IGBT (Insulated Gate Bipolar Translator) single tube positioning jig and IGBT module reflow soldering tool

Abstract

The utility model provides an IGBT single tube positioning jig and an IGBT module reflow soldering tool, the IGBT single tube positioning jig comprises a jig plate, the upper surface of the jig plate is provided with a plurality of positioning grooves, the positioning grooves comprise a main positioning groove hole and a plurality of auxiliary positioning groove holes which are arranged in one-to-one correspondence with pins, and the main positioning groove hole and the auxiliary positioning groove holes are communicated with each other. The main positioning groove hole comprises a groove part I of which the shape is matched with the shape of the IGBT single tube main body; the auxiliary positioning groove hole comprises a groove part II communicated with the groove part I and a hole part II formed in the groove part II, so that the IGBT single tube with a bent pin can be positioned; the IGBT module reflow soldering tool comprises the IGBT single tube positioning jig and the positioning steel mesh detachably and fixedly arranged above the IGBT single tube positioning jig, when the IGBT module reflow soldering tool is used for the reflow soldering technology, simultaneous soldering of a plurality of IGBT modules can be achieved, and the working efficiency of the reflow soldering technology is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to IGBT module production technical field especially, relates to a kind of IGBT single tube positioning jig and IGBT module reflow soldering tool. BACKGROUND

[0002] In order to be applicable to the application scene of high voltage, large current processing capacity in new energy vehicles, a kind of IGBT module with simple structure appears on the market currently, its structure is shown as convex 1, the IGBT module is formed by IGBT single tube and ceramic copper-clad plate (DBC) welded on the surface of IGBT single tube, and the pin of IGBT single tube is usually processed by bending 90 °, and the volume and weight of this IGBT module are smaller, suitable for the application scene of limited space.

[0003] IGBT module is generally produced by reflow soldering process, before entering reflow furnace, ceramic copper-clad plate (DBC) needs to be attached on the surface of IGBT single tube, at this time, special fixture is needed to position IGBT single tube and ceramic copper-clad plate (DBC), and there is lack of positioning jig specially used for IGBT single tube with bent pin in prior art. UTILITY MODEL CONTENT

[0004] Based on the problems existing in the prior art, the utility model aims at solving the technical problem that there is lack of positioning jig specially used for IGBT single tube with bent pin in prior art.

[0005] The utility model provides a kind of IGBT single tube positioning jig, the IGBT single tube includes IGBT single tube main body and the several pins of fixed in the end of IGBT single tube main body, the pin is bent towards the side away from the surface where the pad of IGBT single tube main body is located;The IGBT single tube positioning jig includes jig plate, and the upper surface of jig plate is provided with multiple positioning grooves, and the positioning groove includes:

[0006] Main positioning slot hole, including the slot part one that shape is matched with the appearance of IGBT single tube main body;

[0007] Several vice positioning slot holes corresponding to the pin one by one are set, and the vice positioning slot hole includes the slot part two communicated with the slot part one and the hole part two opened in the slot part two.

[0008] According to the utility model one embodiment, the main positioning slot hole further includes the hole part opened in the slot part one.

[0009] According to the utility model one embodiment, the tool plate upper surface still is provided with multiple corresponding with the positioning recess groove counterflow groove hole, the counterflow groove hole includes groove three and the hole three in groove three, groove three is located corresponding the main positioning slot hole outside of the positioning recess groove and is communicated with groove one.

[0010] According to the utility model one embodiment, at least two positioning recess grooves share one counterflow groove hole.

[0011] According to the utility model one embodiment, multiple positioning recess grooves are evenly divided into multiple groups, and multiple positioning recess grooves are arrayed on the tool plate, each group has two columns of positioning recess grooves, and the auxiliary positioning slot holes of the two columns of positioning recess grooves are arranged away from each other, and each column has multiple positioning recess grooves distributed in a straight line.

[0012] A column of counterflow groove holes is arranged between the two columns of positioning recess grooves in each group, and the groove three of each counterflow groove hole is communicated with the groove one of the corresponding positioning recess groove in the two columns.

[0013] According to the utility model one embodiment, the bottom of the tool plate is provided with multiple sunken grooves, and the multiple sunken grooves are one-to-one corresponding to the multiple groups of positioning recess grooves.

[0014] According to the utility model one embodiment, the width of groove two is matched with the outer diameter of the pin, and the inner diameter of hole two is matched with the outer diameter of the pin.

