JP5009939B2 - Mounting condition determination method - Google Patents

Description

  The present invention relates to a mounting condition determination method for a component mounter that mounts components on a board, and more particularly, to a mounting condition determination method in a production line having a plurality of component mounters equipped in parallel with a plurality of transport lanes on which a board is transported. .

  In a component mounter that mounts a component on a board, the mounting condition determination method is optimized in order to mount the component with a shorter tact. Here, the tact is a mounting time required for mounting a plurality of predetermined components on the board.

  Conventionally, as this mounting condition determination method, a method for minimizing the tact for each component mounting machine has been proposed (for example, see Patent Document 1). If the tact for each component mounter can be minimized, the throughput (number of sheets produced per unit time) for each component mounter can be maximized.

  Further, when the production line has a plurality of component mounting machines, a mounting condition determination method that minimizes the line tact of the production line by making the tacts of each component mounting machine uniform has been proposed (for example, patents). Reference 2). Here, the line tact is the maximum tact among the tacts of each component mounter included in the production line. That is, the time required to produce one substrate on the production line is a line tact.

Thus, if the line tact of the production line can be minimized, the throughput of the production line can be maximized. In this method, each component mounting machine is provided with one transport lane for transporting the substrate, and the substrate is sequentially transported one by one on the transport lane, and the production line for mounting the components is targeted. Yes.
JP 2002-50900 A Japanese Patent Laid-Open No. 10-209697

  However, the above mounting condition determination method has a problem that the throughput of the entire production line cannot be maximized when each component mounting machine includes a plurality of transport lanes. The reason will be described below.

  Component mounters include component mounters that include a plurality of transport lanes in parallel. This component mounting machine conveys a board | substrate for every conveyance lane, and mounts components on a board | substrate. That is, by using a component mounter that includes a plurality of transport lanes in parallel, the throughput per unit area is improved compared to using a component mounter that includes only one transport lane.

  In the component mounter including the plurality of transport lanes in parallel, the line tact and the throughput for mounting the components on the board are set for each transport lane. Here, in the above mounting condition determination method, the line tact in one transportation lane can be minimized. However, when each component mounting machine includes a plurality of transport lanes, if the line tact between the transport lanes is imbalanced, a difference occurs in the number of boards produced in each transport lane.

  For example, when components are mounted on the front and back of the board, the components are mounted on the front and back of the board in the first transfer lane, and then mounted on the back of the board in the second transfer lane. If the line tact is the same in the first transport lane and the second transport lane, the throughput of each transport lane is the same.

  However, if the line tact is different between the first transport lane and the second transport lane, the throughput of each transport lane is different, and the number of substrates produced in each transport lane is different. In other words, if the line tact is smaller in the first transport lane than in the second transport lane, the first transport lane has a higher throughput than the second transport lane, and more To produce the substrate.

  Therefore, in this case, more substrates with components mounted on the front are produced than substrates with components mounted on the back. As a result, the number of boards on which components are mounted only on the table increases, and the intermediate inventory of boards increases. That is, the production number of boards mounted on both front and back is the same as the production number in the second transfer lane. Thus, even if a large amount is produced in the first transport lane, the number of sheets produced in the entire production line is the number of sheets produced in the second transport lane.

  Thus, even if the first transport lane is smaller than the line tact in the second transport lane, the line tact in the entire production line becomes the line tact in the second transport lane. Even if the first transport lane is larger than the throughput of the second transport lane, the throughput of the entire production line is the throughput of the second transport lane.

  For this reason, the above-described mounting condition determination method has a problem that the throughput of the entire production line cannot be maximized.

  Therefore, the present invention has been made in view of such problems, and in a production line in which each component mounting machine has a plurality of conveyance lanes, the throughput is improved so that the throughput of the entire production line is maximized. It is an object of the present invention to provide a method for determining mounting conditions that can be performed.

  In order to achieve the above object, a mounting condition determination method according to the present invention targets a production line having a plurality of component mounters each having a plurality of transport lanes in parallel for transporting boards, and each of different types of boards. A method for determining a mounting condition of a component mounter that transports on an assigned transport lane among the plurality of transport lanes and mounts a component on the substrate, and is connected so that the same substrate is transported The ratio of the line tact, which is the maximum mounting time of the mounting time of the component mounting machine required for mounting the predetermined component on the board for each transport lane, approaches the predetermined ratio. A lane balance step for determining a device configuration of a component mounter that mounts a component on a board transported on a transfer lane, and a device configuration determined in the lane balance step Under conditions, for each of the transport lanes, the mounting time to the plurality of component mounting machines is such that the mounting times of the plurality of component mounting machines that mount the components on the board transported on the transport lane approach the same value. And an inter-facility balance step for determining the arrangement of the parts.

  This reduces the line tact in each transport lane, while approaching the ratio set to maximize the throughput of the entire production line, so that the throughput of the entire production line is maximized. Can be improved. For example, when components are mounted on the front and back of the board, the line tact ratio is set so that the same number of boards with components mounted on the front and parts mounted on the back are produced. There are no cases where a large number of boards with components mounted only on the table are produced and the intermediate stock increases.

  In addition, it is possible to bring the line tact in each transfer lane closer to the ratio without controlling the timing and number of substrates to be mounted on the component mounting machine during component mounting on the substrate, and the throughput of the entire production line Can be improved.

  Further, the method further includes a target tact acquisition step of acquiring a target tact that is a target value of a line tact determined for each of the transport lanes from the predetermined ratio, and the inter-lane balance step includes the transport lanes. Each time, a component mounting machine that mounts a component on a board that is transported on the transport lane so that the line tact approaches the first target tact that is the initial target tact acquired in the target tact acquisition step. A unit number determining step for determining the number of units is included.

  As a result, the number of component mounting machines can be determined so that the line tact in each transport lane approaches the first target tact set so that the throughput of the entire production line is maximized. Throughput in the entire line can be improved.

  The inter-facility balance step calculates a mounting time required for mounting a plurality of predetermined components on the board for each of the component lanes determined in the number-of-units determination step for each of the transport lanes. And the mounting time of one component mounting machine calculated in the tact calculating step is determined in advance for each of the transport lanes than the mounting time of other component mounting machines calculated in the tact calculating step. A tact difference determining step for determining whether or not it is greater than a first threshold, which is a determined value, and for each of the transport lanes, if it is determined that the tact difference determining step is greater than a first threshold, the mounting time is Component placement for rearranging a part of the plurality of predetermined parts from the one component mounter to the other component mounter as a condition to be calculated And a step.

  Thereby, since the line tact in each conveyance lane can be reduced, the throughput in the entire production line can be improved.

  The target tact acquisition step includes a change line tact calculation step for calculating a change line tact that is a line tact after parts are rearranged in the part placement step for each of the transport lanes, and the change line The target tact after the change in one transport lane in which the tact is calculated is set to the same value as the change line tact, and the ratio of the target tact after the change in the plurality of transport lanes is the first tact of each of the plurality of transport lanes. A change target tact calculation step of calculating a second target tact that is a target tact after the change in the plurality of transportation lanes so as to be the same as the ratio of one target tact, and the inter-lane balance step includes: Further, a change line tact for determining whether the change line tact is equal to or less than the second target tact for each of the transport lanes. When the change line tact is determined not to be less than or equal to the second target tact in the determination step and the change line tact determination step for each of the transportation lanes, the line tact is less than or equal to the second target tact. And a unit re-determination step for re-determining the changed number from the determined unit number, which is the number of component mounting machines determined in the unit determination step.

  Thereby, the throughput in the whole production line can be improved by setting the second target tact smaller than the first target tact as the target line tact.

  The target tact acquisition step further includes a target production time acquisition step of acquiring a target production time that is a target value of a production time for each board type required to produce a board on which a predetermined component is mounted. A substrate type determination step for determining a substrate type of a substrate to be transferred for each of the transfer lanes, and a transfer of a substrate of the same type as the substrate type determined in the substrate type determination step for each of the transfer lanes The lane number acquisition step of acquiring the number of lanes, which is the number of lanes, and the target production time of the substrate type transferred on the transfer lane acquired in the target production time acquisition step for each of the transfer lanes, the lane A target tact calculation step of calculating the first target tact by multiplying the number of lanes acquired in the number acquisition step.

  Thereby, the throughput in the whole production line can be improved by acquiring the first target tact for each transport lane that matches the target production time or the number of production.

