A PCB circuit board fracture resistance detection device and detection method

Abstract

The present invention relates to the field of circuit board detection technology, and in particular to a PCB circuit board anti-fracture ability detection device and detection method thereof. It comprises a plurality of groups of pressure detection units arranged at equal intervals, wherein the pressure detection unit is symmetrically provided with an upper propulsion unit and a lower propulsion unit; the pressure detection unit comprises two groups of middle inspection plates arranged symmetrically; two groups of second pleated cloth covers are symmetrically provided on both sides of the middle inspection plate; a group of side inspection plates are installed on the side of the two groups of the second pleated cloth covers away from the middle inspection plate; a group of crescent plates with a fan-shaped cross-section in side view are provided between the two groups of side inspection plates symmetrically provided; one side of the two groups of crescent plates is connected to a group of angle adjustment units in transmission. While realizing vertical pressure, the present invention also realizes torsion detection in multiple positions and directions. It not only enriches the functionality of the device, but also improves the accuracy of detection.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit board detection, and in particular relates to a PCB circuit board fracture resistance detection device and a detection method thereof. Background Art

[0002] After the PCB circuit board is produced, it needs to be tested in different aspects, especially the circuit board's anti-fracture ability is particularly important, which can detect the strength of the circuit board when subjected to external force.

[0003] After searching, the patent document with the publication number of CN118392680A and the publication date of July 26, 2024, entitled "A circuit board bending performance test device and method thereof", includes a bottom plate and a circuit board body, and also includes: a clamp group for clamping and fixing the circuit board body, and the clamp group includes a first U-shaped plate and a second U-shaped plate, the side wall of the first U-shaped plate is provided with two symmetrically arranged first movable plates, and a plurality of array-arranged movable blocks are arranged between the opposite side walls of the two first movable plates, the opposite side walls of the movable blocks are fixedly connected with a U-shaped seat, and the side walls of the U-shaped seat are rotatably connected with rollers through a rotating shaft, and the opposite side walls of the movable blocks are fixedly inserted with a visual sensor. The above embodiment can clamp and fix the circuit board body, facilitate the centering clamping and fixing of the circuit board body, and avoid the electronic components on the circuit board body, etc., to ensure that it is pressed on the body of the circuit board body to avoid damage, and to ensure the clamping effect, thereby ensuring the effect of subsequent testing.

[0004] However, the above embodiment still has the following defects:

[0005] The above embodiment can only realize the bending performance test of a single part and a single direction of the circuit board, and cannot realize the free switching of direction and part according to needs, resulting in reduced functionality and affecting the accuracy of detection. Summary of the invention

[0006] In view of the above problems, the present invention provides a PCB circuit board fracture resistance detection device, comprising a plurality of groups of pressure detection units arranged at equal intervals, wherein the pressure detection unit is symmetrically provided with an upper propulsion unit and a lower propulsion unit;

[0007] The pressure detection unit includes two groups of central inspection plates symmetrically arranged in an upper and lower manner; two groups of second pleated cloth covers are symmetrically arranged on both sides of the central inspection plate; a group of side inspection plates are installed on the side of the two groups of second pleated cloth covers away from the central inspection plate; a group of crescent plates with a fan-shaped cross-section in side view are arranged between the two groups of side inspection plates symmetrical to each other in an upper and lower manner; one side of the two groups of crescent plates is transmission-connected with a group of angle adjustment units; a number of groups of second springs are arranged at equal intervals in the second pleated cloth cover, and a group of pestle rod through holes are provided between two adjacent groups of the second springs; a number of groups of second sleeves are evenly distributed on the central inspection plate and the side inspection plates; a fixing rod is provided in the second sleeve, and both ends of the fixing rod extend to the outside of the second sleeve, one end of which is connected to the upper propulsion unit or the lower propulsion unit, and the other end is provided with a pressure head.

[0008] Furthermore, the detection device also includes two groups of horizontally arranged transmission units, the two groups of transmission units are symmetrically arranged with each other, the transmission units include a first motor and a first rotating rod, the first motor and the first rotating rod are symmetrically arranged at both ends of a plurality of groups of angle adjustment unit arrays on the same side; a group of pulleys are installed on the top of the first motor and the first rotating rod, a conveyor belt is connected for transmission between the two groups of pulleys, and the conveyor belt runs through the center of the crescent plate in a horizontal direction.

