An apparatus for opening micro-cracks on a panel membrane composite sound absorption panel

Abstract

This invention discloses a microcrack-opening device for a composite sound-absorbing panel, comprising a base, a moving component, a slit-opening component, and a limiting component. A substrate is laid on the base; a horizontal telescopic component is installed on the base, and its horizontal telescopic end is fixed to a support; a support beam is rotatably connected to the support; a torsion spring is sleeved on the support beam, and its two ends are respectively fixed to the support beam and the support; a slit is installed on the support beam; a strip plate is fixed on the base, and its upper surface has a groove; the upper end of an abutment component is connected to the support beam, and the upper surface of the strip plate and the bottom wall of the groove can abut the lower end of the abutment component. This application can open microcracks with small width and short length on a substrate with a large through-hole diameter, and the slit will not scratch the membrane and substrate in non-through-hole locations; the sharp end of the slit will not impact the substrate and the edge of the through-hole during entry and exit; while ensuring the acoustic performance of the composite sound-absorbing panel, the manufacturing cost is significantly reduced.

Description

Technical Field

[0001] This invention relates to the field of sound-absorbing panel manufacturing technology, and more specifically to a slit-opening device for micro-cracks in a sheet-film composite sound-absorbing panel. Background Technology

[0002] Patent CN112497858B, "Composite Sound Absorbing Board with Sheet and Membrane and its Processing Method," proposes to attach a thin film to a substrate with through holes, continuously scribing the surface of the film at the positions corresponding to the through holes, and using the tension of the film to form microcracks. Generally, the through holes of the substrate are periodically distributed in a square or hexagonal lattice, and the spacing between the through holes along the length of the board is equal.

[0003] To create microcracks, current processing methods mainly involve using a scriber to continuously scribble from one end of the substrate to the other, thus cutting open the thin film corresponding to the via location to form microcracks.

[0004] However, the current microcrack processing method has the following five drawbacks: (1) When the scriber is continuously scribbling, the tear slits generated on the film corresponding to the through hole position are transverse to the through hole, that is, the length of the slit is almost the same as the outer diameter of the through hole. Increasing the through hole size can reduce the processing difficulty and manufacturing cost of the through hole, which is conducive to the large-scale promotion and application of the plate-film composite sound-absorbing board; the increase of the through hole size means that the length of the tear slit will also increase accordingly. The larger the slit length, the wider the slit will also increase due to the tension of the film itself. The tear slit with a large slit width cannot provide sufficient sound resistance, and the overall sound impedance of the plate-film composite sound-absorbing board is difficult to match with the characteristic impedance of air, and it is impossible to obtain excellent sound absorption performance. From the perspective of sound absorption performance, the smaller the through hole size on the substrate, the better; from the perspective of processing and manufacturing, the larger the through hole size on the substrate, the better; this is a pair of physical contradictions that are difficult to reconcile. (2) The tear slits generated by continuous scribbling are transverse to the through hole. Due to the influence of film deformation, a single through hole can generally only produce 1 to 2 microcracks. In order to ensure sufficient perforation rate and number of microcracks, the hole spacing of the through holes on the substrate is often reduced, resulting in an increase in the number of through holes. (3) The amount of downward displacement of the cutting tool affects the width of the tear seam generated by the scribing. The smaller the downward displacement, the smaller the tear seam width, and vice versa. In continuous scribing, the horizontal traction force and vertical downward pressure are applied to the cutting tool, and it is generally difficult to control the amount of downward displacement of the cutting tool. (4) Continuous scribing will damage the film at non-through hole positions and will also cause a certain degree of damage to the substrate at non-through hole positions. This will affect the overall mechanical strength, wind pressure resistance and other weather resistance indicators of the structure. (5) When the cutting tool is continuously scribing, the cutting edge will experience an instant drop into the through hole and an instant pull-up from the through hole to the board surface. The instant drop and pull-up will cause a violent collision between the cutting edge and the substrate, which is easy to cause the cutting edge to break and wear.

[0005] Therefore, how to provide a slit-opening device for microcracks on a composite sound-absorbing panel that can overcome the above-mentioned problems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a slit-opening device for microcracks in a composite sound-absorbing panel.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A slit-opening device for microcracks in a composite sound-absorbing panel, the composite sound-absorbing panel comprising a substrate and a thin film attached to one side of the substrate, wherein a plurality of through holes are formed on the surface of the substrate, the plurality of through holes being arranged equidistantly along the length direction of the substrate, including:

[0009] A base platform having a horizontally arranged upper platform, on which the substrate is horizontally laid, and the film is located above the substrate;

[0010] A movable component, comprising a horizontal telescopic member and a bracket, wherein the horizontal telescopic member is mounted on the base and has a horizontal telescopic end, the moving direction of the horizontal telescopic end is the same as the length direction of the substrate, and the bracket is fixed to the horizontal telescopic end.

[0011] A slit-opening assembly includes a support beam, a torsion spring, and a carving knife. The support beam is rotatably connected to the bracket, and the two have a horizontally arranged axis of rotation. The axis of rotation is parallel to the length direction of the support beam, and the length direction of the support beam is perpendicular to the movement direction of the horizontal telescopic end. The torsion spring is sleeved on the support beam, with one end fixed to the support beam and the other end fixed to the bracket. The carving knife is mounted on the support beam, and the end of the carving knife away from the support beam is sharp.

[0012] A limiting component includes a strip plate and an abutment. The strip plate is horizontally arranged and fixed to a base. The length direction of the strip plate is the same as the moving direction of the horizontal telescopic end. The upper surface of the strip plate has multiple grooves, which are arranged equidistantly along the length direction of the strip plate. The upper end of the abutment is connected to the support beam. The upper surface of the strip plate and the bottom wall of the groove can abut the lower end of the abutment. The upper and lower ends of the abutment are arranged sequentially along the moving direction of the horizontal telescopic end. When the abutment abuts the upper surface of the strip plate, there is a gap between the sharp end of the cutting tool and the film. When the abutment abuts the bottom wall of the groove, the sharp end of the cutting tool is located inside the through hole and can cut the film.

