Device and method for preventing mistaken mounting of vehicle door hinge through photoelectric sensor

Abstract

The invention provides a device and a method for preventing mistaken mounting of a vehicle door hinge through a photoelectric sensor. The method for preventing the vehicle door hinge from being mistakenly installed through the photoelectric sensor comprises the steps that S1, equipment is installed and debugged; s2, a laser signal is generated through a photoelectric sensor, and the characteristic position of a vehicle door hinge is detected; s3, the photoelectric sensor receives the return signal and displays whether the feature points of the vehicle door hinge are scanned or not; s4, the photoelectric sensor uploads a return signal to the PLC; and S5, after receiving the signal, the PLC judges and sends an instruction to the vehicle door hinge turntable. The device and the method for preventing mistaken mounting of the vehicle door hinge through the photoelectric sensor have the advantages that the special position of the hinge is sensed in a mode of monitoring the hinge through the photoelectric sensor, so that whether the hinge is correct or not can be judged according to a return signal, and the mounting accuracy of the hinge can be ensured.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a device and method for preventing wrong installation of door hinges by using a photoelectric sensor. Background Art

[0002] The degree of automation in automobile manufacturing welding shops is becoming increasingly higher. Door assembly has gradually changed from manual assembly to robot automatic assembly, and door hinge installation has also changed from manual assembly by tooling tires to LCA loading. The robot automatically grabs the hinges and installs them on the door, and then the robot installs the hinged door to the car body.

[0003] Although the door hinges of different models have similar appearances, their sizes and structures are different. When mixed-line production is carried out, the hinges of different models must be distinguished to avoid wrong installation. Door hinges are safety-related items. Once a mistake is made, it will cause serious consequences. How to prevent mistakes is a key issue that must be solved in welding production.

[0004] In the prior art, the worker visually inspects the hinge and places it on the fixed base of the LCA tooling. The fixed base is designed according to the hinge size and can accurately fix the position of the hinge, with a certain error prevention function. There is also a baffle customized according to the hinge size above the turntable. If the hinge is not placed in place, the hinge will touch the baffle when the turntable rotates, triggering a safety alarm and stopping the turntable.

[0005] Fixing the base to prevent errors can effectively prevent a large hinge from being placed on a small base, but it cannot prevent a small hinge from being placed in a large base.

[0006] Since the hinges are similar in appearance and size, it is difficult for workers to completely prevent errors after working for a long time. Once a small hinge is placed in a large base, all subsequent operations will be performed automatically by robots, which will lead to hinge installation errors, which may seriously affect vehicle safety.

[0007] Therefore, it is necessary to provide a new device and method for preventing door hinge misassembly by using photoelectric sensors to solve the above technical problems. Summary of the invention

[0008] The technical problem solved by the present invention is to provide a device and method for preventing door hinge misinstallation by photoelectric sensors, which can sense the special position of the hinge by monitoring the hinge through photoelectric sensors, so as to determine whether the hinge is correct based on the return signal, thereby ensuring the accuracy of hinge installation.

[0009] In order to solve the above technical problems, the present invention provides a device for preventing the wrong installation of door hinges by means of photoelectric sensors, comprising: a PLC controller, the PLC controller is connected to a photoelectric sensor, the photoelectric sensor is used to identify the characteristics of the door hinges on the door hinge turntable, and the PLC controller is used to control the door hinge turntable.

[0010] The present invention also provides a method for preventing door hinge mis-assembly by using a photoelectric sensor, comprising the following steps: S1: Install and debug the equipment; S2: Generate laser signals through photoelectric sensors to detect the characteristic position of the door hinge; S3: The photoelectric sensor receives a return signal, indicating whether the feature point of the door hinge is scanned; S4: The photoelectric sensor uploads the return signal to the PLC controller; S5: After receiving the signal, the PLC controller makes a judgment and issues a command to the door hinge turntable.

[0011] Preferably, the PLC controller sends instructions to the turntable, including: if the hinge is correct, the door hinge turntable rotates normally; if the hinge is incorrect, the door hinge turntable stops.

[0012] Preferably, the equipment installation includes installing a PLC controller and a photoelectric sensor at a suitable position, and then connecting the photoelectric sensor, the door hinge turntable and the PLC controller.

