JPH04300065A - Luminous flux quantity variable type welding device - Google Patents

Abstract

PURPOSE:To adjust the luminous flux quantity from a halogen lamp in accordance with a size of a soldering part, so that only the soldering part is irradiated locally with a luminous flux. CONSTITUTION:A reflecting mirror 9 fixed to the inside of a guide cylinder 1 is constituted by coupling a first mirror 11 having a luminous flux nozzle 20 and a second mirror 12 having a screw 24 so as to be attachable and detachable each other. The screw 24 of a second mirror 12 is engaged to a screw 26 of a movable sleeve 25, and the movable sleeve 25 is inserted into a lamp holder 35 for holding a halogen lamp 37 so as to be attachable and detachable. By engaging the screw 24 of the second mirror 12 and the screw 26 of the movable sleeve 25, the movable sleeve 25 is moved vertically and the halogen lamp 57 is made retractable in the reflecting mirror 9.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a welding device suitable for use as a heat source for thermally welding a soldered part when, for example, soldering a flat package IC to a printed circuit board. The present invention relates to a variable luminous flux type welding device that adjusts the amount of luminous flux from a halogen lamp of the device to the size of the processed portion to perform local heating.

0002

[Prior Art] For example, when soldering a flat package IC to a printed circuit board, it has already been done to blow a high-temperature air flow generated by a heater onto the soldered part to melt the processed part and perform soldering. It is being said. A hot air generator for obtaining such a high-temperature air flow includes, for example, a hollow heater body having a nozzle at one end and an air suction port at the other end, and a fan motor and a heater are installed inside the heater body. This was a configuration in which high-temperature airflow generated by a heater and a fan motor was ejected from a nozzle to the soldering area to perform soldering.

Furthermore, another hot air generator includes a cylindrical quartz bulb having a nozzle at one end and an air blowing port at the other end, and a heating coil is inserted into the quartz bulb through a reinforcing ring. The interior was suspended in the air, and the air blown through the air inlet was converted into heat by a heating coil, and the high-temperature air stream was ejected from the nozzle to the soldering area to perform soldering. In this way, in all soldering processes, high-temperature airflow is used to prevent impurities from entering the soldered part and to improve work efficiency, rather than using contact type soldering such as a soldering iron. This was done using non-contact soldering.

0004

[Problems to be Solved by the Invention] However, in any of the above hot air generators, since the hot airflow from the nozzle is blown onto the soldering area to perform soldering, the hot airflow is locally applied only to the soldering area. It is not possible to concentrate the heat, and the surrounding area of the soldering process ends up being heated as well. In this way, blowing a high-temperature air stream to parts other than the soldered parts to heat them will impair the reliability of the product in the case of precision parts that are easily affected by heat.

[0005] Therefore, if it is possible to locally supply heat to only the soldering part for soldering, the problem of product reliability will be solved, so the size of the soldering part can be adjusted. Accordingly, there has been a strong demand for a device that locally supplies heat and partially heats only the targeted heating area. The purpose of the present invention is to adjust the amount of luminous flux from a halogen lamp according to the size of the soldered part, and to partially heat only the target heating part, especially for precision parts that are easily affected by heat. This is a variable luminous flux welding device with improved reliability. Another object of the present invention is to provide a variable luminous flux welding device in which the operation for adjusting the luminous flux from a halogen lamp is simple, and the adjustment range can be adjusted steplessly according to various soldering parts. It is.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention fixes a reflecting mirror in a guide cylinder, and provides a light beam on the free end side of the reflecting mirror to regulate the amount of luminous flux emitted from a halogen lamp. A vertical movement mechanism for holding a halogen lamp is connected to the reflecting mirror so as to be vertically movable, and the halogen lamp can be moved into and out of the reflecting mirror by vertical movement of the vertical movement mechanism. It is.

