PCB board expansion and contraction measuring device and PCB board production line

Abstract

The utility model discloses a kind of PCB board expansion and contraction measuring equipment and PCB board production line, it is related to PCB board production technical field.The PCB board expansion and contraction measuring equipment includes conveying mechanism, positioning mechanism and identification measurement mechanism, conveying mechanism can convey the PCB board of feeding position to measurement position, positioning mechanism is used to temporarily fixed in the PCB board of measurement position, identification measurement mechanism includes multiple identification components, multiple identification components are used to one-to-one corresponding identification multiple identification point position.The PCB board expansion and contraction measuring equipment, the distance between each identification point can be determined according to the position information obtained in each identification point, so as to determine the size of PCB board.

Description

Technical Field

[0001] This utility model belongs to the field of PCB board manufacturing technology, and in particular relates to a PCB board expansion and contraction measurement device and a PCB board production line. Background Technology

[0002] The expansion and contraction of PCBs (Printed Circuit Boards) has always been a challenging aspect of PCB manufacturing, as many factors influence board deformation. These factors include the inherent properties of the material itself, with its coefficient of expansion and contraction varying significantly under different temperature and pressure conditions. This is particularly true for thin base materials. Factors such as the manufacturing environment (temperature and humidity), manufacturing processes (high temperature and pressure during lamination), wet processes (e.g., electroplating, cleaning, micro-etching), stress release during etching, and mechanical forces during post-filling grinding, as well as manufacturing parameters (temperature and pressure), all contribute to board deformation. Therefore, measuring PCB expansion and contraction is crucial in PCB production.

[0003] In existing technologies, the dimensions of PCB boards after expansion and contraction need to be measured manually. This is inconvenient, inefficient, and the accuracy of manual inspection is not high, with large errors, which cannot meet people's needs. Utility Model Content

[0004] The technical problem to be solved by this utility model is: to address the low work efficiency of existing manual measurement of PCB board dimensions after expansion and contraction, and to provide a PCB board expansion and contraction measurement device and a PCB board production line.

[0005] To address the aforementioned issues, this utility model provides a PCB board expansion and contraction measurement device for measuring the dimensions of a PCB board. The upper surface of the PCB board is provided with multiple identification points, including a conveying mechanism, a positioning mechanism, and an identification and measurement mechanism. The conveying mechanism can transport the PCB board from the loading position to the measurement position. The positioning mechanism is used to temporarily fix the PCB board located at the measurement position. The identification and measurement mechanism includes multiple identification components, which are used to identify the positions of the multiple identification points one by one.

[0006] As a further improvement to the above technical solution:

[0007] Optionally, the identification and measurement mechanism further includes an adjustment component, on which each identification component is mounted, and the adjustment component is used to adjust the position of each identification component.

[0008] Optionally, the adjustment assembly includes a first horizontal adjustment unit, a second horizontal adjustment unit, and a vertical adjustment unit. The second horizontal adjustment unit is installed on the first horizontal adjustment unit, the vertical adjustment unit is installed on the second horizontal adjustment unit, and the recognition component is installed on the vertical adjustment unit. The first horizontal adjustment unit is used to adjust the position of the recognition component along a first horizontal direction, the second horizontal adjustment unit is used to adjust the position of the recognition component along a second horizontal direction, and the vertical adjustment unit is used to adjust the position of the recognition component along a vertical direction.

[0009] Optionally, the conveying mechanism includes a first conveying component, a second conveying component, and an adjusting component. The adjusting component is used to adjust the distance between the first conveying component and the second conveying component. The first conveying component and the second conveying component cooperate to convey the PCB board.

[0010] Optionally, the conveying assembly includes a conveying frame and a conveying drive unit, the conveying drive unit being mounted on the conveying frame, the conveying drive unit of the first conveying assembly and the conveying drive unit of the second conveying assembly cooperating to convey the PCB board, and the PCB board being located between the conveying frame of the first conveying assembly and the conveying frame of the second conveying assembly.

[0011] Optionally, the positioning mechanism includes a power component and a blocking component. The blocking component is installed at the drive end of the power component, and the power component can drive the blocking component to extend to the front end of the PCB board to position the PCB board to the measurement position.

