Rail bottom milling device

Abstract

The utility model discloses a rail bottom milling device which comprises a horizontally-arranged base frame, and a clamping and positioning assembly capable of clamping a steel rail in the width direction of the steel rail is arranged at the top of the base frame. A feeding frame arranged in the horizontal direction and a feeding driving assembly capable of driving the feeding frame to reciprocate in the width direction of the steel rail are arranged at the top of the base frame, and a workbench arranged in the horizontal direction and a lifting driving assembly capable of driving the workbench to ascend and descend in the vertical direction in a reciprocating mode are arranged at the top of the feeding frame. A milling cutter matched with the bottom of the steel rail is arranged at the top of the workbench, and a milling driving motor capable of driving the milling cutter to rotate is further arranged on the workbench. According to the rail bottom milling device, the weld beading at the rail bottom can be effectively removed, the removal efficiency and the removal precision of the weld beading at the rail bottom are improved, and the overall treatment effect of the weld beading of the steel rail is correspondingly optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of railway rail welding assembly and maintenance processing supporting equipment, in particular to a rail bottom milling device. Background Art

[0002] In recent years, with the continuous increase in logistics and passenger transport demand, my country's railway construction has also developed rapidly. As an important load-bearing track for railway trains, the structural performance of steel rails has always been a technical focus in the industry.

[0003] At present, in the process of assembling rails, welding is usually required to complete the splicing and reliable fixation of multiple sections of rails. Accordingly, after welding is completed, weld nodules will inevitably form at the weld seams of the rails. The existence of these weld nodules will directly affect the structural stability of the rails, and further adversely affect the smooth and safe driving of the train. Therefore, after the rails are welded and assembled, these weld nodules usually need to be removed to ensure the structural stability of the rails, so as to ensure the smooth and safe driving of the train.

[0004] At present, in this field, workers generally use grinding equipment such as handheld grinders or nodule pushers to manually remove weld nodules. However, in actual operation, it is easier to remove weld nodules on the top and sides of the rails, while it is more difficult to remove weld nodules on the bottom of the rails. In particular, the operating space at the bottom of the rails is narrow, and the operation process is time-consuming and laborious, with low operating efficiency.

[0005] On the other hand, in actual operation, due to construction needs, it is usually required that a certain gap must be left between the grinding equipment such as the pusher and the main structure of the rail parent material to ensure the smooth operation of the pusher and avoid damaging the main structure of the parent material during the grinding process of removing the weld nodules, which will result in residual weld nodules after the grinding operation is completed. The remaining weld nodules are closely connected to the welds. Because the remaining weld nodules themselves have irregular appearances and stress concentration, they indirectly affect the accuracy of weld flaw detection. At the same time, the remaining weld nodules at the bottom of the rail will affect the overall smoothness of the line when the rails move and tighten.

[0006] In addition, at the current stage, the industry's weld nodule removal operations usually rely on the operator's experience to determine the degree of weld nodule removal and the effect of the operation. Standardized operations cannot be achieved, and the accuracy of the entire operation cannot be guaranteed, resulting in the final weld nodule removal effect being unsatisfactory, causing adverse effects on the corresponding track construction and train operations.

[0007] In view of this, how to improve the removal efficiency and removal accuracy of the rail bottom weld nodule to optimize the corresponding rail weld nodule treatment effect is an important technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0008] The utility model aims to provide a rail bottom milling device, which can effectively remove the weld nodules at the rail bottom, improve the removal efficiency and removal accuracy of the rail bottom weld nodules, and optimize the overall processing effect of the rail weld nodules accordingly.

[0009] In order to solve the above technical problems, the utility model provides a rail bottom milling device, comprising a horizontally arranged base frame, the top of which is provided with a clamping and positioning assembly capable of clamping the rail along the width direction of the rail;

[0010] The top of the base frame is provided with a feed frame arranged in the horizontal direction and a feed drive assembly capable of driving the feed frame to reciprocate along the width direction of the rail, and the top of the feed frame is provided with a workbench arranged in the horizontal direction and a lifting drive assembly capable of driving the workbench to reciprocate and lift in the vertical direction;

[0011] A milling cutter matched with the bottom of the rail is arranged on the top of the workbench, and a milling drive motor capable of driving the milling cutter to rotate is also arranged on the workbench.