[0009] Furthermore, a plurality of groups of platforms are arranged at equal intervals on the side wall of the conveyor belt, and a group of bayonet holes are opened on a side wall of each group of platforms away from the conveyor belt, and both ends of the bayonet holes are open structures.

[0010] Furthermore, the angle adjustment unit includes a side column, an arc groove is provided on one side wall of the side column close to the central axis of the workbench, and the side cross-section of the arc groove is a fan-shaped structure; a gear opening is provided at the center of the arc groove, and a second motor is installed on one side wall of the side column, and the output end of the second motor extends into the side column and is transmission-connected with a transmission gear, one side of the transmission gear extends into the arc groove through the gear opening, and is transmission-connected with a corresponding group of pressure detection units; two groups of slide grooves are symmetrically provided on both sides of the gear opening.

[0011] Furthermore, a crescent tooth bar with a fan-shaped structure in side view is provided on the outer wall of the crescent plate, and the crescent tooth bar is meshed and connected to a corresponding set of transmission gears; two groups of sliders are symmetrically provided on both sides of the crescent tooth bar, and each group of sliders is slidably connected in a corresponding set of slide grooves.

[0012] Furthermore, the upper propulsion unit includes a middle pressure plate, on which a first electric push rod is provided; two groups of first pleated cloth covers are symmetrically provided on both sides of the middle pressure plate, and a plurality of groups of first springs are arranged at equal intervals inside the first pleated cloth covers along its own length direction; a group of side pressure plates are installed on the side of the two groups of the first pleated cloth covers away from the middle pressure plate, and a side wall of the side pressure plate away from the middle pressure plate is set to an arc angle.

[0013] Furthermore, a plurality of groups of through holes are evenly distributed on the bottom of the middle pressure plate and the side pressure plate, and the openings of the through holes are connected to the first sleeve; the number of the first sleeves is the same as the second sleeves, and each group of the second sleeves coincides with the central axis of the corresponding group of first sleeves; a first micro-electric cylinder is installed on the inner wall of the through hole away from the opening, and a resist plate is installed on the output end of the first micro-electric cylinder, and the resist plate is movable through the first micro-electric cylinder to penetrate into the first sleeve.

[0014] Furthermore, a set of retaining rings are provided at the openings at both ends of the second sleeve; a third spring is sleeved on a section of the fixed rod located in the second sleeve, and a pressure ring is installed on the fixed rod, and the pressure ring and the third spring are in conflict with each other.

[0015] Furthermore, a plurality of groups of pressure strips are distributed in a circular array at one end of the pressure head away from the fixing rod, and the plurality of groups of pressure strips extend radially from the central axis of the pressure head to the surrounding areas, and each group of pressure strips has a plurality of groups of sawtooth grooves arranged at equal intervals.

[0016] A detection method for a PCB circuit board fracture resistance detection device, the detection method comprising:

[0017] Transporting the circuit board to each group of pressure detection units;

[0018] Control the relative movement of the upper propulsion unit and the lower propulsion unit to fix the circuit board in both directions from the upper and lower sides;

[0019] The upper propulsion unit and the lower propulsion unit are controlled to continuously apply pressure to the circuit board from both sides, so as to complete the anti-fracture test of the circuit board in the vertical direction;

[0020] Start the angle adjustment units on both sides so that the pressure detection unit as a whole drives the corresponding parts of the circuit board to twist;

[0021] After the two sets of angle adjustment units drive the two sets of crescent plates to deflect in the same direction, they then drive the two sets of crescent plates to deflect in opposite directions, thereby realizing free switching between unidirectional and bidirectional torsion tests on the circuit board.

[0022] The beneficial effects of the present invention are:

[0023] 1. After the pressure test in the vertical direction is completed, the angle adjustment units on both sides are started, so that the pressure detection unit as a whole drives the corresponding parts of the circuit board to twist, realizing the torsion test of the circuit board, so as to detect the anti-fracture ability of the circuit board when torque is caused. In addition, each group of pressure detection units can adjust the deflection angle separately, so that different parts of the circuit board can be tested with different strengths and directions at the same time. In addition, the two symmetrical groups of angle adjustment units can make the circuit board freely switch between unidirectional and bidirectional torsion tests, and realize multi-part and multi-directional torsion detection while realizing vertical pressure. It not only enriches the functionality of the device, but also improves the accuracy of detection.

