A kind of pressing equipment for flexible circuit board 3D steel sheet

Abstract

This invention proposes a bonding device for 3D steel sheets of flexible printed circuit boards (FPCs), belonging to the technical field of steel sheet bonding equipment, including a guide sleeve. The invention creates an annular groove on the suction head wall, dividing it into an outer annular wall and an inner annular wall with different stiffnesses, forming an asymmetric mechanical configuration. Two arc-shaped extensions of the sealing part connect to the inner and outer walls respectively, forming an asymmetric deformation guiding structure. During adsorption and compression, the axial compression is differentially distributed, constraining and driving the inner annular wall to deform radially inward, dynamically reconstructing a tapered channel that gradually narrows along the adsorption end. The entire process utilizes the adsorption action itself to achieve reversible transformation from a straight tube to a tapered tube. The tapered channel enhances the vacuum adsorption force and provides radial mechanical centering, achieving flexible adaptive clamping and damage-free bonding. During release, the tapered shape disappears, actively detaching from the 3D steel sheet. This solves the contradiction between rigid suction heads easily damaging workpieces and flexible suction heads lacking radial constraint, making it particularly suitable for high-precision bonding of FPC 3D steel sheets.

Description

Technical Field

[0001] This invention relates to the field of steel sheet bonding equipment, and more particularly to a bonding equipment for 3D steel sheets of flexible circuit boards. Background Technology

[0002] In 3D steel sheet bonding equipment for flexible printed circuit boards, the suction head needs to pick up, transfer, and mount the steel sheet. This type of equipment typically includes a guide sleeve, a hollow guide shaft that slides within the guide sleeve, and a suction head connected to the bottom end of the hollow guide shaft. The suction head is connected to a vacuum system to adsorb the steel sheet.

[0003] Existing suction head structures are mainly divided into two categories: rigid suction heads rely on the flatness of the end face to form a seal, which has high positioning accuracy, but it is in hard contact with the steel sheet, which can easily cause surface indentation, and it is sensitive to the flatness tolerance of the steel sheet, resulting in insufficient sealing reliability; flexible suction heads are integrally molded from elastic materials, which can conform to the surface of the steel sheet to achieve non-destructive adsorption, but the overall rigidity is low, the placement positioning accuracy is poor, and there is a lack of radial constraint in the adsorption state, which can easily cause side slippage during the transfer of the steel sheet.

[0004] Furthermore, neither of the aforementioned types of suction heads can actively generate radial clamping force during the adsorption process, making it difficult to simultaneously ensure both surface protection and precise positioning of the steel sheet. Especially when the 3D steel sheet has a three-dimensional structure, existing suction heads struggle to meet the process requirements of adaptive bonding, reliable adsorption, and non-destructive release. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a bonding device for 3D steel sheets of flexible circuit boards, which solves the technical problems mentioned in the background section.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a bonding device for 3D steel sheets of flexible circuit boards, comprising:

[0007] Guide sleeve;

[0008] A hollow guide shaft is elastically slidably sleeved inside the guide sleeve along the axial direction, and the bottom end of the hollow guide shaft passes through the internal cavity of the guide sleeve and extends outward;

[0009] The suction head, connected to the bottom of the hollow guide shaft, includes:

[0010] An annular groove is formed at the suction end of the suction head and extends axially along the hollow guide shaft, dividing the suction head wall into an outer annular wall and an inner annular wall with different stiffnesses, which together form an asymmetric mechanical configuration.

[0011] The sealing part is provided in an arc-shaped protrusion at the suction end of the suction head. The two arc-shaped extension ends of the sealing part are respectively connected to the bottom ends of the outer annular wall and the inner annular wall. When the sealing part is axially compressed relative to the 3D steel sheet, the two arc-shaped extension ends form an asymmetric deformation guiding structure relative to the asymmetric mechanical configuration.

[0012] The axial compression of the sealing part causes the asymmetric deformation guiding structure to distribute the axial compression amount to the asymmetric mechanical configuration, constraining the bottom end of the inner annular wall to tilt inward along the radial direction to elastically deform, so as to dynamically reconstruct the suction head cavity to form a tapered channel that gradually narrows towards the adsorption end along the negative pressure conduction direction.

