TWI805387B - Soldering materials providing device, soldering system and automatic control method for blowing - Google Patents

Abstract

A soldering materials providing device, a soldering system and an automatic control method for blowing. The soldering materials providing device has a providing pipe for materials and gas as a gas internal flow channel and a casing. The providing pipe for materials and gas has a gas-providing pipe and a material-providing pipe. The casing covers the end of the providing pipe for materials and gas, and has an output opening to output the soldering materials and flowing gas. The providing pipe for materials and gas penetrates into the casing. The present disclosed can reduce a device volume, and effectively dissipate the smoke caused by soldering, thereby improving the soldering quality.

Description

Automatic control method of solder supply device, welding system and gas blowing

The present invention is related to devices, systems and methods, in particular to a solder supply device, a welding system and an automatic control method for gas blowing.

In order to improve the quality of soldering by removing oxides on the metal surface, rosin or other organic substances are usually added to the solder as flux.

However, during the welding process, these organic substances will be released in the form of smoke after being heated, and the smoke will interfere with welding equipment such as lasers, cameras, and thermometers. Moreover, if the operator inhales these toxic fumes for a long time, the risk of lung disease will be increased.

In order to solve the above problems, existing welding equipment is to add a smoke exhaust device or an air blowing device to disperse the smoke. However, in the above method, a smoke exhaust device or an air blowing device must be added, which increases the risk of interfering with welding in a narrow welding space.

Therefore, the existing welding equipment has the above-mentioned problems, and a more effective solution is urgently needed to be proposed.

The main purpose of the present invention is to provide a solder supply device, a welding system and an automatic control method for blowing gas, so that the same device can be used for supplying solder and blowing gas.

In one embodiment, a solder supply device includes a gas supply tube and a casing. The material gas supply pipe includes a material supply pipe and a gas supply pipe, the material supply pipe is used to transport a solder and is connected to a supply device that supplies the solder, the gas supply pipe is used to transport the flowing gas, and is connected to a device that supplies the flowing gas A gas supply device. The material gas supply pipe is a coaxial pipe, the feed pipe is an inner pipe of the coaxial pipe, the gas supply pipe is an outer pipe of the coaxial pipe, and a gap between the outer pipe and the inner pipe forms a flowing gas transport channel, and the flowing gas transport channel surrounds the periphery of the inner tube. The shell covers the end of the material gas supply pipe, and the shell is provided with an outlet to output the solder and the flowing gas, and the material gas supply pipe penetrates into the inside of the housing from an inlet provided by the case.

In one embodiment, a solder supply device includes a gas supply tube and a casing. The material gas supply pipe includes a material supply pipe and a gas supply pipe, the material supply pipe is used to transport a solder and is connected to a supply device that supplies the solder, the gas supply pipe is used to transport the flowing gas, and is connected to a device that supplies the flowing gas A gas supply device. The housing covers the end of the material gas supply pipe, and the housing is provided with an outlet to output the solder and the flowing gas, and the material gas supply pipe penetrates into the interior of the housing from an inlet provided by the housing, Wherein the wall thickness of the gas supply pipe outside the shell is greater than the wall thickness inside the shell.

In one embodiment, a welding system includes: the above-mentioned solder supply device, a smoke sensing device, a welding device, a material supply device, a gas supply device and connected to the smoke sensing device, the burner A control device for the welding device, the feeding device and the gas supply device. The solder supply device is used to supply the solder to a soldering position. The smoke sensing device is used for sensing a smoke concentration. The welding device is used for heating the welding position. The feeding device is connected to the feeding tube of the solder supply device, and is used to supply the solder. The gas supply device is connected to the gas supply pipe of the solder supply device for supplying the flowing gas. The control device is set to control the air supply device to deliver the flow gas when the smoke concentration meets a smoke exhaust condition, so that the flow gas is discharged from the outlet of the solder supply device to disperse the smoke.

In one embodiment, an automatic control method of air blowing is applied to a welding system, the welding system includes the above-mentioned solder supply device, including: a) providing the solder to a welding position through the solder supply device; b) heating the soldering location to melt the solder; c) sensing a smoke level; and, d) outputting the flowing gas through the solder supply device to reduce the smoke when the smoke level meets a smoke exhaust condition concentration.

The present invention can reduce the volume of the device by integrating the solder supply and air blowing into the same device, and can effectively disperse the smoke caused by welding, thereby improving the welding quality.

A preferred embodiment of the present invention will be described in detail below in conjunction with the drawings.

Please refer to FIG. 1 , which is a structural diagram of a solder supply device according to an embodiment of the present invention. The present invention proposes a solder supply device 1 with a gas inner channel for supplying solder 17 for soldering (such as tin wire or solder of other materials) and blowing air to disperse the smoke.

Specifically, the solder supply device 1 includes a gas supply pipe 10 and a housing 13 . The feed gas supply pipe 10 includes a feed pipe 11 and a gas supply pipe 12 .

