Detection machine table with clamping plate device and optical detection equipment with detection machine table

Abstract

The utility model discloses a detection machine table with a clamping plate device and optical detection equipment with the detection machine table. The clamping plate device is arranged on the side edge of the workbench and comprises at least two press-fit assemblies, each press-fit assembly comprises a press-fit part, a first linkage part and a second linkage part, and the press-fit parts and the first linkage parts are connected with the second linkage parts; under the driving of the vertical driving mechanism, the second linkage piece drives the pressing part to do linear movement in the vertical direction; under the driving of the horizontal driving mechanism, the first linkage piece drives the second linkage piece and the pressing part to do linear motion in the horizontal plane; the clamping plate device has a first state and a second state, in the first state, the pressing parts are arranged on the side edge of the workbench side by side, in the second state, the pressing parts are at least partially located above the workbench, and the thickness of a gap between the pressing parts is matched with the thickness of a circuit board or a carrier plate to be detected. The detection machine provided by the utility model has a good adsorption function and can cope with the problem of plate edge warping.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to a testing machine with a clamping device and an optical testing device having the same. Background Technology

[0002] Circuit board testing equipment is essential for determining whether a circuit board is qualified. Generally, circuit boards are designed with large areas of copper foil for grounding. When these large areas of copper foil are not evenly distributed on the same circuit board, it will cause uneven heat absorption and dissipation. The circuit board will also expand and contract with temperature changes. If the expansion and contraction are not simultaneous, it will cause different stresses and deformation. If the temperature of the board has reached the upper limit of the glass transition temperature, the board will begin to soften, causing permanent deformation.

[0003] Taking PCB / IC substrate as an example, the board edge warping caused by the above-mentioned process issues is quite common. This increases the inspection difficulty of optical inspection equipment. Because the warped vacuum stage will break the vacuum, the adsorption in the inspection area will be uneven, the flatness of the board surface will be worse, and thus the inspection accuracy of the optical inspection equipment will be affected.

[0004] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application, nor does it necessarily provide technical guidance. In the absence of clear evidence that the above information was disclosed before the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The purpose of this invention is to provide a testing machine with a clamping device and an optical testing device having the same, which can address the problem of board edge warping and thus improve the testing accuracy of the optical testing device for circuit boards or IC carrier boards.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A testing machine with a clamping device, comprising:

[0008] A workbench, configured to support a circuit board or carrier board to be tested;

[0009] The clamping device disposed on the side of the workbench includes at least two pressing components. Each pressing component includes a pressing part, a first linkage member, and a second linkage member. The pressing part and the first linkage member are both connected to the second linkage member.

[0010] Vertical drive mechanism and horizontal drive mechanism;

[0011] Driven by the vertical drive mechanism, the second linkage component drives the pressing part to move linearly in the vertical direction; driven by the horizontal drive mechanism, the first linkage component drives the second linkage component and the pressing part to move linearly in the horizontal plane.

[0012] The clamping device has a first state and a second state. In the first state, the pressing parts are arranged side by side on the side of the workbench. In the second state, the pressing parts are at least partially located above the workbench, and the gap thickness between them is adapted to the thickness of the circuit board or carrier board to be tested.

[0013] Furthermore, based on any or a combination of the aforementioned technical solutions, the workbench surface is polygonal, the pressing part is a horizontally arranged strip-shaped plate, and its lower surface is at least partially flat.

[0014] The second linkage includes a first component and a second component that can slide relative to each other, wherein the first component is fixedly connected to the pressing part and is driven by the vertical driving mechanism; the second component is fixedly connected to the first linkage.

[0015] Furthermore, following any one or a combination of the aforementioned technical solutions, the first linkage member has a vertical side surface, the first linkage member is disposed below the pressing part, the body of the vertical drive mechanism is fixed on the vertical side surface of the first linkage member, and the drive end of the vertical drive mechanism is fixedly connected to the first component of the second linkage member.

