An on-line monitoring device for slippage of a mobile rail flash welding machine

Abstract

A mobile on-line monitoring device for rail flash welding machine slippage, comprising a mechanical monitoring device (1), a programmable logic controller (2), a welding control system (3) and an industrial computer (4), characterized in that the mechanical monitoring device (1) is connected to the programmable logic controller (2), and the programmable logic controller (2) is connected to the welding control system (3) and the industrial computer (4). The mobile on-line monitoring device for rail flash welding machine slippage provided by the present invention realizes automatic monitoring and intelligent control of slippage during the welding process through links such as preliminary mechanical contacts, on-line monitoring, closed-loop control, and automatic recording.

Description

Technical Field

[0001] The present invention relates to the technical field of rail flash welding, and in particular to an on-line monitoring device for slippage of a mobile rail flash welding machine. Background Art

[0002] During on-site rail mobile flash welding construction, especially when performing locked welding or welding extra-long rails, due to factors such as large tensile resistance or reduced clamping force of the welding machine, the phenomenon of slippage often occurs between the welded rail and the static frame or moving frame of the mobile flash welding machine, seriously affecting the stability of welding quality. Among various models of mobile rail flash welding machines currently in use, there is no special device and function for monitoring rail slippage. It is necessary to draw lines on the rail, and after welding is completed, the relative position change between the welding machine jaws and the lines is observed to determine whether slippage has occurred. Summary of the Invention

[0003] To overcome the existing defects, the present invention proposes an on-line monitoring device for slippage of a mobile rail flash welding machine.

[0004] An on-line monitoring device for slippage of a mobile rail flash welding machine includes a mechanical monitoring device, a programmable logic controller, a welding control system, and an industrial computer. The mechanical monitoring device is connected to the programmable logic controller, and the programmable logic controller is connected to the welding control system and the industrial computer.

[0005] Among them, there are two mechanical monitoring devices, including a moving frame monitoring device and a static frame monitoring device. The static frame monitoring device is installed outside the clamping jaws of the static frame of the mobile rail flash welding machine, and the moving frame monitoring device is installed outside the clamping jaws of the moving frame of the mobile rail flash welding machine.

[0006] Among them, the mechanical monitoring device includes a fixed seat, a micro-motion contact switch, a switch sliding plate, a connecting beam, a support electromagnet, a rail top contact head, a vertical slide rail, and a moving buffer. Among them, the rail top contact head is connected to the micro-motion contact switch and is arranged on the fixed seat; the support electromagnet is connected to the switch sliding plate through the connecting beam, the vertical slide rail and the moving buffer are arranged inside the switch sliding plate, and the switch sliding plate is arranged on one side of the micro-motion contact switch.

[0007] Among them, the mechanical monitoring device is connected to a sensor, and the sensor is connected to the programmable logic controller.

[0008] Optionally, the sensor is a contact or non-contact sensor.

[0009] During the process of clamping the rail before welding with a mobile rail flash welder, the rail top contact head of the mechanical monitoring device contacts the rail to be welded under the action of the supporting electromagnet and forms a certain pressure; during the welding process, if there is a relative displacement between the rail and the moving frame clamp or the static frame clamp of the mobile rail flash welder, the rail top contact head will be driven to displace under the action of friction, triggering a contact or non-contact sensor, and sending the slipping signal to the programmable logic controller and the computer. The programmable logic controller judges whether slipping occurs during the rail welding process according to the operating state of the mobile welder and issues corresponding control instructions.

[0010] The programmable logic controller is connected to an industrial computer and software, continuously reads the data in the programmable logic controller, checks whether the mobile rail flash welder slips, and displays relevant information on the software interface.

[0011] The present invention provides an on-line slip monitoring device for a mobile rail flash welder, which realizes the automatic monitoring and intelligent control of the slipping phenomenon during the welding process through links such as preliminary mechanical contacts, on-line monitoring, closed-loop control, and automatic recording. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of an on-line slip monitoring device for a mobile rail flash welder.

[0013] Figure 2 It is a working flow chart of an on-line slip monitoring device for a mobile rail flash welder.

[0014] Figure 3 It is a schematic structural diagram of the mechanical monitoring device.

[0015] Figure 4 It is a schematic diagram during the operation of the mechanical monitoring device. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following will describe in detail an on-line slip monitoring device for a mobile rail flash welder provided by the present invention in conjunction with the drawings and specific embodiments.

[0017] Figures 1-3 As shown, an on-line slip monitoring device for a mobile rail flash welder includes a mechanical monitoring device 1, a programmable logic controller 2, a welding control system 3, and an industrial computer 4. The mechanical monitoring device 1 is connected to the programmable logic controller 2, and the programmable logic controller 2 is connected to the welding control system 3 and the industrial computer 4.

