An automated flowline for PLC function testing

Abstract

The application relates to an automatic flow line for PLC function test, which comprises a test area, an upper feeding area and a lower feeding area arranged at two ends of the test area respectively, and a plurality of test fixtures for placing products to be tested; the test area comprises a test conveying line, A-machine-type test areas and B-machine-type test areas arranged at one side of the test conveying line respectively, and at least two test trolleys arranged on the test conveying line and located at the A-machine-type test areas and the B-machine-type test areas respectively; the upper feeding area comprises A-machine-type upper feeding stations and B-machine-type upper feeding stations, and A-machine-type upper feeding conveying lines and B-machine-type upper feeding conveying lines; the lower feeding area comprises A-machine-type lower feeding stations and B-machine-type lower feeding stations, and B-machine-type lower feeding conveying lines and A-machine-type lower feeding conveying lines; the application can test two different machine types of products simultaneously, realizes a mixed flow test function through intelligent control, and achieves efficient output of small-batch product test.

Description

Technical Field

[0001] This invention relates to the field of PLC testing, and specifically to an automated workflow for PLC functional testing. Background Technology

[0002] Before leaving the factory, PLCs need to undergo various tests, such as character recognition tests, high-voltage tests, and product performance tests. During testing, external detectors need to be connected to the PLC through corresponding connectors to monitor the PLC's external and internal status in real time.

[0003] For example, the PLC testing component disclosed in prior art 202223400020.7, although slightly more efficient than manual testing by operators, has a relatively limited testing function and can only test a single type of machine. Testing different functions or types of machines requires different equipment, which not only greatly increases testing costs and occupies factory space, but also means that most test transfers are currently done manually, which is time-consuming, labor-intensive, and has a high labor intensity. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automated workflow for PLC functional testing.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: an automated flow line for PLC functional testing, comprising a testing area, a loading area and a unloading area respectively set at both ends of the testing area, and multiple test fixtures for placing the products to be tested; The test area includes a test frame, a test conveyor line set on the test frame, a test area for model A and a test area for model B respectively set on one side of the test conveyor line, a transition area set between the test area for model A and the test area for model B, and at least two test trolleys set on the test conveyor line and located in the test area for model A and the test area for model B respectively. The feeding area is located on one side of the A-type test area, including a feeding frame, an A-type feeding station and a B-type feeding station respectively set on the feeding frame, an A-type feeding conveyor line set on the feeding frame and flush with the test conveyor line, and a B-type feeding conveyor line set directly below the A-type feeding conveyor line and passing through the A-type test area. The unloading area is located on one side of the B-type test area and includes an unloading frame, an A-type unloading station and a B-type unloading station respectively set on the unloading frame, a B-type unloading conveyor line set on the unloading frame and flush with the test conveyor line, and an A-type unloading conveyor line set directly below the test conveyor line and passing through the B-type test area.

[0006] Preferably, the A-type feeding conveyor line is a double-row belt conveyor line, and an A-type lifting and translating unit is set at one end of the conveyor line near the test conveyor line; the A-type feeding station is set at the other end of the A-type feeding conveyor line. The B-type machine feeding station is equipped with a B-type first feeding lifting and reversing machine; the conversion area is equipped with a B-type second feeding lifting and reversing machine; the B-type machine feeding conveyor line adopts a double-row belt conveyor line, with its two ends connected to the B-type first feeding lifting and reversing machine and the B-type second feeding lifting and reversing machine respectively.

[0007] Preferably, the B-type unloading conveyor line adopts a lifting and reversing device; the B-type unloading station is located at the discharge end of the B-type unloading conveyor line; The conversion area is equipped with a first unloading lifting and reversing machine for machine type A; a second unloading lifting and reversing machine for machine type A is installed next to the unloading station of machine type A; the unloading conveyor line for machine type A adopts a double-row belt conveyor line, with its two ends connected to the first unloading lifting and reversing machine for machine type A and the second unloading lifting and reversing machine for machine type A, respectively.

[0008] Preferably, it also includes a return conveyor line; the return conveyor line includes a common return conveyor line located directly below the A-type feeding conveyor line, an A-type return conveyor line and a B-type return conveyor line respectively located directly below the test conveyor line and at the discharge end of the common return conveyor line, and a sorting device located at the discharge end of the common return conveyor line for sorting and returning according to the type of machine.

[0009] Preferably, the A-type unloading station is equipped with an A-type return feeding lifting conveyor; the B-type unloading station is equipped with a B-type return feeding lifting reversing machine; the common return conveyor line adopts a double-row belt conveyor line, wherein return lifting and translation units corresponding to the A-type return feeding lifting conveyor and the B-type return feeding lifting reversing machine are respectively provided.

