Multi-point tightening method, device and equipment for vehicle parts and storage medium

Abstract

The invention discloses a vehicle part multi-point-position tightening method, device and equipment and a storage medium, relates to the technical field of vehicle part installation, and discloses a vehicle part multi-point-position tightening method which comprises the steps that when a vehicle enters a tightening station, the position of a tightening point and the torque of the tightening point are obtained; sending the position of the tightening point to the positioning device, so that the positioning device determines the coordinate of the tightening point based on the position of the tightening point and feeds back the coordinate; setting a tightening sequence according to the tightening point coordinates and the tightening point torques; and tightening the parts according to the tightening sequence to obtain a tightening result, and completing multi-point tightening according to the tightening result. By means of the technical means that a space vision positioning system is combined with tightening sequence control, mistake-proofing control and tightening quality guarantee of vehicle part multi-point-position tightening operation are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle parts installation, and in particular to a multi-point tightening method, device, equipment and storage medium for vehicle parts. Background Art

[0002] In the process of automobile manufacturing, each vehicle needs to be assembled with a large number of parts at multiple workstations, and tightening operations are required during the assembly process. Tightening operations are a key step to ensure assembly quality and safety. In tightening operations, when the same tool is used to tighten different standard parts at the same workstation, and the bolts of these standard parts have the same size but different required torques, it is easy for the operator to cause the problem of wrong tightening due to failure to operate in the predetermined order. For example, if the 8Nm part is tightened first and then the 13Nm part is tightened, the former may be under-tightened and the latter may be over-tightened, thus burying quality risks. In serious cases, it may even lead to product recalls, causing huge safety risks and economic losses.

[0003] In traditional technical solutions, to solve similar problems, devices such as "socket selectors" are usually used to physically distinguish different specifications of screwdriver bits / nut sockets to avoid screwing them wrong. However, such methods cannot effectively prevent mistakes in scenarios where the torque is different but the bolt size is the same, because they can only identify the difference in bolt shape, but not the difference in torque of bolts of the same size.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of this application is to provide a multi-point tightening method, device, equipment and storage medium for vehicle parts, aiming to solve the technical problem of how to prevent operators from tightening incorrectly due to incorrect tightening sequence when the bolts of standard parts have the same size but different torques.

[0006] To achieve the above purpose, the present application proposes a multi-point tightening method for vehicle parts, the method is applied to a visual server of a spatial visual positioning system, the spatial visual positioning system includes a visual server and a positioning device, the method includes:

[0007] When the vehicle enters the tightening station, the tightening point position and tightening point torque are obtained;

[0008] Sending the tightening point position to the positioning device, so that the positioning device determines the tightening point coordinates based on the tightening point position and feeds back;

[0009] Setting a tightening sequence according to the tightening point coordinates and the tightening point torques;

[0010] Tighten the parts according to the tightening sequence to obtain a tightening result, and complete multi-point tightening according to the tightening result.

[0011] In one embodiment, the steps of tightening the parts according to the tightening sequence to obtain a tightening result, and completing multi-point tightening according to the tightening result include:

[0012] Obtain the current point information and subsequent point information according to the tightening sequence;

[0013] Tighten the parts according to the current point information to obtain a tightening result;

[0014] Determine whether there is a tightening failure condition in the tightening result;

[0015] When there is a tightening failure condition in the tightening result, obtain the number of failures;

[0016] When the number of failures is greater than or equal to the failure number threshold, complete multi-point tightening according to the subsequent point information.

[0017] In one embodiment, the steps of, when the number of failures is greater than or equal to the failure number threshold, completing multi-point tightening according to the subsequent point information include:

[0018] When the number of failures is greater than or equal to the failure number threshold, determine whether the subsequent point is the target point according to the subsequent point information;

[0019] When the subsequent point is not the target point, determine whether the tightening coordinates match according to the subsequent point information;

[0020] When the tightening coordinates match, tighten the parts according to the subsequent point information, update the tightening result, and complete multi-point tightening according to the updated tightening result.

[0021] In one embodiment, after the step of, when there is a tightening failure condition in the tightening result, obtaining the number of failures, it further includes:

[0022] When the number of failures is less than the failure number threshold, tighten the parts according to the current point information and record the tightening result;

[0023] When the tightening result is a failure, update the number of failures.

[0024] In one embodiment, before the steps of tightening the parts according to the tightening sequence to obtain a tightening result, and completing multi-point tightening according to the tightening result, it further includes:

[0025] Obtain the current point information and the points to be tightened information according to the tightening sequence;

[0026] When the current point position information is different from the to-be-tightened point position information, stop the tightening operation and issue a prompt for stopping the tightening operation.

[0027] In one embodiment, the step of sending the tightening point position to the positioning device so that the positioning device determines the tightening point coordinates based on the tightening point position and feeds back includes:

[0028] Send the tightening point position to the positioning device so that the positioning device determines the positioning origin based on the tightening point position and feeds back;

[0029] Determine the positioning coordinate system according to the positioning origin;

[0030] Send the positioning coordinate system to the positioning device so that the positioning device determines the tightening point coordinates based on the positioning coordinate system and the tightening point position and feeds back.

[0031] In one embodiment, after the step of tightening the parts according to the tightening sequence to obtain a tightening result and completing the multi-point tightening according to the tightening result, it further includes:

[0032] When there is a failed point in the multi-point tightening result, obtain the failed point information;

[0033] Perform repair according to the failed point information to obtain a repair result;

[0034] Update the multi-point tightening result according to the repair result, and complete the vehicle part tightening process according to the updated multi-point tightening result.

