Rail-changing high-low joint milling device

Abstract

The utility model provides a milling device for a rail-changing high-low joint, which belongs to the technical field of railway engineering machinery and comprises a main frame, an inclination adjusting mechanism, a milling mechanism, a control mechanism, a milling mechanism and a milling mechanism, wherein the inclination adjusting mechanism is arranged on the main frame and is used for adjusting the inclination of the main frame to carry out downslope milling operation; the rail clamping mechanism is used for clamping and positioning the steel rail so as to mill; the machining unit is used for milling the joint of the steel rail; and the guide unit is used for guiding the machining unit to move along the downslope track so as to carry out downslope milling. A cutter forming face of the machining unit is matched with a steel rail working face, a rail top and a steel rail non-working face. The utility model effectively solves the problems of high labor intensity and poor precision of on-site new and old rail height difference down slope grinding, can realize down slope transition milling operation in a sufficient range, meets the requirement that the high gradient is less than 0.1%, and has the advantages of high joint processing efficiency, good quality and the like.

Description

Technical Field

[0001] This utility model belongs to the field of railway engineering machinery technology, specifically relating to a milling device for high and low joints of rail changing. Background Technology

[0002] In the field of high-speed railway line maintenance, according to railway line maintenance rules, rails should be replaced when the vertical wear of the main rail exceeds 6mm, and the welded joint between the old and new rails should be sloped. Currently, the slope treatment at the joint between the old and new rails mainly relies on manual labor using small grinding devices. This results in high labor intensity and low work efficiency for operators. Furthermore, the slope is determined by experience and visual inspection, which has poor accuracy and is highly subjective, making it difficult to guarantee quality. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings of the prior art and provide a milling device for high and low joints of rail replacement, which has high joint processing efficiency and good quality, and effectively realizes the goal of reducing manpower and labor, improving quality and efficiency in the on-site grinding of high and low joints of new and old rails.

[0004] The technical solution of this utility model is as follows: A milling device for changing rail high and low joints, comprising a main frame and a device mounted on the main frame:

[0005] Incline adjustment mechanism for adjusting the tilt of the main frame to perform downhill milling operations;

[0006] Rail clamping mechanism for holding and positioning steel rails for milling;

[0007] A machining unit used for milling rail joints;

[0008] A guide unit used to guide the machining unit to move along the slope trajectory for slope milling.

[0009] The tilt adjustment mechanism includes multiple adjustable outrigger mechanisms located at the bottom of the main frame; the adjustable outrigger mechanism includes hydraulic outriggers and servo valves for controlling the raising and lowering of the hydraulic outriggers.

[0010] The guiding unit includes one or more guide rails mounted on the main frame, a sliding sleeve slidably connected to each guide rail, a processing unit mounting base connected to the sliding sleeve for mounting the processing unit, and a gear slide rail for cooperating with the processing unit; the gear slide rail includes a rack mounted on the main frame and a gear meshing with the rack for transmission.

[0011] The processing unit mounting base is connected to the sliding sleeve via the sliding sleeve mounting base.

[0012] The machining unit includes a guide drive element mounted on the machining unit mounting base for driving the gear to rotate so that the gear reciprocates along the rack, a cutting tool for milling the rail, a cutting tool drive element for driving the cutting tool to rotate, and a vertical feed drive element for driving the cutting tool to move vertically up and down.

[0013] The cutting tool is a contour cutting tool, and the forming surface of the cutting tool is adapted to the working surface of the rail, the top of the rail, and the non-working surface of the rail.

[0014] The cutting tool has inserts embedded in its contoured surface.

[0015] The cutting tool is a concave arc milling cutter, and the forming surface of the milling cutter is adapted to the working surface of the rail, the top of the rail, and the non-working surface of the rail.

[0016] The guide drive element, tool drive element, and vertical feed drive element are servo motors, servo hydraulic motors, or other power sources.

[0017] The tool drive element is connected to the machining unit mounting base via a vertical feed drive element.

[0018] The rail clamping mechanism includes a fixed rail clamping block and a movable rail clamping block that cooperate to clamp and position the rail.

