Automatic knurling device of seamless steel pipe perforating machine

Abstract

The invention belongs to the technical field of perforating machines in seamless steel pipe production, and particularly discloses an automatic knurling device of a seamless steel pipe perforating machine, which comprises a rotary drum box, an ejector rod is arranged in the rotary drum box, one end of the ejector rod is fixedly connected with an ejector head, and transmission shafts are symmetrically inserted and rotationally connected in the rotary drum box and are symmetrically mounted in the rotary drum box through bearings; through connection of the connecting rod, the driving cylinder pulls the connecting seat to slide on the sliding plate, so that the knurling wheel can move along the inclined plane of the roller, the electric push rod accurately adjusts the position between the knurling wheel and the roller, accurate control over the feeding amount of the knurling wheel is achieved, and the transmission shaft is used for driving the roller to rotate so as to achieve online knurling and grooving of the roller. The knurling wheel is arranged on the roller, so that friction force during billet punching is improved, roller replacement frequency is reduced, equipment operation rate is improved, front clamping accidents caused by insufficient friction force are reduced, when working conditions change and grooving is needed, only the knurling wheel needs to be replaced with the grooving tool bit, and meanwhile the online knurling and grooving functions of the punching roller are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of piercing mills in seamless steel pipe production, and particularly relates to an automatic knurling device for a seamless steel pipe piercing mill. Background Art

[0002] In seamless steel pipe production, the piercing of the steel billet is the first hot deformation process of the metal. The speed of the piercing rhythm is of great significance to the subsequent production rhythm. The piercing rolls, as extremely important tools and dies in the piercing process, wear out relatively quickly. It takes 4 to 5 hours to replace them once. After wear, the friction between the piercing rolls and the billet decreases, and the billet is not easily bitten in, which easily causes "front jamming" accidents, directly affecting production efficiency. Only by replacing the piercing rolls can it be solved. If certain measures can be taken to realize automatic on-line knurling after the piercing rolls are worn, the stability of steel billet piercing can be improved, the downtime can be greatly reduced, and the production efficiency can be improved. Summary of the Invention

[0003] The purpose of the invention is to solve the deficiencies existing in the prior art, and to provide an automatic knurling device for a seamless steel pipe piercing mill.

[0004] To achieve the above object, the invention provides an automatic knurling device for a seamless steel pipe piercing mill, including a drum box. A push rod is arranged in the drum box. One end of the push rod is fixedly connected with a push head. Drive shafts are symmetrically inserted and rotatably connected in the drum box, and the drive shafts are symmetrically installed inside the drum box through bearings. A rolling roll is fixedly connected to the drive shaft. Drive cylinders are symmetrically and fixedly installed in the drum box. Slide plates are symmetrically and fixedly connected in the drum box. A connecting rod is fixedly connected to the output end of the drive cylinder. A sliding seat is slidably installed on the slide plate, and the sliding seat is fixedly connected with the connecting rod. A connecting component is arranged on the sliding seat, and a knurling wheel is arranged on the connecting component; The connecting component is used to adjust the feed amount of the knurling wheel.

[0005] In the above technical solution, further, the connecting component includes a connecting seat fixedly connected to the sliding seat. An installation hole is formed in the connecting seat. An electric push rod is fixedly installed in the installation hole. A covering plate is fixedly connected to the output end of the electric push rod. A clamping seat is fixedly connected to the bottom of the covering plate. Insert blocks are symmetrically arranged on the clamping seat, and the insert blocks are fixedly connected to the knurling wheel.

[0006] In the above technical solution, further, first fixing plates are symmetrically and fixedly connected to the connecting seat. Guide rods are symmetrically and fixedly connected to the first fixing plates. The guide rods are inserted into the covering plate and slidably connected. The ends of the guide rods are commonly fixedly connected with a second fixing plate. A first spring is sleeved on the guide rods. An electromagnet is fixedly installed on the top of the second fixing plate. A magnetic block is fixedly connected inside the covering plate, and the magnetic block is inserted into the electromagnet.

