Mobile non-falling wheel lathe self-adaptive detection positioning system

Abstract

The application discloses a mobile non-falling wheel lathe self-adapting detection positioning system, and solves the problems of complex process operation, inaccurate positioning and low efficiency of a traditional mobile non-falling wheel lathe when positioning the wheels of a vehicle / train to be detected by relying on manual operation. The mobile non-falling wheel lathe comprises a rack, a numerical control system, a tool, a walking device and a lifting device on the rack. The self-adapting detection positioning system comprises a 2D / 3D line laser measuring instrument for measuring the axle position of the vehicle to be detected. The numerical control system is configured to control the mobile non-falling wheel lathe to move in the vertical direction and the length direction of the vehicle to be detected by the walking device and the lifting device respectively based on the axle position detected by the 2D / 3D line laser measuring instrument, and position the tool to a position capable of performing turning processing on the tread and the rim of a single damaged or scratched wheel of the vehicle to be detected.

Description

Technical Field

[0001] This invention belongs to the field of high-end CNC machine tools, and more specifically, relates to a mobile non-wheel lathe with an adaptive detection and positioning system based on the parking position of a vehicle / train. Background Technology

[0002] The CNC wheel-turning lathe used for inspecting train wheelsets needs to be installed in a wheel-turning depot. The train travels above the machine tool for centering and wheelset machining. Wheel-turning depots occupy a large area and require the laying of dedicated tracks, making them suitable only for depots with a large number of vehicles in railways and urban rail transit, and not for lines with few vehicles and short track lengths.

[0003] Mobile wheel-mounted lathes (abbreviated as: lathes / machine tools / wheel-mounted machines) can automatically travel within the depot to the wheelset of the vehicle to be repaired, and can also be transported to other lines by vehicle. They are highly adaptable and easy to store. Mobile wheel-mounted lathes perform wheel-mounting repairs on tracks equipped with a jacking machine that can lift the entire train set. The lathe can perform turning and machining on the tread and flange of individual damaged or scratched wheels without detaching the train or disassembling the wheelsets.

[0004] Traditional mobile lathes without wheels need to be driven under the vehicle. This requires manual control of the lathe to move in jogs and position the lathe at the center of the wheelset of the vehicle to be repaired. However, this process is complicated and often results in inaccurate positioning, requiring repeated repositioning, which seriously affects the efficiency of the lathe. Summary of the Invention

[0005] This invention provides an adaptive detection and positioning system for a mobile wheel-mounted lathe, which achieves efficient, automatic, and accurate positioning of the mobile wheel-mounted lathe with vehicle / train wheelsets. It solves the problems of complex operation, inaccurate positioning, and low efficiency of traditional mobile wheel-mounted lathes that rely on manual positioning of the wheels of the vehicle / train to be inspected.

[0006] According to one aspect of the embodiments, an adaptive detection and positioning system for a mobile wheel lathe is proposed. The mobile wheel lathe includes: a frame and a CNC system, a cutting tool, a traveling device, and a lifting device. The adaptive detection and positioning system includes: a 2D / 3D line laser measuring instrument for measuring the axle position of a vehicle to be inspected. The CNC system is configured to: based on the axle position detected by the 2D / 3D line laser measuring instrument, control the mobile wheel lathe to move in the vertical direction and the length direction of the vehicle to be inspected through the traveling device and the lifting device, respectively, and position the cutting tool to a position where it can turn the tread and rim of a single damaged or scratched wheel of the vehicle to be inspected.

[0007] In some examples, the frame has a base for mounting the 2D / 3D line laser measuring instrument and the cutting tool.

[0008] In some examples, the base has a wheelset positioning device for positioning the wheels.

[0009] In some examples, the portion of the wheelset positioning device that contacts the wheel is an arc-shaped surface.

[0010] In some examples, the two wheelset positioning devices are tangential to the wheels to achieve wheel positioning.

[0011] In some examples, the walking device includes wheels and a walking servo motor that drives the wheels to rotate.

[0012] In some examples, the lifting device is configured to lift the frame.

[0013] In some examples, the lifting device includes: a track positioning element supported on the ground or on the travel track of the mobile non-dropping wheel lathe when lifting the frame; a lead screw vertically arranged on the frame with a nut connected to the track positioning element; and a lifting servo motor disposed on the frame to drive the lead screw to move and lift the frame.

[0014] In some examples, the lifting servo motor is connected to the lead screw via a worm gear reducer that increases its output torque.

[0015] In some examples, the CNC system calculates the deviation between the wheel axle center and the spindle center of the mobile non-dismounting wheel lathe based on the wheel axle position detected by the 2D / 3D line laser measuring instrument, and uses this deviation as the distance the mobile non-dismounting wheel lathe travels along the length direction of the vehicle to be tested. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a mobile, wheel-free lathe according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of a mobile, wheel-free lathe frame according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of a mobile non-drop wheel lathe lifting device according to an embodiment of the present invention. Detailed Implementation

[0019] like Figure 1 , Figure 2 and Figure 3As shown, the mobile wheel-mounted lathe includes a frame 1, a 2D / 3D line laser measuring instrument 2, and a CNC system. The frame 1 is the framework of the mobile wheel-mounted lathe, which has a base 3, a traveling device 4, and a lifting device 5. The 2D / 3D line laser measuring instrument 2 is configured to measure the position of the wheel axles of the vehicle / train to be inspected. Based on the wheel axle position detected by the 2D / 3D line laser measuring instrument, the CNC system controls the lathe to move in the horizontal (x-direction) and vertical (z-direction) directions via the traveling device and the lifting device, positioning the cutting tool to a position capable of turning the tread and flange of a single damaged or scratched wheel 6 without repeated manual adjustments to the lathe's position.

