A tool for attaching thermal conductive double-sided adhesive to a planar transformer

Abstract

The present invention discloses a tool for attaching thermally conductive double-sided adhesive to a planar transformer, and relates to the technical field of auxiliary devices for attaching double-sided adhesive to a planar transformer. The present invention comprises a tool body, wherein the tool body is provided with a placement groove with openings at the upper end and one side wall, wherein the width of the placement groove is equal to the width of the magnetic core of the planar transformer, and a limiting surface is extended at the upper end of the placement groove, wherein a step surface is formed between the limiting surface and the placement groove, and the upper end of the limiting surface passes through the upper end of the tool body. When the double-sided adhesive is attached to the bottom surface of the magnetic core of the planar transformer, the four sides of the double-sided adhesive are all 0.4 to 0.6 mm longer than the four sides of the magnetic core; the tool body can meet the process production requirements during mass production of products and improve the bonding efficiency of the double-sided adhesive.

Description

Technical Field

[0001] The invention relates to the technical field of double-sided adhesive tape auxiliary devices for planar transformers, and in particular to a tooling for thermally conductive double-sided adhesive tape for planar transformers. Background Art

[0002] Planar transformers are standard gold brick and half-brick power modules in the communications industry. They have been developed for more than 20 years. The current 5G and various module power supplies of new energy vehicles continue to use this type of power module, and the market demand is large. Since the planar transformer design adopts an aluminum substrate structure, it is conducive to the heat dissipation and heat conduction of the entire power module. The heat generated when the transformer is working is transferred to the aluminum substrate, and then the aluminum substrate conducts the heat away; therefore, when designing a planar transformer, it is required to affix thermal conductive double-sided tape to the bottom of the magnetic core of the planar transformer. Due to the insulation performance and safety requirements, the length and width of the thermal conductive double-sided tape are usually 1mm larger than the length and width of the bottom of the magnetic core. When affixing the thermal conductive double-sided tape, the four sides of the thermal conductive double-sided tape need to evenly exceed the magnetic core by 0.4 to 0.6mm.

[0003] The traditional method of applying double-sided tape is to apply it manually. There is no way to ensure that the four sides of the thermal conductive double-sided tape are uniformly 0.4 to 0.6 mm longer than the four sides of the core, so the safety requirements cannot be fully guaranteed. In addition, when applying the thermal conductive double-sided tape manually, due to the obstruction of vision, it is often necessary to apply it repeatedly many times to barely stick it in the correct position, which has low production efficiency. If it is repeatedly torn off and re-applied, the viscosity of the double-sided tape will decrease, and there is a risk of the double-sided tape falling off, and the thermal conductive double-sided tape will not play a role in heat conduction. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a tooling for affixing thermally conductive double-sided tape to a planar transformer, which ensures that when the double-sided tape is affixed to the bottom surface of the magnetic core of the planar transformer, the four sides of the double-sided tape are 0.4 to 0.6 mm longer than the four sides of the magnetic core; it can meet the process production requirements during mass production, improve the efficiency of double-sided tape affixing, and reduce the difficulty and intensity of operation for operators.

[0005] The present invention specifically adopts the following technical solutions:

[0006] The tooling for attaching thermally conductive double-sided adhesive to a planar transformer of the present invention comprises a tooling main body, wherein the tooling main body is provided with a placement groove with openings at the upper end and one side wall, wherein the width of the placement groove is equal to the width of the magnetic core of the planar transformer, and a limiting surface is extended at the upper end of the placement groove, wherein a step surface is formed between the limiting surface and the placement groove, and the upper end of the limiting surface passes through the upper end of the tooling main body.

[0007] As a further preferred embodiment of the present invention: the tool body is provided with a clearance groove penetrating the placement groove, a side wall of the clearance groove penetrates the tool body, and the direction in which the clearance groove penetrates the tool body is consistent with the direction in which the placement groove penetrates the tool body.

[0008] As a further preferred embodiment of the present invention: the tooling body is provided with pin avoidance grooves respectively located on the left and right sides of the placement groove, and the pin avoidance grooves are communicated with the giving way grooves.

[0009] As a further preferred embodiment of the present invention, the limiting surface comprises a first limiting surface, a second limiting surface and a third limiting surface connected in sequence, and the distances between the first limiting surface, the second limiting surface and the third limiting surface and the inner wall of the placement groove are all 0.4-0.6 mm.

[0010] As a further preferred embodiment of the present invention: a first positioning groove is provided at the upper end of the tool body, a connection between the first limiting surface and the second limiting surface is a first right angle, and the first positioning groove passes through the first right angle.

