Processing method of FPC seamless plate and FPC plate

Abstract

The application belongs to the technical field of flexible circuit boards, and discloses a processing method of FPC seamless plate arrangement and an FPC board. The application implements zero-spacing seamless plate arrangement on the straight edge of the PCS by utilizing the characteristics of the straight edge of the FPC; the profile between the two PCS is punched out at one time by a carving cutter; and the punched FPC is applied to the manufacture of electronic products. The application improves the utilization rate of the material, reduces the material cost of the product, reduces the difficulty of waste treatment, and is more friendly to the environment. The FPC plate arrangement spacing of the application is adjusted from the traditional 2-3 mm to 0 spacing, which meets the profile requirements of the customer and realizes material saving.

Description

Technical Field

[0001] This invention belongs to the field of flexible circuit board technology, and particularly relates to a processing method for seamless FPC layout and an FPC board. Background Technology

[0002] FPC (Flexible Printed Circuit) shapes are formed by mechanical stamping using molds. Since the minimum width of the mold punch is approximately 0.7-1mm, at least 2mm-3mm of scrap material must be reserved between the rows of PCS. For example... Figure 1 A layout diagram of existing PCS (Polymer Components) technology; Based on the above analysis, the problems and shortcomings of the existing technology are as follows: the waste between the panels limits the further improvement of material utilization. Summary of the Invention

[0003] To overcome the problems existing in related technologies, the present invention discloses a processing method for seamless FPC panel layout and an FPC board.

[0004] The technical solution is as follows: A method for processing seamless FPC panels, the method comprising the following steps: S1 utilizes the straight edge characteristics of FPC to implement zero-gap seamless layout of PCS straight edges; S2, the shape between the two PCS is punched out in one go using a carving die; S3 will enable the application of FPC in electronic product manufacturing.

[0005] In step S2, the engraving die includes: (1) Blade shape: The blade of the blade module is designed as a 40° blade with an inner straight and outer bevel; (2) Integrated waste removal structure: The waste discharge trough at the bottom is linked with the pusher block mechanism, which automatically pushes the waste away from the die after punching; (3) High rigidity blade base material: 8mm-10mm thick mold steel is used for one-piece engraving.

[0006] In step (1), designing the blade of the blade module as a 40° inner straight and outer bevel blade includes: Step 1, Iterative model of blade angle; based on material tensile strength with the angle of the blade Based on the relationship, establish the critical tear angle formula; Step 2: Optimize cutting edge geometry parameters; introduce a cutting edge sharpening factor. Ensure that the bevel does not weaken the strength of the cutting edge; Step 3: Dynamic punching simulation verification.

[0007] In step 1, the formula for the critical tear angle is: In the formula, The critical tear angle, For FPC shear strength, The coefficient of friction between the blade and the material. This refers to the tensile strength of the material.

[0008] In step 2, the edge sharpening factor for: In the formula, For FPC thickness, For the angle of the blade, The elastic modulus of the cutting tool. This is the elastic modulus of the material.

[0009] In step 3, the dynamic punching simulation verification is performed by establishing a material separation energy model through finite element analysis, the expression of which is: In the formula, To separate energy from materials, The torque is in the vertical direction. The torque is in the horizontal direction. For the total torque, For FPC surface energy, This represents the area of ​​the cut.

[0010] In step S2, punching out the shape between the two PCS in one go using the engraving die includes: a method of controlling the engraving die to punch out the shape between the two PCS in one go using the control system, specifically: (a) Dynamic pressure envelope control; (b) Thermal expansion and spacing compensation control; (c) Flexible damping reset control.

[0011] In step (a), dynamic pressure envelope control includes: Based on the depth of the blade entering the material Real-time adjustment of hydraulic / servo axis output pressure The expression is: In the formula, For the blade to enter the material Pressure at depth, The initial pressure of the blade. The material hardening coefficient, Total material thickness; In step (b), thermal expansion and spacing compensation control includes: The sensor monitors the temperature T of the narrow beam between the two PCS die in real time. The system automatically fine-tunes the next position Z of the punch press to compensate for the die expansion caused by frictional heat. The expression is: In the formula, To compensate for thermal expansion and spacing distance, The length of the blade. The coefficient of thermal expansion of steel. This is the reference temperature.