[0035] In addition, to achieve the above object, the present application further provides a multi-point tightening device for vehicle parts. The multi-point tightening device for vehicle parts includes: an information acquisition module, configured to acquire the tightening point position and the tightening point torque when the vehicle enters the tightening station;

[0036] A coordinate determination module, configured to send the tightening point position to a positioning device so that the positioning device determines the tightening point coordinates based on the tightening point position and feeds back;

[0037] A sequence setting module, configured to set the tightening sequence according to the tightening point coordinates and the tightening point torque;

[0038] A part tightening module, configured to tighten the parts according to the tightening sequence to obtain a tightening result, and complete the multi-point tightening according to the tightening result.

[0039] In addition, to achieve the above-mentioned objectives, the present application also proposes a multi-point tightening device for vehicle parts, the device comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the multi-point tightening method for vehicle parts as described above.

[0040] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the multi-point tightening method for vehicle parts as described above are implemented.

[0041] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the multi-point tightening method for vehicle parts as described above are implemented.

[0042] One or more technical solutions proposed in this application have at least the following technical effects:

[0043] After the vehicle enters the tightening station, the position and torque requirements of each tightening point are obtained to ensure the precise positioning of each tightening point. The position of the tightening point is sent to the positioning device, which determines the coordinates of the tightening point based on these position information and feeds back to the system, ensuring that the spatial position of each tightening point is monitored in real time. According to the feedback coordinate information and torque requirements, the correct tightening sequence is set to ensure that the tightening operation is performed in the predetermined order, avoiding the problem of insufficient torque or over-tightening due to incorrect sequence. According to the actual tightening results, the detection is carried out, and multi-point tightening is completed through precise feedback control. Compared with the existing technology, through precise spatial positioning and dynamic sequence control, the risk of wrong tightening caused by wrong tightening sequence or inaccurate position in the traditional method is effectively solved, the tightening quality is greatly improved, the rework time is reduced, and the production efficiency is improved. At the same time, the quality hazards and safety risks caused by wrong tightening are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0046] Figure 1Schematic flow chart provided by Embodiment 1 of the multi-point tightening method for vehicle parts in this application;

[0047] Figure 2 Schematic diagram of the spatial vision positioning system provided by Embodiment 1 of the multi-point tightening method for vehicle parts in this application;

[0048] Figure 3 Schematic flow chart provided by Embodiment 2 of the multi-point tightening method for vehicle parts in this application;

[0049] Figure 4 Brief schematic flow chart of the multi-point tightening method for vehicle parts provided by Embodiment 2 of this application;

[0050] Figure 5 Schematic diagram of the module structure of the multi-point tightening device for vehicle parts in the embodiment of this application;

[0051] Figure 6 Schematic diagram of the device structure of the hardware operating environment involved in the multi-point tightening method for vehicle parts in the embodiment of this application.

[0052] The realization of the purpose, functional features and advantages of this application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0053] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of this application and are not used to limit this application.

[0054] For a better understanding of the technical solutions of this application, the following will be described in detail in combination with the accompanying drawings of the specification and specific implementation manners.

[0055] The main solution of the embodiment of this application is: when the vehicle enters the tightening station, obtain the tightening point position and the tightening point torque; send the tightening point position to the positioning device so that the positioning device determines the tightening point coordinates based on the tightening point position and feeds back; set the tightening sequence according to the tightening point coordinates and the tightening point torque; perform part tightening according to the tightening sequence to obtain a tightening result, and complete multi-point tightening according to the tightening result.

[0056] In this embodiment, for the convenience of description, the following will be described with the vision server that identifies the spatial vision positioning system as the execution subject.

[0057] Since the prior art has the same bolt size but different torques for standard parts, how to prevent operators from wrong tightening due to wrong tightening sequence? This application provides a solution. After the vehicle enters the tightening station, the position and torque requirements of each tightening point are obtained to ensure the precise positioning of each tightening point. The tightening point position is sent to the positioning device, which determines the coordinates of the tightening point based on these position information and feeds back to the system, ensuring that the spatial position of each tightening point is monitored in real time. According to the feedback coordinate information and torque requirements, the correct tightening sequence is set to ensure that the tightening operation is performed in a predetermined order, avoiding the problem of insufficient torque or over-tightening due to wrong sequence. According to the actual tightening results, detection is performed, and multi-point tightening is completed through precise feedback control. Compared with the prior art, through precise spatial positioning and dynamic sequence control, the risk of wrong tightening caused by wrong tightening sequence or inaccurate position in the traditional method is effectively solved, the tightening quality is greatly improved, the rework time is reduced, and the production efficiency is improved, while avoiding the quality hazards and safety risks caused by wrong tightening.

[0058] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a multi-point tightening device for vehicle parts, and a visual server of a spatial visual positioning system, etc. The visual server of a spatial visual positioning system is taken as an example to illustrate this embodiment and the following embodiments.

[0059] Based on this, the embodiment of the present application provides a multi-point tightening method for vehicle parts, referring to Figure 1 , Figure 1 This is a flow chart of a first embodiment of a multi-point tightening method for vehicle parts of the present application.

[0060] In this embodiment, the multi-point tightening method of vehicle parts includes steps S10 to S40:

[0061] Step S10, when the vehicle enters the tightening station, obtaining the tightening point position and the tightening point torque;

[0062] It should be noted that the tightening station refers to the work area on the automobile production line used to tighten vehicle parts. At this station, assembly workers or automated equipment will tighten standard parts such as bolts and nuts on the vehicle according to process requirements to ensure the tightness of parts and the safety of the vehicle.

