Steel rail centering, positioning and clamping device and steel rail welding seam finish-milling machining system

Abstract

The utility model discloses a steel rail centering, positioning and clamping device and a steel rail welding seam finish-milling machining system, and relates to the technical field of steel rail machining. The steel rail centering, positioning and clamping device comprises a driving mechanism, a supporting plate, a rail head side plane clamping assembly and a rail bottom side plane floating clamping assembly. The number of the supporting plates is two, and the two supporting plates can move towards each other or move away from each other. The rail head side plane clamping assembly comprises two clamping blocks, and the two clamping blocks are arranged on the upper portions of the two corresponding supporting plates. The rail bottom side plane floating clamping assembly comprises two floating clamping blocks, and the two floating clamping blocks are arranged on the lower portions of the two corresponding supporting plates. When the centering, positioning and clamping device is used for pre-clamping a rail head side plane of a corresponding section, the front-back central plane of the rail head can be overlapped with a central plane formed by a corresponding clamp, so that centering and positioning of the rail head and pre-clamping of the rail head side plane are realized, and the precision of a follow-up finish-milling machining standard is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail processing technical field, especially a kind of rail centering positioning clamping device and rail weld fine milling processing system. BACKGROUND

[0002] In rail transit such as subway, light rail, high-speed rail, steel rail is used as guide rail. The production process of steel rail includes: several kinds of short steel rails with length of 25m, 50m, 100m are produced by steel plant; short steel rails are butt welded one by one in production workshop, and after welding, butt weld is processed by pushing tumor, rough milling, heat treatment and fine milling, so that it can be stored or directly transported to construction site for installation.

[0003] Fine milling can finely process the weld area to make it meet the specified flatness standard, thereby improving the comfort and safety of vehicle operation on the track. Fine milling includes: transporting the steel rail to the fine milling station, positioning and clamping the steel rail, detecting the rail head profile and obtaining the fine milling processing reference accordingly, and controlling the cutter to perform fine milling.

[0004] Positioning and clamping affects the accuracy of subsequent fine milling reference and the quality of cutter fine milling, so positioning and clamping the steel rail is a key process in fine milling. Before welding, the steel rail itself is twisted, and after welding, the steel rail is also twisted to some extent, which causes uncertainty in the center plane of the corresponding rail head profile in the welded area. However, the existing positioning and clamping of the steel rail uses rail bottom side centering positioning and clamping, and the center plane of the detection range of the detection point is predetermined, which affects the accuracy of the formed fine milling processing reference and easily causes large fluctuations in steel rail processing quality. Even if the number of detection points is increased, it is impossible to avoid the problem of large fluctuations in processing quality. In addition, the swing center of the cutter for fine milling is predetermined, and the cutter shaft is also predetermined, which causes the actual rail head profile center plane and the fine milling center plane to not coincide, and there is a large uncertainty error, which also causes large fluctuations in steel rail fine milling quality. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a kind of steel rail centering positioning clamping device and steel rail weld fine milling processing system, to solve the problem that the actual rail head profile center plane deviates from the preset center plane when the existing steel rail is positioned and clamped, thereby causing large fluctuations in fine milling quality.

[0006] To achieve the above purpose, the utility model provides a kind of steel rail centering positioning clamping device, which comprises:

[0007] frame;

[0008] a driving mechanism arranged on the frame;

[0009] support plates arranged on the left and right sides of the driving mechanism, and under the driving of the driving mechanism, the two support plates can move towards each other or move away from each other;

[0010] a rail head side plane clamping assembly including two clamping blocks arranged on the upper portions of the two corresponding support plates, for centering positioning of the rail head, and pre-clamping and clamping of the rail head side plane;

[0011] a rail bottom side plane floating clamping assembly including two floating clamping blocks arranged on the lower portions of the two corresponding support plates, for floating clamping of the rail bottom side plane.

[0012] a frame;

[0013] a driving mechanism arranged on the frame;

[0014] support plates arranged on the left and right sides of the driving mechanism, and under the driving of the driving mechanism, the two support plates can move towards each other or move away from each other;

[0015] a rail head side plane clamping assembly including two clamping blocks arranged on the upper portions of the two corresponding support plates, for centering positioning of the rail head, and pre-clamping and clamping of the rail head side plane;

[0016] a rail bottom side plane floating clamping assembly including two floating clamping blocks arranged on the lower portions of the two corresponding support plates, for floating clamping of the rail bottom side plane.

