WO2020258467A1

WO2020258467A1 - Test machine

Info

Publication number: WO2020258467A1
Application number: PCT/CN2019/101389
Authority: WO
Inventors: 黄韬
Original assignee: 南京泊纳莱电子科技有限公司
Priority date: 2019-06-26
Filing date: 2019-08-19
Publication date: 2020-12-30
Also published as: CN112141667A

Abstract

A test machine, comprising: a base frame; a conveying mechanism driven by an external power to transport a workpiece to be tested, the conveying mechanism comprising a power transmission unit and upper and lower conveyor belt units; a testing channel; and a testing mechanism passing through the testing channel to perform visual testing on two sides of said workpiece. The power transmission unit comprises same-side and different-side transmission units and a reversing assembly, the same-side transmission unit is in transmission connection with the conveyor belt units located on the same side of said workpiece, and the different-side transmission unit is in transmission connection with the conveyor belt units located on different sides of said workpiece; and the reversing assembly is provided on any one of the conveyor belt units, and the reversing assembly is in transmission connection with the conveyor belt unit and the different-side transmission unit. By configuring a plurality of conveyor belt units to be driven by the same external power and by using the reversing assembly to achieve the same transport direction of the upper conveyor belt units and the lower conveyor belt units, the workpiece to be tested is ensured to be intact during transport.

Description

A test machine

Technical field

This application relates to the field of testing technology, and specifically to a testing machine.

Background technique

PCB board, also known as printed circuit board, its design is mainly layout design. The main advantage of using circuit boards is to greatly reduce wiring and assembly errors, and increase the level of automation and production labor rate. With the development of social science and technology, PCB boards are used more and more widely, and the requirements for PCB boards are getting higher and higher. In order to obtain PCB boards with good performance, conveyor belts are needed to transport them during the PCB board production process. Detection.

When inspecting both sides of the PCB board, the prior art discloses a device for conveying and inspecting the PCB board. The upper transmission belt, the left transmission belt, the right transmission belt and the detection structure are arranged, among which the left transmission belt and the right transmission belt Horizontally, the upper transmission belt is arranged above the left and right transmission belts. When the PCB board is located on the right transmission belt, the detection structure detects the upper surface of the PCB board; when the PCB board is located on the left transmission belt, another detection structure detects the bottom of the PCB board, thereby realizing double-sided detection of the PCB board. Usually the left and right belts are driven by the same first motor, and the upper belt is driven by another first motor. Since the transmission belt is driven by different driving parts, there is a problem that the PCB board is easily damaged due to unsynchronized transmission of the transmission belt.

Summary of the invention

Therefore, the technical problem to be solved by the present application is to overcome the defect that the transmission belts stacked one above the other in the prior art are driven by different driving parts, and the transmission is not synchronized and the PCB board is damaged, thereby providing a testing machine.

A testing machine includes: a base frame; and also includes:

The conveying mechanism, which is driven by external power to transmit the workpiece to be inspected, includes a power transmission unit and a plurality of upper and lower conveyor belt units located on both sides of the workpiece to be inspected, and the power transmission between each of the conveyor belt units Unit drive connection;

The detection channel includes an upper detection channel formed at the end of any one of the upper conveyor belt units, and a lower detection channel formed at the end of any one of the lower conveyor belt units;

And a detection mechanism, including an upper detection unit and a lower detection unit respectively corresponding to the upper detection channel and the lower detection channel, the detection unit passes through the detection channel to visualize both sides of the workpiece to be detected Detection

The power transmission unit includes a same-side transmission unit, a different-side transmission unit, and a reversing assembly. The same-side transmission unit is drivingly connected to each conveyor belt unit located on the same side of the workpiece to be detected, and the different-side transmission unit is drivingly connected Conveyor belt units located on different sides of the workpiece to be inspected; the reversing assembly is arranged on any one of the conveying belt units, and the reversing assembly is drivingly connected to the conveyor belt unit and the opposite-side transmission unit.

Further, it further includes a conveying anti-warping mechanism provided on the base frame, the conveying anti-warping mechanism includes an adjusting pressure component and a warpage detecting component, and the adjusting pressure component has a first working state and a first working state. In the second working state, in the first working state, the adjusting pressure component applies a flattening force to the workpiece to be inspected; in the second working state, the adjusting pressure component is subjected to the to-be-detected workpiece The action of the workpiece triggers the warpage detection part.

Further, the adjusting and pressing component includes a pressure plate and a trigger rod fixedly connected to the pressure plate, the pressure plate is floatingly arranged on the base frame, and the trigger rod is driven by the pressure plate toward a direction approaching the warpage detection member movement;

The warpage detecting member is a photoelectric sensor, and the photoelectric sensor is triggered after the trigger rod rises to a predetermined position.

Further, the height of the photoelectric sensor can be adjusted.

Further, it also includes a correction mechanism, which includes a correction adjustment assembly and a pressing assembly. The correction adjustment assembly is movably arranged on the base frame, the pressing assembly is connected to the correction adjustment assembly, and the correction adjustment assembly Adjusting the tension of the pressing component acting on the conveyor belt of the conveyor belt unit.

Further, the correction adjustment assembly includes a correction adjustment action member and a correction adjustment connection assembly, the correction adjustment action member acts on the correction adjustment connection assembly, and the correction adjustment connection assembly is connected to the pressing assembly.

Further, the correction and adjustment connection assembly includes an installation connection block and a first connection post, the installation connection block is provided with a strip hole, the strip hole is connected to the base frame by a fastener, and the second A connecting column is fixed on the installation connecting block and connected to the pressing assembly.

Further, the pressing assembly includes a pressing roller, the axis of the pressing roller is arranged perpendicular to the conveying direction of the conveyor belt unit, and the pressing roller has an axial inner end that extends above the conveyor belt, and Exposed at the axially outer end of the conveyor belt, the axially inner end is set higher than the axially outer end, the axially inner end is connected to the base frame, and the axially outer The end is connected to the first connecting column.

