Liquid pumping mechanism of soldering flux for soldering tin of relay

Abstract

The utility model discloses a liquid pumping mechanism of soldering flux for relay soldering tin, which comprises a supply container and a peristaltic pump, the supply container is used for containing the soldering flux, the peristaltic pump is connected with the supply container to pump the soldering flux into the supply container, the supply container comprises a containing groove and an overflow groove, the overflow groove surrounds the outer side of the containing groove, and the overflow groove is communicated with the containing groove. According to the soldering flux recovery device, the precise peristaltic pump is utilized to ensure that the height of the liquid level in the containing groove is always ensured, the liquid level does not fluctuate, redundant soldering flux can be recovered through the external overflow groove, and the attachment height of the soldering flux is ensured to be the same every time.

Description

Technical Field

[0001] The utility model belongs to the technical field of relay soldering equipment, and more specifically relates to a pumping mechanism for flux used for relay soldering. Background Art

[0002] Due to product process requirements, it is necessary to solder the sampling points of the moving and static pieces of the product to facilitate welding of the sampling points with the sampling lines or welding of the sampling points with the circuit boards in subsequent production to ensure that there will be no cold soldering, loose welding, short circuit of the circuit boards, etc.

[0003] Currently, manual soldering is used. Manual soldering may cause the following problems, which may lead to insufficient production and unstable quality:

[0004] 1. The soldering height is not enough, which will lead to cold soldering and weak soldering in the subsequent production of the circuit board;

[0005] 2. The solder height is too high, which will cause the circuit board to short-circuit during subsequent production;

[0006] 3. The soldering time is too long, which will cause the copper sheet to change color due to high temperature and the appearance will be poor;

[0007] 4. Since soldering is a high-temperature operation, there is a risk of high-temperature burns if the operator is not focused during work.

[0008] The applicant has invented an automatic soldering machine for relays, in which how to stably provide soldering flux is a technical problem to be solved. Utility Model Content

[0009] In view of the deficiencies of the prior art, the utility model provides a method of using a precise peristaltic pump to ensure that the liquid level in the receiving tank is always maintained without fluctuations, and excess flux can be recovered through an external overflow tank to ensure that the attachment height of the flux is the same each time.

[0010] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pumping mechanism for solder flux for relay solder, comprising a supply container and a peristaltic pump, wherein the supply container is used to contain the solder flux, the peristaltic pump is connected to the supply container to pump the solder flux into the supply container, the supply container comprises a containing tank and an overflow tank, the overflow tank surrounds the outside of the containing tank, and the containing tank is higher than the overflow tank, and the peristaltic pump is connected to the containing tank;

[0011] The height of the receiving tank is a, and the height of the overflow tank is b, satisfying the quantitative relationship: a>b;

[0012] An overflow notch is arranged above the open side wall of the overflow trough.

[0013] The invention further comprises a flux raw material barrel, and a peristaltic pump is connected to the flux raw material barrel.

[0014] Furthermore, the material of the supply container is PP.

[0015] Further, the peristaltic pump is connected to the bottom of the containing tank.

[0016] Furthermore, evenly spaced support legs are provided below the supply container.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1) The flux is pumped into the holding tank by a peristaltic pump to fill the holding tank. The precise peristaltic pump can always ensure the liquid level and there is no fluctuation. The excess flux can be recovered through the overflow tank outside. The supply container made of PP material can avoid corrosion of the flux.

[0019] 2) In specific use, by setting the slot height of the receiving slot to a and the slot height of the overflow slot to b, the quantitative relationship is satisfied: a>b; an overflow notch is provided above the open side wall of the overflow slot. When the manipulator places the structure to be soldered into the overflow slot, the flux will not overflow on a large scale, causing the solder in the overflow slot to suddenly and significantly lose, but will flow out from the overflow notch above the side wall, thus avoiding excessive fluctuations in the upper plane of the overflow slot liquid, which will affect the surface treatment of the structure to be soldered, thereby affecting the final product quality, and further ensuring the soldering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural diagram of an automatic soldering machine for relays;

[0021] Figure 2 The three-dimensional structure diagram of the automatic soldering machine without the transfer robot;

[0022] Figure 3 This is a three-dimensional structural diagram of the transfer robot;

[0023] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0024] Figure 5 The three-dimensional structural diagram of the feeding mechanism;

[0025] Figure 6 A three-dimensional structural diagram of a supply container;

[0026] Figure 7 is a side view of a supply container;

[0027] Figure 8 It is a three-dimensional structural diagram of the tin furnace mechanism;

[0028] Fig. 9 It is a side view of the tin furnace mechanism;

[0029] Fig.10 A three-dimensional structural diagram of the tin furnace mechanism when the exhaust hood is removed;

[0030] Fig.11 is a cross-sectional view of the tin bath;

[0031] Fig.12 A three-dimensional structural diagram of a cleaning sink;

[0032] Fig.13 It is a three-dimensional structural diagram of the cooling and drying device;

[0033] Fig.14 It is a cross-sectional view of the cooling and drying device;

[0034] Fig.15 for Figure 6 Enlarged view of B.

