Gas shielded welding gun gas outlet state visualization system and visualization method thereof

Abstract

The invention provides a gas shielded welding gun gas outlet state visualization system and a visualization method thereof. The gas shielded welding gun gas outlet subsystem provides detection gas with a certain flow rate and temperature to the gas shielded welding gun through a gas supply device and a heating temperature control device, and the gas shielded welding gun sprays out the detection gas to form a gas outlet airflow; the gas outlet state optical detection subsystem detects the gas outlet airflow through a detection light path composed of a point light source, a first concave mirror, a second concave mirror and a shielding sheet distributed in a Z shape, so that the detection light emitted by the point light source and reflected by the first concave mirror to become parallel light is refracted under the action of detection gas molecules when passing through the detection gas, and then reflected by the second concave mirror to form a focused light and shadow, and the focused light and shadow is partially blocked by the shielding sheet and captured by a camera in the detection information acquisition imaging subsystem, and is converted into an electrical signal and sent to an information processing device for processing, and then the state image of the airflow is displayed on a display, thereby completing the visualization expression of the gas outlet state of the gas shielded welding gun.

Description

Technical Field

[0001] The invention relates to a gas shielded welding gun gas outlet state visualization system and a visualization method thereof, belonging to the technical field of welding equipment design and manufacturing. Background Art

[0002] Gas shielded welding is a type of arc welding. It means that under the protection of shielding gas, the arc is used as the heat source and the physical phenomenon of air discharge is utilized to convert electrical energy into the thermal energy and mechanical energy required for welding, thereby achieving the purpose of connecting metals.

[0003] Arc welding is currently the most widely used and most important fusion welding method, accounting for more than 60% of the total welding production.

[0004] The gas shielded welding gun is one of the core components of the gas shielded welding equipment. During gas shielded welding, welding shielding gas is ejected from the gas shielded welding gun to protect the welding area and the welding arc.

[0005] The practice of gas shielded welding has proved that the welding shielding gas can only effectively protect the welding area and welding arc if it is sprayed out from the gas shielded welding gun evenly and in laminar form, and the quality of welding can only be guaranteed if a stable arc is formed.

[0006] The welding shielding gas is supplied by the welding gas circuit. Therefore, the design of the welding shielding gas circuit and the quality of the gas circuit determine the quality of the welding shielding gas supply.

[0007] A typical sign of a poor gas line design or poor gas supply quality is the introduction of external oxygen, which causes the weld to turn black and oxidize.

[0008] In addition, since gas shielded welding usually requires the use of multiple types of gases, including shielding gas, ion gas, powder feeding gas, etc., there are relatively many corresponding gas pipelines in the gas shielded welding gun and the welding gun structure is relatively complex. In this case, in order to achieve laminar flow of shielding gas and ion gas, and no or little interference of powder feeding gas to laminar flow, it is necessary to effectively observe and control the outlet gas state of the gas shielded welding gun, and adjust the supply of various gases in time to ensure the quality of welding.

[0009] In the prior art, when performing gas shielded welding, the judgment of the gas state at the outlet of the gas shielded welding gun is mainly carried out through welding effect tests. However, this method of analyzing and judging the gas state at the outlet of the gas shielded welding gun through welding effect is usually difficult to grasp the key to the problem and it is not easy to find the crux of the problem. Therefore, it is difficult to identify the problem and solve the problem effectively and timely, thereby affecting the speed and effect of research and development of gas shielded welding equipment.

[0010] Facts have proved that only by effectively observing and inspecting the gas status at the outlet of the gas shielded welding gun can we ensure the consistency of welding gun production, improve the qualification rate of gas shielded welding gun production and ensure product quality.

[0011] Therefore, in order to ensure the quality of the gas shielded welding gun, ensure that the gas path of the welding gun is in good condition, and that the gas outlet shape, flow rate, and laminar flow distribution meet the specified requirements, it is necessary to optimize the gas duct design of the gas shielded welding gun and conduct strict quality inspections on the products leaving the factory. To achieve this goal, it is first necessary to realize the visual observation of the gas state at the outlet of the gas shielded welding gun.

[0012] However, it is well known that commonly used welding shielding gases such as argon, helium, carbon dioxide, etc. are colorless and transparent and are usually invisible.

[0013] In order to make the shielding gas visible, some people use liquid nitrogen or dry ice to condense water vapor into water mist, or use smoke cakes to generate smoke to help observe the shielding gas. However, since the flow rate of welding shielding gas is usually 10-20L / min, the above method is not effective for observation under such high-speed gas flow.

[0014] In addition, ultra-low temperature gases such as liquid nitrogen or dry ice also have an impact on welding equipment, and smoke cakes and the like may also cause damage to welding equipment and pollute the surrounding environment. Summary of the invention

[0015] In order to solve the deficiencies of the prior art, the embodiments of the present invention provide, on the one hand, a system for visualizing the gas outlet state of a gas shielded welding gun, and on the other hand, a method for visualizing the gas outlet state of a gas shielded welding gun, the purpose of which is to:

[0016] By means of the gas shielded welding gun gas outlet state visualization system and visualization method provided by the present invention, the gas outlet state of the gas shielded welding gun is visualized, thereby realizing direct observation of the gas outlet state of the gas shielded welding gun, so as to optimize the structural design of the gas shielded welding gun, control the product quality of the gas shielded welding gun, conveniently and quickly adjust the working state of the gas shielded welding gun, and ensure the quality of welding.

