Welding mechanism

Abstract

The application discloses a welding mechanism which comprises a first conductive pipe, a second conductive pipe, an induction coil, a magnetic bar and a cooling sheath, the first and second conductive pipes are arranged at intervals, the cooling sheath is fixed to the ends of the first and second conductive pipes and has a cavity, the ends of the first and second conductive pipes are communicated with the cavity, the cooling medium enters the cavity from the first conductive pipe and flows out of the cavity from the second conductive pipe, the induction coil is electrically connected to the ends of the first and second conductive pipes and is located in the cavity, and the magnetic bar is arranged on the cooling sheath and has an upper end extending into the induction coil and a lower end exposed outside the cooling sheath. Therefore, the cooling sheath with the cavity is arranged, the cooling medium can enter the cavity to simultaneously cool the induction coil and the magnetic bar, and the cooling medium flows out of the cavity from the second conductive pipe; the temperature of the magnetic bar can be effectively reduced during the welding operation, the welding operation can be continuously carried out, and the work efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding equipment, in particular to a welding mechanism. BACKGROUND

[0002] In the circuit board welding process of electronic products, some parts are often inconvenient to be welded on the circuit board by wave soldering or reflow soldering process, and need to be welded by traditional soldering iron in manual or semi-automatic form, or by inductive coil. However, the traditional soldering iron or the use of high-frequency inductive coil welding has its own shortcomings or limitations: the traditional soldering iron generally uses tens of watts of power, and the heating speed is slow. When welding some larger parts or welding points, it takes a long time and the welding efficiency is low. Moreover, the soldering iron tip will naturally be damaged during use, the welding consistency is poor, and the cost of consumables is high. Due to the existence of various shortcomings of soldering iron soldering process, the use of laser soldering machine is gradually increasing, but the cost and price of laser soldering machine are high, and the cost of replacing parts and consumables is also very high. Therefore, laser soldering machines are generally only used in extremely demanding situations.

[0003] In reality, there is also a way of using an inductive coil to heat and weld. The inductive magnetic field generated by the inductive coil is distributed from the outer edge of the ring-shaped coil, which easily heats the range adjacent to the welding position, thus limiting the use. To solve this problem, a magnetic rod is arranged in the inductive coil to conduct the inductive magnetic field with a small diameter magnetic rod to reduce the heating point, which is beneficial to precise welding. However, during the welding operation, the working temperature of the magnetic rod will rapidly rise to the Curie point temperature in seconds, so that continuous welding work cannot be carried out, which seriously affects the welding operation efficiency. Moreover, the current air cooling method cannot achieve the purpose of rapid and effective cooling. Therefore, the existing inductive welding mechanism should be improved to solve the above problems. SUMMARY

[0004] Therefore, in view of the above problems, the present application aims to provide a welding mechanism, which can effectively reduce the temperature of the magnetic rod during welding operation, so that the welding operation can be continuously carried out, and the working efficiency is improved.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The utility model provides a kind of welding mechanism, it includes the first electrically conductive pipe, the second electrically conductive pipe, the induction coil, the magnetic bar and the cooling sheath that can be supplied with cooling medium, the first electrically conductive pipe and the second electrically conductive pipe are spaced apart from each other;The cooling sheath is fixedly connected with the end of the first electrically conductive pipe and the second electrically conductive pipe, and the cooling sheath has a cavity;The end of the first electrically conductive pipe and the second electrically conductive pipe is communicated with the cavity, and the cooling medium enters the cavity from the first electrically conductive pipe and flows out of the cavity from the second electrically conductive pipe;The induction coil is electrically connected to the end of the first electrically conductive pipe and the second electrically conductive pipe, and is located in the cavity;The magnetic bar is mounted on the cooling sheath, and the upper end thereof extends into the induction coil, and the lower end thereof is hidden or exposed in the lower part of the cooling sheath.

[0007] As a preferred scheme: the induction coil is electrically connected to the end of the first electrically conductive pipe and the second electrically conductive pipe.

[0008] As a preferred scheme: the magnetic bar is located inside the induction coil, and a gap for the cooling medium to flow through is formed between the magnetic bar and the induction coil;Insulating glue is provided between the magnetic bar and the induction coil to fixedly connect the two to each other.

