CN206165000U - Hot press welding pressure head - Google Patents
Hot press welding pressure head Download PDFInfo
- Publication number
- CN206165000U CN206165000U CN201621152870.1U CN201621152870U CN206165000U CN 206165000 U CN206165000 U CN 206165000U CN 201621152870 U CN201621152870 U CN 201621152870U CN 206165000 U CN206165000 U CN 206165000U
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- China
- Prior art keywords
- tin
- heart yearn
- pressure head
- groove
- chamfering
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Abstract
The utility model provides a hot press welding pressure head, include the main part and set gradually the recess on the main part, wherein, the recess the cross section with treat that welded heart yearn cross -section is corresponding, the main part is pressed to the top of waiting to weld the circuit board substrate of heart yearn, and the heart yearn tip in collinear footpath not do not be spacing in the recess that corresponds, and the tip one side of keeping away from the heart yearn at the recess is provided with the chamfer. Utilize above -mentioned utility model, can realize the synchronous welding of all kinds of lines footpath heart yearn, avoid the problem of crowded tin short circuit, improve the yield of product.
Description
Technical field
The utility model is related to soldering wires technical field, more specifically, is related to a kind of thermocompression bonding of thermocompression bonder
Connect pressure head.
Background technology
As the development of electronic product small, PCBA are also less and less in design aspect, element is more and more, leads
Cause the spacing between pad and components and parts also less and less.Simultaneously for the product of welding heart yearn, the quantity of heart yearn is increasingly
Many, the thickness of line footpath is also not of uniform size, causes the pad supporting with it also not of uniform size, can cause the pre-plating tin tin amount of pad
There is a problem of not of uniform size.
Hotbar welding (thermal compression welding) as a kind of current relatively conventional welding manner, no matter in welding efficiency or
Welding cost aspect is respectively provided with very big advantage, when Product jointing position and components and parts are in larger distance, can be without considering welding
The problem of crowded tin.But for product is intended to the development for minimizing, the requirement also more and more higher to Hotabr welding, weldering
Disk to components and parts are often below 1mm apart from d, for the welding of such product, continue to adopt original pressure head structure, squeeze tin short circuit
Will raise Deng fraction defective.
As shown in the existing pressure heads of Fig. 1 and the signal state of heart yearn welding, the tin head 3 ' of the end of heart yearn 2 ' is limited in main body
In the groove in portion 1 ', before invading the tin fusing on the tin and board substrate 4 ' in heart yearn 2 ', pad tin point is adjacent apart from its
The distance of components and parts 5 ' is that d is less than 1mm.
Because needing pre-plating tin (forming pad tin point) before PCBA pad solders, there is tolerance in its tin plating thickness, while welding
Diameter of the heart yearn after wicking there is also tolerance, random cooperation to each other, occur the core line diameter upper limit and pad preplating unavoidably
The cooperation of tin upper thickness limit, is thus the increase for causing total tin amount, and after Hotbar welding, unnecessary tin will be in hot pressing
Extrude under the pressurize of head, when remaining tin is pressed against solder joint front end, that is, when having the side of components and parts, remaining tin will be contacted with components and parts,
Ultimately result in short circuit and product is bad.
Utility model content
In view of the above problems, the purpose of this utility model is to provide a kind of thermal compression welding pressure head, and current pressure head has been solved not
The miniaturization demand of product can be met, there is the risk that molten tin contacts conducting with components and parts, cause product short-circuit and bad
The problems such as.
The thermal compression welding pressure head that the utility model is provided, including main part and the groove that is successively set on main part；
Wherein, the cross section of groove is corresponding with core section to be welded；Main part is depressed into the board substrate of heart yearn to be welded
Top, the heart yearn end of different line footpaths is spacing in corresponding groove respectively；Also, set away from the end side of heart yearn in groove
It is equipped with chamfering.
Furthermore it is preferred that structure be that chamfering is set to arcuate structure；Chamfering to the direction away from board substrate extends.
Furthermore it is preferred that structure be that Copper Foil and the pad tin point above Copper Foil are provided with board substrate；
The end of heart yearn is weldingly fixed at pad tin point.
Furthermore it is preferred that structure be that chamfering forms the empty avoiding space for housing the tin that overflows, the volume in empty avoiding space is respective slot
The 10%～30% of the volume of receiving tin.
Furthermore it is preferred that structure be that groove accommodates the volume of tin less than volume of the heart yearn on pad tin point and pad tin
The volume sum of point.
