Multi-field heat source controllable gradient hot bending and online integrated detection device and forming method

Abstract

The invention provides a multi-field heat source controllable gradient hot bending and online integrated detection device and a forming method. The multi-field heat source controllable gradient hot bending and online integrated detection device comprises a workbench, a mold, a rotating module, a first heating module, a second heating module, a third heating module, a control module and a shell. The mold is arranged above the workbench, the glass component is arranged on the mold, and the rotating module drives the mold to rotate; the first heating modules are arranged on the two sides of the mold and are used for integrally heating the mold and the glass component; the second heating module is arranged on the workbench and is positioned above the mold; the third heating module is arranged in the mold and is used for adjusting the local temperature of the glass component heated by the second heating module and locally preserving heat; multi-field heat source heating is adopted, directional heating can be conducted, and high-precision heating can be achieved; on-line temperature sensing is carried out through the built-in temperature sensor, and then the third heating module is controlled by the control module to locally heat an area with non-uniform temperature, so that the heating non-uniformity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass hot bending processing, and in particular to a multi-field heat source controllable gradient hot bending and online integrated detection device and a forming method. Background Art

[0002] Portable electronic products such as smart watches, smart phones and smart tablets have become necessities in the fast-paced information society. With the continuous development of science and technology, flexible displays have become a hot spot in the field of these electronic products. Flexible displays not only have the advantages of being thin and light and portable, but also have the potential to be foldable and bendable, which makes them have broad application prospects in electronic products such as mobile phones, tablets, and laptops. With the development of flexible displays, products with diversified designs from typical flat panels to partially curved panels (such as U-shaped, C-shaped, and S-shaped) based on the geometric characteristics of the display are gaining more and more attention. These products can not only meet the convenience requirements of users, but also highlight the design features of the products.

[0003] Flexible displays require transparent covers to protect their internal display components. Plastic covers were first commercialized because of their unbreakable and plastic properties, but they are easily scratched, fade over time, and have poor light transmittance. Therefore, glass is now commonly used to replace plastic materials because glass has excellent photochemical stability, optical gaps, excellent surface resistance to mechanical indentation, and especially smoother touch operation. However, due to the high brittleness and hardness of glass at room temperature, it is difficult to deform accurately to fully fit the curved panel, so a high-temperature molding method above the softening point of glass is required to manufacture the curved cover.

[0004] For example, the invention patent with announcement number CN107162393A discloses an energy-saving hot bending machine, including: a feeding structure, a heating structure, a cooling mechanism, a finished product area and a support frame, wherein the feeding structure, the heating structure, the cooling mechanism and the finished product area are arranged on the support frame, the outlet of the feeding structure is connected with the inlet of the heating structure, the outlet of the heating structure is connected with the inlet of the cooling mechanism, and the outlet of the cooling mechanism is connected with the finished product area.

[0005] For example, the invention patent with the announcement number CN111792822A discloses a hot bending machine, which includes a frame, a molding furnace, a hot bending structure and a driving mechanism. The molding furnace is installed on the frame, and the hot bending structure is arranged in the molding furnace. The hot bending structure includes a punch and a flexible part configured in a tensioned state, the punch has a molding arc surface, and the driving mechanism is used to drive at least one of the flexible part and the punch to move relative to the other, so that the flexible part and the punch can squeeze the glass, thereby being able to bend the glass to fit on the molding arc surface, and the inside of the punch has a cavity.

[0006] For example, the invention patent with announcement number CN118954917A discloses a forming method for a single-cavity 3D glass heat bending machine, in which the 3D heat bending concave-convex mold is placed in the single-cavity heat bending machine, and the glass is placed in the concave mold to heat it up, and the temperature is set to 800°C. The concave mold is heated to soften the glass, and the convex mold is slowly lowered to close the mold, and the equipment begins to cool down. When the mold is completely closed, the temperature of the concave mold is reduced to 600°C. Through temperature regulation, the glass will not have poor surface molding concave-convex and pitting caused by high temperature. At the same time, the mold and glass are heated up through the high temperature setting in the early stage. When the mold is completely closed, the temperature is just reduced to the set molding temperature, so that the mold heating cycle is shortened.