[0010] Preferably, the A-type return conveyor line adopts a double-row belt conveyor line, and its discharge end is equipped with an A-type return discharge lifting and reversing machine; the A-type loading station adopts an A-type lifting and reversing unit, and is located at the discharge end of the A-type return discharge lifting and reversing machine. The B-type return conveyor line uses a double-row belt conveyor line, and its discharge end is equipped with a B-type return discharge lifting and reversing machine; the discharge end of the B-type return discharge lifting and reversing machine is directly opposite the B-type first feeding lifting and reversing machine.

[0011] Preferably, the sorting device is a lifting conveyor, which is equipped with a vision component for determining the type of machine.

[0012] Preferably, the test conveyor line includes a base, two horizontally parallel guide rails on the base, and a rack on the base between the two guide rails; the test trolley includes a movable seat slidably mounted on the two guide rails, a servo motor vertically mounted on the movable seat with its drive end extending below the movable seat, a gear on the drive end of the servo motor meshing with the rack, two slide rails horizontally mounted on the movable seat and perpendicular to the guide rails, a slide block slidably mounted on the two slide rails, a servo drive assembly driving the slide block to move along the slide rails, a gripper mounted on the slide block and driven by a lifting assembly, support plates on both sides of the gripper and respectively located above the slide rails, side guards respectively located outside the support plates, and a sensing assembly mounted on the base between the two slide rails.

[0013] Preferably, the test fixture includes a carrier plate, a conversion circuit board disposed on the carrier plate, a quick clamp disposed on the carrier plate and above the conversion circuit board for quick assembly and disassembly of the product, a quick terminal block disposed on the conversion circuit board and located on both sides of the quick clamp for powering the product, and functional test contacts disposed on the conversion circuit board and located outside the quick terminal block; one end of the carrier plate is provided with a slot for easy gripping by a gripper.

[0014] Preferably, the quick clamp includes a fixture base, mounting seats respectively disposed on both sides of the fixture base and placed parallel to each other, at least two guide rods disposed between the two mounting seats and placed perpendicular to the mounting seats, two clamps respectively sleeved on the two guide rods at both ends, a spring sleeved on the guide rods and located between the two clamps, a stop plate slidably disposed between the two mounting seats and located below the clamps, at least two elongated grooves disposed on the stop plate and placed perpendicular to the guide rods, and a guide block disposed on the fixture base and located in the elongated grooves; the stop plate is provided with at least two inclined and parallel sliding grooves; the top of the two clamps is provided with C-shaped clamps for fixing the product, and one clamp is fixed on the mounting seat, and the bottom of the other clamp is provided with a guide wheel extending into the sliding groove.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. This invention can simultaneously test two different types of products. Through intelligent control, it realizes mixed-flow testing function, achieving efficient output for small-batch product testing. 2. The test areas for Model A and Model B of this invention are neatly arranged on the same side of the test conveyor line, making the layout of the entire flow line more reasonable and aesthetically pleasing; 3. The test trolley of this invention adopts servo drive, which can achieve faster and more stable transportation, greatly saving product transportation time and improving testing efficiency. Attached Figure Description

[0016] The technical solution of the present invention will be further described below with reference to the accompanying drawings: Appendix Figure 1 This is a front structural schematic diagram of the automated streamline for PLC functional testing as described in this invention. Appendix Figure 2 This is a schematic diagram of the back structure of the present invention after part of the shell has been removed; Appendix Figure 3 This is a front view of the automated flow line for PLC functional testing as described in this invention. Appendix Figure 4 for Figure 3 Sectional view at point AA; Appendix Figure 5 for Figure 3 Sectional view at point BB; Appendix Figure 6 for Figure 3 Sectional view at CC; Appendix Figure 7 This is a schematic diagram of the front structure of the feeding area in this invention; Appendix Figure 8 This is a schematic diagram of the back structure of the feeding area in this invention; Appendix Figure 9 This is a schematic diagram of the front structure of the material feeding area in this invention; Appendix Figure 10 This is a schematic diagram of the back structure of the feeding area in this invention; Appendix Figure 11 This is a schematic diagram of the test vehicle in this invention; Appendix Figure 12 This is a schematic diagram of the test fixture in this invention; Appendix Figure 13 This is a schematic diagram of the quick clamp in this invention; Appendix Figure 14 This is a schematic diagram of the lifting and reversing mechanism in this invention.

