JP2011124357A - Method and machine for mounting electronic components - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently operate a plurality of head units with superposing working areas, and to maintain a high operating ratio. <P>SOLUTION: The operating ranges R(x) of the head units 22A and 22B moving on a printed-circuit board P are allocated at every head unit 22A and 22B. Weight is conducted with heights capable of generating mutual interferences of the head units as the degrees of interferences for every coordinates of the allocated operating ranges R(x). In loading operations in the coordinates capable of generating the mutual interferences of the head units, the loading operations are conducted in the coordinates having the highest degree of interference in either of the head units 22A and 22B while the loading operations are conducted within a range capable of avoiding the interference with one head unit 22A or 22B in the other head units 22A and 22B on the basis of the order of loadings. The priority capable of conducting loading operations in the region having the highest degree of interferences is imparted alternately to each of the head units 22A and 22B with respect to the order of loading in this case. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic component mounting method and an electronic component mounting machine, and in particular, an electronic component that simultaneously drives a plurality of head units on a single substrate and performs mounting operations of components adsorbed on each head unit. The present invention relates to a mounting method and an electronic component mounting machine.

  Conventionally, this type of electronic component mounting apparatus has a board stop position at which a board conveyed by a conveyor is stopped, and a plurality of modules arranged around the board stop position (in a mounting machine, the board stops at the board stop position). In order to mount components on the printed circuit board P, at least a component supply unit and a head unit for transporting and mounting components from the component supply unit to the substrate are required. A unit including the same is referred to as a “module”). Each module is provided with a head unit and a component supply unit. Each head unit picks up one or more components supplied from the corresponding component supply unit, moves onto the substrate stopped at the substrate stop position, and mounts the components in parallel. Each module is set to execute a plurality of mounting turns in parallel with other modules, with a series of operations from suction to mounting by the head unit as one mounting turn.

  However, since the head unit of each module needs to move in an interference area that overlaps each other, when any head unit is operating in such an interference area, the other head units have a waiting time. Had occurred.

  In order to reduce the waiting time as much as possible, for example, in the technique disclosed in Patent Document 1, the end time of the mounting turn executed by the preceding head unit in the interference area is measured, and the interference area Calculate the movement time for the subsequent head unit waiting for the vacant space to move to the interference area, and start the movement of the subsequent head unit when the time obtained by subtracting the movement time from the end time has elapsed. Time is reduced.

  Further, in the technique disclosed in Patent Document 2, an interference area is dynamically set for each mounting turn, and a method of reducing the chance of waiting for a free space in the interference area is attempted.

JP 2002-171092 A JP 2007-53271 A

  However, in any case, the standby time has occurred. However, as long as such a waiting time remains, the operating rate of each head unit is lowered, and the work efficiency is inevitably reduced.

  In addition, in the methods described in Patent Documents 1 and 2, it is necessary to perform arithmetic processing including the moving time of the head unit as a parameter for each mounting turn. However, the working time of the head unit varies greatly from one mounting turn to another and is not easily calculated. For this reason, the methods described in Patent Documents 1 and 2 cannot effectively reduce the standby time due to the time required for the arithmetic processing for each mounting turn.

  The present invention has been made in view of the above problems, and provides an electronic component mounting method and an electronic component mounting machine capable of efficiently operating a plurality of head units with overlapping work areas and maintaining a high operating rate. The issue is to provide.

  In order to solve the above-described problems, the present invention provides a component supply unit that supplies at least an electronic component and an electronic component supplied by the component supply unit that is mounted on a substrate that is sucked and stopped at a predetermined substrate stop position. A plurality of modules are arranged around the substrate stop position, each module is operated simultaneously, and the head unit is driven in parallel to the substrate stop position, and the head An electronic component mounting method for mounting an electronic component attracted by a unit on the substrate, and assigning an area of a head unit that moves on the substrate for each head unit, and for each coordinate of the assigned area, An interference level setting step for weighting the degree of possible interference between the head units as an interference level; A mounting order setting step for setting the order of mounting turns from the time when the electronic component supplied from the component supply unit of each corresponding module to the end of mounting is set as the mounting order; In the mounting operation at the coordinates where interference can occur, one of the head units is mounted at the coordinate with the highest interference based on the mounting order, and the other head unit is connected to the one head unit. A mounting step for performing a mounting operation within a range in which interference can be avoided, and the mounting order setting step alternately gives priority to the head unit so that the mounting operation can be performed in a region with the highest degree of interference. The electronic component mounting method is characterized in that the electronic component is mounted. In this aspect, in mounting work at coordinates where interference between head units can occur, one of the head units is mounted from the region with the highest degree of interference based on the mounting order set in the mounting order setting step. At the same time, the priority for mounting work in the high interference area is given to multiple head units in turn, so each head unit is equipped with electronic components in order from the high interference area in series. It becomes possible to continue. As a result, while avoiding interference between the head units, the standby time can be reduced as much as possible and a high operating rate can be maintained. In addition, since the mounting work is executed in order from the region with the highest degree of interference, the degree of freedom for determining the mounting order increases as the work elapses, and a more efficient mounting work can be realized. In addition, since the mounting order is determined in advance and a plurality of head units are operated according to the mounting order, the calculation is much easier and faster than the case where the mounting order is controlled using the movement time as a parameter. In addition, it is possible to avoid waiting time with high accuracy.

