A diaphragm forming fitting process

Abstract

This invention relates to a diaphragm molding and mating process, belonging to the field of electroacoustic product manufacturing technology. The process includes the following steps: First, a base frame with an outer metal ring is placed inside a lower template. Adhesive is applied around the outer edge of the inner side of a hole in the center of the base frame, with the outer metal ring acting as a rigid support around the base frame. Second, the diaphragm is placed inside the hole and covered with the adhesive area. Subsequently, a downward, uniformly distributed pressure is applied to the diaphragm and base frame, ensuring a tight fit between them in a flat state, followed by pressure-holding and curing. Finally, after bonding with the structural component, the outer metal ring is cut and separated. This invention, by introducing an outer metal ring as a rigid support, effectively overcomes the problem of edge warping caused by the inherent stress of the base frame and diaphragm during molding and bonding with the structural component.

Description

Technical Field

[0001] This invention belongs to the field of electroacoustic product manufacturing technology, specifically relating to a diaphragm molding and fitting process. Background Technology

[0002] As a core acoustic component in electroacoustic products such as receivers and loudspeakers, the diaphragm's molding quality directly determines the sound quality stability of the final product. Current diaphragm and frame assembly processes present the following technical challenges: Material properties leading to deformation: Diaphragms are typically made of extremely thin polymer films, which are flexible and highly susceptible to environmental stress. During adhesive application, placement, and pressing, without effective support, the diaphragm is prone to wrinkling, collapse, or edge warping. This solution was developed in order to address this problem. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a diaphragm forming process that does not cause damage to the base frame during the diaphragm forming process.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a diaphragm molding and fitting process, comprising the following steps: S1. Place the base frame with the outer metal ring inside the lower template. The base frame has a hole in the middle. Apply glue around the outer edge of the hole. The outer metal ring serves as a rigid support and surrounds the base frame. S2. Place the diaphragm inside the hole and cover the hole and the glue area; S3. Apply downward uniform pressure to the diaphragm and the base frame, ensuring that the base frame and diaphragm fit tightly together in a flat state, and then perform pressure holding and curing treatment. S4. After bonding with the structural components, cut the outer metal ring.

[0005] Furthermore, in step S1, the horizontal cross-section of the base frame is rectangular in shape and has a hole in the middle. The base frame includes a first horizontal part, a first arc part, a second horizontal part and a first vertical part from the inside to the outside. The center of the first arc part faces downward, and the upper and lower surfaces of the first horizontal part and the second horizontal part are flush.

[0006] Furthermore, the horizontal cross-sectional projection of the outer metal ring is rectangular. The outer metal ring is arranged in a closed loop along the second horizontal portion. The outer metal ring includes a first connecting portion, a protruding portion, and a second connecting portion from the inside to the outside. The protruding portion protrudes upwards, and the first connecting portion is connected to the lower end of the first vertical portion.

[0007] Furthermore, the metal ring is made of hard metal.

[0008] Furthermore, in step S4, the outer metal ring is cut using laser cutting or stamping die cutting.

[0009] Furthermore, in step S1, the adhesive applied is a thermosetting adhesive or a two-component epoxy resin adhesive, and an automatic dispensing device is used to continuously apply it in a closed loop along the outer edge of the hole.

[0010] Furthermore, in step S2, when placing the diaphragm at the hole position, a CCD vision system or contour positioning fixture is used for auxiliary alignment to ensure the concentricity of the diaphragm center and the base frame hole center.

[0011] Furthermore, the pressure holding and curing process in step S3 specifically involves the following steps: while the pressing fixture maintains uniform pressure, a synchronous heating device bakes the adhesive until the adhesive is completely cured, after which the pressure is removed.

[0012] Furthermore, the specific steps of laser cutting in step S4 are as follows: after the diaphragm and the base frame are formed and glued to the structural components, the CCD vision system identifies the area of ​​the first horizontal part and cuts along the edge of the first horizontal part close to the first vertical part.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. An outer metal ring, introduced during the process, acts as a rigid support, encircling the base frame throughout the molding process. This effectively overcomes the edge warping caused by stress during the bonding of the base frame and diaphragm to the structural components. The metal ring is made of hard metal, capable of resisting mechanical impacts on automated production lines, ensuring a consistent shape of the base frame before cutting.

[0014] 2. A CCD vision system is used for assisted alignment, which can capture and correct the positional deviation between the diaphragm center and the base frame hole center in real time. The extremely high concentricity ensures that the diaphragm is subjected to uniform force, thus avoiding abnormal sound and sound pressure imbalance caused by eccentricity from the source.