[0015] According to the utility model one embodiment, multiple hand grip holes / slots are symmetrically provided on the tool plate.

[0016] The utility model also provides a kind of IGBT module reflow soldering tool, and the IGBT module includes IGBT single tube and ceramic copper-clad plate welded on the surface of IGBT single tube;It includes:

[0017] The IGBT single tube positioning jig;

[0018] Positioning steel net, detachably fixed on the upper surface of the IGBT single tube positioning jig, multiple limiting holes corresponding one by one with the main positioning slot hole are provided on the positioning steel net, and the shape of the limiting hole is matched with the shape of the ceramic copper-clad plate.

[0019] According to the utility model one embodiment, multiple positioning recess grooves and multiple limiting holes are arrayed on the tool plate and the positioning steel net respectively, multiple positioning recess grooves in each column are distributed in a straight line at intervals, and the spacing between adjacent two positioning recess grooves in each column is not less than the width of the ceramic copper-clad plate.

[0020] The utility model has the advantages that:

[0021] (1) The IGBT single tube positioning jig provided by the utility model, the pin of the IGBT single tube can pass through the corresponding hole part two after being bent, and the part of the pin that is not bent can fall into the groove part two, meanwhile, the IGBT single tube body can fall into the groove part one, so that the IGBT single tube with the bent pin can be positioned;

[0022] (2) The IGBT module reflow soldering tool provided by the utility model, the IGBT single tube positioning jig and the positioning steel net can realize the positioning of multiple IGBT single tubes and multiple ceramic copper-clad plates respectively, so that when the IGBT module reflow soldering tool is used for reflow soldering process, the simultaneous soldering of multiple IGBT modules can be realized, and the working efficiency of the reflow soldering process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0024] Figure 1 It is a structure schematic view of the IGBT module in the prior art;

[0025] Figure 2 It is a structure schematic view of the IGBT single tube positioning jig provided by the utility model embodiment;

[0026] Figure 3 It is a structure schematic view of the IGBT single tube positioning jig provided by the utility model embodiment; Figure 2 It is a partial A enlarged schematic view in the utility model;

[0027] Figure 4 It is a structure schematic view of another view of the IGBT single tube positioning jig provided by the utility model embodiment;

[0028] Figure 5 It is a structure schematic view of the positioning steel net in the utility model embodiment;

[0029] 1000-IGBT module; 100-IGBT single tube; 100-1-IGBT single tube body; 100-2-pin; 200-ceramic copper clad plate; 1-IGBT single tube positioning jig; 10-jig plate; 11-positioning groove; 111-main positioning slot hole; 1111-groove part one; 1112-hole part one; 112-secondary positioning slot hole; 1121-groove part two; 1122-hole part two; 12-convection slot hole; 121-groove part three; 122-hole part three; 13-sink groove; 14-hand hole / slot; 15-first positioning hole; 2-positioning steel mesh; 21-strip limiting hole; 22-second positioning hole. DETAILED DESCRIPTION

[0030] The description of the following embodiments is with reference to the additional drawings to illustrate specific embodiments that the utility model can be used to implement.

[0031] The utility model provides a kind of IGBT single tube positioning jig, such as Figure 1 It is the structural schematic diagram of prior art IGBT module 1000, the IGBT module 1000 includes the IGBT single tube 100 and the ceramic copper clad plate 200 welded on the surface of the IGBT single tube 100;Wherein, the IGBT single tube 100 includes IGBT single tube body 100-1 and the several pins 100-2 fixed at the end of the IGBT single tube body 100-1, the pin 100-2 is bent 90 ° towards the side away from the pad on the surface of the IGBT single tube body 100-1;

[0032] The structure of the IGBT single tube positioning jig 1 is as shown in Figure 2 It includes jig plate 10, and the upper surface of the jig plate 10 is provided with a plurality of positioning grooves 11, as shown in Figure 3 It is the enlarged schematic diagram of local part A in Figure 2 The positioning groove 11 includes main positioning slot hole 111 and a plurality of secondary positioning slot holes 112 corresponding to the pin 100-2, wherein the main positioning slot hole 111 includes groove part one 1111 matched with the shape of the IGBT single tube body 100-1;The secondary positioning slot hole 112 includes groove part two 1121 communicated with the groove part one 1111 and hole part two 1122 provided in the groove part two 1121;Preferably, the width of the groove part two 1121 is matched with the outer diameter of the pin 100-2, the inner diameter of the hole part two 1122 is matched with the outer diameter of the pin 100-2, and the groove part two 1121 and the hole part two 1122 can limit the pin 100-2 together.

