JPH04309456A - Gas welding device and nozzle device used therefor - Google Patents

Abstract

PURPOSE:To execute the automatic work even in the case of an especially narrow space at the time of executing a brazing work by a gas welding device 1. CONSTITUTION:In a gas welding device 1 formed by providing a nozzle device 2 supported by a suitable supporting member, and a brazing filler metal supply device 5 for supplying a linear brazing filler metal A, the nozzle device 2 constitutes a characteristic feature of a fact that the brazing filler metal A is supplied from the vicinity of a nozzle 13. Also, the nozzle device 2 constitutes a characteristic feature of a fact that a passing hole 21 of the brazing filler metal A is formed in a nozzle main body 10, and the nozzle 13 faces the tip side of this passing hole 21.

Description

[Detailed description of the invention]

0001

[Purpose of the invention]

[Field of Industrial Application] The present invention relates to a gas welding device for performing brazing work and a nozzle device used therein, and particularly to a compact device that can perform automatic work even in a narrow space. It is something.

0002

BACKGROUND OF THE INVENTION It is difficult to automatically perform brazing work at production sites for various mechanical parts unless there is a certain amount of work space around a nozzle device that spews out flames. In other words, conventional attempts to automate this type of work have mostly followed manual methods, as shown in Figure 7.
The nozzle portion and the brazing material are simply moved to a predetermined location automatically. Because the brazing material is supplied separately from a location far from the nozzle, if there is not enough space around the nozzle, it becomes difficult to apply the flame or brazing material to the workpiece, which ultimately makes the work impossible. be.

0003

[Technical matters attempted to be developed] The present invention was made in view of this background, and by developing a compact welding nozzle, this welding nozzle and further gas welding incorporating this welding nozzle were developed. This is an attempt to develop a new device that can automate brazing work even on narrow and precise workpieces.

0004

[Structure of the invention]

[Means for achieving the object] That is, a gas welding apparatus, which is the first invention according to the present application, comprises a nozzle device supported by a suitable support member and a linear brazing material supply device, and the nozzle device is connected to a crater. The feature is that the brazing material is supplied from nearby.

In addition to the above-mentioned requirements, the gas welding apparatus, which is the second invention of the present application, has the nozzle device supported by a manipulator that automatically moves according to the part to be machined, and the nozzle device has the temperature control of the workpiece. The present invention is characterized in that a heating state sensor is provided to detect the heating state, and a control device controls the brazing material supplying state of the brazing material supplying device based on information from the heating state sensor.

Furthermore, a gas welding nozzle device according to the third invention of the present application is characterized in that a passage hole for the brazing metal is formed in the nozzle body, and a crater faces the tip side of the passage hole. It is what it is.

Furthermore, a gas welding nozzle device according to a fourth aspect of the present application is characterized in that, in addition to meeting the above-mentioned requirements, the nozzle is formed around a passage hole for the brazing material. These inventions attempt to achieve the above object.

[0008]

[Operation of the invention] According to the present invention, since the brazing material is supplied from the vicinity of the crater, brazing work can be performed in a narrow space with enough space for the nozzle device to approach. . In other words, the workpiece is heated by the flame emitted from the nozzle main body, and the brazing material that was waiting in a non-projecting state at that point is sent forward, reaches the welding point, melts it, and brazes the workpiece at a predetermined position. This is what we do.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically explained below based on the illustrated embodiments. Reference numeral 1 schematically shows a gas welding apparatus according to the present invention, which includes a nozzle apparatus 2 that performs substantial brazing work, a manipulator 3 that is a support member of this nozzle apparatus 2, and a nozzle apparatus 2. The brazing material supplying device 5 sends out the brazing material, and further detects the temperature of the workpiece W and other conditions, and detects the temperature and other conditions of the workpiece W.
Alternatively, it includes a control device 6 that controls the amount of gas to be supplied.

[0010] Below, each member will be explained in detail. First, the nozzle body 10 is a nozzle block 11 in this embodiment.
and a core metal 12 are combined. First, in the nozzle block 11, a gas introduction chamber 14, which is a conical space, for example, is formed inside the nozzle block 11 on the side of the crater 13 at its tip, and a substantially female screw is connected to the gas supplying member from the outside. A pipe connection portion 15 formed by engraving is bored. A female thread 16 for holding down the core metal is formed on the side opposite to the crater 13, and a cylindrical bolt 17 for holding down the core metal is screwed into this portion to hold the core metal 12 in an assembled state. Further, a locking inner flange 18 is formed between the core metal holding female thread 16 and the gas introduction chamber 14 so as to partition the space.

On the other hand, the core metal 12 is provided with a plurality of discharge slits 20 around the tip side for substantially forming the crater 13. In this embodiment, as an example, the gas discharge slits 20 forming the crater 13 are provided. The slit 20 is formed in a slightly spirally deflected state. Furthermore, a brazing material passage hole 21 is provided in the center of the core metal 12, and as a characteristic feature of the present invention, the crater 13 and the brazing material passage hole 2 are provided at the center of the core metal 12.
1 are located close to each other. Also, the core metal 12
A large diameter portion 22 is formed in the center of the nozzle block 11, and this portion is adjusted so as to come into contact with the locking inner flange 18 of the nozzle block 11 in the assembled state. Note that a packing 23 is provided on the supply source side of the brazing material passage hole 21 of the core bar 12.

