Automobile part airtight structure, airtight detection device and detection control method thereof

Abstract

The invention discloses an automobile part airtight structure, an airtight detection device and a detection control method thereof, and belongs to the technical field of airtight detection. The automobile part airtight structure comprises a first part and a second part, a closed space is arranged between the first part and the second part, an antenna module is arranged in the closed space, the first part and the second part are in contact connection, and the joint of the first part and the second part is connected and sealed in a press-fit welding mode. According to the invention, air tightness detection of a product after laser welding is realized through the air tightness detection device, and under the action of a control system, rapid and stable air tightness test is realized, production efficiency and process rhythm optimization are realized, whole-course automatic feeder test is realized, and manual participation is reduced; the buffer area is arranged between the transfer manipulator and the material taking manipulator, so that ordered connection of a feeding procedure and a detection procedure is realized, product transfer and detection and material taking are performed at the same time, the two manipulators cooperate with each other and do not interfere with each other, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of airtightness detection, and more specifically, relates to an airtightness structure of automobile parts, an airtightness detection device and a detection control method thereof. Background Art

[0002] The working principle of the UWB antenna module is based on sending and receiving pulse signals with very short duration. These pulse signals are at the nanosecond level, have an extremely wide spectrum, and can work without interfering with other wireless communication systems. By measuring the time difference between sending and receiving these pulse signals, the UWB antenna module can accurately calculate the distance the signal is transmitted, thereby achieving high-precision positioning and data transmission. By placing UWB antennas on the car, using all these antennas, the position of the key or smartphone can be accurately located, and the UWB antenna module can be used in cars of multiple platforms.

[0003] In the prior art, the upper and lower structures of the UWB antenna module are usually connected by snap-on connection, threaded connection or ultrasonic welding, which have operational defects of varying degrees, such as high processing precision, poor connection stability, poor airtightness, high cost, and complex assembly process. Moreover, when the product is tested for airtightness, the existing airtightness testing equipment has low automation and operating efficiency, poor production rhythm connection, and it is difficult for the control system to form unified control. Different processes interfere with each other, further affecting product testing efficiency. Summary of the invention

[0004] The present invention aims at solving the technical problems existing in the prior art and provides an airtight structure of automobile parts, an airtight detection device and a detection control method thereof.

[0005] In order to solve the above technical problems, the present invention first provides the following technical solutions: an airtight structure of an automobile part, comprising a first component and a second component, a confined space is arranged between the first component and the second component, an antenna module is arranged in the confined space, the first component and the second component are contacted and connected, and the connection between the first component and the second component is sealed by compression welding.

[0006] Preferably, the first component and the second component are welded by laser welding equipment, the laser welding equipment is provided with a fixture, the fixture comprises an upper fixture and a lower fixture, the airtight structure of the automobile part is arranged between the upper fixture and the lower fixture, the lower fixture supports and positions the airtight structure of the automobile part, the upper fixture presses the airtight structure of the automobile part, and the pressing area of ​​the upper fixture is composed of a projection layer material;

[0007] The first component is arranged on the second component, and the welding laser passes through the upper fixture and the first component to melt the outer edge of the second component located at the bottom, and then the second component is pressed and connected with the outer edge of the first component. The welding and pressing area between the first component and the second component is arranged along their outer edges, and the laser welding track is a rectangular outline with rounded corners.

[0008] Furthermore, the present invention also provides an airtight detection device for an airtight structure of an automobile part, comprising a supporting mechanism, a transfer mechanism and a testing mechanism, and also comprising a control system, the control system controlling the actions of the transfer mechanism and the testing mechanism, the transfer mechanism comprising a transfer manipulator and a material taking manipulator, the transfer manipulator is connected to a product EOLT detection device, the material taking manipulator is in communication with the testing mechanism, and a buffer area is provided between the transfer manipulator and the material taking manipulator;

[0009] The testing mechanism includes an airtight testing section and a product positioning fixture, and the material picking robot is connected to the buffer area and the product positioning fixture.

[0010] Preferably, the cache area is provided with a cache platform, the cache platform is provided with a product carrier, and the product carrier is provided with a product positioning component;

[0011] The testing organization is equipped with an airtight testing instrument, and the product positioning fixture is connected to the product clamping mechanism and quick-change tooling.

[0012] Preferably, the transfer robot is connected to a gripping portion, the material taking robot is connected to a vacuum suction cup, and the vacuum suction cup is connected to a driving mechanism that moves along the axial direction of the vacuum suction cup;

[0013] The vacuum suction cups are provided in multiple groups, and include at least one group of loading suction cups and one group of unloading suction cups.

[0014] Preferably, it also includes a re-measurement mechanism, which includes a re-measurement product moving part and a re-measurement support tooling, and the re-measurement support tooling is arranged within the movement range of the transfer robot and the material picking robot.

[0015] Preferably, the control system includes a control terminal and a test PC end, the control terminal and the test PC end adopt a two-way communication mode to perform two-way data exchange, and the test PC end is connected to the test organization;

[0016] The direct output IO of the control terminal includes two parts: the front-end control cylinder + vacuum suction cup + air blowing of the material picking manipulator and its corresponding feedback sensor, the peripheral control part and its auxiliary sensor;

[0017] The action sequence of the reclaiming robot includes:

[0018] Task 1: The robot returns to the initial origin position;

[0019] Task 2, the manipulator returns to the maintenance service position;

[0020] Task 3, the robot goes to the location where the item is lost;

[0021] Task 4, the manipulator returns to a safe position;

[0022] Task 5, the robot picks up materials from tooling 1;

[0023] Task 6, the robot picks up materials from tooling 2;

[0024] Task 7, the robot puts the material into the airtightness testing station;

[0025] Task 8, the robot picks up materials from the airtightness testing station;

[0026] Task 9, the robot puts the material into the defective box;

[0027] Task 10: The robot puts the material on the good product conveyor belt;

[0028] Task 11, picking up materials in the robot rework process;

