High and low temperature automatic testing system

Abstract

The present invention provides a high and low temperature automatic testing system, which belongs to the field of high and low temperature testing technology and includes a high and low temperature testing unit and an automatic loading and unloading unit; the high and low temperature testing unit includes an oven, a test fixture provided in the oven, and a multidimensional pick-and-place mechanism, the multidimensional pick-and-place mechanism being used to move the product to be tested on a tray placed in the oven to the test fixture for testing, and to retrieve the tested product back onto the tray; a feed door for the feed tray to enter is provided on the side of the oven; the automatic loading and unloading unit includes a loading and unloading mechanism, a material conveying mechanism, a feeding mechanism, and an automatic feed door opening mechanism; the loading and unloading mechanism feeds the tray into the material conveying mechanism, the automatic feed door opening mechanism opens the feed door, and the feeding mechanism feeds the tray into the oven through the feed door; the tested product tray returns to the loading and unloading mechanism via the feeding mechanism and the material conveying mechanism, and the product is unloaded and taken away. The high and low temperature automatic testing system provided by the present invention has a high degree of automation, high testing efficiency, and high testing accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of high and low temperature testing, and in particular relates to a high and low temperature automatic testing system. Background Art

[0002] Semiconductor electronic components often require reliability testing in both high and low temperature environments. Complete equipment equipped with these components is required to be capable of operating in a variety of extreme weather environments, ensuring that these components maintain their performance in these conditions. Therefore, various performance indicators of these components must be tested in both high and low temperature environments.

[0003] Existing high and low temperature testers are box structures with a built-in temperature control system. The box door is opened, several products to be tested are placed into the box, and then the box door is closed. The temperature control system sets the high and low temperature changes in the box, so that the products are placed in a high and low temperature environment. The above-mentioned existing high and low temperature testers have the following defects: ① The degree of automated testing is low, and the products to be tested can only be taken in and placed by manpower; ② For products to be tested that cannot be placed in the oven with the test fixture, they must be taken out of the oven after reaching the expected temperature before being tested, resulting in changes in the temperature of the products to be tested during testing; ③ For products to be tested that need to be taken out before testing, opening the box door in a low-temperature environment will cause frost inside the oven and on the surface of the products to be tested, hindering the performance testing of the products to be tested and the continuous use of the oven. Currently, there is no good solution to these problems. Therefore, the automatic testing of electronic components in high and low temperature environments has always been a bottleneck in the production and testing of electronic components. In addition, the refrigeration equipment on the market is expensive and there is a shortage of manpower, resulting in high testing costs and low testing efficiency for electronic components. Summary of the Invention

[0004] The embodiment of the present invention provides a high and low temperature automatic testing system, which aims to solve the problems of low automation, low test efficiency, inaccurate product test temperature, and inability of the test oven to work continuously for a long time in the high and low temperature testing process of existing electronic components.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a high and low temperature automatic testing system, including: a high and low temperature testing unit and an automatic loading and unloading unit;

[0006] The high and low temperature test unit includes an oven, a test fixture provided in the oven, and a multi-dimensional pick-and-place mechanism. The multi-dimensional pick-and-place mechanism is used to move the product to be tested on the tray in the oven to the test fixture for testing, and to retrieve the tested product back to the tray. A feed door for the feed tray to enter is provided on the side of the oven.

[0007] The automatic loading and unloading unit includes a loading and unloading mechanism, a material conveying mechanism, a feeding mechanism, and an automatic opening mechanism for the feeding door; the loading and unloading mechanism feeds the material tray into the material conveying mechanism, the automatic opening mechanism for the feeding door opens the feeding door, the feeding mechanism feeds the material tray conveyed by the material conveying mechanism into the oven through the feeding door, and the automatic opening mechanism for the feeding door closes the feeding door for testing;

[0008] The product tray after testing is returned to the loading and unloading mechanism through the feeding mechanism and the material transmission mechanism, and the material is unloaded and taken away.

[0009] In one possible implementation, the loading and unloading mechanism includes a loading and unloading lifting module, a horizontal loading module and a material box. The upper end of the loading and unloading lifting module is provided with a material box support plate, and the horizontal loading module pushes the material trays at the same level into the material transmission mechanism.

[0010] In one possible implementation, the material conveying mechanism includes a conveying sub-mechanism, a lifting module for lifting the material tray, a horizontal unloading module for sending the returned material tray into the material box, and a lifting plate arranged on the lifting module, the lifting module lifts the material tray on the lifting plate so that the feeding mechanism clamps the feed; wherein, the lifting module is on the side close to the feeding door, the horizontal unloading module is on the side of the lifting module close to the material box, the lifting module and the horizontal unloading module are on the conveying bottom plate of the conveying sub-mechanism, and the push rod of the lifting module passes upward through the conveying bottom plate to support the lifting plate.