[0017] The components include: 1. Test area; 11. Test rack; 12. Test conveyor line; 121. Base; 122. Guide rail; 13. Test area for Model A; 14. Test area for Model B; 15. Conversion area; 16. Test carriage; 161. Movable seat; 162. Servo motor; 163. Slide rail; 164. Slide block; 165. Servo drive assembly; 166. Gripper; 167. Support plate; 168. Edge retainer; 169. Sensing assembly. 17. Test Chamber; 2. Loading Area; 21. Loading Conveyor Line for Model A; 22. Loading Conveyor Line for Model B; 23. Lifting and Shifting Unit for Model A; 24. First Loading Lifting and Reversing Machine for Model B; 25. Second Loading Lifting and Reversing Machine for Model B; 26. Lifting and Reversing Unit for Model A; 3. Unloading Area; 31. Unloading Conveyor Line for Model B; 32. Unloading Conveyor Line for Model A; 33. First Unloading Lifting and Reversing Machine for Model A; 34. Second Unloading Conveyor Line for Model A 4. Material lifting and reversing machine; 41. Test fixture; 42. Carrier plate; 43. Conversion circuit board; 44. Quick clamp; 45. Fixture base; 46. Mounting base; 47. Card slot; 48. Slide rail; 49. C-shaped clamp; 40. Quick-connect terminal block; 41. Functional test contact; 42. Card slot; 5. Return conveyor line; 51. Common return conveyor line; 52. Type A return conveyor line; 53. Type B return conveyor line; 54. Sorting device; 55. Type A return feed lifting conveyor; 56. Type B return feed lifting reversing machine; 57. Return lifting and translation unit; 58. Type A return discharge lifting reversing machine; 59. Type B return discharge lifting reversing machine; 591. Z-axis linear module; 592. X-axis double-row belt conveyor line; 593. Y-axis double-row belt conveyor line; 6. PLC. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Appendix Figure 1-14 The automated flow line for PLC function testing described in this invention includes a test area 1, a loading area 2 and a unloading area 3 respectively set at both ends of the test area 1, and multiple test fixtures 4 for placing the PLC to be tested. The test area 1 includes a test frame 11, a test conveyor line 12 set on the test frame 11, an A-type test area 13 and a B-type test area 14 respectively set on one side of the test conveyor line 12, a transition area 15 set between the A-type test area 13 and the B-type test area 14, and at least two test trolleys 16 set on the test conveyor line 12 and respectively located in the A-type test area 13 and the B-type test area 14; The feeding area 2 is located on one side of the A-type test area 13, and includes a feeding frame, an A-type feeding station and a B-type feeding station respectively set on the feeding frame, an A-type feeding conveyor line 21 set on the feeding frame and flush with the test conveyor line 12, and a B-type feeding conveyor line 22 set directly below the A-type feeding conveyor line 21 and passing through the A-type test area 13. The unloading area 3 is located on one side of the B-type test area 14, and includes an unloading frame, an A-type unloading station and a B-type unloading station respectively set on the unloading frame, a B-type unloading conveyor line 31 set on the unloading frame and flush with the test conveyor line 12, and an A-type unloading conveyor line 32 set directly below the test conveyor line 12 and passing through the B-type test area 14.

[0020] During operation: The worker places the test fixture 4, equipped with the Type A PLC6, on the Type A loading station. The Type A loading conveyor 21 transports the test fixture 4 from the Type A loading station to one end of the test conveyor 12 located in the Type A test area 13. The test trolley 16 in the Type A test area 13 picks up the test fixture 4 equipped with the Type A PLC6; then the test trolley 16 reads the information from the Type A PLC6 and sends it to the appropriate function for testing. Tests are conducted in different test chambers 17 within the A-type test area 13. After the test is completed, the test trolley 16 transports the test fixture 4 equipped with the A-type PLC 6 to the conversion area 15, and then to the A-type unloading conveyor line 32 in the middle layer. The A-type unloading conveyor line 32 transports the test fixture 4 equipped with the A-type PLC 6 to the A-type unloading station. The test fixture 4 equipped with the A-type PLC 6 does not pass through the test conveyor line 12 in the B-type test area 14 to avoid interference.

[0021] Similarly, the staff places the test fixture 4 equipped with the B-type PLC6 on the B-type loading station. The lower B-type loading conveyor 22 transports the test fixture 4, equipped with the B-type PLC6, through the test chamber 17 under the A-type test area 13 to the conversion area 15. The test trolley 16 of the B-type test area 14 picks up the test fixture 4 equipped with the B-type PLC6 from the conversion area 15. The test fixture 4 equipped with the B-type PLC6 does not pass through the test conveyor 12 of the A-type test area 13 to avoid interference. Then, the test trolley 16 reads the information of the B-type PLC6 and sends it to the different test chambers 17 in the B-type test area 14 for testing according to the function to be tested. After the test is completed, the B-type unloading conveyor 31 transports the test fixture 4 equipped with the B-type PLC6 to the B-type unloading station.

