A method and system for fit welding of an automobile bumper

Abstract

The application relates to a matching welding method and system of an automobile bumper, and relates to the technical field of welding, which comprises the following steps: collecting first vibration detection information of a bumper beam clamp, second vibration detection information of an energy absorption box clamp and welding parameters of a welding device; determining first vibration offset parameters according to the first vibration detection information; determining second vibration offset parameters according to the second vibration detection information; analyzing the first vibration offset parameters and the second vibration offset parameters to determine the relative offset amount of the energy absorption box; based on the welding parameters, calling a welding current position point and a current welding power; combining the welding current position point and the relative offset amount to determine welding offset influence parameters; when and only when the welding offset influence parameters meet a preset moving reference reference value, combining the welding offset influence parameters and the current welding power to determine welding adjustment information, and outputting the welding adjustment information. The application has the effect of improving the welding quality of the energy absorption box and the bumper beam.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a method and system for welding automotive bumpers. Background Technology

[0002] Welding is a permanent metallurgical bonding process that uses heating, pressurization, or both, with the aid of filler material (or without filler material), to form a metallurgical bond between two or more workpieces of the same or different types.

[0003] A car bumper is a safety device that absorbs and mitigates external impacts, protecting the front and rear of the vehicle. It includes components such as a crash beam, energy-absorbing box, cushioning foam, and the outer bumper panel. Currently, the production process for car bumpers generally involves hoisting the crash beam onto a reference positioning platform of a specialized welding fixture. The energy-absorbing box is then attached and fixed to the crash beam using the fixture. Finally, a welding device is used to weld the energy-absorbing box onto the crash beam, thus completing the assembly and installation of the energy-absorbing box and the crash beam.

[0004] Since the energy-absorbing box and the anti-collision beam are clamped and fixed by their respective clamps, vibration is easily generated during the welding process of the energy-absorbing box and the anti-collision beam, which can easily cause slight displacement of the energy-absorbing box or the anti-collision beam, thus reducing the welding quality. Summary of the Invention

[0005] To improve the welding quality of the energy-absorbing box and the anti-collision beam, this invention provides a welding method and system for the assembly of an automobile bumper.

[0006] In a first aspect, the present invention provides a method for welding a car bumper, employing the following technical solution:

[0007] A method for welding a car bumper together, comprising:

[0008] S1: Collect the first vibration detection information of the anti-collision beam fixture, the second vibration detection information of the energy-absorbing box fixture, and the welding parameters of the welding device;

[0009] S2: Determine the first vibration offset parameter based on the first vibration detection information;

[0010] S3: Determine the second vibration offset parameter based on the second vibration detection information;

[0011] S4: Analyze the first vibration offset parameter and the second vibration offset parameter to determine the relative offset of the energy absorption box;

[0012] S5: Retrieve the current welding position and current welding power based on welding parameters;

[0013] S6: Determine the welding offset influence parameters by combining the current welding position point and the relative offset;

[0014] S7: If and only if the welding offset influence parameter meets the preset moving reference value, combine the welding offset influence parameter with the current welding power to determine the welding adjustment information and output the welding adjustment information;

[0015] Methods for determining relative offset include:

[0016] S41: Retrieve the first offset direction and the first offset distance value based on the first vibration offset parameter;

[0017] S42: Retrieve the second offset direction and the second offset distance value based on the second vibration offset parameter;

[0018] S43: Calculate the angle between the first offset direction and the second offset direction and use it as the offset deviation angle value;

[0019] S44: Determine the offset reference angle range by combining the first offset direction with the preset offset influence reference direction;

[0020] S45: Determine whether the offset deviation angle value is within the offset reference angle range;

[0021] S46: If yes, then the initial offset is determined by combining the first vibration offset parameter and the second vibration offset parameter, and the initial offset is used as the relative offset.

[0022] S47: If not, then determine the offset angle influence value by combining the first offset direction, the second offset direction and the preset offset influence reference direction;

[0023] S48: Combine the first offset distance value, the second offset distance value, and the offset angle influence value to determine the adjustment offset amount, and use the adjustment offset amount as the relative offset amount.

[0024] By adopting the above technical solution, the first vibration offset parameter and the second vibration offset parameter are determined by collecting the first vibration detection information, the second vibration detection information and the welding parameters, and then the relative offset of the energy-absorbing box is obtained. Then, the current welding position point and the current welding power are retrieved by the welding parameters and analyzed. The welding adjustment information is determined and output only when the welding offset influence parameter meets the preset moving reference value. This realizes real-time monitoring and dynamic adjustment of vibration offset during the welding process, effectively avoids welding position deviation caused by vibration offset, ensures the welding fit accuracy between the energy-absorbing box and the anti-collision beam, and improves the welding quality of the energy-absorbing box and the anti-collision beam. Furthermore, by retrieving the first offset direction and the first offset distance value, and the second offset direction and the second offset distance value, the offset deviation angle value and the offset reference angle range are calculated. Then, it is determined whether the offset deviation angle value is within the offset reference angle range. When the offset deviation angle value is within the reference range, the initial offset amount is directly determined by the first vibration offset parameter and the second vibration offset parameter. When it exceeds the reference range, the offset angle influence value is determined and combined with the first offset distance value and the second offset distance value to obtain the adjustment offset amount. Then, the initial offset amount or the adjustment offset amount is used as the relative offset amount, so as to more reasonably reflect the corresponding relative offset amount under different vibration conditions and ensure the accuracy of welding fit.

[0025] Optionally, methods for determining the influence value of the offset angle include:

[0026] S471: Determine the first reference angle value by combining the first offset direction with the preset offset influence reference direction;

[0027] S472: Determine the second reference angle value by combining the second offset direction with the preset offset influence reference direction;

[0028] S473: Determine whether the first reference angle value is greater than the second reference angle value;

[0029] S474: If yes, then determine the first angle influence value based on the first reference angle value, and use the first angle influence value as the offset angle influence value;

[0030] S475: If not, determine the second angle influence value based on the second reference angle value, and use the second angle influence value as the offset angle influence value.

[0031] By adopting the above technical solution, the first reference angle value and the second reference angle value are determined, and then it is judged whether the first reference angle value is greater than the second reference angle value. When it is greater, the first angle influence value is determined by the first reference angle value and used as the offset angle influence value. When it is not greater, the first angle influence value is determined by the second reference angle value and used as the offset angle influence value. In this way, the influence of the component with a larger deviation between the vibration direction and the reference direction is given priority, thereby further improving the rationality and accuracy of the relative offset calculation.