[0029] Each action sequence includes logical interactions with the control terminal, including point-to-point trajectory actions during the operation of the robot, and the controller of the robot cylinder + vacuum suction cup + blowing;

[0030] The action sequence for Task 5 includes the following steps:

[0031] Step 1, robot operation speed: fast 100% rate;

[0032] Step 2, the manipulator reaches the initial preparation position;

[0033] Step 3: The robot moves horizontally to the position above tooling 1 by +240mm;

[0034] Step 4: The two cylinders at the front end of the manipulator descend;

[0035] Step 5: The manipulator moves vertically to +15mm above the position of tooling 1;

[0036] Step 6, robot operation speed: low speed 5% rate;

[0037] Step 7, the manipulator moves vertically to the tooling 1 position;

[0038] Step 8, determine whether there are products on the left and right sides of the tooling;

[0039] Step 9, open the vacuum valve based on the judgment in the previous step, and pick up the product with the help of vacuum;

[0040] Step 10, the front two cylinders rise;

[0041] Step 11, robot operation speed: fast 100% rate;

[0042] Step 12, the manipulator moves vertically to +240mm above the position of tooling 1;

[0043] Step 13: The robot returns to the initial preparation position.

[0044] Preferably, there are five branch actions in the operation logic of the detection device, namely: taking materials from tooling 1; taking materials from tooling 2; waiting for the airtightness tester to end; rework and retesting process; start-up process, and then the operation branch is judged through the control terminal. Each branch can jump to each other and operate according to the branch. The control system calls the encapsulated standard communication process, then enters the underlying processing process to communicate with the manipulator, and then calls the manipulator's motion sequence to implement the execution action.

[0045] Furthermore, the present invention also provides a method for controlling the airtight structure of automobile parts, wherein the airtight detection comprises the following steps:

[0046] Filling, inflating air between the first component and the second component of the airtight structure of the automobile part;

[0047] Hold, after inflation is completed, hold for a period of time and measure the gas leakage value.

[0048] Preferably, the test process includes five stages, namely: delay stage, inflation stage, stabilization stage, test stage, and exhaust stage;

[0049] When the testing agency conducts the test, the inflation level is maintained at 60 kPa, the inflation time is 6 seconds, the holding time is 5 seconds, and the leakage time is 5 seconds. When the inflation level is reached, the measured value is the holding value. After the holding time is over, the measured value starts to be measured. After the leakage time, the leakage value is measured.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The airtight structure of automobile parts provided by the present invention adopts laser welding to connect the first component and the second component, and has stable connection and good airtightness, and has excellent protection ability against liquid and solid particles. It can not only prevent dust penetration but also has sealing performance that can prevent short-term immersion, has good anti-immersion performance, and is reliable and stable to use.

[0052] The embodiment of the present invention realizes the airtightness detection of the product after laser welding through the airtightness detection device. Under the action of the control system, a fast and stable airtightness test is realized, the production efficiency and process rhythm are optimized, the full-process automatic loader test is realized, and manual participation is reduced; by setting a buffer area between the transfer robot and the material picking robot, the orderly connection between the loading process and the detection process is realized, the product transfer and detection and material picking are carried out simultaneously, and the product automatic airtightness detection is realized. The two robots cooperate with each other without interfering with each other, thereby improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0054] Figure 1 A schematic structural diagram of an airtight structure of an automobile part is provided for an embodiment of the present invention;

[0055] Figure 2 A schematic diagram of the structure of a UWB antenna module provided by an embodiment of the present invention;

[0056] Figure 3 This is a schematic diagram of the welding trajectory of the laser welding equipment of the product of the present invention;

[0057] Figure 4 A schematic diagram of the structure of an airtight detection device for an airtight structure of an automobile part provided by an embodiment of the present invention;

[0058] Figure 5 This is a schematic diagram of the layout structure of the EOLT work area and the airtight test work area in an embodiment of the present invention;

[0059] Figure 6 It is a schematic diagram of the structure of a cache platform embodiment of the present invention;

[0060] Figure 7 It is a structural schematic diagram of an embodiment of a transfer robot of the present invention;

[0061] Figure 8 It is a structural schematic diagram of an embodiment of a material reclaiming manipulator of the present invention;

[0062] Fig. 9 It is a structural schematic diagram of an embodiment of a testing mechanism of the present invention;

[0063] Fig.10 For the present invention Figure 5 A schematic diagram of the partially enlarged structure at center A;

[0064] Fig.11 A schematic diagram of a control flow of a control system provided by an embodiment of the present invention;

[0065] Fig.12 This is a schematic diagram of the material-retrieving robot of the present invention in a state where the robot does not retrieve materials;

[0066] Fig.13 This is a schematic diagram of the material retrieving robot of the present invention in the state of retrieving materials;

[0067] Fig.14This is a schematic diagram of the material retrieving robot of the present invention in the finished state of retrieving materials;

[0068] Fig.15 A schematic diagram of a manual control interface for the action sequence of manipulator task 5 of the present invention;

[0069] Fig.16 It is a schematic diagram of five branch logic controls of the operation logic of the airtight test mechanism of the present invention;

[0070] Fig.17 It is a logic control schematic diagram of one embodiment of the operation logic of the airtight testing mechanism of the present invention;

[0071] Fig.18 This is a schematic diagram of the airtightness detection control process of the product of the present invention;

[0072] Fig.19 Schematic diagram showing each stage of the airtightness test process of the present invention.

