A high-precision optical glass hot bending forming machine

Abstract

This invention provides a high-precision optical glass hot bending forming machine, including a housing, a guide tube, a roller, a forming mechanism, and a control unit. The guide tube penetrates the side plate of the housing and extends into the housing. One side of the housing is open, and the roller is rotatably mounted on the guide tube. A sealing cover is provided on one side of the roller. Multiple guide wheel frames are installed inside the housing, and the guide wheel frames abut against the outer circumference of the roller. A drive mechanism is installed inside the housing, which drives the roller to rotate by connecting to the outer ring of a bearing. A fixed cylinder is sleeved on the guide tube, and an infrared heating tube is provided on the outside of the fixed cylinder. Multiple forming mechanisms are located on the inner wall of the roller. The forming mechanism includes a mold, a fixing block, an electric push rod, an L-shaped plate, a pressure rod, and a pad. This invention features a forming mechanism located on the inner wall of the roller. Utilizing the centrifugal force generated when the roller rotates, the forming mechanism maintains contact with the curved surface of the mold, preventing the glass plate from warping due to cooling when the temperature drops, and improving the consistency of the curvature of the glass plate and the top arc surface of the mold.

Description

Technical Field

[0001] This utility model relates to the field of glass hot bending forming technology, and in particular to a high-precision optical glass hot bending forming machine. Background Technology

[0002] Head-up display (HUD) technology originated in the aviation field and was later applied to civil aircraft and automobiles. HUD systems have evolved from modular systems to windshield-type and augmented reality systems. These systems all require specialized high-precision glass to display information, driving the development of high-precision optical glass hot bending technology. Currently, there are three main types of high-precision optical glass hot bending equipment: gravity-fed hot bending equipment, pressure-fed hot bending equipment, and negative pressure adsorption hot bending equipment.

[0003] However, existing high-precision optical glass hot bending equipment has the following problems: Weight-bearing hot bending equipment suffers from insufficient bending force, resulting in a surface shape that is higher in the center and lower around the edges, making it difficult to achieve the optimal surface shape. Pressure-bearing hot bending equipment suffers from uneven downward pressure. Due to the characteristics of free-form surfaces, the glass thickness is uneven during hot bending, thus affecting the glass curvature and imaging performance. Negative pressure adsorption hot bending equipment exhibits a greater downward pulling force at the negative pressure adsorption holes, while the adsorption force is lower at other locations, causing uneven force during glass hot bending and resulting in abnormal curvature. Furthermore, the negative pressure adsorption holes are mostly located at the edges; the abnormal curvature of these parts of the glass prevents imaging, necessitating removal, which involves a large area and significant waste of glass raw materials.

[0004] Therefore, a hot bending forming device is needed that can apply uniform force to the glass during the hot bending process, causing it to bend downwards evenly, completely conform to the mold, and have a normal curvature, without affecting the imaging. Utility Model Content

[0005] In view of this, the present invention proposes a high-precision optical glass hot bending forming machine to solve the problems mentioned above.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A high-precision optical glass hot bending forming machine includes a housing, a guide tube, a roller, a forming mechanism, and a control unit. The guide tube penetrates the side plate of the housing and extends into the housing. The housing has an opening on one side. The roller is rotatably mounted on the guide tube via a bearing. A sealing cover is provided on the side of the roller located at the opening of the housing. Multiple guide wheel frames are provided inside the housing, and each guide wheel frame abuts against the outer circumferential surface of the roller. A driving mechanism is provided inside the housing, driving the roller to rotate via the outer ring of the bearing. A fixed cylinder is provided inside the roller, and the fixed cylinder is sleeved on the guide tube. Infrared sensors are evenly distributed around the outer side of the fixed cylinder along its axis. The heat pipe and multiple forming mechanisms are evenly distributed around the roller axis on the inner wall of the roller. Each forming mechanism includes a mold, a fixing block, an electric push rod, an L-shaped plate, a pressure rod, and a pad. The mold is located on the inner wall of the roller and has an arc-shaped surface on its top. The fixing blocks are located opposite each other on both sides of the mold and have a sliding groove on their tops. The bottom of the L-shaped plate is slidably located in the sliding groove. The electric push rod is located at the bottom of the sliding groove and its telescopic end is connected to the bottom surface of the L-shaped plate. Multiple pressure rods are located on the top and bottom surfaces of the L-shaped plate. The pad is located at the bottom of the pressure rod and above the arc-shaped surface. The control unit is located on the side of the housing and is electrically connected to the infrared heating pipe, the drive mechanism, and the electric push rod.

