JPH07214329A - Posture setting device for gouging torch - Google Patents

Abstract

PURPOSE:To exactly and easily set and adjust the position and posture of a gouging torch. CONSTITUTION:This posture setting device 30 for the gouging torch 59 includes stands 1 to 4, a torch holder 58, torch angle adjusting mechanisms 42, 42S, 48, 49, 80 and torch distance adjusting mechanisms 33 to 35. The device has a reference means 60 including index members 65 to 69 having a front end existing in the gouging aiming line in front of the torch, an isolating part extending in a direction parting from the aiming line and rear ends 67, 64 extending in the tail side of the torch along the side face of the torch; an index supporting means 61 for supporting these index members freely movably forward and backward and freely rotatably, means 63a, 65 for detaining the index members in the retreat positions where the front ends thereof part from the aiming line; and means 63b, 65 for detaining the index members in reference positions where the front end thereof exist on the aiming line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attitude setting device for determining the position and attitude of a gouging torch with respect to a surface to be processed, and is not particularly intended to be limited to this. Towing in an automatic gouging device that automatically drives a gouging torch along the steel plate surface to form
Chi attitude setting device.

[0002]

2. Description of the Related Art For example, a cylindrical tank is formed by joining rectangular steel plates of a predetermined size to form a ring, stacking a plurality of stages to form a cylinder having a predetermined height, and attaching a top plate and a bottom plate. The joining of rectangular steel plates is done by welding. Japanese Utility Model Publication No. 59-35341 discloses a horizontal automatic welding machine for welding between upper and lower rectangular steel plates, that is, between adjacent rings. The pedestal of this automatic welding machine is roughly inverted L-shaped when viewed from the side, and is approximately T-shaped when viewed from the front. At the upper part of this pedestal, a curved standing material (ring made by joining steel plates) There are two laterally aligned wheels that ride on top, the left wheel is driven to rotate by an electric motor, and the right wheel is a driven wheel. In order to maintain a constant distance between the gantry and the vertical surface of the material to be processed, there is a copying roller at the bottom of the gantry, which abuts the vertical surface of the material to be processed, and the welding roller is placed above the copying roller. Chi is located.

[0003]

Prior to welding between the rings, a groove must be formed and placed in the horizontal seam between the rings. This groove is formed in advance on the rectangular steel plate before stacking the rings or before forming the rings, but after seam welding between the rings on one surface (for example, the front surface) side, the other surface (rear surface) is formed. If) is carried out as it is, welding defects are likely to occur. Therefore, it is necessary to melt and blow off the first layer of front welding by gouging (back chipping).

Manual gouging using a gouging torch or grinder is labor-intensive, and in addition to producing a large amount of noise, fume, and dust, the working environment is not good, and processing irregularities are large. Therefore, automatic gouging is desired. Although automatic gouging can be performed by replacing the welding torch disclosed in Japanese Utility Model Publication No. 59-35341 with a plasma gouging torch, a groove with uniform and accurate position cannot be immediately obtained. In the case of welding, there is a groove and the welding torch can be accurately positioned (groove control), but in the case of gouging, the joint between the rings on one side (for example, the surface) side. The back seam, which is uneven due to welding, must be processed into an orderly groove having a predetermined cross section, and it is important to set the position and posture of the gouging torch with respect to the ring formed by joining the rectangular steel plates.

It is an object of the present invention to accurately and easily set or adjust the position and posture of the gouging torch in gouging such as the above-described groove forming on the seam between rings.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a cradle (1 to 1 for driving a gouging torch (59) along a surface to be processed.
4), torch holder (58) that supports the gouging torch on the gantry, and angle adjustment mechanism (42, 42S, 484) that determines the inclination angle of the gouging torch with respect to the surface to be processed on the gantry.
(9, 80) and the position setting device (30) of the gouging torch including the distance adjusting mechanism (33 to 35) that determines the distance of the gouging torch with respect to the surface to be processed on the gantry, in front of the gouging torch (59). The tip portion (69t) located on the gouging aiming line, the separation portion (69r) extending continuously in a direction away from the gouging aiming line, and the side surface of the gouging torch (59) continuing to this separation portion. Indicator member having rear end portions (67, 64) extending along the torch rear side along
(64 to 69); The index member is rotatably supported in the direction in which its tip part is away from the gouging aiming line, and the index member is movable to the torch tail side at a rotation angle where the tip part is away from the gouging aiming line. Index support means (61) for supporting the index member;
Retraction locking means (63a, 65) for holding the torch rearward position and its tip at a rotation angle away from the gouging aiming line; and the index member with the tip of the torch. A reference tool (60) including reference position locking means (63b, 65) for holding at a rotation angle located at the front and on the gouging target line. In addition, in order to facilitate understanding, the reference numerals are given in parentheses to corresponding elements or corresponding matters in the embodiments shown in the drawings and described later.

[0007]

The distance adjusting mechanism (33 to 35) determines the distance of the gouging torch (the position in the radial direction R from the center line of the cylindrical tank) to the surface to be processed; the angle adjusting mechanism (42, 42)
(S, 48, 49, 80) determines the inclination angle of the gouging torch (plasma incident angle, Fig. 6) with respect to the surface to be processed.

