Connecting device for movable tool apron and shearing oil cylinder of hydraulic shearing machine and shearing machine

Abstract

The utility model provides a connecting device for a movable tool apron and a shearing oil cylinder of a hydraulic shearing machine and the shearing machine, and belongs to the technical field of steelmaking continuous casting equipment. The top end of the connector is sleeved with a first thrust knuckle bearing, and the upper portion of the first thrust knuckle bearing is arranged in a counter bore of the movable tool apron; a first fixed connecting part is arranged at the bottom end of the connector and is connected to a piston rod of the shearing hydraulic cylinder; a step through hole is formed in the connector; the pull rod penetrates through the stepped through hole, the top end of the pull rod penetrates through the interior of the movable tool apron, and a second fixed connecting part is arranged on the pull rod and connected to the bottom of the movable tool apron; the lower portion of the pull rod is sequentially sleeved with a second thrust knuckle bearing, a pressing check ring and a fastening mechanism. By utilizing the utility model, the problem that the service life of the shearing hydraulic cylinder is influenced by the radial force on the piston rod of the hydraulic cylinder due to the shearing motion of the movable tool apron when the slideway is abraded or the assembly precision is not enough in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steelmaking continuous casting equipment technical field more specifically, relate to a kind of hydraulic shearing machine movable tool holder and the connecting device of shearing oil cylinder and shearing machine. BACKGROUND

[0002] Continuous casting billet hydraulic shearing machine is important equipment in continuous casting production, and is a kind of continuous casting machine billet sizing cutting equipment, and the use of continuous casting billet hydraulic shearing machine directly affects the normal production of continuous casting machine. Continuous casting billet hydraulic shearing machine is the main equipment of continuous casting machine continuous work, and it is in a harsh working environment because it directly contacts with high-temperature billet. High temperature makes continuous casting billet hydraulic shearing machine hydraulic cylinder, blade, limit easy to damage, and rack is easy to deform.

[0003] At present, the movable tool holder of continuous casting billet hydraulic shearing machine is connected with the piston rod end of shearing hydraulic cylinder as rigid connection, and the movable tool holder moves along the guide slide, and the guide slide surface is required to be parallel to the guide axis of the piston rod of shearing hydraulic cylinder. When the slide wears or the assembly precision is not enough, the movable tool holder is horizontally offset during shearing, the piston rod is subjected to radial force, the front end seal of shearing hydraulic cylinder and the guide ring are unevenly worn, and when the wear reaches a certain degree, the front end seal of the piston rod will fail, and oil leakage occurs at the joint of the rod end seal ring. After shearing hydraulic cylinder leaks, the problem can only be solved by replacing shearing hydraulic cylinder. Under normal production rhythm, the average service life of shearing hydraulic cylinder is only about 6 months, and the service life is generally short. Greatly increase the operation and maintenance cost of equipment. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model aims at providing a kind of connecting device of hydraulic shearing machine movable tool holder and shearing oil cylinder and shearing machine to solve the problems in the prior art, such as the rigid connection of the movable tool holder of continuous casting billet hydraulic shearing machine and the piston rod of shearing hydraulic cylinder, when the slide wears or the assembly precision is not enough, it is easy to cause the front end seal of shearing hydraulic cylinder and the guide ring to appear uneven wear, affect the service life of shearing hydraulic cylinder, increase operation and maintenance cost.

[0005] The utility model provides a kind of connecting device of hydraulic shearing machine movable tool holder and shearing oil cylinder, including connecting head and pull rod, wherein,

[0006] A first thrust joint bearing is sleeved on the top end of the connecting head, the upper outer periphery of the first thrust joint bearing is arranged in the counterbore formed in the bottom surface of the movable tool holder, a pressing fixing member is arranged on the lower outer periphery of the first thrust joint bearing, and the pressing fixing member is used to press and fix the first thrust joint bearing in the counterbore.

[0007] The pull rod is sleeved in the stepped through hole, the top end of the pull rod is sleeved in the inside of the movable tool holder, a second fixed connecting part is arranged on the part of the pull rod outside the top of the stepped through hole, the second fixed connecting part is fixedly connected to the bottom of the movable tool holder through a second detachable mechanism, a second shaft neck is arranged on the lower part of the pull rod, and a second thrust joint bearing, a pressing ring and a fastening mechanism are sequentially sleeved on the outer periphery of the second shaft neck from top to bottom.