[0008] Preferably, the guide wheel frame includes a support rod, a shaft, a diagonal brace, a reinforcing plate, and a guide wheel. The support rods are disposed opposite each other on the inner wall of the box, the shaft is disposed between the two support rods, the diagonal brace is disposed opposite each other on both sides of the support rod, one end of which is connected to the box and the other end of which is connected to the side of the support rod, and the guide wheel is disposed opposite each other on the shaft, and the guide wheel abuts against the outer side of the roller.

[0009] Preferably, the drive mechanism includes a motor, a drive sprocket, a driven sprocket, and a chain. The motor is housed in a housing, and its output shaft drives the drive sprocket. The driven sprocket is fitted onto the outer ring of a bearing, and the drive sprocket and the driven sprocket are connected to each other by a chain.

[0010] Preferably, the drive mechanism further includes a support platform located at the bottom of the housing, and the motor located on the top surface of the support platform.

[0011] Preferably, the device also includes an air outlet pipe, with multiple air outlet pipes located on the side of the guide tube, and the end away from the guide tube passing through the fixed cylinder and communicating with the inner cavity of the roller.

[0012] Preferably, a cross is also included, which is disposed inside the fixed cylinder, with its four ends respectively connected to the inner wall of the fixed cylinder, and the air guide tube is fixedly connected to the side of the cross.

[0013] Preferably, the mold also includes an L-shaped limiting block, wherein the top of the mold has an arc-shaped portion, and the L-shaped limiting block is disposed at the four corners of the top of the arc-shaped portion.

[0014] Preferably, the fixing cylinder is provided with a heat insulation cover on the side of the box opening.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The forming mechanism is located on the inner wall of the roller. As the roller rotates, the centrifugal force generated is greater than the weight of the glass plate itself, reducing the influence of the glass plate's gravity. Furthermore, the centrifugal force is always perpendicular to the mold. As the temperature rises, the glass plate continuously softens. Under the action of centrifugal force, one side of the glass plate is evenly pressed against the curved surface at the top of the mold. When the infrared heating tube heats the inside of the roller to the predetermined temperature, after a preset time, the side of the glass plate is completely in contact with the curved surface of the mold. After heating stops, as the roller continues to rotate, the glass plate returns to room temperature. During this process, because the glass plate is always subjected to centrifugal force, it remains in contact with the curved surface of the mold, which can prevent the glass plate from warping due to cooling when the temperature drops, thereby further improving the consistency of the curvature of the glass plate and the curved surface at the top of the mold. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional structural diagram of a high-precision optical glass hot bending forming machine according to the present invention.

[0019] Figure 2 for Figure 1 Cross-sectional view at point AA;

[0020] Figure 3 for Figure 1 Cross-sectional view at point B in the middle;

[0021] Figure 4 This is a schematic diagram of the molding mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the guide wheel frame structure of this utility model;

[0023] Reference numerals: 1. Box body; 2. Conduit; 3. Air outlet pipe; 4. Roller; 5. Bearing; 6. Driven sprocket; 7. Driven sprocket; 8. Chain; 9. Motor; 10. Support platform; 11. Fixed cylinder; 12. Infrared heating tube; 13. Sealing cover; 14. Heat insulation cover; 15. Cross; 16. Mold; 17. Curved surface; 18. Glass plate; 19. Fixing block; 20. Slide groove; 21. Electric push rod; 22. L-shaped plate; 23. Pressure rod; 24. Pad plate; 25. L-shaped limit block; 26. Control unit; 27. Support rod; 28. Shaft; 29. ​​Guide wheel; 30. Diagonal brace; 31. Reinforcing plate. Detailed Implementation

[0024] To better understand the technical content of this utility model, a specific embodiment is provided below, and the utility model will be further described in conjunction with the accompanying drawings.