[0009] As a preferred scheme: the induction coil includes a coil body and connecting arms connected to the two ends of the coil body, the upper end of the magnetic bar extends into the coil body, and the two connecting arms are correspondingly welded to the first electrically conductive pipe and the second electrically conductive pipe.

[0010] As a preferred scheme: the first electrically conductive pipe and the second electrically conductive pipe are both semicircular, and the inner pipe body of the first electrically conductive pipe and the second electrically conductive pipe is also semicircular;The first electrically conductive pipe and the second electrically conductive pipe are spliced to form a cylindrical shape, and a separation sheet is arranged between the first electrically conductive pipe and the second electrically conductive pipe to separate the two from each other.

[0011] As a preferred scheme: the induction coil includes a coil body and connecting arms connected to the two ends of the coil body, the coil body is a half coil or a multi-coil, the upper end of the magnetic bar extends into the coil body, and the two connecting arms are correspondingly welded and fixed to the inner walls of the first electrically conductive pipe and the second electrically conductive pipe.

[0012] As a preferred scheme: the upper end of the cooling sheath has an annular connecting hole communicating with the cavity, and the end of the first electrically conductive pipe and the second electrically conductive pipe is connected to the annular connecting hole.

[0013] As a preferred scheme: the annular connecting hole is a threaded hole, and threads are provided on the cylindrical outer wall formed by splicing the first electrically conductive pipe and the second electrically conductive pipe, corresponding to the annular connecting hole, and the first electrically conductive pipe and the second electrically conductive pipe are detachably screwed with the annular connecting hole.

[0014] As a preferred scheme: a sealing ring is arranged at the bottom of the annular connecting hole to seal the gap between the end of the first electrically conductive pipe, the second electrically conductive pipe and the cavity.

[0015] As a preferred solution: the magnetic rod is cylindrical and is inserted into the induction coil; the lower end of the magnetic rod is flush with the lower end of the cooling sheath.

[0016] Compared with the prior art, the present application has obvious advantages and beneficial effects, specifically,

[0017] First, by providing a cavity in the cooling sheath, the first and second conductive pipes are respectively communicated with the cavity, and the cooling medium can enter the cavity through the first conductive pipe to cool the induction coil and the magnetic rod, and flow out of the cavity through the second conductive pipe (or enter from the second conductive pipe and flow out from the first conductive pipe through the cavity), thereby forming simultaneous cooling of the induction coil and the magnetic rod; during welding operation, the temperature of the magnetic rod can be effectively reduced, so that the welding operation can be performed for a long time, thereby improving the work efficiency and prolonging the service life of the welding mechanism.

[0018] Second, the first and second conductive pipes are designed as semicircular in shape and internal pipe body structure, and the first and second conductive pipes can be assembled to be cylindrical, so that the overall structure of the welding mechanism is more compact and beautiful; at the same time, the semicircular pipe body structure can accommodate more cooling medium to pass through, thereby improving the flow of cooling medium per unit time, accelerating the removal of heat from the induction coil and the magnetic rod, improving the cooling efficiency, and making the welding mechanism work more stably and efficiently.

[0019] Third, the welding efficiency of the welding mechanism is improved, the induction heating causes the entire welding point to heat up at the same time, and the heating power is much larger than that of a soldering iron, so the heating is faster, the single-point welding time is shortened, and the production efficiency is improved.

[0020] Fourth, the welding mechanism uses a small-diameter magnetic rod, which can reduce the heating point and avoid excessive temperature at positions other than the welding point; if only the induction coil is used to directly heat the welding point, it is possible that the already welded positions around the welding point will also heat up, thereby damaging the already welded welding points; in the present application, the use of the magnetic rod improves the welding accuracy.

[0021] Fifth, the high-frequency induction soldering process has the same non-contact heating advantage as laser soldering, but the price is lower than that of a laser soldering machine, and the laser soldering machine has soldering consumables, while the high-frequency induction soldering machine does not have soldering consumables.

[0022] Sixth, the high-frequency soldering process does not have consumables, while the soldering iron needs to be replaced frequently, and the use of the high-frequency soldering process can save production costs.