[0024] 2. The first micro-electric cylinder drives the plate to move to the perforation opening, and then pushes the upper propulsion unit and the lower propulsion unit to move relative to each other. The plate that has moved to the perforation opening pushes the corresponding set of fixed rods and the pressure head to move toward the circuit board until they contact the circuit board. The fixed rods corresponding to the perforations that have not been opened by the first micro-electric cylinder will remain stationary, and the end away from the pressure head will also penetrate into the perforation. In this way, the free adjustment of the pressurized position and pressurized amount of the circuit board is realized, thereby improving the compatibility of the device.

[0025] 3. Start the two first motors at the same time, drive the two conveyor belts to move, and then insert the edges of the two sides of the circuit board into the two corresponding bayonet holes on the two conveyor belts, and use the two conveyor belts to transport the circuit board to each pressure detection unit. This not only realizes automatic loading, but also does not affect the simultaneous detection of the upper and lower walls of the circuit board, thereby improving the convenience of circuit board detection.

[0026] 4. Each group of pressure strips radiates radially from the central axis of the pressure head to the surrounding areas, which allows the additional pressure generated by the contact point between the pressure head and the circuit board to be evenly distributed to the surrounding areas, avoiding additional damage to the circuit board beyond the vertical direction detection, ensuring the accuracy of vertical detection. At the same time, using each group of serrated grooves, the concave and convex parts of the circuit board surface can be included, so that the pressure strips can be completely attached to the circuit board, thereby ensuring stability during detection.

[0027] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of a detection device according to an embodiment of the present invention is shown.

[0030] Figure 2 A schematic structural diagram of a transmission unit according to an embodiment of the present invention is shown.

[0031] Figure 3 The embodiment of the present invention is shown Figure 2 Enlarged schematic diagram within circle A in the middle.

[0032] Figure 4 A structural schematic diagram of an angle adjustment module according to an embodiment of the present invention is shown.

[0033] Figure 5 A schematic structural diagram of an angle adjustment unit according to an embodiment of the present invention is shown.

[0034] Figure 6 A bottom view schematically shows an upper propulsion unit according to an embodiment of the present invention.

[0035] Figure 7 A schematic cross-sectional view of an upper propulsion unit according to an embodiment of the present invention is shown.

[0036] Figure 8 A schematic top cross-sectional view of a first pleated fabric cover according to an embodiment of the present invention is shown.

[0037] Fig. 9 A schematic structural diagram of a pressure detection unit according to an embodiment of the present invention is shown.

[0038] Fig.10 A cross-sectional schematic diagram of a center inspection plate according to an embodiment of the present invention is shown.

[0039] Fig.11 A schematic top cross-sectional view of a second pleated fabric cover according to an embodiment of the present invention is shown.

[0040] Fig.12 A bottom view schematically shows a pressure head according to an embodiment of the present invention.

[0041] In the figure: 100, workbench; 200, transmission unit; 210, first motor; 220, pulley; 230, first rotating rod; 240, conveyor belt; 250, platform; 260, bayonet; 300, angle adjustment unit; 310, side column; 320, arc groove; 330, gear opening; 340, second motor; 350, transmission gear; 360, slide; 400, first electric push rod; 410, cross bar; 500, upper propulsion unit; 510, middle pressure plate; 520, first pleated cloth cover; 521, first spring; 530, side pressure plate; 531, arc angle; 54 0, perforation; 541, first sleeve; 550, first micro-electric cylinder; 551, abutment plate; 600, pressure detection unit; 610, middle inspection plate; 620, second pleated cloth cover; 621, pestle rod through hole; 622, second spring; 630, side inspection plate; 640, crescent plate; 641, crescent strip; 642, slider; 650, second sleeve; 651, retaining ring; 660, fixing rod; 661, third spring; 662, pressing ring; 670, pressure head; 671, pressure strip; 672, serrated groove; 680, side groove; 690, second micro-electric cylinder; 691, pestle rod. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0043] The embodiment of the present invention provides a PCB circuit board anti-fracture ability detection device, exemplarily, as Figure 1 As shown, it comprises a workbench 100, and two groups of conveying units 200 are symmetrically arranged on the top of the workbench 100 with its longitudinal central axis as the center. The conveying unit 200 is used to convey the circuit board.

[0044] The conveying unit 200 is arranged horizontally, and an angle adjustment module is arranged between the belt bodies on both sides of the conveying unit 200. The angle adjustment module includes a plurality of groups of angle adjustment units 300 arranged at equal intervals. The angle adjustment unit 300 is used to twist the circuit board.