[0019] The clamping surfaces of the fixed rail clamp and the movable rail clamp are adapted to the rail.

[0020] The movable rail clamping block is connected to the main frame via a servo hydraulic cylinder, a servo actuator used to clamp / release the rail.

[0021] It also includes a control system for milling the rails along the slope based on the height difference between the new and old rails, including an inclination adjustment mechanism, a guide unit, and a processing unit.

[0022] The main frame is 3m or longer; the main frame is a double-layer frame structure, each layer of the frame includes two longitudinal side beams and one or more transverse side beams; the upper frame also includes one or more central transverse beams connecting the two longitudinal side beams; multiple longitudinal beams for connecting the upper and lower frames are provided between the opposing longitudinal side beams on the upper and lower frames.

[0023] The beneficial effects of this utility model are as follows: The high and low joint milling device for rail replacement provided by this utility model is simple and easy to operate, with low requirements for operators. Before or after welding new and old rails, the device can perform milling operations with a sufficient range of slope transition by using a contour cutter that can process the working surface, rail top and non-working surface of the rail, in conjunction with the main frame. It can meet the requirement of high slope <1‰. It has the advantages of high precision, high work efficiency, good dynamic slope ability, high level of automation, and dust-free working environment by replacing grinding with milling. Compared with the existing manual grinding, it is more efficient, has better work quality and lower labor intensity. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram (top view) of the operation of this utility model;

[0026] Figure 3 This is a schematic diagram of the operation of this utility model (front view);

[0027] Figure 4 This is a schematic diagram of the main frame structure of this utility model;

[0028] Figure 5 for Figure 4 BB section view;

[0029] Figure 6 This is a schematic diagram of the processing unit structure of this utility model;

[0030] Figure 7 This is a schematic diagram of the guide unit structure of this utility model;

[0031] Figure 8 This is a schematic diagram of the high and low rail operation of this utility model;

[0032] Figure 9 This is the second schematic diagram of the high and low rail operation of this utility model;

[0033] Figure 10 This is a schematic diagram of the rail profile.

[0034] Reference numerals: 1-Main frame; 2-Machining unit; 3-Guide unit; 4-Rail clamping mechanism; 5-Inclination adjustment mechanism; 6-Rack; 7-Cutting tool; 8-Guide drive element; 9-Ear plate; 10-Machining unit mounting base; 11-Hydraulic support leg; 12-Vertical feed drive element; 13-Longitudinal side beam; 131-Longitudinal beam; 14-Transverse side beam; 15-Fixed rail clamping block; 16-Modible rail clamping block; 17-Central crossbeam; 18-Servo hydraulic cylinder; 19-Sliding sleeve; 20-Sliding sleeve mounting base; 21-Guide rail; 22-Gear; 23-Cutting tool drive element; 24-Hydraulic support leg; 25-High rail; 26-Low rail; 27-Rail; 701-Cutting tool; 901-Rail top; 902-Rail working surface; 903-Rail non-working surface. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0036] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0037] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0038] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0039] Part 1: Structural Composition.

[0040] like Figures 1-9 As shown, the high and low joint milling device for changing rails provided by this utility model mainly includes a main frame 1, a processing unit 2, a guide unit 3, a rail clamping mechanism 4, and an inclination adjustment mechanism 5.

[0041] The main frame 1 is over 3m in length; it consists of a transverse side beam 14, a longitudinal side beam 13, and a central cross beam 17 forming the installation frame.

[0042] The main frame 1 is a double-layer frame structure. Each layer of the frame includes two longitudinal side beams 13 and one or more transverse side beams 14. The upper frame also includes one or more central transverse beams 17 connecting the two longitudinal side beams 13. Multiple longitudinal beams 131 for connecting the upper and lower frames are provided between the opposing longitudinal side beams 13 on the upper and lower frames.

[0043] The rail clamping mechanism 4 for clamping and positioning the rail for milling includes a fixed rail clamping block 15 and a movable rail clamping block 16 that cooperate to clamp and position the rail; the clamping surfaces of the fixed rail clamping block 15 and the movable rail clamping block 16 are adapted to the rail. The movable rail clamping block 16 is connected to the main frame 1 via a servo hydraulic cylinder 18, a servo actuator for clamping / releasing the rail.

