Monitoring device for sequential tightening of seat bolts, control system and control method thereof

Abstract

The present application relates to the field of automatic production and processing of automobile parts, in particular to a monitoring device, a control system and a control method for sequential tightening of seat bolts. The device comprises a hanging plate, a connecting piece, and front and rear swing plates. The hanging plate is linked to the connecting piece via a pin shaft, and the connecting piece is connected to the front and rear swing plates via pin shafts. The device is controlled by a control system. The present application has the following advantages: the above device realizes sequential control of the tightening process of multiple bolts and avoids missed bolts.

Description

Technical fields:

[0001] This invention relates to the field of automated production and processing of automotive parts, specifically to a sequential tightening system and control method for seat bolts. Background technology:

[0002] Tightening bolts is a common process during seat assembly. Operators follow the Operational Specifications (ODS) and use an electric wrench to tighten the bolts before proceeding with other tasks. The following problems arise during the tightening process:

[0003] 1. When multiple bolts need to be tightened, it is difficult to control and monitor whether the operator tightens them in the order required by the ODS.

[0004] 2. Long-term operation can easily lead to fatigue and misoperation, resulting in missing bolts. If the bolts are not fully tightened, the chair is released to the next work station. If this is not detected, defective products will be leaked, posing a safety hazard. Summary of the Invention

[0005] To address the shortcomings mentioned above, this invention provides a method for sequential control of multiple bolt tightening processes, ensuring product quality and workmanship. Specifically, this is achieved through the following technical solution:

[0006] A sequential tightening device for seat bolts includes a hanging plate, a connecting member, and a front and rear swing plate. The hanging plate is connected to the connecting member via a pin, and the connecting member is connected to the front and rear swing plate via a pin. A pair of right-angled lifting sensor fixing plates are fixedly connected to the bottom of the front and rear swing plates, and the lifting sensor fixing plates are provided with lifting sensors. A pair of right-angled tilt sensor fixing plates are fixedly connected to the lifting sensor fixing plates in the horizontal direction, and the tilt sensor fixing plates are provided with tilt sensors. A balancer mounting plate is fixedly installed at the bottom of the front and rear swing plates. A set of retractable carbon rods, including an outer carbon rod and an inner carbon rod, is fixedly connected to the tilt sensor fixing plates via a tension inner guide block. A tightening gun is fixedly connected to the inner carbon rod via a movable adapter.

[0007] Furthermore, in the above technical solution, the pair of tension sensor fixing plates includes a horizontal tension sensor fixing plate and a vertical tension sensor fixing plate, and the pair of tilt sensor fixing plates includes a horizontal tilt sensor fixing plate and a vertical tilt sensor fixing plate; the lower surface of the horizontal tension sensor fixing plate is fixedly connected to the upper surface of the horizontal tilt sensor fixing plate.

[0008] Furthermore, the above technical solution also includes a tension guide block, which is disposed on the upper surface of the horizontal tension sensor fixing plate.

[0009] Furthermore, in the above technical solution, a clamping ring is provided at the end of the inner carbon rod, the tightening gun is fixed on the assembly ring, and the assembly ring is fixedly connected to the movable adapter.

[0010] A control system for a sequential tightening device for seat bolts, the system comprising a sequential tightening device for seat bolts, a MES system, an tilt sensor, a tension sensor, and a TPS control system, wherein the components are communicatively connected; the MES system controls the production line release, the TPS system controls the operation of the tightening device, the angle sensor includes an angle meter, a balancer, and an encoder, the angle meter and balancer collect angle, balance, and other data of the tightening device, and the encoder is used for encoding a preset scheme.

[0011] A control method for a control system of a seat bolt sequential tightening device, characterized by comprising the following steps:

[0012] S1: The TPS control system generates barcodes based on preset bolt position parameters and tightening schemes for different seats;

[0013] S2: The MES system scans the barcode to obtain the seat barcode information and sends it to the TPS control system;

[0014] S3: The TPS control system calls up a preset scheme based on the barcode information and controls the electric wrench to perform a tightening operation;

[0015] S4: The TPS control system acquires the tightening result, determines the tightening, and releases a completion signal upon completion of tightening.

