Flat wire inductor production process

Abstract

The invention discloses a production process of a flat wire inductor. The production process comprises the following steps: step 2, dispensing a window surface and a contact surface of a magnetic core through a dispensing machine; 3, loading the magnetic core in a special steel clamp, sucking the bonding pad base sheet by using a pneumatic sheet sucking machine, loading the flat coil in a limiting jig, and carrying out alignment and diagonal pressing; 4, loading a magnetic core, a bonding pad base sheet and a flat coil semi-assembly product by adopting a special steel clamp, sucking and holding an I sheet by adopting a pneumatic sheet sucking machine, and carrying out counterpoint and diagonal pressing and holding; step 5, performing soldering tin fixation on the double PINs of the electrode pad base sheet of the flat coil; seventhly, the semi-finished product is loaded in a fixedly-installed limiting jig, and the semi-finished product is put into a tunnel furnace to be baked; 8, taking out from the tunnel furnace and cooling; and twelfthly, laser etching is conducted on the laser etching face of the magnetic core. The problems of power consumption, overlarge size, low production efficiency and the like are effectively solved, and the flat wire inductor is not easy to damage the I piece during assembly, easy to position during assembly, simple in process and high in stability after soldering.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic accessories production technology, and specifically relates to a flat wire inductor production technology. Background Art

[0002] The coil part of the flat wire inductor is a flat coiled conductive wire with its two ends bent toward the external circuit connection direction. It has the lowest DC resistance of the same size and can ensure a smooth drop in the current resistance inductance value.

[0003] There are certain problems with the current installation of flat wire inductors: the assembly of flat wire inductors is prone to damage the I-chip, the existing flat wire inductors are difficult to position during assembly at the customer end, the process is too complicated, and the stability after soldering is poor. Summary of the invention

[0004] The purpose of the present invention is to provide a flat wire inductor production process to solve the problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: a flat wire inductor production process, comprising the following steps:

[0006] Step 1: Make a flat coil using an automated coil winding machine;

[0007] Step 2: Use a glue dispenser to dispense glue on the core window surface and contact surface;

[0008] Step 3: Load the magnetic core into a special steel clamp, hold the pad base sheet with a pneumatic suction machine, and load the flat coil into a limiting fixture, and press it diagonally;

[0009] Step 4: Use a special steel clip to load the magnetic core, pad base sheet and flat coil semi-assembly, use a pneumatic suction machine to hold the sheet, and press it diagonally;

[0010] Step 5: Fix the double PINs of the electrode pad base sheet of the flat coil by soldering;

[0011] Step 6: Use an inductance tester to conduct a comprehensive test on the semi-finished product;

[0012] Step 7: Load the semi-finished product into the fixed limiting fixture and bake it in the tunnel furnace;

[0013] Step 8: Take out from the tunnel oven and cool;

[0014] Step 9: Use an inductive withstand voltage tester to perform a withstand voltage test on the finished product;

[0015] Step 10: Use an inductance tester to conduct a comprehensive test on the finished product;

[0016] Step 11: Detect the mirror flatness of the finished product;

[0017] Step 12: Perform laser engraving on the laser engraved surface of the magnetic core.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The pad base plate structure can be used to easily weld the product to the client's mainboard, effectively stabilize the product, and achieve large-scale production; this structure can effectively improve the displacement of the coil in the core window, and the consistency of the product structure is effectively guaranteed.

[0020] (2) It effectively solves the problems of power consumption, large size, low production efficiency, etc. The flat wire inductor assembly is not easy to damage the I-chip, the assembly is easy to position, the process is simple, and the stability after soldering is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the magnetic core structure in the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the pad base sheet in the present invention;

[0023] Figure 3 It is a schematic diagram of the flat coil structure in the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the I sheet in the present invention;

[0025] Figure 5 It is a schematic diagram of the assembly state in the present invention;

[0026] Figure 6 This is a schematic diagram of the state of one side of the flat inductor after the process of the present invention is completed;

[0027] Figure 7 It is a schematic diagram of the state of the other side after the flat inductor process is completed in the present invention.

[0028] In the figure: 1 magnetic core, 2 pad base sheet, 3 flat coil, 4 I sheet. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 A flat wire inductor production process comprises the following steps:

[0031] Step 1: Make a flat coil 3 by an automated coil winding machine.

[0032] Step 2: Use a glue dispenser to dispense glue on the window surface and contact surface of the core 1; the air pressure of the glue dispenser is 0.1-0.3MPa, the glue dispensing time is 0.02-0.03s, and the heating temperature is 60±5℃ in winter and 50±5℃ in summer; dispense glue on the diagonal of the window, and the glue needs to fill the side columns.

[0033] Step 3: Load the magnetic core 1 into a special steel clamp, hold the pad base sheet 2 with a pneumatic suction machine, and load the flat coil 3 into a limiting fixture, and press it diagonally;

[0034] Step 4: Use a special steel clip to load the semi-assembled products of the magnetic core 1, the pad base sheet 2 and the flat coil 3, and use a pneumatic suction machine to suck and hold the sheet 4, and press and hold it diagonally;

[0035] In step 3 and step 4, the air pressure of the pneumatic suction machine is 0.4-0.6MPa, which aligns the magnetic core 1 left and right and front and back to prevent misalignment; the misalignment of the magnetic core 1 is less than 0.3mm, the flat coil pins are flush with the side of the magnetic core 1, and the pins are aligned with the assembly pad base sheet 2.