[0007] In the above technical solution, further, a threaded column is fixedly connected to the card seat, an adjusting wheel is screwed on the threaded column, a movable column is rotatably connected to the top of the adjusting wheel, a push block is fixedly connected to the top of the movable column, two inclined blocks are symmetrically and slidably connected in the card seat, a plug rod is fixedly connected to one side of each inclined block, and the plug rod is inserted outside the card seat and is slidably connected.

[0008] In the above technical solution, further, a second spring is symmetrically and fixedly connected between the inclined blocks.

[0009] In the above technical solution, further, evenly distributed anti-slip grooves are formed in the adjusting wheel.

[0010] In the above technical solution, further, the plug rod is inserted and slidably connected with the plug block.

[0011] Compared with the prior art, the present invention has the following beneficial effects: Through the connection of the connecting rod, the driving cylinder pulls the connecting seat to slide on the sliding plate, so that the knurling wheel can move along the inclined surface of the rolling mill roll. The electric push rod can accurately adjust the position between the knurling wheel and the rolling mill roll, thereby realizing the precise control of the feed amount of the knurling wheel. The transmission shaft drives the rolling mill roll to rotate to realize the on-line knurling and grooving of the rolling mill roll, so as to increase the friction force during the piercing of the billet, reduce the replacement frequency of the rolling mill roll, improve the equipment operation rate, and at the same time reduce the "front jam" accident caused by insufficient friction force. When grooving is required due to changes in working conditions, the knurling wheel can be replaced with a grooving cutter head; When the electromagnet is energized, it strongly adsorbs the magnetic block, so that a tight connection is formed between the cladding plate and the second fixing plate, thereby greatly improving the support stability of the knurling wheel. In the past, if the knurling wheel was not firmly clamped, it was very easy to appear a shaking phenomenon during the high-speed rotating knurling process. Once the knurling wheel shakes, the contact with the surface of the rolling mill roll will be uneven, which will cause serious quality problems such as uneven depth and spacing of the processed patterns, greatly reducing the product quality and qualification rate. However, through the adsorption effect of the electromagnet on the magnetic block, it can ensure that the knurling wheel always maintains a stable state during the entire knurling process, achieves uniform and stable contact with the surface of the rolling mill roll, ensures that the depth and spacing of the knurling patterns are uniform, the pattern clarity is high, and also improves the precision and efficiency of the knurling process; When the operator rotates the adjusting wheel, the movable column rotatably connected to the top of the adjusting wheel converts the rotational motion of the adjusting wheel into the linear motion of the movable column, thereby driving the movable column to move up and down. Driven by the movable column, the push block can exert a thrust on the inclined block inside the clamping seat. Due to the special shape design of the inclined block, its sliding in the clamping seat will generate a horizontal component force, which pushes the insertion rod to move outward, making the connection between the insertion rod and the insertion block tighter, so as to realize the firm clamping of the knurling wheel. When the push block pushes the inclined block to move outward to realize clamping, the second spring will be compressed and store elastic potential energy. When it is necessary to release the clamping, relying on the elastic potential energy stored by itself, the inclined block can be quickly reset. The reset of the inclined block drives the insertion rod to move inward, so as to easily release the clamping of the knurling wheel. The whole operation process is simple, convenient and efficient, which is convenient for replacing the knurling wheel and the grooving tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. is a schematic structural diagram of an automatic knurling device for a seamless steel pipe piercing mill proposed by the present invention; Figure 2 FIG. is a front view of the structure of an automatic knurling device for a seamless steel pipe piercing mill proposed by the present invention; Figure 3 FIG. is a schematic structural diagram of a connection component of an automatic knurling device for a seamless steel pipe piercing mill proposed by the present invention; Figure 4 FIG. is a schematic structural diagram of the internal structure of a covering plate of an automatic knurling device for a seamless steel pipe piercing mill proposed by the present invention; Figure 5 FIG. is a schematic structural diagram of the internal structure of a clamping seat of an automatic knurling device for a seamless steel pipe piercing mill proposed by the present invention; Figure 6 FIG. is a schematic structural diagram of the position of a second spring of an automatic knurling device for a seamless steel pipe piercing mill proposed by the present invention.