[0007] The guide tube is formed in a hollow shape with an air nozzle at one end, and the end opposite to the nozzle is removably attached to a handle containing a fan motor, so that the guide tube and the handle are connected together. Can be removed if necessary. The light flux nozzle formed on the free end side of the first mirror is arranged with a slight gap in the air nozzle of the guide tube, and by passing cooling air through this gap, the entire device is cooled and the soldering process is performed. The area around the processing area is cooled at the same time. By coupling the first adjustment screw formed on the cylindrical portion of the second mirror to the second adjustment screw formed on the movable sleeve,
The range of motion of the movable sleeve is adjusted steplessly. A reflective mirror in which a first mirror and a second mirror are removably coupled to each other can be partially replaced without replacing the entire reflective mirror when one of the mirrors becomes inconvenient.

[0008] The guide tube described above can also be divided into two parts. In this case, the divided parts are fitted so as to be relatively rotatable, the reflective mirror is removably attached to one divided part, the vertical movement mechanism is detachably attached to the other divided part, and the reflective mirror and vertical movement mechanism are removably attached to the other divided part. By screwing together the moving mechanism, the divided guide tubes are connected, and the halogen lamp can be moved in and out of the reflecting mirror by relative rotation of the guide tube.

[0009] The knob protruding from the guide tube is
It is loosely fitted into the guide groove formed in the circumferential direction of the guide cylinder,
and its inner end is fixed to the movable sleeve. To operate the halogen lamp, rotate the knob in the circumferential direction of the guide cylinder and move the vertical movement mechanism up and down in the vertical direction of the guide cylinder, thereby adjusting the amount of projection and retraction with respect to the reflecting mirror.
By adjusting the set position of the filament of the halogen lamp, the amount of luminous flux is adjusted, and selection can be made according to the size of the soldered part. By making the lamp holder that holds the halogen lamp and the movable sleeve that can move up and down removable, the movable sleeve and lamp holder can be removed as necessary when replacing or inspecting the halogen lamp.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIG. 1, a cylindrical guide tube 1 has an air nozzle 2 at one end and a flange 4 for attaching a handle 3 to the other end. A flange 5 is closely attached to the flange 4 and is removably attached with bolts and nuts.
A cylindrical handle 3 is provided at one end, and an air filter 6 for taking in outside air is detachably attached to the other end. The handle 3 may be fixed to, for example, an automatic soldering device or the like, or may be formed in a size that is easy to grip in order to make it easy to hold in the hand.

A fan motor 7 mounted on the flange 5 side of the handle 3 is connected to a power source via a lead wire 8. The outside air taken into the handle 3 by the fan motor 7 via the air filter 6 flows in the direction shown by the arrow in FIG. 1, and enters the guide tube 1 while cooling the handle 3. Furthermore, the outside air passes through the gap 10 around the reflective mirror 9, cools the reflective mirror 9, and is discharged from the air nozzle 2 to the outside of the guide tube 1.
Prevents heat build-up.

The reflecting mirror 9 arranged within the guide cylinder 1 with a gap 10 maintained therebetween is composed of a first mirror 11 and a second mirror 12. The first mirror 11 has a substantially U-shaped cross section, and a step 13 is formed inside one opening edge to form a cylindrical portion 14.
A thread 15 is formed on the inner circumferential surface of. Also, the second
The mirror 12 has a substantially concave cross-sectional shape, and by forming a step 16 on the outside of one opening edge, a cylindrical portion 17 is formed.
8 is formed.

By screwing these screws 15 and 18 together, the first mirror 11 and the second mirror 12
are integrally coupled, and the inner surface thereof is formed as a reflective surface 19 whose cross section extending in the vertical direction is approximately oval. A light flux nozzle 20 is provided on the other end side of the first mirror 11, and the tip of the light flux nozzle 20 is slightly protruded outward from the tip of the air nozzle 2. The light beam from the halogen lamp is reflected and condensed by the reflecting surface 19, and is locally irradiated onto the processing area through the light beam nozzle 20. The first mirror 11 is fixed within the guide tube 1 by a holding arm 21, and the reflecting mirror 9 is held therein.

