JP3333112B2 - Light beam heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light beam heating apparatus used as a heat source for performing non-contact local heating using light energy of a light beam from a light emitting lamp.

[0002]

2. Description of the Related Art In recent years, as a non-contact local heating device for non-contact local heating, light from a light-emitting lamp, which is a light source, is condensed into a light beam, and the light energy is used by utilizing the light energy. Is widely used as a heat source for heating at the time of soldering, removing a film of a small-diameter polyurethane wire, or heating and melting a resin.

An outline of such a conventional light beam heating device will be described below. 5, reference numeral 1 denotes a light-emitting lamp such as a xenon lamp, 1a denotes a cathode of the light-emitting lamp 1, 1b denotes an anode of the light-emitting lamp 1, 2 denotes a power supply circuit for supplying power to the light-emitting lamp 1, and 3 denotes a light-emitting lamp 1 indicated by an arrow Y1. , A reference numeral 4 denotes an elliptical reflecting mirror for condensing light from the light-emitting lamp 1, and 5 denotes an optical fiber.
Hundreds of fiber strands are bundled to form a bundle. The light receiving end 5a of the optical fiber 5 has an elliptical reflecting mirror 4 at the center.
Is fixed by a mounting bracket (not shown) so as to come to the position of the second focal point. Reference numeral 6 denotes a lens unit in which an optical lens system for condensing light emitted from the emission end 5b of the optical fiber 5 is incorporated. Reference numeral 7 denotes an optical fiber for detecting light intensity, which is arranged at the center of the light receiving end 5a of the optical fiber 5. Reference numeral 8 denotes a photoelectric converter for converting the light output of the optical fiber 7 for detecting light intensity into an electric quantity, and 9 stores and calculates an output value of the photoelectric converter 8, and determines a movement amount of the light emitting lamp 1 based on the calculation result. This is control means capable of giving a command to the moving mechanism 3 via the motor driver 10.

[0004] The operation of the light beam heating apparatus configured as described above will be described below. Normally, the bright spot of the light-emitting lamp 1 is near the tip of the cathode 1a, and the bright spot is located at the first focal point of the elliptical reflecting mirror 4.
Is adjusted by the moving mechanism 3. Light emitted from the luminescent spot is reflected by the elliptical reflecting mirror 4 and is collected on the light receiving end 5a of the optical fiber 5 arranged at the second focal point of the elliptical reflecting mirror 4. The condensed light is transmitted by the optical fiber 5 and emitted from the emission end 5b, and then condensed again by the lens unit 6, and the object to be heated is heated by the condensed light.

Incidentally, an arc discharge lamp such as a xenon lamp is usually used as the light-emitting lamp 1, and this arc discharge lamp has an electrode 1 with a lapse of use time.
a and 1b are consumed. The bright spot of the light-emitting lamp 1 is the cathode 1
a, and a positional shift occurs between the luminescent spot of the light-emitting lamp 1 and the first focal point of the elliptical reflecting mirror 4 due to the consumption of the tip of the cathode 1a. In order to prevent the heating output from lowering due to the positional deviation, it is necessary to drive the moving mechanism 3 at regular intervals of use of the light emitting lamp 1 and to adjust the luminescent spot of the light emitting lamp 1 to the second focal point of the elliptical reflecting mirror 4. Currently, devices that automatically perform this operation have been put to practical use.

[0006] In the example shown in FIG.
b is arranged on the upper side and the cathode 1a is arranged on the lower side,
In this case, since the luminescent spot shifts downward due to the consumption of the cathode 1a, it is necessary to gradually move the light emitting lamp 1 upward by the moving mechanism 3 as the usage time of the light emitting lamp 1 elapses.

For this purpose, the light output of the light intensity detecting optical fiber 7 arranged at the center of the light receiving end 5 a of the optical fiber 5 is photoelectrically converted by the photoelectric converter 8, and this output is transmitted to the control means 9.
Thus, the moving mechanism 3 is operated via the motor driver 10 so that the output is automatically measured at a fixed time interval and the output becomes the maximum value. FIG. 6 shows an example of a program for automatic focusing incorporated in the control means 9 for automatically performing this operation.