[0044] The fixed rail clamping block 15 and the movable rail clamping block 16 of the rail clamping mechanism 4 are fixed to the bottom of the main frame 1 and three sets are installed respectively. The servo hydraulic cylinder 18 that controls the rail clamping mechanism 4 is installed on the side of the transverse side beam 13.

[0045] The slope adjustment mechanism 5, used to adjust the tilt of the main frame 1 for downhill milling operations, includes multiple adjustable outrigger mechanisms located at the lower part of the main frame 1. Each adjustable outrigger mechanism includes hydraulic outriggers 24 and servo valves for controlling the raising and lowering of the hydraulic outriggers. The hydraulic outriggers 24 of the slope adjustment mechanism 5 are distributed at the four corners of the main frame 1 and are equipped with servo valves for controlling the raising and lowering of the hydraulic outriggers.

[0046] The guide unit 3, used to drive the processing unit 2 along the slope trajectory, consists of guide rails 21, sliding sleeves 19, sliding sleeve mounting seats 20, processing unit mounting seats 10, racks 6, and gears 22. Two guide rails 21 are mounted on the main frame 1, and sliding sleeves 19 are slidably connected to each guide rail 21. The sliding sleeves 19 are connected to the sliding sleeve mounting seats 20, and the processing unit mounting seats 10 are connected to the sliding sleeves 19 via the sliding sleeve mounting seats 20. The processing unit mounting seats 10 cooperate with the processing unit 2. The guide drive element 8 meshes with the rack 6 and gears 22 to drive the entire processing unit.

[0047] The machining unit 2 for milling rail joints consists of a guide drive element 8 mounted on the machining unit mounting base 10, which drives the gear 22 to rotate so that the gear 22 reciprocates along the rack 6; a cutting tool 7 for milling the rail; a tool drive element 23 for driving the cutting tool 7 to rotate; and a vertical feed drive element 12 for driving the cutting tool 7 to move vertically up and down. The vertical feed drive element 12 controls the feed rate of the cutting tool 7, and the tool drive element 23 controls the rotational speed of the cutting tool 7 and can adjust the speed according to the feed rate of the cutting tool 7.

[0048] The cutting tool 7 can be a concave arc end mill or an inlaid insert end mill. The forming surface of the end mill is aligned with the working surface 901 of the rail, the rail top 901, and the non-working surface 903 of the rail. Figure 10 (As shown) Adaptation.

[0049] It also includes a control system that controls the slope adjustment mechanism 5, guide unit 3, and processing unit 2 to perform slope milling on the rails based on the height difference between the new and old rails. The control system calculates the slope distance and inclination based on the height difference between the new and old rails collected by the external rail profile detection system, and controls the slope adjustment mechanism 5, guide unit 3, and processing unit 2 to perform slope milling on the rails accordingly.

[0050] Part Two: Working Principle and Explanation

[0051] First, the parameters and working mode of the high and low joint milling device for changing rails will be explained, taking this utility model as an example:

[0052] Parameters: The design standard for the inclined transition section is 1:1000, that is, a 1mm height difference results in a 1000mm slope length.

[0053] The working principle is as follows: When there is a weld height difference between the high rail 25 and the low rail 26, the rail profile is scanned by an external rail profile detection system. The control system calculates the slope distance and inclination based on the height difference between the new and old rails collected by the external rail profile detection system. For example, if the height difference is 3mm in actual operation, the slope distance is set to 3000mm. Based on this, the inclination adjustment mechanism 5, the guide unit 3, and the processing unit 2 are controlled to perform slope milling on the rail. The servo hydraulic cylinder 18 controls the clamping force, the hydraulic support leg 24 adjusts the levelness, the vertical feed drive element 12 adjusts the vertical feed amount, and the speed of the cutter 7 is adjusted to achieve slope action control. The speed control amount can be adjusted according to the single milling amount of the cutter 7, which can avoid the breakage of the insert milling cutter insert 701.

