JPH10135620A - Wave soldering equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wave soldering equipment which can eliminate a bad soldering such as a bridge by setting a fly-out angle for jet-out waves properly. SOLUTION: Melted solder is jetted out in the direction opposite to the work advancement direction through a jetting hole 75 of a nozzle 67 toward a work, which is moved on a work carriage line 77 above the nozzle 67. An fly-out angle θ1 of jet-out waves W2 jetted out through the jet-out hole 75 of the nozzle 67 is set to the level at least 25 deg. and at most 35 deg. against the work carriage line 77. And, the diameter at the end of the jet-out hole 75 of the nozzle 67 is set to the range at least 1.0mm and at most 1.7mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet brazing apparatus used for brazing (including soldering) components mounted on a board.

[0002]

2. Description of the Related Art As shown in Japanese Patent Publication No. 2-31628, a molten brazing material is applied to a workpiece conveyed on a nozzle from an ejection hole of the nozzle by an electromagnetic pump in a direction opposite to the workpiece traveling direction. There is a jet brazing device that brazes by jetting a jet.

[0003] In this conventional jet brazing apparatus, the jet angle of the jet wave jetted from the jet hole of the nozzle is set to about 50 ° with respect to the work transfer line. Further, it is common practice to set the projection angle to 45 ° or more.

[0004]

In a brazing apparatus in which a brazing material is jetted in a direction opposite to a work traveling direction as in this conventional apparatus, the brazing material is moved 45 degrees to the work transfer line.
When the jet angle of the jet wave was set to more than °, the angle was too large, and it was found that the jet wave velocity at the brazing portion could not be set appropriately.

That is, such a nozzle is arranged downstream of the primary nozzle for forming an irregular turbulent jet wave in the work transfer direction to form a smooth rectifying finish jet wave. When used as a secondary nozzle, the jet wave of the brazing filler metal is too high, and a sufficient flow velocity is not obtained at the brazing part at the top of the jet wave, and the board mounted component as a work It has been found that a higher flow rate is required to eliminate the so-called bridging phenomenon in which a brazing material is bridged therebetween.

At a jet wave launch angle of 45 ° or more, it is possible to increase the flow velocity of the jet wave by increasing the pump pressure or the like. In this case, however, the top dead center of the nozzle and the jet wave is reduced. The distance from the attachment portion becomes extremely large and cannot be put to practical use.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a jet brazing apparatus which improves brazing failure such as a bridge in terms of a jet wave projection angle. Things.

[0008]

According to the first aspect of the present invention, a molten brazing material is opposed to a workpiece conveyed by a workpiece conveying line on a nozzle from an ejection hole of the nozzle in a workpiece traveling direction. In the jet type brazing apparatus in which the jet wave is jetted in the direction, the jet angle of the jet wave jetted from the jet hole of the nozzle is set to 25 ° with respect to the work transfer line.
This is a jet brazing device set at 35 ° or less.

The projection angle of 25 ° or more is an angle necessary to prevent interference between the nozzle and the workpiece.
An ejection angle of 35 ° or less is an angle necessary to secure a high-speed brazing material flow velocity necessary for eliminating brazing defects such as bridges.

According to a second aspect of the present invention, in the jet brazing apparatus according to the first aspect, the gap at the tip of the ejection hole of the nozzle is set to 1.0 mm or more and 1.7 mm or less.

The gap of 1.0 mm or more is a gap necessary for preventing clogging at the nozzle orifice.
The gap of 1.7 mm or less is a gap necessary for preventing the jet wave of the brazing material from being disturbed and waving.

According to a third aspect of the present invention, in the jet brazing apparatus according to the first or second aspect, the ejection hole of the nozzle is formed at an angle of 30 to 45 ° in a plan view with respect to the width direction of the workpiece. It is elongated in the inclined direction.

The angle of 30 to 45 ° is an angle range that is effective for eliminating brazing defects such as bridges.

