Synchronous centering mechanism for a wheel rolling mill

Abstract

The application discloses a synchronous centering mechanism of a wheel rolling mill and belongs to the technical field of steel wheel rolling mills. The synchronous centering mechanism comprises a main roller assembly which is slidably arranged in a mounting groove of a machine body along a left-right direction and a centering roller assembly which is symmetrically arranged relative to the main roller assembly along an up-down direction, and the two centering roller assemblies are hingedly connected with the machine body. A driving part is arranged on the main roller assembly, and the driving part is used for simultaneously driving the left ends of the two centering roller assemblies to rotate when the main roller assembly moves to the right. When the synchronous centering mechanism is used, a wheel is placed between the right ends of the two centering roller assemblies and the right end of the main roller assembly through a mechanical arm, then the main roller assembly is driven to move to the right through a main hydraulic telescopic rod, the right end of the main roller assembly and the right ends of the two centering roller assemblies are simultaneously moved inward, and the purpose of clamping the tread of the wheel is achieved. Any position of the right end of the main roller assembly and the right ends of the two centering roller assemblies when the right end of the main roller assembly and the right ends of the two centering roller assemblies are simultaneously moved inward is an inscribed circle, and the inscribed circles are concentric, so that the tread of the wheel is effectively clamped.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of steel wheel rolling mill, in particular to a synchronous centering mechanism of wheel rolling mill. BACKGROUND

[0002] At present, the wheel rolling mill is a kind of equipment for manufacturing railway train wheels. When manufacturing the wheel, the blank after heating is first preliminarily pressed into shape by a press, then the spokes are expanded and the flanges and tread are rolled on the wheel rolling mill, and finally the wheel is precisely machined on a lathe.

[0003] The existing steel wheel hot rolling mill generally comprises a main roller, an upper centering roller, a lower centering roller, a side roller, a guide roller and a spoke roller. When in use, the wheel just hot-forged is placed at a set position by a mechanical arm, then the main roller, the upper centering roller and the lower centering roller are closed to clamp the tread of the wheel, then the side roller and the guide roller clamp the side surface of the wheel, the rounded table surface of the spoke roller is in contact with the inner edge surface of the wheel spoke, and then the spoke roller rotates to drive the wheel to rotate by friction. The driving mode of the main roller, the upper centering roller and the lower centering roller of the existing rolling mill is independent driving. Since the wheel is circular, the control system needs to control the independent driving devices of the main roller, the upper centering roller and the lower centering roller to act individually, so as to finally clamp the wheel. It is necessary to ensure that the circumferential surfaces of the main roller, the upper centering roller and the lower centering roller are all tangent to a virtual circle, so as to ensure the effective clamping of the wheel.

[0004] In the above-mentioned scheme, three independent power devices need to be separately provided to drive the main roller, the upper centering roller and the lower centering roller, which increases the energy consumption and the manufacturing cost and operation cost of the equipment. SUMMARY

[0005] The present application aims to provide a synchronous centering mechanism of wheel rolling mill, which has the advantage that one power device simultaneously drives the main roller, the upper centering roller and the lower centering roller to close and open, effectively solving the problems of high manufacturing cost and large energy consumption of the existing hot rolling mill during operation.

[0006] The application adopts the following technical scheme: a synchronous centering mechanism of a wheel rolling mill, comprising a main roller assembly slidingly arranged in a mounting groove of a machine body in a left-right direction and a centering roller assembly symmetrically arranged relative to the main roller assembly in an up-down direction, both of the centering roller assemblies being hinged to the machine body; the main roller assembly is provided with a driving portion, the driving portion being used for driving the left ends of the two centering roller assemblies to rotate when the main roller assembly moves rightward, so as to make the right ends of the two centering roller assemblies and the right end of the main roller assembly move inward synchronously, and the right ends of the two centering roller assemblies and the right end of the main roller assembly are always tangent to the circumferential surface of the corresponding virtual circle at any position in the process, and the inscribed circles of the right ends of the two centering roller assemblies and the right end of the main roller assembly are always concentric; the left end of the main roller assembly is provided with a main hydraulic telescopic rod, the main hydraulic telescopic rod being used for driving the main roller assembly to move leftward and rightward.

[0007] Further, the centering roller assembly comprises a hinged arm and a centering roller rotatably connected to the right end of the hinged arm, and the middle section of the hinged arm is hinged to the machine body.

[0008] Further, the main roller assembly comprises a driving rod and a main roller rotatably connected to the right end of the driving rod, the left end of the driving rod is fixedly arranged at the output end of the main hydraulic telescopic rod, the driving rod is slidingly arranged in the mounting groove of the machine body in the left-right direction, the driving portion comprises a driving block fixedly arranged on the driving rod, the upper part and the lower part of the right side surface of the driving block are both provided with cam curved surfaces, and the hinged arm is provided with a follow-up mechanism, the follow-up mechanism being used for keeping the left end of the hinged arm always in contact with the cam curved surfaces when the driving block moves leftward and rightward.

