JPS5823184B2 - How to use it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding method for welding a spherical alloy to a workpiece.

Conventional welding methods utilize discharge heat or electrical resistance heat as a welding source, and therefore have the disadvantage that current must be applied directly to the welded material, which tends to cause sparking phenomena and poor contact.

In welding using electrical resistance heat, welding is often impossible due to poor contact between the material to be welded and the electrode, and even if welding is not impossible, problems occur with the weld shape and weld strength.

Welding that uses discharge heat can only be used for nib alloys with a relatively low melting point because it is difficult to adjust the temperature, and the shape of the welded part is not constant, which poses a major problem in the subsequent processing of the welded material.

In particular, when using active metals such as stainless steel, titanium, titanium alloys, tantalum, and tanker alloys as materials to be welded, it is necessary to prevent the welded part from coming into contact with the atmosphere and reacting as much as possible during welding. Even if we ignore workability during welding to some extent and use flux or brazing filler metal, or incorporate gas shielding, it is difficult to completely isolate the material to be welded from the outside air due to the direct energization method. Therefore, it is difficult to obtain a product whose welded portion has sufficient strength for practical use.

The present inventor has completed the present invention as a result of continuing studies to solve these conventional problems.

The invention is characterized by the use of a high energy density light beam heat source, for example a xenon arc lamp, as the welding heat source.

This method, which uses a welding heat source to irradiate a light beam, does not require electricity to be applied directly to the material to be welded, so the problems of sparks and welding defects that occur in conventional welding naturally do not occur, and work efficiency is further improved and automation is possible. has become easier.

Furthermore, since it is not a direct energization method, the material to be welded can be easily isolated from the outside air when energized, so it is possible to firmly weld spherical alloys when active metals such as stainless steel, titanium, tantalum, etc. are used as the material to be welded. Became.

In the present invention, by appropriately moving the focal position of the light beam from the welding heat source, it is possible to heat only the areas that require welding, resulting in less oxidation of the weld, improved yield, and a strong weld with a uniform shape. It has become easier to obtain products with

In particular, brazing has become much easier to weld, and in this case too, it has become easier to obtain products with good weld strength.

However, the light beam from the welding light source irradiates the welding area with high energy in a short period of time, so the area around the welding area is instantaneously heated to a high temperature.
It is necessary to weld the filler metals to each other under moderate pressure before welding, but for the reason mentioned above, if this pressure is too large, the welded shape will instantly collapse and the appearance of the material to be welded will be significantly affected. This will result in a loss.

Also, if the pressure is too low, it is difficult to expect high welding strength.

The inventor's experiments have shown that the appropriate pressure for welding the material to be welded, a spherical alloy, and a brazing filler metal is in a very small range, and that the pressure cannot be reduced by applying a constant pressure using a spring as in conventional welding. Control proved extremely difficult.

Furthermore, it has been found that a good shape and strong welding strength can be obtained by irradiating the weld with a light beam under low pressure to allow natural melt penetration with good coverage.

Therefore, in the present invention, a spherical alloy (a brazing material may be attached to the outer surface of the spherical alloy in advance).

same as below. ), or by utilizing the weight of the spherical alloy and brazing filler metal, and applying the weight to the welding area of the material to be welded before irradiating the light beam.

In the present invention, when a spherical alloy, or a spherical alloy and brazing filler metal is placed above the groove in an inclined groove provided in the table in order to apply the above-mentioned own weight to the welding part of the welded material, rolling force is applied to this. This is achieved by rolling from above the groove and colliding with the welded part of the material to be welded, which has been fixed in advance below the groove, and being lightly pressed.

Thereafter, when the light beam is irradiated, welding progresses while the material to be welded is always under constant pressure between the spherical alloy or the spherical alloy and brazing metal, resulting in a product with consistent and strong welding strength.

In particular, when welding using a filler metal, the filler metal melted by the light beam draws the spherical alloy with its surface tension, and at the same time, the pressure exerted by the slope angle of the groove causes the filler metal to evenly weld the welded part of the workpiece. This makes it possible to weld very strongly spherical alloys using brazing filler metal, even for materials to be welded using active metals, which conventionally had weak welding strength and could not be put to practical use. The effect is extremely strong.

The welding light source used in the present invention is one that can provide a light beam having an energy density of 1000 joules or more per 1 d.

The table with inclined grooves used in the present invention should be stable at temperatures of at least 1000°C or higher because it will not melt, expand, break, wear out, or adhere to the material to be welded by light beam irradiation. For this purpose, metal materials, glassy carbon, ceramics, etc., which themselves have heat resistance, or various materials with a water cooling mechanism are used.

The slanted groove provided on the stand must be able to roll the spherical alloy or brazing filler metal without spilling out, and must have dimensions that match the width and thickness of the welded part of the material to be welded. When applying to a pen body, the width is 0.7 to 1.2
A groove with a depth of about 0.7 to 1.2 mm is preferable, but it can be changed depending on the type and size of the pen body that is the material to be welded and the nib alloy that is a spherical alloy.

The angle of inclination of the groove varies depending on the required spherical alloy and the weight of the filler metal, but in general, the larger the sphere, the smaller the angle of inclination is. Although the optimum angle of inclination varies depending on the surface roughness of the surface, it is set at an appropriate angle within the range of 5 to 90 degrees.

Next, the present invention will be explained in detail.

Example 1 In this example, the apparatus shown in FIG. 1 is used.

Made of osmium, iridium, and platinum, the diameter is 0.
A spherical pen tip alloy 1 of 8 mm is placed in a hopper 3 provided on a rotating plate 2.