[0007] Judging from the existing patents, most traditional hot bending technologies require molds for pressure forming, and the heat source is relatively single, which is not convenient for precise control of partitions and gradients. However, with the changes in market demand, the shapes of curved glass are becoming more and more complex, such as U-shaped, C-shaped and S-shaped, which are difficult to achieve using traditional upper molds / lower molds (convex molds / concave molds). Therefore, the existing glass hot bending machines have a single heat source, resulting in uneven heating of the product, and are subject to the spatial topology of the mold, resulting in low finished product yield and long production cycle. Summary of the invention

[0008] The main purpose of the present invention is to overcome the above shortcomings and deficiencies of the prior art and to provide a multi-field heat source controllable gradient hot bending and online integrated detection device and forming method.

[0009] A multi-field heat source controllable gradient hot bending and online integrated detection device is used for hot bending of glass components, comprising: a workbench, a mold, a rotating module, a first heating module, a second heating module, a third heating module, a control module and a shell, wherein the mold, the rotating module, the first heating module and the third heating module are located in the shell, and the control module is connected to the first heating module, the second heating module and the third heating module; the mold is installed above the workbench, the glass component is arranged on the mold, and the rotating module drives the mold to rotate; the first heating module is installed on both sides of the mold and heats the mold and the glass component as a whole; the second heating module is installed on the workbench and located above the mold, and while heating the glass component, the second heating module can also detect the bending degree of the glass component and transmit the data to the control module; the third heating module is installed inside the mold, and adjusts and partially insulates the local temperature of the glass component after being heated by the second heating module.

[0010] The present invention adopts multiple heat sources to heat glass components and molds, and can heat the required areas in a directionally manner; the laser emitted by the second heating module can heat the glass components to achieve hot bending, and the second heating module can also detect the degree of hot bending of the glass components while heating. The control module detects the distance between the bending surface of the glass component and the second heating module through laser, and realizes the detection of the degree of fit between the glass component and the mold after hot bending. The second heating module can realize heating, hot bending and online integrated detection; online temperature sensing is performed through the temperature sensor built into the mold, and then the control module controls the third heating module to perform local heating on the area with uneven temperature, thereby improving heating unevenness and improving the yield of finished products.

[0011] In one embodiment, the mold is provided with a plurality of air holes.

[0012] In one embodiment, the second heating module is a laser heating module, and the control module controls the second heating module to move relative to the mold.

[0013] In one embodiment, the first heating module is an infrared heating module.

[0014] In one embodiment, the third heating module is an electric heating module, which includes an electric heating rod and a temperature sensor array. The electric heating rod and the temperature sensor array are connected to the control module. The electric heating rod performs local heating and local insulation on the mold under the control of the control module according to data from the temperature sensor array.

[0015] In one embodiment, the control module includes a high-pressure nitrogen module, and the high-pressure nitrogen module injects nitrogen into the housing.

[0016] In one embodiment, the rotating module includes a base plate, a left bracket, a right bracket, a left rotating shaft, a right rotating shaft, a gear mechanism, a rotating motor, a support member and a displacement member; the left rotating shaft is mounted on the left bracket, the right rotating shaft is mounted on the right bracket, the support member, the left bracket and the right bracket are sequentially mounted on the base plate, the rotating motor is mounted on the support member, the mold is mounted between the left rotating shaft and the right rotating shaft, the gear mechanism is mounted between the rotating motor and the left rotating shaft, the rotating motor drives the gear mechanism to rotate, and then drives the left rotating shaft to rotate so that the mold rotates; the displacement member is mounted on the workbench and connected to the bottom of the base plate, and the displacement member drives the base plate to move linearly.