[0009] Further, the follow-up mechanism comprises two follow-up plates, the left end of each follow-up plate is hinged to the machine body, the middle part of each follow-up plate is provided with an arc-shaped hole in the left-right direction, and the right part of each follow-up plate is provided with an adaptive hole; the front side surface of each driving block is fixedly provided with a main pin column located in the corresponding arc-shaped hole, and the left part of the front side surface of each hinged arm is fixedly provided with a secondary pin column located in the corresponding adaptive hole.

[0010] Further, a first compensation mechanism is arranged between the hinged arm and the centering roller; a second compensation mechanism is arranged between the driving rod and the main roller; the first compensation mechanism is used for driving the centering roller to move inward to be in contact with the tread surface of the wheel when the centering roller is not in contact with the tread surface of the wheel during clamping of the wheel; and the second compensation mechanism is used for driving the main roller to move inward to be in contact with the tread surface of the wheel when the main roller is not in contact with the tread surface of the wheel during clamping of the wheel.

[0011] Further, the first compensation mechanism comprises a housing fixedly arranged at the right end of the articulated arm, the centering roller is rotatably connected to the inside of the mounting block, the upper end surface of the mounting block is fixedly provided with a guide rod, the guide rod is arranged in the housing in the up-down direction, a bottom plate is fixedly arranged on the guide rod in the housing, a first compensation spring is sleeved on the guide rod in the housing, the bottom end of the first compensation spring is fixedly arranged with the bottom plate, and a limiting ring is fixedly arranged in the housing above the bottom plate.

[0012] Further, the main roller is rotatably connected between the two clamping plates, the driving rod is slidably arranged in the two clamping plates in the left-right direction, the second compensation mechanism comprises a sliding block slidably arranged on the upper end surface and the lower end surface of the driving rod in the left-right direction, each sliding block is fixedly arranged with each clamping plate, a second compensation spring is fixedly arranged between the driving block and each sliding block, a limiting block is fixedly arranged on the upper end surface and the lower end surface of the driving rod, a through hole is formed in the limiting block, and the second compensation spring penetrates through the through hole of the limiting block.

[0013] Further, the top end of the first compensation spring is fixedly arranged with an adjusting plate, the adjusting plate is slidably arranged in the housing in the up-down direction, the upper end surface of the adjusting plate is rotatably connected with a threaded column, and the outer surface of the threaded column is threadedly connected with the housing.

[0014] Further, a buffer hole is formed in the driving block in the left-right direction corresponding to the position of the second compensation spring, a push block fixedly arranged with the left end of the second compensation spring is slidably arranged in the buffer hole in the left-right direction, an adjusting bolt is rotatably connected to the left side surface of the push block, a cover plate is threadedly connected to the outer surface of the adjusting bolt, and the cover plate is fixedly arranged with the driving block.

[0015] Further, the front side of the machine body is fixedly provided with an L-shaped frame, and a detection camera is fixedly arranged on the L-shaped frame in the front-rear direction.

[0016] Firstly, the main roller assembly, the centering roller assembly and the driving part are arranged, when the device is used, the wheel is placed between the right end of the two centering roller assemblies and the right end of the main roller assembly through the mechanical arm, then the main roller assembly is driven to move rightwards through the main hydraulic telescopic rod, so that the right end of the main roller assembly and the right end of the two centering roller assemblies move inward synchronously to clamp the tread of the wheel, and any position of the right end of the main roller assembly and the right end of the two centering roller assemblies moving inward synchronously has an inscribed circle, and the inscribed circles are concentric, so that the tread of the wheel is effectively clamped.

[0017] Secondly, the present application sets the centering roller, the guide rod, the bottom plate and the first compensation spring, when the device is used, if the tread of the wheel is regular circle, when the centering roller and the main roller clamp the wheel, the centering roller is extruded to make the mounting block, the guide rod and the bottom plate move upward until the upper end surface of the bottom plate touches the lower end surface of the limiting ring, the circumferential surface of the centering roller and the tread of the wheel form rigid contact; if the tread of the wheel is slightly irregular circle, when the centering roller and the main roller clamp the wheel, if the circumferential surface of the centering roller just contacts the irregular recess of the wheel, the centering roller moves downward under the push of the first compensation spring until the circumferential surface of the centering roller contacts the tread of the wheel, the circumferential surface of the centering roller and the tread of the wheel form flexible contact, effectively keeping the stability of the wheel rotation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole three-dimensional structure schematic diagram of the present application;

[0019] Figure 2 It is the front view structure schematic diagram of the present application;

[0020] Figure 3 It is the wheel three-dimensional structure schematic diagram in the present application;

[0021] Figure 4 It is the main hydraulic telescopic rod three-dimensional structure schematic diagram in the present application;

[0022] Figure 5 It is the main hydraulic telescopic rod front view structure schematic diagram in the present application;

