Tin wire feeder nozzle with heating device

Abstract

The invention discloses a tin wire feeder nozzle with a heating device. The tin wire feeder nozzle comprises a hollow guide pipe and a needle nozzle. One end of the guide pipe is a feeding end for receiving a tin wire, and the guide pipe guides and conveys the tin wire; the other end of the guide pipe is a discharging end with an external thread; the tail end of the needle nozzle is screwed and assembled at the discharge end of the catheter; the tip of the needle nozzle outputs a tin wire; the outer wall face of the guide pipe wraps the heating mechanism in a surrounding mode. According to the invention, the heating mechanism is arranged at the guide pipe for conveying the tin wire to preheat the tin wire, so that moisture contained in the soldering flux in the tin wire is evaporated in advance and escapes when the tin wire is discharged out of the needle nozzle, and therefore, tin beads are prevented from being splashed out due to vaporization of the moisture in the soldering flux when the tin wire is melted at a high temperature; tin beads generated by splashing on a product and a product bonding pad are greatly reduced, the yield is improved, and the quality control effect is excellent.

Description

Technical Field

[0001] The invention relates to the technical field of automatic soldering, and in particular to a tin wire feeder nozzle with a heating device. Background Art

[0002] Existing automated soldering equipment is equipped with a precisely mobile and positioned mechanical arm or conveying device, which can synchronize the soldering iron tip and the tin wire feeding nozzle to the soldering point, so that the soldering iron tip heats the tin wire, forms a solder joint at the soldering point, and completes the soldering. As is known to all, auxiliary addition of flux such as rosin during the soldering process can effectively improve the quality of the solder joint. Since automated soldering equipment uses a tin wire feeding nozzle, it mostly uses rosin core tin wire coated with rosin inside, so as to achieve synchronous feeding of the tin wire and rosin through the tin wire feeding nozzle.

[0003] However, fluxes such as rosin inevitably contain a certain amount of water. When the rosin core tin wire is melted by the soldering iron tip, the water contained in the rosin boils rapidly to produce cavitation, causing part of the melted tin to splash irregularly, forming tin beads that are detached from the solder joint. The tin beads may splash and adhere to the surface of materials such as the feed nozzle, soldering iron tip or product pad, which not only affects the operation of the automated soldering equipment, but may also cause product short circuit or damage, reducing the yield rate and being unfavorable for production quality control. Summary of the invention

[0004] The invention discloses a tin wire feeder nozzle provided with a heating device.

[0005] A hollow catheter 1 and a needle nozzle 2;

[0006] One end of the conduit 1 is a feed end 11 for receiving the tin wire S, and the conduit 1 guides and transports the tin wire S;

[0007] The other end of the conduit 1 is a discharge end 12 with external threads;

[0008] The end of the needle nozzle 2 is screwed and assembled on the discharge end 12 of the catheter 1;

[0009] The tip of the needle nozzle 2 outputs the tin wire S;

[0010] The outer wall surface of the conduit 1 surrounds and covers the heating mechanism 3 .

[0011] As an optional implementation, the axis of the tin wire S is hollow and filled with flux.

[0012] As an optional implementation, the heating mechanism 3 is used to heat and evaporate water contained in the soldering flux.

[0013] As an optional implementation, at the same tin wire S conveying speed, the axial covering length of the heating mechanism 3 of the conduit 1 is negatively correlated with its heating temperature.

[0014] As an optional implementation, the heating temperature of the heating mechanism 3 is adjusted based on the composition and water content of the soldering flux.

[0015] As an optional implementation, the heating temperature of the heating mechanism 3 is lower than the melting point of the tin wire S and higher than the boiling point of water.

[0016] As an optional embodiment, the catheter 1 is clamped and assembled on a rotating sleeve T, and the rotating sleeve T is rotatably mounted on the side of the inclined frame X;

[0017] The blowing mechanism C is rotatably mounted on the inclined frame X, and the inclined frame X is fixedly assembled on the main frame A.

[0018] As an optional implementation, a soldering iron tip L is mounted below the main support A.

[0019] As an optional embodiment, the inclined frame X and the rotating sleeve T are used to adjust the needle nozzle 2 to align with the soldering iron tip L to supply tin to the soldering iron tip L;

[0020] The air blowing mechanism C is aligned with the soldering iron tip L and the needle nozzle 2 to clean the soldering iron tip L and the needle nozzle 2 by blowing gas.

[0021] As an optional implementation, the feeding mechanism delivers the tin wire S to the needle nozzle 2 through the conduit 1 , and the tin wire S touches the soldering iron tip L and melts and drips, thereby soldering the contact point directly below the soldering iron tip L.