  The present invention can be realized not only as such a mounting condition determination method, but also as a device or program for determining mounting conditions according to the method, and a storage medium for storing the program. Furthermore, the present invention can also be realized as a component mounter that mounts components on a board by determining mounting conditions according to the method.

  According to the present invention, it is possible to provide a mounting condition determination method capable of improving the throughput so that the throughput of the entire production line is maximized in a production line in which each component mounting machine includes a plurality of conveyance lanes. The practical value of the present invention is extremely high.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an external view showing a configuration of a component mounting system 10 that realizes a mounting condition determination method according to the present invention.

  The component mounting system 10 is a production line that mounts components on a board to produce a circuit board, and includes a mounting condition determination device 100 and a plurality of component mounting machines 200 (in the example shown in FIG. 1, nine component mounting machines). And.

  The mounting condition determining apparatus 100 is an apparatus that executes the mounting condition determining method according to the present invention. The mounting condition determining apparatus 100 determines mounting conditions so that the throughput of the entire production line can be improved.

  The component mounter 200 mounts a component such as an electronic component on the board under the conditions determined by the mounting condition determination apparatus 100 as part of the component mounting system 10.

  Specifically, the plurality of component mounting machines 200 mount components while sending a board from upstream to downstream. That is, first, the upstream component mounter 200 receives a board and mounts the component on the board. Then, the board on which the component is mounted is sent to the component mounter 200 on the downstream side. In this way, the boards are sequentially sent to the component mounting machines 200, and the components are mounted.

  FIG. 2 is a plan view showing the main configuration inside the component mounter 200. Here, the substrate transport direction is the X-axis direction, and the front-rear direction of the component mounter orthogonal to the X-axis direction in the horizontal plane is the Y-axis direction.

  The component mounting machine 200 includes a transport lane 215, a transport lane 216, and a transport lane 217 for transporting the three substrates 21, 22 and 23, and two mounting units 210a for mounting components on the three substrates, 210b.

  The transportation lane 215 is disposed on the mounting unit 210a side, the transportation lane 217 is disposed on the mounting unit 210b side, and the transportation lane 216 is disposed between the transportation lane 215 and the transportation lane 217 so as to be parallel to the X-axis direction. Has been.

  The transport lane 215 includes a fixed rail 215a and a movable rail 215b that are parallel to the X-axis direction. The position of the fixed rail 215a is fixed in advance, and the movable rail 215b is movable in the Y-axis direction according to the length of the substrate 21 to be transported in the Y-axis direction.

  Similarly to the transfer lane 215, the transfer lane 216 includes a fixed rail 216a and a movable rail 216b, and the transfer lane 217 includes a fixed rail 217a and a movable rail 217b. The positions of the fixed rail 216a and the fixed rail 217a are fixed in advance, and the movable rail 216b and the movable rail 217b are arranged in the Y-axis direction according to the lengths of the substrate 22 and the substrate 23 to be conveyed in the Y-axis direction, respectively. It is movable.

  Further, the substrate 21, the substrate 22, and the substrate 23 are independently transferred to the transfer lane 215, the transfer lane 216, and the transfer lane 217, respectively.

  The two mounting units 210a and 210b cooperate with each other to perform mounting operations on the substrate 21, the substrate 22, and the substrate 23.

  The mounting unit 210a and the mounting unit 210b have the same configuration. That is, the mounting unit 210a includes a component supply unit 211a, a mounting head 213a, and a component recognition camera (not shown). Similarly, the mounting unit 210b includes a component supply unit 211b, a mounting head 213b, and a component recognition camera (not shown).

  Here, a detailed configuration of the mounting unit 210a will be described. The detailed description of the configuration of the mounting unit 210b is the same as that of the mounting unit 210a, and is therefore omitted.

  The component supply unit 211a includes an array of a plurality of component cassettes 212a that store component tapes. The component tape is, for example, a plurality of components of the same component type arranged on a tape (carrier tape) and supplied in a state of being wound on a reel or the like. The parts arranged on the part tape are, for example, chips and the like, specifically, 0402 chip parts having a size of 4 mm × 2 mm, 1005 chip parts having a size of 10 mm × 5 mm, and the like.

  The mounting head 213 a can include, for example, a maximum of 10 suction nozzles, and can mount a maximum of 10 components from the component supply unit 211 a and mount them on the substrate 21, the substrate 22, and the substrate 23.

  The component recognition camera is used for photographing the component sucked by the mounting head 213a and inspecting the suction state of the component two-dimensionally or three-dimensionally.

  FIG. 3 is a schematic diagram showing the positional relationship between the mounting head 213a and the component cassette 212a.

  As described above, for example, a maximum of ten suction nozzles nz can be attached to the mounting head 213a. The mounting head 213a to which the ten suction nozzles nz are attached can suck components from each of a maximum of ten component cassettes 212a at the same time (by one up and down movement).

  FIG. 4 is a diagram illustrating an example of a component tape and a reel that contain components.

  Components such as chip-type electronic components are housed in a housing recess 221a formed continuously at a predetermined interval on a carrier tape 221 shown in FIG. 4, and are covered with a cover tape 222 attached to the upper surface. The carrier tape 221 with the cover tape 222 attached in this way is supplied to the user in a taping form wound around the reel 223 by a predetermined quantity. The carrier tape 221 and the cover tape 222 constitute a component tape. The configuration of the component tape may be other than the configuration shown in FIG.

  The mounting unit 210a of such a component mounting machine 200 moves the mounting head 213a to the component supply unit 211a and causes the mounting head 213a to attract the component supplied from the component supply unit 211a. The mounting unit 210a moves the mounting head 213a onto the component recognition camera at a constant speed, causes the component recognition camera to capture images of all the components sucked by the mounting head 213a, and accurately detects the suction position of the component. Let Further, the mounting unit 210a moves the mounting head 213a to, for example, the substrate 21 and sequentially mounts all the sucked components on the mounting points of the substrate 21. The mounting unit 210a mounts all the predetermined components on the substrate 21 by repeatedly performing such operations of suction, movement, and mounting by the mounting head 213a. Similarly, the mounting unit 210a mounts all predetermined components on the board 22 and the board 23.

  Similarly to the mounting unit 210a, the mounting unit 210b also repeatedly performs operations such as suction, movement, and mounting by the mounting head 213b, so that all predetermined components are placed on the board 21, the board 22, and the board 23. Implement.

  Then, each of the mounting unit 210a and the mounting unit 210b picks up a component from the component supply unit when the counterpart mounting unit is mounting the component, and conversely, the counterpart mounting unit picks up the component from the component supply unit. When mounting the components, the components are alternately mounted on the substrate 21, the substrate 22, and the substrate 23 so as to mount the components. In other words, the component mounter 200 is configured as a so-called alternating component mounter.

  The two mounting units 210a and 210b mount components only on a board that is set in advance to mount components. For this reason, the board | substrate which is not set to mount components among the board | substrate 21, the board | substrate 22, and the board | substrate 23 is conveyed to the following component mounting machine, without mounting.

  That is, each component mounter is configured to be able to mount components on any of the substrate 21, the substrate 22 and the substrate 23 conveyed to each conveyance lane. The mounting conditions are set so that the component is mounted only on the board that is set to mount, and the board that is not set to mount the component is transported to the next component mounter without being mounted. Can be determined.

  In addition, the board production method of the component mounter 200 can be broadly divided into two methods: a method called a synchronous mode and a method called an asynchronous mode.

  The synchronous mode is a mode in which component mounting is started after a board is carried into two or more transport lanes. That is, when the board is carried into only one lane, component mounting is not started. In the synchronous mode, two mounting heads alternately mount components on two or more boards. Note that the mounting order of the components by the two mounting heads is determined with respect to the one board, regarding two or more boards as one large board.

  The asynchronous mode is a mode in which component mounting is started after a board is loaded into any one of the plurality of transfer lanes. In the asynchronous mode, two mounting heads alternately mount components on one board. That is, for example, when the board 23 is first carried into the transport lane 217, the two mounting heads perform a cooperative operation to mount components on the board 23 in the transport lane 217. Next, when the board 22 is carried into the transfer lane 216, the two mounting heads perform a cooperative operation to mount components on the board 22 in the transfer lane 216.

  Here, the board production method of the component mounter 200 may be either the synchronous mode or the asynchronous mode.