[0073] A schematic structural diagram of an embodiment;

[0074] Explanation of symbols in the figure:

[0075] 1. First component; 2. Second component; 3. Antenna module; 4. Upper shell; 5. Lower shell; 6. Support mechanism; 7. Transfer mechanism; 8. Testing mechanism; 81. Product positioning fixture; 82. Carrier bottom plate; 83. Carrier cylinder; 84. Clamping cylinder; 85. Press plate assembly; 86. Crank-connecting rod mechanism; 9. Transfer robot; 10. Material picking robot; 11. Buffer area; 12. EOLT work area; 13. Airtight test work area; 14. First working platform; 15. Second working platform; 16. Buffer platform; 17. Product carrier; 18. Intermediate carrier; 19. Gripper unit; 20. Vacuum suction cup; 21. Lifting cylinder; 22. Conveyor belt for tested products; 23. Slideway for defective products; 24. Retest mechanism; 25. EOLT rework and retest position; 26. Airtight test rework and retest position; 27. Retest support plate; 28. Retest support tooling. DETAILED DESCRIPTION

[0076] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the following is a further detailed description of an automotive parts airtight structure, an airtight detection device and a detection control method thereof provided by the present application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0077] Embodiment 1

[0078] See also Figure 1An embodiment of the present invention provides an airtight structure of an automobile part, including a first component 1 and a second component 2, a closed space is provided between the first component 1 and the second component 2, an antenna module 3 is provided in the closed space, the first component 1 and the second component 2 are contact-connected, and the connection between the first component 1 and the second component 2 is sealed by compression welding.

[0079] The airtight structure of automobile parts provided by the present invention adopts laser welding to connect the first component 1 and the second component 2, and has stable connection and good airtightness, and has excellent protection against liquid and solid particles. It can not only prevent dust penetration, but also the sealing performance can prevent short-term immersion, has good anti-immersion performance, and is reliable and stable to use.

[0080] Specifically, the airtight structure of automobile parts provided by the embodiment of the present invention is a UWB antenna module, which is used for the digital key of the PEPS of the automobile. The UWB antenna module acts as a prover in the communication with the flight time measurement key. The UWB antenna module is configured with a CAN interface for receiving commands; the UWB antenna module is also configured with a radio frequency interface for communication via radio frequency pulses.

[0081] like Figure 2 As shown, the UWB antenna module includes an upper shell 4 and a lower shell 5, an antenna module 3 is arranged between the upper shell 4 and the lower shell 5, the antenna module 3 is provided with a PCB board, the upper shell 4 as the first component and the lower shell 5 as the second component are welded and connected by laser welding equipment, a module space is arranged in the lower shell 5, the upper shell 4 is arranged on the upper end surface of the lower shell 5, the upper shell 4 is used to close the internal space of the lower shell 5, and the outer periphery of the upper shell 4 is welded and connected to the lower shell 5 by laser welding equipment.

[0082] In this embodiment, the laser welding equipment used is a general-purpose laser welding machine, which is integrated with the production of the product and the back-end airtightness detection production line. The internal cavity of the laser welding machine is provided with two welding stations, which can weld two parts at the same time. The laser welding machine is provided with a fixture, which includes an upper fixture and a lower fixture. The UWB antenna module is arranged between the upper fixture and the lower fixture. The lower fixture can carry the product and support and position the UWB antenna module structure. The upper fixture presses the UWB antenna module structure and the pressing area of ​​the upper fixture is composed of a projection layer material.

[0083] Furthermore, the first component is arranged on the second component, the welding laser passes through the upper fixture and the first component, melts the outer edge of the second component located at the bottom, and then presses the second component and the outer edge of the first component together, the welding and pressing area of ​​the first component and the second component is arranged along the outer edge thereof, and the laser welding track is a rectangular outline with rounded corners, such as Figure 3 shown.

[0084] Specifically, in the present embodiment, the upper shell 4 of the product is white, and the lower shell 5 is gray. The outer rings of the upper shell 4 of the product are in contact with the lower shell. The outer periphery of the upper tooling fixture presses the surrounding area of ​​the upper shell, and the center of the fixture is crimped to the middle part of the upper shell 4 to ensure that the laser of the laser welding machine can penetrate from above the upper tooling. The light beam penetrates the upper shell 4 of the product and melts the lower shell 5 located below it, thereby realizing the press-fit connection between the upper shell 4 and the lower shell 5.

[0085] The middle area of ​​the upper fixture is a glass fixture, which can ensure laser penetration and can melt the outer circle of the lower shell through the upper shell. It melts while welding, so that the outside of the product is subjected to upper and lower pressure. A lifting cylinder is installed at the bottom of the equipment, which acts upward and supports the product. During the welding process, the upper shell does not melt, but the lower shell of the product melts. Under the lifting action of the lifting cylinder, the lower fixture moves upward while welding.

[0086] Furthermore, a displacement sensor is fixedly installed at the bottom of the equipment tooling, which can read the position data of the product lifting in real time, and the through-hole control center monitors the melting collapse value of the product during the welding process.

[0087] Embodiment 2

[0088] Further, such as Figure 4 As shown, an embodiment of the present invention provides an airtight detection device for an airtight structure of an automobile part, comprising a supporting mechanism 6, a transfer mechanism 7 and a testing mechanism 8, and also comprising a control system, the control system controlling the actions of the transfer mechanism 7 and the testing mechanism 8, the transfer mechanism 7 comprising a transfer manipulator 9 and a material taking manipulator 10, the transfer manipulator 9 is connected to a product EOLT detection device, the material taking manipulator 10 is in communication with the testing mechanism 8, and a buffer area 11 is provided between the transfer manipulator 9 and the material taking manipulator 10;

[0089] The testing mechanism 8 includes an airtight testing part and a product positioning fixture 81 , and the material taking robot 10 is connected to the buffer area 11 and the product positioning fixture 81 .

[0090] The embodiment of the present invention realizes the airtightness detection of the product after laser welding through the airtightness detection device. Under the action of the control system, a fast and stable airtightness test is realized, the production efficiency and process rhythm are optimized, the full-process automatic loader test is realized, and manual participation is reduced; by setting a buffer area 11 between the transfer robot 9 and the material picking robot 10, an orderly connection between the loading process and the detection process is realized, the product transfer and detection and material picking are carried out simultaneously, and the product automatic airtightness detection is realized. The two robots cooperate with each other and do not interfere with each other, thereby improving the detection efficiency.