[0017] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0018] A gas shielded welding gun gas outlet state visualization system, characterized by comprising:

[0019] Gas shielded welding gun gas outlet subsystem, gas outlet status optical detection subsystem, detection information acquisition imaging subsystem;

[0020] The gas shielded welding gun gas outlet subsystem comprises a gas supply device, a heating and temperature control device and a gas shielded welding gun, wherein the gas supply device is connected to the heating and temperature control device, and the heating and temperature control device is connected to the gas shielded welding gun through a gas circuit;

[0021] The gas outlet state optical detection subsystem comprises a point light source, a first concave mirror, a second concave mirror and a shielding plate, wherein the first concave mirror and the second concave mirror are arranged in parallel on both sides of the gas shielded welding gun muzzle, the point light source is arranged on one side of the line connecting the first concave mirror and the second concave mirror, the shielding plate is arranged on the other side of the line connecting the first concave mirror and the second concave mirror, and the point light source and the first concave mirror, the second concave mirror and the shielding plate are distributed in a Z shape,

[0022] The detection information acquisition imaging subsystem includes a camera, an information processing device and a display, wherein the camera is arranged behind the shielding sheet, the lens of the camera is aimed at the mirror surface of the second concave mirror, and the camera is in information communication with the information processing device, and the information processing device is also in information communication with the display;

[0023] The gas supply device sends the detection gas into the heating temperature control device for heating, and the heated detection gas is ejected from the muzzle of the gas shielded welding gun to form an outlet gas flow passing through the first concave mirror and the line connecting the first concave mirror;

[0024] The light emitted by the point light source is reflected by the first concave mirror to become parallel light. When the parallel light passes through the outlet airflow, it is refracted by gas molecules in the outlet airflow to form refracted light and reaches the mirror surface of the second concave mirror. The second concave mirror reflects the refracted light and reaches the shielding sheet to focus to form focused light and shadow.

[0025] A portion of the focused light and shadow is blocked by the shielding sheet, and another portion of the focused light and shadow enters the lens of the camera and is converted into an electrical signal and sent to the information processing device. The information processing device processes the electrical signal and sends it to the display to display an image of the exhaust airflow state.

[0026] Furthermore, the point light source includes a light source, a convex lens and an aperture. The light source emits scattered light when powered on. The scattered light is focused by the convex lens, then emitted from the slit of the aperture and hits the first concave mirror to reflect into parallel light.

[0027] Furthermore, the light-emitting body is an LED lamp, and the power of the LED lamp is 10-20W.

[0028] Furthermore, the focal length of the first concave mirror is the same as the focal length of the second concave mirror.

[0029] Furthermore, the temperature of the outlet air flow is 50-150° C., and the flow rate of the outlet air flow is 0-20 L / min.

[0030] Furthermore, the gas supply device includes a gas cylinder and a flow meter, the heating temperature control device includes a heating gun and a temperature controller, the gas cylinder is connected to the heating gun through the flow meter, the heating gun is connected to the gas shielded welding gun through a gas circuit, and the temperature controller is connected to the heating gun.

[0031] Further:

[0032] The outer shell of the heating gun is a stainless steel cylinder, and the stainless steel cylinder contains a heating wire. The heating wire generates heat after being energized to heat the detection gas passing through the heating gun;

[0033] The temperature controller is connected in series with the heating gun, and the temperature controller is used to control the heating power of the heating gun, thereby controlling the temperature of the detection gas flowing out of the heating gun.

[0034] Furthermore, the camera is a CCD / CMOS camera or a high-speed camera.

[0035] Furthermore, the information processing device performs linear contrast expansion and homogenization processing on the electrical signal sent by the camera through image processing software.

[0036] A method for visualizing the gas outlet state of a gas shielded welding gun using the above-mentioned gas shielded welding gun gas outlet state visualization system is characterized by comprising the following steps:

[0037] Establishing the gas shielded welding gun gas outlet subsystem, specifically including:

[0038] Connecting the gas supply device to the heating and temperature control device, and connecting the heating and temperature control device to the gas shielded welding gun; or

[0039] Connecting the gas cylinder in the gas supply device with the flow meter in the gas supply device, connecting the flow meter with the heating gun in the heating and temperature control device, connecting the heating gun with the gas shielded welding gun through a gas line, and connecting the temperature controller in the heating and temperature control device with the heating gun;

[0040] Establish an optical detection subsystem for gas outlet status, including:

[0041] The first concave mirror and the second concave mirror are arranged in parallel on both sides of the gas shielded welding gun muzzle;

[0042] The point light source is arranged at one side of the line connecting the first concave mirror and the second concave mirror, and the shielding sheet is arranged at the other side of the line connecting the first concave mirror and the second concave mirror, so that the point light source and the first concave mirror, the second concave mirror and the shielding sheet are distributed in a zigzag shape; or

[0043] The convex lens is arranged on one side of the light source, and the aperture is arranged on the outer side of the convex lens with the light source as the center to form a point light source. Then, the point light source is arranged on one side of the line connecting the first concave mirror and the second concave mirror, and the shielding sheet is arranged on the other side of the line connecting the first concave mirror and the second concave mirror, so that the point light source and the first concave mirror, the second concave mirror and the shielding sheet are distributed in a zigzag shape relative to each other.