[0022] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0023] A heating mechanism is set at the conduit for conveying the tin wire to preheat the tin wire, so that the moisture contained in the flux inside the tin wire evaporates first and dissipates when the tin wire is discharged from the needle nozzle, thereby avoiding the splashing of tin beads due to the vaporization of moisture inside the flux when the tin wire melts at high temperature, greatly reducing the tin beads generated by splashing on the product and the product pad, improving the yield rate and achieving excellent quality control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a tin wire feeder nozzle with a heating device disclosed in the present invention;

[0026] Figure 2 It is a structural schematic diagram of the side surface of a tin wire feeder nozzle with a heating device disclosed in the present invention;

[0027] Figure 3 The present invention discloses a schematic cross-sectional structure diagram of a portion of a nozzle of a tin wire feeder equipped with a heating device.

[0028] The main structural symbols are described in the following table:

[0029] catheter 1 Feed end 11 Discharge end 12 Needle Mouth 2 Tin Wire S Heating mechanism 3 Main bracket A Soldering Iron Tip L Slant rack X Rotating sleeve T Blowing mechanism C DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 3 The tin wire feeder nozzle with a heating device may include the following contents.

[0032] A hollow catheter 1 and a needle nozzle 2;

[0033] One end of the conduit 1 is a feed end 11 for receiving the tin wire S, and the conduit 1 guides and transports the tin wire S;

[0034] The other end of the conduit 1 is a discharge end 12 with external threads;

[0035] The end of the needle nozzle 2 is screwed and assembled on the discharge end 12 of the catheter 1;

[0036] The tip of the needle nozzle 2 outputs the tin wire S;

[0037] The outer wall surface of the conduit 1 surrounds and covers the heating mechanism 3 .

[0038] As an optional implementation, the axis of the tin wire S is hollow and filled with flux.

[0039] Here, the conventional catheter only serves to fix the needle nozzle and assist in positioning the needle nozzle, so that the tin wire and the flux inside it are directly transported to the soldering iron tip in the initial state for soldering. At this time, taking the commonly used flux rosin as an example, it contains a certain amount of water. When the stable liquid water in the rosin touches the soldering iron tip at a temperature that can melt the tin wire, it will rapidly vaporize into water vapor, generating a cavity with a rapidly expanding volume inside the melted tin wire, and causing irregular splashing of tin beads during the overflow and rupture process.

[0040] In the automated soldering process, the product surface is usually not masked. In this case, the flying tin beads may adhere to the needle nozzle and soldering iron tip as well as the product surface. If there are contacts or circuit components at the adhesion point, the tin beads will cause the product to short-circuit, resulting in many unpredictable quality control problems and a decrease in the yield rate.

[0041] Therefore, this solution sets a heating mechanism for the catheter, which allows the moisture contained in the flux inside the tin wire to evaporate first through preheating, and dissipate when the tin wire is discharged from the needle nozzle, thereby preventing the tin wire from splashing out tin beads due to the internal water vapor when it melts, greatly improving the cleanliness of the equipment and products, increasing the yield rate, and achieving excellent quality control effects.

[0042] As an optional implementation, the heating mechanism 3 is used to heat and evaporate the water contained in the soldering flux.

[0043] As an optional implementation, at the same tin wire S conveying speed, the axial covering length of the heating mechanism 3 in the conduit 1 is negatively correlated with its heating temperature.

[0044] As an optional implementation, the heating temperature of the heating mechanism 3 is adjusted based on the composition and water content of the soldering flux.

[0045] Here, the covering length of the heating mechanism is flexibly adjusted according to the actual conditions such as the conveying speed of the tin wire, the composition and water content of the flux, the heating temperature of the heating mechanism, the thermal conductivity efficiency of the conduit, etc., to ensure that the main body of the tin wire does not melt, and at the same time the moisture of the flux inside the tin wire is vaporized, so that it can be discharged from the needle mouth, and will not vaporize rapidly at the soldering iron tip, and will not produce cavitation inside the melted tin wire.

[0046] As an optional implementation, the heating temperature of the heating mechanism 3 is lower than the melting point of the tin wire S and higher than the boiling point of water.

[0047] Here, the heating temperature of the heating mechanism is between the boiling point of water and the melting point of the tin wire, so as to obtain a good water removal effect, while ensuring that the main body of the tin wire does not deform and can be discharged smoothly.

[0048] As an optional embodiment, the catheter 1 is clamped and assembled on the rotating sleeve T, and the rotating sleeve T is rotatably mounted on the side of the inclined frame X;

[0049] The blowing mechanism C is rotatably mounted on the inclined frame X, and the inclined frame X is fixedly assembled on the main frame A.

