JP2014236132A - Printed-circuit board coating device, coating method of printed-circuit board and printed-circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the coating operation time by reducing the man-hours needed to the teaching before implementation assembly and the coordinate input.SOLUTION: A printed-circuit board coating device for coating a printed-circuit board with a coating agent includes a printed-circuit board coating section, a control section, and a coating program generating section. The printed-circuit board coating section has a coating nozzle, the coating program generating section has a processing section, and a storage section, and the processing section reads the design data of the printed-circuit board, and generates a coating program for controlling the coating nozzle by using the design data and the data in the storage section.

Description

  The present invention relates to a printed board coating apparatus, a printed board coating method, and a printed board.

  Conventionally, when applying a moisture-proofing agent to the surface of a printed circuit board that has been mounted and assembled using a coating apparatus, teaching of operating points and creation of an operating program have been performed. There are three types of point teaching: remote teaching and direct teaching that are performed online using the apparatus, and coordinate value input that does not use the apparatus offline.

  Remote teaching is teaching performed by moving the coating head to a target point on a substrate using an operation key or the like. Direct teaching is teaching performed by turning off the motor of the manipulator and directly moving the coating head to a target point by hand. The coordinate value input is teaching performed by inputting a numerical value of the coordinate value without moving the apparatus.

  Since remote teaching and direct teaching use devices, production must be stopped while teaching is being performed. On the other hand, coordinate value input is off-line teaching that does not use a device and does not stop production. However, it requires a lot of man-hours because it requires a lot of coordinate input. It is necessary to work while incorporating various correction values in consideration of the above.

  In Patent Document 1, the coordinate input is limited only to the input of the coordinate value indicating the substrate outer shape, the application-prohibited area, etc., the coordinates of the application area are calculated based on the input value, and then the coordinate value conversion according to the operation of the apparatus is performed. By creating an operation program, it is possible to reduce the man-hours for inputting coordinate values and facilitate the work. However, Patent Document 1 only discloses the coordinate calculation means of the application area, and does not disclose the movement route calculation means of the application head.

JP-A-6-140750

  In Patent Document 1, first, a printed circuit board is assumed to be a collection of grids determined from the coating width and the like, a grid that can be coated is calculated in consideration of the board outer shape and the coating prohibited area, the coordinate value of the coating area is calculated, In the case where there is a remaining portion, a means is used in which the portion is set as a supplemental application region and a supplemental application coordinate value is calculated. With this means, the supplemental amount is applied in the reverse direction, and there has been a problem that the moving distance of the application head is extended and the lead time for substrate production is increased. Further, in Patent Document 1, it is necessary to input the substrate outline and the coordinates of the application-prohibited area using the printed circuit board after mounting assembly, and there is a problem that teaching before mounting assembly cannot be performed, and the number of man-hours still directly input by the operator There was also a problem that it was necessary.

  An object of the present invention is to reduce the man-hours related to teaching and coordinate input before mounting assembly and to reduce the coating operation time.

  The present invention relates to a printed circuit board coating apparatus that applies a coating agent to a printed circuit board, and includes a printed circuit board coating unit, a control unit, and an application program generation unit, and the printed circuit board coating unit includes an application nozzle, The application program generation unit has a processing unit and a storage unit, and the processing unit reads the design data of the printed circuit board and generates an application program for controlling the application nozzle using the design data and the data of the storage unit. It is characterized by doing.

  According to the present invention, man-hours for teaching and coordinate input before mounting and assembly can be reduced.

  Further, according to the present invention, not only the man-hours related to teaching but also the application operation time can be reduced.