[0015] 3. Supports laser cutting or stamping die cutting, which can quickly and accurately remove support waste. Especially in laser cutting mode, the CCD vision system accurately identifies the cutting edge (the area of ​​the first horizontal part close to the first vertical part), and completes the separation of the outer metal ring without damaging the core diaphragm structure. The base frame is cut in an inverted state, and its specific structure (such as the center of the arc part facing down) is used in conjunction with the mold to further improve the support stability during the cutting process. Attached Figure Description

[0016] Figure 1 This is a top view of the base frame and metal ring of the present invention; Figure 2 This is a three-dimensional structural diagram of the lower template in this invention; Figure 3 This is a three-dimensional structural schematic diagram of the bonding process at the adhesive station in this invention; Figure 4 This is a top view of the structure after the base frame and diaphragm are bonded together in this invention; Figure 5 This is a bottom view of the structure after the base frame and diaphragm are bonded together in this invention.

[0017] The markings in the diagram are: 1. Outer metal ring; 11. First connecting part; 12. Protrusion; 13. Second connecting part; 2. Base frame; 21. First horizontal part; 22. First arc part; 23. Second horizontal part; 24. First vertical part; 3. Diaphragm; 4. Lower template; 41. First annular groove; 42. Second annular groove; 43. First annular support surface; 44. First annular arc groove; 45. Support plane; 5. Positioning block; 6. Pressure ring. Detailed Implementation

[0018] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0019] like Figures 1-5 As shown, this embodiment provides a diaphragm 3 molding and fitting process, including the following steps: S1. Place the base frame 2 with the outer metal ring 1 inside the lower template 4. The base frame 2 has a hole in the middle. Apply glue around the outer edge of the hole. The outer metal ring 1 serves as a rigid support and surrounds the base frame 2. S2. Place the diaphragm 3 inside the hole and cover the hole and the glue area; S3. Apply downward uniform pressure to the diaphragm 3 and the base frame 2. The base frame 2 and the diaphragm 3 are tightly attached in a flat state and pressure holding and curing treatment is performed. S4. After bonding with the structural components, cut the outer metal ring 1.

[0020] In step S1, the horizontal cross-section of the base frame 2 is rectangular with a hole in the center. The base frame 2, from the inside out, includes a first horizontal portion 21, a first arc portion 22, a second horizontal portion 23, and a first vertical portion 24. The center of the first arc portion 22 faces downwards. The upper and lower surfaces of the first horizontal portion 21 and the second horizontal portion 23 are flush. The horizontal cross-section of the outer metal ring 1 is rectangular, and the outer metal ring 1 is arranged in a closed loop along the second horizontal portion 23. The outer metal ring 1, from the inside out, includes a first connecting portion 11, a protrusion 12, and a second connecting portion 13. The protrusion 12 protrudes upwards. The first connecting portion 11 is connected to the lower end of the first vertical portion 24. The metal ring is made of hard metal. In this embodiment, the metal ring is made of iron.

[0021] This embodiment designs a mold for forming the base frame 2 and the diaphragm 3, such as... Figure 2 As shown, the lower template 4 is provided with a first annular groove 41, a second annular groove 42, a first annular support surface 43, a first annular arc groove 44, and a support plane 45 from the inside to the outside. The first annular groove 41 is adapted to the second connecting part 13, the second annular groove 42 is adapted to the first connecting part 11 and the protrusion 12, the first annular support surface 43 is adapted to the second horizontal part 23, the first annular arc groove 44 is adapted to the first arc part 22, and the support plane 45 is adapted to the first horizontal part 21.

[0022] The specific steps of step S1 are as follows: the base frame 2 with the outer metal ring 1 is placed upside down in the lower template 4, and glue is applied around the outer edge of the inner side of the hole. The glue is preferably a thermosetting glue or a two-component epoxy resin glue. In this embodiment, a two-component epoxy resin glue is used, and an automatic dispensing device is used to continuously apply the glue in a closed loop along the outer edge of the hole.

[0023] Step S2 is as follows: Place the diaphragm 3 inside the hole, covering both the hole and the glue area. During placement, use a CCD vision system or contour positioning fixture for alignment assistance to ensure the concentricity of the center of the diaphragm 3 with the center of the hole in the base frame 2. This allows for real-time capture and correction of positional deviations, and the extremely high concentricity ensures uniform force on the diaphragm 3, preventing abnormal sounds and sound pressure imbalances caused by eccentricity from the outset.

