A full-automatic PCB testing machine

Abstract

The application belongs to the technical field of PCB testing, and particularly relates to a full-automatic PCB testing machine, which comprises a testing machine main body and a mounting rack arranged on the testing machine main body, a detection mechanism and a positioning jig are arranged on the mounting rack, a servo motor is arranged on the positioning jig, and a fixing mechanism is arranged on the positioning jig; further comprising a reciprocating movement mechanism arranged on the positioning jig, the full-automatic PCB testing machine drives the cam to rotate through the servo motor, drives the reciprocating plate and the vertical rod to move, makes the extrusion plate expand laterally through linkage between the expansion rod group and the lifting rod group, makes the sliding plate rise and embed into a reserved hole of the PCB, realizes accurate fixing and position fine adjustment of the PCB, when the PCB has large deviation, the PCB deviation causes the sliding plate to be unable to normally embed into the reserved hole of the PCB, and the sliding plate will first lift the PCB upward. During the subsequent lowering of the detection seat, the pressure sensor triggers a signal feedback due to pressure, error detection is avoided, and the reliability of the detection result is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of PCB board testing, and in particular relates to a fully automatic testing machine for PCB boards. Background Art

[0002] The PCB fully automatic tester is a device used to perform comprehensive automated testing on printed circuit boards (PCBs). It can automatically complete the inspection of PCB boards for open circuits, short circuits, component welding quality, line defects, and other items through integrated electrical performance testing, optical testing, flying probe testing and other technical modules.

[0003] Current fully automatic PCB testers typically use vacuum suction cups to load the PCB. As the cups age, problems such as inconsistent suction force can occur, leading to misalignment during PCB handling. Furthermore, warped, uneven thickness, or irregular edges on the PCB can cause unbalanced suction force. This combination of factors can cause even a slight deviation from the preset position of the PCB to have a ripple effect on subsequent inspection steps. For example, precision test probes or optical inspection heads may be unable to accurately contact or capture test points on the PCB due to positional deviations, resulting in distorted test data or even missed detections. Therefore, a fully automatic PCB tester has been proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a fully automatic PCB testing machine that adjusts and positions the PCB through an extrusion plate and a slide plate in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A fully automatic PCB board testing machine includes a testing machine body and a mounting frame arranged on the testing machine body, the mounting frame is provided with a testing mechanism and a positioning fixture, the positioning fixture is provided with a servo motor, and the positioning fixture is provided with a fixing mechanism;

[0007] Also included are:

[0008] A reciprocating mechanism, wherein the reciprocating mechanism is provided on the positioning fixture, and the servo motor is connected to the reciprocating mechanism;

[0009] A vertical rod, wherein the vertical rod is slidably arranged on the fixing mechanism and is driven to reciprocate by the reciprocating mechanism;

[0010] An extrusion plate is provided with a slide plate for sliding movement, and the extrusion plate is symmetrically slidably provided on a fixing mechanism. An expansion rod group and a lifting rod group are provided between the vertical rod and the extrusion plate, and the extrusion plate is driven to move to both sides by the vertical rod.

[0011] As a further optimization scheme of the present invention, the fixing mechanism includes a sleeve, which is fixed on the positioning jig, and the internal thread of the sleeve is fixed with an embedded seat, a through groove is provided on the embedded seat, and the vertical rod is slidably set in the through groove, and sliding grooves are provided on both sides of the through groove, and the bottom end of the extrusion plate is slidably set in the sliding groove.

[0012] As a further optimization scheme of the present invention, the expansion rod group includes multiple connecting rods, each of which is rotatably arranged on both sides of the vertical rod, a horizontal axis is rotatably arranged on the vertical rod, one end of the connecting rod is rotatably arranged on the vertical rod through the horizontal axis, a synchronization shaft is rotatably arranged on the extrusion plate, and the synchronization shaft is fixedly arranged on the other end of the connecting rod.

