JP7386384B2 - Component mounting system, component mounting device, and mounting board manufacturing method - Google Patents

Description

The present invention relates to a component mounting system and a component mounting apparatus for mounting components arranged on a tray onto a board, and a method for manufacturing a mounting board.

In a component mounting apparatus that manufactures a mounting board in which components are mounted on a board, large components and irregularly shaped components with complex shapes such as connectors are supplied while being arranged on a tray (for example, see Patent Document 1). ). The component mounting apparatus described in Patent Document 1 supplies the odd-shaped parts to the component mounting apparatus by storing the odd-shaped parts in the recesses of a tray in which the recesses for storing the odd-shaped parts are formed in the same direction and at equal intervals. By aligning the orientations of odd-shaped components placed on the tray, the mounting work in the component mounting apparatus can be simplified.

Japanese Patent Application Publication No. 2008-211066

However, in the conventional technology including Patent Document 1, parts are aligned on the tray and arranged at equal intervals, so in the case of irregularly shaped parts that are not simple rectangles, the gaps between the parts become large and it is difficult to arrange them on the tray. There are problems in that the number of parts decreases, the work to replace the tray increases, and the production efficiency of the mounting board decreases.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a component mounting system, a component mounting apparatus, and a method for manufacturing a mounted board that can efficiently produce a mounted board on which components of a complicated shape are mounted.

The component mounting system of the present invention includes a plurality of patterns based on pattern data indicating a pattern including at least a first component arranged on a tray and a second component having an outer edge shape different from that of the first component. are arranged at predetermined intervals on the tray, and a plurality of the first parts and a plurality of the first parts included in the plurality of patterns arranged on the tray are developed. tray data creation means for creating tray data indicating the positions of the second parts , and the positions of the plurality of first parts and the plurality of second parts indicated by the tray data created by the tray data creation means; and mounting means for taking out at least one of the plurality of first components and the plurality of second components from the tray and mounting the same on a board.

The component mounting apparatus of the present invention includes a plurality of patterns based on pattern data indicating a pattern including at least a first component arranged on a tray and a second component having an outer edge shape different from that of the first component. a plurality of the first parts included in the plurality of patterns arranged on the tray, which are created by developing the pattern data such that the first parts are arranged at predetermined intervals on the tray; The plurality of first parts and the plurality of second parts are removed from the tray based on the positions of the plurality of first parts and the plurality of second parts indicated by the tray data indicating the positions of the second parts. At least one of the two components is taken out and mounted on a board.

A method for manufacturing a mounted board according to the present invention includes pattern data creation for creating pattern data indicating a pattern including at least a first component arranged on a tray and a second component having an outer edge shape different from that of the first component. a step of developing the pattern data so that the plurality of patterns are arranged on the tray at predetermined intervals; a tray data creation step of creating tray data indicating the positions of the parts and the plurality of second parts ; and the positions of the plurality of first parts and the plurality of second parts indicated by the created tray data. and a mounting step of taking out at least one of the plurality of first components and the plurality of second components from the tray and mounting it on a board based on the method.

According to the present invention, it is possible to efficiently produce a mounting board on which components having a complicated shape are mounted.

Configuration explanatory diagram of a component mounting system according to an embodiment of the present invention Configuration explanatory diagram of a component mounting apparatus according to an embodiment of the present invention A block diagram showing the configuration of a component mounting apparatus according to an embodiment of the present invention An explanatory diagram of an example of a tray that supplies components to a component mounting apparatus according to an embodiment of the present invention An explanatory diagram for deriving tray data used in a component mounting apparatus according to an embodiment of the present invention An explanatory diagram of an example of pattern data used in a component mounting apparatus according to an embodiment of the present invention An explanatory diagram of an example of virtual area data used in a component mounting apparatus according to an embodiment of the present invention An explanatory diagram of an example of tray data used in a component mounting apparatus according to an embodiment of the present invention An explanatory diagram of an example of another tray for supplying components to a component mounting apparatus according to an embodiment of the present invention An explanatory diagram of deriving tray data of other trays used in a component mounting apparatus according to an embodiment of the present invention An explanatory diagram of an example of pattern data of other trays used in the component mounting apparatus according to an embodiment of the present invention An explanatory diagram of an example of tray data of other trays used in a component mounting apparatus according to an embodiment of the present invention Flow diagram of a method for manufacturing a mounting board according to an embodiment of the present invention

