A traction short roller and a method of forming the same

Abstract

The application discloses a traction short roller, two metal pressing discs are arranged to press a heat-resistant fiber disc from two sides in the axial direction, two metal blocking discs are arranged to abut against the edges of the end walls of the heat-resistant fiber disc in the axial direction, and the edges of the end walls of the heat-resistant fiber disc are completely arranged in the two metal blocking discs during pressure application by a hydraulic device, so that the heat-resistant fiber disc is uniformly and sufficiently pressed, the problem of insufficient extrusion of the heat-resistant fiber disc outside the two metal pressing discs, the problem of outward turning of the heat-resistant fiber disc or even the problem of edge explosion are avoided, the two metal blocking discs are fixed by bolt connection, when the heat-resistant fiber disc is sintered, the two metal blocking discs can be disassembled by loosening the bolts, the processing and use of the convex outer circumferential surface formed after sintering of the heat-resistant fiber disc are not affected, the problems of uneven wear and short service life of the glass traction short roller in actual production are effectively improved, product yield, equipment utilization rate and spare part loss are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal glass production equipment, and relates to a forming method of a pulling short roller for a liquid crystal glass substrate, in particular to a pulling short roller and a forming method thereof. BACKGROUND

[0002] In the forming process of the overflow downdraw glass ribbon, an external force needs to be used to continuously pull the glass at a constant speed in the annealing furnace. The device that directly contacts the glass substrate to complete the pulling action is a pulling short roller. The glass substrate is extruded by the cylindrical boss working surface of the two pulling short rollers, the friction force is generated by the forward pressure, and the rotation speed of the roller shaft is continuously transmitted to the glass substrate by relying on the rotation of the pulling short roller, so as to control the movement speed of the glass substrate forming.

[0003] With the continuous upgrading of domestic liquid crystal glass production lines to G8.5 high generations, the area and weight of single glass substrate increase, the pulling amount and the substrate pulling forming speed are greatly improved. In order to obtain a glass substrate with very small thickness difference and qualified warping, the consistency of the cylindrical degree of the pulling short roller boss needs to be improved, and the matching consistency of the wear speed of the pulling short roller boss distributed in the annealing furnace also needs to be considered. At the same time, continuous production also needs to focus on how to reduce the wear amount of the pulling short roller boss per unit time. Since the above factors are closely related to the material quality of the pulling short roller boss, how to stabilize and improve the cladding quality of the pulling short roller is a key problem to be solved.

[0004] The existing glass pulling short roller cladding method uses a device as shown in Figure 1 A plurality of finished heat-resistant fiber discs are worn on the roller shaft, and a metal pressing disc is arranged on both sides of the heat-resistant fiber disc to clamp the heat-resistant fiber disc in the middle, and the clamping limit is provided by the self-locking nut at the top. Then, the hydraulic device is used to press the two metal pressing discs to realize the pressing of the heat-resistant fiber disc. After pressing, the heat-resistant fiber disc needs to be sent to the sintering furnace for sintering. Finally, according to the design drawing, the sintered heat-resistant fiber boss is machined in mechanical size to obtain the glass pulling short roller to be used.

[0005] Since the actual working surface of the glass traction roller is the outer circular surface of the heat-resistant fiber protrusion, and this outer circular surface still needs processing after sintering, the diameter of the metal pressure plate must be smaller than the diameter of the heat-resistant fiber protrusion. When using the existing coating process to press the heat-resistant fiber sheet, the heat-resistant fiber discs outside the diameter range of the metal pressure plate will not be sufficiently compressed, causing them to flip outwards or even crack. When the coating pressure is too high, the heat-resistant fiber discs at the edges of the two metal pressure plates may even be subjected to a shear-like damaging effect along the virtual interface formed by the outer circle of the metal pressure plate, causing the microstructure of the heat-resistant fiber protrusion to be damaged before sintering. The actual point of friction with the glass substrate is precisely the outer layer of heat-resistant fiber protrusions outside the diameter range of the metal pressure plate. The different degrees of compression result in different densities and hardnesses in the protrusion material, thus affecting the wear rate and lifespan of the glass traction roller. Summary of the Invention