[0011] In one possible implementation, the horizontal unloading module includes a unloading slide rail, a horizontal unloading cylinder that slides with the unloading slide rail, and an elastic push rod connected to the horizontal unloading cylinder. The elastic push rod extends toward one side of the material box and pushes the material tray back to the material box by moving. The loading lifting module cooperates with the lifting to stack the material tray in the material box.

[0012] In a possible implementation, the material transmission mechanism further includes a limit rod, which is mounted on a support plate of the transmission sub-mechanism, and the elastic push rod is pressed under the limit rod to avoid interfering with the material tray on the transmission line.

[0013] In a possible implementation, the elastic push rod is a spring structure, and a rubber block is provided at the end of the elastic push rod; the limiting rod is provided with a limiting pulley that is pressed and contacted by the spring.

[0014] In one possible implementation, the feeding mechanism includes a feeding base plate, a horizontal feeding module assembled under the feeding base plate, a feeding lifting module connected to the horizontal feeding module, and a clamping cylinder connected to the feeding lifting module; the clamping claws of the clamping cylinder clamp the material tray on the material conveying mechanism and feed it into the oven.

[0015] In one possible implementation, the automatic opening mechanism of the feed door includes a linear push rod, the base of which is hinged to the loading and unloading bracket of the automatic loading and unloading unit, the telescopic rod of the linear push rod is hinged to the upper end of the feed door, and the lower end of the feed door is rotatably connected to the outside of the oven through a door shaft.

[0016] In one possible implementation, the multi-dimensional pick-and-place mechanism includes an X-axis drive sub-mechanism, a Y-axis drive sub-mechanism, and a Z-axis drive sub-mechanism, and a drive rod of the Z-axis drive sub-mechanism is provided with a suction nozzle for sucking the product to be tested;

[0017] The high and low temperature testing unit also includes a movable platform, which includes a fixed base plate, a vertical plate parallel to the fixed base plate, an X-direction movable plate that moves along the X-axis, and a Y-direction movable plate that moves along the Y-axis. The test fixture is located on the X-direction movable plate and the Y-direction movable plate vertical plate. The moving direction of the X-direction movable plate is parallel to the conveying direction of the material conveying mechanism, and the Y-direction movable plate is located on the X-direction movable plate.

[0018] In one possible implementation, the mobile platform further includes an X-direction tension spring and a Y-direction tension spring, wherein the X-direction tension spring is connected between the vertical plate or the fixed base plate and the X-direction movable plate, and the Y-direction tension spring is connected between the X-direction movable plate and the Y-direction movable plate.

[0019] Compared with the prior art, the high and low temperature automatic testing system provided by the present invention has the following beneficial effects: the loading and unloading of the product to be tested is completed by the loading and unloading mechanism of the automatic loading and unloading unit, and the product to be tested is sent from the normal temperature zone to the high and low temperature testing unit through the material transmission mechanism, the feeding mechanism and the automatic opening mechanism of the feeding door, and then the continuous automatic testing of the product to be tested in the test area oven is realized through the multi-dimensional picking and placing mechanism, which fundamentally solves the problem that the product to be tested cannot be continuously tested in a high and low temperature testing environment, ensures the accuracy of high and low temperature testing, and improves testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the high and low temperature automatic testing system provided by the embodiment of the present invention Figure 1 ;

[0021] Figure 2Schematic diagram of the structure of the high and low temperature automatic testing system provided by the embodiment of the present invention Figure 2 ;

[0022] Figure 3 Schematic diagram of the structure of the automatic loading and unloading unit provided in the embodiment of the present invention Figure 1 ;

[0023] Figure 4 Schematic diagram of the structure of the automatic loading and unloading unit provided in the embodiment of the present invention Figure 2 ;

[0024] Figure 5 Schematic diagram of the structure of the automatic loading and unloading unit provided in the embodiment of the present invention Figure 3 ;

[0025] Figure 6 Schematic diagram of the structure of the automatic loading and unloading unit provided in the embodiment of the present invention Figure 4 ;

[0026] Figure 7 A schematic structural diagram of a loading and lifting module of an automatic loading and unloading unit provided in an embodiment of the present invention;

[0027] Figure 8 Schematic diagram of the structure of the material transmission mechanism of the automatic loading and unloading unit provided in the embodiment of the present invention Figure 1 ;

[0028] Figure 9 Schematic diagram of the structure of the material transmission mechanism of the automatic loading and unloading unit provided in the embodiment of the present invention Figure 2 ;

[0029] Figure 10 Schematic diagram of the structure of the feeding mechanism of the automatic loading and unloading unit provided in the embodiment of the present invention Figure 1 ;

[0030] Figure 11 Schematic diagram of the structure of the feeding mechanism of the automatic loading and unloading unit provided in the embodiment of the present invention Figure 2 ;