An embodiment of the present invention will be described in detail below with reference to the drawings. The configuration, shape, etc. described below are examples for explanation, and can be changed as appropriate depending on the specifications of the component mounting system, component mounting device, and tray. Hereinafter, corresponding elements in all drawings will be denoted by the same reference numerals, and redundant explanation will be omitted. In FIG. 2 and some parts to be described later, the two axes that are orthogonal to each other in the horizontal plane are the X direction of the substrate transport direction (left-right direction in FIG. 2), and the Y direction (vertical direction in FIG. 2) orthogonal to the substrate transport direction. is shown.

First, the configuration of the component mounting system 1 will be explained with reference to FIG. The component mounting system 1 has a function of manufacturing a mounted board by mounting components on a board. The component mounting system 1 is configured by connecting a plurality of component mounting apparatuses M1 and M2. The component mounting apparatuses M1 and M2 are connected to a management computer 3 via a communication network 2. The management computer 3 not only comprehensively manages the manufacturing of mounting boards by the component mounting system 1, but also creates various parameters used in the component mounting apparatuses M1 and M2. Note that the number of component mounting apparatuses M1 and M2 provided in the component mounting system 1 is not limited to two, and may be one, three or more.

Next, referring to FIG. 2, the configuration of the component mounting apparatus M1 will be described. The configuration of component mounting apparatuses M1 and M2 will be explained. The component mounting apparatus M1 and the component mounting apparatus M2 have similar configurations, and the component mounting apparatus M1 will be described here. In the component mounting apparatus M1, a board transport mechanism 5 is installed in the center of the base 4 in the X direction. The board transport mechanism 5 transports the board 6 carried in from the upstream side in the X direction, and positions and holds the board 6 at a mounting work position by a mounting head, which will be described below. Further, the board transport mechanism 5 transports the board 6 on which the component mounting work has been completed to the downstream side. Component supply units 7 are installed on both sides of the board transport mechanism 5, respectively.

A plurality of tape feeders 8 are installed in both component supply units 7 in parallel in the X direction. The tape feeder 8 pitch-feeds a carrier tape in which pockets for storing components are formed in a direction (tape feeding direction) from outside the component supply section 7 toward the board transport mechanism 5, so that the mounting head picks up the components. Supplies parts to the parts extraction position. Further, one of the component supply sections 7 is equipped with a tray feeder 10 that supplies a tray 9 that holds components D such as large components and irregularly shaped components such as connectors in alignment to a component extraction position. In the tray 9, concave storage portions 9a (see FIG. 4) formed to match the shape of the parts D are formed at predetermined intervals, and the parts D are placed in each storage portion 9a. .

In FIG. 2, a Y-axis table 11 equipped with a linear drive mechanism is arranged at both ends of the upper surface of the base 4 in the X direction. A beam 12 similarly equipped with a linear mechanism is coupled to the Y-axis table 11 so as to be movable in the Y direction. A mounting head 13 is attached to the beam 12 so as to be movable in the X direction. The mounting head 13 is equipped with a plurality of suction units (not shown) that can hold the component D, move up and down, and rotate around a vertical axis (Z-axis). A suction nozzle (not shown) that suctions and holds the component D is attached to the lower end of each suction unit.

The Y-axis table 11 and the beam 12 constitute a mounting head moving mechanism that moves the mounting head 13 in the horizontal direction (X direction, Y direction). The mounting head moving mechanism and the mounting head 13 constitute a component mounting mechanism 14 that performs a component mounting operation of taking out the component D from the component supply section 7 and mounting it on the mounting position of the board 6. During component mounting work, the mounting head 13 moves above the component supply section 7, picks up a predetermined component D with each suction nozzle, moves above the board 6, and picks up a predetermined component D held by each suction nozzle. direction and repeat a series of turns to mount each mounting position.

In FIG. 2, a head camera 15 is mounted on the beam 12 and is located on the lower surface side of the beam 12 and moves integrally with the mounting head 13. As the mounting head 13 moves, the head camera 15 moves above the board 6 positioned at the mounting work position of the board transport mechanism 5, and images a board mark (not shown) provided on the board 6. to recognize the position of the board 6.

