A detonator primer element welding device

Abstract

The application belongs to the technical field of circuit board welding, and particularly relates to a detonator ignition element welding device, which comprises a bridgewire welding mechanism, an input welding mechanism, a longitudinal pressure applying mechanism and a conveying belt, a PCB is arranged on the conveying belt, the bridgewire welding mechanism and the input welding mechanism are respectively arranged at two ends of the PCB, and the longitudinal pressure applying mechanism is located above the conveying belt. The bridgewire is connected with an ignition carrier plate when the bridgewire is floating, and then the shearing of the excess part of the bridgewire and the welding of the end part are automatically completed in sequence through the descending of the lifting pressure plate. The above scheme can realize the movement required by multiple processes through the segmented extension and contraction of the lifting cylinder, so that the structure is greatly simplified.

Description

Technical Field

[0001] This invention belongs to the field of circuit board welding technology, specifically referring to a welding device for detonator ignition elements. Background Technology

[0002] The ignition elements of an electronic detonator mainly include igniter, electronic control module, lead wire, etc. The electronic control module needs to be pre-programmed with corresponding programs and encrypted codes to ensure precise control of the detonation delay time and detection of ignition performance. When the circuit board executes the detonation program, it ignites the igniter by heating the bridge wire. The bridge wire is a metal wire with an extremely fine diameter, and its material is mostly platinum-iridium alloy, nickel-chromium alloy, etc.

[0003] Because the bridge wire has an extremely small diameter, if both ends have already been welded during the process of fitting with the groove of the ignition carrier plate, even a small impact force may cause the bridge wire to break. This not only increases the difficulty of welding the bridge wire, but also greatly increases the defect rate and the positioning accuracy requirements of the welding device in each axis. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a welding device for detonator ignition elements. In this solution, the bridge wire first connects to the ignition carrier plate while floating. Then, through the descent of the lifting pressure plate, the excess portion of the bridge wire is automatically sheared and the ends are welded. This solution achieves the required movements for multiple processes through the segmented extension and retraction of the lifting cylinder, greatly simplifying the structure. Furthermore, since the ends of the bridge wire are not yet welded when connected to the ignition carrier plate, even a collision will not cause the bridge wire to break, significantly improving the yield rate.

[0005] The working process of the input welding mechanism corresponds to that of the bridge wire welding assembly. By heating the pre-placed solder block, it can automatically complete the welding between the two units of the ignition element.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a welding device for detonator ignition elements, including a bridge wire welding mechanism, an input welding mechanism, a longitudinal pressure mechanism and a conveyor belt. The PCB board is disposed on the conveyor belt. The bridge wire welding mechanism and the input welding mechanism are respectively disposed at both ends of the PCB board. The longitudinal pressure mechanism is located above the conveyor belt.

[0007] The longitudinal pressure mechanism includes a lifting pressure plate, and the bridge wire welding mechanism includes a bridge wire fixing component, a bridge wire welding component, an ignition carrier component, and a carrier mounting component. The bridge wire fixing component and the ignition carrier component are mounted on the PCB board, and the bridge wire welding component and the carrier mounting component are mounted on the lifting pressure plate.

[0008] The bridge wire body is installed by first connecting it to the ignition carrier plate and then welding it. This avoids the problem of the bridge wire body, which is fixed by welding at both ends, breaking due to contact during the installation of the ignition carrier plate.

[0009] The bridge wire fixing assembly includes a bridge wire fixing bracket, a bridge wire solder block, and a bridge wire body. The bridge wire fixing bracket is mounted on the PCB board, the bridge wire solder block is located in the groove of the bridge wire fixing bracket, and both ends of the bridge wire body pass through the central holes of the bridge wire fixing bracket and the bridge wire solder block.