The pen body 6 is horizontally fixed with a fixture 7 so that the tip of the 18-karat gold pen body 6 is positioned below a groove 5 with a width of 1 mm, a depth of 1 mm, and an inclination angle of 15 degrees provided on the stand 4.

The position of the pen body 6 is adjusted on the adjustment table 10 so that the focus of the light beam 9 emitted from the xenon lamp light beam generator 8 hits near the tip of the pen body 6.

Rotate the rotary plate 2, drop one nib alloy 1 into the hole 12 provided in the fixed plate 11, lead it to the groove 5 through the supply pipe 13, roll the nib alloy 1 below the groove 5, and complete the pen. It is brought into contact with the toe of the body 6.

When the tip of the pen body 6 is melted by irradiating the light beam 9 at 1000 to 1200°C for 0.9 seconds, the molten part attracts the pen tip alloy 1 and welds it in a way that wraps it, creating a strong weld. A strong 18-karat gold pen was obtained.

Example 2 The diameter of the pen tip alloy 1 is 0.7 mvt, the width of the groove 5 of the base 4 is 0
．． A 14-karat gold pen with strong welding strength was obtained in the same manner as in Example 1 except that the pen was 9 mm, the depth was 0.9 urn, and the inclination angle was 2.5 degrees.

Example 3 In this example, the apparatus shown in FIG. 2 is used.

A spherical pen nib alloy 1 with a diameter of 0.6 mm made of osmium, iridium, palladium, nickel, and platinum is put into a hopper 3 provided on a rotating plate 2.

Width 0.8 mrrt, depth 0.8 mm provided on table 4,
Stainless steel (SUS316
JIL) The pen body 6 is tilted 15 degrees and fixed with a fixture 7 so that the tip of the pen body 6 is located.

The pen body 6 is sealed with a gas shield box 16 having a gas intake port 14 and a gas discharge port 15.

The position of the pen body 6 is adjusted on the adjustment table 10 so that the focus of the light beam 9 emitted from the xenon lamp light beam generator 8 hits near the tip of the pen body 6.

Argon gas of 101/min flows into the gas shield box 16 from the gas intake port 14 to fill it, and then the gas discharge port 15 is filled with argon gas.
Make it more discharged.

The rotary plate 2 is rotated, and one pen tip alloy 1 is introduced into the groove 5 through the hole 12 of the fixed plate 11 and the supply pipe 13, and is caused to roll down the groove 5 and collide with the tip of the pen body 6.

When the tip of the pen body 6 is melted by irradiating the light beam 9 at 1700 to 1900°C for 1.2 seconds, the molten part attracts the pen tip alloy 1 and welds it in a way that wraps it, creating strong welding strength. I got a stainless steel pen.

Example 4 In this embodiment, the apparatus shown in FIG. 3 is used.

A spherical nib alloy 1 with a diameter of 0.8 mm made of osmium, iridium, ruthenium, and platinum is placed in a hopper 3 provided on a rotary plate 2, and a spherical gold nib with a diameter of 0.8 mm made of gold, silver, copper, and zinc is placed. Put wax 17 into hopper 3.

The pure titanium pen body 6 is horizontally fixed with a fixture 7 so that the tip of the pure titanium pen body 6 is located below a groove 5 with a width of 1 mm, a depth of 1 mm, and an inclination angle of 20 degrees provided on the stand 4.

The pen body 6 is attached to the gas shield box 16 in the same way as in Example 3.
Seal it tightly.

The position of the pen body 6 is adjusted on the adjustment table 10 so that the focal point of the light beam emitted from the xenon lamp light beam generator hits a position 0.4 mm in front of the tip of the pen body 6.

Argon gas at 151/min is introduced into the gas shield box 16 and discharged as in the third embodiment.

Rotate the rotary plate 2 and insert one gold solder 17 into the hole of the fixing plate 11,
The supply pipe 13 is guided into the groove 5, rolled under the groove 5 so as to collide with the tip of the pen body 6, and then the rotary plate 2 is rotated to form one nib alloy 1 in the same manner as the gold solder 17. The gold solder 17 contacts the tip of the pen body 6, and the pen tip alloy 1 contacts each other with the gold solder 17 pressed.

When irradiated with a light beam 9 at 1000 to 1200°C for 0.9 seconds, the gold solder 17 melts and strongly draws the pen tip alloy 1, and at the same time wraps around and welds the tip of the pen body 6, creating a titanium pen with strong welding strength. I got it.

Example 5 Pen nib alloy 1 was made of rhenium, ruthenium, tantalum, and boron, diameter 17ft11L1, pen body 6 was made of pure titanium,
The width of the groove 5 of the stand 4 is 1.2 mm, the depth is 12 mm, and the inclination angle is 10 mm.
A titanium pen with strong welding strength was obtained in the same manner as in Example 3 except that the welding strength was increased.

The present invention is an excellent method for efficiently manufacturing products with strong welding strength, and can manufacture not only fountain pens but also dot pens, pipe pens, and printing parts for various printing and recording devices.

[Brief explanation of drawings]

1 to 3 are front views of apparatuses implementing the present invention, respectively. 1... Nib alloy, 4... Stand, 5...
...Groove of stand; 6...Pen body, 8...
・Light beam generator. 17... Gold wax.

Claims (1)

[Claims] 1. The workpiece to be welded is fixed to a table capable of fixing the workpiece by locating the welding part under the inclined groove and the groove, and the spherical alloy placed in the groove is directly or the spherical brazing filler metal is placed in the workpiece. By applying a self-weight to the welding part through the welding part and irradiating the welding material with a light beam capable of melting the welding material and/or the brazing material,
A welding method that welds a spherical alloy to the workpiece.