[0032] Optionally, methods for determining the adjustment offset include:

[0033] S481: Determine whether the offset angle influence value is the first angle influence value;

[0034] S482: If yes, calculate the product between the first angle influence value and the first offset distance value and use it as the first adjustment distance value;

[0035] S483: Combine the first adjustment distance value, the first offset direction and the second vibration offset parameter to determine the first adjustment offset amount, and use the first adjustment offset amount as the adjustment offset amount;

[0036] S484: If not, calculate the product between the second angle influence value and the second offset distance value and use it as the second adjustment distance value;

[0037] S485: Combine the second adjustment distance value, the second offset direction and the first vibration offset parameter to determine the second offset amount, and use the second offset amount as the adjustment offset amount.

[0038] By adopting the above technical solution, it is determined whether the influence value of the offset angle is the first influence value, and then the first adjustment distance value or the second adjustment distance value is determined based on the first angle influence value or the second angle influence value. This enables targeted calculation of the adjustment offset, optimizes the accuracy of the relative offset, and ensures that the welding adjustment information can accurately offset the influence of vibration offset.

[0039] Optionally, methods for determining the parameters affecting welding offset include:

[0040] S61: Collect specifications for the crash beam and energy-absorbing box;

[0041] S62: Determine the welding locations based on the specifications of the anti-collision beam and the energy-absorbing box;

[0042] S63: Determine the reference value for the welding position by combining the current welding position point with the required welding position point;

[0043] S64: Determine the offset reference value based on the relative offset;

[0044] S65: Determine the comprehensive reference value by combining the welding position reference value and the offset reference value;

[0045] S66: The reference composite value and the relative offset are combined and used as the welding offset influence parameter.

[0046] By adopting the above technical solution, the required welding location is determined by collecting the specifications of the anti-collision beam and the energy-absorbing box. The welding position reference value is obtained by combining the current welding position point with the reference value of the relative offset. At the same time, the offset reference value is determined based on the relative offset. The two are integrated to form a comprehensive reference value, which is then used as the welding offset influence parameter after combining with the relative offset. This achieves a comprehensive consideration of the welding position requirements and the influence of vibration offset, avoiding the one-sidedness of adjustment caused by focusing on only a single factor. The welding offset influence parameter can fully reflect the welding working condition, providing a comprehensive and reliable basis for the derivation of welding adjustment information, ensuring the pertinence and effectiveness of welding adjustment, and improving the welding coordination quality.

[0047] Optionally, methods for determining the welding position reference value include:

[0048] S631: The welding demand position point that is consistent with the current welding position point is taken as the real-time position point, and the welding demand position points other than the real-time position point are taken as the remaining position points;

[0049] S632: Determine the remaining offset vector value by combining the real-time location point and the remaining location point;

[0050] S633: Calculate the sum of all remaining offset vector values ​​and use it as the composite offset vector value;

[0051] S634: Determine the offset reference vector parameters based on the remaining offset vector values;

[0052] S635: Combine the offset composite vector value with the offset reference vector parameter to determine the position vector reference value, and use the position vector reference value as the welding position reference value.

[0053] By adopting the above technical solution, the remaining offset vector value is determined by distinguishing between real-time position points and remaining position points. The offset comprehensive vector value is then calculated from the remaining offset vector value, and the offset reference vector parameter is determined. Combined with the determined position vector reference value, which is used as the welding position reference value, the offset correlation of all welding requirement position points is fully considered. This allows the welding position reference value to comprehensively reflect the overall welding offset state, improves the comprehensiveness and accuracy of welding offset influencing parameters, and provides more support data that fits the actual working conditions for subsequent welding adjustments.

[0054] Optionally, methods for determining the offset reference vector parameters include:

[0055] S6341: Retrieve the remaining offset distance value and remaining offset direction based on the remaining offset vector value;

[0056] S6342: Sort the remaining offset distance values ​​from largest to smallest, and select the remaining offset distance value that ranks first as the maximum offset distance value;

[0057] S6343: Retrieve the width and length values ​​of the energy-absorbing box based on its specifications;

[0058] S6344: Determine the width range by combining the width and length values ​​of the energy-absorbing box;

[0059] S6345: The maximum offset distance value is combined with the width direction interval and used as the offset reference vector parameter.

[0060] By adopting the above technical solution, the remaining offset distance value and remaining offset direction are retrieved by the remaining offset vector value, and the maximum offset distance value is selected. The width value and length value of the energy-absorbing box are retrieved by the specifications of the energy-absorbing box, and the width direction range is determined. Then, the maximum offset distance value and the width direction range are combined as the offset reference vector parameters. Thus, the maximum single-step offset that may occur in the future welding path is selected as part of the reference. At the same time, the acceptable range of the width of the energy-absorbing box itself on the welding direction is considered. This makes the determined offset reference vector parameters both representative and in line with the actual structural constraints, making the subsequent calculations more in line with the actual process.

[0061] Optionally, methods for determining the position vector reference value include:

[0062] S6351: Retrieves reference distance value and reference direction range based on offset reference vector parameters;

[0063] S6352: Retrieve composite distance and composite direction based on offset composite vector value;

[0064] S6353: Calculate the difference between the composite distance value and the reference distance value and use it as the distance deviation value;

[0065] S6354: Determine the distance deviation reference value based on the distance deviation value;

[0066] S6355: Determine the reference value for directional deviation by combining the comprehensive directional and the reference directional intervals;

[0067] S6356: Determine a comprehensive reference value based on the distance deviation reference value and the direction deviation reference value, and use the comprehensive reference value as the position vector reference value.

[0068] By adopting the above technical solution, the reference distance value and reference direction range are retrieved by offset reference vector parameters, and then the comprehensive distance value and comprehensive direction are retrieved. The distance deviation value is calculated to determine the distance deviation reference value, and the direction deviation reference value is determined by the comprehensive direction and the reference direction range. Finally, the comprehensive reference value is determined and used as the position vector reference value. This achieves accurate assessment of the offset from both distance and direction dimensions, avoids misjudgment of offset caused by single-dimensional assessment, and improves the comprehensiveness and accuracy of the position vector reference value.

[0069] Optional methods for determining the direction deviation reference value include:

[0070] S63551: Determine whether the composite direction is within the reference direction range;

[0071] S63552: If yes, output the preset direction reference value and use it as the direction deviation reference value;

[0072] S63553: If not, calculate the angle between the integrated direction and the reference direction interval and use it as the direction deviation angle value;

[0073] S63554: Calculate the ratio between the angular deviation values ​​of two directions and use it as the angular ratio value;

[0074] S63555: Determine the angle ratio reference value based on the angle ratio value, and use the angle ratio reference value as the direction deviation reference value.