Further, the same-side transmission unit and the opposite-side transmission unit are both pulley transmission components; the reversing unit includes a pair of gears that mesh with each other, one of the gears and the belt of the opposite-side transmission unit The wheels are arranged coaxially, and the other gear is arranged coaxially with the conveying shaft of the upper conveyor belt unit.

Further, the base frame includes a fixed base frame and a movable base frame, the upper conveyor belt unit is arranged on the movable base frame, a first drive unit, a second drive unit, the lower conveyor belt unit, and the The detection mechanisms are all arranged on the fixed base frame, wherein the first drive unit drives the movable base frame to move, and the second drive unit drives the detection mechanism to move.

The technical solution of this application has the following advantages:

1. A testing machine provided by the present application includes: a base frame; and also includes: a conveying mechanism arranged on the base frame, which is driven by external power to transmit the workpiece to be inspected, includes a power transmission unit and the workpiece There are several upper conveyor belt units and lower conveyor belt units on both sides, and each of the conveyor belt units is connected by the power transmission unit; the detection channel includes an upper conveyor belt formed at the end of any one of the upper conveyor belt units. A detection channel, and a lower detection channel formed at the end of any one of the lower conveyor belt units; and a detection mechanism, including an upper detection unit and a lower detection unit respectively corresponding to the upper detection channel and the lower detection channel, The detection unit passes through the detection channel to perform visual inspection on both sides of the workpiece to be detected; the power transmission unit includes a same-side transmission unit, a different-side transmission unit and a reversing assembly, and the same-side transmission unit transmits The conveyor belt units located on the same side of the workpiece to be inspected are connected, and the different-side transmission unit drives and connects the conveyor belt units located on different sides of the workpiece to be inspected; the reversing assembly is arranged on any one of the conveyor belts On the unit, the reversing assembly drivingly connects the conveyor belt unit and the opposite-side driving unit. A testing machine with this structure, by setting multiple conveyor belt units driven by the same external power and realizing the same transmission direction of the upper conveyor belt unit and the lower conveyor belt unit through the reversing assembly, thereby realizing the upper conveyor belt unit and the lower conveyor belt Synchronous conveying of the unit to ensure the integrity of the workpiece to be inspected during the conveying process.

2. A testing machine provided by the present application, further comprising a conveying anti-warping mechanism provided on the base frame, the conveying anti-warping mechanism includes an adjusting pressure component and a warpage detecting member, the adjusting pressure The component has a first working state and a second working state. In the first working state, the adjusting pressure component applies a flattening force to the workpiece to be detected; in the second working state, the adjusting The pressing component is acted on by the workpiece to be detected to trigger the warpage detection component. A testing machine of this structure is provided with an adjusting pressure component and a warpage detection component. When the degree of warpage of the workpiece to be tested is small and not enough to make the adjustment pressure component move, the adjustment pressure component acts on the component to be tested The workpiece is in the first working state by flattening the workpiece to be inspected, and when the degree of warpage of the workpiece to be inspected is too large and sufficient to make the adjustment pressure component move, the workpiece to be inspected acts on the adjustment pressure component to cause its movement to trigger warping The test piece is in the second working state, and then a method of manually flattening the test piece to avoid the situation that the test piece is damaged due to instantaneous force.

3. In the testing machine provided by this application, the height of the photoelectric sensor can be adjusted. A testing machine with this structure can adjust the height of the photoelectric sensor according to the thickness of the workpiece to be inspected, so as to realize anti-warping treatment for different kinds of workpieces to be inspected.

4. A testing machine provided by the present application further includes a correction mechanism, which includes a correction adjustment assembly and a compression assembly, the correction adjustment assembly is movably arranged on the base frame, the compression assembly and the correction adjustment The components are connected, and the correction adjusting component adjusts the tension of the pressing component acting on the conveyor belt of the conveyor belt unit. A testing machine of this structure is provided with a correction mechanism, in which the compression component acts on the loose side of the conveyor belt to compress, so that the loose side of the conveyor belt obtains greater tension due to the action of the compression component than the other Side tension, because the conveyor belt will move from the position of high tension to the position of low tension, the loose side of the conveyor belt will move towards the other side, thus realizing the correction of the conveyor belt.

5. The testing machine provided by the present application, the pressing assembly includes a pressing roller, the axis of the pressing roller is arranged perpendicular to the conveying direction of the conveyor belt unit, and the pressing roller The upper axial inner end and the axial outer end exposed to the conveyor belt, the axial inner end is set higher than the axial outer end, and the axial inner end is connected to the For the base frame, the axially outer end is connected to the first connecting column. A testing machine with this structure, by setting the axial inner end of the pressing roller higher than the axial outer end of the pressing roller, so that when the pressing assembly compresses the conveyor belt, the conveyor belt is applied to the other side The force of the conveyor belt prevents the loose side of the conveyor belt from continuing to shift.

6. A testing machine provided by this application, the base frame includes a fixed base frame and a movable base frame, the upper conveyor belt unit is arranged on the movable base frame, a first drive unit, a second drive unit, and a The conveyor belt unit and the detection mechanism described below are both arranged on the fixed base frame, wherein the first drive unit drives the movable base frame to move, and the second drive unit drives the detection mechanism to move. A testing machine of this structure is provided with a first drive unit to adjust the first distance between the upper conveyor belt unit and the lower conveyor belt unit and a second drive unit to adjust the first distance between the detection mechanism and the lower conveyor belt unit. Two distances, so that the first distance and the second distance are both adapted to the thickness of the workpiece to be inspected, so as to realize the conveying and inspection of different kinds of workpieces to be inspected.