  FIG. 5 is a block diagram showing a functional configuration of the mounting condition determining apparatus 100 in the present embodiment.

  The mounting condition determining apparatus 100 is a computer that performs processing such as determining mounting conditions so that the throughput of the entire production line can be improved. The mounting condition determining apparatus 100 includes an arithmetic control unit 101, a display unit 102, an input unit 103, a memory unit 104, a program storage unit 105, a communication I / F (interface) unit 106, and a database unit 107.

  The mounting condition determining apparatus 100 is realized by a general-purpose computer system such as a personal computer executing the program according to the present invention, and is not connected to the component mounting machine 200, but is a stand-alone simulator (for mounting conditions). It also functions as a decision tool. It should be noted that the function of the mounting condition determining apparatus 100 may be provided in the component mounter 200.

The arithmetic control unit 101 is a CPU (Central Processing Unit), a numerical processor, or the like, and loads and executes a necessary program from the program storage unit 105 to the memory unit 104 in accordance with an instruction from an operator or the like. Each component 102-107 is controlled.

  The display unit 102 is a CRT (Cathode-Ray Tube), an LCD (Liquid Crystal Display), or the like, and the input unit 103 is a keyboard, a mouse, or the like. These are mounted condition determination devices under the control of the arithmetic control unit 101. 100 is used for dialogue between an operator and the like.

  The communication I / F unit 106 is a LAN (Local Area Network) adapter or the like, and is used for communication between the mounting condition determining apparatus 100 and the component mounting machine 200. The memory unit 104 is a RAM (Random Access Memory) or the like that provides a work area for the arithmetic control unit 101.

  The program storage unit 105 is a hard disk or the like that stores various programs that implement the functions of the mounting condition determination apparatus 100. The program is a program for determining a mounting condition by the component mounter 200, and functionally (as a processing unit that functions when executed by the arithmetic control unit 101), the target tact acquisition unit 105a, the inter-lane balance unit 105b, and An inter-facility balance unit 105c is provided.

  The target tact acquisition unit 105a acquires a target tact that is a target value of the line tact for each transportation lane. Here, the target tact is a line tact target value determined from a predetermined line tact ratio. Further, each transport lane refers to each transport lane connected so that the same substrate is transported. The target tact acquisition unit 105a acquires the target tact by calculating the target tact and storing the target tact in the database unit 107 as target tact data 107c described later.

  The inter-lane balance unit 105b determines the device configuration of the component mounting machine that mounts the components on the board transported on the transport lane so that the line tact ratio for each transport lane approaches a predetermined ratio. Specifically, the inter-lane balance unit 105b mounts a component on the board that is transported on the transport lane so that the line tact approaches the target tact acquired by the target tact acquisition unit 105a for each transport lane. Determine the number of aircraft. Note that the device configuration of the component mounter does not have to be the number of component mounters. For example, the number of suction nozzles nz of the mounting head provided in the component mounter and the same type of components provided in the component mounter are stored. It may be the number of parts cassettes.

  The inter-facility balance unit 105 c performs balance adjustment between the component mounting machines 200. Specifically, the inter-facility balance unit 105c includes a plurality of component mounters that mount components on a board transported on the transport lane for each transport lane under the conditions of the device configuration determined by the inter-lane balance unit 105b. The placement of components on the plurality of component mounters 200 is determined so that each of the 200 mounting times approaches the same value.

  The database unit 107 is a hard disk or the like that stores NC data 107a, component library 107b, target tact data 107c, and the like, which are data used for mounting condition determination processing by the mounting condition determination apparatus 100.

  6 to 8 are diagrams illustrating examples of the NC data 107a, the parts library 107b, and the target tact data 107c, respectively.

  FIG. 6 is a diagram illustrating an example of the NC data 107a.

The NC data 107a is a collection of information indicating mounting points of all components to be mounted. One mounting point pi includes a component type ci, an X coordinate xi, a Y coordinate yi, control data φi, and a mounting angle θi. Here, the component type corresponds to the component name in the component library 107b shown in FIG. 7, the X coordinate and the Y coordinate are the coordinates of the mounting point (coordinates indicating a specific position on the board), and the control data is Restriction information (mounting nozzle type nz that can be used, maximum moving acceleration of the mounting head, etc.) regarding the mounting of the component is shown. The mounting angle θi indicates an angle at which the nozzle that sucks the component of the component type ci should rotate. NC (Numeric Control) data to be finally obtained is an arrangement of mounting points that minimizes the line tact.

  FIG. 7 is a diagram illustrating an example of the component library 107b.

  The component library 107b is a library in which unique information about all component types that can be handled by the component mounter 200 is collected. As shown in FIG. 7, the component library 107b includes a component size for each component type (component name), tact (tact specific to the component type under a certain condition), and other constraint information (for usable suction nozzles nz). Type, recognition method by component recognition camera, maximum acceleration ratio of mounting head, etc.). In the drawing, the external appearance of the components of each component type is also shown for reference. In addition, the component library 107b may include information such as the color and shape of the component.

  FIG. 8 is a diagram illustrating an example of the target tact data 107c.

  The target tact data 107c is a collection of information for calculating a target tact for each transportation lane. The target tact data 107c includes “transport lane”, “substrate type”, “lane number”, “first target tact”, “ratio”, “second target tact”, “target production time”, and the like. .

  The “transport lane” is a transport lane that is a target for calculating a target tact. Specifically, it is a name that identifies each transport lane of the transport lane 215, the transport lane 216, or the transport lane 217. Note that the names for identifying the transport lanes are, for example, the transport lane 215 is the F lane, the transport lane 216 is the M lane, and the transport lane 217 is the R lane.

  “Substrate type” is the type of the substrate that is transported on the target transport lane. For example, the type of the substrate transferred to the R lane which is the transfer lane 217 is the substrate type A.

  The “number of lanes” is the number of transport lanes that transport the same type of substrate as the substrate type transported on the target transport lane. For example, since the transport lane for transporting the substrate type A is only the R lane, the “lane number” of the R lane is 1. Similarly, since there are two transfer lanes for transferring the substrate type B, the M lane and the F lane, the “lane number” of the M lane is two.

  The “target production time” is a target value of the production time for each board type required to produce a board on which a predetermined component is mounted. For example, when the goal is to produce substrates of substrate type A at 100 s per board, the “target production time” of substrate type A is 100 s.

  The “first target tact” is a target value of the line tact in the target transport lane. For example, when the target value of the line tact in the R lane is 100 s, the “first target tact” in the R lane is 100 s.

  “Ratio” is the ratio of the first target tact for each of the plurality of transport lanes. For example, when the ratio of the first target tact is R lane: M lane: F lane = 1: 2: 2, the “ratio” is 1 for the R lane and 2 for the M lane and the F lane.

  The “second target tact” is a target tact after changing the “first target tact” in the target transport lane. For example, when the “first target tact” in the R lane is changed to 90 s, the “second target tact” in the R lane is 90 s.

  9 to 12 are flowcharts showing an example of the operation of the mounting condition determining apparatus 100 in the present embodiment.

  First, the target tact acquisition unit 105a acquires a first target tact that is an initial target tact for each transportation lane as follows.

  Specifically, as shown in FIG. 9, first, the target tact acquisition unit 105a acquires the target production time for each substrate type by the input from the input unit 103 (S102). Then, the target tact acquisition unit 105a sets the “target production time” of the target tact data 107c shown in FIG. 8 to the acquired target production time.

  Then, the target tact acquisition unit 105a determines the substrate type of the substrate to be transported for each transport lane (S104). Then, the target tact acquisition unit 105a sets the “board type” of the target tact data 107c to the determined board type.

  Next, the target tact acquisition unit 105a acquires, for each transport lane, the number of lanes that is the number of transport lanes that transport the same type of substrate as the determined substrate type (S106). Then, the target tact acquisition unit 105a sets the “lane number” of the target tact data 107c to the acquired lane number.

  Then, the target tact acquisition unit 105a calculates the first target tact by multiplying the target production time of the substrate type transferred on the acquired transfer lane by the acquired number of lanes for each transfer lane ( S108). Then, the target tact acquisition unit 105a sets the “first target tact” of the target tact data 107c to the calculated first target tact.

  Thereby, the target tact acquisition unit 105a acquires a first target tact that is an initial target tact for each transportation lane.

