Component mounting device and determination method

Abstract

A component mounting device (10) mounts a component to a substrate (1), and comprises: a suction nozzle (24) that has a suction surface (26) for suctioning the component; an imaging unit (32) that images the suction surface (26); and an evaluation unit (42) that evaluates a wear condition of the suction surface (26) on the basis of an image imaged by the imaging unit (32).

Description

Technical Field

[0001] The present disclosure relates to a component mounting device and a determination method.

Background Art

[0002] Conventionally, a component mounting device for mounting components on a substrate has been known. As an example of a component mounting device, Patent Document 1 discloses an electronic component mounting device that takes out an electronic component from a component supply unit by a suction nozzle and transfers and mounts it on a substrate held by a substrate holding unit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the electronic component mounting device of Patent Document 1, it is not assumed to determine the wear state of the suction surface of the suction nozzle.

[0005] Therefore, the present disclosure provides a component mounting device and the like that can determine the wear state of the suction surface.

Means for Solving the Problems

[0006] A component mounting device according to an aspect of the present disclosure is a component mounting device for mounting components on a substrate, including a suction nozzle having a suction surface for sucking the components, an imaging unit for imaging the suction surface, and a determination unit for determining the wear state of the suction surface based on an image captured by the imaging unit.

[0007] Furthermore, a determination method according to one aspect of the present disclosure is a determination method in a component mounting device for mounting components onto a substrate, wherein the component mounting device includes an adsorption nozzle having an adsorption surface for adsorbing the components, and includes an imaging step for imaging the adsorption surface, and a determination step for determining the wear state of the adsorption surface based on the image captured in the imaging step.

[0008] These comprehensive or specific embodiments may be implemented as a system, method, integrated circuit, computer program, or recording medium such as a computer-readable CD-ROM, or as any combination of a system, method, integrated circuit, computer program, and recording medium. Furthermore, the recording medium may be a non-temporary recording medium. [Effects of the Invention]

[0009] The component mounting device, etc., of this disclosure can determine the wear condition of the suction surface.

[0010] Further advantages and effects of one aspect of this disclosure will be made apparent from the specification and drawings. Such advantages and / or effects are provided by several embodiments and features described in the specification and drawings, but not all of them are necessarily provided in order to obtain one or more identical features. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a plan view showing a component mounting device according to an embodiment. [Figure 2] Figure 2 is a front view showing the component mounting section of the component mounting device shown in Figure 1. [Figure 3] Figure 3 is a bottom view showing the suction surface of the suction nozzle of the component mounting section shown in Figure 2. [Figure 4] Figure 4 is a front view showing the cleaning section of the component mounting device shown in Figure 1. [Figure 5] Figure 5 is a block diagram showing the functional configuration of the component mounting device shown in Figure 1. [Figure 6]FIG. 6 is a flowchart showing an operation example 1 of the component mounting apparatus of FIG. 1. [Figure 7] FIG. 7 is a diagram showing an example of an image captured by the imaging unit of the component mounting apparatus of FIG. 1. [Figure 8] FIG. 8 is a graph showing an example of luminance values acquired by the component mounting apparatus of FIG. 1 at a plurality of time points. [Figure 9] FIG. 9 is a flowchart showing an operation example 2 of the component mounting apparatus of FIG. 1. [Figure 10] FIG. 10 is a flowchart showing an operation example 3 of the component mounting apparatus of FIG. 1. [Figure 11] FIG. 11 is a graph showing an example of luminance values acquired by the component mounting apparatus of FIG. 1 at a plurality of time points.

Embodiments for Carrying out the Invention

[0012] In order to solve the above problems, a component mounting apparatus according to an aspect of the present disclosure is a component mounting apparatus that mounts components on a substrate, and includes a suction nozzle having a suction surface for sucking the component, an imaging unit for imaging the suction surface, and a determination unit for determining the wear state of the suction surface based on an image captured by the imaging unit.

[0013] According to this, the wear state of the suction surface can be determined based on the image captured by the imaging unit.

[0014] Further, in the component mounting apparatus according to an aspect of the present disclosure, the determination unit may determine the wear state of the suction surface by determining whether or not the luminance value of the suction surface in the image captured by the imaging unit is equal to or greater than a first threshold value.

[0015] According to this, the wear state of the suction surface can be easily determined by determining whether or not the luminance value of the suction surface in the image is equal to or greater than the first threshold value.

[0016] Also, in the component mounting device according to one aspect of the present disclosure, the determination unit may determine the wear state of the suction surface based on the image captured by the imaging unit after the suction surface is cleaned and before the component is adsorbed on the suction surface.

[0017] According to this, since the wear state can be determined based on the image captured by the imaging unit after removing dirt and the like adhering to the suction surface, the wear state of the suction surface can be determined more accurately.

[0018] Further, the component mounting device according to one aspect of the present disclosure further includes a cleaning unit that cleans the suction surface, and the cleaning unit may clean the suction surface when it is determined that the luminance value is equal to or greater than the first threshold value.

[0019] According to this, since the suction surface can be cleaned when dirt or the like adheres to the suction surface and the luminance value becomes equal to or greater than the first threshold value, it is possible to suppress the situation where the luminance value becomes equal to or greater than the first threshold value due to dirt or the like adhering to the suction surface and the wear state of the suction surface is erroneously determined. Therefore, the wear state of the suction surface can be determined more accurately.