[0017] In an embodiment, the lower portion of the support plate is provided with a guide hole;

[0018] The rail bottom side plane floating clamping assembly further includes a spring and a guide rod, the guide rod can move back and forth along the guide hole, one end of the guide rod is connected with the floating clamping block, and the spring is arranged between the floating clamping block and the guide hole.

[0019] In an embodiment, the other end of the guide rod is provided with a limiting piece, and the length of the limiting piece is greater than the hole diameter of the guide hole.

[0020] In an embodiment, the driving mechanism includes a bidirectional screw rod rotatably arranged on the frame, and nuts arranged on the two sides of the bidirectional screw rod, and the two support plates are connected with the two corresponding nuts.

[0021] The two support plates can move towards each other when the bidirectional screw rotates in one direction, and the two support plates can move away from each other when the bidirectional screw rotates in the other direction.

[0022] In an embodiment, the driving mechanism further comprises two limiting grooves arranged on the rack, and the two limiting grooves are arranged in one-to-one correspondence with the two support plates.

[0023] In an embodiment, the rail centering and positioning clamping device further comprises a rail bottom surface supporting block and a rail top pressing block arranged on the rack, and a conveying device for conveying the rail, wherein the rail bottom surface supporting block is used for upwardly supporting the rail, and the rail top pressing block is used for downwardly pressing the rail.

[0024] In an embodiment, the rail bottom surface supporting block is arranged on the rack in a movable manner, and the rail top pressing block is fixedly arranged on the rack.

[0025] In an embodiment, the rail bottom surface supporting block is connected with a telescopic rod of a hydraulic cylinder.

[0026] The utility model also proposes a rail weld joint fine milling processing system, including the rail centering and positioning clamping device of any one of the above.

[0027] In an embodiment, the rail weld joint fine milling processing system further comprises a detection device and a fine milling device, the detection device is used for non-contact acquisition of rail head cross section profiles of front sides and rear sides of butt weld joints, and a fine milling processing reference is generated based on the acquired cross section profiles; the fine milling device is used for fine milling processing of the rail head according to the fine milling processing reference.

[0028] In the technical field of the utility model, when the centering and positioning clamping device pre-clamps the rail head side plane of the corresponding section, the front and rear center planes of the rail head can be made to coincide with the center plane formed by the corresponding clamp, so that the centering and positioning of the rail head and the pre-clamping of the rail head side plane are realized, the accuracy of the subsequent fine milling processing reference is improved, and the quality of the fine milling processing is ensured. While pre-clamping the rail head side plane, the rail bottom side plane is also floatingly clamped, the stability of the subsequent further clamping operation process is ensured, and the centering and clamping of the rail head are realized. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.

[0030] Figure 1 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0031] Figure 2 For Figure 1 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0032] Figure 3 For Figure 1 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0033] Figure 4 For Figure 3 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0034] Figure 5 For Figure 1 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0035] Figure 6 For Figure 5 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0036] Figure 7 For Figure 6 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0037] Figure 8 For Figure 5 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0038] Figure 9 For Figure 5 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0039] Figure 10 For Figure 5 The utility model provides an embodiment's stereoscopic structure schematic diagram of intelligent visual guidance steel rail weld fine milling processing system provided by the utility model;

[0040] Explanation of figure mark:

[0041] 1, rack; 2, conveying device; 3, centering positioning and clamping device; 31, support plate; 311, guide hole; 32, clamping block; 321, rail head guide channel; 33, floating clamping block; 331, guide rod; 332, elastic member; 333, limiting member; 334, rail bottom guide channel; 34, rail bottom plane support block; 35, rail top pressing block; 36, bidirectional screw; 37, nut; 38, limiting groove; 39, hydraulic oil cylinder; 41, first sliding table; 42, second sliding table; 43, third sliding table; 44, fourth sliding table; 51, support; 52, 2D visual identification camera; 61, cylindrical milling cutter; 62, ball head cutter; 7, steel rail; 71, butt weld; 72, rail head cross-sectional profile; 73, rail top; 74, rail bottom plane; 751, left side plane of rail head; 752, right side plane of rail head; 761, left top curved surface of rail head; 762, right top curved surface of rail head; 763, small curvature section; 764, large curvature section; 77, center plane; 771, left side plane of rail bottom; 772, right side plane of rail bottom; 78, positioning and clamping section.