[0044] Establish a detection information acquisition imaging subsystem, including:

[0045] The camera is arranged behind the shielding sheet, and the lens of the camera is directed toward the mirror surface of the second concave mirror;

[0046] Connecting the camera to the information processing device;

[0047] Connecting the information processing device to the display;

[0048] Conduct visual inspection of the gas outlet status of the gas shielded welding gun, including:

[0049] Open the gas supply device and the heating and temperature control device, so that the detection gas flows out from the gas supply device at a flow rate of 0 to 20 L / min, and then is heated to 50 to 150° C. by the heating and temperature control device, and then is ejected from the muzzle of the gas shielded welding gun to form an outlet gas flow that passes through the first concave mirror and the line connecting the first concave mirror; or

[0050] The gas cylinder, the temperature controller and the heating gun are turned on, so that the detection gas flows out of the gas cylinder into the heating gun at a flow rate of 0 to 20 L / min through the adjustment of the flow meter, and the temperature of the heating gun is adjusted and controlled by the temperature controller so that the temperature of the detection gas after being heated by the heating gun is controlled between 50 and 150° C., and then the detection gas is ejected from the muzzle of the gas shielded welding gun to form an outlet gas flow passing through the first concave mirror and the line connecting the first concave mirror;

[0051] Turn on the point light source, let the light emitted by the point light source hit the first concave mirror and reflect into parallel light, let the parallel light pass through the outlet airflow to form refracted light and reach the mirror surface of the second concave mirror, the second concave mirror reflects the refracted light to the shielding sheet and focuses it to form focused light and shadow; or

[0052] Turn on the light-emitting body, so that the light-emitting body emits scattered light after being powered on, and let the scattered light be focused by the convex lens and then emitted from the slit of the aperture to hit the first concave mirror and reflect to become parallel light, let the parallel light pass through the outlet airflow to form refracted light and reach the mirror surface of the second concave mirror, and the second concave mirror reflects the refracted light to reach the shielding sheet and focus to form focused light and shadow;

[0053] Adjust the shielding sheet so that 1 / 3 to 2 / 3 of the focused light and shadow are shielded;

[0054] Adjusting the lens of the camera so that the focused light and shadow that is not blocked by the blocking sheet enters the lens of the camera and is converted into an electrical signal and sent to the information processing device;

[0055] The information processing device processes the electrical signal and sends it to the display to display the image of the gas flow state, thereby completing the visual expression of the gas flow state of the gas shielded welding gun; or

[0056] The information processing device performs linear contrast expansion and homogenization processing on the electrical signal through image processing software, and then sends it to the display to display the image of the exhaust gas flow state, thereby completing the visual expression of the exhaust gas state of the gas shielded welding gun.

[0057] Compared with the prior art, the embodiments of the present invention have the following beneficial effects and significant improvements:

[0058] 1) A gas shielded welding gun gas outlet state visualization system and a visualization method thereof provided in an embodiment of the present invention include a gas shielded welding gun gas outlet subsystem, a gas outlet state optical detection subsystem, and a detection information acquisition imaging subsystem;

[0059] The gas shielded welding gun gas outlet subsystem provides a certain flow rate and a certain temperature of detection gas to the gas shielded welding gun through a gas supply device and a heating temperature control device, so that the detection gas is ejected from the gun mouth of the gas shielded welding gun to form a gas outlet airflow;

[0060] The optical detection subsystem for the outgoing gas state detects the outgoing gas flow by forming a detection optical path through a point light source, a first concave mirror, a second concave mirror and a shielding sheet distributed in a Z shape, so that the detection light emitted by the point light source and reflected by the first concave mirror to become a parallel light is refracted by the detection gas molecules when passing through the detection gas, and then reflected by the second concave mirror. The remaining focused light and shadow part of the light is blocked by the shielding sheet and captured by the camera in the detection information acquisition imaging subsystem and converted into an electrical signal and sent to the information processing device;

[0061] The information processing device processes the information captured by the camera and converted into electrical signals, and then sends them to the display, showing the state image of the gas flow, that is, completing the visual expression of the gas outlet state of the gas shielded welding gun;

[0062] 2) A gas shielded welding gun gas outlet state visualization system and visualization method provided in an embodiment of the present invention have a novel and unique design concept, a simple and effective system setting, and creatively utilize the principle that the change of the gas density when flowing can cause the parallel light rays passing through the flowing gas to be refracted, and the refractive index gradient of the parallel light rays in the flowing gas is proportional to the gas density of the flowing gas, so that the density change of the transparent gas commonly used in gas shielded welding, such as welding shielding gas, when flowing can be recorded and visualized in the form of refraction of the parallel light rays passing through it, so as to be applied to the direct observation of the gas outlet state from the gas shielded welding gun;

[0063] 3) A gas shielded welding gun gas outlet state visualization system and visualization method provided by the embodiment of the present invention can obtain a high-definition image of the gas shielded welding gun gas outlet state, which is used to optimize the design of the gas shielded welding gun, control the quality of the gas shielded welding gun, adjust the working state of the gas shielded welding gun, and ensure the quality of welding;

[0064] 4) The embodiment of the present invention provides a gas shielded welding gun gas outlet state visualization system and visualization method thereof. The detection gas temperature used during operation is between 50 and 150° C. Such a gas temperature does not damage the gas shielded welding gun, and the gas outlet state optical detection subsystem and the detection information acquisition imaging subsystem are not in contact with the gas shielded welding gun, and will not cause damage to the gas shielded welding gun. In addition, the entire system does not involve dry ice, liquid nitrogen, smoke cakes, and other media that may damage the gas shielded welding gun and pollute the surrounding environment during operation, and is safe and environmentally friendly;

[0065] 5) The gas shielded welding gun gas outlet state visualization system and visualization method provided in the embodiment of the present invention provide ideas and methods for the visualization detection of the flow state or density of other colorless gases by detecting the corresponding relationship between light and the density of the flowing airflow. It is innovative and inspiring, and therefore has great social benefits and promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only drawings of some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor, but these other drawings also belong to the drawings required for use in the embodiments of the present invention.