According to a fourth aspect of the present invention, in the jet brazing apparatus according to any one of the first to third aspects, the nozzle receives supply of brazing material from an electromagnetic induction pump.

[0015] The brazing material jetted by the electromagnetic induction pump has a small height fluctuation due to the pump pulsation, and keeps the height of the brazing material jet wave stable and constant.

According to a fifth aspect of the present invention, in the jet brazing apparatus according to any one of the first to fourth aspects,
A secondary nozzle for forming a smooth rectifying finish jet wave by arranging a nozzle downstream of the primary nozzle for forming an irregular turbulent jet wave in the work transfer direction. It is.

[0017] Then, a brazing failure portion such as a bridge caused by brazing at the primary nozzle is shaped by a high-speed finishing jet wave which is jetted from the secondary nozzle and which is more horizontal than the conventional one.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In addition, brazing means a high-level concept including soldering.

As shown in FIG. 2, one tank 33 is provided for accommodating a conductive brazing material 32 such as tin or indium. The tank body 33 forms a pump tank part 37 by a bottom plate part 34, vertical plate parts 35 and 36 located below the work loading side and the work discharge side, and a side plate part (not shown).
The horizontal plate portions 38 and 39 located above the work carry-in side and the work carry-out side, the vertical plate portions 41 and 42, the upper edges 43 and 44, and the side plate portions (not shown) form a jet wave forming tank portion 45. I do.

A first electromagnetic induction pump 46 is provided vertically along a vertical plate portion 35 on the work loading side of the one tank body 33, and is arranged along a vertical plate portion 36 on the work discharge side of the tank body 33. Thus, the second electromagnetic induction pump 47 is provided in the vertical direction.
These electromagnetic induction pumps 46 and 47 are flat linear induction pumps (FLIP), which are a type of a cage induction pump.

The first electromagnetic induction pump 46 and the second electromagnetic induction pump 47 are provided on an outer surface of each of the vertical plate portions 35 and 36 on the work loading side and the work unloading side in the tank body 33, respectively.
The wound primary iron core 52 is disposed in close contact with the vertical plate portions 35 and 36, respectively, and is placed inside the vertical plate portions 35 and 36 through a brazing material ascending gap 53 as a brazing material pressure feeding gap. The secondary iron cores 54 are respectively arranged.

The primary iron cores 52 on the work carry-in side and the work carry-out side are formed by stacking a large number of thin E-shaped iron plates in the width direction (perpendicular to the plane of FIG. 2). A number of grooves 55 opened toward the parts 35 and 36 are vertically arranged so as to face each other.
The induction coil 51 is wound between 55.

That is, the primary iron core 52 is composed of a plurality of E-shaped iron cores 52E which are divided through division surfaces perpendicular to the vertical plate portions 35 and 36.
Are arranged in the up and down direction in close contact with the outer surfaces of the vertical plate portions 35 and 36 of the tank body 33.

Each of the E-shaped iron cores 52E is provided with a primary iron core pressing mechanism 81 in order to prevent a reduction in the efficiency of electromagnetic induction on the primary iron core side.
As a result, it is pressed and closely attached to the outer surface of the tank body 33.

In the primary iron core pressing mechanism 81, mounting plates 82 are integrally provided on upper and lower portions of the vertical plates 35, 36 of the tank body 33, and a screw threaded plate 84 is integrally formed between the mounting plates 82 by screws 83. The pressing plate is provided by the tip of the screw 85 screwed into the screw screwing plate 84.
Press the back of each E-shaped iron core 52E individually through
The tip of the leg of the iron core 52E is brought into close contact with the vertical plates 35 and 36 of the tank body 33.

The secondary iron core 54 is an I-shaped iron core formed by laminating a large number of thin I-shaped iron plates in the width direction (perpendicular to the plane of FIG. 2), and a slope having a suction port 56 formed at the lower end thereof. Part 57
Is provided at the upper end, and a core insertion hole 59 of the nozzle mounting base plate 58 is provided.
A slope portion 60 fitted inside is provided, and the iron core insertion hole 59 is provided.
The slope 60 forms a discharge port 61 that opens upward. The nozzle mounting base plate 58 is a horizontal plate part of the tank body 33.
It is attached to 38 and 39.