[0010] The bridge wire welding assembly includes a shear fork, a bridge wire welding plate, and a bridge wire feeder. The shear fork is fixedly connected to the lower part of the lifting pressure plate. A tapered guide hole is provided on the outer side of the shear fork. A tapered hole corresponding to the tapered guide hole is provided on the inner side of the bridge wire welding solder block. The bridge wire welding plate is disposed in the shear fork. The bridge wire feeder is fixedly connected to the side of the lifting pressure plate. The extension of the bridge wire body can be controlled by the bridge wire feeder.

[0011] Guided by the tapered holes and tapered guide holes on the bridge wire solder block, the bridge wire body can pass through the bridge wire fixing bracket and the bridge wire solder block with a hole diameter slightly larger than its own, thereby achieving the fixation of the bridge wire body before soldering.

[0012] The ignition carrier assembly includes a fixed base, a mounting base, and an ignition carrier plate. The fixed base is fixed to the PCB board. The mounting base is provided with a mounting post, and the mounting post and the fixed base are interference-fitted. The ignition carrier plate is disposed on the mounting base and is provided with a guide groove. The bridge wire body is located in the guide groove.

[0013] During the process of sending the bridge wire body into the guide groove, because the two ends of the bridge wire body are floating, even if the ignition carrier plate exerts a certain amount of pressure and collision on the bridge wire body, it will not break the bridge wire body.

[0014] The carrier mounting assembly includes a magnetic sleeve, a telescopic rod, and a spring. The telescopic rod is located below the lifting pressure plate. The magnetic sleeve is slidably mounted on the telescopic rod. The spring is located between the magnetic sleeve and the telescopic rod. There is a magnetic attraction between the magnetic sleeve and the mounting column.

[0015] By pressing down in two stages with the shear fork, not only can the excess bridge wire body at both ends be cut off through the relative sliding between the bridge wire fixing bracket and the shear fork, but the bridge wire solder block can also be melted by heating the bridge wire soldering plate, and the two ends of the bridge wire body can be soldered.

[0016] The lifting pressure plate is equipped with a guide rod and a welding switch. The welding switch is located on the lifting drive assembly. When the end of the guide rod contacts the welding switch, the bridge wire welding plate is energized.

[0017] After the lifting plate descends in one stage, it can lower the shear fork to a position coaxial with the through hole of the bridge wire fixing bracket, thus allowing the bridge wire body to pass through. After the lifting plate descends in two stages, it can turn on the welding switch, and simultaneously power on the input welding plate and the bridge wire welding plate. By heating and melting the solder block, the welding of both ends of the bridge wire body and the lead wire is completed.

[0018] The lifting drive assembly includes a fixed plate and a lifting cylinder. The fixed plate is fixed to an external frame, the lifting cylinder is located between the fixed plate and the lifting pressure plate, and the welding switch is located on the fixed plate.

[0019] The input soldering mechanism includes an input pin solder block, a lead wire, and an input soldering plate. The end of the lead wire is stacked on the other end of the PCB board with the input pin solder block. The input soldering plate is located on the lifting pressure plate. When the end of the guide rod contacts the soldering switch, the input soldering plate is powered on.

[0020] The ignition carrier plate and mounting base are made of high-temperature resistant non-magnetic material, and the bridge wire fixing bracket is made of high-temperature resistant material.

[0021] The beneficial effects achieved by the present invention using the above structure are as follows:

[0022] (1) The bridge wire body is installed by first connecting it to the ignition carrier plate and then welding it. This avoids the problem of the bridge wire body, which is fixed by welding at both ends, breaking due to contact during the installation of the ignition carrier plate.

[0023] (2) By guiding the tapered hole and tapered guide hole on the bridge wire solder block, the bridge wire body can pass through the bridge wire fixing bracket and bridge wire solder block with a hole diameter slightly larger than itself, thereby achieving the fixation of the bridge wire body before soldering.

[0024] (3) During the process of sending the bridge wire body into the guide groove, since the two ends of the bridge wire body are floating, even if the ignition carrier plate exerts a certain amount of pressure and collision on the bridge wire body, it will not break the bridge wire body.

