Device for lubricating a nozzle and method for preventing oxidation of a tin spraying nozzle

Abstract

The application discloses a lubricating nozzle device, which comprises a flux providing device, a lubricating nozzle sleeve and a linear driver, wherein the lubricating nozzle sleeve is provided with an inner cavity; the flux providing device is communicated with the inner cavity and can inject flux into the inner cavity; and the linear driver can drive the lubricating nozzle sleeve to move linearly so that the lubricating nozzle sleeve moves linearly. The lubricating nozzle device can uniformly apply flux to a tin spraying nozzle, prevent the tin spraying nozzle from being oxidized, and realize automatic lubrication of the tin spraying nozzle in a welding state. The application further discloses a tin spraying nozzle oxidation prevention treatment method.

Description

TECHNICAL FIELD

[0001] The present application relates to a soldering nozzle maintenance device, in particular to a nozzle lubricating device and a soldering nozzle anti-oxidation treatment method. BACKGROUND

[0002] Selective wave soldering is a technology applied in the field of PCB plug-in hole welding. Due to its different welding advantages, it gradually becomes the trend of hole welding. The soldering nozzle of the selective wave soldering equipment is in long-term contact with high-temperature liquid solder, and the soldering nozzle will be oxidized to form an oxide layer. This oxide layer will reduce the fluidity of the liquid solder and affect the welding. Therefore, during the selective wave soldering process, the soldering nozzle needs to be regularly treated for anti-oxidation.

[0003] There are generally two ways to prevent the oxidation of the existing soldering nozzle. One is to manually apply flux to the soldering nozzle, and the other is to use an automatic device to automatically apply flux to the soldering nozzle. However, for the first method, since manual application is required, it needs to be stopped (the selective wave soldering equipment stops running), which not only reduces production efficiency, but also makes the high-temperature liquid solder remaining in the soldering nozzle easy to scald the hand, which is not safe to operate. For the second method, for example, the patent application with application number 201810483959.3, although it is an automatic application method, the brush moves back and forth to apply flux to the soldering nozzle, which causes the soldering nozzle to have a large amount of flux accumulated in some places and no or only a small amount of flux in some places, resulting in uneven application and poor anti-oxidation effect. In addition, in order to ensure that the flux can be applied to the soldering nozzle, the flux needs to flow out of each part of the brush, so the flux supply device needs to continuously supply flux to each part of the brush during application, and the flux that does not reach the soldering nozzle will directly fall, resulting in a large amount of waste. SUMMARY

[0004] The purpose of the present application is to provide a nozzle lubricating device that uniformly applies flux to the soldering nozzle and prevents the soldering nozzle from oxidizing.

[0005] Another purpose of the present application is to provide a soldering nozzle anti-oxidation treatment method that uniformly applies flux to the soldering nozzle and prevents the soldering nozzle from oxidizing.

[0006] In order to achieve the above-mentioned purposes, the nozzle lubricating device provided by the present application comprises a flux providing device, a nozzle lubricating sleeve and a linear actuator. The nozzle lubricating sleeve is provided with an inner cavity. The flux providing device is in communication with the inner cavity and can inject flux into the inner cavity. The linear actuator can drive the nozzle lubricating sleeve to move linearly, so that the nozzle lubricating sleeve moves linearly.

[0007] Compared with the prior art, the application sets a moistening sleeve, sets an inner cavity for the tin nozzle to extend into in the moistening sleeve, and supplies flux to the inner cavity through a flux supplying device, and then the flux stays in the inner cavity. Meanwhile, the moistening sleeve is driven to move linearly by the linear driver, and the flux is applied to the tin nozzle when the tin nozzle extends into the inner cavity. Since the moistening sleeve is annular, the flux is evenly distributed on the tin nozzle, which can remove the oxide layer on the tin nozzle and prevent the tin nozzle from being further oxidized, ensuring the liquidity of the liquid tin at the tin nozzle and improving the welding quality.

[0008] Preferably, the moistening sleeve is arranged on the first support, and the output end of the linear driver is connected with the first support and can drive the first support to move linearly.