[0013] Compared with the related art, the device and method for preventing door hinge misassembly by using a photoelectric sensor provided by the present invention has the following beneficial effects: The present invention provides a device and method for preventing wrong installation of a door hinge by using a photoelectric sensor. The photoelectric sensor monitors the hinge to sense a special position of the hinge, so that it can be determined whether the hinge is correct based on a return signal, thereby ensuring the accuracy of hinge installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A principle block diagram of a device for preventing wrong installation of door hinges by means of a photoelectric sensor provided by the present invention; Figure 2 A schematic diagram of a door hinge of the device for preventing door hinge mis-assembly by using a photoelectric sensor provided by the present invention; Figure 3 A schematic diagram of a hinge turntable and a sensor device of the device for preventing door hinge misassembly by using a photoelectric sensor provided by the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0016] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A principle block diagram of a device for preventing wrong installation of door hinges by means of a photoelectric sensor provided by the present invention; Figure 2 A schematic diagram of a door hinge of the device for preventing door hinge mis-assembly by using a photoelectric sensor provided by the present invention; Figure 3 A schematic diagram of a hinge turntable and a sensor device of the device for preventing door hinge misassembly by using a photoelectric sensor provided by the present invention.

[0017] The present invention provides a device for preventing wrong installation of door hinges by means of photoelectric sensors, comprising: a PLC controller, the PLC controller is connected to the photoelectric sensor, the photoelectric sensor is used to identify the characteristics of the door hinge on the door hinge turntable, and the PLC controller is used to control the door hinge turntable.

[0018] The present invention also provides a method for preventing wrong installation of a door hinge by using a photoelectric sensor, comprising: S1: Install and debug the equipment; S2: Generate laser signals through photoelectric sensors to detect the characteristic position of the door hinge; S3: The photoelectric sensor receives a return signal, indicating whether the feature point of the door hinge is scanned; S4: The photoelectric sensor uploads the return signal to the PLC controller; S5: After receiving the signal, the PLC controller makes a judgment and issues a command to the door hinge turntable.

[0019] The PLC controller sends instructions to the turntable, including: if the hinge is correct, the door hinge turntable rotates normally; if the hinge is incorrect, the door hinge turntable stops.

[0020] The equipment installation includes installing the PLC controller and the photoelectric sensor at a suitable position, and then connecting the photoelectric sensor, the door hinge turntable and the PLC controller.

[0021] like Figure 3 As shown, the upper layer of the door hinge turntable is the hinge of model A, and the lower layer is the hinge of model B. The hinge base is designed according to the hinge size and shape, and the hinge is fixed by positioning holes and guide pins. Since the hinge of model A is too large to be placed in the hinge base of model B, the mechanical structure can achieve error prevention. The hinge of model B can be placed in the hinge base of model A, and the robot can also grab it normally, which is easy to cause installation errors. To prevent wrong installation, a photoelectric sensor is used to detect the central axis of the tray hinge. After the hinge of model A is placed, there is a bulge in the central axis. If a signal is detected, it is installed correctly. When the hinge of model B is placed in the central axis of model A, no signal is detected, and it is considered that the hinge is placed incorrectly and the turntable does not move.

[0022] Compared with the related art, the device and method for preventing door hinge misassembly by using a photoelectric sensor provided by the present invention has the following beneficial effects: The present invention provides a device and method for preventing wrong installation of a door hinge by using a photoelectric sensor. The photoelectric sensor monitors the hinge to sense a special position of the hinge, so that it can be determined whether the hinge is correct based on a return signal, thereby ensuring the accuracy of hinge installation.

[0023] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for preventing wrong installation of door hinges by means of a photoelectric sensor, characterized in that: include: A PLC controller is connected to a photoelectric sensor, the photoelectric sensor is used to identify the characteristics of the door hinge on the door hinge turntable, and the PLC controller is used to control the door hinge turntable.

2. A method for preventing wrong installation of door hinges by using a photoelectric sensor, characterized in that: The following steps are included S1: Install and debug the equipment; S2: Generate laser signals through photoelectric sensors to detect the characteristic position of the door hinge; S3: The photoelectric sensor receives a return signal, indicating whether the feature point of the door hinge is scanned; S4: The photoelectric sensor uploads the return signal to the PLC controller; S5: After receiving the signal, the PLC controller makes a judgment and issues a command to the door hinge turntable.

3. The method for preventing wrong installation of door hinges by using a photoelectric sensor according to claim 2, characterized in that: The PLC controller sends instructions to the turntable, including: if the hinge is correct, the door hinge turntable rotates normally; if the hinge is incorrect, the door hinge turntable stops.

4. The method for preventing door hinge mis-assembly by using a photoelectric sensor according to claim 2, characterized in that: The equipment installation includes installing the PLC controller and the photoelectric sensor at a suitable position, and then connecting the photoelectric sensor, the door hinge turntable and the PLC controller.

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