Furthermore, it is preferable to provide a heating status sensor 25 for the nozzle body 10, and this heating status sensor 25 senses the local temperature of the workpiece W warmed by the flame F emitted from the crater 13. Further, the nozzle body 10 is provided with a gas pipe 27 for supplying a mixed gas such as oxygen and propane gas or oxygen and acetylene gas to generate the flame F. This gas is supplied in a mixed state during the process, and although detailed illustration is omitted, it is supplied from a gas control unit 28 that includes a gas cylinder, a controllable protrusion valve, and the like.

The nozzle device 2 is supported by a manipulator 3, which is an articulated robot, and is configured to face an appropriate work location. Furthermore, this nozzle device 2
Regarding the brazing material supply device 5 that supplies the brazing material A to the brazing material, this device has a brazing material coil 30 and a brazing material feed roll 31 as its main components, which are controlled by a pulse motor or the like as appropriate. In response to a signal from the device 6, the brazing material A is sent out in the required amount and at the required timing to perform the brazing work.

The present invention has the configuration as described above, and operates as follows to perform brazing work, which is a method of gas welding. First, work procedures and the like are stored in a microcomputer or the like according to the workpiece W as appropriate, and the operating status of the manipulator 3 is instructed. In this state, the nozzle device 2 is first placed in front of the workpiece W at the position where the brazing operation is to be performed first, and then gas is supplied from the gas control section 28 to the nozzle body through the gas pipe 27. In such a case, the gas pipe 27 is in communication with the gas introduction chamber 14, so it is filled with gas, and furthermore, gas is ejected from the gas discharge slit 20, which essentially constitutes the crater 13, and at that point When ignited, it becomes a flame F and heats a predetermined position of the workpiece W to an appropriate range of several hundred degrees Celsius.

When the heating status sensor 25 detects that the workpiece W has reached a predetermined temperature, the brazing material supply device 5
A control signal from the control device 6 is sent to the brazing material coil 3.
The brazing material A is pulled out to a predetermined size by a brazing material feed roll 31 from zero and is supplied to a predetermined position. The heating status sensor 25 may not only detect the temperature, but may also be one that directly images the heated portion of the workpiece W using a micro camera and provides an instruction signal depending on the status. Particularly in the case of brazing work, since the flow of the wax is important, such a direct viewing type sensor is preferable.

On the other hand, the brazing material A is heated by the flame F and becomes almost molten, and when it comes into contact with the heated position of the workpiece W, it melts instantaneously.
This aims at fixing the parts of the workpiece W to be connected while keeping it in an unmolten state. Incidentally, as the brazing material A used here, any suitable brazing material for use at low temperatures to high temperatures can be used. still,
In the embodiment described above, a gas release slit 20 serving as a crater 13 is provided around the brazing material passage hole 21 for supplying the brazing material A.
is formed, and the flame F is emitted in a state surrounding the brazing material A, so to speak. However, the point is that the nozzle body 10, which is compact, only needs to be provided with the vent 13 and the brazing material passage hole 21 close to each other. For example, as shown schematically in FIG. 6, only one hole may be formed as the crater 13.

Furthermore, in the above embodiment of the present invention, the nozzle device is used in an automated machine, but the nozzle device itself may be of a hand-held type. In short, it is of course possible to make appropriate changes in design and structure within the scope of the purpose of the present invention.

[0018]

[Effects of the Invention] As described above, the present invention provides a nozzle body 1.
Since the crater 13 and the brazing material passage hole 21 are formed relative to the crater 13, the brazing material A is supplied from near the crater 13, making it possible to approach the workpiece W even in a narrow working environment. This makes it possible to automate even precise machining processes.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a gas welding device and a nozzle device of the present invention.

FIG. 2 is an explanatory diagram showing the relationship of each member constituting the gas welding apparatus of the present invention.

FIG. 3 is an enlarged exploded perspective view of the nozzle device of the present invention.

FIG. 4 is a vertical sectional side view of the same as above.

FIG. 5 is a front view of the same as above.

FIG. 6 is a skeletal longitudinal sectional view showing another embodiment of the nozzle device of the present invention.

FIG. 7 is an explanatory diagram showing a conventional brazing work method.

[Explanation of symbols]

1 Gas welding equipment 2 Nozzle device 3 Manipulator 5　　　　　　Brazing material supply device 6 Control device 10 Nozzle body 11 Nozzle block 12 Core metal 13 Crater 14 Gas introduction chamber 15 Piping connection 16 Female thread for holding the core metal 17 Cylinder bolt for holding core metal 18 Inner flange for locking 20 Gas release slit 21　　　　Brazing material passage hole 22 Large diameter part 23 Packing 25 Heating status sensor 27 Gas piping 28 Gas control section 30　　　　　Brazing material coil 31　　　　　Brazing material feed roll A　　　　　　Brazing material F Flame W Work

Claims (4)

[Claims] 1. A gas welding device comprising a nozzle device supported by a suitable support member and a linear brazing material supply device, wherein the nozzle device is supplied with brazing material from near a crater. . 2. The nozzle device is supported by a manipulator that automatically moves according to the processing area, and
A claim characterized in that the nozzle device is provided with a heating status sensor that detects the temperature of the workpiece, and a control device further controls the brazing material supplying state of the brazing material supplying device based on information from the heating status sensor. The gas welding device according to item 1. 3. A nozzle device for gas welding, characterized in that a passage hole for a brazing metal is formed in the nozzle body, and a crater faces the tip side of the passage hole. 4. The gas welding nozzle device according to claim 3, wherein the nozzle is formed around a passage hole for the brazing material.