[0067] Figure 1 A schematic diagram of the structure of a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention;

[0068] Figure 2A schematic diagram of the structure of a gas outlet state optical detection subsystem in a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention;

[0069] Figure 3 A schematic diagram of the structure of a heating and temperature control device in a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention;

[0070] Figure 4 A schematic block diagram of a gas shielded welding gun gas outlet state visualization process provided by an embodiment of the present invention;

[0071] Figure 5 A gas shielded welding gun gas outlet state visualization image displayed by a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention;

[0072] Figure 6 A gas shielded welding gun gas outlet state visualization system provided in an embodiment of the present invention displays a gas shielded welding gun gas outlet state visualization image processed by image processing software.

[0073] In the figure:

[0074] 10-gas shielded welding gun gas outlet subsystem, 11-gas supply device, 111-gas cylinder, 112-flow meter, 12-heating temperature control device, 121-heating gun, 122-temperature controller, 13-gas shielded welding gun;

[0075] 20-gas outlet state optical detection subsystem, 21-point light source, 211-illuminant, 212-convex lens, 213-aperture, 22-first concave mirror, 23-second concave mirror, 24-shielding sheet;

[0076] 30-detection information acquisition imaging subsystem, 31-camera, 32-information processing device, 33-display. DETAILED DESCRIPTION

[0077] In order to make the purpose, technical solution, beneficial effects and significant progress of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the drawings provided in the embodiments of the present invention. Obviously, all the described embodiments are only partial embodiments of the present invention, rather than all embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0078] It should be noted that:

[0079] The terms "first", "second", etc. in the specification and claims of the present invention and the drawings of the embodiments of the present invention are only used to distinguish different objects rather than to describe a specific order; in addition, the term "comprise" and any variations thereof are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0080] What needs to be understood is:

[0081] In the description of the embodiments of the present invention, some indicative orientation or position words used are only based on the orientation or position relationship shown in the drawings of the embodiments of the present invention. They are for the purpose of facilitating the description of the embodiments of the present invention and simplifying the explanation, rather than indicating or implying the specific orientation, specific orientation structure and operation that the device or element described must have. Therefore, they should not be understood as limitations on the present invention.

[0082] In the present invention:

[0083] Unless otherwise clearly stipulated and limited, the terms such as "installation", "connection", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or a movable connection, a wired or wireless communication connection, or an integrated connection; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0084] It should also be noted that:

[0085] The following specific embodiments may be combined with each other, and the same or similar concepts or processes therein may not be described in detail in some embodiments.

[0086] The technical solution of the present invention is described in detail below with specific embodiments.

[0087] Embodiment 1

[0088] This embodiment provides a system for visualizing the gas outlet status of a gas shielded welding gun.

[0089] like Figure 1 A schematic diagram of a gas shielded welding gun gas outlet state visualization system structure provided by an embodiment of the present invention, and Figure 2 The structural schematic diagram of a gas outlet state optical detection subsystem in a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention is shown as follows:

[0090] A gas shielded welding gun gas outlet state visualization system, characterized by comprising:

[0091] Gas shielded welding gun gas outlet subsystem 10, gas outlet state optical detection subsystem 20, detection information acquisition imaging subsystem 30;

[0092] The gas shielded welding gun gas outlet subsystem 10 includes a gas supply device 11, a heating and temperature control device 12 and a gas shielded welding gun 13, the gas supply device 11 is connected to the heating and temperature control device 12, and the heating and temperature control device 12 is connected to the gas shielded welding gun 13 through a gas circuit;

[0093] The gas outlet state optical detection subsystem 20 includes a point light source 21, a first concave mirror 22, a second concave mirror 23 and a shielding plate 24. The first concave mirror 22 and the second concave mirror 23 are arranged in parallel on both sides of the muzzle of the gas shielded welding gun 11. The point light source 21 is arranged on one side of the line connecting the first concave mirror 22 and the second concave mirror 23, and the shielding plate 24 is arranged on the other side of the line connecting the first concave mirror 22 and the second concave mirror 23. The point light source 21 and the first concave mirror 22, the second concave mirror 23 and the shielding plate 24 are distributed in a Z shape.

[0094] The detection information acquisition imaging subsystem 30 includes a camera 31, an information processing device 32 and a display 33. The camera 31 is arranged behind the shielding sheet 24. The lens of the camera 31 is aimed at the mirror surface of the second concave mirror 23. The camera 31 is in information communication with the information processing device 31, and the information processing device 32 is in information communication with the display 33 at the same time.

[0095] The gas supply device 11 delivers the detection gas into the heating temperature control device 12 for heating, and the heated detection gas is ejected from the muzzle of the gas shielded welding gun 13 to form an outlet gas flow passing through the line connecting the first concave mirror 22 and the first concave mirror 23;

[0096] The light emitted by the point light source 21 is reflected by the first concave mirror 22 to become parallel light. When the parallel light passes through the outgoing air flow, it is refracted by the gas molecules in the outgoing air flow to form refracted light and reaches the mirror surface of the second concave mirror 23. The second concave mirror 23 reflects the refracted light and reaches the shielding sheet 24 to focus to form focused light and shadow.

[0097] A portion of the focused light and shadow is blocked by the shielding sheet 24, and another portion of the focused light and shadow enters the lens of the camera 31 and is converted into an electrical signal and sent to the information processing device 32. The information processing device 32 processes the electrical signal and sends it to the display 33 to display an image of the exhaust airflow state.

[0098] As an optional technical solution, in this embodiment:

[0099] The point light source 21 can be a device including a light source 211, a convex lens 212 and an aperture 213, wherein the light source 211 emits scattered light after being energized, and the scattered light is focused by the convex lens 212 and then emitted from the slit of the aperture 213 to hit the first concave mirror 22 and reflect to become parallel light.