[0012] Preferably, it also includes a controller and a first ranging module and a second ranging module communicatively connected to the controller, wherein the first ranging module is adapted to the milling cutter to detect the vertical distance between the weld bump at the bottom of the rail and the milling cutter, and the second ranging module is adapted to the milling cutter to detect the vertical distance between the weld on the bottom surface of the rail and the milling cutter.

[0013] Preferably, the lifting drive assembly includes a lifting motor arranged on the workbench, the lifting motor is communicatively connected to the controller, and a lifting screw arranged in a vertical direction is connected between the output shaft of the lifting motor and the feed frame.

[0014] Preferably, a tool seat is provided on the top of the workbench, and the milling cutter is rotatably set on the tool seat through a vertically set tool shaft, the first ranging module is located at the top of the tool shaft, the second ranging module is set at the top of the tool seat, and the second ranging module is located on one side of the milling cutter.

[0015] Preferably, both the first ranging module and the second ranging module are laser ranging modules.

[0016] Preferably, the clamping and positioning assembly comprises a clamping guide rail fixedly connected to the base frame and extending in the width direction of the rail, a fixed clamping seat is fixedly arranged on the top of one end of the clamping guide rail, a movable clamping seat protruding from the top of the clamping guide rail is slidably arranged on the clamping guide rail, and the fixed clamping seat and the movable clamping seat are clearance-matched in the horizontal direction to form a clamping cavity for the rail to be embedded;

[0017] The clamping and positioning assembly also includes a rocker, a clamping screw is connected between the rocker and the movable clamping seat, and the rocker drives the movable clamping seat to reciprocate along the width direction of the rail through the clamping screw.

[0018] Preferably, a fixed clamping platform is protrudingly provided on an outer wall of one side of the fixed clamping seat facing the movable clamping seat, and the bottom surface of the fixed clamping platform is gap-matched with the top surface of the clamping guide rail to form a fixed clamping groove for the side rail bottom support plate of the steel rail to be embedded and clamped;

[0019] A movable clamping platform is protruded on the outer wall of one side of the movable clamping seat toward the fixed clamping seat, and the bottom surface of the movable clamping platform is gap-matched with the top surface of the clamping guide rail to form a movable clamping groove for the other side rail bottom support plate of the steel rail to be embedded and clamped;

[0020] The fixed clamping slot and the movable clamping slot are both communicated with the clamping cavity.

[0021] Preferably, there are two clamping and positioning assemblies, and the two clamping and positioning assemblies are symmetrically arranged on two sides of the base frame along the length direction of the rail.

[0022] Preferably, the feed drive assembly includes a handwheel arranged on the side wall of the base frame and a feed screw transmission-connected between the handwheel and the feed frame, and the handwheel drives the feed frame to reciprocate along the width direction of the rail through the feed screw.

[0023] Preferably, a plurality of lifting handles are provided on the side walls of the base frame.