[0054] An optical detection device for detecting the joint position can be installed at the machining unit. The joint position is detected by the height difference between the high rail 25 and the low rail 26. The control system transmits the signal to the machining unit, which moves along the guide rail 21 for tool positioning. The tool 7 is milled instead of ground, realizing a one-time milling operation of the entire cross-section of the rail weld.

[0055] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] This utility model is not limited to the above-described embodiments. For those skilled in the art, various improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model. Contents not described in detail in this specification are prior art known to those skilled in the art.

Claims

1. A milling device for changing the height of a rail joint, characterized in that: Includes the mainframe (1) and the components mounted on the mainframe (1): Incline adjustment mechanism (5) for adjusting the tilt of the main frame (1) to perform downhill milling operations; (4) Rail clamping mechanism for holding and positioning rails for milling. (2) A machining unit used for milling rail joints; Guide unit (3) for guiding the movement of machining unit (2) to perform downhill milling.

2. The track-changing high / low joint milling device according to claim 1, characterized in that: The tilt adjustment mechanism (5) includes multiple adjustable outrigger mechanisms located at the lower part of the main frame (1); the adjustable outrigger mechanism includes hydraulic outriggers (24) and servo valves for controlling the raising and lowering of the hydraulic outriggers.

3. The track-changing high / low joint milling device according to claim 1, characterized in that: The guide unit (3) includes one or more guide rails (21) set on the main frame (1), a sliding sleeve (19) slidably connected to each guide rail (21), a processing unit mounting seat (10) connected to the sliding sleeve (19) for installing the processing unit (2), and a gear slide rail for cooperating with the processing unit (2); the gear slide rail includes a rack (6) mounted on the main frame (1) and a gear (22) meshing with the rack (6).

4. The track-changing high / low joint milling device according to claim 3, characterized in that: The processing unit mounting base (10) is connected to the sliding sleeve (19) via the sliding sleeve mounting base (20).

5. The track-changing high / low joint milling device according to claim 1, characterized in that: The processing unit (2) includes a guide drive element (8) mounted on the processing unit mounting base (10) for driving the gear (22) to rotate so that the gear (22) reciprocates along the rack (6), a cutting tool (7) for milling the rail, a cutting tool drive element (23) for driving the cutting tool (7) to rotate, and a vertical feed drive element (12) for driving the cutting tool (7) to move vertically up and down; the forming surface of the cutting tool is adapted to the working surface of the rail, the top of the rail and the non-working surface of the rail.

6. The track-changing high / low joint milling device according to claim 5, characterized in that: The guide drive element (8), the tool drive element (23), and the vertical feed drive element (12) are servo motors or servo hydraulic motors.

7. The track-changing high / low joint milling device according to claim 5, characterized in that: The tool drive element (23) is connected to the machining unit mounting base (10) via the vertical feed drive element (12).

8. The high / low joint milling device for track changing according to claim 5, characterized in that: The rail clamping mechanism (4) includes a fixed rail clamping block (15) and a movable rail clamping block (16) that cooperate to clamp and position the rail. The clamping surfaces of the fixed rail clamp (15) and the movable rail clamp (16) are adapted to the rail. The movable rail clamping block (16) is connected to the main frame (1) via a servo hydraulic cylinder (18), a servo actuator used to drive the movable rail clamping block (16) to clamp / release the rail.

9. The track-changing high / low joint milling device according to claim 1, characterized in that: It also includes a control system for milling the rails along the slope based on the height difference between the new and old rails, a slope adjustment mechanism (5), a guide unit (3), and a processing unit (2).

10. The track-changing high / low joint milling device according to claim 1, characterized in that: The main frame (1) is more than 3m long; the main frame (1) is a double-layer frame structure, each layer of the frame includes two longitudinal side beams (13) and one or more transverse side beams (14); the upper frame also includes one or more central transverse beams (17) connecting the two longitudinal side beams (13); multiple longitudinal beams (131) for connecting the upper and lower frames are provided between the opposing longitudinal side beams (13) on the upper and lower frames.

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