It is a block diagram which shows the printed circuit board coating apparatus of an Example. It is a block diagram which shows the detail of a coating program production | generation part. It is a top view which shows the specific example of the application | coating route production | generation of a printed circuit board. It is a top view which shows the specific example of the application | coating route production | generation of a printed circuit board. It is a top view which shows the specific example of the root | route which can apply | coat the printed circuit board. It is a top view which shows the specific example of what was selected to the minimum necessary among the routes which can apply | coat the printed circuit board. It is a top view which shows the application order of a printed circuit board. It is a figure which shows the example of a processing flow which determines the employ | adopted route | root of the right end of each group among the selection means of an application | coating route. It is a figure which shows the example of a processing flow which determines the employ | adopted route | root of the left end of each group among the selection means of an application | coating route. It is a figure which shows the example of a processing flow which determines the employ | adopted route between right-and-left end employable routes among the selection means of an application | coating route. It is sectional drawing which shows the printed circuit board after coating.

  The present invention relates to a printed circuit board coating apparatus provided with a program for automatically generating a program describing application control information from CAD data of a printed circuit board.

  According to the present invention, it is possible to reduce teaching man-hours and coordinate input man-hours before mounting and assembling by fetching coordinate information from CAD data of a printed circuit board. Furthermore, according to the present invention, it is possible to shorten the moving distance of the coating nozzle by coating the entire coating region in a continuous operation while allowing the coating to be overlapped, instead of being supplemented.

  Hereinafter, it will be described in detail with reference to the drawings as appropriate.

  FIG. 1 is a configuration diagram illustrating a printed circuit board coating apparatus.

  In this figure, 1 is a printed circuit board coating unit, 2 is a control unit (computer) of the printed circuit board coating unit 1, and 3 is an application program generating unit.

  The printed circuit board coating unit 1 discharges a coating agent such as a viscous fluid by the application nozzle 4 and performs application on the printed circuit board 6 disposed on the base 5. The application nozzle 4 can move in the XY direction (horizontal direction) and move up and down in the Z-axis direction (vertical direction). After moving to a predetermined position on the printed circuit board 6, the application nozzle 4 is lowered to a predetermined height, The coating agent can be applied onto the printed circuit board 6 by quantitatively discharging the coating agent while moving in the direction.

  The control unit 2 can control the movement of the coating nozzle 4 in the XY direction, the elevation in the Z-axis direction, and the start and end of the coating agent discharge. Further, by reading the application program described in a predetermined format, the application nozzle 4 can be automatically controlled according to the contents written in the program.

  The application program generating unit 3 can create the application program of the present invention. The created program data is sent from the coating program generation unit 3 to the control unit 2 via the network 7. The means for sending data to the control unit 2 is not limited to being via a network, but may be recorded on a CD, DVD, USB memory or the like and transported. Moreover, the control part 2 and the application | coating program production | generation part 3 may incorporate these functions in one computer.

  Next, the function of the application program generating unit 3 will be described.

  FIG. 2 is a block diagram illustrating an example of a detailed configuration of the coating program generation unit 3 of FIG.

  The application program generation unit 3 includes a processing unit 30 and a storage unit 40.

  The processing unit 30 includes a coordinate capturing unit 31, an application route generation unit 32, and a programming unit 33 as functions. The processing unit 30 is configured by a CPU (Central Processing Unit) and a main memory (not shown), and each unit in the processing unit 30 is realized by developing data stored in the storage unit 40 in the main memory.

  The coordinate information capturing unit 31 captures coordinate information from the CAD data 8 of the printed circuit board, such as a board outline and an application-prohibited area where a coating agent set for each object such as a component should not be applied, to the coordinate data DB 41. It has a function to memorize. In this specification, “DB” represents a database (Data Base). 3A to 3E, the X coordinate has a positive direction on the right side in the figure, and the Y coordinate has a positive direction on the upper side in the figure.

  The CAD data is numerically recorded printed circuit board design data. The present invention makes it possible to reduce the man-hours for teaching and coordinate input by using this CAD data.

  The application route generation unit 32 has a function of acquiring the coordinate information of the application region from the coordinate data DB 41, acquiring the setting values of the application width and the minimum application length from the parameter DB 42, and generating a movement route of the application nozzle. In addition, the application route generation unit 32 stores the generated application route in the application route DB 43. Details of the method for generating the coating route will be described later.