[0012] In step (c), the flexible damping reset control includes: using the back electromotive force of the servo motor to simulate a damper, preventing the instantaneous release of the ejection spring from causing secondary damage to the PCS cut, as expressed in the following expression: In the formula, The instantaneous speed on the return journey. The elastic coefficient, It is an exponential decay factor. For compression amount, For equivalent quality, This represents the total thickness of the material.

[0013] Another object of the present invention is to provide an FPC board manufactured using the aforementioned FPC seamless panel fabrication method.

[0014] Combining all the above technical solutions, the beneficial effects of this invention are as follows: This invention utilizes the characteristic of some straight edges of FPCs to achieve zero-gap seamless layout of PCS straight edges. Using a single engraving die, the outline between two PCSs is punched out in one go, reducing the complexity of the mold. This invention improves material utilization, reduces product material costs, and also reduces the difficulty of waste disposal, making it more environmentally friendly. The FPC layout spacing of this invention has been adjusted from the traditional 2-3mm to zero spacing, achieving material savings while meeting customer shape requirements. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the disclosure of this invention and, together with the description, serve to explain the principles of this disclosure; Figure 1 A layout diagram of existing PCS (Polymer Components) technology; Figure 2 This is a diagram illustrating the seamless, zero-gap layout effect of PCS with straight edges provided by this invention. Figure 3This is a rendering of the FPC seamless panel processing method provided by the present invention. Figure 4 This is a flowchart of the processing method for seamless FPC panel layout provided by the present invention.

[0016] Figure 5 This is a block diagram of the core mechanical structure of the engraving die provided by the present invention; In the diagram: 1. Main body of the blade; 101. Upper blade; 102. Lower blade; 2. Blade module; 3. Waste removal system; 301. Waste discharge trough; 302. Pushing block; 4. Elastic unloading device; 401. Unloading block; 402. Spring assembly; 5. Positioning and guiding structure; 501. Positioning pin; 502. Guide post and guide sleeve. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Example 1: This invention utilizes the characteristic of some straight edges of FPCs to achieve seamless zero-gap layout of PCS straight edges. Using a single engraving die, the outline between two PCSs is punched out in one go, reducing the complexity of the mold. Figure 2 As shown; Figure 3 This is a rendering of the effect after processing the FPC seamless panel method provided by the present invention.

[0019] Specifically, such as Figure 4 The processing method for seamless FPC panel provided by the present invention includes: S1 utilizes the straight edge characteristics of FPC to implement zero-gap seamless layout of PCS straight edges; S2, the shape between the two PCS is punched out in one go using a carving die; S3 will enable the application of FPC in electronic product manufacturing.

[0020] For example, step S2, engraving the die, includes: (1) Blade shape: The blade of the blade module 2 is designed to be straight inside and oblique outside at 40°. As can be seen, the conventional straight blade has been changed to a 40° blade with an inner straight and outer bevel, which is suitable for ultra-thin and flexible FPC materials and reduces punching and pulling. The inner straight structure ensures a vertical and flat cut, while the outer bevel design reduces the friction between the blade surface and the material, avoiding material smudging and burrs.

[0021] (2) Integrated waste removal structure: A new waste discharge groove 301 at the bottom is linked with the pusher block 302, which automatically pushes the waste away from the die after punching. No manual cleaning of the die is required, which solves the problems of slow waste discharge and easy material jamming in traditional die-cutting.

[0022] (3) High rigidity blade substrate: It is made of 8-10mm thick mold steel and is engraved in one piece, which increases the rigidity by more than 3 times compared with etched molds. The blade is not easily deformed during pressing, which is suitable for the precise punching requirements of zero-gap layout.