[0013] In the figure: 1, drum box; 2, ejector rod; 3, ejector head; 4, transmission shaft; 5, bearing; 6, roll; 7, drive cylinder; 8, slide plate; 9, connecting rod; 10, slide seat; 11, connection component; 12, connection seat; 13, electric push rod; 14, mounting hole; 15, first fixing plate; 16, guide rod; 17, second fixing plate; 18, first spring; 19, covering plate; 20, clamping seat; 21, knurling wheel; 22, insertion block; 23, electromagnet; 24, magnetic block; 25, movable column; 26, adjusting wheel; 27, push block; 28, second spring; 29, inclined block; 30, insertion rod; 31, threaded column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] As Figures 1-6 shown, a seamless steel pipe automatic knurling device includes a drum box 1. Inside the drum box 1, there is a push rod 2. One end of the push rod 2 is fixedly connected to a push head 3. Inside the drum box 1, drive shafts 4 are symmetrically inserted and rotatably connected. The drive shafts 4 are symmetrically installed inside the drum box 1 through bearings 5. A rolling roller 6 is fixedly connected to the drive shafts 4. Inside the drum box 1, drive cylinders 7 are symmetrically and fixedly installed. Inside the drum box 1, there are symmetrically and fixedly connected slide plates 8. A connecting rod 9 is fixedly connected to the output end of the drive cylinder 7. A sliding seat 10 is slidably installed on the slide plate 8, and the sliding seat 10 is fixedly connected to the connecting rod 9. A connecting component 11 is arranged on the sliding seat 10. A knurling wheel 21 is arranged on the connecting component 11. The connecting component 11 is used to adjust the feed amount of the knurling wheel 21. The connecting component 11 includes a connecting seat 12 fixedly connected to the sliding seat 10. An installation hole 14 is formed in the connecting seat 12. An electric push rod 13 is fixedly installed in the installation hole 14. A covering plate 19 is fixedly connected to the output end of the electric push rod 13. A clamping seat 20 is fixedly connected to the bottom of the covering plate 19. Insert blocks 22 are symmetrically arranged on the clamping seat 20, and the insert blocks 22 are fixedly connected to the knurling wheel 21. Through the connection of the connecting rod 9, the drive cylinder 7 pulls the connecting seat 12 to slide on the slide plate 8, so that the knurling wheel 21 can move along the inclined surface of the rolling roller 6. The electric push rod 13 can accurately adjust the position between the knurling wheel 21 and the rolling roller 6, thereby realizing the precise control of the feed amount of the knurling wheel 21. The drive shaft 4 drives the rolling roller 6 to rotate to realize the on-line knurling and grooving of the rolling roller 6, so as to increase the friction during the piercing of the steel billet, reduce the replacement frequency of the rolling roller 6, improve the equipment operation rate, and at the same time reduce the "front jamming" accident caused by insufficient friction. When the working condition changes and grooving is required, the knurling wheel 21 can be replaced with a grooving cutter head.

[0016] Symmetrically and fixedly connected to the connecting seat 12 are first fixing plates 15. Symmetrically and fixedly connected to the first fixing plates 15 are guide rods 16. The guide rods 16 are inserted through and slidably connected to the covering plate 19. The ends of the guide rods 16 are commonly and fixedly connected to a second fixing plate 17. A first spring 18 is sleeved on the guide rods 16. An electromagnet 23 is fixedly installed on the top of the second fixing plate 17. A magnetic block 24 is fixedly connected inside the covering plate 19, and the magnetic block 24 is inserted into the electromagnet 23. When the electromagnet 23 is powered on, it strongly adsorbs the magnetic block 24, forming a tight connection between the covering plate 19 and the second fixing plate 17, thereby greatly improving the support stability of the knurling wheel 21. In the past, if the knurling wheel 21 was not firmly clamped, during the high-speed rotation knurling process, it was extremely easy to have a shaking phenomenon. Once the knurling wheel 21 shakes, it will cause uneven contact with the surface of the rolling mill 6, resulting in serious quality problems such as uneven depths and unequal spacings of the processed patterns, greatly reducing the product quality and qualification rate. However, through the adsorption effect of the electromagnet 23 on the magnetic block 24, it can ensure that the knurling wheel 21 always maintains a stable state throughout the knurling process, achieving uniform and stable contact with the surface of the rolling mill 6, ensuring that the depth and spacing of the knurling patterns are uniform and consistent, with high pattern clarity, and also improving the accuracy and efficiency of the knurling process.

