Punching machine pusher device

Abstract

The application discloses a perforating machine pushing device. The perforating machine pushing device comprises a pushing head, a rotating assembly, an end cover, a pull hook assembly, a hydraulic cylinder, a guide frame and a scraper assembly. The pushing head is arranged at the front end of the rotating assembly. The rotating assembly is rotatably arranged in the guide frame. The end cover is arranged at the front and rear ends of the guide frame. The pull hook assembly is arranged on the end cover. The hydraulic cylinder drives the guide frame through the pull hook assembly. The scraper assembly is arranged outside the guide frame. The perforating machine pushing device has simple and compact overall structure, effectively prolongs the service life, reduces the use and maintenance cost of the factory, reduces the operation strength of workers, and improves the perforating quality and efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of seamless steel pipe piercing machine, and particularly relates to a piercing machine pusher device. Background Technology

[0002] The piercing mill is a crucial piece of equipment in the seamless steel pipe production process for controlling the deformation of the billet. Its function is to roll solid billets into the required hollow tubes. The feeding device is the key equipment for ensuring the smooth feeding and stable rolling of the billet. Therefore, the stability and reliability of the feeding device of the piercing mill directly affect the piercing accuracy and production efficiency.

[0003] In existing technologies, such as Figure 1 As shown, during the blank biting process of the piercing mill, the blank drives the push head 100 and push rod 200 to rotate. Since the outer diameter of the push head 100 is consistent with that of the blank and tangent to the Y-shaped support groove, it rotates relative to the Y-shaped support groove during piercing, which accelerates the wear of the push head 100 and makes it more frequently replaced. The push rod 200 is stuck in the U-shaped groove of the guide frame 300. Since the gap between the journal of the push rod 200 and the U-shaped groove of the guide frame 300 is large, when the wear of the push head 100 is heavy, the center line of the push head 100 and the push rod 200 does not coincide with the center line of the guide rod 400 and the guide frame 300, and there is a certain tilt angle. The degree of swing of the push rod 200 during rotation is aggravated, which intensifies the wear at its shaft diameter and often causes breakage during use. The guide rod 400 below the hydraulic cylinder is generally 5-6m long. It is difficult to guarantee the machining accuracy and coaxiality. Moreover, the guide rod moves linearly thousands of times a day during production. Therefore, the copper bushing 500 also wears out quickly and needs to be replaced frequently. All of the above not only seriously affects the production efficiency of the drilling machine, but also consumes spare parts quickly and has high production costs. Summary of the Invention

[0004] To at least partially solve the technical problems existing in the prior art, the present invention provides a punching machine feeding device.

[0005] The punching machine pusher of the present invention includes a pusher head, a rotary assembly, an end cap, a hook assembly, a hydraulic cylinder, a guide frame, and a scraper assembly. The pusher head is disposed at the front end of the rotary assembly, the rotary assembly is rotatably disposed within the guide frame, the end cap is disposed at both the front and rear ends of the guide frame, the hook assembly is disposed on the end cap, the hydraulic cylinder drives the guide frame through the hook assembly, and the scraper assembly is disposed on the outside of the guide frame, wherein: The rotary assembly includes a rotary shaft, a double-row tapered roller bearing, a spacer ring, a thrust tapered roller bearing, a tapered roller bearing, and a lock nut. The double-row tapered roller bearing is located at the front end of the rotary shaft, the thrust tapered roller bearing is located in the middle of the rotary shaft, the spacer ring is located between the double-row tapered roller bearing and the thrust tapered roller bearing, and the tapered roller bearing is located at the end of the rotary shaft and fixed by the lock nut. The hook assembly includes a fork head, a hinge pin, a hook, and a pad. The hook is mounted on the fork head via the hinge pin, and the pad is mounted on the front end of the hook.

[0006] Furthermore, in the above-mentioned punching machine pushing device, the guide frame has a hollow structure inside, and a limiting platform is provided inside the guide frame; A locking platform is provided in the middle of the rotary shaft, and a positioning platform is provided on the side of the guide frame near the limiting platform. The distance between the locking platform and the positioning platform matches the width of the thrust tapered roller bearing. One side of the thrust tapered roller bearing is sleeved with the locking platform, and the other side of the thrust tapered roller bearing is fitted with the positioning platform and abuts against the limiting platform. The inner ring of the double-row tapered roller bearing is sleeved with the rotating shaft, the outer ring of the double-row tapered roller bearing is fitted inside the guide frame, the spacer ring is matched with the rotating shaft, one end of the spacer ring abuts against the inner ring of the double-row tapered roller bearing, and the other end of the spacer ring abuts against the thrust tapered roller bearing. The rotary shaft passes through the guide frame, the inner ring of the tapered roller bearing is sleeved with the rotary shaft, the outer ring of the tapered roller bearing is embedded inside the guide frame and abuts against the limiting platform, and the locking nut is threadedly engaged with the end of the rotary shaft.