By the reference position locking means (63b, 65), the reference tool (60)
When the index member (64-69) of (1) is positioned so that its tip (69t) is on the gouging aiming line in front of the gouging torch (59), the machining position of the gouging torch (59) is (69t) or before and after that (on the target line). Therefore, the operator looks at the tip (69t) and looks at the gouging torch (5
The processing position by 9) can be recognized easily and accurately. Tip
(69t) and the relative position and orientation of the surface to be processed, while referring to the distance adjustment mechanism (33 to 35) and the angle adjustment mechanism (42, 42S,
48, 49, 80), the position and attitude of the gouging torch can be adjusted and set to a desired position and inclination angle accurately and easily.

With the retracting and locking means (63a, 65), the index member (64-69) of the reference tool (60) is moved to the rear side of the torch, and its tip (69t) is aimed at gouging. When positioned so that the rotation angle is away from the line, the gouging
The index members (64-69) are located in front of the
It does not interfere with gouging of Chi (59). Therefore, after adjusting and setting the position and posture of the gouging torch, the index members (64 to 69) may be retracted by the retracting locking means (63a, 65) in this manner.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a usage state of a first embodiment of the present invention during assembly of a cylindrical tank. This is done by stacking four steel plate rings made by welding rectangular steel plates, ending the horizontal seam welding on the front and back sides up to the third step, and ending the horizontal seam welding on the front surface between the third and fourth steps. This is a step of forming a groove (back chip) for horizontal seam welding of the inner surface by gouging. A plasma gouging power supply device, a connection cable, and a connection gas hose are placed outside the unfinished tank. One end of the connection cable and the connection gas hose is a cable of a stand hung on the upper end of the unfinished tank. It is supported by a bull duct 5 and is connected to a relay box (FIG. 3) on the frame. The connection cable includes a power line, a signal line and a water conduit, which is connected to the water treatment machine 9 (FIG. 3). In the following description, the height direction of the incomplete tank is the Z direction,
The radial direction is called the R direction, and the horizontal direction along the tank peripheral surface is called the S direction.

(1) Stand In FIG. 2, the left side of the stand hanging from the upper end of the unfinished tank in FIG. 1 (the front viewed from the center of the tank), and FIG. 3 the back (viewed from the center of the tank). Front).
The pedestal is a vertical upper frame 1 and a base 2, which is integrated with the upper frame 1 and extends horizontally from the upper end of the upper frame 1 from the inside of the tank to the outside.
The joint bar 3 has an upper end fixed to the lower part of the upper frame 1 and a lower frame 4 fixed to the lower end of the bar 3 and has a substantially inverted L shape. The base 2 has a position adjusting mechanism in the R direction.
Wheels 11 and 13 are rotatably supported via (not shown), and are mounted on the upper end surface of the uppermost ring (a ring formed by welding a rectangular steel plate) of the unfinished tank. That is, the above-mentioned mount is suspended inside the tank from the uppermost ring of the unfinished tank via the wheels 11 and 13. Wheel 1
Reference numerals 1 and 13 are separated in the S direction, and there is a copying roller 16 (FIG. 2) at the position of the apex of an isosceles triangle whose base is the line connecting the wheels 11 and 13.

(2) Wheel Drive Mechanism The output shaft of the AC motor 12 is connected to the axle of the wheel 11 extending in the R direction via a reduction gear mechanism.
3, the axle extending in the R direction has a reduction gear mechanism and a chain.
The output shaft of the AC motor 14 is coupled to the motor through an coupling. The wheels 11 and 13 have the same structure and size, the AC motors 12 and 14 have the same standard, and the reduction ratio between the wheels / motors is also the same.

FIG. 13 shows the combination of the wheels, the reduction gear mechanism, the chain coupling, the AC motor and the inverter. The AC motors 12 and 14 are connected in parallel to the output terminals of one inverter 100 (commercial AC → DC → variable frequency AC converter) whose output frequency is variable. The output frequency of the inverter 100 is the potentiometer 101.
Can be adjusted with. Since the power transmission system between the wheels and the motor is equipped with a chain coupling on only one side, an AC motor is used.
When the wheels 12 and 14 are energized at the same time, the wheel 11 without chain coupling starts to rotate first and follows it.
The wheels 13 via the chain coupling start to rotate. This is because the chain coupling has expansion and contraction for backlash and load.

Due to the presence of the chain coupling, the increase in the power supply load at the time of starting is mitigated and the shocking increase in the running acceleration (acceleration shock) is buffered. In addition, the AC motor 12 and the output terminal of one AC power source (inverter) 100,
Since 14 are connected in parallel, power distribution to the light load electric motor is reduced and the power distribution to the high load electric motor is increased automatically. For example, when one wheel slips, the rotation speed of the electric motor coupled to it increases, but since it is an AC motor, the speed increase is automatically suppressed and power consumption is reduced, and the other slip When the speed of the electric motor (high load) that drives the missing wheels begins to decrease, the power consumption of the electric motor automatically increases so as to increase the speed. As described above, in this embodiment, the power transmission system of one wheel / motor coupling is provided with the chain coupling to suppress the impact of the movement of the gantry, and each wheel is independent by one AC motor. Driven and both motors 1
It is connected in parallel to two AC power supplies so that the rotation speeds of both wheels are automatically balanced to a constant speed corresponding to the output frequency of the AC power supply, regardless of load fluctuations. The start-up is smooth, and the gantry moves in the S direction at a steady constant speed. The moving speed of the gantry is set by the potentiometer 101.