[0031] Figure 12 A schematic diagram of the appearance and structure of a high and low temperature test unit provided in an embodiment of the present invention;

[0032] Figure 13 Schematic diagram of the internal structure of the high and low temperature test unit provided in the embodiment of the present invention Figure 1 ;

[0033] Figure 14 Schematic diagram of the internal structure of the high and low temperature test unit provided in the embodiment of the present invention Figure 2 ;

[0034] Figure 15Schematic diagram of the internal structure of the high and low temperature test unit provided in the embodiment of the present invention Figure 3 ;

[0035] Figure 16 Schematic diagram of the internal structure of the high and low temperature test unit provided in the embodiment of the present invention Figure 4 ;

[0036] Description of reference numerals:

[0037] 1. Nitrogen exchange chamber; 101. Reclaim door;

[0038] 2. Oven; 201, oven door; 202; feeding door;

[0039] 3. Feeding mechanism; 301. Clamping cylinder; 302. Feeding lifting module; 303. Horizontal feeding module; 304. Feeding bottom plate; 305. Guide rod;

[0040] 4. Horizontal loading module; 5. Loading lifting module;

[0041] 6. Material conveying mechanism; 601. Conveying bottom plate; 602. Horizontal unloading cylinder; 603. Elastic push rod; 604. Pulley assembly; 605. Limit block; 606. Lifting plate; 607. Limit pulley; 608. Limit rod; 609. Rubber block; 610. Unloading slide rail;

[0042] 7. Automatic opening mechanism of feeding door;

[0043] 8. Z-axis drive sub-mechanism; 801. Suction nozzle; 802. Support plate;

[0044] 9. Mobile platform; 901. X-axis mobile plate; 902. Y-axis tension spring; 903. X-axis tension spring; 904. Fixed bottom plate; 905. Y-axis mobile plate;

[0045] 10. Control box; 11. Refrigeration unit; 12. Support legs; 13. Universal wheels; 14. Loading and unloading brackets; 15. Control system; 16. Ejection module; 17. Material tray; 18. Material box; 19. Material box pallet; 20. High and low temperature test bracket; 21. Y-axis drive sub-mechanism; 22. X-axis drive sub-mechanism; 23. Test fixture. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] Please also refer to Figures 1 to 16The automatic high and low temperature testing system provided by the present invention is now described. The automatic high and low temperature testing system comprises a high and low temperature testing unit and an automatic loading and unloading unit. The high and low temperature testing unit comprises an oven 2, a test fixture 23 disposed within the oven 2, and a multi-dimensional pick-and-place mechanism. The multi-dimensional pick-and-place mechanism is used to move the product to be tested from a tray 17 within the oven 2 to the test fixture for testing and to retrieve the tested product back onto the tray 17. A feed door 202 is provided on the side of the oven 2 for the feed tray 17 to enter.

[0048] See also Figures 1 to 11 The automatic loading and unloading unit includes a loading and unloading mechanism, a material transmission mechanism 6, a feeding mechanism 3 and an automatic feeding door opening mechanism 7; the loading and unloading mechanism sends the material tray 17 into the material transmission mechanism 6, the automatic feeding door opening mechanism 7 opens the feeding door 202, the feeding mechanism 3 sends the material tray 17 transmitted by the material transmission mechanism 6 into the drying oven 2 through the feeding door 202, and the automatic feeding door opening mechanism 7 closes the feeding door 202 for testing.

[0049] The product tray 17 after testing is returned to the loading and unloading mechanism through the feeding mechanism 3 and the material transmission mechanism 6, and the material is unloaded and taken away.

[0050] Compared with the prior art, the high and low temperature automatic testing system provided in this embodiment completes the loading and unloading of the product to be tested through the loading and unloading mechanism of the automatic loading and unloading unit, and through the material transmission mechanism 6, the feeding mechanism 3 and the automatic opening mechanism of the feeding door 7, the product to be tested is sent from the normal temperature area to the high and low temperature testing unit, and then the multi-dimensional picking and placing mechanism is used to realize continuous automatic testing of the product to be tested in the test area oven 2, which fundamentally solves the problem that the product to be tested cannot be continuously tested in a high and low temperature test environment, ensures the accuracy of high and low temperature testing, and improves testing efficiency.

[0051] The high and low temperature automatic testing system provided by the present invention can not only realize the automatic loading of the product to be tested, but also realize the automatic unloading of the product after testing. That is, the tested product tray 17 returns to the material box 18 of the loading and unloading mechanism along the same route. The testing process does not require human intervention and has a high degree of automation. The test fixture is placed in the high and low temperature testing oven 2. The multi-dimensional pick-and-place mechanism is used to pick up and place the product to be tested on the test fixture, and then the tested product is picked up and placed back on the tray 17. The test product does not need to be taken out of the oven 2. This greatly improves the test accuracy of the electronic components being tested, reduces testing costs, and improves testing efficiency.