[0016] Furthermore, in the above technical solution, step 4, the tightening determination, includes the following specific steps:

[0017] S41: Determine whether the current position is tightened. If the result is "yes", proceed to step S42; if the result is "no", proceed to step S43.

[0018] S42: Determine whether all parts are tightened. If the result is "yes", release the completion signal; if the result is "no", control the electric wrench to move to the next tightening position and repeat step S41.

[0019] S43: Confirm whether this is the first time to re-tighten. If the result is "yes", control the electric wrench to loosen and re-tighten, and then repeat step S41. If the result is "no", continue to determine whether this is the fourth time to re-tighten. If the result is "yes", stop the machine and alarm. If the result is "no", use the key to authorize loosening and re-tightening, and then repeat step S41.

[0020] Compared with existing operating techniques, the present invention has the following advantages:

[0021] The above-mentioned device enables sequential control of multiple bolt tightening processes and prevents bolts from being missed or tightened incorrectly during manual operations, thus preventing defective products from being leaked and causing safety hazards. Attached Figure Description

[0022] Figure 1 This is a structural diagram of a device described in this invention;

[0023] Figure 2 , Figure 3 This is a schematic diagram of the control system described in this invention;

[0024] Figure 4 This is a flowchart of the control method described in this invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 As shown, the device includes a hanging plate 1, a connecting piece 2, and a front and rear swing plate 3. The hanging plate 1 is connected to the connecting piece 2 via a pin, and the connecting piece 2 is connected to the front and rear swing plate 3 via a pin. A pair of right-angled lifting sensor fixing plates 4 and 5 are fixedly connected to the bottom of the front and rear swing plate 3, and a lifting sensor is provided on the lifting sensor fixing plate. A pair of right-angled tilt sensor fixing plates 7 and 8 are fixedly connected to the lifting sensor fixing plates in the horizontal direction, and a tilt sensor is provided on the tilt sensor fixing plate. A set of retractable carbon rods, including an outer carbon rod 14 and an inner carbon rod 15, are fixedly connected to the tilt sensor fixing plate via a tension inner guide block 12. A tightening gun 17 is fixedly connected to the inner carbon rod 15 via a movable adapter 22. The pair of tension sensor fixing plates includes a horizontal tension sensor fixing plate 5 and a vertical tension sensor fixing plate 4, and the pair of tilt sensor fixing plates includes a horizontal tilt sensor fixing plate 7 and a vertical tilt sensor fixing plate 8; the lower surface of the horizontal tension sensor fixing plate 5 is fixedly connected to the upper surface of the horizontal tilt sensor fixing plate 7. A balancer hanging plate 6 is fixedly installed at the bottom of the front and rear swing plates for hanging the balancer 24 to ensure the balance of the device.

[0027] The device also includes a tension guide block 13, which is disposed on the upper surface of the horizontal tension sensor fixing plate 5.

[0028] The inner carbon rod of this device is provided with a set of clamping rings 18 and 19 at its end. The tightening gun 17 is fixed on the assembly ring 23, and the assembly ring 23 is fixedly connected to the movable adapter 22.

[0029] like Figure 2 , Figure 3As shown, the system includes a sequential tightening device for seat bolts, a MES system, an inclination sensor, a tension sensor, and a TPS control system, with communication connections between the various parts; the MES system controls the release of the production line, the TPS system controls the operation of the tightening device, the angle sensor includes an angle meter, a balancer, and an encoder 11, the angle meter and balancer collect data such as the angle and balance of the tightening device, and the encoder 11 is used for encoding a preset scheme.

[0030] like Figure 4 As shown, a control method for a seat bolt sequential tightening system includes the following steps:

[0031] S1: The TPS control system generates barcodes based on preset bolt position parameters and tightening schemes for different seats;

[0032] S2: The MES system scans the barcode to obtain the seat barcode information and sends it to the TPS control system;

[0033] S3: The TPS control system calls up a preset scheme based on the barcode information and controls the electric wrench to perform a tightening operation;

[0034] S4: The TPS control system acquires the tightening result, determines the tightening, and releases a completion signal upon completion of tightening.

[0035] Step 4, the tightening determination, includes the following specific steps:

[0036] S41: Determine whether the current position is tightened. If the result is "yes", proceed to step S42; if the result is "no", proceed to step S43.