[0016] Furthermore, in accordance with any or a combination of the aforementioned technical solutions, the testing machine also includes a buffer, which is disposed below the pressing part of the pressing assembly. The buffer is equipped with a floating buffer head, the initial height of which is higher than the table height of the worktable.

[0017] Each of the pressing components corresponds to at least one buffer;

[0018] When the pressing assembly moves vertically downward under the drive of the vertical drive mechanism, the buffer head of the buffer is pressed down by the pressing part and its height is reduced.

[0019] Furthermore, in accordance with any or a combination of the aforementioned technical solutions, each side of the workbench is provided with the pressing component;

[0020] Each pressing part has a buffer positioned vertically opposite to both ends of it.

[0021] Furthermore, in accordance with any or a combination of the aforementioned technical solutions, the worktable further includes a vacuum chamber, which is located in the middle of the worktable and has its upper part used to place the circuit board or carrier board to be tested.

[0022] A vacuum pumping assembly is provided on the back side of the vacuum chamber.

[0023] Furthermore, based on any or a combination of the aforementioned technical solutions, the vacuuming assembly includes a vacuuming port and a vacuuming connection assembly.

[0024] The air extraction connection assembly is located below the vacuum chamber, and an air extraction channel communicating with the vacuum chamber is formed inside it.

[0025] Furthermore, in accordance with any or a combination of the aforementioned technical solutions, the workbench also includes a proximity switch;

[0026] The proximity switch is used to sense the circuit board or carrier board to be detected, and triggers the clamping device to switch from the first state to the second state based on the sensing result.

[0027] Furthermore, in accordance with any or a combination of the aforementioned technical solutions, the pressing assembly further includes a horizontal micro-guide rail and a vertical micro-guide rail respectively connected to the horizontal drive mechanism and the vertical drive mechanism;

[0028] The horizontal micro guide rail, in conjunction with the horizontal drive mechanism, enables the pressing part to reciprocate in the horizontal direction;

[0029] The vertical miniature guide rail, in conjunction with the vertical drive mechanism, enables the pressing part to reciprocate in the vertical direction.

[0030] According to another aspect of the present invention, an optical inspection device is provided, including an inspection camera and an inspection machine as described above.

[0031] The beneficial effects of the technical solution provided by this utility model are as follows:

[0032] a. A clamping plate device is installed on the outside of the inspection workbench to expand the support area of ​​the workbench on the workpiece, or to press the periphery of the workpiece on the workbench to ensure that the workpiece is inspected with good flatness and improve the inspection accuracy.

[0033] b. By setting up a pressing component and cooperating with a corresponding buffer, the pressing component can move up and down and left and right, so that the plate to be tested can be better adsorbed on the worktable of the testing machine.

[0034] c. By setting a proximity switch, the clamping device is controlled by the sensing signal of the proximity switch, so that when a pressing operation is required on a circuit board or carrier board that meets the size requirements, the clamping device is activated and switched to the second state. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of a pressing assembly provided for an exemplary embodiment of the present invention;

[0037] Figure 2 A perspective view of the detection workbench provided as an exemplary embodiment of the present invention, viewed from above.

[0038] Figure 3 A perspective view of the detection workbench provided as an exemplary embodiment of the present invention, viewed from below.

[0039] Figure 4 for Figure 1 A schematic diagram of the pressing assembly from another perspective.

[0040] Among them, 100-worktable, 200-pressing assembly, 201-pressing part, 202-first linkage component, 203-second linkage component, 301-vertical drive mechanism, 302-horizontal drive mechanism, 4-buffer, 5-proximity switch, 6-vacuum chamber, 701-vacuum port, 702-vacuum connection assembly. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, apparatus, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0043] In one embodiment of this utility model, such as Figure 2 As shown, a testing machine with a clamping device is provided, including a worktable 100, a clamping device, a vertical drive mechanism 301 and a horizontal drive mechanism 302, wherein the clamping device is disposed on the side of the worktable 100.