[0023] Figure 6 It is the bearing seat three-dimensional structure schematic diagram in the present application;

[0024] Figure 7 It is the follow-up plate three-dimensional structure schematic diagram in the present application;

[0025] Figure 8 It is the follow-up plate front view structure schematic diagram in the present application;

[0026] Figure 9 It is the articulated arm three-dimensional structure schematic diagram in the present application;

[0027] Figure 10 It is the articulated arm front view structure schematic diagram in the present application;

[0028] Figure 11 It is the driving rod three-dimensional structure schematic diagram in the present application;

[0029] Figure 12 It is the main roller three-dimensional structure schematic diagram in the present application;

[0030] Figure 13 It is the shell three-dimensional structure schematic diagram in the present application;

[0031] Figure 14 It is the three-dimensional structure schematic diagram of the shell in the application;

[0032] Figure 15 It is the three-dimensional structure schematic diagram of the threaded column and the guide rod in the application in the separated state;

[0033] Figure 16 It is the three-dimensional structure schematic diagram of the fixed block in the application;

[0034] Figure 17 It is the three-dimensional structure schematic diagram of the slide rail and the mounting plate in the application in the separated state.

[0035] In the figure, 1, body; 2, mounting groove; 7, wheel; 10, main roller assembly; 11, centering roller assembly; 12, main hydraulic telescopic rod; 13, articulated arm; 14, centering roller; 15, driving rod; 16, main roller; 17, driving block; 18, cam surface; 19, follower plate; 20, arc-shaped hole; 21, adaptive hole; 22, main pin column; 23, auxiliary pin column; 24, shell; 25, mounting block; 26, guide rod; 27, bottom plate; 28, first compensation spring; 29, limiting ring; 30, clamping plate; 31, sliding block; 32, second compensation spring; 33, limiting block; 34, through hole; 35, adjusting plate; 36, threaded column; 37, guide groove; 38, guide block; 39, buffer hole; 40, push block; 41, adjusting bolt; 42, cover plate; 43, first rotating shaft; 44, first shaft sleeve; 45, second rotating shaft; 46, bearing seat; 58, L-shaped frame; 59, detection camera; 60, mounting plate; 61, side plate; 62, connecting plate; 63, slide rail; 64, slide groove; 65, fixing bolt; 66, fixed block; 67, jackscrew; 68, adjusting bolt; 69, trapezoidal block; 70, vertical bolt; 71, avoiding groove. DETAILED DESCRIPTION

[0036] Please refer to Figures 1-17 , the following detailed description of the application is made in combination with the drawings and examples:

[0037] The synchronous centering mechanism of the wheel rolling mill comprises a main roller assembly 10 slidingly arranged in a mounting groove 2 of a machine body 1 in the left-right direction and a centering roller assembly 11 symmetrically arranged relative to the main roller assembly 10 in the up-down direction, both of the centering roller assemblies 11 are hinged to the machine body 1; a driving part is arranged on the main roller assembly 10, the driving part is used for driving the left ends of the two centering roller assemblies 11 to rotate simultaneously when the main roller assembly 10 moves to the right, and then the right ends of the two centering roller assemblies 11 and the right end of the main roller assembly 10 move synchronously inward, and the right ends of the two centering roller assemblies 11 and the right end of the main roller assembly 10 are always tangent to the circumferential surface of the corresponding virtual circle at any position in the process, and the inscribed circles of the right ends of the two centering roller assemblies 11 and the right end of the main roller assembly 10 are always concentric; the left end of the main roller assembly 10 is provided with a main hydraulic telescopic rod 12, and the main hydraulic telescopic rod 12 is used for driving the main roller assembly 10 to move left and right.

[0038] When the main roller assembly 10 moves to the right, the driving part is driven to move to the right synchronously, so that the driving part drives the left ends of the two centering roller assemblies 11 to rotate synchronously, and then the right ends of the two centering roller assemblies 11 and the right end of the main roller assembly 10 move synchronously and approach each other; the purpose of the right end of the main roller assembly 10 and the right ends of the two centering roller assemblies 11 moving synchronously inward is achieved; in use, the wheel 7 is placed between the right ends of the two centering roller assemblies 11 and the right end of the main roller assembly 10 through a mechanical arm, and then the main roller assembly 10 is driven to move to the right through the main hydraulic telescopic rod 12, so that the right end of the main roller assembly 10 and the right ends of the two centering roller assemblies 11 move synchronously inward to clamp the tread of the wheel 7, and any position of the right end of the main roller assembly 10 and the right ends of the two centering roller assemblies 11 moving synchronously inward has an inscribed circle, and the inscribed circles are concentric, so that the tread of the wheel 7 is effectively clamped.

[0039] In the embodiment, the centering roller assembly 11 comprises a hinged arm 13 and a centering roller 14 rotatably connected to the right end of the hinged arm 13, the middle segment of the hinged arm 13 is hinged to the machine body 1, and the driving part moves to the right to drive the left end of the hinged arm 13 to make the right end of the hinged arm 13 rotate downward.