[0100] Furthermore, the light emitting body 211 in the point light source 21 may be an LED lamp, and the power of the LED lamp is 10-20W.

[0101] In this embodiment, the gas supply device 11 includes a gas cylinder 111 and a flow meter 112, the heating temperature control device 12 includes a heating gun 121 and a temperature controller 122, the gas cylinder 111 is connected to the heating gun 121 through the flow meter 112, the heating gun 121 is connected to the gas shielded welding gun 13 through the gas circuit, and the temperature controller 122 is connected to the heating gun 121.

[0102] Further, such as Figure 3 The structural schematic diagram of a heating temperature control device in a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention is shown as follows:

[0103] The outer shell of the heating gun 121 is a stainless steel cylinder, which contains a heating wire. The heating wire generates heat when powered on to heat the detection gas passing through the heating gun 121.

[0104] The temperature controller 122 is connected in series with the heating gun 121 , and the temperature controller 122 is used to control the heating power of the heating gun 121 , and further control the temperature of the detection gas flowing out of the heating gun 121 .

[0105] In addition, in the above embodiments:

[0106] The focal length of the first concave mirror 22 is the same as the focal length of the second concave mirror 23;

[0107] The camera 31 may be a CCD / CMOS camera or a high-speed camera.

[0108] When this embodiment works:

[0109] The temperature of the outlet air flow is controlled within the range of 50-150°C, and the flow rate of the outlet air flow is controlled within the range of 0-20L / min;

[0110] The information processing device 32 performs linear contrast expansion and homogenization processing on the electrical signal sent by the camera 31 through image processing software.

[0111] From the above description, we can see that:

[0112] The present embodiment provides a gas shielded welding gun gas outlet state visualization system, comprising a gas shielded welding gun gas outlet subsystem, a gas outlet state optical detection subsystem, and a detection information acquisition imaging subsystem;

[0113] The gas shielded welding gun gas outlet subsystem provides a certain flow rate and a certain temperature of detection gas to the gas shielded welding gun through a gas supply device and a heating temperature control device, so that the detection gas is ejected from the gun mouth of the gas shielded welding gun to form a gas outlet airflow;

[0114] The optical detection subsystem for the outgoing gas state detects the outgoing gas flow by forming a detection optical path through a point light source, a first concave mirror, a second concave mirror and a shielding sheet distributed in a Z shape, so that the detection light emitted by the point light source and reflected by the first concave mirror to become a parallel light is refracted by the detection gas molecules when passing through the detection gas, and then reflected by the second concave mirror. The remaining focused light and shadow part of the light is blocked by the shielding sheet and captured by the camera in the detection information acquisition imaging subsystem and converted into an electrical signal and sent to the information processing device;

[0115] The information processing device processes the information captured by the camera and converted into electrical signals and then sends them to the display, showing the state image of the exhaust gas flow, thereby completing the visual expression of the exhaust state of the gas shielded welding gun.

[0116] Embodiment 2

[0117] This embodiment provides a method for visualizing the gas outlet state of a gas shielded welding gun by using the gas outlet state visualization system of the gas shielded welding gun provided in the first embodiment.

[0118] like Figure 4 A schematic block diagram of a gas shielded welding gun gas outlet state visualization process provided by an embodiment of the present invention is shown as follows:

[0119] A method for visualizing the gas outlet state of a gas shielded welding gun using the gas outlet state visualization system of the gas shielded welding gun provided in the first embodiment comprises the following steps:

[0120] Establish the gas shielded welding gun gas outlet subsystem, including:

[0121] Connect the gas supply device to the heating temperature control device, and connect the heating temperature control device to the gas shielded welding gun; or

[0122] Connect the gas cylinder in the gas supply device with the flow meter in the gas supply device, connect the flow meter with the heating gun in the heating temperature control device, connect the heating gun with the gas shielded welding gun through the gas line, and connect the temperature controller in the heating temperature control device with the heating gun;

[0123] Establish an optical detection subsystem for gas outlet status, including:

[0124] The first concave mirror and the second concave mirror are arranged in parallel on both sides of the muzzle of the gas shielded welding gun;

[0125] The point light source is arranged on one side of the line connecting the first concave mirror and the second concave mirror, and the shielding sheet is arranged on the other side of the line connecting the first concave mirror and the second concave mirror, so that the point light source and the first concave mirror, the second concave mirror and the shielding sheet are distributed in a zigzag shape; or

[0126] A convex lens is arranged on one side of the light source, and an aperture is arranged on the outer side of the convex lens centered on the light source to form a point light source. Then, the point light source is arranged on one side of the line connecting the first concave mirror and the second concave mirror, and a shielding plate is arranged on the other side of the line connecting the first concave mirror and the second concave mirror, so that the point light source and the first concave mirror, the second concave mirror and the shielding plate are distributed in a zigzag shape.

[0127] Establish a detection information acquisition imaging subsystem, including:

[0128] The camera is arranged behind the shielding sheet, and the lens of the camera is directed toward the mirror surface of the second concave mirror;

[0129] Connecting the camera to the information processing device;

[0130] Connecting the information processing device to the display;

[0131] Conduct visual inspection of the gas outlet status of the gas shielded welding gun, including:

[0132] Open the gas supply device and the heating and temperature control device, so that the detection gas flows out from the gas supply device at a flow rate of 0 to 20 L / min, and then is heated to 50 to 150°C by the heating and temperature control device, and then is ejected from the muzzle of the gas shielded welding gun to form an outlet gas flow that passes through the first concave mirror and the line connecting the first concave mirror; or

