A soldering flux drying device for micro patch transformers

Abstract

This utility model relates to a flux drying device for miniature surface-mount transformers, including a drying box, a fixture clamping and positioning assembly, and a secondary positioning and pre-pressing assembly. The drying box has a hot air outlet at the top. The fixture clamping and positioning assembly includes a stand, a clamping mounting base, and cylinder grippers. The grippers of the cylinder grippers have fixture positioning pins on their grippers. The secondary positioning and pre-pressing assembly includes a positioning fixing base, a pre-pressing cylinder, a pre-pressing clearance cylinder, a pre-pressing distribution plate, and pre-pressing heads. This utility model uses the secondary pre-pressing and positioning assembly to press and position the transformer on the fixture, facilitating precise welding of subsequent solder joints and improving welding quality. Multiple pre-pressing heads distributed on the pre-pressing distribution plate can simultaneously pre-press and position multiple transformers, further improving efficiency. The secondary pressing and positioning uses cylinders as a power source, with fully automated control throughout the process.

Description

Technical Field

[0001] This utility model relates to a drying device, and more particularly to a flux drying device for a miniature surface mount transformer. Background Technology

[0002] Surface mount transformers are commonly used core components of integrated circuit power supplies. They mainly consist of a frame, coil, and pins. In the later stages of manufacturing, the coil and pins need to be soldered. Current soldering processes require dipping the solder joints of the pins and coil in flux. To improve efficiency, multiple transformers are typically mounted on a boss in a fixture. However, this design makes the transformers prone to displacement during transport, leading to poor solder joint quality during subsequent soldering and the transformers detaching from the fixture during hot air drying. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a flux drying device for miniature surface mount transformers.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a flux drying device for a miniature surface mount transformer, including a drying box, a fixture clamping and positioning assembly located above the drying box, and a secondary positioning pre-pressing assembly. The top of the drying box is provided with a hot air outlet. The fixture clamping and positioning assembly includes uprights located at both ends of the drying box, a clamping mounting seat set on the top of the uprights, and a cylinder jaw set on the clamping mounting seat. The clamping head of the cylinder jaw is provided with a fixture positioning pin. The secondary positioning pre-pressing assembly includes a positioning fixing seat, a pre-pressing cylinder set on the positioning fixing seat, a pre-pressing clearance cylinder set on the pre-pressing cylinder, a pre-pressing distribution plate set on the pre-pressing clearance cylinder, and a pre-pressing head set on the pre-pressing distribution plate. The pre-pressing head corresponds one-to-one with the transformer on the fixture. The extension and retraction direction of the pre-pressing cylinder is vertical, and the extension and retraction direction of the pre-pressing clearance cylinder is horizontal. The pre-pressing head has a pre-pressing position directly below the transformer and a clearance position below the fixture.

[0005] As a further aspect of this design, the pre-pressure head includes a pre-pressure bearing seat, a pre-pressure pin that slides up and down along the pre-pressure bearing seat, and a buffer spring connecting the pre-pressure pin and the bottom of the pre-pressure bearing seat, wherein the buffer spring applies an upward elastic force to the pre-pressure pin.

[0006] As a further improvement of this design, a pre-pressure stop plate is provided at the bottom of the pre-pressure distribution plate. The pre-pressure stop plate is located directly below the pre-pressure ejector pin. When the pre-pressure ejector pin is compressed to the end of the lower stroke, its bottom abuts against the top surface of the pre-pressure stop plate.

[0007] As a further step of this design, the pre-pressure stop plate is provided with a pre-pressure detection sensor that corresponds one-to-one with the pre-pressure ejector pin. The pre-pressure detection sensor is used to detect whether the pre-pressure ejector pin is pre-pressed in place.

[0008] As a further step in this design, the top of the support frame is provided with a fixture plane detection sensor, which is a through-beam laser sensor. The laser path of the fixture plane detection sensor extends along the top surface of the fixture. The clamping mounting base is provided with a transformer position detection sensor, which is a laser through-beam switch.