[0040] In the embodiment, the main roller assembly 10 comprises a driving rod 15 and a main roller 16 rotatably connected to the right end of the driving rod 15, the left end of the driving rod 15 is fixedly arranged with the output end of the main hydraulic telescopic rod 12, the driving rod 15 is arranged in the mounting groove 2 of the machine body 1 and is slidably arranged with the machine body 1 in the left-right direction, the driving part comprises a driving block 17 fixedly arranged on the driving rod 15, the upper part and the lower part of the right side surface of the driving block 17 are both provided with cam curves 18, the articulated arms 13 are provided with a follow-up mechanism, the follow-up mechanism is used to keep the left end of the articulated arm 13 in contact with the cam curve 18 when the driving block 17 moves left and right; when the main hydraulic telescopic rod 12 pushes the driving rod 15 and the main roller 16 to move right, the driving block 17 is also driven to move right, the driving block 17 drives the left end of the articulated arm 13 to rotate through the cam curve 18, and then the right ends of the two articulated arms 13 are rotated to approach each other, and then the two centering rollers 14 are driven to move close to each other, so that the two centering rollers 14 and the main roller 16 move inward synchronously, and the circumferential surfaces of the two centering rollers 14 and the circumferential surface of the main roller 16 are always tangent to the circumferential surface of the corresponding virtual circle at any position in the process, and the inscribed circles of the two centering rollers 14 and the main roller 16 are always concentric; when the main hydraulic telescopic rod 12 drives the driving block 17 to move left, the driving block 17 drives the articulated arm 13 to rotate through the follow-up mechanism, so that the left end of the articulated arm 13 is always in contact with the cam curve 18, and then the right ends of the two articulated arms 13 drive the centering rollers 14 to move away from each other, so as to achieve the purpose of opening the centering mechanism; the cam curve 18 is a continuous smooth simulation curve, when the driving block 17 moves left and right, the left end of the articulated arm 13 is always in contact with the cam curve 18 of the driving block 17, the cam curve 18 makes the position of the centering roller 14 at the right end of the articulated arm 13 always correspond to the position of the main roller 16, so that the circumferential surfaces of the two centering rollers 14 and the circumferential surface of the main roller 16 are tangent to a virtual circumferential surface.

[0041] In the embodiment, the follow-up mechanism comprises two follow-up plates 19, the left end of each follow-up plate 19 is hinged to the machine body 1, the middle part of each follow-up plate 19 is provided with an arc-shaped hole 20 in the left-right direction, and the right part of each follow-up plate 19 is provided with an adaptive hole 21; the front side of each driving block 17 is fixedly provided with a main pin column 22 located in the corresponding arc-shaped hole 20, and the left part of the front side of each hinged arm 13 is fixedly provided with a secondary pin column 23 located in the corresponding adaptive hole 21; in use, when the driving block 17 moves to the right, the driving block 17 drives the left end of the hinged arm 13 to rotate through the cam surface 18, and then the right end of the hinged arm 13 moves to each other and approaches, at the same time, the main pin column 22 drives the right end of the follow-up plate 19 to move to each other and away from each other due to the arc-shaped hole 20, so that the follow-up plate 19 moves following the left end of the hinged arm 13 and does not interfere with the movement of the hinged arm 13; when the driving block 17 moves to the left, the cam surface 18 of the driving block 17 is away from the left end of the hinged arm 13, at this time, the main pin column 22 moves to the left in a straight line, and due to the arc-shaped hole 20, the main pin column 22 drives the right end of the follow-up plate 19 to move to each other and approach, so that the right end of the follow-up plate 19 drives the left end of the hinged arm 13 to move to each other and approach through the cooperation of the secondary pin column 23 and the adaptive hole 21, so that the left end of the hinged arm 13 is always in contact with the cam surface 18 of the driving block 17, and then the right end of the hinged arm 13 drives the centering roller 14 to move to each other and away from each other, so as to achieve the purpose of opening the centering mechanism, and facilitate the taking out of the wheel 7.

[0042] The arc-shaped hole 20 and the adaptive hole 21 of the follow-up plate 19 described above need to meet two conditions: when the driving block 17 moves to the right, the follow-up plate 19 moves following and does not interfere with the movement of the left end of the hinged arm 13; when the driving block 17 moves to the left, the follow-up plate 19 drives the left end of the hinged arm 13 to move to each other and approach, so that the left end of the hinged arm 13 is always in contact with the corresponding cam surface 18.