[0013] As a further optimization scheme of the present invention, the lifting rod group includes a connecting rod 2 B, one end of which is fixedly set on one of the ends of the synchronous shaft, and the other end of the connecting rod 2 B is hinged to the connecting rod 2 A. A horizontal axis 2 is rotatably set on the slide, and the horizontal axis 2 is fixedly connected to one end of the connecting rod 2 A.

[0014] As a further optimization solution of the present invention, a bottom plate is provided on the main body of the detection machine, and a sliding rod is provided between the mounting frame and the bottom plate.

[0015] As a further optimization scheme of the present invention, the positioning fixture includes a fixing plate, which is fixedly set on the base plate, and a support column is set on the fixing plate. The fixing plate is provided with a positioning plate through the support column, and the positioning plate is provided with a plurality of through holes. The sleeve is threaded and fixed in the through hole, and the servo motor is fixed on the fixing plate. A cross bar is set at the output end of the servo motor, and the cross bar is rotatably set on the fixing plate.

[0016] As a further optimization scheme of the present invention, the reciprocating mechanism includes a reciprocating plate, which is fixed between adjacent vertical poles. A spring is sleeved on the vertical pole, and the two ends of the spring are respectively connected to the reciprocating plate and the positioning plate. A cam is fixed on the cross bar, and the cam abuts against the reciprocating plate.

[0017] As a further optimization scheme of the present invention, the detection mechanism includes a detection seat, a movable plate is slidably provided on the sliding rod, the detection seat is fixedly provided on the movable plate, a cylinder is provided on the mounting frame, the cylinder output end is fixedly connected to the movable plate, a groove is provided on the detection seat, the groove corresponds one-to-one to the position of the through hole, a pressure sensor is provided in the groove, and the pressure sensor protrudes from the surface of the detection seat.

[0018] As a further optimization solution of the present invention, an upper plate box and a lower plate box are respectively provided on both sides of the detection machine body, and the upper plate box and the lower plate box are connected to the detection machine body.

[0019] As a further optimization solution of the present invention, a picking suction cup and a lifting seat are slidably provided in the upper box and the lower box.

[0020] The beneficial effects of the present invention are:

[0021] 1. Different from the existing technology, in actual use, the servo motor drives the cam to rotate, driving the reciprocating plate and the vertical rod to move. Through the linkage between the expansion rod group and the lifting rod group, the extrusion plate expands laterally, and the slide rises and embeds into the reserved hole of the PCB board, realizing the precise fixation and position fine-tuning of the PCB board, greatly improving the accuracy and stability of the detection.

[0022] 2. Unlike existing technologies, in actual use, if the PCB is significantly offset, the slide will not fit properly into the reserved hole on the PCB. The slide will first push the PCB upward. Then, as the test base descends, the pressure sensor triggers a signal feedback due to the pressure, avoiding false detection and ensuring the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the mounting frame of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the detection seat of the present invention;

[0026] Figure 4 It is a schematic diagram of the positioning fixture structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the connection structure of the fixing mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the exploded structure of the fixing mechanism of the present invention;

[0029] Figure 7 This invention Figure 6 A in the middle is an enlarged structural diagram;

[0030] Figure 8 It is a schematic diagram of the cross-sectional structure of the sleeve and the inner seat of the present invention;

[0031] Figure 9 This invention Figure 8 Enlarged structural diagram at point B in the middle.

[0032] In the figure: 1, detection machine main body; 2, mounting frame; 21, bottom plate; 22, slide bar; 3, detection mechanism; 31, detection seat; 311, groove; 312, pressure sensor; 32, moving plate; 33, air cylinder; 4, positioning fixture; 41, fixed plate; 411, support column; 42, positioning plate; 421, through hole; 5, servo motor; 51, cross bar; 6, reciprocating moving mechanism; 61, reciprocating plate; 62, spring; 63, cam; 7, fixing mechanism; 71, sleeve; 72, embedded seat; 721, sliding groove; 722, through slot; 8, vertical rod; 9, extrusion plate; 91, sliding plate; 10, expansion rod group; 101, connecting rod one; 102, horizontal shaft one; 103, synchronous shaft; 11, lifting rod group; 111, connecting rod two A; 112, connecting rod two B; 113, horizontal shaft two; 12, upper plate box; 13, lower plate box; 14, pick-up suction cup; 15, lifting seat. DETAILED DESCRIPTION