  In a preferred aspect, the mounting step is configured such that when the other head unit performs a mounting operation within a range where interference with the one head unit can be avoided, the other head unit is coordinated with the highest degree of interference. This is the step of mounting work. In this aspect, when one head unit is performing a mounting operation with coordinates with a high degree of interference, the other head units that are retracted also perform a mounting operation with coordinates with a high degree of interference within a range where interference is possible. There is an advantage that the degree of freedom for setting the mounting order becomes higher as a result of the mounting order shifting to the coordinates having a low interference degree sequentially with the coordinates having a high degree of interference as the center.

  In a preferred aspect, the interference degree setting step sets the area so that the mounting time of each head unit is equally divided with respect to a region having the highest interference degree. In this aspect, since the mounting times of the plurality of head units are equally divided, the mounting end timings of the respective head units are more easily aligned.

  Another aspect of the present invention includes a component supply unit that supplies at least an electronic component, and a head unit that is mounted on a substrate that sucks and stops the electronic component supplied by the component supply unit at a predetermined substrate stop position. A plurality of modules are arranged around the substrate stop position, and each module is operated simultaneously, and the head unit is driven in parallel to the substrate stop position to be attracted to the head unit. The electronic component mounting machine for mounting the electronic component on the board includes a control unit for controlling the head unit, and the control unit includes an area allocated for each head unit moving on the board, and The degree of interference weighted as the degree of possible interference between the head units for each coordinate of the area, and based on the degree of interference A data storage unit for storing a mounting order as a mounting turn order from when the electronic component supplied from the component supply unit of the corresponding module to each head unit is mounted until the mounting is completed; In the mounting operation at the coordinates at which interference between the head units can occur, based on the mounting order, one of the head units is mounted at the coordinate with the highest degree of interference, and the other head units are A program storage unit for storing a mounting program for performing a mounting operation within a range in which interference with the head unit can be avoided, and the mounting order is a priority order in which the mounting work can be performed in a region having the highest degree of interference Is a mounting device for electronic parts, which is given to the head unit by turns. Also in this aspect, it becomes possible to continue to mount electronic components in order from the region where each head unit is in series and has a high degree of interference. As a result, while avoiding interference between the head units, the standby time can be reduced as much as possible and a high operating rate can be maintained. In addition, since the mounting work is executed in order from the region with the highest degree of interference, the degree of freedom for determining the mounting order increases as the work elapses, and a more efficient mounting work can be realized. In addition, since the mounting order is determined in advance and a plurality of head units are operated according to the mounting order, the calculation is much easier and faster than the case where the mounting order is controlled using the movement time as a parameter. In addition, it is possible to avoid waiting time with high accuracy.

  In a preferred aspect, the control unit moves the other head unit at a coordinate having the highest degree of interference when the other head unit performs a mounting operation within a range where interference with the one head unit can be avoided. It will be loaded. In this aspect, when one head unit is performing a mounting operation with coordinates with a high degree of interference, the other head units that are retracted also perform a mounting operation with coordinates with a high degree of interference within a range where interference is possible. There is an advantage that the degree of freedom for setting the mounting order becomes higher as a result of the mounting order shifting to the coordinates having a low interference degree sequentially with the coordinates having a high degree of interference as the center.

  In a preferred aspect, the area is set in the control unit so that the mounting time of each head unit is equally divided with respect to the region with the highest degree of interference. In this aspect, since the mounting times of the plurality of head units are equally divided, the mounting end timings of the respective head units are more easily aligned.

  As described above, according to the present invention, any of the head units starts mounting work from the area with the highest degree of interference, and the order of priority for mounting work in the high interference degree area is set for a plurality of head units. Since each head unit is given in turn, it is possible to continue mounting electronic components in order from the high interference level in series, so that it is easy and fast while avoiding interference between the head units. It is possible to reduce the standby time as much as possible with a proper arithmetic control and to maintain a high operation rate.

