Mounting device, mounting system, and setting method

Abstract

This mounting device comprises a component supply unit and a mounting unit. The component supply unit supplies components from a holding member that holds a plurality of components. The mounting unit has a collection member that collects components from the component supply unit. The mounting unit can collect components at a plurality of collection heights. Within a prescribed short-term component count range, the mounting device makes the mounting unit collect components at a prescribed collection height and performs prescribed allowance determination. When a collection error count has exceeded a prescribed allowed count, the mounting device performs modification processing that repeatedly modifies the collection height of the mounting unit using a short-term offset value for adjusting the collection height. On the basis of the results of the modification processing, the mounting device performs short-term evaluation setting processing that sets the collection height.

Description

[Technical Field]

[0001] This specification discloses a mounting device, a mounting system, and a setting method. [Background technology]

[0002] Conventionally, a mounting device has been proposed that uses mounting conditions, including height, to identify position information for held or mounted electronic components, identifies variations in the positions of electronic components for each mounting condition using multiple identified position information, and then identifies new mounting conditions for electronic components using the identified variations (see, for example, Patent Document 1). This device is said to be able to improve the accuracy of component holding and mounting by, for example, adjusting the height of the suction nozzle depending on the positional deviation of the electronic components during holding and mounting. Another proposed mounting device calculates the difference between the representative dimension of electronic components included in a product lot to be picked up and transported and the reference dimension of the electronic components, sets the amount of descent of the tip of the suction nozzle relative to the product lot based on the difference, calculates a predicted value for the probability of an error occurring, in which the suction nozzle comes into contact with an electronic component included in the product lot, estimates the deviation of the difference from the actual and predicted values ​​of the error probability, and corrects the amount of descent of the tip of the suction nozzle based on the deviation of the estimated difference (see, for example, Patent Document 2). This device is said to be able to improve the stability of pickup and transport. Furthermore, a mounting device has been proposed that mounts components under mounting conditions that prevent component carry-back when mounting component types that are prone to carry-back, where the components still adhere to the nozzle after the process of mounting the components on the board has been performed (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-96509 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-187016 [Patent Document 3] Japanese Patent Application Laid-Open No. 2007-250795 Summary of the Invention [Problem to be solved by the invention]

[0004] However, while Patent Document 1 above describes changing the height of the suction nozzle to improve the accuracy of component holding and placement, it does not consider evaluating accuracy over a shorter period of time. Patent Documents 2 and 3 also do not consider evaluating accuracy over a shorter period of time.

[0005] The present disclosure has been made in consideration of such problems, and its main purpose is to provide a mounting device, a mounting system, and a setting method that can further improve the accuracy of component picking in short-term evaluation. [Means for solving the problem]

[0006] In this disclosure, the following means are adopted to achieve the above-mentioned main object.

[0007] The mounting device of the present disclosure includes: a component supply unit that supplies components from a holding member that holds a plurality of components; a mounting unit having a picking member that picks up the components from the component supply unit and is capable of picking up the components at a plurality of picking heights; a control unit that executes a short-term evaluation setting process that causes the mounting unit to pick up the components at a predetermined picking height within a predetermined range of short-term component numbers, performs a predetermined tolerance judgment, and when the number of picking errors exceeds a predetermined tolerance number, executes a change process that repeatedly changes the picking height using a short-term offset value that adjusts the picking height of the mounting unit, and sets the picking height based on the result of the change process; It is equipped with the following.

[0008] This mounting device performs an allowance determination to determine whether the number of picking errors exceeds a predetermined allowable number within a predetermined range of short-term component counts, and then executes a short-term evaluation setting process to set the picking height based on the results of a change process to change the picking height. Generally, mounting devices require a large number of component statistics to improve picking accuracy in production processes. This mounting device changes the picking height within a predetermined range of short-term component counts to set an appropriate picking height, thereby further improving component picking accuracy in short-term evaluations. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic explanatory diagram showing an example of a mounting system 10. [Figure 2] FIG. 2 is an explanatory diagram showing an example of a mounting unit 20 and a component supply unit 14. [Figure 3] FIG. 3 is an explanatory diagram showing an example of information stored in a storage unit 33. [Figure 4] 10 is a flowchart showing an example of a mounting processing routine. [Figure 5] FIG. 10 is an explanatory diagram showing an example of sampling accuracy. [Figure 6] 10 is a flowchart showing an example of an evaluation setting processing routine. [Figure 7] 10 is a flowchart showing an example of a height change processing routine. [Figure 8] An explanatory diagram of the allowable range of short-term adjustment range Af and production adjustment range Ap. DETAILED DESCRIPTION OF THE INVENTION

[0010] This embodiment will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a mounting system 10 according to an example of the present disclosure. FIG. 2 is a diagram illustrating an example of a mounting unit 20 and a component supply unit 14. FIG. 3 is a diagram illustrating an example of mounting condition information 34 and offset information 35 stored in a storage unit 33. The mounting system 10 is configured as a production line in which mounting devices 11 that mount components P on a substrate S as an object to be processed are arranged in the transport direction of the substrate S. Here, the object to be processed is described as a substrate S, but is not particularly limited as long as it is something on which components P can be mounted, and may be a substrate having a three-dimensional shape. As shown in FIG. 1, this mounting system 10 includes the mounting device 11, a management device 40, and the like. Note that FIG. 1 illustrates only one mounting device 11. In this embodiment, the left-right direction (X-axis), the front-back direction (Y-axis), and the up-down direction (Z-axis) are as shown in FIGS. 1 and 2.