[0091] Specifically, the production of UWB antenna modules must meet certain sealing performance and specified protection safety levels, and must meet the IP67 standard. IP67 means meeting the following requirements: protection against dust inhalation (overall protection against contact, protection against dust penetration), and protection against short-term immersion (anti-immersion). The evaluation method is to conduct airtightness testing on the product, using methods such as pressure change detection to conduct airtightness testing, and evaluate the sealing performance of the product by applying pressure and monitoring pressure changes.

[0092] In this embodiment, the support mechanism 6 is composed of a support frame and a support plate. The airtightness detection device is arranged in the internal space formed by the support mechanism 6 and is supported and connected by supporting structures such as the support frame and the support plate.

[0093] In this embodiment, Figure 5 As shown, the airtight detection device is arranged at the rear end of the EOLT production line, and the end of the EOLT production line is connected to the product EOLT detection equipment. EOLT refers to the production line terminal test system, which is a system for comprehensive inspection and testing at the final stage of the product manufacturing process to ensure product quality. The airtight detection device is provided with an EOLT work area 12 and an airtight test work area 13. The EOLT work area 12 is arranged adjacent to the airtight test work area 13, and the buffer area 11 is arranged between the EOLT work area 12 and the airtight test work area 13. The transfer robot 9 is arranged in the EOLT work area 12, and the material taking robot 10 is arranged in the airtight test work area 13.

[0094] Specifically, the EOLT work area 12 is provided with a first working platform 14, which is horizontally arranged, and the bottom end of the transfer robot 9 is fixedly arranged on the first working platform 14, and the transfer robot 9 is used to connect the EOLT production line with the buffer area 11. The airtight test work area 13 is provided with a second working platform 15, which is horizontally arranged, and the bottom end of the material-retrieving robot 10 is fixedly arranged on the second working platform 15, and the material-retrieving robot 10 is used to connect the buffer area 11 with the testing mechanism 8, so that under the coordinated cooperation of the transfer robot 9 and the material-retrieving robot 10, the control system accurately controls the movement of the robot, and each robot independently realizes the product transfer of its own work area, and cooperates with each other to realize the product cycle from the front-end production line to the buffer area 11, and then moves to the airtight test work area 13 for airtight testing of the product.

[0095] In this embodiment, Figure 6 As shown, the cache area 11 is provided with a cache platform 16, which is horizontally arranged. The cache platform 16 has a square structure, and the specific shape can be adapted and adjusted according to the actual use requirements of different products. The lower end of the cache platform 16 is supported by a supporting component, and its position can be flexibly adjusted as needed, so as to adapt to the travel of different robots and product processing and detection requirements.

[0096] The cache platform 16 is provided with a product carrier 17, and the product carrier 17 is provided with a product positioning component and an optoelectronic component. When a product is placed on the product carrier 17, the product is placed on the upper end of the optoelectronic component; two product carriers 17 are adjacently provided on the cache platform 16, and two products can be transferred at the same time, thereby improving work efficiency. The product carrier 17 is provided with a plurality of product positioning blocks, which are product positioning components. The plurality of product positioning blocks are provided on the product carrier 17, and the product positioning blocks are provided with supporting grooves adapted to the products, so that the plurality of product positioning blocks cooperate to position and support the products, and can limit the products to prevent them from moving.

[0097] Furthermore, as a preferred embodiment of the present invention, two spare intermediate carriers 18 are also provided on the cache platform 16, and the product carrier 17 and the intermediate carrier 18 are respectively arranged on both sides of the cache platform 16, and the intermediate carrier 18 is within the travel range of the transfer robot 9 and the material picking robot 10, and is used for temporary placement of products.

[0098] In this embodiment, Figure 7 As shown, the end of the transfer robot 9 is provided with a clamping part, and the clamping part is provided with two clamping units 19 and a cylinder for driving the clamping unit 19 to clamp. A spacing is provided between the two clamping units 19 to prevent the transferred products from interfering with each other. The transfer robot 9 can drive the clamping part to rotate and move in space. The transfer robot 9 clamps the product through the two clamping units 19, and then cooperates with each other to realize the simultaneous transfer of two products, and transfers the two products to be inspected to the two product carriers 17 of the cache platform 16 respectively.

[0099] like Figure 8 As shown, the end of the material-retrieving manipulator 10 is provided with a suction cup assembly, and the suction cup assembly is provided with four groups of vacuum suction cups 20, which are arranged opposite to each other, two groups of which are for retrieving materials and two groups of which are for discharging materials. There is a gap between the four groups of vacuum suction cups 20 to prevent the transfer products from interfering with each other; the material-retrieving manipulator 10 can drive the suction cup assembly to rotate and move in space, and the four groups of vacuum suction cups 20 are respectively arranged on both sides of the end of the material-retrieving manipulator 10, and two groups of vacuum suction cups 20 are evenly arranged on each side. The material-retrieving manipulator 10 can drive the vacuum suction cups 20 to rotate, thereby completing the replacement of retrieving and discharging materials. The vacuum suction cups 20 simultaneously absorb the two products on the product carrier 17 of the buffer platform 16, and then place them on the platform of the testing mechanism 8 for testing, wherein two groups of vacuum suction cups 20 are for discharging materials, and the other two groups of vacuum suction cups 20 are for testing to complete the product retrieving, without interfering with each other, to achieve the orderly connection of different program nodes of the product, improve the detection efficiency, achieve the matching of the production rhythm of the front and back sections, and achieve the maximum utilization rate of the product airtight test.

[0100] Specifically, the upper end of each vacuum suction cup 20 is connected to a lifting cylinder 21, and the lifting cylinder 21 can drive the vacuum suction cup 20 to move up and down.

[0101] Furthermore, in the present embodiment, the suction cup assembly and the clamping jaw portion are provided in correspondence, and the number of the two is matched. In actual use, they can be adapted and adjusted according to the actual number of products to be inspected and the program requirements of the control system. The number of clamping jaw units 19 of the transfer robot and the number of groups of vacuum suction cups 20 of the material picking robot 10 can be increased or decreased accordingly.

