A medium to large size bonding workbench

Abstract

The invention discloses a medium-to-large-sized bonding workbench, comprising an adjustment mechanism and a supporting mechanism arranged on the adjustment mechanism, wherein the supporting mechanism comprises a main negative pressure base plate, a glass rear supporting frame and a tensioning mechanism are installed on one side of the main negative pressure base plate, and a COF adsorption auxiliary support and a steel wire supporting frame are installed on the other side, the COF adsorption auxiliary support comprises a suction plate frame and a plurality of COF suction plates installed on the suction plate frame, the steel wire supporting frame comprises a steel wire and two parallel supporting plates, a row of grooved guide wheels are installed at the lower end of the supporting plate, the steel wire is stretched between the two supporting plates through the two rows of grooved guide wheels, and the head end of the steel wire is fixed to the front end of one of the supporting plates, and the tail end is locked by the tensioning mechanism. The invention uses a steel wire structure to support FPC, so that the FPC supporting mechanism is not only very thin but also light in weight, and when the COF supporting platform is aligned, even if the FPC supporting mechanism collides with the lower pad mechanism, no damage to the parts will be caused.

Description

Technical Field

[0001] The invention relates to a bonding workbench, in particular to a medium-to-large-sized bonding workbench. Background Art

[0002] The main function of the FOG / FOF bonding machine is to establish a stable electrical connection between the display substrate (or display substrate epitaxial COF-flexible circuit board with onboard display chip) and FPC using ACF (anisotropic conductive adhesive).

[0003] The display substrate is positioned, ACF glue is applied, and then it is aligned and pre-pressed with the FPC at the pre-pressing station. Finally, the ACF glue is melted at the main pressing station using process temperature and pressure, the particles are crushed and then shaped and cooled, and finally a stable electrical connection is formed between the two materials. The bonding accuracy is as high as ±5um. The support quality provided by the workbench during the entire process is particularly important. When bonding, not only the positioning and alignment accuracy must be guaranteed, but also the two materials that are only pre-pressed after alignment must not be misaligned or separated during the transfer and transmission process at the pre-pressing station and before the main pressing is completed after the pre-pressing is completed.

[0004] Most existing FPC support mechanisms are integral rigid support structures. During pre-pressing and main pressing, the workbench needs to cross the pad mechanism under the pressure head. During the alignment process, the support mechanism often collides with the pad under the pressure head, resulting in abnormal alignment and damage to parts. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a medium and large-sized bonding workbench. The present invention uses a steel wire structure to support the FPC, so that the FPC support table is not only very thin but also light in weight, reducing the total inertia of the platform option, and even if the FPC support mechanism collides with the lower platform mechanism during alignment, it will not cause damage to the parts.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted is as follows:

[0007] A medium-to-large-sized bonding workbench comprises a supporting mechanism, wherein the supporting mechanism comprises a main negative pressure substrate, a glass rear supporting frame and a tensioning mechanism are installed on one side of the main negative pressure substrate, and a COF adsorption auxiliary support and a steel wire supporting frame are installed on the other side; the glass rear supporting frame is used to support the portion of the display substrate that is larger than the main negative pressure substrate, the COF adsorption auxiliary support comprises a suction plate frame and a plurality of COF suction plates installed on the suction plate frame, the steel wire supporting frame comprises a steel wire and two parallel supporting plates, a row of grooved guide wheels are installed at the lower end of the supporting plate, the steel wire is stretched between the two supporting plates through the two rows of grooved guide wheels, the head end of the steel wire is fixed to the front end of one of the supporting plates, and the tail end is locked by the tensioning mechanism, and the tensioning force of the steel wire can be adjusted by the tensioning mechanism, so that the steel wire is always in the best tensioning state.

[0008] As a further improvement of the present invention, the glass rear support frame includes two parallel brackets, each bracket is provided with a first T-slot along its length direction, the bracket is connected to the main unit via a nut arranged in the first T-slot, the bracket is provided with an anti-static support block for supporting the glass, and the two brackets are connected by a connecting rod, which can increase the rigidity of the glass rear support frame.

[0009] As a further improvement of the present invention, the tensioning mechanism includes an L-shaped tensioning seat fixed on the side of the main negative pressure substrate, the side plate of the L-shaped tensioning seat is provided with an adjusting screw hole, the adjusting screw hole is provided with an adjusting bolt, the tail end of the adjusting bolt is provided with a wire sleeve for connecting a steel wire, and a limiting nut is provided on the side of the L-shaped tensioning seat side plate close to the adjusting bolt head.

[0010] As a further improvement of the present invention, multiple COF suction plates are installed on the suction plate frame by screws, and a second T-slot is opened on the suction plate frame along its length direction, and a step long slot hole is provided on the COF suction plate. The head of the screw is clamped in the second T-slot, and the tail of the screw passes through the step long slot hole and is locked by a nut. The multiple COF suction plates are fixed to the suction plate frame by the screws, and the installation angle of the COF suction plate can be adjusted by adjusting the position of the screw in the step long slot hole.

