A mistake-proof tightening device and method with physical positioning

Abstract

The present application belongs to the technical field of passenger car assembly tightening operation, and particularly relates to a mistake-proof tightening device and method with physical positioning; wherein an X-direction guide rail is provided with an X-direction sliding seat, the X-direction sliding seat is provided with a Y-direction linear sliding rail, the Y-direction linear sliding rail is provided with a Y-direction sliding seat, a Y-direction servo motor is fastened on the Y-direction sliding seat and cooperates with a Y-direction linear sliding rail internal gear rack through a gear; the Y-direction sliding seat is provided with a Z-direction linear sliding rail and a Z-direction jacking cylinder, and a tightening machine is matched on the Z-direction linear sliding rail through a connecting plate; an X-direction servo motor is fixed on the X-direction sliding seat and cooperates with an X-direction guide rail internal gear rack through a gear; the present application formulates a mistake-proof tightening control system architecture for a general assembly workshop with digital information collection and interconnection function, deeply researches a mistake-proof tightening control logic and a production / quality management system, builds a mistake-proof tightening digital platform, and connects various information systems to realize automatic mistake-proof tightening function under the premise of ensuring information interconnection.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of passenger car assembly and tightening operation, and particularly relates to a mistake-proof tightening device and method with physical positioning. BACKGROUND

[0002] At present, in the passenger car assembly process, tightening is the main way to complete the assembly of various sub-assembly parts, and the work load accounts for 80% of all operations in the final assembly workshop, among which the assembly of chassis system and whole vehicle adopts the tightening method 100%. However, with the continuous improvement of the flexibility level of the final assembly workshop, the trend of multi-platform and multi-model inline production is becoming more and more obvious, resulting in more and more diversified chassis tightening positions, strategies and parameters. The chassis mistake tightening may cause abnormal noise, stoppage, and even serious quality problems such as half shaft falling off, so it is particularly important to realize the mistake-proof function of the chassis tightening.

[0003] At present, the industry mostly adopts the sleeve selector + manual visual mistake-proof method or the L-shaped anti-torsion arm + encoder device for mistake-proof tightening. Both methods need manual participation, and the beat in the tightening process is long, which cannot meet the demand of high-beat production. At the same time, the device is an isolated device, which cannot be interconnected with the production system, quality control system and tightening networking system, and cannot realize the functions of automatic issuing of tightening program, automatic selection of tightening position, automatic uploading of tightening result and defect placement and flow-out.

[0004] Moreover, most of the current mistake-proof tightening devices are hardware descriptions, focusing on the device body, and the structure is relatively simple, the function is relatively single, and the data interaction is less. SUMMARY

[0005] In order to overcome the above problems, the present application provides a mistake-proof tightening device and method with physical positioning; the present application realizes the closed-loop control of the whole manufacturing process from online to factory through system integration to ensure the functions of issuing from the vehicle sequence, tightening operation execution, tightening result tracing and defect placement and flow-out, thereby avoiding the mistake tightening defects caused by human participation.

[0006] A mistake-proof tightening device with physical positioning, comprising: an X-direction guide rail 1, a tightening machine 3, a Y-direction sliding seat 4, a Y-direction servo motor 5, an X-direction servo motor 10, a Z-direction lifting cylinder 11 and an X-direction sliding seat 12; wherein the X-direction sliding seat 12 is provided with an X-direction encoder 13, and the Y-direction sliding seat 4 is provided with a Y-direction encoder 6.

[0007] The X guide rail 1 is matched and connected with a plurality of X sliding seats 12, the X sliding seat 12 can slide along the X guide rail 1, the Y linear slide rail 2 is fixed above the X sliding seat 12, the Y sliding seat 4 is arranged on the Y linear slide rail 2, the Y servo motor 5 is fastened at the rear end of the Y sliding seat 4, and the driving shaft of the Y servo motor 5 is connected with the rack arranged in the Y linear slide rail 2 through a gear; the Z linear slide rail 14 is arranged at the front end of the Y sliding seat 4, and the tightening machine 3 is connected on the Z linear slide rail 14 through the second connecting plate 8 and the sliding block 15; the Z lifting cylinder 11 is arranged below the Y sliding seat 4, and the movable end of the Z lifting cylinder 11 is connected to the second connecting plate 8 on which the tightening machine 3 is arranged, so that the tightening machine 3 slides along the Z linear slide rail 14 under the driving of the movable end of the Z lifting cylinder 11.