[0052] Optionally, the entire system also includes a nitrogen exchange chamber 1, and all automatic loading and unloading units are located in the nitrogen exchange chamber 1. Nitrogen is an inert gas and will not contaminate the product. The nitrogen atmosphere in the chamber can avoid the problem of water vapor in the gas in the chamber. After the loading and unloading of the product to be tested is completed, the nitrogen exchange chamber 1 is used to reduce the water vapor content at the connection between the high and low temperature oven 2 and the outside world to achieve the effect of preventing frost, thereby realizing the transportation of the product to be tested between the normal temperature zone and the high and low temperature test zone, and realizing continuous automatic testing of the product to be tested in the high and low temperature zones, which fundamentally solves the problem that the product to be tested cannot be continuously tested in a high and low temperature test environment, and effectively prevents the frosting phenomenon in the low temperature zone after contacting the normal temperature gas.

[0053] The nitrogen in the nitrogen exchange chamber 1 can be replaced by existing nitrogen exchange technology. A material taking door 101 is provided at the position of the nitrogen exchange chamber 1 facing the material box 18 to facilitate the placement of the material tray 17 of the product to be tested and the removal of the material tray 17 of the tested product.

[0054] In the high and low temperature testing system provided by the present invention, various mechanisms of the automatic loading and unloading unit are installed on the loading and unloading bracket 14 , and various parts of the high and low temperature testing unit are installed on the high and low temperature testing bracket 20 .

[0055] See also Figure 1 and Figure 2 In order to facilitate support and movement, support legs 12 and universal wheels 13 are provided at the bottom of the nitrogen exchange chamber 1 and the bottom of the high and low temperature test unit box. At the same time, a door 201 is provided on the oven 2 and an observation window is provided on the door 201. The temperature in the oven 2 is adjusted according to the preset requirements. The oven 2 uses existing equipment. For example, the oven 2 of this embodiment includes a refrigeration unit 11, a control box 10 and an insulation liner. The insulation liner is used to place the mobile platform 9. The refrigeration unit 11 provides hot air and cold air for the oven 2, and creates the high and low temperature environment required for the test with the insulation liner. The control box 10 performs program control on the test area oven 2.

[0056] As a specific implementation of the high and low temperature automatic testing system provided by the embodiment of the present invention, see Figures 3 to 7 The loading and unloading mechanism includes a loading and unloading lifting module 5, a horizontal loading module 4 and a material box 18. The upper end of the loading and unloading lifting module 5 is provided with a material box support plate 19. The horizontal loading module 4 pushes the material tray 17 at the same level into the material transmission mechanism 6.

[0057] In this embodiment, see Figure 6As shown, the material box 18 includes at least two opposite baffles and a material box bottom plate, and a plurality of material trays 17 are stacked between the two baffles to limit the material trays 17 and prevent the material trays 17 from tilting and sliding. A plurality of guide grooves for supporting and limiting the material trays 17 are correspondingly provided on the two baffles. The distance between the material trays 17 is controlled by the support and guidance of the guide grooves, and it is convenient to push out any layer of material trays 17 or push in the tested material trays 17; the material box support plate 19 moves up and down with the loading and lifting module 5. When the horizontal loading module 4 pushes any layer of material tray 17 into the transmission mechanism according to the preset order, the loading and lifting module 5 lifts the position of a material tray 17 on the material box 18 support plate, so that the horizontal loading module 4 continues to push the next material tray 17 with the product to be tested. Similarly, when the tested product tray 17 returns to the material box 18, the loading and unloading module 5 is lifted and lowered to enable the horizontal unloading module to push the tested product tray 17 into the material box 18 horizontally, thereby completing the automatic resetting of the test tray 17.

[0058] The loading and lifting module 5 and the horizontal loading module 4 can be any one of linear actuators such as an electric slide, an electric push rod, a hydraulic cylinder, an air cylinder, a screw lift, a ball transmission, a chain transmission, etc. The loading and lifting module 5 and the horizontal loading module 4 are both mounted on the loading and unloading bracket 14.

[0059] The tray 17 is provided with a plurality of support positions for placing the test products. In this embodiment, the support positions are grooves adapted to fit the test products. The grooves are distributed in a rectangular array or a circular array.

[0060] In some embodiments, see Figure 8 and Figure 9 The material conveying mechanism 6 includes a conveying sub-mechanism, a lifting module 16 for lifting the material tray 17, a horizontal unloading module for sending the returned material tray 17 into the material box 18, and a lifting plate 606 arranged on the lifting module 16. The lifting module 16 lifts the material tray 17 on the lifting plate 606 so that the feeding mechanism 3 clamps the feed; wherein, the lifting module 16 is on the side close to the feed door 202, the horizontal unloading module is on the side of the lifting module 16 close to the material box 18, the lifting module 16 and the horizontal unloading module are on the transmission bottom plate 601 of the conveying sub-mechanism, and the push rod of the lifting module 16 passes upward through the transmission bottom plate 601 to support the lifting plate 606.