[0075] By adopting the above technical solution, it is determined whether the comprehensive direction is within the reference direction range. When it is, a preset direction reference value is output and used as the direction deviation reference value. When it is not, the direction deviation angle value is calculated, and then the angle ratio value is calculated to determine the angle ratio reference value and used as the direction deviation reference value. This makes the final direction deviation reference value more sensitive and accurate to direction anomalies.

[0076] Secondly, the present invention provides a welding system for automotive bumpers, employing the following technical solution:

[0077] A mating welding system for an automobile bumper, comprising:

[0078] The data acquisition module is used to collect first vibration detection information, second vibration detection information, welding parameters, anti-collision beam specifications, and energy absorption box specifications.

[0079] The memory stores a program for implementing a method for welding a car bumper as described in any one of the first aspects;

[0080] The processor loads and executes programs stored in memory.

[0081] In summary, the present invention has at least one of the following beneficial technical effects:

[0082] 1. By collecting first vibration detection information, second vibration detection information, and welding parameters, the first vibration offset parameter and the second vibration offset parameter are determined, thereby obtaining the relative offset of the energy-absorbing box; then, by retrieving the current welding position point and current welding power through welding parameters and combining analysis, welding adjustment information is determined and output only when the welding offset influencing parameter meets the preset moving reference value, realizing real-time monitoring and dynamic adjustment of vibration offset during welding, effectively avoiding welding position deviation caused by vibration offset, ensuring the welding fit accuracy between the energy-absorbing box and the anti-collision beam, and improving the welding quality of the energy-absorbing box and the anti-collision beam;

[0083] 2. By retrieving the first offset direction and the first offset distance value, and the second offset direction and the second offset distance value, the offset deviation angle value and the offset reference angle range are calculated. Then, the offset deviation angle value is judged by whether it is within the offset reference angle range. When the offset deviation angle value is within the reference range, the initial offset amount is directly determined by the first vibration offset parameter and the second vibration offset parameter. When it exceeds the reference range, the offset angle influence value is determined and combined with the first offset distance value and the second offset distance value to obtain the adjustment offset amount. Then, the initial offset amount or the adjustment offset amount is used as the relative offset amount, so as to more reasonably reflect the corresponding relative offset amount under different vibration conditions and ensure the accuracy of welding fit.

[0084] 3. By collecting the specifications of the anti-collision beam and the energy-absorbing box, the required welding location is determined. Combined with the current welding location, a welding position reference value is obtained. At the same time, an offset reference value is determined based on the relative offset. The two are integrated to form a comprehensive reference value, which, together with the relative offset, serves as a welding offset influence parameter. This achieves a comprehensive consideration of welding position requirements and vibration offset influence, avoiding the one-sidedness of adjustments caused by focusing on only a single factor. The welding offset influence parameter can comprehensively reflect the welding conditions, providing a comprehensive and reliable basis for the derivation of welding adjustment information, ensuring the pertinence and effectiveness of welding adjustments, and improving the quality of welding coordination. Attached Figure Description

[0085] Figure 1 This is a flowchart of the welding process for car bumpers.

[0086] Figure 2 This is a flowchart illustrating the method for determining the relative offset;

[0087] Figure 3 This is a flowchart illustrating the method for determining the parameters affecting welding offset. Detailed Implementation

[0088] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0089] A method for welding a car bumper involves collecting first vibration detection information, second vibration detection information, welding parameters, anti-collision beam specifications, and energy-absorbing box specifications. First and second vibration offset parameters are determined to calculate the relative offset of the energy-absorbing box. The current welding position is then retrieved, and welding position reference values ​​and offset reference values ​​are determined based on the energy-absorbing box specifications. These are then combined to form welding offset influence parameters. Welding adjustment information is determined and output only when the welding offset influence parameters meet a preset movement reference value. This method enables real-time monitoring and dynamic adjustment of vibration offset during welding, effectively avoiding welding position deviations caused by vibration offset, ensuring the welding fit accuracy between the energy-absorbing box and the anti-collision beam, and improving the welding quality of the energy-absorbing box and the anti-collision beam.

[0090] Reference Figure 1 This invention discloses a method for welding a car bumper, comprising:

[0091] S1: Collect the first vibration detection information of the anti-collision beam fixture, the second vibration detection information of the energy-absorbing box fixture, and the welding parameters of the welding device.

[0092] The first vibration detection information refers to the set of vibration-related data generated by the anti-collision beam fixture during the welding process. The anti-collision beam fixture is the device that clamps the anti-collision beam. The second vibration detection information refers to the set of vibration-related data generated by the energy-absorbing box fixture during the welding process. The energy-absorbing box fixture is the device that clamps the energy-absorbing box.

[0093] The first and second vibration detection information include parameters such as vibration frequency, amplitude, and vibration direction. The first vibration detection information is obtained through a vibration sensor pre-installed on the anti-collision beam fixture. The second vibration detection information is obtained through a vibration sensor pre-installed on the energy-absorbing box fixture.

[0094] Welding parameters refer to the process settings data required for welding equipment to perform welding operations. Welding parameters include parameters such as welding current, voltage, and the corresponding welding position.

[0095] S2: Determine the first vibration offset parameter based on the first vibration detection information.

[0096] The first vibration offset parameter refers to the set of parameters used to characterize the positioning offset characteristics caused by the vibration of the anti-collision beam clamp. The first vibration offset parameter includes the offset direction and the offset distance.

[0097] By retrieving raw data such as vibration frequency, dynamic amplitude, and vibration direction from the first vibration detection information, and using vibration signal processing algorithms (such as Fourier transform and time-domain integration) to denoise the raw data and remove invalid signals such as equipment operation and environmental interference, a three-dimensional coordinate system is established with the positioning reference point of the anti-collision beam fixture as the origin. By performing a second time-domain integration on the acceleration signal, the real-time displacement of the fixture during the welding process is calculated to obtain the offset distance. At the same time, the offset direction is determined by combining the vector data of the vibration direction, and the offset distance and offset direction are combined as the first vibration offset parameter.

[0098] S3: Determine the second vibration offset parameter based on the second vibration detection information.

[0099] The second vibration offset parameter refers to the set of parameters used to characterize the positioning offset characteristics caused by the vibration of the energy-absorbing box fixture. The second vibration offset parameter includes the offset direction and the offset distance.