[0008] The X servo motor 10 is fixed on the X sliding seat 12, the driving shaft of the X servo motor 10 penetrates through the bottom plate of the X sliding seat 12 and is connected with the rack arranged in the inner side of the X guide rail 1 through a gear, so that the X sliding seat 12 can reciprocate along the X direction on the X guide rail 1 under the driving of the X servo motor 10.

[0009] The Y linear slide rail 2 and the Z linear slide rail are respectively provided with limiting plates at both ends.

[0010] The Y linear slide rail 2 is provided with two Y sliding seats 4, the Y sliding seats 4 are connected together through the first connecting plate 7 at the bottom, the Z lifting cylinder 11 is fixed on the first connecting plate 7 through the third connecting plate 9 at the bottom, and the third connecting plate 9 is fixed on the Y sliding seat 4 at the top.

[0011] A mistake-proof tightening system with physical positioning, comprising: a whole vehicle production system, a central control system, a tightening networking system, an automatic tightening mistake-proof system and a quality control system, wherein the whole vehicle production system is signal connected with the automatic tightening mistake-proof system, transmits vehicle sequence and vehicle type information to the automatic tightening mistake-proof system; the central control system is signal connected with the automatic tightening mistake-proof system, provides real-time signals of vehicles to be docked with the automatic mistake-proof tightening system, and collects various signals fed back by the automatic tightening equipment; the tightening networking system is signal connected with the automatic tightening mistake-proof system and the quality control system respectively, provides different tightening point position coordinates, quantities and corresponding tightening strategies of corresponding vehicle types for the automatic mistake-proof tightening system, receives tightening information after the automatic tightening mistake-proof system implements tightening, and transmits the tightening information to the quality control system;

[0012] The automatic tightening mistake-proof system is signal connected with the X encoder 13 and the Y encoder 6 respectively, can receive movement distance information transmitted by the X encoder 13 and the Y encoder 6;

[0013] The automatic tightening mistake-proof system is signal connected with the position sensor on the tightening station, can read signals detected by the position sensor whether a vehicle is parked on the tightening station.

[0014] The tightening strategy includes the size of the tightening torque and the angle of screw rotation.

[0015] A method for tightening operation by using a mistake-proof tightening device with physical positioning, comprising the following contents:

[0016] Step one, the automatic tightening mistake-proof system receives the vehicle sequence and vehicle type information sent by the vehicle production system, and the real-time signal provided by the central control system whether the vehicle to be tightened reaches the tightening station, and then judges whether the tightening condition is met. If the tightening condition is not met, manually confirm the equipment failure until the fault is eliminated and then enter step two.

[0017] The tightening condition is:

[0018] First, the automatic tightening mistake-proof system confirms that the vehicle to be tightened is in the tightening station through the detection signal of the position sensor on the tightening station; second, the vehicle sequence and vehicle type information sent by the vehicle production system are consistent with the corresponding information read from the actual vehicle by the automatic tightening mistake-proof system.

[0019] If both conditions are met, it means that the tightening condition is met; if either condition is not met, it means that the tightening condition is not met.

[0020] Step two, the tightening network system provides the tightening point position coordinates on the vehicle to be tightened for the automatic mistake-proof tightening system, and the automatic tightening mistake-proof system sends the tightening point position coordinates to the position coordinate execution mechanism, which includes X-direction servo motor 10, Y-direction servo motor 5 and Z-direction lifting cylinder 11. The coordinate execution mechanism controls the movement of X-direction sliding seat 12, Y-direction sliding seat 4 and second connecting plate 8 of tightening machine 3 in X / Y / Z three directions according to the tightening point position coordinate information, so that the center point of the tightening position on the top of tightening machine 3 is consistent with the tightening point position coordinates.