A component recognition camera 16 is installed between the component supply section 7 and the board transport mechanism 5. The component recognition camera 16 images the component D held by the suction nozzle from below when the mounting head 13 that has taken out the component D from the component supply section 7 is positioned above the component recognition camera 16. In the component mounting work of the component D on the board 6 by the mounting head 13, the mounting position is corrected by taking into consideration the recognition result of the board 6 by the head camera 15 and the recognition result of the component D by the component recognition camera 16.

In FIG. 2, a touch panel 17 operated by a worker is installed at a position where the worker works on the front side of the component mounting apparatus M1. The touch panel 17 displays various information on its display, and an operator uses operation buttons displayed on the display to input data and operate the component mounting apparatus M1.

Next, with reference to FIG. 3, the configuration of the component mounting apparatuses M1 and M2 will be described. The component mounting apparatus M1 and the component mounting apparatus M2 have similar configurations, and the component mounting apparatus M1 will be described here. A board transport mechanism 5, a component supply section 7, a component mounting mechanism 14, a head camera 15, a component recognition camera 16, and a touch panel 17 are connected to a control device 20 included in the component mounting apparatus M1. The control device 20 includes a mounting data storage section 21, a tray data creation section 22, and a mounting control section 23. The mounting data storage unit 21 is a storage device, and stores production data 21a, pattern data 21b, virtual area data 21c, tray data 21d, and the like.

The production data 21a includes the production model name of the mounting board, the part name (type) of the component D mounted on the board 6, the supply position of the component D in the component supply section 7 (mounting position of the tape feeder 8, tray feeder 10, etc.). ), size of component D, mounting position (XY coordinates), mounting direction, mounting order, etc. The tray data creation unit 22 creates tray data including information such as the position and direction of the component D to be stored in the tray 9.

Here, the creation of tray data for the tray 9A by the tray data creation section 22 will be described with reference to FIGS. 4 to 8. In FIG. 4, a plurality of storage parts 9a are regularly formed in a tray 9A to store a plurality of parts D1 to D18, which are L-shaped irregular parts. The plurality of storage parts 9a are formed so that the plurality of parts D1 to D18 are alternately rotated by 180 degrees and stored therein. Thereby, the plurality of parts D1 to D18 can be efficiently stored in the tray 9A.

In FIG. 5, the component D2 is stored in the tray 9A with the component D1 rotated by 180 degrees with the center C between the components D1 and D2 as the center of rotation. The target component holding position P2 when the suction nozzle holds the component D2 is also located at a position obtained by rotating the component holding position P1 of the component D1 by 180 degrees (arrow a) about the center C as the rotation center. The component D1 and the component D2 fit within a virtual rectangular area A1 (hereinafter simply referred to as "virtual area A1"). Hereinafter, the parts D1 to D18 in the virtual areas A1 to A9 will be referred to as patterns, the part D1 in the virtual area A1 will be referred to as a first part Q1, and the part D2 will be referred to as a second part Q2.

That is, the first component Q1 and the second component Q2 are arranged in the virtual areas A1 to A9, respectively. Note that the first component Q1 and the second component Q2 on the tray 9A may be the same component D, or may be different components D with the same outer edge shape. That is, the first component Q1 (component D1) and the second component Q2 (component D2) are components D having at least the same outer edge shape. The outer edge of the first component Q1 and the outer edge of the second component Q2 are rotationally symmetrical.

FIG. 6 shows pattern data 21b created by the tray data creation unit 22 and indicating a pattern including a first component Q1 (component D1) and a second component Q2 (component D2) arranged on the tray 9A. ing. In the pattern data 21b, component holding position coordinates 31 and component direction 32 are stored for each component number 30. The component holding position coordinates 31 are the XY coordinates (X coordinate 31x, Y coordinate 31y) of the component holding positions P1 and P2 of the component D1, which is the first component Q1, and the component D2, which is the second component Q2, in the tray 9A. be. The part direction 32 of the first part Q1 is 0°, and the part direction 32 of the second part Q2 is 180°. The tray data creation unit 22 stores the created pattern data 21b in the mounting data storage unit 21. Note that the pattern data 21b may be created by an operator.