[0102] In this embodiment, as shown in FIG. Figure 4 , Figure 5 , Fig. 9 As shown, the testing mechanism 8 is arranged on the second working platform 15. The testing mechanism 8 includes an airtight testing part and a product positioning fixture 81. The airtight testing part is provided with an airtight testing instrument. The testing mechanism 8 performs a product airtight test through the airtight testing instrument.

[0103] Specifically, the lower end of the product positioning fixture 81 is connected to a carrier base plate 82, the carrier base plate 82 is horizontally arranged, and the carrier base plate 82 is arranged on the second working platform 15 through a test support plate, and the side of the carrier base plate 82 is connected to a test-completed product conveyor belt 22 and a defective product chute 23, and the test-completed product conveyor belt 11 and the carrier base plate 82 are arranged perpendicular to each other, and the products that have passed the test by the testing organization 8 are transferred to the test-completed product conveyor belt 22 for further transmission, and the defective products that have failed the test are transferred to the defective product chute 23 for subsequent collection and processing.

[0104] In this embodiment, the product positioning fixture 81 on the upper end of the carrier base plate 82 is a test station for supporting the product to be tested and performing product testing. Two product positioning fixtures 81 are adjacently arranged on the carrier base plate 82. The distance between the center positions of the two product positioning fixtures 81 is adapted to the distance between the two groups of vacuum suction cups 20 arranged on the same side of the material picking robot 10, so that the material picking robot 10 can stably transfer the two products to be tested from the buffer area 11 to the two product positioning fixtures 81.

[0105] Specifically, Fig. 9 As shown, the product positioning jig 81 is provided with a supporting groove for supporting the product, and the structure of the supporting groove is adapted to the lower end surface of the product. The side of the product positioning jig 81 is provided with a carrier cylinder 83 corresponding to its supporting groove, and the carrier cylinder 83 is fixedly set on the carrier bottom plate 82. The carrier cylinder 83 can press against the product positioning jig 81 to prevent it from displacement, thereby ensuring the accuracy of product testing.

[0106] Furthermore, the product positioning fixture 81 is also connected to a product clamping mechanism, which includes a clamping cylinder 84. The clamping cylinder 84 is vertically arranged and the lower end of the clamping cylinder 84 is fixedly arranged on the carrier bottom plate 82. The upper end of the clamping cylinder 84 is connected to a pressure plate assembly 85 through a connecting part, and the connecting part is a crank-connecting rod mechanism 86. The pressure plate assembly 85 is fixedly connected to the crank-connecting rod mechanism 86. The clamping cylinder 84 can drive the pressure plate assembly 85 to perform a 0-135° clamping angle action. The up and down linear motion of the clamping cylinder 84 can drive the crank-connecting rod mechanism 86 to rotate, so that the clamping arm of the crank-connecting rod mechanism 86 and the pressure plate assembly 85 are maintained in the clamping position, so that the clamping cylinder 84 can drive the pressure plate assembly 85 to rotate to the upper end of the product of the two product positioning fixtures 81, and then the product is compressed, and then the product is tested for air tightness by an airtight testing instrument.

[0107] Furthermore, in the present embodiment, a product clamping mechanism is connected to the side of each product positioning fixture 81 to clamp and limit the product on the product positioning fixture 81 on its side to ensure the airtight test effect.

[0108] Furthermore, the product positioning jig 81 is connected to a quick-change tooling. By designing the product positioning jig 81 as a quick-change tooling form, different products can be adapted according to needs. When new products need to be tested, only different jigs need to be replaced to be compatible with products of different models. The area of ​​the test station or the number of product positioning jigs can also be increased according to actual usage needs.

[0109] Furthermore, Figure 4 , Fig.10 As shown, as a preferred embodiment of the invention, the testing mechanism 8 also includes a re-testing mechanism 24, which is arranged on the side of the carrier bottom plate 82 and is arranged parallel to the conveyor belt 22 of the tested product. The re-testing mechanism 24 includes a re-testing product moving part and a re-testing support tooling, and the re-testing support tooling is arranged within the movement range of the transfer robot 9 and the material picking robot 10.

[0110] Specifically, the re-test mechanism 24 is provided with an EOLT rework and re-test position 25 and an airtight test rework and re-test position 26, and the re-test product moving part is provided with a re-test support plate 27, the re-test support plate 27 is horizontally arranged and the re-test support plate 27 is parallel to the test completed product conveyor belt 22, and the EOLT rework and re-test position 25 and the airtight test rework and re-test position 26 are both arranged on the re-test support plate 27; the lower end of the re-test support plate 27 is connected to a slide rail moving mechanism, and the end of the slide rail moving mechanism is connected to a push-pull cylinder, which drives the re-test support plate 27 to be arranged along the axial direction of the slide rail moving mechanism, and pushes the re-test support plate 27 and the re-test product thereon to within the travel range of the two manipulators, so that the transfer manipulator 9 or the material picking manipulator 10 can re-test and load the materials, and re-perform relevant testing work.

[0111] In this embodiment, the EOLT rework and re-measurement position 25 and the airtight test rework and re-measurement position 26 are both provided with two adjacent re-measurement support fixtures 28, and the re-measurement support fixtures 28 are provided with product support stations for positioning and supporting the re-measured products.

[0112] Furthermore, the retest mechanism 24 may also adopt a manual drawer-type rework and retest tooling to facilitate the staff to perform corresponding operations.

[0113] Furthermore, the transfer equipment used in the embodiment of the present invention uses a conveyor belt to transport products on the production line. At the same time, the transfer equipment can also use other means such as roller conveyors and chain conveyors. The chain conveyor can use the chain to pull and carry, or the slats, metal mesh belts, rollers, etc. installed on the chain can carry products. The operation is efficient and convenient, and different products can be transferred or transported.