[0011] As shown in Fig. 1, the mounting device 11 includes a board processing unit 12, a component supply unit 14, a component imaging unit 18, a mounting unit 20, a control unit 31, and an operation panel 36. The board processing unit 12 is a unit that carries in, transports, fixes at the mounting position, and carries out the board S. The board processing unit 12 has two pairs of conveyor belts that are spaced apart from each other at the front and rear of Fig. 1 and span the left and right directions. The board S is transported by these conveyor belts.

[0012] The component supply unit 14 is a unit that supplies components P to the mounting unit 20. The component supply unit 14 has a plurality of feeders 15 equipped with reels around which holding members 16 (tape members) that hold components are wound. The holding members 16 are formed with holding sections 17 as storage spaces at equal intervals, and the components P are held in these holding sections 17. The component supply unit 14 also has a tray unit having holding members 16B (trays) on which a plurality of components P are arranged and placed.

[0013] Component imaging unit 18 is a device that captures images of one or more components P picked up and held by mounting head 22 from below. When mounting head 22 that has picked up components P passes above component imaging unit 18, component imaging unit 15 captures an image of components P and outputs the captured image to control unit 31. Control unit 31 uses this captured image to detect the pickup state of components P.

[0014] The mounting unit 20 is a unit that picks up components P from the component supply unit 14 and places them on a board S fixed to the board processing unit 12. The mounting unit 20 includes a head moving unit 21, a mounting head 22, and a picking member 23. The mounting unit 20 also includes an elevation mechanism 24 and a measurement unit 25. The head moving unit 21 includes a slider that moves in the X and Y directions along a guide rail, and a motor that drives the slider. The mounting head 22 picks up one or more components P and moves it in the X and Y directions by the head moving unit 21. The mounting head 22 is removably attached to the slider. One or more picking members 23 are removably attached to the underside of the mounting head 22. The picking members 23 are nozzles that pick up components P using negative pressure. The picking member that picks up the components P may be a mechanical chuck that mechanically grips the components P, in addition to the picking member 23.

[0015] As shown in FIG. 2, the lifting mechanism 24 is a device that engages with the flange of a cylinder to which the collection member 23 is attached and raises and lowers the collection member 23 in the vertical direction. The lifting mechanism 24 may be a ball screw mechanism or a linear motor. This lifting mechanism 24 can finely adjust the position of the tip of the collection member 23 in the vertical direction when the collection member 23 is lowered to its lowest position. Note that the mounting unit 20 may also be equipped with a height adjustment unit that moves the mounting head 22 up and down, thereby finely adjusting the position of the tip of the collection member 23 in the vertical direction. In this way, the mounting unit 20 is configured to be able to pick up components P at multiple picking heights.

[0016] The control unit 31 is configured as a microprocessor centered on a CPU 32 and includes a memory unit 33 that stores various data. The control unit 31 outputs control signals to the board processing unit 12, the component supply unit 14, the component imaging unit 18, the operation panel 36, and the mounting unit 20, and inputs signals from the component supply unit 14, the component imaging unit 18, the operation panel 36, and the mounting unit 20. The memory unit 33 stores mounting condition information 34 and offset information 35. The mounting condition information 34 includes information such as the order in which the components P are to be mounted on the board S, the identification information (ID) of the components P, information on the type of component, and the placement position (XY coordinates) on the board S. The offset information 35 includes an offset value that indicates the amount of adjustment of the height of the picking member 23 from the reference height Hb of the component P when picking the component P from the holding member 16. The offset information 35 includes the ID of the holding member 16, information about the type of the holding member 16, the ID of the held component P, and an offset value, as well as information about the collection accuracy indicating the collection state when the component P was collected. The offset information 35 includes offset values ​​such as an initial offset value set before mounting, a short-term offset value Ff used in the early stages of mounting the component P, and a production offset value Fp that improves collection accuracy over a long period of time. The value with the higher collection accuracy is used in the mounting process. The collection accuracy indicates the accuracy with which the component P is collected by the collection member 23. For example, it may include the distance between the center coordinates of the collection member 23 and the center coordinates of the component P, i.e., the amount of deviation, the rotation angle, etc. In the mounting device 11, as shown in FIG. 2, an offset range F is defined as the allowable range for setting the offset value, ranging from an upper limit Fa to a lower limit Fb. The offset range F can be defined as the allowable range of the top surface height H of the component P for which the offset value can be set. The upper limit Fa may be, for example, 10% or 20% of the thickness t of the component P above the reference height Hb (e.g., +0.1 mm), and the lower limit Fb may be, for example, 20% or 30% of the thickness t of the component P below the reference height Hb (e.g., −0.3 mm).

[0017] The operation panel 36 is a unit for exchanging information with the worker, and has a display unit 37 for displaying a screen and an operation unit 38 operated by the worker.