[0021] Step three, during the movement of X-direction sliding seat 12, the automatic mistake-proof tightening system judges whether the final position of X-direction sliding seat 12 reaches the corresponding position when the center point of the tightening position on the top of tightening machine 3 is consistent with the tightening point position coordinates according to the linear movement distance feedback by X-direction encoder 13. If it is not moved to the position, manually confirm the equipment failure until the fault is eliminated and then enter step four.

[0022] Step four, the automatic mistake-proof tightening system judges whether the final position of Y-direction sliding seat 4 reaches the corresponding position when the center point of the tightening position on the top of tightening machine 3 is consistent with the tightening point position coordinates according to the linear movement distance feedback by Y-direction encoder 6. If it is not moved to the position, manually confirm the equipment failure until the fault is eliminated and then enter step five.

[0023] Step five, the automatic error-proof tightening system receives the tightening program sent by the central control system, controls the tightening machine 3 to align the tightening bolt at the tightening point position on the vehicle, and starts tightening; the tightening machine 3 completes the tightening operation;

[0024] Step six, the automatic error-proof tightening system obtains the tightening result from the tightening machine 3, transmits the tightening result to the tightening networking system, and the tightening networking system sends the whole vehicle tightening result information to the quality control system; the quality control system keeps a record for future quality problem tracing;

[0025] Step seven, after the tightening is completed, the automatic error-proof tightening system controls the X-direction servo motor 10 and the Y-direction servo motor 5 to drive the X-direction sliding seat 12 and the Y-direction sliding seat 4 to retreat to the initial position respectively, if the X-direction sliding seat 12 and the Y-direction sliding seat 4 cannot retreat, manual confirmation of equipment failure is performed until the fault is eliminated and step eight is entered;

[0026] Step eight, the automatic error-proof tightening system sends a release signal to the central control system, and the central control system controls the vehicle to drive out from the tightening station.

[0027] The quality control system receives the vehicle tightening defect information transmitted from the tightening networking system, and compares the tightening result with the corresponding vehicle tightening defect information every time the automatic error-proof tightening system completes a tightening, confirms whether the tightening result is one of the tightening defect information, and if so, the tightening defect information is eliminated, and after all the defects are eliminated, a qualified certificate is printed for the whole vehicle.

[0028] The tightening result is that the tightening process of the tightening machine 3 is qualified or unqualified.

[0029] The beneficial effects of the present application are as follows:

[0030] The present application provides a feasible signal interaction solution and an end automatic error-proof tightening device, aiming to solve the signal confirmation problem between systems in the automatic error-proof tightening implementation process of the chassis, realize the data transmission and error-proof function of the automatic tightening device in the total assembly big data environment. The system connects the automatic tightening device with the whole vehicle production system, the central control system, the quality control system and the tightening networking system, realizes real-time acceptance and feedback of data signals, guides the device to complete a series of tightening operations, and meets the actual production demand. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and these drawings.

[0032] Figure 1 It is a structural schematic diagram of the present application.

[0033] Figure 2 It is a partial structural schematic diagram of the present application.

[0034] Figure 3 It is a structural schematic diagram of the present application.

[0035] Wherein: X guide rail 1, Y straight slide rail 2, tightening machine 3, Y slide 4, Y servo motor 5, Y encoder 6, first connecting plate 7, second connecting plate 8, third connecting plate 9, X servo motor 10, Z lifting cylinder 11, X slide 12, X encoder 13, Z straight slide rail 14, slide block 15. DETAILED DESCRIPTION

[0036] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0037] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique above of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique below of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0040] Example 1