Description of the drawings

In order to more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a schematic structural diagram of a testing machine provided in an embodiment of the application;

Fig. 2 is a partial structural diagram of the conveying mechanism shown in Fig. 1 without showing part of the base frame;

Fig. 3 is a schematic structural diagram of the conveying mechanism shown in Fig. 1 without showing part of the base frame and rotating horizontally;

4 is a schematic diagram of the structure of the transmission unit on the opposite side shown in FIG. 2;

Figure 5 is a partial enlarged view of the transmission unit on the same side shown in Figure 3 (the picture has been rotated 90° to the right);

Figure 6 is a schematic structural view of the conveying anti-warping mechanism shown in Figure 2;

Fig. 7 is a schematic diagram of the structure of the correction mechanism shown in Fig. 2;

Figure 8 is a partial enlarged view of the correction mechanism shown in Figure 7;

Description of reference signs:

111-Upper light source assembly, 112-Upper visual inspection assembly, 121-Lower light source assembly, 122-Lower visual inspection assembly, 13-Second motor;

2-PCB board;

31-horizontal fixed base frame, 311-third mounting plate, 312-arc hole, 313-first chute, 32-vertical fixed base frame, 33-movable base frame, 331-fourth mounting plate, 3311 Second chute

41-first motor, 42-first connecting unit, 421-screw, 422-first connecting plate, 423-first mounting plate, 424-adjusting connecting column, 425-load-bearing connecting column, 426-T type connecting piece , 431-second mounting plate, 432-guide shaft, 433-first linear bearing, 434-slider, 435-mounting base;

511-upper conveyor belt, 512-upper main conveyor shaft, 521-first lower conveyor belt, 522-first lower main conveyor shaft, 531-second lower conveyor belt, 532-second lower main conveyor shaft, 541-th Three lower conveyor belts, 542-third lower main conveyor shaft;

61- the third motor, 62- the fourth pulley;

711-first pulley transmission assembly, 7111-first pulley, 7112-first transmission belt, 712-second pulley transmission assembly, 7121-second transmission belt, 7122-second pulley, 7123-first guide wheel , 721-third belt wheel transmission assembly, 7211-third transmission belt, 7212-second guide wheel, 7213-connecting shaft, 7214-third belt wheel;

81-first gear, 82-second gear;

91-first tensioning component, 911-first tensioning wheel, 912-first tensioning connecting piece, 913-first limiting piece, 92-second tensioning component, 921-second tensioning wheel, 922 -Second tensioning connecting piece, 9221-second strip hole, 923-Second limiting piece, 93-third tensioning assembly, 931-third tensioning wheel, 9321-connecting part, 93211-third -Shaped hole, 9322-limiting part, 941-fourth tensioning wheel, 942-fourth tension connecting piece, 9421-fourth strip-shaped hole, 943-fourth limiting piece;

10- Negative pressure pump;

131-photoelectric sensor, 1311-boss;

1411-first vertical end arm, 1412-second horizontal end arm, 1413-third horizontal end arm, 1421-second vertical end arm, 1422-first horizontal end arm, 14221-first through hole, 143 -Abutment;

15-L type pressure plate,

161-trigger rod, 162-first linear bearing, 163-first circlip, 164-second circlip, 165-first connecting block;

171-pressure roller, 172-pressure roller shaft, 1721-axial outer end, 1722-axial inner end;

181-first screw, 182-fixing plate;

19-Install the connecting block, 191-the sixth strip hole, 192-the first connecting post;

20-The second connecting column.

Detailed ways

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of this application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be interpreted broadly unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood under specific circumstances.

In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

Example

A testing machine as shown in Figures 1 to 8 includes a base frame, and a conveying mechanism, a detection channel, a detection mechanism, a conveying anti-warping mechanism, and a correction mechanism arranged on the base frame.

The conveying mechanism is driven by external power to transmit the workpiece to be inspected, which specifically includes a power transmission unit, a number of upper and lower conveyor belt units located on both sides of the workpiece to be inspected, a suction unit and a tensioning assembly, and power is passed between each conveyor belt unit The transmission unit is in transmission connection, wherein the conveyor belt unit includes a conveyor shaft and a conveyor belt arranged on the conveyor shaft.

The detection channel includes an upper detection channel formed at the end of any upper conveyor belt unit and a lower detection channel formed at the end of any lower conveyor belt unit; the detection mechanism includes an upper detection channel respectively corresponding to the upper detection channel and the lower detection channel. Unit and the lower detection unit, the detection unit passes through the detection channel to perform visual inspection on both sides of the workpiece to be detected.

The conveying anti-warping mechanism is used to flatten the workpiece to be inspected with a small degree of warpage, or to send out indication information such as an alarm sound for the workpiece to be inspected with a large degree of warpage to instruct the operator to manually flatten; The correction mechanism is used to correct the deviation of the conveyor belt. The workpiece to be inspected may be PCB board 2 or other workpieces to be inspected.

By setting multiple conveyor belt units driven by the same external power and using the reversing assembly to achieve the same transmission direction of the upper conveyor belt unit and the lower conveyor belt unit, the synchronous conveying of the upper conveyor belt unit and the lower conveyor belt unit is realized to ensure the The PCB board 2 is intact during transmission.

Specifically referring to Figure 2, the upper conveyor belt unit is stacked on the lower conveyor belt unit and can move closer to or away from the lower conveyor unit; the power transmission unit directly or indirectly connects the conveyor shaft and the external power, specifically including the same side transmission unit , Opposite-side transmission unit and reversing assembly, the same-side transmission unit drives and connects the conveyor shafts between the conveyor belt units on the same side of the PCB board 2, and the opposite-side transmission unit drives and connects one of the conveyor belt units on different sides of the PCB board 2. The reversing component is located on any of the conveyor belt units, and the reversing component transmission connects the conveyor belt unit and the opposite side transmission unit to ensure that the conveyor belt unit on the opposite side of the PCB board 2 conveys the PCB board 2 The transmission direction is the same; the suction unit is used to suck the PCB board 2; the tensioning component tensions the transmission belts of the transmission unit on the same side and the transmission unit on the opposite side. The transmission unit on the same side and the transmission unit on the opposite side in this embodiment are both pulley transmission components. Specifically, the pulley transmission component includes a pulley fixed on a shaft and a transmission belt connecting multiple pulleys.

The conveying shaft of each conveyor belt unit includes a main conveying shaft and a slave conveying shaft fixed on the base frame. The conveying belt is sleeved on the main conveying shaft and the slave conveying shaft. The main conveying shaft passes through the same side transmission unit or the opposite side The transmission unit is directly or indirectly connected to external power to realize the transmission of each transmission belt. It should be noted that at least the upper conveyor belt unit is provided with a suction unit for absorbing the PCB board 2, and the lower conveyor belt unit may or may not be provided with a suction unit, wherein the suction unit may be set to include a negative pressure provided on the surface of the conveyor belt Hole and a negative pressure pump 10 connected with the negative pressure hole. The negative pressure pump 10 sucks air to provide suction to absorb the PCB board 2 on the conveyor belt.