[0025] See Figures 1 to 5 This utility model provides a high-precision optical glass hot bending forming machine, including a housing 1, a guide tube 2, a roller 4, a forming mechanism, and a control unit 26. The guide tube 2 penetrates the side plate of the housing 1 and extends into the housing 1. The housing 1 has an opening on one side. The roller 4 is rotatably mounted on the guide tube 2 via a bearing 5. A sealing cover 13 is provided on the side of the roller 4 located at the opening of the housing 1. Multiple guide wheels 29 are provided inside the housing 1, and the guide wheels 29 abut against the outer circumferential surface of the roller 4. A driving mechanism is provided inside the housing 1, and the driving mechanism drives the outer ring of the bearing 5 to drive the roller 4 to rotate. A fixed cylinder 11 is provided inside the roller 4, and the fixed cylinder 11 is sleeved on the guide tube 2. Infrared heating tubes 12 are evenly distributed around the outer side of the fixed cylinder 11 along its axis. Multiple forming mechanisms are evenly distributed around the axis of the roller 4. The forming mechanism, arranged on the inner wall of the roller 4, includes a mold 16, a fixing block 19, an electric push rod 21, an L-shaped plate 22, a pressure rod 23, and a pad 24. The mold 16 is located on the inner wall of the roller 4 and has an arc-shaped surface 17 on its top. The fixing block 19 is located opposite to the mold 16 on both sides and has a sliding groove 20 on its top. The bottom of the L-shaped plate 22 is slidably located in the sliding groove 20. The electric push rod 21 is located at the bottom of the sliding groove 20 and its telescopic end is connected to the bottom surface of the L-shaped plate 22. Multiple pressure rods 23 are located on the top and bottom surfaces of the L-shaped plate 22. The pad 24 is located at the bottom of the pressure rods 23 and above the arc-shaped surface 17. The control unit 26 is located on the side of the housing 1 and is electrically connected to the infrared heating tube 12, the drive mechanism, and the electric push rod 21. The control unit 26 uses a microprocessor of model STM32-L0.

[0026] When the molding machine is working, the sealing cover 13 is first opened, and the drive mechanism is started through the control unit 26. The drive mechanism drives the roller 4 to rotate, so that the mold 16 is at the lowest point in the vertical direction. Then, the electric push rod 21 is started through the control unit 26. The extension end of the electric push rod 21 extends and drives the L-shaped plate 22 to rise. The rise of the L-shaped plate 22 drives the pressure rod 23 and the pad 24 to rise and leave the top surface of the mold 16. Then, the glass plate 18 is installed on the top of the arc surface 17. Then, the electric push rod 21 is restarted. The extension end of the electric push rod 21 shortens and drives the L-shaped plate 22 to fall. The fall of the L-shaped plate 22 drives the pressure rod 23 and the pad 24 to fall. The bottom surface of the pad 24 abuts against and presses the top surface of the glass plate 18, fixing the glass plate 18 to the top of the arc surface 17. The drive mechanism is activated sequentially to rotate roller 4. The rotation of roller 4 rotates the forming mechanism to its lowest position. Following this operation, all glass plates 18 are installed and fixed onto the arc-shaped surface 17 at the top of mold 16. The sealing cover 13 is closed. Then, the drive mechanism is activated, driving roller 4 to rotate. Simultaneously, the infrared heating tube 12 is activated, heating the glass plates 18. The glass plates 18 rotate together with the forming mechanism and roller 4, experiencing centrifugal force. When the forming mechanism is at its highest point, the centrifugal force is greater than the weight of the glass plates 18 themselves, reducing the influence of gravity on the glass plates 18. Furthermore, the centrifugal force is always perpendicular to mold 16. As the temperature rises, the glass... As the glass plate 18 softens, under the action of centrifugal force, one side of the glass plate 18 is evenly pressed against the arc-shaped surface 17 at the top of the mold 16. When the infrared heating tube 12 heats the inside of the roller 4 to a predetermined temperature, after a preset time, the side of the glass plate 18 is completely in contact with the arc-shaped surface 17 of the mold 16. Then the infrared heating tube 12 is turned off, and heating stops. As the roller 4 continues to rotate, the glass plate 18 returns to room temperature. During this process, because the glass plate 18 is always subjected to centrifugal force, it remains in contact with the arc-shaped surface 17, which can prevent the glass plate 18 from cooling and warping when the temperature drops, thereby further improving the consistency of the curvature of the glass plate 18 and the arc-shaped surface 17 at the top of the mold 16.