[0022] The test areas 13 for model A and 14 for model B are equipped with test chambers 17 with different functions depending on the function of the test model, such as high voltage test chamber, character recognition test chamber, product performance test chamber, etc. The test chambers in test areas 13 for model A and 14 for model B have different functions.

[0023] Furthermore, such as Figure 7-8 The A-type feeding conveyor line 21 is a double-row belt conveyor line, and an A-type lifting and translation unit 23 is set at one end of the A-type feeding conveyor line 12; the A-type feeding station is set at the other end of the A-type feeding conveyor line 21. During operation: When the worker places the test fixture 4 equipped with the Type A PLC6 on the Type A loading station, the Type A loading conveyor line 21 transports the test fixture 4 equipped with the Type A PLC6 to the top of the Type A lifting and translating unit 23. Then, the Type A lifting and translating unit 23 lifts the test fixture 4 equipped with the Type A PLC6. Then, the test trolley 16 in the Type A test area 13 grabs the test fixture 4 equipped with the Type A PLC6. At the same time, the Type A lifting and translating unit 23 transports the test fixture 4 equipped with the Type A PLC6, so that the test fixture 4 equipped with the Type A PLC6 can be smoothly transported to the test trolley 16 in the Type A test area 13.

[0024] like Figure 2-8 The B-type loading station is equipped with a B-type first loading lifting and reversing machine 24; the conversion area 15 is equipped with a B-type second loading lifting and reversing machine 25; the B-type loading conveyor line 22 adopts a double-row belt conveyor line, with its two ends connected to the B-type first loading lifting and reversing machine 24 and the B-type second loading lifting and reversing machine 25 respectively.

[0025] During operation: When the worker places the test fixture 4 equipped with the B-type PLC6 on the B-type loading station, the first loading lifting and reversing machine 24 of the B-type drives the test fixture 4 to descend, placing it on the lower B-type loading conveyor line 22. The B-type loading conveyor line 22 then transports the test fixture 4 to the second loading lifting and reversing machine 25 of the B-type, and then the second loading lifting and reversing machine 26... The second loading lifting and reversing machine 25 drives the test fixture 4, which is equipped with the B-type PLC6, to rise to be level with the test conveyor line 12. Then, the test trolley 16 in the B-type test area 14 grabs the test fixture 4 equipped with the B-type PLC6. At the same time, the second loading lifting and reversing machine 25 of the B-type transports the test fixture 4 equipped with the B-type PLC6, so as to smoothly transport the test fixture 4 equipped with the B-type PLC6 onto the test trolley 16 in the B-type test area 14.

[0026] Furthermore, such as Figure 9-10 The B-type unloading conveyor line 31 adopts a lifting and reversing device; the B-type unloading station is located at the discharge end of the B-type unloading conveyor line 31. During operation: After the B-type PLC6 is tested, the test conveyor line 12 drives the test trolley 16 of the B-type test area 14 to transport the test fixture 4 with the B-type PLC6 installed to the lifting and reversing device. Then, the test trolley 16 of the B-type test area 14 pushes the test fixture 4 with the B-type PLC6 installed onto the lifting and reversing device. At the same time, it is transported to the lifting and reversing device for transport, so that the test fixture 4 with the B-type PLC6 installed is smoothly placed onto the lifting and reversing device. Finally, the test fixture 4 with the B-type PLC6 installed is transported to the B-type unloading station by the lifting and reversing device, so that the staff can take off the B-type PLC6 after testing.

[0027] like Figure 2-6 as well as Figure 9-10 The conversion area 15 is equipped with a first unloading lifting and reversing machine 33 for machine type A; a second unloading lifting and reversing machine 34 for machine type A is provided next to the unloading station of machine type A; the unloading conveyor line 32 for machine type A adopts a double-row belt conveyor line, with its two ends connected to the first unloading lifting and reversing machine 33 and the second unloading lifting and reversing machine 34 for machine type A, respectively.