[0100] The second vibration offset parameter is determined by analyzing it using the same method as S2, which facilitates its subsequent use.

[0101] S4: Analyze the first vibration offset parameter and the second vibration offset parameter to determine the relative offset of the energy absorption box.

[0102] The relative offset is a quantitative indicator that represents the degree of displacement of the energy-absorbing box relative to the crash beam. The relative offset includes the offset distance and the offset direction.

[0103] By analyzing the first and second vibration offset parameters, the relative offset can be determined, which facilitates subsequent use.

[0104] To further ensure the reasonableness of the relative offset, it is necessary to perform a further separate analysis and calculation of the relative offset, which will be explained in detail through the steps shown below.

[0105] Reference Figure 2 The method for determining the relative offset includes the following steps:

[0106] S41: Retrieve the first offset direction and the first offset distance value based on the first vibration offset parameter.

[0107] Here, the first offset direction refers to the direction corresponding to the positioning offset caused by the vibration of the anti-collision beam clamp. The first offset distance value refers to the distance value corresponding to the positioning offset caused by the vibration of the anti-collision beam clamp. The first vibration offset parameter includes the first offset direction and the first offset distance value.

[0108] The first offset direction and the first offset distance value are retrieved by using the first vibration offset parameter, which facilitates subsequent use.

[0109] S42: Retrieve the second offset direction and the second offset distance value based on the second vibration offset parameter.

[0110] The second offset direction refers to the direction corresponding to the positioning offset caused by the vibration of the energy-absorbing box fixture. The second offset distance value refers to the distance value corresponding to the positioning offset caused by the vibration of the energy-absorbing box fixture. The second vibration offset parameters include the second offset direction and the second offset distance value.

[0111] The second vibration offset parameter is used to retrieve the second offset direction and the second offset distance value for convenient subsequent use.

[0112] S43: Calculate the angle between the first offset direction and the second offset direction and use it as the offset deviation angle value.

[0113] The offset deviation angle value refers to the angle between the first offset direction and the second offset direction in a clockwise direction.

[0114] The offset deviation angle value is calculated to facilitate subsequent use.

[0115] S44: Determine the offset reference angle range by combining the first offset direction with the preset offset influence reference direction.

[0116] The offset influence reference direction refers to the reference direction set in advance based on the welding positioning requirements of the energy-absorbing box and the anti-collision beam, as well as the tooling design reference. The offset influence reference direction is obtained through pre-input by the operator. Generally, two offset influence reference directions are set.

[0117] The offset reference angle range refers to the range of angles between the first offset direction and the two offset influence reference directions in a clockwise direction.

[0118] The angle between the first offset direction and the preset offset influence reference direction is calculated to facilitate subsequent use.

[0119] In this embodiment, the offset influence reference directions are set to two directions that are consistent with the axis of the anti-collision beam but opposite to it. By calculating the angle between the first offset direction and the two offset influence reference directions, and using the calculation results as the endpoints of the offset reference angle interval, an offset reference angle interval is formed for convenient subsequent use.

[0120] S45: Determine whether the offset deviation angle value is within the offset reference angle range. If yes, proceed to S46; if no, proceed to S47.

[0121] Specifically, the method involves determining whether the offset deviation angle value is within the offset reference angle range to determine whether the deviation direction is too large.

[0122] S46: Determine the initial offset by combining the first vibration offset parameter and the second vibration offset parameter, and use the initial offset as the relative offset.

[0123] The initial offset refers to the quantitative index of the initial offset of the energy-absorbing box relative to the anti-collision beam.

[0124] When the offset deviation angle value is within the offset reference angle range, it indicates that the deviation direction meets the requirements. Therefore, a two-dimensional coordinate system is established with the anti-collision beam fixture positioning reference point as the origin. The first vibration offset parameter and the second vibration offset parameter are used as two vectors to calculate the sum, thereby obtaining the distance and direction of the comprehensive offset, which is used as the initial offset. The initial offset is then used as the relative offset to improve the accuracy of the obtained relative offset.

[0125] S47: Determine the offset angle influence value by combining the first offset direction, the second offset direction and the preset offset influence reference direction.

[0126] Among them, the offset angle influence value refers to the influence value corresponding to the distance adjustment when the offset angle between the energy absorption box and the anti-collision beam is too large.

[0127] When the offset deviation angle value is not within the offset reference angle range, it indicates that the deviation direction is too large. Therefore, by combining the analysis of the first offset direction, the second offset direction and the preset offset influence reference direction, the offset angle influence value can be determined for subsequent use.

[0128] To further ensure the rationality of the offset angle influence value, it is necessary to perform a further separate analysis and calculation of the offset angle influence value, which will be explained in detail through the steps shown below.

[0129] The method for determining the influence value of the offset angle includes the following steps:

[0130] S471: Determine the first reference angle value by combining the first offset direction with the preset offset influence reference direction.

[0131] The first reference angle value refers to the angle between the first offset direction and the offset influence reference direction.

[0132] The angle between the first offset direction and the preset offset influence reference direction is calculated and used as the first reference angle value for convenient subsequent use.

[0133] S472: Determine the second reference angle value by combining the second offset direction with the preset offset influence reference direction.

[0134] The second reference angle value refers to the angle between the second offset direction and the offset influence reference direction.

[0135] The angle between the second offset direction and the preset offset influence reference direction is calculated and used as the second reference angle value for convenient subsequent use.

[0136] S473: Determine whether the first reference angle value is greater than the second reference angle value. If yes, proceed to S474; if no, proceed to S475.

[0137] Specifically, by determining whether the first reference angle value is greater than the second reference angle value, it is determined whether the first offset distance value needs to be adjusted.

[0138] S474: Determine the first angle influence value based on the first reference angle value, and use the first angle influence value as the offset angle influence value.

[0139] The first angle influence value refers to the adjustment value corresponding to the distance adjustment based on the first reference angle value.

[0140] The smaller the first reference angle value, the closer the first angle influence value is to 1; the larger the first reference angle value, the less the first angle influence value is to 1.

[0141] When the first reference angle value is greater than the second reference angle value, it indicates that the first offset distance value needs to be adjusted. Therefore, by inputting the first reference angle value into the preset angle influence database to obtain the first angle influence value, and using the first angle influence value as the offset angle influence value, the accuracy of the obtained offset angle influence value is improved.