Further, a spacer 62 (FIG. 3) is interposed between the secondary iron core 54 formed in a flat plate shape and each of the vertical plate portions 35 and 36, so that a brazing material as shown in FIG. An ascending gap 53 is formed.

As shown in FIG. 2 or FIG.
In order to prevent a reduction in the efficiency of electromagnetic induction on the secondary core side, the secondary core 54 is pressed against the spacer 62 by the secondary core pressing mechanism 86 over the entire length and is brought into close contact therewith.

The secondary core pressing mechanism 86 includes vertical plate portions 35 and 36.
The spacer 62, the mounting plate 87, the spring receiving plate 88, and the wedge plate portion 88a are sequentially welded to each other and integrally attached thereto, while the secondary core 54 and the spring member 89 integrally attached to the secondary core 54 are attached. Into the core insertion hole 59 of the nozzle mounting base plate 58.
It is detachably inserted from above through the through hole.

As shown in FIG. 2, the wedge plate portion 88a of the spring receiving plate 88 is located at a position corresponding to the spring member 89.
The spring member 89 which is lowered is pressed by a slope formed at the upper end thereof.

The spring member 89 of the secondary iron core pressing mechanism 86 is screwed to the lower end of a leaf spring formed in the shape of a letter on the secondary iron core 54, and the secondary iron core 54 and the spring member 89 are connected to the spacer 62 (see FIG. It is inserted between 3) and the wedge plate portion 88a of the spring receiving plate 88. The U-shaped spring member 89 has a shape that is easy to slide with respect to a contact partner when the secondary iron core 54 is pulled up or inserted downward during maintenance.

As described above, the spacer 62 and the wedge plate portion 88a of the spring receiving plate 88 are integrally provided on the tank body 33 side.
The secondary core 54 is removably attached to the inside of the tank body 33 by being inserted together with the spring member 89 from above from the core insertion hole 59 of the nozzle mounting base plate 58 between the spacer 62 and the wedge plate portion 88a. .

That is, the secondary iron core 54 has a mounting structure that can be pulled out upward by removing the nozzles 66 and 67 when maintenance or the like is required.

In FIG. 2, a pump tank portion of one tank body 33 is shown.
A plurality of heaters 65 for melting the brazing material 32, which are located at an intermediate portion between the first electromagnetic induction pump 46 and the second electromagnetic induction pump 47, are vertically arranged at the center of the 37. The heater 65 is a sheath heater that is long in the width direction (perpendicular to the plane of FIG. 2).

The first electromagnetic induction pump 46 and the second
Above the electromagnetic induction pump 47, the brazing material 32 is spouted irregularly to form an irregular turbulent jet wave (hereinafter referred to as a primary jet wave W1).
To form a smooth rectifying finish jet wave (hereinafter, referred to as a secondary jet wave W2) disposed downstream of the primary nozzle 66 in the work transfer direction. And the secondary nozzles 67 are provided.

That is, the primary nozzle 66 is mounted on the nozzle mounting base plate 58 into which the upper end of the secondary core 54 on the work carrying side is fitted, and the upper end of the secondary core 54 on the work carrying side is fitted. The secondary nozzle 67 is mounted on the nozzle mounting base plate 58.

The primary nozzle 66 is provided with a jet plate 72 having a large number of jet holes perforated in an opening 71 at the upper end. Forming W1.

The secondary nozzle 67 has a convex portion 73 bulging in the direction of movement of the work P, an upper plate 74 projecting from the convex portion 73 in a direction opposite to the direction of movement of the work P, and With the lower plate 76 provided below the upper plate 74 via the brazing filler hole 75, a smooth secondary for shaping finish is jetted in a rectifying manner in the direction opposite to the traveling direction of the work P. A jet wave W2 is formed. The convex portion 73 has a function of making the brazing material ascending pressure uniform over the entire cross section by temporarily enlarging the cross section of the secondary nozzle 67.