In FIG. 5, nine virtual areas A1 to A9 are arranged at equal intervals on the tray 9A so as not to overlap with each other. That is, the parts D1 to D18 stored in the tray 9A are arranged at predetermined intervals (ΔX, ΔY) in the X direction and the Y direction in the virtual area A1 where the first part Q1 and the second part Q2 are arranged. The arrangement is the same as the arrangement of the first component Q1 and the second component Q2 that were repeatedly arranged in . Note that adjacent virtual areas A1 to A9 may have boundaries touching each other as long as they do not overlap with each other. That is, each pattern fits within virtual areas A1 to A9 (virtual rectangular areas) that do not overlap with each other on the tray 9A.

FIG. 7 shows virtual area data 21c created by the tray data creation unit 22 and including the positions of virtual areas A1 to A9 in the tray 9A. The virtual area data 21c stores virtual area coordinates 34 for each area number 33 specifying the virtual areas A1 to A9. The virtual area coordinates 34 are the XY coordinates (X coordinate 34x, Y coordinate 34y) of the virtual areas A1 to A9 with the virtual area A1 as the origin (0,0). The tray data creation unit 22 stores the created virtual area data 21c in the mounting data storage unit 21. Note that the virtual area data 21c may be created by an operator.

FIG. 8 shows tray data 21d created by the tray data creation unit 22 based on the pattern data 21b and the virtual area data 21c and indicating the positions of a plurality of parts D1 to D18 arranged on the tray 9A. The tray data 21d stores component holding position coordinates 36 (X coordinate 36x, Y coordinate 36y) and component direction 37 for each component number 35. The tray data creation unit 22 arranges and develops the pattern data 21b shown in FIG. 6 at the virtual area coordinates 34 of the virtual area data 21c shown in FIG. 7, and calculates the component holding position coordinates 36.

In this way, the tray data creation unit 22 develops the pattern data 21b based on the pattern data 21b so that the patterns are arranged at equal intervals (ΔX, ΔY) on the tray 9A, and This tray data creation means creates tray data 21d indicating the positions of the plurality of first parts Q1 and the plurality of second parts Q2 arranged in the tray. The tray data creation unit 22 causes the packaging data storage unit 21 to store the created tray data 21d.

In FIG. 3, the mounting control section 23 controls the component mounting mechanism 14 based on the production data 21a and the tray data 21d, and sequentially holds the components D1 to D18 stored in the storage section 9a of the tray 9A using the suction nozzle. Then, a component mounting operation is performed in which the components D1 to D18 that have been taken out are mounted at mounting positions on the board 6. More specifically, the mounting control unit 23 takes out the components D1 to D18 from the tray 9A based on the component holding position coordinates 36 of the tray data 21d, and operates the suction nozzle based on the component direction 37 of the taken out components D1 to D18. It is rotated and mounted on the board 6 in a predetermined direction.

In this way, the mounting control section 23 and the component mounting mechanism 14 select the plurality of first components Q1 and the plurality of second components Q2 indicated by the tray data 21d created by the tray data creation section 22 (tray data creation means). Mounting in which at least one component D1 to D18 of the plurality of first components Q1 and the plurality of second components Q2 is taken out from the tray 9A and mounted on the board 6 based on the position (component holding position coordinates 36). It is a means. The component mounting apparatuses M1 and M2 then load the plurality of first components Q1 and the plurality of second components from the tray 9A based on the positions of the plurality of first components Q1 and the plurality of second components Q2 indicated by the tray data 21d. At least one component D1 to D18 out of the two components Q2 is taken out and mounted on the board 6.

Next, the creation of tray data 21d for another tray 9B (hereinafter simply referred to as "tray 9B") by the tray data creation section 22 will be described with reference to FIGS. 9 to 12. For convenience, the description of the storage section 9a in FIG. 9 is omitted. In FIG. 9, a plurality of parts D21 to D32, which are L-shaped irregularly shaped parts and T-shaped irregularly shaped parts, are regularly arranged on the tray 9B.

In FIG. 10, in the virtual area A11, there are an L-shaped first component Q3 (component D21), a T-shaped third component Q4 (component D22), and an L-shaped second component Q5 (component D23) is placed. The first part Q3 and the second part Q5 are in a line-symmetrical relationship with respect to an axis L in the Y direction passing through the center of the virtual area A11. That is, the outer edge of the first component Q3 and the outer edge of the second component Q5 are line symmetrical. The component holding position P21 of the component D21 which is the first component Q3 and the component holding position P23 of the component D23 which is the second component Q5 are also in a line symmetrical relationship with respect to the axis L. The third component Q4 has a line-symmetrical shape with respect to the axis L.