  Then, the inter-lane balance unit 105b brings the line tact closer to the target tact acquired by the target tact acquisition unit 105a for each transport lane (S112). Specifically, the inter-lane balance unit 105b determines the number of component mounters 200 that mount components on the board transported on the transport lane so that the line tact approaches the first target tact for each transport lane. decide. The number determined by the inter-lane balance unit 105b is referred to as the determined number. Details will be described later with reference to FIG.

  Then, the inter-facility balance unit 105c includes a plurality of component mounting machines such that each tact of each of the plurality of component mounting machines 200 that mount components on the board transported on the transport lane approaches the same value for each transport lane. The arrangement of parts on 200 is determined (S114). Details will be described later with reference to FIG.

  Then, the target tact acquisition unit 105a calculates a changed line tact that is a line tact after the inter-facility balance unit 105c rearranges the components of the component mounter 200 for each transport lane (S116).

  Furthermore, the target tact acquisition unit 105a calculates a second target tact that is the changed target tact for each transportation lane (S118). Specifically, the target tact acquisition unit 105a calculates the ratio of the first target tact for each of the plurality of transportation lanes, and sets the “ratio” of the target tact data 107c to the calculated ratio. Then, the target tact acquisition unit 105a changes the target in the plurality of transport lanes so as to maintain the “ratio” of the calculated target tact data 107c even in the ratio of the changed line tact between the transport lanes. A second target tact, which is a tact, is set. That is, specifically, the target tact acquisition unit 105a sets the target tact after the change in one transport lane in which the change line tact is calculated to the same value as the change line tact, and the target after the change in the plurality of transport lanes. The second target tact, which is the target tact after the change in the plurality of transport lanes, is calculated so that the tact ratio is the same as the first target tact ratio. Then, the target tact acquisition unit 105a sets the “second target tact” of the target tact data 107c to the calculated second target tact.

  Thereby, the target tact acquisition unit 105a acquires the second target tact that is the target tact for each transportation lane.

  Then, the inter-lane balance unit 105b determines whether the changed line tact is equal to or less than the second target tact for each transportation lane (S120).

  If the changed line tact is determined not to be equal to or less than the second target tact for each transportation lane (NO in S120), the inter-lane balance unit 105b brings the line tact closer to the second target tact (S122). Specifically, the inter-lane balance unit 105b re-determines the number of component mounters 200 from the determined number to the changed number so that the line tact is equal to or less than the second target tact for each transport lane. Details will be described later with reference to FIG.

  When the inter-lane balance unit 105b determines that the changed line tact is equal to or less than the second target tact (YES in S120), the process ends.

  FIG. 10 is a flowchart showing an example of approaching the line tact ratio in each transport lane to a predetermined ratio, that is, an example of processing (S112) in which the inter-lane balance unit 105b brings the line tact closer to the first target tact. It is.

  After the target tact acquisition unit 105a calculates the first target tact (S108 in FIG. 9) and acquires the first target tact, the processing of loop 1 is started for each transportation lane as follows ( S202).

  First, the inter-lane balance unit 105b sets the number of component mounters 200 that mount components on the board transported on the transport lane to a predetermined initial number (S204). The predetermined initial number may be one, two, or three or more.

  Then, the inter-lane balance unit 105b calculates a line tact (S206). Further, the inter-lane balance unit 105b determines whether or not the calculated line tact is equal to or less than the target tact (S208).

  When the inter-lane balance unit 105b determines that the calculated line tact is not less than or equal to the target tact (NO in S208), the component is mounted on the board that is transported on the transport lane as a condition for calculating the line tact. The number of component mounters 200 is increased by one from the predetermined initial number (S210). The inter-lane balance unit 105b calculates the line tact with the increased number (S206), and determines whether the calculated line tact is equal to or less than the target tact (S208).

  When the inter-lane balance unit 105b determines that the calculated line tact is equal to or less than the target tact (YES in S208), processing is started for the next transport lane (S212, S202).

  When the number of component mounters 200 is determined for all the transport lanes, the process ends (S212).

  FIG. 11 is a flowchart illustrating an example of the process (S114) performed by the inter-facility balance unit 105c.

  After the balance unit 105b determines the number of component mounting machines 200 so that the line tact approaches the first target tact for each transport lane (S112 in FIG. 9), the loop 2 is performed as follows. Is started (S302).

  First, the inter-facility balance unit 105c calculates a tact for each determined number of component mounters 200 determined by the inter-lane balance unit 105b for each transport lane (S304).

  Then, the inter-facility balance unit 105c has, for each transport lane, the calculated tact of one component mounter 200 is greater than the calculated first tact of the other component mounter 200 by a predetermined threshold or more. Whether or not (S306).

  Further, when the inter-facility balance unit 105c determines that it is greater than or equal to the first threshold value for each transportation lane (YES in S306), a part of a plurality of predetermined parts as a condition for calculating the tact Are rearranged from one component mounter 200 to another component mounter 200 (S308).

  And the balance part 105c between facilities calculates the tact of each component mounting machine 200 after components are rearranged (S304), and is the tact difference between the component mounting machines 200 larger than the first threshold value? It is determined whether or not (S306).

  Further, when the inter-facility balance unit 105c determines that the difference in tact between the component mounting machines 200 is not greater than the first threshold (NO in S306), processing is started for the next transport lane (S310, S302).

  If the components of the component mounter 200 are rearranged for all the transport lanes, the process ends (S310).

  FIG. 12 is a flowchart illustrating an example of processing (S122) in which the inter-lane balance unit 105b brings the line tact closer to the second target tact.

  When the inter-lane balance unit 105b determines that the changed line tact is not less than or equal to the second target tact for each transportation lane (NO in S120 of FIG. 9), the processing of the loop 3 is started as follows. (S402).

  First, the inter-lane balance unit 105b determines whether the number of component mounters 200 is equal to or greater than a second threshold value that is a predetermined value for each transport lane (S404). Here, the second threshold value is an upper limit value of the number of component mounters 200 that mount components on a substrate transported on the transport lane for each transport lane.

  When the inter-lane balance unit 105b determines that the number of component mounters 200 is less than the second threshold for each transport lane (YES in S404), the condition of the component mounter 200 is calculated as a condition for calculating the line tact. The number is increased by 1 from the determined number (S406).

  Further, the inter-lane balance unit 105b calculates a re-change line tact that is a line tact with the number changed from the determined number for each transport lane (S408).

  Then, the inter-lane balance unit 105b determines whether the re-change line tact is equal to or less than the second target tact for each transport lane (S410).

  If the inter-lane balance unit 105b determines that the re-change line tact is not less than or equal to the second target tact for each transport lane (NO in S410), is the number of component mounters 200 greater than or equal to the second threshold value? The processing is repeated (S404 to S410) from the determination of whether or not (S404).

  When the inter-lane balance unit 105b determines that the number of component mounting machines 200 is equal to or greater than the second threshold (NO in S404), the process is started for the next transport lane (S412 and S402).

  Also, when the inter-lane balance unit 105b determines that the re-change line tact is equal to or less than the second target tact (YES in S410), the process is started for the next transport lane (S412 and S402).

  If the number of component mounters 200 is re-determined for all transport lanes, the process ends (S412).

  Thus, in the component mounting system 10 having the component mounting machine 200 having a plurality of transport lanes, the throughput of the entire component mounting system 10 can be improved.

  Here, a specific example of the operation of the mounting condition determining apparatus 100 described with reference to the flowcharts illustrated in FIGS. 9 to 12 will be described below.

  Here, the component mounting system 10 aims to produce a board on which one front and back is mounted every 100 s. In other words, the components are mounted on the front and back of the board type A and the back side of the board type B in the target production time of 100 s, respectively. Further, it is assumed that the board type B has more mounting points than the board type A.

  First, the target tact acquisition unit 105a acquires a first target tact that is an initial target value of the line tact for each transportation lane (S102 to S108 in FIG. 9).

  Specifically, the target tact acquisition unit 105a first acquires a target production time for each substrate type (S102 in FIG. 9).

  That is, the target tact acquisition unit 105 a acquires the target production time from the operator via the input unit 103. Here, the target production time for both the substrate type A and the substrate type B is 100 s. Thus, by setting the substrate type A and the substrate type B to the same target production time, the production of the substrate type A and the substrate type B is completed at the same time. In the case of a front-to-back relationship, intermediate inventory can be eliminated. Similarly, if the relationship between the substrate type A and the substrate type B is a pair relationship that constitutes the control device, it can be shipped or assembled at the same time after production of the substrate, and intermediate stock in the process can be eliminated. The relationship between the substrate type A and the substrate type B is not limited. If the substrate types are close to each other, there is an effect of eliminating intermediate stock.