It is a top view which shows roughly an example of the mounting machine which concerns on this embodiment. FIG. 2 is a block diagram according to the embodiment of FIG. 1. FIG. 2 is an ER diagram showing a data structure according to the embodiment of FIG. 1. FIG. 4 is a view table based on the table shown in FIG. 3. It is a flowchart which shows the procedure which determines the interference candidate of the mounting coordinate which concerns on embodiment of FIG. It is a flowchart which shows the procedure which determines a mounting order based on the procedure of FIG. It is explanatory drawing of the mounting coordinate which shows the process of determining the interference candidate of mounting coordinate, (A) shows the setting of an area, (B) shows the setting of a group. It is explanatory drawing which shows the mounting process of the electronic component by this embodiment. It is explanatory drawing which shows the mounting process of the electronic component by this embodiment. 10 is a timing chart showing the process of FIGS. 8 and 9.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  A mounting machine 10 shown in FIG. 1 includes a base 11 and a board transfer device 12 that is arranged on the base 11 and transfers a printed board P to be mounted. The substrate transfer device 12 includes a pair of belt-type conveyors 12a and 12b that are parallel to each other, a transfer motor (not shown), a transmission mechanism that transmits the power of the transfer motor, and the like. By driving in synchronism, while supporting both sides of the printed board P by both conveyors 12a and 12b, the printed board P is transported in the board transport direction (from right to left in the example of FIG. 1). The printed board P is temporarily stopped at the board stop position indicated by the phantom line in FIG. 1 with an approximately board stop device, and the electronic board is mounted after the printed board P is held at the board stop position. ing. In the following description, the horizontal direction along the substrate transport direction is defined as the X-axis direction, and the horizontal direction orthogonal to the X-axis direction is described as the Y-axis direction.

  In order to stop the printed circuit board P carried in by the substrate transport device 12 at the substrate stop position, a stopper (not shown) is provided as a substrate stop device at a predetermined location inside the conveyors 12a and 12b. The stopper is displaceable between a state of projecting on both conveyors 12a and 12b and a state of being immersed under both conveyors 12a and 12b, and is driven by a stopper driving unit 14 (see FIG. 2) made of a cylinder or the like. It is like that. Further, at the substrate stop position, a substrate holding device (not shown) including a push-up pin or the like for floating and holding the printed circuit board stopped by the stopper from the substrate transfer device 12 is disposed. The holding device constitutes a substrate positioning device.

  The mounting machine 10 is provided with a pair of modules 20 </ b> A and 20 </ b> B that face each other with the substrate transfer device 12 interposed therebetween. Each of the modules 20A and 20B picks up electronic components from the component supply units 21A and 21B disposed on both sides of the board transfer device 12 and stops at the board stop position. Head units 22A and 22B mounted on the substrate P and drive mechanisms 30A and 30B for driving the head units 22A and 22B are provided. As described above, in the mounting machine, in order to mount the component on the printed circuit board P stopped at the substrate stop position, the component is supplied from at least the component supply unit 21A (21B) and the component supply unit 21A (21B). A head unit 22A (22B) for transporting and mounting on P is necessary, and in this embodiment, a unit including these component supply units 21A (21B) and the head unit 22A (22B) is referred to as a “module” 20A ( 20B).

  The component supply units 21A and 21B include multiple rows of tape feeders 23A and 23B. Each of the tape feeders 23A, 23B stores electronic components such as ICs, transistors, capacitors, etc. at predetermined intervals, leads the held tape from the reel to the component take-out section, and as the components are piped up by the head units 22A, 22B. The ratchet-type feeding mechanism is used to intermittently feed the tape.

  The head units 22A and 22B are arranged above the base 11 of the mounting machine 10, and will be described later so that electronic components can be picked up from the component supply units 21A and 21B and mounted on the printed board P at the board stop position. By the driving mechanisms 30A and 30B, the X-axis direction (the conveyance direction by the substrate conveyance device 12) and the Y-axis direction (the direction perpendicular to the X-axis on the horizontal plane) can be moved independently. .

  Each head unit 22A, 22B is provided with one or a plurality of nozzle members (not shown) so as to be movable up and down, and Z-axis servo motors 24A, 24B for raising and lowering the nozzle members and an R axis for rotating the nozzle members. Servo motors 25A and 25B are provided (see FIG. 2).

  The drive mechanisms 30A and 30B for driving the head units 22A and 22B include a pair of fixed rails 31A and 31B fixed on the base 11 and extending in the Y-axis direction, and ball screws attached to the fixed rails 31A and 31B. The shafts 32A and 32B are connected to the ends of the ball screw shafts 32A and 32B, and are arranged on the Y-axis servomotors 33A and 33B for rotating the ball screw shafts 32A and 32B, and the fixed rails 31A and 31B. And head unit support members 34A, 34B each having a nut portion (not shown) screwed into the ball screw shafts 32A, 32B. The head unit support members 34A and 34B are coupled to the ball screw shafts 35A and 35B extending in the X-axis direction and the ends of the ball screw shafts 35A and 35B to rotate the ball screw shafts 35A and 35B. X-axis servomotors 36A and 36B are provided, and nut portions (not shown) provided on the head units 22A and 22B are screwed onto the ball screw shafts 35A and 35B. The ball screw shafts 32A and 32B are rotated by the operation of the Y-axis servomotors 33A and 33B, the head unit support members 34A and 34B are moved in the Y-axis direction, and the operation of the X-axis servomotors 36A and 36B is performed. The ball screw shafts 35A and 35B rotate, and the head units 22A and 22B move in the X-axis direction with respect to the head unit support members 34A and 34B. Although not shown in the drawing, the head unit support members 34A and 34B are provided with guide members for guiding the head units 22A and 22B in the X-axis direction. The head units 22A and 22B are provided with the guide members. It is configured so that it can smoothly reciprocate in the X-axis direction.