[0042] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0044] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0045] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0046] Please refer to Figure 1 And Figure 2 The utility model proposes a kind of intelligent visual guidance rail weld fine milling processing system, comprising: rack 1, conveying device 2, centering positioning clamping device 3, detection device, fine milling device and fine milling control system;The rack 1 has feeding station, positioning clamping station, detection station and fine milling station, wherein the positioning clamping station is distributed in the front side and rear side of the fine milling station, and the detection station is correspondingly laid with the fine milling station;The conveying device 2 is set corresponding to the feeding station, to convey rail 7 forward along the length direction of rail 7;The centering positioning clamping device 3 is set corresponding to the clamping station, to carry out centering positioning to corresponding rail head and pre-clamping to rail head side plane, after rail head and rail bottom are clamped, greater clamping force is applied to rail head side plane to clamp rail head side plane;Please refer to Figure 5 The detection device is set corresponding to the detection station, to non-contact acquisition rail head section profile 72 of the front side and rear side of butt joint weld 71, and generates fine milling processing reference based on the collected rail head section profile 72;The fine milling device is set corresponding to the fine milling station, to carry out fine milling processing to the rail head of butt joint weld area;The fine milling control system is connected with the detection device, and is electrically connected with the fine milling device, for controlling the movement of the fine milling device according to fine milling processing reference, to realize the fine milling processing to the rail head of butt joint weld area.

[0047] The utility model discloses a technical method for the fine milling of a steel rail, which comprises a conveying device 2, a centering and positioning clamping device 3 and a fine milling device 4. Figure 8 The utility model discloses a technical method for the fine milling of a steel rail, which comprises a conveying device 2, a centering and positioning clamping device 3 and a fine milling device 4.

[0048] The utility model discloses a technical method for the fine milling of a steel rail, which comprises a conveying device 2, a centering and positioning clamping device 3 and a fine milling device 4. Figure 3 The utility model discloses a technical method for the fine milling of a steel rail, which comprises a conveying device 2, a centering and positioning clamping device 3 and a fine milling device 4. The utility model discloses a technical method for the fine milling of a steel rail, which comprises a conveying device 2, a centering and positioning clamping device 3 and a fine milling device 4.

[0049] By adopting the technical scheme, one support plate 31 is distributed on the left side of the steel rail 7, and the other support plate 31 is distributed on the right side of the steel rail 7. Under the driving of the driving mechanism, the two support plates 31 can move towards each other or move away from each other. The upper part of each support plate 31 is provided with a clamping block 32, and the lower part is provided with a floating clamping block 33. When it is needed to center and pre-clamp the corresponding positioning and clamping section 78, the two support plates 31 are driven to move towards each other, so that the two corresponding clamping blocks 32 and the two corresponding floating clamping blocks 33 all move towards each other by a preset stroke, so as to center and pre-clamp the rail head and the rail head side plane, and also floatingly clamp the rail bottom side plane. Conversely, when it is needed to loosen the steel rail 7, the two support plates 31 are driven to move away from each other.

[0050] It can be understood that, referring to Figure 8 , a front-rear center plane 77 is formed between the two clamping blocks 32, and the center plane 77 is predetermined. In the process of pre-clamping the rail head side plane by the two clamping blocks 32, the front-rear center plane 77 of the rail head can coincide with the center plane 77 formed by the two clamping blocks, so as to realize the centering and pre-clamping of the rail head side plane and the floating clamping of the rail bottom side plane. Since the rail bottom side plane is floatingly clamped, the rail bottom can still move up and down. At this time, a rail bottom guide channel 334 is formed between the two corresponding floating clamping blocks 33. When the two clamping blocks 32 pre-clamp the rail head side plane, the clamping force exerted by the two clamping blocks 32 on the rail head is small. At this time, the rail head can still move up and down, and a rail head guide channel 321 is formed between the two corresponding clamping blocks 32. Referring to Figure 4 .

[0051] In order to enable the floating clamping block 33 to floatingly clamp the rail bottom side plane, in the embodiment of the utility model, referring to Figure 4 , the lower part of the support plate 31 is provided with a guide hole 311; the rail bottom side plane floating clamping assembly further comprises an elastic member 332 and a guide rod 331. The guide rod 331 can move back and forth along the guide hole 311, and one end of the guide rod 331 is connected with the floating clamping block 33. The elastic member 332 is arranged between the floating clamping block 33 and the guide hole 311.