(3) Copy Roller Supporting Structure FIG. 4 shows a structure for supporting the copy roller 16 on the pedestal. A roller support structure 15 is fixed to the partition wall 6 of the lower frame 4 in a copying manner. The copying roller 16 is rotatably supported by a support leg 17 (the rotation axis extends in the S direction). The support leg 17 is mounted on the protruding base 18 so as to be rotatable around a rotation shaft extending in the R direction. The protruding base 18 is fixed to the tip of the inner threaded rod 19. The inner threaded rod 19 penetrates the guide sleeve 21. Guide sleeve 21
Is fixed to the frame body 23, and the frame body 23 is fixed to the partition wall 6. A groove 20 parallel to the direction (R) in which the rod 19 extends is engraved on the outer peripheral surface of the inner threaded rod 19, and the tip of a bolt 22 enters this groove 20. This bolt 2
Although the rotation of the inner threaded rod 19 is prevented by 2, the inner threaded rod 19 can move back and forth in the direction R along the guide sleeve 21.

A screw rod 24 is screwed into the female screw hole of the inner screw rod 19, and a handle 25 is fixed to the screw rod 24. When the handle 25 is turned clockwise, the threaded rod 24 tries to enter deep inside the inner threaded rod 19, but the movement of the threaded rod 24 in the R direction is restrained by the frame body 23. 19 tries to retreat in a direction (inward of the tank) away from the steel plate (a part of the ring of the fourth stage) W forming the tank wall. However, since the copying roller 16 is pressed against the steel plate W by the rotating moment about the wheels 11 and 13 due to the gravity of the mounts (1 to 4), the copying roller 16 does not separate from the steel plate W, The pedestal (1 to 4) is a steel plate W
It moves in a direction approaching (rotating around wheels 11 and 13). That is, the distance in the R direction between the lower frame 4 and the steel plate W becomes shorter. When the handle 25 is rotated counterclockwise, the threaded rod 24 projects the inner threaded rod 19 toward the steel plate W, whereby the pedestals (1 to 4) move in the direction away from the steel plate W.
That is, the distance in the R direction between the lower frame 4 and the steel plate W becomes long.

Supporting Structure of Plasma Gouging Torch Referring again to FIG. 2, a plasma gouging torch 59 (hereinafter simply referred to as torch 59) is disposed below the copying roller 16. Referring also to FIG. 3, the bottom floor 7 of the lower frame 4
An abutment 31 is fixedly attached to the abutment 31, and the abutment 31 is equipped with a mechanism for supporting the torch 59. 5 and 6
A mechanism for supporting the torch 59 is shown in FIG. (4) R-direction torch position adjusting mechanism Referring to FIGS. 5 and 6, the R support frame 3 is attached to the abutment 31.
2 is fixed, a screw rod 33 extending in the R direction is rotatably coupled to the R support frame 32, and two guide bars also extending in the R direction are provided on both sides of the screw rod 33. Is stuck to. A handle 34 is fixed to one end of the screw rod 33, and a lock lever 35 for restraining the rotation of the screw rod 33 is coupled to the R support frame 32. A slider fixed to the S support frame 36 is screwed to the screw rod 33, and the slider is R-shaped.
The two guide bars of the support frame 32 are guided so as to be movable in their extending directions. When the lock lever 35 is rotationally driven to the release position and the handle 34 (screw rod 33) is rotated clockwise, the S support frame 36 moves in the direction R away from the steel plate W and rotates counterclockwise. And the S support frame 36
Moves toward the steel plate W in the R direction. When the lock lever 35 is rotationally driven to the lock position, the handle 34
(Screw rod 33) cannot be turned even with a considerably strong force.

(5) S-direction torch position adjusting mechanism Referring to FIGS. 5 and 6, a screw rod 37 extending in the S direction is rotatably coupled to the S support frame 36, and also extends in the S direction. The guide bars 39 and 40 of the book are screw rods 3.
It is on both sides of 7 and is fixed to the S support frame 36. A handle 38 is fixed to one end of the screw rod 37, and a lock lever 41 for restraining the rotation of the screw rod 37 is coupled to the S support frame 36. A slider fixed to the S moving plate 80 is screwed to the screw rod 37, and the slider is provided with two guide bars of the S support frame 36.
9 and 40 are movably guided in their extending directions. When the lock lever 41 is rotationally driven to the release position and the handle 38 (screw rod 37) is rotated clockwise, the S moving plate 80 moves rightward in FIG. 6, and when it is rotated counterclockwise, S The moving plate 80 moves to the left in FIG. When the lock lever 41 is rotationally driven to the lock position, the handle 38
The (screw rod 37) cannot be turned with a considerably strong force.