[0024] Compared with the above background technology, the rail bottom milling device provided by the utility model, during its operation and use, if it is necessary to remove the weld nodule at the bottom of the rail, the rail bottom milling device can be placed as a whole under the processed rail, and the base frame is located at the corresponding position below the weld where the weld nodule at the bottom of the processed rail is located, and then the processed steel beam is reliably clamped by the clamping and positioning assembly, so as to ensure that the rail bottom milling device and the processed rail are fixed to each other. After being fixed in place, the feed frame is moved as a whole to the vicinity of the weld nodule at the bottom of the rail to be processed by the feed drive assembly, and the workbench is driven to be appropriately lifted and lowered in the vertical direction by the lifting drive assembly, so as to drive the working surface of the milling cutter located on the workbench to reach the position adapted to the bottom end face of the main structure of the rail, so that the working surface of the milling cutter can move along the bottom end face of the main structure of the rail. After being adjusted in place, the milling cutter is located at a position adjacent to the weld nodule at the bottom of the rail, and the rotation axis of the milling cutter is aligned with the weld corresponding to the weld nodule to be processed, and then the milling drive motor can be started to drive the milling cutter to start rotating. When the milling cutter is running, the feed drive assembly is controlled to drive the feed frame to move at a constant speed in the direction of the weld nodule at an appropriate speed. During this process, the milling cutter moves synchronously with the feed frame to complete the milling feed, thereby gradually milling and cleaning the weld nodule at the bottom of the processed rail until the original position of the weld nodule becomes a plane flush with the bottom end surface of the rail main structure, thereby completing a single weld nodule milling operation. After that, the feed frame and the workbench can be reset, and the clamping and positioning assembly can be loosened to release the locking and fixing state between the rail bottom milling device and the processed rail, and then the rail bottom milling device can be moved as a whole to the corresponding position under the next rail where the bottom weld nodule needs to be cleaned, and the above operation process is repeated to complete the milling operation of the next weld nodule. The above operation process is repeated until the milling of the weld nodule at the bottom of the rail under the current working condition is completed. The rail bottom milling device relies on clamping and fixing with the rail, combined with the horizontal movement and vertical lifting of supporting bearing mechanisms such as the feed frame and the workbench, to achieve coordinated adjustment and control of the milling cutter operating position and feeding state, fully ensuring the milling processing effect of the bottom weld nodule of the processed rail, and during the operation, there is no need for workers to manually hold the milling cutter or other direct milling operation tools, and the milling cutter feeding process and position adjustment completely rely on the mechanical transmission of each driving component, effectively improving the operating accuracy and efficiency of the milling cutter, so that the milling processing consistency of multiple bottom weld nodules of the rail is higher, and the bottom weld nodule processing effect of the rail is correspondingly optimized.

[0025] In another preferred embodiment of the present invention, the rail bottom milling device further comprises a controller and a first distance measuring module and a second distance measuring module in communication with the controller, wherein the first distance measuring module and the milling cutter are adapted to detect the vertical distance between the weld bead at the bottom of the rail and the milling cutter, and the second distance measuring module and the milling cutter are adapted to detect the vertical distance between the weld on the bottom surface of the rail and the milling cutter. After the rail bottom milling device is arranged at a corresponding position below the processed rail, the milling cutter is moved to below the weld corresponding to the weld bead at the bottom of the processed rail through the coordinated cooperation of various action mechanisms, and the first distance measuring module is located directly below the weld bead at the bottom of the processed rail. Before implementing the milling operation, the vertical distance between the milling cutter and the weld nodule at the bottom of the rail being processed can be measured by the first distance measuring module, and the vertical distance between the milling cutter and the weld at the bottom of the rail being processed can be measured by the second distance measuring module. The values ​​measured by the two distance measuring modules are subtracted, and the difference obtained is the protruding height of the weld nodule at the bottom of the processed rail relative to the bottom end face of the main structure of the rail, that is, the total axial feed of the milling cutter in this milling operation. After the above-mentioned measurement and difference calculation are completed, the corresponding milling operation of the milling cutter can be completed based on the total axial feed. Since the total axial feed of the milling cutter is calculated after precise measurement, the milling surface of the weld nodule at the bottom of the processed rail can be ensured to be flush with the bottom end face of the main structure of the rail after the milling process, thereby greatly optimizing the milling process of the weld nodule, making the bottom end face of the rail after the weld nodule is removed more regular, and the corresponding rail bearing structure is more stable and reliable, and the train is more stable and safe when running on the rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A structural axonometric diagram of a rail bottom milling device provided by a specific embodiment of the utility model;

[0028] Figure 2 for Figure 1 A front view of

[0029] Figure 3 for Figure 2 A top view of

[0030] Figure 4 for Figure 1 Top view of the matching structure of the milling cutter and the tool holder.

[0031] in:

[0032] 11-base frame; 111-controller; 112-display screen; 113-lifting handle;

[0033] 12-feeding frame; 121-hand wheel; 122-feeding screw;

[0034] 13-working table; 131-lifting motor;

[0035] 14-milling cutter; 140-milling drive motor; 141-first distance measuring module; 142-second distance measuring module; 143-tool holder; 144-tool shaft;

[0036] 15-clamping guide rail; 151-fixed clamping seat; 152-movable clamping seat; 153-clamping chamber; 154-rocker; 155-clamping screw; 156-fixed clamping table; 157-fixed clamping slot; 158-movable clamping table; 159-movable clamping slot. DETAILED DESCRIPTION

[0037] The core of the utility model is to provide a rail bottom milling device, which can effectively remove the weld nodules at the rail bottom, improve the removal efficiency and removal accuracy of the rail bottom weld nodules, and optimize the overall processing effect of the rail weld nodules accordingly.