The supply pipe 11 is used as a delivery channel for the solder 17 , connected to the supply device 31 (as shown in FIG. 3 ), and used to transport the solder 17 provided by the supply device 31 to the solder supply device 1 for soldering.

In one embodiment, the material of the supply tube 11 includes Teflon. Through the Teflon inner layer with low friction coefficient, the solder 17 can be easily pushed out or withdrawn in the supply tube 11 .

The gas supply pipe 12 is used as a gas transport channel, connected to the gas supply device 32 (as shown in FIG. 3 ), and used to transport the flowing gas (such as high-pressure gas) provided by the gas supply device 32 to the solder supply device 1 for blowing.

The shell 13 covers the end of the gas supply pipe 10 . The casing 13 defines an outlet 14 and an inlet 15 . The gas supply pipe 10 (including the gas supply pipe 11 and the gas supply pipe 12 ) penetrates into the housing 13 from the inlet 15 . Moreover, inside the casing 13 , the material gas supply pipe 10 may be disposed toward the outlet 14 . Thereby, when the material supply device 31 starts to supply material and/or the gas supply device 32 starts to supply gas, the solder 17 and the flowing gas can be output from the outlet 14 .

In one embodiment, the end of the gas supply pipe 15 is opened in the housing 13 and communicates with the outlet 14 through the inner wall of the housing 13, so that the flowing gas discharged from the end of the air supply pipe 15 can flow to the outlet 14 along the inner wall, and Dispel the smoke around exit 14.

In one embodiment, the casing 13 is in the shape of a pen, and the cross-sectional area of one end thereof is gradually reduced to form the outlet 14 (as shown in the left half of FIG. 1 ).

In one embodiment, the diameter of the outlet 14 is larger than the diameter of the solder 17 . The outlet 14 thereby allows the output of the solder 17 and the gas at the same time. For example, when a tin wire with a diameter of 1 mm is used as the solder 17, the diameter of the outlet 14 can be set to 1.3 mm.

In one embodiment, as shown in FIG. 1 , the feed pipe 11 and the air supply pipe 12 may be coaxial pipes. For example, the supply pipe 11 is an inner pipe, and the inner space 18 thereof is used as a channel for transporting solder. Moreover, the air supply pipe 12 is an outer pipe, and the gap 16 between the outer pipe and the inner pipe is used as a flow gas transport channel.

Moreover, the air supply pipe 12 (outer pipe) has higher strength and lower flexibility than the feed pipe 11 (inner pipe), so as to provide protection for the inner pipe.

And, in at least part of the pipeline outside the housing 13 (the pipeline between the solder supply device 1 and the tee joint 51 as shown in FIG. 17 free from being bent.

In one embodiment, as shown in FIG. 1 , the pipeline of the air supply pipe 12 outside the casing 13 has a thicker pipe wall thickness to provide sufficient protection, but after entering the inside of the casing 13, due to the casing 13 With a protective function, the wall thickness of the gas supply pipe 12 can be reduced to reduce the occupied volume.

In one embodiment, as shown in FIG. 1 , the opening of the feed pipe 11 in the housing 13 is not covered by the air supply pipe 12 , that is, the length of the feed pipe 11 in the housing 13 can be greater than that of the air supply pipe 12 in the housing. Body 13 in length.

Specifically, inside the casing 13 , the opening of the gas supply pipe 12 is set at the narrowing position, so that the flowing gas can be discharged from the outlet 14 along the narrowing inner wall. Moreover, the opening of the supply pipe 11 extends to the outlet 14 , so that the solder 17 can be directly squeezed out of the outlet 14 from the opening of the air supply pipe 12 without being stuck by the inner wall of the housing 16 .

The present invention transports the solder 17 and the flowing gas in a coaxial tube, and extends the supply pipe 11 to the opening 14, so as to prevent the high-pressure flowing gas from blowing the solder 17 in the pipeline or the shell 13, causing the solder 17 or The inner wall is damaged.

Please refer to FIG. 2 , which is a structural diagram of a solder supply device according to an embodiment of the present invention. In the embodiment of FIG. 2 , the feed pipe 11 for transporting the solder 17 and the gas supply pipe 12 for transporting the flowing gas are passed through the same or different inlets 15 to the housing 13 through different pipelines, and output through the same outlet 14 Solder 17 with flowing gas.

The present invention can reduce the volume of the device by integrating the solder supply and air blowing into the same device, and can effectively disperse the smoke caused by welding, thereby improving the welding quality.

In one embodiment, the solder supply device 1 can be obtained by modifying an existing tin supply module.

For example, as shown in Figure 1, the existing tin supply module only has a feed tube 12. The present invention can replace the feed tube 12 of the tin supply module with the aforementioned coaxial tube, and can replace the inner tube in the coaxial tube. The tube is connected to a feeding device 31 and the outer tube is connected to an air supply device 32 .

In another example, as shown in FIG. 2, the feed pipe 12 of the tin supply module remains unchanged, but the present invention can be additionally provided with an air supply pipe 12 connected to the air supply device 32 on the tin supply module to Add air blowing function to the tin supply module.