[0027] Preferably, the guide wheel 29 frame includes a support rod 27, a shaft 28, a diagonal brace 30, a reinforcing plate 31, and a guide wheel 29. The support rod 27 is disposed opposite to the inner wall of the housing 1, the shaft 28 is disposed between the two support rods 27, the diagonal brace 30 is disposed opposite to both sides of the support rod 27, one end of which is connected to the housing 1, and the other end is connected to the side of the support rod 27. The guide wheel 29 is disposed opposite to the shaft 28, and the guide wheel 29 abuts against the outer side of the roller 4.

[0028] The guide wheel 29 frame adopts a double guide wheel 29 design. Multiple guide wheels 29 frames form a spatial constraint, allowing the roller 4 to rotate around its axis. The diagonal brace 30 and the support rod 27 form a triangular mechanical structure, which improves the overall strength of the guide wheel 29 frame and prevents the support rod 27 from bending and failing at the root when the roller 4 rotates at high speed, thereby improving the reliability of the molding machine.

[0029] Preferably, the drive mechanism includes a motor 9, a drive sprocket 7, a driven sprocket 6, and a chain 8. The motor 9 is located inside the housing 1, and its output shaft drives the drive sprocket 7. The driven sprocket 6 is sleeved on the outer ring of the bearing 5. The drive sprocket 7 and the driven sprocket 6 are connected to each other through the chain 8. The motor 9 is a servo motor 9, which can control the rotation speed and angle.

[0030] When the molding machine is working, the drive mechanism drives the roller 4 to rotate. The motor 9 is started by the control unit 26. The rotation of the motor 9 drives the drive sprocket 7 to rotate. The rotation of the drive sprocket 7 drives the driven sprocket 6 to rotate through the chain 8. The rotation of the driven sprocket 6 drives the outer ring of the bearing 5 to rotate, thereby driving the roller 4 to rotate.

[0031] Preferably, the drive mechanism further includes a support platform 10, which is located at the bottom of the housing 1, and the motor 9 is located on the top surface of the support platform 10.

[0032] The support platform 10 is used to support the motor 9 and is the basic load-bearing component of the drive mechanism. Its bottom is bolted or welded to the inner wall of the housing 1. The top surface of the support platform 10 is a horizontal plane. The motor 9 is horizontally installed on the top surface of the support platform 10. The output shaft direction of the motor 9 is consistent with the opening direction of the housing 1. The height of the support platform 10 can be adjusted according to the specifications of the motor 9 to ensure the stability of the chain drive.

[0033] Preferably, it also includes an air outlet pipe 3, and a plurality of the air outlet pipes 3 are provided on the side of the guide tube 2, with the end away from the guide tube 2 passing through the fixed cylinder 11 and communicating with the inner cavity of the roller 4.

[0034] The side of the conduit 2 away from the housing 1 is connected to a nitrogen source. When the molding machine is working, nitrogen is introduced into the conduit 2 from the nitrogen source. The nitrogen enters the fixed cylinder 11 and the inner cavity of the roller 4 through the outlet pipe 3. Nitrogen is a chemically stable gas that can isolate oxygen in the air, thereby preventing oxidation of metal parts during the continuous heating process inside the roller 4, thus reducing the service life of the overall molding machine. At the same time, nitrogen also has a cooling function. After the heating stage is completed, nitrogen is continuously replenished and the sealing cover 13 is opened to discharge the nitrogen, which accelerates the cooling time of the glass plate 18 and improves the molding efficiency.

[0035] Preferably, a cross 15 is also included, which is disposed inside the fixed cylinder 11, with its four ends respectively connected to the inner wall of the fixed cylinder 11, and the air guide tube is fixedly connected to the side of the cross 15.

[0036] The cross 15 is used to support and reinforce the connection between the fixed cylinder 11 and the conduit 2. As a supporting skeleton inside the fixed cylinder 11, the cross 15 can improve the deformation resistance of the fixed cylinder 11 and prevent the fixed cylinder 11 from deforming at high temperatures, thereby affecting the normal operation of the infrared heating tube 12.

[0037] Preferably, the mold 16 also includes an L-shaped limiting block 25, with an arc-shaped portion at the top and the L-shaped limiting block 25 positioned at the four corners of the top of the arc-shaped portion.