[0052] By adopting the above technical scheme, the guide rod 331 can move left and right along the corresponding guide hole 311, the floating clamp block 33 is fixed at one end of the corresponding guide rod 331, and the elastic member 332 is arranged between the guide hole 311 and the floating clamp block 33; when it is necessary to clamp the rail bottom side plane, the two floating clamp blocks 33 move towards each other and act on the left rail bottom side plane 771 and the right rail bottom side plane 772, and the elastic member 332 is in an elastic deformation state, and the elastic member 332 has a restoring force, so that the floating clamp block 33 can stably clamp the rail bottom side plane.

[0053] Specifically, the elastic member 332 is a disc spring, one end of the disc spring is connected with the corresponding floating clamp block 33, and the other end is connected with the hole wall of the end of the corresponding guide hole 311. The other end of the guide rod 331 is provided with a limiting member 333, the length of the limiting member 333 is greater than the hole diameter of the guide hole 311, and the limiting member 333 can prevent the guide rod 331 from being separated from the guide hole 311. It can be understood that the length of the floating clamp block 33 is also greater than the hole diameter of the guide hole 311.

[0054] Further, the driving mechanism comprises a bidirectional screw rod 36 rotatably arranged on the rack 1, and nuts 37 arranged on both sides of the bidirectional screw rod 36, and two support plates 31 are connected with the corresponding two nuts 37; when the bidirectional screw rod 36 rotates in one direction, the two support plates 31 can move towards each other; when the bidirectional screw rod 36 rotates in the other direction, the two support plates 31 can move away from each other.

[0055] By adopting the above technical scheme, one side of the bidirectional screw rod 36 is provided with a left-handed thread, the other side is provided with a right-handed thread, one of the nuts 37 is threadedly connected with the left-handed thread, the other nut 37 is threadedly connected with the right-handed thread, each support plate 31 is connected with the corresponding nut 37, and is distributed on the left and right sides of the steel rail 7; similarly, the two clamp blocks 32 are also distributed towards each other, and are distributed on the left and right sides of the steel rail 7, and the two floating clamp blocks 33 are also distributed towards each other, and are distributed on the left and right sides of the steel rail 7.

[0056] Further, the driving mechanism further comprises two limiting grooves 38 arranged on the rack 1, and the two limiting grooves 38 are arranged in one-to-one correspondence with the two support plates 31. When the bidirectional screw rod 36 is driven to rotate, the support plate 31 can move along the corresponding limiting groove 38, so that the support plate 31 can stably drive the floating clamp block 33 and the clamp block 32 to move. It can be understood that the support plate 31 extends out of the corresponding limiting groove 38, so as to be connected with the clamp block 32 and the floating clamp block 33.

[0057] The centering and clamping device 3 further comprises a rail bottom plane support block 34 movably arranged on the frame 1, and a rail top pressing block 35 fixedly arranged on the frame 1, the rail bottom plane support block 34 is used for supporting the steel rail 7 upwardly, and the rail top pressing block 35 is used for pressing the steel rail 7 downwardly.

[0058] By adopting the above technical scheme, the rail bottom plane support block 34 is located below the rail top pressing block 35, when the butt joint weld 71 of the steel rail 7 is conveyed forward to the position corresponding to the fine milling station by the conveying device 2, at this time, the structure for supporting the steel rail 7 is the conveying device 2, the rail bottom plane support block 34 is located below the steel rail 7, the rail top pressing block 35 is located above the steel rail 7, and the clamping blocks 32 and the floating clamping blocks 33 are distributed on the left and right sides of the steel rail 7. The bidirectional screw 36 is driven to rotate, the clamping blocks 32 are used for centering and positioning the rail head and pre-clamping the side plane of the rail head, and at the same time, the floating clamping blocks 33 are used for floating clamping the side plane of the rail bottom. The rail bottom plane support block 34 is driven to move upwardly, the rail bottom plane support block 34 is in contact with the rail bottom plane 74 and moves the steel rail 7 upwardly, in this process, the rail bottom moves upwardly along the rail bottom guide channel 334, and the rail head moves upwardly along the rail head guide channel 321, until the rail top 73 abuts against the rail top pressing block 35, the bidirectional screw 36 is driven to rotate, so that the clamping blocks 32 exert a larger clamping force on the side plane of the rail head to clamp the side plane of the rail head, and the positioning and clamping of the steel rail in the welded joint area are realized.

[0059] In order to better drive the rail bottom plane support block 34 to move upwardly and downwardly, the steel rail welded joint fine milling system further comprises a hydraulic oil cylinder 39 arranged on the frame 1, and a telescopic rod of the hydraulic oil cylinder 39 is connected with the rail bottom plane support block 34. The hydraulic oil cylinder 39 is used for driving the corresponding rail bottom plane support block 34 to move upwardly and downwardly. The driving device for driving the bidirectional screw to rotate is a motor.

