Electromagnetic buzzer winding process

Abstract

The invention discloses an electromagnetic buzzer winding process, and belongs to the field of electroacoustic components. According to the process, the problems that the winding and welding procedures of the electromagnetic buzzer cannot be connected and the product reliability is poor are solved, meanwhile, full-automatic mechanical production can be realized by adopting the process, the labor cost is greatly saved, the production period is shortened, the production cost of the electromagnetic buzzer is reduced, and the electromagnetic buzzer comprises an iron core, a PCB (Printed Circuit Board) and a coil. The iron core and the PCB are bonded to form the framework and then are wound, two wire ends of a coil inlet wire and a coil outlet wire are respectively wound on positive and negative pole lugs of the PCB, and then the enameled wire is welded at the bottoms of the lugs and is provided with a tin layer, so that the effect of conducting the enameled wire with copper foil and PINs of the PCB is achieved, the method is simple, the mechanical automation operation is easy to realize, the production cycle time is shortened, and the production efficiency is improved. A large number of circulating tool clamps are saved, the reliability of the buzzer is ensured, the process is simplified, and automatic equipment is easy to design and complete.

Description

Technical Field

[0001] The invention relates to an electromagnetic buzzer winding process and belongs to the field of electro-acoustic components. Background Art

[0002] At present, the production of electromagnetic buzzers is mainly based on a labor-intensive production and processing model, which requires high technical proficiency of production personnel, a large number of personnel, a high defective rate and low reliability during the production process.

[0003] The production process of winding and welding wires of electromagnetic buzzers: iron core winding → bonding PCB board → welding wire → impedance testing. In the past decades of technological development, electromagnetic buzzers have gradually developed automatic winding machines, three-axis welding machines, etc. However, these automated equipment require a lot of technical personnel, and the continuity of production is not strong. There are a lot of tooling fixtures, and the production cycle is long, which makes it impossible to reduce costs. In the production process of buzzers, the most difficult to automate is the welding process, which requires the wire ends of the coil enameled wire to be flat on the copper clad board of the PCB board. Manual welding requires manual tweezers to clamp the wire. The soldering iron welding of the enameled wire is difficult to control and the welding time is difficult to control when the enameled wire is in a taut state, which can easily cause the enameled wire to be damaged and broken. With the continuous increase in labor costs, the manufacturing cost of buzzers is also increasing. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a process for winding an electromagnetic buzzer, which solves the problem that the electromagnetic buzzer winding and wire welding processes cannot be connected and the problem of product reliability. At the same time, the process can realize fully automatic mechanized production, greatly saving labor costs and shortening the production cycle, thereby reducing the production cost of the electromagnetic buzzer.

[0005] In order to solve the above technical problems, the present invention is implemented through the following technical solutions. The present invention provides an electromagnetic buzzer winding dip soldering process: comprising an iron core, a PCB board, and a coil, firstly bonding the iron core and the PCB board to form a skeleton and then winding the wire, the two wire ends of the coil inlet and outlet wires are respectively wound on the positive and negative electrode ears of the PCB board, and then a tin layer is set at the bottom of the welding wire ears to achieve the effect of conducting the enameled wire with the copper foil of the PCB board and the PIN needle. The method is simple and easy to realize mechanical automation operation;

[0006] The skeleton is formed by bonding the iron core and the PCB board;

[0007] The iron core is formed by spot welding a core column and a metal plate. The core column is cylindrical, the metal plate is a circular plate, and the material is metal iron with a nickel or zinc plated surface. The core column in the middle of the iron core serves as a coil.

[0008] The PCB board is riveted on a single-layer copper-clad board by PIN pins, and the copper-clad board includes a PCB substrate and copper foil;

[0009] The PIN needle is cylindrical, made of copper or copper alloy, and plated with tin or gold;

[0010] The ears are protruding parts on both sides of the PCB board, with copper foil on the surface, and the copper foil is conductively connected with the PIN needle.

[0011] Beneficial Effects

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The skeleton after the core and PCB board are bonded does not have the corresponding upper and lower production process relationship with the winding and welding processes.

[0014] Can be produced separately in sections, shortening the production cycle time;

[0015] 2. The winding and welding processes are combined into one process, and mechanical automation is adopted, which saves the number of personnel for winding and welding, and saves a large number of flow fixtures;

[0016] 3. The winding method makes the enameled wire wrapped around the PCB board ear in a semi-loose state, which maximizes the elasticity of the enameled wire and prevents the buzzer from breaking due to the enameled wire breaking, thereby ensuring the reliability of the buzzer;

[0017] Fourth, the winding method can set the number of turns of the winding coil. The multiple turns of the enameled wire can further ensure the reliability of welding;

[0018] 5. The process is simplified and the automated equipment is easy to design. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a three-dimensional structural diagram of the winding of an electromagnetic buzzer.

[0020] Figure 2 The figure is a top view of the winding of an electromagnetic buzzer according to the present invention.

[0021] Figure 3 The figure is a front view of the winding of an electromagnetic buzzer according to the present invention.

[0022] Figure 4 The present invention is a cross-sectional view of an ear-wound electromagnetic buzzer.

