Small-radius positive-bending arc-changing unit and forming equipment

Abstract

The utility model relates to a minor radius positive bend arc-changing unit and forming equipment, the positive bend arc-changing unit comprises a flexible shaft roller way, a support assembly and a plurality of height adjusting mechanisms, the flexible shaft roller way is supported above the support assembly through the plurality of height adjusting mechanisms, the support assembly comprises a lower support assembly and a middle support assembly, the middle of the flexible shaft roller way is connected with the middle supporting assembly. The height adjusting mechanism comprises a driving mechanism and a lead screw, the driving mechanism is connected with the lower supporting assembly through a lower hinge piece, and the top end of the lead screw is connected with the flexible shaft roller way through an upper hinge piece. The lower supporting assembly is provided with a moving space for the lead screw to penetrate through and swing. When the flexible shaft roller way is in a flattened initial state, the included angle between each lead screw and the horizontal direction is set to be beta, the lead screws located on the outermost sides of the two ends of the flexible shaft roller way are obliquely arranged, beta is larger than 90 degrees and smaller than or equal to 110 degrees, and the lower ends of the lead screws on the outermost sides are far away from the middle supporting assembly; the forming equipment comprises a plurality of positive bending arc-changing units. According to the utility model, positive bending arc changing with a smaller radius can be realized.

Description

Technical Field

[0001] The utility model belongs to the field of curved glass forming equipment, and particularly relates to a small-radius positive bending arc-changing unit and a forming equipment. Background Art

[0002] As Figure 1 shown in CN210029220U, a variable-curvature conveying roller path in the prior art, the soft-axis roller path 1 in the arc-changing unit is lifted and arc-adjusted by the lead screws 4 of a plurality of height-adjusting mechanisms 5. The driving mechanism of the height-adjusting mechanism is rotatably mounted on the support square tube 3 through a mounting seat. The top end of the lead screw 4 is connected to an elastic body through a hinge seat 6, and the elastic body supports the soft-axis roller path 1 through a soft-axis support 2. When the arc is changed in use of this mechanism, while the lead screw 4 moves up and down, the hinge seat 6 rotates around the hinge point of the movable end of the lead screw 4, and drives the elastic member 11 and the soft-axis roller path 1 to change the arc.

[0003] In this disclosed patent, in the initial state where the soft-axis roller path is flattened, the lead screw is vertically arranged, and the degree of deformation of the soft-axis roller path that can be driven is limited. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a small-radius positive bending arc-changing unit and a forming equipment, and the arc-changing unit can realize positive bending arc-changing with a smaller radius.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a small-radius positive bending arc-changing unit, including a soft-axis roller path, a support assembly and a plurality of height-adjusting mechanisms. The soft-axis roller path is supported above the support assembly through a plurality of height-adjusting mechanisms. The support assembly includes a lower support assembly and a middle support assembly. The middle support assembly is connected to the middle of the lower support assembly. The middle of the soft-axis roller path is supported above the middle support assembly. The height-adjusting mechanism includes a driving mechanism and a lead screw. The driving mechanism is connected to the lower support assembly through a lower hinge. The top end of the lead screw is connected to the soft-axis roller path through an upper hinge. An activity space for the lead screw to pass through and swing is arranged on the lower support assembly. When the soft-axis roller path is in the initial flattened state, let the included angle between the lead screw and the horizontal direction be β. The outermost lead screws at both ends of the soft-axis roller path are obliquely arranged. The included angle between the outermost lead screw and the horizontal direction is 90° < β ≤ 110°, and the lower end of the outermost lead screw is far away from the middle support assembly.

[0006] The beneficial effect of the utility model is: by obliquely arranging the outermost lead screws in the initial state, the positive bending arc-changing unit of the utility model gives more space for the driving of the lead screws, can realize a greater amplitude of deformation of the soft-axis roller path pushed by the lead screws, form glass with a smaller radius, and improve the arc-forming ability of the equipment.

[0007] Further, when the flexible shaft roller path is in the initial flattened state, multiple said lead screws are all inclined, and the lead screw closer to the middle of the lower support assembly has a smaller angle β with the horizontal direction, and β ≥ 90°.

[0008] The beneficial effect is that all the lead screws are inclined, which can make the arc after the positive bending of the flexible shaft roller path smoother, contributing to the improvement of the glass forming quality; the deformation degree of the part near the middle of the flexible shaft roller path during positive bending is small, so the corresponding angle β can be smaller, but β ≥ 90°.