In this program, first, the light intensity from the light intensity detecting optical fiber 7 is detected (step 61).
Next, the light emitting lamp 1 is moved by a unit amount, and the light intensity is measured in the same manner (step 62). If the light intensity is high, the light emitting lamp 1 is continuously moved in the same direction (step 63). By repeating the movement (step 64), the position of the light-emitting lamp 1 is finally moved so that the light intensity becomes the highest, so that the bright spot of the light-emitting lamp 1 becomes the first focal point of the elliptical reflecting mirror 4. I'm matching.

[0009]

However, in the above-described conventional light beam heating apparatus, the position of the light emitting lamp 1 is gradually moved upward as the operating time of the light emitting lamp 1 elapses. When the lamp reaches the end of its life, the position of the light emitting lamp 1 has moved considerably upward from the initial position. When the life of the light-emitting lamp 1 expires, the light-emitting lamp 1 is replaced with a new light-emitting lamp. However, the moving mechanism 3 of the light-emitting lamp 1 has moved considerably upward as described above. In this case, the luminescent spot of the light-emitting lamp 1 at that time deviates from the first focal point of the elliptical reflecting mirror 4, and there is a problem that a predetermined light output for heating cannot be obtained.

In the program shown in FIG. 6, the light intensity is detected and the light emitting lamp 1 is moved in a direction in which the light intensity increases, so that the position of the light emitting lamp 1 can be properly returned by such control. However, this is based on the premise that the output value of the optical fiber 7 for detecting light intensity is at a detectable level, and when the light emitting lamp 1 is replaced, the light emitting lamp 1 is detected because the positional deviation is very large. In many cases, the output is too low to search for, and the movement control by the control means 9 for the alignment becomes unstable in operation.

Therefore, the light-emitting lamp 1 cannot always be moved to an appropriate position, and there has been a problem that a stable heating operation cannot always be obtained.
The present invention solves the above-mentioned conventional problems. Even when the light-emitting lamp, which is the light-emitting means, is replaced, the movement of the light-emitting lamp is stably and reliably controlled, and the light-emitting lamp is always moved to an appropriate position. And a light beam heating device that can always obtain a stable heating operation.

[0012]

In order to solve the above-mentioned problems, a light beam heating apparatus according to the present invention, when replacing a light emitting means, operates the operating means by operating the new light emitting means.
Caused by electrode wear between the
It is characterized in that stable and reliable movement control of the light emitting means can be performed by moving the generated light emitting means by the positional deviation amount and returning the light emitting means to the optimum position.

Further, at the time of replacement of the light emitting means, by detecting by the exchange detecting means that replace the light emitting unit, and when the light emitting means, which reached a new case and life
Position of the light emitting means caused by electrode wear
It is characterized in that stable and reliable movement control of the light-emitting means can be performed by moving by an amount and returning to the optimum position.

Further, when replacing the light emitting means, by comparing the output value and the reference value of the light detecting means, by determining from the result as light emission means is replaced, the light emitting means, if new and life The electrode is turned off when
By moving the light emitting means by the amount of positional deviation caused by wear and returning the light emitting means to the optimum position, stable and reliable movement control of the light emitting means is enabled.

As described above, even when the light emitting means is replaced, the movement control for the light emitting means is stably and reliably performed.
The light emitting means can always be moved to an appropriate position, and a stable heating operation can always be obtained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A light beam heating apparatus according to a first aspect of the present invention includes a light emitting means for emitting light by arc discharge between opposed electrodes, and a light condensing means for condensing light emitted from the light emitting means. Moving means for moving the light emitting means, and the moving means to move the light emitting means in accordance with a consumption amount of an electrode of the light emitting means corresponding to a change in intensity of light collected by the light collecting means. A light beam heating apparatus having a control means for controlling the movement of the light emitting means, wherein the displacement amount of the light emitting means caused by exhaustion of the electrode between the case where the light emitting means is new and the case where the life thereof is reached is instructed to the moving means. A configuration is provided that includes a movement amount commanding means and an operation means for operating the movement amount commanding means when the light emitting means is replaced.