[0020] Further, the component mounting device according to one aspect of the present disclosure may further include a notification unit that notifies an error when it is determined that the luminance value in the image captured by the imaging unit after the suction surface is cleaned and before the component is adsorbed on the suction surface is equal to or greater than the first threshold value.

[0021] According to this, when it is determined that the luminance value in the image captured by the imaging unit after the suction surface is cleaned and before the component is adsorbed on the suction surface is equal to or greater than the first threshold value, there is a high possibility that the suction surface is worn. Therefore, by notifying an error in such a case, it is possible to suppress mounting a component on a substrate using a suction nozzle in a worn state.

[0022] Further, the component mounting device according to one aspect of the present disclosure may further include a prediction unit that predicts the arrival time when the luminance value reaches the first threshold value based on a plurality of the luminance values acquired at a plurality of past time points.

[0023] According to this, the timing at which the brightness value reaches the first threshold can be predicted, making it easier to replace the suction nozzle before the brightness value reaches the first threshold, and further suppressing the use of a suction nozzle with a worn suction surface to attach components to the substrate.

[0024] Furthermore, in a component mounting device according to one aspect of the present disclosure, the prediction unit may predict the arrival time based on two luminance values ​​acquired at the two most recent of the plurality of time points.

[0025] According to this, the time when the brightness value reaches the first threshold can be easily predicted, making it easier to replace the suction nozzle before the brightness value reaches the first threshold, and further suppressing the use of a suction nozzle with a worn suction surface to attach components to the substrate.

[0026] Furthermore, a component mounting device according to one aspect of the present disclosure may further include an output unit that outputs warning information when it is determined that the arrival period from the most recent of the multiple time points to the arrival time is less than the first period.

[0027] According to this, warning information can be displayed when the time until the brightness value reaches the first threshold is short, making it easier to replace the suction nozzle before the brightness value reaches the first threshold, and further suppressing the use of a suction nozzle with a worn suction surface to attach components to the substrate.

[0028] Furthermore, in a component mounting device according to one aspect of the present disclosure, the output unit may output period information indicating the arrival period if it is determined that the arrival period is equal to or greater than the first period and less than a second period that is longer than the first period.

[0029] This allows us to determine the time it takes for the brightness value to reach the first threshold, making it easier to replace the suction nozzle before the brightness value reaches the first threshold, and further reducing the use of suction nozzles with worn suction surfaces to attach components to the substrate.

[0030] Furthermore, in a component mounting device according to one aspect of the present disclosure, the determination unit may further include an output unit that, if it is determined that the brightness value is not equal to or greater than the first threshold, determines whether the brightness value is equal to or greater than a second threshold that is less than the first threshold, and outputs warning information if it is determined that the brightness value is not equal to or greater than the first threshold and is equal to or greater than the second threshold.

[0031] According to this, a warning message can be output when the brightness value exceeds a second threshold, which is lower than the first threshold. This makes it easier to replace the suction nozzle before the brightness value reaches the first threshold, and further reduces the use of a suction nozzle with a worn suction surface to attach components to the substrate.

[0032] Furthermore, in order to solve the above-mentioned problems, a determination method according to one aspect of the present disclosure is a determination method for a component mounting device that mounts a component to a substrate, wherein the component mounting device includes an adsorption nozzle having an adsorption surface for adsorbing the component, and includes an imaging step of imaging the adsorption surface, and a determination step of determining the wear state of the adsorption surface based on the image captured in the imaging step.

[0033] According to this, it will have the same effect as the component mounting device described above.

[0034] The embodiments will be described in detail below with reference to the drawings.

[0035] The embodiments described below are all general or specific examples. The numerical values, shapes, materials, components, arrangement and connection configurations of components, steps, and the order of steps shown in the following embodiments are examples only and are not intended to limit this disclosure. Furthermore, among the components in the following embodiments, those not described in the independent claim representing the highest-level concept will be described as optional components.

[0036] Furthermore, each figure is a schematic diagram and not necessarily a strictly accurate representation. Also, the same reference numeral is used for the same component in each figure.

[0037] (Embodiment) Figure 1 is a plan view showing a component mounting device 10 according to an embodiment. Figure 2 is a front view showing the component mounting section 22 of the component mounting device 10 in Figure 1. Figure 3 is a bottom view showing the suction surface 26 of the suction nozzle 24 of the component mounting section 22 in Figure 2. Figure 4 is a front view showing the cleaning section 34, etc., of the component mounting device 10 in Figure 1. The configuration of the component mounting device 10 will be described with reference to Figures 1 to 4.

[0038] As shown in Figure 1, the component mounting device 10 comprises a base 12, a transport unit 14, a pair of Y-axis tables 16, a pair of X-axis tables 18, a plurality of component supply units 20, a plurality of component mounting units 22, a plurality of imaging units 32, and a plurality of cleaning units 34. The component mounting device 10 is a device for mounting components (not shown) onto a substrate 1. For example, the components mounted on the substrate 1 are electronic components.

[0039] The transport unit 14 is provided on the base 12 and transports the substrate 1. In this embodiment, the transport unit 14 transports the substrate 1 in the X-axis direction while positioning it in the Y-axis direction. For example, the transport unit 14 is a conveyor. Each of the pair of Y-axis tables 16 is attached to the base 12, and each of the pair of X-axis tables 18 is attached to the pair of Y-axis tables 16.

