KR20050011903A - Apparatus for checking welding real time with eyeglasses type - Google Patents

Abstract

PURPOSE: Provided is a glass-type inspecting device for rear-time inspecting a welding state during laser welding or general welding, to protect user's eyes from strong light, such as flashlight or plasma, generated during weld. CONSTITUTION: The inspecting device includes an auxiliary flashlight interceptive plate(10), two safety goggles(20,30) for inspecting the welded portion, and an open/close control unit. The safety goggles have two safety glasses, a magnifying glass, a filter lens, and a liquid crystal shutter, which engage to both sides of the flashlight interceptive plate and magnify the welding portion for intercepting a harmful wavelength. The open/close control unit for opening/closing the safety goggles includes a trigger switch, an electric source, a microprocessor, a welding pulse signal generator, an oscillation electric source, and a shutter synchronous operate electric source.

Description

Real-time welding confirmation device with glasses type {APPARATUS FOR CHECKING WELDING REAL TIME WITH EYEGLASSES TYPE}

The present invention relates to an eyeglass type welding confirmation device capable of confirming a welding part in real time, for example, in a laser welding apparatus or a spot welding machine, and more particularly, to attach a welding confirmation device to a face. Eyeglasses are formed in the shape of glasses that can be used for precision welding while visually checking the welded part in real time while protecting the eyes from the strong light such as flash and plasma generated during laser welding or spot welding. It relates to a real-time welding confirmation device having.

In general, there are many welding methods, but in recent years, welding using a laser instead of spot welding has emerged.

The laser welder, unlike a contact spot welder that applies electricity to a welding object and contacts and welds a welding head, attempts to achieve non-contact high speed welding. Such a laser welder is a laser beam oscillated from an oscillator. It is designed to perform precise welding by irradiating the object to be welded through the output adjustment lens and the plurality of prisms in the welding head in which necessary components are incorporated together, and the output of the laser beam during the welding is the progress axis of the laser beam. The angle of the output adjustment lens with respect to is adjusted by changing.

When welding a welding object by applying a laser beam or electricity through such a non-contact laser welding machine or a contact spot welding machine, a powerful comb such as a flash and a plasma is generated. In particular, precision welding is performed by one to several tens of beam firings per second. In the laser welding machine described above, it is impossible for the operator to weld while visually checking the welding site by the powerful comb.

Therefore, in recent years, a welding confirmation device for confirming the presence or absence of welding during laser welding or spot welding in an automated production line has been devised and commercialized.

According to the welding confirmation device, a relay switch connected to an output side and connected to a contact point when performing laser or spot welding and outputting a switching signal, and displaying the number of times welding is performed to an operator by receiving a signal output from the relay switch. It is made of a display unit, such a welding confirmation device is installed in each of the automated production line is provided in the robot for laser welding or spot welding automatically according to a set program to inform the operator only the number of times the welding was performed.

However, the above welding confirmation device displays only the number of times the welding is performed to the robot whenever Robert performs the spot welding or the laser welding in the automated production line, so that the worker knows whether the Robert is performing a good welding to the welding object. Due to this, after Robert finishes welding for a large amount of welding objects, the operator visually checks the welding area of the welding object, and if the welding is not good, it may be inconvenient to re-control Robert and perform welding again. In addition, when the welding object is welded again, the welding part is not welded cleanly, and thus, the welding part of the welding object is damaged.

Particularly, when manual welding is required by a laser welding machine instead of Robert, the operator cannot see the precise visual inspection of the shape that is actually welded along with the welding progress by the powerful light such as flash or plasma generated secondarily. After welding, the welding part of the object to be welded should be visually checked and the welding should be repeated while repeating the laser welding and checking process. This will not only be a limiting factor in achieving non-contact high speed welding, which is an advantage of laser welding. It is pointed out that welding is not precise and irregular welding is performed because it is impossible to check at the same time as welding is performed.

