A mistake-proofing method for similar threshold beams

Abstract

The present application provides a kind of error-proofing method of similar threshold beam, comprising the following steps: S1. preliminary clamping;S2. sensor to designated position;S3. optical fiber sensor detection;S4. magnetic sensor detection;S5. judgment module distinguishes;S6. assembly and disassembly.The present application uses the program processing of PLC to judge whether it matches the threshold beam that needs to be processed, if it does not match, the equipment cannot proceed to the next step, on the basis of not changing the existing tooling fixture, using optical fiber sensor, magnetic sensor does not contact the product itself, while accurately identifying the threshold beam difference, will be wrong in the first step of processing, avoids the problem of assembly error found after processing is completed, greatly saves the expenditure of manpower and financial resources, perfectly solves the problem of N60 / 61 threshold beam assembly error.

Description

Technical Field

[0001] This invention relates to the field of vehicle parts manufacturing and installation technology, specifically to a method for preventing errors in similar door sill beams. Background Technology

[0002] Currently, when assembling the B-pillar inner panel and sill beam, the structures of the N60 and N61 B-pillar inner panels and sill beams are highly similar. Error prevention relies solely on the warning device threaded holes and manual pin switching on the tooling, which presents the following technical defects: workers frequently assemble these two parts incorrectly. The tooling, relying on the warning device threaded holes and manual pin switching for error prevention, only prevents the N60 sill from not fitting when installing the N61, but allows the N61 sill to fit when installing the N60. It cannot completely prevent errors. Furthermore, the B-pillar brackets N60 and N61 lack error prevention structures; only the N61-C01 sills differ (C01 adds 10 M6 rivet nuts to the N61). The sill beams have slight inconsistencies in shape and lack error prevention measures.

[0003] Therefore, designing a similar error-proofing method for threshold beams has become an urgent problem to be solved. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides a method for preventing errors in similar threshold beams to solve at least one of the above-mentioned technical problems.

[0005] The technical solution of this invention is: a method for preventing errors in a similar door sill beam, comprising a B-pillar support and a door sill beam, wherein the B-pillar support and the door sill beam are respectively fixed on a clamp, and the door sill beam is respectively arranged with a fiber optic sensor and a magnetic sensor, the fiber optic sensor and the magnetic sensor are respectively set at the piston end of a cylinder, and the fiber optic sensor, the magnetic sensor and the cylinder are all connected to a PLC, comprising the following steps:

[0006] S1. Initial clamping,

[0007] Fix the B-pillar bracket and sill beam to the clamps respectively;

[0008] S2. Move the sensor to the designated position.

[0009] ① The fiber optic sensor and the magnetic sensor are respectively installed at the piston end of the cylinder;

[0010] ②Start the PLC to control the piston end of the cylinder to move to the designated position;

[0011] S3. Fiber optic sensor detection

[0012] ① Fiber optic sensors identify whether there is a corresponding nut on the door sill beam;

[0013] ② When a corresponding nut is detected on the sill beam, a first signal is sent to the PLC, and the PLC sends the first signal to the judgment module;

[0014] ③ When it is detected that there is no corresponding nut on the threshold beam, the first signal is not sent to the PLC. If the PLC does not receive the first signal within the set time, the PLC will generate a temporary first signal and send it to the judgment module.

[0015] S4. Magnetic sensor detection,

[0016] ① The magnetic sensor senses the stroke of the cylinder and outputs a second signal to the PLC, which then sends the second signal to the judgment module;

[0017] ② The magnetic sensor senses the stroke of the cylinder but does not send a second signal to the PLC. If the PLC does not receive the second signal within a set time, the PLC will generate a temporary second signal and send it to the judgment module.

[0018] S5. Judgment module identification,

[0019] ① The judgment module will match the received first signal with the vehicle model to which the door sill beam belongs;

[0020] ② Match the second signal with the set model threshold; when the set model and the corresponding vehicle model are successfully matched, the threshold beam specifications are consistent with the set specifications, and proceed to the next step;

[0021] ③ The judgment module matches the received temporary first signal with the vehicle model to which the sill beam belongs, and the judgment module matches the received temporary second signal with the set model. If the set model and the vehicle model do not match successfully, the sill beam specifications are inconsistent with the set specifications. The judgment module sends a warning message to the PLC, the PLC screen displays the warning message, and notifies manual intervention. After the sill beam is replaced, the process returns to step S1.