[0007] Furthermore, in the above-mentioned punching machine pushing device, the end cover includes a front end cover and a rear end cover. The front end cover has a hollow structure in the middle. The rotating shaft passes through the front end cover. The front end cover is sleeved on the rotating shaft and fitted with the front end of the guide frame. The rear end cover is fitted with the end of the guide frame. A hook is provided on one side of the rear end cover. The rear end cover and the hook are arranged in an L-shape.

[0008] Furthermore, in the above-mentioned punching machine pushing device, the bottom of the hook matches the hook head, the hook and the hook head are hooked together, and the top of the hook is connected to the top of the rear end cover by a pin.

[0009] Furthermore, in the above-mentioned punching machine pushing device, one end of the fork head is fixedly connected to the output end of the hydraulic cylinder, the hinge shaft passes through the hook and the fork head in sequence, and the hook and the fork head are connected by the hinge shaft.

[0010] Furthermore, in the above-mentioned punching machine pushing device, a mounting groove is provided on one side of the rear end cover, one side of the pad is matched with the mounting groove, the pad is fixed on the mounting groove by bolts, the hook is arc-shaped on the side near the pad, the other side of the pad is matched with the hook, and the hook abuts against the pad.

[0011] Furthermore, in the above-mentioned piercing machine pushing device, the scraper assembly includes a front scraper and a rear scraper. The front scraper is sleeved on the front end of the guide frame and fixed by a positioning pin, and the rear scraper is sleeved on the rear end of the guide frame and fixed by a positioning pin.

[0012] Furthermore, in the above-mentioned piercing machine pushing device, the diameter of the front scraper and the diameter of the rear scraper are both larger than the diameter of the pusher head and 2mm smaller than the outer diameter of the tube blank.

[0013] Furthermore, in the above-mentioned punching machine pushing device, a guide plate is welded between the front scraper and the rear scraper on the outer side of the guide frame, and a sliding plate is fixed to the bottom of the guide plate by bolts.

[0014] Furthermore, in the above-mentioned punching machine pushing device, the pusher head engages with the rotary shaft via a thread, and the pusher head and the rotary shaft are secured with screws.

[0015] The punching machine feeding device of the present invention has the following advantages and beneficial effects: (1) The pusher does not come into contact with the Y-shaped support groove when it is fed, rotated and retracted, which effectively reduces the wear of the Y-shaped support groove and the pusher, while improving the life of the pusher, reducing the consumption of spare parts, and also improving the impact of the wear of the Y-shaped support groove on the surface quality of the tube blank.

[0016] (2) When the tube blank is bitten in, the pusher has a rotary support, the axis of rotation is stable, and the rotation center is consistent with the center line of the hydraulic cylinder, which makes the force more uniform. At the same time, the front and rear scrapers installed on the guide frame also increase the rigidity of the equipment, making the rotary motion more stable, reducing the impact of the original structure pusher rod rotation on the tube blank biting, improving the piercing biting conditions, and improving the piercing quality.

[0017] (3) The overall structure is simple and compact, which avoids the impact of frequent damage to parts, reduces the labor intensity of workers, reduces the cost of factory use, and also improves the efficiency of perforation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the structure of a punching machine pusher device in the prior art; Figure 2 This is a schematic diagram of the structure of the punching machine feeding device of the present invention; Figure 3 for Figure 2 The cross-sectional view of AA shows the scraper assembly structure of the piercing mill pusher device; Figure 4 This is a cross-sectional view of the punching machine feeding device of the present invention, showing the internal structure of the guide frame; Figure 5 This is a cross-sectional view of the guide frame of the punching machine feeding device of the present invention, showing the installation structure of the rotary assembly.