Furthermore it is preferred that structure be, main part heat up heating, be wrapped in the tin on the outside of heart yearn and mutually melt with pad tin point
Melt, unnecessary tin backflow filling is to the chamfering of respective slot.
Furthermore it is preferred that structure be that groove is domes, the size of chamfering and the proportional example of corresponding groove size are closed
System.
Furthermore it is preferred that structure be that main part is titanium alloy or molybdenum alloy part.
Knowable to technical scheme above, thermal compression welding pressure head of the present utility model arranges different on same main part
Multiple grooves of size, can realize to welding while different line footpath heart yearns, and by arranging Longitudinal extending in recess edge
Chamfering, tin unnecessary in welding process is can extend in chamfering, it is to avoid transverse shear stress is extremely on board substrate for remaining tin
Contact with components and parts, the performance of impact product, thermal compression welding pressure head of the present utility model, simple structure, speed of welding is fast, quality
It is high.
Description of the drawings
By reference to below in conjunction with the explanation of accompanying drawing, and with being more fully understood to of the present utility model, this practicality is new
Other purposes of type and result will be more apparent and should be readily appreciated that.In the accompanying drawings：
Fig. 1 is existing pressure head and heart yearn welded condition schematic diagram；
Fig. 2-1 is the thermal compression welding pressure head structure schematic diagram one according to the utility model embodiment；
Fig. 2-2 is the thermal compression welding pressure head structure schematic diagram two according to the utility model embodiment；
Fig. 3 is the thermal compression welding pressure head and heart yearn welded condition schematic diagram according to the utility model embodiment.
Reference therein includes：Main part 1,1 ', heart yearn 2,2 ', tin head 3,3 ', board substrate 4,4 ', components and parts
5th, 5 ', groove 11, chamfering 12.
In all of the figs identical label indicates similar or corresponding feature or function.
Specific embodiment
To describe the structure of the thermal compression welding pressure head of the utility model embodiment in detail, below with reference to accompanying drawing to this practicality
New specific embodiment is described in detail.
Fig. 2-1 and Fig. 2-2 shows from different perspectives respectively the knot according to the utility model embodiment thermal compression welding pressure head
Structure.
As shown in Figure 1, Figure 2-1 and Fig. 2-2 is common shown, and the thermal compression welding pressure head of the utility model embodiment is arranged on hot pressing
On bonding machine, thermal compression welding pressure head includes main part 1 and several grooves 11 being successively set on main part 1, each groove
11 size is not fully identical, and the cross section of groove 11 is corresponding with the section of heart yearn 2 to be welded, at the same time to various line footpaths
Heart yearn 2 when being welded, groove 11 can be set to distinguish corresponding position and knot from the section of heart yearn 2 of different line footpaths
Structure, when main part 1 is depressed into the board substrate top of heart yearn to be welded 2, the end of the heart yearn 2 of different line footpaths is (in the end
Have tin to immerse, alternatively referred to as tin head, similarly hereinafter) it is spacing in corresponding groove 11 respectively, it is real by heating to thermal compression welding pressure head
The welding of existing heart yearn 2 and board substrate.
Wherein, to guarantee the welding quality of product, it is to avoid because tin causes less rosin joint, Yin Xiduo to cause to weld crowded tin or short circuit
The problems such as, thermal compression welding pressure head of the present utility model is provided with chamfering 12, chamfering in groove 11 away from the side of the end of heart yearn 2
12 can form excessive tin space (housing the empty avoiding space of the tin that overflows), can prevent unnecessary while welding quality is met
Tin is extruded to neighbouring components and parts and causes short circuit.
Specifically, the thermal compression welding pressure head of the utility model embodiment, including main part 1, be arranged on it is recessed on main part 1
Groove 11, and it is arranged on the chamfering 12 of groove 11 and the junction of main part 1；Wherein, chamfering 12 is arranged on main part 1 away from heart yearn
The side of 2 ends, the i.e. position of chamfering 12 is arranged on main part 1 and (is adjacent near first device during heart yearn welding away from components and parts
Part) side, so as to the unnecessary tin that is extruded during welding is back in the excessive tin space of chamfering 12, prevent remaining tin transverse shear stress
To components and parts place side.
In addition, the circuit board of welding heart yearn 2 can be the classes such as PCB (Printed Circuit Board, printed circuit board (PCB))
Like sub-structure, such circuit board generally includes board substrate, the Copper Foil being arranged on board substrate, welding heart yearn it
Before, in addition it is also necessary to the pre-plating tin on Copper Foil, i.e. pad pre-plating tin process, to form the pad tin point above Copper Foil, heart yearn 2
Tin head 3 is then weldingly fixed at pad tin point.