[0023] Seventh, when the soldering iron tip is damaged, the production needs to be stopped to replace the soldering iron tip, and it takes several minutes to reheat the soldering iron tip; the high-frequency soldering process avoids the above process and can produce continuously, thereby being more efficient.

[0024] Eighth, the iron mouth gradually damaged in the process of use, become notched or uneven, so, in addition to each time uneven heating, the amount of tin after each welding stick on the iron mouth also varies, so each time the size of the welding spot also has difference, and the magnetic rod and the welding point is not in contact when high frequency welding, effectively avoid the above problems, the consistency of welding is better.

[0025] To make the structural features and effects of the present application clearer, specific embodiments will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a whole three-dimensional schematic view of the welding mechanism of the present application;

[0027] Figure 2 is an exploded three-dimensional schematic view of the welding mechanism of the present application;

[0028] Figure 3 is a sectional view of the cooling sheath of the present application;

[0029] Figure 4 is a three-dimensional structural schematic view of the induction coil of the present application;

[0030] Figure 5 is a whole three-dimensional schematic view of the semi-circular tube type welding mechanism of another embodiment of the present application;

[0031] Figure 6 is an exploded three-dimensional schematic view of the main body part of the semi-circular tube type welding mechanism of another embodiment of the present application; Figure 5

[0032] is a sectional view of the cooling sheath of the semi-circular tube type welding mechanism of another embodiment of the present application. Figure 7 Figure 5 EXPLANATION OF THE DRAWINGS:

[0033] EXPLANATION OF THE DRAWINGS:

[0034] 10, first conductive tube; 20, second conductive tube; 30, induction coil; 31, coil body; 32, connecting arm; 40, magnetic rod; 50, cooling sheath; 51, cavity; 52, through hole; 53, access hole; 54, annular connecting hole; 60, isolation sheet; 70, fixing member; 80, sealing ring; 90, induction welding head; 100, wire and cooling liquid conduit. DETAILED DESCRIPTION

[0035] As shown in the present application, a welding mechanism comprises a first conductive tube 10, a second conductive tube 20, an induction coil 30, a magnetic rod 40 and a cooling sheath 50, wherein: Figures 1 to 7

[0036] ​​The first conductive tube 10 and the second conductive tube 20 are arranged side by side and spaced apart from each other, and a separation sheet 60 is arranged between the first conductive tube 10 and the second conductive tube 20 to insulate and separate them from each other; and a fixing member 70 is arranged outside the first conductive tube 10 and the second conductive tube 20 to fix the positions of the two tubes relative to each other. The first conductive tube 10 and the second conductive tube 20 are hollow inside and can circulate cooling medium such as water or other cooling liquid.

[0037] The induction coil 30 is in a non-fully closed shape, which includes a coil body 31 and connecting arms 32 connected to both ends of the coil body 31. The upper end of the magnetic rod 40 extends into the coil body 31, and the two connecting arms 32 are correspondingly welded to the first conductive tube 10 and the second conductive tube 20, specifically, can be welded to the outer wall, inner wall or end face of the end portion of the first conductive tube 10 and the second conductive tube 20. The connecting arm 32 (in a columnar shape) is welded to the outer wall of the first conductive tube 10 and the second conductive tube 20, which can avoid hindering the flow of cooling medium in the first conductive tube 10 and the second conductive tube 20, improve the flow smoothness of the cooling medium, speed up the flow rate, and improve the heat dissipation efficiency.

[0038] It should be noted that the coil body 31 can be designed in the form of half a circle, one circle or multiple circles according to needs, and can be designed according to needs.

[0039] The cooling sheath 50 is fixedly connected to the end portions of the first conductive tube 10 and the second conductive tube 20, specifically, an access hole 53 is arranged at the upper end of the cooling sheath 50, and the end portions of the first conductive tube 10 and the second conductive tube 20 are inserted into the access hole 53; the cooling sheath 50 has a cavity 51 inside; the end portions of the first conductive tube 10 and the second conductive tube 20 are in communication with the cavity 51 through the access hole 53, and the cooling medium enters the cavity 51 from the first conductive tube 10 and flows out of the cavity 51 from the second conductive tube 20.