[0017] A multi-field heat source controllable gradient hot bending and online integrated detection forming method comprises the following steps:

[0018] Step 1, preheating loading, setting a first target temperature of the inner chamber of the shell, preheating the glass component through the first heating module, after reaching the first target temperature, installing the glass component on the mold and judging its flatness and alignment position, the pores on the mold generate negative pressure to adsorb the glass component to the outer surface of the mold, wherein the first target temperature is not less than 230°C;

[0019] Step 2, hot bending, further heating the mold and the glass component through the first heating module, and when the second target temperature is reached, the glass component is locally and rapidly heated through the second heating module; the control module synchronously controls the movement of the second heating module and the rotation of the mold to achieve multi-field hot bending of the glass component, wherein the second target temperature is not less than 400°C;

[0020] Step 3, detection, the laser emitted by the second heating module can detect the bending degree of the glass component, and then the control module detects the degree of fit between the glass component and the mold after hot bending through the second heating module. When there is a certain gap between the glass component and the mold after hot bending, the control module controls to increase the temperature of the second heating module, and at the same time, the control module controls the third heating module to heat up the hot bending area until the degree of fit between the glass component and the mold after hot bending meets the requirements;

[0021] Step 4: Insulate and cool, reset the mold, and locally insulate the hot-bending area of ​​the glass component through the third heating module; after the insulation is completed, turn off the third heating module, and then inject a temperature-controlled airflow into the glass component through the control module to cool the glass component and the mold; turn off the negative pressure of the mold's pores and take out the hot-bent glass component.

[0022] In one of the embodiments, in step 3, when the glass component is hot-bent and the degree of fit with the mold meets the requirements, the internal temperature of the mold is measured by a temperature sensor array, and the internal temperature of the mold is maintained at a first target temperature. The mold is then rotated by an angle, and the next area is hot-bent by a second heating module and a third heating module. When the glass component is formed, the second heating module is turned off.

[0023] In one embodiment, in step 3, during the hot bending of the glass component under the action of the second heating module and the third heating module, the gas injection module applies a temperature-controlled airflow to the glass component to accelerate the downward bending of the glass component.

[0024] The present invention has the following beneficial effects:

[0025] 1. Use infrared, laser, and electric heating multi-field heat sources to heat glass components and molds, which can heat the required areas in a directionally manner and achieve high-precision heating; through the temperature sensor built into the mold to control the molding, electric heating can also be used to locally heat the temperature-uneven areas, improve heating unevenness, and improve the yield of finished products;

[0026] 2. Through the laser heating and online temperature sensing of the second heating module, the second heating module can realize heating and online integrated detection, and can also detect the curvature of its thermal bending in real time. If it is found that the degree of fit between the glass component and the mold does not meet the requirements, the molding process parameters are appropriately adjusted to improve the molding quality and realize online perception and control of the thermal bending quality;

[0027] 3. Through the heating strategy of multiple heat sources and the optimization of heating methods, not only the heating time can be reduced, but also the unit energy consumption of hot bending can be reduced, thereby improving the competitiveness of manufacturing enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a multi-field heat source controllable gradient hot bending and online integrated detection device of the present invention;

[0029] Figure 2 It is a partial structural schematic diagram of the multi-field heat source controllable gradient hot bending and online integrated detection device of the present invention;

[0030] Figure 3 It is a partial structural schematic diagram of the multi-field heat source controllable gradient hot bending and online integrated detection device of the present invention;

[0031] Figure 4 It is a partial structural schematic diagram of the multi-field heat source controllable gradient hot bending and online integrated detection device of the present invention;

[0032] Figure 5 It is a schematic diagram of the electric control module of the multi-field heat source controllable gradient hot bending and online integrated detection device of the present invention;

[0033] Figure 6 It is a schematic diagram of an auxiliary module of the multi-field heat source controllable gradient hot bending and online integrated detection device of the present invention;

[0034] Figure 7 It is a schematic diagram of the process of the multi-field heat source controllable gradient hot bending and online integrated detection forming method of the present invention;

[0035] Figure 8a It is a schematic diagram of a first embodiment of a multi-field heat source controllable gradient hot bending and online integrated detection forming method of the present invention;

[0036] Figure 8bIt is a schematic diagram of a second embodiment of the multi-field heat source controllable gradient hot bending and online integrated detection forming method of the present invention;