[0023] For example, the optimization of engraving die-cutting process parameters includes: Upgraded machining accuracy: controlling die-cutting accuracy within ±0.03mm, with a minimum blade spacing of 0.6mm. Adapting to fine-pitch punching for FPC zero-pitch layouts, meeting precision machining requirements with a tolerance ≤0.25mm. Blade hardness adjustment: increasing blade hardness to HRC54-60, achieving a single-cutting life of 100-20000 cycles, supporting 3 re-sharpening and reuse. Flexible blade height adaptation: customizable blade height from 0.5-6mm, allowing adjustment of cutting depth for FPC materials of different thicknesses.

[0024] The engraving die of this invention has the following advantages: Seamless layout adaptation: High precision and narrow blade spacing ensure that FPC units arranged with zero spacing do not misalign or stick together. Improved processing efficiency: Automatic waste removal structure reduces downtime for cleaning, extends die life, and reduces die change frequency. Guaranteed product yield: The inner straight and outer beveled blade design reduces FPC material stretching and deformation, resulting in smooth, burr-free cuts and lower defect rate.

[0025] For example, in the engraving die, the blade of the blade module 2 is designed as a 40° inward and outward angled blade. The mechanical basis and core issues of the blade design include: FPC punching failure mechanism: FPC material has high ductility (thickness is usually ≤0.1mm). Traditional straight blades (90° vertical) have two major problems during punching: material tensile deformation: when the blade is pressed down, the material flows along the side of the blade edge, generating tensile stress, resulting in edge burrs or micro-cracks; increased peeling resistance: after punching, the waste material has a large contact area with the blade edge, and the risk of adhesion is high, requiring additional waste removal force.

[0026] Mechanical advantages of beveled design: Minimization of lateral force: The 40° outward bevel of the blade can decompose the impact force into a vertical component (cutting-dominant) and a lateral component (material displacement).

[0027] Specifically, this includes: Step 1: Iterative model of blade angle; Based on material tensile strength with the angle of the blade Based on the relationship, establish the formula for the critical tear angle: In the formula, The critical tear angle, The shear strength of FPC (measured average value ≈ 15 MPa). The coefficient of friction between the blade and the material (polished steel to polyimide ≈ 0.1). This represents the tensile strength of the material (typical value ≈ 200 MPa). Calculations show that... 40° was selected as the optimal solution with a safety margin.

[0028] Step 2: Optimize cutting edge geometry parameters; introduce a cutting edge sharpening factor. Ensure that the bevel does not weaken the cutting edge strength: In the formula, For FPC thickness (0.05-0.1mm), For the angle of the blade, The elastic modulus of the cutting tool. The elastic modulus of the material is (tool steel ≈ 210 GPa, FPC ≈ 2.5 GPa).

[0029] hour, (Requirement > 0.1), verify the feasibility of the 40° design.

[0030] Step 3: Dynamic punching simulation verification; Establishing a material separation energy model through finite element analysis: In the formula, To separate energy from materials, The torque is in the vertical direction. The torque is in the horizontal direction. For the total torque, The surface energy of the FPC is approximately 0.5 J / m². 2 ), This represents the area of ​​the cut.

[0031] Compared to a straight blade (lateral force ≈ 0), a 40° bevel angle significantly reduces lateral material displacement. Stress concentration optimization: an inner straight wall (90°) ensures cut perpendicularity, while an outer bevel angle (40°) reduces the contact area between the cutting edge and the material, lowering the punching pressure and preventing material tearing. Simulations show that a 40° bevel angle reduces separation energy by 25% compared to a straight blade and eliminates the plastic deformation zone. The optimality of the 40° bevel angle is verified; comparative experimental data are shown in Table 1. Table 1 compares experimental data, which are from FPC mass production punching tests (thickness 0.1mm). Minimum Energy Principle: A 40° tilt angle reduces separation energy. Approaching the theoretical fracture energy of materials; Tool life equation: Among them, contact stress The tear angle is reduced by 30% at 40°. As can be seen from the above embodiments, this invention proposes an angle-strength coupling model; it determines the critical tear angle of the material. With edge sharpening factor Solve simultaneously, replacing the traditional trial-and-error method.