[0033] The application will be described in further detail below with reference to the drawings. It is necessary to point out here that the following detailed description is only used to further illustrate the application and cannot be understood as limiting the scope of protection of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0034] Example 1: as Figure 1 - Figure 9As shown, a full-automatic PCB testing machine, comprising a testing machine body 1 and a mounting rack 2 arranged on the testing machine body 1, a controller arranged on the testing machine body 1, a bottom plate 21 arranged on the testing machine body 1, a slide rod 22 arranged between the mounting rack 2 and the bottom plate 21, a detection mechanism 3 and a positioning jig 4 arranged on the mounting rack 2, an upper plate box 12 and a lower plate box 13 arranged on both sides of the testing machine body 1, the upper plate box 12 and the lower plate box 13 being in communication with the testing machine body 1, a pickup suction cup 14 and a lifting seat 15 arranged in the upper plate box 12 and the lower plate box 13, the pickup suction cup 14 being slidably installed in the upper plate box 12 and the lower plate box 13 through an electric slide rail, a servo motor 5 arranged on the positioning jig 4, a fixing mechanism 7 arranged on the positioning jig 4, a reciprocating moving mechanism 6 arranged on the positioning jig 4, the servo motor 5 being connected with the reciprocating moving mechanism 6, a vertical rod 8 being slidably arranged on the fixing mechanism 7, the vertical rod 8 being driven to move reciprocally by the reciprocating moving mechanism 6, an extrusion plate 9 being symmetrically slidably arranged on the fixing mechanism 7, a sliding plate 91 being slidably arranged on the extrusion plate 9, an expansion rod group 10 and a lifting rod group 11 being arranged between the vertical rod 8 and the extrusion plate 9, the extrusion plate 9 being driven to move to both sides by the vertical rod 8, so that the sliding plate 91 is lifted to pass through the PCB and be fixed, the equipment frame being built up by the testing machine body 1, the mounting rack 2 and other basic structures, the slide rod 22 ensuring the stability of the movement of the components on the mounting rack 2, the pickup suction cup 14 in the upper plate box 12 and the lower plate box 13 being displaced through the electric slide rail, cooperating with the height adjustment of the lifting seat 15 to realize the placing and taking of the PCB on the lifting seat 15, the automatic feeding and discharging of the PCB (this is the prior art, but more elaboration), the positioning jig 4, the servo motor 5, the fixing mechanism 7 and other structures providing power and support for the accurate fixing and detection of the PCB.

[0035] As shown, Figure 5 - Figure 6 As shown, the fixing mechanism 7 comprises a sleeve 71 fixedly arranged on the positioning jig 4, an embedded seat 72 threadedly fixed in the sleeve 71, a through slot 722 being formed in the embedded seat 72, the vertical rod 8 being slidably arranged in the through slot 722, slide grooves 721 being formed on both sides of the through slot 722, the extrusion plate 9 being slidably arranged at the bottom end of the slide grooves 721, the threaded connection between the sleeve 71 and the embedded seat 72 in the fixing mechanism 7 being convenient for disassembly and maintenance, the through slot 722 and the slide grooves 721 providing accurate sliding tracks for the vertical rod 8 and the extrusion plate 9, ensuring the stability and accuracy of the reciprocating movement of the vertical rod 8 and the transverse expansion of the extrusion plate 9, so that the fixing mechanism 7 can complete the fixing work of the PCB in cooperation with other components, improving the accuracy and reliability of the fixing of the PCB.

