Welding jig for pulse molded capacitor

Abstract

The utility model discloses a welding jig for a pulse molded capacitor. The pulse molded capacitor comprises a plurality of capacitor bodies arranged at intervals, two connecting frames oppositely arranged on the two sides of the plurality of capacitor bodies and a plurality of molded shells wrapping the peripheries of the plurality of capacitor bodies respectively. The welding jig comprises an upper welding plate, a lower welding plate, a lower mounting cavity and an upper mounting cavity, wherein the upper welding plate and the lower welding plate are oppositely arranged up and down; the lower mounting cavity is formed in the lower welding plate and is used for mounting a capacitor body; the two mounting grooves are respectively formed in the top surface of the lower welding plate and are used for mounting the two connecting frames; the two positioning mechanisms are oppositely arranged on two sides of the capacitor body and are respectively used for fixing the two connecting frames; the structure of the welding jig is specifically limited, the positioning mechanism is arranged to position and fix the connecting frame so as to ensure that the multiple capacitor bodies and the connecting frame can be welded and formed at a time, and the welding quality is stable.

Description

Technical Field

[0001] The utility model belongs to the field of capacitor preparation, and in particular relates to a welding jig for pulse molded capacitors. Background Art

[0002] Pulse capacitors store the energy charged by a low-power source over a long period of time. When needed, they rapidly release this energy in a very short time interval, generating a powerful surge current and surge power. They are primarily used in high-voltage testing, high-energy physics, laser technology, oscillation circuits, geological prospecting, and other fields. However, existing pulse capacitors are often subject to external vibrations, which can easily cause internal power components to disconnect or become damaged, hindering their usefulness and requiring further improvement. Summary of the Invention

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a welding jig for pulse molded capacitors.

[0004] The utility model adopts the following technical solutions:

[0005] A welding jig for a pulse molded capacitor, comprising a plurality of capacitor bodies spaced apart, two connecting frames disposed oppositely on either side of the plurality of capacitor bodies, and a plurality of molded shells respectively wrapped around the peripheries of the plurality of capacitor bodies. The capacitor bodies comprise two capacitor chips disposed oppositely in an upper and lower direction. A connecting piece is formed on the inner side of the connecting frame, opposite to the plurality of capacitor bodies, and disposed between the ends of the two capacitor chips.

[0006] The welding jig includes an upper welding plate and a lower welding plate arranged opposite to each other, a lower mounting cavity formed in the lower welding plate for mounting the capacitor body, an upper mounting cavity arranged on the upper welding plate opposite to the lower mounting cavity, two mounting grooves respectively arranged on the top surface of the lower welding plate for mounting two connecting frames, and two positioning mechanisms respectively arranged on both sides of the capacitor body for fixing the two connecting frames.

[0007] Furthermore, the positioning mechanism includes an upper positioning block and a lower positioning block that are relatively arranged up and down, and a positioning piece arranged between the upper positioning block and the lower positioning block, and the connecting frame is fixed between the upper positioning block and the lower positioning block.

[0008] Furthermore, the lower end side surface of the upper positioning block is formed with an inwardly inclined upper inclined surface, and the upper end side surface of the lower positioning block is formed with an inwardly inclined lower inclined surface, and the upper inclined surface and the lower inclined surface constitute a blocking groove opposite to the end of the capacitor body.

[0009] Furthermore, the positioning member includes two lower positioning holes relatively arranged at both ends of the lower positioning block, two upper positioning holes relatively arranged at both ends of the upper positioning block and opposite to the two lower positioning holes, two positioning magnets respectively arranged in the two lower positioning holes, and two positioning bolts respectively passing through the two upper positioning holes and cooperating with the relative positioning magnets.

[0010] Furthermore, the lower mounting cavity includes a horizontal section arranged horizontally for mounting the capacitor body and two vertical sections arranged relatively on both sides of the horizontal section, and both sides of the lower positioning block extend into the two vertical sections respectively.

[0011] Furthermore, the two positioning bolts are located in the vertical section, and the upper mounting cavity is formed with two clearance holes opposite to the two vertical sections for the positioning bolts to pass through.