[0025] (4) By pressing down the two sections of the shear fork, not only can the excess bridge wire body at both ends be cut by the relative sliding between the bridge wire fixing bracket and the shear fork, but the bridge wire solder block can also be melted by heating the bridge wire soldering plate and the two ends of the bridge wire body can be welded.

[0026] (5) After the first stage of descent, the lifting plate can lower the shear fork to a position coaxial with the through hole of the bridge wire fixing bracket, thereby allowing the bridge wire body to pass through; after the second stage of descent, the lifting plate can turn on the welding switch, and simultaneously power on the input welding plate and the bridge wire welding plate, and complete the welding of both ends of the bridge wire body and the lead wire by heating and melting the solder block. Attached Figure Description

[0027] Figure 1 This is a perspective view of a welding device for a detonator ignition element proposed in this invention;

[0028] Figure 2 This is a front view of a welding device for a detonator ignition element proposed in this invention;

[0029] Figure 3 for Figure 2 A cross-sectional view along section line AA;

[0030] Figure 4 for Figure 3 A cross-sectional view along the cutting line BB;

[0031] Figure 5 for Figure 3 A magnified view of a section at point I;

[0032] Figure 6 for Figure 4 Enlarged view of a section at point II;

[0033] Figure 7 for Figure 1 A magnified view of section III in the middle.

[0034] The components include: 1. Bridge wire welding mechanism; 2. Input welding mechanism; 3. Longitudinal pressure mechanism; 4. Conveyor belt; 5. PCB board; 11. Bridge wire fixing assembly; 12. Bridge wire welding assembly; 13. Ignition carrier assembly; 14. Carrier mounting assembly; 21. Input pin solder block; 22. Lead wire; 23. Input welding board; 31. Lifting pressure plate; 32. Lifting drive assembly; 111. Bridge wire fixing bracket; 112. Bridge wire welding solder block. 113. Bridge wire body; 121. Shear fork frame; 122. Bridge wire welding plate; 123. Bridge wire feeder; 131. Fixed base; 132. Mounting base; 133. Ignition carrier plate; 141. Magnetic sleeve; 142. Telescopic rod; 143. Spring; 311. Guide rod; 312. Welding switch; 321. Fixed plate; 322. Lifting cylinder; 1211. Conical guide hole; 1321. Mounting column; 1331. Guide groove.

[0035] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] like Figures 1-7 As shown, the present invention proposes a welding device for detonator ignition elements, including a bridge wire welding mechanism 1, an input welding mechanism 2, a longitudinal pressure mechanism 3, and a conveyor belt 4. A PCB board 5 is disposed on the conveyor belt 4, the bridge wire welding mechanism 1 and the input welding mechanism 2 are respectively disposed at both ends of the PCB board 5, and the longitudinal pressure mechanism 3 is located above the conveyor belt 4.

[0039] The longitudinal pressure mechanism 3 includes a lifting pressure plate 31, and the bridge wire welding mechanism 1 includes a bridge wire fixing component 11, a bridge wire welding component 12, an ignition carrier component 13, and a carrier mounting component 14. The bridge wire fixing component 11 and the ignition carrier component 13 are mounted on the PCB board 5, and the bridge wire welding component 12 and the carrier mounting component 14 are mounted on the lifting pressure plate 31.

[0040] The bridge wire body 113 is installed by first connecting it to the ignition carrier plate 133 and then welding it. This avoids the problem of the bridge wire body 113, which is fixed by welding at both ends, breaking due to contact during the installation of the ignition carrier plate 133.

[0041] The bridge wire fixing assembly 11 includes a bridge wire fixing bracket 111, a bridge wire solder block 112, and a bridge wire body 113. The bridge wire fixing bracket 111 is disposed on the PCB board 5, the bridge wire solder block 112 is disposed in the groove of the bridge wire fixing bracket 111, and the two ends of the bridge wire body 113 pass through the central holes of the bridge wire fixing bracket 111 and the bridge wire solder block 112.