[0023] In the attached figure:

[0024] 1. Core column; 2. Metal plate; 3. PCB substrate; 4. Copper foil; 5. PIN needle; 6. Tin layer; 7. Ear; 8. Enameled wire;

[0025] 9. Coil. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings.

[0027] according to Figure 1-4 As shown: The present invention provides a winding process for an electromagnetic buzzer: comprising an iron core, a PCB board, and a coil 9, the iron core and the PCB board are first bonded to form a skeleton and then the winding is performed, the two wire ends of the inlet and outlet wires of the coil 9 are respectively wound on the positive and negative electrode ears 7 of the PCB board, and then a tin layer 6 is set at the bottom of the welding wire ears 7. The enameled wire 8 is connected to the copper foil 4 of the PCB board and the PIN needle 5, the method is simple, and the mechanical automation operation is easy to realize;

[0028] The skeleton is formed by bonding the iron core and the PCB board;

[0029] The iron core is formed by spot welding a core column 1 and a metal plate 2. The core column 1 is cylindrical, and the metal plate 2 is a circular plate made of metal iron with a nickel or zinc plated surface. The core column 1 in the middle of the iron core is wound around the coil 9.

[0030] The PCB board is a single-layer copper-clad board riveted with PIN pins 5, and the copper-clad board includes a PCB substrate 3 and a copper foil 4;

[0031] The PIN needle 5 is cylindrical, made of copper or copper alloy, and plated with tin or gold;

[0032] The ears 7 are protruding parts on both sides of the PCB board, and have copper foil 4 on the surface. The copper foil 4 is conductively connected to the PIN needle 5.

[0033] The specific implementation process is as follows:

[0034] Frame making: The iron core is automatically loaded and epoxy resin is automatically applied to the metal plate 2 on the reverse side of the iron core column 1. The PCB is automatically loaded and placed on the metal plate 2 on which epoxy resin is applied to the iron core and flows into the oven line. It is baked at 120° for 30-40 minutes and then automatically unloaded.

[0035] Winding: The bobbin is automatically loaded and placed on the device of the fully automatic winding machine. The winding machine device winds the inlet end of the enameled wire 8 on the positive electrode lug 7 of the bobbin PCB board for several turns and cuts off the excess wire ends. Then the enameled wire 8 is wound on the bobbin core column 1 at high speed as required. After the coil 9 is wound, the winding machine device winds the outlet end of the enameled wire 8 on the negative electrode lug 7 of the bobbin PCB board for several turns and cuts off the excess wire ends.

[0036] Wire welding: The wire-wound skeleton is transported to the wire welding area by a carrier, and the robot clamps the wire-wound skeleton, and the positive and negative lugs 7 of the PCB board at the inlet and outlet ends of the wound enameled wire 8 are welded by electronic micro-spot welding in turn, and the copper foil 4 on the positive and negative lugs 7 of the skeleton PCB board are instantly heated and high-pressured to melt the insulating paint of the enameled wire 8 at the inlet and outlet ends, so as to achieve the effect of covering and connecting the enameled wire 8 wound by the copper foil 4;

[0037] Test: After the wire-wound skeleton is welded, an automatic impedance tester is used to test whether the resistance of the skeleton after welding meets the standard. Defective products with resistance values ​​exceeding the qualified range, short circuits and open circuits are automatically sorted and removed;

[0038] Plate placement and circulation: Products that meet the test standards are automatically placed on plates and transferred to the next fully automatic assembly process.

[0039] The present invention and its implementation process are described above, and such description is not restrictive. The drawings are only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A winding process for an electromagnetic buzzer, characterized in that: The invention comprises an iron core, a PCB board and a coil (9). The iron core and the PCB board are first bonded together to form a skeleton and then the wire is wound. The two wire ends of the inlet and outlet wires of the coil (9) are respectively wound on the positive and negative electrode ears (7) of the PCB board. The inlet wires are then welded and connected. A tin layer (6) is arranged at the bottom of the ears (7) to achieve the effect of conducting the enameled wire (8) with the copper foil (4) of the PCB board and the PIN needle (5). The method is simple and can easily realize mechanical automation operation.

2. The electromagnetic buzzer winding process according to claim 1, characterized in that: The frame is formed by bonding an iron core and a PCB board.

3. The electromagnetic buzzer winding process according to claim 1, characterized in that: The iron core is formed by spot welding a core column (1) and a metal plate (2); the core column (1) is cylindrical, the metal plate (2) is a circular plate, and is made of metal iron with a surface plated with nickel or zinc. The core column (1) in the middle of the iron core serves as a coil (9).

4. The electromagnetic buzzer winding process according to claim 1, characterized in that: The PCB board is a single-layer copper-clad board riveted with PIN pins (5), and the copper-clad board comprises a PCB substrate (3) and a copper foil (4).

5. The electromagnetic buzzer winding process according to claim 1, characterized in that: The PIN needle (5) is cylindrical, made of metal copper or copper alloy, and has a tin or gold plated surface.

6. The electromagnetic buzzer winding process according to claim 1, characterized in that: The ears (7) are protruding parts on both sides of the PCB board, and have copper foil (4) on the surface. The copper foil (4) is conductively connected to the PIN needle (5).

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