As shown in FIG. 1, the base frame in this embodiment includes a fixed base frame and a movable base frame 33, wherein the fixed base frame includes a horizontal fixed base frame 31 and a vertical fixed base frame 32. The vertical fixed base frame 32 is vertically arranged on the side where the horizontal fixed base frame 31 is provided with the upper conveyor belt unit; the movable base frame 33 is connected to the first drive connection unit provided on the vertical fixed base frame 32, and the first drive connection The unit driving movable base frame 33 can move closer to or away from the horizontal fixed base frame 31. In this embodiment, the upper conveyor belt unit is arranged on the movable base frame 33 and the lower conveyor belt unit is arranged on the horizontal fixed base frame 31.

Referring to FIG. 2, the first driving connection unit in this embodiment includes a first driving unit, a first connection unit 42 and an auxiliary connection unit. The first driving unit may be the first motor 41. The first motor 41 is arranged on the mounting base 435, and the mounting base 435 is fixedly connected to the vertical fixed base frame 32; the first connecting unit 42 is connected to the first motor 41 and the movable base frame 33; the auxiliary connecting unit is floatingly connected to the movable base frame 33 and the horizontal fixed base frame 31, the first connecting unit 42 drives the movable base frame 33 to move along the auxiliary connecting unit. The first driving connection unit is provided to adjust the distance between the upper conveyor belt unit and the lower conveyor belt unit, so that the distance is adapted to the thickness of the PCB board 2, so as to realize the conveyance of different types of PCB boards 2.

2 and 3, the first connecting unit 42 in this embodiment includes a lead screw 421, a lead screw nut, a first connecting plate 422, a first mounting plate 423, an adjusting connecting column 424, a load-bearing connecting column 425, and T Type connector 426. The lead screw 421 is connected to the output end of the first motor 41, and the lead screw nut is threadedly connected to the lead screw 421 and fixedly connected to the first connecting plate 422; A U-shaped hole on the first mounting plate 423 on one side of a connecting plate 422 is fixed to the first mounting plate 423 by fasteners, and the second end of the adjusting connecting column 424 is fixed to the T-shaped connecting piece On 426, the two ends of the T-shaped connecting piece 426 are fixedly connected to the movable base frame 33, and the function of adjusting the connecting column 424 is to ensure that the conveyor belt unit remains horizontally conveyed by adjusting its inclination angle; the load-bearing connecting column 425 One end penetrates through the U-shaped hole on the first mounting plate 423 fixed on the other side of the first connecting plate 422 and is fixed to the first mounting plate 423 by fasteners, and the load-bearing connecting column 425 The second end is fixed on the T-shaped connecting piece 426. The vertical part of the T-shaped connecting piece 426 is located between the adjusting connecting column 424 and the load-bearing connecting column 425. The load-bearing connecting column 425 serves as the first drive for the load-bearing part The weight of the connecting unit usually does not need to be adjusted.

Specifically referring to FIG. 2, the auxiliary connection unit in this embodiment includes a second mounting plate 431, a guide shaft 432, a first linear bearing 433 and a slider 434. The second mounting plate 431 is fixed on the horizontal fixed base frame 31, the guide shaft 432 is fixed on the second mounting plate 431, the slider 434 is floatingly connected to the guide shaft 432 through the first linear bearing 433, and the slider 434 Fixedly connected to the movable base frame 33. The auxiliary connection unit is provided to ensure the movement stability of the movable base frame 33.

Referring to Fig. 3, only one upper conveyor belt unit is provided in this embodiment, the upper conveyor belt unit is arranged on the movable base frame 33, and three lower conveyor belt units are arranged along the same plane and are all arranged on the horizontal fixed base frame 31. The direction of rotation of the upper conveyor belt 511 is opposite to the direction of rotation of the lower conveyor belt to ensure that the conveying directions of the conveyor belt units located on the opposite side of the PCB board 2 are the same.

For the convenience of description, hereinafter referred to as the main conveyor shaft and conveyor belt of the upper conveyor belt unit are the upper main conveyor shaft 512 and the upper conveyor belt 511 in sequence; the three lower conveyor belt units are in turn from left to right in FIG. The lower conveyor belt unit, the second lower conveyor belt unit and the third lower conveyor belt unit. Correspondingly, the main conveyor shaft and conveyor belt of the first lower conveyor belt unit are the first lower main conveyor shaft 522 and the first lower conveyor respectively. Belt 521, the main conveyor shaft and conveyor belt of the second lower conveyor belt unit are the second lower main conveyor shaft 532 and the second lower conveyor belt 532 respectively, and the main conveyor shaft and conveyor belt of the third lower conveyor belt unit are respectively the third The lower main conveying shaft 542 and the third lower main conveying belt 541.

By providing a fixed base frame and a movable base frame 33, when the PCB board 2 is located on one of the lower conveyor belt units, the exposed upper surface of the PCB board 2 can be processed, such as detection, and the PCB board 2 and the lower conveyor When the lower surface contacted by the belt unit is subjected to processing such as detection, the upper conveyor belt unit adsorbs the PCB board 2 for transmission and exposes the lower surface for processing such as detection, thereby facilitating processing such as detection on both sides of the PCB board 2.