[0142] The angle influence database pre-stores different angle values ​​and their corresponding angle influence values, and is obtained after the operator pre-inputs the values.

[0143] S475: Determine the second angle influence value based on the second reference angle value, and use the second angle influence value as the offset angle influence value.

[0144] The second angle influence value refers to the adjustment value corresponding to the distance adjustment based on the second reference angle value.

[0145] When the first reference angle value is not greater than the second reference angle value, it indicates that the second offset distance value needs to be adjusted. Therefore, by inputting the second reference angle value into the preset angle influence database to obtain the second angle influence value, and using the second angle influence value as the offset angle influence value, the accuracy of the obtained offset angle influence value is improved.

[0146] S48: Combine the first offset distance value, the second offset distance value, and the offset angle influence value to determine the adjustment offset amount, and use the adjustment offset amount as the relative offset amount.

[0147] Among them, the adjustment offset refers to the quantitative index of the offset of the energy-absorbing box relative to the anti-collision beam after adjustment.

[0148] By combining the first offset distance value, the second offset distance value, and the offset angle influence value, the adjustment offset is determined, and the adjustment offset is used as the relative offset to improve the accuracy of the obtained relative offset.

[0149] To further ensure the rationality of the adjustment offset, it is necessary to perform a further separate analysis and calculation of the adjustment offset, which will be explained in detail through the steps shown below.

[0150] The method for determining the offset adjustment includes the following steps:

[0151] S481: Determine whether the offset angle influence value is the first angle influence value. If yes, execute S482; if no, execute S484.

[0152] Specifically, by determining whether the influence value of the offset angle is the same as the influence value of the first angle, it can be determined whether the first offset distance value needs to be adjusted.

[0153] S482: Calculate the product between the first angle influence value and the first offset distance value and use it as the first adjustment distance value.

[0154] The first adjustment distance value refers to the distance value after adjusting the first offset distance value.

[0155] When the offset angle influence value is the first angle influence value, it means that the first offset distance value needs to be adjusted. Therefore, the product value between the first angle influence value and the first offset distance value is calculated, and the calculation result is used as the first adjustment distance value for convenient use later.

[0156] S483: Combine the first adjustment distance value, the first offset direction and the second vibration offset parameter to determine the first adjustment offset amount, and use the first adjustment offset amount as the adjustment offset amount.

[0157] Among them, adjusting the first offset refers to the offset quantification index determined based on the first adjustment distance value.

[0158] By combining the first adjustment distance value and the first offset direction to update the first vibration offset parameter, and then using the updated first vibration offset parameter and the second vibration offset parameter as two vectors to calculate the sum, the first adjustment offset amount is obtained, and the first adjustment offset amount is used as the adjustment offset amount, thereby improving the accuracy of the obtained adjustment offset amount.

[0159] S484: Calculate the product between the second angle influence value and the second offset distance value and use it as the second adjustment distance value.

[0160] The second adjustment distance value refers to the distance value after adjusting the second offset distance value.

[0161] When the offset angle influence value is not the first angle influence value, it means that the second offset distance value needs to be adjusted. Therefore, the product value between the second angle influence value and the second offset distance value is calculated, and the calculation result is used as the second adjustment distance value for convenient use later.

[0162] S485: Combine the second adjustment distance value, the second offset direction and the first vibration offset parameter to determine the second offset amount, and use the second offset amount as the adjustment offset amount.

[0163] Among them, the adjustment of the second offset refers to the offset quantification index determined based on the second adjustment distance value.

[0164] By combining the second adjustment distance value and the second offset direction to update the second vibration offset parameter, and then using the updated second vibration offset parameter and the first vibration offset parameter as two vectors to calculate the sum, the second adjustment offset amount is obtained. The second adjustment offset amount is then used as the adjustment offset amount, thereby improving the accuracy of the obtained adjustment offset amount.

[0165] S5: Retrieve the current welding position and current welding power based on welding parameters.

[0166] Here, "current welding position" refers to the position that the welding device needs to weld at the current time when performing the welding operation. "Current welding power" refers to the power used by the welding device at the current time when performing the welding operation. Welding parameters include the current welding position and the current welding power.

[0167] The welding parameters can be retrieved to determine the current welding position and power for convenient subsequent use.

[0168] S6: Determine the welding offset influence parameters by combining the current welding position point and the relative offset.

[0169] Among them, the welding offset influence parameter refers to the comprehensive parameter that needs to be adjusted after the vibration offset affects the welding point accuracy of the energy absorption box and the anti-collision beam.

[0170] By combining the analysis of the current welding position and the relative offset, the parameters affecting welding offset can be determined, which will facilitate subsequent use.

[0171] To further ensure the rationality of the welding offset influence parameters, it is necessary to perform further separate analysis and calculation on the welding offset influence parameters, which will be explained in detail through the following steps.

[0172] Reference Figure 3 The method for determining the parameters affecting welding offset includes the following steps:

[0173] S61: Collect the specifications of the anti-collision beam and the energy-absorbing box.

[0174] The specifications for crash beams refer to a set of technical parameters characterizing their structural features, material properties, and assembly compatibility. These specifications include key indicators such as length, width, thickness, cross-sectional shape, material grade, weld end face flatness tolerance, and coordinates and dimensions of reference holes. Similarly, the specifications for energy-absorbing boxes define their structural parameters, performance indicators, and assembly compatibility. These specifications include key indicators such as length, flange dimensions, number and spacing of crumple zones, wall thickness, material grade, and dimensions and positional tolerances of mounting holes.

[0175] The specifications of the crash beam and energy-absorbing box are obtained after being pre-entered by the operator.

[0176] S62: Determine the welding locations based on the specifications of the anti-collision beam and the energy-absorbing box.

[0177] Among them, the welding requirement location point refers to the location point corresponding to the optimal welding point between the pre-calibrated energy-absorbing box and the anti-collision beam.

[0178] By retrieving core parameters from the specifications of the crash beam (welding end face dimensions, reference hole coordinates, cross-sectional shape) and the energy-absorbing box (flange dimensions, mounting hole position accuracy, and contact area range), and then using CAD 3D modeling software to simulate the assembly of the energy-absorbing box and the crash beam, the effective contact area between the two was determined. Subsequently, combining the results of the collision mechanics simulation (such as the stress distribution of the force transmission path) and welding process specifications (such as the spot weld spacing not less than 3 times the weld diameter and the weld length not less than 5 times the workpiece wall thickness), the number and distribution of welding points within the effective contact area were planned. Finally, through coordinate conversion, the relative coordinates of the welding points were converted into absolute coordinates with the crash beam fixture positioning reference as the origin, thus obtaining the required welding positions.