(6) Plasma Incident Angle Adjusting Mechanism Referring to FIGS. 5 and 6, lock levers 48 and 49 are provided on the S moving plate 80 via the bottom plate 42S of the Z direction torch position adjusting mechanism. Lock lever 48, 49
The bottom plate 42S portion can be easily rotated by driving to rotate to the release position, and the angle with respect to the vertical surface of the steel plate W (plasma incident angle with respect to the vertical surface of the steel plate W) can be adjusted. When the lock levers 48 and 49 are rotationally driven to the lock position,
The Z support frame 42 cannot be turned by a considerably strong force.

(7) Z-direction torch position adjusting mechanism Referring to FIGS. 5 and 6, a screw rod 43 extending in the Z-direction is rotatably coupled to the Z-support frame 42, and also extends in the Z-direction. Guide bar-46, 47 of book is screw rod 4
3 on both sides and fixed to the Z support frame 42. A handle 44 is fixed to one end of the screw rod 43, and a lock lever 45 for restraining the rotation of the screw rod 43 is connected to the Z support frame 42. A slider fixed to a supporting arm 50 is screwed to the screw rod 43, and the slider is provided with two guide bars of the Z supporting frame 42.
6, 47 are movably guided in their extending directions. When the lock lever 45 is rotationally driven to the release position and the handle 44 (screw rod 43) is turned clockwise, the support arm 50 moves upward, and when it is turned counterclockwise, the support arm 50 moves. The frame 50 moves downward. When the lock lever 45 is rotationally driven to the lock position, the handle 44 (screw rod 4
As for 3), it cannot be turned with a fairly strong force.

(8) Automatic advance / retreat mechanism Referring to FIG. 6, the support arm 50 has an advance / retreat mechanism frame 51.
Are fixed, and an automatic advancing / retreating mechanism is incorporated in the frame 51. That is, the frame 51 has a screw rod extending in the longitudinal direction (and parallel to the paper surface of FIG. 6) and guide bars on both sides thereof, and the screw rod is electrically connected to the screw rod through the reduction mechanism 53.
The rotary shaft of the motor 54 is connected. A slider fixed to the advancing / retreating plate 52 is screwed to the screw rod. Electric mode
When the motor 54 rotates in the forward direction, the advancing / retreating plate 52 moves toward the steel plate W along the frame 51, and when the electric motor 54 rotates in the reverse direction, the advancing / retreating plate 52 moves away from the steel plate W along the frame 51. Moving. Incidentally, if the plasma arc voltage between the steel plate W and the torch 59 deviates above the set range, an electric mode is set.
A forward / backward drive circuit that drives the electric motor 54 in the normal direction, stops energizing the electric motor 54 in the set range, and reversely drives the electric motor 54 when the plasma arc voltage falls below the set range. (Not shown) is provided, and this circuit energizes the electric motor 54 for the above-described forward rotation and reverse rotation drive.

(9) Groove lateral cross-section shape adjusting mechanism Referring to FIG. 6, a rotating plate 56 is in surface contact with the advancing / retreating plate 52. A torch holder 58 is fixed to the rotating plate 56, and a plasma gouging torch is attached to the torch holder 58.
Chi 59 is fixed. A shielding plate 70 is also fixed to the rotating plate 56. FIG. 7 shows a plan view of the welding torch 59 viewed from the direction indicated by the arrow A7 shown in FIG.

Referring to FIG. 7, a pin 55 standing on the advancing / retreating plate 52 penetrates the rotating plate 56, and the rotating plate 56 can rotate about the pin 55. 1 centered on pin 55
Four arc-shaped through holes along one circle are formed in the rotary plate 56, and bolts 57 (four in total) penetrate these holes and are screwed into the advancing / retreating plate 52. The rotating plate 56 can be rotated about the pin 55 by loosening the bolt 57. This rotation is due to the central axis of the pin 55 (see FIG.
For adjusting the rotation angle of the torch 59 centered on the arrow A7), that is, the torch 59 with respect to the horizontal plane.
The angle (angle of inclination with respect to the groove center line, Fig. 10) of the processing directivity line (the traveling direction of plasma emitted from the torch) is adjusted.

If this angle is set to zero (the torch 59 is horizontal) (the position shown by the solid line in FIG. 10), the cross sectional shape of the groove obtained by gouging with the plasma arc of the torch 59 is as shown in FIG. As shown in FIG. 11 (a), they are substantially vertically symmetrical in the Z direction. When the bolt 57 is loosened and the rotating plate 56 is rotated so that the torch 59 faces downward (the position shown by the chain double-dashed line in FIG. 10) and the bolt 57 is tightened, the plasma arc of the torch 59 is As shown in FIG. 11 (b), the groove cross-sectional shape obtained by gouging with a groove has a rectangular cross section in which the lower groove hypotenuse is steep and the upper groove hypotenuse is gentle. Further, the bolt 57 is loosened and the torch 59 is directed upward (see FIG. 1).
Rotating plate 56 so that it is in the posture indicated by the one-dot chain line at 0)
When the screw 57 is rotated and the bolt 57 is tightened, the transverse cross-sectional shape of the groove obtained by gouging with the plasma arc of the torch 59 is shown in FIG. Thus, the upper oblique side of the groove has a steep sloped cross section. As described above, by adjusting the turning angle of the turning plate 56, the groove cross-sectional shape can be adjusted and selectively set.