[0036] Step 5: Fix the double PIN 5 of the electrode pad base plate 2 of the flat coil 3 by soldering; use a special solder chuck for soldering, temperature: 420±10℃, time: 0.8~1.2S2 times.

[0037] Step 6: Use an inductance tester to conduct a comprehensive test on the semi-finished product; the inductance tester model selected is: Tonghui 2819XB, the process parameters are: 100KHz, 0.1Vrms, at 0Adc, and the qualified product requirement is: 1uH±20%.

[0038] Step 7: Load the semi-finished product into the fixed limit fixture and bake it in the tunnel oven. The baking temperature is 120℃±10℃ and the baking time is 90 ～ 120 minutes;

[0039] Step 8: Take out from the tunnel oven and cool;

[0040] Before baking, check whether the coil is asymmetrical on the core and whether there is any glue leakage. Do not stick glue on the core surface to ensure that the product surface is clean and free of foreign matter. Disassemble and confirm that the glue must be baked dry and the glue area must be greater than 98%. After baking, cool naturally. The cooling time should be greater than 2 hours and the product must be completely cooled.

[0041] Step 9: Use an inductor withstand voltage tester to test the finished product. The model of the inductor withstand voltage tester is Tonghui-9201, the process parameters are 500V / AC, 1mA / 60S, and the qualified product requirements are: 1 core to 3 flat coils;

[0042] Step 10: Use an inductance tester to conduct a comprehensive test on the finished product; the inductance tester model used is: Tonghui 2819XB, the process parameters are: 100KHz, 0.1Vrms, at 0Adc, and the qualified product requirements are: 1uH±20%, 0.5mΩMax.

[0043] Step 11: Check the mirror flatness of the finished product; if it is found that the product is not close to the mirror panel, use a plug gauge to measure it. The measurement standard is: ≤0.13mm (0.12mm can be plugged in, but 0.13mm cannot).

[0044] Step 12: Perform laser engraving on the laser engraving surface 7 of the magnetic core 1, use a laser engraving positioning fixture to load the finished product, and set the laser engraving machine: speed 1000-3000mm / s, frequency 25-50KHz, power: 20%-60%. Focal length: 240-300mm, based on the clarity of the laser engraved characters; the engraved characters must be clear and straight, and must not be skewed; there must be no broken characters, ghosting, blurring, incompleteness, missing printing, wrong printing, offset printing position, reverse printing and other undesirable phenomena.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A flat wire inductor production process, characterized in that: The following steps are involved: Step 1: Making a flat coil (3) by an automated coil winding machine; Step 2: Apply glue to the window surface and contact surface of the magnetic core (1) using a glue dispenser; Step 3: Load the magnetic core (1) into a special steel clamp, hold the pad base sheet (2) with a pneumatic sheet suction machine, and load the flat coil (3) into a limiting fixture, and press and hold it diagonally; Step 4: Use a special steel clamp to load the semi-assembled products of the magnetic core (1), the pad base sheet (2) and the flat coil (3), and use a pneumatic sheet suction machine to suck and hold the sheet (4), and press and hold it diagonally; Step 5: Fix the double PINs (5) of the electrode pad base plate (2) of the flat coil (3) by soldering; Step 6: Use an inductance tester to conduct a comprehensive test on the semi-finished product; Step 7: Load the semi-finished product into the fixed limiting fixture and bake it in the tunnel furnace; Step 8: Take out from the tunnel oven and cool; Step 9: Use an inductive withstand voltage tester to perform a withstand voltage test on the finished product; Step 10: Use an inductance tester to conduct a comprehensive test on the finished product; Step 11: Detect the mirror flatness of the finished product; Step 12: Perform laser engraving on the laser engraved surface (7) of the magnetic core (1).

2. A flat wire inductor production process according to claim 1, characterized in that: In the step 2, the air pressure of the glue dispensing machine is 0.1-0.3 MPa, the glue dispensing time is 0.02-0.03s, and the heating temperature is 60±5°C in winter and 50±5°C in summer; glue is dispensed diagonally on the window, and the glue needs to fill the side columns.

3. A flat wire inductor production process according to claim 2, characterized in that: In the steps 3 and 4, the air pressure of the pneumatic suction machine is 0.4-0.6 MPa, and the magnetic core (1) is aligned left and right and front and back to prevent misalignment; the misalignment of the magnetic core (1) is less than 0.3 mm, and the flat coil pins are flush with the side of the magnetic core (1), and the pins are aligned with the assembly pad base plate (2).

4. A flat wire inductor production process according to claim 3, characterized in that: In the step 5, a special soldering chuck is used for welding, the temperature is 420±10° C., and the time is 0.8 to 1.2S2 times.

5. The flat wire inductor production process according to claim 1, characterized in that: In the steps 7 and 8, before baking, check whether the coil is asymmetrical on the core and whether there is any glue leakage. Glue is prohibited on the surface of the core to ensure that the product surface is clean and free of foreign matter. Disassemble and confirm that the glue must be baked dry and the glue spot area is greater than 98%. After baking, cool naturally for more than 2 hours and the product needs to be completely cooled.

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