[0011] As a further improvement of the present invention, an auxiliary suction nozzle is also installed on the COF suction plate to increase the suction force of the COF suction plate.

[0012] As a further improvement of the present invention, the COF adsorption auxiliary bracket is connected to the main negative pressure substrate by pins and threaded holes, achieving a repeated disassembly and assembly accuracy within 0.1 mm. The COF pallet is used when performing FOF bonding operations, and is not used when performing FOG bonding operations. The COF pallet needs to be disassembled and assembled when switching models. After using multiple sets of COF pallets to adjust the corresponding FOF process models, the use of pins and threaded holes for disassembly and assembly can speed up the time for changing models.

[0013] As a further improvement of the present invention, the large-size bonding workbench also includes an adjustment mechanism, which includes an X-direction servo motion mechanism, a Y-direction servo motion mechanism, a Z-direction servo motion mechanism and a θ-direction servo motion mechanism arranged in sequence from bottom to top, and the supporting mechanism is arranged on the θ-direction servo motion mechanism. The supporting mechanism can be driven to move in the X-direction, Y-direction and Z-direction and rotate in the θ-direction through the adjustment mechanism.

[0014] The beneficial effects of the present invention are as follows: during pre-pressing and main pressing, the workbench also needs to cross the pad strip mechanism under the pressure head. In order to prevent the support mechanism from colliding with the lower pad during the alignment process, the present invention uses a steel wire structure to support the FPC, and uses a tensioning mechanism to ensure the tension of the steel wire, so that the FPC support platform is not only very thin but also light, reducing the total inertia of the platform. At the same time, it avoids damage to the mechanism during collision, and even if the support mechanism collides with the lower pad mechanism during alignment, it will not cause damage to the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 An exploded view of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the support mechanism of the present invention;

[0019] Figure 4 An exploded view of the support mechanism of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the COF adsorption auxiliary bracket according to the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the glass rear support frame according to the present invention;

[0022] Figure 7It is a structural schematic diagram of the tensioning mechanism of the present invention;

[0023] Figure 8 It is a schematic diagram of the use of the present invention. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0026] Example 1

[0027] like Figure 1-7 As shown, a medium-to-large size bonding workbench includes a support mechanism 1, wherein the support mechanism 1 includes a main negative pressure substrate 11, a glass rear support frame 12 and a tensioning mechanism 13 are installed on one side of the main negative pressure substrate 11, and a COF adsorption auxiliary support 14 and a wire support frame 15 are installed on the other side; the glass rear support frame 12 is used to support the portion of the display substrate that is larger than the main negative pressure substrate 11, and the COF adsorption auxiliary support 14 includes a suction plate frame 141 and a plurality of COF suction plates 14 installed on the suction plate frame 141. 2. The steel wire support frame 15 includes a steel wire 151 and two parallel supporting plates 152. A row of grooved guide wheels 153 are installed at the lower end of the supporting plate 152. The steel wire 151 is stretched between the two supporting plates 152 through the two rows of grooved guide wheels 153. The head end of the steel wire 151 is fixed to the front end of one of the supporting plates 152, and the tail end is locked by the tensioning mechanism 13. The tensioning force of the steel wire 151 can be adjusted by the tensioning mechanism 13, so that the steel wire 151 is always in the best tensioning state.

[0028] The glass rear support frame 12 includes two parallel brackets 121, and a first T-slot 122 is opened on the bracket 121 along its length direction. The bracket 121 is connected to the host through a nut set in the first T-slot 122. The bracket 121 is provided with an anti-static support block 123 for supporting the glass. The two brackets 121 are connected by a connecting rod 124, and the connecting rod 124 can increase the rigidity of the glass rear support frame 12.

[0029] The tensioning mechanism 13 includes an L-shaped tensioning seat 131 fixed on the side of the main negative pressure substrate 11, and an adjusting screw hole 132 is provided on the side plate of the L-shaped tensioning seat 131. The adjusting screw hole 132 is provided with an adjusting bolt 133, and a wire sleeve 134 for connecting the steel wire 151 is provided on the tail end of the adjusting bolt 133. A limiting nut 135 is provided on the side of the side plate of the L-shaped tensioning seat 131 close to the head of the adjusting bolt 133.

[0030] A plurality of the COF suction plates 142 are mounted on the suction plate frame 141 by screws. A second T-slot 143 is provided on the suction plate frame 141 along its length direction. A stepped long slot hole 144 is provided on the COF suction plate 142. The head of the screw is clamped in the second T-slot 143. The tail of the screw passes through the stepped long slot hole 144 and is tightened by a nut. The plurality of COF suction plates 142 are fixed to the suction plate frame 141 by the screws. The installation angle of the COF suction plate 142 can be adjusted by adjusting the position of the screw in the stepped long slot hole 144 to adapt to the support of display substrates of different shapes.