(10) Reference tool for setting torch position Although not shown in FIG. 6, the rotary plate 56 to which the torch holder 58 is fixed is provided with the torch 59 at the gouging target position. A reference tool 60 for indicating is fixed. The external appearance of the reference tool 60 is shown in an enlarged manner in FIG. 8, and its longitudinal section is shown in FIG. A plunger 64 is inserted into the tube stem 61, and a small diameter rod 67 is fixed to the tip of the plunger 64. The rod 67 penetrates the tip surface of the tube stem 61 and the plasma injection port side of the torch 59. Extends to. The rear end of the plunger 64 is pushed by the compression coil spring 66, and a force for moving the plunger 64 toward the plasma injection port is applied to the plunger 64. A connecting member 68 is fixed to the tip of the rod 67, and a rear end of a small-diameter indicator rod 69 bent 90 degrees at two positions is fixed to the connecting member 68. As shown in FIG. 7, the indicator rod 69 is a tip portion 69t located on the center line (gouging aiming line) passing through the plasma injection port of the gouging torch 59, and is continuous with the tip portion 69t and is centered on the gouging aiming line. A separating portion 69r extending in the radial direction (direction away from the torch center), and a rear end portion 69b which is continuous with the separating portion 69r and extends toward the torch tail end side in parallel with the aiming line of the gown. Then
The end of the rear end portion 69b is fixed to the connector 68.

A U-shaped opening 62 is formed on the peripheral surface of the tube trunk 61.
And the plunger 64 is opened through this opening 62.
The knob 65 that is fixedly attached to the bulge protrudes outward from the barrel stem 61. In the opening 62, the cylinder stem 6 for locking the plunger 64 by placing the index rod 69 at the reference position (FIG. 7).
One branch opening 63a and 63b extending in the circumferential direction is continuous. FIG. 9 shows an enlarged view of the tube trunk 61 with the opening 62 facing the front.

FIG. 7, FIG. 8 and FIG. 9 show the indicator rod 69.
Is placed at the reference position, that is, the tip portion 69t is placed on the gouging target line of the torch 59.
In this state, the knob 65 rotates to the end of the branch opening 63b and engages with the branch opening 63b. The direction pointed by the tip portion 69t of the index rod 69 is the gouging target direction.
Before the plasma arc is generated on the torch 59 for gouging, the knob 65 is first rotated about 120 degrees from the rotated position shown in FIGS. 7 to 9 along the branch opening 63b. As a result, the knob 65 reaches the opening main part of the opening 62 extending in the direction in which the rod 67 extends, and the indicator rod 69
The tip portion 69t of the torch 59 deviates from the gouging aiming line of the torch 59 and comes to the right side of the shielding plate 70 in FIG. Next, here, the knob 65 is pushed down to the branch opening 63a against the repulsive force of the compression coil spring 66. As a result, the tip portion 69t of the index rod 69 is lowered to the position of the thin diameter portion near the torch holder 58, which is in front of the tip large diameter portion of the torch 59, and the spring 66 is compressed. Next, pick 65
Is rotated along the branch opening 63a to its end. As a result, the knob 65 engages with the branch opening 63a. In this state, the tip portion 69t of the index rod 69 is located substantially above the small diameter portion of the torch 59 near the torch holder 58. This is the retracted position of the index rod 69, and in this state,
The index rod 69 does not interfere with the gouging of the steel plate by the torch 59 at all.

When the torch 59 is set to the gouging position with respect to the joint position of the uppermost ring of the unfinished tank and the ring below it, the knob 65 (retracted position) engaged with the branch opening 63a. Is rotated along the branch opening 63a.
Then, when the knob 65 comes off the branch opening 63a, the plunger 64 is pushed by the repulsive force of the compression coil spring 66, and the rods 67 and 69 jump forward. So picking 6
When 5 is turned along the branch opening 63 to the end thereof, the knob 65 and the rods 67 and 69 become the reference positions shown in FIGS. In this state, the operator can clearly recognize the position and direction of the gouging aiming position of the torch 59 with respect to the steel plate W by looking at the tip portion 69t. Adjustment of position and posture for proper gouging,
Easy to set up.

(11) Setting of Torch Position and Attitude The manner of use of the lateral gouging device described above by an operator will be described below. When the gantry is attached to the unfinished tank as shown in FIGS. 2 and 3, the worker firstly makes a copy roll.
The protruding position of the la 16 is adjusted to adjust the distance between the lower frame 4 and the steel plate W. This is done by turning the handle 25 (FIG. 4). Then, the position and attitude of the torch 59 are adjusted as follows.

A. Initial position setting of automatic advance / retreat mechanism: A switch on the operation panel surface of the automatic advance / retreat mechanism (52 to 54) of the operation panel 10 is operated to set the advance / retreat plate 52 to the center position of the advance / retreat range.