[0038] L-shaped limiting blocks 25 are positioned at the four corners of the top of the arc-shaped part to limit the position of the glass plate 18 during the forming process. When the roller 4 rotates at high speed, as the temperature rises, the glass plate 18 softens and adheres to the curved surface of the mold 16, while the sides extend outwards. The L-shaped limiting blocks 25 and the mold 16 limit the glass plate 18 in a specific position, which helps to reduce the forming error of the glass plate 18.

[0039] Preferably, the fixing cylinder 11 is provided with a heat insulation cover 14 on the side of the opening of the box body 1.

[0040] The heat insulation cover 14 is used to seal the fixing cylinder 11, insulate the wires and other components inside the fixing cylinder 11 from heat, and prevent the effects of high temperature, thus playing a protective role. When maintenance is required inside the fixing cylinder 11, the heat insulation cover 14 can be easily opened.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-precision optical glass heat-bending forming machine, characterized by, The system includes a housing, a conduit, a roller, a forming mechanism, and a control unit. The conduit penetrates the side panel of the housing and extends into the housing. One side of the housing is open. The roller is rotatably mounted on the conduit via a bearing. A sealing cover is provided on the side of the roller located at the housing opening. Multiple guide wheel frames are installed inside the housing, each abutting against the outer circumference of the roller. A drive mechanism is installed inside the housing, driving the roller to rotate via the outer ring of the bearing. A fixed cylinder is installed inside the roller, sleeved on the conduit. Infrared heating tubes are evenly distributed around the outer side of the fixed cylinder along its axis. Multiple forming mechanisms... The forming mechanism is evenly distributed around the axis of the roller on the inner wall of the roller. The forming mechanism includes a mold, a fixing block, an electric push rod, an L-shaped plate, a pressure rod, and a pad. The mold is located on the inner wall of the roller and has an arc-shaped surface on its top. The fixing block is located opposite to the two sides of the mold and has a sliding groove on its top. The bottom of the L-shaped plate is slidably located in the sliding groove. The electric push rod is located at the bottom of the sliding groove and its telescopic end is connected to the bottom surface of the L-shaped plate. Multiple pressure rods are located on the top and bottom surfaces of the L-shaped plate. The pad is located at the bottom of the pressure rod and above the arc-shaped surface. The control unit is located on the side of the housing and is electrically connected to the infrared heating tube, the drive mechanism, and the electric push rod.

2. The high-precision optical glass thermal bending forming machine according to claim 1, characterized in that, The guide wheel frame includes a support rod, a shaft, a diagonal brace, a reinforcing plate, and a guide wheel. The support rods are positioned opposite each other on the inner wall of the box. The shaft is positioned between the two support rods. The diagonal brace is positioned opposite each other on both sides of the support rod, with one end connected to the box and the other end connected to the side of the support rod. The guide wheel is positioned opposite each other on the shaft and abuts against the outer side of the roller.

3. The high-precision optical glass thermal forming machine according to claim 1, characterized in that, The drive mechanism includes a motor, a drive sprocket, a driven sprocket, and a chain. The motor is located inside the housing and its output shaft drives the drive sprocket. The driven sprocket is sleeved on the outer ring of the bearing. The drive sprocket and the driven sprocket are connected to each other by a chain.

4. The high-precision optical glass thermal forming machine according to claim 3, characterized in that, The drive mechanism also includes a support platform, which is located at the bottom of the housing, and the motor is located on the top surface of the support platform.

5. The high-precision optical glass thermal forming machine according to claim 1, wherein It also includes an air outlet pipe, with multiple air outlet pipes located on the side of the guide tube, the end of which passes through the fixed cylinder and communicates with the inner cavity of the roller.

6. The high-precision optical glass thermal forming machine according to claim 1, wherein It also includes a cross, which is located inside a fixed cylinder, with its four ends connected to the inner wall of the fixed cylinder, and the conduit is fixedly connected to the side of the cross.

7. The high-precision optical glass thermal forming machine according to claim 1, wherein It also includes L-shaped limiting blocks, and the top of the mold is provided with an arc-shaped part, with the L-shaped limiting blocks positioned at the four corners of the top of the arc-shaped part.

8. The high-precision optical glass thermal forming machine according to claim 1, wherein The fixed cylinder is equipped with a heat-insulating cover on the side of the box opening.

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