[0009] Specifically, the application further comprises a rotary driving device, the moistening sleeve is connected with the output end of the rotary driving device, and the rotary driving device is arranged on the first support and can drive the moistening sleeve to rotate. The rotary driving device drives the moistening sleeve to rotate, and then drives the flux to move, so that the flux is evenly distributed on the tin nozzle, which is beneficial to remove the oxide layer on the tin nozzle.

[0010] Preferably, the side wall of the moistening sleeve is annular and closed. In this way, the flux can stay in the inner cavity, and an appropriate amount of flux can be effectively applied to the tin nozzle. Moreover, the flux can be prevented from leaking out when the moistening sleeve rotates, and the flux is effectively saved.

[0011] Specifically, the linear driver is a cylinder.

[0012] Specifically, a pipeline is arranged between the flux supplying device and the moistening sleeve, and the pipeline communicates with the flux supplying device and the moistening sleeve.

[0013] Specifically, an extrusion head is arranged at the end of the pipeline close to the moistening sleeve, the extrusion head is slidably arranged in the inner cavity, and the side wall of the extrusion head is provided with an extrusion hole communicating with the pipeline, and the extrusion hole faces the wall of the inner cavity. The extrusion head and the extrusion hole are arranged, so that the extruded flux can adhere to the wall of the inner cavity, and the flux cannot directly fall from the lower opening of the moistening sleeve.

[0014] Preferably, the flux providing device comprises a container for storing the paste-like flux, and a gas pressure device, the outlet of the container is communicated with the inner cavity, and the gas pressure device is connected with the inlet of the container to press the flux into the inner cavity. Since the flux is in paste-like form and has poor fluidity, the flux cannot naturally flow from the container into the inner cavity, and therefore the high-pressure gas of the gas pressure device is used to press the flux into the inner cavity, which can ensure that the flux can smoothly reach the inner cavity, and by controlling the size of the gas pressure and the time of pressure retention, the extrusion amount of the flux can be controlled, so that the amount of flux applied each time is appropriate, and the flux is effectively saved. In addition, the flux has strong viscosity and is not easy to lose when applied to the tin spraying nozzle, and the anti-oxidation effect is better.

[0015] Preferably, a second support is further included, the first support is slidingly arranged in the second support, and the flux providing device and the linear driver are arranged on the second support.

[0016] Specifically, one of the first support and the second support is provided with a guide column, and the other is provided with a guide sleeve slidingly sleeved with the guide column. By using the guide column and the guide sleeve, the movement of the first support can be more accurate and stable, so that the nozzle lubricating sleeve can be accurately sleeved with the tin spraying nozzle.

[0017] Preferably, the nozzle lubricating sleeve is rotatably arranged in the first support, and a transmission mechanism is arranged between the output end of the rotary driving device and the nozzle lubricating sleeve.

[0018] Specifically, the transmission mechanism comprises a first gear and a second gear meshing with the first gear, the first gear is connected with the output end of the rotary driving device, and the second gear is connected with the nozzle lubricating sleeve.

[0019] Preferably, the rotary driving device is an electric motor.

[0020] Preferably, the output end of the linear driver is connected with the flux providing device, and the nozzle lubricating sleeve is connected with the output end of the flux providing device. In this way, the structure can be simplified, the convenience of use can be improved, and the production cost can be reduced.

[0021] Specifically, the central axes of the linear driver, the flux providing device and the nozzle lubricating sleeve are coaxial.

[0022] Specifically, the output end of the flux providing device has a connecting sleeve, the connecting sleeve has a receiving cavity, the nozzle lubricating sleeve is arranged in the receiving cavity, and the side wall of the nozzle lubricating sleeve is provided with a through hole communicated with the receiving cavity and the inner cavity, respectively.

[0023] A method for preventing oxidation of a soldering nozzle, comprising the steps of: delivering flux into a nozzle wetting sleeve by a flux providing device; driving the nozzle wetting sleeve to gap-fit over the soldering nozzle by a linear actuator; rotating the nozzle wetting sleeve by a rotary actuator to coat the soldering nozzle with the flux; and driving the nozzle wetting sleeve away from the soldering nozzle by the linear actuator.

[0024] Preferably, the method further comprises the step of moving the soldering nozzle under the nozzle wetting sleeve before the first step.

[0025] Preferably, the flux providing device pressurizes the flux into the nozzle wetting sleeve by high pressure.