[0043] In actual use, the tread of the wheel 7 formed by hot forging may be a slightly irregular circle, and since the circumferential surface of the main roller 16 and the two centering rollers 14 is always tangent to the circumferential surface of a virtual circle when moving inward, it may cause that the centering roller 14 or the main roller 16 does not contact the tread of the wheel 7, which will cause the wheel 7 to rotate unstably, in order to solve this problem, in the embodiment, the first compensation mechanism is arranged between the hinged arm 13 and the centering roller 14; the second compensation mechanism is arranged between the driving rod 15 and the main roller 16; the first compensation mechanism is used to drive the centering roller 14 to move inward and contact the tread of the wheel 7 when the centering roller 14 does not contact the tread of the wheel 7 during clamping the wheel 7; the second compensation mechanism is used to drive the main roller 16 to move inward and contact the tread of the wheel 7 when the main roller 16 does not contact the tread of the wheel 7 during clamping the wheel 7; so as to ensure that the wheel 7 rotates stably.

[0044] The angle orientation words in the embodiment are based on Figure 14 The first compensation mechanism comprises a housing 24 fixedly arranged at the right end of the articulated arm 13, the centering roller 14 is rotationally connected inside the mounting block 25, the upper end surface of the mounting block 25 is fixedly provided with a guide rod 26, the guide rod 26 is arranged in the housing 24 in the up-down direction; the bottom plate 27 is fixedly arranged on the guide rod 26 in the housing 24, the first compensation spring 28 is sleeved on the guide rod 26 in the housing 24, the bottom end of the first compensation spring 28 is fixedly arranged with the bottom plate 27, the limiting ring 29 is fixedly arranged in the housing 24 above the bottom plate 27; the mounting block 25 and the right end surface of the articulated arm 13 are arranged in the up-down direction; if the tread of the wheel 7 is a regular circle, when the centering roller 14 and the main roller 16 clamp the wheel 7, the centering roller 14 is extruded to make the mounting block 25, the guide rod 26 and the bottom plate 27 move upward until the upper end surface of the bottom plate 27 abuts against the lower end surface of the limiting ring 29, the circumferential surface of the centering roller 14 and the tread of the wheel 7 form rigid contact; if the tread of the wheel 7 is a slightly irregular circle, when the centering roller 14 and the main roller 16 clamp the wheel 7, if the circumferential surface of the centering roller 14 just contacts the irregular recess of the wheel 7, the centering roller 14 moves downward under the push of the first compensation spring 28 until the circumferential surface of the centering roller 14 contacts the tread of the wheel 7, the circumferential surface of the centering roller 14 and the tread of the wheel 7 form flexible contact, which effectively keeps the wheel 7 rotating stably; when the wheel 7 rotates for hot rolling, the irregular part of the wheel 7 shifts along the circumference, the centering roller 14 and the main roller 16 make adaptive compensation contact periodically to ensure the wheel 7 rotates stably; if one of the centering rollers 14 contacts the irregular protrusion of the wheel 7, the other centering roller 14 and the main roller 16 make compensation contact.

[0045] In the embodiment, the main roller 16 is rotationally connected in the two clamping plates 30, the driving rod 15 is slidingly arranged in the two clamping plates 30 along the left-right direction, the second compensation mechanism comprises sliding blocks 31 slidingly arranged on the upper end face and the lower end face of the driving rod 15 along the left-right direction, each sliding block 31 is fixedly arranged with each clamping plate 30, the second compensation spring 32 is fixedly arranged between the driving block 17 and each sliding block 31, the upper end face and the lower end face of the driving rod 15 are fixedly arranged with the limiting block 33, the limiting block 33 is provided with the through hole 34, and the second compensation spring 32 penetrates through the through hole 34 of the limiting block 33; if the tread of the wheel 7 is a regular circle, when the centering roller 14 and the main roller 16 clamp the wheel 7, the main roller 16 is extruded to make the main roller 16 slide along the driving rod 15 to the left through the clamping plate 30 until the sliding block 31 abuts against the right side face of the limiting block 33, the circumferential surface of the main roller 16 and the tread of the wheel 7 form rigid contact, and the rotation of the wheel 7 is effectively kept stable; if the tread of the wheel 7 is a slightly irregular circle, when the centering roller 14 and the main roller 16 clamp the wheel 7, if the circumferential surface of the main roller 16 just contacts the irregular recess of the wheel 7, the circumferential surface of the main roller 16 moves to the right under the pushing of the second compensation spring 32 until the circumferential surface of the main roller 16 contacts the tread of the wheel 7, the circumferential surface of the main roller 16 and the tread of the wheel 7 form flexible contact, and the rotation of the wheel 7 is effectively kept stable; when the wheel 7 rotates for hot rolling, the irregular part of the wheel 7 shifts along the circumference, and the centering roller 14 and the main roller 16 periodically make adaptive compensation contact to ensure that the wheel 7 rotates stably; if the main roller 16 contacts the irregular protrusion of the wheel 7, the other two centering rollers 14 make compensation contact.