[0012] Optionally, the PCB expansion and contraction measuring device further includes a leveling mechanism for leveling the PCB located at the measuring position.

[0013] Optionally, the leveling mechanism includes an upper pressure component, a lifting drive assembly, and an adsorption assembly. The upper pressure component is installed on the conveying mechanism and located on the upper side of the PCB board. The adsorption assembly is installed at the output end of the lifting drive assembly and located on the lower side of the PCB board. The lifting drive assembly can drive the adsorption assembly to cooperate with the upper pressure component to level the PCB board.

[0014] Optionally, the adsorption assembly includes an adsorption cavity, limiting top posts, and an air extraction unit. The adsorption cavity is installed at the output end of the lifting drive assembly, and the air extraction unit is connected to the adsorption cavity. The adsorption cavity is provided with a plurality of limiting top posts, and the upper ends of the limiting top posts are flush with the side walls of the adsorption cavity. The lifting drive assembly can drive the adsorption cavity to rise, so that the side walls of the adsorption cavity and the upper pressure member cooperate to flatten the outer edge of the PCB board. The adsorption cavity and the lower surface of the PCB board form a sealed cavity. The air extraction unit is used to extract air from the sealed cavity so that the PCB board abuts against the limiting top posts.

[0015] On the other hand, this utility model embodiment provides a PCB board production line, including the PCB board expansion and contraction measurement equipment as described above.

[0016] The PCB expansion and contraction measuring device and PCB production line provided in this embodiment of the utility model have at least the following beneficial effects compared with the prior art: When it is necessary to measure the PCB board after production, the PCB board after production is first loaded from the loading position to the conveying mechanism. Then the conveying mechanism transports the PCB board located at the loading position to the measuring position. The positioning mechanism temporarily fixes the PCB board located at the measuring position. Finally, multiple identification components identify the positions of multiple identification points one by one. Based on the obtained position information of each identification point, the distance between each identification point is determined, thereby determining the size of the PCB board. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the PCB board expansion and contraction measuring device provided in one embodiment of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the PCB board expansion and contraction measuring device provided in one embodiment of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the conveying mechanism of the PCB board expansion and contraction measuring device provided in one embodiment of the present invention;

[0021] Figure 4This is a schematic diagram of the positioning mechanism of the PCB board expansion and contraction measuring device provided in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the identification and measurement mechanism of the PCB board expansion and contraction measurement device provided in one embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the leveling mechanism of the PCB board expansion and contraction measuring device provided in one embodiment of the present invention.

[0024] The reference numerals in the accompanying drawings are as follows:

[0025] 100. PCB board expansion and contraction measuring equipment; 110. Conveying mechanism; 111. First conveying component; 112. Second conveying component; 113. Adjustment component; 114. Conveying frame; 115. Conveying drive unit; 120. Positioning mechanism; 121. Power component; 122. Blocking component; 130. Identification and measuring mechanism; 131. Identification component; 132. Adjustment component; 133. First horizontal adjustment unit; 134. Second horizontal adjustment unit; 135. Vertical adjustment unit; 140. Leveling mechanism; 141. Upper pressure component; 142. Lifting drive component; 143. Adsorption component; 144. Adsorption cavity; 145. Limiting top column; 146. Air extraction unit. Detailed Implementation

[0026] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] like Figures 1 to 6 As shown, an embodiment of the present invention provides a PCB board expansion and contraction measuring device 100, which is used to measure the size of a PCB board. The upper surface of the PCB board is provided with multiple identification points.

[0030] Please refer to the following for details. Figure 1 and Figure 2 The PCB expansion and contraction measurement device 100 includes a conveying mechanism 110, a positioning mechanism 120, and an identification and measurement mechanism 130. The conveying mechanism 110 can convey the PCB board at the loading position to the measurement position. The positioning mechanism 120 is used to temporarily fix the PCB board located at the measurement position. The identification and measurement mechanism 130 includes multiple identification components 131, which are used to identify the positions of multiple identification points one by one.