[0013] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a slit-opening device for microcracks on a composite sound-absorbing board. This application designs a base platform, allowing the substrate to be reliably arranged, and the moving component, slit-opening component, and limiting component to be reliably mounted on the base platform. In this application, the horizontal telescopic end of the first horizontal telescopic component is fixed to the bracket, the support beam is rotatably connected to the bracket, and a cutting tool is mounted on the support beam. The first horizontal telescopic component can drive the cutting tool to move stably along the length direction of the substrate. This application designs a limiting component, utilizing the periodic distribution pattern of through holes on the substrate... The feature is that a grooved strip plate is provided on the side of the substrate. Utilizing the vertical similarity between the groove on the strip plate and the through-hole on the substrate, the abutment will regularly enter and exit the groove as the support beam moves along the length of the substrate, thus achieving intermittent scribing of the film by the scribing tool. This application adjusts the existing continuous scribing method to an intermittent scribing method, which can process micro-cracks with small slit length and width on the film, thereby enabling the composite sound-absorbing board to achieve superior sound absorption performance. The sharp end of the scribing tool does not... This method reduces wear on the cutting tool and prevents scratches on the substrate surface, thus minimizing impact on the substrate and the edges of the through holes. Most importantly, the design allows for larger through hole diameters while maintaining relatively short micro-crack lengths. This resolves the physical contradiction between maximizing through hole size for ease of processing and minimizing it for superior sound absorption performance, significantly reducing substrate manufacturing costs while maintaining the acoustic performance of the composite sound-absorbing board. Furthermore, the strip plate in this application features multiple evenly spaced grooves, allowing the cutting tool to precisely follow the strip shape. The plate with grooves moves along its trajectory, ensuring the quality and uniformity of micro-crack opening, while also improving opening efficiency. The downward displacement of the cutting tool depends on the groove depth; in this application, the groove depth is constant to ensure opening accuracy. By designing a torsion spring, the torsion spring has the tendency to drive the support beam to rotate. On the one hand, this ensures that the abutment part can always press against the upper surface of the strip plate or the bottom wall of the groove; on the other hand, it gives the sharp end of the cutting tool a certain downward pressure. When the cutting tool corresponds to the through hole and contacts the film, the above-mentioned downward pressure enables the cutting tool to smoothly cut through the film inside the through hole.

[0014] Preferably, both the horizontal telescopic component and the bracket are provided in twos. The horizontal telescopic component includes a mounting base, a lead screw, a nut, and a motor. The two mounting bases are respectively fixed to both sides of the base. Each mounting base has a sliding contact surface. Each mounting base rotatably supports a lead screw, and each lead screw is screwed with a nut. The nut has a sliding contact surface, and the sliding contact surface 1 and the sliding contact surface 2 are slidably in close contact. The bracket is fixed to the nut, and the motor is fixed to the mounting base. The output shaft of the motor is coaxially fixed with the lead screw. The horizontal telescopic component has a simple structure, and the two horizontal telescopic components can reliably drive the support beam to move horizontally.

[0015] Preferably, both ends of the support beam are integrally formed with circular tubes, the length direction of which is the same as the length direction of the support beam. A fixed shaft is integrally formed on the bracket, coaxially inserted into the circular tubes. A torsion spring is coaxially sleeved on the outer side of each circular tube. A first insertion hole is formed on the outer wall of each circular tube, and one end of the torsion spring is inserted into the first insertion hole. A second insertion hole is formed on the outer wall of the bracket, and the other end of the torsion spring is inserted into the second insertion hole. The support beam and the bracket can be reliably rotatably connected, and the torsion springs can be reliably installed and arranged.

[0016] Preferably, the slit assembly further includes a second horizontal telescopic component, which includes a second mounting base, a second lead screw, a second nut, and a second motor. The second mounting base is fixed to the support beam and has a third sliding contact surface. The second lead screw is rotatably supported on the second mounting base, and the length direction of the second lead screw is the same as the length direction of the support beam. Nuts are screwed onto the second lead screw, and one end of the engraving tool is fixed to the second nut. The second nut has a fourth sliding contact surface, and the third sliding contact surface slides tightly against the fourth sliding contact surface. The second motor is fixed to the second mounting base, and the output shaft of the second motor is coaxially fixed with the second lead screw. The second horizontal telescopic component can drive the engraving tool to move along the width direction of the substrate.

[0017] Preferably, the abutment includes a connecting rod and a roller. One end of the connecting rod is fixed to the support beam, and the other end of the connecting rod rotatably supports the roller. The axis of the roller is perpendicular to the length direction of the strip plate. The upper surface of the strip plate and the bottom wall of the groove can roll and abut against the outer wall of the roller. The length direction of the connecting rod is perpendicular to the length direction of the support beam. The connecting rod is inclined relative to the upper surface of the strip plate, and the length direction of the engraving tool is inclined relative to the surface of the substrate. The roller can roll and abut against the upper surface of the strip plate and the bottom wall of the groove. This design can prevent the reduction of slit accuracy due to wear of the strip plate.

[0018] Preferably, two strip plates are provided with their ends aligned, and the substrate is centrally arranged between the two strip plates. The design of the two strip plates ensures that the support beam can reliably reciprocate, thereby driving the scribing tool to smoothly scribble on the film.

[0019] Preferably, the engraving blades are provided in multiple sets, and the multiple sets of engraving blades are arranged equidistantly along the length direction of the support beam. Each set has multiple engraving blades, and the multiple engraving blades are arranged sequentially along the length direction of the support beam. Multiple engraving blades in the same set can simultaneously correspond to a through hole position. The film corresponding to the through hole position can engrave multiple microcracks in a single operation.