[0026] Preferably, the gap between the nozzle wetting sleeve and the soldering nozzle is in the range of 0.6mm to 1mm. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Fig. 1 is a structural diagram of a nozzle wetting device according to an embodiment of the present application.

[0028] Figure 2 Fig. 2 is a sectional view of the nozzle wetting device according to the embodiment of the present application.

[0029] Figure 3 Fig. 3 is a structural diagram of the inside of a nozzle wetting sleeve of the nozzle wetting device according to the embodiment of the present application.

[0030] Figure 4 Fig. 4 is a diagram of the nozzle wetting sleeve of the nozzle wetting device according to the embodiment of the present application fitted over a soldering nozzle.

[0031] Figure 5 Fig. 5 is a flow chart of a method for preventing oxidation of a soldering nozzle according to the embodiment of the present application.

[0032] Figure 6 Fig. 6 is a structural diagram of a nozzle wetting device according to another embodiment of the present application.

[0033] Figure 7 Fig. 7 is a sectional view of the nozzle wetting device according to the embodiment of the present application. DETAILED DESCRIPTION

[0034] To describe the technical contents, structural features and effects of the present application in detail, the following embodiments are described in conjunction with the accompanying drawings.

[0035] As Figures 1 to 3As shown in the figure, the structure of a first embodiment of the lubrication nozzle device 100 of the present invention is illustrated. The lubrication nozzle device 100 of the present invention includes a first support 1, a second support 2, a flux supply device 3, a rotary drive device 4, a linear actuator 5, a lubrication nozzle sleeve 6, and a control system. The control system is electrically connected to the flux supply device 3, the rotary drive device 4, and the linear actuator 5 to control the start / stop of the latter three. The first support 1 is slidably disposed on the second support 2, and the first support 1 is located below the second support 2. The flux supply device 3 and the linear actuator 5 are disposed on the second support 2. The flux supply device 3 is located on the upper surface of the second support 2, and the linear actuator 5 is located on the bottom surface of the second support 2 with its output end extending downwards. The output end of the linear actuator 5 is connected to a connecting block 51 fixed to the surface of the first support 1 and can drive the first support 1 to move linearly, that is, move up and down relative to the second support 2. The linear actuator 5 is a cylinder. The lubrication nozzle sleeve 6 is located on the bottom surface of the first support 1 and is rotatably disposed on the first support 1 around its own central axis. The nozzle sleeve 6 has an inner cavity 61 into which the solder spray nozzle 200 can extend. When the solder spray nozzle 200 extends into the inner cavity 61, the wall of the inner cavity 61 is spaced apart from the solder spray nozzle 200. The flux supply device 3 communicates with the inner cavity 61 and can inject flux into the inner cavity 61. The nozzle sleeve 6 is connected to the output end of the rotary drive device 4. Specifically, the rotary drive device 4 is disposed on the upper surface of the first bracket 1. The rotary drive device 4 is a motor. The output end of the rotary drive device 4 extends downward from the bottom surface of the first bracket 1 and is provided with a transmission mechanism 7 between it and the nozzle sleeve 6. The rotary drive device 4 transmits torque to the nozzle sleeve 6 through the transmission mechanism 7, driving the nozzle sleeve 6 to rotate, thereby causing the flux in the nozzle sleeve 6 to be applied to the nozzle.

[0036] For example Figure 1 As shown, specifically, the transmission mechanism 7 includes a first gear 71 and a second gear 72 meshing with the first gear 71. The first gear 71 is connected to the output end of the rotary drive device 4, and the second gear 72 is connected to the nozzle sleeve 6.

[0037] For example Figure 2 As shown, the sidewall of the lubricating sleeve 6 has a ring-shaped closed structure. This allows the flux to remain in the inner cavity 61, ensuring that an appropriate amount of flux is effectively applied to the solder nozzle 200. Furthermore, it prevents flux leakage when the lubricating sleeve 6 rotates, effectively conserving flux.

[0038] Please see again Figure 2 and Figure 3The flux providing device 3 is connected with the nozzle moistening sleeve 6 through a pipeline 8. The pipeline 8 is fixedly connected with the second support 2, and the end of the pipeline 8 close to the nozzle moistening sleeve 6 is provided with an extrusion head 9 which is slidably arranged in the inner cavity 61 and provided with an extrusion hole 91 which is connected with the pipeline 8 and faces the wall of the inner cavity 61. The extrusion head 9 and the extrusion hole 91 are arranged to make the extruded flux adhere to the wall of the inner cavity 61, so that the flux cannot directly drop from the lower opening of the nozzle moistening sleeve 6.