[0035] Figure numerals: 1, feeding mechanism; 11, safety grating; 12, fixing seat; 13, fixing fixture; 14, positioning hole; 15, lifting support rod; 2, pumping mechanism; 21, supply container; 211, containing tank; 212, overflow tank; 22, raw material barrel; 23, peristaltic pump; 3, tin furnace mechanism; 311, tin cup; 3111, first lifting cylinder; 312, tin tank; 3121, first heating rod; 3122, first temperature sensor; 321, scraper; 322, linear cylinder; 3221, second lifting cylinder; 33, waste residue tank; 34, Exhaust hood; 35. Liquid level detection probe; 4. Water washing mechanism; 41. Cleaning sink; 42. Water cup; 421. Third lifting cylinder; 5. Cooling and drying device; 51. Wind knife; 511. Shaft; 52. Water collecting tank; 53. Support column; 6. Transfer robot; 61. Servo motor; 62. Y-axis linear module; 621. Linear guide; 622. Synchronous wheel; 623. Synchronous belt; 63. X-axis linear module; 64. Z-axis linear module; 65. Gripper; 66. Drive shaft; 7. Output conveyor belt; 8. Product; 9. Rack; 91. Workbench. DETAILED DESCRIPTION

[0036] Reference Figures 1 to 14 The embodiment of the pumping mechanism of the soldering flux for relay soldering of the utility model is further described.

[0037] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0039] An automatic soldering machine for a relay comprises a frame 9, on which are arranged:

[0040] A feeding mechanism 1, which includes a fixing fixture 13 for positioning the product 8;

[0041] The pump mechanism 2 includes a supply container 21 and a peristaltic pump 23. The supply container 21 is used to contain soldering flux. The peristaltic pump 23 is connected to the supply container 21 to pump the soldering flux into the supply container 21.

[0042] The tin furnace mechanism 3 includes a tin cup 311 and a tin tank 312. The tin cup 311 is located in the tin tank 312. The tin cup 311 is connected to a first lifting cylinder 3111. A liquid level detection probe 35 is arranged above the tin tank 312. The liquid level detection probe 35 is used to detect the height of the tin surface in the tin tank 312 so as to replenish the tin solution when it is insufficient.

[0043] A water washing mechanism 4, comprising a washing water tank 41;

[0044] A cooling and drying device 5, comprising an air knife 51, wherein the air knife 51 is connected to a blower;

[0045] The transfer robot 6 comprises a gantry, which is located above the frame 9. A three-axis moving module and a clamp 65 are arranged on the gantry, and the clamp 65 is installed on the three-axis moving module.

[0046] like Figure 2As shown, in this embodiment, a workbench 91 is arranged above the frame 9, and the feeding mechanism 1, the liquid pumping mechanism 2, the tin furnace mechanism 3, the water washing mechanism 4 and the cooling and drying device 5 are arranged in sequence on the workbench 91, and the moving range of the transfer robot 6 can cover the above mechanisms, that is, the transfer robot 6 can transfer the product 8 to any of the above mechanisms.

[0047] like Figure 5 As shown, in one embodiment, the feeding mechanism 1 further includes a safety grating 11 , which is arranged in front of the fixed fixture 13 .

[0048] The safety grating 11 can be fixed on the frame 9 or fixed to the main body of the feeding mechanism 1. It can prevent accidental intrusion and danger during the operation of the soldering machine, ensure the personal safety of the operator and avoid work-related injuries.

[0049] Preferably, a fixing seat 12 is disposed below the fixing fixture 13 , and the fixing fixture 13 is detachably connected to the fixing seat 12 .

[0050] In one embodiment, positioning holes 14 are provided on the fixing seat 12 and the fixing fixture 13, and positioning pins are inserted into the positioning holes 14. The fixing fixture 13 and the fixing seat 12 can be aligned and fixed by the positioning pins. After the positioning pins are pulled out, different fixing fixtures 13 can be replaced. That is, when processing different types of products 8, different fixing fixtures 13 can be replaced, so that multiple products 8 can be used universally.

[0051] And if Figure 5 As shown, a lifting support rod 15 is preferably provided below the fixing seat 12, which can adjust the height position of the fixing fixture 13 according to actual needs. The lifting support rod 15 can be a screw and a screw barrel matching structure.