[0114] Furthermore, as a preferred embodiment of the present invention, the airtight detection device and its connected production line adopt a frame support structure, which is used to support various structures. At the same time, various equipment of the production line are arranged in the internal space of the frame support structure, and product processing, transportation, detection and other operations are carried out in the internal space. A protective shell is provided on the outside of the frame support mechanism, which is used to protect the internal equipment and protect the safety of the staff; the protective shell is composed of stainless steel materials and transparent glass materials, and the transparent glass material can facilitate the staff to monitor and detect the working conditions of the internal equipment; the periphery of the frame support structure is provided with a viewing window and an inspection door, which can be opened to inspect and maintain the internal equipment as needed.

[0115] In this embodiment, the transfer robot 9 and the material picking robot 10 cooperate with each other to realize the loading, clamping and unloading of products, realize multi-robot collaboration, improve production efficiency, reduce production costs, ensure the stability of product transportation, ensure the uniformity of operations, and realize the implementation and transmission of the automated production process through the control system. It not only ensures the real-time sharing and real-time transmission of data between the upper computer and the lower computer, but also accurately controls the independent actions of the two robots without interfering with each other, thereby ensuring the stability of the robot operation, and at the same time realizes the orderly connection of different program nodes of the product, improves the detection efficiency, realizes the matching of the front and back production rhythms, and realizes the maximum utilization rate of the product airtight testing.

[0116] Furthermore, in this embodiment, if Fig.11 As shown, the control system includes a control terminal and a test PC end. The control terminal and the test PC end use a two-way communication method to exchange two-way data. The test PC end is connected to a test organization.

[0117] Specifically, the control system controls the actions of various equipment in the EOLT work area and the airtight test work area at the same time. The control terminal is equipped with a PLC system, and the test PC end is equipped with a terminal test machine PC and an airtight test machine PC. The PLC system is connected to the terminal test machine PC and the airtight test machine PC in a two-way communication manner. At the same time, the PLC system controls the actions of the transfer robot and the material picking robot. The terminal test machine PC is connected to a terminal test instrument and a laser engraving machine, and the airtight test machine PC is connected to an airtight test instrument and a code reader.

[0118] In this embodiment, the terminal tester PC, the airtight tester PC, the transfer manipulator, and the material retrieving manipulator all exchange data bidirectionally with the PLC system. The PLC system combines the real-time kernel (Runtime) with the reliable FreeBSD open source operating system, and is equipped with corresponding accessory components, equipment control, process control and logistics system control, networking of equipment components, data acquisition and image processing. PC-based control technology can provide excellent scalability and flexibility for traditional control tasks.

[0119] The terminal test machine PC communicates directly with the terminal test instrument and feeds back the measurement results to the terminal PC. If the test is OK, the laser machine will laser engrave the corresponding product information and the DMC code. The airtight test machine PC communicates directly with the airtight tester and feeds back the measurement results to the airtight PC. At the same time, the barcode reader identifies the laser-engraved DMC code and parses it during this process, and feeds back to the airtight test machine. The barcode reader reads the DMC code on the surface of the product. This DMC is generated by laser engraving at the terminal test station and read at the airtight test station.

[0120] In this embodiment, the two gripper units provided at the front end of the transfer robot are directly controlled by the robot, which is convenient for direct control of the robot's action logic. The PLC system control terminal as the control terminal directly outputs IO, which includes two parts: the front end control cylinder + vacuum suction cup + blowing of the material picking robot and its corresponding feedback sensor, the peripheral control part and its auxiliary sensor; the indirect control of the material picking robot is due to the fact that the robot itself has fewer IO control signals. The material picking robot directly controls the action of the front end vacuum suction cup, and the PLC system does not participate in the control.

[0121] The material-retrieving robot can send instructions and obtain information directly to the IO of the PLC system through Profibus communication. The final effect is that the front end of the robot controls 4 cylinders + 4 vacuum suction cups + 4 air blows connected to the PLC, but is directly controlled by the instructions of the material-retrieving robot.

[0122] In this embodiment, the logic of picking, grabbing, etc. required by the manipulator is defined as a separate sequence. For example, the material-picking manipulator is defined as 11 action sequences, and the action sequences of the material-picking manipulator include the following:

[0123] a) If (iTask% = 1) Then GoTo*Homing Task 1, the robot returns to the initial origin position;

[0124] b) If (iTask% = 2) Then GoTo*Service task 2, the manipulator returns to the maintenance service position;

[0125] c) If (iTask% = 3) Then GoTo*DropPart Task 3, the robot goes to the drop-part location;

[0126] d) If (iTask% = 4) Then GoTo*MoveToSafety task 4, the manipulator returns to a safe position;

[0127] e) If (iTask% = 5) Then GoTo*PickFromCarrier1 Task 5, the robot picks up the material from tooling 1;

[0128] f) If (iTask% = 6) Then GoTo*PickFromCarrier2 Task 6, the robot picks up the material from tooling 2;

[0129] g) If (iTask% = 7) Then GoTo*PlaceToLeakage Task 7, the robot puts the material to the airtightness detection station;

[0130] h) If (iTask% = 8) Then GoTo*PickFromLeakage Task 8, the robot picks up the material from the airtightness detection station;

[0131] i) If (iTask% = 9) Then GoTo*PlaceToNOKBox Task 9, the robot puts the material to the defective product slide;

[0132] j) If (iTask% = 10) Then GoTo*PlaceToOKConveyor Task 10, the robot puts the material on the good product conveyor belt;

[0133] k)If (iTask% = 11)Then GoTo*ReworkPickfromRetryTask 11, the robot retests the rework process and picks up the material.

[0134] Each action sequence includes logical interactions with the PLC system, including point-to-point trajectory movements during the operation of the robot, and the controller of the robot cylinder + vacuum suction cup + blowing.

