KR19990015163A - Double Torch Gas Brazing Robot System - Google Patents

Abstract

The present invention relates to a gas brazing robot, and more particularly, to a double torch type gas brazing robot system having two torches.

The present invention provides a robot for gas brazing using a double torch provided with two torch lamps to simultaneously join two adjacent places such as a door frame of a vehicle and a connection part of a door panel, and the like. It aims to save time and improve productivity.

The present invention provides a brazing robot system, comprising: a main heat torch lamp for igniting gas supplied from a gas mixing device to heat the object to be bonded; Sliding reciprocating between the main heat torch lamp and the preheating torch lamp, and initially supplying brazing wire to the front end of the main torch lamp and brazing the end of the preheating torch lamp side after brazing of the main torch lamp side. It provides a double torch-type gas brazing robot system comprising a brazing wire supply mechanism for supplying a wire; and a sliding shelf for installing the brazing wire supply mechanism and the reciprocating sliding movement on the cross rail.

Description

Double Torch Gas Brazing Robot System

The present invention relates to a gas brazing robot, and more particularly, to a double torch type gas brazing robot system having two torches.

The present invention provides a double torch-type gas welding robot having two torch lamps for simultaneously joining two adjacent places, such as a door frame of a vehicle and a connection part of a door panel, so that manpower and time required for assembly of a vehicle and the like. It aims to save money and improve productivity.

In the past, when assembling a car body such as a car, a manual worker often performs gas brazing for bonding with oxygen acetylene mixed gas, but recently, work is performed by using a robot system to improve productivity. It can improve the efficiency of workers and ensure the safety of workers.

An example of this is a gas brazing robot system filed by Applicant as patent application 37092 on October 25, 1995.

According to the above invention to solve the problems caused by the operator to work directly for the gas brazing, the purpose of assembling the state of the weld uniformly and satisfactorily it is possible to perform brazing by sensing the appropriate preheating and the temperature of the base metal In order to provide a gas brazing robot system, a torch lamp which flows from side to side by a driving motor to ignite, extinguish and braze is installed, and at the same time, the brazing wire for gas brazing is automatically supplied. A robot for gas brazing was provided to include a wire forward and backward device (supply device) for enabling the movement of the furnace to automatically perform brazing.

By providing the gas brazing robot system described above, the automation has been expanded in the production of automobiles, etc., and thus the productivity has been improved.

However, if it is necessary to braze as many places as possible at the same time, the effect of automation is halved in the case of FIG. 1, and the control is complicated as well as the operation of gas brazing requires preheating. This results in a delay in production speed and productivity deterioration by the time required for preheating.

Such a problem may require many robotic systems, but it is not possible to install a lot of expensive robotic systems in reality. Therefore, development of a robotic system to solve the above-mentioned problems has been required.

The present invention is to overcome the limitation that the above-described conventional gas brazing robot system can not braze several places at the same time, by installing two torch lamps, at the same time to start heating two places and one torch lamp while the other One torch lamp has a technical problem to provide a double torch type gas brazing robot system that can be preheated to reduce the time required for preheating.

1 is a view showing an example of a brazing part to which the double torch type gas brazing robot system according to the present invention is applied.

Figure 2 is a schematic overall configuration diagram of a double torch type gas brazing robot system according to the present invention,

3 is a plan view of a double torch type gas brazing robot system according to the present invention,

Figure 4 is a side view of a double torch type gas brazing robot system according to the present invention

5A is a rear view of a double torch type gas brazing robot system according to the present invention, in which a part of brazing is finished and the other part is brazing;

Figure 5b is a rear view of the double torch-type gas brazing robot system according to the present invention, a part showing the other part of the preheating state during brazing,

6 is a view showing an ignition mechanism of the brazing robot according to the present invention;

7 is a perspective view of a double torch-type gas brazing robot system according to the present invention, a part showing a state in which the other part is warming up during brazing;

8 is a perspective view of a double torch type gas brazing robot system according to the present invention, a part of which is finished brazing and the other part is brazing;

9 is a piping diagram of a double torch-type gas brazing robot system according to the present invention.