[0009] Further, the angle β between the lead screw adjacent to the middle support assembly and the horizontal direction is β = 90°.

[0010] The beneficial effect is that the deformation degree of the part near the middle of the flexible shaft roller path during positive bending is small, so the corresponding angle β can be 90°.

[0011] Further, when the flexible shaft roller path is in the initial flattened state, the distance between two adjacent lead screws among multiple said lead screws is 400 mm - 500 mm.

[0012] The beneficial effect is that this setting of the lead screw arrangement interval makes the distribution of the arc-changing points driven by the lead screws on the flexible shaft roller path more reasonable, making the arc of the flexible shaft roller path more smooth.

[0013] Further, it further includes an elastic member and a flexible shaft support. The elastic member is arranged parallel to the flexible shaft roller path. The flexible shaft roller path is fixed on the elastic member through the flexible shaft support, and the elastic member is connected to the lead screw through the upper hinge member.

[0014] The beneficial effect is that the setting of the elastic member and the flexible shaft support can improve the arc-forming accuracy of the flexible shaft roller path. The lead screw drives the elastic member to deform to drive the flexible shaft roller path to form an arc, further making the arc of the flexible shaft roller path smoother, improving the arc-forming accuracy, and improving the glass forming quality.

[0015] Further, the lead screws on the left and right sides of the middle of the lower support assembly are symmetrically arranged with respect to the middle support assembly.

[0016] The beneficial effect is that the symmetrical distribution of the lead screws can make the arcs on both sides of the middle part of the flexible shaft roller path symmetrical after forming an arc, so as to ensure the glass forming quality.

[0017] Further, the lower support assembly includes a left swing arm and a right swing arm. The inner ends of the left swing arm and the right swing arm are respectively hinged on both sides of the middle support assembly; the left swing arm and the right swing arm are connected to the driving mechanism of the height adjustment mechanism through the lower hinge member.

[0018] The beneficial effects are as follows: realizing multi-stage adjustment of the soft-axis roller path to form an arc. Before forming the arc, first adjust the position of the swing arm to reduce the stroke of the screw rod for lifting and lowering, and then accurately form the arc through the height adjustment mechanism, further improving the ability of the soft-axis roller path to form an arc with a smaller radius and expanding the range of the arc radius.

[0019] Further, the upper hinge and the lower hinge are spherical bearings or hinge seats.

[0020] The beneficial effects are as follows: presenting the structural form of the hinge, which can be selected for use according to actual situations.

[0021] The present utility model further provides a forming device, including a plurality of arc-changing units arranged at intervals along the glass conveying direction, and the arc-changing unit is the above-mentioned positive-bending arc-changing unit.

[0022] The beneficial effects are as follows: Each positive-bending arc-changing unit can form an arc independently, so that multiple positive-bending arc-changing units can cooperate to achieve different functions. For example, when the arc-changing radian of multiple positive-bending arc-changing units is the same, it can be used in the stabilizing section of bent glass production to stabilize the shape of the already bent glass; when the arc-changing radian of multiple positive-bending arc-changing units gradually changes along the glass conveying direction, it can be used in the gradual-changing section of bent glass production to enable the glass to gradually form when passing through. The device has a wider range of uses and a wider range of glass arc radii. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the arc-changing unit in the prior art;

[0025] Figure 2 It is a schematic structural diagram of the positive-bending arc-changing unit of the present utility model in Embodiment 1;

[0026] Figure 3 It is a schematic structural diagram of the positive-bending arc-changing unit of the present utility model in Embodiment 2;

[0027] Figure 4 It is a schematic diagram of the force condition at the upper hinge during positive-bending arc formation when the outermost screw rod in the positive-bending arc-changing unit of the present utility model takes the vertical state as the initial state;

[0028] Figure 5 It is a schematic diagram of the force condition at the upper hinge during positive-bending arc formation when the outermost screw rod in the positive-bending arc-changing unit of the present utility model takes the inclined state as the initial state;

[0029] Figure 6 It is a schematic structural diagram of the positive bending and arc-changing unit described in the present utility model in Embodiment 3;

[0030] Markings in the figure: 1. Flexible shaft roller path, 2. Flexible shaft support, 3. Support square tube, 4. Lead screw, 5. Driving mechanism, 6. Hinge seat, 7. Upper hinge member, 8. Lower support assembly, 9. Lower hinge member, 10. Middle support assembly, 11. Elastic member. Specific embodiments

[0031] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it is not used as a basis for any limitation of the utility model.