[0045] A group of pressure detection units 600 are both connected to each other through transmission between the two symmetrical groups of angle adjustment units 300. An upper propulsion unit 500 and a lower propulsion unit are symmetrically arranged on the upper and lower sides of each group of pressure detection units 600. The upper propulsion unit 500 and the lower propulsion unit have the same structure. The upper propulsion unit 500 is used to propel the pressure detection unit 600 so that the pressure detection unit 600 applies pressure to the circuit board.

[0046] Two groups of first electric push rods 400 are symmetrically arranged just above and just below the gap between the two groups of the angle adjustment modules, and a group of cross bars 410 are arranged on the output ends of the two groups of the first electric push rods 400.

[0047] Each set of the upper propulsion unit 500 and the lower propulsion unit is installed on a corresponding set of cross bars 410 .

[0048] For example, Figure 2 and Figure 3 As shown, the transmission unit 200 includes a first motor 210 and a first rotating rod 230, and the first motor 210 and the first rotating rod 230 are symmetrically arranged at the two ends of a corresponding set of angle adjustment modules. A set of pulleys 220 are installed on the top of the first motor 210 and the first rotating rod 230, and a conveyor belt 240 is connected between the two sets of pulleys 220. A plurality of sets of platforms 250 are arranged at equal intervals on the side wall of the conveyor belt 240, and a set of bayonet 260 is opened on the side wall of each set of the platforms 250 away from the conveyor belt 240, and both ends of the bayonet 260 are open structures.

[0049] The two sets of first motors 210 are turned on at the same time, and the two sets of conveyor belts 240 are driven by the two sets of first motors 210 to move, and then the edges of the two sides of the circuit board are respectively inserted into the two sets of corresponding bayonet holes 260 on the two sets of conveyor belts 240, and the circuit board is transported to each set of pressure detection units 600 by using the two sets of conveyor belts 240. Not only automatic loading is achieved, but also the simultaneous detection of the upper and lower side walls of the circuit board will not be affected, thereby improving the convenience of circuit board detection.

[0050] For example, Figure 4 and Figure 5As shown, the angle adjustment unit 300 includes a side column 310, and an arc groove 320 is provided on a side wall of the side column 310 close to the central axis of the workbench 100, and the side view cross section of the arc groove 320 is a fan ring structure. A gear opening 330 is provided at the center of the arc groove 320, and a second motor 340 is installed on a side wall of the side column 310. The output end of the second motor 340 extends into the side column 310 and is connected to a transmission gear 350. One side of the transmission gear 350 extends into the arc groove 320 through the gear opening 330 and is connected to a corresponding group of pressure detection units 600. Two groups of slide grooves 360 are symmetrically provided on both sides of the gear opening 330.

[0051] After each group of pressure detection units 600 fixes different points of the circuit board from both the upper and lower directions, the second motor 340 is turned on, and the transmission gear 350 is driven to rotate by the second motor 340. The transmission gear 350 then drives the corresponding group of pressure detection units 600 to adjust the angle, so that the corresponding part of the circuit board is subjected to torque. While using the upper propulsion unit 500 and the lower propulsion unit to perform pressure detection, the detection items are also enriched.

[0052] For example, Figure 6 , Figure 7 and Figure 8 As shown, the upper propulsion unit 500 includes a middle pressure plate 510, and the middle pressure plate 510 is installed on a corresponding set of cross bars 410. Two sets of first pleated cloth sleeves 520 are symmetrically arranged on both sides of the middle pressure plate 510, and a plurality of sets of first springs 521 are arranged at equal intervals in the first pleated cloth sleeve 520 along its own length direction. A set of side pressure plates 530 are installed on the side of the two sets of the first pleated cloth sleeves 520 away from the middle pressure plate 510, and a side wall of the side pressure plate 530 away from the middle pressure plate 510 is set as an arc angle 531.

[0053] Exemplarily, the bottom of the middle pressure plate 510 and the side pressure plate 530 are evenly distributed with a plurality of groups of through holes 540, and the openings of the through holes 540 are connected with the first sleeve 541. A first micro-electric cylinder 550 is installed on the inner wall of the through hole 540 away from the opening, and a stop plate 551 is installed on the output end of the first micro-electric cylinder 550, and the stop plate 551 is movably penetrated into the first sleeve 541 through the first micro-electric cylinder 550.