B. Setting of the index rod 69: reference tool 60
The knob 65 (retracted position) engaged with the branch opening 63a (FIG. 7) is rotated along the branch opening 63a. This causes the rods 67 and 69 to jump forward. Therefore, the knob 65 is turned along the branch opening 63b to the end thereof. As a result, the knob 65 and the rods 67 and 69 are in the reference positions shown in FIGS. In the following adjustment, the operator adjusts the torch position and posture while paying attention to the position and direction (direction) of the tip end portion 69t of the index rod 69.

C. Setting of groove cross-sectional shape: Lock lever
Turn 48 and 49 to the release position and attach the arm 50 to the screw rod 4
Rotate about 3 around 90 degrees counterclockwise in FIG. This causes the torch 59 to face the plane of the steel plate W at a substantially right angle. Next, the bolts 57 (4 pieces; FIG. 7) are loosened and the rotating plate 56 is rotated clockwise or counterclockwise (FIG. 1).
0). That is, the angle of the torch 59 with respect to the horizontal plane is adjusted. After completing the adjustment, tighten the bolt 57. Then, the arm 50 is rotated about the screw rod 43 in the clockwise direction in FIG. 6 by about 90 degrees (returning to the position shown in FIG. 6), and the lock levers 48 and 49 are rotated to the locked position.

D. Torch position adjustment in R direction: Lock lever
Turn 35 to the release position and turn handle 34. When it is turned clockwise, the torch 59 approaches the steel plate W in the R direction,
When it is rotated counterclockwise, it separates from the steel plate W. After completing the adjustment, rotate the lock lever 35 to the locked position.

E. S-direction torch position adjustment: Lock lever
Turn 41 to the release position and turn handle 38. When it is turned clockwise, the torch 59 moves rightward in FIG. 6, and when it is turned counterclockwise, it moves leftward. After completing the adjustment, rotate the lock lever 41 to the locked position.

F. Adjustment of torch angle with respect to flat surface (correctly curved surface) of steel plate W: Turn lock levers 48 and 49 to release position, and turn arm 50 clockwise or counterclockwise about screw rod 43. Forget After completing the adjustment, rotate the lock levers 48 and 49 to the locked position.

G. Torch height adjustment: Lock lever 45
Turn to the release position and turn the handle 44. When it is turned clockwise, the torch 59 rises in the Z direction, and when turned counterclockwise it descends. After completing the adjustment, rotate the lock lever 45 to the locked position.

The adjustments of C to D are not limited to the order described above, and even if the adjustment is performed once, the adjustment is performed once for fine adjustment after the other adjustments. There is no need to limit it. As described above, the tip of the tip portion 69t of the index rod 69 is brought into contact with the groove processing starting end at the vertical joint position of the steel plate W, and the posture of the tip of the index rod 69 (the gouging aiming line of the torch 59). ) As desired. When this is completed, the knob 65 is lowered to the branch opening 63a and engaged therewith. This enables the indicator rod 69
The tip portion 69t of the is located substantially above the small diameter portion of the torch 59 near the torch holder 58 (the retracted position).

(12) Automatic gouging When an operator operates a switch on the gouging operation panel surface of the operation panel 10 to set the gouging energizing condition and presses the start button, a controller built in the operation panel 10 provides a system −
Due to the can control, plasma gas Ar is supplied to the plasma gouging torch 59, and after preflow, the high frequency and the no-load voltage are applied to the torch 5 due to ignition of the pilot arc.
It is applied between the tip electrodes of 9 tips, and a pilot arc is generated. At the same time, the automatic advancing / retreating mechanism operates to move the torch forward, and when the pilot arc approaches the workpiece (W), the main arc trigger power is turned on and the torch 59
High temperature plasma is jetted from the tip of the.

When the plasma arc (main plasma) is activated, the controller turns on the inverter 100 to start the rotational driving of the wheels 11 and 13, and
A start (control start) is instructed to the controller controlling the energization of the electric motor 54 of the automatic advancing / retreating mechanism (52 to 54). The rotation speeds of the wheels 11 and 13 are determined according to the resistance value set in the potentiometer 101 of the inverter 100, and the gantry (1 to 4) is not completed at a constant speed (1 to 2 m / min). It moves along the inner surface of the tank. During this constant speed movement, the torch 59 continuously injects high-temperature plasma, and the controller of the automatic advancing / retreating mechanism keeps the rotating plate 56 (torque above it) so that the plasma arc voltage becomes constant. C. 59) is driven to project or retract ((a) of FIG. 12). In this manner, plasma gouging is automatically performed at the horizontal joint between the fourth stage ring and the third stage ring.
The adjustments of D to G can be performed during this gouging step.