[0063] Additionally, the tightening point position refers to the location of the specific part to be tightened within the entire operation area during the part tightening operation. In the automotive manufacturing scenario, for example, the specific position of a certain bolt to be tightened at the current work station on the vehicle frame is the spatial identification of the target point for the tightening operation. The determination of this position information is crucial for accurately performing the tightening operation, directly related to whether the part is installed correctly, and thus affecting the quality and performance of the entire product.

[0064] Additionally, the tightening point torque refers to the specific torque value that needs to be applied when tightening a certain bolt or nut. Torque is a physical quantity that measures the tightening force, and the unit is usually Newton-meter (Nm). Different components and assembly positions have different requirements for torque. For example, the engine cylinder head bolts may require a torque of 100 Nm, while the wheel nuts may only require a torque of 80 Nm. The accurate control of torque is crucial for ensuring the fastening strength of the components and preventing over-tightening or loosening.

[0065] In addition, it should be noted that the spatial vision positioning system is a system that combines visual detection technology and spatial coordinate positioning technology to accurately determine the position and orientation of an object in three-dimensional space. The spatial vision positioning system consists of a vision server and a positioning device, and can monitor and feedback the position information of the object in real time. On the automotive assembly line, the spatial vision positioning system can be used to monitor the position of the tightening tool to ensure that it operates according to the predetermined tightening points.

[0066] Additionally, the vision server is one of the core components of the spatial vision positioning system, responsible for processing and analyzing the visual data from the positioning device. The vision server can quickly analyze the visual data and calculate the accurate position and orientation of the object in space. During the tightening operation, the vision server receives the image data from the positioning device, and through image recognition and processing algorithms, determines the real-time position of the tightening tool. If the position of the tightening tool is consistent with the preset tightening point coordinates, the vision server will issue an instruction to make the tightening tool rotate to complete the tightening operation. The vision server is also responsible for recording the tightening results for subsequent quality inspection and traceability.

[0067] Additionally, the positioning device is another key component of the spatial vision positioning system, and its main function is to determine the coordinates of the tightening point. The positioning device captures the position information of the tightening point and converts it into coordinate values. These coordinate values are then sent to the vision server for further processing. The positioning device ensures that the tightening tool can accurately reach each tightening point, thereby improving the accuracy and reliability of the tightening operation.

[0068] Refer to Figure 2 , Figure 2 which is the schematic diagram of the spatial vision positioning system provided for the first embodiment of the multi-point tightening method of the vehicle parts in this application.

[0069] As shown Figure 2 in the figure, the upper part is a black cuboid device, namely the vision server. The blue area represents the spatial range monitored by the vision server. There are two tightening tools at the bottom of the blue area, located at different positions, which can perform part tightening. The coordinate axes (X, Y, Z) in the figure represent the orientation of the three-dimensional space, helping to determine the coordinates of the tightening point in space.

[0070] Step S20: Send the position of the tightening point to the positioning device so that the positioning device determines the coordinates of the tightening point based on the position of the tightening point and feeds back.

[0071] It should be noted that the coordinates of the tightening point refer to the specific position of the tightening point in the space coordinate system determined by the positioning device. The positioning device detects the position of the tightening point and converts it into a coordinate value, which is fed back to the control system. Exemplarily, if the positioning device detects that the position of a certain tightening point in the vehicle coordinate system is (150mm, 300mm, 75mm), the coordinates of the tightening point will be used for subsequent tightening operation control.

[0072] It can be understood that accurate position information of the tightening point is obtained and this position information is transmitted to the positioning device installed on the tool. After receiving the information, the positioning device converts the position of the tightening point into the corresponding coordinates of the tightening point according to the coordinate system rules set inside it. After completing the coordinate conversion, the positioning device feeds back the calculated coordinates of the tightening point to the vision server, providing precise position data support for subsequent tightening operations. Exemplarily, in an automobile production workshop, after the vision server determines the position of a certain bolt on the engine, it sends this position information to the positioning device on the tool. The positioning device calculates the coordinates and feeds back, providing a basis for the tool to accurately reach the position of the bolt. It can provide precise position data for subsequent tightening operations, ensure that the tool can accurately reach the tightening point, improve the accuracy and precision of the tightening operation, reduce tightening problems caused by position deviation, and guarantee the assembly quality of the product.

[0073] In a feasible implementation manner, step S20 may include steps S21 to S23:

[0074] Step S21: Send the position of the tightening point to the positioning device so that the positioning device determines the positioning origin based on the position of the tightening point and feeds back.

[0075] It should be noted that the positioning origin represents a reference point selected when constructing the positioning coordinate system, and the coordinates of other positions are determined relative to this point.

[0076] It is understandable that accurate tightening point position information is obtained and this position information is sent to the positioning device installed on the tightening tool. After receiving the information, the positioning device determines the positioning origin with reference to the tightening point position. If the tightening point is near the center of a regular production part, the positioning device may use a certain fixed corner point of the part as the positioning origin. After determining the positioning origin, the positioning device feeds this information back to the vision server, providing a basis for subsequent construction of the positioning coordinate system.

[0077] Step S22: Determine the positioning coordinate system based on the positioning origin;

[0078] It should be noted that the positioning coordinate system is a coordinate system used to determine the position of an object in space. By setting the direction of the coordinate axes and the unit length in space, points in space are represented by coordinate values. In the tightening operation scenario, the positioning coordinate system can help determine the positions of the tightening point and the tool.

[0079] Exemplarily, for example, on an automotive production line, with the positioning origin as the center, mutually perpendicular X, Y, and Z axes are established to form the positioning coordinate system. Each tightening point has corresponding (X, Y, Z) coordinate values in this coordinate system, facilitating accurate description of its position. The establishment of the positioning coordinate system makes the position information more quantitative and accurate, providing an accurate position reference for the tightening operation.