[0040] Multiple component supply units 20 are provided on both sides of the base 12, and each of the multiple component supply units 20 supplies components to be mounted on the substrate 1. For example, each of the multiple component supply units 20 has multiple tape feeders and supplies components by feeding a carrier tape holding the components in a pitch.

[0041] Each of the multiple component mounting units 22 mounts components supplied from the corresponding component supply unit 20 onto the substrate 1. Each of the multiple component mounting units 22 is attached to the X-axis table 18. Each of the multiple component mounting units 22 moves in the Y-axis direction together with the X-axis table 18 by a pair of Y-axis tables 16, and moves in the X-axis direction by the X-axis table 18.

[0042] As shown in Figure 2, the component mounting section 22 has a plurality of suction nozzles 24 and a substrate recognition camera 30. Each of the plurality of suction nozzles 24 has a suction surface 26 for adsorbing components. As shown in Figure 3, for example, a suction port 28 for drawing in air is formed on the suction surface 26, and components are adsorbed onto the suction surface 26 by drawing in air from the suction port 28. As shown in Figure 2, the substrate recognition camera 30 is positioned to image the area below the component mounting section 22 and images the substrate 1 from above in order to recognize the mounting position of components on the substrate 1.

[0043] As shown in Figure 1, each of the multiple imaging units 32 images the suction surface 26. In this embodiment, each of the multiple imaging units 32 is provided between the transport unit 14 and the parts supply unit 20, and images the suction surface 26 from below as the suction nozzle 24 passes between the transport unit 14 and the parts supply unit 20. Note that each of the multiple imaging units 32 only needs to be provided in a position where it can image the suction surface 26.

[0044] Each of the multiple cleaning units 34 cleans the suction surface 26. As shown in Figure 4, for example, the cleaning unit 34 has a fine brush 36, and cleans the suction surface 26 by vibrating the brush 36 while it is in contact with the suction surface 26. Alternatively, for example, the cleaning unit 34 may have a grinding wheel, and clean the suction surface 26 by vibrating the grinding wheel while it is in contact with the suction surface 26.

[0045] The configuration of the component mounting device 10 has been described above.

[0046] Figure 5 is a block diagram showing the functional configuration of the component mounting device 10 in Figure 1. The functional configuration of the component mounting device 10 will be explained with reference to Figure 5.

[0047] As shown in Figure 5, the component mounting device 10 further comprises a drive unit 38, a storage unit 40, a determination unit 42, a prediction unit 44, an output unit 46, and a notification unit 48.

[0048] The drive unit 38 moves the component mounting unit 22 to a predetermined position by driving the Y-axis table 16 and the X-axis table 18. The drive unit 38 also moves the suction nozzle 24 of the component mounting unit 22 up and down to pick up components and mount them onto the substrate 1.

[0049] The memory unit 40 stores operation programs for mounting components onto the circuit board 1, and programs necessary for the determination process performed by the determination unit 42. The memory unit 40 also stores coordinate data indicating the mounting position of components on the circuit board 1.

[0050] The determination unit 42 determines the wear state of the adhesive surface 26 based on the image captured by the imaging unit 32. In this embodiment, the determination unit 42 obtains the brightness value of the adhesive surface 26 in the image by analyzing the image captured by the imaging unit 32, and determines the wear state of the adhesive surface 26 based on the brightness value of the adhesive surface 26 in the image. Generally, the more the adhesive surface 26 wears, the more easily light is scattered by the adhesive surface 26, and the higher the brightness value of the adhesive surface 26 in the image. Therefore, the determination unit 42 can determine that the adhesive surface 26 is worn the higher the brightness value of the adhesive surface 26 in the image captured by the imaging unit 32. In the following description, the brightness value of the adhesive surface 26 in the image captured by the imaging unit 32 may be simply referred to as the brightness value.

[0051] The determination unit 42 determines the wear state of the adhesive surface 26 by determining whether the brightness value of the adhesive surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold. Specifically, for example, the determination unit 42 determines whether the maximum, minimum, or average brightness value of the adhesive surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold.

[0052] For example, the first threshold is a predetermined threshold. For example, the first threshold is the brightness value of the suction surface 26 in the image captured by the imaging unit 32 when the suction surface 26 is worn to the point that the component cannot be properly attached to the substrate 1. Specifically, for example, the first threshold is the maximum, minimum, or average brightness value of the suction surface 26 in the image captured by the imaging unit 32 when the suction surface 26 is worn to the point that the component cannot be properly attached to the substrate 1. In this case, the determination unit 42 can determine that the suction surface 26 is worn to the point that the component cannot be properly attached to the substrate 1 if the brightness value of the suction surface 26 in the image captured by the imaging unit 32 is equal to or greater than the first threshold. On the other hand, the determination unit 42 can determine that the suction surface 26 is not worn to the point that the component cannot be properly attached to the substrate 1 if the brightness value of the suction surface 26 in the image captured by the imaging unit 32 is not equal to or greater than the first threshold.

