom box, side boxes are symmetrically fixedly installed on one side of the front end and the rear end of the bottom box, the side boxes and the bottom box are arranged as an integrated structure, the bottom box and the side box above the front end are provided with brackets, the brackets include a table plate, a placement block and a positioning plate, there are two placement blocks, and the placement blocks are arranged above the table plate, an arc-shaped groove is provided on the upper end surface of the placement block, the positioning plate is fixedly installed on one side above the table plate, and a connecting plate is installed between the two brackets.

[0007] Preferably, the interior of the bottom box is provided with an inner cavity 2, the interior of the inner cavity 2 of the bottom box is provided with a ball screw, a sliding block is slidably installed on the outer side of the ball screw, a transmission plate is fixedly installed above the sliding block, and a guide strip is fixedly installed above the bottom box, and the guide strip slides through the table plate.

[0008] Preferably, a fixed vertical plate is fixedly installed on one side above the bottom box, a fixed top plate is fixedly installed above one side of the fixed vertical plate, a pressure plate is provided below the fixed top plate, and pressure blocks are symmetrically fixedly installed on both sides below the pressure plate, and an arc-shaped groove 2 is provided on the lower end surface of the pressure block.

[0009] Preferably, a hydraulic cylinder 1 is fixedly installed above the fixed top plate, and the piston rod end of the hydraulic cylinder 1 slides through the fixed top plate and is fixedly connected to the pressure plate.

[0010] Preferably, guide columns are symmetrically provided on both sides of the hydraulic cylinder 1, and the lower ends of the guide columns slide through the fixed top plate and are fixedly connected to the pressure plate.

[0011] Preferably, a fixed plate is provided on the other side above the bottom box, a pipe expansion die is fixedly installed on one side of the fixed plate, an inner cavity 1 is provided inside the bottom box, and the lower end of the fixed plate extends into the inner cavity 1.

[0012] Preferably, a hydraulic cylinder 2 is fixedly installed inside the inner cavity 1 of the bottom box, and the piston rod end of the hydraulic cylinder 2 is fixedly connected to the fixed plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model provides two synchronously movable brackets, so that while the previous steel pipe is undergoing micro-diameter expansion, the next steel pipe to be processed can be pre-placed on the other bracket. After the processing of the previous steel pipe is completed, the steel pipe to be processed can be quickly moved to the processing area by driving the synchronous movement of the brackets, and a new micro-diameter expansion operation can be started without interrupting the processing flow. This improves the processing efficiency of batch processing of seamless steel pipes, significantly reduces waiting time, ensures the continuity and efficiency of the production process, and thus solves the problem of low overall processing efficiency caused by sequential operations in traditional processing methods.

[0015] 2. The utility model realizes the precise and smooth movement of the bracket through the cooperation of the ball screw and the sliding block, which not only improves the stability of the seamless steel pipe during the processing, but also ensures the accuracy of the processing. At the same time, the setting of the guide strips and long grooves further enhances the guiding performance of the bracket movement, making the entire processing process more reliable and stable.

[0016] 3. The utility model provides a pressure plate, a pressure block and a hydraulic cylinder 1, so that the telescopic movement of the piston rod of the hydraulic cylinder 1 can drive the lifting and lowering movement of the fixed top plate, thereby conveniently driving the pressure block downward to assist in fixing the position of the seamless steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a micro-diameter expansion forming device for an extra-thick-walled hot-rolled seamless steel pipe according to the present invention;

[0018] Figure 2 This is a schematic structural diagram of the bracket of the present utility model;

[0019] Figure 3 It is a cross-sectional view of the bottom box of the present utility model;

[0020] Figure 4 It is an enlarged schematic diagram of part A of the present invention.

[0021] In the figure: 1. Bottom box; 101. Inner cavity one; 102. Inner cavity two; 2. Side box; 3. Fixed plate; 4. Tube expansion mold; 5. Bracket; 501. Tabletop; 502. Placement block; 503. Positioning plate; 6. Connecting plate; 7. Pressing plate; 8. Pressing block; 9. Hydraulic cylinder one; 10. Guide column; 11. Fixed vertical plate; 12. Fixed top plate; 13. Guide strip; 14. Hydraulic cylinder two; 15. Ball screw; 16. Sliding block; 17. Transmission plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-4 , the utility model provides an embodiment: a micro-diameter expansion forming device for extra thick-walled hot-rolled seamless steel pipe, comprising a bottom box 1, with side boxes 2 symmetrically fixedly installed on one side of the front end and the rear end of the bottom box 1, and the side boxes 2 and the bottom box 1 are set as an integrated structure, and the bottom box 1 and the front end side box 2 are both provided with brackets 5, and the bracket 5 is used to place the extra thick-walled hot-rolled seamless steel pipe, the bracket 5 includes two placing blocks 502, and the placing blocks 502 are provided above the table 501, and an arc-shaped groove 1 is provided on the upper end surface of the placing block 502, and the positioning plate 503 is fixedly installed on one side above the table 501, and a connecting plate 6 is installed between the two brackets 5, and the connecting plate 6 is fixedly connected to the table 501 of the two brackets 5, so that the two brackets 5 can move synchronously.

