Small loudspeaker diaphragm automatic cutting equipment and method based on coordinate positioning

Abstract

The invention provides small loudspeaker diaphragm automatic cutting equipment and method based on coordinate positioning, and belongs to the technical field of acoustic-electric component machining. The equipment comprises a rack, a positioning platform driven by a Y-axis motor module and an X-axis motor module, a clamping jaw mechanism, a cutting unit, a Z-direction air cylinder and a PLC control unit. The method comprises the following steps of: positioning the whole multi-row multi-hole diaphragm on a positioning platform; the PLC generates a coordinate matrix according to the diaphragm row and column layout; the positioning platform is controlled to move in sequence, and all the acupoints are aligned with the fixed cutting station in sequence; and at each cutting position, the clamping jaw mechanism is controlled to clamp the membrane, and the Z-direction air cylinder is driven to execute single-hole cutting. According to the invention, high-precision, high-efficiency and full-automatic separation of the ultrathin polyester film is realized through the processes of integral positioning, coordinate guiding and hole-by-hole cutting, the defects of high cost, short service life, poor manual operation precision and high risk of a traditional multi-hole same-cutting knife mold are overcome, and the production quality and safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustoelectric device processing, in particular to an automatic cutting equipment for micro loudspeaker ultra-thin diaphragm, and especially to a small loudspeaker diaphragm automatic cutting equipment and method based on coordinate positioning. BACKGROUND

[0002] The vibrating diaphragm in a micro loudspeaker is usually made of a plastic film such as polyester, and its thickness is extremely thin, usually between 0.02 mm and 0.07 mm. In mass production, in order to improve efficiency, a diaphragm whole piece containing dozens of product units is usually formed by a multi-hole die at one time, and these closely arranged diaphragm units need to be separated from the whole piece with high precision.

[0003] The existing cutting technology mainly faces the following challenges: multi-hole synchronous punching, using a multi-hole die to punch at one time, which requires high manufacturing precision of the die, and the gap between the edges of each hole must be strictly consistent, resulting in high cost of the die. When punching ultra-thin materials, multi-point simultaneous force can easily cause plate deformation and uneven stress distribution, accelerating the wear or collapse of certain edges, significantly shortening the service life of the die, and slight deviation in the positioning of the whole piece diaphragm will cause all products to have poor cutting edges, resulting in high scrap rate. Manual single-point or single-row operation, relying on operator manual positioning, using single-hole or single-row die to punch one by one (or by row), this method has low production efficiency, high labor intensity, and completely depends on the experience and attention of the operator, with large positioning accuracy fluctuation and poor product consistency, and manual operation of the stamping equipment has serious safety hazards.

[0004] Insufficient automation, some existing semi-automatic equipment may achieve single-row cutting, but still requires manual intervention for feeding and discharging or step positioning, and cannot realize continuous and fully automatic cutting process of all holes on the whole piece, with limited efficiency improvement.

[0005] Therefore, an innovative solution is needed that can balance the high precision, high flexibility, high economy (long die life) and full-process automation and safety of ultra-thin diaphragm cutting. SUMMARY

[0006] The present application aims to solve the above-mentioned deficiencies in the prior art, and provides a small loudspeaker diaphragm automatic cutting equipment and method based on coordinate positioning. The present application combines a precise two-dimensional coordinate motion platform with a single-hole cutting unit, and is programmed controlled by PLC, realizing a new process of whole piece positioning, coordinate guiding and hole-by-hole separation.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A small loudspeaker diaphragm automatic cutting equipment based on coordinate positioning, comprising: a rack; two parallel tracks arranged on the rack; two Y-axis motor modules arranged on the inner sides of the two tracks; an X-axis motor module horizontally arranged and slidingly installed on the two Y-axis motor modules and the tracks; a positioning platform connected to the X-axis motor module and driven by the X-axis motor module and the Y-axis motor modules to move in two dimensions in a horizontal plane, for carrying a plurality of rows and columns of film sheets; a gripper mechanism arranged on the positioning platform or the rack adjacent to the positioning platform, for grabbing and fixing the film sheets at a cutting station; a cutting unit arranged at a fixed position above the positioning platform, comprising a cutter and a cutting die; a Z-direction driving mechanism installed on the rack and connected to the cutting die, for driving the cutting die and the cutter to perform a cutting action in a vertical direction; a control unit comprising a PLC and a control panel, the PLC being electrically connected to the Y-axis motor modules, the X-axis motor module, the gripper mechanism and the Z-direction driving mechanism, for controlling the coordinated action of the mechanisms.

[0008] Further, the Z-direction driving mechanism is a Z-direction air cylinder, and the cutting die is connected to the piston rod of the Z-direction air cylinder through a floating joint.