  The programming unit 33 acquires the initial arrangement coordinates of the application nozzle, the run-up distance, the application start correction distance, and the application end correction distance from the parameter DB 42, acquires the application route from the application route DB 43, and is read by the control unit 2 shown in FIG. The application program 9 has a function of generating an application program 9 in which instructions such as the movement direction and movement distance of the application nozzle and the start and end of application are described. The control unit 2 reads the application program 9 and issues a command to automatically apply to the application area in accordance with this.

  The storage unit 40 is a storage device such as a hard disk or an SSD (Solid State Drive), and stores a coordinate data DB 41, a parameter DB 42, and a coating route DB 43.

  The coordinate data DB 41 stores the coordinate information acquired from the CAD data 8 of the printed circuit board via the coordinate information acquisition unit 31 in association with the applicability information. The coordinate value is a feature point (corner coordinate) constituting each object.

  Table 1 shows an example of the coordinate data DB 41. The unit of data relating to the dimensions in the table is millimeters (mm).

  The parameter DB 42 includes various parameters determined from the mechanical specifications of the printed circuit board coating unit 1, the viscosity of the coating agent, and the like. The application width, the minimum application length, the initial arrangement coordinates of the application nozzle, the run-up distance, the application start correction distance, The application end correction distance is stored. The application width is the lateral width of the coating agent discharged from the application nozzle, and the minimum application length is the minimum length necessary for application. The run-up distance is the distance that must be accelerated in order to apply at a constant speed, and the application start correction distance is the deviation between the position where the coating agent was discharged from the nozzle and the position where it actually landed on the substrate. The application end correction distance is a distance required to correct the deviation of the application end position caused by the inertia of the coating agent.

  Table 2 shows an example of the parameter DB 42. The unit of data relating to the dimensions in the table is millimeters (mm).

  In this table, the coating width is 6 mm and 2 mm. The coating width can be controlled by exchanging the coating nozzle and adjusting the spray angle of the coating nozzle and the distance of the printed circuit board to be coated. In addition, when the application width is 6 mm, the application is impossible, but the area that needs to be applied can be applied by changing the application width to 2 mm.

  The application route DB 43 stores the application route generated by the application route generation unit 32. The application route stores the application order of each route and the coordinate information of the start point and end point of the route in association with each other.

  Table 3 shows an example of the application route DB 43. The unit of data relating to the dimensions in the table is millimeters (mm).

(Generation of application route)
Next, application route generation processing, which is a basis for generating an application program, will be described with reference to the drawings. Here, although one Example of this invention is described, this invention is not limited to this.

(1) Setting of unit cell FIG. 3A shows a 25 mm × 30 mm printed circuit board to be coated. Reference numeral 10 denotes an application prohibited area, and 11 denotes an application area. Such coordinate information is stored in the coordinate data DB 41.

  FIG. 3B shows a case where the grid of “X = 1 mm, Y = 1 mm” is assumed to be a unit cell 12 for application and the region is divided by the unit cell 12 for the application region 11 of FIG. 3A. However, both X and Y are variable depending on the application accuracy. Hereinafter, coating is performed with reference to the unit cell.

(2) List of routes that can be applied Next, all routes that can be applied without protruding the application region are listed based on the application width (in the case of 6 mm) and the minimum application length stored in the parameter DB.

  Here, it is assumed that six grids are set as the coating width and six grids are set as the minimum coating length. In this case, it is not possible to apply to a range smaller than the range shown in the minimum application range 13 (lower right hatched portion) in FIG. 3B. Moreover, the arrow of FIG. 3B has shown the example of the route | root which an application nozzle performs application | coating, and the grating | lattice shown by x has shown the grating | lattice apply | coated at this time.

  FIG. 3C lists all routes that can be applied in consideration of the minimum application range determined by the application width and the minimum application length. The direction of application is only the Y-axis direction, and it is not determined here whether the Y-axis is positive or negative.