[0036] As shown, Figure 7As shown, the expansion rod group 10 includes multiple connecting rods 101, which are rotatably set on both sides of the vertical rod 8, and a horizontal axis 102 is rotatably set on the vertical rod 8. One end of the connecting rod 101 is rotatably set on the vertical rod 8 through the horizontal axis 102, and a synchronization shaft 103 is rotatably set on the extrusion plate 9. The synchronization shaft 103 is fixedly set at the other end of the connecting rod 101. The expansion rod group 10 utilizes the rotational connection of the connecting rod 101, the horizontal axis 102 and the synchronization shaft 103 to efficiently convert the linear motion of the vertical rod 8 into the lateral expansion motion of the extrusion plate 9. This mechanical transmission structure is simple and reliable, with high transmission efficiency, and can achieve a larger expansion stroke in a smaller space. The setting of multiple connecting rods 101 enhances the stability and reliability of the transmission, ensuring the smooth expansion of the extrusion plate 9.

[0037] like Figure 7 As shown, the lifting rod group 11 includes a second connecting rod B112, one end of which is fixedly set at the end of the synchronous shaft 103, and the other end of the second connecting rod B112 is hinged with a second connecting rod A111. A second horizontal axis 113 is rotatably set on the slide 91, and the second horizontal axis 113 is fixedly connected to one end of the second connecting rod A111. The lifting rod group 11 is connected by the hinge and rotation of the second connecting rod B112, the second connecting rod A111 and the second horizontal axis 113, so that the rotation of the synchronous shaft 103 when the extrusion plate 9 expands is converted into the rising movement of the slide 91, so that the slide 91 is embedded in the reserved hole of the PCB board, the PCB board is fine-tuned and fixed, and the accuracy and stability of the PCB board fixation are further improved.

[0038] like Figure 4 As shown, the positioning fixture 4 includes a fixing plate 41, which is fixedly set on the base plate 21, and a support column 411 is set on the fixing plate 41. The fixing plate 41 is provided with a positioning plate 42 through the support column 411. The positioning plate 42 is provided with a plurality of through holes 421, and the sleeve 71 is threadedly fixed in the through hole 421. The servo motor 5 is fixed on the fixing plate 41, and a cross bar 51 is set at the output end of the servo motor 5. The cross bar 51 is rotatably set on the fixing plate 41. The fixing plate 41 and the support column 411 in the positioning fixture 4 provide installation space for components such as the positioning plate 42 and the servo motor 5. The through hole 421 on the positioning plate 42 provides positioning for the installation of the fixing mechanism 7. The servo motor 5 is connected to the reciprocating moving mechanism 6 through the cross bar 51, which can accurately control the power output and ensure the stability and efficiency of the entire test process.

[0039] like Figure 4As shown, the reciprocating mechanism 6 includes a reciprocating plate 61, which is fixedly arranged between adjacent vertical rods 8. A spring 62 is sleeved on the vertical rod 8. The two ends of the spring 62 are respectively connected to the reciprocating plate 61 and the positioning plate 42. A cam 63 is fixedly arranged on the cross bar 51, and the cam 63 abuts against the reciprocating plate 61. The reciprocating mechanism 6 utilizes the abutment between the cam 63 and the reciprocating plate 61 to convert the rotational motion of the cross bar 51 into the reciprocating linear motion of the reciprocating plate 61 and the vertical rod 8. The spring 62 is set to provide a reset force for the vertical rod 8, thereby ensuring the normal operation of the fixing mechanism 7 and other components and improving the stability and reliability of the equipment operation.

[0040] like Figure 2 - Figure 3 As shown, the detection mechanism 3 includes a detection seat 31, a movable plate 32 is slidably provided on the slide bar 22, the detection seat 31 is fixedly provided on the movable plate 32, a cylinder 33 is provided on the mounting frame 2, the output end of the cylinder 33 is fixedly connected to the movable plate 32, a groove 311 is provided on the detection seat 31, the groove 311 corresponds to the position of the through hole 421, a pressure sensor 312 is provided in the groove 311, the pressure sensor 312 is electrically connected to the controller in the detection machine body 1, the pressure sensor 312 protrudes from the surface of the detection seat 31, and the cylinder 33 in the detection mechanism 3 passes through the movable plate 32 drives the detection seat 31 to rise and fall precisely along the slide bar 22, ensuring that the detection seat 31 accurately reaches the detection position. The groove 311 provides an accommodating space for the slide plate 91. The corresponding setting of the groove 311 and the through hole 421 ensures that the pressure sensor 312 can be embedded in the through hole 421, thereby avoiding the triggering of the pressure sensor 312. The design of the pressure sensor 312 protruding from the surface of the detection seat 31 enables it to trigger a signal when the PCB board is not fixed. This effectively avoids false detection, improves the accuracy and reliability of the detection results, and ensures stable operation of the equipment.

