JPS60108168A - Working device for metal - Google Patents

Abstract

PURPOSE:To suck and remove dust and to strip a spot weld in short time by providing a hood around an electrode rod of a metal working device and providing a suction device using said hood as a suction port. CONSTITUTION:The welded part of an outside plate 1 is heated by arc heat and is pushed out to the surrounding by the pressing force of an electrode rod 5 and the pressing force of compressed air from the hollow part of the rod 5, by which the plate 1 is disconnected from a frame 3. A hood 10 covers arc light to avoid damaging the operator's eyes. The spatter and smoke during arc generation are sucked and removed through the hood 10, by which the working environment is maintained without spoiled.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gold IME processing apparatus, and more specifically, a metal plate partially welded to a gold IA member is cut by melting around the welded part. This invention relates to a device for removing a member from a member.

Conventional) IJ construction and its problems The outer panels of railway vehicles, large special vehicles, etc. have a thickness of 1.6 to 3.
mm diameter is mainly used, and has a large number of welded parts between it and the frame part, but this is done by drilling 6 to 10 holes in the part of the outer plate that is to be welded. The carbon dioxide gas welding method is mainly used between J and the frame part.
i'a has been. When repairing the outer panels of vehicles, special automobiles, etc., it is necessary to remove all of these many welded parts.

This removal method involves pressing a hollow carbon electrode rod almost perpendicularly against the periphery of the welded part, applying a voltage between the two to pull up the electrode rod, and connecting it to the bath welded part. generating an arc in between to melt the periphery of the welded part,
Thereafter, the electrode rod is moved so as to be forced onto the Kiyokatsu i WIS, and at the same time, the hollow part of the electrode rod is used as a passage to suction and remove the molten metal around the welded part, and the periphery of the welded part is melted and cut. Proposed.

According to this method, the welded part can be separated from the surrounding skin in a very short time, and the molten metal can be removed by suction.
There is no risk of fire or damage to the work environment by scattering around. However, with this method, only the periphery of the welded portion is cut by fusing at t;1 as will be described later, and the welded portion remains as it is in one frame. This remaining part will be scraped off with a grinder tongue as a post-processing, but if the outer plate j ≠ force only, C1 labor LV / will not be applied. It costs a lot.

As the molten metal is sucked and removed through the hollow part of the electrode rod, the molten metal tends to land in the hollow part of the electrode (+) and the hollow part of the rod. The electrode rod is severely worn out because it is scraped off when it is sucked in. Since it sucks in high-temperature molten metal and hot air, it does not affect the durability of parts such as the electrode rod holder and rod. At the end of the work 11, 9, when removing the electrode rod stuck in the fusion section, the tip of the electrode rod is likely to be bent or chipped.

These problems become more pronounced as the metal plate becomes thicker.

Purpose of the Invention The present invention solves the above-mentioned problems and removes metal plates from welds in a very short time without requiring much effort on the part of the operator.
, 4 The purpose is to provide a device that can be removed.

l1f-j construction of the invention Invention CI1, a hollow carbon electrode rod is arranged almost perpendicularly to the metal plate, facing the periphery of the welded part of the metal plate, and an arc is generated between the electrode rod and the gold 11S plate. The welded part of the metal plate is melted by the arc heat, and the electrode rod is pressed against the molten gold part, and compressed gas is supplied to the inner 912 part and the outer peripheral part of the electrode rod. The structure is such that the molten metal is removed and the dust thus removed from the molten part is suctioned away using a hood placed around the electrode rod as a suction port.

That is, the device of the present invention includes a hollow one-inch movable rod having an electrode rod holder at its tip that holds a hollow electrode rod, a rod holding mechanism that holds the rod so as to be movable back and forth, and an i.
an elastic body that urges the rod forward; a slider that is biased forward to a fixed position by the elastic body and is movable back and forth; and a mechanism that engages the slider with the rod and moves it back together with the rod. , a mechanism for releasing the retaining relationship of the slider to the rod, a means for supplying nonflammable compressed gas to the tip and outer circumference of the electrode rod through the hollow part of the rod, and a mechanism for substantially sealing the circumference of the electrode rod. The device is equipped with a hood arranged therein, a suction means that uses the hood as suction 1, a kite that determines the reference position of the electrode rod, and a conductor that supplies current to the electrode rod via the rod.

According to the present invention, the welded portion of the outer plate is melted by arc heat and pushed out by the pressing force of the electrode rod and the pressing force of compressed air from the hollow part of the electrode rod, and the outer plate is attached to the frame. and belittled.

Therefore, as in the conventional example, there is hardly any residue left on the welded part and the inner surface of the electrode rod is not scraped, resulting in a long life and no chipping or breakage. In addition, the hood serves as a cover for shielding the arc light, preventing arc light from scattering during work and damaging the workers' eyes, and preventing spatter and smoke from being generated during arcing through the hood. Since it is removed by suction, it does not harm the working environment. Furthermore, since the work is carried out while spraying compressed air around the outer periphery of the electrode rod, the electrode rod is less likely to wear out (ideal peeling work can be performed in a short period of time).

DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows a block diagram of processing performed by a device called "Non-explosion". 1 is a skin plate welded to a frame 3 by a portion 2; 4 is i for cutting off the outer panel 1 from the frame 3.
・-Chi. The torch 4 holds a hollow carbon electrode rod 5 at its tip and has a conductive cable 6 for passing current through the electrode rod 6, and the conductive cable 6 is connected to the positive electrode of the electric gap arrangement 7.

The torch 4 further has a connection 8 connected to a control device built into the power supply 7 . A near compressor 9 is connected to the control device. Reference numeral 10 is a hood provided at the tip of the torch and also serves as a cover for transmitting the arc light, and a dust collection box 1 is used to collect excessive dust from the molten metal by a suction device 11 operated by an air conditioner nozzle 9.
It is connected to 2.

FIG. 2 shows an embodiment of the torch. Reference numeral 12 denotes a case made of insulating synthetic resin, which is approximately T-shaped, and has a downwardly protruding portion 13.
is the handle. 14/J, electrode rod body holding a hollow carbon electrode rod 6 at the tip], This is a single sliding rod consisting of a hollow conductive section provided with B15. 16.17 is a bushing that pivotally supports the ijJ moving rod 14, the bushing 16 is attached to the tip of the flange pipe 18 fixed to the front cylinder part of the case 12, and the bushing 17 is fixed to the rear of the case 71≦. It is attached to the cylinder case 19.

Reference numeral 20 denotes a guide for determining the reference position of the electric bucket rod, and is supported by a guide tube 21. The guide tube 21 is rotatably mounted on a protective tube 22 provided on the outer periphery of the cylindrical portion of the case.
and is fixed with screws 23.

The electrode holding part 1siL is made of a conductive material, and has a recess 24 at its tip into which the electrode rod 5 is fitted, and a hole 25 &
A plurality of holes 25b opening toward the outer circumference of the electrode rod 5 are provided around the electrode rod 5.

The light-shielding hood 10 is rotatably mounted on the guide tube 21, and the light-shielding hood 10 is rotatably attached to the guide tube 21, and the light-shielding hood 10 is rotatably mounted on the guide tube 21. It has a conduit 26 for connection with the box 12. 4. The tip of the hood 1o should be slightly rearward than the tip of the guide 20.

The cylinder case 19 is made of a highly conductive metal and closes one opening of the cylinder chamber 27 provided at the front. 29. 30
11 is a slider mounted in the cylinder chamber 27 so as to be freely movable back and forth. It is slidable relative to the movable rod 14, and is moved forward by a spring 31 until the front A^ (a) hits the end face of the adjusting screw 32. is being energized.

The lower part of the slider 30 has a cylinder chamber 33 that opens into the sliding portion of the movable rod 14, and a piston 36 having a friction body 34 at its tip is mounted therein. 36 is a bushing that supports the piston 35. slider 30
When the piston 35 moves forward, the friction body 34 at the tip presses against the movable rod 14 and restrains the movable rod, so that the slider 3° and the movable rod 14 are integrally connected.

The movable rod 14 has a stopper 37 on its tip side with a screw 3.
8, and a bolt 39 is installed between this stopper 37 and the rear part of the flange pipe 18. Therefore, the movable rod 14 is at the rear end of the stopper 37 or the bush 16. ! 'I/Koruu de 1); Being forced into J force. Further, the flange pipe 18 is provided with a uJ notch 40 at 315 minutes (corresponding to the screw 38), and the screw 38 is movable within the range of this lino notch 40, so that the movable rod 14 also has a concave shape. You can move back and forth without rotating.

Reference numeral 41 denotes a stopper with one part 1 inch open at the rear of the cylinder case 19, of which (ill) a conductive cable 6 housed in a 3° handle 13 forming an air chamber 42, and a plug for supplying compressed air. Leading, cass conduit 43, 44, 45iIJ: 1./
'1's rt is also coupled to the cylinder case 19.

The current supplied to the conductive cable 6 passes through the cylinder case 19, the flange tube 18, the leaf spring 47 attached to the tube 18 with a screw 46, the movable rod 14, and the electrode rod holder 16 to the electrode rod 6. Supplied.

Furthermore, the compressed air supplied to the gas conduit 43 is
The compressed gas enters the air chamber 42 through the rod 14, is ejected from the holes 26zL and 25b of the electrode rod holding part 16, and is eventually ejected from the inner and outer surfaces of the tip of the electrode rod. Air is supplied to the cylinder chamber 33 of the slider 30 to move the piston 35 forward.

Furthermore, it is supplied to the gas conduit 46! 1. The compressed air is supplied to the air chamber on the front side of the slider 30 in the cylinder chamber 27 and causes the slider 30 to retreat. 49 is a start switch for operating the control device.