[0037] Figure 8c It is a schematic diagram of a third embodiment of the multi-field heat source controllable gradient hot bending and online integrated detection forming method of the present invention;

[0038] Figure 9a It is a schematic diagram of the first gap of the multi-field heat source controllable gradient hot bending and online integrated detection forming method of the present invention;

[0039] Figure 9b It is a schematic diagram of the second gap of the multi-field heat source controllable gradient hot bending and online integrated detection forming method of the present invention;

[0040] Fig.9c A schematic diagram of a third gap of the multi-field heat source controllable gradient hot bending and online integrated detection forming method of the present invention;

[0041] Fig.10 This is a training model diagram of the product defect forming method based on infrared thermal imaging of the present invention. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] The present invention provides a multi-field heat source controllable gradient hot bending and online integrated detection device, which is used for hot bending of glass components, and comprises a workbench, a mold, a rotating module, a first heating module, a second heating module, a third heating module, a control module and a shell, wherein the mold, the rotating module, the first heating module and the third heating module are located in the shell, and the control module is connected to the first heating module, the second heating module and the third heating module; the mold is installed above the workbench, the glass component is arranged on the mold, and the rotating module drives the mold to rotate; the first heating module is installed on both sides of the mold and heats the mold and the glass component as a whole; the second heating module is installed on the workbench and is located above the mold; the third heating module is installed inside the mold, and adjusts and locally keeps the local temperature of the glass component heated by the second heating module.

[0048] The present invention adopts multiple heat sources to heat glass components and molds, can heat the required areas in a direction, and can achieve high-precision heating; online temperature sensing is performed through a temperature sensor built into the mold, and then the third heating module is controlled by the control module to perform local heating on the area with uneven temperature, thereby improving heating unevenness and improving the yield of finished products.

[0049] Embodiment 1

[0050] See also Figures 1 to 4The present invention provides a multi-field heat source controllable gradient hot bending and online integrated detection device 100, which is used for hot bending of glass components, and includes a workbench 1, a mold 2, a rotating module 3, a first heating module 4, a second heating module 5, a third heating module 6, a control module and a shell 7, wherein the mold 2, the rotating module 3, the first heating module 4, and the third heating module 6 are located in the shell 7, and the control module is connected with the first heating module 4, the second heating module 5, and the third heating module 6; the mold 2 is installed above the workbench 1, the glass component 200 is arranged on the mold 2, and the rotating module 3 drives the mold 2 to rotate; the first heating module 4 is installed on both sides of the mold 2 and heats the mold 2 and the glass component 200 as a whole; the second heating module 5 is installed on the workbench 1 and located above the mold 2, and while heating the glass component, the second heating module 4 can also detect the bending degree of the glass component 200 and transmit the data to the control module; the third heating module 6 is installed inside the mold 2, and adjusts and partially keeps warm the local temperature of the glass component 200 after being heated by the second heating module 5. Preferably, the mold 2 is provided with a plurality of air holes. After the mold 2 is connected to the control module, the air holes are used to generate negative pressure to assist the adsorption of the glass component 200.

[0051] Among them, the shell 7 is made of ordinary steel plate or high temperature resistant plastic, which is used to protect the device in the shell 7 and reduce the consumption of nitrogen protective gas. Preferably, the first heating module 4, the mold 2 and the rotating module 3 are arranged in the shell 7, and the second heating module 5 is arranged outside the shell 7 and located above the shell 7. In order to ensure the scanning heating of the second heating module 5, a long strip opening 71 is opened above the shell 7 corresponding to the position of the second heating module 5. The size of the opening 71 is only limited by the scanning heating of the second heating module 5, which can minimize the consumption of protective gas. Preferably, in order to ensure the movement of the second heating module 5, a bracket is installed on the workbench 1 and a linear displacement screw 51 is set on the bracket. The second heating module 5 is installed on the linear displacement screw 51 and can move linearly.