[0039] Please refer to Figure 2 The flux providing device 3 comprises a container 31 for storing paste-like flux and a gas pressure device. The outlet of the container 31 is connected with the inner cavity 61, and the gas pressure device is connected with the inlet of the container 31 to press the flux into the inner cavity 61 through the pipeline 8. Since the flux is in paste form and has poor fluidity, the flux cannot naturally flow from the container 31 into the inner cavity 61. Therefore, the high-pressure gas of the gas pressure device is used to press the flux into the inner cavity 61, so that the flux can smoothly reach the inner cavity 61, and the amount of extruded flux can be controlled by controlling the gas pressure and the pressure maintaining time, so that the amount of flux applied each time is appropriate, and the flux is effectively saved. In addition, the flux has strong viscosity and is not easy to lose when applied to the soldering nozzle 200, so that the anti-oxidation effect is better.

[0040] Please refer to Figure 2 One of the first support 1 and the second support 2 is provided with a guide column 11, and the other is provided with a guide sleeve 21 which is slidably sleeved with the guide column 11. In this embodiment, the guide column 11 is arranged on the first support 1, and the guide sleeve 21 is fixedly arranged on the second support 2. The guide column 11 and the guide sleeve 21 can make the first support 1 move more accurately and stably, so that the nozzle moistening sleeve 6 can be accurately sleeved with the soldering nozzle 200.

[0041] As shown in Figure 5 The anti-oxidation treatment method of the soldering nozzle 200 comprises the following steps:

[0042] Step S1, the soldering nozzle 200 is driven to move below the nozzle moistening sleeve 6.

[0043] Step S2, the flux providing device 3 is used to deliver flux into the nozzle moistening sleeve 6. Specifically, the flux providing device 3 is used to press the flux into the nozzle moistening sleeve 6 through high pressure.

[0044] Step S3, using the linear driver 5 to drive the nozzle lubricating sleeve 6 to be gaply sleeved on the outside of the soldering nozzle 200; the gap between the nozzle lubricating sleeve 6 and the soldering nozzle 200 is 0.6mm to 1mm.

[0045] Step S4, using the rotary driving device 4 to drive the nozzle lubricating sleeve 6 to rotate, so that the flux is coated on the soldering nozzle 200;

[0046] Step S5, using the linear driver 5 to drive the nozzle lubricating sleeve 6 to be separated from the soldering nozzle 200.

[0047] In combination with the above and Figure 2 and Figure 4 , the working principle of the nozzle lubricating device 100 of the present application is described in detail as follows:

[0048] When the soldering nozzle 200 needs to be treated for oxidation prevention, first, the soldering nozzle 200 is moved to be directly below the nozzle lubricating device, and then the control system controls the air pressure device to pressurize the container 31, so that the flux in the container 31 is pressed out to the pipeline 8 by air pressure, the flux reaches the extrusion head 9 along the pipeline 8, and is sprayed from the extrusion hole 91, so that the flux adheres to the side wall of the inner cavity 61. Then, the control system controls the linear driver 5 to start, so that the linear driver 5 pushes the first support 1 to move downward, the first support 1 drives the nozzle lubricating sleeve 6 to move downward and sleeve the soldering nozzle 200, then the control system controls the rotary driving device 4 to rotate, and drives the nozzle lubricating sleeve 6 to rotate through the transmission mechanism 7, so that the flux in the inner cavity 61 is coated on the periphery of the soldering nozzle 200. Finally, after the rotary driving device 4 is controlled to stop, the first support 1 is moved upward by using the linear driver 5, so that the nozzle lubricating sleeve 6 is separated from the soldering nozzle 200, and the oxidation prevention treatment is completed.

