CN215941782U

CN215941782U - Tin furnace anti-oxidation cover structure of wave soldering machine

Info

Publication number: CN215941782U
Application number: CN202120933566.5U
Authority: CN
Inventors: 林晓新; 杨克文; 林友
Original assignee: Ridong Intelligent Equipment Technology Shenzhen Co ltd
Current assignee: Ridong Intelligent Equipment Technology Shenzhen Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-03-04
Anticipated expiration: 2031-04-30

Abstract

The utility model provides an anti-oxidation cover structure of a tin furnace of a wave soldering machine, which comprises an anti-oxidation support and an anti-oxidation sheath, wherein the anti-oxidation support is arranged above the tin furnace, and an impeller shaft penetrates through the anti-oxidation support; the anti-oxidation sheath is sleeved on the position of the impeller shaft, which is contacted with the liquid level of the brazing filler metal, and the upper end of the anti-oxidation sheath penetrates through the anti-oxidation support; the anti-oxidation sheath can move relative to the anti-oxidation support and the impeller shaft, and the upper end of the anti-oxidation sheath is arranged not to be separated from the anti-oxidation support. The tin furnace anti-oxidation cover structure provided by the utility model can effectively reduce the liquid surface area of the contact part of the impeller shaft and the liquid surface of the brazing filler metal, and can contact less air, thereby effectively reducing the oxidation amount of the brazing filler metal nearby when the impeller shaft rotates; the anti-oxidation sheath is hung on the anti-oxidation support and cannot be separated from the lower end of the anti-oxidation support, the anti-oxidation sheath can move up and down, oxides in the sheath and on the impeller shaft are rapidly cleaned, the phenomenon that the impeller shaft is clamped is effectively avoided, and the production efficiency is improved.

Description

Tin furnace anti-oxidation cover structure of wave soldering machine

Technical Field

The utility model relates to the technical field of wave soldering machine equipment, in particular to a tin furnace anti-oxidation cover structure of a wave soldering machine.

Background

The wave soldering machine is formed by jetting molten soft soldering flux into a solder wave required by design through an electric pump or an electromagnetic pump, and can also be formed by injecting nitrogen into a solder pool, so that a printed board with components in advance passes through the solder wave, and the soft soldering of mechanical and electrical connection between a welding end or pin of the components and a pad of the printed board is realized. Wave soldering systems can be widely varied, depending on the different geometries of wave crests used by the machine. When part wave soldering machine during operation, need drive the rotation of impeller through the motor, thereby the brazing filler metal wave crest of a specific shape is formed to the liquid level at the brazing filler metal, the PCB who has loaded components and parts passes the welding process that the brazing filler metal wave crest realized the tie point with certain specific angle and certain immersion depth, and the shaft of being connected between motor and the impeller is faster with the solder oxidation under the condition of the liquid level contact place fast revolution, can form oxides such as tin oxide black powder, the too much gathering of oxide can lead to the wave crest unstability, the molten tin bath bubbling, motor stall scheduling problem even.

In order to slow down the formation of oxides, an oxidation-proof cover is arranged on an impeller shaft in the current part, the lower end of the oxidation-proof cover is reversely buckled below the liquid level of the brazing filler metal in a cup shape, and air is isolated from entering the part of the impeller shaft, which is in contact with the liquid level of the brazing filler metal, so that the oxidation is slowed down. However, the anti-oxidation shield has poor air isolation effect, oxides are still generated, the oxides in the anti-oxidation shield are difficult to clean, and the continuous accumulation of the oxides easily causes the blockage of the impeller, so that the production process is directly influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the tin furnace anti-oxidation cover structure which can reduce the generation of oxides at the contact part of the impeller shaft and the liquid level of the brazing filler metal, is convenient for cleaning the oxides and avoids the phenomenon of blocking the impeller shaft due to the accumulation of the oxides.

The utility model adopts the following technical scheme for solving the technical problems:

the utility model provides a tin furnace anti-oxidation cover structure of a wave soldering machine, which comprises an impeller and an impeller shaft, wherein the impeller shaft is arranged on the top of the tin furnace; the impeller is arranged in the brazing filler metal of the tin furnace; the upper end of the impeller shaft is connected with a power part, the lower end of the impeller shaft penetrates through the liquid level of the brazing filler metal and is connected with the impeller, the power part drives the impeller through the impeller shaft, and a brazing filler metal wave crest in a specific shape is generated in the tin furnace; the tin stove anti oxidation cover structure still includes:

the anti-oxidation support is arranged above the tin furnace, and the impeller shaft penetrates through the anti-oxidation support; and

the anti-oxidation sheath is sleeved on the position of the impeller shaft, which is contacted with the liquid level of the brazing filler metal, and the upper end of the anti-oxidation sheath penetrates through the anti-oxidation support; the anti-oxidation sheath can move relative to the anti-oxidation support and the impeller shaft, and the upper end of the anti-oxidation sheath is arranged not to be separated from the anti-oxidation support.