[0006] To address the technical problems existing in the background art, this invention proposes a traction short roller and its forming method, which achieves consistent material pressure on the heat-resistant fiber protrusions of the traction short roller during the pressing and coating process, and homogenization of overall density after sintering.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A traction short roller includes a roller shaft, a stack of multiple heat-resistant fiber discs coaxially stacked on the roller shaft, and a first pressure plate and a second pressure plate that respectively press and fix the middle of the end walls of the stack from both axial sides of the stack. It also includes auxiliary tooling, which includes a first baffle and a second baffle that are detachably mounted on the roller shaft. The first baffle and the second baffle are located on both axial sides of the stack and press against the end walls of the stack. The abutment area between the first baffle and the second baffle and the end walls of the stack at least covers the edges of the end walls of the stack.

[0009] Furthermore, the first pressure plate is positioned by a positioning shoulder on the roller shaft, and the second pressure plate is positioned by a self-locking nut threaded onto the roller shaft.

[0010] Furthermore, the first baffle has a first through hole at its center for fitting onto the roller shaft and a first groove that cooperates with the first pressure plate. When the first baffle is fitted onto the roller shaft, the first pressure plate is inserted into the first groove to position the first baffle. The second baffle has a second through hole at its center for fitting onto the roller shaft and a second groove that cooperates with the second pressure plate. When the second baffle is fitted onto the roller shaft, the second pressure plate is inserted into the second groove to position the second baffle.

[0011] Furthermore, the first and second baffles are fixed together by a first bolt.

[0012] Furthermore, the first baffle has first threaded countersunk holes evenly distributed around its outer circumference, and the second baffle has first circular through holes evenly distributed around its outer circumference corresponding to the first threaded countersunk holes. The first bolt passes through the first circular through holes and is threadedly connected to the first threaded countersunk holes.

[0013] Furthermore, the auxiliary tooling also includes a clamping ring detachably disposed between the first baffle and the second baffle, the clamping ring being located on the radial circumference of the stack and pressing against the radial circumference arc surface of the stack.

[0014] Furthermore, the clamping ring is composed of multiple sector-shaped rings spliced ​​together, and adjacent sector-shaped rings are connected and fixed by a second bolt.

[0015] Furthermore, both ends of the fan-shaped ring are provided with protruding edges. A second threaded countersunk hole is provided on the protruding edge at one end of the fan-shaped ring, and a second circular through hole is provided on the protruding edge at the other end. The second bolt passes through the second circular through hole and is threadedly connected to the second threaded countersunk hole.

[0016] A method for forming a traction short roller includes the following steps:

[0017] The laminated sheets are sintered to form bosses on the rollers;

[0018] Disassembling the auxiliary tooling allows for the formation of a traction short roller with a raised edge that will not warp.

[0019] The beneficial effects of this invention are:

[0020] 1. The traction short roller provided by the present invention presses the heat-resistant fiber disc from both sides of the axial direction by setting two metal pressure plates, and then sets two metal baffles to abut against the edges of the end walls of the heat-resistant fiber disc on both sides of the axial direction. During the pressure application by the hydraulic device, since the edges of the end walls of the heat-resistant fiber disc on both sides of the axial direction are completely within the two metal baffles, the pressure is uniform and sufficient. This avoids the problem of insufficient compression of the heat-resistant fiber disc outside the range of the two metal pressure plates, which can cause the heat-resistant fiber disc to flip outward or even break at the edges. Furthermore, the two metal baffles are fixed together by bolts. After the heat-resistant fiber disc is sintered, the two metal baffles can be disassembled simply by loosening the bolts, without affecting the processing and use of the outer circular surface of the boss formed after the heat-resistant fiber disc is sintered.

[0021] 2. The traction short roller provided by the present invention has grooves in the center of the two metal baffles that cooperate with the two metal pressure plates, so that the metal pressure plates and metal baffles are flush with the planes in contact with the heat-resistant fiber sheets. Therefore, the heat-resistant fiber discs are pressed more evenly during the application of pressure by the hydraulic device, which further improves the coating quality of the traction short roller.