[0041] like Figure 1 As shown, the main actuator of the automatic error-proof tightening system—an error-proof tightening device with physical positioning—includes: an X-axis guide rail 1, a tightening machine 3, a Y-axis slide 4, a Y-axis servo motor 5, an X-axis servo motor 10, a Z-axis lifting cylinder 11, and an X-axis slide 12; wherein the X-axis slide 12 is equipped with an X-axis encoder 13 (capable of reading linear displacement), and the Y-axis slide 4 is equipped with a Y-axis encoder 6;

[0042] Multiple X-axis slide blocks 12 are connected to the X-axis guide rail 1, and the X-axis slide blocks 12 can slide along the X-axis guide rail 1. A Y-axis linear slide rail 2 is fixed above the X-axis slide block 12, and a Y-axis slide block 4 is provided on the Y-axis linear slide rail 2. A Y-axis servo motor 5 is fastened to the rear end of the Y-axis slide block 4 by bolts, and its drive shaft is connected to the rack and pinion set inside the Y-axis linear slide rail 2 by gears, so that the Y-axis slide block 4 can reciprocate along the Y-axis on the Y-axis linear slide rail 2 under the drive of the Y-axis servo motor 5. A Z-axis linear slide rail 14 is provided at the front end of the Y-axis slide block 4. The tightening machine 3 is connected to the Z-axis linear slide rail 14 by a second connecting plate 8 and a slider 15. The Z-axis lifting cylinder 11 is fixed to the bottom of the Y-axis slide block 4, and its movable end is connected to the second connecting plate 8 on which the tightening machine 3 is installed, so that the tightening machine 3 slides along the Z-axis linear slide rail 14 under the drive of the movable end of the Z-axis lifting cylinder 11.

[0043] The X-axis servo motor 10 is fixed on the X-axis slide block 12, and its drive shaft passes through the bottom plate of the X-axis slide block 12 and is connected to the rack provided on the inner side of the X-axis guide rail 1 through gears, so that the X-axis slide block 12 can reciprocate along the X direction on the X-axis guide rail 1 under the drive of the X-axis servo motor 10.

[0044] Limiting plates are provided at both ends of the Y-axis linear slide rail 2 and the Z-axis linear slide rail to prevent over-positioning during movement.

[0045] The Y-direction linear slide rail 2 is provided with two Y-direction slide blocks 4. The bottom of the Y-direction slide blocks 4 are connected together by the first connecting plate 7. The bottom of the Z-direction lifting cylinder 11 is fixed on the first connecting plate 7 by the third connecting plate 9, and the top of the third connecting plate 9 is fixed on the Y-direction slide block 4.

[0046] An error-proof tightening system with physical positioning, comprising: a whole vehicle production system, a central control system, a tightening networking system, an automatic tightening error-proof system and a quality control system, wherein the whole vehicle production system is signal connected with the automatic tightening error-proof system, and transmits vehicle sequence and vehicle type information to the automatic tightening error-proof system; the central control system is signal connected with the automatic tightening error-proof system, provides real-time signals of a vehicle to be connected with the automatic error-proof tightening system, and collects various signals fed back by the automatic tightening device; the tightening networking system is signal connected with the automatic tightening error-proof system and the quality control system respectively, provides different tightening point position coordinates, quantities and corresponding tightening strategies of corresponding vehicle types for the automatic error-proof tightening system, receives tightening information after the automatic tightening error-proof system implements tightening, and then transmits the tightening information to the quality control system;

[0047] The automatic tightening error-proof system is signal connected with the X-direction encoder 13 and the Y-direction encoder 6, and can receive movement distance information transmitted by the X-direction encoder 13 and the Y-direction encoder 6.

[0048] The automatic tightening error-proof system is signal connected with the position sensor on the tightening station, and can read signals detected by the position sensor on whether a vehicle is parked on the tightening station.

[0049] The tightening strategy comprises a tightening torque and a screw rotation angle.