Explanation of symbols on the main parts of the drawing

2,3: Simultaneous welding part 4: Tool stand

5: heat torch 6: preheat torch

7: Brazing wire supply mechanism 8: Mixer

9: Flashback Arrestor 10: Gas Flux Tank

11: Gas control box 12: Electronic control box

13: Temperature detection sensor 14: Thermal flame detection sensor

15: Preheat flame detection sensor 16: Brazing wire

17: Brazing wire feeder 18: Cylinder

19: Cooler 20: Gas distributor

21: combustion pipe 23: sliding shelf

24: Moving rail 25: Vibration motor

26,26 ': oxygen tank 27,27': acetylene tank

28,29: Regulator 30: Filter

31: compensation tank 32: pressure detection gauge

33: compressor switch 34: solenoid valve

35: Secondary regulator 36: Digital gauge

37: flowmeter 38: filter

39: Solenoid valve 40: Flux tank

41,42: Flashback arrestor 43: Mixer

44: ignition coil 45: ignition detection sensor

46: Ignition burner

As a means for solving the above technical problem, the present invention is a brazing robot system having an oxygen tank, an acetylene tank, a gas mixing device, an electronic control mechanism, and a ignition mechanism, the supply from the gas mixing device A heat torch lamp for igniting the gas to heat the brazing object; a preheat torch lamp for igniting the gas supplied from the gas mixing device with the heat torch at the same time to apply heat to the brazing object; the heat torch lamp and the preheating A brazing wire supply mechanism for sliding reciprocating between the torch lamps and initially supplying brazing wires to the front end of the main torch lamp side and supplying brazing wires to the end of the preheating torch lamp side after the brazing of the main torch lamp side; Sliding lathe for wire reciprocating sliding on rails with wire feed mechanism And; a driving mechanism for reciprocating the sliding shelf; and a main flame detection sensor mounted on the sliding shelf to detect ignition of the main heat torch lamp; and installed on the sliding shelf of the preheating torch lamp. It provides a double torch-type gas brazing robot system comprising a pre-heat flame detection sensor for detecting the ignition; and a temperature detection sensor installed on the sliding shelf to measure the temperature of the torch lamp brazing.

Preferably, the main heat torch lamp is a main heat torch lamp which is automatically extinguished after brazing in the main heat torch lamp, and the preheat torch lamp is a preheat torch lamp that heats the brazing object to a temperature lower than the temperature at the time of brazing during preheating. Provided is a double torch-type gas brazing robot system.

More preferably, the main torch lamp and the preheating torch lamp are vibrated to the left and right by a vibrating motor located at the rear side, and the double torch type is characterized in that the main torch lamp and the preheating torch to inject a flame to the brazing target. Provide a gas brazing robot system.

In addition, the main heat torch lamp and the preheat torch lamp provides a double torch-type gas brazing robot system, characterized in that each of the main heat torch lamp and the preheat torch lamp to receive the mixed fuel gas from an independent gas tank.

Hereinafter, the configuration and operation state of a double torch type gas brazing robot system according to the present invention will be described with reference to the accompanying drawings.

2 and 3, the double torch-type gas brazing robot system of the present invention is configured to include two torch lamps, one of the two torch lamps is a torch lamp 5 for brazing and the other One is a preheat torch lamp 6 which preheats before full brazing.

In general, the two torch lamps 5 and 6 start to heat the base material together, and if the temperature of the heat torch lamp exceeds a certain degree, brazing is performed by the heat torch lamp 5 and then the brazing of the heat torch lamp is performed. During this finish, the preheat torch lamp 6 preheats the brazing portion of the base material.

After the brazing by the main heat torch lamp is completed, the fuel gas supply to the main heat torch lamp is stopped, and the base material is brazed by the flame of the preheat torch lamp 6.