[0040] The magnetic rod 40 is mounted on the cooling sheath 50, and the upper end thereof extends into the induction coil 30; the lower end of the cooling sheath 50 is tapered, and a through hole 52 is arranged at the central position of the lower end thereof and is in communication with the cavity 51; the lower end of the magnetic rod 40 protrudes out of the cooling sheath 50 through the through hole 52 and is flush with the lower end of the cooling sheath 50, which can make the magnetic rod 40 as close as possible to the heating point, and the heat energy is more focused, and the heating efficiency is higher; it should be noted that the lower end of the magnetic rod 40 can also be hidden in the lower end of the cooling sheath 50, which can avoid the sealing and waterproof problem between the lower end of the cooling sheath 50 and the lower end of the magnetic rod 40 when the lower end of the magnetic rod 40 protrudes out of the lower end of the cooling sheath 50. Specifically, when the magnetic rod 40 is hidden in the through hole 52, a non-metallic material can be used to seal the lower end of the through hole 52 to improve the overall waterproof performance; or the through hole is not arranged, and the magnetic rod 40 can be directly sealed in the cavity 51.

[0041] Meanwhile, the magnetic rod 40 can also be designed to protrude from the lower end of the cooling sheath 50 on the basis of solving the sealing and waterproofing, so that the magnetic rod 40 is closer to the heating point, further improving the heating efficiency. The lower end of the cooling sheath 50 is designed to be conical, which can reduce the size of the welding mechanism end, reduce the end occupied space, and is conducive to entering the narrow space for welding operation.

[0042] The magnetic rod 40 is located inside the ring body 31, specifically, the magnetic rod 40 is cylindrical, the ring body 31 is circular arc, the diameter of the magnetic rod 40 is smaller than the diameter of the ring body 31, and a gap for the cooling medium to flow through is formed between the magnetic rod 40 and the induction coil 30; the magnetic rod 40 and the induction coil 30 are fixed to each other by using insulating glue.

[0043] It should be noted that the ring body 31 can be fully surrounded or semi-enclosed, and the magnetic rod can be designed as a block or a column according to the extension track of the ring body 31; when the ring body 31 is half circle (semi-enclosed), the magnetic rod can be half circle or elliptical block; or the cross section is circular or elliptical column.

[0044] As a second embodiment of the present application, the first conductive pipe 10 and the second conductive pipe 20 are both semicircular, and the internal pipe body structure of the first conductive pipe 10 and the second conductive pipe 20 is also semicircular; the first conductive pipe 10 and the second conductive pipe 20 are spliced to be cylindrical, and a separation sheet 60 is arranged between the first conductive pipe 10 and the second conductive pipe 20 to separate them from each other, which can be in the form of one or more pieces.

[0045] The induction coil 30 includes a ring body 31 and connecting arms 32 connected to both ends of the ring body 31, the upper end of the magnetic rod 40 extends into the ring body 31, and the two connecting arms 32 are correspondingly welded and fixed on the inner wall of the first conductive pipe 10 and the second conductive pipe 20. Since the internal pipe body structure of the first conductive pipe 10 and the second conductive pipe 20 is semicircular, the cross-sectional area of the pipe body is large, the two connecting arms 32 are designed as sheet-shaped and welded and fixed on the plane inner wall of the pipe body, which will not affect the flow of the cooling medium; moreover, the connecting arms 32 immersed in the cooling medium are all sheet-shaped structures, which can be cooled faster, so that the induction coil 30 can be cooled down faster. In addition, the connecting arms 32 can be connected to the outer wall, inner wall or pipe body end face of the first conductive pipe 10 and the second conductive pipe 20 as needed. It should be noted that when two adjacent welding points close to each other need to be welded, one magnetic rod 40 can be arranged for each welding point, and the two magnetic rods 40 are located inside the ring body 31, and the magnetic rod 40 corresponds to one welding point. Thus, during welding, two welding points can be welded at the same time, improving the welding efficiency. Of course, when there are more than two welding points, the corresponding number of magnetic rods 40 can be arranged corresponding to the number of welding points, and the multiple magnetic rods 40 correspond to multiple welding points one by one.

