CN201312417Y - Single-opened and full-closed type kettle opening - Google Patents
Single-opened and full-closed type kettle opening Download PDFInfo
- Publication number
- CN201312417Y CN201312417Y CN 200820216454 CN200820216454U CN201312417Y CN 201312417 Y CN201312417 Y CN 201312417Y CN 200820216454 CN200820216454 CN 200820216454 CN 200820216454 U CN200820216454 U CN 200820216454U CN 201312417 Y CN201312417 Y CN 201312417Y
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- China
- Prior art keywords
- tin
- kou
- welding
- pcba plate
- opening
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- Expired - Fee Related
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Abstract
The utility model relates to a tin furnace component for welding tin on PCBA plates, in particular to a single-opened full-closed kettle opening for welding electronic elements on a PCBA plate of a magnetic induction motor. The kettle opening is rectangular, and at least one tin spilling opening is disposed on one side of the kettle opening, wherein the tin spilling opening is a rectangular hole with a size of 3mm*11mm. The utility model with simple structure is capable of effectively improving welding efficiency and is adaptable to large scale automatic production. Besides, the utility model can effectively prevent an oxide layer of a surface layer of tin liquids from remaining on the surfaces of the PCBA plates, thereby guaranteeing the quality of welding spots.
Description
Technical field
The utility model relates to a kind of tin stove parts of the PCBA of being used for boards solder, especially a kind of be used on the magnetic induction motor welding electronic component on the PCBA plate singly open the Totally-enclosed-type tin furnace kettle mouth.
Background technology
Common wave-soldering adopts manual operations usually, and production efficiency is lower, for the comparatively intensive PCBA plate of need pad, this welding manner is more inadequate, in addition, because stannum export too small (generally long 2 millimeters), can bring the obstruction of scruff, thereby cause the large tracts of land of rosin joint to produce Hu Kou; At the comparatively intensive PCBA plate of pad, the kettle of employing mouth structure is also arranged, but common tin furnace kettle mouth is flat mouthful design, in order to realize scolding tin operation to the PCBA plate, generally need maintenance distance once between PCBA plate and kettle mouth, guarantee to make tin liquor can the electric elements on the PCBA plate of top be welded on the one hand from the Hu Kou ejection, guarantee simultaneously can in time discharge Hu Kou from the tin liquor of Hu Kou ejection subsequently, prevent that the kettle mouth pressure is excessive, influence welding quality, but also there is fault of construction in this structure: when tin liquor when Hu Kou sprays, because the tin liquor of upper space is owing to directly contact the formation oxide layer with air, this part oxide layer at first contacts with the PCBA plate of top along with tin liquor is gushed out from Hu Kou, in the wings under the frontal impact of tin liquor, make this part oxide layer oppressed on PCBA plate face, be difficult for it being taken away, make oxide layer remain between solder joint and the PCBA plate, have a strong impact on welding quality by the kettle mouth tin liquor of gushing out subsequently.
Summary of the invention
In order to overcome the deficiency that above-mentioned various scolding tin exists, when especially adopting the intensive PCBA plate of the point-to-point wave-soldering butt welding point of automatic selectivity to weld, inefficiency, be unsuitable for extensive batch machining, and contact easily forms the deficiency of rosin joint, it is a kind of simple in structure that the utility model provides, and can effectively improve welding efficiency, guarantees the tin furnace kettle mouth of the quality of welded contact.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of Totally-enclosed-type Hu Kou that singly opens, described Hu Kou is shaped as rectangle, is provided with at least one excessive tin hole in the side of Hu Kou.Excessive tin hole has certain distance from stannum export; played the effect that shifts to an earlier date pressure release to Hu Kou; tin liquor in can the urinal mouth does not just go out from going out the tin orifice flow when touching the PCBA plate at Hu Kou top in advance; tin liquor is back in the tin stove along the outer wall of Hu Kou, and the electronic devices and components of kettle mouth periphery are effectively exempted from the weldering protection.
In order to make the tin hole of overflowing have good pre-pressure release effect, further: described excessive tin hole is of a size of 3 * 11mm.
The existence in excessive tin hole can effectively change the flow direction of tin liquor behind ejection Hu Kou.After tin liquor sprays from Hu Kou, tin liquor can preferentially go out from the tin orifice flow that overflows, so just form certain tin stream that flows to, making the oxide layer of the superiors can directly do not impacted is adsorbed onto on the PCBA plate, even there is the partial oxidation layer to be adsorbed onto on the PCBA plate, can be washed away by the tin liquor that sprays from Hu Kou subsequently, having guaranteed can residual oxide layer not influence the soldering quality between scolding tin and PCBA plate yet; On the other hand, because surface tension, tin liquor upper surface in the kettle mouth is spherical shape, make under the not high situation of furnace pressure, may appear at kettle mouth edge and form rosin joint, influence welding quality, the existence in excessive tin hole, change the flow direction of kettle mouth tin liquor, made tin liquor can maximum possible cover the PCBA plate of kettle mouth top, guaranteed the adequacy and the fastness of welding.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model kettle mouth structure schematic diagram.