After Fig. 3 shows when being welded with heart yearn according to the thermal compression welding pressure head of the utility model embodiment and welding is finished
Signal state.
Jointly shown to Fig. 3 with reference to Fig. 2-1, the tin head 3 of heart yearn 2 to be welded is placed on the pad tin of board substrate 4
At point, thermocompression bonder control thermal compression welding pressure head is pushed and heated, 11 points of the groove in thermal compression welding crimp body portion 1
Be not stuck in the top of heart yearn 2 of correspondence line footpath, due to the pad tin point position components and parts 5 adjacent thereto on board substrate 4 it
Between be typically smaller than 1mm apart from d, to prevent Yu Xiyi to components and parts 5, in groove 11 away from components and parts 5 or away from tin head 3
Side the chamfering 12 of arcuate structure is set, chamfering 12 upwardly extends along the direction away from board substrate 4.
To meet the welding demand to the heart yearn 2 of all kinds of line footpaths, can be according to the big of the thickness of heart yearn 2 and pad tin point
It is little come budget welding process in produce total tin amount, so as to be directed to different grooves 11, different chamferings 12 are set.That is, chamfering 12
Size can be designed according to the actual conditions of heart yearn 2.
For example, simulating the volume to the size of chamfering 12 and empty avoiding space by 3D carries out budget, if the volume of groove is V1,
The volume of pad tin point is V3, and volume of the heart yearn 2 on pad tin point is V4；Understand, when welding to product, groove is needed
The cumulative volume to be accommodated is V2=V3+V4, to guarantee that the groove of main part 1 can completely crimp product, it is to avoid rosin joint occur, if
Volume V1 for determining groove is necessarily less than volume V2 that groove needs to contain, and now, unnecessary tin can be extruded to the chamfering of groove
In 12.
In a specific embodiment of the present utility model, groove 11 accommodates the volume of tin and is less than heart yearn 2 in pad tin
The volume sum of volume and pad tin point on point, unnecessary tin is received by the empty avoiding space of chamfering 12, empty avoiding space
Volume is the 10%～30% of the volume that respective slot 11 accommodates tin.That is, V1 volumes less than the ratio of V2 volumes 10%～
30%.
Wherein, the size of chamfering 12 can be with proportional, in the feelings that groove 11 is larger with the size of corresponding groove 11
Corresponding chamfering 12 can also arrange somewhat larger under condition, in thermal compression welding pressure head of the present utility model, correspondence chamfering 12
Empty avoiding space could be arranged to the 10%～30% of volume V1 of groove 11.
As shown in figure 3, in welding process, controlling main part 1 by thermocompression bonder first and pushing and heat, until invading
The tin for entering the outside of heart yearn 2 is mutually melted with pad tin point, and unnecessary tin then flows back filling to the chamfering 12 of respective slot 11, and
Progressively it is cooled into solder joint；Finally, hot pressing control pressure head separates and completes welding with solder joint.Wherein, due to the presence of chamfering 12,
Solder joint forms the bossing corresponding with chamfering 12 in the side away from components and parts 5, can guarantee the situation of welding quality
Under, prevent remaining tin from extruding to neighbouring components and parts 5, it is to avoid solder joint front end contacts the risk for causing short circuit with components and parts 5.
In another specific embodiment of the present utility model, positioned at the cross section of the groove 11 of the medium position of main part 1
Product is successively more than the cross-sectional area of the groove 11 positioned at its both sides；Or, the groove of different size cross section is arranged in a crossed manner；Or
Person, positioned at main part medium position groove cross-sectional area successively less than the cross-sectional area of groove etc. positioned at its both sides, make
The groove of largest face cross section contacts first heating with the wire rod of most thick heart yearn.The set location and number of groove
It is configured with the thickness and radical according to the heart yearn of actual welding, however it is not limited to structure shown in Fig. 2-1 and Fig. 2-2.
It is further to note that the groove 11 being arranged on main part 1 could be arranged to domes, or with it is to be welded
The corresponding other structures of the heart yearn 2 that connects, are the difficulty of processing for reducing chamfering, and main part 1 can adopt titanium alloy, molybdenum alloy
Metalwork of part or similar material etc..
For pressure head defect of the prior art：The groove of pressure head is deepened, when heart yearn volume lower limit and pad pre-plating tin
When lower thickness limit coordinates, pressure head easily occur cannot touch welding product, cause rosin joint；And widen the width of pressure head,
Just occur that heart yearn can not completely attach to the situation of pad Copper Foil during welding, the heat transfer of temperature is affected, when causing unit to be welded
Situations such as interior pad tin melts insufficient.
