Printed Circuit Board Deformation Test Equipment

Abstract

The present invention proposes a printed circuit board deformation test device, comprising: a contact pressure device, including a driving component and a push rod, the driving component is used to provide a driving force for the push rod, so that the first end of the push rod performs a linear reciprocating motion between a first position and a second position along a direction perpendicular to the printed circuit board; when the first end is in the first position, the first end is pressed against any solder joint on the printed circuit board; when the first end is in the second position, the first end is separated from the printed circuit board. The device proposed in the present application is used to perform an extrusion deformation test on solder joints on a printed circuit board to replace manual extrusion deformation testing, thereby ensuring the precision and accuracy of the test and improving the reliability of the test results.

Description

Technical Field

[0001] The invention relates to the field of printed circuit boards, and in particular to a printed circuit board deformation testing device. Background Art

[0002] Printed Circuit Board (PCB) is the provider of electronic component connections. Electronic components are usually fixed on PCB by welding. After the solder joints of electronic components on PCB are formed by welding, in order to verify the reliability of the welding, some samples need to be taken for reliability testing of the solder joints, among which the stress deformation resistance of the solder joints is a key evaluation content. The current evaluation method for the stress deformation resistance of solder joints is: deform the sample by artificial extrusion, that is, artificial extrusion to deform the sample by about 2mm, and then release it. After repeating the above actions for a certain number of times, record and observe the cracking of the solder joints. Since the strength and stroke of artificial extrusion are difficult to control, the accuracy of the test results is not high, the effect is not good, and accurate conclusions are often not obtained.

[0003] Therefore, improving the reliability of test results of the anti-deformation ability of solder joints on printed circuit boards is an urgent problem to be solved in the art. Summary of the invention

[0004] The invention provides a printed circuit board deformation testing device, thereby improving the reliability of the test result of the anti-deformation ability of the printed circuit board solder joint.

[0005] In order to solve the above problems, as one aspect of the present invention, a printed circuit board deformation testing device is provided, comprising:

[0006] The touch-pressing device comprises a driving component and a push rod, wherein the driving component is used to provide a driving force for the push rod so that a first end portion of the push rod performs a linear reciprocating motion between a first position and a second position along a direction perpendicular to the printed circuit board;

[0007] When the first end is in the first position, the first end is pressed against any solder joint on the printed circuit board;

[0008] When the first end is at the second position, the first end is separated from the printed circuit board.

[0009] Optionally, it also includes: a supporting device, on which the printed circuit board can be detachably mounted.

[0010] Optionally, the supporting device comprises a first supporting block and a second supporting block which are spaced apart from each other;

[0011] When the printed circuit board is mounted on the supporting device, one end of the printed circuit board is detachably mounted on the first supporting block, and / or the other end of the printed circuit board is detachably mounted on the second supporting block.

[0012] Optionally, the upper end of the first support block is a first step structure, and the upper end of the second support block is a second step structure;

[0013] The first step structure includes a first step bottom surface, a first step side surface and a first step top surface; the second step structure includes a second step bottom surface, a second step side surface and a second step top surface, and the first step side surface and the second step side surface are arranged opposite to each other;

[0014] When the printed circuit board is mounted on the supporting device, two ends of the printed circuit board are respectively located on the bottom surface of the first step and the bottom surface of the second step, and the printed circuit board is clamped between the first supporting block and the second supporting block by the side surface of the first step and the side surface of the second step.

[0015] Optionally, a plurality of fixing blocks are arranged on the top surface of the first step, and / or a plurality of fixing blocks are arranged on the top surface of the first step;

[0016] The fixing block is used to fix the printed circuit board on the supporting device.

[0017] Optionally, it also includes a work table, which includes a table top and a table top bracket connected to the lower surface of the table top, and the touch-pressure device is installed on the work table.

[0018] Optionally, the driving component is mounted on the upper surface of the table top, an opening is provided on the table top, and the push rod passes through the opening;

[0019] When the supporting device is included, the supporting device is arranged near a side of the table top away from the upper surface of the table top.

[0020] Optionally, the work table also includes a base plate;

[0021] The bottom plate is connected to an end of the table plate bracket away from the table plate;

[0022] The supporting device is connected to a side of the bottom plate close to the table top.