[0050] A method for tightening operation by using an error-proof tightening device with physical positioning, comprising the following contents:

[0051] Step one, the automatic tightening error-proof system receives vehicle sequence and vehicle type information sent by the whole vehicle production system, and real-time signals of whether a vehicle to be tightened reaches a tightening station provided by the central control system, and then judges whether a tightening condition is met, if not, manually confirms device failure until the fault is eliminated and then enters step two.

[0052] The tightening condition is:

[0053] One is that the automatic tightening error-proof system confirms that a vehicle to be tightened is on a tightening station through detection signals of a position sensor on the tightening station; two is that vehicle sequence and vehicle type information sent by the whole vehicle production system are consistent with corresponding information read from an actual vehicle chip by the automatic tightening error-proof system.

[0054] Both of the above two conditions are met, which means that the tightening condition is met, and if any one of the conditions is not met, it means that the tightening condition is not met.

[0055] Step two, the tightening networking system provides the tightening point position coordinates on the vehicle to be tightened for the automatic error-proof tightening system, and the automatic error-proof tightening system sends the tightening point position coordinates to the position coordinate execution mechanism, wherein the position coordinate execution mechanism includes an X-direction servo motor 10, a Y-direction servo motor 5 and a Z-direction lifting cylinder 11, and the coordinate execution mechanism controls the X-direction sliding seat 12, the Y-direction sliding seat 4 and the second connecting plate 8 on which the tightening machine 3 is installed to move in the X / Y / Z three directions respectively according to the tightening point position coordinate information, so that the center point of the tightening position on the top of the tightening machine 3 is consistent with the tightening point position coordinates;

[0056] Step three, during the movement of the X-direction sliding seat 12, the automatic error-proof tightening system judges whether the final position of the X-direction sliding seat 12 reaches the corresponding position when the center point of the tightening position on the top of the tightening machine 3 is consistent with the tightening point position coordinates according to the linear movement distance fed back by the X-direction encoder 13, if not, the device fault is confirmed manually until the fault is eliminated and step four is entered;

[0057] Step four, the automatic error-proof tightening system judges whether the final position of the Y-direction sliding seat 4 reaches the corresponding position when the center point of the tightening position on the top of the tightening machine 3 is consistent with the tightening point position coordinates according to the linear movement distance fed back by the Y-direction encoder 6, if not, the device fault is confirmed manually until the fault is eliminated and step five is entered;

[0058] Step five, the automatic error-proof tightening system receives the tightening program sent by the central control system, controls the tightening machine 3 to align the tightening bolts at the tightening point position on the vehicle, and starts tightening; the tightening machine 3 completes the tightening operation according to the preset program: reverse rotation → identification → fast tightening → slow tightening → final tightening;

[0059] Step six, the automatic error-proof tightening system obtains the tightening result from the tightening machine 3, transmits the tightening result to the tightening networking system, and the tightening networking system sends the whole vehicle tightening result information to the quality control system; the quality control system keeps the certificate for easy follow-up quality problem tracing;

[0060] Step seven, after the tightening is completed, the automatic error-proof tightening system controls the X-direction servo motor 10 and the Y-direction servo motor 5 to drive the X-direction sliding seat 12 and the Y-direction sliding seat 4 to retreat to the initial position respectively, if the X-direction sliding seat 12 and the Y-direction sliding seat 4 cannot retreat, the device fault is confirmed manually until the fault is eliminated and step eight is entered;

[0061] Step eight, the automatic error-proof tightening system sends a release signal to the central control system, and the central control system controls the vehicle to drive out of the tightening station.

[0062] The quality control system receives vehicle tightening defect information transmitted from the tightening network system. Whenever the automatic error-proof tightening system completes a tightening, the quality control system compares the tightening result with the corresponding vehicle tightening defect information to confirm whether the tightening result is one of the tightening defect information. If so, the tightening defect information is cleared. After all defects are cleared, a certificate of conformity is printed for the whole vehicle.

[0063] The results of vehicle tightening defects are entered into the quality network system through the repair equipment. When the vehicle is printing a certificate of conformity, the repair equipment will retrieve the defect result information of the vehicle from the quality network system. If the defects have been repaired, the certificate of conformity will be printed normally. If the defects have not been repaired, the certificate of conformity cannot be printed.