[0032] Embodiment 1: As Figure 2 shown, a small-radius positive bending and arc-changing unit includes a flexible shaft roller path 1, a flexible shaft support 2, a support assembly, and a plurality of height adjustment mechanisms. The support assembly includes a lower support assembly 8 and a middle support assembly 10. The middle support assembly 10 is connected to the middle of the lower support assembly 8, and the middle of the flexible shaft roller path 1 is supported above the middle support assembly 8. A plurality of flexible shaft supports 2 are arranged at intervals along the length direction of the flexible shaft roller path 1. The flexible shaft roller path 1 can rotate on the flexible shaft support 2. The flexible shaft roller path 1 includes a flexible shaft and a plurality of rollers for conveying glass installed on the flexible shaft. The height adjustment mechanism includes a lead screw 4 and a driving mechanism 5 that drives the lead screw 4 to move up and down linearly. The driving mechanism 5 is rotatably installed on the lower surface of the lower support assembly 8 through a lower hinge member 9. The lead screw 4 passes through the lower support assembly 8, and the top end of the lead screw 4 is connected to the flexible shaft support 2 through an upper hinge member 7. The driving mechanism 5 drives the lead screw 4 to move up and down linearly, and the lead screw 4 drives the flexible shaft roller path 1 to bend upward and deform, realizing the positive bending of the flexible shaft roller path 1. While the lead screw 4 moves up and down, the connection between the top end of the lead screw 4 and the upper hinge member 7 and the driving part of the height adjustment mechanism 5 and the lower hinge member 9 can rotate accordingly, thereby increasing the degree of positive bending and forming small-radius glass.

[0033] When the flexible shaft roller path is in the initial flattened state, let the angle between the lead screw 4 and the horizontal direction be β. The outermost lead screws 4 at both ends of the flexible shaft roller path 1 are inclined. The angle between the outermost lead screws 4 and the horizontal direction is 90° < β ≤ 110°, and the lower end of the outermost lead screw 4 is far from the middle of the lower support assembly 8, that is, far from the middle support assembly 10. By arranging the outermost lead screws 4 inclined in the initial state, the positive bending and arc-changing unit of the present utility model gives more space for the drive of the lead screw 4, can achieve a greater deformation amplitude of the lead screw 4 pushing the flexible shaft roller path 1, form glass with a smaller radius, and improve the arc-forming ability of the equipment. By arranging the lead screw 4 inclined, the deformable degree of the positive bending can be further increased to form glass with a smaller radius.

[0034] In the selection of the angle β between the outermost lead screw 4 and the horizontal direction in the initial state, where 90° < β ≤ 110°, for a soft shaft roller path 1 of a certain length L, the minimum radius that can be formed is fixed, i.e., R min = L / π. When the initial state is selected with 90° < β ≤ 110°, the lead screw 4 can drive the soft shaft roller path 1 to arc to the minimum radius, and when arcing to the minimum radius, the lead screw 4 can still give the soft shaft roller path 1 sufficient thrust for arcing. Within this range, the purpose of arcing the current soft shaft roller path to its minimum radius can be achieved. In addition, the larger β is, the more the position of the driving mechanism 5 on the lower support assembly 8 deviates from the middle of the lower support assembly 8, and may exceed the end position of the soft shaft roller path 1, which puts more requirements on the assembly space of the arcing unit and is not conducive to assembly and installation. Therefore, the angle between the outermost lead screw 4 and the horizontal direction in the initial state is determined to be 90° < β ≤ 110°.

[0035] In this embodiment, specifically, β of the outermost lead screw in the initial state is selected as 92° and 110°, which can further increase the deformability, realize the arcing of the soft shaft roller path 1 to the minimum radius, and the position of the driving mechanism 5 of its height adjustment mechanism will not have an adverse impact on the assembly.

[0036] In this embodiment, the middle support assembly 10 is vertically connected to the lower support assembly 8 and is located in the middle of the lower support assembly 8, forming an inverted T-shaped support structure. The middle rotating mechanism of the soft shaft roller path 1 is arranged at the top of the middle support assembly 8. Alternatively, the lower end face of the middle support assembly 8 can also be flush with the lower end face of the lower support assembly.

[0037] In this embodiment, the upper hinge 7 and the lower hinge 9 can be spherical bearings or hinge seats.

