JP2576399B2 - Jig for electron beam welding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for an electron beam welding machine used for welding three different types of objects to be welded.
The present invention relates to a jig for an electron beam welding machine for welding along an annular welding line by an electron beam passing outside and inside the pressurized portion.

[0002]

2. Description of the Related Art Conventionally, three to-be-welded workpieces 7 shown in FIGS. 12 and 13 are fitted to annular welding lines 19 and 20 using electron beams 3 and 4. As a method of welding along, a method of welding the workpiece 7 without pressing is performed.

A method of performing welding without pressurizing the workpiece 7 will be described with reference to FIG. in this way,
The work 7 to be welded arranged at the center of the work 7
b, the workpiece 7 is integrally rotated by the work guide 11 without being mutually pressed, and the electron beam 3 is sequentially switched from the electron beam 3 to the electron beam 4 from above, and the workpiece 7 is welded. I do.

However, in the above method, the object 7 to be welded is thermally affected by the electron beams 3 and 4 to cause distortion. The welding target 7 does not have a binding force to correct this distortion, and therefore cannot be welded in close contact with each other, or because welding is performed with warpage occurring,
There was a problem that accurate irradiation positions of the electron beams 3 and 4 could not be obtained.

In order to solve the above-mentioned problem, there is a method of rotating and welding the object 7 while applying pressure to the object 7 from above.

This method will be described with reference to FIGS. 9 and 10.

[0007] In FIG. 9, the object 7 b at the center is pressed against the other objects 7 a and 7 c from above by the pressure ring 6, and the object 7 to be welded is integrated by the work guide 11. , And welded objects 7b and 7a and 7c are welded by the electron beams 3 and 4 emitted from above. At that time, pressurizing ring 6
Is held by the bearing 18 together with the inner guide 9 and the outer guide 10, and rotates together with the workpiece 7.

[0010] In FIG. 10, similarly to FIG. 9, the central workpiece 7 b is pressed against the other workpieces 7 a and 7 c from above by the pressure ring 6, and the workpiece 7 is covered by the work guide 11. The object 7 to be welded is rotated integrally, and the object 7b to be welded and the objects 7a and 7c to be welded are welded by the electron beams 3 and 4 emitted from above. At that time, the pressure ring is composed of the inner guide 9 and the outer guide 1
0 and is held by the bearing 18 and rotates together with the workpiece 7.

In the method of rotating and welding the object 7 while pressing the object 7 from above, the bearing holding the inner guide 9 and the outer guide 10 is shown in FIG. Therefore, there is a problem that welding can be performed only on the inner side of pressurizing the workpiece 7, that is, by the electron beam 4. Similarly, in FIG. 10, a bearing 18 for holding the inner guide 9 and the outer guide 10 is provided.
In addition, there is a problem that only the outer side of pressing the object 7 to be welded, that is, welding by the electron beam 3 can be performed.

The above problem can be solved by appropriately replacing the upper jig having the configuration shown in FIGS. 9 and 10, but the time and labor required for the replacement are extremely long. there were.

To solve this problem, a welding jig shown in FIG. 11 is used.

In FIG. 11, each member of the inner guide 9 and the outer guide 10 is used as a bearing 18, and a central welded object 7b is pressed from above by a pressing ring 6, and the electron beam 3 and the electron beam 4 are sequentially transmitted. Irradiate and weld. At this time, the bearing 18 is provided between the pressure ring 6 and the workpiece 7b.
The object 7 to be welded is integrally rotated due to the contact resistance with the object.

[0013]

In the jig for an electron beam welding machine shown in FIG. 11, the inner guide and the outer guide are in contact with each other over a wide area, and the force for applying pressure is slightly increased. By deviating from the center, the frictional resistance between the inner guide and the outer guide becomes larger than the frictional resistance between the pressure ring and the workpiece. As a result, the object to be welded does not rotate smoothly, and as a result, there is a problem that the annular welding is discontinuous or not welded at all.

Further, in order to solve the above-mentioned problem, it is conceivable to insert a ball bearing between the inner guide and the outer guide. When the outer electron beam was irradiated, the distance between the two could not be kept.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a jig for an electron beam welding machine according to the present invention supports three different types of objects to be welded fitted from below and rotates the same. A lower jig to be driven, and an outer guide that presses an object to be welded arranged at the center of the objects to be welded from above, and rotates integrally with the lower jig and the object to be welded, and an outer guide. And an upper jig having an inner guide fixed to the outer guide, and a steel ball is provided in a gap formed by the outer guide and the inner guide.