[0041] It should be noted that during the loading stage, the electric slide rail drives the picking suction cup 14 in the upper plate box 12 to move back and forth between the upper plate box 12 and the detection machine body 1, thereby adsorbing the PCB board to be inspected on the lifting seat 15 and transferring it to the top of the positioning plate 42 to complete the initial placement.

[0042] Entering the fixed stage, after the servo motor 5 is activated, the crossbar 51 at its output drives the cam 63 to begin rotating. When the raised portion of the cam 63 contacts the reciprocating plate 61, it pushes the reciprocating plate 61 upward. Because the reciprocating plate 61 is fixed between adjacent vertical rods 8, the vertical rods 8 rise synchronously, compressing the spring 62 mounted thereon. The vertical rods 8 slide along the through slots 722 of the internal seat 72. As the vertical rods 8 rise, the connecting rods 101, which are pivotally mounted on either side of the vertical rods 8, rotate about the horizontal axis 102. The rotation of the connecting rods 101 drives the synchronous shaft 103, causing the extrusion plate 9 to slide outward along the grooves 721 on either side of the internal seat 72, achieving lateral expansion.

[0043] During this process, the second connecting rod B112, fixed at each end of the synchronization shaft 103, deflects due to the rotation of the synchronization shaft 103. The second connecting rod B112 is hingedly connected to the second connecting rod A111. The deflection of the second connecting rod B112 drives the second connecting rod A111, which in turn drives the slide plate 91 to slide upward along the extrusion plate 9. Once the slide plate 91 is inserted into the reserved hole for the PCB, the force generated by the expansion of the slide plate 91 is used to fine-tune the position of the PCB, ensuring it is in the precise detection position.

[0044] During the inspection phase, the cylinder 33 on the mounting bracket 2 is activated, and its output pushes the movable plate 32 downward along the slide bar 22. The movable plate 32 lowers the inspection base 31 affixed thereto. The groove 311 on the inspection base 31 aligns with the through-hole 421 on the positioning plate 42, and the pressure sensor 312 within the groove 311 gradually approaches the PCB. If the slide 91 is successfully inserted into the pre-set hole, the PCB is positioned securely, and the pressure sensor 312 is embedded in the through-hole 421 without compression, allowing for various performance tests. If the slide 91 is not inserted into the pre-set hole, during the descent of the inspection base 31, the pressure sensor 312 protruding from the surface of the inspection base 31 will excessively press on the unsecured PCB, triggering a signal to alert the operator that the PCB is not properly secured, allowing for prompt action. After the inspection is complete, the servo motor 5 reverses, the cam 63 drives the reciprocating plate 61 downward, the spring 62 resets, and the compression plate 9 and slide 91 retract, completing a single inspection cycle. After the inspection is completed, the PCB board is sucked away by the pickup suction cup 14 in the lower board box 13; and sorting is performed according to the inspection results.

