CN219852537U - Pin needle welding jig - Google Patents
Pin needle welding jig Download PDFInfo
- Publication number
- CN219852537U CN219852537U CN202321285254.3U CN202321285254U CN219852537U CN 219852537 U CN219852537 U CN 219852537U CN 202321285254 U CN202321285254 U CN 202321285254U CN 219852537 U CN219852537 U CN 219852537U
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- cover plate
- positioning
- pin needle
- holes
- positioning hole
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- 238000003466 welding Methods 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Connection Of Plates (AREA)
Abstract
The utility model relates to a Pin welding jig, which comprises: the device comprises a cover plate, a top plate, a positioning bolt and a bottom plate; the cover plate is provided with a plurality of first positioning holes and a plurality of fixing holes, and the diameter of each fixing hole is smaller than that of the Pin needle; the top plate is provided with a plurality of second positioning holes concentric with the first positioning holes of the cover plate and a plurality of through holes concentric with the fixed holes, and the diameter of each through hole is larger than that of the Pin needle; the bottom plate is provided with a containing groove and a third positioning hole, the third positioning hole is arranged outside the containing groove, and the third positioning hole and the second positioning hole are concentric; one end of the positioning bolt penetrates through the second positioning hole of the top plate to be connected with the first positioning hole of the cover plate, and the other end of the positioning bolt is connected with the third positioning hole of the bottom plate. The Pin needle welding jig has the advantages of avoiding the risk of Pin needle falling in the assembly process, improving the welding efficiency and improving the welding precision.
Description
Technical Field
The utility model relates to the field of module packaging, in particular to the field of Pin welding jigs of IGBT modules.
Background
The IGBT (insulated gate bipolar transistor) T is a device formed by conforming a MOSFET and a bipolar transistor, combines the advantages of the MOSFET device and the bipolar transistor, has the advantages of small driving power and high switching speed of the MOSFET device, has the advantages of reduced saturation voltage and large capacity of the bipolar device, has the frequency characteristic between the MOSFET and the power transistor, can normally work in a frequency range of tens of KHZ, and is widely applied to the industries of modern industrial electronic technologies, such as frequency converters, air conditioners, welding machines, photovoltaics, automobiles and the like.
Referring to fig. 1 and 2, the pin needles of the conventional pin type IGBT module need to be soldered on a DBC (copper clad ceramic substrate) by reflow sintering, so a jig is required to fix the pin needles on the DBC in a predetermined arrangement, and the pin needles 15 are first inserted into the original top plate 2.1 in a fixed arrangement; the DBC14 is then placed on the original base plate 4.1; and finally, reversely buckling the original bottom plate 4.1 and the DBC together, assembling the Pin needle and the original top plate 2.1 together, and turning over the assembly again after the assembly is completed, wherein the Pin needle is contacted with the welding point of the DBC. A combination as shown in fig. 2 is formed. In the back-buckling process of the original bottom plate and the DBC, the risk that the DBC falls exists, and only a group of pin needles and 1 DBC can be assembled in each operation, and the fixture can only be assembled in a flip-chip mode, so that the falling risk exists, and meanwhile, the working efficiency is greatly reduced.
Disclosure of Invention
Therefore, the utility model aims to provide a Pin needle welding jig, which can be used for reversely arranging the cover plate and the top plate after being combined in a mode that a plurality of fixing holes which are directly slightly smaller than the diameter of the Pin needle are formed in the cover plate by adding the cover plate on the existing device, and the Pin needles are inserted into through holes of the top plate one by one and then fixed in the fixing holes, so that the risk of Pin needle falling in the assembly process is avoided, and the production efficiency and the welding precision are improved.