[0018] There are two mechanical monitoring devices 1, including a moving frame monitoring device and a static frame monitoring device. The static frame monitoring device is installed outside the static frame clamping jaws of the mobile rail flash welder, and the moving frame monitoring device is installed outside the moving frame clamping jaws of the mobile rail flash welder.

[0019] The mechanical monitoring device 1 includes a fixed seat 12, a micro-motion contact switch 13, a switch sliding plate 14, a connecting beam 15, a support electromagnet 16, a rail top contact head 17, a vertical slide rail 18, and a moving buffer 19. Among them, the rail top contact head 17 is connected to the micro-motion contact switch 13 and is arranged on the fixed seat 12; the support electromagnet 16 is connected to the switch sliding plate 14 through the connecting beam 15. The vertical slide rail 18 and the moving buffer 19 are arranged inside the switch sliding plate 14, and the switch sliding plate 14 is arranged on one side of the micro-motion contact switch 13.

[0020] The mechanical monitoring device 1 is connected to a sensor, and the sensor is connected to a programmable controller 2.

[0021] The sensor is a contact or non-contact sensor.

[0022] Figure 4 As shown, during the operation of the equipment, after the two rails to be welded are aligned, the moving flash welding machine 5 frame (including the static frame clamp and the moving frame clamp) is placed on the rails 20 to be welded, and the rails 20 to be welded are clamped under the drive of the hydraulic cylinder. During the welding process, the frame drives the rails to perform reciprocating motion, and upsetting is completed in the final stage of welding to achieve a complete rail welding process.

[0023] A mechanical monitoring device 1 is respectively installed outside the static frame clamping pliers and the moving frame clamping pliers of the welding machine. After the rail clamping action is completed, the support electromagnet 16 is energized and attracted, and drives the micro-motion contact switch 13 (which can also be other contact or non-contact sensors) to slide down along the vertical guide rail 18 through the connecting beam 15, so that the rail top contact head contacts the rail top. When the rails 20 to be welded and the frame of the welding machine 5 are relatively stationary, the rail top contact head remains in place; when there is relative displacement between the rails to be welded and the welding frame, the rail top contact head 17 moves accordingly, triggering the on-off state of the micro-touch switch 13 and sending a slipping signal to the programmable controller 2.

[0024] After receiving the slipping signal, the programmable controller 2 determines whether there is a slipping phenomenon during the rail welding process according to information such as whether the welding machine 1 is in the welding state; if it is confirmed that there is a slipping phenomenon during the rail welding process, the programmable controller 2 simultaneously sends relevant information to the welding control system and the industrial computer, warns the welding machine operator by means of the indicator light on the operation panel, the interface text of the control software, etc. (and can also terminate the welding process in case of emergency), and records the slipping information in the process data file of the rail welding.

[0025] Finally, it should be noted that the above embodiments are only used to describe the technical solutions of the present invention rather than to limit the technical methods. The present invention can be extended to other modifications, changes, applications, and embodiments in application, and therefore it is considered that all such modifications, changes, applications, and embodiments are within the spirit and teachings of the present invention.

Claims

1. An on-line monitoring device for slippage of a mobile rail flash welding machine, comprising a mechanical monitoring device (1), a programmable logic controller (2), a welding control system (3) and an industrial computer (4). Characterized in that the mechanical monitoring device (1) is connected to the programmable logic controller (2), and the programmable logic controller (2) is connected to the welding control system (3) and the industrial computer (4). There are two mechanical monitoring devices (1), including a moving frame monitoring device and a static frame monitoring device. The static frame monitoring device is installed outside the clamping jaws of the static frame of the mobile rail flash welding machine, and the moving frame monitoring device is installed outside the clamping jaws of the moving frame of the mobile rail flash welding machine. The mechanical monitoring device (1) includes a fixed seat (12), a micro-motion contact switch (13), a switch sliding plate (14), a connecting beam (15), a support electromagnet (16), a rail top contact head (17), a vertical slide rail (18) and a moving buffer (19). Among them, the rail top contact head (17) is connected to the micro-motion contact switch (13) and is arranged on the fixed seat (12); the support electromagnet (16) is connected to the switch sliding plate (14) through the connecting beam (15), the vertical slide rail (18) and the moving buffer (19) are arranged inside the switch sliding plate (14), and the switch sliding plate (14) is arranged on one side of the micro-motion contact switch (13).

2. The on-line monitoring device for slippage of a mobile rail flash welding machine according to claim 1. Characterized in that the mechanical monitoring device (1) is connected to a sensor, and the sensor is connected to the programmable logic controller (2).

3. The on-line monitoring device for slippage of a mobile rail flash welding machine according to claim 2. Characterized in that the sensor is a contact or non-contact sensor.

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