[0022] 3. The traction short roller provided by the present invention, by setting a clamping ring between two metal baffles to clamp the outer surface of the heat-resistant fiber disc, during the process of applying pressure using a hydraulic device, since the heat-resistant fiber disc is limited in the axial direction by the two metal baffles and in the radial direction by the clamping ring, it is more fully compressed in a limited space, thereby further improving the quality of the traction short roller coating.

[0023] 4. The traction short roll forming method provided by this invention, based on the traditional glass traction short roll coating process and method, utilizes an auxiliary device to press the heat-resistant fiber material of the glass traction short roll, so as to achieve a consistent degree of pressure on the heat-resistant fiber protrusions of the glass traction short roll during the pressing and coating process, and to homogenize the density of the overall coating material after sintering. This improves the problems of uneven wear and short life of glass traction short rolls in actual production, and can effectively improve product yield, equipment uptime, and reduce spare parts wear. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the existing traction short roller before forming.

[0025] Figure 2 This is a half-sectional schematic diagram of the traction short roller with auxiliary tooling before forming according to the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the first baffle of the present invention.

[0027] Figure 4 This is a schematic diagram of the structure of the second baffle of the present invention.

[0028] Figure 5 This is a schematic diagram of the clamping ring of the present invention. 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] like Figures 2-5As shown, the present invention provides a traction short roller, including a roller shaft 6, on which a first pressure plate 5, a second pressure plate 2, and a stacked sheet 4 composed of multiple heat-resistant fiber discs coaxially stacked are mounted. The first pressure plate 5 and the second pressure plate 2 are located on both axial sides of the stacked sheet 4 and press and fix the middle of the end walls on both axial sides of the stacked sheet 4. The first pressure plate 5 is positioned by a positioning shoulder on the roller shaft 6, and the second pressure plate 2 is positioned by a locking nut 1 threaded to the roller shaft 6. The first pressure plate 5 and the second pressure plate 2 are annular structures with the same outer diameter. Since the actual working surface of the traction short roller is the outer circular surface of the boss formed after the stacked sheet 4 is sintered, and the outer circular surface of the stacked sheet 4 after sintering still needs to be processed, the diameter of the outer circular surface of the stacked sheet 4 is larger than the outer diameter of the first pressure plate 5 and the second pressure plate 2.

[0031] The roller 6 is also provided with detachable auxiliary tooling, which includes a first baffle 7 and a second baffle 11 detachably mounted on the roller 6, and a clamping ring 9 detachably disposed between the first baffle 7 and the second baffle 11.

[0032] The first baffle 7 and the second baffle 11 are located on both sides of the stacked plate 4 along the axial direction and press against the end walls of the stacked plate 4 along the axial direction. The abutment area between the first baffle 7 and the second baffle 11 and the end walls of the stacked plate 4 at least covers the edges of the end walls of the stacked plate 4 along the axial direction. The first baffle 7 is sleeved on the outside of the first pressure plate 5, and the second baffle 11 is sleeved on the outside of the second pressure plate 2. The diameter of the outer circular surface of the stacked plate 4 is smaller than the outer diameter of the first baffle 7 and the second baffle 11. During the application of pressure using the hydraulic device, since the stacked plate 4 is completely within the first baffle 7 and the second baffle 11, it is subjected to uniform and sufficient pressure, avoiding the problem of insufficient compression of the stacked plate 4 outside the range of the first pressure plate 5 and the second pressure plate 2, and the stacked plate 4 flipping outward or even bursting at the edge. The first baffle 7 and the second baffle 11 are connected and fixed by the first bolt 3. After the stacked plate 4 is sintered, the first baffle 7 and the second baffle 11 can be disassembled simply by loosening the first bolt 3, without affecting the processing and use of the outer circular surface of the boss formed after the stacked plate 4 is sintered.