[0020] A 2D / 3D line laser measuring instrument 2, a wheelset alignment device 7, and a cutting tool are mounted on the base 3. The 2D / 3D line laser measuring instrument 2 is configured to measure the axles of the vehicle / train to be inspected. As the name suggests, the wheelset alignment device 7 positions the wheels 6 on the vehicle's axle. Specifically, the wheelset alignment device 7 must be in contact with the wheel 6 to complete the positioning. A curved surface is preferred for the contact surface between the wheelset alignment device 7 and the wheelset 6. For example, the wheelset alignment device 7 can have a circular structure. Generally, two wheelset alignment devices 7 are used to position one wheel 6, with both devices tangent to the wheel 6, accurately locating the center of the wheel 6. After positioning, the cutting tool performs turning on the tread and rim of the damaged or scratched wheel 6. The cutting tool is not shown in the figure because it is a conventional technique in the art.

[0021] The traveling device 4 includes wheels 8 and a traveling servo motor 9. The traveling servo motor 9 drives the wheels 8 to rotate, thereby moving the lathe in the x-direction. Generally, a track is laid on the ground, and the lathe travels on the track to inspect the wheels of the vehicle above.

[0022] The lifting device 5 is used to lift the frame 1, even if the frame 1 moves in the z-direction. The lifting device includes a track positioning component 10, a lead screw 11, a worm gear reducer 12, and a lifting servo motor 13. The track positioning component 10 is used to support the frame 1 on a track or the ground during the lifting process. The lead screw 11 is vertically arranged on the frame 1, and its nut is connected to the track positioning component 10. When the lifting servo motor 13 moves, the torque is increased through the worm gear reducer 12, driving the lead screw 11 below to move, causing the track positioning component 10 to extend and support the track or the ground, thus lifting the frame 1.

[0023] During operation, a mobile, wheel-free lathe moves in from under the vehicle. A 2D / 3D line laser measuring instrument on the lathe emits laser lines to measure the vehicle's wheel axles. The lathe's CNC system collects the measurement data from the 2D / 3D line laser measuring instrument and performs calculations such as filtering, fitting, integration, and fast Fourier transform to fit the center point position of the wheel axle. Then, it calculates the positional deviation between the vehicle's wheel axle center point and the lathe's spindle center point, i.e., the distance the lathe needs to travel. The CNC system feeds back the travel distance to the traveling mechanism, whose servo motor drives the lathe to move, bringing the cutting tool on the lathe horizontally closer to the wheelset on the vehicle's wheel axle until the center point of the lathe's spindle coincides with the center point of the vehicle's wheel axle vertically. The lifting servo motor then moves, lifting the lathe frame via a worm gear reducer and lead screw, bringing the cutting tool vertically closer to the wheelset on the vehicle's wheel axle until the wheelset positioning device contacts the train wheel, thus achieving precise positioning of the lathe and wheelset.

Claims

1. A mobile self-adaptive detection and positioning system for a live wheel lathe, characterized in that, The invention includes a mobile, wheeled lathe, which comprises: a frame and a CNC system thereon, a 2D / 3D line laser measuring instrument, cutting tools, a traveling device, and a lifting device; The 2D / 3D line laser measuring instrument is configured to measure the position of the wheel axles of the vehicle to be inspected; The CNC system is configured to: based on the position of the wheel axle detected by the 2D / 3D line laser measuring instrument, control the movement of the mobile wheel lathe in the vertical direction and the length direction of the vehicle to be inspected through the traveling device and the lifting device, respectively, to position the cutting tool at a position where it can perform turning machining on the tread and rim of a single damaged or scratched wheel of the vehicle to be inspected; based on the position of the wheel axle detected by the 2D / 3D line laser measuring instrument, calculate the deviation between the center of the wheel axle and the spindle center of the mobile wheel lathe, and use this deviation as the distance the mobile wheel lathe travels along the length direction of the vehicle to be inspected; The lifting device is configured to lift the frame; the lifting device includes: a track positioning component supported on the ground or the travel track of the mobile non-drop wheel lathe when lifting the frame; a lead screw arranged vertically on the frame, the nut of which is connected to the track positioning component; And a lifting servo motor mounted on the frame to drive the lead screw to move and lift the frame.

2. The adaptive detection and positioning system for a mobile, wheel-less lathe according to claim 1, characterized in that, The frame has a base for mounting the 2D / 3D line laser measuring instrument and the cutting tool.

3. The adaptive detection and positioning system for a mobile, wheel-less lathe according to claim 2, characterized in that, The base has a wheelset positioning device for positioning the wheels.

4. The adaptive detection and positioning system for a mobile, wheel-less lathe according to claim 3, characterized in that, The part of the wheelset positioning device that contacts the wheel is an arc-shaped surface.

5. The adaptive detection and positioning system for a mobile, wheel-less lathe according to claim 4, characterized in that, The two wheelset positioning devices are tangent to the wheels to achieve wheel positioning.

6. The adaptive detection and positioning system for a mobile, wheel-less lathe according to claim 1, characterized in that, The walking device includes wheels and a walking servo motor that drives the wheels to rotate.

7. The adaptive detection and positioning system for a mobile, wheel-less lathe according to claim 1, characterized in that, The lifting servo motor is connected to the lead screw via a worm gear reducer that increases its output torque.

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