JPH0592220A - Method for position fine parts - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a positioning method for minute parts, which can be adjusted with high accuracy and can be adjusted in a short time, in a positioning method for minute parts to be attached to a main body via an arm. is there. [Structure] When a laser is applied to the arm 4 to which a minute component is attached, thermal stress is generated, so that the laser-irradiated portion of the arm 4 is plastically deformed. This plastic deformation amount can be controlled ultra-precision by optimally selecting the laser conditions. That is, the minute component 3 attached to the arm 4 can move in the vertical direction within the minute range by the plastic deformation of the arm 4.
When the final positioning of the minute component is performed in this manner, highly accurate positioning can be performed in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly accurate positioning method for minute parts such as sensors attached to electric products such as motors.

[0002]

2. Description of the Related Art In recent years, in various fields, all products are aimed at downsizing and thinning. Therefore, parts attached to the products also need to be downsized and thinning. Therefore, the micro parts attached to the product are
Higher precision positioning is required.

Next, an example of a conventional positioning method is shown in FIG.
Will be described with reference to. First, the main body 1 is fixed on the base 2, while the micro component 3 is fixed to the arm 4 with an adhesive or the like. Further, the arm 4 is supported by a holder 5 so that the positioning can be adjusted ((a) in the figure).

Next, the arm 4 to which the minute component 3 is attached is moved by the holder 5 and temporarily fixed to the side surface of the main body 1 fixed on the base 2 by using the screw 6 (FIG. 2 (b)). ..

Next, the arm 4 to which the minute component 3 is attached is moved by the holder 5 and temporarily fixed to the side surface of the main body 1 fixed on the base 2 by using the screw 6 (FIG. 2 (c)). ..

Then, the T mounted on the left side of the main body 1
The height from the bottom surface of the main body 1 to the top surface of the minute component 3 on the holder 5 is measured using the V camera 7, and the measured value is defined as Lm. In this example, this height is a dimension that requires precise positioning ((d) in the figure).

Next, a screw 6 for temporarily fixing the holder 5
Loosen the target value Lm of this positioning height and the measured value L
The holder 5 is moved in the vertical direction by a difference ΔL (= Lm−Ls) from s, and the screw 6 is firmly tightened to permanently fix the holder 5 ((d) in the figure).

Finally, the positioning height is measured once again, and the difference ΔL '(= between the target value Lm and the current measured value Ls' is obtained.
If Lm-Ls') is within a certain defined range, the positioning is completed.

However, if this difference .DELTA.L 'exceeds the range, the screws 6 that are permanently fixed are again loosened and readjusted, and this positioning adjustment is repeated many times until it falls within this range. repeat.

[0010]

However, in the above-described positioning method, when the screws are fully fixed after the final positioning adjustment, the holder slightly moves due to the force at that time, so that highly accurate positioning is possible. , Had the problem of not being able to do it completely.

Further, since it is necessary to repeat the positioning adjustment, there is a problem that the adjustment takes a long time.

Therefore, the present invention solves the above-mentioned problems and provides a positioning method for minute parts, which enables highly accurate positioning and can be adjusted in a short time.

[0013]

In order to achieve the above object, the present invention provides a method for performing final positioning of a micro component by irradiating an arm on which the micro component is mounted with a laser to plastically deform the arm. Is.

[0014]

According to the method of the present invention, when the arm to which the minute parts are attached is irradiated with the laser, the laser-irradiated portion of the arm is plastically deformed. This plastic deformation can be controlled by the laser output or the like. By utilizing this principle, the arm can be plastically deformed arbitrarily, and the minute parts mounted on the arm can be positioned with high accuracy.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

1 and 2 are diagrams showing an embodiment of the present invention. In the present invention, as in the conventional example, the main body 1 is fixed on the base 2, while the minute component 3 is fixed to the arm 4.
It is fixed to the adhesive. Furthermore, the arm 4 is supported by a holder 5 so that the positioning can be adjusted (FIG. 1A).

Next, the arm 4 to which the minute component 3 is attached is moved by the holder 5 and temporarily fixed to the side surface of the main body 1 fixed on the base 2 using the screw 6 (see FIG. 1).
(B)).

The T mounted on the left side of the main body 1
Using the V camera 7, the height from the bottom surface of the main body 1 to the top surface of the minute component 3 on the holder 5 is measured, and the measured value is defined as Lm. In this embodiment, this height is a dimension that requires precise positioning (FIG. 1 (c)).

Next, a screw 6 for temporarily fixing the holder 5
Loosen the target value Lm of this positioning height and the measured value L
The holder 5 is moved up and down by a difference ΔL (= Lm−Ls) from s, and the screw 6 is firmly tightened to permanently fix the holder 5 (FIG. 2A).

Finally, the positioning height is measured once more, and the difference ΔL '(= L' between the target value Lm and the measured value Ls' at this time is calculated.
If Lm-Ls') is within a predetermined range, the positioning is completed.

Up to this point, the positioning method is completely the same as that of the conventional example, but the adjusting method after this is a positioning method completely different from that of the conventional example.

That is, in the conventional example, the above error ΔL '
However, if it exceeds a certain range, loosen the screw 6 that is permanently fixed again and readjust it until it falls within this range.
This positioning adjustment was repeated many times.

However, in the present embodiment, as shown in FIG. 2B, laser is emitted from above the arm 4 to which the minute component 3 is attached while the screw 6 is tightly fastened.

Then, thermal energy is generated inside the arm 4 due to the thermal energy at the time of laser irradiation, and the arm 4 is plastically deformed. This amount of plastic deformation can be controlled ultraprecision by optimally selecting the laser conditions. That is, the minute component 3 attached to the arm 4 can move in the vertical direction within the minute range by the plastic deformation of the arm 4. In this way
When the final positioning of the minute component 3 is performed, highly accurate positioning can be performed in a short time (FIG. 2 (c)).

The amount of plastic deformation described above is, for example, laser output, irradiation time, irradiation position, irradiation frequency, spot diameter,
Ultra-precision control is possible by the spot shape and the like. In addition, the plastic deformation of the target work, in this example, the material, shape (plate width, plate thickness), surface condition, etc. of the arm 4 changes, so caution is required.

[0026]

As described above, when the arms to which the minute parts are attached are irradiated with a laser to plastically deform the arms, the final positioning of the minute parts is performed.
Highly accurate positioning can be performed in a short time.

[Brief description of drawings]

FIG. 1 is a diagram showing a method of positioning a minute component according to an embodiment of the present invention.

FIG. 2 is a diagram showing a method of positioning a minute component according to an embodiment of the present invention.

FIG. 3 is a diagram showing a conventional method for positioning a minute component.

[Explanation of symbols]

 1 Main body 2 Micro component 4 Arm

Claims (1)

[Claims] 1. A method for positioning a micro component, which is mounted on a main body via an arm, wherein the micro component is positioned by irradiating the arm with a laser to plastically deform the arm. Method.