[0135] For example, Figure 12-14As shown, in the above task 5, the manipulator picks up the material from the tooling 1. This action sequence is divided into multiple action steps, specifically including the following steps:

[0136] Step 1, robot operation speed: fast 100% rate;

[0137] Step 2, the manipulator reaches the initial preparation position;

[0138] Step 3: The robot moves horizontally to +240mm above the position of tooling 1;

[0139] Step 4: The two cylinders at the front end of the manipulator descend;

[0140] Step 5: The manipulator moves vertically to +15mm above the position of tooling 1;

[0141] Step 6, robot operation speed: low speed 5% rate;

[0142] Step 7, the manipulator moves vertically to the tooling 1 position;

[0143] Step 8, determine whether there are products on the left and right sides of the tooling (left side, case 1; right side, case 2; both left and right sides, case 3);

[0144] Step 9, open the vacuum valve based on the judgment in the previous step, and pick up the product with the help of vacuum;

[0145] Step 10, the front two cylinders rise;

[0146] Step 11, robot operation speed: fast 100% rate;

[0147] Step 12, the manipulator moves vertically to +240mm above the position of tooling 1;

[0148] Step 13: The robot returns to the initial preparation position.

[0149] The above 13 steps are the action sequence of Task 5, and other corresponding action sequences also have their corresponding operation steps.

[0150] Furthermore, Fig.15 As shown, the manual control interface of the action sequence of robot task 5 is displayed. The PC end of the control system can control the switching of the manual control screen of the machine. Any action sequence of the robot can be manually triggered to realize the complete process of this action sequence. The overall automatic process of the equipment only needs to call each robot action sequence to realize automatic logic, which is easy to control.

[0151] Furthermore, in this embodiment, the control system can customize the standard communication encapsulation function for communication between the PLC and the manipulator. Since the sorting action process of the machine is relatively complex, developing standard function blocks at the PLC end means defining a set of standard signal communication processes. When related actions are involved in the future, only relevant changes need to be made for use.

[0152] As Fig.16 shown, in this embodiment, there are five branch actions in the operation logic of the airtight test mechanism, which are: picking materials from fixture 1; picking materials from fixture 2; waiting for the airtight tester to end; rework and retest process; start-up process. At "selection", it is discussed in 5 cases, choosing 1 out of 5, and they cannot be executed simultaneously. Furthermore, the control terminal judges the running branch, and each branch can jump to each other.

[0153] Running according to the branch, the control system calls the encapsulated standard communication process, then enters the underlying processing process to communicate with the manipulator, and then calls the motion sequence of the manipulator to achieve the action.

[0154] As Fig.17 shown, if running according to the first branch, PickFromCarrierA, the PLC calls the encapsulated standard communication process, then enters the underlying processing process to communicate with the manipulator, and then calls the motion sequence 5 of the manipulator to achieve the purpose of executing this one action.

[0155] Specifically, call the 10th item of the encapsulated standard communication process to change variables and parameters, then enter the 10th item of the PLC underlying processing process, the 10th item of the two-way communication between the PLC and the manipulator, then call the 8th item of the manipulator action sequence, and then call the motion sequence task 5 of the manipulator. At the same time, the manipulator action sequence task 6 can be sequentially mobilized, and other action sequence tasks of the manipulator can be called according to the parameters.

[0156] Embodiment III

[0157] Further, as Fig.18 shown, the embodiment of the present invention also provides a method for detecting and controlling the airtight structure of automotive parts. The airtight detection includes the following steps:

[0158] Filling, inflating gas between the first component and the second component of the airtight structure of the automotive part;

[0159] Maintaining, after the inflation is completed, after maintaining for a period of time, measuring the gas leakage value.

[0160] In this embodiment, the sealing performance of the laser welding of the upper shell and the lower shell of the product is detected by an airtight testing instrument. The ATEQ F620 compact leak detector is used for airtight testing. It is specially used for fully automatic and semi-automatic workbenches. Its basic principle is to test the slight change or drop in the differential pressure between two test and standard parts filled with equal pressure.

[0161] When the airtight test instrument is testing, the inflation level is maintained at 60 kPa, the inflation time is 6 seconds, the holding time is 5 seconds, and the leakage time is 5 seconds. When the inflation level is reached, the measured value is the holding value. After the holding time is over, the measured value starts to be measured. After the leakage time, the leakage value is measured.

[0162] Furthermore, Fig.19 As shown in the figure, the test process includes five stages, namely: delay stage (WAIT), filling stage (FILL), stabilization stage (STABILIZATION), test stage (TEST), and exhaust stage (DUMP). The product air tightness test is completed through the test instrument.

[0163] The airtight structure of automobile parts provided by the present invention adopts laser welding to connect the first component and the second component, and has stable connection and good airtightness, and has excellent protection ability against liquid and solid particles. It can not only prevent dust penetration but also has sealing performance that can prevent short-term immersion, has good anti-immersion performance, and is reliable and stable to use.

[0164] The present invention realizes the airtightness detection of the product after laser welding through the airtightness detection device. Under the action of the control system, a fast and stable airtightness test is realized, the production efficiency and process rhythm are optimized, the full-process automatic feeder test is realized, and manual participation is reduced; by setting a buffer area between the transfer manipulator and the material taking manipulator, the orderly connection between the loading process and the detection process is realized, the product transfer and the detection and material taking are carried out simultaneously, and the automatic airtightness detection of the product is realized. The two manipulators cooperate with each other without interfering with each other, thereby improving the detection efficiency.

[0165] The present invention adopts the transfer robot 9 and the material picking robot 10 to cooperate with each other to realize the loading, clamping and unloading of products, realize multi-robot collaboration, improve production efficiency, reduce production costs, ensure the stability of product transportation, ensure the uniformity of operations, and realize the implementation and transmission of the automated production process through the control system. It not only ensures the real-time sharing and real-time transmission of data between the upper computer and the lower computer, but also accurately controls the independent actions of the two robots without interfering with each other, thereby ensuring the stability of the robot operation, and at the same time realizes the orderly connection of different program nodes of the product, improves the detection efficiency, realizes the matching of the front and back production rhythms, and realizes the maximum utilization rate of the product airtight testing.