[0179] S63: Determine the reference value for the welding position by combining the current welding position point with the required welding position point.

[0180] Among them, the welding position reference value refers to a quantitative indicator that characterizes the importance of the current welding position point in the overall position that needs to be welded.

[0181] By combining the current welding position with the required welding position, a welding position reference value is determined, which facilitates subsequent use.

[0182] To further ensure the rationality of the welding position reference value, it is necessary to perform a further separate analysis and calculation on the welding position reference value, which will be explained in detail through the steps shown below.

[0183] The method for determining the reference value for the welding position includes the following steps:

[0184] S631: The welding requirement position point that is consistent with the current welding position point is taken as the real-time position point, and the welding requirement position points other than the real-time position point are taken as the remaining position points.

[0185] The real-time position point refers to the welding requirement position point corresponding to the current welding operation. The remaining position points refer to welding requirement position points other than the current welding operation.

[0186] Defining the real-time location points and the remaining location points facilitates subsequent use.

[0187] S632: Determine the remaining offset vector value by combining the real-time location point and the remaining location point.

[0188] The remaining offset vector value refers to the vector parameter representing the spatial position deviation of each remaining location point relative to the real-time location point.

[0189] By calculating the vector distance between the real-time location point and the remaining location point, the remaining offset vector value is obtained, which is convenient for subsequent use.

[0190] S633: Calculate the sum of all remaining offset vector values ​​and use it as the offset composite vector value.

[0191] Among them, the offset composite vector value refers to the composite vector parameter obtained by performing vector superposition operation on the remaining offset vector values ​​corresponding to all remaining position points.

[0192] The offset composite vector value is calculated to facilitate subsequent use.

[0193] S634: Determine the offset reference vector parameters based on the remaining offset vector values.

[0194] Among them, the offset benchmark vector parameter refers to the benchmark quantitative indicator used to define the reasonable fluctuation range of the remaining offset vector.

[0195] By analyzing the remaining offset vector values, the offset reference vector parameters can be determined, which will facilitate subsequent use.

[0196] To further ensure the rationality of the offset reference vector parameters, it is necessary to perform further separate analysis and calculation on the offset reference vector parameters, which will be explained in detail through the steps shown below.

[0197] The method for determining the offset reference vector parameters includes the following steps:

[0198] S6341: Retrieve the remaining offset distance value and remaining offset direction based on the remaining offset vector value.

[0199] The remaining offset distance refers to the straight-line distance between the remaining position point and the real-time position point. The remaining offset direction refers to the direction from the real-time position point to the remaining position point. The remaining offset vector value includes both the remaining offset distance and the remaining offset direction.

[0200] The remaining offset distance and direction can be retrieved using the remaining offset vector value for convenient subsequent use.

[0201] S6342: Sort the remaining offset distance values ​​from largest to smallest, and select the remaining offset distance value that ranks first as the maximum offset distance value.

[0202] The maximum offset distance value refers to the maximum value of the remaining offset distance value.

[0203] By sorting the remaining offset distance values ​​from largest to smallest, and selecting the first remaining offset distance value in the sorted order as the maximum offset distance value, it is convenient to use in subsequent operations.

[0204] S6343: Retrieve the width and length values ​​of the energy-absorbing box based on its specifications.

[0205] The width of the energy-absorbing box refers to the cross-sectional dimension of the energy-absorbing box along the direction perpendicular to the axial direction of the crash beam. The specifications of the energy-absorbing box include both its width and length. The length of the energy-absorbing box refers to the cross-sectional dimension of the energy-absorbing box along the direction parallel to the axial direction of the crash beam.

[0206] The width and length values ​​of the energy-absorbing box can be retrieved based on its specifications for convenient subsequent use.

[0207] S6344: Determine the width range by combining the width and length values ​​of the energy-absorbing box.

[0208] The width direction interval refers to the interval parameter used to constrain the offset range of the remaining position points in the width direction.

[0209] By taking the direction parallel to the axial direction of the anti-collision beam as one end direction of the interval, and taking the width and length values ​​of the energy-absorbing box as the hypotenuse of the right angle as the other end direction of the interval, a width direction interval is formed, which is convenient for subsequent use.

[0210] S6345: The maximum offset distance value is combined with the width direction interval and used as the offset reference vector parameter.

[0211] Specifically, by using the maximum offset distance value as the vector's magnitude and the width direction range as the vector's direction, a set of vectors with the same magnitude but different directions is formed and used as the offset reference vector parameter, which is convenient for subsequent use.

[0212] S635: Combine the offset composite vector value with the offset reference vector parameter to determine the position vector reference value, and use the position vector reference value as the welding position reference value.

[0213] Among them, the position vector reference value refers to a quantitative parameter that is used to refer to the important situation of the welding position based on the offset.

[0214] By combining the offset composite vector value with the offset reference vector parameter, the position vector reference value is determined and used as the welding position reference value, thereby improving the accuracy of the obtained welding position reference value.

[0215] To further ensure the rationality of the position vector reference value, it is necessary to perform further separate analysis and calculation on the position vector reference value, which will be explained in detail through the steps shown below.

[0216] The method for determining the position vector reference value includes the following steps:

[0217] S6351: Retrieves the reference distance value and reference direction interval based on the offset reference vector parameters.

[0218] Here, the reference distance value refers to the vector magnitude of the offset reference vector parameter. The reference direction interval refers to the vector direction of the offset reference vector parameter. The reference distance value is the maximum offset distance value, and the reference direction interval is the width direction interval.

[0219] The maximum offset distance value and the width direction range are retrieved by the offset reference vector parameters and used as the reference distance value and reference direction range respectively for convenient subsequent use.

[0220] S6352: Retrieves the composite distance value and composite direction based on the offset composite vector value.

[0221] The composite distance value refers to the distance value corresponding to the offset composite vector value. The composite direction refers to the direction corresponding to the offset composite vector value. The offset composite vector value includes both the composite distance value and the composite direction.

[0222] The composite distance and composite direction are retrieved by offsetting the composite vector value, which facilitates subsequent use.

[0223] S6353: Calculate the difference between the composite distance value and the reference distance value and use it as the distance deviation value.

[0224] The distance deviation value refers to the difference between the composite distance value and the reference distance value.

[0225] Calculating the distance deviation value facilitates subsequent use.

[0226] S6354: Determine the distance deviation reference value based on the distance deviation value.

