Mobile underfloor wheel lathe self-adaptive detection positioning system

Abstract

The invention discloses a self-adaptive detecting and positioning system for a mobile underfloor wheel lathe, and solves the problems of complex process operation, inaccurate positioning and low efficiency when a traditional mobile underfloor wheel lathe is manually positioned with wheels of a vehicle / train to be detected. The mobile underfloor wheel lathe comprises a rack, a numerical control system, a cutter, a walking device and a lifting device, the numerical control system, the cutter, the walking device and the lifting device are arranged on the rack, the self-adaptive detection positioning system comprises a 2D / 3D line laser measuring instrument for measuring the position of a wheel axle of a to-be-detected vehicle, and the numerical control system is configured to detect the position of the wheel axle based on the position of the wheel axle detected by the 2D / 3D line laser measuring instrument. Through the walking device and the lifting device, the movable non-pulling wheel lathe is controlled to move in the vertical direction and the length direction of a to-be-detected vehicle, and the cutter is positioned to the position where turning machining can be conducted on a tread and a rim of a single damaged or scratched wheel of the to-be-detected vehicle.

Description

Technical Field

[0001] The present invention belongs to the field of high-end CNC machine tools, and more specifically, relates to a mobile underfloor wheeled lathe adaptively detecting and positioning system according to a vehicle / train parking position. Background Art

[0002] The CNC wheel lathe for inspecting train wheelsets needs to be installed in the wheel turning warehouse, and the train drives over the machine tool for centering and wheelset processing. The wheel turning warehouse occupies a large area and requires the laying of special tracks. It is only suitable for railway and urban rail transit depots with a large number of vehicles, but not for lines with few vehicles and short lines.

[0003] The mobile wheel-free lathe (abbreviated as: lathe / machine tool / wheel-free) can automatically drive to the wheel set to be repaired in the depot, and can also be transported to other lines by vehicles. It has high applicability and is easy to store. The mobile wheel-free lathe is used to turn and repair the wheel set of the vehicle on the track equipped with a vehicle-lifting machine that lifts the entire vehicle set. The lathe can turn and machine the tread and rim of a single damaged or scratched wheel without disassembling the train or removing the wheelset.

[0004] Traditional mobile wheelless lathes need to be driven under the vehicle, and manual control is required to jog the lathe and locate the center position of the lathe and the wheelset of the vehicle to be repaired. However, this process is complicated and often results in inaccurate positioning, which requires repeated re-positioning, seriously affecting the efficiency of the lathe. Summary of the invention

[0005] The present invention provides an adaptive detection and positioning system for a mobile underfloor wheelset lathe, which realizes efficient, automatic and accurate positioning of the mobile underfloor wheelset lathe and the wheel pair of a vehicle / train, and solves the problems of complex process operation, inaccurate positioning and low efficiency existing in the traditional mobile underfloor wheelset lathe when the wheel positioning with the vehicle / train to be detected is performed manually.

[0006] According to one aspect of the embodiment, an adaptive detection and positioning system for a mobile underfloor wheeled lathe is proposed, wherein the mobile underfloor wheeled lathe comprises: a frame and a numerical control system, a tool, a traveling device and a lifting device thereon, wherein the adaptive detection and positioning system comprises: a 2D / 3D line laser measuring instrument for measuring the wheel axle position of a vehicle to be inspected, wherein the numerical control system is configured to: based on the wheel axle position detected by the 2D / 3D line laser measuring instrument, control the mobile underfloor wheeled lathe to move in a vertical direction and a length direction of the vehicle to be inspected through the traveling device and the lifting device, respectively, and position the tool to a position capable of performing turning processing on 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 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 positioning of the wheels.

[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 rack.

[0013] In some examples, the lifting device includes: a track positioning member supported on the ground or the walking track of the mobile underfloor wheeled lathe when lifting the frame; a lead screw arranged vertically on the frame, whose nut is connected to the track positioning member; and a lifting servo motor arranged 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 screw through a worm gear reducer that increases its output torque.

[0015] In some examples, the CNC system calculates the deviation between the center of the wheel axle and the center of the spindle of the mobile wheeled lathe based on the wheel axle position detected by the 2D / 3D line laser measuring instrument, and uses the deviation as the distance traveled by the mobile wheeled lathe along the length direction of the vehicle to be inspected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a mobile underfloor wheeled lathe according to an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of a frame of a mobile underfloor wheeled lathe according to an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of a lifting device for a mobile underfloor wheels lathe according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] like Figure 1 , Figure 2 and Figure 3As shown, the mobile wheelless lathe comprises a frame 1, a 2D / 3D line laser measuring instrument 2, and a numerical control system. The frame 1 is the framework of the mobile wheelless lathe, on which there are 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 axle of the vehicle / train to be inspected. Based on the position of the wheel axle of the vehicle / train detected by the 2D / 3D line laser measuring instrument, the numerical control system controls the movement of the lathe in the horizontal direction (x direction) and the vertical direction (z direction) through the traveling device and the lifting device, and positions the tool to a position where the tread and rim of a single damaged or scratched wheel 6 can be turned without the need for manual repeated adjustment of the position of the lathe.