[0020] Preferably, the upper surface of the strip plate and the bottom wall of the groove have a smooth transition, and the bottom wall of the groove is parallel to the surface of the strip plate. This allows the rollers to move smoothly in and out of the groove.

[0021] Preferably, the length of the bottom wall of the groove along the length of the strip plate is less than the minimum aperture of the through hole along the length of the substrate; the distance between two adjacent grooves is equal to the distance between two through holes arranged adjacent to each other along the length of the substrate. This design ensures that when the outer wall of the roller rolls against the upper surface of the strip plate, there is a gap between the sharp end of the cutting tool and the film; when the outer wall of the roller rolls against the bottom wall of the groove, the sharp end of the cutting tool is located inside the through hole and below the upper surface of the substrate.

[0022] Preferably, the lower surface of the strip plate is flush with the lower surface of the substrate, the upper surface of the strip plate is higher than the upper surface of the film, and the bottom wall of the groove is lower than the upper surface of the substrate. The purpose of this design is that when the roller rolls to the center of the groove, the sharp end of the cutting tool is precisely at the center of the through hole.

[0023] The present invention has the following technical effects:

[0024] This application designs a base platform that allows the substrate to be reliably arranged, and the moving components, slotting components, and limiting components to be reliably mounted on the base platform.

[0025] In this application, the horizontal telescopic end of the first horizontal telescopic component is fixed to the bracket, the support beam is rotatably connected to the bracket, and a cutting tool is installed on the support beam. The first horizontal telescopic component can drive the cutting tool to move stably along the length direction of the substrate.

[0026] This application designs a limiting component and utilizes the periodic distribution of through holes on the substrate. A strip plate with grooves is set on the side of the substrate. By utilizing the similarity between the grooves on the strip plate and the through holes on the substrate in the vertical direction, the abutment will regularly enter and exit the groove when the support beam moves along the length of the substrate, thereby realizing the intermittent scribing of the film by the scribing knife. This application adjusts the existing continuous scribing method to the intermittent scribing method, which can process micro-cracks with small slit length and slit width on the film, thereby enabling the film-panel composite sound-absorbing board to obtain better sound absorption performance.

[0027] When the outer wall of the roller rolls against the upper surface of the strip plate, there is a gap between the sharp end of the cutting tool and the film, and the cutting tool does not correspond to the through hole position at this time. Therefore, the cutting tool will not scratch the film and substrate at non-through hole positions during its movement. However, when the outer wall of the roller rolls against the bottom wall of the groove, the sharp end of the cutting tool is located inside the through hole and can smoothly cut through the film. That is, the cutting tool can cut through the film inside the through hole. During the process of the cutting tool entering and leaving the through hole, the sharp end of the cutting tool will not impact the substrate or the edge of the through hole. This method can reduce the wear of the cutting tool and ensure that the surface of the substrate is not scratched.

[0028] Most importantly, through the design of this application, the aperture of the through hole on the substrate can be made large, while the length of the microcrack is still relatively short. This can solve the physical contradiction that the size of the through hole on the substrate needs to be large for ease of processing and small for superior sound absorption performance. While ensuring the sound absorption performance of the board-film composite sound-absorbing board, the manufacturing cost and manufacturing difficulty of the substrate are greatly reduced.

[0029] The strip plate in this application has multiple grooves at equal intervals. This design allows the carving knife to move strictly along the trajectory of the grooved surface of the strip plate, ensuring the quality and uniformity of the micro-crack opening, while also improving the opening efficiency. The downward displacement of the carving knife depends on the groove depth. In this application, the groove depth is constant to ensure the opening accuracy.

[0030] By designing rollers, on the one hand, it is ensured that the strip plate and connecting rods are not easily worn, thus guaranteeing the slit opening accuracy; on the other hand, the linear and rotational processes of the carving knife are relatively smooth.

[0031] By designing a torsion spring, the torsion spring has the tendency to drive the support beam to rotate. On the one hand, it ensures that the abutment part can always press against the upper surface of the strip plate or the bottom wall of the groove; on the other hand, it gives the sharp end of the carving knife a certain downward pressure. When the carving knife corresponds to the position of the through hole and contacts the film, the above-mentioned downward pressure can enable the carving knife to smoothly cut through the film inside the through hole.

[0032] By designing the second horizontal telescopic component, after the cutting tool completes the carving of a row of microcracks, the second horizontal telescopic component can drive the cutting tool to move along the width direction of the substrate, thereby facilitating the cutting tool to carve the next row of microcracks. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is an isometric view of a micro-crack opening device on a composite sound-absorbing panel;

[0035] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0036] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle;

[0037] Figure 4 yes Figure 1 A magnified view of a section at point C;

[0038] Figure 5 This is a partial isometric view of a microcrack opening device on a composite sound-absorbing panel;

[0039] Figure 6 This is a partial cross-sectional schematic diagram of a composite sound-absorbing panel.

[0040] In the diagram:

[0041] 01 is the substrate, 010 is the through hole, 02 is the thin film, 03 is the base, 04 is the mounting base one, 05 is the lead screw one, 06 is the nut one, 07 is the motor one, 08 is the bracket, 09 is the support beam, 090 is the round tube, 10 is the torsion spring, 11 is the engraving knife, 12 is the mounting base two, 13 is the lead screw two, 14 is the nut two, 15 is the motor two, 16 is the strip plate, 160 is the groove, 17 is the connecting rod, and 18 is the roller. Detailed Implementation

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] This invention discloses a slit-opening device for microcracks on a composite sound-absorbing plate. By designing a base 03, the substrate 01 can be reliably arranged, and the moving component, slit-opening component, and limiting component can be reliably installed on the base 03.