The solder supply device 1 of the present invention can be obtained by modifying an existing tin supply module, thereby greatly saving manufacturing cost and manufacturing time. Moreover, the present invention does not need to change the component specifications of the tin supply module, and can provide lower system complexity.

Please refer to FIG. 1 to FIG. 3 together. FIG. 3 is a structure diagram of a welding system according to an embodiment of the present invention. The present invention also proposes a soldering system, which can perform soldering through the aforementioned solder supply device 1 . Moreover, the welding system of the present invention can sense the smoke concentration during the welding process, and perform air blowing to disperse the smoke when the smoke concentration is too high.

Specifically, the welding system may include the solder supply device 1 with a gas inner flow channel, the material supply device 31, the gas supply device 32, the welding device 33, the smoke sensing device 34 and the connection between the above-mentioned devices. Control device 30 .

The solder supply device 1 is operated to move the outlet 14 to a designated soldering position and supply solder 17 to the soldering position. The solder supply device 1 is also operable to blow air over the soldering site.

The supply device 31 is connected to the supply pipe 11 and supplies the solder 17 to the solder supply device 1 through the supply pipe 11 . In one embodiment, the feeding device 31 can be a tin feeder, and pushes or draws back the tin wire in the feeding tube 11 .

The gas supply device 32 is connected to the gas supply pipe 12 and supplies flowing gas to the solder supply device 1 through the gas supply pipe 12 . The gas supply device 32 may include one or more gas sources for respectively providing different types of flowing gas.

For example, the gas supply device 32 may include a high-pressure gas source, a high-pressure nitrogen source, a normal temperature and high pressure gas source, a high temperature and high pressure gas source, a low temperature and high pressure gas source, a normal temperature and high pressure nitrogen source, a high temperature and high pressure nitrogen source, a low temperature and high pressure nitrogen source or other high pressure gas source. High pressure gas source is used to provide high pressure gas, high pressure nitrogen source is used to provide high pressure nitrogen, normal temperature and high pressure gas source is used to provide normal temperature and high pressure gas, high temperature and high pressure gas source is used to provide high temperature and high pressure gas, low temperature and high pressure gas source is used to provide low temperature and high pressure gas 1. The normal temperature and high pressure nitrogen source is used to provide normal temperature and high pressure nitrogen, the high temperature and high pressure nitrogen source is used to provide high temperature and high pressure nitrogen, and the low temperature and high pressure nitrogen source is used to provide low temperature and high pressure nitrogen.

In one embodiment, the present invention can use the above-mentioned flowing gases with different properties for different purposes in welding. For example, the normal temperature gas can be used to blow away the fumes generated by welding, the high temperature gas can be used to preheat the welding target 40 , the low temperature gas can be used to cool the solder joint after welding, and the nitrogen gas can avoid oxidation reaction or other chemical reactions.

In one embodiment, the present invention can switch the gas source for gas supply by opening and closing electric valves (such as the electric control valve 52 and/or solenoid valve 53 shown in FIG. 5 ), and can control the supply of the switched gas source. Air pressure and air volume.

The soldering device 33 is used to heat the soldering target 40 (such as the solder 17 and/or the soldering pad at the soldering position) to melt the solder 17 , so that the melted solder 17 covers the soldering pad and the pin of the electronic component. The welding device 33 may include a laser module for laser welding, a gas flame module for flame welding, an arc module for arc welding or other welding heating modules.

The smoke sensing device 34 is used to sense the smoke concentration at the welding position.

In one embodiment, the smoke sensing device 34 may include a smoke detector used to sense smoke concentration. Measure smoke concentration.

In one embodiment, the smoke sensing device 34 may include an image capture device 340 (as shown in FIG. 5 ). The image capture device 340 is connected to the control device 30 and can capture a welding position to obtain a welding image. The control device 30 can analyze the welding image through computer vision to calculate the smoke concentration.

The control device 30 is used to control the welding system, and can control the welding system to perform welding and/or an automatic control method of blowing gas described later.

In one embodiment, the control device 30 can be set to control the gas supply device 32 to deliver the flow gas to the solder supply device 1 when the smoke concentration meets the preset smoke exhaust conditions, so that the flow gas flows from the outlet of the solder supply device 1 Exhaust to disperse fumes. The aforementioned smoke exhaust conditions may be that the smoke concentration reaches a preset concentration, the smoke area reaches a preset area or a preset percentage, and the like.

In one embodiment, the control device 30 can be an industrial computer, and can include computer devices such as a processor, an input/output interface, a network interface, and a storage.

Please refer to FIG. 1 to FIG. 4 together. FIG. 4 is a structure diagram of a control device according to an embodiment of the present invention. In the embodiment of FIG. 4 , the control device 30 may include a processor (not shown in the figure), and the processor may include modules 300-304, and these modules 300-304 are respectively configured to implement different functions.

The welding control module 300 is used to control the progress of the welding procedure. Specifically, during the welding process, the welding control module 300 can control the movement and supply of the solder supply device 1 , and can control the heating power of the soldering device 33 .