[0023] Optionally, a plurality of mutually parallel straight guide holes are provided on the bottom plate;

[0024] When the supporting device comprises a first supporting block and a second supporting block,

[0025] The first support block is slidably connected to the bottom plate via a positioning guide member passing through the straight guide hole, and the first support block can slide relative to the second support block along the extension direction of the straight guide hole to adjust the distance between the first support block and the second support block;

[0026] and / or,

[0027] The second support block is slidably connected to the bottom plate via a positioning guide member passing through the straight guide hole. The second support block can slide relative to the first support block along the extension direction of the straight guide hole to adjust the distance between the first support block and the second support block.

[0028] Optionally, the positioning guide is a screw or a bolt.

[0029] Optionally, an elastic member is connected to the end surface of the first end of the push rod.

[0030] Optionally, one end of the elastic member away from the push rod is a contact and pressure end, and a cross-sectional dimension of the contact and pressure end gradually decreases in a direction away from the push rod.

[0031] Optionally, it also includes: a main control device;

[0032] The main control device is electrically connected to the touch and pressure device and is used to provide a control signal to the touch and pressure device.

[0033] Optionally, the main control device further includes: a touch display;

[0034] The touch display is used to generate a touch signal according to the detected touch operation, and the main control device generates a control signal according to the touch signal.

[0035] Optionally, the main control device also includes a communicator.

[0036] Optionally, it also includes: an alarm device for sending out an alarm signal.

[0037] The present invention proposes a printed circuit board deformation testing device, which controls a driving component to control the first end of a push rod to move back and forth between a first position and a second position, thereby performing an extrusion deformation test on a solder joint on the printed circuit board to replace a manual extrusion deformation test, thereby ensuring the precision and accuracy of the test and improving the reliability of the test result. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A diagram showing the composition of a printed circuit board deformation testing device according to an embodiment of the present invention;

[0039] Figure 2 A three-dimensional diagram of a printed circuit board deformation testing device according to an embodiment of the present invention;

[0040] Figure 3 It is a front view of a printed circuit board deformation testing device according to an embodiment of the present invention;

[0041] Figure 4 It is a left view of a printed circuit board deformation testing device according to an embodiment of the present invention;

[0042] Figure 5 A top view of a printed circuit board deformation testing device according to an embodiment of the present invention;

[0043] Figure 6 for Figure 2 A three-dimensional image of the printed circuit board deformation testing equipment after removing the main control device and table top.

[0044] The reference numerals in the figure are: 1. main control device; 2. push rod; 21. first end portion; 22. elastic member; 3. supporting device; 31. first supporting block; 311. bottom surface of first step; 312. side surface of first step; 313. top surface of first step; 32. second supporting block; 321. bottom surface of second step; 322. side surface of second step; 323. top surface of second step; 33. fixing block; 34. positioning guide member; 4. work table; 41. table top; 411. upper surface of table top; 412. lower surface of table top; 42. table top bracket; 43. bottom plate; 431. straight guide hole; 5. alarm device; 6. touch display; 7. communicator. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or appliance that includes a series of steps or devices is not necessarily limited to those steps or devices clearly listed, but may include other steps or devices that are not clearly listed or inherent to these processes, methods, products or appliances.

[0047] In the prior art, for electrical components soldered to a printed circuit board, it is necessary to detect the welding strength of the welding point. The commonly used method is to apply external force to the welding point to cause it to produce a micro-deformation, and repeat this operation to detect the welding strength of the welding point. The prior art usually uses artificial extrusion to apply stress to produce micro-deformation. It is difficult to control the manual force, resulting in low reliability of the test result and failure to achieve the expected effect. Therefore, this application proposes a printed circuit board deformation test device to replace the manual detection method, realize mechanical automatic detection, and accurately control the force and formation. Please refer to Figure 1-Figure 6 The printed circuit board deformation testing device proposed in this application includes: a touch-pressure device. The touch-pressure device includes a driving component and a push rod 2, and the driving component is used to provide a driving force for the push rod 2 so that the first end 21 of the push rod 2 moves back and forth linearly between a first position and a second position in a direction perpendicular to the printed circuit board. The application may also include a main control device 1, which is electrically connected to the touch-pressure device and is used to provide a control signal to the touch-pressure device.