[0009] Further, the front side of the positioning platform is provided with a start button and a stop button.

[0010] Further, the gripper mechanism is arranged on opposite sides of the positioning platform.

[0011] In a second aspect, the application provides a small loudspeaker diaphragm automatic cutting method based on coordinate positioning.

[0012] The method applies the above device and comprises the following steps: S1, loading and initial positioning, placing a film sheet with multiple rows and multiple holes formed on the positioning platform and performing overall positioning; S2, coordinate matrix setting, presetting a two-dimensional coordinate matrix corresponding to each cutting hole on the film sheet in the PLC or generating the two-dimensional coordinate matrix according to the visual recognition result; S3, sequential movement and hole-by-hole cutting, the PLC controls the Y-axis motor modules and the X-axis motor module to drive the positioning platform to move according to the sequence of the coordinate matrix, and sequentially accurately transports each cutting hole to the fixed cutting station below the cutting unit; For each hole reaching the cutting station: S31. Control the gripper mechanism to clamp the diaphragm on the positioning platform; S32. Control the Z-axis drive mechanism to drive the cutting mold and cutter to complete a single punching of the acupoint; S33. Control the Z-axis drive mechanism to reset, and then control the gripper mechanism to release; S4. Loop and complete. Repeat step S3 until all acupoints in the coordinate matrix have been cut to obtain separate individual membrane products.

[0013] Furthermore, the diaphragm is a polyester plastic film with a thickness between 0.02 mm and 0.07 mm.

[0014] Furthermore, in step S32, the cutting die is connected to the Z-axis cylinder that drives it via a floating joint to adaptively fine-tune the alignment during cutting.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention transforms the traditional multi-cavity simultaneous positioning and cutting into a single overall positioning and coordinate-guided sequential cutting of each cavity, thus avoiding the manufacturing difficulties and high costs associated with multi-cavity die-cutting molds. Overall positioning combined with high-precision coordinate platform for repeated positioning ensures that the alignment accuracy of each diaphragm unit is the same during cutting, resulting in good product size consistency and smooth, burr-free cuts. Single-cavity cutting dies have a simple structure and a manufacturing cost that is only a fraction of that of multi-cavity dies. The gap is easy to adjust to the optimal state, and the single-point force-bearing method greatly reduces the impact and wear on the cutting edge, thus extending the die life by several times. They are especially suitable for cutting fragile thin materials. The entire process, from feeding the whole piece of material to producing a single product, is fully automated without human intervention, resulting in high production efficiency. Furthermore, it can quickly adapt to different product layouts by modifying the PLC program, demonstrating a high degree of flexibility. Operators are completely away from the stamping area and only come into contact with the equipment when loading and unloading materials, thus completely eliminating the safety risks of traditional manual stamping. Attached Figure Description

[0016] Fig. 1 This is a schematic diagram of the overall structure of the cutting device of the present invention; Fig. 2 This is a flowchart of the cutting method of the present invention.

[0017] In the diagram: 1. Track; 2. Y-axis motor module; 3. Stop button; 4. Diaphragm initial positioning platform; 5. Gripper mechanism; 6. Cutter; 7. Cutting mold; 8. Floating joint; 9. Z-axis cylinder; 10. Control panel; 11. Start button; 12. X-axis motor module. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1, such as Figs. 1-2 As shown, this embodiment provides an automatic cutting device for small speaker diaphragms based on coordinate positioning, including a frame; two parallel tracks 1 arranged on the frame; two Y-axis motor modules 2, respectively disposed inside the two tracks 1; an X-axis motor module 12, which is horizontally spanned and slidably mounted on the two Y-axis motor modules 2 and the tracks 1; a positioning platform 4, connected to the X-axis motor module 12, driven by the X-axis motor module 12 and the Y-axis motor module 2 to move two-dimensionally in the horizontal plane, used to carry whole sheets of diaphragms arranged in multiple rows and columns; and a gripper mechanism 5, disposed on the frame. The positioning platform 4 or the frame adjacent to the positioning platform 4 is used to grip and fix the film at the cutting station; the cutting unit is set at a fixed position above the positioning platform 4, including the cutter 6 and the cutting mold 7; the Z-axis drive mechanism is mounted on the frame and connected to the cutting mold 7, used to drive the cutting mold 7 and the cutter 6 to perform cutting actions in the vertical direction; the control unit includes a PLC and a control panel 10. The PLC is electrically connected to the Y-axis motor module 2, the X-axis motor module 12, the gripper mechanism 5 and the Z-axis drive mechanism, used to control the coordinated action of each mechanism.