In the embodiment described above, the distance adjusting mechanism (33 to 35) controls the distance (position in the radial direction R from the center line of the cylindrical tank) of the gouging torch with respect to the flat surface or curved surface of the material to be processed. Fixed; Height adjustment mechanism (43
~ 45) determines the position (height) of the gouging torch in the hanging direction (vertical direction Z); the angle adjusting second mechanism (4
2,42S, 48,49,80) determines the inclination angle (plasma incident angle, FIG. 6) of the gouging torch with respect to the flat or curved surface of the workpiece; and the first mechanism for adjusting the angle (55 to 57).
Thus, the inclination angle of the gouging torch with respect to the horizontal plane (the inclination angle with respect to the groove center line, FIG. 10) is determined, that is, the groove cross-sectional shape (FIG. 11) is determined. That is, using these mechanisms, the distance (FIG. 6), height (FIG. 2), inclination angle (plasma incident angle, FIG. 6) and groove cross-sectional shape (FIG. 10,
11) can be adjusted and set.

The forward / backward drive mechanism (52-54) drives the first mechanism (55-57) forward / backward in the direction (A8) along the machining directing line of the gouging torch. That is, the controller of the advancing / retreating drive mechanism monitors the plasma arc voltage between the workpiece (W) and the plasma gouging torch 59 and raises the voltage so as to maintain it at a constant value. Sometimes the forward / backward drive mechanism (52 to 54) causes the first mechanism (55 to 5).
7) is ejected and retracted when it falls. That is, when the flat surface or curved surface of the material to be processed (W) is concave or convex, the advancing / retreating drive mechanism (52 to 54) protrudes the first mechanism (55 to 57) (projection of the torch) to form a convex shape. Sometimes it is retracted (torch retracted). As a result, a groove having a constant depth is formed following the unevenness of the surface of the processing target material.

Assuming that the advance / retreat drive mechanism (52-54) drives the gouging torch 59 to advance / retreat, and the angle of the advance / retreat drive mechanism (52-54) is adjusted by the first mechanism in order to adjust the inclination angle of the torch. By doing so, when the torch 59 is driven back and forth, the torch 59 moves, for example, as shown in FIG. 12B, and the bottom position of the groove shifts in the vertical direction (Z). A gap occurs. However, in the above-described embodiment, the forward / backward drive mechanism (52-54) drives the first mechanism (55-57) forward / backward, and the first mechanism (55-57) causes the gouging torch 59 to tilt relative to the horizontal plane (see FIG. 10). ) Is set, and when the first mechanism (55 to 57) is driven back and forth, the torch 5
9 moves, for example, as shown in FIG. 12A, and the groove bottom position DWd does not substantially shift in the vertical direction (Z).

In the gouging apparatus described above, the gouging dust drops during the gouging process.
Is above the torch 59, no gouging dust adheres to the copying roller 16 and no gouging dust adheres to the steel plate surface with which the copying roller 16 abuts. The profile of the steel plate surface of the la 16, that is, the profile of the lower frame 4 with respect to the steel plate surface is accurate.

Further, the above-described gouging device is provided with a chain coupling in the power transmission system of one wheel / motor connection to suppress the impact of the movement of the gantry, and each wheel has one
Independently driven by one AC motor, both motors were connected in parallel to one AC power supply, and the rotation speeds of both wheels automatically corresponded to the output frequency of the AC power supply, despite each load change. Since the pedestal is automatically balanced at a constant speed, the gantry can be smoothly started, and the gantry moves in the S direction at a steady constant speed.

Further, in the above-described embodiment, since the reference tool 60 is provided integrally with the plasma gouging torch 59,
It is easy to adjust and set the position and orientation of the cutting tool 59 with respect to the processing target material (W). The index rod 69 is set to the reference position by rotating the knob 65 engaged with the branch opening 63a to remove it from the branch opening 63a, and then branching the branch opening 63b.
It is realized by a two-action action of turning to the terminal end of and engaging with the branch opening 63b. To return the index rod 69 from the reference position to the retracted position, the knob 65 engaged with the branch opening 63b is rotated to disengage it from the branch opening 63b, and then pushed down to the branch opening 63a. A sleeve that turns to the end and locks in the branch opening 63a.
Realize by action. Thus, pulling out and storing the index rod 69 is extremely simple.

[0047]

The reference position locking means (63b, 65) allows the reference tool (6
The index member (64-69) of (0) is positioned so that its tip (69t) is on the gouging aiming line in front of the gouging torch (59) (Fig. 7), the gouging torch (59). The machining position of is at the tip (69t) or before and after it (on the aim line). Therefore, the operator can easily and accurately recognize the processing position by the gouging torch (59) by looking at the tip portion (69t). Using the distance adjustment mechanism (33 to 35) and angle adjustment mechanism (42, 42S, 48, 49, 80) while referring to the relative position and orientation of the tip (69t) and the surface to be processed, it is accurate and easy. The position and attitude of the gouging torch can be adjusted and set to a desired position and inclination angle.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a horizontal automatic gouging device equipped with an embodiment of the present invention.

FIG. 2 is an enlarged side view of the gouging device shown in FIG. 1 viewed from the wheel 11 side.

FIG. 3 is an enlarged front view of the back portion of the gouging device shown in FIG. 1 as seen from inside the unfinished tank.

FIG. 4 is an enlarged vertical cross-sectional view of a support structure for the copying roller 16 shown in FIG.

5 is an enlarged vertical sectional view of a supporting structure of the plasma gouging torch 59 shown in FIG.