[0031] When it is necessary to measure the finished PCB board to determine the degree of expansion and contraction, the finished PCB board is first loaded from the loading position to the conveying mechanism 110. Then, the conveying mechanism 110 transports the PCB board at the loading position to the measuring position. The positioning mechanism 120 temporarily fixes the PCB board at the measuring position. Finally, multiple identification components 131 identify the positions of multiple identification points one by one. Based on the obtained position information of each identification point, the distance between each identification point is determined, thereby determining the size of the PCB board. After the measurement is completed, the positioning mechanism 120 retracts, and the conveying mechanism 110 transports the PCB board at the measuring position to the unloading position.

[0032] In this embodiment, the PCB board has a square structure, and four identification points are provided on the upper surface of the PCB board. The four identification points are located at the four corners of the PCB board. The corresponding identification and measurement mechanism 130 includes four identification components 131, which are used to identify the positions of the four identification points one by one. Based on the obtained position information of each identification point, the distance between each identification point is determined. Since the PCB board material is the same and the degree of expansion and contraction is the same, the expansion and contraction coefficient of the PCB board is calculated based on the obtained distance between each identification point and the standard distance between each identification point, thereby finally determining the overall size of the PCB board.

[0033] When it is necessary to measure the finished PCB board to determine the degree of expansion and contraction, the finished PCB board is first loaded from the loading position to the conveying mechanism 110. Then, the conveying mechanism 110 transports the PCB board at the loading position to the measuring position. The positioning mechanism 120 temporarily fixes the PCB board at the measuring position. Four identification components 131 are respectively located above the four identification points. Finally, the four identification components 131 are used to identify the position of the four identification points one by one. Based on the obtained position information of each identification point, the distance between each identification point is determined and compared with the standard size to determine the degree of expansion and contraction of the PCB board.

[0034] In a feasible specific embodiment, the identification component 131 is selected from a 2D camera. The position of the identification component 131 can be pre-adjusted according to the position of the identification points on the PCB board, so that when the PCB board is transported to the measurement position, multiple identification components 131 can identify the positions of multiple identification points one by one. The identification points can be the pads or mark points at the four corners of the PCB board. By determining the distance between each identification point, the overall size of the PCB board can be determined. At the same time, the measured products can be classified according to different sizes, such as arithmetic progression, proportional tolerance, or custom measurement range classification.

[0035] One embodiment of this utility model provides a PCB board expansion and contraction measurement device 100. Please refer to the following for details. Figure 2 The identification and measurement mechanism 130 also includes an adjustment component, on which each identification component 131 is mounted. The adjustment component is used to adjust the position of each identification component 131. Since the sizes of PCB boards differ, the positions of the identification points on the PCB boards also differ. Therefore, when measuring PCB boards of different sizes, the positions of each identification component 131 must first be adjusted in advance using the adjustment component according to the positions of the identification points on the PCB board, so that when the PCB board is transported to the measurement position, the multiple identification components 131 can identify the positions of multiple identification points one by one.

[0036] In this embodiment, please refer to the following for details. Figure 5 The adjustment assembly includes a first horizontal adjustment unit, a second horizontal adjustment unit 134, and a vertical adjustment unit 135. The second horizontal adjustment unit 134 is installed on the first horizontal adjustment unit, and the vertical adjustment unit 135 is installed on the second horizontal adjustment unit 134. The recognition component 131 is installed on the vertical adjustment unit 135. The first horizontal adjustment unit is used to adjust the position of the recognition component 131 along the first horizontal direction, the second horizontal adjustment unit 134 is used to adjust the position of the recognition component 131 along the second horizontal direction, and the vertical adjustment unit 135 is used to adjust the position of the recognition component 131 along the vertical direction.

[0037] Please refer to the following for details. Figure 5The first horizontal adjustment unit can adjust the position of the recognition component 131 along the first horizontal direction, and the second horizontal adjustment unit 134 can adjust the position of the recognition component 131 along the second horizontal direction. Through the first horizontal adjustment unit and the second horizontal adjustment unit 134, the position of the recognition component 131 relative to the PCB board on the horizontal plane can be adjusted. The vertical adjustment unit 135 can adjust the position of the recognition component 131 along the vertical direction. Through the vertical adjustment unit 135, the position of the recognition component 131 relative to the PCB board in the vertical direction can be adjusted so that the recognition component 131 can recognize the position of the corresponding recognition point.