Therefore, it is desirable to provide a welding confirmation device of eyeglass type so as to heal the conventional problems as described above and to make it possible to check the lower cost welding confirmation device in terms of cost, and the shape to be welded in real time with the naked eye. Do.

Accordingly, an object of the present invention is to provide a real-time welding confirmation device having a spectacle type to enable more precise welding while visually confirming the welded part in real time while protecting the eyes from the strong flashes generated during laser welding or general welding. This real-time welding confirmation device is provided in the form of glasses so that the LC shutter which can be opened and closed in synchronization with the generation speed whenever the pulse pulse current or the laser beam is generated from the welding head of the laser welding machine or the general welding machine. When the welding is completed, the LC shutter is closed momentarily to block the flashing occurring secondly, and when the welding is completed, the LC shutter is opened so that the shape after the welding can be continuously and rapidly checked with the naked eye. Is achieved by giving.

Another object of the present invention is to provide a real-time welding confirmation device having a glasses type that is convenient to move during laser welding and general welding, the real-time welding confirmation device is a type of glasses that can be worn on the face, the structure is simple It is characterized by being lightweight.

Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

1 to 4 is a configuration diagram showing an embodiment provided for the description of the real-time welding confirmation device having a spectacle type according to the present invention,

1 is a perspective view showing a real-time welding confirmation device having the spectacle type,

2 is an enlarged cross-sectional view showing the real-time welding confirmation device of FIG.

3 is a control block diagram for driving the LC shutter of the real-time welding confirmation device of FIG.

4 is an output waveform diagram illustrating a trigger pulse and an open / close pulse signal of an LC shutter according to the trigger switch of FIG. 3.

<Description of the symbols for the main parts of the drawings>

10: secondary flash blocking plate 20: first welding safety goggles

22: first protective glass 23: magnifying glass

24: filter lens 25: LC shutter

26: 2nd protective glass 30: 2nd welding confirmation safety glasses

40: opening and closing control unit 41: trigger switch

45: oscillation power supply 46: shutter synchronous drive power supply

According to the real-time welding confirmation device having a spectacle type according to the present invention for achieving the above objects, in the welding machine that generates a welding pulse current from the welding head to the target object and welds: (1) the eyeglasses to be covered by the operator's eyes Eye-wearing auxiliary glare blocking plate in the form of glasses to be worn on the face with a leg to block the glare generated during welding; (2) It is coupled to both sides of the face wearing auxiliary flash shielding plate and opened and closed due to synchronization of the firing speed of the welding pulse current of the welding head to enlarge and display the welding part while blocking harmful wavelengths during welding. 1, the second welding confirmation goggles; And (3) opening and closing control means for generating a trigger pulse to generate a welding pulse current from the welding head and generating an opening and closing pulse signal synchronized with the trigger pulse to open and close the first and second welding confirmation goggles. .

Preferably, the first and second welding confirmation goggles, the first and second protective glasses, respectively protruding and coupled to the front and back of the face wearing auxiliary flash blocking plate; A magnifying glass coupled to the second protective glass to enlarge the welding part; A filter lens positioned at the front of the magnifying glass to reflect the wavelength of light during welding; And an LC shutter positioned between the first protective glass and the filter lens to display the welded part in real time while repeating the opening and closing by the opening and closing pulse signal generated by the opening and closing control means.

Preferably, the opening and closing control means comprises a trigger switch for generating a start signal for welding; A power control unit generating operation power by the trigger switch; A microprocessor which controls the overall operation of the system of the welder by the voltage supplied from the power control unit; A welding pulse signal generator for generating a pulse signal for real time welding under the control of the microprocessor; An oscillation power supply unit which generates a trigger pulse for generating the welding pulse current by oscillating by a power source and a welding pulse signal provided by the power control unit and the welding pulse signal generation unit, respectively; And a shutter synchronous driving power supply unit generating an opening / closing pulse signal synchronized with the trigger pulse by the power provided from the power control unit and providing the first and second welding confirmation goggles.