[0017] Fixedly connected to the clamping seat 20 is a threaded column 31. Threaded on the threaded column 31 is an adjusting wheel 26. Rotatably connected to the top of the adjusting wheel 26 is a movable column 25. Fixedly connected to the top of the movable column 25 is a push block 27. Symmetrically and slidably connected inside the clamping seat 20 are inclined blocks 29. Fixedly connected to one side of the inclined blocks 29 is an insertion rod 30, and the insertion rod 30 is inserted through and slidably connected to the outside of the clamping seat 20. The insertion rod 30 is inserted through and slidably connected to the insertion block 22. Symmetrically and fixedly connected between the inclined blocks 29 is a second spring 28. When the operator rotates the adjusting wheel 26, the movable column 25 rotatably connected to the top of the adjusting wheel 26 converts the rotational motion of the adjusting wheel 26 into the linear motion of the movable column 25, thereby driving the movable column 25 to move up and down. Driven by the movable column 25, the push block 27 can exert a thrust on the inclined blocks 29 inside the clamping seat 20. Due to the special shape design of the inclined blocks 29, their sliding inside the clamping seat 20 will generate a horizontal component force, which pushes the insertion rod 30 to move outward, making the connection between the insertion rod 30 and the insertion block 22 tighter, thereby achieving a firm clamping of the knurling wheel 21. When the push block 27 pushes the inclined blocks 29 to move outward for clamping, the second spring 28 will be compressed and store elastic potential energy. When it is necessary to release the clamping, relying on the elastic potential energy stored by itself, the inclined blocks 29 quickly reset, and the reset of the inclined blocks 29 drives the insertion rod 30 to move inward, thus easily releasing the clamping of the knurling wheel 21. The entire operation process is simple, convenient, and efficient, thereby facilitating the replacement of the knurling wheel 21 and the grooving tool.

[0018] The adjusting wheel 26 is provided with uniformly distributed friction-increasing openings. These friction-increasing openings are uniformly distributed on the adjusting wheel 26, increasing the contact area and surface roughness, and making adjustment more convenient.

[0019] Working principle: Through the connection of the connecting rod 9, the driving cylinder 7 pulls the connecting seat 12 to slide on the slide plate 8, so that the knurling wheel 21 can move along the inclined surface of the rolling roll 6. The electric push rod 13 can accurately adjust the position between the knurling wheel 21 and the rolling roll 6, thereby realizing the precise control of the feed amount of the knurling wheel 21. The transmission shaft 4 drives the rolling roll 6 to rotate to realize the on-line knurling and grooving of the rolling roll 6, so as to increase the friction during the piercing of the billet, reduce the replacement frequency of the rolling roll 6, improve the equipment operation rate, and at the same time reduce the "front jamming" accident caused by insufficient friction. When grooving is required due to changes in working conditions, the knurling wheel 21 can be replaced with a grooving cutter head; When the electromagnet 23 is energized, it strongly adsorbs the magnetic block 24, forming a tight connection between the cladding plate 19 and the second fixing plate 17, thereby greatly improving the support stability of the knurling wheel 21. In the past, if the knurling wheel 21 was not firmly clamped, it was very easy to appear shaking during the high-speed rotating knurling process. Once the knurling wheel 21 shakes, it will cause uneven contact between it and the surface of the rolling roll 6, resulting in serious quality problems such as uneven depth and spacing of the processed patterns, greatly reducing the product quality and qualification rate. However, through the adsorption effect of the electromagnet 23 on the magnetic block 24, it can ensure that the knurling wheel 21 always maintains a stable state during the entire knurling process, achieving uniform and stable contact with the surface of the rolling roll 6, ensuring that the depth and spacing of the knurling patterns are uniform and consistent, the pattern clarity is high, and it also improves the accuracy and efficiency of the knurling process; When the operator rotates the adjusting wheel 26, the movable column 25 rotatably connected to the top of the adjusting wheel 26 converts the rotational motion of the adjusting wheel 26 into the linear motion of the movable column 25, and then drives the movable column 25 to move up and down. Driven by the movable column 25, the push block 27 can apply a thrust to the inclined block 29 inside the clamping seat 20. Due to the special shape design of the inclined block 29, its sliding in the clamping seat 20 will generate a horizontal component force, which pushes the insertion rod 30 to move outwards, making the connection between the insertion rod 30 and the insertion block 22 tighter, thereby realizing the firm clamping of the knurling wheel 21. When the push block 27 pushes the inclined block 29 to move outwards to achieve clamping, the second spring 28 will be compressed and store elastic potential energy. When it is necessary to release the clamping, relying on the elastic potential energy stored by itself, the inclined block 29 quickly resets, and the reset of the inclined block 29 drives the insertion rod 30 to move inwards, thus easily releasing the clamping of the knurling wheel 21. The whole operation process is simple, convenient and efficient, and thus it is convenient to replace the knurling wheel 21 and the grooving cutter.