[0061] The material transfer mechanism 6 transfers the material tray 17 of the product to be tested to the clamping position of the feeding mechanism 3, and transfers the material tray 17 placed at this position to the vicinity of the material box 18, so that the horizontal unloading module can push the material tray 17 into the material box 18.

[0062] Alternatively, see Figure 8 and Figure 9The transmission sub-mechanism adopts chain drive or belt drive. For example, the transmission sub-mechanism includes a transmission base plate 601, a support plate arranged on the transmission base plate 601, a pulley group 604 located on the inner side of the support plate, a driving motor located on the outer side of the support plate, and a limit block 605 located on the support plate. It is pushed to the pulley group 604 by the horizontal loading module 4, and after being conveyed forward to the feeding position, it is stopped by the limit block 605. At this time, the material tray 17 is directly above the top material module 16 and the lifting plate 606. Through the lifting of the top material module 16, the material tray 17 leaves the pulley group 604 to facilitate the clamping of the clamping claws of the feeding mechanism 3.

[0063] In this embodiment, see Figure 8 and Figure 9 The pulley group 604 includes a driving wheel and four driven wheels. The driving wheel is driven by the driving motor to rotate, and the belt is driven to move through the pulley group 604. The forward and reverse rotation of the driving motor can realize the reciprocating motion of the belt; the product tray 17 to be tested is driven by the belt to move forward, and after hitting the limit block 605, it stops moving forward. At this time, the lifting module 16 fixed on the transmission bottom plate 601 drives the lifting plate 606 to lift and lower. The lifting plate 606 lifts the product tray 17 to be tested to a specified height, and then it is taken away by the feeding mechanism 3.

[0064] When the material tray 17 returns, the pulley group 604 transports the material tray 17 toward the material box 18. During this process, the belt cannot send all the material trays 17 back into the material box 18. When the material tray 17 passes the elastic push rod 603 of the horizontal unloading module, the horizontal unloading cylinder 602 breaks away from the restriction of the limit pulley 607 and bounces up, driving the elastic push rod 603 to push forward and push the material tray 17 to move into the material box 18 until the material tray 17 is stacked in the material box 18. After the test, the material tray 17 is fully returned to the material box 18 under the push of the elastic push rod 603.

[0065] Optionally, the ejector module 16 and the horizontal unloading module can be any linear actuator such as an electric slide, a linear slide, an electric push rod, a hydraulic cylinder, an air cylinder, a screw lift, or a ball screw. The ejector module 16 is mounted below the conveyor base 601, and the horizontal unloading module is mounted above the conveyor base 601.

[0066] In this embodiment, see Figure 8 and Figure 9The horizontal unloading module includes an unloading slide 610, a horizontal unloading cylinder 602 that slides with the unloading slide 610, and an elastic push rod 603 connected to the horizontal unloading cylinder 602. The elastic push rod 603 extends toward one side of the material box 18, and pushes the material tray 17 back to the material box 18 by moving. The loading and lifting module 5 cooperates with the lifting to stack the material tray 17 in the material box 18. By utilizing the elasticity of the elastic push rod 603, interference with the material tray 17 can be avoided when the material tray 17 moves toward the drying oven 2; when the material tray 17 moves toward the material box 18, interference with the material tray 17 is first avoided. When the material tray 17 moves over the elastic push rod 603, the horizontal unloading cylinder 602 moves along the unloading slide 610 toward the material box 18, driving the elastic push rod 603 to push the material tray 17 toward the material box 18. As shown Figure 6 The figure shows a schematic diagram of two states of the horizontal unloading cylinder 602, namely, a schematic diagram of the elastic push rod 603 being pressed under the limiting rod 608 and a schematic diagram of the horizontal unloading cylinder 602 moving forward to push the material tray 17 into the material box 18.

[0067] In some possible embodiments, see Figure 8 and Figure 9 The material conveying mechanism 6 also includes a limit rod 608, which is mounted on the support plate of the conveying sub-mechanism. The elastic push rod 603 is pressed under the limit rod 608 to avoid interfering with the material tray 17 on the conveying line. The elastic push rod 603 moves with the horizontal discharge cylinder 602 toward the drying oven 2 until it is pressed under the limit rod 608. When the horizontal discharge cylinder 602 moves toward the material bin 18 to retrieve the material tray 17, the elastic push rod 603 moves until it is free from the pressure of the limit rod 608, pushing the material tray 17 into the material bin 18. Optionally, the elastic push rod 603 is connected to the horizontal discharge cylinder 602 via an axis hinge, where the horizontal discharge cylinder 602 can also be a slider that reciprocates along the discharge rail 610.