[0019] Explanation of reference numerals in the attached figures: 100: Push head; 200: Push rod; 300: Guide frame; 400: Guide rod; 500: Copper sleeve; 1: Push head; 2: Rotary assembly; 21: Rotary shaft; 22: Clamping table; 23: Double row tapered roller bearing; 24: Spacer ring; 25: Thrust tapered roller bearing; 26: Tapered roller bearing; 27: Locking nut; 3: End cap; 31: Front end cap; 32: Rear end cap; 33: Hook; 34: Mounting slot; 4: Hook assembly; 41: Fork head; 42: Hinge pin; 43: Hook; 44: Pad plate; 5: Hydraulic cylinder; 6: Guide frame; 61: Limiting platform; 62: Positioning platform; 63: Guide plate; 64: Slide plate; 7: Scraper assembly; 71: Front scraper; 72: Rear scraper; 80: Y-shaped bracket. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] like Figures 2 to 5 As shown, the piercing machine pusher of the present invention includes a pusher head 1, a rotary assembly 2, an end cap 3, a hook assembly 4, a hydraulic cylinder 5, a guide frame 6, and a scraper assembly 7. The pusher head 1 is disposed at the front end of the rotary assembly 2, the rotary assembly 2 is rotatably disposed inside the guide frame 6, the end cap 3 is disposed at both the front and rear ends of the guide frame 6, the hook assembly 4 is disposed on the end cap 3, the hydraulic cylinder 5 drives the guide frame 6 through the hook assembly 4, and the scraper assembly 7 is disposed on the outside of the guide frame 6, wherein: The rotary assembly 2 includes a rotary shaft 21, a double-row tapered roller bearing 23, a spacer ring 24, a thrust tapered roller bearing 25, a tapered roller bearing 26, and a lock nut 27. The double-row tapered roller bearing 23 is located at the front end of the rotary shaft 21, the thrust tapered roller bearing 25 is located in the middle of the rotary shaft 21, the spacer ring 24 is located between the double-row tapered roller bearing 23 and the thrust tapered roller bearing 25, and the tapered roller bearing 26 is located at the end of the rotary shaft 21 and is fixed by the lock nut 27. The hook assembly 4 includes a fork head 41, a hinge pin 42, a hook 43, and a pad 44. The hook 43 is mounted on the fork head 41 via the hinge pin 42, and the pad 44 is mounted on the front end of the hook 43.

[0022] Furthermore, in the punching machine feeding device of the present invention, the guide frame 6 has a hollow structure inside, and a limiting platform 61 is provided inside the guide frame 6; A locking platform 22 is provided in the middle of the rotating shaft 21, and a positioning platform 62 is provided on the side of the guide frame 6 near the limiting platform 61. The distance between the locking platform 22 and the positioning platform 62 matches the width of the thrust tapered roller bearing 25. One side of the thrust tapered roller bearing 25 is sleeved with the locking platform 22, and the other side of the thrust tapered roller bearing 25 is fitted with the positioning platform 62 and abuts against the limiting platform 61. The inner ring of the double-row tapered roller bearing 23 is sleeved with the rotating shaft 21, the outer ring of the double-row tapered roller bearing 23 is fitted inside the guide frame 6, the spacer ring 24 is matched with the rotating shaft 21, one end of the spacer ring 24 abuts against the inner ring of the double-row tapered roller bearing 23, and the other end of the spacer ring 24 abuts against the thrust tapered roller bearing. The rotary shaft 21 passes through the guide frame 6, the inner ring of the tapered roller bearing 26 is sleeved with the rotary shaft 21, the outer ring of the tapered roller bearing 26 is embedded in the guide frame 6 and abuts against the limiting table 61, and the locking nut 27 is threadedly engaged with the end of the rotary shaft 21. The double-row tapered roller bearings 23 and 26 are installed on the rotary shaft 21 to improve the stability of the rotary shaft 21 during rotation, preventing it from swinging randomly. At the same time, the thrust tapered roller bearings 25 are installed to transmit the axial force generated when the tube blank swings and impacts to the guide frame 6, thereby ensuring the stable operation of the rotary shaft 21.

[0023] Furthermore, in the punching machine feeding device of the present invention, the end cover 3 includes a front cover 31 and a rear cover 32. The front cover 31 has a hollow structure in the middle. The rotating shaft 21 passes through the front cover 31. The front cover 31 is sleeved on the rotating shaft 21 and fitted with the front end of the guide frame 6. The rear cover 32 is fitted with the end of the guide frame 6. A hook 33 is provided on one side of the rear cover 32. The rear cover 32 and the hook 33 are arranged in an L-shape.

[0024] Furthermore, in the punching machine feeding device of the present invention, the bottom of the hook 43 is matched with the hook head 33, the hook 43 and the hook head 33 are hooked together, and the top of the hook 43 is connected to the top of the rear end cover 32 by a pin, thereby effectively ensuring that the hydraulic cylinder 5 can pull the guide frame 6 back to the initial position during the retraction process, and at the same time effectively preventing the hook 43 from coming off due to factors such as vibration or off-center load during reprocessing.