[0024] During use, by setting up two synchronously movable brackets 5, the next seamless steel pipe to be processed can be placed on the other bracket 5 during the micro-expansion processing of the previous extra-thick-walled hot-rolled seamless steel pipe. After the processing of the previous seamless steel pipe is completed, by driving the movement of the two brackets 5, the next seamless steel pipe can be directly moved to the processing area for micro-expansion processing, and at the same time, the previous seamless steel pipe can be unloaded and the subsequent seamless steel pipe can be loaded, so there is no need to interrupt the entire processing process, which improves the processing efficiency of batch processing of seamless steel pipes, reduces waiting time, and makes the overall production process smoother and more efficient.

[0025] Furthermore, the interior of the bottom box 1 is provided with an inner cavity 2 102, the front end and the rear end of the inner cavity 2 102 respectively extend into the interiors of the two side boxes 2, and a ball screw 15 is provided inside the inner cavity 2 102 of the bottom box 1. Both ends of the ball screw 15 extend into the inner cavity 2 102 of the side box 2 and are rotatably connected to the side box 2. A drive motor for the ball screw 15 is provided behind the side box 2 at the rear end, and a sliding block 16 is slidably installed on the outer side of the ball screw 15. A transmission plate 17 is fixedly installed above the sliding block 16. There are two sliding blocks 16, and the transmission plates 17 above the two sliding blocks 16 are respectively connected to the two brackets 5. The table 501 is fixedly connected, and a guide strip 13 is fixedly installed on the top of the bottom box 1. The guide strip 13 slides through the table 501, and a long groove matching the guide strip 13 is provided under the table 501, so that the table 501 can slide along the direction of the guide strip 13. Through the cooperation of the ball screw 15 and the sliding block 16, the accurate and smooth movement of the bracket 5 is achieved, which not only improves the stability of the seamless steel pipe during the processing, but also ensures the accuracy of the processing. At the same time, the setting of the guide strip 13 and the long groove further enhances the guiding performance of the bracket movement, making the entire processing process more reliable and stable.

[0026] Furthermore, a fixed vertical plate 11 is fixedly installed on one side above the bottom box 1, a fixed top plate 12 is fixedly installed on the upper side of the fixed vertical plate 11, a pressure plate 7 is provided below the fixed top plate 12, and pressure blocks 8 are symmetrically fixedly installed on both sides below the pressure plate 7. An arc-shaped groove 2 is provided on the lower end surface of the pressure block 8. The position of the pressure block 8 corresponds to the position of the placement block 502. A hydraulic cylinder 9 is fixedly installed above the fixed top plate 12. The hydraulic cylinder 9 is externally connected to a hydraulic pump oil equipment. The piston rod end of the hydraulic cylinder 9 slides through the fixed top plate 12 and is fixedly connected to the pressure plate 7, so that the telescopic movement of the piston rod of the hydraulic cylinder 9 can drive the lifting and lowering movement of the fixed top plate 12, which is convenient for driving the pressure block 8 to move downward to assist in fixing the position of the seamless steel pipe.

[0027] Furthermore, guide columns 10 are symmetrically arranged on both sides of the hydraulic cylinder 9. The lower ends of the guide columns 10 slide through the fixed top plate 12 and are fixedly connected to the pressure plate 7. The setting of the guide columns 10 enhances the stability of the hydraulic cylinder 9 drive and effectively prevents the pressure plate 7 from shifting or tilting during the lifting process, thereby ensuring the fixing effect and processing accuracy of the seamless steel pipe.