[0045] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A fully automatic PCB board testing machine, comprising a testing machine body (1) and a mounting frame (2) arranged on the testing machine body (1), wherein a testing mechanism (3) and a positioning fixture (4) are arranged on the mounting frame (2), and characterized in that: The positioning jig (4) is provided with a servo motor (5), and the positioning jig (4) is provided with a fixing mechanism (7); Also included are: A reciprocating mechanism (6), the reciprocating mechanism (6) being arranged on the positioning fixture (4), and the servo motor (5) being connected to the reciprocating mechanism (6); A vertical rod (8), wherein the vertical rod (8) is slidably arranged on the fixing mechanism (7), and the vertical rod (8) is driven to reciprocate by the reciprocating mechanism (6); An extrusion plate (9), a slide plate (91) is slidably provided on the extrusion plate (9), the extrusion plate (9) is symmetrically slidably provided on the fixing mechanism (7), an expansion rod group (10) and a lifting rod group (11) are provided between the vertical rod (8) and the extrusion plate (9), and the extrusion plate (9) is driven to move to both sides by the vertical rod (8); The fixing mechanism (7) includes a sleeve (71), the sleeve (71) is fixedly arranged on the positioning fixture (4), the sleeve (71) is fixedly provided with an internal threaded seat (72), the internal seat (72) is provided with a through groove (722), the vertical rod (8) is slidably arranged in the through groove (722), the through groove (722) is provided with sliding grooves (721) on both sides, and the bottom end of the extrusion plate (9) is slidably arranged in the sliding groove (721); The expansion rod group (10) includes a plurality of connecting rods (101), the connecting rods (101) are rotatably arranged on both sides of the vertical rod (8), a horizontal axis (102) is rotatably arranged on the vertical rod (8), one end of the connecting rod (101) is rotatably arranged on the vertical rod (8) through the horizontal axis (102), a synchronous shaft (103) is rotatably arranged on the extrusion plate (9), and the synchronous shaft (103) is fixedly arranged on the other end of the connecting rod (101); The lifting rod group (11) includes a second connecting rod B (112), one end of which is fixedly arranged at the end of one of the synchronous shafts (103), and the other end of which is hinged to a second connecting rod A (111). A second horizontal axis (113) is rotatably arranged on the slide (91), and the second horizontal axis (113) is fixedly connected to one end of the second connecting rod A (111).

2. The fully automatic PCB testing machine according to claim 1, characterized in that: A bottom plate (21) is provided on the detection machine body (1), and a sliding rod (22) is provided between the mounting frame (2) and the bottom plate (21).

3. The fully automatic PCB testing machine according to claim 2, characterized in that: The positioning fixture (4) includes a fixing plate (41), the fixing plate (41) is fixedly arranged on the bottom plate (21), the fixing plate (41) is provided with a support column (411), the fixing plate (41) is provided with a positioning plate (42) through the support column (411), the positioning plate (42) is provided with a plurality of through holes (421), the sleeve (71) is threadedly fixed in the through holes (421), the servo motor (5) is fixedly arranged on the fixing plate (41), and a cross bar (51) is provided at the output end of the servo motor (5), and the cross bar (51) is rotatably arranged on the fixing plate (41).

4. The fully automatic PCB testing machine according to claim 3, characterized in that: The reciprocating mechanism (6) includes a reciprocating plate (61), the reciprocating plate (61) is fixedly arranged between adjacent vertical rods (8), a spring (62) is sleeved on the vertical rod (8), and two ends of the spring (62) are respectively connected to the reciprocating plate (61) and the positioning plate (42), and a cam (63) is fixedly arranged on the cross bar (51), and the cam (63) abuts against the reciprocating plate (61).

5. The fully automatic PCB testing machine according to claim 3, characterized in that: The detection mechanism (3) includes a detection seat (31), a movable plate (32) is slidably provided on the slide rod (22), the detection seat (31) is fixedly provided on the movable plate (32), a cylinder (33) is provided on the mounting frame (2), an output end of the cylinder (33) is fixedly connected to the movable plate (32), a groove (311) is provided on the detection seat (31), the position of the groove (311) corresponds to the position of the through hole (421), a pressure sensor (312) is provided in the groove (311), and the pressure sensor (312) protrudes from the surface of the detection seat (31).

6. The fully automatic PCB testing machine according to claim 1, characterized in that: An upper plate box (12) and a lower plate box (13) are respectively provided on both sides of the detection machine body (1); the upper plate box (12) and the lower plate box (13) are in communication with the detection machine body (1).

7. The fully automatic PCB testing machine according to claim 6, characterized in that: A picking suction cup (14) and a lifting seat (15) are slidably provided in the upper plate box (12) and the lower plate box (13).

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