[0033] The first baffle 7 has a first groove 13 that cooperates with the first pressure plate 5 and a first through hole 14 that cooperates with the roller 6. The first baffle 7 is sleeved on the roller 6 through the first through hole 14, and the first pressure plate 5 is inserted into the first groove 13, so that the first pressure plate 5 and the first baffle 7 are flush with the plane of the stacked pieces 4. The second baffle 11 has a second groove 16 that cooperates with the second pressure plate 2 and a second through hole 17 that is compatible with the locking nut 1, so that the locking nut 1 can freely pass through the second through hole 17. The second pressure plate 2 is sleeved on the roller 6 through the second through hole 17, and the second pressure plate 2 is inserted into the second groove 16, so that the plane of the second pressure plate 2 and the second baffle 11 are flush with the plane of the stacked pieces 4. Thus, during the application of pressure by the hydraulic device, the stacked pieces 4 are pressed more evenly, further improving the quality of the traction short roller coating.

[0034] The first baffle 7 has a first threaded countersunk hole 12 evenly distributed around its outer circumference, and the second baffle 11 has a first circular through hole 15 evenly distributed around its outer circumference, corresponding to the first threaded countersunk hole 12. The first bolt 3 passes through the first circular through hole 15 and is threadedly connected to the first threaded countersunk hole 12, thereby locking and fixing the first baffle 7 and the second baffle 11.

[0035] The clamping ring 9 is located on the radial circumference of the stacked sheet 4 and presses against the radial circumference arc surface of the stacked sheet 4, clamping the outer arc surface of the stacked sheet 4. During the process of applying pressure using the hydraulic device, since the stacked sheet 4 is limited in the axial direction by the first baffle 7 and the second baffle 11 and in the radial direction by the clamping ring 9, it is more fully compressed in the limited space, further improving the quality of the traction short roller coating.

[0036] The clamping ring 9 is composed of four sector-shaped rings joined together. Adjacent sector-shaped rings are connected and fixed by a second bolt 8, which makes it easier to install the clamping ring 9 on the outer surface of the stacked plate 4. Clamping is achieved by tightening the second bolt 8. Both ends of the sector-shaped rings are provided with protruding edges. A second threaded countersunk hole is provided on the protruding edge at one end of the sector-shaped ring, and a second circular through hole is provided on the protruding edge at the other end. The second bolt 8 passes through the second circular through hole and is threadedly connected to the second threaded countersunk hole to lock and fix two adjacent sector-shaped rings.

[0037] The traction short roller assembly steps provided by this invention are as follows:

[0038] The first pressure plate is placed on the traction short roller shaft and positioned using the positioning shoulder. Then, multiple heat-resistant fiber sheets are placed on the first pressure plate, and a layer of heat-resistant fiber adhesive is evenly applied between any adjacent heat-resistant fiber sheets. Then, they are stacked layer by layer on the first pressure plate.

[0039] Place the second pressure plate onto the traction short roller shaft, clamp the heat-resistant fiber sheet between the first and second pressure plates, and tighten the self-locking nut to position the second pressure plate.

[0040] The clamping rings are arranged in a circular shape around the heat-resistant fiber sheet. The adjacent fan-shaped rings of the clamping rings are connected with the second bolts so that the clamping rings clamp the outer arc surface of the heat-resistant fiber sheet.

[0041] The first baffle is placed on the traction short roller shaft from the outside of the first pressure plate, and the first pressure plate is inserted into the first groove so that the first pressure plate and the first baffle are flush with the plane in contact with the heat-resistant fiber sheet. Similarly, the second baffle is placed on the traction short roller shaft from the outside of the second pressure plate, and the second pressure plate is inserted into the second groove so that the second pressure plate and the second baffle are flush with the plane in contact with the heat-resistant fiber sheet. Then the first baffle and the second baffle are connected using the first bolt.

[0042] Tighten the second bolts between each adjacent sector ring of the clamping ring, apply pressure using a hydraulic device, tighten the first bolt between the first and second baffles and the self-locking nut, and repeat the above steps until the pressure value or extrusion size reaches the predetermined set value.