  By enumerating all the routes that can be applied, a region that is not applied by any route, such as the non-applicable region 14 (upwardly hatched portion) in FIG. 3C, is revealed. This area is set as an unapplicable area, and the coordinate information is presented to the user. In addition, about this area | region, it can apply | coat by replacing | exchanging a coating nozzle with the nozzle which can apply | coat a fine location, and applying the present invention by making the parameters of a coating width and minimum coating length small.

(3) Grouping of application routes Next, the enumerated routes are grouped.

In the definition of grouping, as shown in FIG. 3C, routes having the same start point and end point Y coordinate values and adjacent to each other are grouped. Then, G ₁ , G ₂ , G ₃ ... G _n and an index are allocated in order from the group having the smallest X coordinate value of the left end route of each group. When the X coordinate value of the left end route is the same, an index is assigned in order from the group with the smallest Y coordinate value of the starting point.

(4) Selection of application route Next, the application route is selected from the routes of each group to the minimum necessary route for applying all the application areas. By selecting the minimum required route, it is possible to save the coating agent and reduce the time required for application.

  The route selection algorithm will be described with reference to the flowcharts of FIGS.

  As a premise, the variables used in the flowchart will be described.

i is the index of the group. Further, root (i, j) is the jth route from the left of the group G _i , and max _i is the total number of routes included in the group G _i . L _i is the leftmost route among the routes adopted by the group G _i , and R _i is the rightmost route among the routes adopted by the group G _i .

First, the flowchart of FIG. 4 will be described. Here, in consideration of the positional relationship between the group to the right, to adjust the adoption route R _i.
In step S401, the index i is set to “1” as an initial value. Note that i takes a value of 1 to n (total number of groups).

In step S402, the left end route root (i, 1) of the group G _{i and} the right end route root (i, max _i ) of the group G _i are set as initial values of L _i and R _i .

In step S403, it is determined whether there is a group G _{i + 1 on the} right side to be compared. If it is determined that the right adjacent group G _{i + 1} exists, the process proceeds to step S404. If it is determined that the right adjacent group G _{i + 1} does not exist, the process proceeds to the flowchart of FIG. 5 (reference A in the figure). .

In step S404, it determines the root total max _i of the group _{G i} is whether or not "1". If the root total max _i of the group _{G i} is determined to be "1", the process proceeds to step S409, the case where the root total max _i of the group _{G i} is determined not to be "1", the processing proceeds to step S405 .

In step S405, it determines whether the group is present which includes the right group G _i. Here, the state that “the group G _a includes the right side of the group G _b ” indicates that the rightmost route of the group G _{b and} the leftmost route of the group G _a are adjacent to each other, and “Y of the group G _a It is defined that “minimum coordinate value ≦ minimum Y coordinate value of group G _b ” is satisfied and “maximum Y coordinate value of group G _a ≧ maximum Y coordinate value of group G _b ” is satisfied. If it is determined that there is a group that includes the right side of the group G _i , the process proceeds to step S406. If it is determined that there is no group that includes the right side of the group G _i , the process proceeds to step S409. .

In step S406, it is determined whether or not “max _i −5” is less than 2. If it is determined that “max _i −5” is less than 2, the process proceeds to step S408. If it is determined that “max _i −5” is not less than 2, the process proceeds to step S407.

In step S407, as the root of _{R i,} group _{G i} 6 th root root (i, _max i -5) from the right end of setting a. Then, the process proceeds to step S409.

In step S408, as the root of _{R i,} it sets the root of the _{L i.} Then, the process proceeds to step S409.

  In step S409, a value obtained by adding “1” to the index i is set to the index i. Then, the process returns to step S402.

Next, the flowchart of FIG. 5 will be described. Here, in consideration of the positional relationship with the group on the left, the L _i adoption route is adjusted.

  In step S501, the index i is set to “2” as an initial value.

In step S502, it is determined whether or not group G _i exists. If it is determined that the group G _i exists, the process proceeds to step S503. If it is determined that the group G _i does not exist, the process proceeds to the flowchart of FIG. 6 (reference numeral B in the drawing).