[0046] In order to adjust the pre-tightening force of the first compensation spring 28 in use, in the embodiment, the top end of the first compensation spring 28 is fixedly arranged with the adjusting plate 35, the adjusting plate 35 is slidingly arranged in the housing 24 along the up-down direction, the upper end face of the adjusting plate 35 is rotationally connected with the threaded column 36, and the outer surface of the threaded column 36 is threadedly connected with the housing 24; the guide rod 26 is sleeved in the adjusting plate 35 and the threaded column 36; in use, if the elasticity of the first compensation spring 28 is weakened, the threaded column 36 is rotated to move downward along the housing 24, the threaded column 36 drives the adjusting plate 35 to move downward, and the first compensation spring 28 is compressed to increase the pre-tightening force of the first compensation spring 28.

[0047] In the embodiment, the outer surface of the guide rod 26 is provided with the guide groove 37 along the up-down direction, the inner side wall of the adjusting plate 35 is fixedly arranged with the guide block 38 matched with the guide groove 37, and the adjusting plate 35 moves up and down by the guide block 38 sliding up and down in the guide groove 37 to limit the rotation of the adjusting plate 35.

[0048] In order to adjust the pre-tightening force of the second compensation spring 32 in use, in the embodiment, a buffer hole 39 is formed in the corresponding position of the driving block 17 and the second compensation spring 32 in the left-right direction, a push block 40 fixedly arranged at the left end of the second compensation spring 32 is slidably arranged in the buffer hole 39 in the left-right direction, an adjusting bolt 41 is rotatably connected to the left side surface of the push block 40, a cover plate 42 is threadedly connected to the outer surface of the adjusting bolt 41, and the cover plate 42 is fixedly arranged on the driving block 17. In use, if the elasticity of the second compensation spring 32 is weakened, the adjusting bolt 41 can be rotated to move the adjusting bolt 41 to the right, and then the adjusting bolt 41 drives the push block 40 to move to the right, thereby compressing the second compensation spring 32 to increase the pre-tightening force of the second compensation spring 32.

[0049] In the embodiment, a first rotating shaft 43 is fixedly arranged in the upper hinged arm 13, the portions of the first rotating shaft 43 located on both sides of the upper hinged arm 13 are rotatably connected to first shaft sleeves 44, and each first shaft sleeve 44 is fixedly arranged on the machine body 1. The upper hinged arm 13 rotates in the first shaft sleeves 44 through the first rotating shaft 43.

[0050] In the embodiment, a second rotating shaft 45 is fixedly arranged in the lower hinged arm 13, bearings 46 are rotatably connected to both ends of the second rotating shaft 45, and each bearing 46 is fixedly arranged on the machine body 1. The lower hinged arm 13 rotates in the bearings 46 through the second rotating shaft 45.

[0051] In the embodiment, an L-shaped bracket 58 is fixedly arranged on the front side of the machine body 1, and a detection camera 59 is fixedly arranged on the L-shaped bracket 58 in the front-rear direction. The center of the incircle of the main roll 16 and the two centering rolls 14 is fixed. When the wheel 7 is hot-rolled, after the wheel 7 is hot-rolled to the required standard, the wheel 7 is detected by the detection camera 59, and the trajectory of the center of the wheel 7 in the rotating process is calculated. The trajectory of the center of the wheel 7 in the rotating process is an irregular figure around the center of the incircle of the main roll 16 and the two centering rolls 14. The farthest distance between the irregular figure and the center of the incircle of the main roll 16 and the two centering rolls 14 is calculated. If the distance is within the set range, it represents that the tread of the wheel 7 is a required circle. If the distance exceeds the set range, it represents that the irregularity of the circle of the tread of the wheel 7 exceeds the range, and the hot-rolling needs to be continued.

[0052] In the embodiment, the mounting block 25 comprises a mounting plate 60 and two side plates 61 arranged at the lower end surface of the mounting plate 60, and the centering roller 14 is rotatably connected between the two side plates 61; the upper end surface of the mounting plate 60 is fixedly arranged with the shell 24; a connecting plate 62 is fixedly arranged between the two side plates 61, and an adjusting structure is arranged between the connecting plate 62 and the mounting plate 60, which is used to adjust the front and back positions of the two side plates 61 and the connecting plate 62 relative to the mounting plate 60, so that the centering roller 14 can adapt to the position of the wheel 7.

[0053] In the embodiment, the adjusting mechanism comprises a sliding rail 63 fixedly arranged at the upper end surface of the connecting plate 62 in the front and back direction, and the lower end surface of the mounting plate 60 is provided with a sliding groove 64 matched with the sliding rail 63 in the front and back direction; the front and back side surfaces of the mounting plate 60 are fixedly provided with fixed blocks 66 through two fixed bolts 65, and the fixed blocks 66 are provided with a jackscrew 67 and an adjusting bolt 68; the jackscrew 67 is threadedly connected with the fixed block 66, and the adjusting bolt 68 is rotatably connected with the fixed block 66; the head of the jackscrew 67 abuts against the end surface of the sliding rail 63, and the adjusting bolt 68 is threadedly connected with a threaded hole arranged on the end surface of the sliding rail 63; when adjusting the front and back positions of the centering roller 14, first, the jackscrew 67 is screwed to make the jackscrew 67 exit from the inside of the fixed block 66, so that the head of the jackscrew 67 is separated from the end surface of the sliding rail 63; then, the adjusting bolt 68 is rotated to make the sliding rail 63 move forward and backward in the sliding groove 64 of the mounting plate 60, so that the sliding rail 63 drives the centering roller 14 to move forward and backward relative to the mounting plate 60 through the connecting plate 62 and the two side plates 61, thereby achieving the purpose of adjusting the front and back positions of the centering roller 14, so as to better contact the tread of the wheel 7.