[0060] In order to obtain the fine milling processing reference, the detection device comprises two sets, one set of detection device is distributed on the left side of the steel rail 7, and the other set of detection device is distributed on the right side of the steel rail 7, and the two sets of detection devices are located between the two sets of centering and clamping devices 3. Each set of detection device comprises a support 51 movably arranged on the frame 1, a 2D visual identification camera 52 mounted on the support 51, and a data processing unit in communication connection with the 2D visual identification camera 52, and the support 51 can move forwardly and backwardly, and upwardly and downwardly.

[0061] By adopting the above technical scheme, referring to Figure 5For the detection device located on the left side of the butt weld 71, the 2D visual recognition camera 52 can collect three rail head section profiles 72 on the back side of the butt weld 71, wherein the distance L1 between the first rail head section profile 72 and the butt weld 71 is 500 mm, the distance L2 between the second rail head section profile 72 and the butt weld 71 is 460 mm, and the distance L3 between the third rail head section profile 72 and the butt weld 71 is 420 mm. For the detection device located on the right side of the butt weld 71, the 2D visual recognition camera 52 can collect three rail head section profiles 72 on the front side of the butt weld 71, wherein the distance L4 between the fourth rail head section profile 72 and the butt weld 71 is 420 mm, the distance L5 between the fifth rail head section profile 72 and the butt weld 71 is 460 mm, and the distance L6 between the sixth rail head section profile 72 and the butt weld 71 is 500 mm. The 2D visual recognition camera 52 sends the information of the respective collected rail head section profiles 72 to the data processing unit. For each rail head section profile 72, the data processing unit can extract 60-200 feature points, i.e. 60-200 point cloud data, form a corresponding curve according to the point cloud data, and form a 3D curved surface according to the curve, so as to obtain a rail head fine milling processing reference with a front and rear feeding stroke of 1000 mm and the butt weld 71 as the center. The data processing unit also sends the generated fine milling processing reference to the fine milling control system. It can be understood that the distances L2, L3, L4 and L5 can be adjusted according to the processing requirements.

[0062] In order to enable the bracket 51 to move in the front and rear directions and the up and down directions, the intelligent visual guidance steel rail weld fine milling processing system further comprises a sliding table corresponding to the bracket 51, which comprises a first sliding table 41 arranged on the rack 1 and movable in the front and rear directions, and a second sliding table 42 arranged on the first sliding table 41 and movable in the up and down directions, and the bracket 51 is arranged on the second sliding table 42.

[0063] In order to fine mill, the intelligent visual guidance steel rail 7 weld fine milling processing system further comprises a third sliding table 43 and a fourth sliding table 44 arranged on the second sliding table 42, both of which are arranged on the second sliding table 42 and movable left and right. Each set of fine milling device is located below the corresponding 2D visual recognition camera 52. Each set of fine milling device comprises a cylindrical milling cutter 61 mounted on the third sliding table 43 and a ball head cutter 62 mounted on the fourth sliding table 44, the diameter of the cylindrical milling cutter 61 is 25-40 mm, which is used for fine milling the rail head side plane; the diameter of the ball head cutter 62 is 25-40 mm, which is used for fine milling the rail head top curved surface.

[0064] By adopting the above technical scheme, referring to Figures 6 to 10The fine milling control system controls the cylindrical milling cutter 61 on the left to mill the left side plane 751 of the rail head according to the fine milling reference, controls the cylindrical milling cutter 61 on the right to mill the right side plane 752 of the rail head, controls the ball head cutter 62 on the left to mill the left top curved surface 761 of the rail head, and controls the ball head cutter 62 on the right to mill the right top curved surface 762 of the rail head. The rotating speed of each cylindrical milling cutter 61 and each ball head cutter 62 during fine milling is 1800-2500 rpm, the feeding speed is 2000-2500 mm / min, and the feeding stroke is 1000 mm. The left side plane 751 of the rail head and the right side plane 752 of the rail head can be simultaneously fine milled, and the left top curved surface 761 of the rail head and the right top curved surface 762 of the rail head can be simultaneously fine milled. The left top curved surface 761 of the rail head and the right top curved surface 762 of the rail head are fine milled by alternately milling in the forward direction and the reverse direction, for example, the feeding stroke in the forward direction during the forward milling, and the feeding stroke in the reverse direction during the reverse milling, or vice versa, as long as the feeding strokes of two adjacent fine milling are opposite.