[0012] Furthermore, a plurality of upper heat dissipation holes are arranged at intervals on the upper positioning block, and a plurality of lower heat dissipation holes are arranged at intervals on the lower positioning block.

[0013] Furthermore, the bottom surface of the lower mounting cavity is formed with a plurality of lower positioning grooves extending downward for mounting capacitor chips, and the top surface of the upper mounting cavity is formed with a plurality of upper positioning grooves extending upward, and the plurality of lower positioning grooves correspond to the plurality of upper positioning grooves one by one.

[0014] Furthermore, the upper welding block is provided with multiple upper heat conducting members opposite to the multiple upper positioning grooves, and the upper heat conducting members include two upper strip heat conducting holes arranged on both sides of the upper positioning grooves, and the upper strip heat conducting holes are partially overlapped and connected with the upper heat dissipation holes.

[0015] Furthermore, it also includes a limiting member arranged between the upper welding plate and the lower welding plate, and the limiting member includes two limiting columns arranged on both sides of the lower welding plate and two limiting holes arranged on the upper welding plate for the two limiting columns to be embedded.

[0016] From the above description of the utility model, it can be seen that compared with the prior art, the beneficial effects of the utility model are: this application limits the structure of the pulse molded capacitor, and connects multiple capacitor bodies in parallel by a connecting frame to ensure that the molded capacitor has a certain structural strength, and provides a molded shell to cover multiple capacitor bodies to protect the capacitor chip from stress impact, and has extremely strong shock resistance and environmental adaptability; in addition, the structure of the welding jig is specifically limited, and a positioning mechanism is provided to position and fix the connecting frame to ensure that multiple capacitor bodies and the connecting frame can be welded into shape at one time, and the welding quality is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the structural diagram of the pulse molded capacitor;

[0018] Figure 2 This is a schematic diagram of the exploded pulse molded capacitor;

[0019] Figure 3 This is a structural diagram of the welding fixture;

[0020] Figure 4 This is an exploded diagram of the welding jig;

[0021] Figure 5 Schematic diagram of the structure of the upper welding plate;

[0022] Figure 6 for Figure 4 A magnified view of the middle part of the structure;

[0023] Figure 7 It is a structural diagram of the original framework;

[0024] In the figure, 1-capacitor body, 2-connecting frame, 3-molded shell, 4-welding fixture, 6-original frame, 11-capacitor chip, 21-connecting piece, 41-upper welding plate, 411-upper thermal hole, 42-lower welding plate, 43-lower mounting cavity, 431-horizontal section, 432-vertical section, 433-lower positioning groove, 44-upper mounting cavity, 441-upper positioning groove, 442-allowing hole, 45-mounting groove, 46-positioning machine Structure, 461-upper positioning block, 462-lower positioning block, 463-positioning piece, 4631-lower positioning hole, 4632-upper positioning hole, 4633-positioning magnet, 4634-positioning bolt, 464-upper inclined surface, 465-lower inclined surface, 466-blocking groove, 467-upper heat dissipation hole, 468-lower heat dissipation hole, 47-limiting piece, 471-limiting column, 472-limiting hole, 61-frame body, 62-positioning hole. DETAILED DESCRIPTION

[0025] The present invention is further described below through specific implementation methods.

[0026] Reference Figures 1 to 2 As shown, a pulse molded capacitor includes a plurality of capacitor bodies 1 arranged at intervals, two connecting frames 2 relatively arranged on both sides of the plurality of capacitor bodies 1, and a plurality of molded shells 3 respectively wrapped around the outer circumference of the plurality of capacitor bodies 1, wherein the capacitor body 1 includes two capacitor chips 11 relatively arranged in an upper and lower direction, and a connecting piece 21 opposite to the plurality of capacitor bodies 1 is formed on the inner side surface of the connecting frame 2; specifically, the capacitor chip 11 includes a capacitor chip body and two end electrodes relatively arranged at both ends of the capacitor chip, and the connecting piece 21 is arranged between the upper and lower opposite end electrodes; further, the molded shell 3 adopts an epoxy resin molded shell to protect the capacitor chip 11 from stress impact and improve adaptability to various environments.