[0133] Turn on the gas cylinder, the thermostat and the heating gun, so that the detection gas flows out of the gas cylinder into the heating gun at a flow rate of 0 to 20 L / min through the adjustment of the flow meter, and the thermostat adjusts and controls the temperature of the heating gun, so that the temperature of the detection gas after being heated by the heating gun is controlled between 50 and 150° C., and then the detection gas is ejected from the muzzle of the gas shielded welding gun to form an outlet gas flow passing through the first concave mirror and the connecting line of the first concave mirror;

[0134] Turn on the point light source, let the light emitted by the point light source hit the first concave mirror and reflect into parallel light, let the parallel light pass through the outgoing air flow to form refracted light and reach the mirror surface of the second concave mirror, the second concave mirror reflects the refracted light to the shielding sheet and focuses to form focused light and shadow; or

[0135] Turn on the light source, so that it emits scattered light after being powered on, and let the scattered light be focused by the convex lens and then emitted from the slit of the aperture to hit the first concave mirror and reflect to become parallel light, and let the parallel light pass through the outlet air flow to form refracted light and reach the mirror surface of the second concave mirror, and the second concave mirror reflects the refracted light to reach the shielding sheet and focus to form focused light and shadow;

[0136] Adjust the shielding piece so that 1 / 3 to 2 / 3 of the focused light and shadow are blocked;

[0137] Adjust the lens of the camera so that the focused light and shadow that is not blocked by the blocking sheet enters the lens of the camera and is converted into an electrical signal and sent to the information processing device;

[0138] The information processing device processes the electrical signal and sends it to the display to display the image of the gas flow state, thereby completing the visual expression of the gas flow state of the gas shielded welding gun; or

[0139] The information processing device performs linear contrast expansion and homogenization processing on the electrical signal through image processing software, and then sends it to the display to display the image of the exhaust gas flow state, thereby completing the visual expression of the exhaust gas state of the gas shielded welding gun.

[0140] Specific implementation cases

[0141] To better help understand the technical solution provided by the present invention, a specific implementation case will be provided below in combination with the drawings shown in the specification to further illustrate the gas shielded welding gun gas outlet state visualization system and its visualization method and implementation results provided by the embodiment of the present invention.

[0142] First, press Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown:

[0143] The gas shielded welding gun gas outlet subsystem is assembled by using the gas cylinder 111, the flow meter 112, the heating gun 121, the temperature controller 122 and the gas shielded welding gun 13;

[0144] The point light source 21 is formed by the light source 211, the convex lens 212, and the aperture 213, and the optical detection subsystem of the gas outlet state is further formed by the first concave mirror 22, the second concave mirror 23 and the shielding sheet 24;

[0145] The camera 31, the information processing device 32 and the display 33 are used to complete the formation of the detection information acquisition imaging subsystem, thereby constructing a gas shielded welding gun gas outlet state visualization system; wherein:

[0146] The outer shell of the heating gun 121 is a stainless steel cylinder, which contains a stainless steel heating wire with a certain resistance. When the power is turned on, the heating wire heats up and heats the detection gas passing into the heating gun 121;

[0147] The temperature controller 122 is connected in series with the heating gun 121. By adjusting the internal resistance of the temperature controller 122, the current flowing into the heating gun 121 is adjusted, so as to achieve the purpose of controlling the outlet temperature of the detection gas;

[0148] The gas shielded welding gun 13 is a high penetration TIG welding gun S-TIG;

[0149] The detection gas is pure argon gas, which is commonly used as a shielding gas for gas shielded welding and is filled in the gas cylinder 111. The argon gas enters the heating gun 121 at a flow rate of 0 to 20 L / min. The heated argon gas is passed into the gas inlet of the S-TIG welding gun and then ejected from the gas outlet of the S-TIG welding gun. The ejected gas is placed in the gas outlet optical detection subsystem for optical detection.

[0150] The light source 211 in the point light source 21 is a 15W LED small lamp. The point light source 21 also includes a convex lens 212 and a slit aperture 213. The scattered light of the LED bulb is focused by the convex lens 212 and then emitted from the slit of the aperture. After that, the light is reflected, refracted and focused by the first concave mirror 22 and the second concave mirror 23, both of which have a focal length of 1.5m. The edge of the thin mask 24 blocks part of the focused light and shadow, and the unblocked part of the focused light and shadow enters the lens of the camera 31.

[0151] During this process, the position of the shielding sheet is appropriately adjusted to achieve a certain amount of light shielding. Generally, the shielding sheet should shield 1 / 3 to 2 / 3 of the focused light and shadow. In this implementation case, the shielding sheet shields 1 / 2 of the focused light and shadow.

[0152] In addition, the focal length of the camera lens should be properly adjusted so that the camera lens is focused near the gas outlet of the welding gun, and the camera lens aperture and exposure time should be slightly adjusted to make the image brightness appropriate.

[0153] When the outlet gas temperature of the gas shielded welding gun 13 rises to about 60°C, the gas ejected from the gas shielded welding gun 13 can be photographed by a camera. Generally speaking, a clear image can be obtained when the outlet gas temperature of the gas shielded welding gun 13 is within the range of 50 to 150°C.

[0154] The camera can be a common CCD / CMOS camera or a high-speed camera. When a high-speed camera is used, the instantaneous dynamic effect of the gas can be recorded.

[0155] In this embodiment, a high-speed camera is used to shoot, and the gas outlet state at the outlet of the gas shielded welding gun 13 is processed by the information processing device 32 and displayed on the display 33 as follows: Figure 5A visualized image shown in a visualized image of a gas shielded welding gun gas outlet state displayed by a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention;

[0156] In the above process, when the gas flow rate of the gas shielded welding gun 13 is small, the detection gas is not heated enough, or the system adjustment and exposure are not in place, the imaging effect may be poor. At this time, the image processing software such as Photoshop can be run in the information processing device 32 to perform linear contrast expansion and homogenization processing on the image, which can improve the clarity of the imaging. Figure 6 A visualization image shown in a visualization image of a gas shielded welding gun gas outlet state processed by image processing software and displayed by a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention.