  Next, as a stationary imaging means for imaging a specific part of the printed circuit board P from above when the printed circuit board P stops at the substrate stop position, a first substrate camera 41 (first camera) and a second substrate camera 42 are used. A (second camera) is suspended from a fixed position of the base 11. The first substrate camera 41 is in a position where the downstream corner portion can be imaged when the printed circuit board P stops at the substrate stop position, and the second substrate camera 42 is in a position where the printed circuit board P stops at the substrate stop position. Are arranged at positions where the middle part of the one side can be imaged.

  Each module 20A, 20B is equipped with a camera 43A, 43B for component recognition on the base 11, and after picking up the component by the head units 22A, 22B, the picked-up component is imaged by the camera 43A, 43B, and based on that component The displacement of the suction position can be checked.

  In addition, each of the head units 22A and 22B includes a moving camera 44A and 44B that captures a fiducial mark (a board recognition mark) attached to the printed circuit board P. The head units 22A and 22B of the modules 20A and 20B are provided. Each is equipped with. The moving cameras 44A and 44B are composed of a CCD or the like disposed downward on the side of the corresponding head units 22A and 22B, and move together with the head units 22A and 22B.

  Next, the control unit 50 that controls each unit will be described.

  Referring to FIG. 2, control unit 50 is constituted by a CPU or the like, and includes an arithmetic processing unit 51 connected to an external display unit 60, and data storage means for storing various data for board transfer, component mounting, and the like. 52, a mounting program storage means 53 for storing a mounting program, a motor control unit 54 for controlling each motor 24A, 24B, 25A, 25B, 33A, 33B, 36A, 36B, an external input / output unit 55, and data communication A unit 56 and an image processing unit 57.

  The arithmetic processing unit 51 manages arithmetic processing for executing a mounting program necessary for mounting electronic components on the printed circuit board P.

  The data storage means 52 stores data necessary for executing the installed program, a data aggregate (referred to as a table), and the like.

  The installed program storage means 53 stores an installed program executed by the arithmetic processing unit 51.

  The motor control unit 54 selects the motors 24A, 24B, 25B, 25A, 25B, 33A, 33B, 36A, 36B based on the signals from the encoders provided to the motors 24A, 24B, 25A, 33A, 33B, 36A, 36B 25A, 25B, 33A, 33B, 36A, and 36B are controlled. The external input / output unit 55 is connected to various sensors SN such as sensors for detecting the loading and unloading of the printed circuit board P as input elements, and to the stopper driving unit 14 as an output element. In addition to this, a conveyance drive mechanism, a conveyor interval adjustment drive mechanism, and the like, which are not shown, are also connected to the external input / output unit 55.

  The data communication unit 56 executes communication with a control computer that controls the plurality of mounting machines 10 and updates data.

  The image processing unit 57 is connected to the first board camera 41, the second board camera 42, the component cameras 43A and 43B, and the moving cameras 44A and 44B, and takes in signals indicating images from these cameras 41 to 44B. Then, predetermined image processing is performed, and the image data is sent to the arithmetic processing unit 51.

  Next, of the data stored in the data storage means 52, data that is deeply related to the present invention will be described. In the following explanation, data is assumed to be logically stored in a two-dimensional table format, each data collection (entity) is a table, the relationship between tables is related, and the items included in each table (Column) is called a field. In the figure, PK represents a primary key for uniquely specifying data in the table, and FK is a foreign key indicating a reference destination for constructing a relationship.

  Referring to FIG. 3, the data storage means 52 includes a head table 101 related to the head units 22 </ b> A and 22 </ b> B and a substrate table 102 related to the printed circuit board P. The head table 101 includes {head number, number of nozzles} as a field, and the head number for specifying the head units 22A and 22B to be controlled and the number of nozzles included in the head units 22A and 22B of the head number. Is remembered.

  The substrate table 102 includes {substrate product number, width, length} as a field, and stores specifications of the printed circuit board P for each product number of the printed circuit board P.