FIG. 11 is pattern data 21b showing a pattern including a first component Q3 (component D21), a second component Q5 (component D23), and a third component Q4 (component D22) arranged on the tray 9B. . In the pattern data 21b of the tray 9B, component holding position coordinates 41 (X coordinate 41x, Y coordinate 41y) and component direction 42 are stored for each component number 40. The component directions 32 of the first component Q3, the second component Q5, and the third component Q4 are all 0°.

In FIG. 10, four virtual areas A11 to A14 are arranged on the tray 9B at equal intervals (ΔX1, ΔY1) so as not to overlap each other. A first component Q3, a second component Q5, and a third component Q4 are arranged in each of the virtual areas A11 to A14.

In FIG. 12, the tray data creation unit 22 developed and created the pattern data 21b based on the pattern data 21b of the tray 9B so that the patterns are arranged at equal intervals (ΔX1, ΔY1) on the tray 9B. , is tray data 21d showing a plurality of L-shaped first parts Q3, a plurality of L-shaped second parts Q5, and a plurality of T-shaped third parts Q4 arranged on the tray 9B. . In the tray data 21d of the tray 9B, component holding position coordinates 44 (X coordinate 44x, Y coordinate 44y) and component direction 45 are stored for each component number 43.

As described above, in this embodiment, a pattern is created based on pattern data 21b indicating a pattern including at least first parts Q1, Q3 and second parts Q2, Q5 arranged on trays 9A, 9B. The pattern data 21b is developed so as to be arranged at equal intervals on the trays 9A, 9B, and the plurality of first parts Q1, Q3 and the plurality of second parts Q2 are arranged on the trays 9A, 9B. , Q5 (component holding position coordinates 36, 44) is created. As a result, it is possible to efficiently produce a mounting board on which components D1 to D18 and D21 to D32 having complicated shapes are mounted.

In the above description, the component mounting apparatuses M1 and M2 are provided with tray data creation means (tray data creation section 22), but the management computer 3 may be provided with the tray data creation means. In that case, the tray data creation means of the management computer 3 creates the tray data 21d, and the tray data 21d sent from the management computer 3 is stored in the mounting data storage sections 21 of the component mounting apparatuses M1 and M2.

Next, a method for manufacturing a mounting board using the component mounting system 1 will be described along the flowchart of FIG. 13 and with reference to FIGS. 4 to 12. In the following description, the management computer 3 is provided with tray data creation means, and the component mounting device M1 mounts the components D1 to D18 placed on the tray 9A onto the board 6.

First, the tray data creation means creates pattern data 21b indicating a pattern including a first component Q1 and a second component Q2 placed on the tray 9A (ST1: pattern data creation step) (FIG. 5, (See Figure 6). In the pattern data creation step (ST1), pattern data 21b is created so that the pattern fits within a virtual rectangular area (virtual area A1). In the pattern data creation step (ST1), the pattern data 21b is created so that the outer edge of the first component Q1 and the outer edge of the second component Q2 are rotationally symmetrical. Note that in the tray 9B, in the pattern data creation step (ST1), the pattern data 21b is created so that the outer edge of the first component Q3 and the outer edge of the second component Q5 have a line-symmetrical relationship (see FIGS. 11).

In FIG. 13, the tray data creation means then develops the pattern data 21b so that the patterns are arranged at equal intervals (ΔX, ΔY) on the tray 9A, and Tray data 21d indicating the positions (component holding coordinate positions 36) of one component Q1 and a plurality of second components Q2 is created (ST2: tray data creation step). In the tray data creation step (ST2), the tray data 21d is created by arranging the virtual areas A1 to A9 at equal intervals (ΔX, ΔY) on the tray 9A so that the virtual areas A1 to A9 do not overlap each other ( (See Figures 5 and 8).