[0044] In this application, the horizontal telescopic end of the first horizontal telescopic component is fixed to the bracket 08, the support beam 09 is rotatably connected to the bracket 08, and the support beam 09 is equipped with a cutting tool 11. The first horizontal telescopic component can drive the cutting tool 11 to move stably along the length direction of the substrate 01.

[0045] This application designs a limiting component that utilizes the periodic distribution of through holes 010 on the substrate 01. A strip plate 16 with grooves 160 is provided on the side of the substrate 01. Utilizing the vertical similarity between the grooves 160 on the strip plate 16 and the through holes 010 on the substrate 01, the abutment will periodically move in and out of the grooves 160 as the support beam 09 moves along the length of the substrate 01. This achieves intermittent cutting of the film 02 by the cutting knife 11. This application adjusts the existing continuous cutting method of the cutting knife 11 to an intermittent cutting method, which can process micro-cracks with small slit length and width on the film 02, thereby enabling the composite sound-absorbing board to obtain superior sound absorption performance. Simultaneously, because there is a gap between the sharp end of the cutting knife 11 and the film 02 when the outer wall of the roller 18 rolls against the upper surface of the strip plate 16, and the cutting knife 11 does not correspond to the position of the through hole 010 at this time, the cutting knife 11 will not cut during movement. The film 02 and substrate 01 at the non-through hole 010 position are damaged; when the outer wall of the roller 18 rolls and abuts against the bottom wall of the groove 160, the sharp end of the scribe 11 is located inside the through hole 010 and can smoothly cut through the film 02. That is, the scribe 11 can cut through the film 02 inside the through hole 010. During the process of entering and leaving the through hole 010, the sharp end of the scribe 11 will not impact the substrate 01 and the edge of the through hole 010. This method can reduce the wear of the scribe 11 and ensure that the surface of the substrate 01 is not scratched. Most importantly, through the design of this application, the aperture of the through hole 010 on the substrate 01 can be made large, while the length of the microcrack is still relatively short. This can solve the physical contradiction that the size of the through hole 010 on the substrate 01 needs to be large for processing convenience and small for superior sound absorption performance. While ensuring the sound absorption performance of the film-plate composite sound-absorbing board, the manufacturing cost and manufacturing difficulty of the substrate 01 are greatly reduced.

[0046] In this application, the strip plate 16 is provided with multiple grooves 160 at equal intervals. This design allows the engraving knife 11 to move strictly along the plate surface trajectory of the strip plate 16 with grooves 160, ensuring the quality and uniformity of micro-crack opening, while also improving opening efficiency. The downward displacement of the engraving knife 11 depends on the groove depth of the groove 160. In this application, the groove depth of the groove 160 is constant to ensure opening accuracy.

[0047] By designing the roller 18, on the one hand, it ensures that the strip plate 16 and connecting rod 17 are not easily worn, thus guaranteeing the slit opening accuracy; on the other hand, the linear movement and rotation of the carving knife 11 are relatively smooth.

[0048] By designing the torsion spring 10, the torsion spring 10 has the tendency to drive the support beam 09 to rotate. On the one hand, it ensures that the abutting part can always press against the upper surface of the strip plate 16 or the bottom wall of the groove 160. On the other hand, it gives the sharp end of the carving knife 11 a certain downward pressure. When the carving knife 11 corresponds to the position of the through hole 010 and contacts the film 02, the above-mentioned downward pressure can make the carving knife 11 smoothly cut through the film 02 inside the through hole 010.

[0049] By designing the second horizontal telescopic component, after the cutting blade 11 completes the cutting of a row of microcracks, the second horizontal telescopic component can drive the cutting blade 11 to move along the width direction of the substrate 01, thereby facilitating the cutting blade 11 to cut the next row of microcracks.

[0050] Example: See Appendix Figure 1-6 This is a schematic diagram of the overall and partial structure of one embodiment of the present invention. The present invention specifically discloses a slit-opening device for microcracks on a plate-film composite sound-absorbing plate. The plate-film composite sound-absorbing plate includes a rectangular substrate 01 and a thin film 02 attached to one side of the substrate 01. A plurality of circular through holes 010 are opened on the surface of the substrate 01. The plurality of through holes 010 are arranged equidistantly along the length direction of the substrate 01. In the finished plate-film composite sound-absorbing plate, the thin film 02 is provided with two microcracks located inside the through holes 010. The purpose of this application is to open the aforementioned microcracks.

[0051] The slit-opening device in this application includes:

[0052] The base 03 has a horizontally arranged upper platform. In this embodiment, the base 03 is rectangular. A rectangular substrate 01 is horizontally laid on the upper platform of the base 03, and the film 02 is located above the substrate 01. The substrate 01 is stably arranged on the base 03 by its own weight or fasteners. When the cutting tool 11 makes microcracks, there will be no relative movement between the substrate 01 and the base 03.

[0053] The moving component includes a horizontal telescopic member 1 and a bracket 08. The horizontal telescopic member 1 is mounted on the base 03 and has a horizontal telescopic end. The moving direction of the horizontal telescopic end is the same as the length direction of the substrate 01. The bracket 08 is fixed to the horizontal telescopic end. The horizontal telescopic member 1 can drive the bracket 08 to reciprocate along the length direction of the substrate 01.

[0054] The slit assembly includes a support beam 09, a torsion spring 10, and a cutting tool 11. The support beam 09 is rotatably connected to the bracket 08, and the two have a horizontally arranged axis of rotation. The axis of rotation is parallel to the length direction of the support beam 09, and the length direction of the support beam 09 is perpendicular to the movement direction of the horizontal telescopic end. The torsion spring 10 is sleeved on the support beam 09, with one end of the torsion spring 10 fixed to the support beam 09 and the other end of the torsion spring 10 fixed to the bracket 08. The cutting tool 11 is mounted on the support beam 09, with a sharp end away from the support beam 09. The length direction of the cutting tool 11 is inclined relative to the surface of the substrate 01. The horizontal telescopic component can drive the cutting tool 11 to move along the length direction of the substrate 01.