[0037] S42: Determine whether all parts are tightened. If the result is "yes", release the completion signal; if the result is "no", control the electric wrench to move to the next tightening position and repeat step S41.

[0038] S43: Confirm whether this is the first time to re-tighten. If the result is "yes", control the electric wrench to loosen and re-tighten, and then repeat step S41. If the result is "no", continue to determine whether this is the fourth time to re-tighten. If the result is "yes", stop the machine and alarm. If the result is "no", use the key to authorize loosening and re-tightening, and then repeat step S41.

[0039] Those skilled in this art, after understanding the technical means of this invention, will naturally be able to adjust it according to actual needs to achieve the functional control. Therefore, all equivalent changes and modifications made within the scope of the claims of this invention should still fall within the scope of this patent.

Claims

1. A monitoring device for the sequential tightening of seat bolts, characterized in that: The device includes a hanging plate, a connecting piece, and front and rear swing plates. The hanging plate is connected to the connecting piece via a pin, and the connecting piece is connected to the front and rear swing plates via a pin. A pair of lifting sensor fixing plates set at right angles are fixedly connected to the bottom of the front and rear swing plates, and a lifting sensor is provided on the lifting sensor fixing plates; A pair of tilt sensor mounting plates set at right angles are fixedly connected to a lifting sensor mounting plate in the horizontal direction, and a tilt sensor is provided on the tilt sensor mounting plate; A balancer mounting plate is fixedly installed at the bottom of the front and rear swing plates; A set of telescopic carbon rods, including an outer carbon rod and an inner carbon rod, wherein the outer carbon rod is fixedly connected to the tilt sensor fixing plate by a pull-up inner guide block; the telescopic carbon rod is equipped with a pull-wire encoder inside, which is used to monitor the vertical Z-axis position coordinate in real time, and is equipped with tilt sensors in the horizontal and front-back directions to realize the real-time coordinate position of the X and Y axes. The bolt tightening control is determined by the real-time coordinate position information of the X, Y, and Z axes. A tightening gun is fixedly connected to the inner carbon rod via a movable adapter; The pair of lifting sensor fixing plates includes a horizontal lifting sensor fixing plate and a vertical lifting sensor fixing plate, and the pair of tilt sensor fixing plates includes a horizontal tilt sensor fixing plate and a vertical tilt sensor fixing plate; the lower surface of the horizontal lifting sensor fixing plate is fixedly connected to the upper surface of the horizontal tilt sensor fixing plate.

2. The monitoring device for sequential tightening of seat bolts as described in claim 1, characterized in that: The inner carbon rod is provided with a clamping ring at its end for connecting a movable adapter. The movable adapter is connected to an assembly ring, and the tightening gun is fixed on the assembly ring.

3. A control system for the monitoring device as described in claim 1, characterized in that: The system includes a sequential tightening device for seat bolts, a MES system, a tilt sensor, a tension sensor, and a TPS control system, all of which are interconnected. The MES system is used to scan seat barcodes, identify vehicle models, and control the release of the production line. The TPS control system is used to store bolt position parameters and tightening schemes, and to determine whether the current tightening position is valid based on three-dimensional coordinates.

4. The control method of the control system as described in claim 3, characterized in that: Includes the following steps: S1: The TPS control system generates barcodes based on preset bolt position parameters and tightening schemes for different seats; S2: The MES system scans the barcode to obtain the seat barcode information and sends it to the TPS control system; S3: The TPS control system calls up a preset scheme based on the barcode information and controls the electric wrench to perform a tightening operation; S4: The TPS control system acquires the tightening result, determines the tightening, and releases a completion signal upon completion of tightening.

5. The control method of the control system as described in claim 4, characterized in that: The tightening determination step S4 includes the following specific steps: S41: Determine whether the current position is tightened. If the result is "yes", proceed to step S42; if the result is "no", proceed to step S43. S42: Determine whether all parts are tightened. If the result is "yes", release the completion signal; if the result is "no", control the electric wrench to move to the next tightening position and then repeat step S41. S43: Confirm whether this is the first time to re-tighten. If the result is "yes", control the electric wrench to loosen and re-tighten, and then repeat step S41. If the result is "no", continue to determine whether this is the fourth time to re-tighten. If the result is "yes", stop the machine and alarm. If the result is "no", use the key to authorize loosening and re-tightening, and then repeat step S41.

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