In one embodiment, the welding control module 300 can obtain one or more welding parameters of the current welding target 40 , and each welding parameter corresponds to the heating power of each welding stage.

Taking the three-stage welding as an example, the first welding power in the first welding stage can make the welding target 40 steadily increase to close to the melting point, the second welding power in the second welding stage can melt the solder 17, and the cooling power in the cooling stage can make the The molten solder 17 is cooled and formed. The aforementioned second welding power may be the highest, followed by the first welding power, and the cooling power may be the lowest or zero.

The preheating control module 301 is used to control the progress of the preheating program. Specifically, before the soldering process, the preheating process is executed to heat the soldering target 40 to a preset operating temperature to reduce the temperature difference between the soldering target 40 (such as the temperature difference between the solder 17 and the pad), and reduce the soldering process. heating time. In the preheating process, the welding control module 300 can control the movement and supply of the solder supply device 1 , and can use the preset preheating power as the heating power of the soldering device 33 .

In one embodiment, the welding control module 300 can obtain one or more preheating parameters of the current welding target 40 , and each of the aforementioned preheating parameters corresponds to the heating power of each preheating stage, ie, the preheating power.

In one embodiment, the aforementioned preheating power is lower than the aforementioned welding power and higher than the cooling power.

The gas blowing control module 302 is used to control switching between different gas sources, so that the solder supply device 1 can blow out different types of flowing gas based on different preset conditions. The air blowing control module 302 can also control parameters such as air supply pressure, air supply volume, and air supply time of the flowing gas.

The smoke analysis module 303 analyzes the smoke concentration and can determine whether the smoke concentration meets the smoke exhaust condition.

In one embodiment, when the smoke sensing device 34 includes a smoke detector, the smoke analysis module 303 can obtain the sensing value of the smoke detector to calculate the smoke concentration.

In one embodiment, when the smoke sensing device 34 includes the image capture device 340 , the smoke analysis module 303 can obtain the welding image captured by the image capture device 340 , and calculate the smoke concentration by analyzing the welding image.

The aforementioned modules 300-303 are connected to each other (which may be electrical connection and information connection), and may be hardware modules (such as electronic circuit modules, integrated circuit modules, SoC, etc.), software modules ( For example, firmware, operating system, or application program) or a mix of software and hardware modules, without limitation.

It is worth mentioning that when the aforementioned modules 300-303 are software modules (such as firmware, operating system or application program), the storage (not shown) of the control device 30 may include non-transitory computer-readable Take the recording medium (not shown in the figure), the above-mentioned non-transitory computer-readable recording medium stores a computer program, and the computer program records a computer-executable program code. After the processor of the control device 30 executes the aforementioned program code, it can realize Do the functions corresponding to modules 300-303.

Please refer to FIG. 1 to FIG. 5 . FIG. 5 is a structure diagram of a welding system according to an embodiment of the present invention. In the embodiment of Fig. 5, the welding system is a laser welding system combined with computer vision.

The welding device 33 may include a laser module 330 and a laser optical path 331 (such as a laser lens). The laser module 330 can be controlled by the control device 30 to emit the laser light L1 to the laser light path 331, and refract and/or reflect the laser light L2 through the laser light path 331 to the welding position where the welding target 40 is located for laser burning. weld.

The soldering target 40 may include pads on a printed circuit board (PCB) 41 , electronic components to be soldered to the printed circuit board 41 and the solder 17 extruded by the solder supply device 1 . The solder supply device 1 can be a tin gun, and the solder 17 can be tin wire.

The smoke sensing device 34 includes an image capturing device 340 . The image capture device 340 includes an optical lens and an image sensor, which can convert the visible light Im1 from the welding position into an image signal Im2, and send the image signal Im2 to the smoke analysis module 303 as a welding image to analyze the welding through computer vision The smoke density of the image.

In one embodiment, the laser module 330 , the laser optical path 331 and the image capture device 340 can be set on the same platform 50 , and the coaxiality of the laser optical path and the image capture optical path can be realized through the arrangement of the light splitting structure. The aforementioned light splitting structure can guide the laser light L1 and L2 of infrared wavelength to the welding position, and guide the visible light Im1 of visible light wavelength to the image capture device 340 .

In one embodiment, the welding system may include a moving device 54 , such as a robot arm, electrically connected to the control device 30 . The moving device 54 is connected to the solder supply device 1 and is used to move the solder supply device 1 so that the outlet 14 is aligned with the soldering position, so that the solder 17 can be squeezed to the soldering position.

Furthermore, the welding control module 300 can send a movement control signal C1 (such as robot coordinates) to the mobile device 54 to control the mobile device 54 to move to a specified position/posture.

In one embodiment, the gas supply pipe 10 of the solder supply device 1 is connected to the tee joint 51 . Through the branching of the three-way joint 51 , the supply pipe 11 is extended and connected to the supply device 31 , and the air supply pipe 12 is extended and connected to the air supply device 32 .