[0068] Alternatively, see Figure 8 and Figure 9 The elastic push rod 603 is a spring-loaded structure with a rubber block 609 at its end. A limiting pulley 607 is mounted on the limiting rod 608, which is pressed against the spring. The rubber block 609 pushes the material tray 17, preventing damage. Furthermore, when the elastic push rod 603 moves toward the oven 2, the rubber block 609 contacts the limiting rod 608, forming a stop and limiting the horizontal unloading cylinder. The rolling friction between the limiting pulley 607 and the elastic push rod 603 reduces resistance to its movement.

[0069] As a possible implementation, see Figure 10 and Figure 11The feeding mechanism 3 includes a feeding base plate 304, a horizontal feeding module 303 mounted below the feeding base plate 304, a feeding lifting module 302 connected to the horizontal feeding module 303, and a clamping cylinder 301 connected to the feeding lifting module 302. The clamping claws of the clamping cylinder 301 clamp the material tray 17 on the material conveying mechanism 6 and feed it into the oven 2. The horizontal feeding module 303 is any linear guide such as a linear slide, a ball screw, or a gear rack, while the feeding lifting module 302 is any linear actuator such as a lifting cylinder or an electric push rod. The horizontal feeding module 303 reciprocates horizontally and linearly, while the feeding lifting module 302 is raised and lowered to grasp and release the material tray 17. The clamping claws facilitate the placement of the material tray 17 onto the movable platform 9 within the oven 2 through the feeding door 202, and also facilitate the insertion into the oven 2 to remove the tested material tray 17 from the movable platform 9.

[0070] As a possible implementation, see Figures 2 to 6 The automatic feed door opening mechanism 7 includes a linear push rod. The base of the linear push rod is hinged to the loading and unloading bracket 14 of the automatic loading and unloading unit. The telescopic rod of the linear push rod is hinged to the upper end of the feed door 202. The lower end of the feed door 202 is rotatably connected to the outside of the oven 2 via a door shaft. The automatic feed door opening mechanism 7 is provided to connect the automatic loading and unloading unit with the high and low temperature test unit. Optionally, the base of the linear push rod is hinged to the bottom plate of the nitrogen displacement chamber 1. The linear push rod is extended and retracted to achieve the downward and upward rotation of the feed door 202, thereby opening or closing the feed door 202. The linear push rod can be any of an electric push rod, a pneumatic cylinder, and a hydraulic cylinder.

[0071] As a possible implementation, see Figures 12 to 16 The multi-dimensional pick-and-place mechanism includes an X-axis drive sub-mechanism 22, a Y-axis drive sub-mechanism 21, and a Z-axis drive sub-mechanism 8. The drive rod of the Z-axis drive sub-mechanism 8 is provided with a suction nozzle 801 for sucking the product to be tested. The multi-dimensional pick-and-place mechanism provided in this embodiment is a three-degree-of-freedom movement. The X-axis drive sub-mechanism 22 adopts a gear rack movement mode, and the Y-axis drive sub-mechanism 21 is an electric push rod or a cylinder; the Z-axis drive sub-mechanism 8 includes a linear actuator of an electric push rod or a cylinder, and a rotating rod driven by a rotary motor. The suction nozzle 801 is installed on the support plate 802 at the end of the rotating rod. The picking and placing of the suction nozzle 801 is achieved through lifting and rotating movements. The suction nozzle 801 sucks electronic components to prevent damage to the electronic components. Through three-dimensional movement and a rotational movement, the product to be tested is placed on the test fixture, and the tested product is then taken back to the original position of the material tray 17.

[0072] As a specific implementation of the high and low temperature automatic testing system provided by the embodiment of the present invention, see Figures 13 to 16The high and low temperature test unit also includes a mobile platform 9, which includes a fixed base plate 904, a vertical plate parallel to the fixed base plate 904, an X-direction moving plate 901 that moves along the X-axis, and a Y-direction moving plate 905 that moves along the Y-axis. The test fixture 23 is located on the X-direction moving plate 901 and the Y-direction moving plate 905 vertical plates. The moving direction of the X-direction moving plate 901 is parallel to the conveying direction of the material conveying mechanism 6, and the Y-direction moving plate 905 is located on the X-direction moving plate 901.

[0073] As a possible implementation, see Figure 16 The movable platform 9 further includes an X-direction tensioning spring 903 and a Y-direction tensioning spring 902. The X-direction tensioning spring 903 is connected between the vertical plate or fixed base plate 904 and the X-direction movable plate 901, while the Y-direction tensioning spring 902 is connected between the X-direction movable plate 901 and the Y-direction movable plate 905. The X-direction tensioning spring 903 and the Y-direction tensioning spring 902 can keep the X-direction movable plate 901 and the Y-direction movable plate 905 in close contact with one side of the driving element. This arrangement helps eliminate the backstroke error of the driving element, thereby improving the movement accuracy of the X-direction movable plate 901 and the Y-direction movable plate 905.