[0011] As a further preferred embodiment of the present invention: a second positioning groove is provided at the upper end of the tool body, a connection between the third limiting surface and the second limiting surface is a second right angle, and the second positioning groove passes through the second right angle.

[0012] As a further preferred embodiment of the present invention: a tooling support plate is further provided at the lower end of the tooling body, at least one countersunk hole is penetrated through the tooling body along the thickness direction, a threaded hole coaxial with the countersunk hole is opened on the tooling support plate, and a tooling fixing screw is arranged in the countersunk hole.

[0013] The beneficial effects of the present invention are embodied in:

[0014] 1. The present invention sets a tooling body, and the tooling body is provided with a placement groove. The width of the placement groove is equal to the width of the magnetic core of the planar transformer, that is, when the magnetic core is placed in the placement groove, the outer wall of the magnetic core and the inner wall of the placement groove are pressed against each other. A limiting surface is expanded on the inner wall of the upper end of the placement groove, and the distance between the limiting surface and the inner wall of the placement groove is 0.4-0.6mm. When the thermal conductive double-sided adhesive is attached, the side wall of the thermal conductive double-sided adhesive and the inner wall of the limiting surface are adapted to each other, and the limiting surface plays a role of limiting and positioning the thermal conductive double-sided adhesive. The upper end of the limiting surface runs through the upper end of the tooling body, which is convenient for attaching the double-sided adhesive from the upper end. The limiting surface can realize quick attachment of the thermal conductive double-sided adhesive, without the need for manual attachment based on experience, and ensures that the four sides of the thermal conductive double-sided adhesive are 0.4-0.6mm longer than the four sides of the magnetic core. There is no need to tear it off and stick it again and again, which improves work efficiency and reduces the requirement for manual experience. It has good versatility and can be made by adjusting the corresponding size of the tooling for products of different sizes. It also effectively ensures that the safety distance requirements are met and improves the product qualification rate.

[0015] 2. The planar transformer includes a magnetic core and pins on the left and right sides of the magnetic core. The present invention sets a clearance groove on the tooling body, and the clearance groove penetrates the tooling body in the same direction as the placement groove penetrates the tooling body. That is, when the planar transformer is placed in the placement groove, it can be pushed in from one side of the tooling body, and the pins of the planar transformer enter the pin avoidance groove. The planar transformer is easy to put in and take out, which improves the bonding efficiency of the thermal conductive double-sided adhesive.

[0016] 3. The limiting surface includes a first limiting surface, a second limiting surface and a third limiting surface connected in sequence, and the four sides of the thermal conductive double-sided adhesive are limited by the three limiting surfaces. The first limiting surface, the second limiting surface and the third limiting surface are all 0.4 to 0.6 mm away from the inner wall of the placement groove, that is, when the thermal conductive double-sided adhesive is limited by the first limiting surface, the second limiting surface and the third limiting surface, the distance between the other side of the thermal conductive double-sided adhesive and the magnetic core is also 0.4 to 0.6 mm.

[0017] 4. By setting the first positioning groove and the second positioning groove, when the thermal conductive double-sided adhesive is installed, the two inner corners of the thermal conductive double-sided adhesive are located in the first positioning groove and the second positioning groove respectively, which plays a role in positioning and protecting the two inner corners of the thermal conductive double-sided adhesive, avoiding the first right angle or the second right angle from bending. When the thermal conductive double-sided adhesive needs to be torn off, it is convenient to apply force to tear it off.

[0018] 5. A tool support plate is set at the lower end of the tool body. When the planar transformer is installed in the placement slot, the levelness of the planar transformer is ensured to avoid unevenness of the workbench, which may cause deviation in the fitting of the thermal conductive double-sided adhesive. By setting the tool fixing screw, the integrity of the tool body and the tool support plate is ensured to avoid the tool support plate from moving randomly relative to the tool body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the tooling body;

[0021] Figure 2 for Figure 1 The schematic diagram of the top view structure shown;

[0022] Figure 3 It is an exploded schematic diagram of the tooling body and the planar transformer;

[0023] Figure 4 This is a three-dimensional assembly diagram when there is a thermally conductive double-sided adhesive tape;

[0024] Figure 5 for Figure 4 The schematic diagram of the top view structure shown;

[0025] Figure 6 This is a three-dimensional assembly diagram without thermal conductive double-sided tape;

[0026] Figure 7 for Figure 6 The schematic diagram of the top view structure shown;