As shown in Figures 1 and 2, the upper detection unit includes an upper light source assembly 111 and an upper visual inspection assembly 112. The lower inspection unit includes a lower light source assembly 121 and a lower visual inspection assembly 122. The upper inspection unit is fixed on a vertical base frame. The upper second driving unit and the lower detection unit are fixed on the horizontal fixed base frame 31. The second drive unit drives the upper detection unit to move closer to or away from the lower conveyor belt unit. Specifically, the second driving unit may be the second motor 13. In this embodiment, the upper light source component 111 and the lower light source component 121 are respectively irradiated on both sides of the PCB board through the lower detection channel of the second lower conveyor belt unit and the upper detection channel of the upper conveyor belt unit, and the corresponding upper visual inspection components 112. The lower visual inspection component 122 visually inspects both sides of the PCB board 2 respectively. Specifically, the upper vision detection component 112 and the lower vision detection component 122 may be provided to include an upper CCD vision camera and a lower CCD vision camera, respectively. There is a first distance between the first lower conveyor belt unit and the second lower conveyor belt unit. The first distance allows the lower light source assembly 121 to illuminate the upper inspection channel, so as to allow the lower visual inspection assembly 122 to pass through the lower light source assembly 121 to the PCB. Board 2 performs visual analysis and inspection.

By providing a first drive unit to adjust the first distance between the upper conveyor belt unit and the lower conveyor belt unit and a second drive unit to adjust the second distance between the detection mechanism and the lower conveyor belt unit, the first distance and The second distance is adapted to the thickness of the PCB board 2 so as to realize the conveying and detection of different types of PCB boards 2.

3, the external power in this embodiment includes a third motor 61 and a fourth pulley 62, wherein the third motor 61 is fixed on the third mounting plate 311 provided on the horizontal fixed base frame 31 and is located on the lower conveyor Below the belt unit, the fourth pulley 62 is sleeved and fixed on the output shaft of the third motor 61.

3, the same-side transmission unit in this embodiment includes a first pulley transmission assembly 711 and a second pulley transmission assembly 712, wherein the first pulley transmission assembly 711 drives and connects the conveying shafts of the two lower conveyor belt units. The fourth pulley 62 and the second pulley transmission assembly 712 are drivingly connected to the conveying shaft of the other lower conveyor belt unit and the fourth pulley 62.

5, the first pulley transmission assembly 711 in this embodiment includes a first transmission belt 7112 and a first pulley 7111 respectively provided on the first lower main conveying shaft 522 and the second lower main conveying shaft 532. The transmission belt 7112 is sleeved and connected to the first pulley 7111 and the fourth pulley 62; the second pulley transmission assembly 712 in this embodiment includes a second transmission belt 7121, a first guide wheel arranged on the third mounting plate 311 7123 and a second pulley 7122 provided on the third lower main conveying shaft 542, and the second transmission belt 7121 is sleeved and connected to the second pulley 7122, the first guide pulley 7123, and the fourth pulley 62. Of course, the transmission unit on the same side can also be configured to include a pulley transmission assembly that drives and connects three pulleys and the fourth pulley 62 that are respectively provided on the main conveying shaft of the lower conveyor belt unit; or the same The side transmission unit may also be configured to include three pulley transmission assemblies, which respectively drive the pulleys connected to the main conveying shafts of the three lower conveyor belt units and the fourth pulley 62.

2 and 4, the different-side transmission unit in this embodiment includes a set of third pulley transmission assemblies 721 that are connected to the conveying shaft of the lower conveyor belt unit and the reversing assembly. Specifically, the third pulley transmission assembly 721 includes a third transmission belt 7211, a second guide wheel 7212, a connecting shaft 7213, and two third pulleys 7214, one of which is provided on the first lower main conveying shaft 522. At the end where the first pulley 7111 is not provided, the other third pulley 7214 is provided on the connecting shaft 7213 connected to the movable base frame 33, and the second guide wheel 7212 is provided on the movable base frame 33 On the fourth mounting plate 331, the third transmission belt 7211 is sleeved and connected to the third pulley 7214 and the second guide wheel 7212.

The reversing assembly in this embodiment includes a pair of gears that mesh with each other, a first gear 81 and a second gear 82, respectively. The first gear 81 is arranged coaxially with the pulley of the opposite side transmission unit, and the second gear 82 is arranged coaxially with one of the conveying shafts of the upper conveyor belt unit. 4, the first gear 81 is sleeved on the connecting shaft 7213, and the second gear 82 is sleeved on the upper main conveying shaft 512.

As shown in Figures 3 to 5, the tensioning component in this embodiment includes a first tensioning component 91, a second tensioning component 92, a third tensioning component 93, and a fourth tensioning component, where the first tensioning component Both the component 91 and the second tensioning component 92 tension the first transmission belt 7112, the third tensioning component 93 tensions the second transmission belt 7121, and the fourth tensioning component tensions the third transmission belt 7211. By providing a tensioning component, the tensioning force of the transmission belt is adjusted to avoid slippage and make the operation of the transmission belt stable.

5, the first tensioning assembly 91 includes a first tensioning wheel 911, a first tensioning connecting member 912, and a first limiting member 913. The first tensioning wheel 911 is rotatably arranged on the first tensioning connecting member 912. And abuts against the first transmission belt 7112 and is located between the first lower main conveying shaft 522 and the output shaft of the third motor 61, the first tension connector 912 is connected to the third mounting plate 311 and is fixed to Set in the arc-shaped hole 312 on the third mounting plate 311, the first limiting member 913 is provided on the side of the third mounting plate 311 to limit the movement of the first tension connecting member 912 toward the first limiting member 913 .

5, the second tensioning assembly 92 in this embodiment includes a second tensioning wheel 921, a second tensioning connecting member 922 and a second limiting member 923, the second tensioning wheel 921 is rotatably arranged on the second The tension connector 922 abuts the first transmission belt 7112 and is located between the second lower main conveying shaft 532 and the output shaft of the third motor 61. The second tension connector 922 is provided with a second strip hole 9221 and Set in the first sliding groove 313 on the third mounting plate 311, the second strip hole 9221 of the second tension connecting member 922 is fixed to the third mounting plate 311 by fasteners, and the second limiting member 923 It is arranged on the side of the third mounting plate 311 to restrict the movement of the second tension connecting member 922 toward the second limiting member 923.

5, the third tensioning assembly 93 in this embodiment includes a third tensioning wheel 931 and a third tensioning connecting piece. The third tensioning wheel 931 is rotatably arranged on the third tensioning connecting piece and abuts against The second transmission belt 7121, the third tension connecting member is an L-shaped structure, the L-shaped structure includes a connecting portion 9321 and a limiting portion 9322, the connecting portion 9321 is provided with a third strip hole 93211 and the third strip hole 93211 passes through the tight The firmware is fixed on the third mounting plate 311, and the side of the third mounting plate 311 restricts the limiting portion 9322 from moving toward the third mounting plate 311.