[0042] The bridge wire welding assembly 12 includes a shear fork 121, a bridge wire welding plate 122, and a bridge wire feeder 123. The shear fork 121 is fixedly connected to the lower part of the lifting pressure plate 31. A tapered guide hole 1211 is provided on the outer side of the shear fork 121. A tapered hole corresponding to the tapered guide hole 1211 is provided on the inner side of the bridge wire welding solder block 112. The bridge wire welding plate 122 is disposed in the shear fork 121. The bridge wire feeder 123 is fixedly connected to the side of the lifting pressure plate 31. The extension of the bridge wire body 113 can be controlled by the bridge wire feeder 123.

[0043] Guided by the tapered hole and tapered guide hole 1211 on the bridge wire solder block 112, the bridge wire body 113 can pass through the bridge wire fixing bracket 111 and the bridge wire solder block 112 with a hole diameter slightly larger than its own, thereby achieving the fixation of the bridge wire body 113 before soldering.

[0044] The ignition carrier assembly 13 includes a fixed base 131, a mounting base 132, and an ignition carrier plate 133. The fixed base 131 is fixed to the PCB board 5. The mounting base 132 is provided with a mounting post 1321. The mounting post 1321 and the fixed base 131 are interference-fitted. The ignition carrier plate 133 is provided on the mounting base 132. The ignition carrier plate 133 is provided with a guide groove 1331. The bridge wire body 113 is located in the guide groove 1331.

[0045] During the process of sending the bridge wire body 113 into the guide groove 1331, because the two ends of the bridge wire body 113 are floating, even if the ignition carrier plate 133 exerts a certain amount of pressure and collision on the bridge wire body 113, it will not break the bridge wire body 113.

[0046] The carrier mounting assembly 14 includes a magnetic sleeve 141, a telescopic rod 142, and a spring 143. The telescopic rod 142 is located below the lifting pressure plate 31. The magnetic sleeve 141 is slidably mounted on the telescopic rod 142. The spring 143 is located between the magnetic sleeve 141 and the telescopic rod 142. There is a magnetic attraction between the magnetic sleeve 141 and the mounting post 1321.

[0047] By pressing down in two stages with the shear fork 121, not only can the excess bridge wire body 113 at both ends be cut through the relative sliding between the bridge wire fixing bracket 111 and the shear fork 121, but the bridge wire solder block 112 can also be melted by heating the bridge wire soldering plate 122, and the two ends of the bridge wire body 113 can be soldered.

[0048] The input soldering mechanism 2 includes an input pin solder block 21, a lead wire 22, and an input soldering plate 23. The end of the lead wire 22 is stacked on the other end of the PCB board 5 with the input pin solder block 21. The input soldering plate 23 is located on the lifting pressure plate 31. When the end of the guide rod 311 contacts the soldering switch 312, the input soldering plate 23 is powered on.

[0049] The lifting pressure plate 31 is provided with a guide rod 311 and a welding switch 312. The welding switch 312 is located on the lifting drive assembly 32. When the end of the guide rod 311 contacts the welding switch 312, the bridge wire welding plate 122 is energized.

[0050] After a first descent, the lifting plate 31 can lower the shear fork 121 to a position coaxial with the through hole of the bridge wire fixing bracket 111, thereby allowing the bridge wire body 113 to pass through. After a second descent, the lifting plate 31 can turn on the welding switch 312, and simultaneously power on the input welding plate 23 and the bridge wire welding plate 122. By heating and melting the solder block, the welding of both ends of the bridge wire body 113 and the lead wire 22 is completed.

[0051] The lifting drive assembly 32 includes a fixed plate 321 and a lifting cylinder 322. The fixed plate 321 is fixed to the external frame, the lifting cylinder 322 is located between the fixed plate 321 and the lifting pressure plate 31, and the welding switch 312 is located on the fixed plate 321.

