JP3066706B2 - Electron beam welding equipment for continuous strip processing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stream for welding a joint of a material to be welded locally in a vacuum chamber and welding with an electron beam.
The present invention relates to an electron beam welding equipment for continuous processing.

[0002]

2. Description of the Related Art Conventional electron beam welding is a general vacuum method in which the entire material to be welded is placed in a rigid vacuum chamber and welded. Therefore, it is suitable for welding small workpieces,
In the case of a large welded material, a huge vacuum chamber is required, so that equipment costs and maintenance costs become enormous. Further, when welding is required to be completed in a short time, a large-capacity exhaust system is required, and there is a problem in practical use thereof.

[0003] In the electron beam welding method, squid the welding line portion
The problem is how to maintain the vacuum. The analysis of this problem is as follows. (1) To properly arrange a seal between two workpieces having different thicknesses and a vacuum chamber, and a clamp for restraining thermal deformation of the workpiece by welding. (2) A reliable seal between two workpieces having different plate widths and a vacuum chamber.

To solve the problem (1), Japanese Patent Laid-Open Publication No.
Countermeasures such as 6246 or Japanese Patent Application Laid-Open No. 50-143743 are known. To cope with the problem (2), there is a countermeasure disclosed in JP-A-50-117654 for the same plate width. To cope with the two problems (1) and (2), there are countermeasures described in Japanese Patent Application Laid-Open Nos. 52-23543 and 03-013279.

[0005]

In the case where electron beam welding is applied to a continuous processing line for a material to be welded, there are the above two problems, and there are the above countermeasures for these problems. To solve the problem (1), refer to Japanese Patent Laid-Open No. 50-136.
No. 246, the lower chamber is tilted.
In Japanese Patent No. 3743, a sealing material is pressed against a material to be welded by a bellows. This allows sealing between the different workpieces and the vacuum chamber of the plate thickness. However, in these configurations, when a clamp for preventing thermal deformation of the material to be welded is arranged, the clamp is arranged at a position distant from the welding line, so that thermal deformation of the material to be welded is allowed to some extent. , Precision welding is not possible.

[0006] (2) the problem is the sealing between the different workpieces and true <br/> air chamber of the plate width. JP-A-50-117
In No. 654, a U-shaped sealing tab is pressed against the width end of the material to be welded on the material to be welded having the same plate width . However, this can not seal the space between the different workpieces and the vacuum chamber of the plate width.

As a method for solving both the problems (1) and (2), Japanese Unexamined Patent Publication (Kokai) No. 52-23543 discloses a method in which a material to be welded is sandwiched between elastic sealing material packings and wedges are formed at plate ends. Press the packing . In the case of this method, it is necessary to prepare several kinds of wedge-shaped packings having different thicknesses and to use a packing suitable for the thickness of the material to be welded. In addition, JP
In Japanese Patent No. 3-013279, a material to be welded is sandwiched between elastic sealing material packings, and a plate-shaped packing is pressed against a plate end .
Also in the case of this method, it is necessary to arrange several types of plate-like packings having different thicknesses, and to use a plate-like packing having a thickness suitable for the material to be welded. In any of these methods, a sealing material suitable for the thickness of the material to be welded must be pressed against the end of the plate, so that the vacuum operation becomes complicated and is not practical.

A first object of the present invention is to provide a sufficient seal between two workpieces having different thicknesses and widths and a vacuum welding chamber.
It is an object of the present invention to provide an electron beam welding equipment for continuous processing of a strip provided with a cutting means .

A second object of the present invention is to provide an electron beam welding equipment for strip continuous processing provided with means capable of securely clamping a material to be welded in the vicinity of a welding line when two materials having different thicknesses are sealed. To provide.