On the other hand, in order to evenly heat the brazing portion of the base material during the brazing heating to the vibration motor 25 for vibrating the torch lamp (5) 6 to the left and right separately to the position shown in FIG.

In addition, since the brazing is performed by the preheating torch lamp after the brazing is performed by the heat torch lamp, it is preferable to set the initial temperature of the preheating torch lamp to be lower than the temperature of the heat torch lamp.

The start of brazing is started when the temperature of the base material reaches a certain degree, which is detected by the temperature detection sensor 13.

The temperature detection sensor 13 is fixed to the sliding shelf 23 reciprocating on the horizontal moving rail 24 to measure the temperature of the torch lamp being brazed, and the control unit in the electronic control box 12 detects the temperature. Observe the output value of the sensor and start brazing when the temperature of the heating part reaches a certain value.

On the other hand, in addition to the temperature detection sensor 13, the main flame detection sensor 14 is installed on the slide to check the flame state of the torch lamp currently being brazed in the main heat torch lamp 5 or the preheating torch lamp 6, and also preheat flame. Winding sensor 15 is installed to check the flame state of the preheat torch lamp (6).

In addition, the sliding shelf 23 is provided with a brazing wire supply mechanism (7) which is fixed and moves together, and the brazing wire (16) moves to the tip of the torch lamp when brazing so that brazing is performed.

That is, when the temperature of the current heating part reaches the reference level (820 to 870 degrees), the control unit in the electronic control box 12 determines this and operates the piston 18 to position the brazing wire supply mechanism at the tip of the torch lamp. As a result, the wire feed mechanism pushes the brazing wire to the tip of the torch lamp to perform brazing.

On the other hand, since the brazing wire supply mechanism is moved according to the sliding shelf 23, if the current brazing wire end is located in the heat torch lamp 5, the brazing wire supply unit brazes in the heat unit and then moves to the preheat torch lamp part 6. Continue brazing.

The sliding shelf 23 is installed to engage with the rail on the rail 24 installed on the work table 4, and installs various sensors 13, 14, 15 and the brazing wire supply device 7 on the shelf.

At this time, the position of the sliding shelf is determined so that the brazing wire supply mechanism 7 is located at the torch lamp which is currently brazing, and thus continues the reciprocation from side to side.

Figures 5a and 5b is a view showing the state of such a reciprocating motion, Figure 5b is the initial position and the flame is coming out of the heat torch lamp is brazing, while in the preheat torch lamp flame is ejected and preheat the base material to be brazed soon after 5A shows a state in which brazing is performed by the preheating torch lamp after the brazing of the main heat torch lamp.

7 and 8 illustrate such a state, FIG. 7 corresponds to FIG. 5B so that the main heat torch lamp 5 is brazing and the preheating torch lamp 6 indicates a preheating state. In the case of 5a, the main heat torch lamp 5 is stopped, and only the preheat torch lamp 6 is emitting a flame and is brazing.

FIG. 6 illustrates an ignition mechanism for igniting each torch lamp, and is configured to include a fire detection sensor 45 and an ignition coil 44.

Next, a circuit for generating and supplying the mixed fuel gas of the double torch-type gas brazing robot system according to the present invention will be described with reference to FIGS. 2 and 9.

The brazing combustion fuel used in the present invention is an oxygen-acetylene mixed gas, and the acetylene gas controlled in the gas control box 11 is a flux tank in which a solvent is embedded to prevent oxidization when the mixed gas is melted and the wire is melted. 10), the mixed gas of acetylene and flux solvent from the flux tank is properly mixed with oxygen in the gas mixer 8 to pass the gas distributor 20 and the combustion pipe 21 at the tip of the torch lamp shown in FIG. After cooling in the cooler 19 is injected through the tip.

The gas injected to the tip is ignited by the ignition device (FIG. 6) ignited by the LPG gas and the oxygen combined gas to heat the brazing base material.