[0055] The limiting component includes a strip plate 16 and an abutment member. The strip plate 16 is horizontally arranged and fixed on the base 03. The length direction of the strip plate 16 is the same as the moving direction of the horizontal telescopic end. The upper surface of the strip plate 16 is provided with multiple grooves 160, which are arranged equidistantly along the length direction of the strip plate 16. The upper end of the abutment member is connected to the support beam 09. The upper surface of the strip plate 16 and the bottom wall of the groove 160 can both abut against the lower end of the abutment member.

[0056] The upper and lower ends of the abutment are arranged sequentially along the moving direction of the horizontal telescopic end, that is, the abutment is arranged at an angle relative to the horizontal plane. When the lower end of the abutment abuts against the upper surface of the strip plate 16 and the bottom wall of the groove 160 respectively, the support beam 09 can reciprocate relative to the bracket 08; when the abutment abuts against the upper surface of the strip plate 16, there is a gap between the sharp end of the cutting knife 11 and the film 02; when the abutment abuts against the bottom wall of the groove 160, the sharp end of the cutting knife 11 is located inside the through hole 010 and can cut the film 02; due to the design The device includes a torsion spring 10, which tends to rotate the support beam 09. On the one hand, this ensures that the abutting member can always press against the upper surface of the strip plate 16 or the bottom wall of the groove 160. On the other hand, it gives the sharp end of the engraving knife 11 a certain downward pressure. When the engraving knife 11 is aligned with the through hole 010 and contacts the film 02, the aforementioned downward pressure enables the engraving knife 11 to smoothly cut through the film 02 inside the through hole 010. The engraving knife 11 cuts a certain distance on the film 02 to form a microcrack. The length direction of the microcrack is the same as the length direction of the substrate 01.

[0057] Two horizontal telescopic components and two brackets are provided. The horizontal telescopic component includes a mounting base 04, a lead screw 05, a nut 06, and a motor 07. The two mounting bases 04 are fixed on both sides of the base 03. The mounting base 04 has a sliding contact surface 1. Each mounting base 04 rotatably supports a lead screw 05. Each lead screw 05 is screwed with a nut 06. The nut 06 has a sliding contact surface 2. The sliding contact surface 1 and the sliding contact surface 2 slide tightly together to ensure that the nut 06 does not rotate when the lead screw 05 rotates. The bracket 08 is fixed to the nut 06. The motor 07 is fixed to the mounting base 04. The output shaft of the motor 07 is coaxially fixed with the lead screw 05. The motor 07 drives the lead screw 05 to rotate. When the lead screw 05 rotates, the nut 06 can reciprocate along the length of the lead screw 05. The two horizontal telescopic components can reliably drive the support beam 09 to move. The two brackets 08 ensure that the support beam 09 can move and rotate stably.

[0058] Both ends of the support beam 09 are integrally formed with circular tubes 090, the length direction of the circular tubes 090 is the same as the length direction of the support beam 09. The bracket 08 is integrally formed with a fixed shaft with a circular cross-section, which is coaxially inserted into the circular tubes 090. The circular tubes 090 can rotate relative to the fixed shaft. This design ensures that the support beam 09 and the bracket 08 can be reliably rotatably connected. Each circular tube 090 is coaxially fitted with a torsion spring 10 on its outer side. The outer wall of the circular tube 090 has a first insertion hole, and one end of the torsion spring 10 is inserted into the first insertion hole. The outer wall of the bracket 08 has a second insertion hole, and the other end of the torsion spring 10 is inserted into the second insertion hole. The torsion springs 10 can be reliably arranged and can reliably apply a certain torque to the support beam 09.

[0059] More specifically, the slit assembly also includes a second horizontal telescopic component, which includes a second mounting base 12, a second lead screw 13, a second nut 14, and a second motor 15. The second mounting base 12 is fixed to the support beam 09 and has a third sliding contact surface. The second lead screw 13 is rotatably supported on the second mounting base 12. The length direction of the second lead screw 13 is the same as the length direction of the support beam 09. Nuts 14 are screwed onto the second lead screw 13. One end of the carving knife 11 is fixed to the second nut 14. The second nut 14 has a fourth sliding contact surface. Surface 3 and sliding contact surface 4 slide tightly together to ensure that nut 14 will not rotate when lead screw 2 13 rotates. Motor 2 15 is fixed to mounting base 2 12. The output shaft of motor 2 15 is coaxially fixed with lead screw 2 13. Motor 2 15 drives lead screw 2 13 to rotate. When lead screw 2 13 rotates, nut 2 14 can reciprocate along the length of lead screw 2 13. After completing the engraving of a row of microcracks, horizontal telescopic component 2 can drive engraving knife 11 to move a certain distance along the width of substrate 01. Engraving knife 11 begins to open the next row of microcracks.

[0060] The abutment includes a connecting rod 17 and a roller 18. One end of the connecting rod 17 is fixed to the support beam 09, and the other end of the connecting rod 17 is rotatably supported by the roller 18. The axis of the roller 18 is perpendicular to the length direction of the strip plate 16. The upper surface of the strip plate 16 and the bottom wall of the groove 160 can roll and abut against the outer wall of the roller 18. The design of the roller 18 makes the strip plate 16 less prone to wear. The length direction of the connecting rod 17 is perpendicular to the length direction of the support beam 09. The connecting rod 17 is inclined relative to the upper surface of the strip plate 16. The length direction of the engraving knife 11 is inclined relative to the surface of the substrate 01.

[0061] Two strip plates 16 are provided and their ends are aligned. The substrate 01 is centrally arranged between the two strip plates 16. The purpose of this design is to ensure that the support beam 09 can rotate smoothly in both directions and that the cutting knife 11 can reliably cut the film 02.