[0080] Step S23: Send the positioning coordinate system to the positioning device so that the positioning device determines the tightening point coordinates based on the positioning coordinate system and the tightening point position and feeds them back.

[0081] It is understandable that the constructed positioning coordinate system information is sent to the positioning device installed on the tightening tool. After receiving the positioning coordinate system information, the positioning device combines the previously received tightening point position information and uses the internal calculation module to calculate the coordinate values of the tightening point in this coordinate system according to the rules of the positioning coordinate system.

[0082] Step S30: Set the tightening sequence according to the tightening point coordinates and the tightening point torque;

[0083] It should be noted that the tightening sequence represents the order of tightening operations on multiple tightening points determined according to certain rules. When there are multiple parts with different torque requirements at the same workstation, a reasonable tightening sequence can avoid abnormal part torques caused by improper tightening sequences and ensure product quality.

[0084] It is understandable that, based on the tightening point coordinate information, the position distribution of each tightening point in space is clarified. The tightening point torque requirements corresponding to each tightening point are determined. Considering factors such as the structural characteristics of the parts, assembly requirements, and the mutual influence of tightening operations, a reasonable tightening sequence is formulated based on the tightening point coordinates and torque requirements. Exemplarily, at a certain station in an automobile, there are two tightening points. The coordinate of one tightening point shows that it is on the left and the required torque is 13 NM, and the other is on the right with a required torque of 8 NM. Combining the assembly characteristics of the parts, it is determined to operate on the tightening point with a torque of 13 NM on the left first, and then on the tightening point with a torque of 8 NM on the right. The beneficial effect of this step is that by reasonably setting the tightening sequence, problems such as abnormal part torque caused by improper tightening sequence are avoided, and product quality defects and rework situations caused by incorrect tightening sequence are reduced.

[0085] Step S40: Tighten the parts according to the tightening sequence to obtain a tightening result, and complete multi-point tightening based on the tightening result.

[0086] It is understandable that part tightening refers to the operation process of using tools to apply torque to connectors such as bolts on parts to make them reach the specified tightening degree. In automobile production, workers use servo tools to rotate the bolts on automobile parts, and by controlling parameters such as the torque magnitude and the number of rotation turns applied by the tools, ensure the tight connection of the parts and meet the product assembly requirements.

[0087] In addition, the tightening result represents the judgment result on whether the tightening operation meets the requirements after completing the part tightening operation. It includes the inspection results in aspects such as whether the tightened torque reaches the specified value and whether the part is installed in place. For example, after tightening, the actual torque is measured with a torque detection device. If the specified torque value is reached and the installation state of the part is good without abnormal situations such as loosening, the tightening result is qualified; otherwise, it is unqualified.

[0088] It should be noted that multi-point tightening refers to the process of needing to perform tightening operations on parts at multiple different positions at one station. In automobile production, there may be multiple bolts to be tightened at the same station, and the position and torque requirements of each bolt are different. Multi-point tightening requires strict operation according to the tightening sequence and torque standard to ensure the assembly quality of the entire station.

[0089] In addition, it can be understood that, according to the tightening sequence, the operator or automated equipment uses a suitable tool to sequentially tighten each part. During the tightening process, the tool works according to the required tightening point torque set. After each part is tightened, the tightening situation is detected to obtain the tightening result. For example, when tightening a part with a required torque of 13 NM, a torque detection device can be used to measure the actual torque to see if it reaches 13 NM. At the same time, the installation state of the part is checked to obtain the tightening result of this part, and then the next part is operated in the same way. The tightening results of all tightening points are summarized and analyzed. If the tightening results of all tightening points meet the requirements, the multi-point tightening operation is completed.

[0090] In a feasible implementation manner, before step S40, it may further include: obtaining the current point information and the to-be-tightened point information according to the tightening sequence; when the current point information is different from the to-be-tightened point information, stopping the tightening operation and sending a stop tightening operation prompt.

[0091] It should be noted that the to-be-tightened point information refers to the relevant information of the point where the tightening operation is about to be carried out according to the tightening sequence, and the content is similar to the current point information, covering the position, part model, tightening torque, etc.

[0092] In addition, the stop tightening operation prompt means a reminder signal sent to the operator or automated equipment when the system detects that the current point information is different from the to-be-tightened point information. This prompt can be a visual signal, such as displaying prominent red warning text "Stop tightening operation" on the operation interface; it can also be an auditory signal, such as emitting a loud alarm sound; it can also be a tactile signal, such as the operation handle vibrating, etc.

[0093] It can be understood that the current point information and the to-be-tightened point information are obtained according to the determined tightening sequence. These two sets of obtained information are compared and analyzed. If it is found during the comparison process that the current point information is different from the to-be-tightened point information, the stop mechanism is immediately activated to stop the current tightening operation. At the same time, through the set prompt method, such as turning on the warning light, emitting an alarm sound, etc., a stop tightening operation prompt is sent to the operator or automated equipment to inform that an abnormal situation has occurred and needs to be checked and confirmed.

[0094] In a feasible implementation manner, step S40 may include steps A41 to A45:

[0095] Step A41, obtaining the current point information and the subsequent point information according to the tightening sequence;

[0096] It should be noted that the current point information refers to the relevant information of the point where the tightening operation is about to be carried out when operating in accordance with the tightening sequence. This information includes the position of the point, the corresponding part model, the required tightening torque, etc.