[0033] Through the above design, the bent portion of the pin 100-2 of the IGBT single tube 100 can pass through the corresponding hole 1122, while the unbent portion of the pin 100-2 can fall into the groove 1121. At the same time, the IGBT single tube body 100-1 can fall into the groove 1111, thereby enabling the positioning of the IGBT single tube 100 with the bent pin 100-2.

[0034] According to one embodiment of the present invention, the main positioning slot 111 further includes a hole 1112 formed in the slot 1111.

[0035] It is understood that the hole 1112 can support the IGBT single tube body 100-1 to be partially exposed to the outside, thereby increasing the heating or cooling rate of the IGBT single tube 100 when it is heated or cooled in the reflow oven.

[0036] Furthermore, the upper surface of the fixture plate 10 is also provided with a plurality of convection slot holes 12 corresponding to the positioning groove 11. The convection slot hole 12 includes a slot portion 121 and a hole portion 122 opened in the slot portion 121. The slot portion 121 is located outside the main positioning slot hole 111 of the corresponding positioning groove 11 and communicates with its slot portion 1111.

[0037] It is understood that when the IGBT single tube positioning fixture 1 containing the IGBT module 1000 is sent into the reflow oven for heating, the hot air in the reflow oven can pass through the third hole 122 and flow through the third groove 121 to the first groove 1111 to transfer heat to the IGBT single tube body 100-1 located in the first groove 1111, thereby improving the heating efficiency of the IGBT single tube body 100-1; correspondingly, when the IGBT single tube positioning fixture 1 containing the IGBT module 1000 is cooled, the cold air from the outside can pass through the third hole 122 and flow through the third groove 121 to the first groove 1111 to cool the IGBT single tube body 100-1 in the first groove 1111, thereby improving the cooling efficiency of the IGBT single tube body 100-1.

[0038] In order to improve the utilization rate of the fixture plate 10 and reduce the size of the fixture plate 10, in this embodiment of the present invention, at least two of the positioning grooves 11 share one convection slot hole 12.

[0039] Specifically, the multiple positioning grooves 11 are evenly divided into multiple groups, and the multiple groups of positioning grooves 11 are arrayed on the fixture plate 10. Each group has two columns of positioning grooves 11, and the secondary positioning slots 112 of the two columns of positioning grooves 11 are set far apart from each other. Each column has multiple positioning grooves 11 distributed along a straight line.

[0040] A column of convection slots 12 is provided between the two columns of positioning grooves 11 in each group, and the slot portion 121 of each convection slot 12 is connected to the slot portion 1111 of the corresponding positioning groove 11 in the two columns.

[0041] It is easy to understand that, through the above design, the positioning grooves 11 located on the left and right sides of the convection slot hole 12 can share the same convection slot hole 12, thereby improving the utilization rate of the fixture plate 10.

[0042] It should be noted that the two positioning grooves 11 sharing the same convection slot hole 12 is only a preferred embodiment of this utility model. In other embodiments, by adjusting the relative positional relationship between the positioning grooves 11 and the convection slot hole 12, more positioning grooves 11 can share the same convection slot hole 12, thereby making the fixture plate 10 have a higher utilization rate. For example, multiple positioning grooves 11 in each group are circumferentially distributed, and a convection slot hole 12 is set at the center of the multiple circumferentially distributed positioning grooves 11.

[0043] like Figure 4 The diagram shown is a structural schematic diagram of the IGBT single tube positioning fixture 1 from another perspective. Furthermore, the bottom of the fixture plate 10 is provided with multiple recesses 13, and the multiple recesses 13 are respectively arranged in a one-to-one correspondence with multiple sets of positioning grooves 11.

[0044] It is easy to understand that by opening the groove 13 at the bottom of the fixture plate 10, the volume of the IGBT single tube positioning fixture 1 can be reduced, so that the IGBT single tube positioning fixture 1 can reach the preset temperature more quickly when heating or cooling.

[0045] Furthermore, the fixture plate 10 is symmetrically provided with multiple hand gripping holes / grooves 14, which facilitates gripping when transporting the IGBT single tube positioning fixture 1.