4, the fourth tensioning assembly in this embodiment includes a fourth tensioning wheel 941, a fourth tensioning connecting member 942, and a fourth limiting member 943. The fourth tensioning wheel 941 is rotatably arranged on the fourth tensioning member. The tightening connector 942 abuts against the third transmission belt 7211, the fourth tensioning connector 942 is provided with a fourth strip hole 9421 and is provided in the second sliding groove 3311 on the fourth mounting plate 331, and the fourth tensioning The fourth strip hole 9421 on the connecting member 942 is fixed to the fourth mounting plate 331 by fasteners, and the fourth limiting member 943 is provided on the side of the fourth mounting plate 331 to restrict the fourth tension connecting member 942 from facing Movement in the direction of the fourth limiter 943. By providing the fourth tensioning assembly, when the movable base frame 33 moves in a direction away from the horizontal fixed base frame 31, that is, when moving upward in FIG. 4, the third transmission belt 7211 is located between the connecting shaft 7213 and the second guide wheel 7212 The first length of the belt will increase. At this time, the second length of the third transmission belt 7211 on the connecting shaft 7213 and the first lower main conveying shaft 522 will appropriately decrease by itself, mainly reducing the fourth tensioning wheel 941 and the third The contact length between the transmission belts 7211, so that in the actual working process, when the movable base frame 33 moves upward in FIG. 4, the moving distance of the fourth tensioning wheel 941 is adjusted to be much smaller than the moving distance of the movable base frame 33, of course. The fourth tensioning wheel 941 may not be moved, depending on the working conditions.

When the third motor 61 drives the output shaft to rotate, the main conveying shafts of the three lower conveyor belt units are driven to rotate by the same-side transmission unit, and the rotation directions of the three are the same to realize the same direction of rotation of the conveyor belts of the lower conveyor belt units; The first lower main conveying shaft 522 drives the connecting shaft 7213 to rotate through the transmission unit on the opposite side, so that the rotation direction of the first lower main conveying shaft 522 is the same as that of the connecting shaft 7213. Because the connecting shaft 7213 and the upper main conveying shaft 512 pass through one The gears are meshed and connected so that the upper main conveying shaft 512 and the first lower main conveying shaft 522 are opposite, that is, the rotation direction of the upper conveying belt 511 is opposite to the rotation direction of the lower conveying belt, thereby realizing the alignment between the upper conveying belt 511 and the lower conveying belt. The same direction transmission of the PCB board 2 between the belts, that is, the conveying direction of the upper conveyor belt unit to convey the PCB board 2 and the conveying direction of the lower conveyor belt unit to convey the PCB board 2 are the same.

The conveying anti-warping mechanism in this embodiment includes an adjusting and pressing component and a warping detection component. The adjusting pressure component has a first working state and a second working state. In the first working state, the adjusting pressure component applies a flattening force to the PCB board 2 to flatten the PCB board 2; in the second working state, adjust The pressing component is acted on by the PCB board 2 to trigger the warpage detection part, and the testing machine sends out instructions such as an alarm sound to inform the operator, and the operator checks the position of the corresponding PCB board 2 to learn the degree of warpage of the PCB board 2. Specifically, the warpage detecting member may be a photo sensor 131.

In this embodiment, the adjusting and pressing component includes an installation and adjustment component, a pressure plate and a pressure plate connection component. The photoelectric sensor 131 is height-adjustably installed on the base 143 by installing the adjustment component, and the base 143 is fixed on the movable base frame 33. Specifically referring to FIG. 6, the installation adjustment component in this embodiment includes a U-shaped installation piece, an L-shaped installation piece, and a base 143. The first vertical end arm 1411 of the U-shaped mounting piece and the second vertical end arm 1421 of the L-shaped mounting piece are all provided with a first strip hole and fixed by fasteners, and the first level of the L-shaped mounting piece is The end arm 1422 is provided with a first through hole 14221. The fastener is threadedly connected to the first through hole 14221 and abuts on the second horizontal end arm 1412 of the U-shaped mounting part; the base 143 is fixed on the base frame, The third horizontal end arm 1413 of the U-shaped mounting member is provided with a fifth strip hole and is fixed on the base 143 by fasteners. By providing an installation adjustment component, the distance between the photoelectric sensor 131 and the pressing plate can be adjusted to prevent warping of PCB boards 2 of different thicknesses.

In this embodiment, the pressure plate connection assembly is fixedly connected to the pressure plate and movably connected to the base 143 to float on the movable base frame 33. The base 143 restricts the pressure plate connection assembly to move away from the photoelectric sensor 131. The pressing plate is an L-shaped pressing plate 15, wherein the bottom arm of the L-shaped pressing plate 15 presses the PCB board 2 flat.

Specifically referring to FIG. 6, the pressure plate connecting assembly in this embodiment includes a first connecting block 165, a trigger rod 161, a first linear bearing 162 and two clamping parts. The clamping member may be a clamping spring. In this embodiment, the side arm of the L-shaped pressure plate 15 is fixedly connected to the side of the first connecting block 165 by fasteners, the first linear bearing 162 is penetrated on the base 143, and the trigger rod 161 is penetrated on In the first linear bearing 162 and one end of the trigger rod 161 is fixed on the first connecting block 165, the first circlip 163 is clamped on the first linear bearing 162 and located on the base 143 close to the photoelectric sensor 131 The second retaining spring 164 is clamped on the trigger rod 161 and is located on the side of the first linear bearing 162 close to the photoelectric sensor 131. The trigger rod 161 is driven by the pressure plate to move toward the photo sensor 131, and the photo sensor 131 is triggered when the trigger rod 161 rises to a predetermined position. It should be noted that the predetermined position is a position between the two bosses 1311 of the photoelectric sensor 131.