[0010]

According to the present invention, in order to achieve the first object, in a continuous strip processing line of a rolling mill, a butt portion between a rear end of a preceding strip and a front end of a succeeding strip is formed. An electron beam welding equipment for continuous strip processing to be connected by welding by an electron beam ,
At least one pre-exhaust chamber extending along the weld line so as to surround the periphery of the weld portion of the two strips and having a width and a longitudinal direction around the weld line is provided, and an elastic seal is provided between the pre-exhaust chambers.
Vacuum after being configured to open the lower mounting the sealing material
The container and the upper vacuum container are symmetrically installed with at least one preliminary exhaust chamber in the width and longitudinal direction around the welding line.
A vacuum welding chamber consisting of a lower vacuum vessel with an upper part opened by attaching an elastic sealing material between the exhaust chambers; first actuator means for pressing the upper vacuum vessel toward one surface of the two strips during welding; A second actuator means for pressing the lower vacuum vessel toward the other surface of the two strips, and the first and second actuator means for butt-welding the two vacuum strips to the upper vacuum vessel and the lower vacuum vessel. and an evacuation means for forming a vacuum region around the gas flowing from the plate edge gap portion which is formed when sandwiched between the container and suction from at least one of the preliminary exhaust chamber weld auxiliary vacuum chamber The strip
Strips arranged more in the longitudinal direction than in the plate width direction
We propose an electron beam welding facility for continuous processing.

The evacuating means evacuates a minute gap formed between the vacuum welding chamber and the preliminary vacuum chamber. More specifically, the evacuating means evacuates the elastic sealing material, adsorbs it at the installation location of each vacuum vessel, and fixes it. This elastic sealing material is formed in a sheet shape.

According to the present invention, in order to achieve the second object, there is provided an electronic beam for continuous strip processing according to any one of the above.
In a vacuum welding facility, a part of a vacuum welding chamber extending along the welding line so as to surround the periphery of the weld between the two strips has a clamp pressed against the strip at the welding line, and a position detecting function. The third is installed in the upper vacuum vessel outside the vacuum welding chamber via the bellows and presses the clamp.
The present invention proposes an electron beam welding equipment for continuous strip processing, comprising: actuator means of (1), and fourth actuator means which is installed in a lower vacuum vessel outside the vacuum welding chamber via a bellows and presses a clamp.

[0013]

In the present invention, in order to sufficiently seal between the two strips having different thicknesses and widths and the vacuum welding chamber , at least the upper and lower vacuum welding chambers and their surroundings are provided in the longitudinal direction more than the sheet width direction. An elastic sealing material is provided on one preliminary exhaust chamber and the lower surface between them, and at the time of butt welding, some gas flows in from the plate end gap formed when the strip is sandwiched between the upper vacuum container and the lower vacuum container. of Runode be sucked by the preliminary exhaust chamber, the degree of vacuum in the vacuum welding chamber can be maintained.

When two strips having different plate thicknesses are sealed, one of the two strips is clamped by the third and fourth actuators in the upper vacuum chamber and the lower vacuum in order to securely clamp the strips immediately near the welding line. Since the strip is clamped in the room and the other side of the strip is clamped by the first and second actuators, the material can be reliably clamped immediately near the welding line. The third actuator is controlled by using the position detection function, and the clamp is fixed to a position corresponding to the abutting position before clamping the strip, and the strip is pressed by the fourth actuator. The butting position can be set arbitrarily.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
An embodiment of the electron beam welding equipment for continuous strip processing will be described.

In an electron beam welding equipment for continuous strip processing, a butt portion between a trailing end of a preceding strip and a leading end of a following strip is welded and connected by an electron beam.
Preliminary exhaust chambers 6 are provided on both sides of the strips 1 and 2 in the width direction.
The pre-evacuation chambers 7, 8, and 9 are provided at certain intervals on both sides in the longitudinal direction . On each underside
Is a sheet-like elastic sealing member 10 hollowed part so as not to block the respective vacuum chambers mounted, true on opening the lower
There is an empty container 3. Shimoshin which opened the upper part symmetrically to this
An empty container 4 is arranged. These upper vacuum container 3 and lower truth
The empty container 4 forms a vacuum welding chamber 5 and preliminary exhaust chambers 6 , 7 , 8 , 9 extending along the welding line so as to surround the periphery of the butt weld of the strips 1, 2 . An electron gun chamber 35 and an electron gun 36 that moves in the same direction as the welding line are provided on the upper part of the upper vacuum vessel 3 along the welding line.