[0053] The determination unit 42 determines the wear state of the suction surface 26 based on the image captured by the imaging unit 32 after the suction surface 26 has been cleaned and before a component is attached to the suction surface 26. Specifically, for example, the determination unit 42 determines the wear state of the suction surface 26 based on the image captured by the imaging unit 32 after the suction surface 26 has been cleaned by the cleaning unit 34 and before a component is attached to the suction surface 26. For example, if the suction surface 26 is imaged with deposits such as solder attached to it, the deposits will reflect light more easily, and the brightness value of the suction surface 26 in the image will increase. Therefore, even if the suction surface 26 is not worn, the brightness value of the suction surface 26 in the image may increase due to the presence of deposits on the suction surface 26.

[0054] Therefore, by imaging the suction surface 26 with the imaging unit 32 after the suction surface 26 has been cleaned by the cleaning unit 34 and before a part is attached to the suction surface 26, the brightness value of the suction surface 26 in a state where no attached material is present can be obtained, allowing the determination unit 42 to determine the wear state of the suction surface 26 with greater accuracy. For example, the determination unit 42 may determine the wear state based on an image captured by the imaging unit 32 before the suction surface 26 is cleaned by the cleaning unit 34. Also, for example, the cleaning of the suction surface 26 may be performed by the cleaning unit 34 or by a person.

[0055] For example, the cleaning unit 34 cleans the suction surface 26 if it determines that the brightness value of the suction surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold. Also, for example, the cleaning unit 34 does not clean the suction surface 26 if it determines that the brightness value of the suction surface 26 in the image captured by the imaging unit 32 is not equal to or greater than a first threshold. The determination of whether or not the brightness value of the suction surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold may be performed by the determination unit 42 or by a unit other than the determination unit 42.

[0056] The prediction unit 44 predicts when the brightness value will reach a first threshold based on multiple brightness values ​​acquired at multiple past points in time. For example, the prediction unit 44 predicts the arrival time based on two brightness values ​​acquired at the two most recent points in time among multiple points in time. For example, the two most recent points in time are the most recent point in time prior to the current time and the most recent point in time prior to that point in time among multiple past points in time. Details of the method by which the prediction unit 44 predicts the arrival time will be described later. Note that the determination of whether the brightness value of the adsorption surface 26 in the image captured by the imaging unit 32 is equal to or greater than the first threshold may be performed by the determination unit 42 or by a unit other than the determination unit 42.

[0057] The output unit 46 outputs warning information if it determines that the arrival period from the most recent point in time among several past points in time to the arrival time is less than the first period. For example, the first period is a predetermined period. Also, for example, the most recent point in time is the most recent point in time among several past points in time that is prior to the current time. For example, the output unit 46 outputs the warning information by displaying the warning information on a display screen (not shown). Note that the determination of whether the arrival period is less than the first period may be performed by the determination unit 42 or by a unit other than the determination unit 42.

[0058] The notification unit 48 notifies an error if it determines that the brightness value of the suction surface 26 in the image captured by the imaging unit 32 after the suction surface 26 has been cleaned by the cleaning unit 34 and before a component is attached to the suction surface 26 is equal to or greater than a first threshold. In other words, for example, the notification unit 48 notifies an error if it determines that the suction surface 26 is worn to the point that the component cannot be properly attached to the substrate 1. For example, the notification unit 48 notifies an error by displaying error information on a display screen (not shown). The determination of whether or not the brightness value of the suction surface 26 in the image captured by the imaging unit 32 is equal to or greater than the first threshold may be performed by the determination unit 42 or by a unit other than the determination unit 42.

[0059] The functional configuration of the component mounting device 10 has been described above.

[0060] Figure 6 is a flowchart illustrating Operation Example 1 of the component mounting device 10 shown in Figure 1. Figure 7 is a diagram showing an example of an image captured by the imaging unit 32 of the component mounting device 10 shown in Figure 1. Figure 8 is a graph showing an example of brightness values ​​acquired by the component mounting device 10 shown in Figure 1 at multiple time points. Operation Example 1 of the component mounting device 10 will be explained with reference to Figures 6 to 8.

[0061] As shown in Figure 6, first, the imaging unit 32 images the suction surface 26 (step S1). Here, for example, the imaging unit 32 images the suction surface 26 of the suction nozzle 24, which is in a new state and has not yet picked up any parts.

[0062] When the imaging unit 32 images the adsorption surface 26, the determination unit 42 acquires the brightness value of the adsorption surface 26 in the image captured by the imaging unit 32 (step S2). For example, the determination unit 42 acquires the brightness value for each pixel constituting the image by performing image analysis on the image.

[0063] When the determination unit 42 acquires the brightness value of the suction surface 26, the component mounting device 10 starts production (step S3). Specifically, the component mounting device 10 starts mounting components onto the substrate 1.

[0064] When the component mounting device 10 starts production, the imaging unit 32 images the suction surface 26 at a predetermined timing (imaging step) (step S4). For example, the imaging unit 32 may image the suction surface 26 when all components have been mounted onto one substrate 1, or it may image the suction surface 26 each time a component that has been adsorbed onto the suction surface 26 is mounted onto the substrate 1, or it may image the suction surface 26 when a predetermined number of components have been adsorbed onto the suction surface 26. In addition, for example, the imaging unit 32 may change the timing of imaging the suction surface 26 depending on the hardness of the components.

[0065] When the imaging unit 32 images the adsorption surface 26, the determination unit 42 acquires the brightness value of the adsorption surface 26 in the image captured by the imaging unit 32 (step S5). For example, as shown in Figure 7, the determination unit 42 acquires the brightness value of the adsorption surface 26 in the image 50 captured by the imaging unit 32. Specifically, for example, the determination unit 42 acquires the brightness value for each pixel (not shown) that makes up the image 50 by performing image analysis on the image 50.

