JPH04301710A - Part mounting device - Google Patents

Abstract

PURPOSE:To make a rapid and automatic setting of a photographed image of a part to be mounted. CONSTITUTION:A TAB part 1 transferred on an intermediate stage 4 is photographed by means of a CCD camera 8. In order to optimize the photographing magnification as an initial setting, the size of the TAB part 1 is calculated on the basis of image data obtained from the initial images photographed at the specified magnification by means of a vision controller 9, and the control signal for adjustment is output to the CCD camera 8 by selecting the optimum set magnification among the set magnifications of which resolution to be set stepwise and the calibration are known. This constitution allows rapid setting to an appropriate magnification without any fractions to the resolution or the like.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounting apparatus that visually recognizes components to be mounted using an imaging means and mounts them at a predetermined location.

0003

[Prior Art] For example, TAB (Tape Auto
When mounting TAB parts on a carrier tape, the TAB parts are supplied mounted on a carrier tape, and when mounted on the target device, the TAB parts are cut from the carrier tape and then Move it to the specified position and connect it. What is important in this case is the positioning of the TAB parts. In other words, in order to mount the TAB component at an appropriate position, it is necessary to adjust the position with considerable precision. Therefore, conventionally, T
A camera is installed to recognize the position of AB parts, and control is performed to correct the position based on the enlarged video signal.

0004

[Problem to be solved by the invention] By the way, when using a camera,
When photographing AB parts, the size differs depending on the type of TAB part, so before starting the mounting operation, adjust the camera's photographing magnification so that the TAB part is of an appropriate size within the camera's field of view. need to be adjusted.

[0005] In other words, in component mounting, image processing is performed in accordance with the photographed image pattern of the TAB component, and correction control is performed to correct the position. For example, the resolution will be lowered, and if it is too large, it will become impossible to recognize the entire position of the TAB component.

[0006] Furthermore, when taking pictures using a CCD camera, for example, the resolution is limited by the number of pixels of the CCD camera, and dimensions smaller than one pixel cannot be recognized in the taken image. In other words, resolution is determined by how many microns one pixel corresponds to.

[0007] Image processing of the photographed image data is used to perform calibration, that is, the number of microns that one pixel corresponds to, even when recognizing, for example, the chip size of a TAB component or the lead line width of a TAB component. The standard is the conversion ratio.

[0008] Therefore, depending on the magnification of the camera, setting values for resolution, calibration, etc. become complicated, which can be troublesome, so it is desirable to automatically set the appropriate magnification while changing the magnification of the camera. This would require too much processing speed, making it difficult in reality.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an automatic component mounting apparatus that can quickly set and control an image of a component to be mounted using an imaging means within a predetermined area. be.

[Configuration of the invention]

[0011]

[Means for Solving the Problems] The present invention is directed to a component mounting apparatus that visually recognizes a component to be mounted using an imaging means and mounts it on a predetermined part. The present invention is characterized in that a control means is provided for selecting and controlling a preset magnification so that the image area of the component falls within a predetermined area.

0012

[Operation] According to the component mounting apparatus of the present invention, the control means performs calculations on the supplied mounting components based on the initial image data photographed by the imaging means, and photographs the mounted components using the imaging means. The magnification of the imaging means is changed and controlled so that the area falls within a predetermined area. Therefore, compared to the conventional method in which the setting magnification of the imaging means is changed sequentially, the setting of the magnification is done quickly, and the resolution and calibration are already set in advance when the settings are adjusted. Therefore, initial settings can be completed quickly and easily.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a TAB component automatic mounting apparatus will be described below with reference to the drawings.

FIG. 2 schematically shows the main parts of the TAB automatic mounting device, in which the TAB component 1 is supplied while being mounted on a carrier tape 2, and is supplied from two supply mechanisms (not shown). Carrier tapes 2, 2 wound around tape reels are fed out.

The punching mechanism 3 is composed of a pair of molds 3a and 3b arranged above and below, and punches the TAB component 1 mounted on the carrier tape 2 into a predetermined shape. The lower mold 3b is provided so as to be movable together with the lower mold 3b of the other punching mechanism 3, and is moved with the punched TAB part 1 placed thereon. When one punching mechanism 3 is in operation, the TAB part 1 punched by the other punching mechanism 3 is moved to a supply position A in the middle of both punching mechanisms 3. .

The intermediate stage 4 is provided at a position corresponding to the above-mentioned supply position A, and the TAB parts 1 supplied to the supply position A are moved to the intermediate stage 4 by the transfer head 5. In this case, the transfer head 5 is configured to transport the TAB component 1 to the intermediate stage 4 by suctioning it from above.

TAB part 1 moved to intermediate stage 4
is then moved to the substrate 7 set on the substrate mounting stage by being sucked from above by the mounting head 6, and at this time the mounting head 6 moves in conjunction with the transfer head 5. It looks like this.