As shown in FIG. 1, this secondary nozzle 67
Is a method in which a brazing material in a molten state is jetted from an ejection hole 75 onto a work P conveyed on a work conveyance line 77 on a nozzle in a direction opposite to a work traveling direction to braze the brazing material. Secondary jet wave W immediately after jetting from jet hole 75
The angle θ1 of the projecting direction Do (this angle is referred to as the projecting angle) is 25 ° at an included angle with respect to the work transfer line 77.
Set to not less than 35 °.

The projection angle θ1 of 25 ° or more is an angle required to secure a jet height for preventing interference between the secondary nozzle 67 and the work P under normal pump pressure. Also,
The projection angle θ1 of 35 ° or less is an angle necessary to secure a high-speed brazing material flow rate effective for eliminating brazing defects such as bridges.

The ejection hole 75 of the secondary nozzle 67 is provided with a gap L at the tip.
Is set to 1.0 mm or more and 1.7 mm or less. 1.0
The gap L of not less than mm is a gap necessary for preventing the possibility that the brazing filler metal or the like is clogged in the ejection hole 75 of the secondary nozzle 67. The gap L of 1.7 mm or less is a gap necessary for preventing the secondary jet wave W2 from being disturbed and waving. As the secondary jet wave W2 becomes thinner, the rectification (laminar flow) state can be maintained, and as the thickness increases, it becomes difficult to maintain the laminar flow state, and the state shifts to a turbulent flow state.

Next, a first electromagnetic induction pump 46 provided vertically along the vertical plate portion 35 of the tank body 33 on the work loading side.
Is composed of two sets of left and right electromagnetic induction pumps 46a and 46b arranged in a direction intersecting at an angle θ2 with respect to the width direction of the work P as shown in FIG. The second provided vertically along the vertical plate portion 36
The electromagnetic induction pump 47 of FIG.
And two sets of left and right electromagnetic induction pumps 47a and 47b arranged in a direction intersecting at an angle θ2 with respect to the width direction.

As shown in FIG. 3, the first electromagnetic induction pump 46 and the second electromagnetic induction pump 47 include a primary iron core 52a and a secondary iron core 54a on one side, and a primary iron core on the other side.
Although the secondary core 52b and the secondary core 54b are separately formed, a common induction coil 51 is used from the primary core 52a on one side to the primary core 52b on the other side.

By this common induction coil 51, one electromagnetic induction pump 46a and the other electromagnetic induction pump 46b on the workpiece loading side, and one electromagnetic induction pump 47a on the workpiece unloading side and the other electromagnetic induction pump 47a on the workpiece unloading side. The electromagnetic induction pump 47b is linked with each other.

Further, as shown in FIG. 3 or FIG. 5, the brazing material ascending gap 53 has two sets of left and right brazing material ascending gaps 53a, 53a.
The discharge port 61 comprises two sets of left and right discharge ports 61a and 61b as shown in FIG. 4 or FIG.

Since the opening edges of the discharge ports 61a and 61b are formed so as to expand upward on all four sides, the molten brazing material is filled with the brazing material rising gaps 53a and 53a having a small sectional area.
When transitioning from 53b to a nozzle 66 or 67 having a large cross-sectional area, it can be smoothly and evenly expanded in four directions.

On the other hand, as shown in FIG. 4 or FIG.
The primary nozzle 66 on the work loading side is connected to the left and right 2
One is provided so as to surround the pair of discharge ports 61a and 61b. Similarly, the secondary nozzle 67 has two sets of left and right discharge ports on the work discharge side.
One is provided so as to surround 61a and 61b.

The depth of these nozzles 66 or 67 has the function of equalizing the pressure of the molten brazing material.
The wave height of the jet wave jetting from the primary nozzle 66 or the secondary nozzle 67 can be made uniform throughout the longitudinal direction.

