JPS5823584A - Electron beam welding device - Google Patents

Abstract

PURPOSE:To reduce the friction of a vacuum seal material, by making the vacuum seal material, which is arranged in the gap between a rotary table and an upper cover, eccentric from the rotating center of the rotary table in an electron beam welding device. CONSTITUTION:In the electron beam welding device consisting of a rotary table 2 having plural welding chambers 3-1-3-n where weldments 4 to be welded are stored, plural air discharge pipes 10-13, and an electron beam generating device 1, round vacuum seals 16-1 and 16-2 are provided for closing a leak gap 15 between the rotary table 2 and an upper cover 8 to hold airtightness. In this case, an eccentric quantity 17 is formed between the rotating center of the rotary table 2 and centers of seal materials 16-1 and 16-2. When the table 2 is rotated, the upper cover 8 and seal materials are not brought into contact with each other on the same contacting faces but are brought into contact with each other on faces twice as wide as the eccentric quantity, and therefore, the friction of contacting faces of both is smaller, and the leak from contacting faces is reduced considerably, thus performing stable electron beam welding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous differential pressure evacuation type electron beam welding apparatus, and particularly to a method of attaching a sealing material thereto.

Figure 1 is a perspective view of a conventional electron beam welding device;
1!1 is a plan view of the rotary table (2) shown in Figure 1. In these figures, a +13Fi electron beam generator is used to generate, accelerate and focus electron beams. (2) aO-tally table, (3) is Jin's four-
A plurality of welding chambers are installed on the same circumference of the tally cheaple (2), (4) is the work to be welded stored in this welding chamber (3), and (5) is the rotation main shaft of the rotary table (2). A rotational force is applied to the rotary table (2) through this rotational main shaft (5), and the rotary table (2) is rotated accordingly. (The drive device that transmits power to the rotating main shaft (5) is not shown.) (6) a The bearing ()) that holds the four-tally high pull (2) is mounted on the rotary table (2) in the welding chamber (3). ) with different circumference lengths to sandwich the opening.
Two vacuum sealing materials (-8) installed concentrically with the rotary table (2) are placed with a slight gap between them and the rotary table (2) through the vacuum sealing materials ()). The installed upper cover (9) is the welded object (
4) is taken out from the welding chamber (3), a workpiece loading/unloading port for storing the workpiece in the welding vehicle, 4-I is a group of exhaust pipes for exhausting differential pressure from the welding chamber (3), Q4) is an exhaust pipe for evacuating the electron beam generator (1);
(f) is a leak gap which is a slight gap between the rotary table (2) and the upper lid (8).

The conventional electron beam welding apparatus is configured as described above, and the workpiece (4) is installed in the Sm chamber (3) K located at the workpiece loading/unloading exit (9), and the workpiece (4) is mounted on the rotary table (2).
) rotates, the electron beam generator (1
) and welded. When the welding is completed, the exhaust pipes are conveyed through the exhaust pipe group α to the position of the workpiece carry-in/exit (9), indexed, and taken out of the welding* (3). Therefore, such operations are repeated one after another, the light is blocked, and the object to be welded (4) can be taken out, the mounting plate attached, and welded simultaneously. Because in this case, the air leak gap (1!
9 is a small gap between the four-tally cheaple (2) and the upper Mt8), and is limited to the direction parallel to the rotating feed direction between them by the vacuum sealing material (7), and the radial and radial directions are Since the vacuum sealing material (7), which is leaky, has a strong airtightness, the amount of leakage is very small and almost constant. Therefore, the welding chamber (3) transported under the electron beam generator (1) is evacuated to a predetermined degree of vacuum, and welding work is immediately performed on the workpiece (4).

However, the vacuum sealing material (7) was removed from the rotary table (
2) The vacuum □ sealing material (7) and the top cover (8) always slide on the same surface on the round ring installed concentrically with the rotation center. Therefore, during assembly, the thin film of vacuum grease, etc., which has both vacuum sealing and lubricity functions, applied to the surface of the vacuum sealing material (7) wears off, causing leaks from that part and damage to the vacuum sealing material. Next, welding room (3
), air will flow into the area, making it impossible to weld. In addition, as the vacuum sealing material (7) repeatedly slides in line contact with the same picture on the top (8), the sliding picture on the top cover (8) wears out, and the contact pressure is insufficient, causing air to escape from that area. The disadvantage was that it leaked and welding was impossible.