The supply device 31 is connected to the control device 30 , and can supply the solder 17 to the solder supply device 1 or withdraw solder from the solder supply device 1 based on the discharge control signal C4 sent by the solder control module 300 .

In one embodiment, the air supply pipe 12 is connected to the electric control valve 52 and connected to the air supply device 32 through the electric control valve 52 . The electronically controlled valve 52 is connected to the control device 30, and may be, for example, an electronically controlled servo proportional valve, which can adjust the air pressure of the flowing gas in the pipeline based on the proportional control signal C2 sent by the air blowing control module 302 to adjust the blowing rate of the solder supply device 1. The gas supply pressure and gas supply volume of the flowing gas (the higher the pressure, the higher the gas volume flowing out per unit time).

Specifically, the electronically controlled valve 52 is set to reduce the air supply pressure. The present invention reduces the gas supply pressure by setting the electric control valve 52 , which can prevent the welding target 40 from cooling down or blowing the welding target 40 due to excessive gas supply pressure, and avoid waste of gas.

In one embodiment, the gas supply device 32 may include multiple gas sources, such as a high-pressure gas source 320 and a high-temperature gas source 321 . The high-pressure gas source 320 can be used to provide high-pressure flowing gas (such as normal-temperature high-pressure gas), and the high-temperature gas source 321 can be used to provide high-temperature flowing gas (such as high-temperature nitrogen).

Furthermore, the normal temperature and high pressure gas can be used to blow away the smoke, and can make the cooling smoother and improve the quality of the crystal lattice formation. High-temperature nitrogen can preheat the welding position and improve welding stability. In addition, since nitrogen is an inert gas, severe oxidation during welding procedures can be avoided.

In one embodiment, the welding system may include a solenoid valve 53 connected to the control device 30 , and the solenoid valve 53 is connected to multiple gas sources, such as a high-pressure gas source 320 and a high-temperature gas source 321 . The solenoid valve 53 can switch between multiple gas sources based on the switching control signal C3 of the blowing control module 302, so that the designated gas source is connected to the gas supply pipe 12 to provide the corresponding type of flowing gas to the solder supply device 1. The air blowing control module 302 can also control the air supply time and air supply volume through the solenoid valve 53 (the longer the air supply time, the higher the outflow air volume).

In one embodiment, the solenoid valve 53 includes at least three openings and at least three phases. The three openings are respectively connected to the high-pressure gas source 320 , the high-temperature gas source 321 and the gas supply pipe 12 , and the three phases correspond to the gas supply and non-supply states of the two gas sources respectively.

In one embodiment, the solenoid valve 53 can be a five-port three-position solenoid valve, but it is not limited thereto.

In one embodiment, the air blowing control module 302 is set to control the solenoid valve 53 to switch to the high temperature gas source 320 to provide high temperature flowing gas to the solder supply device 1 when the gas heating condition is met, and when the smoke exhaust condition is met When the control solenoid valve 53 is switched to provide high-pressure flow gas to the solder supply device 1 by the high-pressure gas source 320, the control solenoid valve 53 is switched to stop supplying all types of flow gas to the solder when the smoke exhaust condition and the gas heating condition are not satisfied. Supply device 1.

In this way, the control device 30 can control the mobile device 54 to move the solder supply device 1, control the material supply device 31 to provide solder 17 to the solder supply device 1, control the laser module 330 to perform welding, and communicate with the computer through the image capture device 340 Visually detect the real-time smoke level.

Moreover, the control device 30 can switch to the high-pressure gas source 320 through the solenoid valve 53 to start supplying high-pressure flowing gas according to the real-time smoke concentration, adjust the gas supply pressure of the flowing gas through the electric control valve 52, and use the solder supply device The outlet 14 of 1 discharges flowing gas to disperse smog and reduce the concentration of smog.

In one embodiment, the present invention can set different air supply pressures according to different smoke concentrations. Specifically, the present invention can measure in advance the air supply pressure required to reduce the smoke concentration to a preset concentration within a specified air supply time under different smoke concentrations, and set the air supply pressure for each smoke concentration accordingly .

For example, if the smoke concentration is represented by the smoke area, when the smoke area is 11.2 mm2, 30 mm2, and 47 mm2, the minimum air supply pressure required to reduce the smoke area to 3.5 mm2 within 1 second is 0.2 bar, 0.6 bar, 0.8 bar.

Furthermore, the regression relationship between the minimum air supply pressure and the smoke area can be further calculated through the above data, for example: minimum air supply pressure=0.0168*smoke area+0.0383. By inserting different smoke areas into the obtained regression relationship, the corresponding minimum air supply pressure can be obtained.

The slope (0.0168) of the aforementioned regression relation is the gas supply gain value. If the smoke area is lower than the preset area (such as 3.5 mm2), no flowing gas will be supplied (the gas supply gain value is zero).

In one embodiment, the control device 30 can also set different air supply times according to different conditions and situations,

For example, the melting point of tin wire is 250 degrees Celsius. The present invention can measure in advance the blowing time (such as 10 seconds) of high-temperature nitrogen required for preheating to 200 degrees Celsius (working temperature), and set this time as Gas supply time of high temperature nitrogen in thermal program.