  Therefore, the target tact acquisition unit 105a acquires the target production time of 100 s for both the substrate type A and the substrate type B. Then, the target tact acquisition unit 105a sets the “target production time” of the target tact data 107c shown in FIG. 8 to the acquired target production time.

  Then, the target tact acquisition unit 105a determines the substrate type of the substrate to be transported for each transport lane (S104 in FIG. 9).

  Specifically, the target tact acquisition unit 105a acquires the number of mounting points of the board type A and the board type B from the NC data 107a shown in FIG. Assign transportation lanes. That is, since the board type B has more mounting points than the board type A, the board type B has two transfer lanes, the transfer lane 215 and the transfer lane 216, and the board type A has one transfer lane 217. Assign lanes. Therefore, the target tact acquisition unit 105a determines that the substrate type B is transferred to the transfer lane 215 and the transfer lane 216, and the substrate type A is transferred to the transfer lane 217. Then, the target tact acquisition unit 105a sets the “board type” of the target tact data 107c to the determined board type.

  Next, the target tact acquisition unit 105a acquires, for each transport lane, the number of lanes that is the number of transport lanes that transport the same type of substrate as the determined substrate type (S106 in FIG. 9).

  Specifically, since the transport lane for transporting the substrate type A is only the transport lane 217, the “lane number” of the transport lane 217 is 1. Similarly, since there are two transport lanes for transporting the substrate type B, the transport lane 215 and the transport lane 216, the “lane number” of the transport lane 215 and the transport lane 216 is two. Accordingly, the target tact acquisition unit 105a acquires the number of lanes 1 for the transport lane 217 and 2 for the transport lane 215 and the transport lane 216. Then, the target tact acquisition unit 105a sets the “lane number” of the target tact data 107c to the acquired lane number.

  Then, the target tact acquisition unit 105a calculates the first target tact by multiplying the target production time by the number of lanes for each transport lane (S108 in FIG. 9).

  Specifically, the “first target tact” of the transport lane 217 is 100 s by multiplying 100 s that is the “target production time” of the substrate type A by 1 of the “number of lanes”. Similarly, the “first target tact” of the transport lane 215 and the transport lane 216 is 200 s, which is obtained by multiplying the “target production time” of the substrate type B by 100 s and “lane number” of 2. That is, the substrate of the substrate type B is produced with two target tacts in 200 s in the transport lane 215 and the transport lane 216, and thus is produced with one target in 100 s. Therefore, the target tact acquisition unit 105a calculates a first target tact of 100 s for the transport lane 217 and 200 s for the transport lane 215 and the transport lane 216. Then, the target tact acquisition unit 105a sets the “first target tact” of the target tact data 107c to the calculated first target tact.

  In this way, the target tact acquisition unit 105a acquires the first target tact that is the initial target tact from the “first target tact” of the target tact data 107c. That is, the target tact acquisition unit 105a determines the “lane number” that is the number of transport lanes assigned to each board type by determining the board type of the board to be transported for each transport lane. Then, the target tact acquisition unit 105a calculates and acquires the target tact by determining the ratio of the target tact for each transportation lane from the “number of lanes”.

  The inter-lane balance unit 105b is a component mounter that mounts components on the board transported on the transport lane so that the line tact approaches the target tact acquired by the target tact acquisition unit 105a for each transport lane. The number is determined (S112 in FIG. 9).

  Specifically, first, the initial number of component mounters 200 for mounting components on a board is predetermined for each transport lane. Then, the inter-lane balance unit 105b sets the number of component mounters 200 to a predetermined initial number (S204 in FIG. 10).

  Here, it is assumed that the initial number of component mounters 200 that mount components on the substrate 23 of the substrate type A transported to the transport lane 217 is one. In addition, the initial number of component mounters 200 that mount components on the substrate 21 and the substrate 22 of the substrate type B conveyed to the conveyance lane 215 and the conveyance lane 216 is two. That is, the inter-lane balance unit 105 b sets one component mounting machine 200 as an initial number in the transport lane 217 and two in the transport lane 215 and the transport lane 216. As described above, the component mounting system 10 includes a total of three component mounters 200.

  FIG. 13 is a diagram showing a component mounting system 10 having three component mounters 200.

  The component mounting system 10 includes three component mounters 200 that are the initial number of component mounters 200. Specifically, the component mounting system 10 includes a component mounter MC1, a component mounter MC2, and a component mounter, which are three component mounters 200 each having three transport lanes 215, transport lanes 216, and transport lanes 217. It has MC3.

  The three component mounting machines 200 mount components while sending boards from upstream to downstream for each conveyance lane. That is, in the transport lane 215, first, the upstream component mounter MC 1 receives the board 21 transported to the transport lane 215 and mounts components on the board 21. And the board | substrate 21 with which the component was mounted is sent out to the conveyance lane 215 of the downstream component mounting machine MC2. Similarly, the board 21 sent out from the component mounter MC2 is sent to the transport lane 215 of the component mounter MC3, and the components are mounted thereon.

  Similarly to the transport lane 215, the transport lane 216 and the transport lane 217 are also transported in sequence on the transport lanes of the component mounter MC1, the component mounter MC2, and the component mounter MC3, respectively. The parts are mounted.

  Note that the component mounter 200 mounts components only on a board that is set in advance to mount components. For this reason, the board | substrate which is not set to mount components among the board | substrate 21, the board | substrate 22, and the board | substrate 23 is conveyed to the following component mounting machine, without mounting.

  Moreover, the component mounting machine 200 which mounts is predetermined for every conveyance lane. Here, the component mounter MC1 performs mounting on the board 23 of the board type A transported to the transport lane 217. Further, the component mounter MC2 and the component mounter MC3 perform mounting on the substrate 21 and the substrate 22 of the substrate type B that are transported to the transport lane 215 and the transport lane 216.

  FIG. 14 is a diagram illustrating an example in which the line tact in each conveyance lane is brought close to the first target tact. In FIG. 14, the transport lane 215 is illustrated as F lane, the transport lane 216 is illustrated as M lane, and the transport lane 217 is illustrated as R lane.

  FIG. 14A shows the tact, line tact, and first target for each component mounter in the respective transport lanes of the three component mounters MC1, component mounter MC2, and component mounter MC3 shown in FIG. It is a figure explaining a tact.

  First, the inter-lane balance unit 105b calculates a line tact for each transport lane (S206 in FIG. 10). Specifically, the inter-lane balance unit 105b calculates the line tact by calculating the tact in each component mounter 200 for each transport lane. As an example of the tact calculation, the component cassettes 212a and 212b are arranged in descending order of the number of components, and the components are mounted from components having a small number of components. As a result, the total time of suction, movement, and mounting of the mounting heads 213a and 213b can be shortened, and fewer tacts are calculated.

  For example, in the transport lane 217, 190 s is required for mounting by the component mounter MC1 (R lane of T1), so the line tact is 190 s (R lane of T10) with respect to 100 s of the target tact. In the transport lane 217, after the components are mounted by the component mounter MC1, the substrate 23 is transported without being mounted by the component mounter MC2 and the component mounter MC3 (R lanes T2 and T3). ). Similarly, in the transport lane 215 and the transport lane 216, the line tact is 300 s with respect to the target tact of 200 s.

  For example, the component mounter 200 that is predetermined as mounting on the substrate 23 transported to the transport lane 217 is one of the component mounters MC1. Accordingly, as described below, the inter-lane balance unit 105b changes the number of the component mounting machines 200 from one of the component mounting machines MC1 so that the line tact 190s approaches the target tact 100s in the transport lane 217. . Similarly, the inter-lane balance unit 105b sets the number of the component mounters 200 in the transfer lane 215 and the transfer lane 216 so that the line tact 300s approaches the target tact 200s. Change from two of MC3.

  First, the inter-lane balance unit 105b determines whether the calculated line tact is equal to or less than the target tact for each transport lane (S208 in FIG. 10). In other words, the inter-lane balance unit 105b determines that the line tact 190s is not less than the target tact 100s in the transport lane 217. Similarly, for the transfer lane 215 and the transfer lane 216, the inter-lane balance unit 105b determines that the line tact 300s is not less than the target tact 200s.