[0074] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0075] The embodiment of the present invention further provides a high and low temperature automatic testing method, the method comprising the following steps:

[0076] Monitor the position information of the material tray 17;

[0077] If it is detected that a material tray 17 is in the first preset position, the horizontal loading module 4 pushes the material tray 17 to move horizontally onto the material conveying mechanism 6;

[0078] If it is detected that the position of the tray 17 closest to the first preset position is misaligned, the height information of the tray 17 relative to the first preset position is determined;

[0079] According to the height information of the material tray 17, the loading and unloading module 5 is controlled to rise and fall, the material tray 17 is adjusted to the first preset position, and then the material tray 17 is pushed horizontally to the second preset position on the material conveying mechanism 6;

[0080] The material transmission mechanism 6 obtains the signal of the material tray 17 and transmits it backwards;

[0081] When the material tray 17 touches the limit stop 605 or reaches the third preset position, the material conveying mechanism 6 stops conveying;

[0082] The lifting module 16 lifts the material tray 17 to a preset height according to the signal of the third preset position material tray 17;

[0083] The control system 15 obtains the height information of the material tray 17, controls the clamping cylinder 301 of the feeding mechanism 3 to move downward and backward to the third preset position, clamps the material tray 17, and moves backward until the material tray 17 reaches the fourth preset position;

[0084] The linear push rod of the automatic opening mechanism 7 of the feed door retracts, rotating the feed door 202 downward to open it, and the clamping cylinder 301 of the feed mechanism 3 continues to move backward until the material tray 17 is placed on the mobile platform 9;

[0085] The clamping cylinder 301 is recovered and the feed door 202 is closed;

[0086] Monitor the position signal of the loading tray 17 of the mobile platform 9;

[0087] Control the X-axis driving sub-mechanism 22 and the Y-axis driving sub-mechanism 21 until the tray 17 is at the fifth preset position, and then the Z-axis driving sub-mechanism 8 moves downward and rotates to the suction nozzle 801 to suck the first product to be tested according to the preset sequence;

[0088] The Z-axis driving sub-mechanism 8 moves upward and continues to rotate until it reaches the test fixture 23, and then moves downward to place the first product to be tested on the test fixture for testing;

[0089] The Z-axis drive sub-mechanism moves upward and rotates away from the test fixture 23 to start the test; at the same time, the temperature of the oven 2 is adjusted according to the preset temperature;

[0090] Obtain the information of the test tray 17. After the test is completed, control the Z-axis drive sub-mechanism 8 to suck the tested product to the original position, and suck the second product for testing according to the preset order; cycle in sequence until all products on the tray 17 are tested;

[0091] The product information of the tray 17 is obtained, and the X-axis drive sub-mechanism 22 and the Y-axis drive sub-mechanism 21 are controlled to move; at this time, the feed door 202 is opened, and the clamping cylinder 301 extends to remove the tray 17 and return it to the third preset position of the material transfer mechanism 6;

[0092] Obtain information from the material tray 17 and control the material conveying mechanism 6 to convey the material forward;

[0093] When the tray 17 returns to the second preset position, the horizontal unloading module is controlled to push the tray 17 forward into the material box 18 and return to the original position; the horizontal loading module 4 continues to push out the tray 17 which is now in the first preset position, and the test of the product on the next tray 17 is carried out in a cycle.

[0094] A control system is set up in the nitrogen replacement chamber, and the entire testing process is completed automatically, saving time and effort, avoiding interference with the testing process, and improving test accuracy.