[0052] The ignition carrier plate 133 and the mounting base 132 are made of high-temperature resistant non-magnetic material, and the bridge wire fixing bracket 111 is made of high-temperature resistant material.

[0053] In practical use, the PCB board 5 array is placed on the conveyor belt 4 and fixed by suction cups or other means. If several groups of PCB boards 5 are arranged in a horizontal array on the conveyor belt 4, and the bridge wire welding assembly 12, carrier mounting assembly 14 and input welding mechanism 2 are also arranged in a corresponding array, the welding process of multiple PCB boards 5 can be completed at one time by the lifting control of a set of longitudinal pressure mechanism 3.

[0054] The PCB board 5 is longitudinally conveyed by the conveyor belt 4. In the initial state, the lifting pressure plate 31 is at the highest point. At this time, the mounting base 132 is temporarily fixed by the magnetic attraction between the mounting column 1321 and the magnetic sleeve 141. The loading of the mounting base 132 can be completed by external mechanical grippers.

[0055] Then, the lifting cylinder 322 extends to drive the lifting pressure plate 31 to complete the first section of descent. At this time, the mounting column 1321 is inserted into the fixed seat 131, and the connection is completed through the interference fit between the two.

[0056] At the same time, the shear fork 121 descends to a specific height, at which point the through holes of the shear fork 121, the bridge wire fixing bracket 111, and the bridge wire solder block 112 are all coaxial;

[0057] Then, the bridge wire body 113 is slowly fed out by the bridge wire feeder 123. Since there is a tapered guide hole 1211 on the outer side of the shear fork 121 and a tapered hole corresponding to the tapered guide hole 1211 on the inner side of the bridge wire solder block 112, the end of the bridge wire body 113 will pass through the two sets of shear forks 121, the bridge wire fixing bracket 111 and the bridge wire solder block 112 under the guidance of the tapered hole and extend a certain distance.

[0058] During this process, the bridge wire body 113 will also pass through the guide groove 1331 on the ignition carrier plate 133. During the connection between the bridge wire body 113 and the guide groove 1331, since the two ends of the bridge wire body 113 are not welded and fixed, even if there is a collision between the two, the bridge wire body 113 will not be broken.

[0059] The lifting pressure plate 31 continues to descend in two stages by extending the lifting cylinder 322. At this time, since the mounting base 132 can no longer descend, the carrier mounting assembly 14 will retract.

[0060] At the same time, when the shear fork 121 descends relative to the bridge wire fixing bracket 111, it can cut the portions of the bridge wire body 113 that extend beyond the bridge wire fixing bracket 111 at both ends. On the one hand, it can disconnect the bridge wire body 113 that has been installed and the bridge wire feeder 123, and on the other hand, it can remove the excess portion.

[0061] When the lifting plate 31 descends to the lowest point, the end of the guide rod 311 contacts and turns on the welding switch 312. At this time, the input welding plate 23 and the bridge wire welding plate 122 are energized and heat the input pin solder block 21 and the bridge wire welding solder block 112 respectively.

[0062] Since the melting points of the bridge wire solder block 112 and the input pin solder block 21 are much lower than those of other surrounding components, the input pin solder block 21 will melt and complete the soldering between the input pin and the lead wire 22 of the PCB board 5, and the bridge wire solder block 112 will melt and complete the soldering between the bridge wire body 113 and the bridge wire fixing bracket 111.

[0063] After welding is completed, the lifting cylinder 322 retracts and lifts the pressure plate 31 back to its highest point, and the welded PCB board 5 is transferred to the work station via the conveyor belt 4.