  And as shown in FIG.14 (b), the balance part 105b between lanes is conveyed on a conveyance lane until it is judged that the calculated line tact is below a 1st target tact for every conveyance lane. The number of component mounters 200 for mounting components on the board to be mounted is increased by one from the predetermined initial number (S210, S206, S208 in FIG. 10).

  Specifically, the inter-lane balance unit 105b increases one component mounter MC4. Then, the two component mounters 200 of the component mounter MC1 and the component mounter MC4 are arranged on the substrate 23 transported to the transport lane 217 so that the line tact on the transport lane 217 is equal to or lower than the first target tact. Components are to be mounted.

  Here, it is assumed that the tact of the component mounter MC1 in the transport lane 217 is 100 s (R lane of T1), and the tact of the component mounter MC4 is 80 s (R lane of T4). That is, since the line tact is 100 s with respect to 100 s of the first target tact (R lane of T10), the line tact becomes equal to or less than the first target tact. As described above, the inter-lane balance unit 105b determines that the line tact in the transport lane 217 is equal to or less than the first target tact by increasing one component mounter MC4.

  Similarly, for the transfer lane 215 and the transfer lane 216, the inter-lane balance unit 105b increases one component mounting machine MC5. As a result, the line tact of the transport lane 215 and the transport lane 216 is 200 s, which is 200 s or less of the first target tact (T10 M lane and F lane). In this manner, the inter-lane balance unit 105b determines that the line tact in the transport lane 215 and the transport lane 216 is equal to or less than the first target tact by increasing one component mounter MC5.

  In this way, the inter-lane balance unit 105b determines the determined number of component mounters 200 as two for the transport lane 217 and three for the transport lane 215 and the transport lane 216.

  Here, the inter-facility balance unit 105c provides the components to the plurality of component mounting machines 200 so that the tact of each of the plurality of component mounting machines 200 that mount the components on the board transported on the transport lane approaches the same value. Is determined (S114 in FIG. 9).

  Specifically, first, the inter-facility balance unit 105c calculates a tact for each determined number of component mounters 200 (S304 in FIG. 11). For example, the inter-facility balance unit 105c sets the tact of the component mounter MC1 for mounting components on the board 23 transported to the transport lane 217 to 100 s (R lane of T1), and the tact of the component mounter MC4 to 80 s (T4 of T4). R lane). When the inter-lane balance unit 105b calculates the line tact (S206 in FIG. 10), the tact of each component mounter 200 is calculated. Therefore, the inter-facility balance unit 105c may calculate the tact calculated by the inter-lane balance unit 105b as the tact of each component mounter 200.

  Then, the inter-facility balance unit 105c has, for each transport lane, the calculated tact of one component mounter 200 is greater than the calculated first tact of the other component mounter 200 by a predetermined threshold or more. Is determined (S306 in FIG. 11). Here, the first threshold is 1 s. That is, the inter-facility balance unit 105c determines that 100s, which is the tact of the component mounter MC1, is 1s or more greater than 80s, which is the tact of the component mounter MC4.

  And when the balance part 105c between facilities judges that it is larger than 1st threshold value for every conveyance lane (it is YES at S306 of FIG. 11), it is a part among predetermined parts as conditions for calculating a tact. Are rearranged from one component mounter 200 to another component mounter 200 (S308 in FIG. 11). That is, the inter-facility balance unit 105c determines that the tact of the component mounter MC1 is greater than the tact of the component mounter MC4 by 1 s, which is the first threshold, and therefore some components are mounted from the component mounter MC1 to the component mounter. Reposition to MC4. Specifically, the inter-facility balance unit 105c converts some of the components arranged in the component supply units 211a and 211b of the component mounter MC1 to be mounted on the board 23 into the component supply unit 211a of the component mounter MC4. , 211b.

  As a result, the number of components to be mounted on the substrate 23 by the component mounter MC1 is reduced, and the tact of the component mounter MC1 can be reduced. Further, the number of components to be mounted on the substrate 23 by the component mounter MC4 increases, and the tact of the component mounter MC4 can be increased. In this way, the tacts of the component mounter MC1 and the component mounter MC4 can be equalized.

  And the balance part 105c between facilities calculates the tact of each component mounting machine 200 after components are rearranged (S304 of FIG. 11), and the difference in tact between the component mounting machines 200 is the first threshold value. It is determined whether or not it is larger than the above (S306 in FIG. 11). Here, the inter-facility balance unit 105c calculates the tact of the component mounter MC1 and the component mounter MC4 as 90 s. The inter-facility balance unit 105c determines that the difference in tact between the component mounter MC1 and the component mounter MC4 is not greater than 1 s, which is the first threshold value.

  If the inter-facility balance unit 105c determines that the difference in tact between the component mounters 200 is not greater than the first threshold (NO in S306 in FIG. 11), the process is started for the next transport lane. (S310, S302 in FIG. 11). That is, the inter-facility balance unit 105c determines that the difference in tact between the component mounter MC1 and the component mounter MC4 is not greater than 1 s in the transport lane 217. Next, processing in the transport lane 215 and the transport lane 216 is performed. Is started. Since the difference in tact between the component mounter MC2, the component mounter MC3, and the component mounter MC5 is not greater than 1 s, the processing in the transport lane 215 and the transport lane 216 is also terminated.

  FIG. 15 is a diagram illustrating an example in which the line tact in each transportation lane is brought close to the second target tact. In FIG. 15, the transport lane 215 is illustrated as F lane, the transport lane 216 is illustrated as M lane, and the transport lane 217 is illustrated as R lane.

  FIG. 15A shows a tact, a line tact, and a second tact for each component mounting machine in each conveyance lane included in the five component mounting machines 200 (component mounting machines MC1 to MC5) shown in FIG. It is a figure explaining the target tact of.

  First, the target tact acquisition unit 105a calculates a changed line tact that is a line tact after the inter-facility balance unit 105c rearranges the components of the component mounter 200 for each transport lane (S116 in FIG. 9). . That is, in the transfer lane 217, the tacts of the component mounter MC1 and the component mounter MC4 are both 90 s (R lanes of T1 and T4), and thus the changed line tact is calculated as 90 s (R lane of T10). Similarly, in the transport lane 215 and the transport lane 216, the changed line tact is calculated as 200 s.

  Then, the target tact acquisition unit 105a calculates a second target tact that is the changed target tact for each transportation lane (S118 in FIG. 9). Specifically, the target tact acquisition unit 105a calculates the ratio of the first target tact for each of the plurality of transportation lanes, and sets the “ratio” of the target tact data 107c to the calculated ratio. That is, since the first target tact in the transport lane 217 is 100 s and the first target tact in the transport lane 215 and the transport lane 216 is 200 s, the first target tact in the transport lane 217 is set to 1. Then, the first target tact of the transport lane 215 and the transport lane 216 is 2. Accordingly, the target tact acquisition unit 105a sets the “ratio” of the target tact data 107c shown in FIG. 8 to 1 for the transport lane 217 and 2 for the transport lane 215 and the transport lane 216.

  Then, the target tact acquisition unit 105a sets the target tact after the change in the one transport lane for which the change line tact is calculated to the same value as the change line tact, and the target tact after the change in the plurality of transport lanes The second target tact, which is the target tact after the change in the plurality of transportation lanes, is calculated so as to be the same ratio as the ratio. That is, the target tact after the change in the transport lane 217 is 90 s, which is the same value as the changed line tact. Here, the “ratio” of the target tact data 107 c is 2 for the transport lane 215 and the transport lane 216 compared to 1 for the transport lane 217. Therefore, the target tact after the change in the transport lane 215 and the transport lane 216 is calculated to be 180 s so as to be the same ratio as this ratio. As described above, the target tact acquisition unit 105a calculates the second target tact as 90 s for the transport lane 217 and 180 s for the transport lane 215 and the transport lane 216. Then, the target tact acquisition unit 105a sets the “second target tact” of the target tact data 107c to the calculated second target tact.

  Thereby, the target tact acquisition unit 105a acquires the second target tact that is the target tact for each transportation lane.