[0095] The control system of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high and low temperature automatic testing system, characterized in that: include: High and low temperature testing unit and automatic loading and unloading unit; The high and low temperature test unit comprises an oven (2), a test fixture (23) provided in the oven (2), and a multi-dimensional pick-and-place mechanism, wherein the multi-dimensional pick-and-place mechanism is used to move the product to be tested on the material tray (17) in the oven (2) to the test fixture (23) for testing, and to retrieve the tested product back to the material tray (17); a feed door (202) for the feed tray (17) to enter is provided on the side of the oven (2); The automatic loading and unloading unit comprises a loading and unloading mechanism, a material transmission mechanism (6), a feeding mechanism (3) and an automatic feeding door opening mechanism (7); the loading and unloading mechanism sends a material tray (17) into the material transmission mechanism (6), the automatic feeding door opening mechanism (7) opens the feeding door (202), the feeding mechanism (3) sends the material tray (17) transmitted by the material transmission mechanism (6) into the drying oven (2) through the feeding door (202), and the automatic feeding door opening mechanism (7) closes the feeding door (202) for testing; After the test, the product tray (17) is returned to the loading and unloading mechanism via the feeding mechanism (3) and the material transmission mechanism (6) to be unloaded and taken away; The loading and unloading mechanism comprises a loading and unloading lifting module (5), a horizontal loading module (4) and a material box (18); a material box support plate (19) is provided at the upper end of the loading and unloading lifting module (5); and the horizontal loading module (4) pushes the material tray (17) at the same level into the material transmission mechanism (6); The material conveying mechanism (6) includes a conveying sub-mechanism, a material lifting module (16) for lifting the material tray (17), a horizontal material discharge module for feeding the returned material tray (17) into the material box (18), and a lifting plate (606) arranged on the material lifting module (16), wherein the material lifting module (16) lifts the material tray (17) on the lifting plate (606) so that the feeding mechanism (3) clamps the feeding material; wherein the material lifting module (16) is located on a side close to the feeding door (202), the horizontal material discharge module is located on a side of the material lifting module (16) close to the material box (18), the material lifting module (16) and the horizontal material discharge module are located on a conveying bottom plate (601) of the conveying sub-mechanism, and a push rod of the material lifting module (16) passes through the conveying bottom plate (601) upward to support the lifting plate (606); The horizontal unloading module comprises an unloading slide rail (610), a horizontal unloading cylinder (602) that slides with the unloading slide rail (610), and an elastic push rod (603) connected to the horizontal unloading cylinder (602); the elastic push rod (603) is extended and retracted toward one side of the material box (18), and pushes the material tray (17) back to the material box (18) by moving; the loading lifting module (5) cooperates with the lifting to make the material tray (17) stacked in the material box (18); The material transmission mechanism (6) further comprises a limiting rod (608), the limiting rod (608) being mounted on a support plate of the transmission sub-mechanism, and the elastic push rod (603) being pressed under the limiting rod (608) to avoid interfering with the material tray (17) on the transmission line; When the material tray (17) passes over the elastic push rod (603) of the horizontal unloading module, the horizontal unloading cylinder (602) breaks away from the restriction of the limit rod (608) and bounces up, driving the elastic push rod (603) to push forward and push the material tray (17) into the material box (18) until the material tray (17) is stacked in the material box (18); during testing, the elastic push rod (603) moves with the horizontal unloading cylinder (602) toward the oven (2) until the elastic push rod (603) is pressed under the limit rod (608), thereby avoiding interference with the material tray (17).

2. The high and low temperature automatic testing system according to claim 1, characterized in that: The elastic push rod (603) is a spring sheet structure, and a rubber block (609) is provided at its end; the limiting rod (608) is provided with a limiting pulley (607) that is in pressing contact with the spring sheet.

3. The high and low temperature automatic testing system according to claim 1, characterized in that: The feeding mechanism (3) includes a feeding base plate (304), a horizontal feeding module (303) assembled below the feeding base plate (304), a feeding lifting module (302) connected to the horizontal feeding module (303), and a clamping cylinder (301) connected to the feeding lifting module (302); the clamping claws of the clamping cylinder (301) clamp the material tray (17) on the material conveying mechanism (6) and feed it into the oven (2).

4. The high and low temperature automatic testing system according to claim 1, characterized in that: The automatic opening mechanism (7) of the feed door includes a linear push rod, the base of which is hinged to the loading and unloading bracket (14) of the automatic loading and unloading unit, the telescopic rod of which is hinged to the upper end of the feed door (202), and the lower end of the feed door (202) is rotatably connected to the outer side of the oven (2) via a door shaft.

5. The high and low temperature automatic testing system according to claim 1, characterized in that: The multi-dimensional pick-and-place mechanism comprises an X-axis drive sub-mechanism (22), a Y-axis drive sub-mechanism (21), and a Z-axis drive sub-mechanism (8), wherein a drive rod of the Z-axis drive sub-mechanism (8) is provided with a suction nozzle (801) for sucking the product to be tested; The high and low temperature test unit further comprises a movable platform (9), wherein the movable platform (9) comprises a fixed bottom plate (904), a vertical plate parallel to the fixed bottom plate (904), an X-direction movable plate (901) movable along the X-axis, and a Y-direction movable plate (905) movable along the Y-axis. The X-direction movable plate (901) and the Y-direction movable plate (905) vertical plates are provided. The test fixture (23) is located on the fixed bottom plate (904). The moving direction of the X-direction movable plate (901) is parallel to the conveying direction of the material conveying mechanism (6). The Y-direction movable plate (905) is located on the X-direction movable plate (901).

6. The high and low temperature automatic testing system according to claim 5, characterized in that: The mobile platform (9) further comprises an X-direction tensioning spring (903) and a Y-direction tensioning spring (902), wherein the X-direction tensioning spring (903) is connected between the vertical plate or the fixed bottom plate (904) and the X-direction movable plate (901), and the Y-direction tensioning spring (902) is connected between the X-direction movable plate (901) and the Y-direction movable plate (905).

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