[0008] In addition, preferably, a first shaft neck is arranged on the top end of the connecting head, and the first shaft neck is sleeved in the inner hole of the first thrust joint bearing.

[0009] In addition, preferably, the pressing fixing member comprises a first semicircular pressing ring and a second semicircular pressing ring arranged opposite to the opening of the first semicircular pressing ring.

[0010] In addition, preferably, the first fixed connecting part is a first connecting flange, and the first detachable mechanism is a first bolt.

[0011] In addition, preferably, the first connecting flange is integrally machined with the connecting head or is welded and fixed on the bottom end of the connecting head.

[0012] In addition, preferably, the second fixed connecting part is a second connecting flange, and the second detachable mechanism is a second bolt.

[0013] In addition, preferably, the second connecting flange is integrally machined with the pull rod or is welded and fixed on the pull rod.

[0014] In addition, preferably, a gap is arranged between the top surface of the pressing ring and the bottom end surface of the second thrust joint bearing.

[0015] In addition, preferably, the fastening mechanism comprises a thread arranged on the pull rod and a locking nut matched with the thread.

[0016] The utility model provides a hydraulic shearing machine for continuous casting billet, including movable knife rest and shearing oil cylinder, be provided with shearing hydraulic cylinder piston rod on the shearing oil cylinder, through the connecting device as above between movable knife rest and shearing hydraulic cylinder piston rod connection.

[0017] From the above technical scheme can know, the utility model provides the connecting device and shearing machine of movable knife rest and shearing oil cylinder of hydraulic shearing machine, through the structural design of connecting head and pull rod, utilize the universal swing and self-centering function of first thrust joint bearing and second thrust joint bearing, through the control of the compression gap between compression washer and second thrust joint bearing end face, can ensure that first thrust joint bearing and second thrust joint bearing have certain radial activity, make movable knife rest can realize 360 degrees small angle radial swing, the radial deviation that movable knife rest moves along guide slide way and occurs because of slide way size error or movable gap is too big can be swung by first thrust joint bearing and second thrust joint bearing and absorbs, effectively avoided movable knife rest movement and the radial force that the swing brought about directly acts on shearing hydraulic cylinder piston rod, play the role of protection shearing hydraulic cylinder piston rod's guide sealing washer and sealing guide ring, can greatly prolong the service life of shearing hydraulic cylinder, thereby reach the effect of reducing cost and increasing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other objects and results of the utility model will be more apparent and easy to understand by referring to the following description of the drawings and with the more comprehensive understanding of the utility model.

[0019] Figure 1 It is the main view cross section structure schematic drawing of the connecting device of movable knife rest and shearing oil cylinder of hydraulic shearing machine according to the utility model embodiment;

[0020] Figure 2 It is the three-dimensional cross section structure schematic drawing of the connecting device of movable knife rest and shearing oil cylinder of hydraulic shearing machine according to the utility model embodiment;

[0021] Figure 3 It is the external structure schematic drawing of the connecting device of movable knife rest and shearing oil cylinder of hydraulic shearing machine according to the utility model embodiment.

[0022] In the drawings, 1-connecting head, 11-first thrust joint bearing, 12-compression fixing piece, 13-first fixed connecting part, 14-first detachable mechanism, 15-step through hole, 16-first journal, 2-pull rod, 21-second fixed connecting part, 22-second detachable mechanism, 23-second journal, 24-second thrust joint bearing, 25-compression retainer, 26-fastening mechanism, 3-movable knife rest, 4-shearing hydraulic cylinder, 41-shearing hydraulic cylinder piston rod, 42-hydraulic shearing machine frame.

[0023] Like numerals refer to similar or corresponding features or functions throughout the figures. DETAILED DESCRIPTION

[0024] In view of the foregoing, in the prior art, the movable knife seat of the hydraulic continuous casting billet shearing machine is rigidly connected with the piston rod of the shearing hydraulic cylinder, when the slide wears or the assembly precision is not enough, uneven wear of the front end seal and the guide ring of the shearing hydraulic cylinder is easily caused, the service life of the shearing hydraulic cylinder is affected, the operation and maintenance costs are increased and other problems are caused, and a connecting device of a movable knife seat and a shearing cylinder of a hydraulic shearing machine and the shearing machine are provided.