At step S503, it determines the root total max _i of the group _{G i} is whether or not "1". If the root total max _i of the group _{G i} is determined to be "1", the process proceeds to step S508, the case where the root total max _i of the group _{G i} is determined not to be "1", the processing proceeds to step S504 .

In step S504, it determines whether the group is present which includes a left group G _i. Here, the state that “the group G _a includes the left side of the group G _b ” indicates that the leftmost route of the group G _b and the rightmost route of the group G _a are adjacent to each other, and “Y of the group G _a It is defined that “minimum coordinate value ≦ minimum Y coordinate value of group G _b ” is satisfied and “maximum Y coordinate value of group G _a ≧ maximum Y coordinate value of group G _b ” is satisfied. If it is determined that there is a group that includes the left side of group G _i , the process proceeds to step S505. If it is determined that there is no group that includes the left side of group G _i , the process proceeds to step S508. .

In step S505, it determines whether or not the "X-coordinate value +6 route L _i" is greater than "X-coordinate value of the root of R _i '. Here, 6 is added because the unit grid is 1 mm × 1 mm and the coating width is 6 grids. If it is determined that “the X coordinate value of the route of L _i +6” is larger than the “X coordinate value of the route of R _i ”, the process proceeds to step S507, and the “X coordinate value of the route of L _i +6” is “ If it is determined that the X coordinate value of the root of R _i 'is less, the process proceeds to step S506.

At step S506, as the root of _{L i,} it sets the sixth root root from the left end of the group _{G i (i,} 6).

At step S507, the as the root of _{L i,} sets a route _{R i.}

  In step S508, a value obtained by adding “1” to the index i is set to the index i. Then, the process returns to step S502.

Next, the flowchart of FIG. 6 will be described. Here, the route to be adopted is selected from the routes between L _i and R _i of each group.

  In step S601, the index i is set to “1” as an initial value.

In step S602, it is determined whether or not group G _i exists. If it is determined that the group G _i exists, the process proceeds to step S603. If it is determined that the group G _i does not exist, the process ends.

In step S603, it is determined whether the same route is set for L _i and R _i . If it is determined that the same route is set to L _i and R _i, the process proceeds to step S605, if it is determined that the same route to L _i and R _i is not set, the processing in step S604 move on.

In step S604, both the routes set in L _i and R _i are adopted. Then, the process proceeds to step S606.

At step S605, employs only configured route to _{L i.} Then, the process proceeds to step S607.

In step S606, among the routes between L _i and R _i , the route at the position of 6 squares from the route set to L _i is adopted. Then, the process proceeds to step S607.

  In step S607, a value obtained by adding “1” to the index i is set to the index i. Then, the process returns to step S602.

  With the above algorithm, it is possible to select the necessary routes from all the listed routes.

  FIG. 3D shows the selected route.

(5) Setting of application order and direction of each route Next, the application order and direction of each adopted route are set.

  The application order is such that application is performed from the route having the smallest X coordinate value toward the positive direction of the X coordinate.

  FIG. 3E shows the above application sequence.

  As the application direction for each route, the positive and negative directions of the Y coordinate are alternately repeated in order from the route having the smallest X coordinate value, as indicated by the solid line arrow in FIG. 3E. At this time, when there are a plurality of routes having the same X coordinate value, the coating is continuously performed in the same direction. The application direction is determined according to the rule that the positive and negative directions are alternately repeated, as in the other routes.

  By alternately setting the application direction, the application nozzle can be moved without waste, and the movement distance of the application nozzle can be shortened. The broken line arrow indicates the movement of the application nozzle without application.

  The printed circuit board obtained by applying as shown in FIG. 3E has a limited application direction, so that a part of adjacent coatings overlap, and the coating film thickness in the cross section perpendicular to the application direction is It will be uneven.

  FIG. 7 shows a cross section in a direction orthogonal to the direction of application including the coating portion of the printed circuit board.