[0016]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the present invention.

In the jig for an electron beam welding machine of the present invention shown in FIG. 1, an object 7b to be welded is welded to an object 7a to be welded and an object 7c to be welded as shown in FIG. The configured welding target 7 is
a and the workpiece 7c are installed on the work guide 11 so as to be supported. The work guide 11 is attached to a lower jig base 12 via a spring 13 for reducing an impact generated when the workpiece 7 and the pressure ring 6 come into contact with each other. It is installed on a station shaft 14 that is rotated by a drive source (not shown). The pressure ring 6 is fixed to the outer guide 10 and presses the workpiece 7b from above. When the station shaft 14 rotates, the press ring 6 and the outer guide 10 rotate integrally with the lower jig base 12, the work guide 11, and the workpiece 7 provided on the upper part thereof. . The inner guide 9 is fixed to the upper jig base 8, and the upper jig base 8 has a passage hole 16 through which the electron beam 3 and the electron beam 4 pass. Between the inner guide 9 and the outer guide 10, there is provided a steel ball 1 which receives a vertical load at an uneven joint portion at an upper portion thereof, and a radial load 1 at a lower portion.
7, a steel ball 2 is provided.

Next, the arrangement of the steel balls 1 will be described with reference to FIGS. 1, 2 and 3. FIG.

Here, FIG. 2 is a perspective view showing the inner guide 9 and the steel ball 1 and the steel ball 2 in FIG.
FIG. 3 is a sectional view taken along the plane P in FIG.

The vertical load acting between the inner guide 9 and the outer guide 10 is a force generated in a vertical direction by pressing the workpiece 7. In order to support this vertical load, FIG. As shown in FIGS. 2 and 3, the inner guide 9 and the outer guide 10
Three steel balls 1 are annularly arranged on the same plane, respectively, at the two-step uneven joint portion provided in the gap between the steel balls (see FIG. 3). Here, three steel balls 1 are provided at equal intervals in order to maintain the balance of the horizontal force by three-point support, and any number of three or more steel balls may be provided. Also, upper and lower 2
The parts to be welded are provided in stages.
This is to prevent the outer guide 10 from dropping when the pressurization is stopped.

Next, the arrangement of the steel balls 2 will be described with reference to FIGS. 1, 2 and 4. FIG. Here, FIG.
3 is a cross-sectional view of the Q plane in FIG.

The radial load 17 acting between the inner guide 9 and the outer guide 10 means that the outer guide 10 and the pressure ring 6 and the like rotate integrally with the rotation of the station shaft 14. As shown in FIG. 4, three forces are generated in the gap between the inner guide 9 and the outer guide 10 in order to support the radial load 17. Steel balls 2 are arranged at equal intervals in an annular shape, and as shown in FIGS.
The combination of the steel balls 2 consisting of
And two sets are arranged above and below a cylinder comprising the outer guide 10 and the outer guide 10. Here, the three steel balls 2 are provided at equal annular intervals in order to maintain the balance of the horizontal force by three-point support, and any number of three or more steel balls may be provided. Further, the two sets of the steel balls 2 arranged above and below the cylinder are because the radial load 17 is a force acting from all positions of the rotary shaft 15, and in order to eliminate the inclination of the shaft, at least, This is because two sets of steel balls 2 are required above and below.

Next, the upper jig base 8 will be described with reference to FIG.

FIG. 5 is a perspective view showing the upper jig base 8 shown in FIG. 1. The upper jig base 8 is irradiated with the electron beam 3 and the electron beam 4 from above. A beam passage hole 16 is provided in a portion where the electron beam 3 and the electron beam 4 pass. The beam passage hole 16 is made larger than the beam interval 5 in order to prevent interference between the electron beams 3 and 4.

Next, the operation of welding using the jig for an electron beam welding machine of the present invention will be described.