According to this configuration, when the light emitting means is replaced, the light emitting means is changed to a new one by operating the operating means.
Caused by electrode wear between the
By moving the generated light emitting means by the amount of positional deviation and returning it to the optimum position, stable and reliable movement control of the light emitting means is enabled.

A light beam heating device according to a second aspect of the present invention includes a light emitting unit that emits light by an arc discharge between opposing electrodes;
A light collecting means for collecting light emitted from the light emitting means, a moving means for moving the light emitting means, and a consumption amount of an electrode of the light emitting means corresponding to a change in intensity of the light collected by the light collecting means. A light beam heating device comprising a control means for controlling the moving means so as to move the light emitting means, wherein the light emitting means is new and has reached the end of its life.
Position of the light emitting means caused by electrode wear
A moving amount command means for instructing the amount to the moving means, the exchange detecting means for detecting that replacing the light emitting means, the detection signal from the exchange detecting means, actuating said moving amount command means after a predetermined time And operating means for the operation.

[0019] According to this configuration, at the time of replacement of the light emitting means, by detecting by the exchange detecting means that replacing the light emitting means, the light emitting means, if new and life
Emission caused by electrode depletion before and after
By moving the means by the amount of positional deviation and returning it to the optimum position, stable and reliable movement control of the light emitting means is enabled.

A light beam heating device according to a third aspect of the present invention is a light beam heating device that emits light by arc discharge between opposing electrodes;
A light collecting means for collecting light emitted from the light emitting means, a moving means for moving the light emitting means, and a consumption amount of an electrode of the light emitting means corresponding to a change in intensity of the light collected by the light collecting means. A light beam heating device comprising a control means for controlling the moving means so as to move the light emitting means, a light detecting means for detecting the intensity of the condensed light, and an output from the light detecting means. A photoelectric conversion unit for performing photoelectric conversion, wherein the photoelectric conversion unit is configured to change its output value in accordance with a consumption amount of an electrode of the light emitting unit corresponding to a change in intensity of the condensed light; Means, when the output value from the photoelectric conversion means is lower than a preset reference value, when the light emitting means is new and when its life has expired
Position of the light emitting means caused by electrode wear between
The moving means is controlled so as to move by a fixed amount set in accordance with the moving amount.

According to this configuration, when the light emitting means is replaced, the output value of the light detecting means is compared with the reference value, and it is determined from the result that the light emitting means has been replaced.
Change the light emitting means between when it is new and when it reaches the end of its life.
By moving the light emitting device by the amount of positional deviation generated by the exhaustion of the electrode at the time and returning it to the optimum position, stable and reliable movement control of the light emitting device can be performed.

Hereinafter, a light beam heating apparatus according to an embodiment of the present invention will be specifically described with reference to the drawings. (Embodiment 1) FIG. 1 shows the configuration of a light beam heating apparatus according to Embodiment 1 of the present invention.
a, 1b, 2, 3, 4, 5, 5a, 5b, 6, 7, 8,
The components indicated by 9 and 10 are the same as those of the conventional light beam heating device shown in FIG.

In FIG. 1, reference numeral 11 denotes a motor driver 10
And a moving amount commanding means for commanding a moving amount of the light emitting lamp 1 as a light emitting means to a moving means constituted by the moving mechanism 3;
Reference numeral 12 denotes a movement amount command means 1 when the light emitting lamp 1 is replaced.
1 is an operation means for operating 1.

As described in the conventional example shown in FIG. 5, the cathode 1a of the light-emitting lamp 1 is consumed as the operating time elapses, and the bright spot of the light-emitting lamp 1 is reflected by the elliptical reflecting mirror 4 serving as a condensing means.
In order to deviate from the position of the first focal point, the optical output of the optical fiber 7 for detecting the light intensity, which is the optical detecting means disposed at the light receiving end 5a of the optical fiber 5, is detected so that the output becomes the maximum value. The focusing program shown in FIG. 6 is executed periodically to move the light emitting lamp 1 to an appropriate position. Therefore, when the light-emitting lamp 1 reaches the end of its life, the bright spot has moved considerably upward, and when the light-emitting lamp 1 is replaced with a new one in this position, the light-emitting lamp 1 is moved from the first focal point of the elliptical reflecting mirror 4. There is a case where a predetermined output cannot be obtained due to the displacement, and the light-emitting lamp 1 cannot be positioned at the first focus.