  Then, the inter-lane balance unit 105b determines whether the changed line tact is equal to or less than the second target tact for each transportation lane (S120). The changed line tact in the transport lane 217 is 90 s, which is the same as the second target tact (T10 R lane). However, the changed line tact in the transport lane 215 and the transport lane 216 is 200 s, which is larger than the second target tact of 180 s (T lane F and M lane). For this reason, the inter-lane balance unit 105b determines that the changed line tact in the transport lane 215 and the transport lane 216 is not less than or equal to the second target tact.

  Then, when determining that the changed line tact is not less than or equal to the second target tact for each transportation lane (NO in S120 of FIG. 9), the inter-lane balance unit 105b converts the line tact to the second tact as follows. It approaches the target tact (S122 in FIG. 9).

  First, the inter-lane balance unit 105b determines whether the number of component mounters 200 is equal to or greater than a second threshold value that is a predetermined value for each transport lane (S404 in FIG. 12). Here, the second threshold value is 2 in the transport lane 217 and 4 in the transport lane 215 and the transport lane 216. That is, the number of component mounters 200 can be increased up to six. In the transport lane 215 and the transport lane 216, there are three component mounting machines 200 for mounting components on the boards 21 and 22 to be transported. It is determined that there are fewer than four thresholds of four.

  When the inter-lane balance unit 105b determines that the number of component mounting machines 200 is less than the second threshold for each transport lane (YES in S404 in FIG. 12), the number of component mounting machines 200 is determined from the determined number. The number increases by one (S406 in FIG. 12). That is, as shown in FIG. 15B, a component mounter MC6 is added as a component mounter 200 that mounts components on the substrate 21 and the substrate 22 that are transported to the transport lane 215 and the transport lane 216.

  Then, the inter-lane balance unit 105b calculates a re-change line tact that is a line tact with the number changed from the determined number for each transport lane (S408 in FIG. 12). Here, the component mounting machine 200 for mounting components on the board 21 and the board 22 transferred to the transfer lane 215 and the transfer lane 216 is a component mounter MC2, a component mounter MC3, a component mounter MC5, and a component mounter MC6. is there. Then, as the re-change line tact in the transfer lane 215 and the transfer lane 216, the re-change line tact in the four units with the increased number of component mounters MC6 is calculated as 180 s.

  Then, the inter-lane balance unit 105b determines whether or not the re-change line tact is equal to or less than the second target tact for each transport lane (S410 in FIG. 12). When the inter-lane balance unit 105b determines that the changed line tact is equal to or less than the second target tact (YES in S120 of FIG. 9), the process ends. Here, the re-change line tact in the transport lane 215 and the transport lane 216 is 180 s, which is 180 s or less, which is the second target tact. Also in the transport lane 217, the re-change line tact is 90 s, which is 90 s or less, which is the second target tact.

  In this way, the number of component mounting machines 200 is redetermined, with two in the transport lane 217 and four in the transport lane 215 and the transport lane 216.

  In this manner, the throughput in the entire component mounting system 10 is improved by reducing the line tact in each transportation lane and approaching the target tact set so as to maximize the throughput in the entire production line. be able to. In addition, since the parts can be mounted on the front and back of the board of the board type A and the back of the board type B with a target production time of 90 s, the parts are mounted on the back of the board in the time required to mount the parts on the front of the board Can be implemented. That is, there are no cases where a large number of boards with components mounted only on the table are produced and the intermediate stock increases.

  In addition, the line tact in each transfer lane can be brought close to the target tact without controlling the timing and number of boards to be loaded onto the component mounting machine 200 during the mounting of the components on the board. Throughput can be improved.

  As mentioned above, although the mounting condition determination method according to the present invention has been described using the above embodiment, the present invention is not limited to this.

  That is, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  For example, in the present embodiment, the component mounter 200 includes three transport lanes, but the number of transport lanes is not limited to three but may be two or four or more. For example, even when the component mounting machine 200 includes three transport lanes, the components may be mounted only on the board transported on the two transport lanes.

  In the present embodiment, the target tact acquisition unit 105a acquires the target production time from the operator via the input unit 103. However, the target tact acquisition unit 105a acquires the target production time from preset data. Alternatively, the target production time may be acquired by acquiring the target production number of substrates per unit time and calculating the target production time.

  Further, in the present embodiment, the target tact acquisition unit 105a acquires the number of mounting points from the NC data 107a shown in FIG. 6, and assigns a large number of transport lanes to a board type having a large number of mounting points. did. However, the target tact acquisition unit 105 a may acquire the number of mounting points from the operator via the input unit 103. Further, the target tact acquisition unit 105a may allocate a large number of transport lanes to a substrate type having a large tact. Furthermore, the target tact acquisition unit 105a may allocate a predetermined number of transportation lanes regardless of the number of mounting points and the size of the tact.

  Further, in the present embodiment, the target tact acquisition unit 105a acquires the target tact for each transport lane when components are mounted on the two types of board types A and B. However, the number of board types may be three or more, and the target tact acquisition unit 105a determines one of the three or more board types for each transport lane and calculates the target tact. May be obtained. In determining the board type for each transport lane, a board type having a larger number of mounting points or a larger number of required boards may be assigned to a larger number of transport lanes, or may be assigned to a preset number of transport lanes. It may be.

  In the present embodiment, the target tact acquisition unit 105a calculates the target tact with the board transfer time between the component mounters 200 set to 0 s. However, the target tact acquisition unit 105a considers the transfer time and sets the target tact. May be calculated. Even in this case, for example, when the component mounter MC2 and the component mounter MC3 mount components on the board in the asynchronous mode, the transfer lane 216 is mounted while the transfer lane 215 is mounted. Transport in the transport lane 216 can be performed. That is, since the substrate 22 can be transported during mounting on the substrate 21 by the component mounter MC3, the transport time of the substrate 22 can be set to 0 s. In this way, for example, by transferring a board of a board type having a large tact due to a large number of mounting points to the transfer lane 215 and the transfer lane 216 and mounting in the asynchronous mode, the transfer time can be set to 0 s. The throughput of the entire component mounting system 10 can be improved.

  In the present embodiment, the inter-lane balance unit 105b determines the number of component mounting machines 200 so that the line tact is brought close to the target tact acquired by the target tact acquisition unit 105a. However, for example, when the line tact in each transport lane is to be brought close to the same value, the inter-lane balance unit 105b changes the number of component mounting machines 200 in each transport lane without setting the target tact. The line tact in the transportation lane may be calculated, and the process of changing the number of component mounting machines 200 in each transportation lane may be repeated until the difference between the line tacts becomes a predetermined threshold or less.

  In the present embodiment, the inter-lane balance unit 105b sets the initial number of component mounters 200, increases the number, and brings the line tact closer to the first target tact so that the component mounter 200 The number was decided. However, if the line tact is small with respect to the first target tact in the initial number of component mounting machines 200, the inter-lane balance unit 105b reduces the number to bring the line tact closer to the first target tact, The number of component mounters 200 may be determined. Further, the inter-lane balance unit 105b may determine the number of line tacts that approaches the first target tact without setting the initial number of component mounters 200.

  In the present embodiment, the inter-lane balance unit 105b increases the number of component mounting machines 200 and re-determines the number only when the changed line tact is larger than the second target tact. However, when the change line tact is equal to or less than the second target tact, the inter-lane balance unit 105b may decrease the number of component mounting machines 200 and re-determine the number.

  Further, in the present embodiment, the inter-lane balance unit 105b limits the number of component mounters 200 to the second threshold value or less, but the inter-lane balance unit 105b does not limit the number of component mounters 200. The number of component mounting machines 200 may be increased until the line tact becomes equal to or less than the second target tact.

  In the present embodiment, when the inter-lane balance unit 105b reduces the line tact in each transport lane to be equal to or less than the second target tact, the number of component mounting machines 200 is limited to be equal to or less than the second threshold. It was decided. However, the inter-lane balance unit 105b may limit the number of component mounting machines 200 when reducing the line tact in each conveyance lane to be equal to or less than the first target tact.

  In the present embodiment, the inter-lane balance unit 105b increases the number of component mounting machines 200 to bring the line tact closer to the target tact. However, the inter-lane balance unit 105b includes the number of component mounting machines 200. Instead of increasing the number of suction nozzles nz of the mounting heads 213a and 213b of the component mounter 200, the tact of the component mounter 200 is shortened and the line tact is made closer to the target tact. Good. In addition, when the line tact is smaller than the target tact, the inter-lane balance unit 105b may reduce the number of the suction nozzles nz to bring the line tact closer to the target tact.