[0025] Furthermore, in the punching machine pushing device of the present invention, one end of the fork head 41 is fixedly connected to the output end of the hydraulic cylinder 5, and the hinge shaft 42 passes through the hook 43 and the fork head 41 in sequence. The hook 43 and the fork head 41 are connected by the hinge shaft 42, and baffles are symmetrically fixed on both sides of the hook 43 by bolts. The baffles abut against the hinge shaft 42 to prevent the hinge shaft 42 from coming off during use, effectively ensuring the connection between the hook 43 and the hydraulic cylinder 5.

[0026] Furthermore, in the punching machine feeding device of the present invention, a mounting groove 34 is provided on one side of the rear end cover 32, and one side of the pad 44 matches the mounting groove 34. The pad 44 is fixed to the mounting groove 34 by bolts. The side of the hook 43 near the pad 44 is arc-shaped, and the other side of the pad 44 matches the hook 43. The hook 43 abuts against the pad 44, thereby transmitting the axial force received by the guide frame 6 to the pad 44 through the rear end cover 32. The axial force is uniformly transmitted to the hydraulic cylinder 5 through the arc surface cooperation between the pad 44 and the hook 43.

[0027] Furthermore, in the piercing machine feeding device of the present invention, the scraper assembly 7 includes a front scraper 71 and a rear scraper 72. The front scraper 71 is sleeved on the front end of the guide frame 6 and fixed by a positioning pin, and the rear scraper 72 is sleeved on the rear end of the guide frame 6 and fixed by a positioning pin, thereby effectively scraping away the iron oxide scale in the Y-shaped groove 80.

[0028] Furthermore, in the piercing machine pushing device of the present invention, the diameters of the front scraper 71 and the rear scraper 72 are both larger than the diameter of the pusher head 1 and 2mm smaller than the outer diameter of the tube blank, thereby effectively preventing the pusher head 1 from contacting the Y-shaped support groove 80, effectively avoiding wear on the Y-shaped support groove 80 and the pusher head 1, and improving the service life of the pusher head 1.

[0029] Furthermore, in the punching machine feeding device of the present invention, a guide plate 63 is welded between the front scraper 71 and the rear scraper 72 on the outer side of the guide frame 6, and a sliding plate 64 is fixed to the bottom of the guide plate 63 by bolts, thereby effectively improving the wear resistance of the guide plate 63 and reducing the consumption of spare parts.

[0030] Furthermore, in the punching machine feeding device of the present invention, the pusher 1 is engaged with the rotary shaft 21 by a thread, and the pusher 1 and the rotary shaft 21 are prevented from loosening by screws, thereby facilitating the replacement of the pusher 1 and improving work efficiency.

[0031] Specifically, during operation, the output end of the hydraulic cylinder 5 extends, and through the hook assembly 4, pushes the guide frame 6 and the pusher 1 mounted on the top of the rotary shaft 21, causing the billet to approach the piercing machine within the Y-shaped groove 80. When the billet bites in, it drives the pusher 1 to rotate and transmits the rotation to the rotary shaft 21. The rotary shaft 21 ensures the stability of its rotation axis and prevents irregular swinging through double-row tapered roller bearings 23 and 26. When the billet swings, the rotation is controlled by the rollers on the rotary shaft 21. The thrust tapered roller bearing 25 bears the load, and the axial force is evenly transmitted to the hydraulic cylinder 5 through the mating arc surface of the guide frame 6, the rear end cover 32, the pad 44 and the hook 43. At this time, the hydraulic cylinder 5 retracts, and the hook 43 connected to the fork head 41 through the hinge shaft 42 hooks the hook head 33 on the rear end cover 32, pulling the guide frame 6 and the rotating assembly 2 back to the initial position. At the same time, the front scraper 71 and the rear scraper 72 scrape off the oxide scale in the Y-shaped groove 80, thereby completing the material pushing.

[0032] In summary, compared with the prior art, the punching machine feeding device of the present invention has the following advantages and beneficial effects: (1) The pusher does not come into contact with the Y-shaped support groove when it is fed, rotated and retracted, which effectively reduces the wear of the Y-shaped support groove and the pusher, while improving the life of the pusher, reducing the consumption of spare parts, and also improving the impact of the wear of the Y-shaped support groove on the surface quality of the tube blank.

[0033] (2) When the tube blank is bitten in, the pusher has a rotary support, the axis of rotation is stable, and the rotation center is consistent with the center line of the hydraulic cylinder, which makes the force more uniform. At the same time, the front and rear scrapers installed on the guide frame also increase the rigidity of the equipment, making the rotary motion more stable, reducing the impact of the original structure pusher rod rotation on the tube blank biting, improving the piercing biting conditions, and improving the piercing quality.