[0028] Furthermore, a fixed plate 3 is provided on the other side above the bottom box 1, and a pipe expansion die 4 is fixedly installed on one side of the fixed plate 3. An inner cavity 101 is provided inside the bottom box 1, and the lower end of the fixed plate 3 extends into the inner cavity 101. A hydraulic cylinder 2 14 is fixedly installed inside the inner cavity 101 of the bottom box 1. The hydraulic cylinder 2 14 is externally connected to a hydraulic pump oil equipment, and the piston rod end of the hydraulic cylinder 2 14 is fixedly connected to the fixed plate 3, so that the fixed plate 3 can be driven to move horizontally by driving the piston rod of the hydraulic cylinder 2 14 to move telescopically, which is beneficial to the micro-expansion operation of the seamless steel pipe.

[0029] Working principle: When in use, two synchronously movable brackets 5 are set up, and each bracket 5 is equipped with a placement block 502 and a positioning plate 503 for placing seamless steel pipes. During the processing, when the current seamless steel pipe is undergoing a micro-expansion operation at the pipe expansion die, the next seamless steel pipe to be processed can be placed on another idle bracket 5. By driving the ball screw 15 and the sliding block 16 thereon, the two brackets 5 can move smoothly along the guide strip 13, which is conducive to the continuous processing of seamless steel pipes. At the same time, when the seamless steel pipe is undergoing micro-expansion, the hydraulic cylinder 19 pressure plate 7 drives the pressure block 8 to move downward, and the seamless steel pipe placed on the placement block 502 is assisted in fixing the position to ensure stability during the processing.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A micro-diameter expansion forming device for ultra-thick-walled hot-rolled seamless steel pipes, comprising a bottom box (1), characterized in that: Side boxes (2) are symmetrically fixedly installed on one side of the front end and the rear end of the bottom box (1), and the side boxes (2) and the bottom box (1) are set as an integrated structure. The bottom box (1) and the upper part of the side box (2) at the front end are both provided with a bracket (5), and the bracket (5) includes a table (501), a placement block (502) and a positioning plate (503). There are two placement blocks (502), and the placement blocks (502) are arranged above the table (501). An arc-shaped groove is provided on the upper end surface of the placement block (502). The positioning plate (503) is fixedly installed on one side above the table (501). A connecting plate (6) is installed between the two brackets (5).

2. The micro-diameter expansion forming device for ultra-thick-walled hot-rolled seamless steel pipe according to claim 1, characterized in that: The interior of the bottom box (1) is provided with an inner cavity 2 (102), and the interior of the inner cavity 2 (102) of the bottom box (1) is provided with a ball screw (15), a sliding block (16) is slidably installed on the outer side of the ball screw (15), a transmission plate (17) is fixedly installed above the sliding block (16), and a guide strip (13) is fixedly installed above the bottom box (1), and the guide strip (13) slides through the table (501).

3. The micro-diameter expansion forming device for ultra-thick-walled hot-rolled seamless steel pipe according to claim 1, characterized in that: A fixed vertical plate (11) is fixedly installed on one side above the bottom box (1), a fixed top plate (12) is fixedly installed above one side of the fixed vertical plate (11), a pressing plate (7) is provided below the fixed top plate (12), and pressing blocks (8) are symmetrically fixedly installed on both sides below the pressing plate (7), and arc-shaped groove 2 is provided on the lower end surface of the pressing block (8).

4. The micro-diameter expansion forming device for ultra-thick-walled hot-rolled seamless steel pipe according to claim 3, characterized in that: A hydraulic cylinder (9) is fixedly installed above the fixed top plate (12), and the piston rod end of the hydraulic cylinder (9) slides through the fixed top plate (12) and is fixedly connected to the pressure plate (7).

5. The micro-diameter expansion forming device for ultra-thick-walled hot-rolled seamless steel pipe according to claim 4, characterized in that: Guide pillars (10) are symmetrically arranged on both sides of the hydraulic cylinder (9), and the lower ends of the guide pillars (10) slide through the fixed top plate (12) and are fixedly connected to the pressure plate (7).

6. The micro-diameter expansion forming device for ultra-thick-walled hot-rolled seamless steel pipe according to claim 1, characterized in that: A fixed plate (3) is provided on the other side above the bottom box (1), a tube expansion die (4) is fixedly installed on one side of the fixed plate (3), an inner cavity (101) is provided inside the bottom box (1), and the lower end of the fixed plate (3) extends into the interior of the inner cavity (101).

7. The micro-diameter expansion forming device for ultra-thick-walled hot-rolled seamless steel pipe according to claim 6, characterized in that: A hydraulic cylinder 2 (14) is fixedly installed inside the inner cavity 1 (101) of the bottom box (1), and the piston rod end of the hydraulic cylinder 2 (14) is fixedly connected to the fixed plate (3).

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