The other end side of the second mirror 12 has a reflecting surface 1 thereof.
A threaded tube 22 is formed from a position 19a where 9 ends, and a halogen lamp is inserted into a hollow portion 23 of the threaded tube 22 so as to be movable up and down. A screw 24 formed in the threaded tube 22 is screwed to a screw 26 provided in a movable sleeve 25, and as the movable sleeve 25 rotates around the screw tube 22, the vertical movement mechanism 27 is moved up and down. The vertical movement mechanism 27 is composed of a movable sleeve 25 formed into a hollow cylindrical shape and a knob 28 fixed to the circumferential surface of the movable sleeve 25, and a screw 26 of the movable sleeve 25 and a screw 24 of the threaded cylinder 22 are engaged with each other. There is.

The knob 28a of the knob 28 is loosely fitted into a guide groove 29 formed in the guide tube 1 and protrudes outside the guide tube 1. The guide groove 29 is relatively large in the vertical direction of the guide cylinder 1 and is formed along the circumferential direction. When the knob 28 is rotated in the circumferential direction of the guide cylinder 1, the knob 28a of the knob 28 is moved in the circumferential direction within the guide groove 29, and is moved inside the guide groove 29 by the engagement of the screws 24 and 26. is moved up and down, the movable sleeve 25 is moved up and down, and the vertical movement mechanism 27 is moved up and down.

When the knob 28a moves to the lowest position 29a of the guide groove 29, the screw 26 of the movable sleeve 25
The engagement with the screw 24 of the threaded cylinder 22 becomes the deepest, and the vertical movement mechanism 27 is moved to the lowest position as shown in FIG. Ru. In this state, the halogen lamp 37
As shown in FIG. 5(c), the electrode 37a is in a state where it is maximally protruded into the reflection mirror 9, and the light is transmitted through the filament 3.
7a, and the emitted light flux is reflected by the reflecting surface 19.
After being reflected by the beam, the beam is condensed and irradiated from the beam nozzle 20 to the target processing area. In this way, halogen lamp 3
7 is set in advance so that the amount of luminous flux emitted from the luminous flux nozzle 20 becomes maximum when it protrudes to the maximum extent into the reflecting mirror 9.

The knob 28a gradually moves away from the lowest end position 29a of the guide groove 29 and reaches the highest end position 2 of the guide groove 29.
When moved to position 9b, the thread engagement between the thread 26 of the movable sleeve 25 and the thread 24 of the threaded cylinder 22 becomes shallowest. When the vertical movement mechanism 27 is moved, for example, to the position shown by the solid line in FIG. The halogen lamp 37 is moved from the position to the uppermost position, and the halogen lamp 37 is pulled up from within the reflection mirror 9 to the maximum extent.

In this state, the filament 37a of the halogen lamp 37 changes from the state shown in FIG. 5(c) to the state shown in FIG. 5(b).
Further, as shown in FIG. 5(a), the state changes from the state in which the mirror is protruded to the maximum into the reflecting mirror 9 to the state in which it is protruded to the minimum. Therefore, the amount of light beam emitted from the filament 37a, reflected by the reflecting surface 19, and then condensed is gradually adjusted from a large amount to a small amount, and the light beam is irradiated from the light beam nozzle 20 to the target processing part. In this way, the amount of luminous flux is set in advance so that when the halogen lamp 37 is pulled up from inside the reflecting mirror 9 to the maximum, the amount of luminous flux becomes the minimum.

By moving the knob 28a from the lowermost position 29a of the guide groove 29 to the uppermost position 29b, the movable sleeve 27 is vertically moved from the lowermost position to the uppermost position of the threaded tube 22. Therefore, the reflecting mirror 1 of the filament 37a of the halogen lamp 37
The position of appearance and retraction within 9 is adjusted steplessly. Therefore,
The amount of luminous flux from the filament 37a of the halogen lamp 37 is adjusted steplessly, making it possible to locally heat the area with the amount of luminous flux that corresponds to the target processing area.