[0028] During operation: After the PLC6 of Model A is tested, the test conveyor line 12 drives the test trolley 16 in the Model A test area 13 to transport the test fixture 4 equipped with the Model A PLC6 to the conversion area 15. Then, the test trolley 16 in the Model A test area 13 pushes the test fixture 4 equipped with the Model A PLC6 onto the first unloading lifting and reversing machine 33 of Model A. At the same time, the first unloading lifting and reversing machine 33 of Model A transports the test fixture 4 equipped with the Model A PLC6 smoothly onto the first unloading lifting and reversing machine 33 of Model A. Then, the first unloading lifting and reversing machine 33 of Model A drives the test fixture 4 equipped with the Model A PLC6 to... The test fixture 4 of PLC6 descends, causing the test fixture 4 containing the type A PLC6 to fall onto the middle layer type A unloading conveyor line 32. The type A unloading conveyor line 32 then transports the test fixture 4 containing the type A PLC6 to the type A second unloading lifting and reversing machine 34. The type A second unloading lifting and reversing machine 34 then drives the test fixture 4 containing the type A PLC6 to rise until it is level with the type A unloading station. Finally, the type A second unloading lifting and reversing machine 34 transports the test fixture 4 containing the type A PLC6 to the type A unloading station, making it easy for the staff to remove the type A PLC6 after testing.

[0029] Furthermore, such as Figure 4-6The A-type unloading conveyor line 32 is higher than the B-type loading conveyor line 22, so that the first unloading lifting reversing machine 33 of the A-type machine and the second loading lifting reversing machine 25 of the B-type machine are not only staggered in lifting range, but also staggered in conveying direction. The first unloading lifting reversing machine 33 of the A-type machine is for lifting between the upper and middle layers, while the second loading lifting reversing machine 25 of the B-type machine is for lifting between the upper and lower layers. This avoids interference and makes the space more compact.

[0030] Furthermore, such as Figure 2-10 The system also includes a return conveyor line 5; the return conveyor line 5 includes a common return conveyor line 51 located directly below the A-type unloading conveyor line 32, an A-type return conveyor line 52 and a B-type return conveyor line 53 located directly below the test conveyor line 12 and at the discharge end of the common return conveyor line 51, and a sorting device 54 located at the discharge end of the common return conveyor line 51 for sorting and returning according to the type of machine.

[0031] During operation: The empty test fixture 4 is placed on the common return conveyor line 51 at the A-type unloading station and the B-type unloading station. The empty test fixture 4 is then transported to the sorting device 54 via the common return conveyor line 51. At this time, the sorting device 54 sorts according to the type of machine. If it is the A-type test fixture 4, the sorting device 54 transports the empty test fixture 4 to the A-type return conveyor line 52 for return to the A-type loading station. If it is the B-type test fixture 4, the sorting device 54 transports the empty test fixture 4 to the B-type return conveyor line 53 for return to the B-type loading station.

[0032] Furthermore, such as Figure 9-10 The A-type unloading station is equipped with an A-type return feeding lifting conveyor 55; the B-type unloading station is equipped with a B-type return feeding lifting reversing machine 56; the common return conveyor line 51 adopts a double-row belt conveyor line, in which return lifting and translation units 57 corresponding to the A-type return feeding lifting conveyor 55 and the B-type return feeding lifting reversing machine 56 are respectively provided.

[0033] During operation: The empty A-type test fixture 4 at the A-type unloading station is first driven down by the A-type return feeding lifting conveyor 55 to be level with the common return conveyor line 51. At the same time, the return lifting and translating unit 57 lifts it up slightly above the common return conveyor line 51. Then, the empty A-type test fixture 4 is transported by the A-type return feeding lifting conveyor 55 to the return lifting and translating unit 57. Finally, the return lifting and translating unit 57 falls down, dropping the empty A-type test fixture 4 onto the common return conveyor line 51.

[0034] Similarly, the empty B-type test fixture 4 at the B-type unloading station is first driven down by the B-type return feeding lifting conveyor to be level with the common return conveyor line 51. At the same time, the return lifting and translating unit 57 lifts it up slightly above the common return conveyor line 51. Then, the empty B-type test fixture 4 is transported by the B-type return feeding lifting conveyor to the return lifting and translating unit 57. Finally, the return lifting and translating unit 57 falls down, dropping the empty B-type test fixture 4 onto the common return conveyor line 51.

[0035] Furthermore, such as Figure 7-8 The A-type return conveyor line 52 adopts a double-row belt conveyor line, and its discharge end is equipped with an A-type return discharge lifting and reversing machine 58; the A-type loading station adopts an A-type lifting and reversing unit 26, and is located at the discharge end of the A-type return discharge lifting and reversing machine 58. During operation: The A-type return conveyor line 52 transports the empty A-type test fixture 4 to the A-type return discharge lifting and reversing machine 58. The A-type return discharge lifting and reversing machine 58 drives the A-type test fixture 4 to rise to be level with the A-type loading conveyor line 21. At the same time, the A-type lifting and reversing unit 26 lifts it up, slightly higher than the A-type loading conveyor line 21. Then, the empty A-type test fixture 4 is transported by the A-type return discharge lifting and reversing machine 58 to the A-type lifting and reversing unit 26. Finally, the A-type lifting and reversing unit 26 falls down, dropping the empty A-type test fixture 4 onto the A-type loading conveyor line 21. At this time, the operator installs the A-type PLC 6 to be tested onto the A-type test fixture 4 and retests it.