[0013] Preferably, the arc-shaped extension end of the sealing part connects to the bottom end of the outer annular wall to form a fitting interface with the bottom end of the outer annular wall, and the arc-shaped extension end of the sealing part connects to the bottom end of the inner annular wall to form a smooth transition into an integral structure.

[0014] Preferably, the outer annular wall is made of a rigid material forming an undeformable skeleton layer, and the sealing part and the inner annular wall are integrally formed of an elastic material forming a deformable functional layer.

[0015] Preferably, after the bottom end of the inner annular wall is radially inwardly deformed, an acute angle is formed between its inner wall surface and the axis of the suction head.

[0016] Preferably, a spring is sandwiched between the inner top wall of the hollow guide shaft and the top end of the guide sleeve.

[0017] Preferably, the outer wall of the suction head protrudes radially to form a platform portion, and a gap I is formed between the top surface of the platform portion and the bottom end face of the guide sleeve. The axial opening of the gap I is proportional to the compression of the spring.

[0018] Preferably, the bottom outer edge of the guide sleeve has annularly equidistant outward protrusions forming several L-shaped portions, and the horizontal portion of each L-shaped portion extends below the bottom surface of the platform portion to form a gap two with a dynamic axial opening relative to gap one.

[0019] Preferably, each of the two gaps is provided with an airbag, each airbag having a one-way exhaust hole and a one-way inlet hole, and the exhaust direction of each one-way exhaust hole is inclined toward the suction end of the suction head.

[0020] By employing the above technical solution, the present invention provides a bonding device for 3D steel sheets of flexible circuit boards, which has at least the following beneficial effects:

[0021] This invention creates an asymmetrical mechanical configuration by opening an annular groove on the suction head wall, dividing it into an outer annular wall and an inner annular wall with different stiffnesses. The two arc-shaped extensions of the sealing part connect to the inner and outer walls respectively, forming an asymmetrical deformation guiding structure. During adsorption and compression, the axial compression is differentially distributed, constraining and driving the inner annular wall to deform radially inward, dynamically reconstructing a tapered channel that gradually narrows along the adsorption end. The entire process utilizes the adsorption action itself to achieve reversible transformation from a straight tube to a tapered tube. The tapered channel enhances the vacuum adsorption force and provides radial mechanical centering, achieving flexible adaptive clamping and damage-free bonding. During release, the tapered shape disappears, actively detaching from the 3D steel sheet. This solves the contradiction between rigid suction heads being prone to damaging workpieces and flexible suction heads lacking radial constraints, making it particularly suitable for high-precision bonding of FPC 3D steel sheets. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0024] Figure 2 This is a partial cross-sectional planar structural schematic diagram of the present invention;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of its first state-planar structure;

[0026] Figure 4 For the present invention Figure 2 The second state is a schematic diagram of the planar structure;

[0027] Figure 5 For the present invention Figure 2 The third state is a schematic diagram of the planar structure.

[0028] In the figure: 1. Guide sleeve; 11. L-shaped part; 2. Hollow guide shaft; 3. Suction head; 31. Annular groove; 311. Outer annular wall; 312. Inner annular wall; 32. Sealing part; 33. Platform part; 4. Spring; 5. Airbag. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only 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.

[0030] Please refer to Figures 1-5 This embodiment proposes a bonding device for 3D steel sheets of flexible circuit boards, comprising:

[0031] Guide sleeve 1;

[0032] Hollow guide shaft 2 is elastically slidably sleeved inside guide sleeve 1 along the axial direction. The sliding part of the outer wall of hollow guide shaft 2 is slidably disposed in the groove opened in the inner wall of guide sleeve 1 along the axial direction of guide sleeve 1. The bottom end of hollow guide shaft 2 passes through the internal cavity of guide sleeve 1 and extends outward.

[0033] The suction head 3, connected to the bottom of the hollow guide shaft 2, includes:

[0034] An annular groove 31 is formed at the adsorption end of the suction head 3 and extends axially along the hollow guide shaft 2, dividing the wall of the suction head 3 into an outer annular wall 311 and an inner annular wall 312 with different stiffnesses, which constitute an asymmetric mechanical configuration.