The lamp holder 35, which is removably inserted into the movable sleeve 25, has a cross-shaped cross section, and a lamp accommodating recess 36 is formed in one of the protrusions. A halogen lamp 37 is mounted in this lamp housing recess 36, and its lead wire 38 protrudes outside the lamp holder 35 and is connected to the power supply side. The insertion convex portion 39 of the lamp holder 35 is removably inserted into the guide sleeve 25, so that the lamp holder 35 can be easily removed from the vertical movement mechanism 27 when replacing or inspecting the halogen lamp 37. There is.

The processing conditions for the target soldering part are as follows: For example, the diameter of the soldering part between the IC board and the printed circuit board is 6 mm, and the total length of the filament 37a of the halogen lamp 37 serving as the heat source is 6 mm. 4 mm, from the non-reflective end 19a of the reflective mirror to the second reflective mirror 1.
A specific example will be described in which the focal length to the aperture end 12a of No. 2 is set to 25 mm. First, in order to make the halogen lamp 37 protrude into the reflection mirror 9 to the maximum extent in order to obtain the maximum amount of luminous flux, the movable sleeve 25 is moved by moving the knob 28 in the circumferential direction within the guide groove 29.
is lowered in the vertical direction while being rotated around the threaded cylinder 22. The knob 28a is at the lowest end position 2 of the guide groove 29.
When the screws 24 and 26 are brought to position 9a, the engagement between the screws 24 and 26 is at its deepest, and the halogen lamp 37
Maximum protrusion within.

When the halogen lamp 37 is fully projected into the reflecting mirror 12 as shown by the solid line in FIG. 4, the filament 37a is reflected from the non-reflecting end 19a as shown in FIG. 5(c). It is maximally protruded into the mirror 19. Therefore, all the light beams emitted from the maximum length L1 portion of the filament 37a are reflected by the reflective surface 19 and condensed, and the light beam nozzle 20
As shown in FIG. 6(c), a large amount of luminous flux 40 is irradiated onto the target soldering processing part. filament 3
A large amount of luminous flux emitted from 7a is regulated by the luminous flux nozzle 20 to a luminous flux amount 40a with a diameter of 6 mm.
This makes it possible to solder by local heating.

In this way, if the halogen lamp 37 is made to protrude into the reflection mirror 19 to the maximum extent by the vertical movement mechanism 27, the total length L1 of the filament 37a will extend beyond the reflection surface 19.
It is located inside the non-reflective end 19a of. Therefore, all of the light flux from the filament 37a is reflected and condensed by the reflecting surface 19, and a large amount of light flux 40 is obtained. Therefore, if this amount of luminous flux is further controlled and emitted by the luminous flux nozzle 20, it is possible to obtain the amount of luminous flux 40a that matches the size of the target processing area, and this regulated amount of luminous flux is Since the size is commensurate with

When the diameter of the soldered part is reduced to 4 mm compared to the above case, by moving the knob 28 into the guide groove 29 in the opposite direction to the above case, the screw can be tightened. The engagement between 24 and 26 gradually becomes shallower, and the movable sleeve 22 is raised in the vertical direction of the guide cylinder 1. As a result, the halogen lamp 37 is pulled up from inside the reflecting mirror 9 slightly upwards from the state shown by the solid line in FIG. 4, as shown by the dashed line in FIG. ), a portion thereof is positioned outward from the non-reflective end 19a.

However, the length L2 of the filament protruding into the reflecting mirror 19 is smaller than in the case of FIG. 5(c), and the light emitted from the filament 37a located outward from the non-reflecting end 19a is , substantially cut. Therefore, it is radiated from the filament length L2, and the reflecting surface 1
The amount of luminous flux 41 reflected and condensed by the beam nozzle 9 is small as shown in FIG. 6(b), and is irradiated from the luminous flux nozzle 20 as a luminous flux 40b having a size of 4 mm corresponding to the target processing part.