[0052] Preferably, the first heating module 4 is an infrared heating module, the second heating module 5 is a laser heating module, and the third heating module 6 is an electric heating module, wherein the second heating module 5 is a CO 2 Laser, preferably CO 2 The laser spot diameter is 5 to 12 mm, the pulse duty cycle is 25 to 45%, the pulse repetition frequency is 60 to 150 kHz, and the scanning speed is 0.1 to 1.5 m / s. More preferably, the control module controls the second heating module 5 to move relative to the mold 2. More preferably, the second heating module 5 quickly heats the hot bending area of ​​the glass component 200 by scanning. The following example illustrates that for a glass component with a thickness greater than 5 mm, CO 2The process parameters of the laser are adjusted to the high power range, that is, the spot diameter is selected to be less than 8mm, the pulse duty cycle is more than 30%, the pulse repetition frequency is less than 80kHz, and the scanning speed is less than 0.6m / s; for glass components with a thickness of less than 1mm, CO 2 The process parameters of the laser are adjusted to a low power range, that is, the spot diameter is selected to be greater than 10 mm, the pulse duty cycle is greater than 30%, the pulse repetition frequency is greater than 100 kHz, and the scanning speed is greater than 1.2 m / s.

[0053] Among them, the laser emitted by the second heating module 5 can heat the glass component 200 to achieve hot bending, and the second heating module 5 can also detect the degree of hot bending of the glass component 200 while heating. The control module detects the distance between the bending surface of the glass component and the second heating module 5 through laser, and realizes the detection of the degree of fit between the glass component and the mold 2 after hot bending. The second heating module 5 can realize heating and online integrated detection.

[0054] More specifically, see Figure 3 The rotating module 3 includes a base plate 31, a left bracket 32, a right bracket 33, a left rotating shaft 34, a right rotating shaft 35, a gear mechanism 36, a rotating motor 37, a support member 38 and a displacement member 39; the left rotating shaft 34 is mounted on the left bracket 32, the right rotating shaft 35 is mounted on the right bracket 33, the support member 38, the left bracket 32 ​​and the right bracket 33 are sequentially mounted on the base plate 31, the rotating motor 37 is mounted on the support member 38, the mold 2 is mounted between the left rotating shaft 34 and the right rotating shaft 35, the gear mechanism 36 is mounted between the rotating motor 37 and the left rotating shaft 34, the rotating motor 37 drives the gear mechanism 36 to rotate, and then drives the left rotating shaft 34 to rotate so that the mold 2 rotates; the displacement member 39 is mounted on the workbench 1 and connected to the bottom of the base plate 31, and the displacement member 39 drives the base plate 31 to move linearly. Preferably, for glass components to be hot-bent with obvious differences in specifications, the rotating mechanism 3 needs to be readjusted; the rotating mechanism 3 adjusts the distance between the left bracket 32 ​​and the right bracket 33 to adapt to molds of different specifications and sizes within a certain range, wherein the distance between the left bracket 32 ​​and the right bracket 33 fluctuates within 30%.

[0055] More specifically, see Figure 4 The third heating module 6 includes an electric heating rod 61 and a temperature sensor array 62. The electric heating rod 61 and the temperature sensor array 62 are connected to the control module. The electric heating rod 61 performs local heating and local heat preservation on the mold 2 under the control of the control module according to the data of the temperature sensor array 62. It can be understood that the temperature sensor array 62 is arranged at the corresponding part of the mold 2 where the glass component 200 needs to be bent, so as to facilitate timely detection of the bending of the glass component 200.