With the circlips, when the PCB board 2 with a large degree of warping is not affected, the clamping pieces abut against the base 143 and the first linear bearing 162 respectively to limit the first linear bearing 162 and trigger The rod 161 moves in a direction away from the photoelectric sensor 131 to achieve a flattening effect on the PCB board 2 with a small degree of warpage, and is convenient for installation and saves manufacturing costs.

Among them, the working process of the conveying anti-warping mechanism: when the initial work has not yet started, first adjust the installation position of the photoelectric sensor 131, the clamping position of the first circlip 163 on the first linear bearing 162, and the trigger lever 161 The clamping position of the second circlip 164, at this time the first circlip 163 on the first linear bearing 162 abuts on the base 143 and the second circlip 164 on the trigger lever 161 abuts on the first straight line Bearing 162 on. When the warpage of the PCB board 2 is small and there is a gap with the L-shaped pressing plate 15 and there is no contact, the PCB board 2 does not need to be flattened at this time; when the PCB board 2 is relatively small and is in contact with the L-shaped pressing plate 15 , The pressure adjustment assembly is in the first working state, at this time, the L-shaped pressure plate 15 will exert a force on the PCB board 2 to flatten the PCB board 2; when the warpage of the PCB board 2 is too large and contact with the L-shaped pressure plate 15 When the pressure adjustment component is in the second working state, the PCB board 2 will exert a force on the L-shaped pressure plate 15 so that the L-shaped pressure plate 15 drives the trigger rod 161 to move toward the direction close to the photoelectric sensor 131 and move to a predetermined position When the photoelectric sensor 131 is triggered at this time, the operator knows that the warpage of the PCB board 2 is too large, and then manually flatten the PCB board 2, and manually make the first linear bearing 162 and the trigger rod 161 face away from the photoelectric sensor 131 Move in the direction of, until the first circlip 163 on the first linear bearing 162 abuts on the base 143 and the second circlip 164 on the trigger rod 161 abuts on the first linear bearing 162.

By providing the warpage detection component and the adjusting pressure component, when the warpage of the PCB board 2 is not enough to make the adjustment pressure component move, the adjustment pressure component acts on the PCB board 2 to flatten the PCB board 2. In the first working state, and when the degree of warpage of the PCB board 2 is too large to make the adjustment pressing component move, the PCB board 2 acts on the adjustment application component to move to the detection position of the warpage detection part and is in the second In the working state, after the warpage detection component is triggered, the PCB board 2 is manually flattened to avoid damage to the PCB board 2 due to instantaneous force. It should be noted that the conveying anti-warping mechanism can be set close to the position of the rotating part such as the conveying shaft. Only when an instruction message such as an alarm is issued, the operator needs to check the PCB board 2 near the position of the rotating part. The manual flattening reduces the occurrence of the operator flattening the PCB board 2 at the position where the rotating part is located, and ensures the operator's operation safety.

The correction mechanism in this embodiment includes a correction adjustment assembly and a pressing assembly. The correction adjustment assembly is movably arranged on the movable base frame 33. The pressing assembly is connected with the correction adjustment assembly. The correction adjustment assembly adjusts the tension of the pressing assembly on the conveyor belt. . As shown in Figure 7, there are two symmetrical correction mechanisms in this embodiment.

As shown in FIG. 8, the pressing assembly in this embodiment includes a pressing roller 171 and a pressing roller shaft 172, and the pressing roller 171 is rotatably arranged on the pressing roller shaft 172. The axis of the pressure roller 171 is set perpendicular to the conveying direction of the conveyor belt unit, and it has an axial inner end 1722 extending into the upper part of the conveyor belt and an axial outer end 1721 exposed on the conveyor belt, and the axial inner end 1722 is higher than the axial outer end 1721, and the axial inner end 1722 is connected to the movable base frame 33 through the second connecting column 20. The movable base frame 33 and the second connecting column 20 are integrally arranged or separately arranged.

The correction and adjustment assembly in this embodiment includes a correction and adjustment action member and a correction adjustment connection assembly, the correction adjustment action member acts on the correction adjustment connection assembly, and the correction adjustment assembly is connected to the compression assembly. As shown in FIG. 8, the correcting and adjusting member in this embodiment is a first screw 181. The first screw 181 is threadedly connected to the fixing plate 182, and the end of the first screw 181 abuts against the correcting and adjusting connection assembly, wherein the fixing plate It is fixed on the movable base frame 33 by fasteners. By adjusting the first screw 181 to adjust the pressing component to be pressed against the conveyor belt to realize deviation correction, the situation of manual and direct operation of the conveyor belt for correction is avoided, and the adjustment accuracy of the correction adjustment is improved.

As shown in FIG. 8, the correction and adjustment connection assembly in this embodiment includes a mounting connection block 19 and a first connection post 192, and the first connection post 192 is provided at the axial outer end of the installation connection block 19 and the pressure roller shaft 172 Between 1721 and the three are connected by fasteners. The installation connecting block 19 and the first connecting post 192 are integrally or separately arranged, and the axially outer end 1721 and the axially inner end 1722 of the pressing roller shaft 172 can be rotated.

As shown in FIG. 8, the installation connecting block 19 in this embodiment is provided with a sixth strip hole 191, and the sixth strip hole 191 is connected to the movable base frame 33 by a fastener; the first connecting column 192 is penetrated and fixed On the mounting block and connected to the compression assembly.

By providing a correction mechanism in which the compression component acts on the loose side of the conveyor belt to compress, the tension on the loose side of the conveyor belt due to the compression component is greater than the tension on the other side. Move from the position of high tension to the position of low tension, so that the loose side of the conveyor belt will move to the other side, thus realizing the correction of the conveyor belt; and by setting the axial inner end of the pressing roller 171 The portion 1722 is higher than the axially outer end 1721 of the pressing roller 171, so that the pressing assembly will apply a force toward the other side of the conveyor belt when the pressing assembly is pressing the conveyor belt, so as to prevent the loose side of the conveyor belt from continuing to shift.

The method of using the correction mechanism is to rotate the first screw 181 to drive the mounting connecting block 19 to move toward the direction of the conveyor belt, thereby driving the pressure roller shaft 172 to press down on the loose side of the conveyor belt, making the loose side of the conveyor belt The tension is greater than the other side, so that the loose side of the conveyor belt moves toward the other side to realize the correction of the conveyor belt.