Optionally, the closing time of the opening / closing pulse signal starts to close about 10 ms before and after the width of the trigger pulse, and preferably opens after 10 ms.

In this way, every time a welding pulse current for welding is generated from the welding head, the LC shutter in the shape of the face is closed to block the strong glare generated during welding, and every time the generation of the welding pulse current is finished It can be seen that the LC shutter consisting of the open after the welding can be confirmed in real time.

As a result, by wearing a glasses-type welding check device on the face during laser welding or general welding, it is possible to check the welded part in real time through the LC-type shutter of the glasses while protecting the eyes from strong glare and precise welding during manual welding. Of course, there is an advantage that can contribute to the convenience and safety of the welding operation.

And, there may be a plurality of embodiments of the present invention, the following will be described in detail for the most preferred embodiment.

Through this preferred embodiment, the objects, other objects, features and advantages of the present invention will become more apparent from the following description with an embodiment according to the present invention in connection with the accompanying drawings shown for illustrative purposes.

Hereinafter, with reference to the accompanying drawings it will be described in detail a preferred embodiment of a real-time welding confirmation device having a glasses type according to the present invention.

1 is a perspective view showing a real-time welding confirmation device having a spectacle type according to the invention, Figure 2 is a cross-sectional view showing an enlarged real-time welding confirmation device of Figure 1, Figure 3 is a real-time welding confirmation device of FIG. A control block diagram for driving an LC shutter.

Real-time welding confirmation device having a glasses type according to the present embodiment, as shown in Figures 1 to 3, wearing glasses on the face with a pair of glasses 12 so as to cover the eyes of the operator to block the glare generated during welding It is coupled to both sides of the face wearing auxiliary flash blocking plate 10 and the face wearing auxiliary flash blocking plate 10 and opened and closed due to synchronization of the firing speed of the welding pulse current of the welding head (not shown). The first and second welding confirmation goggles 20 and 30, the first and second welding confirmation goggles 20 and 30, and the electrical cable (1), which enlarge and display the welding part while blocking the glare during welding. 50) and generate a trigger pulse so that a welding pulse current is generated from the welding head of the laser welder or the general welder, and synchronize with the trigger pulse to open and close the first and second welding check goggles (20) (30). Dog It is composed of the opening and closing control unit 40 for generating a pulse signal and providing to the first and second welding confirmation safety glasses 20, 30 of the face wearing auxiliary flash blocking plate 10 in the form of glasses through the cable 50 do.

As shown in FIG. 2, the first welding confirmation safety glasses 20 among the first and second welding confirmation safety glasses 20 and 30 have the front and rear surfaces of the auxiliary wearable flash shield 10 for face wearing. The first and second protective glasses 22 and 26 protruded and coupled to each other, the magnifying glass 23 coupled to the second protective glass 26 to enlarge the welding portion, and the front surface of the magnifying glass 23. Is positioned between the filter lens 24 and the first protective glass 22 and the filter lens 24 to reflect the wavelength of light during welding, and is opened by an opening / closing pulse signal input through the cable 50. It is composed of an LC (Liquid Crystal) shutter 25 that displays the weld in real time while repeating and closing.

As shown in FIG. 3, the opening / closing control unit 40 includes a trigger switch 41 for generating a start signal for welding in accordance with an operator's operation, and a power control unit 42 for generating operating power in response to the welding start signal. And a microprocessor 43 for controlling the overall operation of the welding machine by the operating voltage supplied from the power supply controller 42, and a welding pulse signal for generating a pulse of a predetermined cycle for real time welding under the control of the microprocessor. Oscillation is generated by the power supply and the welding pulse signal provided by the generator 44, the power supply controller 42, and the welding pulse signal generator 44, respectively, to generate a trigger pulse for generating a welding pulse current. Generates an open / close pulse signal synchronized with the trigger pulse generated by the oscillation power supply unit 45 and the oscillation power supply unit 45 by the power provided from the power supply control unit 42. W is cable (50) through the configuration of a first shutter driving motive power source 46 to provide the LC shutter 25 of the second welding check safety glasses (20) (30).