[0046] The upper end of the cooling jacket 50 has an annular connecting hole 54 communicating with a cavity 51, and the first conductive tube 10 and the second conductive tube 20 are connected to the annular connecting hole 54. The annular connecting hole 54 is a threaded hole, and threads are arranged on the cylindrical outer wall of the first conductive tube 10 and the second conductive tube 20 corresponding to the annular connecting hole 54, and the first conductive tube 10 and the second conductive tube 20 are detachably screwed with the annular connecting hole 54. Alternatively, the first conductive tube 10 and the second conductive tube 20 can be fixedly connected with the cooling jacket 50 by using glue instead of the threaded connection.

[0047] A sealing ring 80 for sealing the gap between the ends of the first conductive tube 10 and the second conductive tube 20 and the cavity 51 is arranged at the bottom of the annular connecting hole 54.

[0048] The first conductive tube 10 and the second conductive tube 20 are designed as semicircular in shape and internal structure, and the first conductive tube 10 and the second conductive tube 20 can be assembled into a cylindrical shape, so that the overall structure of the welding mechanism is more compact, and the semicircular tube structure can accommodate a larger flow of cooling medium to accelerate the heat dissipation efficiency of the welding mechanism.

[0049] The upper ends of the first conductive tube 10 and the second conductive tube 20 are electrically connected to the output end of an induction welding head 90, and a wire and a cooling liquid pipe 100 are connected to the induction welding head 90. The wire and the cooling liquid pipe 100 are connected to the first conductive tube 10 and the second conductive tube 20. Specifically, the wire and the cooling liquid pipe are separated from each other, and then a hose is used to cover them in the hose.

[0050] The working principle of the welding mechanism is as follows: after the heating program starts, the first conductive tube 10 and the second conductive tube 20 form a closed loop with the induction coil 30, the induction magnetic field generated by the induction coil 30 is transmitted through the magnetic rod 40, and the welding point corresponding to the front of the magnetic rod 40 is heated. During the specific welding operation, the lower end of the magnetic rod 40 is aligned with the welding position of the component to be welded, the magnetic rod 40 heats the welding position, and after a set preheating time, the soldering point is fed with solder through an automatic solder feeding mechanism. After the solder feeding is completed, the program stops heating, and the welding is completed. The welding mechanism can be used for welding various metal materials, and can also be used for heat penetration, smelting, heat treatment and other processes.

[0051] The design focus of the present application is,

[0052] First, by setting the cavity 51 in the cooling sheath 50, the first conductive tube 10 and the second conductive tube 20 are respectively communicated with the cavity 51, the cooling medium can enter the cavity 51 through the first conductive tube 10 to cool the induction coil 30 and the magnetic rod 40, and flow out of the cavity 51 from the second conductive tube 20 (or enter from the second conductive tube 20 and flow out from the first conductive tube 10 through the cavity 51), forming simultaneous cooling of the induction coil 30 and the magnetic rod 40; the temperature of the magnetic rod 40 can be effectively reduced during the welding operation, so that the welding operation can be performed for a long time, the work efficiency is improved, and the service life of the welding mechanism is prolonged.

[0053] Second, the first conductive tube 10 and the second conductive tube 20 are designed as semicircular shapes and have a semicircular internal tube structure, the first conductive tube 10 and the second conductive tube 20 can be assembled to be cylindrical, so that the overall structure of the welding mechanism is more compact and beautiful; at the same time, the semicircular tube structure can accommodate more cooling medium, improve the cooling medium flow per unit time, accelerate the removal of heat from the induction coil 30 and the magnetic rod 40, improve the cooling efficiency, and make the welding mechanism work more stably and efficiently.

[0054] Third, the welding efficiency of the welding mechanism is improved, the induction heating causes the entire welding point to heat up at the same time, and the heating power is much larger than that of a soldering iron, so the heating is faster, the single-point welding time is shortened, and the production efficiency is improved.

[0055] Fourth, the welding mechanism uses a small-diameter magnetic rod to reduce the heating point and avoid excessive temperature at positions other than the welding point. If only the induction coil 30 is used to directly heat the welding point, the positions adjacent to the welding point may also heat up, which may damage the already welded welding points. In the present application, the use of the magnetic rod 40 improves the welding accuracy.