[0035] The sealing part 32 is provided in an arc-shaped protrusion at the adsorption end of the suction head 3. The two arc-shaped extension ends of the sealing part 32 are respectively connected to the bottom ends of the outer annular wall surface 311 and the inner annular wall surface 312. When the sealing part 32 is axially compressed relative to the 3D steel sheet, the two arc-shaped extension ends form an asymmetric deformation guiding structure relative to the asymmetric mechanical configuration.

[0036] The axial compression of the sealing part 32 causes the asymmetric deformation guiding structure to distribute the axial compression amount to the asymmetric mechanical configuration, constraining the bottom end of the inner annular wall 312 to tilt inward along the radial direction to elastically deform, so as to dynamically reconstruct the suction head 3 cavity to form a tapered channel that gradually narrows towards the adsorption end along the negative pressure conduction direction.

[0037] Specifically, according to existing technology, after the pressing equipment is started, the telescopic cylinder drives the entire device downward, and the suction head 3 descends together with the hollow guide shaft 2. The sealing part 32 first contacts the surface of the 3D steel sheet. At this time, the compression spring 4 sandwiched between the inner top wall of the hollow guide shaft 2 and the top of the guide sleeve 1 begins to be compressed, forming a first-stage floating buffer. (Refer to...) Figure 3 As shown, the inertial impact of the moving parts is absorbed by the spring 4 and converted into a gradual downward pressure, preventing the sealing part 32 from directly colliding with the 3D steel sheet.

[0038] As the cylinder continues to press down, the sealing part 32 is axially compressed. The two arc-shaped extensions of the sealing part 32 connect to the bottom end of the outer annular wall 311, respectively. Since the outer annular wall 311 is made of a rigid material and the outer annular wall 311 is made of an elastic material, they form an asymmetrical mechanical configuration. This causes the two arc-shaped extensions to form an asymmetrical deformation guiding structure when compressed. The end connecting to the outer annular wall 311 is rigidly constrained, and the deformation thrust is selectively guided to that end connecting to the outer annular wall 311. (Refer to...) Figure 4As shown. At the same time, the arc-shaped protrusion of the sealing part 32 adaptively conforms to the contour of the top surface of the 3D steel sheet as the pressure increases, expanding from line contact to surface contact, forming an annular surface seal, which automatically compensates for the micro-unevenness and flatness deviation of the 3D steel sheet surface.

[0039] When the sealing part 32 is further compressed, the asymmetric deformation guiding structure distributes the axial compression differentially to the asymmetric mechanical configuration. Most of the deformation displacement is guided to the bottom end of the outer annular wall 311, driving it to undergo radially inward tilting elastic deformation. The outer annular wall 311 remains stationary, forming a rigid constraint boundary. After the bottom end of the outer annular wall 311 tilts inward, the suction head 3 cavity dynamically reconstructs from a straight tube state near the adsorption end into a tapered channel with a gradually narrowing inner radial adsorption end. This channel is formed only when the sealing part 32 is compressed, and elastically returns to a straight tube after the pressure is removed.

[0040] After the conical channel is formed, the vacuum system is activated. As the airflow passes through the tapered section, the flow velocity increases and the static pressure decreases, generating a stronger negative pressure adsorption force on the surface of the 3D steel sheet based on the Venturi effect. At the same time, the inwardly inclined section of the outer annular wall 311 forms a radial elastic wrap around the edge of the 3D steel sheet, constituting a mechanical centering constraint. The axial pneumatic adsorption and radial mechanical clamping work in an orthogonal synergy, so even if there are batch differences in the thickness of the 3D steel sheet or slight surface unevenness, the elastic deformation of the outer annular wall 311 can automatically adjust the radial clamping force, and the surface seal of the sealing part 32 can also adaptively maintain the vacuum level.

[0041] The device drives the suction head 3 to move the steel sheet above the preset position on the flexible circuit board, and the device presses down again for mounting. The primary buffer spring 4 absorbs macroscopic displacement deviations, and the elastic deformation of the sealing part 32 absorbs microscopic local unevenness. The mounting pressure is evenly applied to the steel sheet through the surface sealing area and transmitted to the FPC surface. During the mounting pressure holding period, the conical channel and vacuum continue to work, and the outer annular wall 311 maintains an elastic wrapping around the steel sheet, preventing the 3D steel sheet from micro-displacement before the conductive adhesive or solder paste has cured.