[0044] The clamping device includes at least two pressing components, such as Figure 1 and Figure 4 As shown, each of the pressing components 200 includes a pressing part 201, a first linkage 202, and a second linkage 203. The pressing part 201 and the first linkage 202 are both connected to the second linkage 203. The at least two pressing components 200 are respectively disposed on the outer sides of two opposite sides of the worktable 100. In one embodiment, the worktable 100 is quadrilateral, and pressing components 200 are provided on the outer sides of all four sides.

[0045] Driven by the vertical drive mechanism 301, the second linkage 203 drives the pressing part 201 to move linearly up and down; driven by the horizontal drive mechanism 302, the first linkage 202 drives the second linkage 203 and the pressing part to move linearly in the horizontal plane. Through the vertical and horizontal movement, the pressing part 201 of the pressing assembly 200 presses the circuit board or IC carrier placed on the worktable 100 downward.

[0046] The clamping device has a first state and a second state. In the first state, the pressing parts 201 are arranged side by side on the side of the worktable 100. In the second state, the pressing parts 201 are at least partially located above the worktable 100, and the gap thickness between them is adapted to the thickness of the circuit board or carrier board to be tested. For example, the vertical drive mechanism 301 and the horizontal drive mechanism 302 can be cylinders; the cylinder stroke in the vertical direction is 15mm, which can achieve clamping of board edge warping ≤10mm.

[0047] When the clamping device is in the first state, it can expand the support area of ​​the worktable 100 for the workpiece to be inspected, so as to meet the inspection needs of circuit boards or carrier boards with an area exceeding that of the worktable 100; when the clamping device switches from the first state to the second state, it can press the periphery of the workpiece to be inspected on the worktable 100 to ensure that the workpiece to be inspected is inspected with good flatness and improve the inspection accuracy.

[0048] In one embodiment, the pressing part 201 is a horizontally arranged strip-shaped plate, and its lower surface is at least partially flat (for pressing the edge area of ​​the circuit board or carrier board to ensure its flatness); the second linkage 203 includes a first component and a second component that can slide relative to each other, wherein the first component is fixedly connected to the pressing part 201 and is driven by the vertical drive mechanism 301; the second component is fixedly connected to the first linkage 202. The first linkage 202 has a vertical side surface and is disposed below the pressing part 201. The body of the vertical drive mechanism 301 is fixed to the vertical side surface of the first linkage 202, and the driving end of the vertical drive mechanism 301 is fixedly connected to the first component of the second linkage 203.

[0049] Accordingly, the process of switching the clamping device from the first state to the second state is as follows: The vertical drive mechanism 301 drives the first component of the second linkage 203 to move upward, and at the same time drives the pressing part 201 to move upward, so that the pressing part 201 is raised above the worktable 100 (and above the upper surface of the circuit board or carrier plate on the worktable 100); then the horizontal drive mechanism 302 drives the first linkage 202 to move horizontally inward, and at the same time drives the second component, the first component, and the pressing part 201 of the vertical drive mechanism 301 and the second linkage 203 to move horizontally inward, so that the inner side of the pressing part 201 enters the upper area of ​​the worktable 100; then the vertical drive mechanism 301 drives the first component of the second linkage 203 to move downward, and at the same time drives the pressing part 201 to move downward, so that the pressing part 201 descends to its flat lower surface to adhere to the edge upper surface of the circuit board or carrier plate on the worktable 100. The driving stroke of the vertical drive mechanism 301 needs to be adapted to the thickness of the circuit board or carrier board, so as to both press down on it to overcome the problem of curling edges and avoid damaging it.

[0050] In one embodiment of this utility model, such as Figure 2 As shown, the testing machine also includes a buffer 4, which is disposed below the pressing part 201 of the pressing assembly. The buffer 4 is equipped with a floating buffer head, and the initial height of the buffer head is higher than the table height of the worktable 100.

[0051] Each of the pressing components corresponds to at least one buffer;

[0052] When the pressing assembly moves vertically downward under the drive of the vertical drive mechanism, the buffer head of the buffer 4 is lowered by the pressing part 201 to release the inertial force generated during the pressing process of the pressing part 201.