[0062] The substrate 01 has multiple rows of through holes 010. The through holes 010 in adjacent rows are arranged at equal intervals along the width direction of the substrate 01. In this embodiment, there are multiple sets of engraving blades 11. The multiple sets of engraving blades 11 are arranged at equal intervals along the length direction of the support beam 09. Each set has multiple engraving blades 11. The multiple engraving blades 11 are arranged in sequence along the length direction of the support beam 09. Each through hole 010 can be directly opposite the position of multiple engraving blades 11 at the same time. In this embodiment, each set has two engraving blades 11, that is, two micro-cracks can be engraved on the inner side of each through hole 010 simultaneously.

[0063] The upper surface of the strip plate 16 and the bottom wall of the groove 160 have a smooth transition. The bottom wall of the groove 160 is parallel to the surface of the strip plate 16. That is, the two groove sidewalls arranged opposite each other along the length of the strip plate 16 on the groove 160 are arc-shaped, and the bending radius of the groove sidewall is much larger than the radius of the roller 18. This design can ensure that the roller 18 moves smoothly when rolling into and out of the groove 160. The roller 18 is relatively wide and made of elastic material, such as rubber. This design helps to increase its rolling friction with the strip plate 16 and prevent the roller 18 from sliding or jumping, which would affect the stability of the opening.

[0064] The length of the bottom wall of the groove 160 along the length of the strip plate 16 is less than the minimum aperture of the through hole 010 along the length of the substrate 01; the distance between two adjacent grooves 160 is equal to the distance between two adjacent through holes 010 arranged along the length of the substrate 01. This design ensures that the sharp end of the cutting tool 11 will not come into contact with the hole wall or edge of the through hole 010, whether the cutting tool 11 is away from or near the substrate 01, i.e., whether the cutting tool 11 is cutting the film 02 or not. The cutting tool 11 will not have a hard impact with the substrate 01, and neither the cutting tool 11 nor the substrate 01 will be damaged. In this embodiment, the length of the bottom wall of the groove 160 along the length of the strip plate 16 is 0.5mm-1.5mm, and the groove depth of the groove 160 is 0.5mm-5.0mm. The groove depth of the groove 160 determines the displacement of the sharp end of the cutting tool 11 into the through hole 010.

[0065] The lower surface of the strip plate 16 is flush with the lower surface of the substrate 01, and the upper surface of the strip plate 16 is higher than the upper surface of the film 02. The bottom wall of the groove 160 is lower than the upper surface of the substrate 01. In this embodiment, the height difference between the upper surface of the strip plate 16 and the upper surface of the film 02 is 0.2mm-2.0mm. When the roller 18 rolls and abuts against the upper surface of the strip plate 16, the sharp end of the scribe 11 moves away from the film 02. The bottom wall of the groove 160 is lower than the upper surface of the substrate 01. When the roller 18 rolls and abuts against the bottom wall of the groove 160, the sharp end of the scribe 11 moves laterally and also swings down into the through hole 010. At this time, the scribe 11 will cut through the film 02, thereby realizing the opening of micro-cracks.

[0066] The distance between two adjacent grooves 160 on the same strip plate 16 is a, and the distance between two adjacent through holes 010 along the length of the substrate 01 is b. a and b are equal. When the roller 18 rolls to the center of the bottom wall of the groove 160, the sharp end of the engraving knife 11 is exactly at the center of the through hole 010. Alternatively, the distance between the axis of the roller 18 and the sharp end of the engraving knife 11 along the length of the substrate 01 is zero or an integer multiple of a.

[0067] When using this slit-opening device, the substrate 01 needs to be reliably laid flat and fixed on the base 03 beforehand. Then, the positions of the support beam 09 and the engraving knife 11 are adjusted, that is, the position of the engraving knife 11 is adjusted to ensure that the support beam 09 and the engraving knife 11 are both located at the beginning of the substrate 01.

[0068] Seam opening stage:

[0069] The horizontal telescopic component drives the engraving blade 11 to move forward along the length direction of the substrate 01. During the movement of the engraving blade 11, the sharp end of the engraving blade 11 is located behind the upper end of the engraving blade 11 along the forward direction of the engraving blade 11. At the same time, the end of the connecting rod 17 with the roller 18 is located behind the upper end of the connecting rod 17. In this way, as the roller 18 moves in and out of the groove 160, the connecting rod 17 will drive the support beam 09 to rotate back and forth. The support beam 09 will drive the engraving blade 11 to swing up and down. The engraving blade 11 will intermittently engrave the film 02, thereby realizing the opening of microcracks.

[0070] After the engraving tool 11 completes the creation of a row of microcracks on the thin film 02, there is a stage for adjusting the position of the engraving tool 11. This stage has at least three adjustment methods, as detailed below:

[0071] The first adjustment method:

[0072] First, after the support beam 09 and the engraving knife 11 move to the tail end of the substrate 01, the engraving knife 11 moves along the width direction of the substrate 01, so that the engraving knife 11 moves to the position to be engraved in the next row of microcracks.

[0073] The second step is to move the support beam 09 in the opposite direction along the length of the substrate 01 until the support beam 09 moves to the first end of the substrate 01. In the first and second steps, the operator needs to hold the connecting rod 17 with his hand or a tool to ensure that the roller 18 is disengaged from the strip plate 16, that is, to ensure that the engraving knife 11 is disengaged from the film 02.

[0074] In the third step, after the support beam 09 moves to the first end of the substrate 01, the staff releases the connecting rod 17, and the roller 18 returns to contact with the strip plate 16. Then, the horizontal telescopic component drives the engraving knife 11 to move forward again along the length of the substrate 01, so as to open the next row of microcracks.