[0032] Dynamic energy optimization algorithm: through energy separation Minimizing this directly relates to angle parameters and cut quality. Compatible with waste removal design: a 40° outward bevel angle naturally forms a waste removal channel; the 40° inward and outward bevel cutter edge reduces load through mechanical decomposition (lateral force reduced by 36%) and optimizes geometric parameters (…). ), and dynamic energy control ( With a 25% reduction in costs, this triple innovation has become the optimal solution for cutting ultra-thin FPC materials.

[0033] For example, in step S2, the shape between two PCS is punched out in one go using an engraving die. The method of controlling the engraving die to punch out the shape between two PCS in one go using the control system includes: (a) Dynamic pressure envelope control; The system no longer uses constant pressure, but instead adjusts the pressure based on the depth the blade penetrates the material. The output pressure P of the hydraulic / servo axis is adjusted in real time.

[0034] In the formula, For the blade to enter the material Pressure at depth, The initial pressure of the blade. The material hardening coefficient, The total thickness of the material; at the moment of cutting ( Provides high-pressure fracturing force during the extremely small (small) penetration stage ( Rapidly reduce pressure to prevent violent vibrations during a single ejection.

[0035] (b) Thermal expansion and spacing compensation control; The sensor monitors the temperature T of the die beam between the two PCS in real time, and the system automatically adjusts the next position Z of the punch press to compensate for the die expansion caused by frictional heat.

[0036] In the formula, To compensate for thermal expansion and spacing distance, The length of the blade. The coefficient of thermal expansion of steel. The reference temperature is 20°C or 25°C.

[0037] Ensure that the apex of the 40° beveled edge always falls at the designed absolute zero position during continuous stamping to avoid spacing drift. Zero point calibration: This is the zero point of displacement compensation. When the real-time temperature T measured by the sensor equals... At that time, the formula calculated This indicates that the die-cutting mold is in its designed state and no positional correction is needed. Calculation of the change: The core of the formula is calculating the temperature difference. Because the die-cutting mold generates intense heat due to friction during continuous high-frequency stamping, the metal expands due to heat. The system must calculate the temperature rise relative to the initial state in order to accurately deduce the elongation of the die body in the vertical direction.

[0038] Dynamic feedback: The control system compares T with... The difference drives the servo motor to perform micron-level compensation on the bottom dead center (Z-axis) to offset the deviation in pressing depth caused by the heating and elongation of the 40° oblique blade.

[0039] (c) Flexible damping reset control; The return speed of the ejection unit after punching is controlled. The reverse electromotive force of the servo motor is used to simulate a damper to prevent the instantaneous release of the ejection spring from causing secondary damage to the PCS cut.

[0040] In the formula, The instantaneous speed on the return journey. The elastic coefficient is the stiffness of the spring or flexible element in the unloading mechanism, which determines the system's ability to store initial potential energy. It is an exponential decay factor. For compression amount, It is the square of the compression, that is, the physical displacement of the ejector spring when the stamping reaches its maximum depth. The square of this, together with K, constitutes the initial elastic potential energy of the system. . The equivalent mass includes the total mass of the ejector plate, the controlled module, and the servo components. The greater the mass, the stronger the inertia, and the slower the speed change. (Square digit) In fact, it is the initial maximum return velocity derived from the law of conservation of energy (i.e., the theoretical velocity when damping is ignored). It is a damping factor that simulates a damping effect through servo control, allowing the material ejection action to smoothly transition from high-speed start-up to zero-speed stop. This design effectively solves the problem of edge burrs or displacement caused by the material's violent rebound due to the spring after the material is ejected once between two pieces.

[0041] It is evident that this control method has changed the traditional blind pressure mode. Through pressure adaptation and position compensation, the spacing error between two PCS is reduced from ±0.1mm to ±0.03mm, directly eliminating the secondary edge cleaning process and improving production efficiency by 30%.