[0018] The management device 40 is a computer that manages information about each device in the mounting system 10. As shown in FIG. 1, the management device 40 includes a control unit 41, a storage unit 43, a display unit 47, and an input device 48. The control unit 41 is configured as a microprocessor centered on a CPU 42. The storage unit 43 is a device, such as a hard disk drive, that stores various data, such as processing programs. The storage unit 43 stores mounting condition information 44 as a database containing information similar to the mounting condition information 34, offset information 45 as a database containing information similar to the offset information 35, and the like. The mounting condition information 44 and the offset information 45 include information about all mounting devices 11 in the mounting system 10. The display unit 47 is an LCD screen that displays various information. The input device 48 includes a keyboard, a mouse, and the like, through which an operator inputs various commands.

[0019] Next, the operation of the mounting system 10 of this embodiment configured as described above will be described, firstly, the process of performing the mounting process using the offset value. FIG. 4 is a flowchart showing an example of a mounting process routine executed by the CPU 32 of the control unit 31. This routine is stored in the storage unit 33 and executed in response to instructions from an operator. When this routine is executed, the CPU 32 reads and acquires the mounting condition information 34 (S100), transports and fixes the substrate S (S110), and determines whether any feeder 15 is out of components (S120). This determination of component out-of-component status may be performed each time the mounting head 22 picks up a component P. If a component out-of-component status has occurred, the CPU 32 replaces the feeder 15 (S130). The feeder 15 may be replaced by a loader as an automatic replacement device, or may be replaced by the operator after being notified. After S130, or if there is no component shortage in S120, the CPU 32 uses the offset value to have the picking member 23 pick up a component P based on the arrangement order in the mounting condition information 34 (S140). The CPU 32 uses the offset value corresponding to the component P to lower and / or raise the picking member 23 to a position where the push-in amount (e.g., 0.1 mm to 0.3 mm, 0.1 mm to 0.2 mm, etc.) is greater than the upper surface height H of the component P. Next, the CPU 32 has the component imaging unit 18 capture an image of the picked component P and obtain the pickup state of the component P (S150). The CPU 32 analyzes the captured image and obtains the amount of deviation of the component P from the center of the picking member 23, the rotation angle, etc.

[0020] FIG. 5 is an explanatory diagram showing an example of picking accuracy. FIG. 5 shows an example in which picking accuracy deteriorates as one moves to the right. As shown in FIG. 5, a picking error occurs when the picking accuracy has a positional deviation outside the allowable range, or when the component P is picked up upside down, upright, or incorrectly picked. Furthermore, although mounting processing can be performed with a picking accuracy (good), it is preferable to pick up the component P with a deviation level corresponding to a picking accuracy (excellent). The CPU 32 stores the picking accuracy as the acquired picking state in the memory unit 33.

[0021] After S150, the CPU 32 moves the picked component P and places it in a predetermined position on the board S (S160). At this time, the CPU 32 discards any picked component P and picks it again later. Next, the CPU 32 determines whether there is a next component P to be placed on the board S based on the mounting condition information 34 (S170). If there is a next component P, the CPU 32 executes the processes from S120 onwards. That is, if there is a component shortage, the CPU 32 replaces the feeder 15, picks a component P using the offset value corresponding to the component P, and repeats the process of placing the component P on the board S. On the other hand, if there is no next component P in S170, the CPU 32 determines whether the placement of the component P on this board S has ended and determines whether the production of the board S is complete (S180). If the production of the board S is not complete, the CPU 32 determines that there is a next board S and executes the processes from S110 onwards. That is, the process of ejecting the board S on which mounting has been completed, transporting and fixing the next board S, and using the offset value to pick and place the component P is repeatedly executed. On the other hand, when production is completed in S180, the CPU 32 ends this routine.

[0022] Next, the process of setting an offset value will be described. FIG. 6 is a flowchart showing an example of an evaluation setting process routine executed by the CPU 32 of the control unit 31. This routine is stored in the memory unit 33 and executed in parallel with the mounting process routine. Here, the process of setting an offset value for a specific component P held by a feeder 15 attached to a specific slot of the component supply unit 14 will be described. That is, it is assumed that the mounting device 11 executes this offset value setting process for each feeder 15 to be mounted. When this routine is executed, the CPU 32 acquires information about the component P to be processed (S200). Examples of the information about the component P include the ID of the feeder 15, the ID of the component P, and the number of past mountings of the component P. Examples of the past mountings include the number of mountings completed by the mounting device 11.

[0023] Next, the CPU 32 determines whether the component P requires the short-term evaluation setting process of S20 (S210). The CPU 32 may determine that the short-term evaluation setting process is required after the feeder 15 is replaced with a new holding member 16, or when the number of components P falls below a predetermined number of mounting records. When the holding member 16 is replaced, the shape of the component P or the holding portion 17 may change, which may change the height H of the component P. Furthermore, if the number of mounting records is small, the offset value may not be sufficiently appropriate. In such cases, the CPU 32 determines that the short-term evaluation setting process is required. Note that the CPU 32 may make this determination based on either the replacement of the holding member 16 or the number of mounting records, or may make the determination based on other factors. Here, the short-term evaluation setting process refers to a process for obtaining a generally favorable short-term offset value using a short-term component number Nf that is smaller than the production process.