The utility model is realized by the following technical scheme:
pin needle welding jig includes: the device comprises a cover plate, a top plate, a positioning bolt and a bottom plate;
the cover plate is provided with a plurality of first positioning holes and a plurality of fixing holes, and the diameter of each fixing hole is smaller than that of the Pin needle;
the top plate is provided with a plurality of second positioning holes concentric with the first positioning holes of the cover plate and a plurality of through holes concentric with the fixed holes, and the diameter of each through hole is larger than that of the Pin needle;
the bottom plate is provided with a containing groove and a third positioning hole, the third positioning hole is arranged outside the containing groove, and the third positioning hole and the second positioning hole are concentric;
one end of the positioning bolt penetrates through the second positioning hole of the top plate to be connected with the first positioning hole of the cover plate, and the other end of the positioning bolt is connected with the third positioning hole of the bottom plate.
Further, two cover plate fetching grooves are correspondingly arranged on one group of opposite edges of the cover plate. The cover plate taking groove is formed in the mode that after the cover plate is combined with the top plate, two sides of the top plate can be exposed through the cover plate taking groove, and when the cover plate needs to be overturned, a user can conveniently take and put the cover plate and the top plate together.
Further, the tail end of one end of the positioning bolt presents a cylinder with a convex middle part, the diameter of the largest part is larger than that of the second positioning hole, and the diameter of the second positioning hole is slightly larger than that of the first positioning hole.
Further, two sides of the accommodating groove are provided with a piece taking groove, and the depth of the piece taking groove is deeper than that of the accommodating groove. The accommodating groove is used for accommodating the DBC, and after the Pin needle is welded, a user can take the DBC out of the accommodating groove by grabbing two sides of the DBC through the accommodating groove.
Further, the cover plate and the top plate are provided with observation openings opposite to the accommodating grooves. Whether the top of the Pin needle is in good contact with the DBC or not can be directly observed in the assembly process through the observation port, and the assembly condition can be conveniently observed.
Further, a plurality of accommodating grooves are formed in the bottom plate, and each accommodating groove is provided with a corresponding picking groove. In the utility model, the plurality of accommodating grooves are arranged, the Pin needles can be welded on a plurality of DBCs at one time, and the problem of reduced assembly precision of the excessive Pin needles is avoided due to the existence of the cover plate.
Further, the plurality of first positioning holes are respectively arranged at four inner vertex angles of the cover plate.
The positioning bolts can not block a user when the Pin needle is inclined in assembly, and the user can correct the position of the Pin needle more simply.
Further, the hardness of the material of the cover plate is smaller than that of the material of the Pin needle.
Ensuring that the tail end of the Pin needle is not damaged due to extrusion when the Pin is fixed in the fixing hole,
According to the Pin needle welding jig provided by the utility model, the cover plate is added on the existing device, and the plurality of fixing holes which are directly slightly smaller than the Pin needle diameter are formed in the cover plate, so that the cover plate and the top plate can be combined and inverted, the Pin needles are inserted into the through holes of the top plate one by one and then fixed in the fixing holes, the risk of Pin needle falling in the assembly process is avoided, the part of the Pin needle remained in the fixing holes and the through holes is lengthened due to the combination of the cover plate and the top plate, the phenomenon of bending and breaking caused by too short Pin needle in the fixing holes is prevented, multiple groups of DBCs can be welded at one time, and the production efficiency and the welding precision are greatly improved.
For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.
Drawings
FIG. 1 is an assembly schematic diagram of a conventional welding jig;
FIG. 2 is a schematic diagram of a conventional assembly flipped by a soldering fixture;
FIG. 3 is a schematic diagram of the overall structure of a Pin welding jig provided by the utility model;
FIG. 4 is a schematic diagram of a cover plate of a Pin welding jig according to the present utility model;
FIG. 5 is a schematic diagram of the top plate of the Pin welding jig according to the present utility model;
fig. 6 is a schematic structural diagram of a bottom plate of a Pin needle welding jig provided by the utility model.
Fig. 7 is a schematic structural diagram of an improved positioning pin according to the present utility model.