[0066] As shown in Figure 6, once the determination unit 42 acquires the luminance value of the adsorption surface 26, the prediction unit 44 analyzes the trend of the luminance value (step S6). Specifically, for example, the prediction unit 44 predicts the time when the luminance value will reach a first threshold based on multiple luminance values ​​acquired at multiple past points in time. Also, for example, the prediction unit 44 predicts the time from the most recent point in time among the multiple past points in time to the time when the threshold will be reached.

[0067] As shown in Figure 8, for example, if the current time is T7 and the first threshold is L3, the prediction unit 44 predicts T8, the time when the brightness value reaches L3, based on two brightness values ​​L1 and L2 obtained at the two most recent time points T6 and T7 among multiple past time points T1 to T7. Specifically, for example, the prediction unit 44 defines T8 as the time of the intersection of the line obtained by extending the line segment connecting the point (time, brightness value) = (T6, L1) and the point (time, brightness value) = (T7, L2) and the line with brightness value = L3, and sets T8 as the predicted arrival time. Alternatively, for example, the prediction unit 44 defines (T8-T7) as the arrival period from T7, the most recent time point among multiple past time points T1 to T7, to the arrival time T8, and sets (T8-T7) as the predicted arrival period.

[0068] As shown in Figure 6, when the prediction unit 44 analyzes the trend of the brightness value, the determination unit 42 determines whether the brightness value of the adsorption surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold (determination step) (step S7). In this way, the determination unit 42 determines the wear state of the adsorption surface 26 by determining whether the brightness value of the adsorption surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold. For example, in step S7, the determination unit 42 determines whether the brightness value acquired in step S5 is equal to or greater than a first threshold.

[0069] If the determination unit 42 determines that the luminance value is not equal to or greater than the first threshold (No in step S7), the determination unit 42 determines whether the time it takes for the luminance value to reach the first threshold is less than the first period (step S8). In other words, the determination unit 42 determines whether the time it takes for the luminance value to reach the first threshold is less than or equal to the first period. For example, in step S8, the determination unit 42 determines whether the time it takes for the luminance value to reach the first threshold is less than the first period.

[0070] If the determination unit 42 determines that the arrival period is less than the first period (Yes in step S8), the output unit 46 outputs warning information (step S9). For example, the output unit 46 outputs the warning information by displaying it on the display screen.

[0071] If the determination unit 42 determines that the arrival period is not less than the first period (No in step S8), and if the output unit 46 outputs warning information (step S9), the determination unit 42 determines whether or not planned production has been completed (step S10). For example, if the number of substrates 1 to be produced is predetermined, the determination unit 42 determines that planned production has been completed if the predetermined number of substrates 1 have been produced, and determines that planned production has not been completed if the predetermined number of substrates 1 have not been produced.

[0072] If the determination unit 42 determines that the planned production has not been completed (No in step S10), the imaging unit 32 images the suction surface 26 again at a predetermined timing (imaging step) (step S4).

[0073] If the determination unit 42 determines that the brightness value is equal to or greater than the first threshold (Yes in step S7), and if the determination unit 42 determines that planned production has ended (Yes in step S10), the component mounting device 10 terminates production (step S11). Specifically, the component mounting device 10 terminates the mounting of components onto the substrate 1.

[0074] When the parts mounting device 10 finishes production, the cleaning unit 34 cleans the suction surface 26 (step S12). For example, as described above, the cleaning unit 34 cleans the suction surface 26 with a brush 36.

[0075] When the suction surface 26 is cleaned by the cleaning unit 34, the imaging unit 32 images the suction surface 26 (imaging step) (step S13), and the determination unit 42 obtains the brightness value of the suction surface 26 in the image captured by the imaging unit 32 (step S14).

[0076] When the determination unit 42 acquires the brightness value of the adsorption surface 26, the prediction unit 44 analyzes the trend of the brightness value (step S15). Specifically, for example, the prediction unit 44 predicts when the brightness value will reach a first threshold based on multiple brightness values ​​acquired at multiple past points in time. Also, for example, the prediction unit 44 predicts the time from the most recent point in time among the multiple past points in time to the time of arrival.

[0077] When the prediction unit 44 analyzes the trend of the brightness values, the determination unit 42 determines whether the brightness value of the adsorption surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold (determination step) (step S16). For example, in step S16, the determination unit 42 determines whether the brightness value acquired in step S14 is equal to or greater than a first threshold.

[0078] If the determination unit 42 determines that the luminance value is not equal to or greater than the first threshold (No in step S16), the determination unit 42 determines whether the time it takes for the luminance value to reach the first threshold is less than the first period, that is, whether the time it takes to reach the threshold is less than or equal to the first period (step S17). For example, in step S17, the determination unit 42 determines whether the time it takes to reach the threshold, as predicted by the prediction unit 44 in step S15, is less than the first period.

[0079] If the determination unit 42 determines that the arrival period is less than the first period (Yes in step S17), the output unit 46 outputs warning information (step S18). For example, the output unit 46 outputs the warning information by displaying it on the display screen.

[0080] If the determination unit 42 determines that the arrival period is not less than the first period (No in step S17), and if the output unit 46 outputs warning information (step S18), the component mounting device 10 restarts production (step S3).