In another example, the present invention can measure in advance the blowing time (such as 5 seconds) of normal-temperature high-pressure gas required for cooling down to room temperature (such as 25 degrees Celsius) from the melting point temperature of 250 degrees, and set this time as cooling The gas supply time of the normal temperature and high pressure gas in the stage.

Please refer to FIG. 1 to FIG. 6 at the same time. FIG. 6 is a flowchart of a welding procedure according to an embodiment of the present invention. The present invention also proposes an automatic control method for blowing gas, which is applied to the welding system of any one of the aforementioned embodiments, and the welding system includes the aforementioned solder supply device 1 with a gas inner flow channel.

The automatic control method of the present invention includes steps S10-S15 performed in the welding procedure.

Step S10 : the welding control module 300 supplies the solder 17 to the welding position through the solder supply device 1 .

In one embodiment, the welding control module 300 can control the moving device 54 to move the outlet 14 of the solder supply device 1 to the welding position, and control the supply device 31 to start supplying the solder 17 .

Step S11: The smoke analysis module 303 starts to continuously sense the smoke concentration at the welding position through the smoke sensing device 34 .

Step S12: The welding control module 300 controls the welding device 33 to heat the welding position to melt the solder 17 to start welding.

Step S11 and step S12 can be executed simultaneously or successively, without limitation.

Step S13: The air blowing control module 302 continues to judge whether the current smoke concentration meets the smoke exhaust conditions.

When the smoke sensing device 34 is a smoke detector, the smoke exhaust condition may be that the sensed smoke concentration exceeds a preset concentration.

When the smoke sensing device 34 is an image capture device 34 , the smoke area or the color difference of the smoke can be calculated as the smoke concentration based on the welding image. The smoke area can be obtained by calculating the number of pixels of the smoke image, and the smoke color difference can be obtained by calculating the pixel difference caused by the smoke.

Moreover, the smoke exhaust condition may be that the smoke area exceeds a preset area or a preset percentage of the screen, or the color difference of the smoke reaches a preset pixel difference.

If the smoke concentration meets the smoke exhaust condition, step S14 is executed; otherwise, step S15 is executed.

Step S14: The air blowing control module 30 outputs flowing air through the solder supply device 1 to reduce the smoke concentration.

In one embodiment, the blowing control module 30 can control the solenoid valve 53 to switch to the high-pressure gas source 320 to start supplying gas, and switch to stop supplying gas after the set gas supply time is met. In addition, the air blowing control module 30 can control the electric control valve 52 to adjust the pressure of the flowing air with the set air supply pressure.

Step S15: The welding control module 300 determines whether the welding is completed.

In one embodiment, the welding control module 300 can analyze whether the welding is completed through the welding image captured by the image capture device 34 .

In one embodiment, the welding control module 300 can determine that the welding is completed after all the welding stages (including the welding stage and the cooling stage) are completed.

If the welding is completed, the welding procedure is ended. Otherwise, welding is continued, and step S13 is performed again.

Thereby, the present invention can automatically complete the welding, and can automatically control the air blowing to disperse the smoke during the welding process, so as to improve the welding quality.

Please refer to FIG. 1 to FIG. 7 . FIG. 7 is a flowchart of a preheating procedure according to an embodiment of the present invention. The automatic control method of this embodiment can execute the initial setting (step S20 ) and the preheating procedure (steps S21 - S26 ) before the welding procedure (step S27 ).

Step S20: Execute initialization settings. Specifically, the welding control module 300 can initialize the welding parameters of the welding procedure. The welding parameters can be, for example, the welding power at each stage, the corresponding gas supply type, the single gas supply time, and the gas supply pressure.

Moreover, the preheating control module 301 can initialize the preheating parameters of the preheating program, and the preheating parameters can be, for example, the preheating power and the corresponding air supply type, a single air supply time, and the air supply pressure.

Step S21: The preheating control module 301 determines whether to execute the preheating procedure, for example, whether the current welding target 40 needs the preheating procedure to improve the welding quality, or whether the user has set to execute the preheating procedure.

If it is necessary to execute the preheating program, execute step S22; otherwise, execute step S27.

Step S22 : the air blowing control module 302 controls the electromagnetic valve 53 to switch to provide high temperature flowing gas from the high temperature gas source 321 to the solder supply device 1 .

Step S23: The preheating control module 301 controls the welding device 33 to preheat the welding target 40 with the preheating power, so as to raise the welding target 40 to the working temperature.

It is worth mentioning that step S23 is not a necessary step of the present invention. In one embodiment, step S23 may not be executed, but only steps S24-S25 are executed to realize the preheating function by blowing out high-temperature flowing gas.

Step S24: The gas blowing control module 302 judges that the gas heating condition is satisfied. The gas heating condition may be, for example, that the temperature of the welding target 40 is lower than the preheating target temperature, or the gas blowing action is not completed.