[0052] In one embodiment, the supply container 21 includes a receiving groove 211 and an overflow groove 212 , wherein the overflow groove 212 surrounds the outside of the receiving groove 211 , and the receiving groove 211 is higher than the overflow groove 212 , and the peristaltic pump 23 is connected to the receiving groove 211 .

[0053] like Figure 7 As shown, the outer side of the supply container 21 is provided with a flux raw material barrel 22, and the flux raw material barrel 22 is connected to the receiving tank 211 through a peristaltic pump 23. The flux is pumped into the receiving tank 211 through the peristaltic pump 23 to fill the receiving tank 211. The precise peristaltic pump 23 can always ensure the liquid level height and there is no fluctuation in the liquid level. Excess flux can be recovered through the outside and the overflow tank 212.

[0054] like Figure 6 As shown, the supply container 21 is made of PP material as a whole to avoid corrosion by the flux.

[0055] like Fig.10 As shown, in one embodiment, the tin furnace mechanism 3 further includes a scraper 321 , the scraper 321 is connected to a linear drive assembly, and the scraper 321 is located above the tin cup 311 .

[0056] In this embodiment, the tin bath 312 is filled with tin solution. The action of the first lifting cylinder 3111 can make the tin cup 311 completely immersed in the tin bath 312 to hold the tin solution. The tin cup 311 scoops up the tin to ensure the uniform height during soldering and avoid scalding other parts.

[0057] The linear drive component may be a linear cylinder 322 or a linear motor. For example, the linear cylinder 322 may be a linear motor. Fig.10 As shown, the length direction of the entire tin bath 312 and the tin cup 311 extends along the X direction, and the linear cylinder 322 is arranged along the X direction, which drives the scraper 321 to reciprocate and can scrape off the oxide layer on the surface of the tin cup 311.

[0058] like Fig.10 As shown, a waste slag groove 33 is preferably provided on the side of the tin groove 312 . At this time, the waste slag groove 33 is located at the end of the tin groove 312 in the X direction, and the oxide layer scraped off by the scraper 321 is transferred to the waste slag groove 33 .

[0059] like Figure 8-10 As shown, the linear drive assembly is preferably connected to a second lifting cylinder 3221.

[0060] The second lifting cylinder 3221 can be used to control and adjust the height of the linear cylinder 322 and the scraper 321 , thereby adjusting the thickness of the oxide layer in the tin cup 311 scraped off by the scraper 321 .

[0061] like Fig.11 As shown, preferably, a first heating rod 3121 and a first temperature sensor 3122 are disposed in the tin bath 312 .

[0062] The tin solution in the tin bath 312 is heated by the first heating rod 3121, and cooperates with the first temperature sensor 3122 to keep the tin solution in a certain temperature range. The shell of the tin bath 312 is preferably a hollow shell, which can effectively achieve the purpose of heat insulation.

[0063] like Figure 8 and 9 As shown, preferably, an exhaust hood 34 is provided above the tin bath 312 , and the exhaust hood 34 has negative pressure, which can extract harmful gases to avoid occupational diseases.

[0064] like Fig.12As shown, in one embodiment, the structure of the cleaning water tank 41 is basically the same as the tin tank 312, a water cup 42 is arranged inside, and the water cup 42 is connected to the third lifting cylinder 421, and a second heating rod and a second temperature sensor are arranged in the cleaning water tank 41.

[0065] Clean water is filled into the cleaning water tank 41, and the water cup 42 is lifted and lowered in the cleaning water tank 41 by the third lifting cylinder 421 to be filled with water. The product 8 enters the water cup 42 to clean chemical residues, and the cooperation of the second heating rod and the second temperature sensor can maintain the temperature of the clean water.

[0066] like Fig.13 and 14 As shown, in one embodiment, a water collecting trough 52 is arranged in front of the wind knife 51, and the water stains blown away by the wind knife 51 fall into the water collecting trough 52, wherein a support column 53 is arranged below the wind knife 51, and the wind knife 51 and the support column 53 are connected by an axis 511, and an axis hole and an opening through the axis hole and the outside are arranged on the support column 53, and a locking screw is arranged at the opening, and the axis 511 of the wind knife 51 can be fixed to the support column 53 by the locking screw, and then the angle of the wind knife 51 can be adjusted according to the different products 8 to control the angle of the blowing wind, wherein the wind adopts negative ion wind.

[0067] Preferably, there is an output conveyor belt 7 after the cooling and drying device 5, that is, the processed product 8 is placed on the output conveyor belt 7 and transferred to the next process.