  Next, reference numeral 103 denotes an area table. The area table 103 stores, as an operating range R (x), an area in which the head units 22A and 22B move for each head number of the head table 101 and each substrate product number of the substrate table 102. For example, in the case of the mounting machine 10 shown in FIG. 1, since one printed circuit board P is mounted by two head units 22A and 22B, the area table 103 has an operating range R (x ) In a state such as R (a) and R (b). In the present embodiment, the operating range R (x) is set so that the mounting time of each head unit 22A, 22B is equally divided with respect to the component mounting region EB for each printed circuit board P, with the region having the highest interference degree as a boundary. Has been. As a result, the load time allocated to one head unit 22A (22B) and the other head unit 22B (22A) becomes equal, so that both head units 22A and 22B can finish the work at the same time without limitation. Become.

  Next, reference numeral 104 denotes a group table. The group table 104 stores a group G (m, Y) specified for each operating range R (x) stored in the area table 103. This group G (m, Y) refers to a collection of mounting coordinates of electronic components that can be mounted in one mounting turn by the head units 22A and 22B, as shown in FIG. 7B. The group G (m, Y) is divided so as to be aligned in the same row Y as much as possible. The group G (m, Y) is stored so that the column m is set in the X-axis direction and can be uniquely specified for each area by the value of the column m and the value of the row Y. The field of the group table 104 includes {movement time, mounting order}. The moving time when the head units 22A and 22B move to the group G (m, Y) and the mounting order (each head unit 22A, 22B mounting turn order) is registered. The control unit 50 determines and controls the operation order of the head units 22A and 22B with reference to the mounting order value.

  Furthermore, what should be noted in the present embodiment is that the degree of interference is set in multiple stages along the Y-axis direction for each group G (m, Y) (see FIG. 7). That is, the head units 22A and 22B approach the other side along the Y-axis direction at the substrate stop position, and interfere with each other near the center. Therefore, in this embodiment, several rows (1 to 4) Y are set along the Y-axis direction, and the numerical value of the row Y becomes smaller in the group G (m, Y) where the interference degree becomes higher. Is set.

  Reference numeral 105 denotes a mounting coordinate table. The mounting coordinate table 105 is mounting coordinates P (n, Y) set for each group table 104, and based on this data, the control unit 50 sets electronic components set for each group G (m, Y). The mounting coordinates P (n, Y) are specified, and the nozzles provided in the head units 22A and 22B are controlled. In this mounting coordinate table, the interference distance D (Y, L, R) is stored for each mounting coordinate P (n, Y). The interference distance D (Y, L, R) is such that the head unit 22A (22B) on which an electronic component is mounted at a certain mounting coordinate is operating at the coordinate with the highest degree of interference on the counterpart head unit 22B (22A). ). Here, the interference distance D (Y, L, R) includes not only the value related to the Y coordinate but also the left and right values L, R in the X-axis direction. As a result, even if the Y coordinate is the coordinate with the highest degree of interference, for example, the head units 22A and 22B in the row m in FIG. Thus, it can be determined that no interference occurs. In the illustrated example, since the length of the printed circuit board P in the X-axis direction is sufficiently long, in the row m shown in FIG. 7A, both are on the opposite side in the X-axis direction (for example, the operating range R Interference does not occur between G (1, 1) in (a) and G (3, 1) in the operating range R (b).

  106 is an interference candidate management table. The interference candidate management table 106 specifies a group G (m, Y) as an interference candidate that can interfere with the other head unit 22B, 22A for each group G (m, Y) of the head units 22A, 22B. Is.

  4 and 7B, for example, regarding the group G (1, 1) set in the operating range R (a) in which the head unit 22A performs the mounting operation, the counterpart head unit 22B Since interference occurs when moving to the group G (1, 1), in this case, the group G (1, 1) in the operating range R (a) is the group G (1, 1) in the operating range R (b). 1) is associated as an interference candidate. Further, the number of interference candidates G (m, Y) associated with each other is not limited to one, but may be plural. On the other hand, since no value is entered for the operating range R (x) that does not interfere at all, when a view table as shown in FIG. 4 is created by combining the tables, the value becomes a null value (null).

  As shown in FIG. 4, in the group table 104, the mounting order is determined for each group G (m, Y) in the operating range R (x). The control unit 50 controls the control elements of the modules 20A and 20B based on the mounting order.

  With reference to FIGS. 3, 5, and 7A, the mounting order is determined by the following procedure.

  First, the board part number of the printed board P to be manufactured is registered in the board table 102, and the coordinates of the electronic components mounted on the registered printed board P are input and registered in the mounted coordinate table 105 (step) S20).

  Next, operating ranges R (a) and R (b) are assigned to the registered printed circuit board P for each of the head units 22A and 22B, registered in the area table 103 and the mounting coordinate table 105, and the operating range R (A), R (b) and the mounting coordinates P (n, Y) are associated (step S21). Next, the mounting coordinates P (n, Y) are assigned to the group G (m, Y) for each operating range R (a), R (b), and the group G (m, Y) and the mounting coordinates P (n, Y) are assigned. Are associated with each other (step S22). At this stage, information about the mounting coordinates P (n, Y), the group G (m, Y), and the operating range R (x) as shown in FIG. 7B is registered.