6 is a plan view showing an outline of one embodiment of the present invention, and is a plan view showing a cross section of a threaded rod 43 of the torch support structure shown in FIG.

FIG. 7 is an enlarged plan view showing the torch 59 shown in FIG. 6 as seen from the direction of arrow A7.

8 is an enlarged perspective view showing the external appearance of the reference tool 60 shown in FIG.

9 is an enlarged plan view of the tube stem 61 shown in FIG.

10 is an enlarged plan view showing the torch 59 shown in FIG. 6 as seen from the direction of arrow A7.

11 is an enlarged cross-sectional view of the gouging end portion of the steel plate W shown in FIG. 2, and FIG. 11 (a) is a groove cross-section obtained when gouging the torch 59 in the posture shown by the solid line in FIG. 10 (b) shows a groove cross section obtained when gouging the torch 59 in the posture shown by the chain double-dashed line in FIG. 10, and FIG. 10 (c) shows the torch 59 at one point in FIG. The groove cross-section obtained when gouging in the posture shown by the chain line is shown.

FIG. 12 (a) is a view showing the advancing / retreating mechanism frame 51 and the tray shown in FIG.
It is a side view which simplifies and shows the torch 59, and the state in which the torch 59 is projected by the advancing and retracting mechanism is shown by a two-dot chain line.
(B) is the bottom position shift of the groove when the torch 59 is projected by the advancing / retreating mechanism in the case where the frame 51 is rotated without rotating the torch on the frame 51 by the pin 55. DW
Indicates d.

FIG. 13: Wheels 11 and 13 and AC motor 1 shown in FIG.
It is an enlarged plan view which shows the mechanical coupling of 2 and 14.

[Explanation of symbols]

1: Upper frame 2: Base
3: Joint bar 4: Lower frame 5: Cable duct
6: Middle partition floor 7: Bottom floor 8: Cart control panel
9: Water treatment machine 10: Operation panel 11, 13: Wheel 1
2, 14: AC motor 15: Roller support structure 16: Copy roller 1
7: Support leg 18: Projection stand 19: Inner threaded rod 2
0: Groove 21: Guide sleeve 22: Bolt 2
3: Frame 24: Screw rod 25: Handle 30: Torch support structure 31: Abutment 3
2: R support frame 33: Screw rod 34: Handle 3
5: Lock lever 36: S support frame 37: Screw rod 3
8: Handle 39, 40: Guide bar 41: Lock lever 4
2: Z support frame 43: Screw rod 44: Handle 4
5: Lock lever 46, 47: Guide bar 48: Lock lever 4
9: Lock lever 50: Support arm 51: Advance / retract mechanism frame 5
2: Advance / retreat plate 53: Reduction mechanism 54: Electric motor 5
5: Pin 56: Rotating plate 57: Bolt 5
8: Torch holder 59: Plasma gouging torch 6
0: Reference tool 61: Tube trunk 62: Opening 63
a, 63b: branch opening 64: plunger 65: knob 6
6: compression coil spring 67: rod 68: connecting tool 6
9: Index rod 69t: Tip portion 69r: Isolation portion 69
b: rear end portion 70: shield plate 80: S moving plate 10
0: Inverter 101: Potentiometer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Okuyama 7-6-1, Higashi Narashino, Narashino City, Chiba Prefecture Nittetsu Welding Industry Co., Ltd.

Claims (3)

[Claims] 1. A gantry for driving a gouging torch along a surface to be machined, a torch holder for supporting the gouging torch on the gantry, and an angle defining an inclination angle of the gouging torch with respect to the object to be machined on the gantry. Gouging for the surface to be machined on the adjustment mechanism and the mount
In a posture setting device for a gouging torch including a distance adjusting mechanism for determining the distance of the cheech, a tip portion located on the gouging aiming line in front of the gouging torch and a separation extending continuously from the gouging aiming line in a direction away from the gouging aiming line. An index member having a portion and a rear end portion which is continuous with the separated portion and extends to the rear side of the torch along the side surface of the gouging torch; the index member is rotatably movable in a direction in which its tip end is away from the gouging aiming line. Index support means for supporting and movably supporting the index member to the rear side of the torch at a rotation angle away from the gouging aiming line; the position at which the index member is moved to the rear side of the torch and its tip Retraction locking means for retaining the part at a rotation angle away from the gouging aiming line; and the index member, the tip of which is in front of the torch, and the gouging aiming line A gouging torch posture setting device, comprising a reference tool including a reference position locking means for retaining at an upper rotation angle. 2. The attitude setting device for a gouging torch according to claim 1, wherein the reference tool further includes spring means for pushing the index member along a direction in which the gouging aiming line extends. 3. The index support means is a tubular member having an opening extending in a direction in which the gouging aiming line extends and branch openings continuous at both ends thereof; the index member has a rear end portion extending from the tip of the tubular member. The spring means is inside the tubular member and pushes the index member; and the retracting locking means is one of the branch openings. The gouging torch posture setting device according to claim 2, wherein the knob is a combination of the knobs, and the reference position locking means is a combination of the other of the branch openings and the knobs.