[0038] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, in the present invention, unless otherwise clearly stipulated and limited, a first feature “on” or “under” a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature therebetween.

[0041] In addition, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] Please refer to Figures 1 to 4 .

[0043] In a specific embodiment, the rail bottom milling device provided by the utility model includes a horizontally arranged base frame 11, and the top of the base frame 11 is provided with a clamping and positioning assembly capable of clamping the rail along the width direction of the rail; the top of the base frame 11 is provided with a feed frame 12 arranged in the horizontal direction and a feed drive assembly capable of driving the feed frame 12 to reciprocate along the width direction of the rail, the top of the feed frame 12 is provided with a workbench 13 arranged in the horizontal direction and a lifting drive assembly capable of driving the workbench 13 to reciprocate and lift in the vertical direction; the top of the workbench 13 is provided with a milling cutter 14 that cooperates with the bottom of the rail, and the workbench 13 is also provided with a milling drive motor 140 capable of driving the milling cutter 14 to rotate.

[0044] During its operation, if it is necessary to remove the weld nodule at the bottom of the rail, the rail bottom milling device can be placed as a whole under the processed rail, and the base frame 11 can be located at the corresponding position below the weld where the weld nodule at the bottom of the processed rail is located. Then, the processed steel beam can be reliably clamped by the clamping and positioning assembly to ensure that the rail bottom milling device and the processed rail are fixed to each other.

[0045] After being fixed in place, the feed frame 12 is moved as a whole to the vicinity of the weld bead at the bottom of the rail to be processed by the feed drive assembly, and the workbench 13 is driven to be appropriately lifted and lowered in the vertical direction by the lifting drive assembly, thereby driving the working surface of the milling cutter 14 located on the workbench 13 to reach the position that matches the bottom end surface of the main structure of the rail, so that the working surface of the milling cutter 14 can move along the bottom end surface of the main structure of the rail. After being adjusted in place, the milling cutter 14 is located near the weld bead at the bottom of the rail, and the rotation axis of the milling cutter 14 is aligned with the weld corresponding to the weld bead to be processed, and then the milling drive motor 140 can be started to drive the milling cutter 14 to start rotating.

[0046] When the milling cutter 14 is running, the feed drive assembly is controlled to drive the feed frame 12 to move at a constant speed in the direction of the weld nodule at an appropriate speed. During this process, the milling cutter 14 moves synchronously with the feed frame 12 to complete the milling feed, thereby gradually milling and cleaning the weld nodule at the bottom of the processed rail, until the original position of the weld nodule is changed back to a plane flush with the bottom end surface of the rail main structure, thereby completing a single weld nodule milling operation. After that, the feed frame 12 and the workbench 13 can be reset, and the clamping and positioning assembly can be loosened to release the locking and fixing state between the rail bottom milling device and the processed rail, and then the rail bottom milling device can be moved as a whole to the corresponding position under the next rail where the bottom weld nodule needs to be cleaned, and the above operation process is repeated to complete the milling operation of the next weld nodule.

[0047] The above operation process is continuously repeated until the milling of the weld nodule at the bottom of the rail under the current working condition is completed. The rail bottom milling device relies on the clamping fixation between the rail and the horizontal movement and vertical lifting of the supporting bearing mechanisms such as the feed frame 12 and the workbench 13 to achieve the coordinated adjustment and control of the working position and feeding state of the milling cutter 14, fully ensuring the milling processing effect of the weld nodule at the bottom of the processed rail, and during the operation, there is no need for the staff to manually hold the milling cutter 14 or other direct milling operation tools, and the feeding process and position adjustment of the milling cutter 14 completely rely on the mechanical transmission of each driving component, which effectively improves the operation accuracy and efficiency of the milling cutter 14, so that the milling processing consistency of the weld nodules at the bottom of the rail is higher, and the processing effect of the weld nodule at the bottom of the rail is correspondingly optimized.