[0024] When determining that the short-term evaluation setting process is required, the CPU 32 determines whether the short-term component number Nf of components P has been sampled in the mounting process (S220). Here, the short-term component number Nf may be, for example, a number of components smaller than the number of components in the production process, or a number of components smaller than the production sample number Np used in the production evaluation setting process (S30) that evaluates and sets the sample height in the production process or the total number of components in the production process. The short-term component number Nf may be, for example, less than half, less than one-fifth, less than one-tenth, or less than one-hundredth of the total number of components in the production process and / or the production sample number Np. This short-term component number Nf may be less than 5,000 components, more preferably less than 4,000 components, even less than 2,000 components, or even less than 1,000 components. The production sample number Np is the number of components used as a cutoff for evaluating the sample height to set a production offset value Fp with higher sample accuracy. The production collection number Np is set to, for example, 1 / 5 or less, 1 / 10 or less, or 1 / 100 or less of the total number of applicable parts P so that a sufficient number of evaluations are performed. The production collection number Np is set to a value (e.g., 2000) smaller than the total number of applicable parts P (e.g., 50,000). The production collection number Np may be 1,000 or more, more preferably 2,000 or more, even 5,000 or more, or even 10,000 or more, or 15,000 or more. The short-term part number Nf may be 5,000 or less, and the production collection number Np may be equal to or greater than the short-term part number Nf. For example, the short-term part number Nf is the total number of parts P for which a useful short-term offset value Ff can be set with a smaller number of parts. The collection number Na is the number of parts at which the short-term offset value Ff of the collection height is evaluated, and is included in the short-term part number Nf. For example, if 20 picking members 23 are attached to the mounting head 22, the mounting head 22 will pick 500 components P in 25 component pickings. Here, if the short-term component count Nf is 2000 and the pick count Na is 500, the offset range F can be divided into four short-term adjustment widths Af (see FIG. 8, described later), and the short-term evaluation and setting process can evaluate and set the short-term offset value Ff in four levels. In other words, a total of 2000 components P can be used to evaluate and set the most suitable short-term offset value Ff from among the four levels.Here, we will mainly explain the case where the short-term part count Nf is 2000, the pick count Na is 500, the short-term adjustment range Af is 0.1 mm, the offset range F is +0.1 mm to -0.3 mm (|0.4| mm), the production pick count Np is 2000, and the production adjustment range Ap is 0.01 mm.

[0025] If the CPU 32 determines in S220 that the short-term component count Nf of components P has not been collected, it determines whether the CPU 32 has collected the collection count Na of components P (S230). If the CPU 32 has not collected the collection count Na of components P, it repeatedly executes the process from S220 onward. That is, the CPU 32 repeatedly collects components P using the currently set offset value (e.g., the initial offset value) and waits until the CPU 32 has collected the collection count Na of components P within the short-term component count Nf. On the other hand, if the CPU 32 has collected the collection count Na of components P in S230, it acquires the error score and collection accuracy obtained for the collection count Na (S240). The error score refers to the number of errors that occurred when collecting the components P with the collection count Na. This collection accuracy may be the average value of the collection accuracy when collecting the components P with the collection count Na. When acquiring the collection accuracy, the CPU 32 may, for example, ignore the collection accuracy for the first few times (e.g., one or two times) or not use it in calculating the average value. When the first part P is picked, the holding member 16 is at the tip end, and the holding member 16 may be deformed or the part P may not be held in the correct position. Therefore, it is desirable to determine the picking accuracy by excluding such irregular states.

[0026] Next, the CPU 32 determines whether the error score is within the short-term allowable number Xf (S250). The short-term allowable number Xf is a threshold for the number of errors allowable in the short-term evaluation setting process and may be set based on an allowable error rate. For example, if the number of samples Na is 500 and the allowable error rate is 0.2%, the short-term allowable number Xf is 1, and the CPU 32 determines that two sample errors are not allowable in this step. If the error score is within the short-term allowable number Xf, the CPU 32 determines that the sample accuracy is at a level at which errors are unlikely to occur, and determines whether the sample accuracy acquired in S240 is within the short-term allowable range Rf (S260). The short-term allowable range Rf is a threshold for sample accuracy allowable in the short-term evaluation setting process and may be empirically set based on an allowable sample accuracy value. This short-term allowable range Rf may be set to a range of sample accuracy lower than the production allowable range Rp based on the sample accuracy allowable in the production evaluation setting process (S30), or may be set to a sample accuracy equivalent to the production allowable range Rp. Specifically, the short-term allowable range Rf may be set to the sampling accuracy (good) or the sampling accuracy (best) in FIG.