[0009] As a further step of this design, the clamping mounting base is provided with a mounting hole for placing the transformer position detection sensor, and the clamping mounting base is provided with an adjusting screw hole that is perpendicular to the mounting hole. A locking screw is threaded onto the adjusting screw hole, and an eccentric block is provided at the end of the locking screw that extends into the mounting hole.

[0010] As a further aspect of this design, a lifting cylinder is also included. The lifting cylinder is fixed on the upright frame, and the cylinder rod of the lifting cylinder is connected to a fixed base below the drying box. Both ends of the drying box are slidably connected to the upright frame.

[0011] As a further aspect of this design, the drying box includes a main box body with a top opening, a cover plate that is detachably mechanically connected to the top of the main box body, the cover plate having a hot air outlet corresponding to the fixture, and a heating rod that is detachably provided on the main box body.

[0012] The beneficial effects of this utility model are: This utility model uses a secondary pre-pressing positioning component to press and position the transformer on the fixture, which facilitates the precise welding of subsequent welding points and improves welding quality; multiple pre-pressing heads distributed on the pre-pressing distribution plate can simultaneously pre-press and position multiple transformers, further improving efficiency; the secondary pressing and positioning uses a cylinder as the power source, and the entire process is automatically controlled. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0015] Figure 2 This is a schematic cross-sectional view of the present invention.

[0016] Figure 3 This is a cross-sectional schematic diagram of the preload head of this utility model.

[0017] Figure 4This is a schematic diagram of the horizontal cross-sectional structure of the transformer position detection sensor of this utility model.

[0018] Figure 5 This is a vertical cross-sectional structural diagram of the installation position of the transformer position detection sensor of this utility model.

[0019] Figure 6 This is a three-dimensional structural diagram of the pre-loading secondary positioning of the transformer according to this utility model.

[0020] In the diagram: 1. Lifting cylinder, 2. Fixed seat, 3. Secondary positioning pre-compression assembly, 30. Positioning fixed seat, 31. Pre-compression cylinder, 32. Pre-compression clearance cylinder, 33. Pre-compression distribution plate, 34. Pre-compression head, 340. Pre-compression shaft seat, 341. Pre-compression ejector pin, 342. Buffer spring, 343. Pressure detection sensor, 4. Fixture clamping and positioning assembly, 40. Stand, 41. Clamping mounting seat, 42. Cylinder gripper, 43. Fixture positioning pin, 5. Drying box, 50. Main box body, 51. Cover plate, 52. Hot air outlet, 53. Heating rod, 6. Pre-compression stop plate, 7. Fixture plane detection sensor, 8. Mounting hole, 9. Transformer position detection sensor, 10. Eccentric block, 11. Adjusting screw hole, 12. Locking screw, 13. Fixture, 14. Transformer. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0022] Example: A flux drying device for a miniature surface mount transformer includes a drying box 5, a fixture clamping and positioning assembly 4 located above the drying box 5, and a secondary positioning and pre-pressing assembly 3. The drying box 5 has a hot air outlet 52 at its top. The fixture clamping and positioning assembly 4 includes uprights 40 located at both ends of the drying box 5, a clamping mounting base 41 disposed on the top of the uprights 40, and a cylinder gripper 42 disposed on the clamping mounting base 41. The gripper of the cylinder gripper 42 is provided with a fixture positioning pin 43. The secondary positioning and pre-pressing assembly 3 includes a positioning fixing seat 3. 0. A pre-pressure cylinder 31 is mounted on the positioning and fixing seat 30; a pre-pressure avoidance cylinder 32 is mounted on the pre-pressure cylinder 31; a pre-pressure distribution plate 33 is mounted on the pre-pressure avoidance cylinder 32; and a pre-pressure head 34 is mounted on the pre-pressure distribution plate 33. The pre-pressure head 34 corresponds one-to-one with the transformer 14 on the fixture 13. The extension and retraction direction of the pre-pressure cylinder 31 is vertical, and the extension and retraction direction of the pre-pressure avoidance cylinder 32 is horizontal. The pre-pressure head 34 has a pre-pressure position directly below the transformer 14 and an avoidance position below the fixture 13.