  Next, a is assigned to the argument x, and the number of groups G (m, Y) is counted for the assigned area (steps S23 and S24). Thereafter, in order from the first column, the group G (m, Y) of the operation range R (x) of the other party that can interfere is searched (steps S25 and S26). In this search, all groups G (m, Y) that may cause interference are searched based on the interference distance D (Y, L, R) in the mounting coordinate table 105.

  The retrieved interference candidate G (m, Y) is stored in the interference candidate management table 106 (step S27). As a result, in the state shown in FIG. 4, the group G (m, Y) for each operating range R (a) and the operating range R (on the other side where interference occurs for each group G (m, Y). It becomes possible to associate the group G (m, Y) of b).

  Next, the column m is incremented (step S28), and the value is compared with the group number M counted in step S24 (step S29). When the value of the column m is smaller than the number M of groups, the process returns to step S26 and the above-described processing is repeated. If the value of the column m reaches the number of groups M or more, it is further determined whether or not the argument x is b, that is, whether or not the operation range R (x) has been set for both (step S30). When the argument x is b, the process is terminated. When the argument x is a, the argument x is set to b, and the process returns to step S24 (step S31). Thereby, also in the operating range R (b), the combination of groups in which interference occurs for all the groups G (m, Y) is detected and registered.

  Next, a flow for determining the order of mounting work will be described.

  Referring to FIG. 6, in this flow, first, the priority order of the plurality of head units 22A and 22B is set using arguments 1 and 2 representing the priority order, and the mounting order is initialized (step S40). ). By this step S40, the group G (m, Y) mounted on one head unit 22A is given priority first.

  Next, the variable S giving the mounting order is initialized (step S41).

  Next, the group G1 (m, Y) having the highest mounting order and the highest interference degree is searched (step S42). If there is a group G1 (m, Y) as a result of this search, the group G1 (m, Y) in the youngest column m is set to the first rank by the head unit 22A among them, in the case of YES in step S43. The mounting order is registered in the group table 104 (step S44). Next, in order to specify the group G2 (m, Y) of the other head unit 22B to be combined with this group G1 (m, Y), the group G2 (m, Y) that does not interfere with the registered group G1 (m, Y) ) Is retrieved from the interference candidate management table 106 (step S45). For example, when the group G1 (m, Y) is G (1, 1), as shown in FIG. 4 and FIG. 8 (A), G (1, 1), G (1, 2) And G (1,3) is retrieved.

  Next, when the group G2 (m, Y) is searched from this search result (YES in step S46), the mounting rank of the smallest group m among the searched groups G2 (m, Y) is determined. And registered in the group table 104 (step S47). Next, the variable S is incremented (step S48), and it is determined whether or not the mounting order is set for the group G (m, Y) having the interference candidate (step S49). In other words, for the group G (m, Y) in which no interference occurs, the mounting order can be set by another specification factor. Therefore, in this program, the mounting order is not set. For the remainder, for example, the mounting order may be set so that both head units 22A and 22B can finish the mounting operation as much as possible in consideration of the movement time and the like. Alternatively, the electronic components may be mounted on all groups by an appropriate method without setting the mounting order. Of course, the specification in step S49 may be changed, and the mounting order may be set for all groups G (m, Y) in the same procedure as in FIG.

  If the group G (m, Y) whose mounting order is not set remains, the priority order is changed and the process returns to step S42 (step S50), and the above-described processing is repeated. On the other hand, if it is determined in step S49 that the mounting order is set for all the operating ranges R (a) and R (b), the process is terminated.

  If there is no group in which the mounting order is not set in step S43 (NO in step S43), the process proceeds to step S49, and the group G (m, Y) of another area is left without changing the variable S. Set the mounting order.

  On the other hand, if there is no group for which the mounting order is not set in step S46 (NO in step S46), the process proceeds to step S48, the variable S is incremented, and then the process proceeds to step S49.

  The setting of the operating range R (x), the registration of interference candidates, and the setting of the mounting order as described above may be executed by the control unit 50 of the mounting machine 10 or the host having jurisdiction over production It may be executed by a computer, and data may be received by the communication unit 57.

  Next, an electronic component mounting operation by the mounting machine 10 according to the present embodiment will be described.

  Referring to FIG. 1, when printed circuit board P is transported from substrate transport device 12 and locked to the substrate stop position, control unit 50 causes component supply units 21A and 21B and head units 22A and 22B of modules 20A and 20B. In addition, the drive mechanisms 30A and 30B are driven, and the electronic components are simultaneously mounted in parallel on the stopped printed circuit board P. Specifically, based on the mounting order described above, the component supply units 21A and 21B supply electronic components for one mounting turn, and the head units 22A and 22B are supplied by driving the drive mechanisms 30A and 30B. The electronic components are picked up, transported to the group G (m, Y) corresponding to each electronic component, and mounted on the corresponding mounting coordinates P (n, Y).