[0042] Example 2, exemplary, such as Figure 5 The specific core mechanical structure of the engraving die; (1) The main body of the blade 1 includes: 8-10mm thick mold steel (such as SKD11), integrally engraved to ensure high rigidity. The structure is that the blade is divided into upper and lower parts: Upper blade 101: fixed blade module 2, with reserved positioning holes and waste discharge channels. Lower blade 102: integrates elastic ejection device 4 and waste removal system 3, connected to the upper blade 101 through precision guide pillars to ensure perpendicularity during punching.

[0043] (2) Blade Module 2; Blade Design: 40° inner straight edge and outer bevel: The inner straight edge ensures a vertical cut, and the outer bevel reduces friction. The blade thickness is 0.3mm, and the minimum spacing is 0.6mm. Replaceable Blade: Blade Module 2 is fixed with bolts and can be quickly replaced after wear without requiring overall mold repair. Blade Height Adjustment: The blade height (0.5-6mm) can be adjusted using shims to adapt to different thicknesses of FPC.

[0044] The waste removal system 3 includes: a waste discharge trough 301 at the bottom: the trough is 1.5mm deep and 0.2mm wider than the blade spacing to ensure smooth waste discharge. The bottom of the trough is designed with a 15° taper, which, together with the waste suction device (optional vacuum pump), accelerates waste discharge. A pusher block 302: located inside the waste discharge trough 301, is connected to the blade body by a spring, and automatically pops out during punching to push the waste away from the die.

[0045] The flexible ejector device 4 includes: an ejector block 401 made of polyurethane (hardness 65°), 0.1 mm narrower than the blade spacing and 0.5 mm higher than the blade. It is machined using slow wire EDM to ensure precise fit with the blade. A spring assembly 402 is mounted at the bottom of the blade body, providing uniform pressure (5-10 N) to prevent the FPC from shifting during punching.

[0046] Positioning and guiding structure 5; including: positioning pins 501: Φ2mm positioning pins are set at the four corners of the blade, which cooperate with the positioning holes of the bottom die, with a repeatability positioning accuracy of ±0.02mm. Guide post and guide sleeve 502: The upper and lower blades are connected by Φ8mm guide posts, with a guiding gap of 0.01mm, to ensure perpendicularity during punching.

[0047] For example, the function of the inner straight and outer bevel cutting edge technology is as follows: the inner straight edge ensures that the FPC cut is perpendicular, while the outer bevel reduces the contact area between the cutting edge and the material, reducing friction and avoiding material smearing and burrs. Compared with the traditional method: traditional straight-blade dies are prone to pulling on the FPC, causing cut deformation; the outer bevel design makes the cutting force more concentrated, improving the smoothness of the cut by 30%.

[0048] The integrated waste removal structure technology functions as follows: the pusher block 302 and the waste discharge trough 301 are linked to automatically remove waste after punching, reducing downtime. Compared to the traditional method: traditional die-cutting requires manual waste removal, taking 2-3 minutes per batch; the new structure only takes 30 seconds, increasing efficiency by 4 times.

[0049] The high-rigidity blade technology: The rigidity of the one-piece engraved blade is more than three times that of the etched die, with deformation of less than 0.01mm during punching, meeting the requirements for zero-pitch layout accuracy. In contrast, traditional etched dies, due to their multi-layered structure, lack sufficient rigidity and are prone to punching misalignment.

[0050] The function of the flexible ejector device: The ejector block 401 contacts the FPC before the blade, fixing the material before punching, thus preventing material displacement or deformation. In contrast to traditional methods: Without an ejector device, the FPC is prone to warping due to the punching force, leading to tolerance exceeding limits.

[0051] Structural Coordination Working Principle; Punching Process: The positioning pin is inserted into the positioning hole of the bottom die, and the guide post and guide sleeve ensure perpendicularity. The punch press presses down, and the ejector block 401 first contacts and fixes the FPC, then the blade punches the material. After punching, the pusher block 302 pops out, and the scrap slides into the waste discharge groove 301 and is sucked away. The punch press rises, the ejector block 401 resets, and it is ready for the next punching. Precision Guarantee: High-rigidity blade body reduces punching deformation. Positioning pins and guide posts and guide sleeves ensure repeatability and positioning accuracy. Elastic ejection device prevents material displacement. Efficiency Improvement: Automatic waste discharge reduces downtime. Replaceable blades extend die life and reduce die change frequency.