[0027] When the collection accuracy exceeds the short-term allowable range Rf in S260, or when the error count exceeds the short-term allowable number Xf in S250, the CPU 32 executes height change processing to adjust the collection height by the short-term adjustment range Af (S270), and executes the processing from S220 onward. FIG. 7 is a flowchart showing an example of the height change processing routine executed in S270. FIG. 8 is an explanatory diagram of the allowable range of the short-term adjustment range Af and the production adjustment range Ap, FIG. 8A is an explanatory diagram of the collection height adjustment, and FIG. 8B is a diagram showing the relationship between the collection accuracy and the collection height. When this processing starts, the CPU 32 determines whether the collection height of the component P has reached the upper limit Fa (S271). If the collection height has not reached the upper limit Fa, the CPU 32 determines whether the collection height is being lowered (S272). If the collection height is being lowered, the CPU 32 determines whether the collection height has reached the lower limit Fb (S273). As shown in FIG. 8B , empirically, the picking accuracy worsens when the picking member 23 does not reach the top surface of the component P. Once the picking member 23 reaches the top surface of the component P, the picking accuracy tends to decrease gradually even if the pushing amount increases. Therefore, in the height change process, the CPU 32 first lowers the picking member 23 to its fullest extent and then raises it from the reference height Hb. If the picking height has not reached the lower limit Fb in S273, the CPU 32 sets a short-term offset value Ff that lowers the picking height using the short-term adjustment range Af (S274). On the other hand, if the picking height has reached the lower limit Fb in S273 or is not being lowered in S272, the CPU 32 sets a short-term offset value Ff that raises the picking height from the reference height Hb using the short-term adjustment range Af (S275). Then, after S275, after S274, or when the picking height is equal to the upper limit Fa in S271, the CPU 32 ends this routine. In this height change process, the picking height is lowered to a lower limit value Fb using a short-term adjustment range Af, and then, if necessary, is raised to an upper limit value Fa (see FIG. 8A). When the short-term offset value Ff is changed, the mounting process routine picks components P using the changed value, and the CPU 32 calculates the error score and picking accuracy at that offset value in S240. Note that in this height change process, a temporary short-term offset value Ff is set that can be changed later.

[0028] On the other hand, when the number of short-term component parts P, Nf, is picked in S220, or when the picking accuracy is within the short-term tolerance range Rf in S260, the CPU 32 determines the short-term offset value Ff as the picking height that provides the best picking accuracy (S280). At this time, the CPU 32 may set the short-term offset value Ff so that the picking height corresponds to the height with the lowest number of picking errors in the short-term evaluation setting process. Alternatively, the CPU 32 may set the short-term offset value Ff so that the picking height corresponds to the height with the highest picking accuracy in the short-term evaluation setting process. The priority between the number of errors and picking accuracy may be set as an initial value that prioritizes the lowest number of errors, and may be set by the operator as appropriate. In this way, the CPU 32 first sets a better short-term offset value Ff within the offset range F for a smaller number of components using a relatively large short-term adjustment range Af. After determining the short-term offset value Ff, the CPU 32 executes the mounting process using this determined short-term offset value Ff.

[0029] On the other hand, after determining the short-term offset value Ff in S280, or when the short-term evaluation setting process is not required in S210, the CPU 32 executes the production evaluation setting process (S30), which sets a production offset value Fp with higher collection accuracy than that of the short-term evaluation setting process. In the production evaluation setting process, the CPU 32 first determines whether a production collection quantity Np of components P has been collected in the mounting process using the current offset value (S300). Here, the CPU 32 determines whether 2,000 components P have been collected. The short-term offset value Ff is initially used as the offset value, and when updated, the production offset value Fp is used. When the production collection quantity Np of components P has been collected, the CPU 32 assumes that a considerable amount of data has been accumulated and acquires the number of errors that occurred during that period and the collection accuracy (S310). The collection accuracy may be an average value, as in the short-term evaluation setting process. Next, the CPU 32 determines whether the number of errors is within a predetermined production allowance quantity Xp (S320). The allowable production quantity Xp is a threshold value for the number of errors allowed in the production evaluation setting process, and may be set based on the allowable error rate. For example, if the production collection quantity Np=2000 and the allowable error rate is 0.1%, the allowable production quantity Xp=2, and the CPU 32 determines that three collection errors are not allowable in this step.

[0030] If the number of error points is within the predetermined allowable production number Xp in S320, the CPU 32 determines whether the collection accuracy acquired in S310 is within the allowable production range Rp (S330). The allowable production range Rp is a threshold for collection accuracy allowed in the production evaluation setting process and may be empirically set based on the value of allowable collection accuracy. This allowable production range Rp may be the collection accuracy (best) of FIG. 5. If the collection accuracy exceeds the allowable production range Rp in S330 or if the number of error points exceeds the allowable production number Xp in S320, the CPU 32 executes a height change process to adjust the collection height using the production adjustment range Ap (S340). This height change process is equivalent to the height change process of FIG. 7 described above, in which the short-term adjustment range Af is changed to the production adjustment range Ap and the production offset value Fp is updated. In this height change process, the collection height is lowered to the lower limit Fb using the production adjustment range Ap, and then, if necessary, is raised to the upper limit Fa (see FIG. 8A). In this height change process, the CPU 32 executes a process for obtaining the collection accuracy at a fine collection height using a production adjustment range Ap with a smaller adjustment amount, as shown in FIG. 8A.

[0031] On the other hand, if the picking accuracy is within the production tolerance range Rp in S330, the CPU 32 determines that the current picking height indicates a fairly high picking accuracy and sets the current offset value to the production offset value Fp (S350). After S340, after S350, or if the components P corresponding to the production picking number Np have not been picked in S300, the CPU 32 executes the processing from S200 onward. That is, the CPU 32 acquires information about the components P to be processed and repeats the process of waiting until the mounting head 22 picks the components P corresponding to the production picking number Np. In this way, the CPU 32 uses the fine production adjustment range Ap to set a more favorable production offset value Fp for a larger number of components within the offset range F. Once the production offset value Fp is set, the CPU 32 continues the mounting processing using this set production offset value Fp. After performing the short-term evaluation setting process, the production evaluation setting process is performed to set the production offset value Fp to a value that improves picking accuracy, as shown in FIG. 8A. The control unit 31 may store the set short-term offset value Ff and production offset value Fp in offset information 35 and output the offset information 35 to the management device 40. The management device 40 updates the offset information 45 as a database using the acquired offset information 35.