[0038] In this embodiment, the conveying mechanism 110 can convey the PCB board at the loading position to the measuring position along the first horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction. Please refer to the following for details. Figure 5 The first horizontal adjustment unit includes a support frame, a first movable frame, and a first driving component. The support frame is provided with a first slide rail extending along a first horizontal direction. The first movable frame is slidably mounted on the first slide rail. The first driving component can drive the first movable frame to move along the first slide rail.

[0039] Please refer to the following for details. Figure 5 The second horizontal adjustment unit 134 includes a second movable frame and a second driving component. The first movable frame is provided with a second slide rail extending along the second horizontal direction. The second movable frame is slidably mounted on the second slide rail. The second driving component can drive the second movable frame to move along the second slide rail.

[0040] Please refer to the following for details. Figure 5 The vertical adjustment unit 135 includes a third movable frame and a third driving component. The second movable frame is provided with a third slide rail extending in the vertical direction. The third movable frame is slidably mounted on the third slide rail. The third driving component can drive the third movable frame to move along the third slide rail. The identification component 131 is mounted on the third movable frame.

[0041] In one specific embodiment, the driving component employs a mover and stator in conjunction with a high-precision magnetic scale for positioning. Four cameras are also used, and after calibration, errors caused by mechanical movement are reduced. Of course, it is understood that other components can also be used for the driving component, such as a motor lead screw; this is not a limitation.

[0042] One embodiment of this utility model provides a PCB board expansion and contraction measurement device 100. Please refer to the following for details. Figure 3 The conveying mechanism 110 includes a first conveying component 111, a second conveying component 112, and an adjusting component 113. The adjusting component 113 is used to adjust the distance between the first conveying component 111 and the second conveying component 112. The first conveying component 111 and the second conveying component 112 cooperate to convey the PCB board.

[0043] Since the widths of the PCBs being transported vary, the spacing between the first transport component 111 and the second transport component 112 needs to be adjusted according to the width of the PCBs being transported in order to accommodate the PCBs being transported.

[0044] In this embodiment, please refer to the following for details. Figure 3 The first conveying component 111 is fixedly installed. The adjusting component 113 can drive the second conveying component 112 to move closer to or away from the first conveying component 111. The adjusting component 113 adopts a structure of a drive motor and a lead screw. The drive motor drives the lead screw to rotate, and the lead screw drives the second conveying component 112 to move closer to or away from the first conveying component 111.

[0045] Please refer to the following for details. Figure 3 The conveying assembly includes a conveying frame 114 and a conveying drive unit 115. The conveying drive unit 115 is mounted on the conveying frame 114. The conveying drive unit 115 of the first conveying assembly 111 and the conveying drive unit 115 of the second conveying assembly 112 cooperate to convey the PCB board, and the PCB board is limited to the conveying frame 114 of the first conveying assembly 111 and the conveying frame 114 of the second conveying assembly 112.

[0046] In a specific embodiment, please refer to the following. Figure 3 The conveying drive unit 115 includes a conveying motor, a drive wheel, a driven wheel, and a conveying belt. The drive wheel and the driven wheel are respectively installed at intervals along the first horizontal direction on the conveying frame 114. The conveying motor is used to drive the drive wheel to rotate. The conveying belt is sleeved on the drive wheel and the driven wheel. The conveying belt is located on the side of the conveying frame 114 close to the other conveying frame 114, and the upper surface of the conveying belt is lower than the upper surface of the conveying frame 114.

[0047] When the conveying components transport the PCB board, the opposite sides of the PCB board are supported and placed on the upper surfaces of the two conveyor belts. The conveyor frame 114 of the first conveying component 111 and the conveyor frame 114 of the second conveying component 112 limit the opposite sides of the PCB board to ensure that the PCB board is always transported along the first horizontal direction.

[0048] In this embodiment, please refer to the following for details. Figure 4 The positioning mechanism 120 includes a power component 121 and a blocking component 122. The blocking component 122 is installed on the drive end of the power component 121. The power component 121 can drive the blocking component 122 to extend to the front end of the PCB board to position the PCB board to the measurement position.