[0054] According to the detection requirements, the part where the circuit board needs to be fixed is selected, and then a group of first micro-electric cylinders 550 corresponding to the part is started, and the first micro-electric cylinders 550 drive the plate 551 to move to the junction of the perforation 540 and the first sleeve 541. Then the two groups of first electric push rods 400 are started, and the first electric push rods 400 push the upper propulsion unit 500 and the lower propulsion unit to move in relative directions until the circuit board is fixed. This allows the device to freely select the part where pressure is applied to the circuit board according to the detection requirements.

[0055] For example, Fig. 9 , Fig.10 and Fig.11 As shown, the pressure detection unit 600 includes two groups of central inspection plates 610 symmetrically arranged in the upper and lower parts, and two groups of second pleated cloth covers 620 are symmetrically arranged on both sides of the central inspection plate 610. Several groups of second springs 622 are arranged in the second pleated cloth covers 620 at equal intervals along its own length direction, and a group of pestle rod through holes 621 are arranged between two adjacent groups of the second springs 622. A group of side inspection plates 630 are installed on the side of the two groups of the second pleated cloth covers 620 away from the central inspection plate 610, and a group of crescent plates 640 with a fan-shaped cross-section are installed between the two groups of side inspection plates 630 symmetrically arranged in the upper and lower parts, and the conveyor belt 240 passes through the center of the crescent plates 640 in the horizontal direction. The two groups of central inspection plates 610, the two groups of crescent plates 640, the four groups of second pleated cloth covers 620 and the four groups of side inspection plates 630 form an elliptical structure.

[0056] For example, a crescent tooth bar 641 having a fan-shaped cross section in side view is provided on the outer wall of the crescent plate 640, and the crescent tooth bar 641 is meshedly connected to a corresponding set of transmission gears 350. Two sets of sliders 642 are symmetrically provided on both sides of the crescent tooth bar 641, and each set of sliders 642 is slidably connected in a corresponding set of slide grooves 360.

[0057] Exemplarily, a plurality of groups of second sleeves 650 are evenly distributed on the central inspection plate 610 and the side inspection plate 630, the number of the second sleeves 650 is the same as the number of the first sleeves 541, and each group of the second sleeves 650 coincides with the central axis of the corresponding group of the first sleeves 541. A group of retaining rings 651 are provided at the openings at the upper and lower ends of the second sleeves 650. A fixing rod 660 is provided inside the second sleeve 650, a third spring 661 is sleeved on the fixing rod 660, and a pressure ring 662 is installed on the fixing rod 660, and the pressure ring 662 and the third spring 661 are in conflict with each other. The retaining ring 651, the third spring 661 and the pressure ring 662 are combined to form a rod body reset component.

[0058] Exemplarily, one end of the fixing rod 660 extends into a corresponding set of first sleeves 541, and one end of the fixing rod 660 located in the first sleeve 541 movably extends into a corresponding set of through holes 540, and movably abuts against a corresponding set of abutment plates 551. One end of the fixing rod 660 away from the first sleeve 541 extends to the center of the elliptical structure, and a pressure head 670 is installed at the port.

[0059] Exemplarily, on both side walls of the center inspection plate 610, there are several groups of side grooves 680 arranged at equal intervals in the horizontal direction, the number of the side grooves 680 is the same as the pestle rod through holes 621, and each group of the side grooves 680 is provided with a group of second micro-electric cylinders 690, and a pestle rod 691 is installed on the output end of the second micro-electric cylinder 690, and the end of the pestle rod 691 away from the second micro-electric cylinder 690 is movably inserted into the corresponding group of pestle rod through holes 621, and is clamped on a group of side inspection plates 630 on the same side.

[0060] The brand model of the first micro electric cylinder 550 and the second micro electric cylinder 690 are both LUILEC-B32TL.

[0061] First, according to the detection requirements, select the part where pressure needs to be applied to the circuit board, then open a group of first micro-electric cylinders 550 corresponding to the part, and drive the abutment plate 551 to move to the opening of the perforation 540 through the first micro-electric cylinder 550, and then use the first electric push rod 400 to push the upper propulsion unit 500 and the lower propulsion unit to move relative to each other, and use the abutment plate 551 that has moved to the opening of the perforation 540 to push the corresponding group of fixed rods 660 and the pressure head 670 to move toward the circuit board until they contact the circuit board. The groups of fixed rods 660 corresponding to the groups of perforations 540 that have not opened the first micro-electric cylinder 550 will remain stationary, and the end away from the pressure head 670 will also penetrate into the perforation 540. In this way, the free adjustment of the pressure position and pressure amount of the circuit board is achieved. Then continue to apply pressure to the circuit board to detect its anti-fracture ability when facing pressure applied to both the upper and lower sides at the same time.