The amount of movement of the luminescent spot between the case where the light emitting lamp 1 is new and the case where the life thereof has reached is almost equal to the amount of consumption of the cathode 1a. It was found that the value was within a certain range regardless of the variation of 1.

In the first embodiment, the displacement amount of the light-emitting lamp 1 caused by the consumption of the cathode 1a between the case where the light-emitting lamp 1 is new and the case where the life thereof is reached is set in the movement amount command means 11. When the light emitting lamp 1 is replaced, the operator operates the operating means 12 to operate the moving amount command means 11 and the moving means, and the replaced light emitting lamp 1 is automatically turned on. It is moved to the first focal position of the elliptical reflecting mirror 4, which is the new position. (Embodiment 2) FIG. 2 shows the configuration of a light beam heating apparatus according to Embodiment 2 of the present invention.
a, 1b, 2, 3, 4, 5, 5a, 5b, 6, 7, 8,
The components indicated by 9 and 10 are the same as those of the conventional light beam heating device shown in FIG.

In FIG. 2, reference numeral 11 denotes the same movement amount command means as that described in the first embodiment, and reference numeral 14 denotes the light-emitting lamp 1.
Detection means for detecting the replacement of the exchange means 13;
4 after a predetermined period of time according to the detection signal from
1 is an actuation means for actuating 1. The replacement detection means 14
When the light-emitting lamp 1 is replaced, the fact that the light-emitting lamp 1 is removed and reinstalled is detected using a proximity sensor or the like.

In the second embodiment, the replacement of the light emitting lamp 1 is automatically detected by the replacement detecting means 14, and the operating means 1
3, the moving amount command means 11 is operated after a predetermined time, and the replaced light emitting lamp 1 is automatically replaced with the elliptical reflecting mirror 4 at the position where the light emitting lamp 1 is new as in the first embodiment. It is moved to the first focal position. (Embodiment 3) FIG. 3 shows the configuration of a light beam heating apparatus according to Embodiment 3 of the present invention.
a, 1b, 2, 3, 4, 5, 5a, 5b, 6, 7, 8,
The device denoted by reference numeral 10 is the same as the conventional light beam heating device shown in FIG. 5, and a description thereof will be omitted.

In FIG. 3, reference numeral 9a denotes a moving mechanism for comparing the output value of the photoelectric converter 8 with a preset reference value, and when the output value of the photoelectric converter 8 as the photoelectric conversion means is lower than the reference value. The control means controls the moving means including the motor driver 3 and the motor driver 10 to move by a predetermined amount. An example of a built-in program showing the movement control operation of the control means 9a is shown in FIG.
Shown in

In the third embodiment, as shown in FIG.
When the light-emitting lamp 1 is replaced with a new one, a decrease in output caused by a significant displacement between the bright spot of the light-emitting lamp 1 and the first focal point of the elliptical reflecting mirror 4 is detected by comparing with a preset reference value. (Steps 41 and 42). That is, if the light output is equal to or less than the reference value, it is determined that the light emitting lamp 1 has been replaced with a new one, and the replaced light emitting lamp 1 is automatically moved to the first focal position when the light emitting lamp 1 is new. (Step 43). Then, FIG.
By executing the automatic focusing program described in (1) and (2), finer movement control is performed (step 44).

By the operation of each of the above embodiments, even when the light emitting lamp 1 is replaced, the movement control for the light emitting lamp 1 is stably and surely performed, and the light emitting lamp 1 is always moved to an appropriate position. And a stable heating operation can always be obtained.

[0032]

As described above, according to the first aspect of the present invention, when the light emitting means is replaced, the light emitting means is operated by operating the operating means to determine whether the light emitting means is new or has reached its end of life.
Position of the light emitting means caused by electrode wear
By moving by an amount and returning to the optimum position, stable and reliable movement control of the light emitting means can be performed.