[0024] Step S3 is as follows: A downward, uniformly distributed pressure is applied to the diaphragm 3 and the base frame 2. The base frame 2 and the diaphragm 3 are tightly bonded in a flat state, and a pressure-holding curing process is performed. While the pressing fixture maintains uniform pressure, a synchronous heating device bakes the adhesive until the adhesive is completely cured, and then the pressure is removed. This process, supported by the outer metal ring 1, effectively overcomes the edge warping caused by the stress of the base frame 2 itself.

[0025] Step S4 is as follows: After placing the structural component in the adhesive bonding station, apply adhesive to the structural component, mate the base frame 2 with the diaphragm 3 to the structural component, and then apply pressure to cure and bond it. During this process, the outer metal ring 1 effectively overcomes the edge warping caused by the stress of the base frame 2 itself. Even if warping occurs, it is only the outer metal ring 1 that warps and will not affect the base frame 2 itself. After bonding, the outer metal ring 1 is cut by laser cutting. The CCD vision system identifies the area of ​​the first horizontal part 21 and cuts along the edge of the first horizontal part 21 close to the first vertical part 24. This method can quickly and accurately separate the outer metal ring 1 without damaging the core diaphragm 3 structure. The height difference between the second horizontal part 23 and the first connecting part 11 allows the CCD vision system to quickly identify them.

[0026] Preferably, such as Figure 3 As shown, when the base frame 2 and the metal ring are glued to the structural components in step S4, L-shaped positioning blocks 5 are set around the glued area. During the bonding process, the second connecting part 13 of the outer metal ring 1 will be placed on the upper surface of the short side of the L-shaped positioning block 5. When pressing, a pressure ring 6 will be set to press the upper surface of the second connecting part 13. In this way, during the bonding process, the additional stress will only be borne by the outer metal ring 1 and will not damage the base frame 2 and the diaphragm 3.

[0027] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A diaphragm forming fitting process characterized by: The method comprises the following steps: S1, placing a base frame with an outer metal ring in a lower mold plate, the base frame having a hole in the middle, glue being applied around the outer edge of the hole, the outer metal ring serving as a rigid support and surrounding the periphery of the base frame; S2, placing a diaphragm inside the hole and covering the hole and the glue area; S3, applying uniform pressure to the diaphragm and the base frame, the base frame and the diaphragm being tightly attached in a flat state, and performing pressure retention and curing treatment; S4, cutting the outer metal ring after bonding with a structural member.

2. A diaphragm forming fitting process according to claim 1, characterized in that: In the step S1, the horizontal section of the base frame is rectangular and has a hole in the middle, the base frame comprising, from the inside to the outside, a first horizontal part, a first circular arc part, a second horizontal part, and a first vertical part, the first circular arc part having its center downward, the upper and lower surfaces of the first and second horizontal parts being flush.

3. A diaphragm forming fitting process according to claim 2, wherein: The horizontal section of the outer metal ring is rectangular, the outer metal ring being arranged in a closed loop along the second horizontal part, the outer metal ring comprising, from the inside to the outside, a first connecting part, a protruding part, and a second connecting part, the protruding part being upwardly protruding, and the first connecting part being connected to the lower end of the first vertical part.

4. A diaphragm forming fitting process according to claim 1, wherein: The metal ring is a hard metal.

5. A diaphragm forming fitting process according to claim 1, wherein: In the step S4, the outer metal ring is cut by laser cutting or stamping die cutting.

6. A diaphragm forming fitting process according to claim 1, wherein: In the step S1, the glue applied is a heat-curing glue or a two-component epoxy resin glue, and an automatic dispensing device is used to continuously apply the glue in a closed loop along the outer edge of the hole.

7. A diaphragm forming fitting process according to claim 1, wherein: In the step S2, when the diaphragm is placed in the hole, a CCD vision system or a profiling positioning tool is used to assist in alignment to ensure the concentricity of the center of the diaphragm and the center of the hole of the base frame.

8. A diaphragm forming fitting process according to claim 1, wherein: In the step S3, the pressure retention and curing treatment comprises the following steps: under the condition that the pressing jig continuously maintains uniform pressure, a synchronous heating device is used to bake the glue until the glue is completely cured, and then the pressure is removed.

9. A diaphragm forming fitting process according to claim 2, wherein: In the step S4, the laser cutting is performed as follows: after the diaphragm and the base frame are formed and bonded with the structural member, a CCD vision system is used to identify the area of the first horizontal part and cut along the edge of the first horizontal part close to the first vertical part.

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