If the gas heating condition is satisfied, execute step S25; otherwise, execute step S26.

Step S25: The air blowing control module 302 controls the opening and closing of the electromagnetic valve 53 based on the preheating parameters to control the air supply time and air supply volume, and controls the electric control valve 52 to adjust the air supply pressure and air supply volume, so as to obtain from the solder supply device 1 Blow out high-temperature flowing gas that meets the preheating parameters to increase the temperature of the soldering target 40 (including the solder 17 ).

Step S26: The preheating control module 301 judges whether the preheating procedure is completed, for example, judges whether the welding target 40 has reached the working temperature.

If the preheating procedure is completed, execute step S26; otherwise, execute step S27.

Next, when the preheating procedure is completed or the preheating procedure does not need to be executed, step S27 is executed: the welding control module 300 executes the welding procedure, for example, steps S10-S15 in FIG. 6 are executed.

The present invention can reduce the temperature difference between the welding target 40 and the environment and improve the welding quality through the execution of the preheating program.

Please refer to FIG. 1 to FIG. 8 together. FIG. 8 is a flow chart of calculating smoke concentration according to an embodiment of the present invention. The automatic control method of this embodiment uses computer vision to detect the generation of welding fumes and the concentration of the fumes, so as to adjust the appropriate gas supply pressure, gas supply volume and/or gas supply time according to different smoke concentrations.

Specifically, in this embodiment, step S11 may include the following steps.

Step S30: The smoke analysis module 303 obtains the background image of the welding position. The above-mentioned background image may be taken before starting welding without including any smoke image.

Step S31: During the welding process, the smoke analysis module 303 obtains a welding image of the welding position.

Next, the smoke analysis module 303 can calculate the smoke area as the smoke concentration based on the current welding image. Specifically, the smoke analysis module 303 can perform the following steps to calculate the smoke concentration.

Step S32: The smoke analysis module 303 performs a subtraction process on the welding image and the background image to obtain a difference image. The pixel value of each pixel of the aforementioned difference image is the pixel difference value of the corresponding position between the welding image and the background image.

In one embodiment, the smoke analysis module 303 may further perform an extraction process (step S33 ) to extract a sub-image corresponding to the welding position from the difference image, so as to exclude areas with little or no correlation with welding.

Specifically, the smoke analysis module 303 obtains the image mask. The aforementioned image mask is set to have at least one group of effective areas, and each effective area corresponds to a welding position.

Next, the smoke analysis module 303 performs an extraction process on the welding image based on the image mask, so as to extract a plurality of pixels in the effective area of the welding image. For example, the smoke analysis module 303 can apply an image mask on the welding image, so that pixel values outside the valid area of the welding image are set as exclusion values (such as 0, 255 or other clearly identifiable values). These excluded pixels will not be included in the calculation of the smoke area.

In this way, the present invention can reduce the amount of data to be processed and improve calculation accuracy.

Step S34: The smoke analysis module 303 calculates the smoke area of a plurality of smoke pixels as the smoke concentration based on the difference image.

In one embodiment, the smoke analysis module 303 recognizes the number and distribution of smoke pixels in the smoke image in the difference image, and calculates the corresponding smoke area as the smoke concentration according to the number and distribution of pixels, such as based on the lens of the image capture device 340 The focal length converts the number and distribution of pixels into an area value in a three-dimensional space.

In one embodiment, the smoke analysis module 303 selects pixels whose value (pixel difference) is greater than a preset difference value in the difference image as smoke pixels.

In one embodiment, the smoke analysis module 303 may calculate the smoke area based on the difference image without capture processing, or calculate the smoke area based on the difference image after capture processing, without limitation.

The invention calculates the smoke concentration through computer vision, can effectively detect whether the smoke affects the optical action (such as laser heating), and can save the installation cost of the smoke detector.

The above descriptions are only preferred specific examples of the present invention, and are not intended to limit the patent scope of the present invention. Therefore, all equivalent changes made by using the content of the present invention are all included in the scope of the present invention in the same way. Chen Ming.

1: Solder supply device 10: Gas supply pipe 11: Feed pipe 12: air supply pipe 13: Shell 14: Export 15: Entrance 16: Gap 17: Solder 18: space 30: Control device 300: welding control module 301: Preheat control module 302: Air blowing control module 303: Smoke analysis module 31: Feeding device 32: Air supply device 320: High pressure gas source 321: High temperature gas source 33: Welding device 330: Laser Module 331: Laser light path 34: Smoke sensing device 340: Image capture device 40: Weld target 41: Circuit printed board L1, L2: laser light Im1: visible light Im2: video signal 50: carrying platform 51: Tee joint 52: Electric control valve 53: Solenoid valve 54: Mobile device C1-C4: control signal S10-S15: Welding steps S20-S27: Preheating steps S30-S34: Smoke concentration calculation steps

FIG. 1 is a structural diagram of a solder supply device according to an embodiment of the present invention.

FIG. 2 is a structural diagram of a solder supply device according to an embodiment of the present invention.