[0097] In addition, the subsequent point information is the relevant information of other points where the tightening operation needs to be carried out after the current point is tightened. It also includes content such as position, part model, and tightening torque. For example, in engine assembly, after a bolt is tightened, the position, the component it belongs to, and the torque requirement of the next bolt or bolts to be tightened are the subsequent point information, which provides guidance for subsequent tightening operations.

[0098] Step A42: Tighten the part according to the current point information to obtain a tightening result.

[0099] It can be understood that based on the current point information, the specific part to be tightened and requirements such as the required tightening torque are determined. The operator or automated equipment uses the selected tool to tighten the part at the current point according to the specified torque value. After the tightening is completed, a tightening result is obtained.

[0100] Step A43: Determine whether there is a tightening failure condition in the tightening result.

[0101] It should be noted that the tightening failure condition refers to various situations that do not meet the tightening requirements during or after the part tightening process. For example, the actual tightening torque does not reach the specified torque value, resulting in an insecure connection of the part; or problems such as the bolt slipping or breaking during the tightening process; there may also be a deviation in the installation position of the part.

[0102] It can be understood that the tightening result is obtained, and according to the pre-set tightening qualification standard, the various indicators in the tightening result are inspected and analyzed. Check whether the torque reaches the specified value, and check whether the part is installed correctly, whether there is looseness or other abnormal phenomena. If any item does not meet the standard, it is determined that there is a tightening failure condition; if all indicators meet the standard, it is determined that there is no tightening failure condition.

[0103] Step A44: When there is a tightening failure condition in the tightening result, obtain the number of failures.

[0104] It should be noted that the number of failures represents the cumulative number of times of tightening failure conditions recorded during the part tightening operation.

[0105] It can be understood that after determining that there is a tightening failure condition in the tightening result, the number of recorded failures is obtained. By counting the number of failures, systematic problems in the tightening process can be detected in a timely manner, so as to adopt targeted solutions to improve production stability and product quality.

[0106] In a feasible implementation manner, after step A44, it may further include: when the number of failures is less than the failure number threshold, tighten the part according to the current point position information and record the tightening result; when the tightening result is a failure, update the number of failures.

[0107] It can be understood that when it is determined that the number of failures is less than the failure number threshold, it means that although there has been a tightening failure before, it has not reached the severity level that requires special treatment measures. At this time, continue to operate on the current point position according to the normal process. According to the current point position information, the operator or automated equipment clarifies the specific part to be tightened and requirements such as the required tightening torque. Tighten the part at the current point position according to the specified operation process and torque value. After completing the tightening, check the tightening result. If the tightening result is qualified, continue to operate on the next point position according to the tightening sequence; if the tightening result is a failure, increase the number of failures by 1 and update the record on the original basis.

[0108] Step A45, when the number of failures is greater than or equal to the failure number threshold, complete multi-point tightening according to the subsequent point position information.

[0109] It should be noted that the failure number threshold is a preset value used to determine whether special treatment measures need to be taken when there is a tightening failure condition. When the number of failures reaches or exceeds this threshold, the corresponding processing flow is triggered. In this embodiment, the failure number threshold is 2 times.

[0110] It can be understood that when the number of failures is greater than or equal to the preset failure number threshold, it means that there are problems with the current tightening operation. Continuing to try to tighten at the current point position may not solve the problem and will waste time. At this time, according to the subsequent point position information obtained in step A41, skip the current problematic point position and directly tighten the subsequent other point positions according to the specified tightening sequence and requirements until all the point positions that need to be tightened are completed, that is, complete multi-point tightening.

[0111] In a feasible implementation manner, step A45 may include steps A451 to A453:

[0112] Step A451, when the number of failures is greater than or equal to the failure number threshold, determine whether the subsequent point position is the target point position according to the subsequent point position information;

[0113] It should be noted that the target point represents a specific point where the tightening operation needs to be completed last in the entire tightening operation process.

[0114] It can be understood that when it is known from the previous steps that the number of failures has reached or exceeded the pre-set failure threshold, the normal operation cannot be continued at the current point. At this time, based on the obtained subsequent point information, it is judged whether the point where the tightening operation is to be carried out next is the specific point where the tightening operation needs to be completed last.

[0115] Step A452, when the subsequent point is not the target point, determine whether the tightening coordinates match according to the subsequent point information;

[0116] It should be noted that the tightening coordinates are a set of data that quantitatively represent the position of the tightening point in a specific coordinate system. Each tightening point has a corresponding coordinate value, which is used to accurately determine the relative position between the tool and the tightening point.

[0117] It can be understood that after judging that the subsequent point is not the target point, according to the tightening coordinate-related data included in the subsequent point information, it is compared with the current actual coordinates of the tool or with the standard coordinates required for the tightening operation. Extract the tightening coordinates from the subsequent point information, and at the same time obtain the current position coordinates of the tool. Compare the two to judge whether they match.

[0118] Step A453, when the tightening coordinates match, tighten the part according to the subsequent point information, update the tightening result, and complete the multi-point tightening according to the updated tightening result.

[0119] It can be understood that when it is determined that the tightening coordinates match, according to the requirements such as the part model and tightening torque specified in the subsequent point information, select a suitable tightening tool. The operator or automated equipment uses this tool to tighten the part at the subsequent point, apply torque according to the specified torque value, so that the part reaches the specified tightening degree. After the tightening operation is completed, check the tightening result, measure the actual torque with a torque detection device, check whether the part is installed in place and whether there is looseness, etc., so as to update the tightening result. Integrate and analyze the updated tightening result with the previous tightening result to judge whether all the points that need to be tightened have been completed and meet the requirements. If there are still other uncompleted points, continue to perform the same operation on the next point according to the tightening sequence and the subsequent point information until the tightening of all points is completed, realizing multi-point tightening.