In this way, two sets of left and right electromagnetic induction pumps 46a and 46b or electromagnetic induction pumps 47a and 47b
A jet wave with sufficient wave width and uniform wave height is secured.

Further, as shown in FIG. 4, the primary nozzle 66 and the secondary nozzle 67 each have an angle θ 2 inclined at 30 to 45 ° in a plan view with respect to the width direction of the work P.
Is formed. Therefore, the ejection hole of the secondary nozzle 67
75 is also 30 to 4 in a plan view in the width direction of the work P.
It is elongated in a direction inclined at 5 °.

The angle θ2 of 30 to 45 ° set in the ejection hole 75 of the secondary nozzle 67 is such that the brazing material jetted from the secondary nozzle 67 hits the board mounting parts of the work and the like obliquely and separates. Thereby, the bridge can be cut smoothly, and it is effective in eliminating a brazing defect such as a bridge.

Next, the operation of the illustrated embodiment will be described.

First and second electromagnetic induction pumps 46 and 47
Is supplied with an alternating current, such as a three-phase alternating current, to the induction coils 51 vertically arranged along the brazing filler metal gap 53 of the conductive brazing filler metal, so that a moving magnetic field is generated in the brazing filler metal gap 53. And an electromotive force is generated by electromagnetic induction in the conductive brazing material 32 in the brazing material ascending gap 53, and the current caused by the electromotive force of the brazing material 32 flows in the magnetic flux of the moving magnetic field, so that the brazing material 32 An upward thrust is applied to move the brazing material upward.

Thus, the brazing material 32 in the molten state melted by the common heater 65 is supplied to the electromagnetic induction pumps 46 and 47 respectively.
, Rises along the brazing material ascending gap 53 along the vertical plate portions 35 and 36 on the work carry-in side and the carry-out side of the tank body 33, and is discharged from each discharge port 61, and the primary nozzle 66 and a secondary nozzle 67, the jet P is jetted as a primary jet wave W1 and a secondary jet wave W2, and the component mounted on the substrate surface of the work P carried in and ejected from each jet wave is brazed to the substrate surface. It falls to the part 45 and circulates to the pump tank part 37.

Since the brazing material ascending gap 53 is formed linearly upward and is not bent, the brazing material ascending gaps 53a, 53b of the two sets of electromagnetic induction pumps 46a, 46b or 47a, 47b are provided on the left and right portions. And the left and right discharge ports 61a and 61b are surrounded by a common nozzle 66 or 67.
A primary jet wave W1 or a secondary jet wave W2 having a uniform wave height distribution over the entire width in the longitudinal direction of 66, 67 is obtained.

For this reason, a work having a large width that could not be handled by only one discharge port 61a, or an angle θ2 between the width direction of the work P and the longitudinal direction of the nozzles 66 and 67 as shown in FIG. Can be easily coped with.

The primary jet wave W1 ejected from the primary nozzle 66 and moving irregularly in a protruding manner surely penetrates into the minute component gaps of the high-density mounting substrate, and has good wettability at all brazing portions. In addition, the smooth secondary jet wave W2 ejected from the secondary nozzle 67 and formed into an arc shape shapes an excessive primary brazing portion, and brazes a so-called bridge or icicle. Correct the defect.

At this time, as shown in FIG. 1, the secondary nozzle 67 has a thin film straightening shape from the ejection hole 75 of the narrow gap L set to 1.0 to 1.7 mm and the included angle with respect to the work transfer line 77. At a jetting angle θ1 that is closer to the horizontal than 25 to 35 °, and the high-speed secondary jet wave W2 jetted in the direction opposite to the work traveling direction is poor in brazing due to the primary jet wave W1 from the primary nozzle 66. Shape the part effectively.

That is, even if the turbulent primary jet wave W1 irregularly jetted from the primary nozzle 66 may cause a brazing failure portion such as a bridge or an icicle at the brazing portion, the brazing portion is more horizontal than the conventional one. Is finished so as to cut off a brazing failure part such as a bridge by a smooth and rectified secondary jet wave W2 jetted at a high speed from a secondary nozzle 67 close to.