[0038] In this embodiment, the driving mechanism 5 includes a motor and a transmission reduction gear. The motor transmits power to the lead screw through the transmission reduction gear, and the transmission reduction gear is connected to the lower support assembly 8 through the lower hinge 9. The main body of the lower support assembly 8 can be selected as a support square tube. The lower hinge 9 can be a hinge seat, and the transmission reduction gear is hinged to the hinge seat. Alternatively, the driving mechanism 5 can also be a through-shaft motor with a built-in lead screw nut that can transmit power to the lead screw, and this motor is hinged to the hinge seat.

[0039] In this embodiment, the lower support assembly 8 is provided with a slot for the lead screw 4 to pass through. The slot is elongated to allow the lead screw 4 to swing within a certain range. Or, the lower support assembly 8 is a hollow structure, and the lead screw 4 can pass through the hollow structure and can swing relatively.

[0040] In this embodiment, in the initial state, the other lead screws 4 are still vertically arranged, that is, the other lead screws 4 are perpendicular to the flattened soft shaft roller path 1. When the middle part of the soft shaft roller path 1 is bent forward, the degree of deformation is small, so the corresponding angle β can be 90°.

[0041] When the soft shaft roller path 1 is in the flattened initial state, the distance between two adjacent lead screws 4 among the multiple lead screws 4 is 400 mm - 500 mm. The beneficial effect is that such an arrangement interval of the lead screws 4 makes the distribution of the arc-changing points of the drive of the lead screws 4 on the soft shaft roller path 1 more reasonable, and makes the arc shape of the soft shaft roller path 1 more smooth.

[0042] In this embodiment, the middle part of the soft shaft roller path can be connected to the middle support assembly through the soft shaft middle transmission structure provided in the middle part of the soft shaft roller path, or the middle part of the soft shaft roller path can be connected to the middle support assembly through the soft shaft support.

[0043] Embodiment 2: As Figure 3 shown, compared with Embodiment 1, the difference in this embodiment is that the forward-bending arc-changing unit further includes an elastic member 11. The elastic member 11 is clamped between the soft shaft support 2 and the upper hinge member 7, and the middle part of the elastic member 11 is fixed on the middle support assembly 10 or the middle transmission mechanism on the middle support assembly. During the lifting process of the lead screw 4, the soft shaft roller path 1 bends into an arc synchronously with the bending of the elastic member 11. The setting of the elastic member 11 makes the soft shaft roller path 1 smoother after bending into an arc, which helps to improve the arc-forming accuracy and quality of the bent glass.

[0044] The elastic member 11 can be selected as a spring steel plate or spring steel wire. When using spring steel wire, generally multiple spring steel wires are arranged in parallel and used as one elastic member 11.

[0045] Next, around Figure 4 and Figure 5 it is explained the principle that the lead screw 4 in the initial state being inclined can increase the degree of deformation of the forward bending of the soft shaft roller path 1.

[0046] As Figure 4 、 5As shown in the figure, define the included angle between the tangent line corresponding to the arc-changing point at the intersection of the lead screw 4 and the elastic member 11 as α. The arc-changing point on the elastic member 11 can be understood as the connection position between the upper hinge member 7 and the elastic member 11. The elastic member 11 is parallel to the flexible shaft roller path 1, and the elastic member 11 changes its arc and synchronously drives the flexible shaft roller path 1 to change its arc through the flexible shaft support 2. The magnitude of the included angle α is positively correlated with the thrust of the lead screw driving the elastic member 11 in the moving direction. When the included angle α decreases to 0°, the component force F1 of the lead screw 4 in the moving direction of the elastic member 11 is zero. At this time, when the lead screw 4 continues to rise, it cannot drive the elastic member 11 and the flexible shaft roller path 1 to further change their arcs. The degree to which the flexible shaft roller path 1 can change its arc theoretically reaches the maximum. However, in fact, because the lead screw 4 has to overcome the rigidity of the elastic member 11 and the flexible shaft roller path 1 itself to change the arc, when the included angle α approaches 0°, the arc-changing degree has already reached the maximum.

[0047] Figure 4 、 5 When the flexible shaft roller path 1 is in the initial flattened state, when the included angle β of the lead screw 4 is 90° and when the included angle β > 90°, when the elastic member 11 is bent and arcs to the same radius (i.e., when the flexible shaft roller path 1 is bent and arcs to the same radius), the magnitude of the included angle α and the force-bearing situation at the arc-changing point on the elastic member 11 are given respectively. The specific analysis is as follows.