This invention eliminates the above-mentioned drawbacks of the conventional method, and the rotary table is arranged in a concentric manner in a continuous manner.
The object of the present invention is to obtain an electron beam welding device that can stably perform 9-pin contact without causing air leakage from the vacuum sealing material even when transferred. Examples will be omitted.

(161) and (16-2) are rotary tables (
Figure 4 shows a plan view of the rotary table (2), and (b) shows the vacuum seal installed eccentrically with respect to the rotation center of the rotary table (2). ) is the eccentricity of the center of 0. In the electron beam welding apparatus configured as described above, the vacuum sealing material r1e is attached to the center of rotation of the rotary table (2) with an eccentricity aη. The contact surface between the vacuum sealing material ae and the top cover (8) is not always the same 〇 contact surface, but the contact surface is twice the eccentricity 9, and the top cover (8)
) and the vacuum sealing material ae will have a very small amount of wear on the contact surface, and leakage from the contact surface due to wear will become dangerous. Further, the vacuum grease applied to the 111 surface of the vacuum seal material 4 during the rise does not wear out and always has both vacuum sealing and lubricity functions, so there is no leakage or damage to the vacuum seal material 4. This is because the vacuum sealing material (IQ K) 1m of vacuum grease is worn off to some extent on the contact surface with the upper cover (8), but it is worn off and the vacuum grease applied on the upper cover (8)
Another surface of the vacuum sealing material ae comes into contact with the groove that adheres to the bottom surface of the vacuum sealing material OQ, and the worn-out vacuum grease adheres to the surface of the vacuum sealing material OQ. Occurs continuously throughout the cycle. Due to its roundness, the sliding resistance is constant and stable operation can be achieved even under low loads.

In the above explanation, continuous differential pressure pumping type electron beam S*
Although the case where it is used for the vacuum seal of a machine has been described, it goes without saying that it can also be used for other differential pressure exhaust type vacuum seals.

This invention has a simple structure in which the vacuum seal material is attached eccentrically to the rotation center of the rotary table as described above, thereby preventing air leakage from the vacuum seal and damage to the vacuum seal material, and preventing rotational loads. This has the effect of reducing rotational load and keeping the rotational load constant.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional electron beam welding device, Figure 2 is a plan view of the rotary table shown in Figure 1, and Figure 3 is a perspective view of a conventional electron beam welding device.
The figure is a perspective view showing one embodiment of the present invention, and a plan view of the rotary table shown in the line of FIG. 4 and FIG. In the figure, (1) is an electron beam generator, (2) is a rotary table, (3-1) to (5-n) are WI contact rooms, (16-1), (16-2) Hiro vacuum sealing material , (8
) is the upper lid, αQ to a4 are the exhaust pipes, and aη is the amount of eccentricity. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Makoto Torino - Figure 2 Procedural Amendment (Voluntary) Commissioner of the Japan Patent Office 1, Indication of the case Patent Application No. 56-125679 2, Name of the invention Electron beam coupling device 3, Person making the amendment Relationship to the case Patent applicant representative Hitoshi Katayama Department 4, agent address 2-2-3-5 Marunouchi, Chiyoda-ku, Tokyo, "Detailed description of the invention" column of the specification subject to amendment. 6. Contents of the amendment 1) "At the exhaust pipe group aI-aυ" on page 5, line 10 of the specification was changed to "at the bottom of the exhaust pipe group 01-(II)"
and correct it. 2) "Exhaust pipe group aS, (passing through IS)" on page 3, line 13 of the specification has been changed to "passing through the lower part of exhaust pipe group as, as."
and correct it. 6) "Vacuum seal" in lines 9 and 10 on page 5 of the specification is corrected to "vacuum seal material." 4) [Vacuum sealing material (7y
1 will be corrected to "vacuum sealing material member". that's all

Claims (1)

[Claims] A rotary table in which a plurality of welding chambers for storing objects to be welded are provided on the same circumference and can be rotated and fed out intermittently;
Two ring-shaped vacuum sealing materials with different diameters are attached to sandwich the I-port, and the rotary table is placed opposite to the rotary table with a slight gap between the vacuum sealing materials and the rotary table. an upper lid; an exhaust pipe group disposed on the upper lid to face the welding chamber for evacuating the welding chamber; and an electron beam generator; An electron beam welding device characterized by being attached.