[0064] The tightening result indicates whether the tightening process of the tightening machine 3 is qualified or unqualified.

[0065] Example 2

[0066] The main components of this invention are a vehicle production system, a central control system, a tightening network system, a quality control system, and an automatic error-proof tightening system. The automatic error-proof tightening system receives vehicle model data from the vehicle production system, position signals from the central control system, and tightening strategy signals from the tightening network system, and controls the various actions of the tightening equipment. After the chassis tightening pass signal is fed back to the central control system, the central control system releases the vehicle and uploads the tightening information to the quality control system for record-keeping. Simultaneously, the quality control system manages the vehicle's certificate of conformity, refusing to print certificates for vehicles with tightening defects until the defects are resolved, at which point the certificate can be printed and the vehicle can leave the factory.

[0067] The system architecture adopted in this invention is as follows: Figure 3 As shown:

[0068] The vehicle production system is a platform for summarizing production information in the final assembly workshop. It provides accurate and detailed vehicle sequence and model information for the automatic error-proofing tightening system. The automatic error-proofing tightening system extracts information on model configuration and tightening quantity from this information as the first input to the system.

[0069] The central control system is a platform for summarizing information from all equipment in the final assembly workshop. It provides real-time signals from the equipment it interfaces with to the automatic error-proof tightening system, and collects various signals fed back by the automatic tightening equipment, such as the arrival signals of vehicles and components and the release signals returned after tightening is completed, as the second input to the automatic tightening error-proof system.

[0070] The tightening network system is a platform that aggregates all torque information in the final assembly workshop. It provides the tightening point coordinates and corresponding tightening programs for the automatic error-proof tightening system, and is the third and most important input for the automatic error-proof tightening system.

[0071] The automatic tightening error-proof system starts to control the position coordinate actuator and the tightening program actuator to complete the tightening operation after obtaining the input signals of the upper three systems.

[0072] After the tightening is completed, the tightening result is uploaded to the quality control system for backup and retention, facilitating subsequent quality problem tracing; meanwhile, whether the tightening defects of the vehicle are eliminated is monitored, and the qualified certificate can be printed and the vehicle can be delivered after all defects are eliminated.

[0073] The components are connected through screwing, wherein the tightening machines 3 are respectively installed on the Y-direction sliding seat 4, and the X-direction sliding seat 12 can move on the X-direction guide rail 1. The Y-direction encoder 6 can obtain the movement coordinates of the tightening machine 3 in the Y-direction by driving the Y-direction sliding seat 4 to move through the Y-direction servo motor 5. The X-direction encoder 13 can obtain the movement coordinates of the tightening machine 3 in the X-direction by driving the X-direction sliding seat 12 to move through the X-direction servo motor 10. Therefore, the device can obtain the planar coordinates of the tightening machine 3 in the X and Y directions, realize physical positioning and error-proof tightening by establishing the whole vehicle coordinate system, and avoid the Y-direction sliding seat 4 and the X-direction sliding seat 12 from moving out of their respective corresponding tracks.

[0074] The application formulates the error-proof tightening control system architecture for the general assembly workshop with digital information acquisition and interconnection function, designs the factory-level automatic error-proof tightening execution device, and realizes the automatic error-proof tightening function by deeply researching the error-proof tightening control logic and production / quality management system, and the core content is to build the error-proof tightening digital platform and connect various information systems under the premise of ensuring information interconnection.

[0075] The preferred embodiments of the application are described in detail above with reference to the drawings, but the protection scope of the application is not limited to the specific details in the above embodiments. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the application within the technical scope disclosed by the application, and these simple modifications all belong to the protection scope of the application.

[0076] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the application will not further describe various possible combinations.

[0077] In addition, various different embodiments of the application can also be combined in any appropriate manner, as long as they do not deviate from the idea of the application, and they should also be considered as disclosed by the application.