Further, a through hole is formed in the anti-oxidation support; the impeller shaft passes through the through hole.

Furthermore, the diameter of the through hole is larger than that of the impeller shaft, and a gap is formed between the through hole and the side wall of the impeller shaft; the anti-oxidation sheath is arranged in the gap.

Furthermore, the upper end of the anti-oxidation sheath is provided with a clamping part; the diameter of the clamping part is larger than that of the through hole.

Furthermore, the wave crest motor fixing bracket is also included; the power part is a motor and is arranged on the wave crest motor fixing bracket; the impeller shaft passes through the wave crest motor fixing bracket and is connected with the power part.

Furthermore, the anti-oxidation support is fixed on the lower surface of the wave crest motor fixing support, and an accommodating space is formed between the anti-oxidation support and the wave crest motor fixing support; the upper end of the anti-oxidation protective sleeve extends into the accommodating space.

By adopting the technical scheme, compared with the prior art, the utility model has the following technical effects:

compared with the anti-oxidation cover structure of a wave soldering machine in the prior art, the diameter of the anti-oxidation sheath of the anti-oxidation cover structure is set to be as small as possible, but a certain space is still reserved between the anti-oxidation sheath and the impeller shaft, the space can ensure that the impeller shaft rotates at high speed and cannot contact the anti-oxidation sheath, the anti-oxidation sheath arranged in the way can effectively reduce the liquid level area of the contact part of the impeller shaft and the liquid level of brazing filler metal, and can contact less air, so that the oxidation amount of the brazing filler metal nearby when the impeller shaft rotates is effectively reduced; the anti-oxidation sheath is hung on the anti-oxidation support and cannot be separated from the lower end of the anti-oxidation support, the anti-oxidation sheath can move up and down, oxides in the sheath and on the impeller shaft are rapidly cleaned, the phenomenon that the impeller shaft is clamped is effectively avoided, and the production efficiency is improved.

Drawings

FIG. 1 is a front view of a tin furnace oxidation shield structure of a wave soldering machine according to an embodiment of the present invention;

FIG. 2 is a left side view of a tin furnace oxidation shield structure of a wave soldering machine according to an embodiment of the present invention;

wherein the reference numerals are: the anti-oxidation structure comprises a 10-tin furnace anti-oxidation cover structure, a 11-anti-oxidation support, a 12-anti-oxidation sheath, a 20-wave motor fixing support, a 30-impeller shaft and a 40-impeller.

Detailed Description

The technical scheme of the utility model is further described in detail in the following by combining the attached drawings so as to better understand the utility model, but the utility model is not limited by the scope of the utility model.

As shown in fig. 1-2, the utility model provides a tin furnace oxidation preventing cover structure of a wave soldering machine, which comprises an impeller 40, an impeller shaft 30, an oxidation preventing support 11 and an oxidation preventing sheath 12. The impeller 40 is arranged in the liquid solder of the tin furnace; the upper end of the impeller shaft 30 is connected with a power component, and the lower end extends into the liquid level of the brazing filler metal and is connected with an impeller 40. In wave soldering, a power component can drive an impeller 40 to drive the impeller through an impeller shaft 30, a brazing filler metal wave with a specific shape is generated in a tin furnace, and soldering is carried out, and the shape of the brazing filler metal wave can be adjusted by selectively adjusting the power of the power component, the shape of the impeller 40 and the like.

The improvement of the utility model lies in the arrangement of the oxidation preventing bracket 11 and the oxidation preventing sheath 12. The anti-oxidation support 11 is fixed above the tin furnace, and the impeller shaft 30 passes through the anti-oxidation support 11. The anti-oxidation sheath 12 is sleeved on the impeller shaft 30 and is positioned on the impeller shaft 30 at a position contacting with the liquid level of the brazing filler metal, namely, the anti-oxidation sheath 12 also penetrates through the liquid level of the brazing filler metal. The inner surface of the oxidation-preventing sheath 12 does not contact the impeller shaft 30, and the impeller shaft 30 does not contact the oxidation-preventing sheath 12 when rotating at high speed under the action of the power component.

Because the anti-oxidation sheath 12 is sleeved on the impeller shaft 30, when the impeller shaft 30 rotates, the liquid level of the brazing filler metal outside the anti-oxidation sheath 12 cannot turn over under the action of the impeller shaft 30, and therefore the brazing filler metal cannot be oxidized too fast. The inner diameter of the anti-oxidation sheath 12 can be set as small as possible on the premise of not influencing the high-speed rotation of the impeller shaft 30, so that the space between the inner surface of the anti-oxidation sheath 12 and the outer surface of the impeller shaft 30 is made as small as possible, the liquid surface area of the contact part of the impeller shaft 30 and the liquid surface of the brazing filler metal is smaller, less air enters between the anti-oxidation sheath 12 and the impeller shaft 30, the contact between the brazing filler metal in the anti-oxidation sheath and the air is reduced, and the oxidation amount of the brazing filler metal is effectively reduced.