A CCD camera 8 is provided above the intermediate stage 4 as an imaging means for recognizing the TAB component 1 placed by the transfer head 5. This CCD
The camera 8 is for visually recognizing the TAB part 1,
A microcomputer or the like calculates deviations in, for example, the X direction, Y direction, and θ direction based on the image data, and performs position correction control during mounting.

Now, the above-mentioned CCD camera 8 is connected to a vision controller 9 which is a control means for adjusting the magnification as shown in FIG.
In addition to receiving an image signal from the CCD camera 8, it also provides an adjustment signal for setting the magnification to the CCD camera 8.

Next, the operation of this embodiment will be explained with reference to FIGS. 3 to 5.

[0021] First, the vision controller 9
When automatically mounting the component 1, initial settings are performed by automatically adjusting so that the image of the TAB component 1 falls within a predetermined range within the photographed screen by the CCD camera 8, as follows.

That is, when the TAB part 1 is transferred to the intermediate stage 4, the image taken by the CCD camera 8 is, for example, as shown in FIG.
A case where the area occupied by component 1 is small will be described.

First, when image data taken by the CCD camera 8 at a predetermined magnification is given to the vision controller 9, the vision controller 9 calculates the area occupied by the TAB component 1 based on the image data. At this time, since the imaging magnification is determined, the actual size of the TAB component 1 can be calculated.

Then, according to the calculated size of the TAB component 1, a magnification for setting the video area of the TAB component 1 within a predetermined range can be calculated. However, the magnifications that can be set at this time are determined in advance to be stepwise values as shown in FIG. Therefore, the vision controller 9 determines the closest magnification corresponding to the above-described calculated size of the TAB component 1.

[0025] In the above case, the magnification values determined in stages are determined based on the following grounds.

That is, the CCD camera 8 has, for example, 512×
Assuming that 512 dots or pixels are formed,
The resolution that can be recognized from an image obtained when a certain magnification is set is determined by the number of pixels. Since an image is constructed depending on the presence or absence of a single pixel signal,
Resolution is the distance or area equivalent to one pixel. Anything smaller than this cannot be recognized.

On the other hand, based on the photographed image data, T
When controlling the position of the AB component 1, it is necessary to calibrate the distance corresponding to one pixel. However, since the minimum dimensions of the TAB parts 1 to be handled are generally formed in units of about 0.1 mm, in many cases, when the imaging magnification by the CCD camera 8 is set to an arbitrary magnification, The dimension of one pixel becomes a dimension with a fraction, and an accumulated error occurs in the result of the dimension calculated by multiplying the number of pixels obtained from the image data.

[0028] Taking these circumstances into consideration, calibration values and imaging magnifications with a non-fractional resolution as shown in FIG. 5 are set in advance. Therefore, there is no need to newly set resolution or perform calibration at the selected imaging magnification.

Furthermore, unlike the above case, as shown in FIG. 4, the TAB part 1 is
If the occupied area exceeds the predetermined range, perform calculations in the same manner as described above, select the setting magnification shown in FIG. change to a new state.

[0030] Once the image taken by the CCD camera 8 has been set to the optimum magnification as described above, the automatic mounting operation of the TAB component 1 is then carried out in the same manner as in the prior art.

According to this embodiment, the imaging area by the CCD camera 8 is determined by the vision controller 9 by selecting a preset imaging magnification, so that the imaging area can be quickly set and In that case, resolution and calibration can be easily set.

[0032] In the above embodiment, TAB part 1
Although a case has been described in which automatic mounting is carried out, the present invention is not limited to TAB parts, but can also be applied to mounting electronic parts, IC chips, etc., for example.

[0033]

According to the component mounting apparatus of the present invention, when the proportion of the screen of the component photographed by the imaging means is not within a predetermined range, the preset magnification is set in consideration of resolution and calibration values. Since the adjustment is made by the control means, the screen settings can be easily and quickly made, which is an excellent effect.

[Brief explanation of drawings]

[Fig. 1] A schematic configuration diagram of main parts showing an embodiment of the present invention.

[
Figure 2: Schematic configuration diagram of TAB component automatic mounting equipment

[Figure 3]
Action explanatory diagram showing TAB parts photographed on the initial screen

[Figure 4] Diagram equivalent to Figure 3 in different cases

[Figure 5] Diagram showing the relationship between the size of photographed TAB parts and the corresponding photographic magnification

[Explanation of symbols]

1 is TAB parts (mounting parts), 2 is carrier tape,
3 is a punching mechanism, 4 is an intermediate stage, 5 is a transfer head,
6 is a mounting head, 7 is a substrate, 8 is a CCD camera (imaging means), and 9 is a vision controller (control means).

Claims (1)

[Claims] 1. A component for mounting is visually recognized by an imaging means and mounted on a predetermined part, wherein a set magnification is set so that an image area of the component within a photographing area by the imaging means falls within a predetermined area. A component mounting apparatus characterized by being provided with a control means for selecting and controlling.