[0036] The B-type return conveyor line 53 uses a double-row belt conveyor line, and its discharge end is equipped with a B-type return discharge lifting and reversing machine 59; the discharge end of the B-type return discharge lifting and reversing machine 59 is directly opposite the B-type first feeding lifting and reversing machine 24.

[0037] During operation: The B-type return conveyor line 53 transports the empty B-type test fixture 4 to the B-type return discharge lifting and reversing machine 59. The B-type return discharge lifting and reversing machine 59 drives the B-type test fixture 4 to rise until it is level with the B-type first loading lifting and reversing machine 24. Then, the empty B-type test fixture 4 is transported by the B-type return discharge lifting and reversing machine 59 to the B-type first loading lifting and reversing machine 24. At this time, the operator installs the B-type PLC 6 to be tested onto the B-type test fixture 4 and retests it.

[0038] Furthermore, the sorting device 54 adopts a lifting conveyor, on which a vision component for determining the type of machine is installed.

[0039] Furthermore, such as Figure 11The test conveyor line 12 includes a base 121, two horizontally arranged and parallel guide rails 122 on the base 121, and a rack on the base 121 located between the two guide rails 122; the test trolley 16 includes a movable seat 161 slidably arranged on the two guide rails 122, a servo motor 162 vertically arranged on the movable seat 161 with its drive end extending below the movable seat 161, a gear arranged on the drive end of the servo motor 162 and meshing with the rack, and two horizontally arranged guide rails 122 on the movable seat 121. The slide rail 163 is placed on the base 121 and perpendicular to the guide rail 122; the slide block 164 is slidably disposed on the two slide rails 163; the servo drive assembly 165 drives the slide block 164 to translate along the slide rail 163; the gripper 166 is disposed on the slide block 164 and driven by the lifting assembly; the support plate 167 is disposed on both sides of the gripper 166 and located above the slide rail 163 respectively; the baffle 168 is located on the outside of the support plate 167 respectively; and the sensing assembly 169 is disposed on the base 121 and located between the two slide rails 163.

[0040] During movement: The servo motor 162 drives the gear to rotate. Since the gear meshes with the rack, it drives the test carriage 16 to move on the test conveyor line 12.

[0041] When gripping the test fixture 4: the servo drive component 165 drives the gripper 166 to extend towards the test fixture 4. At this time, the gripper 166 is in a high position under the drive of the lifting component. When the gripper 166 is aligned with the slot 46 on the test fixture 4, the lifting component drives the gripper 166 to descend, so that the gripper 166 is locked into the slot 46. Then the servo drive component 165 drives the gripper 166 back to the initial position, places the test fixture 4 on the support plates 167 on both sides of the gripper 166, and limits it by the side guards 168.

[0042] The sensing component 169 uses RFID technology to identify product model information, which makes it easier for the test carriage 16 to push the test fixture 4 into the corresponding test chamber 17 for testing.

[0043] Furthermore, such as Figure 13 The test fixture 4 includes a carrier plate 41, a conversion circuit board 42 disposed on the carrier plate 41, a quick clamp 43 disposed on the carrier plate 41 and above the conversion circuit board 42 for quick assembly and disassembly of the PLC6, a quick terminal block 44 disposed on the conversion circuit board 42 and located on both sides of the quick clamp 43 for powering on the PLC6, and a functional test contact 45 disposed on the conversion circuit board 42 and located outside the quick terminal block 44; one end of the carrier plate 41 is provided with a slot 46 for easy gripping by the gripper 166.

[0044] During operation: The PLC6 to be tested is quickly mounted on the quick-release fixture 43 and connected to the input and output contacts of the PLC6 through the quick-connect terminal blocks 44 on both sides, so that the contacts of the PLC6 to be tested are electrically connected to the conversion circuit board 42; when the test fixture 4 enters the test chamber 17, the test chamber 17 contacts the functional test contacts 45 through probes, which can quickly perform various function tests; the test fixture 4, by setting the conversion circuit board 42, enables the test chamber 17 to test various models of PLC6.