[0081] If the determination unit 42 determines that the brightness value is equal to or greater than the first threshold (Yes in step S16), the output unit 46 outputs replacement instruction information instructing the replacement of the suction nozzle 24 (step S19). For example, the output unit 46 outputs the replacement instruction information by displaying it on the display screen.

[0082] The above describes example 1 of the operation of the component mounting device 10.

[0083] Figure 9 is a flowchart showing example 2 of the operation of the component mounting device 10 in Figure 1. Example 2 of the operation of the component mounting device 10 will be explained with reference to Figure 9.

[0084] As shown in Figure 9, Operation Example 2 differs from Operation Example 1 mainly in that it includes the processing in steps S20 and S21. The differences from Operation Example 1 will be explained below.

[0085] If the determination unit 42 determines that the arrival period is not less than the first period (No in step S17), it determines whether the arrival period is less than the second period (step S20). For example, as shown in Figure 8, the second period is a longer period than the first period and is set in advance.

[0086] As shown in Figure 9, if the determination unit 42 determines that the arrival period is less than the second period (Yes in step S20), the output unit 46 outputs period information indicating the arrival period (step S21). In this way, the output unit 46 outputs period information indicating the arrival period if it determines that the arrival period is greater than or equal to the first period and less than the second period which is longer than the first period. For example, the output unit 46 outputs the period information by displaying the period information indicating the arrival period on the display screen. Note that the determination of whether or not the arrival period is less than the second period may be performed by the determination unit 42 or by a unit other than the determination unit 42.

[0087] If the determination unit 42 determines that the arrival period is not less than the second period (No in step S20), and if the output unit 46 outputs period information (step S21), the component mounting device 10 restarts production (step S3).

[0088] The above describes example 2 of the operation of the component mounting device 10.

[0089] Figure 10 is a flowchart illustrating example 3 of the operation of the component mounting device 10 shown in Figure 1. Figure 11 is a graph showing an example of luminance values ​​acquired by the component mounting device 10 shown in Figure 1 at multiple time points. Example 3 of the operation of the component mounting device 10 will be explained with reference to Figures 10 and 11.

[0090] As shown in Figure 10, Operation Example 3 differs from Operation Example 1 mainly in that it performs the process in step S22 instead of the process in step S8, and the process in step S23 instead of the process in step S17. The differences from Operation Example 1 will be explained below in detail.

[0091] As shown in Figure 10, if the determination unit 42 determines that the luminance value is not equal to or greater than the first threshold (No in step S7), it determines whether the luminance value is equal to or greater than the second threshold (step S22). For example, as shown in Figure 11, the second threshold is predetermined and is a different threshold from the first threshold. The second threshold is smaller than the first threshold.

[0092] As shown in Figure 11, for example, if the current time is T7, the brightness value acquired at the current time is L2, the first threshold is L3, and the second threshold is L4, the determination unit 42 determines that the brightness value of the adsorption surface 26 in the image captured by the imaging unit 32 is not equal to or greater than the first threshold, and also determines that the brightness value is equal to or greater than the second threshold.

[0093] If the determination unit 42 determines that the brightness value is equal to or greater than the second threshold (Yes in step S22), the output unit 46 outputs warning information (step S9). In other words, the output unit 46 outputs warning information if it determines that the brightness value is not equal to or greater than the first threshold but is equal to or greater than the second threshold. For example, the output unit 46 outputs warning information by displaying the warning information on the display screen.

[0094] As shown in Figure 10, if the determination unit 42 determines that the luminance value is not equal to or greater than the second threshold (No in step S22), the determination unit 42 determines whether or not the planned production has been completed (step S10).

[0095] Similarly, if the determination unit 42 determines that the brightness value is not equal to or greater than the first threshold (No in step S16), the determination unit 42 also determines whether or not the brightness value is equal to or greater than the second threshold (step S23).

[0096] If the determination unit 42 determines that the brightness value is equal to or greater than the second threshold (Yes in step S23), the output unit 46 outputs warning information (step S18). On the other hand, if the determination unit 42 determines that the brightness value is not equal to or greater than the second threshold (No in step S23), the component mounting device 10 restarts production (step S3).

[0097] The above describes example 3 of the operation of the component mounting device 10.

[0098] As described above, the component mounting device 10 can determine the wear condition of the suction surface 26. This makes it easier to replace the suction nozzle 24 at the appropriate time, and helps to prevent a decrease in production efficiency by the component mounting device 10.

[0099] The component mounting device 10 according to the embodiment has been described above.

[0100] The component mounting device 10 according to this embodiment is a component mounting device for mounting components onto a substrate 1, and comprises a suction nozzle 24 having a suction surface 26 for adsorbing components, an imaging unit 32 for imaging the suction surface 26, and a determination unit 42 for determining the wear state of the suction surface 26 based on the image captured by the imaging unit 32.

[0101] According to this, the wear state of the suction surface 26 can be determined based on the image captured by the imaging unit 32.

[0102] Furthermore, in the component mounting device 10 according to the embodiment, the determination unit 42 determines the wear state of the suction surface 26 by determining whether the brightness value of the suction surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold.

[0103] According to this method, the wear state of the adsorption surface 26 can be easily determined by determining whether or not the brightness value of the adsorption surface 26 in the image is equal to or greater than a first threshold.