Further, since the electromagnetic induction pump 47 hardly generates a pump pulsation which is a fluctuation of the pump discharge pressure as seen in the impeller type pump, the fluctuation of the brazing material jet height due to the pump pulsation is small and the electromagnetic induction pump 47 has a small height. The height Y of the top dead center of the jet wave can be stably kept constant.

Next, the operation in maintenance will be described. If the primary nozzle 66 and the secondary nozzle 67 are removed, the secondary iron core 54 located below them can be easily removed from the tank body 33. Maintenance of the secondary iron core 54 and the nozzles 66 and 67 themselves, cleaning of the brazing filler metal ascending gap 53 of the electromagnetic induction pumps 46 and 47, and the like can be easily performed.

That is, when the secondary core 54 is shifted upward in FIG. 2, the spring member 89 integrated with the secondary core 54
The spring member 89 is separated from the wedge plate 88a of the
Since the force pressing the 54 against the spacer 62 becomes weaker, the secondary core 54
And the spring member 89 can be easily pulled upward.
Further, since the brazing filler metal ascending gap 53 from the suction port 56 to the discharge port 61 of the secondary core 54 can be enlarged, oxides and the like clogged in the suction port 56 and the like can be easily removed, and maintenance can be easily performed. .

The suction port 56 located in the vicinity of the bottom plate 34 is sufficiently deeper than the surface of the brazing material 32 on which oxides and the like float, so that the entry of oxides and the like into the suction port 56 does not easily occur. Although it has an advantage, even if oxides and the like are clogged in the suction port 56, the oxides and the like can be easily removed by the decomposition.

Further, by reversing the phase of the three-phase alternating current supplied to the induction coil 51,
Since the brazing material 32 inside can be driven reversely downward,
Oxide and the like clogged in the lower suction port 56 can be removed very easily by the backwashing action of the brazing filler metal which is back-sprayed.

[0065]

Next, embodiments of the present invention will be described based on specific numerical values.

In FIG. 1, the gap L between the ejection holes 75 of the secondary nozzle 67 is set to 1.0 to 1.7 mm, and the ejection angle θ1 of the secondary jet wave W2 ejected from the ejection holes 75 is determined by the work. The included angle with respect to the transport line 77 is set to 25 to 35 °.
In FIG. 4, when the secondary nozzle 67 is viewed in a plan view, the angle θ2 at which the slit-shaped ejection hole 75 is inclined with respect to the work width direction is set to a direction of 30 to 45 °.

The top dead center position S at which the secondary jet wave W2 comes into contact with the workpiece P to perform brazing is set near the distance X = about 20 mm in the direction opposite to the workpiece traveling direction from the tip of the secondary nozzle 67. Even at this point, the initial velocity of the secondary jet wave W2 can be set as high as about 70 cm / sec at a low position where the height TDC of the jet wave from the nozzle tip is about 5 to 6 mm. At the point position S, a brazing speed as high as about 60 cm / sec is obtained. The conventional brazing speed is about 3 at maximum.
It was about 0 cm / sec.

As a result of the actual brazing under the conditions of such a high-speed brazing material jet, the bridge failure in the connector as the work P can be reduced to about 1/30 of that of the conventional one, which is greatly improved. Was confirmed.

When the electromagnetic induction pump 47 is used,
It was also confirmed that the vertical fluctuation of the jet wave top dead center height Y was suppressed to within 0.5 mm and high quality could be ensured.

Since the projection angle θ1 of the conventional secondary jet wave W2 is 45 ° or more, the height Y of the top dead center of the jet wave is 1
Although it is 0 mm or more, the brazing speed is limited to about 30 cm / sec, and in the conventional impeller pump,
Regardless of the setting of the projecting angle θ1, the vertical fluctuation of the jet wave top dead center height Y is large and unstable.