FIG. 3 is a structural diagram of a welding system according to an embodiment of the present invention.

FIG. 4 is a structural diagram of a control device according to an embodiment of the present invention.

FIG. 5 is a structural diagram of a welding system according to an embodiment of the present invention.

FIG. 6 is a flowchart of a welding procedure according to an embodiment of the present invention.

FIG. 7 is a flowchart of a preheating procedure according to an embodiment of the present invention.

FIG. 8 is a flow chart of calculating smoke concentration according to an embodiment of the present invention.

1: Solder supply device 10: Gas supply pipe 11: Feed pipe 12: air supply pipe 13: Shell 14: Export 15: Entrance 16: Gap 17: Solder 18: space

Claims (10)

A solder supply device comprising: A material gas supply pipe, including a material supply pipe and a gas supply pipe, the material supply pipe is used to transport a solder and connected to a supply device that supplies the solder, the gas supply pipe is used to transport the flowing gas, and is connected to supply the flowing gas A gas supply device, wherein the material gas supply pipe is a coaxial pipe, the feed pipe is an inner pipe of the coaxial pipe, the gas supply pipe is an outer pipe of the coaxial pipe, and the distance between the outer pipe and the inner pipe is a gap forming a flow gas transport channel, and the flow gas transport channel surrounds the periphery of the inner tube; and A shell covering the end of the material gas supply pipe, the shell is provided with an outlet to output the solder and the flowing gas, and the material gas supply pipe penetrates into the interior of the housing from an inlet provided by the housing . The solder supply device as described in Claim 1, wherein one end of the feeding tube penetrates into the housing, and the other end is used to connect the feeding device to serve as a transportation channel for the solder between the feeding device and the housing; and Wherein, at least part of the pipeline of the air supply pipe is completely covering the supply pipe, one end of the air supply pipe penetrates into the interior of the housing, and the other end is used for connecting the air supply device. The solder supply device as claimed in item 2, wherein the opening of the supply tube in the casing is not covered by the gas supply tube; Wherein, the length of the feed pipe in the casing is greater than the length of the air supply pipe in the casing; Wherein, the opening of the air supply pipe in the casing communicates with the outlet of the casing through the inner wall of the casing. A solder supply device comprising: A material gas supply pipe, including a material supply pipe and a gas supply pipe, the material supply pipe is used to transport a solder and connected to a supply device that supplies the solder, the gas supply pipe is used to transport the flowing gas, and is connected to supply the flowing gas a gas supply device; and A shell covering the end of the material gas supply pipe, the shell is provided with an outlet to output the solder and the flowing gas, and the material gas supply pipe penetrates into the interior of the housing from an inlet provided by the housing , wherein the pipe wall thickness of the air supply pipe outside the housing is greater than the pipe wall thickness inside the housing. The solder supply device as described in Claim 4, wherein the feed pipe and the gas supply pipe are coaxial pipes; Wherein, the feeding pipe is used as an inner pipe, one end of which penetrates into the housing, and the other end is used to connect the feeding device, so as to serve as a transportation channel for the solder between the feeding device and the housing; and Wherein, at least part of the pipeline of the air supply pipe is completely covered with the feed pipe as an outer pipe, one end of the air supply pipe penetrates into the housing, and the other end is used to connect the air supply device, the feed pipe and the The gaps between the gas supply pipes are used as transport channels for the flowing gas. The solder supply device as described in claim 5, wherein the opening of the supply tube in the casing is not covered by the gas supply tube; Wherein, the length of the feed pipe in the casing is greater than the length of the air supply pipe in the casing; Wherein, the opening of the air supply pipe in the casing communicates with the outlet of the casing through the inner wall of the casing. A welding system comprising: The solder supply device as described in claim 1 or claim 4, used to provide the solder to a soldering position; A smoke sensing device for sensing a smoke concentration; A welding device for heating the welding position; a feeding device connected to the feeding tube of the solder supply device for supplying the solder; a gas supply device connected to the gas supply pipe of the solder supply device for supplying the flowing gas; and A control device, connected to the smoke sensing device, the welding device, the material supply device and the gas supply device, the control device is set to control the gas supply device to deliver the flowing gas so that the flowing gas is discharged from the outlet of the solder supply device to disperse fumes. The welding system as described in claim 7, wherein the smoke sensing device includes an image capture device connected to the control device and used to photograph the welding position to obtain a welding image; The control device includes a smoke analysis module, which is set to calculate a smoke area based on the welding image as the smoke concentration. An automatic control method for air blowing, applied to a welding system, the welding system includes the solder supply device as described in claim 1 or claim 4, including: a) supplying the solder to a soldering location through the solder supply device; b) applying heat to the soldering location to melt the solder; c) sensing a smoke level; and d) When the smoke concentration meets a smoke exhaust condition, output the flowing gas through the solder supply device to reduce the smoke concentration. The automatic control method of blowing as described in claim item 9, wherein the step c) comprises: c1) Obtain a welding image of the welding position; c2) Calculate a smoke area based on the welding image as the smoke concentration.

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