[0022] S6. Assembly and disassembly

[0023] ① Assemble the B-pillar bracket and door sill beam;

[0024] ② Remove the assembled B-pillar bracket and sill beam, and repeat steps S1~S6 above.

[0025] This invention uses PLC program processing to determine whether it matches the door sill beam to be processed. If it does not match, the equipment cannot proceed to the next step. Without changing the existing tooling fixtures, fiber optic sensors and magnetic sensors are used to accurately identify door sill beam differences without contacting the product itself. This prevents errors from being discovered in the first step of processing, avoiding the problem of discovering assembly errors only after processing is completed. This greatly saves manpower and financial resources and perfectly solves the problem of N60 / 61 door sill beam assembly errors. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the installation structure of the present invention.

[0027] In the diagram: 1. B-pillar support; 2. Door sill beam; 3. Clamp; 4. Cylinder; 5. Magnetic sensor; 6. Fiber optic sensor. Detailed Implementation

[0028] The present invention will now be further described with reference to the accompanying drawings.

[0029] See Figure 1 The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0030] Example 1: A method for preventing errors in similar door sill beams, referencing Figure 1 The system includes a B-pillar support 1 and a door sill beam 2, which are fixed on a clamp 3. The door sill beam 2 is respectively arranged with an optical fiber sensor 6 and a magnetic sensor 5. The optical fiber sensor 6 and the magnetic sensor 5 are respectively set on the piston end of a cylinder 4. The optical fiber sensor 6, the magnetic sensor 5, and the cylinder 4 are all connected to a PLC. The system includes the following steps:

[0031] S1. Initial clamping,

[0032] Fix the B-pillar bracket 1 and the sill beam 2 onto the clamp 3 respectively;

[0033] S2. Move the sensor to the designated position.

[0034] ① The fiber optic sensor 6 and the magnetic sensor 5 are respectively installed at the piston end of the cylinder 4;

[0035] ②Start the PLC to control the piston end of cylinder 4 to move to the designated position;

[0036] S3. Fiber optic sensor detection

[0037] ① Fiber optic sensor 6 identifies whether there is a corresponding nut on the threshold beam 2;

[0038] ② When a corresponding nut is detected on the threshold beam 2, a first signal is sent to the PLC, and the PLC sends the first signal to the judgment module;

[0039] S4. Magnetic sensor detection,

[0040] The magnetic sensor outputs a second signal to the PLC by sensing the stroke of the cylinder 4, and the PLC sends the second signal to the judgment module.

[0041] S5. Judgment module identification,

[0042] ① The judgment module will match the received first signal with the vehicle model to which the sill beam 2 belongs;

[0043] ② Match the second signal with the set model threshold; when the set model and the corresponding vehicle model are successfully matched, the specifications of the threshold beam 2 are consistent with the set specifications, and proceed to the next step;

[0044] S6. Assembly and disassembly

[0045] ① Assemble the B-pillar bracket 1 and the door sill beam 2;

[0046] ② Disassemble the assembled B-pillar bracket 1 and sill beam 2, and repeat steps S1~S6 above. This invention uses PLC program processing to determine whether it matches the sill beam to be processed. If it does not match, the equipment cannot proceed to the next step. Without changing the existing tooling fixtures, fiber optic sensors and magnetic sensors are used to accurately identify the differences in sill beams without contacting the product itself, thus preventing errors from occurring in the first step of processing. This avoids the problem of discovering assembly errors only after processing is completed, greatly saving manpower and financial resources, and perfectly solving the problem of N60 / 61 sill beam assembly errors.

[0047] Example 2: Based on Example 1, in the fiber optic sensor detection of step S3, when it is detected that the threshold beam 2 does not have a corresponding nut, the first signal is not sent to the PLC. If the PLC does not receive the first signal within a set time, the PLC will generate a temporary first signal and send it to the judgment module.

[0048] Example 3: Based on Example 2, in the judgment module identification of step S5, the judgment module matches the received temporary first signal with the vehicle model to which the sill beam 2 belongs.