[0048] In this embodiment, the main control device 1, for example, can be a programmable logic control circuit board, which has a power supply unit to supply power to it. The control signal sent by the main control device 1 to the touch pressure device can include the number of reciprocating times of the first end 21 between the first position and the second position. The second position can be the initial position of the push rod 2, that is, the position to which the push rod 2 returns after power failure or completion of reciprocating movement. The first position is another position different from the second position. The first position and the second position are adjustable. The spacing between the first position and the second position is adjustable, and the spacing can be 0-5mm. The number of reciprocating times of the first end 21 between the first position and the second position can be set. When the set number of times is reached, the driving component stops providing driving force to the push rod, and the push rod stops. It can usually be the position reached by the first end 21 after moving a first distance along the axial direction of the push rod to the side away from the second end of the push rod. The first distance can be any distance between 0-5mm, and the first distance is also the travel distance of the first end 21. For example, the push rod can be a non-retractable rod, which reciprocates between the first position and the second position along its axial direction under the drive of a servo motor that can be used as a driving component, and the solder joint that needs to be deformed is placed between the first position and the second position. For example, the first end 21 moves 10mm from the second position as the initial position along the axial direction of the push rod to the direction away from the first end 21 of the push rod. The printed circuit board can be set perpendicular to the axial direction of the push rod. When the first end 21 of the push rod moves 8mm, it contacts the solder joint that needs to be tested. After that, the push rod continues to move 2mm under the action of the driving force provided by the driving component, so that the solder joint is deformed by about 2mm. Then the push rod can stay at the first position for a certain time and then gradually return to the second position, thereby completing an extrusion test. The control signal can include the distance moved by the first end 21, that is, the first position can be changed. According to the needs of the extrusion test, the length of the first end 21 moving along the axial direction can be set to change the deformation at the solder joint, or to adapt to printed circuit boards at different positions. In addition, the push rod 2 can also be a retractable rod, for example, by rotating or stretching, the first end 21 of the push rod 2 moves axially in a direction away from the second end of the push rod 2, so as to reach the first position from the second position, and then shrink back to the second position, and the second end of the push rod 2 remains stationary during the entire extrusion test. Compared with the prior art, the present application uses a driving component and a push rod to perform a solder joint extrusion test on a printed circuit board, so that the movement of the first end 21 can be accurately controlled to ensure that the extrusion step length is the same and the deformation amount is consistent each time. It is preferred to use a servo motor as a driving component and a screw rod as a push rod to further improve accuracy and consistency. The distance between the first position and the second position can be adjusted, so that the deformation amount of the solder joint can be set accordingly according to different detection needs. Optionally, the driving component can be a hydraulic press, which drives the push rod to move through a crank-connecting rod mechanism.

[0049] Preferably, in some optional embodiments, it also includes: a supporting device 3, used for detachably installing a printed circuit board, that is, the printed circuit board can be detachably installed on the supporting device; when the printed circuit board is installed on the supporting device 3 and the first end 21 is in the first position, the first end 21 is in contact with any solder joint on the printed circuit board; when the printed circuit board is installed on the supporting device 3 and the first end 21 is in the second position, the first end 21 is separated from the printed circuit board.

[0050] In this embodiment, the printed circuit board is detachably mounted on the support device 3. When the printed circuit board is in contact with the support device 3, the support device 3 ensures that the printed circuit board will not move during the entire detection process, thereby ensuring that the first end 21 always detects the same solder joint and preventing the detection point from shifting due to vibration. Optionally, the support device 3 is arranged on a spring plate, the spring plate includes a support plate and a spring connected to the support plate, the support device is located on the side of the spring plate away from the spring, the push rod is located on the side of the support device away from the spring plate, the printed circuit board can be located between the support device and the push rod, and is installed on the support device, so when the push rod contacts the printed circuit board on the support device 3, if the thrust of the push rod is too large, the spring of the spring plate will be compressed, thereby preventing damage to the printed circuit board, and by setting the spring plate, it is ensured that the stress borne by the printed circuit board will not be too large. When the first end 21 is at the second position, the push rod 2 does not contact any point on the printed circuit board. When the first end 21 moves from the second position to the first position, the first end 21 contacts the solder joint to be detected. At this time, there may be a squeezing force between the first end 21 and the solder joint to be detected, so that the printed circuit board is slightly deformed. The squeezing force between the two is proportional to the deformation amount of the printed circuit board. The deformation amount on the printed circuit board is controlled by controlling the displacement of the first end 21. Since the displacement of the push rod can be precisely controlled by, for example, a servo motor, the accuracy of the deformation amount can be guaranteed.