[0157] In summary, we can see that:

[0158] Firstly, a gas shielded welding gun gas outlet state visualization system provided by an embodiment of the present invention can display the state image of the gas outlet airflow on a display or a white screen through the combination and application of the gas shielded welding gun gas outlet subsystem, the gas outlet state optical detection subsystem, and the detection information acquisition imaging subsystem, that is, complete the visualization expression of the gas outlet state of the gas shielded welding gun;

[0159] Secondly, a gas shielded welding gun gas outlet state visualization system and visualization method provided by the embodiment of the present invention have novel and unique design concepts, simple and effective system settings, and creatively utilize the principle that the change in the density of the gas itself during flow can cause the parallel light rays passing through the flowing gas to be refracted, and the refractive index gradient of the parallel light rays in the flowing gas is proportional to the gas density of the flowing gas, so that the density change of the transparent gas commonly used in gas shielded welding, such as welding shielding gas, during flow can be recorded and visualized in the form of refraction of the parallel light rays passing through it, thereby being applied to the direct observation of the gas outlet state from the gas shielded welding gun;

[0160] Thirdly, by using a gas shielded welding gun gas outlet state visualization system and visualization method provided by an embodiment of the present invention, a high-definition image of the gas shielded welding gun gas outlet state can be obtained, which is used to optimize the design of the gas shielded welding gun, control the quality of the gas shielded welding gun, adjust the working state of the gas shielded welding gun, and ensure the quality of welding;

[0161] In addition, the gas outlet state visualization system and visualization method of the gas shielded welding gun provided by the embodiment of the present invention use a detection gas temperature between 50 and 150° C. during operation, and such a gas temperature does not damage the gas shielded welding gun, and the gas outlet state optical detection subsystem and the detection information acquisition imaging subsystem are not in contact with the gas shielded welding gun, and will not cause damage to the gas shielded welding gun. In addition, the entire system does not involve dry ice, liquid nitrogen, smoke cakes, and other media that may damage the gas shielded welding gun and pollute the surrounding environment during operation, and is safe and environmentally friendly.

[0162] Finally, a gas shielded welding gun gas outlet state visualization system and visualization method provided in an embodiment of the present invention, by detecting the correspondence between light and the density of the flowing airflow, provides ideas and methods for the visualization detection of the flow state or density of other colorless gases. It is groundbreaking and inspiring, and therefore has great social benefits and promotion and application value.

[0163] In the description of the above manual:

[0164] The terms "this embodiment", "an embodiment of the present invention", "as shown in ...", "further", "as an optional technical solution", etc., mean that the specific features, structures, materials or characteristics described in the embodiment or example are included in at least one embodiment or example of the present invention;

[0165] In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined or combined in any one or more embodiments or examples in a suitable manner;

[0166] In addition, under the premise that no contradiction occurs, a person of ordinary skill in the art may combine or combine different embodiments or examples and features of different embodiments or examples described in this specification.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. The non-essential improvements, adjustments or replacements made by those skilled in the art based on the contents of this specification are all within the scope of protection required by the present invention.

Claims

1. A gas shielded welding gun gas outlet status visualization system, characterized in that: include: Gas shielded welding gun gas outlet subsystem, gas outlet status optical detection subsystem, detection information acquisition imaging subsystem; The gas shielded welding gun gas outlet subsystem comprises a gas supply device, a heating and temperature control device and a gas shielded welding gun, wherein the gas supply device is connected to the heating and temperature control device, and the heating and temperature control device is connected to the gas shielded welding gun through a gas circuit; The gas outlet state optical detection subsystem comprises a point light source, a first concave mirror, a second concave mirror and a shielding plate, wherein the first concave mirror and the second concave mirror are arranged in parallel on both sides of the gas shielded welding gun muzzle, the point light source is arranged on one side of the line connecting the first concave mirror and the second concave mirror, the shielding plate is arranged on the other side of the line connecting the first concave mirror and the second concave mirror, and the point light source and the first concave mirror, the second concave mirror and the shielding plate are distributed in a Z shape, The detection information acquisition imaging subsystem includes a camera, an information processing device and a display, wherein the camera is arranged behind the shielding sheet, the lens of the camera is aimed at the mirror surface of the second concave mirror, and the camera is in information communication with the information processing device, and the information processing device is also in information communication with the display; The gas supply device sends the detection gas into the heating and temperature control device for heating, and the heated detection gas is ejected from the muzzle of the gas shielded welding gun to form an outlet gas flow that passes through the first concave mirror and the connecting line of the first concave mirror, wherein the gas supply device includes a gas cylinder and a flow meter, and the heating and temperature control device includes a heating gun and a temperature controller, the gas cylinder is connected to the heating gun through the flow meter, the heating gun is connected to the gas shielded welding gun through a gas path, and the temperature controller is connected to the heating gun, the outer shell of the heating gun is a stainless steel cylinder, and the stainless steel cylinder contains a heating wire, and the heating wire generates heat after being energized to heat the detection gas passing through the heating gun; The thermostat is connected in series with the heating gun, and the thermostat is used to control the heating power of the heating gun, thereby controlling the temperature of the detection gas flowing out of the heating gun; The light emitted by the point light source is reflected by the first concave mirror to become parallel light. When the parallel light passes through the outlet airflow, it is refracted by the gas molecules in the outlet airflow to form refracted light and reaches the mirror surface of the second concave mirror. The second concave mirror reflects the refracted light and reaches the shielding sheet to focus to form focused light and shadow, wherein the point light source includes a light emitter, a convex lens and an aperture. After the light emitter is powered on, it emits scattered light. After the scattered light is focused by the convex lens, it is emitted from the slit of the aperture and hits the first concave mirror to reflect to become parallel light. A portion of the focused light and shadow is blocked by the shielding sheet, and another portion of the focused light and shadow enters the lens of the camera and is converted into an electrical signal and sent to the information processing device. The information processing device processes the electrical signal and sends it to the display to display an image of the exhaust airflow state.