[0075] The second adjustment method:

[0076] A circular positioning hole is provided on the side wall of the bracket 08. The center line of the positioning hole is parallel to the length direction of the support beam 09. A positioning plate is fixed on the support beam 09. The positioning plate is arranged close to the bracket 08. The plate surface is perpendicular to the length direction of the support beam 09. A circular hole is opened on the plate surface of the positioning plate. The diameter of the circular hole is the same as that of the positioning hole. When the worker lifts the connecting rod 17 upward by hand or tool so that the roller 18 disengages from the strip plate 16, the positioning hole and the circular hole can be aligned.

[0077] After the support beam 09 and the engraving knife 11 move to the tail end of the substrate 01, the worker uses his hand or a tool to lift the connecting rod 17 upward so that the positioning hole and the round hole are aligned. At this time, the worker inserts one end of the positioning pin into both the round hole and the positioning hole.

[0078] After the aforementioned positioning pins are inserted, the position of the engraving blade 11 is adjusted. The engraving blade 11 first moves along the width direction of the substrate 01, so that the engraving blade 11 moves to the position to be engraved for the next row of microcracks. Then, the support beam 09 moves in the opposite direction along the length direction of the substrate 01 until the support beam 09 and the engraving blade 11 move to the beginning of the substrate 01. After the engraving blade 11 has completed its position adjustment, the operator removes the positioning pins that are simultaneously inserted into the positioning hole and the round hole. After the roller 18 returns to contact with the strip plate 16, the engraving blade 11 moves forward again along the length direction of the substrate 01 to engrave the next row of microcracks. This adjustment method does not require the operator to hold the connecting rod 17 with their hands or tools for a long time.

[0079] The third adjustment method:

[0080] One end of the strip plate 16 is integrally formed with a protrusion, and a rectangular abutment plate is fixed at the other end of the strip plate 16; the surface of the abutment plate is arranged vertically and the surface of the abutment plate is perpendicular to the length direction of the strip plate 16.

[0081] The lower end face of the protrusion is flush with the lower plate surface of the strip plate 16, and the upper end face of the protrusion is parallel to the upper plate surface of the strip plate 16. The upper end face of the protrusion is arranged higher than the upper plate surface of the strip plate 16. The upper end face of the protrusion and the upper plate surface of the strip plate 16 are smoothly transitioned. That is, the protrusion has a side wall that is inclined relative to the horizontal plane. The roller 18 located on the strip plate 16 can smoothly roll to the upper end face of the protrusion through the inclined side wall.

[0082] An installation tube is fixed on the support beam 09. The length of the installation tube is the same as that of the support beam 09. One end of the installation tube is open and the other end is closed. The open end wall of the installation tube slides tightly against the side wall of the bracket 08. A spring and a circularly shaped limiting post are coaxially embedded in the installation tube. One end of the spring abuts against the inner wall of the closed end of the installation tube, and the other end of the spring abuts against one end of the limiting post. The other end of the limiting post can be located outside the installation blind hole. A retaining ring is coaxially fixed inside the open end of the installation tube. The limiting post passes through the inner side of the retaining ring coaxially. A retaining ring is integrally formed on the limiting post coaxially. The retaining ring is located inside the installation blind hole and can abut against the retaining ring. The purpose of the retaining ring and retaining ring is to prevent the limiting post from completely coming out of the installation blind hole.

[0083] A circular snap-fit ​​hole is provided on the side wall of the bracket 08. The end wall of the limiting post away from the spring is provided with a rounded corner, and the edge of the snap-fit ​​hole is also provided with a rounded corner. That is, when the mounting tube rotates with the support beam 09, the end of the limiting post away from the spring can move into and out of the snap-fit ​​hole. During the opening stage, the limiting post slides against the side wall of the bracket 08.

[0084] One end of the abutment rod is fixed to the support beam 09, and the other end of the abutment rod is the abutment end. The length direction of the abutment rod is perpendicular to the length direction of the support beam 09. During the forward or reverse movement of the support beam 09, the abutment rod is arranged at an angle relative to the horizontal plane.

[0085] When the support beam 09 and the engraving knife 11 move forward to the tail end of the substrate 01, the roller 18 can roll to the upper end face of the protrusion. At this time, the roller 18 disengages from the strip plate 16, and the limiting post is aligned with the snap-fit ​​hole. Due to the elastic force of the spring, the end of the limiting post away from the spring will be embedded in the snap-fit ​​hole. At this time, the knife 11 will remain in a state of disengagement from the film 02.

[0086] The engraving tool 11 then moves along the width direction of the substrate 01, so that the engraving tool 11 moves to the engraving position of the next column of microcracks;

[0087] After the cutting blade 11 is adjusted in the width direction of the substrate 01, the support beam 09 begins to move in the reverse direction along the length direction of the substrate 01. When the support beam 09 and the cutting blade 11 are about to reach the first end of the substrate 01, the abutting end of the abutting rod will slide against the surface of the abutting plate. The abutting rod will drive the support beam 09 to rotate, forcing the end of the limiting post away from the spring to disengage from the locking hole. At the same time that the limiting post disengages from the locking hole, the support beam 09 and the cutting blade 11 reach the first end of the substrate 01. After the roller 18 returns to contact with the strip plate 16, the cutting blade 11 moves forward again along the length direction of the substrate 01 to complete the cutting of the next row of microcracks.