[0051] Preferably, in some optional embodiments, the support device 3 includes a first support block 31 and a second support block 32 that are spaced apart; when a printed circuit board is mounted on the support device, one end of the printed circuit board is detachably mounted on the first support block, and / or the other end of the printed circuit board is detachably mounted on the second support block. For example, the two ends of the printed circuit board can be fixed on the first upper surface of the first support block and the second upper surface of the second support block, respectively.

[0052] In this embodiment, when the printed circuit board is mounted on the supporting device, the middle part of the printed circuit board is suspended, and the solder joint to be detected is usually displaced from the suspended middle part of the printed circuit board. Therefore, when the first end 21 moves toward the printed circuit board along the axial direction of the push rod from a plane perpendicular to the printed circuit board and contacts the solder joint to be detected, the printed circuit board will bend to the side away from the push rod, thereby preventing the printed circuit board from being damaged due to excessive pressure from the push rod. In addition, the spacing between the first support block 31 and the second support block 32 is adjustable, so the spacing between the two can be increased or decreased to adapt to printed circuit boards of different lengths or widths, greatly expanding the size range of printed circuit boards that can be detected. Optionally, the first support block 31 and the second support block 32 have the same structure, which is convenient for manufacturing.

[0053] Preferably, in some optional embodiments, the upper end of the first support block 31 is a first step structure, and the upper end of the second support block 32 is a second step structure;

[0054] The first step structure includes a first step bottom surface 311, a first step side surface 312 and a first step top surface 313; the second step structure includes a second step bottom surface 321, a second step side surface 322 and a second step top surface 323, and the first step side surface 312 and the second step side surface 322 are arranged opposite to each other;

[0055] When the printed circuit board is mounted on the supporting device, two ends of the printed circuit board are respectively located on the first step bottom surface 311 and the second step bottom surface 321, and the printed circuit board is clamped between the first supporting block 31 and the second supporting block 32 by the first step side surface 312 and the second step side surface 322.

[0056] Please see Figure 3-Figure 6In this embodiment, the upper surface of the first support block is concave inward near the edge of the second support block 32 to form a first step structure, and the upper surface of the second support block is concave inward near the edge of the first support block 31 to form a second step structure. The plane where the first step bottom surface 311 and the second step bottom surface 321 are located can be the same plane, and the plane where the first step top surface 313 and the second step top surface 323 are located can be the same plane. When the printed circuit board is installed on the support device 3, it can move along the extension direction of the first step bottom surface 311, and the extension direction intersects with the spacing direction of the first support block 31 and the second support block 32, so that the printed circuit board can be moved without moving the first support block 31 and the second support block 32, so that the solder joint to be detected can be easily changed. Optionally, two slide grooves can be respectively opened on the opposite surfaces of the first support block and the second support block, and the openings of the two slide grooves are opposite and parallel. The two ends of the printed circuit board are respectively inserted into the two slide grooves, so that the printed circuit board can move along the extension direction of the slide groove, and the extension direction of the slide groove can be different from the spacing direction of the first support block and the second support block.

[0057] Preferably, in some optional embodiments, a plurality of fixing blocks 33 are provided on the top surface 313 of the first step, and / or a plurality of fixing blocks 33 are provided on the top surface 313 of the first step; the fixing blocks 33 are used to fix the printed circuit board on the supporting device 3 .

[0058] Please see Figure 2-Figure 6 The fixed block 33 may be fixed on the first step top surface 313 and the first step bottom surface 311 by screws, for example. The fixed block 33 may rotate around the screws so that the projection of the fixed block 33 on the first step bottom surface 311 overlaps or does not overlap with the first step bottom surface. When the projection of the fixed block 33 on the first step bottom surface 311 overlaps with the first step bottom surface 311, it may be in a fixed state. At this time, one end of the printed circuit board may be located between the fixed block and the first step bottom surface, and is squeezed and fixed on the support device 3 by the fixed block 33. When the fixed block 33 is rotated so that the projection of the fixed block 33 on the first step bottom surface 311 does not overlap with the first step bottom surface, it may be in an open state. At this time, the printed circuit board is not fixed by the fixed block 33. The number of the fixed blocks 33 may be multiple, and they are arranged at intervals along the length direction of the first step top surface 313 and / or the second step top surface 323. Optionally, the number is 2 or more, preferably 10. By providing the fixed block 33, it is relatively convenient to fix the printed circuit board on the support device 3 or remove it from the support device 3.