[0042] After the bonding is completed, the vacuum is closed. The elastic potential energy accumulated in the sealing part 32 is released, restoring it to an arc-shaped convex shape; the outer annular wall surface 311 elastically retracts, and the cavity returns from a conical channel to a straight tube. The elastic recovery motion provides a smooth detachment assistance to the 3D steel sheet, and the inner wall surface actively detaches from the edge of the 3D steel sheet from the wrapped state, generating a slight downward peeling motion. The mechanical and pneumatic constraints are released simultaneously, and the 3D steel sheet falls smoothly to the predetermined position on the FPC surface under its own weight. The equipment resets, the suction head 3 cavity maintains the initial straight tube state, and the next cycle begins.

[0043] The sealing part 32 connects to the arc-shaped extension end of the bottom of the outer annular wall 311 to form a fitting interface, and the arc-shaped extension end of the bottom of the inner annular wall 312 connects to the bottom of the inner annular wall 312 to form a smooth transition into an integral structure.

[0044] Further reference Figures 3-4 As shown, when the sealing part 32 is compressed, its two arc-shaped extension ends produce differentiated mechanical responses due to their different connection relationships. The end connecting to the inner annular wall 312 is a smooth, integrated structure with continuous material and no interfacial resistance, allowing the elastic deformation thrust to be directly transmitted along the molecular chains, forming an efficient force transmission path. The end connecting to the outer annular wall 311 only forms a bonding interface; the materials on both sides of the interface are discontinuous. When the sealing part 32 is compressed and deforms, the bonding interface will experience slight slippage or a tendency to separate due to tangential stress. The deformation thrust is blocked at this interface and cannot be effectively transmitted to the outer annular wall 311. This difference in connection method constructs a deformation transmission channel that is closed on one side and open on the other. The elastic recovery stress generated by the sealing part 32 under axial compression is preferentially and almost entirely transmitted along the integrated structure side, driving the bottom end of the inner annular wall 312 to move radially inward. The bonding interface side remains separated or slippery, ensuring that the outer annular wall 311 does not participate in the deformation response.

[0045] The outer annular wall 311 is made of rigid material and has an undeformable skeleton layer, while the sealing part 32 and the inner annular wall 312 are integrally formed of elastic material and have a deformable functional layer.

[0046] Further reference Figures 3-4 As shown, the rigid material of the outer annular wall 311 can be a metal (stainless steel, aluminum alloy, hard alloy) or a hard engineering plastic (PEEK, POM, PA66 with glass fiber), with an elastic modulus of not less than 1 GPa. The elastic material of the sealing part 32 and the inner annular wall 312 can be fluororubber (FKM), silicone rubber (VMQ), nitrile rubber (NBR), or thermoplastic polyurethane (TPU), with a Shore A hardness range of 40 to 70.

[0047] The outer annular wall 311 is a rigid skeleton layer that maintains structural stability during the stages of equipment pressing, adsorption, transfer, and bonding. It provides geometric reference and mechanical support for the entire suction head 3, ensuring that the connection position between the suction head 3 and the hollow guide shaft 2 remains unchanged. At the same time, it provides a fixed rigid constraint boundary for the deformation of the inner annular wall 312, defining the radial starting surface of the deformation space.

[0048] The sealing part 32 and the inner annular wall 312 are integrally formed from an elastic material, eliminating the connection interface between them, and ensuring continuous and lossless deformation transmission. The deformation thrust generated by the sealing part 32 under pressure is seamlessly transmitted to the bottom end of the inner annular wall 312 through the integral structure, driving it to tilt inward. The integral molding ensures the immediacy and consistency of deformation transmission, avoiding the lag, loosening, or fatigue failure that may result from separate connections.

[0049] After the bottom end of the inner annular wall 312 is radially inclined and deformed, an acute angle is formed between its inner wall surface and the axis of the suction head 3.