[0053] For example, such as Figure 2 The pressing components 200 are four in number, and are arranged opposite to each other on the four sides of the worktable 100;

[0054] The number of buffers is eight, which are respectively set at both ends of the pressing part 201 of each pressing assembly 200. The buffers 4 cooperate with the downward pressing movement of the pressing part 201 to reduce inertial force and effectively avoid damaging impacts to the circuit board or carrier board.

[0055] In one embodiment of the present invention, the pressing assembly further includes a horizontal micro guide rail and a vertical micro guide rail respectively connected to the horizontal driving mechanism and the vertical driving mechanism;

[0056] The horizontal micro guide rail, in conjunction with the horizontal drive mechanism, enables the pressing part to reciprocate in the horizontal direction.

[0057] The vertical miniature guide rail, in conjunction with the vertical drive mechanism, enables the pressing part to reciprocate in the vertical direction.

[0058] For example, during the pressing process of the pressing assembly 200, by setting two buffers 4 to cooperate with one pressing assembly 200, the inertial force of the edge of the circuit board or carrier board to be tested during the pressing process can be released, so as to avoid damage to the part of the circuit board or carrier board to be tested that is pressed by the pressing part 201.

[0059] In one embodiment of this utility model, such as Figure 3 As shown, the worktable 100 also includes a vacuum chamber 6, which is located in the middle of the worktable 100. The table surface of the worktable 100 has the following characteristics: Figure 2 The array of through holes shown is used to place the circuit board or carrier board to be tested on the worktable 100.

[0060] A vacuum pumping assembly is provided on the back side of the vacuum chamber 6; by evacuating the vacuum assembly, the vacuum chamber 6 can adsorb the circuit board or carrier board to be tested onto the table surface of the worktable 100.

[0061] Specifically, the vacuum assembly includes a vacuum port 701 and an air extraction connection assembly 702. The air extraction connection assembly 702 is located below the vacuum chamber 6, and its interior forms an air extraction channel communicating with the vacuum chamber 6. An external air extraction device is connected to the vacuum port 701, and air flows from the vacuum chamber 6 into the air extraction connection assembly 702, and then flows out of the worktable 100 through the vacuum port 701, causing the circuit board or carrier board to be tested to adhere to the surface of the worktable 100. In a specific embodiment, the vacuum chamber 6 is rectangular, and the corresponding side length of the vacuum chamber is greater than or equal to the length of the corresponding pressing assembly 200.

[0062] In one embodiment of the present invention, the workbench further includes a proximity switch 5; the proximity switch 5 is used to sense the circuit board or carrier board to be detected, and trigger the clamping device to start (switch from the first state to the second state) or not start (remain in the first state) according to the sensing result.

[0063] The proximity switch 5 triggers the clamping device to start or not start based on the sensing result, specifically:

[0064] When the area of ​​the circuit board or carrier board to be tested exceeds the preset proximity switch limit area, the proximity switch 5 is triggered (outputs a high-level signal). At this time, the pressing assembly 200 is controlled not to start, that is, the area above the pressing part 201 is also used as the placement area of ​​the circuit board or carrier board to be tested.

[0065] When the area of ​​the circuit board or carrier board to be tested is smaller than the limit area of ​​the adjacent switch, the proximity switch 5 is not triggered (outputs a low-level signal); at this time, the pressing component 200 is activated and presses down on the circuit board or carrier board to be tested by moving up and down and left and right according to the size of the circuit board or carrier board.

[0066] For example, the proximity switch 5 can be one, two, three, or four, and the proximity switch 5 is disposed outside the vacuum chamber.

[0067] When there are four proximity switches, the four proximity switches are evenly arranged on the outside of the vacuum cavity 6 and are located in the concave area formed by two adjacent pressing components 200.