Reference numerals:
1: a cover plate; 10: a fixing hole; 11: a cover plate taking groove; 12: observation port: 13: a first positioning hole; 14: DBC;15: pin needles; 2: a top plate; 2.1: an original top plate; 21: a through hole; 22: a second positioning hole; 3: a positioning bolt; 4: a bottom plate; 4.1: a base plate; 5: a receiving groove; 6: third positioning hole: 7: and a piece taking groove.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Referring to fig. 3-6, the Pin needle welding jig provided by the utility model can be inverted after the cover plate and the top plate are combined by adding a cover plate on the existing device and arranging a plurality of fixing holes with diameters slightly smaller than those of the Pin needles on the cover plate, and the Pin needles are inserted into the through holes of the top plate one by one and then fixed in the fixing holes, so that the risk of dropping the Pin needles in the assembly process is avoided. Pin needle welding jig includes: a cover plate 1, a top plate 2, a positioning bolt 3 and a bottom plate 4.
Referring to fig. 4, in the present utility model, the cover plate is square, the cover plate 1 is provided with a plurality of fixing holes 10 and four first positioning holes 13, and the first positioning holes 13 are respectively disposed at four inner top corners of the cover plate 1. The diameter of the fixing hole is slightly smaller than that of the Pin needle, the diameter of the fixing hole 10 is 0.95mm, and the diameter of the Pin needle 15 is 1mm in the present utility model, so that one end of the Pin needle 15, which is in contact with the fixing hole 10, is fixed on the cover plate 1 after the Pin needle is inserted on the cover plate 1. In addition, the hardness of the material of the cover plate 1 is smaller than that of the material of the Pin needle 15, and the cover plate 1 is prepared by using polytetrafluoroethylene material in the utility model, so that the cover plate 1 has excellent non-stick characteristic and lower friction coefficient, and the Pin needle is fixed so as not to fall down when the Pin needle is reversed.
Referring to fig. 5, the top plate 2 is provided with a plurality of through holes 22 and four second positioning holes 22 corresponding to the positions of a plurality of fixing holes 10 of the cover plate, the second positioning holes 22 are corresponding to the first positioning holes 13, in the utility model, the diameter of each through hole 22 is 1.15mm, in the improvement process, the inventor firstly considers reducing the diameter of the through hole of the original top plate 2.1 to achieve the purpose of fixing the Pin needle, but through experiments, only using the improved original top plate 2.1, after the Pin needle is fixed, the dropping probability of the Pin needle is reduced after the top plate is reversed, but because the length of the fixed end of the Pin needle is short, the length of the exposed and suspended side is relatively long, and during the overturning process, the Pin needle deforms to a certain extent, which leads to deviation when the Pin needle is butted with the welding point of the DBC, and the welding precision is reduced. Therefore, the cover plate is additionally arranged to obtain the existing jig, the distance between the Pin needle 15 and the hole is prolonged by additionally arranging the cover plate 1 and the top plate 2, and the problem that the Pin needle part fixed in the fixing hole 10 is too short to bend or break is prevented.
Because the material property of the cover plate 1, the melting point of the cover plate 1 is generally lower than the welding temperature of the Pin needle 15, so that the cover plate 1 and the top plate 2 are not fixedly connected, the cover plate 1 can completely wrap the top plate 2, the cover plate 1 is tightly combined with the top plate 2 during assembly, the assembly of the cover plate 1 and the top plate 2 is inverted during assembly, the cover plate 1 is arranged below the top plate 2, and the Pin needle 15 is inserted into the fixing hole 10 of the cover plate 1 through the through hole 22 of the top plate 2 for fixing.
Referring to fig. 6, the bottom plate 4 is provided with a receiving groove 5, a third positioning hole 6 and a picking groove 7. The picking groove 7 is arranged at two sides of the accommodating groove 5 and communicated with the accommodating groove 5, and the depth of the picking groove 7 is deeper than that of the accommodating groove 5. In the utility model, the accommodating groove 5 is used for accommodating the DBC14, and in order to ensure that the welding position of the Pin needle is accurate, the DBC14 is matched with the shape of the accommodating groove 5, and the DBC14 cannot move after being put into the accommodating groove 5, so that a piece taking groove is arranged, an operator can grasp two sides of the DBC from the piece taking groove after welding is finished, and the DBC can be conveniently taken out without damage.