[0027] In the accompanying drawings, 1-tooling body, 2-placing groove, 3-limiting surface, 301-first limiting surface, 302-second limiting surface, 303-third limiting surface, 4-allowing groove, 5-pin avoiding groove, 6-first positioning groove, 7-second positioning groove, 8-countersunk hole, 9-planar transformer, 901-magnetic core, 902-pin, 10-tooling support plate, 11-threaded hole, 12-thermal conductive double-sided tape, 13-tooling fixing screw. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0030] Example 1

[0031] The tooling for attaching thermally conductive double-sided adhesive to a planar transformer of the present invention comprises a tooling main body 1, wherein the tooling main body 1 is provided with a placement groove 2 with openings at the upper end and one side wall, wherein the width of the placement groove 2 is equal to the width of the magnetic core 901 of the planar transformer 9, and a limiting surface 3 is extended at the upper end of the placement groove 2, wherein a step surface is formed between the limiting surface 3 and the placement groove 2, and the upper end of the limiting surface 3 passes through the upper end of the tooling main body 1.

[0032] After adopting the above technical solution: the present invention sets a tooling body 1, and the tooling body 1 is provided with a placement slot 2, and the width of the placement slot 2 is equal to the width of the magnetic core 901 of the planar transformer 9, that is, when the magnetic core 901 is placed in the placement slot 2, the outer wall of the magnetic core 901 and the inner wall of the placement slot 2 are pressed against each other. A limiting surface 3 is expanded on the inner wall of the upper end of the placement slot 2, and the spacing between the limiting surface 3 and the inner wall of the placement slot 2 is 0.4-0.6mm. When the thermal conductive double-sided adhesive 12 is attached, the side wall of the thermal conductive double-sided adhesive 12 and the inner wall of the limiting surface 3 are adapted to each other, and the limiting surface 3 plays a role in limiting and positioning the thermal conductive double-sided adhesive 12. The upper end of the limiting surface 3 runs through the upper end of the tooling body 1, which is convenient for attaching the double-sided adhesive from the upper end. The limit surface 3 can be used to quickly fit the thermal conductive double-sided adhesive 12, without the need for manual fitting based on experience, to ensure that the four sides of the thermal conductive double-sided adhesive 12 are 0.4 to 0.6 mm longer than the four sides of the magnetic core 901. It is not necessary to tear it off and fit it again and again, which improves work efficiency and reduces manual experience requirements. It has good versatility, and products of different sizes can be made by adjusting the corresponding size of the tooling. It also effectively ensures that the safety distance requirements are met, and improves the product qualification rate.

[0033] Example 2

[0034] This embodiment is further optimized on the basis of the embodiment 1 as follows: the tool body 1 is provided with a clearance groove 4 penetrating the placement groove 2, one side wall of the clearance groove 4 penetrates the tool body 1, and the direction in which the clearance groove 4 penetrates the tool body 1 is consistent with the direction in which the placement groove 2 penetrates the tool body 1. The tool body 1 is provided with pin avoidance grooves 5 respectively located on the left and right sides of the placement groove 2, and the pin avoidance grooves 5 are connected with the clearance groove 4.

[0035] After adopting the above technical solution: the planar transformer 9 includes a magnetic core 901 and pins 902 located on the left and right sides of the magnetic core 901. The present invention sets a clearance groove 4 in the tooling body 1, and the clearance groove 4 penetrates the tooling body 1 in the same direction as the placement groove 2 penetrates the tooling body 1. That is, it is ensured that when the planar transformer 9 is placed in the placement groove 2, it can be pushed in from one side of the tooling body 1, and the pins 902 of the planar transformer 9 enter the pin avoidance groove 5. The placement and removal of the planar transformer 9 are convenient and quick, and the bonding efficiency of the thermal conductive double-sided adhesive 12 is improved.

[0036] Example 3

[0037] This embodiment is further optimized on the basis of Embodiment 1 as follows: the limiting surface 3 includes a first limiting surface 301, a second limiting surface 302 and a third limiting surface 303 connected in sequence, and the distances between the first limiting surface 301, the second limiting surface 302 and the third limiting surface 303 and the inner wall of the placement groove 2 are all 0.4 to 0.6 mm, for example 0.4 mm, 0.5 mm and 0.6 mm.

[0038] After adopting the above technical solution: the limiting surface 3 includes a first limiting surface 301, a second limiting surface 302 and a third limiting surface 303 connected in sequence, and the four sides of the thermal conductive double-sided adhesive 12 are limited by the three limiting surfaces 3. The first limiting surface 301, the second limiting surface 302 and the third limiting surface 303 are all 0.4 to 0.6 mm away from the inner wall of the placement groove 2, that is, when the thermal conductive double-sided adhesive 12 is limited by the first limiting surface 301, the second limiting surface 302 and the third limiting surface 303, the distance between the other side of the thermal conductive double-sided adhesive 12 and the magnetic core 901 is also 0.4 to 0.6 mm.