[0032] Here, the correspondence between the components of this embodiment and the components of the present disclosure will be clarified. In this embodiment, component P corresponds to the component of the present disclosure, holding member 16 corresponds to the holding member, collection member 23 corresponds to the collection member, component supply unit 14 corresponds to the component supply unit, mounting unit 20 corresponds to the mounting unit, control unit 31 corresponds to the control unit, and component imaging unit 18 corresponds to the imaging unit. Also, short-term component count Nf corresponds to the short-term component count, short-term allowable count Xf corresponds to the predetermined allowable count, short-term offset value Ff corresponds to the short-term offset value, short-term allowable range Rf corresponds to the allowable range, collection count Na corresponds to the collection count, short-term adjustment range Af corresponds to the adjustment range, upper limit value Fa corresponds to the upper limit, lower limit value Fb corresponds to the lower limit, production collection count Np corresponds to the production collection count, and production offset value Fp corresponds to the predetermined production offset value. In addition, the processes of S250 and S260 in this embodiment correspond to the allowance determination of the present disclosure, the process of S270 corresponds to the change process, the process of S20 corresponds to the short-term evaluation setting process, and the process of S30 corresponds to the production evaluation setting process. Note that in this embodiment, an example of the setting method of the present disclosure is also clarified by explaining the operation of the control unit 31.

[0033] The mounting apparatus 11 of the present embodiment described above includes a component supply unit 14 that supplies components P from a holding member 16 holding multiple components P; a mounting unit 20 having a picking member 23 that picks components P from the component supply unit 14 and is capable of picking components P at multiple picking heights; and a control unit 31 that performs a predetermined tolerance determination (S250) to have the mounting unit 20 pick components P at a predetermined picking height within a predetermined short-term component count Nf. If the number of picking errors exceeds a predetermined short-term allowable number Xf, a change process (S270) is performed to repeatedly change the picking height using a short-term offset value Ff to adjust the picking height of the mounting unit 20. The control unit 31 then performs a short-term evaluation setting process to set the picking height based on the results of the change process. The mounting apparatus 11 performs a tolerance determination to determine whether the number of picking errors exceeds the predetermined short-term allowable number Xf within the predetermined short-term component count Nf, and then performs a short-term evaluation setting process to set the picking height based on the results of the change process. Generally, in a mounting apparatus, a large number of component statistics may be required to improve picking accuracy in production processes. In this mounting device, the picking height is changed within the range of the predetermined short-term component number Nf to set an appropriate picking height, so that the picking accuracy of the components P can be further improved in the short-term evaluation.

[0034] The mounting device 11 also includes a component supply unit 14, a mounting unit 20, and a control unit 31 that causes the mounting unit 20 to pick components P at a predetermined picking height using a short-term offset value Ff within the range of the short-term component number Nf, determines the picking accuracy with which the mounting unit 20 picks the components P and performs a predetermined tolerance judgment, and if the determined picking accuracy is outside the short-term tolerance range Rf, executes a change process that repeatedly changes the picking height using the short-term offset value Ff, and executes a short-term evaluation setting process that sets the picking height based on the results of the change process. This mounting device 11 changes the picking height within the range of the short-term component number Nf to set an appropriate picking height, thereby further improving the picking accuracy of components P in the short-term evaluation.

[0035] Furthermore, the control unit 31 sets the picking height to a height that minimizes the amount of component misalignment as the picking accuracy. This mounting device 11 can further improve the picking accuracy of components P based on the amount of component misalignment. Furthermore, the control unit 31 performs an acceptance determination (S250, 260) for each predetermined picking number Na within the short-term component number Nf. When the number of picked components P reaches the short-term component number Nf, even if it is less than the picking number Na (S230), the control unit 31 sets the picking height (S280). This mounting device 11 can perform short-term evaluation effectively. The picking height has an upper limit Fa and a lower limit Fb. When changing the picking height, the control unit 31 lowers the picking height toward the lower limit Fb using the short-term offset value Ff, and then raises the picking height toward the upper limit Fa as necessary. Generally, in mounting devices, picking accuracy tends to decrease and the incidence of picking errors tends to increase when the picking member 23 is far from the component P compared to when the picking member 23 is pressed into the component P. In this mounting device 11, the picking position is first lowered, which makes it easier to determine a more suitable picking height.