The vacuum welding chamber 5 and the preliminary exhaust chambers 6, 7, 8, 9
Are the vacuum valves 15,
16 , 17 , 18 , 19 , 20 , 21, 22 , 23 and vacuum pumps 24, 25,
26 and 27 and evacuated.

The elastic sealing member 10 'of the elastic sealing member 10 and the lower vacuum chamber above the vacuum vessel, a bypass pipe 28 both drawn from between the vacuum valve and the vacuum pump thereof <br/> elastic sealing member By arranging them at the installation locations of 10, 10 ', they are fixed by vacuum suction.

Next, the strip 1 is fixed by the actuators 12 and 11, and the strip 2 is fixed by the actuators 13 and 14.

The actuator 12 has a position detecting function and presses the lower vacuum container 4 against the strips 1 and 2. One end of the actuator 11 is fixed to the frame 40, and the height of the contact portion between the lower vacuum container 4 and the strip 1 is made lower than that of the upper surface of the elastic sealing material 10 in the non-compressed state in consideration of the compression limit. The contact surface is referred to as a reference surface 30, and the upper vacuum container 3 is directed toward the other surface of the strips 1 and 2 between the reference surface 30 and the clamp surface 29 provided on the upper vacuum container 3 symmetrically with respect to the actuator 12. Press with a small force to fix the strip 1.

The actuator 13 is installed on the upper surface of the upper vacuum vessel 3 via a bellows 33 and has a position detecting function. The actuator 13 has a reference plane 31 serving as a reference plane of the strip 2 in the vacuum welding chamber 5 of the upper vacuum vessel 3. The clamp 50 is positioned at a position symmetrical to the reference plane 30 and positioned. Actuator 14
Is mounted on the lower surface of the lower vacuum container 4 via the bellows 34, and fixes the strip 2 by the clamp 51 with a smaller force than the actuator 13.

The inside of the bellows 33 and the bellows 34 are connected to the vacuum welding chamber 5 by a bypass pipe 37.

Next, the vacuum operation will be described. First,
In the welding operation , the leading and trailing ends of the two strips 1 and 2 are sheared by a shearing machine (not shown). During this shearing,
As shown in FIG. 1, one strip, for example the following strip 2, is clamped by a strip support clamp 39, and the other strip, for example, the preceding strip 1, is also clamped by a strip support clamp. Here, the strip supporting clamp 39 on the strip 2 side is
After shearing the strip, push the rear end of strip 2
As shown , the leading and trailing ends of the two strips 1 and 2 move so as to abut against each other. Then, vacuum valve 1
5,16,17,18,19,20,21,22,23
Is closed, the vacuum pumps 24, 25, 26, and 27 are driven to elastically seal the elastic seals 10 and 10 'installed in the upper vacuum container 3 and the lower vacuum container 4, respectively. The welding equipment 100 is moved from the standby position shown in FIG .

Next, the actuator 12 having a position detecting function is provided with a reference surface 30 at a predetermined position of ancillary equipment (not shown).
After the control is completed to be the same as the reference , the actuator 11 is driven to close the upper vacuum container 3 and the lower vacuum container 4,
The strip 1 is clamped on the clamping surface 29 with respect to the reference surface 30.
Between the strips 1 and 2, the vacuum welding chamber 5, the pre-evacuation chamber 6, and the elastic sealing members 10 and 10 '.
Seal between 7, 8 and 9.

The actuator 14 is driven while the strip 2 is controlled by the actuator 13 having a position detecting function so that the reference surface 31 is at an arbitrary abutting position.
To clamp between the clamp surfaces 32 with respect to the reference surface 31.

After setting up in this way, the vacuum valves 15, 16, 17, 18, 19, 20, 21, 22, 22
23, the ends of the strips 1 and 2 and the elastic sealing material 1 are placed in the preliminary exhaust chambers 6, 7, 8, 9 and the vacuum welding chamber 5.
The gas that flows in from the gap generated by the triangular gap formed between 0, 10 'and the scale of the strip, etc. attached to the elastic seals 10, 10' is continuously sucked.
Then, while maintaining the degree of vacuum in the vacuum welding chamber 5 , the vacuum welding chamber 5 is evacuated to about 0.1 to 0.01 [Torr] in about 10 seconds. Is radiated to the butted portions of the strips 1 and 2 and welded.