[0046] The utility model discloses still provide a kind of IGBT module reflow soldering tool, the IGBT module 1000 including IGBT single tube 100 and welding in the surface of the IGBT single tube 100 ceramic copper-clad plate 200, the width of the ceramic copper-clad plate 200 is greater than the width of the IGBT single tube 100;It includes the IGBT single tube positioning jig 1 and positioning steel net 2 of the described, wherein, the positioning steel net 2 detachably fixed on the upper surface of the IGBT single tube positioning jig 1, a plurality of limit holes corresponding one-to-one with the main positioning slot hole 111 are opened in the positioning steel net 2, the shape of the limit hole is matched with the outline of the ceramic copper-clad plate 200, and the structural diagram of the positioning steel net 2 is as shown in Figure 5

[0047] The positioning steel net 2 is fixed above the IGBT single tube positioning jig 1 loaded with IGBT single tube 100 (the positioning steel net 2 will cover on the upper end surface of the slot part three 121 and the hole part three 122), then the ceramic copper-clad plate 200 is placed into the limit hole of the positioning steel net 2, the position of the ceramic copper-clad plate 200 and the IGBT single tube 100 can be one-to-one corresponding, finally, the IGBT module reflow soldering tool is sent into reflow furnace, and the simultaneous welding of multiple IGBT modules 1000 can be realized, and the soldering efficiency is higher.

[0048] Specifically, in the IGBT module reflow soldering tool, multiple positioning grooves 11 and multiple limit holes are respectively arrayed on the jig plate 10 and the positioning steel net 2, multiple positioning grooves 11 in each column are distributed along a straight line at intervals, and the spacing of two adjacent positioning grooves 11 in each column is not less than the width of the ceramic copper-clad plate 200.

[0049] Preferably, the spacing of two adjacent positioning grooves 11 in each column is equal to the width of the ceramic copper-clad plate 200, so that multiple limit holes in the same column are communicated to form a strip-shaped limit hole 21, the utilization rate of the positioning steel net 2 can be improved, and thus the size of the positioning steel net 2 can be reduced.

[0050] Further, in order to detachably fix the positioning steel net 2 on the upper surface of the IGBT single tube positioning jig 1, a plurality of first positioning holes 15 are also opened on the jig plate 10, and a plurality of second positioning holes 22 corresponding to the first positioning holes 15 are opened on the positioning steel net 2.

[0051] After positioning pins (not shown in the figure) are loaded in the plurality of first positioning holes 15, the corresponding second positioning holes 22 on the positioning steel net 2 can be sleeved on the outer surface of the positioning pins, that is, the positioning steel net 2 can be fixed on the IGBT single tube positioning jig 1.​

[0052] In order to facilitate the understanding of the scheme, the following is combined with Figures 1-5 The working principle of the utility model is described in detail:

[0053] Step 1, the IGBT single tube 100 is placed in the plurality of positioning grooves 11 of the IGBT single tube positioning jig 1, when the IGBT single tube 100 is placed in the positioning groove 11, the part after the pin 100-2 is bent passes through the corresponding hole part two 1122, and the part of the pin 100-2 that is not bent falls into the groove part two 1121, at the same time, the IGBT single tube body 100-1 falls into the groove part one 1111, so that the IGBT single tube 100 with the bent pin 100-2 can be positioned.

[0054] Step 2, tin paste is brushed on the upper surface of the IGBT single tube body 100-1 (the upper surface has a solder pad).

[0055] Step 3, the positioning pin is loaded in the plurality of first positioning holes 15 of the IGBT single tube positioning jig 1, and attention is paid to the fact that the top end of the positioning pin protrudes from the upper surface of the IGBT single tube positioning jig 1.

[0056] Step 4, the positioning steel mesh 2 is placed above the IGBT single tube positioning jig 1, the positioning steel mesh 2 is adjusted to be parallel to the IGBT single tube positioning jig 1, then the positioning steel mesh 2 is moved downward, so that the top end of the plurality of positioning pins passes through the corresponding second positioning hole 22, the positioning steel mesh 2 is loosened, so that the positioning steel mesh 2 falls on the upper surface of the IGBT single tube positioning jig 1, at this time, the limiting hole on the positioning steel mesh 2 is located directly above the main positioning slot hole 111.

[0057] Step 5, the ceramic copper-clad plate 200 is placed in the strip-shaped limiting hole 21 until each IGBT single tube 100 has a ceramic copper-clad plate 200 placed directly above.

[0058] Step 6, sent into the reflow furnace for welding.