[0025] The specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0026] In order to illustrate the connecting device of a movable knife seat and a shearing cylinder of a hydraulic shearing machine and the shearing machine provided by the utility model, Figure 1 A front view cross-sectional structure of the connecting device of a movable knife seat and a shearing cylinder of a hydraulic shearing machine according to the embodiment of the utility model is shown; Figure 2 A three-dimensional cross-sectional structure of the connecting device of a movable knife seat and a shearing cylinder of a hydraulic shearing machine according to the embodiment of the utility model is shown; Figure 3 An external structure of the connecting device of a movable knife seat and a shearing cylinder of a hydraulic shearing machine according to the embodiment of the utility model is shown.

[0027] As Figures 1 to 3 The connecting device of a movable knife seat and a shearing cylinder of a hydraulic shearing machine provided by the utility model, as shown in the drawings, comprises a connecting head 1 and a pull rod 2, wherein,

[0028] A first thrust joint bearing 11 is sleeved on the top end of the connecting head 1, the upper part of the first thrust joint bearing 11 is arranged in a counterbore formed in the bottom surface of the movable knife seat 3, a pressing fixing piece 12 is arranged on the lower part of the first thrust joint bearing 11, and the pressing fixing piece 12 presses and fixes the first thrust joint bearing 11 in the counterbore; a first fixed connecting part 13 is arranged at the bottom end of the connecting head 1, the first fixed connecting part 13 is fixedly connected on the piston rod 41 of the shearing hydraulic cylinder through a first detachable mechanism 14; a stepped through hole 15 with a narrow upper part and a wide lower part is arranged in the inner center of the connecting head 1;

[0029] The pull rod 2 is arranged in the stepped through hole 15, the top end of the pull rod 2 is arranged in the inside of the movable tool apron 3, the second fixed connecting part 21 is arranged on the part of the pull rod 2 located outside the top of the stepped through hole 15, the second fixed connecting part 21 is fixedly connected to the bottom of the movable tool apron 3 through the second detachable mechanism 22, the second shaft neck 23 is arranged on the lower part of the pull rod 2, the second thrust angular ball bearing 24, the compression retainer ring 25 and the fastening mechanism 26 are sequentially arranged on the outer periphery of the second shaft neck 23 from top to bottom, and the top end of the second thrust angular ball bearing 24 is arranged in the inner top of the lower wide hole of the stepped through hole 15.

[0030] The diameter of the upper narrow hole of the stepped through hole 15 is slightly larger than the diameter of the pull rod 2, and the diameter of the lower wide hole of the stepped through hole 15 is larger, and the upper part in the hole is used for mounting the second thrust angular ball bearing 24.

[0031] Through the structural design of the connecting head 1 and the pull rod 2, the universal swing and self-centering functions of the first thrust angular ball bearing 11 and the second thrust angular ball bearing 24 are utilized, the compression gap between the compression retainer ring 25 and the end face of the second thrust angular ball bearing 24 is controlled, the first thrust angular ball bearing 11 and the second thrust angular ball bearing 24 have a certain radial movement amount, the movable tool apron 3 can realize 360-degree small-angle radial swing, the radial deviation caused by the size error of the guide slide or the excessive movable gap when the movable tool apron 3 moves along the guide slide can be absorbed by the swing of the first thrust angular ball bearing 11 and the second thrust angular ball bearing 24, the radial force caused by the deviation of the movable tool apron 3 is directly applied to the shear hydraulic cylinder piston rod 41, the guide sealing ring and the sealing guide ring of the shear hydraulic cylinder piston rod 41 are protected, the service life of the shear hydraulic cylinder 4 can be greatly prolonged, and the effect of reducing cost and increasing efficiency is achieved.

[0032] As a preferred scheme of the utility model, the first shaft neck 16 is arranged at the top end of the connecting head 1.