[0054] In order to realize the detachable and mountable purposes of the slide rail 63 and the mounting plate 60, in the embodiment, the slide rail 63 is an inverted isosceles trapezoidal structure, the slide groove 64 is a right trapezoidal structure, the right angle edge in the slide groove 64 is fixedly provided with a trapezoidal block 69 in the front-rear direction, the inclined edge of the trapezoidal block 69 is matched with the space formed by the slide groove 64 and the slide rail 63; the trapezoidal block 69 is fixedly provided with the mounting plate 60 through a vertical bolt 70; when disassembling, the fixed bolt 65 is first disassembled, the adjusting bolt 68 is rotated to be separated from the slide rail 63, then the vertical bolt 70 is disassembled, and the trapezoidal block 69 can be disassembled, at this time, the slide rail 63 can be separated from the slide groove 64, and the purpose of disassembling the centering roller 14 is realized; when mounting, the two side plates 61 and the connecting plate 62 are placed in the slide groove 64 through the slide rail 63, then the trapezoidal block 69 is mounted and fixed in the slide groove 64 of the mounting plate 60 through the vertical bolt 70, the mounting of the centering roller 14 is realized, then the fixed block 66 is fixed on the mounting plate 60 through the fixed bolt 65, the top pin 67 is mounted on the mounting plate 60, when mounting the fixed block 66, the adjusting bolt 68 needs to be screwed into the threaded hole of the slide rail 63 first, so that the fixed block 66 can be attached to the end face of the mounting plate 60, and then the fixed block 66 is mounted and fixed; the head of the top pin 67 is in contact with the slide rail 63, and the purpose of locking the slide rail 63 is realized; the side surface of the shell 24 is provided with a avoiding groove 71, and the nut of the vertical bolt 70 is located in the avoiding groove 71, so as to facilitate the disassembly and mounting of the vertical bolt 70.

[0055] The working principle of the present application is as follows: when in use, the calcined wheel 7 is clamped by a mechanical arm and placed between the two centering rollers 14 and the main roller 16; when the driving rod 15 is pushed to move rightwards by the main hydraulic telescopic rod 12, the driving block 17 is driven to move rightwards, the left end of the articulated arm 13 is driven to rotate by the cam surface 18 of the driving block 17, and the right end of the articulated arm 13 is moved to approach each other; so that the two centering rollers 14 and the main roller 16 move inward to clamp the tread of the wheel 7, and the wheel 7 rotates during hot rolling to drive the main roller 16 and the centering roller 14 to rotate.

[0056] When the driving block 17 moves leftwards, the cam surface 18 of the driving block 17 is away from the left end of the articulated arm 13, at this time, the main pin column 22 moves leftwards in a straight line, due to the relationship of the arc-shaped hole 20, the main pin column 22 drives the right end of the follower plate 19 to move to approach each other, so that the right end of the follower plate 19 drives the left end of the articulated arm 13 to move to approach each other through the cooperation of the auxiliary pin column 23 and the adaptive hole 21, so that the left end of the articulated arm 13 is always in contact with the cam surface 18 of the driving block 17, and the right end of the articulated arm 13 drives the centering roller 14 to move to move away from each other, so as to realize the purpose of opening the centering mechanism and facilitate the taking out of the wheel 7.

Claims

1. A synchronous centering mechanism for a wheel rolling mill, characterized in that: The system includes a main roll assembly (10) that slides in the mounting groove (2) of the machine body (1) in the left-right direction and a centering roll assembly (11) that is symmetrically arranged relative to the main roll assembly (10) in the up-down direction. Both centering roll assemblies (11) are hinged to the machine body (1). The main roll assembly (10) is provided with a drive unit, which is used to drive the left ends of the two centering roll assemblies (11) to rotate simultaneously when the main roll assembly (10) moves to the right, thereby causing the right ends of the two centering roll assemblies (11) to rotate. The right end of the main roll assembly (10) and the right end of the centering roll assembly (11) move inward synchronously, and at any position during this process, the right ends of the two centering roll assemblies (11) and the right end of the main roll assembly (10) are always tangent to the circumferential surface of the corresponding virtual circle, and the inscribed circles of the right ends of the two centering roll assemblies (11) and the right end of the main roll assembly (10) are always concentric; the left end of the main roll assembly (10) is provided with a main hydraulic telescopic rod (12), which is used to drive the main roll assembly (10) to move left and right.