  At this time, as shown in FIG. 4 and FIG. 8A, the initial mounting order is set by the setting procedure described above for the group G (1, 1) for the head unit 22A in the operating range R (a). The group G (3, 1) is set for the head unit 22B. Accordingly, the head units 22A and 22B simultaneously move in the approaching direction, and execute the mounting operation with the corresponding coordinates by changing the coordinates in the X-axis direction. Thereby, the mounting operation is executed at the same time in the region where the interference degree is the highest, without the head units 22A and 22B colliding with each other. In addition, in conjunction with the fact that each operating range R (a), R (b) is set to bisect the component mounting area EB in the Y-axis direction, each head unit 22A, 22B Movement time for transporting the sucked parts to the target groups G (1,1) and G (3,1), and the mounting work positions in the groups G (1,1) and G (3,1) after the mounting work Therefore, the movement time for adsorbing the next electronic component becomes equal to each other, and the standby time is more unlikely to occur (see FIG. 10).

  Next, as shown in FIG. 8B, the head unit 22A is mounted with the electronic components of group G (3, 1), and the head unit 22B is mounted with the electronic components of group G (1, 1). . Also in this mounting operation, since the head units 22A and 22B have different coordinates in the X-axis direction, it is possible to simultaneously mount electronic components in a region with the highest degree of interference without interfering with each other.

  Next, in the third mounting turn, as shown in FIG. 9A, for one head unit 22A, a group G (2, 1) is set, but for the other head unit 22B, Group G (1, 2) is set in order to avoid interference with the head unit 22A working in this mounting turn. Therefore, in this mounting turn, the mounting operation is performed in the group G (1, 2) having a low interference degree.

  Further, as is apparent from the flowchart shown in FIG. 6, since the priority for executing the mounting operation on the group G (m, Y) having a high interference degree is alternately changed, in the next mounting turn, FIG. As shown in B), the interference degree of one head unit 22A is lowered to set the group G (1, 2), and the other head unit 22B has the highest group G (2 , 1) is set, and the mounting operation in this area is executed.

  When all the mounting operations in the group G (m, Y) with a predetermined interference degree are completed, no interference occurs even if the head units 22A and 22B are freely operated. Thereafter, regardless of the interference degree. Continue the parallel processing and complete the installation work.

  As described above, according to the present embodiment, in the mounting operation at the coordinates where the interference between the head units 22A and 22B can occur, the mounting set by the mounting order setting step (steps S40 to S50 in the present embodiment). Based on the order, any one of the head units 22A, 22B starts the mounting work from the region with the highest interference degree, and the priority order of the mounting work in the region with the high interference degree is given to the plurality of head units 22A, 22B. Thus, the head units 22A and 22B can be mounted in series from the region having a high degree of interference in series. As a result, as shown in FIG. 9, while avoiding interference between the head units 22A and 22B, the standby time can be reduced as much as possible, and a high operating rate can be maintained. In addition, since the mounting work is executed in order from the region with the highest degree of interference, the degree of freedom for determining the mounting order increases as the work elapses, and a more efficient mounting work can be realized. Also, since the mounting order is determined in advance and the plurality of head units 22A and 22B are operated according to the mounting order, the calculation is much easier and faster than the case where the mounting order is controlled using the travel time as a parameter. In addition, it is possible to avoid the occurrence of the waiting time with high accuracy.

  Further, in the present embodiment, the mounting step is performed at the coordinates with the highest degree of interference when performing the mounting operation within a range where interference with the head units 22A and 22B with the other head units 22A and 22B can be avoided. I am letting. For example, when one head unit 22A is preferentially working in the group G (2, 1), the other head unit 22B is in the group G (1, 2) with the highest degree of interference in a range where interference does not occur. Working. For this reason, in this embodiment, there is an advantage that the degree of freedom for setting the mounting order becomes higher as a result of the mounting order shifting sequentially to the coordinates having a low interference degree centering on the coordinates having a high interference degree.

  In the present embodiment, the interference degree setting step sets the operating range R (x) so that the mounting times of the head units 22A and 22B are equally divided with respect to the region having the highest interference degree. More specifically, as shown in FIG. 7A, operating ranges R (a) and R (b) for dividing the printed circuit board P into two equal parts in the Y-axis direction are set. For this reason, in this embodiment, since the mounting times of the plurality of head units 22A and 22B are equally divided, the mounting end timings of the head units 22A and 22B can be more easily aligned.

  The above-described embodiment is merely a preferred specific example of the present invention, and the present invention is not limited to the above-described embodiment.