[0120] This embodiment provides a multi-point tightening method for vehicle parts. By adopting the technical means of a spatial vision positioning system combined with accurate tightening point positions and torque information, it solves the technical problems of incorrect tightening sequence, inaccurate torque, and unstable assembly quality caused by human operation errors in the traditional automobile assembly process. The precise coordinates of the tightening points are determined by the positioning device and fed back to the vision server, and then the vision server controls the tightening tool to operate according to the preset tightening sequence and torque requirements, ensuring the accuracy and reliability of the tightening operation. In addition, by real-time monitoring the tightening results and performing multi-point tightening based on the results, the production efficiency and product quality are further improved, the rework and maintenance costs are reduced, and the beneficial effects of improving the automation level of the automobile assembly line and reducing the production cost are achieved.

[0121] Based on the first embodiment of this application, in the second embodiment of this application, the same or similar content as in the above-mentioned first embodiment can be referred to the above introduction and will not be repeated hereinafter. On this basis, please refer to Figure 3 , after step S40, the multi-point tightening method for the vehicle parts further includes steps S50 to S70:

[0122] Step S50, when there are failed points in the multi-point tightening result, obtain the information of the failed points;

[0123] It should be noted that a failed point refers to a point that fails to meet the specified tightening requirements during the multi-point tightening operation. For example, if the tightening torque of a certain bolt does not reach the design standard, or there is looseness after tightening, the point where the bolt is located is a failed point. The information of the failed points includes detailed data such as the specific position of the failed points, the corresponding part model, the tightening process requirements, and the actual tightening situation.

[0124] It can be understood that when there are failed points in the multi-point tightening result, obtaining the information of the failed points includes the position, tightening parameters, etc.

[0125] Step S60, perform repair based on the information of the failed points to obtain a repair result;

[0126] It should be noted that the repair result refers to the result of whether the point has met the tightening requirements after performing the repair operation on the failed point. For example, after repair, if the tightening torque of the bolt reaches the design standard and the connection is firm, the repair result is qualified; otherwise, if there are still problems, the repair result is unqualified.

[0127] It is understandable that a corresponding repair plan is formulated according to the failure point information. If the tightening torque is insufficient, a suitable tool may be used to tighten it again; if there is a problem with the part itself, the part may need to be replaced. During the repair process, the tightening situation will be detected again to ensure that the specified requirements are met.

[0128] Step S70, update the multi-point tightening result according to the repair result, and complete the vehicle part tightening process according to the updated multi-point tightening result.

[0129] It is understandable that the multi-point tightening result is updated according to the repair result. If the repair result is qualified, the status of this point is marked as successful; if the repair result is still unqualified, it may be necessary to further analyze the reason and repair it again. After the update is completed, check the updated multi-point tightening result to ensure that all points have reached the tightening requirements. If all points are qualified, the vehicle part tightening process is completed; if there are still unqualified points, continue to repair until all points are qualified.

[0130] This embodiment provides a multi-point tightening method for vehicle parts. By means of identifying, repairing, and updating the results of failure points during the multi-point tightening process, it solves the technical problems of quality problems and high rework rates caused by unqualified tightening during large-scale automobile assembly. By accurately obtaining the failure point information, targeted repair operations are carried out, and the tightening result is updated according to the repair result, ensuring that each tightening point can meet the specified process requirements. It not only improves the accuracy and reliability of the tightening operation, but also optimizes the efficiency of the assembly line, reduces vehicle recalls and maintenance costs caused by tightening problems, and achieves the beneficial effects of improving product quality and reducing production costs.

[0131] Exemplarily, to help understand the implementation process of the multi-point tightening method for vehicle parts obtained by combining the above Embodiment 1, please refer to Figure 4 , Figure 4 A brief flow schematic diagram of a multi-point tightening method for vehicle parts is provided. Specifically:

[0132] After the vehicle enters the tightening station, the tool and the error prevention system are triggered, and then the tightening is carried out in sequence. If the tool cannot rotate or cannot be tightened, an alarm and line stop operation are performed at this time; if it can be tightened normally, the tightening result is obtained after normal tightening. If the tightening result is that the vehicle part tightening process is completed, the next vehicle enters the tightening station; if the tightening result is that the tightening operation is not completed, it is judged whether there are 2 consecutive failures. If so, it is abandoned currently. If not, it is judged whether it is the last tightening point. If it is not the last tightening point, it is judged whether the tightening coordinates match, and subsequent operations are continued according to different results. If it is the last tightening point, corresponding processing is also carried out according to whether the tightening coordinates match and other situations.

[0133] It should be noted that the above examples are only for understanding the present application and do not constitute a limitation on the multi-point tightening method of the vehicle parts of the present application. Based on this technical concept, more forms of simple transformation are within the protection scope of the present application.

[0134] The present application also provides a multi-point tightening device for vehicle parts. Please refer to Figure 5 , and the multi-point tightening device for vehicle parts includes:

[0135] An information acquisition module 10, configured to acquire the tightening point position and the tightening point torque when the vehicle enters the tightening station;

[0136] A coordinate determination module 20, configured to send the tightening point position to a positioning device, so that the positioning device determines the tightening point coordinates based on the tightening point position and feeds back;

[0137] A sequence setting module 30, configured to set the tightening sequence according to the tightening point coordinates and the tightening point torque;

[0138] A part tightening module 40, configured to tighten the part according to the tightening sequence to obtain a tightening result, and complete multi-point tightening according to the tightening result.