[0048] Specifically, the rail bottom milling device also includes a controller 111 and a first ranging module 141 and a second ranging module 142 which are communicatively connected to the controller 111. The first ranging module 141 is adapted to the milling cutter 14 to detect the vertical distance between the weld bump at the bottom of the rail and the milling cutter 14. The second ranging module 142 is adapted to the milling cutter 14 to detect the vertical distance between the weld on the bottom surface of the rail and the milling cutter 14.

[0049] After the rail bottom milling device is arranged at the corresponding position below the processed rail, the milling cutter 14 is moved to the bottom of the weld corresponding to the processed rail bottom weld bead through the cooperation of various action mechanisms, and the first distance measuring module 141 is located directly below the processed rail bottom weld bead. Before the milling operation is implemented, the vertical spacing between the milling cutter 14 and the current processed rail bottom weld bead can be measured by the first distance measuring module 141 as L1, and the vertical spacing between the milling cutter 14 and the current processed rail bottom weld can be measured by the second distance measuring module 142 as L2. The values ​​measured by these two distance measuring modules are subtracted, and the difference obtained is the protruding height H of the processed rail bottom weld bead relative to the bottom end face of the rail main structure, that is, H = L2-L1, and H is also the total axial feed of the milling cutter 14 in this milling operation.

[0050] After the above-mentioned measurements and difference calculations are completed, the corresponding milling operation of the milling cutter 14 can be completed based on the total axial feed amount. Since the total axial feed amount of the milling cutter 14 is calculated after precise measurement, the milling cutter 14 can ensure that the weld nodule milling processing surface at the bottom of the processed rail is flush with the bottom end surface of the main structure of the rail after milling, thereby greatly optimizing the weld nodule milling processing effect, making the bottom end surface of the rail after removing the weld nodule more regular, and the corresponding rail bearing structure more stable and reliable, and the train is more stable and safer when running on the rail.

[0051] Generally, considering that the horizontal width of the weld nodule at the bottom of the rail under most working conditions is about 3 cm, the horizontal spacing between the first ranging module 141 and the second ranging module 142 can be controlled to 5 cm. Other horizontal spacing sizes can also be selected according to actual working conditions and component layout space to correspond to the positions of the two ranging modules, but the horizontal spacing between the first ranging module 141 and the second ranging module 142 should be greater than 3 cm.

[0052] Furthermore, the lifting drive assembly includes a lifting motor 131 disposed on the workbench 13, the lifting motor 131 is in communication connection with the controller 111, and a lifting screw disposed in the vertical direction is connected between the output shaft of the lifting motor 131 and the feed frame 12. Considering the working intensity of the milling cutter 14 in actual operation and the feed amount of a single milling operation, the axial feed amount of the milling cutter 14 can be controlled in real time by the controller 111, and after a single milling feed is completed, the controller 111 is used to control the milling cutter 14 to temporarily operate, and the controller 111 controls the lifting motor 131 to operate, so as to drive the workbench 13 to be appropriately lifted in the vertical direction, so as to adjust the distance between the milling cutter 14 and the bottom end face of the processed rail main structure to meet the feed amount requirement for the next milling operation. In this way, the controller 111 controls the milling cutter 14 and the lifting motor 131 to operate alternately, thereby realizing the linkage control and step-by-step adjustment feed of the axial feed milling of the milling cutter 14, greatly optimizing the milling processing accuracy and processing effect of the milling cutter 14, and effectively avoiding the overload operation of the milling cutter 14 caused by excessive single milling feed, thereby avoiding damage to the milling cutter 14 due to overload operation, so that the service life of the milling cutter 14 is correspondingly extended, the working condition tolerance of the rail bottom milling device is correspondingly improved, and the overall device is more durable.