[0023] The above-mentioned secondary pre-pressure positioning component is used to press and position the transformer 14 on the fixture 13, which facilitates the precise welding of subsequent welding points and improves the welding quality. Multiple pre-pressure heads 34 distributed on the pre-pressure distribution plate 33 can simultaneously pre-press and position multiple transformers 14, further improving efficiency. The secondary pressing and positioning uses a cylinder as the power source and is fully automated.

[0024] While improving the pre-compression efficiency, the pre-compression head 34 is prevented from damaging the transformer 14 and from impacting the pre-compression cylinder 31 during pre-compression. The pre-compression head 34 includes a pre-compression bearing 340, a pre-compression pin 341 that slides up and down along the pre-compression bearing 340, and a buffer spring 342 that connects the pre-compression pin 341 and the bottom of the pre-compression bearing 340. The buffer spring 342 applies an upward elastic force to the pre-compression pin 341.

[0025] The pre-pressure distribution plate 33 is provided with a pre-pressure stop plate 6 at the bottom. The pre-pressure stop plate 6 is located directly below the pre-pressure ejector pin 341. When the pre-pressure ejector pin 341 is compressed to the end of the lower stroke, its bottom abuts against the top surface of the pre-pressure stop plate 6, which facilitates the pre-pressure of the transformer 14 into place.

[0026] To facilitate automatic detection of whether the transformer 14 is properly compressed, the pre-pressure stop plate 6 is provided with a pre-pressure detection sensor 343 corresponding to the pre-pressure pin 341. The pre-pressure detection sensor 343 is used to detect whether the pre-pressure pin 341 is properly pre-pressed.

[0027] To facilitate the precise transfer of fixture 13 and the subsequent detection of the position of transformer 14, a fixture plane detection sensor 7 is provided on the top of the support frame 40. The fixture plane detection sensor 7 is a through-beam laser sensor, and the laser path of the fixture plane detection sensor 7 extends along the top surface of the fixture 13. A transformer position detection sensor 9 is provided on the clamping mounting base 41. The transformer position detection sensor 9 is a through-beam laser switch.

[0028] To facilitate automatic position detection of the transformer 14, the clamping mounting base 41 is provided with mounting holes 8 for placing the transformer position detection sensor 9. The clamping mounting base 41 also has adjusting screw holes 11 perpendicular to the mounting holes 8. A locking screw 12 is threaded onto the adjusting screw hole 11, and an eccentric block 10 extends into the mounting hole 8 at the end of the locking screw 12. The eccentric block 10 is used to lock the transformer position detection sensor 9 in place, facilitating fine-tuning and improving detection accuracy. One clamping mounting base 41 has two transformer position detection sensors 9. The detection paths of the transformer position detection sensors 9 are located on both sides of the transformer 14, used to detect whether the transformer 14 is tilted. During adjustment, rotating the locking screw 12 disengages the eccentric block 10 from the transformer position detection sensor 9. The transformer position detection sensor 9 is then manually adjusted to the appropriate position. Rotating the locking screw 12 again presses the transformer position detection sensor 9 into the mounting hole 8. To improve stability, the locking screw 12 can have an anti-loosening thread structure, or it can be fitted with double nuts or elastic washers.

[0029] To avoid the pre-compression distribution plate 33, a lifting cylinder 1 is also included. The lifting cylinder 1 is fixed on the upright frame 40, and the cylinder rod of the lifting cylinder 1 is connected to the fixed base 2 below the drying box 5. Both ends of the drying box 5 are slidably connected to the upright frame 40. The drying box is fixed on the fixed object of the machine base and remains stationary during operation. The fixed base uses heat-insulating material to conduct heat to the lifting cylinder.

[0030] The drying box 5 includes a main box body 50 with a top opening and a cover plate 51 detachably mechanically connected to the top of the main box body 50. The cover plate 51 has a hot air outlet 52 corresponding to the fixture 13. The main box body 50 is detachably equipped with a heating rod 53, which can be installed using a C-shaped elastic bracket. To improve drying efficiency, a hot air rod can be used as a heat source inside the main box body 50.