The upper end of the anti-oxidation sheath 12 passes through the anti-oxidation bracket 11; and the oxidation preventing sheath 12 is axially movable relative to the oxidation preventing holder 11 and the impeller shaft 30. Specifically, a through hole is arranged on the anti-oxidation support 11, the impeller shaft 30 passes through the through hole, the diameter of the through hole is larger than that of the impeller shaft 30, and a gap is formed between the through hole and the side wall of the impeller shaft 30; the oxidation-preventing jacket 12 also passes through the through hole and is disposed in the gap. The outer diameter of the oxidation-preventing sheath 12 is the same as the diameter of the through hole, and the sheath is exactly engaged with the through hole and immovable in the horizontal direction, so as to prevent the impeller shaft 30 from contacting with the impeller shaft 30 when the impeller shaft 30 rotates.

The upper end of the oxidation preventing sheath 12 is provided so as not to be removed from the oxidation preventing bracket 11. Specifically, the upper end of the oxidation-preventing sheath 12 is provided with a clamping part in a ring shape, and the diameter of the clamping part is larger than that of the through hole, so that the oxidation-preventing sheath 12 is suspended in the oxidation-preventing support 11, cannot fall out of the oxidation-preventing support 11, and can move relative to the oxidation-preventing support 11 and the impeller shaft 30. When the amount of the oxides in the anti-oxidation sheath 12 is large, the anti-oxidation sheath 12 can be lifted to be separated from the liquid level of the brazing filler metal, the oxides in the anti-oxidation sheath 12 and on the impeller shaft 30 are cleaned by a cleaning tool, the phenomenon that the impeller shaft 30 is clamped due to excessive accumulated oxides is avoided, and the cleaning is convenient.

In a preferred embodiment of the present invention, the oxidation preventing bracket 11 is fixed to the lower surface of the crest motor fixing bracket 20. The wave motor mount 20 is a component of a prior art wave soldering machine. The power part is a motor and is arranged on the wave crest motor fixing bracket 20; the impeller shaft 30 also passes through the wave motor mounting bracket 20 and connects to the power unit. The anti-oxidation support 11 is in a groove shape, and an accommodating space is formed between the anti-oxidation support and the wave crest motor fixing support 20; the upper end of the anti-oxidation sheath 12 extends into the accommodating space.

The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications or alterations to this practice will occur to those skilled in the art and are intended to be within the scope of this invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.

Claims

1. An anti-oxidation cover structure of a tin furnace of a wave soldering machine comprises an impeller (40) and an impeller shaft (30); the impeller (40) is arranged in the brazing filler metal of the tin furnace; the upper end of the impeller shaft (30) is connected with a power part, the lower end of the impeller shaft penetrates through the liquid level of the brazing filler metal and is connected with the impeller (40), the power part drives the impeller (40) through the impeller shaft (30), and a brazing filler metal wave crest with a specific shape is generated in the tin furnace; it is characterized in that the tin furnace oxidation preventing cover structure further comprises:

the anti-oxidation support (11) is arranged above the tin furnace, and the impeller shaft (30) penetrates through the anti-oxidation support (11); and

the anti-oxidation sheath (12) is sleeved on the impeller shaft (30) and is in contact with the liquid level of the brazing filler metal, and is not in contact with the impeller shaft (30); the upper end of the anti-oxidation sheath (12) penetrates through the anti-oxidation support (11);

the anti-oxidation sheath (12) can move relative to the anti-oxidation support (11) and the impeller shaft (30), and the upper end of the anti-oxidation sheath (12) is arranged not to be disengaged from the anti-oxidation support (11).

2. A tin furnace oxidation shield structure according to claim 1, wherein a through hole is provided on the oxidation preventing support (11); the impeller shaft (30) passes through the through hole.

3. A tin furnace oxidation shield structure according to claim 2, wherein the diameter of the through hole is larger than the diameter of the impeller shaft (30), and a clearance is formed between the through hole and the side wall of the impeller shaft (30); the anti-oxidation protective sleeve (12) is arranged in the gap, and the outer diameter of the anti-oxidation protective sleeve (12) is the same as the diameter of the through hole.

4. A tin furnace oxidation prevention cover structure according to claim 3, wherein a snap-fit portion is provided at an upper end of the oxidation prevention sheath (12); the diameter of the clamping part is larger than that of the through hole.

5. A tin furnace oxidation shield structure according to claim 1, further comprising a wave motor fixing bracket (20); the power part is a motor and is arranged on the wave crest motor fixing bracket (20); the impeller shaft (30) penetrates through the wave crest motor fixing bracket (20) and is connected with the power part.

6. A tin furnace oxidation prevention cover structure according to claim 5, wherein the oxidation prevention support (11) is fixed on the lower surface of the wave crest motor fixing support (20) and forms an accommodating space with the wave crest motor fixing support (20); the upper end of the anti-oxidation protective sleeve extends into the accommodating space.

7. A tin furnace oxidation shield arrangement according to claim 1, wherein an inner surface of the oxidation protection sheath (12) is spaced from an outer surface of the impeller shaft (30).