[0034] (3) The overall structure is simple and compact, which avoids the impact of frequent damage to parts, reduces the labor intensity of workers, reduces the cost of factory use, and also improves the efficiency of perforation.

[0035] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A material pushing device for a perforating machine, characterized in that, The piercing machine pusher includes a pusher head, a rotary assembly, an end cap, a hook assembly, a hydraulic cylinder, a guide frame, and a scraper assembly. The pusher head is located at the front end of the rotary assembly, which is rotatably mounted inside the guide frame. The end cap is located at both the front and rear ends of the guide frame. The hook assembly is mounted on the end cap. The hydraulic cylinder drives the guide frame through the hook assembly. The scraper assembly is located on the outside of the guide frame. The rotary assembly includes a rotary shaft, a double-row tapered roller bearing, a spacer ring, a thrust tapered roller bearing, a tapered roller bearing, and a lock nut. The double-row tapered roller bearing is located at the front end of the rotary shaft, the thrust tapered roller bearing is located in the middle of the rotary shaft, the spacer ring is located between the double-row tapered roller bearing and the thrust tapered roller bearing, and the tapered roller bearing is located at the end of the rotary shaft and fixed by the lock nut. The hook assembly includes a fork head, a hinge pin, a hook, and a pad. The hook is mounted on the fork head via the hinge pin, and the pad is mounted on the front end of the hook.

2. The punching machine feeding device according to claim 1, characterized in that, The guide frame has a hollow structure inside, and a limiting platform is provided inside the guide frame; A locking platform is provided in the middle of the rotary shaft, and a positioning platform is provided on the side of the guide frame near the limiting platform. The distance between the locking platform and the positioning platform matches the width of the thrust tapered roller bearing. One side of the thrust tapered roller bearing is sleeved with the locking platform, and the other side of the thrust tapered roller bearing is fitted with the positioning platform and abuts against the limiting platform. The inner ring of the double-row tapered roller bearing is sleeved with the rotating shaft, the outer ring of the double-row tapered roller bearing is fitted inside the guide frame, the spacer ring is matched with the rotating shaft, one end of the spacer ring abuts against the inner ring of the double-row tapered roller bearing, and the other end of the spacer ring abuts against the thrust tapered roller bearing. The rotary shaft passes through the guide frame, the inner ring of the tapered roller bearing is sleeved with the rotary shaft, the outer ring of the tapered roller bearing is embedded inside the guide frame and abuts against the limiting platform, and the locking nut is threadedly engaged with the end of the rotary shaft.

3. The punching machine feeding device according to claim 1, characterized in that, The end cap includes a front end cap and a rear end cap. The front end cap has a hollow structure in the middle. The rotating shaft passes through the front end cap. The front end cap is sleeved on the rotating shaft and fitted with the front end of the guide frame. The rear end cap is fitted with the end of the guide frame. A hook is provided on one side of the rear end cap. The rear end cap and the hook are arranged in an L-shape.

4. The punching machine feeding device according to claim 3, characterized in that, The bottom of the hook matches the hook head, the hook and the hook head are hooked together, and the top of the hook is connected to the top of the rear end cover by a pin.

5. The punching machine feeding device according to claim 1, characterized in that, One end of the fork head is fixedly connected to the output end of the hydraulic cylinder, and the hinge shaft passes through the hook and the fork head in sequence, with the hook and the fork head connected by the hinge shaft.

6. The punching machine feeding device according to claim 3, characterized in that, The rear end cover has a mounting groove on one side, and the pad is matched with the mounting groove on one side. The pad is fixed to the mounting groove by bolts. The hook is arc-shaped on the side near the pad, and the other side of the pad is matched with the hook. The hook abuts against the pad.

7. The punching machine feeding device according to claim 1, characterized in that, The scraper assembly includes a front scraper and a rear scraper. The front scraper is sleeved on the front end of the guide frame and fixed by a positioning pin, and the rear scraper is sleeved on the rear end of the guide frame and fixed by a positioning pin.

8. The punching machine feeding device according to claim 7, characterized in that, The diameters of the front scraper and the rear scraper are both larger than the diameter of the pusher and 2 mm smaller than the outer diameter of the tube blank.

9. The punching machine feeding device according to claim 7, characterized in that, A guide plate is welded between the front scraper and the rear scraper on the outside of the guide frame, and a sliding plate is fixed to the bottom of the guide plate by bolts.

10. The punching machine feeding device according to claim 1, characterized in that, The pusher head engages with the rotary shaft via a thread, and the pusher head and the rotary shaft are secured with screws to prevent loosening.

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