[0020] A 2D / 3D line laser measuring instrument 3, a wheelset positioning device 7 and a tool are installed on the base 3. The 2D / 3D line laser measuring instrument 2 is configured to measure the axle of the vehicle / train to be inspected. As the name implies, the wheelset positioning device 7 is used to position the wheel 6 on the vehicle axle. Specifically, the wheelset positioning device 7 must be in contact with the wheel 6 to complete the positioning. It is a better choice that the surface where the wheelset positioning device 7 contacts the wheelset 6 is an arc surface. For example, the wheelset positioning device 7 can adopt a circular structure. Generally, two wheelset positioning devices 7 are used to position one wheel 6. The two wheelset positioning devices 7 are tangent to the wheel 6 and can accurately locate the center of the wheel 6. After the positioning is completed, the tool performs boring processing on the tread and rim of the damaged or scratched wheel 6. The tool is not shown in the figure because it is a conventional technology in this field.

[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 driving the lathe to move in the x direction. Generally, a track is laid on the ground, and the lathe travels on the track to inspect and repair the wheels of the vehicle above.

[0022] The lifting device 5 is used to lift the frame 1, that is, the frame 1 moves in the z direction. The lifting device includes a track positioning member 10, a lead screw 11, a worm gear reducer 12 and a lifting servo motor 13. The track positioning member 10 is used to support the frame 1 on the track or the ground during the lifting process. The lead screw 11 is arranged vertically on the frame 1, and its nut is connected to the track positioning member 10. The lifting servo motor 13 moves, and the torque is increased by the worm gear reducer 12, which drives the lead screw 11 below to move, so that the track positioning member 10 extends and supports on the track or the ground, and the frame 1 is lifted.

[0023] During operation, the mobile wheelless lathe drives in from under the vehicle, and the 2D / 3D line laser measuring instrument on it emits laser lines to measure the vehicle wheel axle; the CNC system of the lathe collects the measurement data of the 2D / 3D line laser measuring instrument, and performs filtering, fitting, integration, fast Fourier transform and other operations to fit the center point position of the wheel axle; then the position deviation between the center point of the vehicle wheel axle and the center point of the lathe spindle is calculated, that is, the distance the lathe needs to travel; the CNC system feeds back the distance to be traveled to the walking device, and the servo motor of the walking device drives the lathe to travel, so that the blade on the lathe moves horizontally to the wheelset on the vehicle wheel axle until the center point of the lathe spindle coincides with the center point of the vehicle wheel axle in the vertical direction; the lifting servo motor moves, and the frame of the lathe is lifted through the worm gear reducer and the lead screw, so that the blade moves vertically to the wheelset on the vehicle wheel axle until the wheelset positioning device contacts the train wheel, thereby achieving precise positioning of the lathe and the wheelset.

Claims

1. An adaptive detection and positioning system for a mobile underfloor wheel lathe, the mobile underfloor wheel lathe comprising: a frame and a numerical control system, a tool, a walking device and a lifting device thereon, characterized in that: The adaptive detection and positioning system includes: a 2D / 3D line laser measuring instrument for measuring the wheel axle position of the vehicle to be inspected, and the numerical control system is configured to: based on the wheel axle position detected by the 2D / 3D line laser measuring instrument, control the movement of the mobile wheelless lathe in the vertical direction and the length direction of the vehicle to be inspected through the walking device and the lifting device, respectively, and position the tool to a position where the tread and rim of a single damaged or scratched wheel of the vehicle to be inspected can be turned.

2. The adaptive detection and positioning system for a mobile underfloor wheeled lathe according to claim 1 is characterized in that: The frame is provided with a base for mounting the 2D / 3D line laser measuring instrument and the tool.

3. The adaptive detection and positioning system for a mobile underfloor wheeled lathe according to claim 2 is characterized in that: The base is provided with a wheelset positioning device for positioning the wheels.

4. The adaptive detection and positioning system for a mobile underfloor wheeled lathe according to claim 3 is characterized in that: The portion of the wheelset positioning device in contact with the wheel is an arc-shaped surface.

5. The adaptive detection and positioning system for a mobile underfloor wheeled lathe according to claim 4 is characterized in that: The two wheelset positioning devices are tangent to the wheels to achieve positioning of the wheels.

6. The adaptive detection and positioning system for a mobile underfloor wheeled lathe according to claim 1, characterized in that: The walking device comprises wheels and a walking servo motor driving the wheels to rotate.

7. The adaptive detection and positioning system for a mobile underfloor wheeled lathe according to claim 1, characterized in that: The lifting device is configured to lift the frame.

8. The adaptive detection and positioning system for a mobile underfloor wheeled lathe according to claim 7, characterized in that: The lifting device comprises: a track positioning member supported on the ground or on the running track of the mobile underfloor wheel lathe when the frame is lifted; a lead screw vertically arranged on the frame, a nut of which is connected to the track positioning member; And a lifting servo motor is arranged on the frame to drive the lead screw to move and lift the frame.

9. The adaptive detection and positioning system for a mobile underfloor wheeled 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.

10. The adaptive detection and positioning system for a mobile underfloor wheeled lathe according to claim 1, characterized in that: The numerical control system calculates the deviation between the center of the wheel axle and the center of the main shaft of the mobile wheeled lathe based on the wheel axle position detected by the 2D / 3D line laser measuring instrument, and uses the deviation as the distance traveled by the mobile wheeled lathe along the length direction of the vehicle to be detected.

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