Claims

1. A method of tightening with a mistake-proof tightening device provided with physical positioning, characterized in that, Comprise the following contents: Step one, the automatic tightening mistake proofing system receives the vehicle sequence, vehicle type information sent by the whole vehicle production system, and the real-time signal provided by the central control system whether the vehicle to be tightened reaches the tightening station, and then judges whether the tightening condition is met. If the tightening condition is not met, manually confirm the equipment failure until the fault is eliminated and then enter step two; Wherein the tightening condition is: First, the automatic tightening mistake proofing system confirms that the vehicle to be tightened is in the tightening station through the detection signal of the position sensor on the tightening station; second, the vehicle sequence and vehicle type information sent by the whole vehicle production system are consistent with the corresponding information read from the actual vehicle by the automatic tightening mistake proofing system; Both of the above two conditions are met at the same time, which means that the tightening condition is met. If any one of them is not met, it means that the tightening condition is not met; Step two, the tightening network system provides the position coordinates of the tightening point on the vehicle to be tightened for the automatic mistake proofing tightening system, and the automatic tightening mistake proofing system sends the position coordinates of the tightening point to the position coordinate execution mechanism, wherein the position coordinate execution mechanism includes X direction servo motor (10), Y direction servo motor (5) and Z direction lifting cylinder (11). The coordinate execution mechanism controls the X direction sliding seat (12), Y direction sliding seat (4) and connecting plate (8) installed with tightening machine (3) to move in X / Y / Z three directions respectively according to the position coordinates of the tightening point, so that the center point of the tightening machine (3) top tightening position is consistent with the position coordinates of the tightened point; Step three, during the movement of the X direction sliding seat (12), the automatic mistake proofing tightening system judges whether the final position of the X direction sliding seat (12) reaches the corresponding position when the center point of the tightening machine (3) top tightening position is consistent with the position coordinates of the tightened point according to the straight line movement distance feedback by the X direction encoder (13). If it is not moved to the position, manually confirm the equipment failure until the fault is eliminated and then enter step four; Step four, the automatic mistake proofing tightening system judges whether the final position of the Y direction sliding seat (4) reaches the corresponding position when the center point of the tightening machine (3) top tightening position is consistent with the position coordinates of the tightened point according to the straight line movement distance feedback by the Y direction encoder (6). If it is not moved to the position, manually confirm the equipment failure until the fault is eliminated and then enter step five; Step five, the automatic mistake proofing tightening system receives the tightening program sent by the central control system, controls the tightening machine (3) to align the tightening bolt of the tightened point position on the vehicle, and starts tightening; the tightening machine (3) completes the tightening operation; Step six, the automatic mistake proofing tightening system obtains the tightening result from the tightening machine (3), transmits the tightening result to the tightening network system, and the tightening network system sends the whole vehicle tightening result information to the quality control system; The quality control system keeps the certificate for future quality problem tracing; Step seven, after the tightening is completed, the automatic mistake proofing tightening system controls the X direction servo motor (10) and Y direction servo motor (5) to drive the X direction sliding seat (12) and Y direction sliding seat (4) to retreat to the initial position respectively. If the X direction sliding seat (12) and Y direction sliding seat (4) cannot retreat, manually confirm the equipment failure until the fault is eliminated and then enter step eight; Step eight, the automatic mistake proofing tightening system sends the release signal to the central control system, and the central control system controls the vehicle to drive out of the tightening station.

2. The method of screwing operation according to claim 1, characterized in that, The quality control system receives vehicle tightening defect information transmitted from the tightening networking system, compares the tightening result with the corresponding vehicle tightening defect information every time the automatic error-proof tightening system completes a tightening, confirms whether the tightening result is one of the tightening defect information, and if so, cancels the tightening defect information, and after all defects are cancelled, prints a qualified certificate for the whole vehicle.

3. The method of tightening operation according to claim 1, characterized in that, The tightening result is that the tightening machine (3) this time is qualified or unqualified.