[0050] Further reference Figures 3-4 As shown, the inner annular wall 312 forms an acute angle at its bottom, defining the convergence shape of the dynamic conical channel. This causes the cross-sectional area to decrease, the flow velocity to increase, and the static pressure to decrease as the airflow passes through this section. During this process, the smaller the angle, the more rapid the airflow convergence and the more significant the acceleration effect. The convergence shape of the dynamic conical channel results in a wedge-shaped contact between the inner wall of the inner annular wall 312 and the edge of the 3D steel sheet. The wedge generates a radial component force under axial load, converting part of the contact pressure into a radial clamping force on the 3D steel sheet. The smaller the acute angle, the larger the proportion of the radial component force, and the stronger the mechanical centering effect. During the release phase, when the vacuum is closed and the sealing part 32 elastically recovers, the inner annular wall 312 needs to spring back from the inclined state to the straight pipe state. The presence of the acute angle causes the springback displacement to have radially outward and axially downward components. This downward component constitutes the active peeling motion of detaching from the 3D steel sheet. In the above process, the angle size matches the elastic recovery stroke of the sealing part 32 to ensure a smooth release process.

[0051] The outer wall of the suction head 3 protrudes radially to form a platform portion 33. A gap 1 is formed between the top surface of the platform portion 33 and the bottom end face of the guide sleeve 1. The axial opening of the gap 1 is proportional to the compression of the spring 4. The outer edge of the bottom end of the guide sleeve 1 protrudes annularly at equal intervals to form several L-shaped portions 11. The transverse portion of each L-shaped portion 11 extends below the bottom surface of the platform portion 33 to form a gap 2 with a dynamic axial opening relative to the gap 1. An airbag 5 is provided in each gap 2. Each airbag 5 has a one-way exhaust hole and a one-way inlet hole. The exhaust direction of each one-way exhaust hole is inclined towards the suction end of the suction head 3.

[0052] In another embodiment of the present invention, after the device is started, the telescopic cylinder drives the entire device downward. The hollow guide shaft 2 carries the suction head 3 downward synchronously, and the sealing part 32 first contacts the surface of the 3D steel sheet. At this time, the suction head 3 is not yet fully compressed, and the compression spring 4 between the inner top wall of the hollow guide shaft 2 and the top of the guide sleeve 1 begins to be compressed, causing the hollow guide shaft 2 to slide axially relative to the guide sleeve 1. (Refer to...) Figure 3 As shown, as the hollow guide shaft 2 slides upward into the guide sleeve 1, the platform portion 33 on the outer wall of the suction head 3 moves upward accordingly, causing the gap between the top surface of the platform portion 33 and the bottom end surface of the guide sleeve 1 to decrease, the amount of decrease being proportional to the compression of the spring 4. Simultaneously, the gap between the horizontal portion of the L-shaped portion 11 at the bottom end of the guide sleeve 1 and the bottom surface of the platform portion 33 increases. (Refer to...) Figures 3-4As shown, the airbag 5, sandwiched within gap two, is axially stretched, increasing its internal volume and decreasing its air pressure. The one-way inlet opens under the pressure difference, allowing outside air to be drawn in; the one-way exhaust port remains closed due to reverse pressure. The airbag 5 completes its suction process during this phase, without introducing airflow into the adsorption area, thus not affecting the normal adsorption of the 3D steel sheet by the suction head 3.

[0053] After suction head 3 completes adsorption, the device drives the entire unit to rise to transfer the 3D steel sheet. During the rise, compression spring 4 releases the previously accumulated elastic potential energy, pushing hollow guide shaft 2 to return to its original position relative to guide sleeve 1. Hollow guide shaft 2 drives platform part 33 to move downward, gap one expands and returns to its original position, while gap two shrinks and returns to its original position as the bottom surface of platform part 33 and the top surface of the horizontal part of L-shaped part 11 approach each other. The contraction of gap two creates axial compression on airbag 5, reducing the volume inside the airbag and causing a sudden increase in air pressure. The one-way inlet hole closes under positive pressure, and the one-way exhaust hole opens, forcibly expelling the gas. The exhaust hole is inclined towards the adsorption end of suction head 3, and the exhaust flow is directed at high speed towards the edge of the stacked 3D steel sheet at a certain angle. Figure 5 As shown.