[0068] like Figure 3 and 4 As shown, in one embodiment, the three-axis moving module includes a Z-axis linear module 64, an X-axis linear module 63 and a Y-axis linear module 62, wherein the Y-axis linear module 62 includes two Y-axis linear guides 621, the Y-axis linear guide 621 is fixed on the gantry, and a synchronous wheel 622 and a synchronous belt 623 are provided on the Y-axis linear guide 621, the X-axis linear module 63 is connected to the synchronous belt 623 and is slidably connected to the Y-axis linear guide 621, the synchronous wheels 622 on the two Y-axis linear guides 621 are linked through a transmission shaft 66, the Z-axis linear module 64 is connected to the X-axis linear module 63, and the clamp 65 is connected to the Z-axis linear module 64.

[0069] The gantry spans the entire workbench 91, and the synchronous belt 623 is stretched through the synchronous wheel 622, one of which is connected to the servo motor 61. When the servo motor 61 is in motion, the two synchronous belts 623 are moved simultaneously through the transmission shaft 66, thereby controlling the X-axis linear module 63 to move along the Y-axis linear guide 621. This avoids jitter, rail gnawing and other problems caused by the asynchronous response of the two servo motors 61 when working. Compared with linear bearings, the linear guide 621 has a higher load and runs more smoothly; the Z-axis linear module 64 can be moved along the X-direction through the X-axis linear module 63, and the Z-axis linear module 64 can drive the clamp 65 to move up and down in the Z direction, wherein the clamp 65 and the Z-axis linear module 64 are detachably connected, that is, different clamps 65 can be replaced according to different products 8.

[0070] The working process is as follows:

[0071] S1. First, replace the corresponding clamping jaws 65 and the fixing fixture 13 according to the model of the product 8, adjust the angle of the wind knife 51, and set the duration and height of the soldering of the product 8 by the manipulator in advance;

[0072] S2, placing the product 8 on the fixed fixture 13;

[0073] S3, using the transfer manipulator 6 to grab the product 8 on the fixed fixture 13 and move it to the pump mechanism 2, where the peristaltic pump 23 keeps the containing tank 211 full of flux with a stable liquid level, where the product 8 contacts and attaches to the flux, and the excess flux flows to the overflow tank 212 for storage;

[0074] S4, the transfer robot 6 transfers the product 8 to the tin furnace mechanism 3, where the tin cup 311 is filled with tin solution from the tin tank 312 and rises, and the scraper 321 scrapes off the oxide layer on the surface of the tin cup 311 under the drive of the linear cylinder 322, and the product 8 contacts the tin solution and solders here. By initially setting the action of the transfer robot 6, the time and height of soldering can be controlled to make all products 8 uniform, and the harmful gas generated in the process is extracted and processed by the exhaust hood 34 to keep the air on site clean;

[0075] S4, the transfer robot 6 transfers the product 8 to the water washing mechanism 4, where the water cup 42 scoops clean water from the washing tank 41 and rises up, and the product 8 contacts the clean water for washing to prevent residues from adhering to the product 8 and causing poor appearance of the product 8;

[0076] S5, the transfer robot 6 transfers the product 8 to the cooling and drying device 5, where the product 8 is in the water collection tank 52, and the negative ion wind blown by the wind knife 51 dries the water stains on the surface of the product 8 to prevent poor oxidation of the copper parts;

[0077] S6, the transfer robot 6 transfers the product 8 to the output conveyor belt 7 to enter the next process.

[0078] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A pumping mechanism for relay solder flux, characterized in that: It includes a supply container and a peristaltic pump. The supply container is used to contain soldering flux. The peristaltic pump is connected to the supply container to pump the soldering flux into the supply container. The supply container includes a receiving tank and an overflow tank. The overflow tank surrounds the outside of the receiving tank, and the receiving tank is higher than the overflow tank. The peristaltic pump is connected to the receiving tank. The height of the containing groove (211) is a, and the height of the overflow groove (212) is b, satisfying the quantitative relationship: a>b; An overflow notch (2121) is provided above the open side wall of the overflow groove (212).

2. The pumping mechanism for relay soldering flux according to claim 1, characterized in that: The invention also includes a flux raw material barrel, and a peristaltic pump is connected to the flux raw material barrel.

3. The pumping mechanism for relay soldering flux according to claim 2, characterized in that: The material of the supply container is PP.

4. The pumping mechanism for relay soldering flux according to claim 3, characterized in that: The peristaltic pump is connected to the bottom of the containing tank.

5. The pumping mechanism for relay soldering flux according to claim 1, characterized in that: Evenly spaced support legs (213) are provided below the supply container (21).

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