Next, the operation of this torch will be explained with reference to FIG.

First, leave the electrode rod 6 in a state of protruding beyond the guide piece 20, bring the tip of the electrode rod into contact with the metal processing part, and press the torch with the tip of the kite 20 (corresponding to Rikokari 1). Fig. 4a). Next, when the start switch 49 is pressed, high pressure compressed air is supplied from the conduit 44 to the cylinder chamber 33, and the piston 36 moves forward to move the friction plate 34 i.
-+Press the slider 30 onto the J-motion rod 14 (!
:'i' It becomes integral with the J moving rod 14. At the same time, the power supply device 7 is turned on, and the current flows through the cable 6, the cylinder case 19, the temporary spring 47, the movable rod 14, and the electrode support 1.1.
It is guided to the electrode rod 5 through the part 16 and passed through the welded part 2 to the electrode rod 4.
'i-mail status is reached.

On the other hand, compressed air is supplied from the conduit 43 to the hollow part of the rod 14 through the passage 48 and the air chamber 42, and is ejected to the tip and outer circumference of the electrode rod 5. If this single edge is not 1 to 7/cI or less, the arc joint will be problematic.111. becomes.

Next, when all the air under pressure Pi is introduced into the cylinder chamber 27 from the conduit 45, the slider 30 is pulled up to the rear position. At this time, the electrode rod 5 is integrated with the slider 3o via the moving rod 14, and is pulled up as the stripe moves backward, creating a gap between it and the welded part. , an arc occurs here (Fig. 4b)
). In this state, the arc is maintained for a certain period of time to sufficiently melt the welded part, and then the high-pressure air introduced into the cylinder chamber 27 and moving the slider 30 backward is rapidly released. Due to the old force, the tip of the electrode rod pushes the molten metal outward with the air pressure ejected from the hollow part, and the electrode rod hits the frame 3, completing the work (Fig. 4C). Fourth
Figure d). At this point, power supply to the torch and supply of compressed air to the rod are stopped.

On the other hand, spatter and powder smoke during arc generation are removed from the hood 1o.
The dust is trapped in the dust collector 11 through the conductor 26 and collected into the dust collection box 12.

The series of operations described above are controlled by a control device built into the power supply device.

FIG. 6 schematically shows the principle of peeling off according to a conventional example. As is clear from the figure, in the conventional method,
There is a large amount of metal remaining, and when the electrode rod 5 is pulled up from the metal plate after the work is completed, it is difficult to separate the electrode rod 5, causing chipping or breakage. On the other hand, according to the present invention, after the welded portion is sufficiently melted by arc heat, the tip of the electrode rod is moved;
Since it is pushed outward by the pressure of the air ejected from the hollow part, there is hardly any residue left and no chips or breaks occur.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

1) Arc light and spatter do not fly and do not harm the eyes of workers or the working environment.

2) No skill is required and the work can be done in an extremely short 11-way distance.

3) The remaining part after peeling is small, after ripening 1111 to 11,
No need for provocation.

[Brief explanation of the drawing]

Figure 1 is a block diagram during processing by the apparatus of the present invention, Figure 2
The figure is a longitudinal sectional view showing an example of the structure of the torch, FIG. 3 is a sectional view taken along the line II' in FIG. FIG. 7 is a longitudinal cross-sectional view of curve i'i15 without showing the processing steps according to an example. 4...Torch, 6...Electrode rod, 6...
... Conductive cable, 9... Work 'no' compressor, 10... Hood, 11... Suction device, 12... Case, 14... i" Moving rod, 15... Electrode holding part, 19. Cylinder case, 2o... Kite, 30... Slider, 31.39... Weight Topomorphic body, 25&,
26b... Gas ejection hole, 35... Piston, 43... Waste conduit for supplying waste to the electrode rod, 44... Gas outlet for operating the piston 36. Waste conduit, 45... A waste conduit for operating the cylinder case 19. Name of agent: Patent attorney Toshikata Nakao and 1 other person No. 4
Figure (aL) ('b) /l 1 3?2 3do (C) (d,) (e) (C) (d,) (e-)? ?

Claims (1)

[Claims] a hollow co-moving rod provided with an electrode holding part that holds a hollow electrode at its tip, a rod holding mechanism that holds the rod so as to be movable back and forth, and r) an elastic body that urges the 1+ rod forward. A slider that can freely move back and forth and is urged forward to a fixed position by an elastic body, a mechanism that engages the slider with the rod and moves it back together with the rod, and an imaginary retention relationship between the rod of the slider. A means for supplying compressed waste to the tip and outer periphery of the electrode rod through the hollow part of the corner +1 divided by (1'4 and 1) 11 Rondo, and a hood arranged so as to substantially seal the periphery of the electrode rod. , a suction means using the hood as a suction port, a kite for determining the reference position of the electrode rod, and an electrode 5 through the rod.
A fully bendable processing device characterized by comprising: a conductor through which an electric current passes;