[0050] As an optional implementation, a soldering iron tip L is mounted below the main support A.

[0051] As an optional embodiment, the inclined frame X and the rotating sleeve T are used to adjust the needle nozzle 2 to align with the soldering iron tip L to supply tin to the soldering iron tip L;

[0052] The air blowing mechanism C is aimed at the soldering iron tip L and the needle nozzle 2 to clean the soldering iron tip L and the needle nozzle 2 by blowing gas.

[0053] Here, the soldering iron tip is used to locate the working point. When the product is transported under the soldering iron tip, the soldering iron tip is facing the area that needs to be soldered.

[0054] Through the inclined bracket and rotating sleeve, the needle nozzle is aligned with the soldering iron tip so that the solder wire can touch the soldering iron tip after being output, thus achieving solder supply.

[0055] Furthermore, after multiple operations, excess tin will inevitably adhere to the soldering iron tip and the needle nozzle. At this time, the blowing mechanism sprays high-pressure gas to both to blow away the excess tin to ensure smooth operation of the equipment.

[0056] As an optional implementation, the feeding mechanism delivers the tin wire S to the needle nozzle 2 through the conduit 1 , and the tin wire S touches the soldering iron tip L and melts and drips, thereby soldering the contact point directly below the soldering iron tip L.

[0057] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0058] A heating mechanism is set at the conduit for conveying the tin wire to preheat the tin wire, so that the moisture contained in the flux inside the tin wire evaporates first and dissipates when the tin wire is discharged from the needle nozzle, thereby avoiding the splashing of tin beads due to the vaporization of moisture inside the flux when the tin wire melts at high temperature, greatly reducing the tin beads generated by splashing on the product and the product pad, improving the yield rate and achieving excellent quality control effect.

Claims

1. A tin wire feeder nozzle with a heating device, characterized in that: include: A hollow catheter (1) and a needle nozzle (2); One end of the conduit (1) is a feed end (11) for receiving the tin wire (S), and the conduit (1) guides and transports the tin wire (S); The other end of the conduit (1) is a discharge end (12) having an external thread; The end of the needle nozzle (2) is screwed and assembled on the discharge end (12) of the catheter (1); The tip of the needle nozzle (2) outputs the tin wire (S); The outer wall surface of the conduit (1) surrounds and covers the heating mechanism (3).

2. A tin wire feeder nozzle with a heating device according to claim 1, characterized in that: include: The axial center of the tin wire (S) is hollow and filled with soldering flux.

3. A tin wire feeder nozzle with a heating device according to claim 2, characterized in that: include: The heating mechanism (3) is used to heat and evaporate the water contained in the soldering flux.

4. A tin wire feeder nozzle with a heating device according to claim 3, characterized in that: include: At the same tin wire (S) conveying speed, the axial covering length of the heating mechanism (3) in the catheter (1) is negatively correlated with its heating temperature.

5. A tin wire feeder nozzle with a heating device according to claim 4, characterized in that: include: The heating temperature of the heating mechanism (3) is adjusted based on the composition and water content of the soldering flux.

6. A tin wire feeder nozzle with a heating device according to claim 5, characterized in that: include: The heating temperature of the heating mechanism (3) is lower than the melting point of the tin wire (S) and higher than the boiling point of water.

7. A tin wire feeder nozzle with a heating device according to claim 1, characterized in that: include: The conduit (1) is clamped and assembled on a rotating sleeve (T), and the rotating sleeve (T) is rotatably mounted on the side of the inclined frame (X); The blowing mechanism (C) is rotatably mounted on the inclined frame (X), and the inclined frame (X) is fixedly assembled on the main frame (A).

8. A tin wire feeder nozzle with a heating device according to claim 7, characterized in that: include: A soldering iron head (L) is mounted below the main support (A).

9. A tin wire feeder nozzle with a heating device according to claim 8, characterized in that: include: The inclined frame (X) and the rotating sleeve (T) are used to adjust the needle nozzle (2) to align with the soldering iron head (L) so as to supply tin to the soldering iron head (L); The air blowing mechanism (C) is aimed at the soldering iron tip (L) and the needle nozzle (2) so as to clean the soldering iron tip (L) and the needle nozzle (2) by blowing gas.

10. A tin wire feeder nozzle with a heating device according to claim 9, characterized in that: include: The feeding mechanism delivers the tin wire (S) to the needle nozzle (2) through the conduit (1); the tin wire (S) touches the soldering iron head (L) and melts and drips, thereby soldering the contact point directly below the soldering iron head (L).

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