[0049] Compared with the prior art, the application sets the moistening nozzle sleeve 6, sets the inner cavity 61 for the tin spraying nozzle 200 to extend into in the moistening nozzle sleeve 6, and supplies the flux to the inner cavity 61 through the flux supplying device 3, and then the flux stays in the inner cavity 61. When the linear driver 5 drives the inner cavity 61 to move downward, the tin spraying nozzle 200 extends into the inner cavity 61, and the flux can be applied to the tin spraying nozzle 200, at the same time, the moistening nozzle sleeve 6 is driven to rotate through the rotary driving device 4, and then the flux can be moved to uniformly distribute on the tin spraying nozzle 200, so that the oxidation layer on the tin spraying nozzle 200 can be removed, and the tin spraying nozzle 200 can be prevented from further oxidation, the liquidity of the liquid tin at the tin spraying nozzle 200 is ensured, and the welding quality is improved. The whole moistening nozzle device 100 controls the movement, the flux filling and the rotary application of the moistening nozzle sleeve 6 through the control system, realizes the automatic moistening nozzle of the tin spraying nozzle 200 in the welding state, and therefore, the tin spraying nozzle 200 can be driven to move to the moistening nozzle sleeve 6 for the automatic anti-oxidation treatment in the time period between two welding time points, the welding equipment is prevented from being in the shutdown state, and the production efficiency is improved.

[0050] As shown in Figures 6 to 7 The moistening nozzle device 300 includes the flux supplying device 302, the moistening nozzle sleeve 303 and the linear driver 301. The flux supplying device 302 also includes the container for storing the paste-like flux and the air pressure device, and the structure is the same as that of the first embodiment. The moistening nozzle sleeve 303 is provided with the inner cavity 303a. The output end of the linear driver 301 is connected with the flux supplying device 302, and the moistening nozzle sleeve 303 is connected with the output end of the flux supplying device 302. The flux supplying device 302 communicates with the inner cavity 303a and can inject the flux into the inner cavity 303a; the central axes of the linear driver 301, the flux supplying device 302 and the moistening nozzle sleeve 303 are coaxial, and this structure can simplify the structure of the moistening nozzle device 300, improve the convenience of use, and reduce the production cost. Specifically, the output end of the flux supplying device 302 has the connecting sleeve 304, the connecting sleeve 304 has the accommodating cavity 304a, the moistening nozzle sleeve 303 is built in the accommodating cavity 304a, and the side wall of the moistening nozzle sleeve 303 is provided with the plurality of through holes in array, and the through holes respectively communicate with the accommodating cavity 304a and the inner cavity 303a.

[0051] When the soldering nozzle needs to be prevented from oxidation, the soldering nozzle 200 is first moved to be directly below the lubricating nozzle 303, and then the control system controls the air pressure device to pressurize the container, so that the flux in the container is pressed out to the connecting sleeve 304, and the flux reaches the lubricating nozzle sleeve 303 through the through hole and adheres to the side wall of the inner cavity 303a of the lubricating nozzle sleeve 303. Then, the control system controls the linear driver 301 to start, so that the linear driver 301 drives the flux providing device 302 to move downward, and the flux providing device 302 drives the lubricating nozzle sleeve 303 to move downward to cover the soldering nozzle 200, at this time, the lubricating nozzle sleeve 303 spreads the flux in the inner cavity 303a to the periphery of the soldering nozzle 200. Finally, the linear driver 301 is controlled to drive the flux providing device 302 and the lubricating nozzle sleeve 303 to move upward, so that the lubricating nozzle sleeve 303 is separated from the soldering nozzle 200, and the anti-oxidation treatment is completed. The effect of the lubricating nozzle device 300 of the embodiment is basically the same as that of the first embodiment, and will not be described again here.

[0052] The above only discloses preferred examples of the present application, and of course cannot limit the scope of the patent rights of the present application, so equivalent changes made in the patent application scope of the present application still belong to the scope covered by the present application.

Claims

1. A nozzle lubrication device, characterized in that: The device includes a flux supply device, a nozzle sleeve, and a linear actuator. The nozzle sleeve has an inner cavity into which a solder nozzle extends. The flux supply device communicates with the inner cavity and can inject flux into the inner cavity. The linear actuator can drive the nozzle sleeve to move linearly. The nozzle sleeve also includes a rotary drive device. The nozzle sleeve is connected to the output end of the rotary drive device, and the rotary drive device drives the nozzle sleeve to rotate. A transmission mechanism is provided between the output end of the rotary drive device and the nozzle sleeve.