[0039] Example 4

[0040] This embodiment is further optimized on the basis of the embodiment 1 as follows: a first positioning groove 6 is provided at the upper end of the tool body 1, the connection between the first limiting surface 301 and the second limiting surface 302 is a first right angle, and the first positioning groove 6 runs through the first right angle. A second positioning groove 7 is provided at the upper end of the tool body 1, the connection between the third limiting surface 303 and the second limiting surface 302 is a second right angle, and the second positioning groove 7 runs through the second right angle.

[0041] After adopting the above technical solution: by setting the first positioning groove 6 and the second positioning groove 7, when the thermal conductive double-sided adhesive tape 12 is fitted and installed, the two inner corners of the thermal conductive double-sided adhesive tape 12 are respectively located in the first positioning groove 6 and the second positioning groove 7, which play a role in positioning and protecting the two inner corners of the thermal conductive double-sided adhesive tape 12, avoiding the first right angle or the second right angle from being bent. When the thermal conductive double-sided adhesive tape 12 needs to be torn off, it is convenient to apply force to tear it off.

[0042] Example 5

[0043] This embodiment is further optimized on the basis of Embodiment 1 as follows: a tooling support plate 10 is further provided at the lower end of the tooling main body 1, at least one countersunk hole 8 is penetrated through the tooling main body 1 along the thickness direction, a threaded hole 11 coaxial with the countersunk hole 8 is opened on the tooling support plate 10, and a tooling fixing screw 13 is arranged in the countersunk hole 8.

[0044] After adopting the above technical solution: a tool support plate 10 is arranged at the lower end of the tool body 1. When the planar transformer 9 is installed in the placement groove 2, the horizontality of the planar transformer 9 is ensured to avoid unevenness of the workbench, which may cause deviation in the fitting of the thermal conductive double-sided adhesive 12. By arranging a tool fixing screw 13, the integrity of the tool body 1 and the tool support plate 10 is ensured, and the tool support plate 10 is prevented from moving randomly relative to the tool body 1.

[0045] Example 6

[0046] When attaching the thermally conductive double-sided adhesive 12: first place the tooling body 1 on the table and fix it, then use your hand to hold the semi-finished transformer and push it into the placement slot 2 of the tooling body 1, so that the planar transformer 9 and the tooling body 1 maintain a fixed relative position; then tear off the protective film on one side of the thermally conductive double-sided adhesive 12, hold the thermally conductive double-sided adhesive 12 with your hand, with the adhesive side facing down, and stick the thermally conductive double-sided adhesive 12 to the bottom surface of the magnetic core 901 through the limiting surface 3 at the upper end of the placement slot 2, press it with your hand to make it stick to the magnetic core 901, and finally take out the transformer together with the thermally conductive double-sided adhesive 12 by hand to complete the pasting process of the thermally conductive double-sided adhesive 12.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A tool for attaching thermally conductive double-sided adhesive to a planar transformer, characterized in that: The tooling body comprises a placement groove with an upper end and a side wall opening, the width of the placement groove is equal to the width of the magnetic core of the planar transformer, a limiting surface is extended at the upper end of the placement groove, a step surface is formed between the limiting surface and the placement groove, and the upper end of the limiting surface passes through the upper end of the tooling body; The limiting surface comprises a first limiting surface, a second limiting surface and a third limiting surface connected in sequence, and the distances between the first limiting surface, the second limiting surface and the third limiting surface and the inner wall of the placement groove are all 0.4 to 0.6 mm; A first positioning groove is provided at the upper end of the tool body, the connection between the first limiting surface and the second limiting surface is a first right angle, and the first positioning groove passes through the first right angle; A second positioning groove is provided at the upper end of the tool body, the connection between the third limiting surface and the second limiting surface is a second right angle, and the second positioning groove passes through the second right angle; The tooling body is provided with a clearance groove penetrating the placement groove, a side wall of the clearance groove penetrates the tooling body, and the direction in which the clearance groove penetrates the tooling body is consistent with the direction in which the placement groove penetrates the tooling body; The tooling body is provided with pin avoidance grooves respectively located on the left and right sides of the placement groove, and the pin avoidance grooves are communicated with the giving way groove.

2. The tooling for attaching thermally conductive double-sided adhesive tape to a planar transformer according to claim 1, characterized in that: A tool support plate is also provided at the lower end of the tool body. The tool body is penetrated with at least one countersunk hole along the thickness direction. The tool support plate is provided with a threaded hole coaxial with the countersunk hole. A tool fixing screw is arranged in the countersunk hole.

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