[0048] (1) Figure 5 In the initial state, the included angle β between the lead screw 4 and the horizontal direction is 101°. During the arc-changing process, the included angle α between the lead screw 4 and the tangent line at the arc-changing point of the flexible shaft roller path 1 decreases slowly. Specifically, when the flexible shaft roller path 1 arcs to the radius R1, α = 51°, and the component force of the lead screw 4 in the moving direction of the flexible shaft roller path 1 is sufficient to make the flexible shaft roller path 1 continue to bend.

[0049] (2) Figure 4 In the initial state, the included angle β between the lead screw 4 and the horizontal direction is 90°. During the arc-changing process, the included angle α between the lead screw 4 and the tangent line at the arc-changing point of the flexible shaft roller path 1 decreases, and the decreasing speed is greater than that in case (1). Specifically, when the flexible shaft roller path 1 arcs to the radius R1, α = 46°, and the component force of the lead screw 4 in the moving direction of the flexible shaft roller path 1 is sufficient to make the flexible shaft roller path 1 continue to bend, but its component force is less than the component force of the lead screw 4 in the moving direction of the elastic member 11 in case (1).

[0050] From the above analysis of the positive bending and arc-changing, when the elastic member 11 arcs to an equal radius (i.e., when the flexible shaft roller path 1 arcs to an equal radius), when the included angle β between the outermost lead screw 4 and the horizontal direction is > 90° in the initial state, the included angle α between the lead screw 4 and the tangent line of the elastic member 11 is relatively larger, which can provide a greater component force in the moving direction of the elastic member 11. The degree to which the elastic member 11 drives the flexible shaft roller path 1 to be able to change its arc is greater, and the formed radius is smaller. Under the same output torque of the driving mechanism 5, the component force of the lead screw 4 acting in the moving direction of the elastic member 11 is sufficient to make the flexible shaft roller path 1 continue to bend, and a smaller bending radius can be obtained.

[0051] From the above analysis, during positive bending, at the initial state, the outermost lead screw 4 is inclined. The larger the included angle β, the more beneficial it is for positive bending to form an arc, and the greater the degree of arc formation, the smaller the radius of the positively bent glass that can be formed.

[0052] Figure 4 、 Figure 5 The above analysis is carried out on the basis that the arc-forming unit contains the elastic member 11. For the arc-forming unit without the elastic member 11, in the initial state, the outermost lead screw 4 of the flexible shaft roller path 1 is inclined as described above. Compared with the case where the outermost lead screw 4 is vertically arranged in the initial state, it can also provide a greater component force in the movement direction of the flexible shaft roller path 1 when the arc is formed to an equal radius, and the formed radius is smaller.

[0053] Embodiment 3: On the basis of the first structure of Figure 2 , the positive-bending arc-forming unit can also adopt the second structure as shown in Figure 6 . Except for the two outermost lead screws 4, the other lead screws 4 are also inclined, and the included angle β between the lead screw 4 closer to the middle support assembly 10 and the horizontal direction is smaller. Further, the lead screws 4 on the left and right sides of the middle support assembly 10 are symmetrically distributed.

[0054] All the lead screws 4 are inclined, which can make the arc of the flexible shaft roller path 1 smoother after positive bending, contributing to the improvement of the glass forming quality; the deformation degree of the part near the middle of the flexible shaft roller path 1 during positive bending is small, so the corresponding included angle β can be smaller, but it is necessary to ensure that β≥90°.

[0055] Embodiment 4: The positive-bending arc-forming unit of this embodiment optimizes the structure of the lower support assembly 8 on the basis of the above embodiments. The optimized lower support assembly 8 includes a left swing arm and a right swing arm. The inner ends of the left swing arm and the right swing arm are respectively hinged on both sides of the middle support assembly 10. The height adjustment mechanism is arranged on the left swing arm and the right swing arm. The left swing arm and the right swing arm are respectively controlled by corresponding swing arm drive mechanisms. At this time, the middle support assembly 10 is not vertically connected to the lower support assembly 8, and the lower end surface of the middle support assembly 10 can also be flush with the lower end surface of the lower support assembly 8.