  For example, in another embodiment, the group G (1, 1) is set for the head unit 22A in the operating range R (a) as the initial mounting order, and the head unit 22B in the operating range R (b) is set. Group G (3, 4) is set, and the next mounting order is group G (1, 4) for head unit 22A, and group G (3, 1) for head unit 22B. Is set. Further, the next mounting order is set to group G (2, 1) for the head unit 22A, and group G (2, 4) is set to the head unit 22B. Group G (2, 4) is set for 22A, and group G (2, 1) is set for head unit 22B. As described above, in the operation ranges R (a) and R (b), when the mounting work for the columns 1 and 4 is completed, the mounting operations for the columns 2 and 3 are alternately performed. In this way, during the mounting operation, even when the head unit 22A and the head unit 22B overlap in the X direction, they can always be separated in the Y direction and can be prevented from interfering with each other. In particular, when mounting, the stop position of the head units 22A and 22B with respect to the mounting coordinates P (n, Y) changes in the X direction depending on which nozzle member is mounted first, and the positions overlap in the X direction. However, since the head units 22A and 22B are separated in the Y direction, they can be prevented from interfering with each other.

  Further, for example, as the setting of the mounting order, a method of determining not only by coordinates but also by considering the movement time may be adopted.

  It goes without saying that various modifications are possible within the scope of the claims of the present invention.

DESCRIPTION OF SYMBOLS 10 Mounting machine 12 Board | substrate conveyance apparatus 20A, 20B Module 22A, 22B Head unit 30A, 30B Drive mechanism 50 Control unit 51 Arithmetic processing part 52 Data storage means 53 Mounted program storage means 54 Motor control part 55 External input / output part 56 Image processing part 57 Data communication part G (m, Y) Group P (n, Y) Mounting coordinates P Printed circuit board R (x) Operating range

Claims (6)

A module including at least a component supply unit that supplies an electronic component, and a head unit that sucks the electronic component supplied by the component supply unit and mounts the electronic component on a substrate stopped at a predetermined substrate stop position; A plurality of the modules are arranged around the substrate stop position, the modules are simultaneously operated, the head unit is driven in parallel to the substrate stop position, and the electronic components sucked by the head unit are placed on the substrate. A method for mounting electronic components to be mounted,
Assigning the area of the head unit that moves on the substrate for each head unit, and for each coordinate of the assigned area, an interference degree setting step that weights the degree of interference between the head units as an interference degree,
A mounting order setting step for setting, as a mounting order, the order of mounting turns from the time when the electronic component supplied from the component supply unit of the corresponding module to each head unit is mounted according to the degree of interference; ,
In the mounting operation at the coordinates at which the interference between the head units can occur, based on the mounting order, one of the head units is mounted at the coordinate with the highest degree of interference, and the other head units are And a mounting step for performing mounting work within a range where interference with the head unit can be avoided,
The electronic component mounting method, wherein the mounting order setting step alternately gives priority to the head unit in which mounting work can be performed in a region having the highest degree of interference. The electronic component mounting method according to claim 1,
In the mounting step, when the other head unit performs a mounting operation within a range in which interference with the one head unit can be avoided, the other head unit is mounted with a coordinate having the highest degree of interference. An electronic component mounting method characterized by being a step. In the mounting method of the electronic component of Claim 1 or 2,
The electronic component mounting method, wherein the interference level setting step sets the area so that the mounting time of each head unit is equally divided with respect to a region having the highest interference level. A module including at least a component supply unit that supplies an electronic component, and a head unit that sucks the electronic component supplied by the component supply unit and mounts the electronic component on a substrate stopped at a predetermined substrate stop position; A plurality of the modules are arranged around the substrate stop position, the modules are simultaneously operated, the head unit is driven in parallel to the substrate stop position, and the electronic components sucked by the head unit are placed on the substrate. A mounting machine for electronic components to be mounted,
A control unit for controlling the head unit is provided.
An area allocated for each head unit moving on the substrate, an interference degree weighted as the degree of interference between each head unit for each coordinate of the area, and preset based on the interference degree, A data storage unit that stores a mounting order as a mounting turn order from the time the electronic component supplied from the component supply unit of each corresponding module to the end of mounting;
In the mounting operation at the coordinates at which interference between the head units can occur, based on the mounting order, one of the head units is mounted at the coordinate with the highest degree of interference, and the other head units are A program storage unit for storing a mounting program for performing a mounting operation within a range in which interference with the head unit can be avoided;
The mounting order of the electronic component is characterized in that the mounting order is such that a priority order in which the mounting operation can be performed in the region with the highest degree of interference is given to the head unit in turn. In the electronic component mounting machine according to claim 4,
The control unit causes the other head unit to be mounted at a coordinate with the highest degree of interference when the other head unit performs the mounting operation within a range where interference with the one head unit can be avoided. An electronic component mounting machine characterized by being a product. In the electronic component mounting machine according to claim 4 or 5,
The electronic component mounting machine according to claim 1, wherein the control unit is configured so that the mounting time of each head unit is equally divided with respect to a region having the highest degree of interference.

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