[0036] Furthermore, after setting the picking height in the short-term evaluation setting process (S20), the control unit 31 executes a change process in the production process, repeatedly changing the picking height using a predetermined production offset value Fp based on a predetermined production picking number Np greater than the short-term component number Nf, and then executes a production evaluation setting process (S30) to set the picking height based on the results of the change process executed within the range of the production picking number Np. In this mounting device 11, the short-term evaluation setting process can set a roughly preferable picking height for the short-term component number Nf, and then the production evaluation setting process can set a more accurate picking height for the larger production picking number Np. Furthermore, the short-term offset value Ff has a larger short-term adjustment range Af than the production adjustment range Ap of the production offset value Fp. In this mounting device 11, the larger picking height adjustment range can be used in the short-term evaluation setting process to obtain a rough trend in the picking state, allowing a picking height that is more preferable in the short term to be set. In addition, in the mounting device 11, the short-term component count Nf is 2,000, which is less than 5,000 components, and the production pick count Np is 2,000, which is a number of components equal to or greater than the short-term component count Nf. A smaller value for the short-term component count Nf is preferable for short-term evaluation, while a larger value for the production pick count Np is preferable for improved accuracy. Furthermore, the control unit 31 executes a short-term evaluation setting process for components P after the component supply unit 14 replaces the holding member 16 and / or for components P whose pick count by the mounting unit 20 is below a predetermined actual number. This mounting device 11 can execute the short-term evaluation process when necessary. Furthermore, the mounting device 11 includes a component imaging unit 18 that captures images of components P being picked by the mounting unit 20, and the control unit 31 performs an acceptability determination based on the captured images of the components P. This mounting device 11 can determine the pick status of the components P based on the captured images.

[0037] The mounting system 10 also includes a mounting device 11 and a management device 40 that manages the mounting device 11. Because the mounting system 10 includes the above-described mounting device 11, it is possible to further improve the picking accuracy of the components P in short-term evaluation by changing the picking height within the range of the predetermined short-term component number Nf to set a suitable picking height. In addition, the setting method described in Figures 6 and 7, similar to the above-described mounting device 11, changes the picking height within the range of the predetermined short-term component number Nf to set a suitable picking height, thereby further improving the picking accuracy of the components P in short-term evaluation.

[0038] It goes without saying that the present disclosure is not limited to the above-described embodiments, and can be implemented in various forms as long as they fall within the technical scope of the present disclosure.

[0039] For example, in the above-described embodiment, the short-term evaluation setting process of S20 is executed in the initial stage of the production process, but this is not particularly limited, and the short-term evaluation setting process may be executed alone. For example, only the short-term evaluation setting process may be executed as a performance evaluation of the device. Specifically, the processes of S200 to S280 of the evaluation setting process routine may be executed. At this time, if the state of the components P after being picked is grasped, the process of placing the components P on the board S may be omitted. In this mounting device 11, too, the picking height is changed within the range of a predetermined short-term component number Nf to set an appropriate picking height, thereby further improving the picking accuracy of the components P in the short-term evaluation.

[0040] In the above-described embodiment, the short-term offset value Ff is set based on the number of errors in the picking and the picking accuracy, and the picking height is set and determined, but this is not particularly limited, and the picking height may be set and determined based on either the number of errors or the picking accuracy. In this mounting device 11, too, the picking height is changed within the range of a predetermined short-term component number Nf to set an appropriate picking height, thereby further improving the picking accuracy of the components P in the short-term evaluation.

[0041] In the above-described embodiment, the picking height is set to the height at which the amount of misalignment of the component P is minimized as the picking accuracy, but this is not particularly limited, and factors other than the amount of misalignment may be used as long as it is possible to set the picking height to further increase the picking accuracy. Note that the picking accuracy also includes that determined by a sensor that checks the component in a picked-up state from the side.

[0042] In the above-described embodiment, the allowance determination in steps S250 and S260 is performed for each collection number Na within the short-term component number Nf. However, this is not limited to the collection number Na and may be set arbitrarily. To simplify processing, it is preferable to set the collection number Na to a multiple of the number of components (20 in this example) that the mounting head 22 can pick up at one time. While the above-described embodiment assumes that the mounting head 22 mounts 20 collection members 23, this is not a limitation and the number may be set to 2, 12, 18, or other numbers appropriate to the mounting head 22 and the components P. Alternatively, in the above-described embodiment, the collection height is set when the number of picked components P reaches a predetermined short-term component number Nf, even if the number is less than the collection number Na. However, this is not a limitation and the collection height may be set after the short-term component number Nf is reached and Na number of components P has been picked up.

[0043] In the above-described embodiment, the sampling height is set by lowering the sampling height toward the lower limit value Fb using the short-term offset value Ff, and then increasing the sampling height toward the upper limit value Fa as necessary, but this is not particularly limited, and the sampling height may be set by increasing the sampling height toward the upper limit value Fa, and then decreasing the sampling height toward the lower limit value Fb. Note that lowering the sampling height first is preferable from the viewpoint of shortening the time required to improve sampling accuracy.

[0044] In the above-described embodiment, in S210, the short-term evaluation setting process is executed for components P after the replacement of the holding member 16 in the component supply unit 14 and / or for components whose number of components picked by the mounting unit 20 is below a predetermined number of actual results. However, this is not particularly limited, and the short-term evaluation setting process may be executed for any component P at the beginning of the mounting process. In this mounting device 11, the picking height is changed within the range of the predetermined short-term component number Nf to set an appropriate picking height, thereby further improving the picking accuracy of components P in the short-term evaluation. Furthermore, in S210, the control unit 31 may omit the determination of either the components P after the replacement of the holding member 16 or the components P whose number of components is below the predetermined number of actual results, or may determine other factors instead of or in addition to this.

[0045] In the above-described embodiment, the collection error and collection accuracy are determined based on the captured image captured by the component imaging unit 18, but this is not particularly limited to this, and for example, an imaging unit that captures images of the components P placed on the board S may be provided in the mounting head 22 or the like, and the collection error and collection accuracy may be determined from the captured image of the components P placed on the board S. With this mounting device 11, too, the collection accuracy of the components P can be further improved in short-term evaluation.