4. The method of tightening operation according to claim 1, characterized in that, The error-proof tightening equipment with physical positioning comprises an X-direction guide rail (1), a tightening machine (3), a Y-direction sliding seat (4), a Y-direction servo motor (5), an X-direction servo motor (10), a Z-direction lifting cylinder (11) and an X-direction sliding seat (12), wherein the X-direction sliding seat (12) is provided with an X-direction encoder (13), and the Y-direction sliding seat (4) is provided with a Y-direction encoder (6). The X-direction guide rail (1) is provided with a plurality of X-direction sliding seats (12) in matched connection, the X-direction sliding seat (12) can slide along the X-direction guide rail (1), the Y-direction linear slide rail (2) is fixed above the X-direction sliding seat (12), the Y-direction sliding seat (4) is arranged on the Y-direction linear slide rail (2), the Y-direction servo motor (5) is fastened at the rear end of the Y-direction sliding seat (4), and the driving shaft of the Y-direction servo motor (5) is connected with the rack arranged in the Y-direction linear slide rail (2) through a gear, the Z-direction linear slide rail (14) is arranged at the front end of the Y-direction sliding seat (4), and the tightening machine (3) is connected with the Z-direction linear slide rail (14) through the second connecting plate (8) and the sliding block (15), the Z-direction lifting cylinder (11) is arranged below the Y-direction sliding seat (4), and the movable end of the Z-direction lifting cylinder (11) is connected with the second connecting plate (8) on which the tightening machine (3) is arranged, so that the tightening machine (3) slides along the Z-direction linear slide rail (14) under the driving of the movable end of the Z-direction lifting cylinder (11). The X-direction servo motor (10) is fixed on the X-direction sliding seat (12), the driving shaft of the X-direction servo motor (10) penetrates through the bottom plate of the X-direction sliding seat (12) and is connected with the rack arranged in the inner side of the X-direction guide rail (1) through a gear, so that the X-direction sliding seat (12) can reciprocate along the X-direction guide rail (1) under the driving of the X-direction servo motor (10).

5. The method of tightening operation according to claim 4, characterized in that, The Y-direction linear slide rail (2) and the Z-direction linear slide rail are respectively provided with limiting plates at the two ends.

6. The method of tightening operation according to claim 4, wherein, The Y-direction linear slide rail (2) is provided with two Y-direction sliding seats (4), the Y-direction sliding seats (4) are connected together through the first connecting plate (7), the bottom of the Z-direction lifting cylinder (11) is fixed on the first connecting plate (7) through the third connecting plate (9), and the top of the third connecting plate (9) is fixed on the Y-direction sliding seat (4).

7. The method of tightening operation according to claim 4, wherein, The error-proof tightening system based on the error-proof tightening device with physical positioning comprises a whole vehicle production system, a central control system, a tightening networking system, an automatic tightening error-proof system and a quality control system. The whole vehicle production system is signal connected with the automatic tightening error-proof system to transmit vehicle sequence and vehicle type information to the automatic tightening error-proof system. The central control system is signal connected with the automatic tightening error-proof system to provide real-time signals of the vehicle to be connected with the automatic error-proof tightening system and collect various signals fed back by the automatic tightening device. The tightening networking system is signal connected with the automatic tightening error-proof system and the quality control system respectively to provide different tightening point position coordinates, quantity and corresponding tightening strategies of the corresponding vehicle type for the automatic error-proof tightening system, receive the tightening information after the automatic tightening error-proof system implements tightening, and then transmit the tightening information to the quality control system. The automatic tightening error-proof system is signal connected with the X-direction encoder (13) and the Y-direction encoder (6) to be able to receive the moving distance information transmitted by the X-direction encoder (13) and the Y-direction encoder (6). The automatic tightening error-proof system is signal connected with the position sensor on the tightening work station to be able to read the signal of whether the vehicle is parked on the tightening work station detected by the position sensor.

8. The method of tightening operation according to claim 7, characterized in that, The tightening strategy comprises the size of the tightening torque and the screw rotation angle.

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