[0031] During operation, the multi-axis robot transfers the fixture 13 containing the transformer 14 to the clamping position of the fixture clamping and positioning assembly 4, where the cylinder grippers 42 hold both ends of the fixture 13. When the cylinder grippers 42 hold the fixture 13 at the end of the upper stroke, the pre-pressure distribution plate 33 of the secondary positioning pre-pressure assembly 3 translates, and the pre-pressure head 34 moves below the transformer 14. The pre-pressure distribution plate 33 rises, and the pre-pressure head 34 rises to abut the bottom of the transformer 14, pressing the transformer 14 firmly into the step or countersunk hole of the fixture 13. After the pre-pressure distribution plate 33 descends and translates, the pre-pressure head 34 exits above the drying box 5, and the cylinder grippers 42 hold the fixture 13 as it descends to the end of the lower stroke to dry the flux on the transformer 14.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flux drying device for miniature surface mount transformers, characterized in that, The device includes a drying box, a fixture clamping and positioning assembly located above the drying box, and a secondary positioning and pre-pressing assembly. The drying box has a hot air outlet at the top. The fixture clamping and positioning assembly includes uprights at both ends of the drying box, a clamping mounting base on the top of the uprights, and a cylinder gripper on the clamping mounting base. The gripper of the cylinder gripper has a fixture positioning pin. The secondary positioning and pre-pressing assembly includes a positioning fixing base, a pre-pressing cylinder on the positioning fixing base, a pre-pressing clearance cylinder on the pre-pressing cylinder, a pre-pressing distribution plate on the pre-pressing clearance cylinder, and a pre-pressing head on the pre-pressing distribution plate. Each pre-pressing head corresponds to a transformer on the fixture. The extension and retraction direction of the pre-pressing cylinder is vertical, and the extension and retraction direction of the pre-pressing clearance cylinder is horizontal. The pre-pressing head has a pre-pressing position directly below the transformer and a clearance position below the fixture.

2. The flux drying device for a miniature surface mount transformer according to claim 1, characterized in that, The pre-pressure head includes a pre-pressure bearing, a pre-pressure pin that slides up and down along the pre-pressure bearing, and a buffer spring connecting the pre-pressure pin and the bottom of the pre-pressure bearing. The buffer spring applies an upward elastic force to the pre-pressure pin.

3. The flux drying device for a miniature surface mount transformer according to claim 2, characterized in that, The pre-pressure distribution plate is provided with a pre-pressure stop plate at the bottom. The pre-pressure stop plate is located directly below the pre-pressure ejector pin. When the pre-pressure ejector pin is compressed to the end of the lower stroke, its bottom abuts against the top surface of the pre-pressure stop plate.

4. The flux drying device for a miniature surface mount transformer according to claim 3, characterized in that, The pre-pressure stop plate is equipped with a pre-pressure detection sensor that corresponds one-to-one with the pre-pressure ejector pin. The pre-pressure detection sensor is used to detect whether the pre-pressure ejector pin is pre-pressed in place.

5. The flux drying device for a miniature surface mount transformer according to claim 1, characterized in that, The top of the stand is equipped with a fixture plane detection sensor, which is a through-beam laser sensor. The laser path of the fixture plane detection sensor extends along the top surface of the fixture. The clamping mounting base is equipped with a transformer position detection sensor, which is a laser through-beam switch.

6. The flux drying device for a miniature surface mount transformer according to claim 5, characterized in that, The clamping mounting base is provided with a mounting hole for placing the transformer position detection sensor. The clamping mounting base is provided with an adjustment screw hole that is perpendicular to the mounting hole. A locking screw is threaded onto the adjustment screw hole, and an eccentric block is provided at the end of the locking screw that extends into the mounting hole.

7. The flux drying device for a miniature surface mount transformer according to claim 1, characterized in that, It also includes a lifting cylinder, which is fixed on the upright frame. The cylinder rod of the lifting cylinder is connected to the fixed base below the drying box, and both ends of the drying box are slidably connected to the upright frame.

8. The flux drying device for a miniature surface mount transformer according to claim 1, characterized in that, The drying box includes a main box body with a top opening and a cover plate that is detachably mechanically connected to the top of the main box body. The cover plate has a hot air outlet corresponding to the fixture, and the main box body is detachably equipped with a heating rod.

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