[0227] The distance deviation reference value refers to the reference value used when referring to the distance deviation value. The larger the distance deviation value, the larger the distance deviation reference value.

[0228] The product of the distance deviation value and the preset distance reference coefficient is calculated to facilitate subsequent use.

[0229] The distance reference coefficient is a coefficient used to convert the distance deviation value into a distance deviation reference value. The distance reference coefficient is preset by the operator according to actual needs.

[0230] S6355: Determine the reference value for directional deviation by combining the comprehensive direction and the reference direction interval.

[0231] The direction deviation reference value refers to the reference value used when referring to the direction deviation.

[0232] By combining the analysis of the comprehensive direction and the reference direction interval, the reference value of the direction deviation is determined, which facilitates subsequent use.

[0233] To further ensure the rationality of the direction deviation reference value, it is necessary to perform a further separate analysis and calculation on the direction deviation reference value, which will be explained in detail through the steps shown below.

[0234] The method for determining the directional deviation reference value includes the following steps:

[0235] S63551: Determine whether the synthesis direction is within the reference direction interval. If yes, proceed to S63552; if no, proceed to S63553.

[0236] Specifically, by determining whether the overall direction is within the reference direction range, it can be determined whether the current welding position is close to the center of the energy-absorbing box.

[0237] S63552: Outputs a preset direction reference value and uses it as a direction deviation reference value.

[0238] The direction reference value refers to the reference value corresponding to when the direction meets the requirements. The direction reference value is obtained after being pre-input by the operator, and the direction reference value can be set to 1.

[0239] When the overall direction is within the reference direction range, it means that the current welding position is close to the middle of the energy-absorbing box. Therefore, the preset direction reference value is output and used as the direction deviation reference value, thereby improving the accuracy of the obtained direction deviation reference value.

[0240] S63553: Calculate the angle between the integrated direction and the reference direction interval and use it as the direction deviation angle value.

[0241] The directional deviation angle value refers to the angle between the comprehensive direction and the reference direction.

[0242] When the composite direction is not located within the reference direction interval, it indicates that the current welding position is not close to the center of the energy-absorbing box. Therefore, the angle between the two endpoints of the composite direction and the reference direction interval is calculated and used as the directional deviation angle value for subsequent use.

[0243] S63554: Calculate the ratio between the angular deviations of two directions and use it as the angular ratio value.

[0244] The angular ratio value refers to the ratio between the angular deviation values ​​of two directions.

[0245] Calculating the angle ratio value facilitates subsequent use.

[0246] S63555: Determine the angle ratio reference value based on the angle ratio value, and use the angle ratio reference value as the direction deviation reference value.

[0247] The angle ratio reference value refers to the reference value used when referring to the angle ratio. The smaller the angle ratio value, the further the overall direction is from the direction perpendicular to the axial direction of the crash beam, and the closer the angle ratio reference value is to 1. The larger the angle ratio value, the closer the overall direction is to the direction perpendicular to the axial direction of the crash beam, and the larger the angle ratio reference value is than 1.

[0248] By inputting the angle ratio value into a preset angle ratio reference database, an angle ratio reference value is obtained, and the angle ratio reference value is used as a direction deviation reference value for convenient subsequent use.

[0249] The angle ratio reference database has a pre-stored table of different angle ratio values ​​and their corresponding angle ratio reference values. The angle ratio reference database is obtained after the operator pre-inputs the values.

[0250] S6356: Determine a comprehensive reference value based on the distance deviation reference value and the direction deviation reference value, and use the comprehensive reference value as the position vector reference value.

[0251] Among them, the comprehensive reference value refers to the reference value corresponding to the comprehensive reference of distance and direction.

[0252] By weighting the distance deviation reference value and the direction deviation reference value, and using the calculation result as a comprehensive reference value, and then using the comprehensive reference value as the position vector reference value, the accuracy of the obtained position vector reference value is improved.

[0253] The specific weighting coefficients for the weighted calculation are preset by the operator according to actual needs.

[0254] S64: Determine the offset reference value based on the relative offset.

[0255] The offset reference value refers to the reference value when the relative offset is used as a reference.

[0256] The relative offset distance and direction are retrieved using the relative offset value. The larger the relative offset distance and the further the relative offset direction is from the horizontal direction, the larger the offset reference value. The offset reference value is obtained by inputting the relative offset distance and direction into a preset relative offset database for subsequent use.

[0257] The relative offset database has a pre-stored table of different relative offset distances, relative offset directions and corresponding offset reference values. The relative offset database is obtained after the operator pre-inputs the data.

[0258] S65: Determine the comprehensive reference value by combining the welding position reference value and the offset reference value.

[0259] The reference composite value refers to the reference value corresponding to the comprehensive consideration of the welding position and relative offset.

[0260] By weighting the welding position reference value and the offset reference value, and using the calculation result as a comprehensive reference value, it is convenient for subsequent use.

[0261] The weighted calculation coefficients are preset by the operator according to actual needs.

[0262] S66: The reference composite value and the relative offset are combined and used as the welding offset influence parameter.

[0263] Among them, the welding offset influence parameter refers to the influence parameter that characterizes the impact of the welding position offset caused by vibration on the welding.

[0264] By combining the reference composite value with the relative offset, a set of parameters is obtained and used as the welding offset influence parameter for convenient subsequent use.

[0265] S7: If and only if the welding offset influence parameter meets the preset moving reference value, combine the welding offset influence parameter with the current welding power to determine the welding adjustment information and output the welding adjustment information.

[0266] The moving reference value refers to the reference value required for adjustment. The moving reference value is preset by the operator based on actual needs.

[0267] Welding adjustment information refers to the adjustment information required when the welding position and welding power need to be adjusted.

[0268] By retrieving the reference comprehensive value and relative offset of the welding offset influence parameters, and determining whether the reference comprehensive value is greater than the preset moving reference value, it is found that the welding offset influence parameters meet the preset moving reference value. At this time, the relative offset is combined with the current welding power to form a set of control parameters that control the relative offset and weld with the current welding power. This set of control parameters is then output as welding adjustment information, thereby realizing real-time monitoring and dynamic adjustment of vibration offset during the welding process. This effectively avoids welding position deviation caused by vibration offset, ensures the welding fit accuracy between the energy-absorbing box and the anti-collision beam, and improves the welding quality of the energy-absorbing box and the anti-collision beam.