[0166] In the description of the present invention, it is necessary to understand that the orientation or positional relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0167] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0168] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An airtight structure for automobile parts, comprising a first component and a second component, characterized in that: A closed space is provided between the first component and the second component, an antenna module is provided in the closed space, the first component and the second component are in contact and connected, and the connection between the first component and the second component is sealed by compression welding.

2. The airtight structure of automobile parts according to claim 1, characterized in that: The first component and the second component are welded by laser welding equipment, the laser welding equipment is provided with a fixture, the fixture comprises an upper fixture and a lower fixture, the airtight structure of the automobile part is arranged between the upper fixture and the lower fixture, the lower fixture supports and positions the airtight structure of the automobile part, the upper fixture presses the airtight structure of the automobile part, and the pressing area of ​​the upper fixture is composed of a projection layer material; The first component is arranged on the second component, and the welding laser passes through the upper fixture and the first component to melt the outer edge of the second component located at the bottom, and then the second component is pressed and connected with the outer edge of the first component. The welding and pressing area between the first component and the second component is arranged along their outer edges, and the laser welding track is a rectangular outline with rounded corners.

3. An airtightness detection device for an airtight structure of an automobile part, comprising a supporting mechanism, a transporting mechanism and a testing mechanism, characterized in that: It also includes a control system, which controls the actions of the transfer mechanism and the testing mechanism. The transfer mechanism includes a transfer manipulator and a material-retrieving manipulator. The transfer manipulator is connected to the product EOLT testing equipment, and the material-retrieving manipulator is in communication with the testing mechanism. A buffer area is provided between the transfer manipulator and the material-retrieving manipulator. The testing mechanism includes an airtight testing part and a product positioning fixture, and the material taking robot is connected to the buffer area and the product positioning fixture.

4. The airtightness detection device for the airtight structure of automobile parts according to claim 3, characterized in that: The cache area is provided with a cache platform, the cache platform is provided with a product carrier, and the product carrier is provided with a product positioning component; The testing mechanism is provided with an airtight testing instrument, and the product positioning fixture is connected with a product clamping mechanism and a quick-change tooling.

5. The airtightness detection device for the airtight structure of automobile parts according to claim 3, characterized in that: The transfer robot is connected to a gripping portion, the material taking robot is connected to a vacuum suction cup, and the vacuum suction cup is connected to a driving mechanism that moves along the axial direction of the vacuum suction cup; The vacuum suction cups are provided in multiple groups, and include at least one group of loading suction cups and one group of unloading suction cups.

6. The airtightness detection device for the airtight structure of automobile parts according to claim 3, characterized in that: It also includes a re-test mechanism, which includes a re-test product moving part and a re-test support tooling, and the re-test support tooling is arranged within the movement range of the transfer robot and the material picking robot.

7. The airtightness detection device for the airtight structure of automobile parts according to claim 3, characterized in that: The control system includes a control terminal and a test PC end, the control terminal and the test PC end adopt a two-way communication mode to perform two-way data exchange, and the test PC end is connected to the test mechanism; The direct output IO of the control terminal includes two parts: the front-end control cylinder + vacuum suction cup + air blowing of the material picking manipulator and its corresponding feedback sensor, the peripheral control part and its auxiliary sensor; The action sequence of the reclaiming robot includes: Task 1: The robot returns to the initial origin position; Task 2, the manipulator returns to the maintenance service position; Task 3, the robot goes to the location where the item is lost; Task 4, the manipulator returns to a safe position; Task 5, the robot picks up materials from tooling 1; Task 6, the robot picks up materials from tooling 2; Task 7, the robot puts the material into the airtightness testing station; Task 8, the robot picks up materials from the airtightness testing station; Task 9, the robot puts the material into the defective box; Task 10: The robot puts the material on the good product conveyor belt; Task 11, the robot picks up materials during the rework process; Each action sequence includes logical interactions with the control terminal, including point-to-point trajectory actions during the operation of the robot, and the controller of the robot cylinder + vacuum suction cup + blowing; The action sequence of Task 5 includes the following steps: Step 1, robot operation speed: fast 100% rate; Step 2, the manipulator reaches the initial preparation position; Step 3: The robot moves horizontally to the position above tooling 1 by +240mm; Step 4: The two cylinders at the front end of the manipulator descend; Step 5: The manipulator moves vertically to +15mm above the position of tooling 1; Step 6, robot operation speed: low speed 5% rate; Step 7, the manipulator moves vertically to the tooling 1 position; Step 8, determine whether there are products on the left and right sides of the tooling; Step 9, open the vacuum valve based on the judgment in the previous step, and pick up the product with the help of vacuum; Step 10, the front two cylinders rise; Step 11, robot operation speed: fast 100% rate; Step 12, the manipulator moves vertically to +240mm above the position of tooling 1; Step 13: The robot returns to the initial preparation position.

8. The airtightness detection device for the airtight structure of automobile parts according to claim 7, characterized in that: There are five branch actions in the operation logic of the detection device, namely: taking materials from tooling 1; taking materials from tooling 2; waiting for the airtightness tester to end; rework and retesting process; start-up process, and then judge the operation branch through the control terminal. Each branch can jump to each other and run according to the branch. The control system calls the encapsulated standard communication process, then enters the underlying processing process to communicate with the robot, and then calls the robot's motion sequence to execute the action.

9. A method for detecting and controlling the airtight structure of automobile parts, characterized in that: The airtightness test includes the following steps: Filling, inflating air between the first component and the second component of the airtight structure of the automobile part; Hold, after inflation is completed, hold for a period of time and measure the gas leakage value.

10. The method for detecting and controlling the airtight structure of automobile parts according to claim 9, characterized in that: The test process includes five stages: delay stage, inflation stage, stabilization stage, test stage, and exhaust stage; When the testing agency conducts the test, the inflation level is maintained at 60 kPa, the inflation time is 6 seconds, the holding time is 5 seconds, and the leakage time is 5 seconds. When the inflation level is reached, the measured value is the holding value. After the holding time is over, the measured value starts to be measured. After the leakage time, the leakage value is measured.

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