One end of the positioning bolt 3 passes through the second positioning hole 22 of the top plate 2 to be connected with the first positioning hole 13 of the cover plate 1, and the other end is connected with the third positioning hole 6 of the bottom plate 4. If the diameters of the positioning bolts are equal everywhere, the positioning bolts pass through the second positioning holes and enter the first positioning holes, and then two conditions exist, wherein the diameter of the positioning bolts is slightly smaller than that of the first positioning holes and the second positioning holes, and the cover plate and the top plate slide downwards, so that the pin needle is extruded; the second condition, the diameter of locating bolt slightly is greater than the diameter of first locating hole and second locating hole, and after the locating bolt passed the second locating hole this moment, need extrude the locating bolt and just can get into the second locating hole, lead to the roof, apron and locating bolt's wearing and tearing speed are accelerated, and increase the degree of difficulty of taking out the roof.
Referring to fig. 7, in another preferred embodiment, the positioning pin is a cylinder as a whole, the end with one end presents a cylinder protruding outwards in the middle, the diameter of the largest place is larger than the diameter of the second positioning hole, and the diameter of the second positioning hole is slightly larger than the diameter of the first positioning hole. At this time, the end of the positioning pin presents a middle convex end for fixing the cover plate 1 and the top plate 2. The diameter of the second positioning hole is slightly larger than that of the first positioning hole, at this time, the tail end of the positioning bolt 3 presents one end with a middle convex, can easily pass through the second positioning hole and fix the column at the convex position, and the first positioning hole is fixed at the tail end of the positioning bolt. At this time, the degree of wear is reduced, and the difficulty of taking out the apron and roof is reduced.
In another preferred embodiment, two opposite sides of the cover plate 1 are provided with cover plate fetching grooves 11, the cover plate fetching grooves can enable the top plate combined with the cover plate 1 to be exposed, when a Pin needle is installed in a fixing hole of the cover plate 1, the cover plate 1 and the top plate 2 need to be turned over simultaneously, and a worker can directly support the exposed outer edge of the top plate 2 to complete turning over by arranging the cover plate fetching grooves 11, so that faults that the top plate 2 falls down due to the fact that the top plate 2 cannot be seen are prevented.
Referring to fig. 4-6, in another preferred embodiment, the cover plate 1 and the top plate 2 are provided with viewing openings 12 at opposite positions to the receiving grooves of the bottom plate 4, because in the present utility model, after the Pin needle is installed in the fixing hole of the cover plate 1, the combined cover plate 1, top plate 2 and positioning bolt 3 are aligned with the third positioning hole of the bottom plate 4, whether dropping occurs or not is observed through the viewing openings during installation, and the Pin needle is positioned inaccurately.
In another preferred embodiment, the bottom plate 4 is provided with 4 accommodating grooves 6 and a plurality of fetching grooves 7, and the cover plate 1 and the top plate 2 are also provided with fixing holes 10 and through holes 21 at corresponding positions, and because the existence of the fixing holes 10 reduces the risk of dropping the Pin needles 15, the Pin needle welding can be performed on a plurality of DBCs at one time.
The concrete application scene of the utility model is that a worker inverts the cover plate 1 on a plane, inverts the top plate 2 and then combines the cover plate 1, then inserts Pin needles 15 into the fixing holes 10 after passing through holes 21 of the top plate 1 one by one, after the Pin needles are installed, one end of the middle bulge of the positioning bolt 3 passes through the second positioning holes 22 and enters the first positioning holes 13, then grabs the top plate part exposing the cover plate taking groove 11 to transpose the assembly, inserts the other end of the positioning bolt 3 into the third positioning holes of the bottom plate 4 in a positive installation mode, removes the cover plate 1 from the positioning bolt after the assembly is completed, and places the rest components into a welding furnace to finish welding. After the welding is finished, the top plate and the positioning bolts are taken down, all DBCs are taken out of the accommodating groove 5 through the taking groove 7, the DBCs with the Pin needles welded are obtained, and at the moment, the jig is also split, so that the next assembly can be performed.