[0045] Furthermore, such as Figure 13 The quick clamp 43 includes a jig base 431, mounting bases 432 respectively disposed on both sides of the jig base 431 and placed parallel to each other, at least two guide rods disposed between the two mounting bases 432 and placed perpendicular to the mounting bases 432, two clamping seats 433 respectively sleeved on the two guide rods, a spring 434 sleeved on the guide rods and located between the two clamping seats 433, and a stop plate 435 slidably disposed between the two mounting bases 432 and located below the clamping seats 433. A long groove 436 is set on the support plate 435 and placed perpendicular to the guide rod; a guide block 437 is set on the fixture seat 431 and located in the long groove 436; the support plate 435 is provided with three inclined and parallel sliding grooves 438; the top of the two card holders 433 is provided with C-shaped card pieces 439 for fixing the PLC6; the left card holder 433 is fixed on the mounting base 432, and the bottom of the right card holder 433 is provided with a guide wheel that extends into the sliding groove 438.

[0046] During operation: Pushing the stop plate 435 causes the right card holder 433 to move closer to the left card holder 433 due to the inclined and parallel sliding groove 438 on the stop plate 435 and the guide wheel extending into the sliding groove 438 at the bottom of the right card holder 433. At this time, the back of the PLC6 is placed on the C-shaped clips 439 on the top of the two card holders 433. When the stop plate 435 is released, the right card holder 433 moves away from the left card holder 433 under the elastic force of the spring 434, and the C-shaped clips 439 quickly lock the PLC6.

[0047] Furthermore, such as Figure 8 and 10 The loading station for machine type A, the loading station for machine type B, the unloading station for machine type A, and the unloading station for machine type B are all equipped with cylinders for driving the abutment plate 435, which facilitates rapid loading and unloading.

[0048] Furthermore, such as Figure 14The first feeding lifting and reversing machine 24 of type B, the second feeding lifting and reversing machine 25 of type B, the first unloading lifting and reversing machine 33 of type A, the second unloading lifting and reversing machine 34 of type A, the return feeding lifting and reversing machine 56 of type B, the return discharging lifting and reversing machine 58 of type A, and the return discharging lifting and reversing machine 59 of type B have the same structure. They all include a vertically placed Z-axis linear module 591, an X-axis double-row belt conveyor 592 horizontally set at the drive end of the Z-axis linear module 591, and a Y-axis double-row belt conveyor 593 set inside the X-axis double-row belt conveyor 592 and driven to rise and fall by the lifting component. The conveying directions of the X-axis double-row belt conveyor 592 and the Y-axis double-row belt conveyor 593 are placed perpendicular to each other, which serves as a reversing function.

[0049] Since the sorting device 54 and the Type A return feed lifting conveyor 55 do not require reversing and only need to lift for conveying, compared with the above-mentioned lifting and reversing machine, they only need to be equipped with a Z-axis linear module and an X-axis double-row belt conveyor line, eliminating the need for a Y-axis double-row belt conveyor line, and are therefore described in detail.

[0050] Compared with the lifting and reversing machine, the lifting and reversing unit 26 and lifting and reversing device of the A type only need to be equipped with an X-axis double-row belt conveyor line and a Y-axis double-row belt conveyor line that can be driven by the lifting component, eliminating the Z-axis linear module, so they are not described in detail.

[0051] The lifting and translating unit 23 and the return lifting and translating unit 57 of the A-type machine are similar to the Y-axis double-row belt conveyor line that can be driven to rise and fall by the lifting component. However, they differ in their installation structure, so they will be described in detail later.

[0052] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformations or substitutions fall within the scope of protection of the present invention.

Claims

1. An automated workflow for PLC functional testing, characterized in that: It includes a test area, a loading area and a unloading area set at both ends of the test area, and multiple test fixtures for placing the products to be tested; The test area includes a test frame, a test conveyor line set on the test frame, a test area for model A and a test area for model B respectively set on one side of the test conveyor line, a transition area set between the test area for model A and the test area for model B, and at least two test trolleys set on the test conveyor line and located in the test area for model A and the test area for model B respectively. The feeding area is located on one side of the A-type test area, including a feeding frame, an A-type feeding station and a B-type feeding station respectively set on the feeding frame, an A-type feeding conveyor line set on the feeding frame and flush with the test conveyor line, and a B-type feeding conveyor line set directly below the A-type feeding conveyor line and passing through the A-type test area. The unloading area is located on one side of the B-type test area, including an unloading frame, an A-type unloading station and a B-type unloading station respectively set on the unloading frame, a B-type unloading conveyor line set on the unloading frame and flush with the test conveyor line, and an A-type unloading conveyor line set directly below the test conveyor line and passing through the B-type test area. The conversion area is equipped with a second loading lifting and reversing machine for machine type B and a first unloading lifting and reversing machine for machine type A.