[0033] Specifically, the first thrust angular ball bearing 11 is a spherical sliding bearing, the sliding contact surface is an inner spherical surface and an outer spherical surface, and the first shaft neck 16 of the connecting head 1 is arranged in the inner hole of the first thrust angular ball bearing 11, and the bottom end face of the first thrust angular ball bearing 11 is positioned by the shaft shoulder of the lower part of the first shaft neck 16.

[0034] As a preferred scheme of the utility model, the compression fixing part 12 comprises a first semicircular compression ring and a second semicircular compression ring arranged opposite to the opening of the first semicircular compression ring.

[0035] Specifically, the compression fixing part 12 is a compression fixing ring structure, and the two half ring form structures are convenient for disassembly and assembly.

[0036] As a preferred scheme of the utility model, the first fixed connection part 13 is a first connecting flange; and the first detachable mechanism 14 is a first bolt.

[0037] It should be noted that the first fixed connection part 13 is preferably but not limited to a first connecting flange; and the first detachable mechanism 14 is preferably but not limited to a first bolt, which is not particularly limited in the utility model.

[0038] As a preferred scheme of the utility model, the first connecting flange is integrally processed with the connecting head 1 or is welded and fixed at the bottom end of the connecting head 1, so that the connection between the first connecting flange and the connecting head 1 is more firm.

[0039] As a preferred scheme of the utility model, the second fixed connection part 21 is a second connecting flange; and the second detachable mechanism 22 is a second bolt.

[0040] It should be noted that the second fixed connection part 21 is preferably but not limited to a second connecting flange; and the second detachable mechanism 22 is preferably but not limited to a second bolt, which is not particularly limited in the utility model.

[0041] As a preferred scheme of the utility model, the second connecting flange is integrally processed with the pull rod 2 or is welded and fixed on the pull rod 2, so that the connection between the second connecting flange and the pull rod 2 is more firm.

[0042] As a preferred scheme of the utility model, a gap is arranged between the top surface of the pressing stop ring 25 and the bottom end surface of the second thrust joint bearing 24. The first thrust joint bearing 11 and the second thrust joint bearing 24 have a certain radial movement amount, so that the movable tool holder 3 can realize 360-degree small-angle radial swing, and the radial deviation caused by the size error of the guide slide or the excessive activity gap when the movable tool holder 3 moves along the guide slide can be absorbed by the swing of the first thrust joint bearing 11 and the second thrust joint bearing 24.

[0043] As a preferred scheme of the utility model, the fastening mechanism 26 comprises a thread arranged on the pull rod 2 and a locking nut matched with the thread.

[0044] The gap between the top surface of the pressing stop ring 25 and the bottom end surface of the second thrust joint bearing 24 is adjusted by the locking nut.

[0045] The use principle of the utility model is as follows:

[0046] In the prior art, the end of the shearing hydraulic cylinder piston rod 41 is directly and rigidly connected with the bottom of the movable tool holder 3. When the movable tool holder 3 moves along the guide slide, the radial offset force caused by the size error of the slide or the excessive activity gap is applied to the piston rod, thereby greatly reducing the service life of the shearing hydraulic cylinder. In order to solve the problem, the utility model improves the connection scheme between the existing shearing hydraulic cylinder piston rod 41 and the movable tool holder 3, and changes the rigid connection between the movable tool holder 3 and the shearing hydraulic cylinder piston rod 41 into a "flexible connection" with a certain radial activity gap. Figures 1-3 As shown in the figure, the first fixed connection part 13 of the connecting head 1 and the end of the shearing hydraulic cylinder piston rod 41 are fixedly connected together through the first detachable mechanism 14, the other end of the connecting head 1 is inserted into the inner hole of the first thrust joint bearing 11, and the first thrust joint bearing 11 is fixed in the counterbore at the bottom end of the movable tool holder 3 through the compression fixing part.