[0088] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0089] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A slit-opening device for microcracks in a composite sound-absorbing panel, the composite sound-absorbing panel comprising a substrate (01) and a thin film (02) attached to one side surface of the substrate (01), wherein a plurality of through holes (010) are formed on the surface of the substrate (01), and the plurality of through holes (010) are arranged equidistantly along the length direction of the substrate (01), characterized in that, include: A base (03) has a horizontally arranged upper platform, on which the substrate (01) is horizontally laid, and the film (02) is located above the substrate (01). The moving component includes a horizontal telescopic member and a bracket (08). The horizontal telescopic member is mounted on the base (03). The horizontal telescopic member has a horizontal telescopic end. The moving direction of the horizontal telescopic end is the same as the length direction of the base plate (01). The bracket (08) is fixed to the horizontal telescopic end. A slit assembly includes a support beam (09), a torsion spring (10), and a carving knife (11). The support beam (09) is rotatably connected to the bracket (08) and the two have a horizontally arranged axis of rotation. The axis of rotation is parallel to the length direction of the support beam (09), and the length direction of the support beam (09) is perpendicular to the moving direction of the horizontal telescopic end. The torsion spring (10) is sleeved on the support beam (09), one end of the torsion spring (10) is fixed to the support beam (09), and the other end of the torsion spring (10) is fixed to the bracket (08). The carving knife (11) is mounted on the support beam (09), and the end of the carving knife (11) away from the support beam (09) is sharp. A limiting component, comprising a strip plate (16) and an abutment member, wherein the surface of the strip plate (16) is horizontally arranged and fixed on the base (03), the length direction of the strip plate (16) is the same as the moving direction of the horizontal telescopic end, and the upper surface of the strip plate (16) is provided with a plurality of grooves (160), the plurality of grooves (160) being arranged equidistantly along the length direction of the strip plate (16); the upper end of the abutment member is connected to the support beam (09), the strip plate ( The upper surface of the strip plate (16) and the bottom wall of the groove (160) can both abut against the lower end of the abutment. The upper and lower ends of the abutment are arranged sequentially along the moving direction of the horizontal telescopic end. When the abutment abuts against the upper surface of the strip plate (16), there is a gap between the sharp end of the engraving knife (11) and the film (02). When the abutment abuts against the bottom wall of the groove (160), the sharp end of the engraving knife (11) is located inside the through hole (010) and can cut through the film (02).

2. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, Two horizontal telescopic components and two brackets (08) are provided. The horizontal telescopic component includes a mounting base (04), a lead screw (05), a nut (06), and a motor (07). The two mounting bases (04) are fixed on both sides of the base (03). The mounting base (04) has a sliding contact surface. Each mounting base (04) is rotatably supported by a lead screw (05). Each lead screw (05) is screwed with a nut (06). The nut (06) has a sliding contact surface. The sliding contact surface is in close contact with the sliding contact surface. The bracket (08) is fixed to the nut (06). The motor (07) is fixed to the mounting base (04). The output shaft of the motor (07) is coaxially fixed with the lead screw (05).

3. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, Both ends of the support beam (09) are integrally formed with round tubes (090), the length direction of the round tubes (090) is the same as the length direction of the support beam (09), the bracket (08) is integrally formed with a fixed shaft, the fixed shaft is coaxially inserted into the round tubes (090), each round tube (090) is coaxially fitted with a torsion spring (10) on its outer side, the outer wall of the round tube (090) is provided with a first insertion hole, one end of the torsion spring (10) is inserted into the first insertion hole, the outer wall of the bracket (08) is provided with a second insertion hole, the other end of the torsion spring (10) is inserted into the second insertion hole.

4. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, The slit assembly also includes a second horizontal telescopic component, which includes a second mounting base (12), a second lead screw (13), a second nut (14), and a second motor (15). The second mounting base (12) is fixed on the support beam (09). The second mounting base (12) has a third sliding contact surface. The second lead screw (13) is rotatably supported on the second mounting base (12). The length direction of the second lead screw (13) is the same as the length direction of the support beam (09). The second nut (14) is screwed onto the second lead screw (13). One end of the engraving knife (11) is fixed to the second nut (14). The second nut (14) has a fourth sliding contact surface. The third sliding contact surface and the fourth sliding contact surface slide tightly together. The second motor (15) is fixed to the second mounting base (12). The output shaft of the second motor (15) is coaxially fixed with the second lead screw (13).

5. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, The abutment includes a connecting rod (17) and a roller (18). One end of the connecting rod (17) is fixed to the support beam (09), and the other end of the connecting rod (17) is rotatably supported by the roller (18). The axis of the roller (18) is perpendicular to the length direction of the strip plate (16). The upper surface of the strip plate (16) and the bottom wall of the groove (160) can roll and abut against the outer wall of the roller (18). The length direction of the connecting rod (17) is perpendicular to the length direction of the support beam (09). The connecting rod (17) is inclined relative to the upper surface of the strip plate (16), and the length direction of the engraving knife (11) is inclined relative to the surface of the substrate (01).

6. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, Two strip plates (16) are provided and their ends are aligned, and the substrate (01) is centrally arranged between the two strip plates (16).

7. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, The engraving knife (11) is provided in multiple sets. The multiple sets of engraving knives (11) are arranged equidistantly along the length direction of the support beam (09). Each set is provided with multiple engraving knives (11). The multiple engraving knives (11) are arranged sequentially along the length direction of the support beam (09). The multiple engraving knives (11) in the same set can simultaneously correspond to the position of one through hole (010).

8. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, The upper surface of the strip plate (16) and the bottom wall of the groove (160) are smoothly connected, and the bottom wall of the groove (160) is parallel to the surface of the strip plate (16).

9. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, The length of the bottom wall of the groove (160) along the length of the strip plate (16) is less than the minimum aperture of the through hole (010) along the length of the substrate (01); the distance between two adjacent grooves (160) is equal to the distance between two through holes (010) arranged adjacent to each other along the length of the substrate (01).

10. The micro-crack opening device on a composite sound-absorbing panel according to claim 1, characterized in that, The lower surface of the strip plate (16) is flush with the lower surface of the substrate (01), the upper surface of the strip plate (16) is higher than the upper surface of the film (02), and the bottom wall of the groove (160) is lower than the upper surface of the substrate (01).

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