The real-time welding confirmation device having a spectacle type according to the present invention made as described above will be described in more detail with reference to FIGS. 1 to 4.

First, in order to perform laser welding or general spot welding, the worker moves the welding head of the welding machine to the target object and wears the auxiliary flash blocking plate 10 on the face by using the eyeglasses 12 as shown in FIG. When the trigger switch 41 of the welding machine is turned on as shown in (a) of the welding machine, the power control unit 42 of the opening and closing control unit 40 generates operating power and provides the power to the microprocessor 43, which will be described in detail later. It is controlled by the trigger pulse generated from the oscillation power supply 47.

The microprocessor 43 controls the oscillation power supply unit 45 and the welding pulse signal generation unit 44 by the operating power supplied from the power control unit 42, and the welding pulse signal generation unit 44 is the microprocessor 43. By generating a pulse of a predetermined period for real time welding under the control of the oscillation power supply unit 45 is provided.

In addition, the oscillation power supply unit 45 is driven by the operating power input from the power supply control unit 42 and also oscillates by the welding pulse input from the welding pulse signal generator 44 to generate a trigger pulse as shown in FIG. Occurs. The generated trigger pulses are provided to the above-described welding head through the output terminal 47 to generate a welding pulse current corresponding to the trigger pulse from the welding head, and also to control the power supply controller 42. In this case, the width of the trigger pulse (T2: flash generation time) is set to 20 mW to 120 mW in the case of general welding, and 0.5 m to 20 mW in the case of laser welding.

Subsequently, the power supply control section 42 controls the shutter synchronous drive power supply section 46 in synchronization with the trigger pulse T2 provided from the oscillation power supply section 45, so that the shutter synchronous drive power supply section 46 is shown in FIG. The opening and closing pulse signal synchronized to the trigger pulse T2 as shown in b) is generated and provided to the LC shutters 25 of the first and second welding confirmation safety glasses 20 and 30 through the cable 50. Here, the closing time (T1) of the open / close signal for opening and closing the LC shutter 25 is set to be about 10 s before and after the width (T2) of the trigger pulse, that is, the firing speed of the welding pulse current, so that it closes first and opens later. desirable. For example, in the case of laser welding, when the width T2 of the trigger pulse generated from the oscillation power supply unit 45 is 0.5 k? -20 m, the closing time T1 of the open / close pulse signal generated from the shutter synchronous driving power supply unit 46 is determined. Set to open 10 닫 before trigger pulse and open after 10㎳. In case of general welding (trigger pulse width: 20㎳-120㎳), close the closing time (T1) by 10㎳ before It is desirable to set it to open after ㎳.

On the other hand, when the welding pulse current is emitted from the welding head of the laser welding machine or the general welding machine by the trigger pulse of the oscillation power supply unit 45 to the target object and the welding proceeds, powerful light such as flashing light and plasma is generated and the welding is performed. The debris is generated, wherein the strong light and debris are the second type of the secondary glare-shielding plate 10 and the first and second welding check goggles 20 and 30 in the form of glasses having the spectacles 12. The closing time T1 of the opening / closing pulse signal generated by the shutter synchronous driving power supply unit 46 is blocked by the protective glass 26 and the LC shutter 25 of the first and second welding check safety glasses 20 and 30 is generated. By opening and closing by the time and the open time (T3), it is possible to check the welded shape of the welded portion through the first and second welding confirmation safety glasses 20, 30 in real time. In other words, when the operator wants to visually check the welding part through the first and second welding check safety glasses 20 and 30, the magnifying glass 23 located on the second protective glass 26 is used to check the welding part. The magnification is displayed in an enlarged manner, and the filter lens 24 reflects the wavelength (1064 nm) of dangerous light generated during welding, marking, and cutting, and displays the weld shape of the enlarged welding portion through the LC shutter 25. On the protective glass 22, as described above, the LC shutter 25 has a closing time (T1) and an opening time (1) of the opening / closing pulse signal synchronized with the trigger pulse (T2: welding pulse current firing speed). T3) is opened and closed (where LC shutter opening and closing speed is about 50 times / sec), so that strong flash is blocked when LC shutter 25 is closed, and welding is opened when LC shutter 25 is opened. The shape after being made is instantaneous and continuous through the first protective glass 22. As it is shown in the picture, it is possible to check the welded shape in real time every time.