2. The gas shielded welding gun gas outlet state visualization system according to claim 1, characterized in that: The light emitting body is an LED lamp, and the power of the LED lamp is 10-20W.

3. The gas shielded welding gun gas outlet state visualization system according to claim 1, characterized in that: The focal length of the first concave mirror is the same as the focal length of the second concave mirror.

4. The gas shielded welding gun gas outlet state visualization system according to claim 1, characterized in that: The temperature of the outlet air flow is 50-150° C., and the flow rate of the outlet air flow is 0-20 L / min.

5. The gas shielded welding gun gas outlet state visualization system according to claim 1, characterized in that: The camera is a CCD / CMOS camera or a high-speed camera.

6. The gas shielded welding gun gas outlet state visualization system according to claim 1, characterized in that: The information processing device performs linear contrast expansion and homogenization processing on the electrical signal sent by the camera through image processing software.

7. A method for visualizing the gas outlet state of a gas shielded welding gun, characterized in that: The visualization process of the gas shielded welding gun gas outlet state adopts the gas shielded welding gun gas outlet state visualization system according to any one of claims 1 to 6, and the visualization process of the gas shielded welding gun gas outlet state comprises the following steps: Establishing the gas shielded welding gun gas outlet subsystem, specifically including: Connecting the gas supply device to the heating and temperature control device, and connecting the heating and temperature control device to the gas shielded welding gun; or Connecting the gas cylinder in the gas supply device to the flow meter in the gas supply device, connecting the flow meter to the heating gun in the heating and temperature control device, connecting the heating gun to the gas shielded welding gun through a gas path, and connecting the temperature controller in the heating and temperature control device to the heating gun; Establish an optical detection subsystem for gas outlet status, including: The first concave mirror and the second concave mirror are arranged in parallel on both sides of the gas shielded welding gun muzzle; The point light source is arranged at one side of the line connecting the first concave mirror and the second concave mirror, and the shielding sheet is arranged at the other side of the line connecting the first concave mirror and the second concave mirror, so that the point light source and the first concave mirror, the second concave mirror and the shielding sheet are distributed in a zigzag shape; or A convex lens is arranged on one side of the light source, and an aperture is arranged on the outer side of the convex lens with the light source as the center to form a point light source. Then, the point light source is arranged on one side of the line connecting the first concave mirror and the second concave mirror, and the shielding sheet is arranged on the other side of the line connecting the first concave mirror and the second concave mirror, so that the point light source and the first concave mirror, the second concave mirror and the shielding sheet are distributed in a zigzag shape relative to each other. Establish a detection information acquisition imaging subsystem, including: The camera is arranged behind the shielding sheet, and the lens of the camera is directed toward the mirror surface of the second concave mirror; Connecting the camera to the information processing device; Connecting the information processing device to the display; Conduct visual inspection of the gas outlet status of the gas shielded welding gun, including: Open the gas supply device and the heating and temperature control device, so that the detection gas flows out from the gas supply device at a flow rate of 0 to 20 L / min, and then is heated to 50 to 150° C. by the heating and temperature control device, and then is ejected from the muzzle of the gas shielded welding gun to form an outlet gas flow that passes through the first concave mirror and the line connecting the first concave mirror; or The gas cylinder, the temperature controller and the heating gun are turned on, so that the detection gas flows out of the gas cylinder into the heating gun at a flow rate of 0 to 20 L / min through the adjustment of the flow meter, and the temperature of the heating gun is adjusted and controlled by the temperature controller so that the temperature of the detection gas after being heated by the heating gun is controlled between 50 and 150° C., and then the detection gas is ejected from the muzzle of the gas shielded welding gun to form an outlet gas flow passing through the first concave mirror and the line connecting the first concave mirror; Turn on the point light source, let the light emitted by the point light source hit the first concave mirror and reflect into parallel light, let the parallel light pass through the outlet airflow to form refracted light and reach the mirror surface of the second concave mirror, the second concave mirror reflects the refracted light to the shielding sheet and focuses it to form focused light and shadow; or Turn on the light-emitting body, so that the light-emitting body emits scattered light after being powered on, and let the scattered light be focused by the convex lens and then emitted from the slit of the aperture to hit the first concave mirror and reflect to become parallel light, let the parallel light pass through the outlet airflow to form refracted light and reach the mirror surface of the second concave mirror, and the second concave mirror reflects the refracted light to reach the shielding sheet and focus to form focused light and shadow; Adjust the shielding sheet so that 1 / 3 to 2 / 3 of the focused light and shadow are shielded; Adjusting the lens of the camera so that the focused light and shadow that is not blocked by the blocking sheet enters the lens of the camera and is converted into an electrical signal and sent to the information processing device; The information processing device processes the electrical signal and sends it to the display to display the image of the gas flow state, thereby completing the visual expression of the gas flow state of the gas shielded welding gun; or The information processing device performs linear contrast expansion and homogenization processing on the electrical signal through image processing software, and then sends it to the display to display the image of the exhaust gas flow state, thereby completing the visual expression of the exhaust gas state of the gas shielded welding gun.

Images