[0027] The production process is as follows:

[0028] Step 1: Connect and fix multiple capacitor bodies 1 to the original frame 6 using a welding jig 4, and then send them into reflow soldering to weld the multiple capacitor bodies 1 to the original frame 6 to form a semi-finished capacitor;

[0029] Step 2: Send the welding jig 4 holding the semi-finished capacitor into the cleaning device 5, and clean the welding jig 4 and the semi-finished capacitor by rotating the welding jig 4;

[0030] Step three, demold the semi-finished capacitor from the welding jig 4 and send it into the molding device, so that the outer periphery of multiple capacitor bodies 1 is wrapped with the molded shell 3, and then cut off the excess part of the original frame 6, so that the original frame 6 forms the two connecting frames 2 to obtain a pulse molded capacitor.

[0031] Among them, reference Figure 7 As shown, the original frame 6 includes a frame body 61 and positioning holes 62 spaced apart on the frame body 61 and opposite to the plurality of capacitor bodies 1 . Specifically, the two inner side surfaces of the positioning holes 62 opposite to the ends of the capacitor body 61 extend inward to form connecting pieces 21 .

[0032] Reference Figures 3 to 6 As shown, the welding jig 4 includes an upper welding plate 41 and a lower welding plate 42 arranged opposite to each other in the upper and lower directions, a lower mounting cavity 43 formed in the lower welding plate 42 for mounting the capacitor body 1, an upper mounting cavity 44 arranged on the upper welding plate 41 opposite to the lower mounting cavity 43, two mounting grooves 45 respectively arranged on the top surface of the lower welding plate 42 for mounting two connecting frames 2, two positioning mechanisms 46 respectively arranged on both sides of the capacitor body 1 for fixing the two connecting frames 2, and a limiter 47 arranged between the upper welding plate 41 and the lower welding plate 42.

[0033] The lower mounting cavity 43 includes a horizontal section 431 horizontally arranged for mounting the capacitor body 1 and two vertical sections 432 relatively arranged on both sides of the horizontal section 431. Specifically, the bottom surface of the horizontal section 431 is formed with a plurality of lower positioning grooves 433 extending downward for mounting the capacitor chip 11. Correspondingly, the top surface of the upper mounting cavity 44 is formed with a plurality of upper positioning grooves 441 extending upward, and the plurality of lower positioning grooves 433 correspond one-to-one to the plurality of upper positioning grooves 441.

[0034] The positioning mechanism 46 includes an upper positioning block 461 and a lower positioning block 462 arranged opposite to each other in the upper and lower directions, and a positioning member 463 arranged between the upper positioning block 461 and the lower positioning block 462. The connecting frame 2 is fixed between the upper positioning block 461 and the lower positioning block 462; wherein, the lower end side surface of the upper positioning block 461 is formed with an upper inclined surface 464 extending obliquely inward, and the upper end side surface of the lower positioning block 462 is formed with a lower inclined surface 465 obliquely inward, so that a blocking groove 466 opposite to the end of the capacitor body 1 is formed between the upper inclined surface 464 and the lower inclined surface 465 arranged above and below. The blocking groove 466 can prevent the molten solder from flowing outward through the gap between the two positioning blocks when the capacitor body 1 is welded to the connecting frame 2, and the solder overflowing from between the two capacitor chips 11 will form a certain shape between the sides of the two capacitor chips 11 under the action of the blocking groove 466, thereby increasing the welding area and effectively improving the welding quality. Specifically, the upper positioning block 4 61 is provided with a plurality of upper heat dissipation holes 467 at intervals, and a plurality of lower heat dissipation holes 468 are provided on the lower positioning block 462 at intervals. With the plurality of upper heat dissipation holes 467 and the plurality of lower heat dissipation holes 468, the heat generated during the welding process can be dissipated through the upper heat dissipation holes 467 and the lower heat dissipation holes 468, so as to prevent the fixture from absorbing too much heat, thereby affecting the service life of the fixture; further, the upper welding plate 41 is provided with a plurality of upper heat-conducting parts opposite to the plurality of upper positioning grooves 441, and the upper heat-conducting parts include two upper strip-shaped heat-conducting holes 411 arranged on both sides of the upper positioning groove 441 relative to each other, and the upper strip-shaped heat-conducting holes 411 are partially overlapped and connected with the relative upper heat dissipation holes 467, so that during reflow soldering, the hot air can be quickly transferred to the frame, and then transferred to the soldering point position through the connecting frame 2, thereby effectively improving the welding efficiency and shortening the welding time; in addition, the lower welding plate 42 is also provided with a plurality of lower heat-conducting parts, and the setting method thereof is the same as that of the upper heat-conducting parts, and its specific structure will not be further described here.