2. The synchronous centering mechanism for wheel rolling mills according to claim 1, characterized in that: The centering roller assembly (11) includes a hinged arm (13) and a centering roller (14) rotatably connected to the right end of the hinged arm (13). The middle section of the hinged arm (13) is hinged to the machine body (1).

3. The synchronous centering mechanism for wheel rolling mills according to claim 2, characterized in that: The main roll assembly (10) includes a drive rod (15) and a main roll (16) rotatably connected to the right end of the drive rod (15). The left end of the drive rod (15) is fixedly set to the output end of the main hydraulic telescopic rod (12). The drive rod (15) is located in the mounting groove (2) of the machine body (1) and is slidably set with the machine body (1) in the left and right direction. The drive unit includes a drive block (17) fixedly set on the drive rod (15). The upper and lower parts of the right side of the drive block (17) are provided with cam surfaces (18). A follower mechanism is provided on the hinge arm (13). The follower mechanism is used to keep the left end of the hinge arm (13) in contact with the cam surface (18) when the drive block (17) moves left and right.

4. The synchronous centering mechanism for wheel rolling mills according to claim 3, characterized in that: The following mechanism includes two following plates (19). The left end of each following plate (19) is hinged to the body (1). An arc-shaped hole (20) is opened in the middle of each following plate (19) along the left and right directions. An adaptation hole (21) is opened on the right side of each following plate (19). A main pin (22) located in the corresponding arc-shaped hole (20) is fixedly provided on the front side of each driving block (17). A secondary pin (23) located in the corresponding adaptation hole (21) is fixedly provided on the left side of the front side of each hinge arm (13).

5. The synchronous centering mechanism for wheel rolling mills according to claim 3, characterized in that: A first compensation mechanism is provided between the articulated arm (13) and the centering roller (14); a second compensation mechanism is provided between the drive rod (15) and the main roller (16); the first compensation mechanism is used to drive the centering roller (14) to move inward to contact the tread surface of the wheel (7) when the centering roller (14) is not in contact with the tread surface of the wheel (7) when clamping the wheel (7); the second compensation mechanism is used to drive the main roller (16) to move inward to contact the tread surface of the wheel (7) when the main roller (16) is not in contact with the tread surface of the wheel (7) when clamping the wheel (7).

6. The synchronous centering mechanism for a wheel rolling mill according to claim 5, characterized in that: The first compensation mechanism includes a housing (24) fixedly disposed at the right end of the hinge arm (13), a centering roller (14) rotatably connected inside the mounting block (25), a guide rod (26) fixedly disposed on the upper end face of the mounting block (25), the guide rod (26) passing through the housing (24) in the vertical direction; a base plate (27) fixedly disposed on the guide rod (26) located inside the housing (24), a first compensation spring (28) sleeved on the guide rod (26) located inside the housing (24), the bottom end of the first compensation spring (28) fixedly disposed with the base plate (27), and a limit ring (29) fixedly disposed inside the housing (24) above the base plate (27).

7. The synchronous centering mechanism for a wheel rolling mill according to claim 5, characterized in that: The main roll (16) is rotatably connected to two clamping plates (30). The drive rod (15) is slidably disposed in the two clamping plates (30) in the left and right direction. The second compensation mechanism includes sliders (31) that are slidably disposed in the left and right direction on the upper and lower end surfaces of the drive rod (15). Each slider (31) is fixedly disposed with each clamping plate (30). A second compensation spring (32) is fixedly disposed between the drive block (17) and each slider (31). A limit block (33) is fixedly disposed on the upper and lower end surfaces of the drive rod (15). A through hole (34) is opened on the limit block (33). The second compensation spring (32) passes through the through hole (34) of the limit block (33).

8. The synchronous centering mechanism for a wheel rolling mill according to claim 6, characterized in that: The top end of the first compensation spring (28) is fixedly provided with an adjustment plate (35), which is slidably disposed in the housing (24) in the up and down direction. The upper end face of the adjustment plate (35) is rotatably connected with a threaded column (36), and the outer surface of the threaded column (36) is threadedly connected to the housing (24). The guide rods (26) are all sleeved in the adjustment plate (35) and the threaded column (36).

9. The synchronous centering mechanism for a wheel rolling mill according to claim 7, characterized in that: The drive block (17) and the second compensation spring (32) are provided with a buffer hole (39) in the left and right direction. A push block (40) is slidably arranged in the buffer hole (39) and fixedly arranged with the left end of the second compensation spring (32). An adjusting bolt (41) is rotatably connected to the left side of the push block (40). A cover plate (42) is threadedly connected to the outer surface of the adjusting bolt (41). The cover plate (42) is fixedly arranged with the drive block (17).

10. The synchronous centering mechanism for a wheel rolling mill according to claim 1, characterized in that: The front side of the machine body (1) is fixedly provided with an L-frame (58), and a detection camera (59) is fixedly provided on the L-frame (58) along the front-back direction.

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