The working process of the testing machine of this application is as follows:

First, the PCB board 2 is first transferred through the first lower conveyor belt unit; secondly, the PCB board 2 that was previously located in the first lower conveyor belt unit is absorbed and transferred by the upper conveyor belt unit;

After the conveying anti-warping mechanism works, the lower inspection unit will inspect the PCB board 2;

Then, the second lower conveyor belt unit sucks and transfers the PCB board 2 previously located on the upper conveyor belt unit, and the upper detection unit detects the PCB board 2. In the transmission process of the two conveyor belt units, the upper conveyor belt unit passes through The suction of the upper suction unit realizes the suction of the PCB board from the first lower conveyor belt unit to the upper conveyor belt unit.

After that, the PCB board is transferred to the third lower conveyor belt unit via the second lower conveyor belt unit, and the tested PCB board 2 is externally output by the third lower conveyor belt unit to complete the transmission and inspection of the PCB board 2. It should be noted that when the lower conveyor belt unit is equipped with a suction unit, the lower conveyor belt unit also adsorbs and transmits the PCB board 2. During the transmission process, it needs to meet: the suction force of the suction unit on the upper conveyor belt unit needs to overcome the first lower conveyor The suction of the suction unit on the belt unit and the gravity of the PCB board 2 itself, the suction of the suction unit on the second lower conveyor belt unit and the gravity of the PCB board 2 need to overcome the suction of the upper conveyor belt unit; the correction mechanism is only on the conveyor belt When the deviation occurs, the tester will work after correcting the deviation; the distance between the upper conveyor belt unit and the lower conveyor belt unit, the distance between the detection mechanism and the conveyor belt unit are all based on the thickness of the PCB board 2. It has been adjusted before.

Obviously, the above-mentioned embodiments are merely examples for clear description, and are not intended to limit the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the scope of protection created by this application.

Claims

A testing machine includes a base frame; it is characterized in that it also includes:

The conveying mechanism, which is driven by external power to transmit the workpiece to be inspected, includes a power transmission unit and a plurality of upper and lower conveyor belt units located on both sides of the workpiece to be inspected, and the power transmission between each of the conveyor belt units Unit drive connection;

The detection channel includes an upper detection channel formed at the end of any one of the upper conveyor belt units, and a lower detection channel formed at the end of any one of the lower conveyor belt units;

And a detection mechanism, including an upper detection unit and a lower detection unit respectively corresponding to the upper detection channel and the lower detection channel, the detection unit passes through the detection channel to visualize both sides of the workpiece to be detected Detection

The power transmission unit includes a same-side transmission unit, a different-side transmission unit, and a reversing assembly. The same-side transmission unit is drivingly connected to each conveyor belt unit located on the same side of the workpiece to be detected, and the different-side transmission unit is drivingly connected Conveyor belt units located on different sides of the workpiece to be inspected; the reversing assembly is arranged on any one of the conveying belt units, and the reversing assembly is drivingly connected to the conveyor belt unit and the opposite-side transmission unit.
The testing machine according to claim 1, further comprising a conveying anti-warping mechanism provided on the base frame, and the conveying anti-warping mechanism includes an adjusting pressure component and a warping detecting member, The adjusting pressure component has a first working state and a second working state. In the first working state, the adjusting pressure component applies a flattening force to the workpiece to be inspected; in the second working state At this time, the adjusting and pressing component is acted on by the workpiece to be detected to trigger the warpage detection component.
The testing machine according to claim 2, wherein the adjusting and pressing component comprises a pressure plate and a trigger rod fixedly connected to the pressure plate, the pressure plate is floatingly arranged on the base frame, and the trigger rod is The pressing plate is driven to move in a direction close to the warpage detection part;

The warpage detecting member is a photoelectric sensor, and the photoelectric sensor is triggered after the trigger rod rises to a predetermined position.
A testing machine according to claim 3, wherein the height of the photoelectric sensor is adjustable.
The testing machine according to claim 4, further comprising a correction mechanism, which comprises a correction adjustment assembly and a pressing assembly, the correction adjustment assembly is movably arranged on the base frame, and the pressing assembly Connected with the deviation correction adjustment assembly, the deviation correction adjustment assembly adjusts the tension of the pressing assembly acting on the conveyor belt of the conveyor belt unit.
A testing machine according to claim 5, wherein the correction adjustment assembly comprises a correction adjustment action member and a correction adjustment connection assembly, the correction adjustment action member acts on the correction adjustment connection assembly, and the correction adjustment connection assembly The adjusting connecting component is connected to the pressing component.
The testing machine according to claim 6, wherein the correcting and adjusting connection assembly comprises a mounting connection block and a first connection post, the mounting connection block is provided with a strip hole through which the strip hole passes The fastener is connected to the base frame, and the first connecting column is fixed on the installation connecting block and connected to the pressing assembly.
The testing machine according to claim 7, wherein the pressing assembly includes a pressing roller, the axis of the pressing roller is arranged perpendicular to the conveying direction of the conveyor belt unit, and the pressing roller has an extension Into the axial inner end above the conveyor belt and the axial outer end exposed to the conveyor belt, the axial inner end is set higher than the axial outer end, the axial inner end The part is connected to the base frame, and the axially outer end part is connected to the first connecting column.
The testing machine according to any one of claims 1 to 8, wherein the same-side transmission unit and the opposite-side transmission unit are both pulley transmission components; the reversing unit includes a pair In the gears that are meshed with each other, one of the gears and the pulley of the opposite-side transmission unit are arranged coaxially, and the other gear is arranged coaxially with the conveying shaft of the upper conveyor belt unit.
The testing machine according to claim 1, wherein the base frame includes a fixed base frame and a movable base frame, the upper conveyor belt unit is provided on the movable base frame, the first driving unit, the second The two driving units, the lower conveyor belt unit, and the detection mechanism are all arranged on the fixed base frame, wherein the first driving unit drives the movable base frame to move, and the second driving unit drives the detection Institutional movement.