[0064] In subsequent processes not shown in this scheme, the ignition powder needs to be installed on the ignition carrier plate 133. After installation, the center of the bridge wire body 113 is located inside the ignition powder, so the ignition powder can be ignited after the bridge wire body 113 is energized and heated.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0066] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A welding device for detonator ignition elements, characterized in that: It includes a bridge wire welding mechanism (1), an input welding mechanism (2), a longitudinal pressure mechanism (3), and a conveyor belt (4). The PCB board (5) is placed on the conveyor belt (4). The bridge wire welding mechanism (1) and the input welding mechanism (2) are respectively placed at both ends of the PCB board (5). The longitudinal pressure mechanism (3) is located above the conveyor belt (4). The longitudinal pressure mechanism (3) includes a lifting pressure plate (31), and the bridge wire welding mechanism (1) includes a bridge wire fixing assembly (11), a bridge wire welding assembly (12), an ignition carrier assembly (13), and a carrier mounting assembly (14). The bridge wire fixing assembly (11) and the ignition carrier assembly (13) are mounted on the PCB board (5), and the bridge wire welding assembly (12) and the carrier mounting assembly (14) are mounted on the lifting pressure plate (31). The bridge wire fixing assembly (11) includes a bridge wire fixing bracket (111), a bridge wire solder block (112), and a bridge wire body (113). The bridge wire fixing bracket (111) is disposed on the PCB board (5), the bridge wire solder block (112) is disposed in the groove of the bridge wire fixing bracket (111), and the two ends of the bridge wire body (113) pass through the central holes of the bridge wire fixing bracket (111) and the bridge wire solder block (112). The bridge wire welding assembly (12) includes a shear fork (121), a bridge wire welding plate (122), and a bridge wire feeder (123). The shear fork (121) is fixedly connected to the lower part of the lifting pressure plate (31). A tapered guide hole (1211) is provided on the outer side of the shear fork (121). A tapered hole corresponding to the tapered guide hole (1211) is provided on the inner side of the bridge wire welding solder block (112). The bridge wire welding plate (122) is located in the shear fork (121). The bridge wire feeder (123) is fixedly connected to the side of the lifting pressure plate (31). The extension of the bridge wire body (113) can be controlled by the bridge wire feeder (123). The ignition carrier assembly (13) includes a fixed base (131), a mounting base (132), and an ignition carrier plate (133). The fixed base (131) is fixed to the PCB board (5). The mounting base (132) is provided with a mounting post (1321). The mounting post (1321) and the fixed base (131) are interference-fitted. The ignition carrier plate (133) is located on the mounting base (132). The ignition carrier plate (133) is provided with a guide groove (1331). The bridge wire body (113) is located in the guide groove (1331). The carrier mounting assembly (14) includes a magnetic sleeve (141), a telescopic rod (142), and a spring (143). The telescopic rod (142) is located below the lifting pressure plate (31). The magnetic sleeve (141) is slidably mounted on the telescopic rod (142). The spring (143) is located between the magnetic sleeve (141) and the telescopic rod (142). There is a magnetic attraction between the magnetic sleeve (141) and the mounting post (1321). The lifting pressure plate (31) is provided with a guide rod (311) and a welding switch (312). The welding switch (312) is located on the lifting drive assembly (32). When the end of the guide rod (311) contacts the welding switch (312), the bridge wire welding plate (122) is energized.

2. The detonator ignition element welding device according to claim 1, characterized in that: The lifting drive assembly (32) includes a fixed plate (321) and a lifting cylinder (322). The fixed plate (321) is fixed to the external frame. The lifting cylinder (322) is located between the fixed plate (321) and the lifting pressure plate (31). The welding switch (312) is located on the fixed plate (321).

3. The detonator ignition element welding device according to claim 2, characterized in that: The input welding mechanism (2) includes an input pin solder block (21), a lead wire (22) and an input welding plate (23). The end of the lead wire (22) is stacked with the input pin solder block (21) on the other end of the PCB board (5). The input welding plate (23) is located on the lifting pressure plate (31). When the end of the guide rod (311) contacts the welding switch (312), the input welding plate (23) is powered on.

4. The detonator ignition element welding device according to claim 3, characterized in that: The ignition carrier plate (133) and the mounting base (132) are made of high-temperature resistant non-magnetic material, and the bridge wire fixing bracket (111) is made of high-temperature resistant material.

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