[0104] Furthermore, in the component mounting device 10 according to the embodiment, the determination unit 42 determines the wear state of the suction surface 26 based on the image captured by the imaging unit 32 after the suction surface 26 has been cleaned and before a component is attached to the suction surface 26.

[0105] According to this, the wear condition can be determined based on the image captured by the imaging unit 32 after removing dirt and other contaminants attached to the suction surface 26, thus enabling more accurate determination of the wear condition of the suction surface 26.

[0106] Furthermore, the component mounting device 10 according to the embodiment further includes a cleaning unit 34 for cleaning the suction surface 26, and the cleaning unit 34 cleans the suction surface 26 when it is determined that the brightness value is equal to or greater than a first threshold.

[0107] According to this, if dirt or other substances adhere to the adsorption surface 26 and the brightness value exceeds the first threshold, the adsorption surface 26 can be cleaned. This suppresses the misjudgment of the wear state of the adsorption surface 26 due to the brightness value exceeding the first threshold caused by dirt or other substances adhering to the adsorption surface 26, thus enabling more accurate determination of the wear state of the adsorption surface 26.

[0108] Furthermore, the component mounting device 10 according to the embodiment further includes a notification unit 48 that notifies an error if it is determined that the brightness value in the image captured by the imaging unit 32 is equal to or greater than a first threshold after the suction surface 26 has been cleaned and before a component is attached to the suction surface 26.

[0109] According to this, if the brightness value in the image captured by the imaging unit 32 after the suction surface 26 has been cleaned but before a component is attached to the suction surface 26 is determined to be above the first threshold, it is highly likely that the suction surface 26 is worn. By notifying an error in such cases, it is possible to prevent the attachment of a component to the substrate 1 using the suction nozzle 24 with a worn suction surface 26.

[0110] Furthermore, the component mounting device 10 according to the embodiment further includes a prediction unit 44 that predicts the time when the brightness value reaches a first threshold based on a plurality of brightness values ​​acquired at a plurality of past points in time.

[0111] According to this, the timing at which the brightness value reaches the first threshold can be predicted, making it easier to replace the suction nozzle 24 before the brightness value reaches the first threshold, and further suppressing the use of a suction nozzle 24 with a worn suction surface 26 to attach components to the substrate 1.

[0112] Furthermore, in the component mounting device 10 according to the embodiment, the prediction unit 44 may predict the arrival time based on two brightness values ​​acquired at the two most recent time points among a plurality of time points.

[0113] According to this, the time when the brightness value reaches the first threshold can be easily predicted, making it easier to replace the suction nozzle 24 before the brightness value reaches the first threshold, and further suppressing the use of a suction nozzle 24 with a worn suction surface 26 to attach components to the substrate 1.

[0114] Furthermore, the component mounting device 10 according to the embodiment further includes an output unit 46 that outputs warning information when it is determined that the time from the most recent of several time points to the arrival time is less than the first period.

[0115] According to this, warning information can be displayed when the time until the brightness value reaches the first threshold is short, making it easier to replace the suction nozzle 24 before the brightness value reaches the first threshold, and further suppressing the use of a suction nozzle 24 with a worn suction surface 26 to attach components to the substrate 1.

[0116] Furthermore, in the component mounting device 10 according to the embodiment, the output unit 46 outputs period information indicating the arrival period when it is determined that the arrival period is equal to or greater than the first period and less than the second period which is longer than the first period.

[0117] According to this, the time period until the brightness value reaches the first threshold can be determined, making it easier to replace the suction nozzle 24 before the brightness value reaches the first threshold, and further suppressing the use of a suction nozzle 24 with a worn suction surface 26 to attach components to the substrate 1.

[0118] Furthermore, in the component mounting device 10 according to the embodiment, the determination unit 42 further includes an output unit 46 that, if it is determined that the brightness value is not equal to or greater than a first threshold, determines whether the brightness value is equal to or greater than a second threshold which is less than the first threshold, and outputs warning information if it is determined that the brightness value is neither equal to or greater than the first threshold nor equal to or greater than the second threshold.

[0119] According to this, warning information can be output when the brightness value exceeds a second threshold which is lower than the first threshold, making it easier to replace the suction nozzle 24 before the brightness value reaches the first threshold, and further suppressing the use of a suction nozzle 24 with a worn suction surface 26 to attach components to the substrate 1.

[0120] Furthermore, the determination method according to the embodiment is a determination method in a component mounting device 10 for mounting components onto a substrate 1, wherein the component mounting device 10 includes an adsorption nozzle 24 having an adsorption surface 26 for adsorbing components, and includes an imaging step for imaging the adsorption surface 26, and a determination step for determining the wear state of the adsorption surface 26 based on the image captured in the imaging step.

[0121] According to this, the same effect as the component mounting device 10 described above is achieved.

[0122] (Other embodiments, etc.) Although one or more embodiments of component mounting devices, etc., have been described above based on embodiments, this disclosure is not limited to these embodiments. Various modifications to the embodiments that a person skilled in the art can conceive of may also be included within the scope of this disclosure, as long as they do not depart from the spirit of this disclosure.

[0123] In the embodiments described above, the component mounting device 10 was described as comprising a plurality of component supply units 20, a plurality of component mounting units 22, a plurality of imaging units 32, and a plurality of cleaning units 34, but it is not limited to this. For example, the component mounting device 10 may comprise not a plurality of units, but one component supply unit 20, one component mounting unit 22, one imaging unit 32, and one cleaning unit 34.