[0049] Example 4: Based on Example 2, in the magnetic sensor detection of step S4, the magnetic sensor does not send a second signal to the PLC by sensing the stroke of the cylinder 4. If the PLC does not receive the second signal within a set time, the PLC will generate a temporary second signal and send it to the judgment module.

[0050] Example 5: Based on Example 4, in the judgment module identification of step S5, the judgment module matches the received temporary second signal with the set model.

[0051] Example 6: Based on Example 5, in the judgment module identification of step S5, if the set model and the corresponding vehicle model do not match successfully, the specifications of the sill beam 2 are inconsistent with the set specifications. The judgment module sends a warning message to the PLC, the PLC screen displays the warning message, and notifies manual intervention. After the sill beam 2 is replaced, the process returns to step S1.

[0052] In practice, the magnetic sensor 5 is a magnetostrictive displacement sensor.

[0053] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for preventing errors in a similar door sill beam, comprising a B-pillar support (1) and a door sill beam (2), characterized in that: The B-pillar bracket (1) and the sill beam (2) are respectively fixed on the clamp (3). The sill beam (2) is respectively arranged with the fiber optic sensor (6) and the magnetic sensor (5). The fiber optic sensor (6) and the magnetic sensor (5) are respectively set on the piston end of the cylinder (4). The fiber optic sensor (6), the magnetic sensor (5), and the cylinder (4) are all connected to the PLC. The following steps are included: S1. Initial clamping, Fix the B-pillar bracket (1) and the sill beam (2) onto the clamp (3) respectively; S2. Move the sensor to the designated position. ① The fiber optic sensor (6) and the magnetic sensor (5) are respectively installed at the piston end of the cylinder (4); ②Start the PLC to control the piston end of cylinder (4) to move to the specified position; S3. Fiber optic sensor detection ① The fiber optic sensor (6) identifies whether there is a corresponding nut on the threshold beam (2); ②When a nut is detected on the threshold beam (2), a first signal is sent to the PLC, and the PLC sends the first signal to the judgment module; S4. Magnetic sensor detection, The magnetic sensor outputs a second signal to the PLC by sensing the stroke of the cylinder (4), and the PLC sends the second signal to the judgment module. S5. Judgment module identification, ① The judgment module will match the received first signal with the vehicle model to which the door sill beam (2) belongs; ② Match the second signal with the set model threshold; when the set model and the vehicle model are successfully matched, the threshold beam (2) specifications are consistent with the set specifications, and proceed to the next step; S6. Assembly and disassembly ① Assemble the B-pillar bracket (1) and the door sill beam (2); ② Remove the assembled B-pillar bracket (1) and sill beam (2) and repeat steps S1~S6 above.

2. The error-proofing method for a similar sill beam according to claim 1, characterized in that: In the fiber optic sensor detection of step S3, when it is detected that the threshold beam (2) does not have a corresponding nut, the first signal is not sent to the PLC. If the PLC does not receive the first signal within a set time, the PLC will generate a temporary first signal and send it to the judgment module.

3. The error-proofing method for a similar sill beam according to claim 2, characterized in that: In the judgment module identification in step S5, the judgment module matches the received temporary first signal with the vehicle model to which the sill beam (2) belongs.

4. The error-proofing method for a similar sill beam according to claim 2, characterized in that: In the magnetic sensor detection in step S4, the magnetic sensor does not send a second signal to the PLC by sensing the stroke of the cylinder (4). If the PLC does not receive the second signal within a set time, the PLC will generate a temporary second signal and send it to the judgment module.

5. The error-proofing method for a similar sill beam according to claim 4, characterized in that: In the judgment module identification in step S5, the judgment module matches the received temporary second signal with the set model.

6. The error-proofing method for a similar threshold beam according to claim 5, characterized in that: In the judgment module identification of step S5, if the set model and the vehicle model are not matched successfully, the specifications of the door sill beam (2) are inconsistent with the set specifications. The judgment module sends a warning message to the PLC, the PLC screen displays the warning message, and notifies the human to intervene. After the door sill beam (2) is replaced, the process returns to step S1.

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