[0035] The positioning member 463 includes two lower positioning holes 4631 arranged at both ends of the lower positioning block 462, two upper positioning holes 4632 arranged at both ends of the upper positioning block 461 and opposite to the two lower positioning holes 4631, two positioning magnets 4633 respectively arranged in the two lower positioning holes 4631, and two positioning bolts 4634 respectively passing through the two upper positioning holes 4632 and cooperating with the relative positioning magnets 4633; wherein, the two positioning bolts 4634 are respectively located in the opposite vertical sections 432, and the upper mounting cavity 44 is formed with two clearance holes 442 respectively opposite to the two vertical sections 432 for the positioning bolts 4634 to pass through; by providing the positioning bolts 44634 and cooperating with the positioning magnets 4633, clamping stress is provided to prevent the upper positioning block 461 and the lower positioning block 462 from moving out of position and affecting the quality of welding.

[0036] The limiting member 47 includes two limiting posts 471 relatively arranged on both sides of the lower welding plate 42 and two limiting holes 472 arranged on the upper welding plate 41 for the two limiting posts 471 to be embedded in. Through the cooperation between the limiting posts 471 and the limiting holes 472, the upper welding plate 41 and the lower welding plate 42 can be quickly molded together. Due to the weight of the welding plate itself, only the cooperation between the limiting posts 471 and the limiting holes 472 can ensure that the upper welding plate 41 and the lower welding plate 42 are not easily displaced after the mold is closed.

[0037] The welding process specifically includes the following steps:

[0038] A. Place individual capacitor chips 11 into the multiple lower positioning grooves 433 one by one, and then place the two lower positioning blocks 462 close to both sides of the multiple capacitor chips 11;

[0039] B. First, apply solder to the top and bottom surfaces of the multiple connecting pieces 21, and then insert the two ends of the original frame 6 into the opposite mounting grooves 45, so that the bottom surfaces of the multiple connecting pieces 21 are in contact with the top surfaces of the terminal electrodes of the multiple capacitor chips 11;

[0040] C. Stacking multiple capacitor chips on the upper ends of the multiple capacitor chips 11 so that the ends of the multiple capacitor chips 11 located on the upper sides are in contact with the top surfaces of the multiple connecting pieces 21;

[0041] D. Place the two upper positioning blocks 461 against the two sides of the multiple capacitor chips 11 located above, and use the positioning bolts 4634 and the relative positioning magnets 4633 to fix the upper and lower positioning blocks 461 and 462 on the two sides of the capacitor body 1 respectively;

[0042] E. Cover the upper welding plate 41 on the top surface of the lower welding plate 42, so that the limiting column 471 is embedded in the relative limiting hole 472. At the same time, the multiple capacitor chips 11 located above can be embedded in the relative upper positioning groove 441 to complete the connection and fixation of the multiple capacitor bodies 1 and the original frame 6, and then send it into the reflow soldering to weld the multiple capacitor bodies 1 to the original frame 6 to form a semi-finished capacitor.

[0043] The present application limits the structure of the pulse molded capacitor, and connects multiple capacitor bodies 1 in parallel by a connecting frame 2 to ensure that the molded capacitor has a certain structural strength, and provides a molded shell 3 to cover the multiple capacitor bodies 1 to protect the capacitor chip 11 from stress impact, and has extremely strong shock resistance and environmental adaptability; in addition, the structure of the welding jig 4 is specifically limited, and a positioning mechanism 46 is provided to position and fix the connecting frame 2 to ensure that multiple capacitor bodies 1 and the connecting frame 2 can be welded into shape at one time, and the welding quality is stable.