After the welding is completed, the vacuum valves 15, 16, 1
7,18,19,20,21,22,23 are closed again,
Air is supplied to the pre-evacuation chambers 6, 7, 8, 9 and the vacuum welding chamber 5 so as to be equal to the outside air pressure.
The upper vacuum chamber 3 and the lower vacuum chamber 4 are opened by 12 and the strips 1 and 2 are carried out.

In the above embodiment, the strips 1,
Although the reference surface 30 of the second clamping means is provided on the side of the strip 1 of the lower vacuum container 4, this reference surface may be provided on the upper vacuum container 3 or the strip 2.

The actuators 11, 12, 13,
14 may be a screw drive system using a hydraulic cylinder, a pneumatic cylinder, or an electric motor.
If the positions can be detected, they may be arranged independently and separately. The number of stages of the preliminary exhaust chamber is the elastic sealing material 10, 10 '.
According to the performance of the vacuum welding chamber 5 and the degree of vacuum of the vacuum welding chamber 5, as shown in FIG. Thus, the degree of vacuum in the vacuum welding chamber can be maintained.

If the performance of the elastic sealing members 10 and 10 'is sufficient, as shown in FIG. 6, the number of stages of the preliminary exhaust chamber is reduced, the total pump capacity is reduced, and the equipment is made more compact. it can.

Further, the vacuum suction of the elastic sealing members 10 and 10 'may be performed by a separate vacuum pump without using the bypass pipe 28. Vacuum valves 15, 16, 17, 18, 1
9, 20, 21, 22, and 23 may be other means capable of switching a vacuum state, and may be arranged anywhere as long as they can be arranged in the immediate vicinity of the vacuum chamber.

[0032]

According to the present invention, the following effects can be obtained. (1) In sealing between two strips having different thicknesses and widths and a vacuum welding chamber, the vacuum degree in the vacuum welding chamber can be maintained without using an auxiliary sealing means such as a tab plate or a wedge-shaped seal. Operation and maintenance become easy. (2) Since a plurality of preliminary evacuation chambers are provided around the vacuum welding chamber, the exhaust equipment is minimized, and the degree of vacuum in the vacuum welding chamber is increased in response to an increase in the strip thickness and an increase in leakage due to deterioration of the vacuum seal. Can be maintained stably. (3) The gas inside the bellows is bypassed to the vacuum welding chamber, and the vacuum seal material is vacuum-adsorbed to eliminate minute gaps in the vacuum chamber, thereby shortening the vacuum evacuation time and reducing the size of the evacuation equipment. (4) Since the shape of the elastic sealing material is made into a sheet shape, the replacement work becomes easy. (5) Since the clamping means is arranged immediately adjacent to the welding line, distortion of the strip itself is eliminated, and deformation of the strip due to welding heat can be effectively prevented. (6) If this equipment is used for continuous strip processing equipment, it is possible to join not only low carbon steel but also special steel materials such as stainless steel and silicon steel sheets with this equipment, and highly accurate and highly reliable welding can be performed. it can.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an electron beam welding equipment for continuous strip processing according to the present invention.

FIG. 2 is a sectional view taken along line AA of the electron beam welding equipment for continuous strip processing in FIG.

FIG. 3 is a sectional view taken along line BB of the electron beam welding equipment for continuous strip processing in FIG. 1;

FIG. 4 shows an elastic sealing material (C in FIG. 2) used in the electron beam welding equipment for continuous strip processing according to the present invention.
FIG. 4 is a plan view (as viewed from the line C).

FIG. 5 is a plan view showing another embodiment of the elastic sealing material used in the electron beam welding equipment for continuous strip processing according to the present invention.

