JPS58154462A - Method and apparatus for collecting welding fume - Google Patents

Abstract

PURPOSE:To collect welding fume efficiently and economically, by receiving the light of welding by a light sensor to detects the light source, and moving a dust collecting duct having a hood of a dust collector to the spot of welding by controlling a driving machine. CONSTITUTION:A duct 2 provided with a duct collecting hood 3 is attached to the stand 1a of the body 1 of a dust collector. It is made movable right and left through a driving member 4 and movable foreward and backward through a link 13 that suspends the duct by a hanging device 14 by a driving machine 5. Plural light sensors 6... are disposed laterally in a line on the upper edge of the stand 1a, and plural light sensors 6'... are attached to the hood 3 in a line in the direction of moving of the hood 3 to receive light generated by welding. A light sensor that received light most strongly is discriminated, and the dust collecting hood 3 is moved to the light source of welding by controlling the driving machine 5 by a controller 7. Efficiency of search of welding source can be increased by combined use of plural heat sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for efficiently collecting fumes generated during welding.

It is well known that welding fume is a fine dust that causes health problems. Therefore, various dust collectors for sucking welding fume as described below have been developed and are commercially available.

That is, if welding fume is collected near the source,
It can be collected sufficiently with an air flow rate of 1 to 2 m'/min, so it can be used, for example, to attach a dust suction hood to a protective mask for welding,
A carbon dioxide gas welding machine with a dust suction hood attached to the torch has been developed, but...:'1 If the suction is too close to the welding part, it may cause welding defects, and above all, it is important to use a dust suction hose. Attach it to a torch,
Attaching it to a mask is not easy to work with and places a heavy burden on the worker, a problem that has not been seen before.

Therefore, dust suction hoods that can be moved freely have been developed. The welding fume should be placed about 30CR1 away from the welding surface with an ff1l of about 5 to 10 It'/l1in.
This amount of air can be suctioned with low static pressure compared to the above-mentioned small air volume that requires high static pressure, so there is a big difference in energy compared to the above-mentioned one. Therefore, this movable hood can obtain a dust collection effect substantially equivalent to that of the above-mentioned method in which the hood is fixed to the mask or torch.

However, even with this 6 type, it may be good if the work is fixed or the welding work is carried out within an extremely narrow range, but if the welding range is wide, it becomes necessary to move the hood, which worsens work efficiency. was there.

In addition, a device has been developed in which a dust suction hood is attached to the entire workplace so as to exert a suction effect on the entire workplace. According to this method, there is no need to move the hood, so the workability is very good. However, in this method, the amount of air required for one welding fume source is hundreds to thousands of times higher than that required in the case of the above-mentioned method. There is a problem. In short, even if the amount of dust generated is the same, if the air volume increases, the equipment and operating energy (X-) will increase proportionally, so the initial running cost will also become large, and although health may be protected, economic efficiency will be affected. There was a problem that was missing.

SUMMARY OF THE INVENTION The present invention is a method and apparatus for collecting dust from a welding fume developed in view of the above-mentioned points, and its purpose is to:
When collecting dust from welding fume, a light sensor captures the light generated during welding, and a hooded dust suction duct for sucking fume is automatically moved to the welding area, eliminating the need for conventional dust collectors with large airflow. The main feature is that the dust collector has a small air volume, that is, it is designed to be able to collect dust with one suction 11t-1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1st Embodiment In FIGS. 1 and 2, 1 is a dust collector body with a built-in filter (4) and a dust suction fan (both not shown), and 2 is a dust collector body with its root end connected to the dust collector body 1. A duct is rotatably mounted on a support base 1a provided at the front, and 3 is a hood for collecting dust attached to the tip of the duct 2.Fume generated by welding is sucked by the hood 3, and the duct 2 is The dust passes through the dust collector body 1 and is sucked into the dust collector body 1. 4 is a drive member attached to the root end of the duct 2;
When the drive unit 5 rotates, the duct 2 rotates around the root end.
The tip hood 3 side of the hood 3 is designed to be rotated in either the left or right direction as shown by the arrow in Figure 2.
The attached duct 2 is designed to be easily rotated manually.

Next, in order to catch the light of welding being performed within the working range, 6... are placed in a row horizontally in the direction of rotation of the duct 2 on the front surface of the support stand 1a, and at appropriate intervals. Shows the optical sensor installed in the open space. These optical sensors-6...
... receives the light of welding work within the working range, that is, within the rotating range of the duct 2, but one of the optical sensors near the light source receives the light more strongly than the other optical sensors. In the present invention, the optical sensor 6 that has received the welding light most intensely is determined, and the controller, generally indicated by reference numeral 7, controls the drive unit 5 according to the determination result. The structure is such that the tactile actuator 2 and the hood 3 are rotated into the area of the strongest optical sensor 6, that is, where welding is being performed, to suck up dust from the welding fume.

To explain the above operation in more detail according to the block diagram shown in FIG. 3, in the figure, 68 to 6n are optical sensors, and 8
9 is a sensor number designation/allocation circuit for maximum light reception input; 10 is a phase difference determination circuit; 11 is a drive motor of the drive unit 5; 12 is a hood 3, that is, detects the current position of the drive motor 11. This circuit supplies this detection signal to the phase difference discrimination circuit 10, and as shown in the figure, the optical sensors 6a to 6n are connected to OV, IV, 2V=...(
n-1) When set to V, for example, if the current position of the hood 3 is at the optical sensor -61b, that is, at 1V,
If it is determined that the optical sensor 7--6f has received the strongest light due to a new welding operation, the voltage will be 5V, so the phase difference determination circuit 10 will determine the difference between 1V and 5V, that is, 4V, and only this 4V will be applied to the drive motor 11. can be rotated in the forward direction, and the duct 2 and hood 3 can be rotated to a position at the light source, that is, the welding location, to suck out dust from the welding fume.