[0053] In addition, a cutter seat 143 is provided on the top of the workbench 13, and the milling cutter 14 is rotatably provided on the cutter seat 143 through a vertically provided cutter shaft 144, and the first distance measuring module 141 is located at the top of the cutter shaft 144, and the second distance measuring module 142 is provided at the top of the cutter seat 143, and the second distance measuring module 142 is located at one side of the milling cutter 14. Considering that in actual milling operation, the center of the working surface of the milling cutter 14 needs to be aligned with the weld nodule to be milled, so arranging the first distance measuring module 141 at the top of the cutter shaft 144 helps to further ensure the measurement accuracy of the first distance measuring module 141 for the distance between the weld nodule and the milling cutter 14; and arranging the second distance measuring module 142 at one side of the milling cutter 14 helps to avoid the milling cutter 14 interfering with the measurement process of the second distance measuring module 142.

[0054] Accordingly, the first distance measurement module 141 and the second distance measurement module 142 are both laser distance measurement modules. The measurement accuracy and efficiency of laser distance measurement are both high, and the reliability of corresponding measurement data can be fully guaranteed.

[0055] On the other hand, the clamping and positioning assembly includes a clamping rail 15 fixedly connected to the base frame 11 and extending along the width direction of the rail. A fixed clamping seat 151 is fixedly provided on the top of one end of the clamping rail 15. A movable clamping seat 152 protruding from the top of the clamping rail 15 is slidably provided on the clamping rail 15. The fixed clamping seat 151 and the movable clamping seat 152 are matched with each other in a horizontal direction to form a clamping cavity 153 for the rail to be embedded.

[0056] The clamping and positioning assembly also includes a rocker 154 , and a clamping screw 155 is connected between the rocker 154 and the movable clamping seat 152 . The rocker 154 drives the movable clamping seat 152 to reciprocate along the width direction of the rail through the clamping screw 155 .

[0057] The fixed-axis rotation of the rocker 154 drives the clamping screw 155 to move, thereby driving the movable clamping seat 152 to move appropriately along the clamping guide rail 15, so as to adjust the distance between the movable clamping seat 152 and the fixed clamping seat 151, so as to achieve the purpose of adjusting the width of the clamping cavity 153, so that the clamping cavity 153 can be aligned and adapted to the processed rails of different sizes and reliably clamped and fixed.

[0058] On this basis, a fixed clamping platform 156 is protruded on the outer wall of one side of the fixed clamping seat 151 facing the movable clamping seat 152, and the bottom surface of the fixed clamping platform 156 is gapped with the top surface of the clamping guide rail 15 to form a fixed clamping groove 157 for the bottom rail support plate of one side of the rail to be embedded and clamped; a movable clamping platform 158 is protruded on the outer wall of one side of the movable clamping seat 152 facing the fixed clamping seat 151, and the bottom surface of the movable clamping platform 158 is gapped with the top surface of the clamping guide rail 15 to form an active clamping groove 159 for the bottom rail support plate of the other side of the rail to be embedded and clamped; the fixed clamping groove 157 and the active clamping groove 159 are both connected to the clamping cavity 153. When the processed rail is aligned and clamped to fit in the clamping cavity 153, the support plates on both sides of the rail bottom can be aligned and embedded in the fixed clamping groove 157 and the movable clamping groove 159 respectively and clamped into place, so that the fixed clamping platform 156 and the movable clamping platform 158 can be used to form abutment limit for the two support plates of the rail in the vertical direction, so that the clamping and positioning assembly can form reliable limit for the processed rail in the horizontal and vertical directions, further avoiding loosening or misalignment between the processed rail and the rail bottom milling device during the weld nodule milling process, improving the locking and fixing effect between the rail bottom milling device and the processed rail, and thereby further improving the corresponding rail bottom weld nodule milling processing accuracy and processing effect.

[0059] More specifically, there are two clamping and positioning assemblies, and the two clamping and positioning assemblies are symmetrically arranged on both sides of the base frame 11 along the length direction of the rail. In this way, the two clamping and positioning assemblies cooperate with each other to form a double-point support for the processed rail, thereby further optimizing the adaptation effect between the rail bottom milling device and the processed rail, and making the clamping and fixing structure of the two more balanced, and the structural stress distribution is correspondingly optimized, effectively avoiding the occurrence of excessive concentration of structural stress during the milling process.