[0139] The multi-point tightening device for vehicle parts provided by the present application adopts the multi-point tightening method of the vehicle parts in the above embodiment, and can solve the technical problem of how to prevent the wrong tightening caused by the wrong tightening sequence of the operator in the case where the standard part bolt sizes are the same but the torques are different. Compared with the prior art, the beneficial effects of the multi-point tightening device for vehicle parts provided by the present application are the same as those of the multi-point tightening method of the vehicle parts provided in the above embodiment, and other technical features in the multi-point tightening device for vehicle parts are the same as the features disclosed in the above embodiment method, and will not be elaborated herein.

[0140] In one embodiment, the part tightening module 40 is further configured to obtain the current point information and the subsequent point information according to the tightening sequence; tighten the part according to the current point information to obtain a tightening result; determine whether there is a tightening failure condition in the tightening result; when there is a tightening failure condition in the tightening result, obtain the failure times; when the failure times are greater than or equal to the failure times threshold, complete multi-point tightening according to the subsequent point information.

[0141] In one embodiment, the component tightening module 40 is further configured to determine whether a subsequent point is a target point according to the subsequent point information when the number of failures is greater than or equal to a failure number threshold; when the subsequent point is not the target point, determine whether the tightening coordinates match according to the subsequent point information; when the tightening coordinates match, tighten the component according to the subsequent point information, update the tightening result, and complete multi-point tightening according to the updated tightening result.

[0142] In one embodiment, the component tightening module 40 is further configured to tighten the component according to the current point information and record the tightening result when the number of failures is less than the failure number threshold; when the tightening result is a failure, update the number of failures.

[0143] In one embodiment, the component tightening module 40 is further configured to obtain the current point information and the point information to be tightened according to the tightening sequence; when the current point information is different from the point information to be tightened, stop the tightening operation and issue a stop tightening operation prompt.

[0144] In one embodiment, the coordinate determination module 20 is further configured to send the tightening point position to the positioning device so that the positioning device determines the positioning origin based on the tightening point position and feeds it back; determine the positioning coordinate system according to the positioning origin; send the positioning coordinate system to the positioning device so that the positioning device determines the tightening point coordinates based on the positioning coordinate system and the tightening point position and feeds them back.

[0145] In one embodiment, the component tightening module 40 is further configured to obtain the failure point information when there is a failure point in the multi-point tightening result; perform repair according to the failure point information to obtain a repair result; update the multi-point tightening result according to the repair result, and complete the vehicle component tightening process according to the updated multi-point tightening result.

[0146] The present application provides a multi-point tightening device for vehicle components. The multi-point tightening device for vehicle components includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the multi-point tightening method for vehicle components in the first embodiment above.

[0147] Refer to the following Figure 6, which shows a schematic structural diagram of a multi-point tightening device for vehicle parts suitable for implementing the embodiments of the present application. The multi-point tightening device for vehicle parts in the embodiments of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistant), PADs (Portable Application Description), PMPs (Portable Media Player), in-vehicle terminals (such as in-vehicle navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The multi-point tightening device for vehicle parts shown is merely an example and should not impose any limitations on the functions and usage scope of the embodiments of the present application.

[0148] As Figure 6 shown, the multi-point tightening device for vehicle parts may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to the program stored in the ROM (Read Only Memory) 1002 or the program loaded from the storage device 1003 into the RAM (Random Access Memory) 1004. In the RAM 1004, various programs and data required for the operation of the multi-point tightening device for vehicle parts are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems may be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the multi-point tightening device for vehicle parts to communicate with other devices wirelessly or wiredly to exchange data. Although the figure shows a multi-point tightening device for vehicle parts with various systems, it should be understood that it is not required to implement or have all the shown systems. More or fewer systems may be alternatively implemented or had.

[0149] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product that includes a computer program carried on a computer-readable medium, and the computer program contains program codes for executing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by a processing device 1001, the above functions defined in the methods of the embodiments disclosed in the present application are executed.

[0150] The multi-point tightening device for vehicle parts provided by the present application adopts the multi-point tightening method for vehicle parts in the above embodiments, and can solve the technical problem of how to prevent mis-tightening caused by incorrect tightening order of operators in the case where the sizes of standard bolts are the same but the torques are different. Compared with the prior art, the beneficial effects of the multi-point tightening device for vehicle parts provided by the present application are the same as those of the multi-point tightening method for vehicle parts provided in the above embodiments, and other technical features in the multi-point tightening device for vehicle parts are the same as the features disclosed in the method of the previous embodiment, and will not be elaborated here.

[0151] It should be understood that each part disclosed in the present application can be implemented by hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0152] As described above, only the specific embodiments of the present application are provided, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

[0153] The present application provides a computer-readable storage medium having computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the multi-point tightening method for vehicle parts in the above embodiments.

[0154] The computer-readable storage medium provided by this application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or components, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, RAM (Random Access Memory), ROM (Read Only Memory), erasable programmable read-only memory (EPROM or flash memory), optical fibers, CD-ROM (CD-Read Only Memory, portable compact disk read-only memory), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium can be any tangible medium that contains or stores a program, which can be used by or in conjunction with an instruction execution system, device, or component. The program code contained on the computer-readable storage medium can be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0155] The above computer-readable storage medium can be included in the multi-point tightening device of vehicle parts; it can also exist independently without being assembled into the multi-point tightening device of vehicle parts.