[0031] The COF suction plate 142 is also provided with an auxiliary suction nozzle 145 for increasing the suction force of the COF suction plate 142 .

[0032] The COF adsorption auxiliary bracket 14 is connected to the main negative pressure substrate 11 by using pins 146 and threaded holes 147, achieving a repetitive disassembly and assembly accuracy within 0.1 mm. The COF support plate is used when performing FOF bonding operations, and is not used when performing FOG bonding operations. The COF support plate needs to be disassembled and assembled when switching models. After using multiple sets of COF support plates to adjust the corresponding FOF process model, the use of pins 145 and threaded holes 146 for disassembly and assembly can speed up the time of changing models.

[0033] Example 2

[0034] Based on the structure of Example 1, in Example 2, the large-size bonding workbench also includes an adjustment mechanism 2, and the adjustment mechanism 2 includes an X-direction servo motion mechanism 21, a Y-direction servo motion mechanism 22, a Z-direction servo motion mechanism 23 and a θ-direction servo motion mechanism 24 arranged from bottom to top, and the support mechanism 1 is arranged on the θ-direction servo motion mechanism 24. The adjustment mechanism 2 can drive the support mechanism 1 to move in the X-direction, Y-direction and Z-direction and rotate in the θ-direction.

[0035] During pre-pressing and main pressing, the workbench also needs to cross the pad strip mechanism under the pressure head. In order to prevent the support mechanism 1 from colliding with the lower pad during the alignment process, the present invention uses a steel wire 151 structure to support the FPC. The tension of the steel wire 151 is ensured by using a tensioning mechanism 13, so that the FPC support platform is not only very thin but also light, reducing the total inertia of the platform. At the same time, the damage to the mechanism during collision is avoided, and even if the support mechanism 1 collides with the lower pad mechanism during alignment, no damage to the parts will be caused.

[0036] The present invention realizes the lightweight design of the FPC support mechanism 1, reduces the inertia of the platform, and at the same time, the steel wire 151 supports the same or slightly higher than the highest point of the lower pad. Figure 8 As shown, the collision between the two mechanisms during the alignment process is avoided, meeting the design requirements of the bonding machine.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, component splitting or combination, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A medium to large size bonding workbench, characterized by: It includes a supporting mechanism, which includes a main negative pressure substrate, a glass rear supporting frame and a tensioning mechanism are installed on one side of the main negative pressure substrate, and a COF adsorption auxiliary frame and a steel wire supporting frame are installed on the other side; the glass rear supporting frame is used to support the part of the display substrate that is larger than the main negative pressure substrate, the COF adsorption auxiliary frame includes a suction plate frame and a plurality of COF suction plates installed on the suction plate frame, the steel wire supporting frame includes a steel wire and two parallel supporting plates, a row of grooved guide wheels are installed at the lower end of the supporting plate, the steel wire is stretched between the two supporting plates through the two rows of grooved guide wheels, and the head end of the steel wire is fixed to the front end of one of the supporting plates, and the tail end is locked by the tensioning mechanism, and the tensioning force of the steel wire can be adjusted by the tensioning mechanism, so that the steel wire is always in the best tensioning state.

2. A medium to large size bonding workbench according to claim 1, characterized in that: The glass rear support frame includes two parallel brackets, each of which is provided with a first T-slot along its length direction. The bracket is connected to the main unit via a nut arranged in the first T-slot. The bracket is provided with an anti-static support block for supporting the glass. The two brackets are connected via a connecting rod, which can increase the rigidity of the glass rear support frame.

3. A medium to large size bonding workbench according to claim 1, characterized in that: The tensioning mechanism includes an L-shaped tensioning seat fixed on the side of the main negative pressure base plate, the side plate of the L-shaped tensioning seat is provided with an adjusting screw hole, the adjusting screw hole is provided with an adjusting bolt, the tail end of the adjusting bolt is provided with a wire sleeve for connecting a steel wire, and a limiting nut is provided on the side of the L-shaped tensioning seat side plate close to the adjusting bolt head.

4. A medium to large size bonding workbench according to claim 1, characterized in that: A plurality of the COF suction plates are mounted on the suction plate frame by screws, a second T-slot is provided on the suction plate frame along its length direction, a stepped long slot hole is provided on the COF suction plate, the head of the screw is clamped in the second T-slot, the tail of the screw passes through the stepped long slot hole and is locked by a nut, and a plurality of the COF suction plates are fixed to the suction plate frame by the screws, and the installation angle of the COF suction plate can be adjusted by adjusting the position of the screw in the stepped long slot hole.

5. A medium to large size bonding workbench according to claim 4, characterized in that: The COF suction plate is also provided with an auxiliary suction nozzle for increasing the suction force of the COF suction plate.

6. A medium to large size bonding workbench according to claim 1, characterized in that: The COF adsorption auxiliary bracket is connected to the main negative pressure substrate by using pins and threaded holes.

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