The circuit inside the gas control box of FIG. 2 shown in detail in FIG. 9 will be described.

In the circuit of Fig. 9, the gas paths to the main heat torch lamp 5 and the preheat torch lamp 6 are independent of each other, and the respective oxygen tanks 26, 26 'and the respective acetylene tanks 27, 27 ') Is supplied to the torch lamp through individual control.

Pressure regulators 28 and 29 are installed to block the oxygen gas and acetylene gas supplied at an excessive pressure and are evenly input, and the gas is filtered by the filter 30 and the secondary pressure regulator 35 in the compensation tank 31. When the solenoid valve is opened because all the solenoid valves are opened by controlling the solenoid valves 34 and 39, which are the control valves, the gas in the compensation tank is moved in the direction of the torch lamp. Spills.

At this time, the pressure gauge 32, the digital gauge 36, and the flow meter 37 to check the current flow rate or pressure.

Unlike high pressure oxygen, acetylene gas neutralizes the flame during combustion, passes through the flux tank 40 to prevent fluidity of the material and surface oxidation of the panel during brazing operation, and backfire occurs due to wear of parts. If there is a risk of explosion, the flashback arrestor (41, 42) is to be placed.

The gas discharged from the gas tank to the torch lamp while being controlled in this configuration is mixed in a suitable ratio in the gas mixer 43, discharged to the torch lamps 5 and 6, and ignited to be fuel for brazing.

By providing the double torch type gas brazing robot system of the above-described configuration, it is possible to braze by heating several places at the same time with two torch lamps, so that one torch lamp is preheated while the other torch lamp is brazing. Since the time required for preheating can be reduced as much as possible, it contributed to the improvement of productivity, such as shortening the production time.

Claims (6)

A gas brazing robot system comprising an oxygen tank, an acetylene tank, a gas mixing device, an electronic control mechanism, and a ignition mechanism, wherein the heat torch ignites the gas supplied from the gas mixing device and applies heat to the brazing target. A preheating torch lamp for heating the brazing object by simultaneously igniting the gas supplied from the gas mixing device with the main heat torch lamp; and a sliding reciprocating motion between the main heat torch lamp and the preheating torch lamp, and initially the main heat torch lamp. A brazing wire supplying device for supplying brazing wire to the end of the side and brazing wire to the end of the preheating torch lamp side when the brazing wire of the heat torch lamp side is finished; and the brazing wire supplying mechanism is installed and reciprocally slides on the rail. A sliding shelf for moving; a driving mechanism for reciprocating the sliding shelf Double-torch-type gas brazing robot system comprising. The preheat flame detection sensor according to claim 1, further comprising: a main flame detection sensor installed on the slide shelf and detecting whether to ignite the main heat torch lamp; and a preheat flame detection sensor installed on the slide shelf and detecting whether or not to ignite the preheat torch lamp. And a double torch type gas brazing robot system installed on the sliding shelf, further comprising a temperature detection sensor measuring a temperature of the torch lamp being brazed. According to claim 1 or 2, The heat torch lamp is a heat torch lamp which is automatically extinguished after brazing in the heat torch lamp, the preheat torch lamp is brazing target at a temperature lower than the temperature at the time of brazing during preheating. Double torch type gas brazing robot system, characterized in that the heating preheating torch lamp The double heat torch lamp of claim 1 or 2, wherein the main heat torch lamp and the preheating torch lamp are vibrating to the left and right by vibrating motors positioned at the rear side and spraying the flame to the brazing target. Torch Gas Brazing Robot System The double torch type gas brazing robot system according to claim 1, wherein the main heat torch lamp and the preheat torch lamp are respectively a main heat torch lamp and a preheat torch lamp supplied with a mixed fuel gas along an independent path from an independent gas tank. The double torch-type gas brazing robot system according to claim 1 or 2, wherein the heat torch lamp and the preheat torch lamp are a heat torch lamp and a preheat torch lamp used for brazing the front door panel of the vehicle.