  In this figure, a printed circuit board 70 includes a substrate 71 having wiring and a coating 72 (coating film). The coating 72 has a flat portion 73 and a plurality of convex portions 74.

  When the coating nozzle is applied by reciprocating with a predetermined width as shown in FIG. 3E, in order to prevent a portion where the coating 72 is not formed and the substrate 71 is exposed, it is next to the case where the coating is applied in one direction. When applying, a part of the coating 72 (for example, about 0.5 mm in width) is applied so as to overlap. By applying in this way, the convex part 74 is formed. The plurality of convex portions 74 are linear and are formed in parallel. Such a cross-sectional shape is unique to the printed circuit board manufactured according to the present invention.

  3A to 3E, the database shown in Tables 1 to 3 and other intermediate processes may be displayed on the screen or the like attached to the control unit or the application program generating unit. Here, the display or the like is also called a screen display unit. Thereby, it is possible to visually check whether the control is appropriate.

  1: printed circuit board coating unit, 2: control unit, 3: application program generation unit, 4: application nozzle, 5: base, 6: printed circuit board, 7: network, 8: CAD data, 9: application program, 10: Application prohibited area, 11: Application area, 12: Unit lattice, 13: Minimum application range, 14: Application impossible area, 30: Processing section, 31: Coordinate information fetching section, 32: Application route generating section, 33: Programming section, 40: storage unit, 41: coordinate data DB, 42: parameter DB, 43: application route DB.

Claims (15)

  An apparatus for applying a coating agent to a printed circuit board, comprising a printed circuit board coating unit, a control unit, and an application program generating unit, wherein the printed circuit board coating unit includes an application nozzle, and generating the application program The unit includes a processing unit and a storage unit, and the processing unit reads the design data of the printed circuit board, and controls the application nozzle using the design data and the data of the storage unit. A printed circuit board coating apparatus.   The printed circuit board coating apparatus according to claim 1, wherein the design data includes coordinate information of an outer shape of the printed circuit board and a coating prohibited area.   The printed circuit board according to claim 2, wherein the processing unit divides a coating area of the printed board into unit grids, lists routes where the coating area can be coated, and extracts areas where coating is impossible. Coating equipment.   The printed circuit board coating apparatus according to claim 3, wherein the processing unit selects a minimum necessary route for applying all the areas that can be applied from the route.   The printed circuit board coating apparatus according to claim 4, wherein the processing unit determines a coating direction so that a moving distance of the coating nozzle is shortened.   The printed circuit board coating apparatus according to claim 3, wherein the control unit reads the application program from the processing unit and issues a command to apply to the application region according to the application program. .   The printed circuit board according to any one of claims 1 to 6, wherein the control unit or the application program generation unit includes a screen display unit and can display a progress on the screen display unit. Coating equipment.   A method of applying a coating agent to a printed circuit board using a printed circuit board coating apparatus comprising a printed circuit board coating unit, a control unit, and an application program generating unit, the design data of the printed circuit board being read, A method for coating a printed circuit board, comprising: generating a coating program for controlling a coating nozzle.   9. The method of coating a printed circuit board according to claim 8, wherein the design data includes coordinate information of an outer shape of the printed circuit board and a coating prohibited area.   10. The method of coating a printed circuit board according to claim 9, wherein the application area of the printed circuit board is divided by a unit lattice, enumeration routes of the application area are enumerated, and unapplicable areas are extracted.   11. The method for coating a printed circuit board according to claim 10, wherein a minimum necessary route is selected in order to completely apply a region that can be applied from the route.   12. The method of coating a printed circuit board according to claim 11, wherein the direction of application is determined so that the moving distance of the application nozzle is shortened.   The method for coating a printed circuit board according to any one of claims 10 to 12, wherein a command to apply to the application region is issued according to the application program.   A printed circuit board comprising: a substrate having wiring; and a coating film, wherein the coating film has a plurality of projections, and the plurality of projections are linear and parallel.   The printed circuit board according to claim 14, wherein the coating film is formed by the method for coating a printed circuit board according to any one of claims 8 to 13.

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