FIG. 6 is a plan view showing still another embodiment of the elastic sealing material used in the electron beam welding equipment for continuous strip processing according to the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 strip 2 strip 3 upper vacuum vessel 4 lower vacuum vessel 5 vacuum welding chamber 6 preliminary exhaust chamber 7 preliminary exhaust chamber 8 preliminary exhaust chamber 9 preliminary exhaust chamber 10 elastic seal material 10 ′ elastic seal material 11 actuator (first actuator means) 12 Actuator with position detection function (second actuator means) 13 Actuator with position detection function (third actuator means) 14 Actuator (fourth actuator means) 15 Vacuum valve 16 Vacuum valve 17 Vacuum valve 18 Vacuum valve 19 Vacuum valve DESCRIPTION OF SYMBOLS 20 Vacuum valve 21 Vacuum valve 22 Vacuum valve 23 Vacuum valve 24 Vacuum pump 25 Vacuum pump 26 Vacuum pump 27 Vacuum pump 28 Bypass piping for adsorption of elastic sealing material 29 Clamp surface 30 Reference surface 31 Reference surface 32 Clamp surface 33 Bellows 3 4 Bellows 35 Electron Gun Room 36 Electron Gun 37 Bypass Piping 38 Strip Support Clamp 39 Strip Support Clamp 41 Preliminary Exhaust Chamber 100 Welding Equipment

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadashi Nishino 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Inside the Hitachi Plant (72) Inventor Yu Sato 3-1-1, Sachimachi, Hitachi-shi, Ibaraki No. 1 Hitachi, Ltd. Hitachi Plant (56) References JP-A-6-269956 (JP, A) JP-A 52-104191 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB Name) B23K 15/00-15/06

Claims (6)

(57) [Claims] In 1. A rolling facility strip continuous processing line, prior butt section strip continuous processing electron beam welding equipment connected by welding by electron beam between the tip of the strip to the trailing and the rear end of the strip to be met Te, the set up at least one pre-evacuation chamber plate width and longitudinal directions around the two strips of weld the weld line extending along a weld line so as to surround the periphery of the preliminary exhaust chamber
An upper vacuum container configured to have an elastic sealing material interposed therebetween and opened downward, and the upper vacuum container is symmetrically provided with at least one preliminary discharge in the plate width around the welding line and in the longitudinal direction.
An air chamber is installed and an elastic sealing material is installed between the preliminary exhaust chambers.
A vacuum welding chamber consisting of a lower vacuum vessel with an open top
First actuator means for pressing the upper vacuum container toward one surface of the two strips during welding, and second actuator means for pressing the lower vacuum container toward the other surface of the two strips during welding The first actuator means and the second
By means of the actuator means, the gas flowing from the gap at the end of the plate formed when the two strips are sandwiched between the upper vacuum vessel and the lower vacuum vessel is sucked from at least one preliminary exhaust chamber, and a vacuum is formed around the welded portion. Evacuation means for forming a zone , wherein the preliminary vacuum chamber is longer than the strip width direction of the strip.
Strip continuous processing characterized by being arranged in many directions
E-beam welding equipment for science. 2. The continuous strip processing device according to claim 1,
In electron beam welding equipment, the vacuum evacuation unit, and characterized by evacuating the minute gap portion formed between the vacuum welding chamber and the preliminary vacuum chamber
Beam welding equipment for continuous strip processing. 3. A strip train according to claim 1, wherein
In the electron beam welding equipment for continuous processing, the evacuation means evacuates the elastic sealing material, and adsorbs and fixes the elastic sealing material to the installation location of each vacuum vessel .
Beam welding equipment for continuous strip processing. 4. The method according to claim 1, wherein
In the electron beam welding equipment for continuous strip processing, the elastic sealing material may be formed in a sheet shape.
Characteristic electron beam welding equipment for continuous strip processing. 5. The method according to claim 1, wherein
In the strip continuous processing electron beam welding equipment, the provided inside of the vacuum welding chamber, the strip continuous processing electron beam, characterized in that it comprises a clamping device for fixing the one of the strips of the two strips Welding equipment. 6. The continuous strip processing method according to claim 5,
Third and fourth actuators for pressing the clamping device in an electron beam welding facility
Strike, characterized in that provided through the bellows and position detecting means of the clamping device outside the vacuum welding chamber
Electron beam welding equipment for continuous lip processing.