[0156] The above computer-readable storage medium carries one or more programs. When the one or more programs are executed by the multi-point tightening device of vehicle parts, the multi-point tightening device of vehicle parts is enabled to: when the vehicle enters the tightening station, obtain the tightening point position and tightening point torque; send the tightening point position to the positioning device so that the positioning device determines the tightening point coordinates based on the tightening point position and feeds back; set the tightening sequence according to the tightening point coordinates and the tightening point torque; perform part tightening according to the tightening sequence to obtain a tightening result, and complete multi-point tightening according to the tightening result.

[0157] Computer program code for performing the operations of this application can be written in one or more programming languages or combinations thereof. The above-mentioned programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a LAN (Local Area Network) or a WAN (Wide Area Network), or it can be connected to an external computer (for example, by connecting through an Internet service provider using the Internet).

[0158] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutively represented blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0159] The modules described in the embodiments of this application can be implemented in software or in hardware. Among them, the name of the module does not constitute a limitation to the unit itself in some cases.

[0160] The readable storage medium provided in this application is a computer-readable storage medium. The computer-readable storage medium stores computer-readable program instructions (i.e., computer programs) for performing the above-mentioned multi-point tightening method for vehicle parts, and can solve the technical problem of how to prevent mis-tightening caused by incorrect tightening order of operators in the case where the standard part bolts have the same size but different torques. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the multi-point tightening method for vehicle parts provided in the above embodiments, and will not be elaborated here.

[0161] The present application also provides a computer program product, including a computer program which, when executed by a processor, implements the steps of the multi-point tightening method for vehicle parts as described above.

[0162] The computer program product provided by the present application can solve the technical problem of how to prevent mis-tightening caused by incorrect tightening sequence of operators in the case where the standard bolt sizes are the same but the torques are different. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as those of the multi-point tightening method for vehicle parts provided by the above embodiments, and will not be elaborated here.

[0163] The above are only some embodiments of the present application, and thus do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A multi-point tightening method for vehicle parts, characterized in that, The method is applied to a vision server of a spatial vision positioning system. The spatial vision positioning system includes a vision server and a positioning device. The method includes: When the vehicle enters the tightening station, obtain the tightening point position and the tightening point torque; Send the tightening point position to the positioning device so that the positioning device determines the tightening point coordinates based on the tightening point position and gives feedback; Set the tightening sequence according to the tightening point coordinates and the tightening point torque; Perform part tightening according to the tightening sequence to obtain a tightening result, and complete multi-point tightening according to the tightening result.

2. The method according to claim 1, characterized in that, The step of performing part tightening according to the tightening sequence to obtain a tightening result and completing multi-point tightening according to the tightening result includes: Obtain the current point information and the subsequent point information according to the tightening sequence; Perform part tightening according to the current point information to obtain a tightening result; Determine whether there is a tightening failure condition in the tightening result; When there is a tightening failure condition in the tightening result, obtain the failure times; When the failure times are greater than or equal to the failure times threshold, complete multi-point tightening according to the subsequent point information.

3. The method according to claim 2, wherein The step of, when the failure times are greater than or equal to the failure times threshold, completing multi-point tightening according to the subsequent point information includes: When the failure times are greater than or equal to the failure times threshold, determine whether the subsequent point is the target point according to the subsequent point information; When the subsequent point is not the target point, determine whether the tightening coordinates match according to the subsequent point information; When the tightening coordinates match, perform part tightening according to the subsequent point information, update the tightening result, and complete multi-point tightening according to the updated tightening result.

4. The method according to claim 2, wherein After the step of, when there is a tightening failure condition in the tightening result, obtaining the failure times, it further includes: When the failure times are less than the failure times threshold, perform part tightening according to the current point information and record the tightening result; When the tightening result is a failure, update the failure times.

5. The method according to claim 1, wherein Before the step of performing part tightening according to the tightening sequence to obtain a tightening result and completing multi-point tightening according to the tightening result, it further includes: Obtain the current point information and the point-to-be-tightened information according to the tightening sequence; When the current point information and the point-to-be-tightened information are different, stop the tightening operation and issue a stop tightening operation prompt.

6. The method according to claim 1, wherein The step of sending the tightening point position to the positioning device so that the positioning device determines the tightening point coordinates based on the tightening point position and gives feedback includes: Send the tightening point position to the positioning device so that the positioning device determines the positioning origin based on the tightening point position and gives feedback; Determine the positioning coordinate system according to the positioning origin; Send the positioning coordinate system to the positioning device so that the positioning device determines the tightening point coordinates based on the positioning coordinate system and the tightening point position and gives feedback.

7. The method according to claim 1, characterized in that After the step of performing part tightening according to the tightening sequence to obtain a tightening result and completing multi-point tightening according to the tightening result, it further includes: When there is a failed point in the multi-point tightening result, obtain the failed point information; Perform repair according to the failed point information to obtain a repair result; Update the multi-point tightening result according to the repair result, and complete the vehicle part tightening process according to the updated multi-point tightening result.

8. A multi-point tightening device for vehicle parts, characterized in that, The device includes: An information acquisition module, configured to acquire the tightening point position and the tightening point torque when the vehicle enters the tightening station; A coordinate determination module, configured to send the tightening point position to a positioning device, so that the positioning device determines the tightening point coordinates based on the tightening point position and feeds back; A sequence setting module, configured to set the tightening sequence according to the tightening point coordinates and the tightening point torque; A part tightening module, configured to perform part tightening according to the tightening sequence to obtain a tightening result, and complete multi-point tightening according to the tightening result.

9. A multi-point tightening device for vehicle parts, characterized in that, The device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the computer program is configured to implement the steps of the multi-point tightening method for vehicle parts according to any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium, and when the computer program is executed by a processor, it implements the steps of the multi-point tightening method for vehicle parts according to any one of claims 1 to 7.

Images