[0052] For example, the new die-cutting mold adopts a modular, layered structure, consisting of three core modules: the main body of the die, the waste removal system, and the elastic material ejection unit. Each module is rigidly connected by precision guide pillars and bolts, and the entire system is designed, modeled, and its feasibility verified using Solidworks software.

[0053] Blade body 1, high rigidity base layer: made of 8-10mm mold steel in one piece to ensure that the blade does not deform during the pressing process.

[0054] Blade Module 2: 40° inner straight and outer bevel design, blade hardness HRC54-60, and die precision controlled within ±0.03mm.

[0055] Positioning system (positioning and guiding structure 5): Φ2mm positioning pins are set at the four corners, which cooperate with the positioning holes of the bottom mold to achieve a repeatability positioning accuracy of ±0.02mm.

[0056] Waste removal system 3; Waste discharge channel: The bottom is equipped with a waste discharge trough 301 with a 15° tapered groove and a depth of 1.5mm. The width is 0.2mm larger than the blade spacing. It works in conjunction with a vacuum waste suction device to automatically discharge waste.

[0057] Pusher block 302: It adopts a spring automatic reset design. After punching, it pops out to push the waste material away from the die and avoids jamming.

[0058] The ejector block 401 of the elastic ejector device 4 is made of polyurethane with a hardness of 65°. Its width is 0.1mm narrower than the blade spacing, and its height is 0.5mm higher than the blade. The buffer spring provides a uniform pressure of 5-10N to ensure that the FPC does not warp or shift during punching.

[0059] Example 3, exemplarily, the operation process of engraving a die includes: Step 1. Die setting and adjustment; Precision calibration: Use a micrometer to measure the distance error between the die and the bottom die and control it within 0.03mm; Pressure adjustment: Set the punching pressure to 50-100kg and adjust it to the optimal pressing state through trial cutting; Step 2. Punching operation; Loading and positioning: Align the layout FPC with the die reference line, with a positioning accuracy error ≤ 0.05mm; Batch punching: Control the punching time of each batch to 2-3 seconds, and set the continuous operation cycle to 10 minutes / batch; Automatic waste removal: Use the die pusher block to simultaneously remove waste material, and only 30 seconds are needed to clean up the remaining material after each batch is completed; Step 3. Quality control; First piece inspection: Confirm key indicators such as cut perpendicularity, spacing accuracy, and absence of burrs; In-process sampling inspection: Select 1 piece out of every 500 pieces to check the punching quality and record the die wear; Step 4. Die maintenance; Regular maintenance: Clean residual adhesive residue from the die surface every 10 hours of operation and apply rust-preventive oil to protect the blade; Re-sharpening and reuse: When the blade height wears down to 0.3mm, perform professional re-sharpening. A single re-sharpening can restore 80% of the punching accuracy. For example, punching parameters for FPCs of different thicknesses are shown in Table 2.

[0060] Table 2 Thickness Compatibility Table Special material parameter adjustments: FPC with 3M 9471# adhesive backing: blade height increased by 0.05mm, pressure increased by 10%; 35um copper thickness double-sided board: minimum die spacing ≥0.8mm to avoid copper foil stretching and deformation; exemplary die selection schemes for different FPC types; (1) High-density copper foil FPC; Selection focus: minimum blade spacing 0.6-0.8mm, blade hardness ≥HRC58; Applicable scenarios: mobile phone motherboard FPC, precision camera FPC; (2) Multi-layer flexible FPC; Selection focus: Add anti-stick coating on both sides of the blade, blade edge angle 35; Applicable scenarios: wearable device FPC, medical implant device FPC; (3) FPC with reinforcing steel sheet; Selection focus: minimum blade height 1.5mm, blade spacing ≥0.8mm; Applicable scenarios: vehicle central control FPC, industrial equipment FPC.