On the other hand, as a comparative example, unlike the prior art, that is, to visually check the welded portion of the welding target after welding after laser welding or general welding, the present invention is performed whenever a welding pulse current for welding occurs. The glasses-type LC shutter on the face is closed to block powerful flashes generated during welding, and the LC shutter is opened every time the welding pulse current is generated so that the shape after welding can be confirmed in real time. Able to know.

According to the present invention, according to the present invention, the welding confirmation device in the form of glasses is worn on the face during laser welding or general welding, so that the welded area can be confirmed in real time while protecting the eyes from strong flashes, and precise welding can be performed during manual welding. There is a possible advantage.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

According to the real-time welding confirmation device having the spectacle type of the present invention, which is clear from the above description, each time a welding pulse current or laser beam is generated from the welding head, the LC shutter in the spectacle type is opened and closed with a signal synchronized with the generation speed. It is possible to check the welded part visually with real time while protecting the eyes from the strong flashes generated during each welding. In addition, precise welding is possible in manual welding, and the convenience and safety of welding work are given. have.

Claims (4)

A welding machine for generating a welding pulse current from the welding head to the target object for welding; (1) wearing a glare-faced secondary glare blocking plate in the form of glasses to block the glare generated when welding is worn on the face with a pair of glasses so as to cover the eyes of the worker; (2) It is coupled to both sides of the face wearing auxiliary flash shielding plate and opened and closed due to synchronization of the firing speed of the welding pulse current of the welding head to enlarge and display the welding part while blocking harmful wavelengths during welding. 1, the second welding confirmation goggles; And (3) opening and closing control means for generating a trigger pulse to generate a welding pulse current from the welder and generating an opening and closing pulse signal synchronized with the trigger pulse to open and close the first and second welding confirmation goggles. Real-time welding confirmation device having a glasses type. The method according to claim 1, The first and second welding confirmation goggles, (1) first and second protective glasses protruding from and coupled to the front and back surfaces of the face wearing auxiliary flash blocking plate; (2) a magnifying glass coupled to the second protective glass to enlarge the welding portion; (3) a filter lens positioned in front of the magnifying glass to reflect the wavelength of light during welding; And (4) an LC shutter positioned between the first protective glass and the filter lens to check the welding part in real time while repeating the opening and closing by the opening / closing pulse signal generated by the opening / closing control means. Real time welding confirmation device with glasses type. The method according to claim 1, The opening and closing control means, (1) a trigger switch for generating a start signal for the welding; (2) a power control unit for generating operating power by the trigger switch; (3) a microprocessor that controls the overall operation of the welder by the voltage supplied from the power control unit; (4) a welding pulse signal generator for generating a pulse signal for real-time welding under the control of the microprocessor; (5) an oscillation power source for generating a trigger pulse for generating the welding pulse current by oscillating by a power source and a welding pulse signal provided by the power supply control unit and the welding pulse signal generation unit, respectively; And (6) has a spectacle type, characterized in that consisting of a shutter drive power supply for generating an opening and closing pulse signal synchronized with the trigger pulse by the power provided from the power supply control unit to provide to the first and second welding confirmation goggles Real time welding confirmation device. The method according to claim 1 or 3, The closing / opening time of the opening and closing pulse signal is a real-time welding confirmation device having a spectacle type, characterized in that closing 10 ㎳ earlier than the width of the trigger pulse and opens after 10 ㎳.