[0047] The connecting head 1 is a circular shaft workpiece, a stepped through hole 15 is formed in the middle, the second thrust joint bearing 24 is installed at the inner top of the lower wide hole of the stepped through hole 15, and the pull rod 2 passes through the stepped through hole 15 of the connecting head 1. The pull rod 2 is a solid shaft, the second fixed connection part 21 at the upper end is fixedly connected to the movable tool holder 3 through the second detachable mechanism 22, the other end is inserted into the hole of the second thrust joint bearing 24, the height h of the shaft shoulder matched with the inner hole of the second thrust joint bearing 24 is slightly greater than the total height H of the second thrust joint bearing 24, so that H-h=S. That is, after the locking nut is compressed to compress the blocking ring 25, the bottom surface of the blocking ring 25 is compressed to the lower shaft shoulder end surface of the pull rod 2, and the top surface of the blocking ring 25 has a gap S with the end surface of the second thrust joint bearing 24. The first thrust joint bearing 11 mainly bears the normal pressure in the shearing process, so a large load capacity specification is selected according to the load. The compression fixing part 12 is preferably a compression ring structure, which is in the form of two half rings divided into two, which is convenient to disassemble and assemble. The second thrust joint bearing 24 mainly bears the tension force when the shearing hydraulic cylinder piston cylinder returns, and the load is small, so a smaller specification is selected. The movable tool holder 3 is indirectly connected with the shearing hydraulic cylinder piston rod 41 through the first thrust joint bearing 11 and the second thrust joint bearing 24. When the movable tool holder 3 moves along the slide and deviates due to the size error of the slide or the excessive activity gap, it can freely swing around the universal swing pair composed of the first thrust joint bearing 11 and the second thrust joint bearing 24, so that the shearing hydraulic cylinder piston rod 41 is not subjected to the radial force.

[0048] The utility model provides a continuous casting billet hydraulic shearing machine, including movable tool holder 3 and shearing oil cylinder 4, be provided with shearing hydraulic cylinder piston rod 41 on shearing oil cylinder 4, through the connecting device provided by the utility model as described above between movable tool holder 3 and shearing hydraulic cylinder piston rod 41 is connected.

[0049] Specifically, the continuous casting hydraulic shearing machine comprises a hydraulic shearing machine frame 42, a shearing oil cylinder 4 installed at the lower part of the hydraulic shearing machine frame 42, and a movable knife holder 3 installed at the upper part of the hydraulic shearing machine frame 42, and a shearing hydraulic cylinder piston rod 41 is arranged on the shearing oil cylinder 4. In the prior art, the shearing hydraulic cylinder piston rod 41 is rigidly connected with the movable knife holder 3. Therefore, when the movable knife holder 3 moves along the guide slide, the guide slide surface is required to be parallel to the guide axis of the shearing hydraulic cylinder piston rod 41. When the slide is worn or the assembly precision is not enough, the radial force generated by the lateral deviation of the movable knife holder 3 during the shearing process directly acts on the shearing hydraulic cylinder piston rod 41, which easily causes the shearing hydraulic cylinder piston rod 41 to be worn due to uneven force and reduces the service life. In the technical scheme of the utility model, the movable knife holder 3 and the shearing oil cylinder 4 are connected through the connecting device provided by the utility model, and the connection between the movable knife holder 3 and the shearing hydraulic cylinder piston rod 41 is changed from rigid connection to "flexible connection" with a certain radial movement gap, so that the radial force of the movable knife holder 3 generated by the lateral deviation is effectively transmitted to the shearing hydraulic cylinder piston rod 41, thereby protecting the hydraulic cylinder and achieving the technical effect of prolonging the service life of the shearing oil cylinder 4.

[0050] As can be seen from the above specific embodiments, the connecting device of the movable knife holder and the shearing oil cylinder of the hydraulic shearing machine and the shearing machine provided by the utility model have the technical effects that, through the structural design of the connecting head and the pull rod, the universal swing and self-centering functions of the first thrust joint bearing and the second thrust joint bearing are utilized, and by controlling the compression gap between the compression washer and the end surface of the second thrust joint bearing, the first thrust joint bearing and the second thrust joint bearing have a certain radial movement amount, so that the movable knife holder can realize 360-degree small-angle radial swing. The radial deviation caused by the size error of the guide slide or the excessive movement gap of the movable knife holder when the movable knife holder moves along the guide slide can be absorbed by the swing of the first thrust joint bearing and the second thrust joint bearing, so that the radial force caused by the deviation of the movable knife holder is directly applied to the shearing hydraulic cylinder piston rod, the guide sealing ring and the sealing guide ring of the shearing hydraulic cylinder piston rod are protected, the service life of the shearing hydraulic cylinder is greatly prolonged, and the effect of reducing cost and increasing efficiency is achieved.