[0059] Preferably, in some optional embodiments, a work table 4 is further included, including a table top 41 and a table top bracket 42 connected to the lower surface 412 of the table top. Optionally, the main control device 1 is installed on the upper surface 411 of the table top, and an opening is opened on the table top 41, and the push rod 2 passes through the opening; the support device 3 is arranged on a side close to the table top 41 and away from the upper surface 411 of the table top.

[0060] In this embodiment, the main control device 1 is installed on the workbench 4, and the driving component can be installed together with the main control device, so as to increase the total weight and improve stability. Because the device proposed in this application detects the welding conditions of smaller solder joints, the positioning requirements between the first end 21 and the solder joint are relatively high. During the detection process, there should be no relative movement between the first end 21 and the solder joint being detected. Therefore, the main control device 1 and the driving component can be fixed on the workbench 4 to prevent the first end 21 from vibrating during reciprocating motion and causing the detection solder joint to deviate, thereby ensuring the alignment accuracy.

[0061] Preferably, in some optional embodiments, the workbench 4 also includes a bottom plate 43; the bottom plate 43 is connected to the end of the table support 42 away from the table 41; the support device 3 is connected to the side of the bottom plate 43 close to the table 41. In order to prevent the relative movement between the detected welding point and the first end 21 during the inspection process, the equipment of the present application is connected to the workbench 4, so that the relative movement between the various devices can be prevented, so that when the first end 21 performs an extrusion inspection on the welding point, each device will not be displaced due to the transmission of the driving component, thereby ensuring the accurate alignment between the first end 21 and the welding point.

[0062] Preferably, in some optional embodiments, a plurality of mutually parallel straight guide holes 431 are provided on the bottom plate 43; when the support device 3 includes a first support block 31 and a second support block 32, the first support block 31 is slidably connected to the bottom plate 43 through a positioning guide 34 passing through the straight guide hole, and the first support block 31 can slide relative to the second support block along the extension direction of the straight guide hole to adjust the spacing between the first support block 31 and the second support block 32; and / or, the second support block 32 is slidably connected to the bottom plate 43 through a positioning guide 34 passing through the straight guide hole, and the second support block 32 can slide relative to the first support block 31 along the extension direction of the straight guide hole to adjust the spacing between the first support block 31 and the second support block 32. Optionally, the positioning guide 34 is a screw or a bolt.

[0063] In this embodiment, the straight guide hole is a channel for the first support block 31 or the second support block 32 to move, and plays a role in positioning and guiding. The first support block 31 and the second support block 32 slide relative to each other in the extension direction of the straight guide hole through the positioning guide member 34, so as to adjust the distance between the two to adapt to printed circuit boards of different sizes. The number of the strip guide holes can be 2 or 3.

[0064] Preferably, in some optional embodiments, an elastic member 22 is connected to the end surface of the first end 21 of the push rod 2. Optionally, the elastic member 22 can be made of rubber material. Repeated contact between the first end 21 and the solder joint may cause damage to the remaining circuits other than the solder joint, so it is preferred to use an elastic member 22 to prevent the first end 21 from causing unnecessary damage to the printed circuit board. In the present application, the elastic member can be detachably sleeved on the first end, that is, the elastic member can be replaced as needed. For different solder joints, the solder joint sizes are inconsistent, and the use of a unified elastic member cannot meet the detection needs. Therefore, a detachable setting is adopted, and the elastic member can be replaced according to specific needs.

[0065] Preferably, in some optional embodiments, please refer to Figure 3 ,, the end of the elastic member 22 away from the push rod is the touch-pressure end, and the cross-sectional size of the touch-pressure end gradually decreases in the direction away from the push rod 2. The size of the weld to be detected is often small, while the cross-sectional size of the push rod is often large. Therefore, it is necessary to set the cross-sectional size of the end of the touch-pressure end close to the weld to be detected to gradually decrease to match the weld to be detected without reducing the size of the push rod. If the size of the push rod is too small, it is easy to bend and deform during repeated use. The present application solves this problem, and ensures the strength of the push rod while ensuring that it matches the weld and prevents its deformation.

[0066] Preferably, in some optional embodiments, it further comprises: an alarm device 5, which is electrically connected to the main control device 1. When the device proposed in the present application is abnormal, the alarm device 5 will alarm the user to avoid danger. In addition, when the number of times the first end 21 reciprocates between the first position and the second position reaches a preset value, the alarm device 5 will also send a light signal or a sound signal to remind the user, the driving component stops providing driving force, and the push rod stops moving.