[0062] After the vertical fracture resistance test is completed, each group of second micro-electric cylinders 690 is controlled to drive each corresponding group of pestle rods 691 to disengage from a group of side inspection plates 630 on the same side, and then each group of pressure heads 670 is controlled to contact the circuit board, and then each group of second motors 340 is started, and the transmission gear 350 is driven to rotate by the second motor 340, and then the meshing connection between the transmission gear 350 and the crescent tooth bar 641 enables the pressure detection unit 600 as a whole to drive the corresponding part of the circuit board to twist, while realizing the vertical compression resistance test of the circuit board, and applying torque to the circuit board. And each group of pressure detection units 600 arranged at equal intervals can adjust the deflection angle separately, so that different parts of the circuit board can be subjected to torsion tests of different strengths and directions at the same time. At the same time, the two symmetrical groups of angle adjustment units 300 can make the circuit board freely switch between unidirectional and bidirectional torsion tests according to the rotation direction of the control transmission gear 350, and realize multi-part and multi-directional torsion detection under the condition of realizing vertical pressure. Not only enriches the functionality of the device, but also improves the accuracy of detection.

[0063] For example, Fig.12 As shown, a plurality of groups of pressure strips 671 are distributed in a circular array at one end of the pressure head 670 away from the fixing rod 660. The plurality of groups of pressure strips 671 extend radially from the central axis of the pressure head 670 to the surrounding areas, and each group of pressure strips 671 has a plurality of groups of serrated grooves 672 arranged at equal intervals.

[0064] Each group of pressure strips 671 is radially diffused from the central axis of the pressure head 670 to the surrounding areas, so that the additional pressure generated by the contact point between the pressure head 670 and the circuit board can be evenly distributed to the surrounding areas, avoiding additional damage to the circuit board beyond the vertical direction detection, thereby ensuring the accuracy of vertical detection. At the same time, by using each group of serrated grooves 672, the concave and convex parts of the surface of the circuit board can be included, so that the pressure strips 671 can be completely attached to the circuit board, thereby ensuring stability during detection.

[0065] The above embodiments have the following beneficial effects:

[0066] 1. After the pressure detection in the vertical direction is completed, the angle adjustment units 300 on both sides are started, so that the pressure detection unit 600 as a whole drives the corresponding parts of the circuit board to twist, thereby realizing the torsion test of the circuit board, so as to detect the anti-fracture ability of the circuit board when torque is caused. In addition, each group of pressure detection units 600 can adjust the deflection angle separately, so that different parts of the circuit board can be tested with different strengths and directions at the same time. In addition, the two symmetrical groups of angle adjustment units 300 can make the circuit board freely switch between unidirectional and bidirectional torsion tests, and realize multi-part and multi-directional torsion detection while realizing vertical pressure. Not only does it enrich the functionality of the device, but it also improves the accuracy of detection.

[0067] 2. The first micro-electric cylinder 550 drives the plate 551 to move to the opening of the through-hole 540, and then pushes the upper propulsion unit 500 and the lower propulsion unit to move relative to each other, and uses the plate 551 that has moved to the opening of the through-hole 540 to push the corresponding set of fixing rods 660 and the pressure head 670 to move toward the circuit board until they contact the circuit board. The sets of fixing rods 660 corresponding to the sets of through-holes 540 that have not opened the first micro-electric cylinder 550 will remain stationary, and the end away from the pressure head 670 will also penetrate into the through-hole 540. In this way, the free adjustment of the pressurized position and pressurized amount of the circuit board is realized, thereby improving the compatibility of the device.

[0068] 3. Turn on the two sets of first motors 210 at the same time, drive the two sets of conveyor belts 240 to move through the two sets of first motors 210, and then insert the edges of the two sides of the circuit board into the two sets of corresponding bayonet holes 260 on the two sets of conveyor belts 240, and use the two sets of conveyor belts 240 to transport the circuit board to each set of pressure detection units 600. Not only does it realize automatic loading, but it also does not affect the simultaneous detection of the upper and lower side walls of the circuit board, thereby improving the convenience of circuit board detection.