[0044] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of implementation of the present invention. In other words, equivalent changes and modifications made according to the scope of application of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A welding jig for pulse molded capacitors, characterized by: The pulse molded capacitor includes a plurality of capacitor bodies arranged at intervals, two connecting frames arranged on both sides of the plurality of capacitor bodies, and a plurality of molded shells respectively wrapped around the periphery of the plurality of capacitor bodies. The capacitor bodies include two capacitor chips arranged opposite to each other in an upper and lower direction. A connecting piece is formed on the inner side of the connecting frame and is opposite to the plurality of capacitor bodies. The connecting piece is arranged between the ends of the two capacitor chips. The welding jig includes an upper welding plate and a lower welding plate arranged opposite to each other, a lower mounting cavity formed in the lower welding plate for mounting the capacitor body, an upper mounting cavity arranged on the upper welding plate opposite to the lower mounting cavity, two mounting grooves respectively arranged on the top surface of the lower welding plate for mounting two connecting frames, and two positioning mechanisms respectively arranged on both sides of the capacitor body for fixing the two connecting frames.

2. The welding jig for pulse molded capacitors according to claim 1, characterized in that: The positioning mechanism comprises an upper positioning block and a lower positioning block which are arranged opposite to each other in the upper and lower directions, and a positioning member which is arranged between the upper positioning block and the lower positioning block. The connecting frame is fixed between the upper positioning block and the lower positioning block.

3. The welding jig for pulse molded capacitors according to claim 2, characterized in that: The lower end side surface of the upper positioning block is formed with an inwardly inclined upper inclined surface, and the upper end side surface of the lower positioning block is formed with an inwardly inclined lower inclined surface. The upper inclined surface and the lower inclined surface constitute a blocking groove opposite to the end of the capacitor body.

4. The welding jig for pulse molded capacitors according to claim 2, characterized in that: The positioning member includes two lower positioning holes arranged at both ends of the lower positioning block, two upper positioning holes arranged at both ends of the upper positioning block and opposite to the two lower positioning holes, two positioning magnets respectively arranged in the two lower positioning holes, and two positioning bolts respectively passing through the two upper positioning holes and cooperating with the relative positioning magnets.

5. The welding jig for pulse molded capacitors according to claim 4, characterized in that: The lower mounting cavity comprises a horizontal section for mounting the capacitor body and two vertical sections relatively arranged on both sides of the horizontal section. Both sides of the lower positioning block extend into the two vertical sections respectively.

6. The welding jig for pulse molded capacitors according to claim 5, characterized in that: The two positioning bolts are located in the vertical section, and the upper mounting cavity is formed with two clearance holes corresponding to the two vertical sections for the positioning bolts to pass through.

7. The welding jig for pulse molded capacitors according to claim 2, characterized in that: A plurality of upper heat dissipation holes are arranged at intervals on the upper positioning block, and a plurality of lower heat dissipation holes are arranged at intervals on the lower positioning block.

8. The welding jig for pulse molded capacitors according to claim 7, characterized in that: The bottom surface of the lower mounting cavity is formed with a plurality of lower positioning grooves extending downward for mounting capacitor chips, and the top surface of the upper mounting cavity is formed with a plurality of upper positioning grooves extending upward, and the plurality of lower positioning grooves correspond to the plurality of upper positioning grooves one by one.

9. The welding jig for pulse molded capacitors according to claim 8, characterized in that: The upper welding plate is provided with a plurality of upper heat conducting members opposite to the plurality of upper positioning grooves. The upper heat conducting members include two upper strip-shaped heat conducting holes arranged on both sides of the upper positioning grooves. The upper strip-shaped heat conducting holes are partially overlapped and connected with the upper heat dissipation holes.

10. The welding jig for pulse molded capacitors according to claim 1, characterized in that: It also includes a limiting member arranged between the upper welding plate and the lower welding plate, wherein the limiting member includes two limiting columns arranged on both sides of the lower welding plate and two limiting holes arranged on the upper welding plate for the two limiting columns to be embedded.

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