[0051] The connecting device of the movable knife holder and the shearing oil cylinder of the hydraulic shearing machine and the shearing machine according to the utility model are described above with reference to the drawings in an exemplary manner. However, those skilled in the art should understand that various improvements can be made to the connecting device of the movable knife holder and the shearing oil cylinder of the hydraulic shearing machine and the shearing machine according to the utility model without departing from the content of the utility model. Therefore, the protection scope of the utility model should be determined by the content of the appended claims.

Claims

1. A connecting device of a movable knife seat and a shearing oil cylinder of a hydraulic shearing machine, characterized in that, The connecting head and the pull rod are included, wherein A first thrust joint bearing is sleeved on the top end of the connecting head, the upper outer periphery of the first thrust joint bearing is arranged in the counterbore opened in the bottom surface of the movable knife seat, a pressing fixing member is arranged on the lower outer periphery of the first thrust joint bearing, and the pressing fixing member is used for pressing and fixing the first thrust joint bearing in the counterbore. A first fixed connecting part is arranged on the bottom end of the connecting head, and the first fixed connecting part is fixedly connected to the piston rod of the shearing hydraulic cylinder through a first detachable mechanism. The pull rod is arranged in the stepped through hole, the top end of the pull rod is arranged in the inside of the movable knife seat, a second fixed connecting part is arranged on the part of the pull rod outside the top of the stepped through hole, and the second fixed connecting part is fixedly connected to the bottom of the movable knife seat through a second detachable mechanism. A second shaft neck is arranged on the lower part of the pull rod, a second thrust joint bearing, a pressing ring and a fastening mechanism are sequentially sleeved on the outer periphery of the second shaft neck from top to bottom, the top end of the second thrust joint bearing is arranged in the hole of the lower wide hole of the stepped through hole.

2. The connecting device of the movable knife seat and the shearing oil cylinder of the hydraulic shearing machine according to claim 1, wherein A first shaft neck is arranged on the top end of the connecting head. The first shaft neck is arranged in the inside of the inner hole of the first thrust joint bearing.

3. The connecting device of the movable knife seat and the shearing oil cylinder of the hydraulic shearing machine according to claim 1, wherein The pressing fixing member includes a first semicircular pressing ring and a second semicircular pressing ring arranged opposite to the opening of the first semicircular pressing ring.

4. The connecting device of the movable knife seat and the shearing oil cylinder of the hydraulic shearing machine according to claim 1, wherein The first fixed connecting part is a first connecting flange. The first detachable mechanism is a first bolt.

5. The connecting device of the movable knife seat and the shearing oil cylinder of the hydraulic shearing machine according to claim 4, wherein The first connecting flange is integrally machined with the connecting head or is machined after being welded and fixed on the bottom end of the connecting head.

6. The connecting device of the movable knife seat and the shearing oil cylinder of the hydraulic shearing machine according to claim 1, wherein The second fixed connecting part is a second connecting flange. The second detachable mechanism is a second bolt.

7. The connecting device of the movable knife seat and the shearing oil cylinder of the hydraulic shearing machine according to claim 6, wherein The second connecting flange is integrally machined with the pull rod or is machined after being welded and fixed on the pull rod.

8. The connecting device of the movable knife seat and the shearing oil cylinder of the hydraulic shearing machine according to claim 1, wherein A gap is arranged between the top surface of the pressing ring and the bottom end surface of the second thrust joint bearing.

9. The connecting device of the movable knife seat and the shearing oil cylinder of the hydraulic shearing machine according to claim 1, wherein The fastening mechanism includes a thread arranged on the pull rod and a locking nut matched with the thread.

10. A shearing machine comprising a movable knife seat and a shearing oil cylinder, on which a shearing hydraulic cylinder piston rod is arranged; characterized in that, Between the active tool holder and the shearing hydraulic cylinder piston rod is connected by the connecting device according to any one of claims 1-9.

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