[0056] Fifth, the high-frequency induction soldering process has the same non-contact heating advantage as the laser soldering, but the price is lower than that of the laser soldering machine, and the laser soldering machine has welding consumables, while the high-frequency induction soldering machine does not have welding consumables.

[0057] Sixth, the high-frequency welding process does not have consumables, while the soldering iron welding needs to replace the soldering iron nozzle frequently, and the high-frequency welding process saves production cost.

[0058] Seventh, when the soldering iron nozzle is damaged, the production needs to be stopped to replace the soldering iron nozzle, and it takes several minutes to reheat the soldering iron nozzle, and the high-frequency welding process avoids the above process and can produce continuously, which is more efficient.

[0059] Eighth, the tip of the soldering iron will be gradually damaged during use, becoming notched or uneven, so, in addition to each time the uneven heating, the amount of tin adhering to the tip of the soldering iron after each soldering is also inconsistent, so the size of the soldering point after each soldering is also different, and the magnetic rod 40 does not contact the soldering point during high-frequency soldering, effectively avoiding the above problems, and the consistency of soldering is better.

[0060] The above is only the preferred embodiment of the present application, and does not limit the technical scope of the present application in any way, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A welding mechanism characterized by: The utility model discloses a cooling device for inductive coil, which comprises a first conducting pipe, a second conducting pipe, an induction coil, a magnetic bar and a cooling sheath, wherein the first conducting pipe and the second conducting pipe are arranged at intervals; the cooling sheath is fixed to the ends of the first conducting pipe and the second conducting pipe, and has a cavity; the ends of the first conducting pipe and the second conducting pipe are communicated with the cavity, and the cooling medium enters the cavity through the first conducting pipe and flows out of the cavity through the second conducting pipe; the induction coil is electrically connected to the ends of the first conducting pipe and the second conducting pipe and is located in the cavity; the magnetic bar is arranged on the cooling sheath and has an upper end extending into the induction coil and a lower end hidden or exposed below the cooling sheath; the induction coil comprises a coil body and connecting arms connected to the two ends of the coil body, the upper end of the magnetic bar extends into the coil body, and the two connecting arms are correspondingly welded to the first conducting pipe and the second conducting pipe; the first conducting pipe and the second conducting pipe are both semicircular, and the inner pipes of the first conducting pipe and the second conducting pipe are also semicircular; the first conducting pipe and the second conducting pipe are combined into a cylindrical shape, and a separation sheet is arranged between the first conducting pipe and the second conducting pipe to separate them from each other; the upper end of the cooling sheath has an annular connecting hole communicated with the cavity, and the ends of the first conducting pipe and the second conducting pipe are connected to the annular connecting hole.

2. The welding mechanism of claim 1, wherein: The two ends of the induction coil are electrically fixed to the ends of the first conducting pipe and the second conducting pipe.

3. The welding mechanism of claim 1, wherein: The magnetic bar is located inside the induction coil, and a gap for the cooling medium to flow through is formed between the magnetic bar and the induction coil; insulating glue is arranged between the magnetic bar and the induction coil to fix them to each other.

4. The welding mechanism of claim 1, wherein: The induction coil comprises a coil body and connecting arms connected to the two ends of the coil body, the coil body is in the shape of a half circle or multiple circles, the upper end of the magnetic bar extends into the coil body, and the two connecting arms are fixedly welded to the inner walls of the first conducting pipe and the second conducting pipe.

5. The welding mechanism of claim 1, wherein: The annular connecting hole is a threaded hole, and threads are arranged on the cylindrical outer wall formed by the first conducting pipe and the second conducting pipe and corresponding to the annular connecting hole, and the first conducting pipe and the second conducting pipe are detachably screwed with the annular connecting hole.

6. The welding mechanism of claim 5, wherein: A sealing ring is arranged at the bottom of the annular connecting hole to seal the gap between the ends of the first conducting pipe and the second conducting pipe and the cavity.

7. The welding mechanism of claim 1, wherein: The magnetic bar is in the shape of a cylinder and is inserted into the induction coil; the lower end of the magnetic bar is flush with the lower end of the cooling sheath.

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