[0046] In the above-described embodiment, the present disclosure has been described as the mounting device 11, but is not particularly limited to this, and may be a setting method, or this setting method may be a program executed by a computer. [Industrial Applicability]

[0047] The mounting apparatus, mounting system, and setting method of the present disclosure can be used, for example, in the field of mounting electronic components. [Explanation of symbols]

[0048] 10 Mounting system, 11 Mounting device, 12 Board processing section, 14 Component supply section, 15 Feeder, 16 Holding member, 17 Holding section, 18 Component imaging section, 20 Mounting section, 21 Head moving section, 22 Mounting head, 23 Picking member, 24 Lifting mechanism, 31 Control section, 32 CPU, 33 Memory section, 34 Mounting condition information, 35 Offset information, 36 Operation panel, 37 Display section, 38 Operation section, 40 Management device, 41 Control section, 42 CPU, 43 Memory section, 44 Mounting condition information, 45 Offset information, 47 Display section, 48 Input device, Af Short-term adjustment range, Ap Production adjustment range, F Offset range, Fa Upper limit value, Fb Lower limit value, Ff Short-term offset value, Fp Production offset value, H Top surface height, Hb Reference height, Na Picked number, Nf Short-term component number, Np Production yield, P component, Rf short-term tolerance, Rp production tolerance, S substrate, t thickness, Xf short-term tolerance, Xp production tolerance.

Claims

1. a component supply unit that supplies components from a holding member that holds a plurality of components; a mounting unit having a picking member that picks up the components from the component supply unit and is capable of picking up the components at a plurality of picking heights; a control unit that executes a short-term evaluation setting process that causes the mounting unit to pick the components at a predetermined picking height within a predetermined range of short-term component numbers, performs a predetermined tolerance judgment, and when the number of picking errors exceeds a predetermined tolerance number, executes a change process that repeatedly changes the picking height using a short-term offset value that adjusts the picking height of the mounting unit, and sets the picking height based on the result of the change process; The control unit causes the mounting unit to pick up the components at a predetermined picking height within a predetermined range of short-term component numbers, determines the picking accuracy with which the mounting unit picks the components and performs a predetermined tolerance judgment, and when the determined picking accuracy is outside the tolerance range, executes a change process that repeatedly changes the picking height using the short-term offset value, executes a short-term evaluation setting process that sets the picking height based on the result of the change process, and sets the picking height to a height at which the amount of positional deviation of the components is smaller as the picking accuracy. Mounting equipment.

2. 2. The mounting device according to claim 1, wherein the control unit performs the allowance determination for each predetermined number of components to be picked that is within the predetermined number of short-term components, and when the number of components picked reaches the predetermined number of short-term components, sets the picking height even if it is less than the predetermined number of components to be picked.

3. The collection height has an upper limit and a lower limit, 3. The mounting device according to claim 1, wherein when changing the collection height, the control unit lowers the collection height toward the lower limit value using the short-term offset value, and then, if necessary, raises the collection height toward the upper limit value to set the collection height.

4. The control unit sets the collection height in the short-term evaluation setting process, and then in the production process, executes a change process that repeatedly changes the collection height using a predetermined production offset value based on a predetermined production collection number that is greater than the predetermined short-term component number, and executes a production evaluation setting process that sets the collection height based on the results of the change process executed within the range of the production collection number.

5. The mounting apparatus according to claim 4 , wherein the short-term offset value has a larger adjustment range than the production offset value.

6. the predetermined short-term part count is 5,000 parts or less; The mounting apparatus according to claim 4 , wherein the predetermined production pick-up quantity is equal to or greater than the short-run component quantity.

7. The mounting device according to any one of claims 1 to 6, wherein the control unit executes the short-term evaluation setting process after the holding member is replaced in the component supply unit and / or for components whose number of components picked up by the mounting unit is below a predetermined number.

8. The mounting device according to any one of claims 1 to 7, an imaging unit that captures an image of the component being mounted by the mounting unit; The control unit performs the acceptance determination based on the captured image of the component.

9. The mounting device according to any one of claims 1 to 8, a management device that manages the mounting device; An implementation system comprising:

10. A setting method executed by a mounting device including a component supply unit that supplies components from a holding member that holds a plurality of components, and a mounting unit that has a picking member that picks the components from the component supply unit and is capable of picking the components at a plurality of picking heights, comprising: a step of causing the mounting unit to pick up the components at a predetermined picking height within a predetermined range of short-term component numbers, making a predetermined tolerance judgment, and when the number of picking errors exceeds a predetermined tolerance number, executing a change process that repeatedly changes the picking height using a short-term offset value that adjusts the picking height of the mounting unit, and executing a short-term evaluation setting process that sets the picking height based on the result of the change process; In the step, the mounting unit is caused to pick up the components at a predetermined picking height within a range of a predetermined number of short-term components, the mounting unit determines the picking accuracy with which the components are picked up and performs a predetermined tolerance judgment, and if the determined picking accuracy is outside the tolerance range, a change process is performed to repeatedly change the picking height using the short-term offset value, a short-term evaluation setting process is performed to set the picking height based on the result of the change process, and the height at which the amount of positional deviation of the components is smaller is set as the picking height.

Images