According to the Pin needle welding jig provided by the utility model, the cover plate is added on the existing device, and the plurality of fixing holes which are directly slightly smaller than the Pin needle diameter are formed in the cover plate, so that the cover plate and the top plate can be combined and inverted, the Pin needles are inserted into the through holes of the top plate one by one and then fixed in the fixing holes, the risk of Pin needle falling in the assembly process is avoided, the part of the Pin needle remained in the fixing holes and the through holes is lengthened due to the combination of the cover plate and the top plate, the phenomenon of bending and breaking caused by too short Pin needle in the fixing holes is prevented, multiple groups of DBCs can be welded at one time, and the production efficiency and the welding precision are greatly improved.
The above examples merely represent a few embodiments of the utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the utility model, and the utility model is intended to encompass such modifications and improvements.
Claims (8)
1. Pin needle welding jig, its characterized in that includes: the device comprises a cover plate, a top plate, a positioning bolt and a bottom plate;
the cover plate is provided with a plurality of first positioning holes and a plurality of fixing holes, and the diameter of each fixing hole is smaller than that of the Pin needle;
the top plate is provided with a plurality of second positioning holes concentric with the first positioning holes of the cover plate and a plurality of through holes concentric with the fixed holes, and the diameter of each through hole is larger than that of the Pin needle;
the bottom plate is provided with a containing groove and a third positioning hole, the third positioning hole is arranged outside the containing groove, and the third positioning hole and the second positioning hole are concentric;
one end of the positioning bolt penetrates through the second positioning hole of the top plate to be connected with the first positioning hole of the cover plate, and the other end of the positioning bolt is connected with the third positioning hole of the bottom plate.
2. The Pin needle welding jig of claim 1, wherein:
two cover plate fetching grooves are correspondingly arranged on one group of opposite edges of the cover plate.
3. The Pin needle welding jig of claim 2, wherein:
the tail end of one end of the positioning bolt presents a cylinder with a convex middle part, the diameter of the largest part is larger than that of the second positioning hole, and the diameter of the second positioning hole is slightly larger than that of the first positioning hole.
4. The Pin needle welding jig of claim 3, wherein:
two sides of the accommodating groove are provided with a piece taking groove, and the depth of the piece taking groove is deeper than that of the accommodating groove.
5. The Pin needle welding jig of claim 4, wherein:
and the cover plate and the top plate are provided with observation openings which are opposite to the accommodating grooves.
6. The Pin needle welding jig according to any one of claims 1-5, wherein:
the bottom plate is provided with a plurality of accommodating grooves, and each accommodating groove is provided with a corresponding picking groove.
7. The Pin needle welding jig of claim 6, wherein:
the first positioning holes are respectively arranged at four inner top angles of the cover plate.
8. The Pin needle welding jig of claim 7, wherein:
the hardness of the material of apron is less than the hardness of the material of Pin needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321285254.3U CN219852537U (en) | 2023-05-24 | 2023-05-24 | Pin needle welding jig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321285254.3U CN219852537U (en) | 2023-05-24 | 2023-05-24 | Pin needle welding jig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219852537U true CN219852537U (en) | 2023-10-20 |
Family
ID=88341096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321285254.3U Active CN219852537U (en) | 2023-05-24 | 2023-05-24 | Pin needle welding jig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219852537U (en) |
-
2023
- 2023-05-24 CN CN202321285254.3U patent/CN219852537U/en active Active
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| GR01 | Patent grant |