[0020] The Z-axis drive mechanism is a Z-axis cylinder 9, and the cutting die 7 is connected to the piston rod of the Z-axis cylinder 9 through a floating joint 8; a start button 11 and a stop button 3 are provided on the front side of the positioning platform 4; the gripper mechanism 5 is located on opposite sides of the positioning platform 4.

[0021] Secondly, the present invention provides an automatic cutting method for small speaker diaphragms based on coordinate positioning.

[0022] This method, using the aforementioned device, includes the following steps: S1. Feeding and initial positioning: Place the completed multi-row, multi-cavity molded membrane sheet onto the positioning platform 4 and perform overall positioning. S2, Coordinate matrix setting: Preset in the PLC or generate a two-dimensional coordinate matrix corresponding to each cut acupoint on the whole membrane based on the visual recognition result; S3. Sequential movement and hole-by-hole cutting: The PLC controls the Y-axis motor module 2 and X-axis motor module 12 to drive the positioning platform 4 to move according to the order of the coordinate matrix, and sequentially and accurately transports each hole to be cut to the fixed cutting station below the cutting unit. For each acupoint that reaches the cutting station: S31. Control the action of the gripper mechanism 5 to clamp the diaphragm on the positioning platform 4; S32. Control the Z-axis drive mechanism to drive the cutting mold 7 and the cutter 6 to complete a single punching of the acupoint. S33, control the Z-axis drive mechanism to reset, and then control the gripper mechanism 5 to release; S4. Loop and complete. Repeat step S3 until all acupoints in the coordinate matrix have been cut to obtain separate individual membrane products.

[0023] The diaphragm is a polyester plastic film with a thickness between 0.02 mm and 0.07 mm.

[0024] In step S32, the cutting die 7 is connected to the Z-axis cylinder 9 that drives it via a floating joint 8, so as to adaptively fine-tune the alignment during cutting.

[0025] Specifically, the automatic cutting device of the present invention includes a robust frame, two high-precision parallel guide rails fixed on the worktable of the frame as rails 1, the bases of two Y-axis servo motor modules 2 are respectively installed on the rails 1, and can slide precisely along the Y direction. The X-axis servo motor module 12 is fixed to the moving sliders of the two Y-axis motor modules 2 through the connecting seats at both ends, and is thus driven by the Y-axis module 2. The X-axis motor module 12 itself can drive its slider to move along the X direction. The positioning platform 4 is fixed on the slider of the X-axis motor module 12 by the mounting plate. Therefore, the positioning platform 4 can perform CNC movement in both X and Y directions, and the positioning accuracy can reach ±0.01mm. The surface of the positioning platform 4 can be provided with a vacuum adsorption area or mechanical positioning pins for quick fixation of the entire diaphragm. The front edge of the platform is equipped with a start button 11 and an emergency stop button 3. A pair of pneumatic grippers constitute the gripper mechanism 5, which is symmetrically mounted on independent supports on the left and right sides of the positioning platform 4. Its opening and closing are controlled by PLC. The cutting unit is mounted on an integrated crossbeam on the upper part of the frame, located directly above the movement range of the positioning platform 4. The cutting unit includes an upper die (cutting blade 6) and a lower die (cutting mold 7). The lower die is connected to the piston rod end of the Z-axis cylinder 9 through a floating joint 8. The Z-axis cylinder 9 is vertically fixed on the crossbeam. The control panel 10 integrates PLC, touch screen, driver and electrical interface.

[0026] Method Implementation Examples: The method for automatically cutting small speaker diaphragms using the above-mentioned equipment includes the following steps: Step 1: The operator places a whole product containing, for example, 20 membrane units in 4 rows and 5 columns on the positioning platform 4, and positions it by the corners or starts vacuum adsorption to complete the initial overall positioning. After closing the safety door, the operator presses the start button 11. Step 2: The PLC calls the pre-stored cutting coordinate matrix corresponding to the product model. This matrix defines the (X, Y) coordinates of the center of each acupoint on the whole piece relative to the mechanical origin of the equipment. Alternatively, the coordinate matrix can be automatically identified and generated during the first production by installing a vision system. Step 3: The PLC enters automatic cycle: a) Based on the first coordinate point in the coordinate matrix, control the Y-axis and X-axis motor modules to move together and accurately move the first acupoint on the positioning platform 4 to the fixed cutting point directly below the cutter 6; b) Once the position is reached, the PLC sends a signal to control the two gripper mechanisms 5 to move simultaneously and firmly clamp the diaphragm from both sides. c) After clamping, the PLC controls the Z-axis cylinder 9 to descend rapidly. The floating joint 8 allows the cutting die 7 to generate a slight self-adjustment when it contacts the diaphragm, ensuring that the upper and lower dies are parallel and fit together to complete the precise punching. Then, the Z-axis cylinder 9 immediately retracts. d) After the cylinder returns to its original position, the gripper mechanism 5 releases. Step 4: The PLC controls the positioning platform 4 to move to the next acupoint coordinate in the coordinate matrix, and repeats the clamping, punching, and releasing process in Step 3. Step 5: Repeat this process until all 20 coordinate points in the coordinate matrix have been cut. The equipment will then stop, and the operator can remove the 20 separated individual membrane products and place a new whole sheet inside to begin the next cycle.