[0069] 4. Each group of pressure strips 671 is radially diffused from the central axis of the pressure head 670 to the surrounding areas, so that the additional pressure generated by the contact point between the pressure head 670 and the circuit board can be evenly distributed to the surrounding areas, avoiding additional damage to the circuit board beyond the vertical direction detection, thereby ensuring the accuracy of vertical detection. At the same time, by using each group of serrated grooves 672, the concave and convex parts on the surface of the circuit board can be included, so that the pressure strips 671 can be completely attached to the circuit board, thereby ensuring stability during detection.

[0070] Based on the above-mentioned PCB circuit board anti-fracture ability detection device, the embodiment of the present invention further proposes a detection method for the PCB circuit board anti-fracture ability detection device. Exemplarily, the detection method includes:

[0071] Two sets of conveying units are turned on at the same time, and the circuit boards are conveyed to each set of pressure detection units by using the two sets of conveying units;

[0072] According to the detection requirements, a part of the circuit board where pressure needs to be applied is selected, and then a group of first micro-electric cylinders corresponding to the part is turned on, and the first micro-electric cylinders drive the abutment plate to move to the perforation opening;

[0073] Start the two sets of first electric push rods, and use the two sets of first electric push rods to push the upper propulsion unit and the lower propulsion unit to move relative to each other;

[0074] The abutment plate that has moved to the perforated opening pushes a corresponding set of fixing rods and the pressure head to move toward the circuit board until they are fixed on the circuit board, thereby fixing the circuit board from both the upper and lower sides;

[0075] Specifically, each group of fixing rods corresponding to each group of through holes of the first micro-electric cylinder that is not opened will remain stationary, and the end thereof away from the pressure head will also penetrate into the through hole;

[0076] Control the two sets of first electric push rods so that the upper push unit and the lower push unit continuously apply pressure to the circuit board from both sides, thereby completing the anti-fracture detection of the circuit board in the vertical direction;

[0077] After the anti-fracture test in the vertical direction is completed, each group of second micro-electric cylinders is controlled to drive a corresponding group of pestles to separate from a group of side inspection plates on the same side;

[0078] Start the angle adjustment units on both sides so that the pressure detection unit as a whole drives the corresponding parts of the circuit board to twist;

[0079] After the two sets of angle adjustment units drive the two sets of crescent plates to deflect in the same direction, they then drive the two sets of crescent plates to deflect in opposite directions, thereby realizing free switching between unidirectional and bidirectional torsion tests on the circuit board.

[0080] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PCB circuit board fracture resistance detection device, comprising a plurality of groups of pressure detection units (600) arranged at equal intervals, characterized in that: The pressure detection unit (600) is symmetrically provided with an upper propulsion unit (500) and a lower propulsion unit; The pressure detection unit (600) comprises two groups of central inspection plates (610) symmetrically arranged in an upper and lower manner; two groups of second pleated cloth covers (620) are symmetrically arranged on both sides of the central inspection plate (610); a group of side inspection plates (630) are installed on the side of the two groups of the second pleated cloth covers (620) away from the central inspection plate (610); a group of crescent plates (640) with a fan-shaped cross-section in side view are arranged between the two groups of side inspection plates (630) symmetrically arranged in an upper and lower manner; one side of the two groups of the crescent plates (640) is connected to a group of angle adjustment units (300) in a transmission manner; the second A plurality of groups of second springs (622) are arranged at equal intervals in the pleated cloth sleeve (620), and a group of pestle rod through holes (621) are provided between two adjacent groups of the second springs (622); a plurality of groups of second sleeves (650) are evenly distributed on the middle inspection plate (610) and the side inspection plate (630); a fixing rod (660) is provided in the second sleeve (650), and both ends of the fixing rod (660) extend outside the second sleeve (650), one end of which is connected to the upper propulsion unit (500) or the lower propulsion unit, and the other end of which is provided with a pressure head (670); The angle adjustment unit (300) comprises a side column (310), an arc groove (320) is provided on a side wall of the side column (310) close to the central axis of the workbench (100), and the side cross-section of the arc groove (320) is a fan-shaped structure; a gear opening (330) is provided at the center of the arc groove (320), a second motor (340) is installed on a side wall of the side column (310), an output end of the second motor (340) extends into the side column (310) and is transmission-connected to a transmission gear (350), one side of the transmission gear (350) extends into the arc groove (320) through the gear opening (330), and is transmission-connected to a corresponding group of pressure detection units (600); two groups of slide grooves (360) are symmetrically provided on both sides of the gear opening (330).