Therefore, the thermal compression welding pressure head that the utility model is provided, arranges inconsistent several of size recessed on main part
Groove, realizes the synchronous welding of various line footpath heart yearns；Also, vertically extending chamfering is set in the side of groove, in welding process
Unnecessary tin can be housed in the empty avoiding space of chamfering, and remaining tin can be maintained at the top of solder joint after the completion of welding, prevent weldering
Crowded tin is connect to the front end of solder joint, it is to avoid itself and components and parts contact short circuit, the qualification rate of product can be greatly improved, be that product is small-sized
The development changed and complicate lays the foundation.
Above with reference to accompanying drawing describe in an illustrative manner according to the utility model proposes thermal compression welding pressure head.But,
It will be appreciated by those skilled in the art that the thermal compression welding pressure head proposed for above-mentioned the utility model, can with without departing from
Various improvement are made on the basis of the utility model content.Therefore, protection domain of the present utility model should be by appended right
The content of claim determines.
Claims (8)
1. a kind of thermal compression welding pressure head, it is characterised in that including main part and the groove being successively set on the main part；
Wherein,
The cross section of the groove is corresponding with core section to be welded；
The main part is depressed into the top of the board substrate of heart yearn to be welded, and the heart yearn end of different line footpaths is spacing right respectively
In the groove answered；Also,
The end side of the heart yearn is provided with chamfering in the groove.
2. thermal compression welding pressure head as claimed in claim 1, it is characterised in that
The chamfering is set to arcuate structure；
The chamfering to the direction away from the board substrate extends.
3. thermal compression welding pressure head as claimed in claim 1, it is characterised in that
Copper Foil and the pad tin point above the Copper Foil are provided with the board substrate；
The end of the heart yearn is weldingly fixed at the pad tin point.
4. thermal compression welding pressure head as claimed in claim 3, it is characterised in that
The groove accommodates the body that the volume of tin is less than volume of the heart yearn on the pad tin point and the pad tin point
Product sum.
5. thermal compression welding pressure head as claimed in claim 3, it is characterised in that
The main part heats up and heats, and is wrapped in the tin on the outside of the heart yearn and mutually melts with the pad tin point, unnecessary tin
Backflow filling is to the chamfering of respective slot.
6. thermal compression welding pressure head as claimed in claim 1, it is characterised in that
The chamfering forms the empty avoiding space for housing the tin that overflows, and the volume in the empty avoiding space is the volume that respective slot accommodates tin
10%～30%.
7. thermal compression welding pressure head as claimed in claim 1, it is characterised in that
The groove is domes, the size of the chamfering and corresponding groove size proportional.
8. thermal compression welding pressure head as claimed in claim 1, it is characterised in that
The main part is titanium alloy or molybdenum alloy part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621152870.1U CN206165000U (en) | 2016-10-24 | 2016-10-24 | Hot press welding pressure head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621152870.1U CN206165000U (en) | 2016-10-24 | 2016-10-24 | Hot press welding pressure head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206165000U true CN206165000U (en) | 2017-05-10 |
Family
ID=58654171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621152870.1U Active CN206165000U (en) | 2016-10-24 | 2016-10-24 | Hot press welding pressure head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206165000U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717153A (en) * | 2017-10-30 | 2018-02-23 | 歌尔股份有限公司 | A kind of cored wire wicking welding method and system |
| CN111106500A (en) * | 2018-10-25 | 2020-05-05 | 广东皓英电子科技有限公司 | Tin welding tool |
| CN112247307A (en) * | 2020-10-09 | 2021-01-22 | 昆山联滔电子有限公司 | Hot-press welding device and hot-press welding process |
-
2016
- 2016-10-24 CN CN201621152870.1U patent/CN206165000U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717153A (en) * | 2017-10-30 | 2018-02-23 | 歌尔股份有限公司 | A kind of cored wire wicking welding method and system |
| CN107717153B (en) * | 2017-10-30 | 2019-08-27 | 歌尔股份有限公司 | A kind of core wire wicking welding method and system |
| CN111106500A (en) * | 2018-10-25 | 2020-05-05 | 广东皓英电子科技有限公司 | Tin welding tool |
| CN112247307A (en) * | 2020-10-09 | 2021-01-22 | 昆山联滔电子有限公司 | Hot-press welding device and hot-press welding process |
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| GR01 | Patent grant |