[0061] Example 4: The present invention provides an FPC (flexible printed circuit board) punched out using a processing method of seamless FPC layout.

[0062] 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 modifications, equivalent substitutions and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention and within the spirit and principles of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for processing seamless FPC panels, characterized in that, The processing method includes the following steps: S1 utilizes the straight edge characteristics of FPC to implement zero-gap seamless layout of PCS straight edges; S2, the shape between the two PCS is punched out in one go using a carving die; S3 will enable the application of FPC in electronic product manufacturing.

2. The processing method for seamless FPC panel according to claim 1, characterized in that, In step S2, the engraving die includes: (1) Blade shape: The blade of the blade module (2) is designed to be straight inside and oblique outside at 40°. (2) Integrated waste removal structure: A new waste discharge trough (301) and push block (302) linkage mechanism are added at the bottom, which automatically pushes the waste away from the die after punching; (3) High rigidity blade base material: 8mm-10mm thick mold steel is used for one-piece engraving.

3. The processing method for seamless FPC panel according to claim 2, characterized in that, In step (1), designing the blade of the blade module (2) as a 40° inner straight and outer bevel blade includes: Step 1, Iterative model of blade angle; based on material tensile strength with the angle of the blade Based on the relationship, establish the critical tear angle formula; Step 2: Optimize cutting edge geometry parameters; introduce a cutting edge sharpening factor. Ensure that the bevel does not weaken the strength of the cutting edge; Step 3: Dynamic punching simulation verification.

4. The processing method for seamless FPC panel according to claim 3, characterized in that, In step 1, the formula for the critical tear angle is: In the formula, The critical tear angle, For FPC shear strength, The coefficient of friction between the blade and the material. This refers to the tensile strength of the material.

5. The processing method for seamless FPC panel according to claim 3, characterized in that, In step 2, the edge sharpening factor for: In the formula, For FPC thickness, For the angle of the blade, The elastic modulus of the cutting tool. This is the elastic modulus of the material.

6. The processing method for seamless FPC panel according to claim 3, characterized in that, In step 3, the dynamic punching simulation verification is performed by establishing a material separation energy model through finite element analysis, the expression of which is: In the formula, To separate energy from materials, The torque is in the vertical direction. The torque is in the horizontal direction. For the total torque, For FPC surface energy, This represents the area of ​​the cut.

7. The processing method for seamless FPC panel according to claim 1, characterized in that, In step S2, punching out the shape between the two PCS in one go using the engraving die includes: a method of controlling the engraving die to punch out the shape between the two PCS in one go using the control system, specifically: (a) Dynamic pressure envelope control; (b) Thermal expansion and spacing compensation control; (c) Flexible damping reset control.

8. The processing method for seamless FPC panel according to claim 7, characterized in that, In step (a), dynamic pressure envelope control includes: Based on the depth of the blade entering the material Real-time adjustment of hydraulic / servo axis output pressure The expression is: In the formula, For the blade to enter the material Pressure at depth, The initial pressure of the blade. The material hardening coefficient, Total material thickness; In step (b), thermal expansion and spacing compensation control includes: The sensor monitors the temperature T of the narrow beam between the two PCS die in real time. The system automatically fine-tunes the next position Z of the punch press to compensate for the die expansion caused by frictional heat. The expression is: In the formula, To compensate for thermal expansion and spacing distance, The length of the blade. The coefficient of thermal expansion of steel. This is the reference temperature.

9. The processing method for seamless FPC panel according to claim 7, characterized in that, In step (c), the flexible damping reset control includes: using the back electromotive force of the servo motor to simulate a damper, preventing the instantaneous release of the ejection spring from causing secondary damage to the PCS cut, as expressed in the following expression: In the formula, The instantaneous speed on the return journey. The elastic coefficient, It is an exponential decay factor. For compression amount, For equivalent quality, This represents the total thickness of the material.

10. An FPC board, characterized in that, It is manufactured using the processing method of FPC seamless panel as described in any one of claims 1-9.

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