2. A PCB circuit board fracture resistance detection device according to claim 1, characterized in that: The detection device further comprises two groups of horizontally arranged transmission units (200), the two groups of the transmission units (200) being symmetrically arranged with each other, the transmission units (200) comprising a first motor (210) and a first rotating rod (230), the first motor (210) and the first rotating rod (230) being symmetrically arranged at two ends of an array of a plurality of groups of angle adjustment units (300) on the same side; a group of pulleys (220) are both installed on the top of the first motor (210) and the first rotating rod (230), a transmission belt (240) is transmission-connected between the two groups of pulleys (220), and the transmission belt (240) passes through the center of the crescent plate (640) in a horizontal direction.

3. A PCB circuit board fracture resistance detection device according to claim 2, characterized in that: A plurality of groups of platforms (250) are arranged at equal intervals on the side wall of the conveyor belt (240), and a group of bayonet holes (260) are provided on a side wall of each group of platforms (250) away from the conveyor belt (240), and both ends of the bayonet holes (260) are open structures.

4. A PCB circuit board fracture resistance detection device according to claim 1, characterized in that: A crescent tooth bar (641) having a fan-shaped cross-section in side view is provided on the outer wall of the crescent plate (640), and the crescent tooth bar (641) is meshingly connected to a corresponding set of transmission gears (350); two sets of sliders (642) are symmetrically provided on both sides of the crescent tooth bar (641), and each set of sliders (642) is slidably connected in a corresponding set of slide grooves (360).

5. A PCB circuit board fracture resistance detection device according to claim 1, characterized in that: The upper propulsion unit (500) comprises a middle pressure plate (510), on which a first electric push rod (400) is provided; two groups of first pleated cloth sleeves (520) are symmetrically provided on both sides of the middle pressure plate (510), and a plurality of groups of first springs (521) are arranged at equal intervals in the first pleated cloth sleeves (520) along their own length direction; a group of side pressure plates (530) are installed on the side of the two groups of the first pleated cloth sleeves (520) away from the middle pressure plate (510), and a side wall of the side pressure plate (530) away from the middle pressure plate (510) is set as an arc angle (531).

6. A PCB circuit board fracture resistance detection device according to claim 5, characterized in that: A plurality of groups of through holes (540) are evenly distributed on the bottom of the middle pressure plate (510) and the side pressure plate (530), and the openings of the through holes (540) are connected to the first sleeves (541); the number of the first sleeves (541) is the same as the number of the second sleeves (650), and the central axis of each group of the second sleeves (650) coincides with the central axis of the corresponding group of the first sleeves (541); a first micro-electric cylinder (550) is installed on the inner wall of the through hole (540) away from the opening, and a stop plate (551) is installed on the output end of the first micro-electric cylinder (550), and the stop plate (551) is movably penetrated into the first sleeve (541) through the first micro-electric cylinder (550).

7. A PCB circuit board fracture resistance detection device according to claim 1, characterized in that: A group of retaining rings (651) are provided at the openings at both the upper and lower ends of the second sleeve (650); a third spring (661) is sleeved on a section of the fixed rod (660) located inside the second sleeve (650), and a pressure ring (662) is installed on the fixed rod (660); the pressure ring (662) and the third spring (661) are in contact with each other.

8. A PCB circuit board fracture resistance detection device according to claim 1, characterized in that: A plurality of groups of pressure strips (671) are arranged in a ring array at one end of the pressure head (670) away from the fixing rod (660), the plurality of groups of pressure strips (671) all extend radially from the central axis of the pressure head (670) to the surrounding areas, and each group of pressure strips (671) has a plurality of groups of sawtooth grooves (672) arranged at equal intervals.

9. A detection method for the PCB circuit board anti-fracture ability detection device according to any one of claims 1 to 8, characterized in that: The detection method comprises: Transporting the circuit board to each group of pressure detection units; Control the relative movement of the upper propulsion unit and the lower propulsion unit to fix the circuit board in both directions from the upper and lower sides; The upper propulsion unit and the lower propulsion unit are controlled to continuously apply pressure to the circuit board from both sides, so as to complete the anti-fracture test of the circuit board in the vertical direction; Start the angle adjustment units on both sides so that the pressure detection unit as a whole drives the corresponding parts of the circuit board to twist; After the two sets of angle adjustment units drive the two sets of crescent plates to deflect in the same direction, they then drive the two sets of crescent plates to deflect in opposite directions, thereby realizing free switching between unidirectional and bidirectional torsion tests on the circuit board.

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