[0124] Furthermore, although the above-described embodiment described a case in which the component mounting section 22 has multiple suction nozzles 24, it is not limited to this. For example, the component mounting section 22 may have only one suction nozzle 24 instead of multiple nozzles.

[0125] Furthermore, although the above-described embodiment described a case in which the determination unit 42 determines the wear state of the adhesive surface 26 based on the brightness value of the adhesive surface 26 in the image captured by the imaging unit 32, the invention is not limited to this. For example, the imaging unit 32 may capture a binarized image according to its brightness, and the determination unit 42 may determine the wear state of the adhesive surface 26 based on the ratio of binary values ​​in the adhesive surface 26 in the binarized image.

[0126] Furthermore, in the above-described embodiment, the cleaning unit 34 was described in the case where it determines that the brightness value of the suction surface 26 in the image captured by the imaging unit 32 is equal to or greater than a first threshold, and cleans the suction surface 26. However, the invention is not limited to this. For example, the cleaning unit 34 may clean the suction surface 26 each time a component that has been adsorbed onto the suction surface 26 is mounted onto the substrate 1, or it may clean the suction surface 26 when it has adsorbed a predetermined number of components, or it may clean the suction surface 26 when it has finished mounting all components onto a single substrate 1.

[0127] Furthermore, although the above-described embodiment described a case in which the prediction unit 44 predicts the arrival time based on two luminance values ​​acquired at the two most recent points in time among a plurality of points in time, it is not limited to this. For example, the prediction unit 44 may predict the arrival time based on a plurality of luminance values ​​acquired at a plurality of points in time. Specifically, for example, the prediction unit 44 may calculate an approximation curve from the plurality of luminance values ​​and use the time of the intersection of the approximation curve and the luminance value = L3 as the predicted arrival time.

[0128] In the embodiments described above, each component may be implemented by dedicated hardware or by executing a software program suitable for each component. Each component may also be implemented by a program execution unit such as a CPU (Central Processing Unit) or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory. Here, the software that implements the apparatus of the embodiments described above is a program that causes a computer to execute each step included in the flowcharts shown in Figures 6, 9, and 10. [Industrial applicability]

[0129] This disclosure can be used in devices for mounting components onto a substrate, etc. [Explanation of Symbols]

[0130] 10. Component mounting device 12 base 14 Conveying section 16 Y-axis table 18 X-axis table 20. Parts Supply Department 22 Component mounting section 24 Suction nozzles 26 Adsorption surface 28 Suction port 30 Circuit board recognition camera 32 Imaging Unit 34 Cleaning Department 36 brushes 38 Drive unit 40 Storage section 42 Judgment section 44 Prediction Section 46 Output section 48 Hochi Department

Claims

1. A component mounting device for mounting components onto a circuit board, A suction nozzle having a suction surface for adsorbing the aforementioned component, An imaging unit for imaging the aforementioned adsorption surface, A determination unit determines the wear state of the adsorption surface by determining whether the brightness value of the adsorption surface in the image captured by the imaging unit is equal to or greater than a first threshold, The system includes a prediction unit that predicts the time when the brightness value reaches a first threshold, based on a plurality of brightness values ​​acquired at multiple points in the past. Component mounting device.

2. The determination unit determines the wear state of the suction surface based on the image captured by the imaging unit after the suction surface has been cleaned and before the component is adsorbed onto the suction surface. The component mounting device according to claim 1.

3. The system further includes a cleaning unit for cleaning the aforementioned suction surface, The cleaning unit cleans the adsorption surface when it is determined that the brightness value is equal to or greater than the first threshold. The component mounting device according to claim 2.

4. The system further includes a notification unit that notifies an error if, after the adsorption surface has been cleaned and before the component is adsorbed onto the adsorption surface, the brightness value in the image captured by the imaging unit is determined to be equal to or greater than a first threshold. The component mounting device according to claim 2 or 3.

5. The prediction unit predicts the arrival time based on the two brightness values ​​obtained at the two most recent time points among the plurality of time points. The component mounting device according to claim 1.

6. The system further includes an output unit that outputs warning information if it is determined that the time period from the most recent of the aforementioned multiple time points to the aforementioned arrival time is less than the first period. The component mounting device according to claim 1 or 5.

7. The output unit outputs period information indicating the arrival period if it is determined that the arrival period is greater than or equal to the first period and less than a second period which is longer than the first period. The component mounting device according to claim 6.

8. If the determination unit determines that the brightness value is not equal to or greater than the first threshold, it determines whether the brightness value is equal to or greater than a second threshold that is less than the first threshold. The system further includes an output unit that outputs warning information when it is determined that the brightness value is not equal to or greater than the first threshold but is equal to or greater than the second threshold. A component mounting device according to any one of claims 1 to 4.

9. A method for determining a component in a component mounting device that mounts components onto a circuit board, The component mounting device includes a suction nozzle having a suction surface for adsorbing the component, The imaging step involves imaging the adsorption surface, A determination step to determine the wear state of the adsorption surface by determining whether the brightness value of the adsorption surface in the image captured in the imaging step is equal to or greater than a first threshold, The prediction step includes predicting the time when the luminance value reaches the first threshold, based on a plurality of luminance values ​​acquired at multiple points in the past, Judgment method.

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