2. The nozzle lubrication device as described in claim 1, characterized in that: It also includes a first bracket, the nozzle sleeve is disposed on the first bracket, and the output end of the linear driver is connected to the first bracket and can drive the first bracket to move linearly.

3. The nozzle lubrication device as described in claim 2, characterized in that: The rotation drive device is mounted on the first support.

4. The nozzle lubrication device as described in claim 1, characterized in that: The sidewall of the mouth moisturizer sleeve has a closed ring structure.

5. The nozzle lubrication device as described in claim 1, characterized in that: The linear actuator is a cylinder.

6. The nozzle lubrication device as claimed in claim 1, characterized in that: A conduit is provided connecting the flux supply device and the nozzle sleeve.

7. The nozzle lubrication device as described in claim 6, characterized in that: An extrusion head is provided at the end of the tubing near the nozzle sleeve. The extrusion head is slidably disposed in the inner cavity, and the side wall of the extrusion head is provided with an extrusion hole communicating with the tubing. The extrusion hole faces the wall of the inner cavity.

8. The nozzle lubrication device as claimed in claim 1, characterized in that: The flux supply device includes a container for storing paste-like flux and a pressure device. The outlet of the container is connected to the inner cavity, and the pressure device is connected to the inlet of the container to pressurize the flux into the inner cavity.

9. The nozzle lubrication device as described in claim 2, characterized in that: It also includes a second bracket, the first bracket being slidably disposed on the second bracket, and the flux supply device and linear actuator being disposed on the second bracket.

10. The nozzle lubrication device as claimed in claim 9, characterized in that: One of the first bracket and the second bracket is provided with a guide post, and the other is provided with a guide sleeve that is slidably fitted with the guide post.

11. The nozzle lubrication device as claimed in claim 3, characterized in that: The mouthpiece sleeve is rotatably mounted on the first bracket.

12. The nozzle lubrication device as claimed in claim 11, characterized in that: The transmission mechanism includes a first gear and a second gear meshing with the first gear. The first gear is connected to the output end of the rotary drive device, and the second gear is connected to the nozzle sleeve.

13. The nozzle lubrication device as claimed in claim 1, characterized in that: The rotary drive device is an electric motor.

14. A nozzle lubrication device, characterized in that: The device includes a flux supply device, a nozzle sleeve, and a linear actuator. The output end of the linear actuator is connected to the flux supply device, and the nozzle sleeve is connected to the output end of the flux supply device. The nozzle sleeve has an inner cavity into which the solder nozzle extends. The flux supply device communicates with the inner cavity and can inject flux into the inner cavity. The linear actuator can drive the nozzle sleeve to move linearly, so that the nozzle sleeve moves linearly.

15. The nozzle lubrication device as claimed in claim 14, characterized in that: The linear actuator, the flux supply device, and the lubricating sleeve are all coaxial.

16. The nozzle lubrication device as claimed in claim 14, characterized in that: The output end of the flux supply device has a connecting sleeve, the connecting sleeve has a receiving cavity, the nozzle sleeve is built into the receiving cavity, and the side wall of the nozzle sleeve is provided with a through hole, the through hole communicating with the receiving cavity and the inner cavity respectively.

17. A method for preventing oxidation of the solder nozzle using the lubrication nozzle device according to any one of claims 1 to 13, characterized in that, Includes the following steps: Flux is delivered into the nozzle sleeve using a flux supply device; the nozzle sleeve has an inner cavity into which the solder nozzle extends. A linear actuator is used to drive the nozzle sleeve to be intermittently fitted onto the outside of the solder spray nozzle; The nozzle sleeve is rotated by a rotary drive device, so that the flux is applied to the solder nozzle; The linear actuator is used to drive the nozzle sleeve to detach from the solder spray nozzle.

18. The anti-oxidation treatment method for solder nozzles as described in claim 17, characterized in that: The first step also includes a step of moving the solder nozzle under the nozzle cover.

19. The anti-oxidation treatment method for solder nozzles as described in claim 17, characterized in that: The flux supply device uses high air pressure to force flux into the nozzle sleeve.

20. The anti-oxidation treatment method for solder nozzles as described in claim 17, characterized in that: The gap between the lubricating sleeve and the soldering nozzle ranges from 0.6 mm to 1 mm.

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