JPH0257360B2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to an electronic component automatic mounting machine that automatically mounts electronic components at predetermined positions on a printed wiring board according to a predetermined program and coordinate data.
The present invention relates to a coordinate data creation device for creating the coordinate data.

<Prior art> Conventionally, electronic component automatic mounting machines have been used to automatically mount electronic components at predetermined positions on a printed wiring board according to a predetermined program and coordinate data in order to mount electronic components on a printed wiring board. is used (see Japanese Unexamined Patent Application Publication Nos. 57-95693 and 60-34231).

There are two types of coordinate data creation devices for this type of automatic electronic component mounting machine as described below.

(b) While moving the taper pin in the X-axis and Y-axis directions of the printed wiring board, align and insert the taper pin into the insertion hole of the printed wiring board, and from the position where the taper pin has moved in the X-axis and Y-axis directions, move the component mounting position. Something to read the coordinates of (insertion hole).

(b) Move the printed wiring board or television camera in the X-axis and Y-axis directions, search for the insertion hole of the printed wiring board with the television camera, align the image of the insertion hole with the reference position on the TV screen, and then Y
A device that reads the coordinates of the component mounting position (insertion hole) from the axial movement position.

<Problems to be Solved by the Invention> However, although both methods (a) and (b) above are effective for printed wiring boards with insertion holes, Since there are no matching holes for printed wiring boards on which surface-mounted (adhesive) type electronic components are mounted, the only way to temporarily align them is to use the position of a pair of copper eyes (conductor lands) as a guide, and to temporarily align them in the center. Therefore, it is necessary to correct the coordinate data on the mounting machine during the actual mounting stage, which is extremely complicated.

In view of these conventional problems, it is an object of the present invention to provide a coordinate data creation device that can easily and accurately create coordinate data even for printed wiring boards that do not have insertion holes at component mounting positions. do.

<Means for Solving the Problems> Therefore, the present invention provides a television camera that photographs the component mounting surface of a printed wiring board, a television that displays the image photographed by the television camera,
a drawing means for drawing an alignment mark corresponding to an actual shape at a component mounting position on a printed wiring board; a superimposing means for superimposing the alignment mark drawn by the drawing means on a television screen; In order to match the alignment mark on the screen with the corresponding real image, the printed wiring board and the TV camera are connected to the X of the board.
A coordinate data creation device is constructed by providing a moving means for relative movement in the axial and Y-axis directions, and a storage means for reading the position moved by the moving means at the time of matching as coordinate data of a component mounting position.

<Function> In the above configuration, the method of searching for insertion holes or copper eyes at component mounting positions with a television camera is as described in (b) above.
It is similar to , but instead of aligning it with the reference position on the TV screen, a matching mark with the same shape as the insertion hole or copper eye is drawn using a drawing method, and then superimposed on the TV screen using a superimposing method. , match this alignment mark with the actual image and read its coordinates.

<Example> An example of the present invention will be described below based on the drawings.

In Figure 1, 1 is an electronic component automatic mounting machine.
This is an XY table, and the printed wiring board P positioned and held on this table can be moved in the X-axis and axial directions. During mounting, the control section 2 moves the XY table 1 according to the program and coordinate data stored in the storage device 3 such as a floppy disk unit, and the electronic component is mounted by a mounting head (not shown) above the XY table 1. It is mounted on a printed wiring board P. If the electronic component is a chip component, the component is mounted after applying adhesive with an adhesive application head (not shown).

A television camera 4 is fixedly placed above the XY table 1 when creating coordinate data, and photographs the component mounting surface of the printed wiring board P.

Reference numeral 5 denotes a television, which displays images taken by the television camera 4 and has a superimpose function.

Reference numeral 6 denotes a personal computer, which includes a drawing means for drawing alignment marks having the same shape as the insertion holes and copper eyes actually located at component mounting positions on the printed wiring board P, and displaying the drawn alignment marks on the screen of the television 5. It is used as a superimposing means to superimpose on top.

The XY table 1 is used as a moving means for aligning the alignment mark and the corresponding real image on the screen of the television 5 when creating coordinate data, and the storage device 3 is used to complete alignment. It is used as a storage means for reading the moving position of the XY table 1 in the X-axis and Y-axis directions at the time as coordinate data of the component mounting position.

When creating coordinate data, first, alignment marks are drawn using the personal computer 6 and the television 5. In the case of insertion holes, by specifying the pitch between the holes and the hole diameter, alignment marks as shown in FIG. 2A, for example, are drawn. In the case of copper eyes, the shape, pitch, etc. can be specified, or alignment marks can be drawn freely, such as those shown in FIG. 2, B, C, or D, for example. Note that the coordinates are determined depending on where the drawing is drawn relative to the intersection of the reference lines, and what is actually read are the coordinates of the actual position corresponding to the intersection.

Next, a printed wiring board P for which coordinate data is to be created is set on the XY table 1, and alignment marks for component mounting positions for which coordinate data are to be created are superimposed on the screen of the television 5 by the personal computer 6. At this time, since the component mounting surface of the printed wiring board P photographed by the television camera 4 is displayed on the screen of the television 5, move the XY table 1 in an appropriate direction.
The alignment mark on the screen of the television 5 and the corresponding real image are made to match. If it matches, XY
By storing the movement position of the table 1 in the storage device 3 as coordinate data of the component mounting position, coordinate data is created.

In this embodiment, the television camera 4 is fixed and the printed wiring board P is moved two-dimensionally by the XY table 1, but the printed wiring board P is fixed and the television camera 4 is moved two-dimensionally. The coordinate data may be read from the movement position of the television camera 4.

Further, the coordinate data creation device according to the present invention may be used when modifying coordinate data created by another means.

<Effects of the Invention> As explained above, according to the present invention, alignment marks that have the same shape as the actual shape at the component mounting position are drawn, are projected on the TV screen by superimposition, and are aligned with the actual image. Since coordinate data is created, it is possible to create coordinate data even when there is no insertion hole in the same way as when there is an insertion hole. Further, even in a printed wiring board with an insertion hole, poor accuracy due to a difference in hole diameter does not occur.
Furthermore, it can also accommodate deformed holes. Furthermore, coordinate correction on the mounting machine becomes unnecessary.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of the present invention, and FIG.
The figure shows an example of alignment marks. 1...XY table, 2...Control unit, 3...Storage device, 4...TV camera, 5...TV, 6
...Personal computer, P...Printed wiring board.

Claims (1)

[Claims] 1 A television camera that photographs the component mounting surface of the printed wiring board, a television that displays the image taken by this television camera, and a drawing that draws alignment marks corresponding to the actual shape of the component mounting position on the printed wiring board. means, a superimposing means for superimposing the alignment mark drawn by the drawing means on the television screen, and a printed wiring board for matching the alignment mark and the corresponding real image on the television screen. An automatic electronic component mounting machine comprising a moving means for moving a television camera relative to the board in the X-axis and Y-axis directions, and a storage means for reading the position moved by the moving means when matching is performed as coordinate data of the component mounting position. coordinate data creation device.