[0049] When it is necessary to measure the finished PCB board to determine the degree of expansion and contraction, the finished PCB board is first loaded from the loading position to the conveying mechanism 110. The power component 121 drives the blocking component 122 to extend to the front end of the PCB board. Then, the conveying mechanism 110 transports the PCB board at the loading position to the measurement position. The blocking component 122 positions the PCB board at the measurement position. Finally, multiple identification components 131 identify the positions of multiple identification points one by one. Based on the obtained position information of each identification point, the distance between each identification point is determined, thereby determining the size of the PCB board. After the measurement is completed, the power component 121 drives the blocking component 122 to retract, and the conveying mechanism 110 transports the PCB board at the measurement position to the unloading position.

[0050] In one specific embodiment, the power component 121 is driven by a drive cylinder, a drive hydraulic cylinder, or a linear motor, etc., and is not limited here.

[0051] One embodiment of this utility model provides a PCB board expansion and contraction measurement device 100. Please refer to the following for details. Figure 1 and Figure 2 The PCB expansion and contraction measuring device 100 also includes a leveling mechanism 140, which is used to level the PCB located at the measuring position.

[0052] Since finished PCB boards may have warped edges, protrusions, or concavities, in order to make the position of the identification points more accurate, a leveling mechanism 140 needs to be used to level the PCB board located at the measurement position before identification. This ensures that the PCB board is flat, and then the identification points on the PCB board are identified. This allows for more accurate measurement of the PCB board dimensions and avoids the influence of warped edges, protrusions, or concavities on the measurement results.

[0053] In this embodiment, please refer to the following for details. Figure 3 and Figure 6 The leveling mechanism 140 includes an upper pressure component 141, a lifting drive assembly 142, and an adsorption assembly 143. The upper pressure component 141 is installed on the conveying mechanism 110 and located on the upper side of the PCB board. The adsorption assembly 143 is installed at the output end of the lifting drive assembly 142 and located on the lower side of the PCB board. The lifting drive assembly 142 can drive the adsorption assembly 143 to cooperate with the upper pressure component 141 to level the PCB board.

[0054] When it is necessary to measure the finished PCB board to determine the degree of expansion and contraction, the finished PCB board is first loaded from the loading position to the conveying mechanism 110. The power component 121 drives the blocking component 122 to extend to the front end of the PCB board. Then, the conveying mechanism 110 transports the PCB board at the loading position to the measuring position. The blocking component 122 positions the PCB board at the measuring position. Then, the lifting drive component 142 drives the adsorption component 143 to cooperate with the upper pressure component 141 to flatten the PCB board. Finally, multiple recognition components 131 identify the positions of multiple recognition points one by one. Based on the obtained position information of each recognition point, the distance between each recognition point is determined, thereby determining the size of the PCB board. After the measurement is completed, the power component 121 drives the blocking component 122 to retract, and the conveying mechanism 110 transports the PCB board at the measuring position to the unloading position.

[0055] In a specific embodiment, please refer to the following. Figure 6 The adsorption assembly 143 includes an adsorption chamber 144, a limiting top post 145, and an air extraction unit 146. The adsorption chamber 144 is installed at the output end of the lifting drive assembly 142. The air extraction unit 146 is connected to the adsorption chamber 144. The adsorption chamber 144 is provided with multiple limiting top posts 145, and the upper end of the limiting top post 145 is flush with the side wall of the adsorption chamber 144. The lifting drive assembly 142 can drive the adsorption chamber 144 to rise, so that the side wall of the adsorption chamber 144 and the upper pressure member 141 cooperate to press and flatten the outer edge of the PCB board. The adsorption chamber 144 and the lower surface of the PCB board form a sealed cavity. The air extraction unit 146 is used to extract air from the sealed cavity so that the PCB board abuts against the limiting top post 145.

[0056] The conveying mechanism 110 conveys the PCB board located at the loading position to the measuring position. When the blocking member 122 positions the PCB board to the measuring position, the lifting drive assembly 142 can drive the adsorption cavity 144 to rise, so that the side wall of the adsorption cavity 144 and the upper pressure member 141 cooperate to squeeze and flatten the outer edge of the PCB board, so that the edge position of the PCB board is flat. The adsorption cavity 144 and the lower surface of the PCB board form a sealed cavity. The air extraction unit 146 extracts air from the sealed cavity, so that the PCB board abuts against the limiting top post 145, so that the interior of the PCB board is flat, thereby flattening the entire PCB board.