[0067] Preferably, in some optional embodiments, it also includes: a touch display 6; the touch display 6 is used to send a touch signal to the main control device 1 according to the detected touch operation, and the main control device 1 generates a control signal according to the touch signal. The touch display 6 can be integrated with the main control device 1, for example, it can be a touch display screen, which is used to set the distance of movement of the first end 21, that is, the distance required to travel from the second position to the first position, and can also set the number of times the first end 21 reciprocates between the first position and the second position, and can also control the driving component to pause or stop. Optionally, it also includes: a communicator 7, which is electrically connected to the main control device 1. It can be any electrical interface, or a wireless communication module, used to transmit data with a mobile terminal or a computer terminal, or used to program and control the main control device 1.

[0068] In order to better illustrate the beneficial effects of the present application, a preferred embodiment is proposed below.

[0069] In this embodiment, the control stroke set by the main control device can achieve precision and consistency in the extrusion step length. The stroke, that is, the distance between the first position and the second position, can be adjusted between 0 and 5 mm, and reliability tests of different deformation degrees can be completed. The number of tests set by the main control device, that is, the number of times the first end reciprocates between the first position and the second position, is automatically counted. When the preset number of tests is reached, the driving component stops, and the alarm device generates a buzzer alarm prompt. In this embodiment, the fixing device of the printed circuit board can be adjusted at will, and reliability testing of the solder joints of any component thereon can be achieved. A touch display panel is connected to the main control device, and the relevant parameters of the test are set by touch buttons.

[0070] The device proposed in this embodiment includes a 12V power supply device, a main control device, a driving component, an alarm device, a communicator and a touch display. The driving component drives the push rod to move, thereby pushing the rubber contact located at the first end to reciprocate between the initial position point (second position) and the set position point (first position). At the same time, the printed circuit board is fixed by a movable first support block and a second support block. When in use, after the 12V power supply device of the device is powered, each device is in a ready state. First, click the "Set" button on the touch display to set the relevant operating parameters for the main control device, such as the stroke and the number of reciprocating times. The main control device stores the relevant parameters and performs the push rod downward and upward actions in real time according to the touch function signal generated by the touch. The rubber contact moves back and forth between the initial point (second position) and the test point (first position). When the preset number of operations is reached, the push rod stops moving, and the alarm device gives an audible and visual alarm, indicating that the test is completed. During the operation, you can also click "Pause" on the touch display to temporarily stop the test. It can also be operated in manual mode, by clicking the "up" or "down" button on the touch display, the push rod drives the rubber contact push rod to move up or down. In addition, the device proposed in this application also has a communicator, such as a communication interface, which can realize the function of communicating with other devices.

[0071] In this embodiment, the first support block and the second support block are each fixed to the base plate of the work table by two screws, and the screws pass through the straight guide holes on the base plate, so that the first support block and the second support block can move relative to each other to adjust the distance between them, thereby meeting the fixation of printed circuit boards of different sizes.

[0072] The present invention proposes a printed circuit board deformation testing device, which controls a driving component to control the first end of a push rod to move back and forth between a first position and a second position, thereby performing an extrusion deformation test on a solder joint on the printed circuit board to replace a manual extrusion deformation test, thereby ensuring the precision and accuracy of the test and improving the reliability of the test result.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A printed circuit board deformation testing device, characterized in that: include: A touch-pressing device, comprising a driving component and a push rod (2), wherein the driving component is used to provide a driving force for the push rod (2) so that a first end portion (21) of the push rod (2) performs a linear reciprocating motion between a first position and a second position in a direction perpendicular to a printed circuit board; When the first end portion (21) is in the first position, the first end portion (21) is pressed against any soldering point on the printed circuit board; When the first end portion (21) is in the second position, the first end portion (21) is separated from the printed circuit board; The device further comprises: a support device (3), wherein the printed circuit board can be detachably mounted on the support device (3), wherein the support device (3) comprises a first support block (31) and a second support block (32), wherein the upper end of the first support block (31) is a first step structure, and the upper end of the second support block (32) is a second step structure, wherein the first step structure comprises a first step top surface (313), a first step bottom surface (311) and a first step side surface (312), and the second step structure comprises a second step top surface (323), a second step bottom surface (321) and a second step side surface (322), wherein the first step side surface (312) and the second step side surface (322) are arranged opposite to each other; when the printed circuit board is mounted on the support device (3), the two ends of the printed circuit board are respectively located on the first step bottom surface (311) and the second step bottom surface (321), and the printed circuit board is clamped between the first support block (31) and the second support block (32) by the first step side surface (312) and the second step side surface (322); A plurality of fixing blocks (33) are arranged on the top surface (313) of the first step, and a plurality of fixing blocks (33) are arranged on the top surface (323) of the second step. The fixing blocks (33) are fixed to the top surface (313) of the first step by screws. The fixing blocks (33) can rotate around the screws so that the projection of the fixing blocks (33) on the bottom surface of the corresponding step overlaps or does not overlap with the bottom surface of the corresponding step. The fixing blocks (33) are used to fix the printed circuit board on the supporting device (3); When the projection of the fixing block (33) on the bottom surface of the corresponding step overlaps with the bottom surface of the corresponding step, the printed circuit board is pressed and fixed on the supporting device (3) by the fixing block (33); when the projection of the fixing block (33) on the bottom surface of the corresponding step does not overlap with the bottom surface of the corresponding step, the printed circuit board is not fixed by the fixing block (33).