First, the three types of the welded objects 7 fitted and fitted are set on the work guide 11 so that the welded objects 7a and 7c are supported, and the pressure ring 6 Thus, the work 7b is pressurized. Next, the electron beam 3 and the electron beam 4 are irradiated onto the welding lines 19 and 20 of the workpiece 7. In accordance with the irradiation of the electron beams 3 and 4, the station shaft 14 is used.
Is driven to rotate. With the rotation of the station shaft 14, the object 7 to be welded also rotates, and the outer guide 10, the pressure ring 6, and the like also rotate integrally. Here, the inner guide 9 and the upper jig base 8 remain fixed. Further, by providing the steel ball 1 and the steel ball 2 between the inner guide 9 and the outer guide 10, the rotation becomes smooth.

By rotating the workpiece 7 in this manner, the electron beam 3 passing through the outside of the pressure ring and the electron beam 4 passing through the inside of the pressure ring are formed into an annular welding line 19,
Thus, the object 7 to be welded is welded.

[0029]

As described above, the jig for an electron beam welding machine according to the present invention applies an object to be welded arranged at the center of three types of objects to be welded fitted from above to above. As a bearing for the upper jig that presses and rotates horizontally, steel balls that are equally divided in an annular shape and steel balls that are equally divided in a cylindrical shape are used to receive loads acting in the vertical and horizontal directions. The rotation of the welding object becomes smooth. In addition, by irradiating an electron beam passing outside the pressurized portion and an electron beam passing inside the pressurized portion along an annular welding line in a state where the object to be welded is pressed, welding with a small beam interval can be performed. In addition, weldability is improved, and welding distortion can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the inner guide of FIG. 1;

FIG. 3 is a sectional plan view of a plane P in FIG. 2;

FIG. 4 is a sectional view taken along the plane Q of FIG. 2;

FIG. 5 is a perspective view showing an upper jig base in FIG. 1;

FIG. 6 is a vertical sectional view illustrating a radial load.

FIG. 7 is a horizontal sectional view illustrating a radial load.

FIG. 8 is a sectional view showing a conventional jig for an electron beam welding machine.

FIG. 9 is a sectional view showing a conventional jig for an electron beam welding machine.

FIG. 10 is a sectional view showing a conventional jig for an electron beam welding machine.

FIG. 11 is a sectional view showing a conventional jig for an electron beam welding machine.

FIG. 12 is a perspective view showing an object to be welded.

FIG. 13 is a perspective view cut along the YY plane of FIG. 12;

[Explanation of symbols]

 1, 2 steel ball 3, 4 electron beam 5 beam interval 6 pressure ring 7 workpiece 7a outer workpiece 7b central workpiece 7c inner workpiece 8 upper jig base 9 inner Guide 10 Outer guide 11 Work guide 12 Lower jig base 13 Spring 14 Station shaft 15 Rotation shaft 16 Passage hole 17 Radial load 18 Bearing 19, 20 Welding line

Claims (5)

(57) [Claims] 1. A jig for an electron beam welding machine used when two different types of welded objects to be welded to each other are welded by two electron beams, wherein the jig is supported from below, and A lower jig that is driven to rotate, and an outer guide that presses an object to be welded arranged at the center of the objects to be welded from above, and rotates integrally with the lower jig and the object to be welded. A jig for an electron beam welding machine, comprising: an upper jig having an inner guide fixed to the outside; and a steel ball provided in a gap formed by the outer guide and the inner guide. 2. The steel balls are provided at least three in an annular shape equally distributed in an uneven joint portion on an upper portion of a gap formed by the outer guide and the inner guide, and are equally distributed in a lower portion of the gap. 2. The jig for an electron beam welding machine according to claim 1, wherein three or more annular rings and two or more sets of steel balls provided in the annular shape are provided vertically in a cylindrical shape. 3. The upper jig according to claim 1, wherein the upper jig has an upper jig base fixed to the outside and forming a passage hole larger than a beam interval between two electron beams. Jig for electron beam welding machine. 4. An annular welding line on the object to be welded on the outside of the outer guide and the inside of the inner guide, which presses the object to be welded arranged in the center, with the two electron beams. 2. The jig for an electron beam welding machine according to claim 1, wherein the jig is irradiated. 5. The lower jig base has a work guide that supports the workpiece and a lower jig base that is driven to rotate, and has a spring between the work guide and the lower jig base. The jig for an electron beam welding machine according to claim 1, wherein: