JPH0215885A - Electron beam machine - Google Patents

Abstract

PURPOSE:To accurately and easily control the irradiation position of electron beams by on/off-controlling an electron beam generator by a sequence controller based on rotation position information and irradiation position information of electron beams which has been inputted in advance. CONSTITUTION:A CPU 12a compares the rotary position read by.a high speed pulse counter unit 1 3d with the irradiation position of an electron beam B preset in advance by a daisy switch 12b. When they agree with each other, an electron beam on/off signal SS6 is outputted to an electron beam generator 1. The electron beam generator 1 irradiates electron beams B to a work to be welded to conduct a skip welding. During this skip welding, an AC servo motor controller 11A controls the speed of rotation of the AC servo motor 7A based on a rotary position signal SS4. When the CPU 12a detects the termination position of welding, signals SS1 and SS2 are outputted to the power source on/off contactor 10 and controller 11A to stop the operation of the controller 11A.

Description

Detailed Description of the Invention [Industrial Field of Application] This invention performs welding by turning the electron beam ON/OFF at arbitrary positions several times during one revolution of the welding work (hereinafter referred to as "skip welding"). '') between electron beam processing equipment.

[Conventional technology] The configuration of a conventional example will be explained with reference to FIG.

FIG. 4 is a partial block diagram of a conventional electron beam processing apparatus.

In Figure 4, (1) is an electron beam generator, (2)
represents a welding work placed under this electron beam generator (1), (3), (4), (5) and (6) constitute a rotation transmission mechanism, and in this conventional example, (3) A rotary table on which this welding workpiece (2) is placed, (4) a rotary shaft connected to this rotary table (3), (5) a clutch device connected to this rotary shaft (,4), (6 ) is a speed reducer coupled to this clutch device (5).

Further, (7) is a DC servo motor coupled to the reducer (6), (8) is a tacho generator for rotational speed detection coupled to this DC servo motor (7), (9) is a power source, (
10) is the ON/OFF power supply connected to this power supply (9)
Contactor for F, (11) is DC4J-BO motor (7)
, Turn on the tacho generator (8) for rotational speed detection and power on.
10F DC servo motor controller connected to contactor (10), (12) is power supply 0N10F
This is a sequence controller connected to an F contactor (10) and a DC servo motor controller (11).

Further, (13) is a rotational position detection dog provided on the rotational shaft (4), and (14) is a rotational position detection LS (consisting of a large number of limit switches) coupled to this rotational position detection dog (5). ), (15) is an electron beam ON10 F F control circuit connected to the sequence controller (12) and rotational position detection LS (14), (16
) has an electron beam ON10 FF control circuit (1
5) and the output side is an electron beam generator (1)
This is the Kiban circuit connected to the

Note that, for example, if the rotary table (3) has a groove and the welding workpiece (2) can be positioned in the groove, the welding workpiece (2) is of the same type.

The welding workpiece (2) and the rotary table (3) have a mechanical structure in which the positional relationship is constant.

Next, the operation of the above-mentioned conventional example will be explained with reference to FIG. FIG. 5 is an explanatory diagram showing the ON/OFF state of the electron beam B emitted from the electron beam generator (1).

First, before starting skip welding, a welding workpiece (2) is carried into a welding chamber, and the welding chamber is evacuated by a vacuum pump (not shown).

After this, the sequence controller (12) turns on the power.
10 FF Rotation ON/OFF signal S1 is sent to the F contactor (10) and DC servo motor controller (11).
Outputs the rotation speed signal S2 and turns the power ON/OFF.
Close the connector (10) and start the operation of the DC servo motor controller (11).

The DC servo motor controller (11) outputs a DC servo motor rotation signal S3 to the DC servo motor (7) to rotate it.

The DC servo motor (7) drives the rotary table (3) via a reducer (6), a clutch device (5) and a rotary shaft (4).
).

At the same time, the sequence controller (12) outputs a welding start signal S4 to the electron beam ON/OFF control circuit (15).

Rotational position detection dog (13) and rotational position detection LS
(14) detects the irradiation position of the electron beam B generated by the electron beam generator (1) on the welding workpiece (2), and outputs a rotational position signal S5 to the electron beam ON/OFF control circuit (15). .

The electron beam ON/OFF control circuit (15) sends an electron beam ON/OFF signal S to the electron beam generator (1) via the Kiban circuit (16) based on the rotational position signal S5.
Outputs 6.

The electron beam generator (1) turns the electron beam ON/OFF.
Based on the signal S6, as shown in FIG. 5, the welding workpiece (2) is irradiated with the electron beam B to perform skip welding.

That is, in FIG. 5, the rotational position detection LS (1
For example, when the first limit switch of 4) is turned on, irradiation of the electron beam B is started at position A, and after a certain period of time has elapsed, irradiation of the electron beam B is stopped at position B1. Similarly, when the Nth limit switch is turned on,
Irradiation of the electron beam B is started at a position An, and is stopped at a position Bn after a certain period of time has elapsed.

During this skip welding, the DC servo motor controller (
11) controls the rotation speed of the DC servo motor (7) based on the rotation speed signal S7 detected by the rotation speed detection tachogenerator (8).

The electron beam ON/OFF control circuit (15) includes a rotational position detection dog (13) and a rotational position detection L S (14).
) detects the welding end position, it outputs a welding end signal S8 to the sequence controller (12).

The sequence controller (12) outputs a welding end signal S8.
When you receive the power supply 0N10F'F contactor (10
) and the DC servo motor controller (11), output the rotation ON/OFF signal S1 and the rotation speed control signal S2, turn on the power, open the FF contactor (10), and stop the operation of the DC servo motor controller (11). let In this way, the rotation of the rotary table (3) is stopped, and the skip welding is completed.

[Problems to be Solved by the Invention] The conventional electron beam processing apparatus as described above has the following problems.

(a) Numerous mechanisms such as a dog for detecting the position of one rotation, an LS for detecting the rotational position, and an electron beam ON10 F F control circuit,
A circuit was needed.

(a) The setting of the 0-rotation position detection dog must be adjusted for each welding workpiece, and if the -degree setting adjustment is made, it becomes exclusive to one type of welding workpiece, so it is versatile for other types of welding workpieces. There was no.

(1) In order to provide versatility, if skip welding is performed using preset values input into the sequence controller in advance, variations in the irradiation position of the electron beam B due to the influence of the sequencer scan time will cause practical problems. This is almost 2 to 3 times the allowable value for skip welding.

This invention was made to solve the above-mentioned problems, and provides an electron beam processing device that can accurately and easily control the irradiation position of the electron beam B and can perform skip welding of many types of welding workpieces. The purpose is to

[Means for Solving the Problems] An electron beam processing apparatus according to the present invention includes the following means.

(a) An electron beam generator that irradiates the welding workpiece with an electron beam.

(a) A rotation transmission mechanism that rotates with the above-mentioned welding work placed thereon.

(1) A motor that rotationally drives this rotation transmission mechanism.

(Engineering), Rotational position detection mechanism that detects the rotational position of the motor and outputs rotational position information.

(E) A motor controller that controls the speed of the motor based on the rotational position information.

(force), a sequence controller that controls ON/OFF of the electron beam generator based on the rotational position information and electron beam irradiation position information inputted in advance.

[Operation] In the present invention, the rotational position detection mechanism indirectly detects the rotational position of the welding workpiece, and outputs the rotational position information.

Then, the sequence controller performs ON/OFF control of the electron beam generator based on the rotational position information and electron beam irradiation position information inputted in advance.

[Example] The configuration of the embodiment will be explained with reference to FIG.

FIG. 1 is a block diagram showing a partial block diagram of an embodiment of the present invention. are the same.

In FIG. 1, (7^) constitutes a motor, (8^) constitutes a rotational position detection mechanism, and (9), (10) and 11^) constitute a motor controller.

In this example, (7^) is an AC servo motor coupled to the reducer (6), (8^) is this AC servo motor (
)^) A pulse encoder for detecting rotational position coupled to
(11^) is an AC servo motor controller connected to an AC servo motor (7^), a pulse encoder for rotational position detection (8^), and a power ON/OFF contactor (10).

Also, (12^) is a sequence controller,
The main ones are (12a), (12b), (12c)
, (12d) and (12e), and (1
2m) is the CPU, (12b) is the CPU (12a
), the input side of the digital switch (12c) is connected to the CPU (12m), and the output side is turned on.
10 FF contactor and output crab unit (12d) connected to AC servo motor controller (11^)
), the input side is an AC servo motor controller (11^)
(12e) is a high-speed pulse counter unit whose input side is connected to the CPU (1'2a) and whose output side is connected to the Kiban circuit (16). be.

Next, the operation of the above embodiment will be explained with reference to FIGS. 2 and 3. Figure 2 shows the electron beam generator (1
) is an explanatory diagram showing the 0N10 FF state of the electron beam B emitted from the electron beam B, and FIG. 3 is a flowchart diagram showing the operation of the CPU (12a).

First, an outline of the operation of the CPU (12a) will be explained.

In step (30), the CPU (12a)
Start operation.

In step (31), CPU (L2a)
Run the main program. This main program is, for example, a vacuum pump, an AC servo motor controller (
11^) etc.

In step (32), the CPU (12a)
Determine whether the scan time has elapsed by loms.

If the time has elapsed (YES), proceed to the next step (33).

If the time has not elapsed (NO), return to step (31).

In step (33), CPU (12a) executes the interrupt program. This interrupt program is
Processes ON/OFF control of the electron beam generator (1).

In step (34), the CPU (12a)
Determine whether skip welding is finished. If completed (YES), proceed to the next step (35); if not completed (No), return to step <31).

Next, the detailed operation of the entire sequence controller (12^) will be explained.

As in the conventional example, before starting skip welding, a welding workpiece (2) is placed in a welding chamber, and the welding chamber is evacuated by a vacuum pump (not shown).

After this, the CPU (12a) executes the output (12)
c), power ON10 F F contactor (1
0) and AC servo motor controller (11^),
Rotation 0N10 FF Outputs the F signal SSI and the rotation speed control signal S82, and connects the power ON/OFF contactor (10
) and start the operation of the AC servo motor controller <11^).

The AC servo motor controller (11^) outputs an AC servo motor rotation signal S83 to the AC servo motor (7Δ) to rotate it. .

The AC servo motor (7^) is connected to the rotary table (
3) Rotate.

When the AC servo motor (7^) rotates, the rotational position detection pulse encoder (8^) outputs the rotational position signal SS.
4 is output to the AC servo motor controller (118), which converts the rotational position signal SS4 into a pulse signal SS5 and outputs it to the high speed pulse counter unit (12d).

The CPU (12a) uses the rotational position pulse signal S S ,5) read by the high-speed pulse counter unit (12d) and the irradiation position of the electron beam B (a plurality of electron beams) preset by the digital switch (12b). Beam ON, OF, F position) and if they match, the output circuit (12e) and Kiban circuit (16
) to the electron beam generator (1).
/OFF signal SS6 is output. Note that this part is the processing of the interrupt program.

The electron beam generator (1) turns the electron beam ON/OFF.
Based on the signal SS6, as shown in FIG. 2, the welding workpiece (2) is irradiated with the electron beam B to perform skip welding.

That is, in FIG. 2, when the irradiation position of the electron beam B coincides with the first ONN position pulse signal SS5 among the preset irradiation positions of the electron beam B, the irradiation of the electron beam B is started at the position CI, and the position is changed after a certain period of time has elapsed. , the irradiation of the electron beam B is stopped. Similarly, when the Nth ON position coincides with the pulse signal SS5, irradiation of the electron beam B is started at the position Cn, and after a certain period of time has elapsed, the irradiation of the electron beam B is stopped at the position Dn.

During this skip welding, the AC servo motor controller (
11^) is a pulse encoder for rotational position detection (8^)
Based on the rotational position signal SS4 detected by A
Controls the rotation speed of the C servo motor ()^).

When the CPU (12a) detects the welding end position,
Power ON 10F via output unit (12c)
Output the rotation ON10 F F signal SSI and rotation speed control signal SS2 to the F contactor (10) and AC servo motor controller (11^), and turn the power ON/OFF.
Open the contactor (10) and stop the operation of the AC servo motor controller (11^). In this way, the rotation of the rotary table (3) is stopped, and the skip welding is completed.

The above-mentioned embodiment uses a CPU (12a) that can handle interrupts.
Since we adopted an electron beam generator (1
) can be controlled ON/OFF, and the variation in the irradiation position of electron beam B can be reduced to 1/3 to 1 of the practical skip welding tolerance.
/4 or less.

[Effects of the Invention] As described above, the present invention includes an electron beam generator that irradiates an electron beam onto a welding work, a rotation transmission mechanism that rotates with the welding work placed thereon, and a rotation transmission mechanism that rotates the rotation transmission mechanism. a motor that detects the rotational position of the motor and outputs rotational position information; a motor controller that controls the speed of the motor based on the rotational position information; The irradiation position information of the electron beam B is equipped with a sequence controller that performs ON10F F control of the electron beam generator based on the information on the irradiation position of the electron beam B, so the irradiation position of the electron beam B can be accurately and easily controlled, and it can be used with a wide variety of This has the effect of allowing skip welding of welding workpieces.

[Brief explanation of the drawing]

FIG. 1 is a partial block diagram of an embodiment of the present invention, and FIG. 2 is an electron beam generator according to an embodiment of the present invention. FIG. 3 is an explanatory diagram showing the ON/OFF state of the electron beam emitted from the CPU according to an embodiment of the present invention.
FIG. 4 is a block diagram showing a partial block diagram of a conventional electron beam processing device, and FIG. 5 is a flowchart showing the operation of the electron beam processing device. It is an explanatory diagram showing an ON/OFF state. In the figure, (1) ... electron beam generator, (2) ...
Welding workpiece, (3) ... rotating table, (4) ... rotary shaft, (5) ... clutch device, (6) ... reducer, (7^) ... AC servo motor, (8＾) ・・
・ Pulse encoder for rotational position detection, <9) (11^) (12^) In addition, ... power supply, ... power ON10 FF contactor, ...
AC servo motor controller... is a sequence controller. The same reference numerals in each figure indicate the same or corresponding parts.
16th of the month

Claims (1)

[Claims] An electron beam generator that irradiates the welding work with an electron beam, a rotation transmission mechanism that rotates with the welding work placed thereon, a motor that rotationally drives this rotation transmission mechanism, and a rotation that detects the rotational position of this motor and outputs rotational position information. a position detection mechanism, a motor controller that controls the speed of the motor based on the rotational position information, and a motor controller that turns on/off the electron beam generator based on the rotational position information and electron beam irradiation position information input in advance. An electron beam processing device characterized by comprising a sequence controller that performs OFF control.