According to the second aspect of the present invention, when the light emitting means is replaced, the replacement detecting means detects that the light emitting means has been replaced.
Electrode wear between new and end of life
By moving the light emitting means by the amount of the positional deviation generated and returning the light emitting means to the optimum position, stable and reliable movement control can be performed on the light emitting means.

According to the third aspect of the present invention, when the light emitting means is replaced, the output value of the light detecting means is compared with the reference value, and it is determined from the result that the light emitting means has been replaced. The light emitting means in a new case and life
Light-emitting hands caused by electrode wear between
By moving the step by an amount corresponding to the position shift of the step and returning the position to the optimum position, stable and reliable movement control of the light emitting means can be performed.

For the above reasons, even when the light emitting means is replaced, the movement control for the light emitting means is performed stably and reliably.
The light emitting means can always be moved to an appropriate position, and a stable heating operation can always be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a light beam heating device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a light beam heating device according to a second embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a light beam heating device according to a third embodiment of the present invention.

FIG. 4 is a flowchart showing an operation example in a control unit according to the third embodiment;

FIG. 5 is a configuration block diagram showing an operation concept of a conventional light beam heating device.

FIG. 6 is a flowchart showing an operation example in a control unit in the conventional example.

[Explanation of symbols]

 Reference Signs List 1 light emitting lamp 1a cathode 1b anode 2 power supply circuit 3 moving mechanism 4 elliptical reflecting mirror 5 optical fiber 5a light receiving end 5b emission end 6 lens unit 7 light intensity detecting optical fiber 8 photoelectric converter 9, 9a control means 10 motor driver 11 movement Quantity commanding means 12 Operating means 13 Operating means 14 Exchange detecting means

────────────────────────────────────────────────── ─── Continuation of the front page Examiner Akinori Yokomizo (56) References JP-A-5-94862 (JP, A) JP-A-3-297589 (JP, A) JP-A-61-211978 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) B23K 1/005 H05B 3/00 H05B 7/00 H05B 7/22

Claims (3)

(57) [Claims] A light emitting means for emitting light by arc discharge between opposed electrodes; a light collecting means for collecting light emitted from the light emitting means; a moving means for moving the light emitting means; A light beam heating device comprising: a control unit that controls the moving unit so as to move the light emitting unit in accordance with a consumption amount of an electrode of the light emitting unit corresponding to a change in intensity of the condensed light. Moving amount command means for instructing the moving means of a displacement amount of the light emitting means caused by exhaustion of the electrode between when the light source is new and when the life has expired, and the moving amount command means when the light emitting means is replaced. A light beam heating device comprising: operating means for operating the light beam. 2. A light emitting means for emitting light by arc discharge between opposed electrodes, a light collecting means for collecting light emitted from the light emitting means, a moving means for moving the light emitting means, and the light collecting means. A light beam heating device comprising: a control unit that controls the moving unit so as to move the light emitting unit in accordance with a consumption amount of an electrode of the light emitting unit corresponding to a change in intensity of the condensed light. Is new and longevity
The source caused by exhaustion of the electrode between the time when it reaches the end of life
A movement amount command means for commanding the displacement means of the light means to the movement means, an exchange detection means for detecting that the light emitting means has been replaced, and a detection signal from the exchange detection means,
Operating means for operating the movement amount command means after a predetermined time. 3. A light-emitting device that emits light by arc discharge between opposed electrodes, a light-collecting device that collects light emitted from the light-emitting device, a moving device that moves the light-emitting device, and the light-collecting device. A light beam heating device comprising: a control unit that controls the moving unit so as to move the light emitting unit in accordance with an amount of consumption of an electrode of the light emitting unit corresponding to a change in intensity of the condensed light. Light detection means for detecting the intensity of light, and photoelectric conversion means for photoelectrically converting the output from the light detection means, the photoelectric conversion means, the output value corresponding to the intensity change of the condensed light It is configured to change according to the amount of consumption of the electrode of the light emitting means, and the control means, when the output value from the photoelectric conversion means is lower than a preset reference value, when the light emitting means is new.
It is caused by exhaustion of the electrode between the end of the service life
A light beam heating device configured to control the moving means so as to move by a fixed amount set in accordance with the positional shift amount of the light emitting means .