Next, the management computer 3 transfers the tray data 21d to the component mounting apparatus M1 (ST3: tray data transfer step). The transferred tray data 21d is stored in the mounting data storage section 21. Next, in the component mounting apparatus M1, the mounting means (mounting control unit 23, component mounting mechanism 14) determines the positions (component holding position coordinates 36) of the plurality of first components Q1 and the plurality of second components Q2 indicated by the tray data 21d. Based on this, at least one component D1 to D18 of the plurality of first components Q1 and the plurality of second components Q2 is taken out from the tray 9A and mounted on the board 6 (ST4: mounting step). The mounting means repeats the mounting step (ST4) until the mounting of all scheduled components is completed (Yes in ST5) (No in ST5). As a result, it is possible to efficiently produce a mounting board on which components D1 to D18 having complicated shapes are mounted.

As described above, the component mounting system 1 of the present embodiment uses a pattern based on the pattern data 21b indicating a pattern including at least the first component Q1 and the second component Q2 arranged on the tray 9A. are arranged at equal intervals (ΔX, ΔY) on the tray 9A, and the plurality of first parts Q1 and the plurality of second parts Q2 are arranged on the tray 9A. a tray data creation unit (tray data creation unit 22) that creates tray data 21d indicating the position (component holding position coordinates 36), and a plurality of first parts Q1 and a plurality of second parts Q2 indicated by the tray data 21d. Mounting means (mounting control unit 23, A component mounting mechanism 14) is provided.

As a result, it is possible to efficiently produce a mounting board on which components D1 to D18 having complicated shapes are mounted.

INDUSTRIAL APPLICABILITY The component mounting system, component mounting apparatus, and method for manufacturing a mounted board of the present invention have the effect of efficiently producing a mounted board on which components with a complicated shape are mounted, and are useful in the field of mounting components on a board. Useful.

1 Component mounting system 6 Board 9, 9A, 9B Tray 14 Component mounting mechanism (mounting means)
D1-D18, D21-D32 Components Q1, Q3 First component Q2, Q5 Second component M1, M2 Component mounting device

Claims (7)

Based on pattern data indicating a pattern including at least a first component arranged on the tray and a second component having an outer edge shape different from that of the first component, a plurality of the patterns are arranged on the tray in a predetermined shape. A tray that shows the positions of the plurality of first parts and the plurality of second parts included in the plurality of patterns arranged on the tray by developing the pattern data so that they are arranged at intervals. a tray data creation means for creating data;
The plurality of first parts and the plurality of second parts are extracted from the tray based on the positions of the plurality of first parts and the plurality of second parts indicated by the tray data created by the tray data creation means. 2. A component mounting system, comprising: mounting means for taking out at least one component of the second component and mounting it on a board. 2. The component mounting system according to claim 1, wherein each pattern of the tray data fits within a virtual rectangular area on the tray that does not overlap with each other. 2. The component mounting system according to claim 1 , wherein in the pattern, an outer edge of the first component and an outer edge of the second component are line symmetrical. Based on pattern data indicating a pattern including at least a first component arranged on the tray and a second component having an outer edge shape different from that of the first component, a plurality of the patterns are arranged on the tray in a predetermined shape. the positions of the plurality of first parts and the plurality of second parts included in the plurality of patterns arranged on the tray, which are created by developing the pattern data so as to be arranged at intervals; At least one of the plurality of first parts and the plurality of second parts is removed from the tray based on the positions of the plurality of first parts and the plurality of second parts indicated by the tray data indicating A component mounting device that picks up two components and mounts them on a board. a pattern data creation step of creating pattern data indicating a pattern including at least a first component placed on the tray and a second component having an outer edge shape different from the first component;
Developing the pattern data so that the plurality of patterns are arranged at predetermined intervals on the tray, and forming a plurality of the first parts included in the plurality of patterns arranged on the tray. a tray data creation step of creating tray data indicating the positions of the plurality of second parts ;
Based on the positions of the plurality of first parts and the plurality of second parts indicated by the created tray data, one of the plurality of first parts and the plurality of second parts is removed from the tray. A method for manufacturing a mounted board, including a mounting step of taking out at least one component and mounting it on the board. In the pattern data creation step, the pattern data is created so that the pattern falls within a virtual rectangular area;
6. The mounting board manufacturing method according to claim 5 , wherein in the tray data creation step, the tray data is created by arranging the regions on the tray at predetermined intervals so that the regions do not overlap with each other. 6. The method for manufacturing a mounted board according to claim 5 , wherein in the pattern data creation step, pattern data is created so that an outer edge of the first component and an outer edge of the second component are line symmetrical.

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