[0060] In addition, the feed drive assembly includes a hand wheel 121 disposed on the side wall of the base frame 11 and a feed screw 122 that is transmission-connected between the hand wheel 121 and the feed frame 12. The hand wheel 121 drives the feed frame 12 to reciprocate along the width direction of the rail through the feed screw 122. The hand wheel 121 is easy to operate, and the matching transmission structure between the hand wheel 121 and the feed screw 122 is stable and reliable, which can further optimize the operational convenience and efficiency of the feed drive assembly, and make the position adjustment of the feed frame 12 more accurate and efficient, thereby making the milling feed of the milling cutter 14 more stable and reliable, and the milling processing effect can be correspondingly optimized.

[0061] As shown in the figure, generally, the handwheel 121 and the controller 111 can be arranged at the same end of the base frame 11, and a display screen 112 cooperating with the controller 111 can be arranged on the base frame 11 accordingly, so that the staff can understand the working status of the milling cutter 14 and each action mechanism of the rail bottom milling device in real time.

[0062] In addition, a plurality of lifting handles 113 are provided on the side walls of the base frame 11. After the milling of the weld nodules at the bottom of the rail at the current workstation is completed, the staff can lift the rail bottom milling device as a whole by holding the lifting handles 113 and carry it to the next workstation, thereby further improving the portability of the rail bottom milling device, making its operation more convenient and efficient, and further improving its adaptability to working conditions.

[0063] According to the needs of actual working conditions, multiple lifting handles 113 can be arranged on each side wall of the base frame 11 to meet the lifting and carrying needs of workers in different positions. The specific structure and shape of the lifting handles 113 can be flexibly selected and adjusted according to the needs of actual working conditions. In principle, as long as it can meet the actual application needs of the rail bottom milling device, it can be used.

[0064] In summary, the rail bottom milling device provided in the utility model, during its operation and use, if it is necessary to remove the weld nodule at the bottom of the rail, the rail bottom milling device can be placed as a whole under the processed rail, and the base frame is located at the corresponding position below the weld where the weld nodule at the bottom of the processed rail is located, and then the processed steel beam is reliably clamped by the clamping and positioning assembly, so as to ensure that the rail bottom milling device and the processed rail are fixed to each other. After being fixed in place, the feed frame is moved as a whole to the vicinity of the weld nodule at the bottom of the rail to be processed by the feed drive assembly, and the workbench is driven to be appropriately lifted and lowered in the vertical direction by the lifting drive assembly, so as to drive the working surface of the milling cutter located on the workbench to reach the adaption position with the bottom end face of the main structure of the rail, so that the working surface of the milling cutter can move along the bottom end face of the main structure of the rail. After being adjusted in place, the milling cutter is located at a position near the weld nodule at the bottom of the rail, and the rotation axis of the milling cutter is aligned with the weld corresponding to the weld nodule to be processed, and then the milling drive motor can be started to drive the milling cutter to start rotating. When the milling cutter is running, the feed drive assembly is controlled to drive the feed frame to move at a constant speed in the direction of the weld nodule at an appropriate speed. During this process, the milling cutter moves synchronously with the feed frame to complete the milling feed, thereby gradually milling and cleaning the weld nodule at the bottom of the processed rail until the original position of the weld nodule becomes a plane flush with the bottom end surface of the rail main structure, thereby completing a single weld nodule milling operation. After that, the feed frame and the workbench can be reset, and the clamping and positioning assembly can be loosened to release the locking and fixing state between the rail bottom milling device and the processed rail, and then the rail bottom milling device can be moved as a whole to the corresponding position under the next rail where the bottom weld nodule needs to be cleaned, and the above operation process is repeated to complete the milling operation of the next weld nodule. The above operation process is repeated until the milling of the weld nodule at the bottom of the rail under the current working condition is completed. The rail bottom milling device relies on clamping and fixing with the rail, combined with the horizontal movement and vertical lifting of supporting bearing mechanisms such as the feed frame and the workbench, to achieve coordinated adjustment and control of the milling cutter operating position and feeding state, fully ensuring the milling processing effect of the bottom weld nodule of the processed rail, and during the operation, there is no need for workers to manually hold the milling cutter or other direct milling operation tools, and the milling cutter feeding process and position adjustment completely rely on the mechanical transmission of each driving component, effectively improving the operating accuracy and efficiency of the milling cutter, so that the milling processing consistency of multiple bottom weld nodules of the rail is higher, and the bottom weld nodule processing effect of the rail is correspondingly optimized.