[0026] When the target soldered part is smaller in diameter, such as 2 mm, compared to the above case,
If the knob 28 is moved further into the guide groove 29 than in the case of FIG. be done. As a result, the halogen lamp 37 is moved further upward from within the reflecting mirror 9 as shown by the two-dot chain line in FIG. 4 compared to the position shown by the one-dot chain line in FIG. be lifted up.

As a result, most of the filament 37a of the halogen lamp 37 is pulled outward from the non-reflective end 19a, as shown in FIG. 5(a). Therefore, the total length L of the filament 37a projected into the reflecting mirror 19
3 is further shortened compared to the case shown in FIG. 5(b), and the light emitted from the filament located outward from the non-reflective end 19a is cut off. Therefore, the amount of luminous flux 42 emitted from the full length L3 of the filament 37a, reflected by the reflecting surface 19, and condensed is as shown in FIG. 6(a).
The amount of light is further reduced compared to the case shown in FIG. 6(b), and the light flux amount 42a is irradiated from the light flux nozzle 20 with a size of 2 mm, which corresponds to the target processing area.

In this way, the screw 24 of the movable sleeve 22
The movable sleeve 22 is moved up and down as the engagement portion between the halogen lamp 3 and the halogen lamp 3 becomes deeper or shallower.
The amount of protrusion and retraction of the filament 37a of No. 7 with respect to the reflecting mirror 19 is adjusted. Therefore, by reflecting all of the light from the filament 37a on the reflective surface 19, or by cutting the light from the filament 37a to restrict reflection on the reflective surface 19, the size of the soldered part can be adjusted. Since it becomes possible to easily obtain a suitable amount of luminous flux, local heating of the soldered part can be performed.

The embodiment shown in FIGS. 8, 9, and 10 differs from the previous embodiment only in the structure of the guide tube, so only the different parts will be explained, and the other parts are the same as those in the previous embodiment. Assign the same number to items that have the same number. The guide tube 100 is divided into a first guide tube 101 and a second guide tube 102. One end of the first guide cylinder 101 is formed into a straight fitting part 103, and the other end is provided with an air nozzle 2. A skirt portion 104 having an inner diameter slightly larger than the outer diameter of the fitting portion 103 is provided at one end of the second guide tube 102, and a flange 4 for attachment to the flange 5 of the handle 3 is provided at the other end. There is.

[0030] The fitting portion 103 and the skirt portion 104 are simply fitted and can rotate relative to each other, so that they can be easily removed. First guide tube 101 and second guide tube 1
The coupling with 02 is performed by the reflection mirror 19 and the vertical movement mechanism 27. Set screw 1 from the outside of the first guide tube 101
05 to the second mirror 12, and also the second guide tube 1
02. Screw the set screw 106 into the movable sleeve 25 of the vertical movement mechanism 27 from outside. Therefore, in this embodiment, in order to turn the fitting portion of the guide tube 100,
A knob for rotating the movable sleeve 25 is not required.

[0031]

Effects of the Invention As described above, a luminous flux nozzle is formed on the free end side of a reflecting mirror fixed in a guide cylinder, and a vertical movement mechanism for holding a halogen lamp is connected to the reflecting mirror, so that the halogen lamp can be moved up and down. It appears and disappears inside the reflecting mirror via a mechanism. Therefore, by moving the vertical movement mechanism, the amount by which the filament of the halogen lamp protrudes and retracts from the reflecting mirror can be adjusted steplessly, and the amount of luminous flux commensurate with the size of the soldered part can be easily obtained. , local heating can be performed. The amount of luminous flux can be easily adjusted from outside the device, and the adjusted amount of luminous flux performs local heating.
Heat is prevented from being supplied to areas other than the soldered parts, and reliability, especially for precision parts, can be improved. Furthermore, the amount of luminous flux can be adjusted by simply rotating the vertical movement mechanism, so no skill is required and the amount of luminous flux can be adjusted steplessly, making it suitable for various sizes of soldering parts It is possible to match.