2. The automated workflow for PLC functional testing according to claim 1, characterized in that: The A-type feeding conveyor line adopts a double-row belt conveyor line, and an A-type lifting and translation unit is set at one end of the conveyor line near the test line; the A-type feeding station is set at the other end of the A-type feeding conveyor line. The B-type machine feeding station is equipped with a B-type first feeding lifting and reversing machine; the B-type machine feeding conveyor line adopts a double-row belt conveyor line, with its two ends connected to the B-type first feeding lifting and reversing machine and the B-type second feeding lifting and reversing machine, respectively.

3. The automated workflow for PLC functional testing according to claim 1, characterized in that: The B-type unloading conveyor line adopts a lifting and reversing device; the B-type unloading station is located at the discharge end of the B-type unloading conveyor line. Next to the unloading station of machine type A, a second unloading lifting and reversing machine for machine type A is installed; the unloading conveyor line for machine type A adopts a double-row belt conveyor line, with its two ends connected to the first unloading lifting and reversing machine for machine type A and the second unloading lifting and reversing machine for machine type A, respectively.

4. The automated workflow for PLC functional testing according to any one of claims 1-3, characterized in that: It also includes a return conveyor line; the return conveyor line includes a common return conveyor line set directly below the A-type unloading conveyor line, an A-type return conveyor line and a B-type return conveyor line set directly below the test conveyor line and located at the discharge end of the common return conveyor line, and a sorting device set at the discharge end of the common return conveyor line to sort and return the materials according to the type of the machine.

5. The automated workflow for PLC functional testing according to claim 4, characterized in that: The A-type unloading station is equipped with an A-type return feeding lifting conveyor; the B-type unloading station is equipped with a B-type return feeding lifting reversing machine; the common return conveyor line adopts a double-row belt conveyor line, in which return lifting and translation units corresponding to the A-type return feeding lifting conveyor and the B-type return feeding lifting reversing machine are respectively installed.

6. The automated workflow for PLC functional testing according to claim 5, characterized in that: The A-type return conveyor line adopts a double-row belt conveyor line, and its discharge end is equipped with an A-type return discharge lifting and reversing machine; the A-type loading station adopts an A-type lifting and reversing unit, and is located at the discharge end of the A-type return discharge lifting and reversing machine. The B-type return conveyor line uses a double-row belt conveyor line, and its discharge end is equipped with a B-type return discharge lifting and reversing machine; the discharge end of the B-type return discharge lifting and reversing machine is directly opposite the B-type first feeding lifting and reversing machine.

7. The automated workflow for PLC functional testing according to claim 6, characterized in that: The sorting device uses a lifting conveyor, which is equipped with a vision component for determining the type of machine.

8. The automated workflow for PLC functional testing according to claim 1, characterized in that: The test conveyor line includes a base, two horizontally parallel guide rails on the base, and a rack on the base between the two guide rails. The test trolley includes a movable seat slidably mounted on the two guide rails, a servo motor vertically mounted on the movable seat with its drive end extending below the movable seat, a gear on the drive end of the servo motor meshing with the rack, two horizontally mounted slide rails perpendicular to the guide rails, a slide block slidably mounted on the two slide rails, a servo drive assembly driving the slide block to move along the slide rails, a gripper mounted on the slide block and driven by a lifting assembly, support plates on both sides of the gripper and above the slide rails, side guards on the outer sides of the support plates, and a sensing assembly mounted on the base between the two slide rails.

9. The automated workflow for PLC functional testing according to claim 8, characterized in that: The test fixture includes a carrier plate, a conversion circuit board mounted on the carrier plate, a quick clamp mounted on the carrier plate and above the conversion circuit board for quick assembly and disassembly of the product, quick terminal blocks mounted on the conversion circuit board and located on both sides of the quick clamp for powering the product, and functional test contacts mounted on the conversion circuit board and located outside the quick terminal blocks; one end of the carrier plate is provided with a slot for easy gripping by a hand.

10. The automated workflow for PLC functional testing according to claim 9, characterized in that: The quick clamp includes a fixture base, mounting seats arranged parallel to each other on both sides of the fixture base, at least two guide rods arranged between the two mounting seats and perpendicular to the mounting seats, two clamps respectively fitted onto the two guide rods at both ends, a spring fitted onto the guide rods and located between the two clamps, a stop plate slidably arranged between the two mounting seats and located below the clamps, at least two elongated grooves arranged on the stop plate and perpendicular to the guide rods, and a guide block arranged on the fixture base and located in the elongated grooves; the stop plate is provided with at least two inclined and parallel sliding grooves; the top of the two clamps is provided with C-shaped clamps for fixing the product, and one clamp is fixed on the mounting seat, and the bottom of the other clamp is provided with a guide wheel extending into the sliding groove.

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