[0065] The rail bottom milling device provided by the utility model is introduced in detail above. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A rail bottom milling device, characterized in that: It comprises a horizontally arranged base frame, the top of which is provided with a clamping and positioning assembly capable of clamping the rail along the width direction of the rail; The top of the base frame is provided with a feed frame arranged in the horizontal direction and a feed drive assembly capable of driving the feed frame to reciprocate along the width direction of the rail, and the top of the feed frame is provided with a workbench arranged in the horizontal direction and a lifting drive assembly capable of driving the workbench to reciprocate and lift in the vertical direction; A milling cutter matched with the bottom of the rail is arranged on the top of the workbench, and a milling drive motor capable of driving the milling cutter to rotate is also arranged on the workbench.

2. The rail bottom milling device according to claim 1, characterized in that: It also includes a controller and a first distance measuring module and a second distance measuring module communicatively connected to the controller. The first distance measuring module is adapted to the milling cutter to detect the vertical distance between the weld bump at the bottom of the rail and the milling cutter, and the second distance measuring module is adapted to the milling cutter to detect the vertical distance between the weld on the bottom surface of the rail and the milling cutter.

3. The rail bottom milling device according to claim 2, characterized in that: The lifting drive assembly includes a lifting motor arranged on the workbench, the lifting motor is communicatively connected with the controller, and a lifting screw arranged in a vertical direction is connected between the output shaft of the lifting motor and the feed frame.

4. The rail bottom milling device according to claim 2, characterized in that: A tool seat is arranged on the top of the workbench, and the milling cutter is rotatably arranged on the tool seat through a vertically arranged tool shaft, the first distance measuring module is located at the top of the tool shaft, the second distance measuring module is arranged on the top of the tool seat, and the second distance measuring module is located on one side of the milling cutter.

5. The rail bottom milling device according to claim 4, characterized in that: The first distance measuring module and the second distance measuring module are both laser distance measuring modules.

6. The rail bottom milling device according to claim 1, characterized in that: The clamping and positioning assembly comprises a clamping guide rail fixedly connected to the base frame and extending in the width direction of the rail, a fixed clamping seat is fixedly arranged on the top of one end of the clamping guide rail, a movable clamping seat protruding from the top of the clamping guide rail is slidably arranged on the clamping guide rail, and a clearance between the fixed clamping seat and the movable clamping seat is matched in the horizontal direction to form a clamping cavity for the rail to be embedded; The clamping and positioning assembly also includes a rocker, a clamping screw is connected between the rocker and the movable clamping seat, and the rocker drives the movable clamping seat to reciprocate along the width direction of the rail through the clamping screw.

7. The rail bottom milling device according to claim 6, characterized in that: A fixed clamping platform is protruded on the outer wall of one side of the fixed clamping seat facing the movable clamping seat, and the bottom surface of the fixed clamping platform is matched with the top surface of the clamping guide rail to form a fixed clamping groove for the side rail bottom support plate of the steel rail to be embedded and clamped; A movable clamping platform is protruded on the outer wall of one side of the movable clamping seat toward the fixed clamping seat, and the bottom surface of the movable clamping platform is gap-matched with the top surface of the clamping guide rail to form a movable clamping groove for the other side rail bottom support plate of the steel rail to be embedded and clamped; The fixed clamping slot and the movable clamping slot are both communicated with the clamping cavity.

8. The rail bottom milling device according to claim 6, characterized in that: There are two clamping and positioning assemblies, and the two clamping and positioning assemblies are symmetrically arranged on two sides of the base frame along the length direction of the rail.

9. The rail bottom milling device according to claim 1, characterized in that: The feed drive assembly includes a handwheel arranged on the side wall of the base frame and a feed screw transmission-connected between the handwheel and the feed frame. The handwheel drives the feed frame to reciprocate along the width direction of the rail through the feed screw.

10. The rail bottom milling device according to claim 1, characterized in that: A plurality of lifting handles are arranged on the side walls of the base frame.

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