[0027] Throughout the process, single-point cutting ensures that the force is concentrated and uniform during each punching. The design of the floating joint 8 effectively compensates for the cumulative error of the equipment and installation error, and protects the expensive precision cutting die. This method is particularly suitable for ultra-thin polyester film of 0.02-0.07mm, which minimizes the wear of the die while ensuring a perfect cut.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic cutting device for small speaker diaphragms based on coordinate positioning, characterized in that, include: frame; Two parallel rails (1) are set on the frame. Two Y-axis motor modules (2) are respectively located on the inner sides of the two tracks (1); The X-axis motor module (12) is mounted across and slidably on the two Y-axis motor modules (2) and the track (1); The positioning platform (4) is connected to the X-axis motor module (12) and is driven by the X-axis motor module (12) and the Y-axis motor module (2) to move in two dimensions in the horizontal plane, and is used to carry the whole sheet of diaphragm arranged in multiple rows and columns. The gripper mechanism (5) is set on the positioning platform (4) or on the frame adjacent to the positioning platform (4) for gripping and fixing the film at the cutting station; The cutting unit is set at a fixed position above the positioning platform (4) and includes a cutter (6) and a cutting mold (7). The Z-axis drive mechanism is mounted on the frame and connected to the cutting mold (7) to drive the cutting mold (7) and the cutter (6) to perform cutting actions in the vertical direction; The control unit includes a PLC and a control panel (10). The PLC is electrically connected to the Y-axis motor module (2), the X-axis motor module (12), the gripper mechanism (5), and the Z-axis drive mechanism, and is used to control the coordinated operation of each mechanism.

2. The automatic cutting device for small speaker diaphragms based on coordinate positioning according to claim 1, characterized in that, The Z-axis drive mechanism is a Z-axis cylinder (9), and the cutting die (7) is connected to the piston rod of the Z-axis cylinder (9) through a floating joint (8).

3. The automatic cutting device for small speaker diaphragms based on coordinate positioning according to claim 1, characterized in that, The positioning platform (4) is equipped with a start button (11) and a stop button (3) on the front side.

4. The automatic cutting device for small speaker diaphragms based on coordinate positioning according to claim 1, characterized in that, The gripper mechanism (5) is located on opposite sides of the positioning platform (4).

5. An automatic cutting method for small loudspeaker diaphragms based on coordinate positioning, using the automatic cutting equipment for small loudspeaker diaphragms based on coordinate positioning described in 1-4, characterized in that, Includes the following steps: S1. Loading and initial positioning: Place the completed multi-row multi-cavity film on the positioning platform (4) and perform overall positioning. S2. Coordinate matrix setting: A two-dimensional coordinate matrix corresponding to each cut acupoint on the whole membrane is preset in the PLC or generated according to the visual recognition result. S3. Sequential movement and hole-by-hole cutting: The PLC controls the Y-axis motor module (2) and X-axis motor module (12) to drive the positioning platform (4) to move according to the order of the coordinate matrix, and sequentially and accurately delivers each hole to be cut to the fixed cutting station below the cutting unit. For each acupoint that reaches the cutting station: S31. Control the action of the gripper mechanism (5) to clamp the diaphragm on the positioning platform (4); S32. Control the Z-axis drive mechanism to drive the cutting mold (7) and the cutter (6) to complete a single punching of the acupoint; S33. Control the Z-axis drive mechanism to reset, and then control the gripper mechanism (5) to release; S4. Loop and complete. Repeat step S3 until all acupoints in the coordinate matrix have been cut to obtain separate individual membrane products.

6. The automatic cutting method for a small loudspeaker diaphragm based on coordinate positioning according to claim 5, characterized in that, The diaphragm is a polyester plastic film with a thickness between 0.02 mm and 0.07 mm.

7. The automatic cutting method for a small loudspeaker diaphragm based on coordinate positioning according to claim 5, characterized in that, In step S32, the cutting die (7) is connected to the Z-axis cylinder (9) that drives it via a floating joint (8) to adaptively fine-tune the alignment during cutting.

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