Fig. 2 is the placement location schematic diagram of the utility model on the PCBA plate.
1. excessive tin holes, 2. electronic devices and components 3.PCBA plates among the figure
Embodiment
A kind of Totally-enclosed-type Hu Kou that singly opens as shown in Figure 1, described Hu Kou is shaped as rectangle, is provided with at least one excessive tin hole 1 in the side of Hu Kou, and described excessive tin hole 2 is a rectangular opening, and it is of a size of 3 * 11mm.
As shown in Figure 2, Hu Kou described in the utility model is mainly used in the welding of the electronic devices and components 2 of single row or multiple rows lead-in wire short on the PCBA plate 3, and other electronic devices and components that need exempt to weld 2 are all arranged around Hu Kou.Excessive tin hole 1 has certain distance from stannum export; played the effect that shifts to an earlier date pressure release to Hu Kou; just flow out from going out tin hole 1 in advance in the time of can making tin liquor in the kettle mouth not touch the PCBA plate 3 at Hu Kou top; tin liquor is back in the tin stove along the outer wall of Hu Kou, and the electronic devices and components of kettle mouth periphery are effectively exempted from the weldering protection.The quantity of excessive tin mouth 1 is pressed decision according to kettle mouth tin, press when too high at tin, in time discharge for guaranteeing tin liquor from the tin hole 1 of overflowing, avoid the tin liquor part tin liquor to be trickled to peripheral other electronic devices and components that need exempt to weld 2 of kettle mouth, the tin hole 1 of overflowing can also be set on other other side of Hu Kou from the ejection of kettle mouth oral area.
During use, the PCBA plate is placed on the precalculated position of kettle mouth top, and board plane and kettle mouth stannum export are maintained a certain distance, generally be controlled at 2~4mm.The shape of Hu Kou can determine that Hu Kou is designed to rectangular shape usually according to the distribution situation of PCBA plate welding position, and its length is 6~11mm.For the welding position is irregular concentrated distribution, can adopt a plurality of rectangle Hu Kou to piece together required welding shape.Tin liquor keeps earlier certain liquid level to store in the kettle mouth 1~3 minute, the PCBA plate to be welded of top is carried out preheating, so that preceding operation is removed the oxide layer on the PCBA plate at the scaling powder generation chemical reaction of PCBA plate position to be welded spraying.Afterwards, the electronic startup of tin stove, push to Hu Kou by the tin liquor of exerting pressure the tin furnace interior, the continuous lifting of tin liquor face in the kettle mouth, and tin liquor ejects kettle mouth stannum export the most at last, contacts with the PCBA plate of top and welds, and is guaranteeing that tin liquor and PCBA plate fully weld, unnecessary tin liquor can be discharged from the tin hole of overflowing, and takes away the oxide layer and the impurity of tin liquor top layer.At last, take off the PCBA plate, finish the welding of ground PCBA plate from kettle mouth top.
Because adopted kettle mouth method for designing flexibly, enlarged effective solder side, thereby made speed of welding fast on year-on-year basis more than three times with international " automatic selectivity welding tin stove ".
Because Hu Kou has adopted excessive tin hole design, this scheme has just been removed the main scruff of welding quality and the oxide skin on tin liquor surface of influencing before welding, the qualification rate of welding is reached more than 99.9%.
Claims (2)
1. singly open Totally-enclosed-type Hu Kou for one kind, it is characterized in that: described Hu Kou is shaped as rectangle, is provided with at least one excessive tin hole (1) in the side of Hu Kou.
2. the Totally-enclosed-type Hu Kou that singly opens according to claim 1 is characterized in that: described excessive tin hole (1) is a rectangular opening, is of a size of 3 * 11mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200820216454 CN201312417Y (en) | 2008-11-25 | 2008-11-25 | Single-opened and full-closed type kettle opening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200820216454 CN201312417Y (en) | 2008-11-25 | 2008-11-25 | Single-opened and full-closed type kettle opening |
Publications (1)
Publication Number | Publication Date |
---|---|
CN201312417Y true CN201312417Y (en) | 2009-09-16 |
Family
ID=41109673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 200820216454 Expired - Fee Related CN201312417Y (en) | 2008-11-25 | 2008-11-25 | Single-opened and full-closed type kettle opening |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN201312417Y (en) |
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2008
- 2008-11-25 CN CN 200820216454 patent/CN201312417Y/en not_active Expired - Fee Related
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20091225 |