[0020] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. An automatic knurling device for a seamless steel pipe perforating machine, comprising a drum box (1), wherein a push rod (2) is arranged in the drum box (1), and a push head (3) is fixedly connected to one end of the push rod (2), and a transmission shaft (4) is symmetrically inserted and rotatably connected in the drum box (1), and the transmission shaft (4) is symmetrically installed in the drum box (1) through a bearing (5), and a roller (6) is fixedly connected to the transmission shaft (4), characterized in that: A driving cylinder (7) is symmetrically fixedly installed in the rotary drum box (1), a slide plate (8) is symmetrically fixedly connected in the rotary drum box (1), a connecting rod (9) is fixedly connected to the output end of the driving cylinder (7), a sliding seat (10) is slidably installed on the slide plate (8), and the sliding seat (10) and the connecting rod (9) are fixedly connected, a connecting assembly (11) is arranged on the sliding seat (10), and a knurled wheel (21) is arranged on the connecting assembly (11); The connecting assembly (11) is used to adjust the feed rate of the knurling wheel (21).

2. The automatic knurling device for a seamless steel pipe punching machine according to claim 1, characterized in that: The connecting assembly (11) comprises a connecting seat (12) fixedly connected to a sliding seat (10), a mounting hole (14) being provided on the connecting seat (12), an electric push rod (13) being fixedly mounted in the mounting hole (14), a covering plate (19) being fixedly connected to an output end of the electric push rod (13), a clamping seat (20) being fixedly connected to the bottom of the covering plate (19), plug blocks (22) being symmetrically arranged on the clamping seat (20), and the plug blocks (22) are all fixedly connected to the knurled wheel (21).

3. The automatic knurling device for a seamless steel pipe punching machine according to claim 2, characterized in that: A first fixing plate (15) is symmetrically fixedly connected to the connection seat (12), a guide rod (16) is symmetrically fixedly connected to the first fixing plate (15), and the guide rod (16) is inserted into a covering plate (19) and slidably connected, the ends of the guide rods (16) are commonly fixedly connected to a second fixing plate (17), a first spring (18) is sleeved on the guide rods (16), an electromagnet (23) is fixedly mounted on the top of the second fixing plate (17), and a magnetic block (24) is fixedly connected inside the covering plate (19), and the magnetic block (24) is inserted into the electromagnet (23).

4. The automatic knurling device for a seamless steel pipe punching machine according to claim 2, characterized in that: A threaded column (31) is fixedly connected to the base (20), an adjusting wheel (26) is threadedly connected to the threaded column (31), a movable column (25) is rotatably connected to the top of the adjusting wheel (26), a push block (27) is fixedly connected to the top of the movable column (25), an inclined block (29) is symmetrically slidably connected inside the base (20), an insertion rod (30) is fixedly connected to one side of the inclined block (29), and the insertion rod (30) is inserted outside the base (20) and slidably connected.

5. The automatic knurling device for a seamless steel pipe punching machine according to claim 4, characterized in that: A second spring (28) is symmetrically fixedly connected between the inclined blocks (29).

6. The automatic knurling device for a seamless steel pipe punching machine according to claim 4, characterized in that: The regulating wheel (26) is provided with uniformly distributed friction increasing openings.

7. The automatic knurling device for a seamless steel pipe punching machine according to claim 4, characterized in that: The insertion rod (30) and the insertion block (22) are inserted and slidably connected.

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