[0056] During the arc-forming process, the positions of the left swing arm and the right swing arm can be adjusted by swinging first, so as to change the initial height of the height adjustment mechanism and the end of the flexible shaft roller path 1, and then the flexible shaft roller path can be accurately formed into an arc by the height adjustment mechanism, further expanding the range of the arc-forming radius of this positive-bending arc-forming unit, enabling the positive bending and forming of a curved glass with a smaller radius, and under the condition of the same arc-forming radius, the stroke of the lead screw 4 can be reduced.

[0057] Specifically, the positions of the left swing arm and the right swing arm are adjusted by swinging. Before the height adjustment structure drives the lead screw 4 to drive the elastic member 11 and the flexible shaft roller path 1 to accurately form an arc, the angle of the lead screw is adjusted by the left swing arm and the right swing arm first, so as to further improve the arc-changing ability of the positive bending and arc-changing unit.

[0058] Embodiment 5: A forming device includes a plurality of positive bending and arc-changing units described in the above embodiments, and the plurality of positive bending and arc-changing units are arranged at intervals along the glass conveying direction. When the arc-changing radian of the plurality of positive bending and arc-changing units is the same, it can be used for the stable section of bent glass production to stabilize the shape of the already bent glass; when the arc-changing radian of the plurality of positive bending and arc-changing units gradually changes along the glass conveying direction, it can be used for the gradual change section of bent glass production, so that the glass gradually forms when passing through.

[0059] By using a plurality of positive bending and arc-changing units, the device has a wider range of uses and a wider range of glass arc radii.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Those of ordinary skill in the art should understand that the specific implementation manners of the present invention can be modified or equivalently replaced by referring to the above embodiments. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention is within the protection scope of the claims pending for approval.

Claims

1. A small-radius positive-bending arc-changing unit, comprising a flexible shaft roller path, a support assembly, and a plurality of height adjustment mechanisms. The flexible shaft roller path is supported above the support assembly by means of the plurality of height adjustment mechanisms, and is characterized in that: The support assembly includes a lower support assembly and a middle support assembly. The middle support assembly is connected to the middle part of the lower support assembly, and the middle part of the flexible shaft roller path is supported above the middle support assembly. The height adjustment mechanism includes a driving mechanism and a lead screw. The driving mechanism is connected to the lower support assembly through a lower hinge, and the top of the lead screw is connected to the flexible shaft roller path through an upper hinge. An activity space for the lead screw to pass through and swing is provided on the lower support assembly. When the flexible shaft roller path is in the initial flattened state, let the angle between the lead screw and the horizontal direction be β. The outermost lead screws at both ends of the flexible shaft roller path are inclined, and the angle between the outermost lead screw and the horizontal direction is 90° < β ≤ 110°, and the lower end of the outermost lead screw is far away from the middle support assembly.

2. The positive bending and arc-changing unit according to claim 1, wherein: When the flexible shaft roller path is in the initial flattened state, multiple lead screws are all inclined, and the angle β between the lead screw closer to the middle support assembly and the horizontal direction is smaller, and β ≥ 90°.

3. The positive bending and arc-changing unit according to claim 1, characterized in that: The angle β between the lead screw adjacent to the middle support assembly and the horizontal direction is β = 90°.

4. The positive bending arc-changing unit according to claim 1, characterized in that: When the flexible shaft roller path is in the initial flattened state, the distance between two adjacent lead screws among multiple lead screws is 400 mm - 500 mm.

5. The positive bending and arc-changing unit according to claim 1, characterized in that: It further includes an elastic member and a flexible shaft support. The elastic member is arranged parallel to the flexible shaft roller path. The flexible shaft roller path is fixed on the elastic member through the flexible shaft support, and the elastic member is connected to the lead screw through the upper hinge.

6. The positive bending and arc-changing unit according to claim 1, wherein: The lead screws on the left and right sides of the middle part of the lower support assembly are symmetrically arranged with respect to the middle support assembly.

7. The positive bending and arc-changing unit according to any one of claims 1 to 6, characterized in that: The lower support assembly includes a left swing arm and a right swing arm. The inner ends of the left swing arm and the right swing arm are respectively hinged to both sides of the middle support assembly. The left swing arm and the right swing arm are connected to the driving mechanism of the height adjustment mechanism through a lower hinge.

8. The positive bending and arc-changing unit according to claim 1, characterized in that: The upper hinge and the lower hinge are spherical plain bearings or hinge seats.

9. A forming device includes a plurality of arc-changing units arranged at intervals along the glass conveying direction, characterized in that: The arc-changing unit is the positive-bending arc-changing unit according to any one of claims 1 - 8.

Images