[0068] For example, the pressing assembly 200 can be flush with the upper surface of the vacuum chamber 6 in the default state. When it is not flush, the pressing assembly 200 is flush with the upper surface of the vacuum chamber by the driving action of the vertical driving mechanism 301 and the horizontal driving mechanism 302. At this time, the testing machine can be used for large-sized circuit boards or carrier boards. The upper surface of the pressing assembly can be used as part of the placement area of ​​the circuit board or carrier board to be tested. This design enables the testing machine of this utility model to test large-sized boards.

[0069] For standard-sized plates, such as those matching the size of a vacuum chamber, the pressing assembly can be moved up and down and left and right by the vertical drive mechanism 301 and the horizontal drive mechanism 302, so that the plate to be tested can be clamped.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0071] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A testing machine with a clamping device, characterized in that, include: A workbench, configured to support a circuit board or carrier board to be tested; The clamping device disposed on the side of the workbench includes at least two pressing components. Each pressing component includes a pressing part, a first linkage member, and a second linkage member. The pressing part and the first linkage member are both connected to the second linkage member. Vertical drive mechanism and horizontal drive mechanism; Driven by the vertical drive mechanism, the second linkage component drives the pressing part to move linearly in the vertical direction; driven by the horizontal drive mechanism, the first linkage component drives the second linkage component and the pressing part to move linearly in the horizontal plane. The clamping device has a first state and a second state. In the first state, the pressing parts are arranged side by side on the side of the workbench. In the second state, the pressing parts are at least partially located above the workbench, and the gap thickness between them is adapted to the thickness of the circuit board or carrier board to be tested.

2. The testing machine according to claim 1, characterized in that, The workbench has a polygonal surface, and the pressing part is a strip-shaped horizontally arranged plate with at least a flat surface on its lower surface. The second linkage includes a first component and a second component that can slide relative to each other, wherein the first component is fixedly connected to the pressing part and is driven by the vertical driving mechanism; the second component is fixedly connected to the first linkage.

3. The testing machine according to claim 2, characterized in that, The first linkage has a vertical side surface and is disposed below the pressing part. The body of the vertical drive mechanism is fixed on the vertical side surface of the first linkage and the drive end of the vertical drive mechanism is fixedly connected to the first component of the second linkage.

4. The testing machine according to claim 1, characterized in that, The testing machine also includes a buffer, which is disposed below the pressing part of the pressing assembly. The buffer is equipped with a floating buffer head, the initial height of which is higher than the table height of the worktable. Each of the pressing components corresponds to at least one buffer; When the pressing assembly moves vertically downward under the drive of the vertical drive mechanism, the buffer head of the buffer is pressed down by the pressing part and its height is reduced.

5. The testing machine according to claim 4, characterized in that, Each side of the workbench is provided with the pressing assembly; Each pressing part has a buffer positioned vertically opposite to both ends of it.

6. The testing machine according to claim 1, characterized in that, The workbench also includes a vacuum chamber, which is located in the middle of the workbench and has its upper part used to place the circuit board or carrier board to be tested. A vacuum pumping assembly is provided on the back side of the vacuum chamber.

7. The testing machine according to claim 6, characterized in that, The vacuum assembly includes a vacuum port and a vacuum connection assembly; The air extraction connection assembly is located below the vacuum chamber, and an air extraction channel communicating with the vacuum chamber is formed inside it.

8. The testing machine according to claim 1, characterized in that, The workbench also includes a proximity switch; The proximity switch is used to sense the circuit board or carrier board to be detected, and triggers the clamping device to switch from the first state to the second state based on the sensing result.

9. The testing machine according to claim 1 or 2, characterized in that, The pressing assembly also includes a horizontal micro-guide rail and a vertical micro-guide rail that are respectively connected to the horizontal drive mechanism and the vertical drive mechanism; The horizontal micro guide rail, in conjunction with the horizontal drive mechanism, enables the pressing part to reciprocate in the horizontal direction; The vertical micro guide rail, in conjunction with the vertical drive mechanism, enables the pressing part to reciprocate in the vertical direction.

10. An optical inspection device, characterized in that, It includes a detection camera and a detection machine as described in any one of claims 1 to 9.

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