[0057] In addition, such as Figures 1 to 6 As shown, another embodiment of this utility model provides a PCB board production line, which includes a PCB board expansion and contraction measuring device 100 as provided in any of the above embodiments. The specific structure of the PCB board expansion and contraction measuring device 100 is the same as described in the above embodiments. Since this PCB board production line adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A PCB board expansion and contraction measuring device for measuring the dimensions of a PCB board, wherein the upper surface of the PCB board is provided with multiple identification points, characterized in that... It includes a conveying mechanism, a positioning mechanism, and an identification and measurement mechanism. The conveying mechanism can transport the PCB board from the loading position to the measurement position. The positioning mechanism is used to temporarily fix the PCB board located at the measurement position. The identification and measurement mechanism includes multiple identification components, which are used to identify the positions of multiple identification points one by one.

2. The PCB board expansion and contraction measuring device according to claim 1, characterized in that, The identification and measurement mechanism further includes an adjustment component, on which each identification component is mounted, and the adjustment component is used to adjust the position of each identification component.

3. The PCB board expansion and contraction measuring device according to claim 2, characterized in that, The adjustment assembly includes a first horizontal adjustment unit, a second horizontal adjustment unit, and a vertical adjustment unit. The second horizontal adjustment unit is installed on the first horizontal adjustment unit, the vertical adjustment unit is installed on the second horizontal adjustment unit, and the recognition component is installed on the vertical adjustment unit. The first horizontal adjustment unit is used to adjust the position of the recognition component along a first horizontal direction, the second horizontal adjustment unit is used to adjust the position of the recognition component along a second horizontal direction, and the vertical adjustment unit is used to adjust the position of the recognition component along a vertical direction.

4. The PCB board expansion and contraction measuring device according to claim 1, characterized in that, The conveying mechanism includes a first conveying component, a second conveying component, and an adjusting component. The adjusting component is used to adjust the distance between the first conveying component and the second conveying component. The first conveying component and the second conveying component cooperate to convey the PCB board.

5. The PCB board expansion and contraction measuring device according to claim 4, characterized in that, The conveying assembly includes a conveying frame and a conveying drive unit. The conveying drive unit is mounted on the conveying frame. The conveying drive unit of the first conveying assembly and the conveying drive unit of the second conveying assembly cooperate to convey the PCB board, and the PCB board is located between the conveying frame of the first conveying assembly and the conveying frame of the second conveying assembly.

6. The PCB board expansion and contraction measuring device according to claim 1, characterized in that, The positioning mechanism includes a power component and a blocking component. The blocking component is installed on the drive end of the power component, and the power component can drive the blocking component to extend to the front end of the PCB board to position the PCB board to the measurement position.

7. The PCB board expansion and contraction measuring device according to claim 1, characterized in that, The PCB board expansion and contraction measuring device also includes a leveling mechanism, which is used to level the PCB board located at the measuring position.

8. The PCB board expansion and contraction measuring device according to claim 7, characterized in that, The leveling mechanism includes an upper pressure component, a lifting drive assembly, and an adsorption assembly. The upper pressure component is installed on the conveying mechanism and located on the upper side of the PCB board. The adsorption assembly is installed at the output end of the lifting drive assembly and located on the lower side of the PCB board. The lifting drive assembly can drive the adsorption assembly to cooperate with the upper pressure component to level the PCB board.

9. The PCB board expansion and contraction measuring device according to claim 8, characterized in that, The adsorption assembly includes an adsorption cavity, limiting top posts, and an air extraction unit. The adsorption cavity is installed at the output end of the lifting drive assembly. The air extraction unit is connected to the adsorption cavity. The adsorption cavity is provided with multiple limiting top posts, and the upper ends of the limiting top posts are flush with the side walls of the adsorption cavity. The lifting drive assembly can drive the adsorption cavity to rise, so that the side walls of the adsorption cavity and the upper pressure member cooperate to flatten the outer edge of the PCB board. The adsorption cavity and the lower surface of the PCB board form a sealed cavity. The air extraction unit is used to extract air from the sealed cavity so that the PCB board abuts against the limiting top posts.

10. A PCB production line, characterized in that, Includes the PCB board expansion and contraction measurement device as described in any one of claims 1 to 9.

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