[0065] The number of feedings of the fine milling of the left top curved surface 761 of the rail head and the right top curved surface 762 of the rail head is 25-35, and the cutting width of each feeding is 1-4 mm. Specifically, the left top curved surface 761 of the rail head and the right top curved surface 762 of the rail head include a small curvature section 763 and a large curvature section 764, the cutting width of each feeding of the small curvature section 763 is 1.0-1.5 mm, and the cutting width of each feeding of the large curvature section 764 is 2.0-4.0 mm. It can be understood that the "cutting width" refers to the width of fine milling in the left-right direction.

[0066] In order to avoid the interference between the left top curved surface 761 of the rail head and the right top curved surface 762 of the rail head during fine milling, the feeding stroke of the left top curved surface 761 of the rail head and the feeding stroke of the right top curved surface 762 of the rail head need to be kept consistent in the left-right direction. The "feeding stroke of the left top curved surface 761 of the rail head in the left-right direction" refers to the direction of the line connecting the previous feeding and the next feeding in the left-right direction, and the "feeding stroke of the right top curved surface 762 of the rail head in the left-right direction" can be understood in the same way. For example, the feeding stroke of the left top curved surface 761 of the rail head in the left-right direction is clockwise, and the feeding stroke of the right top curved surface 762 of the rail head in the left-right direction is also clockwise, as shown in FIG. 7. Figure 10 .

[0067] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields based on the technical concept of the present application and the content of the present application are included in the patent protection scope of the present application.

Claims

1. A rail centering and positioning clamping device, characterized in that, The utility model relates to a steel rail centering and clamping device, which comprises a rack, a driving mechanism arranged on the rack, support plates arranged on the left and right sides of the driving mechanism and movable towards or away from each other under the drive of the driving mechanism, a rail head side plane clamping assembly comprising two clamping blocks arranged on the upper parts of the two corresponding support plates for centering and positioning the rail head and pre-clamping and clamping the rail head side plane, and a rail bottom side plane floating clamping assembly comprising two floating clamping blocks arranged on the lower parts of the two corresponding support plates for floating clamping of the rail bottom side plane. The lower part of the support plate is provided with a guide hole. The rail bottom side plane floating clamping assembly further comprises a spring and a guide rod, the guide rod is movable back and forth along the guide hole, one end of the guide rod is connected with the floating clamping block, and the spring is arranged between the floating clamping block and the guide hole. The other end of the guide rod is provided with a limiting piece, and the length of the limiting piece is greater than the hole diameter of the guide hole. The driving mechanism comprises a reversible screw rod rotatably arranged on the rack and nuts arranged on the two sides of the reversible screw rod, and the two support plates are connected with the two corresponding nuts. When the reversible screw rod rotates in one direction, the two support plates can move towards each other, and when the reversible screw rod rotates in the other direction, the two support plates can move away from each other.

2. The rail centering and positioning clamp device of claim 1, wherein, The driving mechanism further comprises two limiting grooves arranged on the rack, and the two limiting grooves are arranged one by one corresponding to the two support plates. The steel rail centering and clamping device further comprises a rail bottom surface supporting block, a rail top pressing block arranged on the rack, and a conveying device for conveying the steel rail, the rail bottom surface supporting block is used for upwardly supporting the steel rail, and the rail top pressing block is used for downwardly pressing the steel rail.

3. The rail centering and positioning clamp of claim 2, wherein, The rail bottom surface supporting block is movably arranged on the rack, and the rail top pressing block is fixedly arranged on the rack.

4. The rail centering and positioning clamp of claim 1 wherein, The rail bottom surface supporting block is connected with the telescopic rod of a hydraulic oil cylinder. The steel rail centering and clamping device comprises the steel rail centering and clamping device according to any one of claims 1-8.

5. The rail centering and positioning clamp of claim 4 wherein, The steel rail weld seam fine milling processing system further comprises a detection device and a fine milling device, the detection device is used for non-contact acquisition of the rail head cross section profile of the front side and the rear side of the butt joint weld seam, and generates a fine milling processing reference based on the acquired cross section profile; and the fine milling device is used for fine milling processing of the rail head according to the fine milling processing reference.

6. The rail centering and positioning clamp of claim 1 wherein, ​ 7. The rail centering and positioning clamp of claim 6 wherein, ​ 8. The rail centering and positioning clamp of claim 7, wherein, ​ 9. A rail weld finish-milling system characterized by, ​ 10. The rail weld finish milling system of claim 9, wherein, ​

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