2. The printed circuit board deformation testing device according to claim 1, characterized in that: The first support block (31) and the second support block (32) are arranged at an interval; When the printed circuit board is mounted on the supporting device, one end of the printed circuit board is detachably mounted on the first supporting block, and / or the other end of the printed circuit board is detachably mounted on the second supporting block.

3. The printed circuit board deformation testing device according to claim 1, characterized in that: It also includes a work table (4), the work table including a table top (41) and a table top bracket (42) connected to the lower surface (412) of the table top, and the touch-pressure device is installed on the work table.

4. The printed circuit board deformation testing device according to claim 3, characterized in that: The driving component is mounted on the upper surface (411) of the table top; an opening is provided on the table top (41), and the push rod (2) passes through the opening; The supporting device (3) is arranged on a side close to the table top (41) and away from the upper surface (411) of the table top.

5. The printed circuit board deformation testing device according to claim 4, characterized in that: The work table (4) further comprises a bottom plate (43); The bottom plate (43) is connected to an end of the table top bracket (42) away from the table top (41); The supporting device (3) is connected to a surface of the bottom plate (43) close to the table top (41).

6. The printed circuit board deformation testing device according to claim 5, characterized in that: The bottom plate (43) is provided with a plurality of mutually parallel straight guide holes (431); When the supporting device (3) comprises a first supporting block (31) and a second supporting block (32), The first support block (31) is slidably connected to the bottom plate (43) via a positioning guide member (34) passing through the straight guide hole, and the first support block (31) can slide relative to the second support block along the extension direction of the straight guide hole (431) to adjust the distance between the first support block (31) and the second support block (32); and / or, The second support block (32) is slidably connected to the bottom plate (43) via a positioning guide member (34) passing through the straight guide hole; the second support block (32) can slide relative to the first support block (31) along the extension direction of the straight guide hole (431) to adjust the distance between the first support block (31) and the second support block (32).

7. The printed circuit board deformation testing device according to claim 6, characterized in that: The positioning guide member (34) is a screw or a bolt.

8. The printed circuit board deformation testing device according to claim 1, characterized in that: An elastic member (22) is connected to the end surface of the first end portion (21) of the push rod (2).

9. The printed circuit board deformation testing device according to claim 8, characterized in that: One end of the elastic member (22) away from the push rod is a contact and pressure end, and the cross-sectional dimensions of the contact and pressure end gradually decrease in a direction away from the push rod (2).

10. The printed circuit board deformation testing device according to claim 1, characterized in that: Also includes: Main control device (1); The main control device (1) is electrically connected to the touch and pressure device and is used to provide a control signal to the touch and pressure device.

11. The printed circuit board deformation testing device according to claim 10, characterized in that: The main control device (1) further comprises: a touch display (6); The touch display (6) is used to generate a touch signal according to a detected touch operation, and the main control device (1) generates the control signal according to the touch signal.

12. The printed circuit board deformation testing device according to claim 10, characterized in that: The main control device (1) also includes a communicator (7).

13. The printed circuit board deformation testing device according to any one of claims 1, 4-7, 9, 11 or 12, characterized in that: Also includes: The alarm device (5) is used to send out an alarm signal.

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