Conversely, depending on the current position of the hood 3 and the positional relationship of the optical sensor that received the strongest welding light, the drive motor 11 may also be rotated in the negative direction.

Second Embodiment In the first embodiment described above, the duct 2 with the hood 3 attached is configured to move laterally with respect to the dust collector main body 1, but in this second embodiment, the duct 2 with the hood 3 attached is The duct 2 is moved in the front-rear direction of the dust collector body 1 to collect dust from the welding fume.

In order to achieve the above object, in this second embodiment, the duct 2 is constructed using a bendable member, and the duct 2 is moved by the drive R5. The dust collector body 1 is suspended from the link device 13 which can be freely bent in the front-rear direction using the hanging shells 14, and a plurality of optical sensors 6' are attached to the foot 3 of the hood 3. The dust collectors are arranged in a row in the moving direction, that is, in the front-rear direction of the dust collector main body 1.

Therefore, according to the second embodiment, similarly to the first embodiment, the optical sensor 6' detects the source of the welding light, and based on this, the controller 7 controls the drive unit 5 to By moving the hood 3 in the front-rear direction of the dust collector main body 1, the hood 3 can be positioned at the center of the light source and can collect dust from the welding fume.

Third Embodiment The third embodiment is a combination of the first embodiment and the second embodiment, and is controlled by the controller 7 according to the light received by the optical sensors 6 and 6'. The driving machine 5 moves the hood 3 in the left-right and front-back directions of the main body 1 of the east W11, thereby positioning the node 3 at the center of the light source and sucking dust. According to the embodiment, there is an advantage that the movement range of the hood 3, that is, the welding work range can be widened.

In the illustrated embodiment, the duct 2 to which the hood 3 is attached is rotated left and right by the drive 15, or the link device 13 is used to bend and stretch the duct 2 back and forth to move the τ node 3. The hood 2 is made of a flexible hose, and the hood 3 attached to the end of this hose is suspended from a drive unit 5 configured to move along a rail like a traveling lane, so that the hood 3 is moved to a light source. It may be configured as follows.

In addition, in the first to third embodiments described above, the optical sensor 6.
The drive 1fi5 is controlled by ... or 6'..., and multiple heat-sensitive sensors (not shown) are installed at the same position as the optical sensor 6 or 6' to sense the heat of welding. , these optical sensors and thermal sensors work together to drive the drive unit 5.
In some cases, the control is performed.

When light and heat sensors are used in this way, the welding source is first caught by the light sensor 6 or 6' and the hooded dust suction duct is moved toward the welding source to some extent, and then the heat sensitive sensor is used to catch the welding source. It is configured to search for a welding source.

According to the present invention as described above, when welding starts within the working range, the optical sensor catches this welding light and the drive machine controlled by the controller moves the hood of the duct to the light source, that is, the welding work area. Because it can automatically move to the welding fume and vacuum the welding fume, it is compared to the conventional dust collection method, which involves moving the dust collection hood to the welding area or attaching the hood to a torch or mask. This makes it possible to improve workability, and it is also economical in that a dust collector with a small air volume can sufficiently collect dust from welding fumes.It is a breakthrough in terms of both health and economy. It is something.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a side view, FIG. 2 being a plan view, and FIG. 3 being a block diagram of a control mechanism. □・１ １．．Dust collector body, ２．．Duct, ３．．．
Hood, 5...Driver, 6.6'...Light sensor, 7...Controller. Patent applicant Amano Co., Ltd.

Claims (5)

[Claims] (1) Light generated by welding is received by multiple optical sensors, and among these optical sensors, the optical sensor that receives the welding light most strongly is determined, and the drive machine is controlled based on the determination result. 1. A method for installing a welding fume in an arbor, comprising: moving a hooded dust suction duct of a dust collector to a light source. (2) The welding fume according to claim 1, wherein the plurality of optical sensors control the driving machine in cooperation with a plurality of heat-sensitive sensors that sense the heat of welding. How to collect dust. (3) The hooded dust suction duct attached to the dust collector body is configured so that it can be moved laterally to the left and right with respect to the dust collector body by a drive machine, and on the side of the dust collector body there are multiple ducts that receive light generated by welding work. The optical sensors are installed in a line horizontally facing the moving direction of the dust suction duct, and the driving machine for the dust suction duct is equipped with a sensor that determines the optical sensor that receives the welding light most intensely, and the result of this determination. A dust collection device for a welding fume, characterized in that a controller is installed that can move the above-mentioned hooded dust suction duct toward a light source by controlling a drive machine according to the above. (4) Attach the dust suction duct with a hood to the dust collector body.
The hood is configured to be able to move forward and backward, that is, toward and away from the main body of the dust collector, by means of a drive machine, and a plurality of optical sensors are installed in the hood to receive light generated during welding work. In addition to being installed in a line in the moving direction, the drive machine for the dust suction duct has a light sensor that determines which light sensor receives the most intense welding light, and controls the drive machine according to the result of this discrimination to make it the light source. A dust collector for a welding fume, characterized in that a controller is attached to which the hooded dust suction duct can be moved towards the target. (5) the plurality of optical sensors control the driving machine in cooperation with a plurality of heat-sensitive sensors that sense the heat of welding attached to the dust collector body or hood in the same way as the optical sensors;
Accordingly, the welding fume collection unit as set forth in Claims 3 and 4 is characterized in that the hooded dust suction duct is moved to the welding work source.