[0043] The present invention also provides a method for forming the above-mentioned traction short roller, comprising the following steps:

[0044] The laminate 4 is sintered to form a boss on the roller 6;

[0045] Disassembling the auxiliary tooling allows for the formation of a traction short roller with a raised edge that will not warp.

[0046] The forming method of the traction short roller provided by this invention, based on the traditional glass traction short roller coating process and method, utilizes an auxiliary device to press the heat-resistant fiber material of the glass traction short roller, so as to achieve a consistent degree of pressure on the heat-resistant fiber protrusions of the glass traction short roller during the pressing and coating process, and to homogenize the density of the overall coating material after sintering. This improves the problems of uneven wear and short life of glass traction short rollers in actual production, and can effectively improve product yield, equipment uptime, and reduce spare parts wear.

[0047] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A traction short roller comprising a roller shaft (6), a laminated sheet (4) made of a plurality of heat-resistant fiber circular sheets coaxially stacked on the roller shaft (6), and a first pressure plate (5) and a second pressure plate (2) that respectively press and fix the middle portions of the end walls on the axial both sides of the laminated sheet (4), characterized in that, The auxiliary tooling includes a first baffle disc (7) and a second baffle disc (11) which are detachably mounted on the roller shaft (6), are located on the axial two sides of the laminated sheet (4) and are tightly pressed against the end walls on the axial two sides of the laminated sheet (4), and the abutting areas between the first baffle disc (7) and the second baffle disc (11) and the end walls of the laminated sheet (4) cover at least the edges of the end walls on the axial two sides of the laminated sheet (4).

2. A short roll for traction according to claim 1, characterized in that The first pressing disc (5) is positioned by a positioning shaft shoulder on the roller shaft (6), and the second pressing disc (2) is positioned by a self-locking nut (1) which is screwed on the roller shaft (6).

3. A short roll for traction according to claim 1, characterized in that The first baffle disc (7) is provided with a first through hole (14) for sleeving on the roller shaft (6) and a first groove (13) which cooperates with the first pressing disc (5), and when the first baffle disc (7) is sleeved on the roller shaft (6), the first pressing disc (5) is inserted into the first groove (13) to position the first baffle disc (7); the second baffle disc (11) is provided with a second through hole (17) for sleeving on the roller shaft (6) and a second groove (16) which cooperates with the second pressing disc (2), and when the second baffle disc (11) is sleeved on the roller shaft (6), the second pressing disc (2) is inserted into the second groove (16) to position the second baffle disc (11).

4. A short roll for traction according to claim 3, characterized in that The first baffle disc (7) and the second baffle disc (11) are connected and fixed by a first bolt (3).

5. A short roll for traction according to claim 4, characterized in that The first baffle disc (7) is uniformly provided with a first threaded counterbore (12) on the outer periphery, the second baffle disc (11) is uniformly provided with a first circular through hole (15) corresponding to the first threaded counterbore (12) on the outer periphery, and the first bolt (3) is screwed through the first circular through hole (15) and the first threaded counterbore (12).

6. A short roll for traction according to claim 1, characterized in that The auxiliary tooling further includes a clamping ring (9) which is detachably arranged between the first baffle disc (7) and the second baffle disc (11), and the clamping ring (9) is located on the radial circumferential side of the laminated sheet (4) and is tightly pressed against the arc surface on the radial circumferential side of the laminated sheet (4).

7. A short roll for traction according to claim 6, characterized in that The clamping ring (9) is formed by splicing a plurality of fan-shaped ring bodies, and adjacent two fan-shaped ring bodies are connected and fixed by a second bolt (8).

8. A short roll for traction according to claim 7, characterized in that The fan-shaped ring body is provided with a second threaded counterbore on the protruding edge at one end and a second circular through hole on the protruding edge at the other end, and the second bolt (8) is screwed through the second circular through hole and the second threaded counterbore.

9. A method of forming a traction short roller as claimed in any one of claims 1 to 8, characterised by, The method comprises the following steps: sintering the laminated sheet (4) to form a boss on the roller shaft (6); dismantling the auxiliary tooling to form a traction short roller with no edge lifting of the boss.

Images