  In the present embodiment, the inter-facility balance unit 105c reduces the line tact by rearranging the components between the component mounting machines 200, but the inter-facility balance unit 105c arranges the components. Alternatively, the line tact may be reduced by reducing the tact of the component mounter 200. For example, the inter-facility balance unit 105c may reduce the tact of the component mounter 200 by increasing the number of suction nozzles nz of the mounting heads 213a and 213b included in the component mounter 200. In addition, when the line tact is smaller than the target tact, the inter-facility balance unit 105c may reduce the number of the suction nozzles nz to bring the line tact closer to the target tact.

  In the present embodiment, the inter-facility balance unit 105c reduces the line tact by rearranging the components between the component mounters 200. However, the inter-facility balance unit 105c is the same type of component. May be divided into a plurality of component cassettes 212a and 212b to reduce the tact of the component mounter 200. Note that if the component mounter is a model (component mounter type) with a small number of component cassettes that can be mounted, for example, 20 stations, the number of component cassettes may not be increased. In this case, in order to increase the number of component cassettes, it is necessary to change the component mounter to a model having a large number of component cassettes that can be mounted, for example, 34 stations. In addition, when the line tact is smaller than the target tact, the inter-facility balance unit 105c may reduce the number of component cassettes to bring the line tact closer to the target tact.

  In the present embodiment, the inter-facility balance unit 105c reduces the line tact by rearranging the components between the component mounters 200. However, the inter-facility balance unit 105c is configured by the component mounter 200. The line tact may be made closer to the target tact by changing the type. That is, even in a component mounter having the same number of mounting heads with the same suction nozzle nz, the tact may be different if the model (type of component mounter) is different. This is because there are models that can mount components with a relatively fast tact, and models that can mount components only with a relatively slow tact. In this way, the tact difference from the target tact can be shortened by changing the type of the component mounter. In addition, since the transfer lane other than the transfer lane for which the tact difference is desired to be shortened is changed due to the change of the component mounting machine, the inter-facility balance unit 105c performs the tact change including the change of all the transfer lanes. Adjustments need to be made. However, this adjustment is not necessary when the component mounting machine to be changed does not mount components on a board that is transported on a transport lane other than the transport lane for which the tact difference is to be reduced.

  In the present embodiment, the component mounter 200 is an alternating component mounter. However, the component mounter 200 is not limited to an alternate component mounter, and is mounted on one board. On the other hand, it may be a component mounter that mounts components with one mounting head.

  In the present embodiment, one component mounting machine 200 is mounted only on one board type board. However, with one component mounting machine 200, components are mounted on a plurality of board type boards. You may decide to implement. By doing in this way, even when the number of the component mounting machines 200 becomes larger than the second threshold, the number of the component mounting machines 200 can be reduced to be equal to or less than the second threshold. Thereby, since the number of the component mounting machines 200 can be reduced, the cost of the entire component mounting system 10 can be reduced.

  The present invention can be applied to a mounting condition determination method in a production line having a component mounting machine equipped with a plurality of transport lanes for transporting a substrate in parallel. In particular, the throughput is reduced so that the throughput in the entire production line is maximized. The present invention can be applied to a mounting condition determination method that can be improved.

1 is an external view showing a configuration of a component mounting system according to an embodiment of the present invention. It is a top view which shows the main structures inside a component mounting machine. It is a schematic diagram which shows the positional relationship of a mounting head and a component cassette. It is a figure which shows the example of the component tape and the reel which accommodated components. It is a block diagram which shows the function structure of the mounting condition determination apparatus in this Embodiment. It is a figure which shows an example of NC data. It is a figure which shows an example of a component library. It is a figure which shows an example of target tact data. It is a flowchart which shows an example of operation | movement of the mounting condition determination apparatus in this Embodiment. It is a flowchart which shows an example of operation | movement of the mounting condition determination apparatus in this Embodiment. It is a flowchart which shows an example of operation | movement of the mounting condition determination apparatus in this Embodiment. It is a flowchart which shows an example of operation | movement of the mounting condition determination apparatus in this Embodiment. It is a figure which shows the component mounting system which has three component mounting machines. It is a figure explaining an example which brings the line tact in each conveyance lane close to the 1st target tact. It is a figure explaining an example which brings the line tact in each conveyance lane close to the 2nd target tact.

DESCRIPTION OF SYMBOLS 10 Component mounting system 21, 22, 23 Board | substrate 100 Mounting condition determination apparatus 101 Operation control part 102 Display part 103 Input part 104 Memory part 105 Program storage part 105a Target tact acquisition part 105b Balance part between lanes 105c Balance part between facilities 106 Communication I / F unit 107 Database unit 107a NC data 107b Component library 107c Target tact data 200 Component mounting machine 210a, 210b Mounting unit 211a, 211b Component supply unit 212a, 212b Component cassette 213a, 213b Mounting head 215, 216, 217 Transport lane

Claims (3)

Targeting a production line having a plurality of component mounting machines equipped with a plurality of transport lanes in parallel for transporting boards, each different type of board is transported on the assigned transport lane among the plurality of transport lanes, A method for determining mounting conditions of a component mounter for mounting components on the board,
The ratio of the line tact, which is the maximum mounting time of the mounting time of the component mounter required to mount a predetermined component on the substrate for each transport lane connected so that the same substrate is transported, An inter-lane balance step for determining a device configuration of a component mounter that mounts components on a substrate transported on the transport lane so as to approach a predetermined ratio;
Under the conditions of the equipment configuration determined in the inter-lane balance step, the mounting times of the plurality of component mounters that mount components on the substrate transported on the transport lane are the same value for each transport lane. An inter-facility balance step for determining the placement of the components on the plurality of component mounters so as to approach ,
A target tact acquisition step of acquiring a target tact that is a target value of a line tact determined for each of the transportation lanes from the predetermined ratio;
The balancing step between lanes includes:
A component that mounts a component on a board that is transported on the transport lane so that the line tact approaches the first target tact that is the initial target tact acquired in the target tact acquisition step for each transport lane. Including a number determination step for determining the number of mounting machines,
The target tact acquisition step includes:
A target production time acquisition step of acquiring a target production time which is a target value of a production time for each board type required to produce a board on which a predetermined component is mounted;
A substrate type determination step for determining a substrate type of a substrate to be transferred for each transfer lane;
For each transport lane, a lane number acquisition step for acquiring a lane number that is the number of transport lanes in which the same type of substrate as the substrate type determined in the substrate type determination step is transported;
For each of the transport lanes, the target production time of the substrate type transported on the transport lane acquired in the target production time acquisition step is multiplied by the number of lanes acquired in the lane number acquisition step. A target tact calculation step of calculating a target tact of
Mounting condition determining wherein a call. The inter-facility balance step includes:
For each of the transport lanes, a tact calculation step for calculating a mounting time required to mount a plurality of predetermined components on a board for each of the number of component mounting machines determined in the number determination step;
For each transport lane, the mounting time of one component mounter calculated in the tact calculating step is a value that is predetermined in advance than the mounting times of other component mounters calculated in the tact calculating step. A tact difference determination step for determining whether or not the threshold is greater than or equal to one threshold;
For each of the transportation lanes, when it is determined that the tact difference determination step is larger than the first threshold, as a condition for calculating the mounting time, a part of the plurality of predetermined parts is The mounting condition determination method according to claim 1 , further comprising: a component placement step of rearranging from one component mounter to the other component mounter. The target tact acquisition step includes:
A change line tact calculation step for calculating a change line tact that is a line tact after the parts are rearranged in the part placement step for each of the transport lanes;
The target tact after the change in one transportation lane in which the changed line tact is calculated is set to the same value as the changed line tact, and the ratio of the target tact after the change in the plurality of transportation lanes is the plurality of transportation lanes. A changed target tact calculation step of calculating a second target tact that is a target tact after the change in the plurality of transportation lanes so as to be equal to the ratio of each first target tact,
The lane balancing step further includes:
A change line tact determination step for determining whether or not the change line tact is equal to or less than the second target tact for each conveyance lane;
For each of the transport lanes, when the changed line tact determination step determines that the changed line tact is not less than or equal to the second target tact, the number of units is set so that the line tact is less than or equal to the second target tact. The mounting condition determining method according to claim 2 , further comprising a unit re-determining step of re-determining the number of component mounting machines determined in the determining step from the determined unit number to the changed unit number.

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