[0032]

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a halogen lamp of a variable luminous flux welding device in a state where it is maximally projected into a reflecting mirror.

FIG. 2 is a sectional view taken along line II-II in FIG. 1;

FIG. 3 is an enlarged cross-sectional view of a vertical movement mechanism that moves the halogen lamp up and down.

FIG. 4 is an explanatory diagram of the effect in which a halogen lamp is caused to protrude and retract within a reflecting mirror by varying the amount of protrusion and retraction.

FIG. 5 is an explanatory diagram of the amount of protrusion and retraction of the filament into and out of the reflection mirror due to the vertical movement of the halogen lamp.

FIG. 6 is an explanatory diagram of the amount of luminous flux from the halogen lamp obtained by the amount of protrusion and retraction of the filament with respect to the reflecting mirror.

FIG. 7 is a longitudinal section showing another embodiment of a variable luminous flux type welding device.

FIG. 8 is a front view of a portion where the guide tube of the variable luminous flux welding device is divided and the divided portions are joined.

FIG. 9 is a partially enlarged sectional view of the connecting portion of the guide cylinder.

[Explanation of symbols]

1 Guide tube 9 Reflection mirror 20 Luminous flux nozzle 26 Movable sleeve 27 Vertical movement mechanism

Claims (10)

[Claims] 1. Holds a guide tube, a reflection mirror fixed in the guide tube, a light flux nozzle formed on the free end side of the reflection mirror, and a halogen lamp vertically movably connected to the reflection mirror. What is claimed is: 1. A variable luminous flux type welding device, comprising: a vertical movement mechanism, and configured such that a halogen lamp can move in and out of a reflecting mirror via the vertical movement mechanism. 2. The variable luminous flux welding apparatus according to claim 1, wherein the reflecting mirror is constructed by detachably coupling a first reflecting mirror and a second reflecting mirror. 3. A gap is provided between the reflecting mirror and a guide cylinder having an air nozzle, and cooling air is jetted from the air nozzle.
or 2. The variable luminous flux type welding device according to any one of 2. 4. The vertical movement mechanism includes a movable sleeve having a first adjustment screw provided on the outer peripheral surface of the cylindrical portion of the second mirror, a second adjustment screw coupled to the first adjustment screw, and a movable sleeve having a second adjustment screw coupled to the first adjustment screw. Claim 1, further comprising a knob fixed to the sleeve and movable within a guide groove provided in the guide tube.
The variable luminous flux type welding device described above. 5. The guide groove is formed along the vertical direction and the circumferential direction of the guide tube, and the knob is configured to move in the vertical direction while being rotated in the circumferential direction of the guide groove. The variable luminous flux type welding device according to claim 1 or 4. 6. The luminous flux amount according to claim 1, wherein the lamp holder holding the halogen lamp has a cross-shaped cross section, and one insertion convex portion is removably inserted into the movable sleeve. Variable welding equipment. 7. The luminous flux amount according to claim 2, wherein the handle is formed in a cylindrical shape, has a flange on one end thereof, an air filter on the other end thereof, and has a fan motor fixed therein. Variable welding equipment. 8. The variable luminous flux welding device according to claim 1, wherein the flange provided on the guide tube and the flange provided on the handle are detachably attached. 9. The guide tube is divided into two parts, one guide tube having an air nozzle on one end side and a fitting part on the other end side, and the other guide tube having a skirt part on one end side. 2. The variable luminous flux welding device according to claim 1, further comprising a flange for attaching a handle to the other end thereof, and the fitting portion and the skirt portion are rotatably fitted together. 10. A reflecting mirror is removably attached to one of the divided guide tubes, a vertical movement mechanism is detachably attached to the other guide tube, and the reflecting mirror and the vertical movement mechanism are screwed together. The variable luminous flux type welding device according to claim 1, characterized in that the welding device has a variable luminous flux amount type welding device.