[0059] As described above, in the IGBT single tube positioning jig and the IGBT module reflow soldering tool, the IGBT single tube positioning jig 1 and the positioning steel mesh 2 can realize the positioning of a plurality of IGBT single tubes 100 and a plurality of ceramic copper-clad plates 200 at the same time, so that the IGBT module reflow soldering tool can realize the simultaneous welding of a plurality of IGBT modules 1000 when used for reflow soldering process, and the working efficiency of the reflow soldering process is improved.

[0060] It needs to be explained that although the utility model discloses the above with specific embodiment, the above embodiment is not used to limit the utility model, and the ordinary skilled person in the art can make various changes and refinements without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model is defined with the claim range.

Claims

1. An IGBT single tube positioning jig, the IGBT single tube (100) comprising an IGBT single tube body (100-1) and a plurality of pins (100-2) fixed at the end of the IGBT single tube body (100-1), the pins (100-2) being bent towards the side away from the surface where the pads of the IGBT single tube body (100-1) are located; characterized in that, The IGBT single tube positioning jig comprises a jig plate (10), a plurality of positioning grooves (11) are formed on the upper surface of the jig plate (10), and the positioning grooves (11) comprise: A main positioning slot hole (111) comprising a groove part one (1111) matched with the shape of the IGBT single tube body (100-1); A plurality of auxiliary positioning slot holes (112) corresponding to the pins (100-2), the auxiliary positioning slot holes (112) comprise a groove part two (1121) communicated with the groove part one (1111) and a hole part two (1122) formed in the groove part two (1121).

2. The IGBT single tube positioning jig according to claim 1, characterized by, The main positioning slot hole (111) further comprises a hole part one (1112) formed in the groove part one (1111).

3. The IGBT single tube positioning jig according to claim 2, characterized by, The upper surface of the jig plate (10) further comprises a plurality of counterflow slot holes (12) corresponding to the positioning grooves (11), the counterflow slot holes (12) comprise a groove part three (121) and a hole part three (122) formed in the groove part three (121), and the groove part three (121) is located outside the main positioning slot hole (111) corresponding to the positioning groove (11) and is communicated with the groove part one (1111).

4. The IGBT single tube positioning jig according to claim 3, characterized by, At least two positioning grooves (11) share one counterflow slot hole (12).

5. The IGBT single tube positioning jig according to claim 4, characterized in that, A plurality of positioning grooves (11) are evenly divided into a plurality of groups, and a plurality of positioning grooves (11) are arrayed on the jig plate (10), each group has two rows of positioning grooves (11), the auxiliary positioning slot holes (112) of the two rows of positioning grooves (11) are arranged away from each other, and each row has a plurality of positioning grooves (11) arranged in a straight line; A column of counterflow slot holes (12) is arranged between the two rows of positioning grooves (11) in each group, and the groove part three (121) of each counterflow slot hole (12) is respectively communicated with the groove part one (1111) of the corresponding positioning groove (11) in the two rows.

6. The IGBT single tube positioning jig according to claim 5, characterized by, A plurality of sink grooves (13) are formed in the bottom of the jig plate (10), and a plurality of sink grooves (13) are respectively arranged one-to-one corresponding to a plurality of groups of positioning grooves (11).

7. The IGBT single tube positioning jig according to claim 1, characterized by, The width of the groove part two (1121) is matched with the outer diameter of the pin (100-2), and the inner diameter of the hole part two (1122) is matched with the outer diameter of the pin (100-2).

8. The IGBT single tube positioning jig according to claim 1, characterized by, A plurality of hand grip holes / slots (14) are symmetrically formed on the jig plate (10).

9. An IGBT module reflow soldering tool, the IGBT module (1000) comprising an IGBT single tube (100) and a ceramic copper-clad plate (200) welded on the surface of the IGBT single tube (100); characterized in that, It comprises: The IGBT single tube positioning jig (1) according to any one of claims 1-8; A positioning steel mesh (2) is detachably fixed on the upper surface of the IGBT single tube positioning jig (1), and a plurality of limiting holes corresponding one-to-one to the main positioning slot hole (111) are formed on the positioning steel mesh (2), and the shape of the limiting hole is matched with the shape of the ceramic copper-clad plate (200).

10. The IGBT module reflow soldering tool of claim 9, wherein, A plurality of positioning grooves (11) and a plurality of limiting holes are respectively arrayed on the jig plate (10) and the positioning steel mesh (2), the plurality of positioning grooves (11) in each column are distributed along a straight line at intervals, and the spacing between the two adjacent positioning grooves (11) in each column is not less than the width of the ceramic copper-clad plate (200).

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