[0071]

According to the first aspect of the present invention, by setting the jetting angle of the jet wave to 35 ° or less with respect to the work transfer line, it is possible to eliminate brazing defects such as bridges. A certain high-speed brazing material flow velocity can be secured, and the brazing performance can be improved in terms of the jet wave launch angle. In addition, the launch angle of the jet wave is set to 25.
By setting the angle to not less than °, the required wave height on the nozzle can be secured and interference between the nozzle and the work can be prevented.

According to the second aspect of the present invention, by setting the gap at the tip of the ejection hole of the nozzle to be 1.7 mm or less, it is possible to prevent the occurrence of a phenomenon in which the brazing material jet wave is disturbed and undulates, such as a bridge. It is possible to effectively obtain a smooth and rectifying finish jet wave required for eliminating brazing defects. Also, by setting the gap to 1.0 mm or more,
Clogging at the nozzle orifice of the nozzle can be prevented.

According to the third aspect of the present invention, the ejection hole of the nozzle has a thickness of 30 to 4 in a plan view in the width direction of the work.
Since it was elongated in the direction inclined at 5 °, the brazing material jetted from the nozzle was not
The bridge can be removed smoothly by hitting it obliquely, which is effective in eliminating poor brazing.

According to the fourth aspect of the present invention, the nozzle comprises:
Since the brazing material is supplied and jetted from the electromagnetic induction pump with little pump pulsation, the fluctuation of the height of the brazing material jet wave is small, and a constant wave height can be stably secured to obtain uniform brazing quality. .

According to the invention set forth in claim 5, claims 1 to 5
By setting the nozzle 4 as a secondary nozzle disposed downstream of the primary nozzle in the work transfer direction, a brazing failure portion such as a bridge caused by brazing of the primary nozzle can be made closer to a horizontal state than before. The smooth and rectified finishing jet waves jetted at a high speed from the secondary nozzle can be reliably shaped and a highly reliable brazing quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a main part of a jet brazing apparatus according to the present invention.

FIG. 2 is a cross-sectional view showing one embodiment of the entire jet brazing apparatus.

FIG. 3 is a sectional view showing an electromagnetic induction pump of the jet brazing apparatus.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

 32 Brazing material 46,47 Electromagnetic induction pump 66 Primary nozzle 67 Secondary nozzle 75 Injection hole 77 Work transfer line P Work θ1 Projection angle L Gap W2 Jet wave

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koji Saito 1-19-43 Higashi-Oizumi, Nerima-ku, Tokyo Inside the Tamura Corporation (72) Inventor Shikio Hasegawa 591-11, Hirosaki, Oaza, 11-figure shares in Sayama City, Saitama In the company Tamura FA system

Claims (5)

[Claims] 1. A jet brazing apparatus in which a brazing material in a molten state is jetted from an ejection hole of a nozzle to a work conveyed on a work conveyance line on the nozzle in a direction opposite to a work traveling direction to braze. A jet-type brazing apparatus, wherein the jet angle of the jet wave jetted from the jet hole of the nozzle is set to be not less than 25 ° and not more than 35 ° with respect to the work transfer line. 2. The ejection hole of the nozzle has a gap at the tip of 1.0.
2. The jet brazing apparatus according to claim 1, wherein the setting is not less than 1.0 mm and not more than 1.7 mm. 3. The jet flow type according to claim 1, wherein the ejection hole of the nozzle is formed to be elongated in a direction inclined at an angle of 30 to 45 ° in a plan view with respect to the width direction of the work. Brazing equipment. 4. The jet brazing apparatus according to claim 1, wherein the nozzle receives supply of brazing material from an electromagnetic induction pump. 5. A nozzle for forming a smooth rectification-like finishing jet wave by disposing a nozzle downstream of a primary nozzle for forming an irregular turbulent jet wave in a workpiece conveying direction. The jet brazing apparatus according to any one of claims 1 to 4, wherein the brazing apparatus is a next nozzle.