[0269] Based on the same inventive concept, embodiments of the present invention provide a mating welding system for an automobile bumper, comprising:

[0270] The data acquisition module is used to collect first vibration detection information, second vibration detection information, welding parameters, anti-collision beam specifications, and energy absorption box specifications.

[0271] The memory stores a program for implementing a welding method for a car bumper as described above;

[0272] The processor loads and executes programs stored in memory.

[0273] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0274] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method of fit welding of an automobile bumper, characterized by, include: S1: Collect the first vibration detection information of the anti-collision beam fixture, the second vibration detection information of the energy-absorbing box fixture, and the welding parameters of the welding device; S2: Determine the first vibration offset parameter based on the first vibration detection information; S3: Determine the second vibration offset parameter based on the second vibration detection information; S4: Analyze the first vibration offset parameter and the second vibration offset parameter to determine the relative offset of the energy absorption box; S5: Retrieve the current welding position and current welding power based on welding parameters; S6: Determine the welding offset influence parameters by combining the current welding position point and the relative offset; S7: If and only if the welding offset influence parameter meets the preset moving reference value, combine the welding offset influence parameter with the current welding power to determine the welding adjustment information and output the welding adjustment information; Methods for determining relative offset include: S41: Retrieve the first offset direction and the first offset distance value based on the first vibration offset parameter; S42: Retrieve the second offset direction and the second offset distance value based on the second vibration offset parameter; S43: Calculate the angle between the first offset direction and the second offset direction and use it as the offset deviation angle value; S44: Determine the offset reference angle range by combining the first offset direction with the preset offset influence reference direction; S45: Determine whether the offset deviation angle value is within the offset reference angle range; S46: If yes, then the initial offset is determined by combining the first vibration offset parameter and the second vibration offset parameter, and the initial offset is used as the relative offset. S47: If not, then determine the offset angle influence value by combining the first offset direction, the second offset direction and the preset offset influence reference direction; S48: Determine the adjustment offset by combining the first offset distance value, the second offset distance value, and the offset angle influence value, and use the adjustment offset as the relative offset; Methods for determining the parameters affecting welding offset include: S61: Collect specifications for the crash beam and energy-absorbing box; S62: Determine the welding locations based on the specifications of the anti-collision beam and the energy-absorbing box; S63: Determine the reference value for the welding position by combining the current welding position point with the required welding position point; S64: Determine the offset reference value based on the relative offset; S65: Determine the comprehensive reference value by combining the welding position reference value and the offset reference value; S66: The reference composite value and the relative offset are combined and used as the welding offset influence parameter.

2. The method of match welding an automobile bumper according to claim 1, wherein Methods for determining the influence value of offset angle include: S471: Determine the first reference angle value by combining the first offset direction with the preset offset influence reference direction; S472: Determine the second reference angle value by combining the second offset direction with the preset offset influence reference direction; S473: Determine whether the first reference angle value is greater than the second reference angle value; S474: If yes, then determine the first angle influence value based on the first reference angle value, and use the first angle influence value as the offset angle influence value; S475: If not, determine the second angle influence value based on the second reference angle value, and use the second angle influence value as the offset angle influence value.

3. A method of fit welding of an automobile bumper according to claim 2, wherein The methods for determining the adjustment offset include: S481: Determine whether the offset angle influence value is the first angle influence value; S482: If yes, calculate the product between the first angle influence value and the first offset distance value and use it as the first adjustment distance value; S483: Combine the first adjustment distance value, the first offset direction and the second vibration offset parameter to determine the first adjustment offset amount, and use the first adjustment offset amount as the adjustment offset amount; S484: If not, calculate the product between the second angle influence value and the second offset distance value and use it as the second adjustment distance value; S485: Combine the second adjustment distance value, the second offset direction and the first vibration offset parameter to determine the second offset amount, and use the second offset amount as the adjustment offset amount.

4. The method of match welding an automobile bumper according to claim 1, wherein Methods for determining welding position reference values ​​include: S631: The welding demand position point that is consistent with the current welding position point is taken as the real-time position point, and the welding demand position points other than the real-time position point are taken as the remaining position points; S632: Determine the remaining offset vector value by combining the real-time location point and the remaining location point; S633: Calculate the sum of all remaining offset vector values ​​and use it as the composite offset vector value; S634: Determine the offset reference vector parameters based on the remaining offset vector values; S635: Combine the offset composite vector value with the offset reference vector parameter to determine the position vector reference value, and use the position vector reference value as the welding position reference value.

5. A method of fit welding an automobile bumper according to claim 4, wherein The methods for determining the offset reference vector parameters include: S6341: Retrieve the remaining offset distance value and remaining offset direction based on the remaining offset vector value; S6342: Sort the remaining offset distance values ​​from largest to smallest, and select the remaining offset distance value that ranks first as the maximum offset distance value; S6343: Retrieve the width and length values ​​of the energy-absorbing box based on its specifications; S6344: Determine the width range by combining the width and length values ​​of the energy-absorbing box; S6345: The maximum offset distance value is combined with the width direction interval and used as the offset reference vector parameter.

6. The method of match welding an automobile bumper according to claim 4, wherein Methods for determining position vector reference values ​​include: S6351: Retrieves reference distance value and reference direction range based on offset reference vector parameters; S6352: Retrieve composite distance and composite direction based on offset composite vector value; S6353: Calculate the difference between the composite distance value and the reference distance value and use it as the distance deviation value; S6354: Determine the distance deviation reference value based on the distance deviation value; S6355: Determine the reference value for directional deviation by combining the comprehensive directional and the reference directional intervals; S6356: Determine a comprehensive reference value based on the distance deviation reference value and the direction deviation reference value, and use the comprehensive reference value as the position vector reference value.

7. The method for welding a car bumper according to claim 6, characterized in that, Methods for determining the direction deviation reference value include: S63551: Determine whether the composite direction is within the reference direction range; S63552: If yes, output the preset direction reference value and use it as the direction deviation reference value; S63553: If not, calculate the angle between the integrated direction and the reference direction interval and use it as the direction deviation angle value; S63554: Calculate the ratio between the angular deviation values ​​of two directions and use it as the angular ratio value; S63555: Determine the angle ratio reference value based on the angle ratio value, and use the angle ratio reference value as the direction deviation reference value.

8. A system for the butt welding of an automotive bumper characterized in that, include: The data acquisition module is used to collect first vibration detection information, second vibration detection information, welding parameters, anti-collision beam specifications, and energy absorption box specifications. The memory stores a program for implementing a method for welding a car bumper as described in any one of claims 1 to 7; The processor loads and executes programs stored in memory.

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