[0054] An inclined airflow intrudes from the side edge of the stacked 3D steel sheets, directly acting on the micro-gap between the adsorbed 3D steel sheet and the 3D steel sheet below. Upon entering the gap, the airflow is constrained by the surfaces of the two 3D steel sheets, forming a high-speed thin-layer flow and establishing a positive pressure zone at the gap entrance and inside. This positive pressure air film exerts a downward thrust on the upper surface of the lower 3D steel sheet, disrupting any vacuum adsorption, oil film adhesion, or electrostatic attraction that may exist between the layers. Simultaneously, the airflow pressure generates a local bending moment at the edge of the lower 3D steel sheet, causing slight elastic deflection at the edge. This deflection starts from the edge and gradually extends inward along the plane of the 3D steel sheet, progressively peeling away the originally adhered interface between the upper and lower 3D steel sheets. Because the peeling is a point-by-point process rather than a complete tear, the peeling resistance is significantly reduced, and it does not cause plastic deformation or surface scratches to the 3D steel sheet.

[0055] The entire exhaust process is driven by the reset spring 4, which is mechanically synchronized with the equipment's upward movement. When the adsorbed 3D steel sheet is reliably transferred, the lower 3D steel sheet has been effectively separated and left in the hopper, thus preventing the stacking phenomenon caused by the adhesion of the bottom 3D steel sheets.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bonding and laminating device for 3D steel sheets in flexible circuit boards, characterized in that, include: Guide sleeve; A hollow guide shaft is elastically slidably sleeved inside the guide sleeve along the axial direction, and the bottom end of the hollow guide shaft passes through the internal cavity of the guide sleeve and extends outward; The suction head, connected to the bottom of the hollow guide shaft, includes: An annular groove is formed at the suction end of the suction head and extends axially along the hollow guide shaft, dividing the suction head wall into an outer annular wall and an inner annular wall with different stiffnesses, which together form an asymmetric mechanical configuration. The sealing part is provided in an arc-shaped protrusion at the suction end of the suction head. The two arc-shaped extension ends of the sealing part are respectively connected to the bottom ends of the outer annular wall and the inner annular wall. When the sealing part is axially compressed relative to the 3D steel sheet, the two arc-shaped extension ends form an asymmetric deformation guiding structure relative to the asymmetric mechanical configuration. The axial compression of the sealing part causes the asymmetric deformation guiding structure to distribute the axial compression amount to the asymmetric mechanical configuration, constraining the bottom end of the inner annular wall to tilt inward along the radial direction to elastically deform, so as to dynamically reconstruct the suction head cavity to form a tapered channel that gradually narrows towards the adsorption end along the negative pressure conduction direction.

2. The bonding equipment for 3D steel sheets of flexible circuit boards according to claim 1, characterized in that, The sealing part forms a fitting interface between the arc-shaped extension end of the bottom of the outer annular wall and the bottom of the outer annular wall, and the arc-shaped extension end of the bottom of the inner annular wall and the bottom of the inner annular wall smoothly transition into an integral structure.

3. The bonding equipment for 3D steel sheets of flexible circuit boards according to claim 2, characterized in that, The outer annular wall is made of a rigid material and has an undeformable skeleton layer, while the sealing part and the inner annular wall are integrally formed of an elastic material and have a deformable functional layer.

4. The bonding equipment for 3D steel sheets of flexible circuit boards according to claim 3, characterized in that, After the bottom end of the inner annular wall is radially inwardly deformed, an acute angle is formed between its inner wall surface and the axis of the suction head.

5. The bonding equipment for 3D steel sheets of flexible circuit boards according to claim 1, characterized in that, A spring is sandwiched between the inner top wall of the hollow guide shaft and the top of the guide sleeve.

6. The bonding equipment for 3D steel sheets of flexible circuit boards according to claim 5, characterized in that, The outer wall of the suction head protrudes radially to form a platform portion, and a gap I is formed between the top surface of the platform portion and the bottom end face of the guide sleeve. The axial opening of the gap I is proportional to the compression of the spring.

7. The bonding equipment for 3D steel sheets of flexible circuit boards according to claim 6, characterized in that, The bottom outer edge of the guide sleeve protrudes outward in an annular shape at equal intervals to form several L-shaped portions. The horizontal portion of each L-shaped portion extends to the bottom surface of the platform portion to form a gap two relative to the dynamic axial opening of gap one.

8. The bonding equipment for 3D steel sheets of flexible circuit boards according to claim 7, characterized in that, Each of the two gaps is provided with an airbag, and each airbag has a one-way exhaust hole and a one-way inlet hole. The exhaust direction of each one-way exhaust hole is inclined towards the suction end of the suction head.

Images