[0056] More specifically, see Figure 5 and Figure 6 The control module includes an electric control module 8 and an auxiliary module 9. The electric control module 8 includes an embedded ARM single-chip microcomputer 81, an input / output submodule 82, an industrial Ethernet communication submodule 83, and a display submodule 84. The embedded ARM single-chip microcomputer 81 is connected to the input / output submodule 82 through an on-chip bus. The auxiliary module 9 includes an industrial Ethernet 91, a ring LED light 92, an alarm 93, a power module 94, and a high-pressure nitrogen module 95. The industrial Ethernet 91, the ring LED light 92, and the alarm 93 respectively realize communication, information display, and alarm. Among them, the embedded ARM single-chip microcomputer 81 is connected to the second heating module 5 and the first heating module 4 through the industrial Ethernet 91 of the auxiliary module 9; the input / output submodule 82 is respectively connected to the control signal of the linear displacement screw 51 and the electric heating rod 61, and controls the corresponding stepping motor and solenoid valve according to the control process. The input / output submodule 82 is also connected to and controls the opening and closing of the ring LED light 92 and its brightness; the input / output submodule 82 is also connected to the alarm 93. The power module 94 provides power to the electric heating rod 61, and the power module 94 is electrically connected to the electric control module 8 via the industrial Ethernet 91. The auxiliary module 9 is a common device, which is installed under the workbench 1.

[0057] Among them, the high-pressure nitrogen module 95 provides temperature / pressure controllable nitrogen for the mold 2 in working state, and the high-pressure nitrogen module 95 is electrically connected to the electronic control module 8 through the industrial Ethernet 91; the electronic control module 8 controls the temperature, injection angle and pressure of the nitrogen injected into the shell 7 by the high-pressure nitrogen module 95, wherein the temperature of the injected nitrogen needs to be set according to the role it plays.

[0058] The present invention uses multiple heat sources to heat the glass component 200 and the mold 2, and can heat the required area in a direction, thereby achieving high-precision heating. On the one hand, it can effectively improve the heating efficiency and reduce the assembly line cycle time. On the other hand, through a single rotating mold 2, complex C-shaped or S-shaped hot bending forming can be achieved.

[0059] Embodiment 2

[0060] See also Figure 7 The present invention provides a multi-field heat source controllable gradient hot bending and online integrated detection forming method, comprising the following steps:

[0061] Step 1, preheating loading, setting the first target temperature of the inner chamber of the housing 7, preheating the glass component 200 through the first heating module 4, and after reaching the first target temperature, installing the glass component 200 on the mold 2 and judging its flatness and alignment position, and the pores on the mold 2 generate negative pressure to adsorb the glass component 200 to the outer surface of the mold 2, wherein the first target temperature is not less than 230°C, preferably, the first target temperature range is 230°C to 310°C;

[0062] Step 2, hot bending, further heating the mold 2 and the glass component 200 through the first heating module 4, and when the second target temperature is reached, the glass component 200 is locally and rapidly heated through the second heating module 5; the control module synchronously controls the movement of the second heating module 5 and the rotation of the mold 2 to achieve multi-field hot bending of the glass component 200, wherein the second target temperature is not less than 400° C., preferably, the second target temperature is not less than 420° C.;

[0063] Step 3, detection. The laser emitted by the second heating module 5 can detect the bending degree of the glass component 200, and then the control module detects the degree of fit between the glass component 200 and the mold 2 after thermal bending through the second heating module. When there is a certain gap between the glass component 200 and the mold 2 after thermal bending, the control module controls to increase the temperature of the second heating module 5, and at the same time, the control module controls the third heating module 6 to heat the thermal bending area until the degree of fit between the glass component 200 and the mold 2 after thermal bending meets the requirements;

[0064] Step 4, insulation cooling, reset the mold 2, and locally insulate the hot-bending area of ​​the glass component 200 through the third heating module 6; after the insulation is completed, turn off the third heating module 6, and then inject a temperature-controlled airflow into the glass component 200 through the control module to cool the glass component 200 and the mold 2; turn off the negative pressure of the air pores of the mold 2, and take out the hot-bent glass component 200.

[0065] The laser emitted by the second heating module 5 of the present invention can heat the glass component 200 to achieve thermal bending, and the second heating module 5 can also detect the degree of thermal bending of the glass component 200 while heating. The control module detects the distance between the bending surface of the glass component 200 and the second heating module 5 through laser to detect the degree of fit between the glass component 200 and the mold 2 after thermal bending. The present invention can achieve heating and online integrated detection through the second heating module 5, reduce the setting of the detection module, simplify the equipment, and reduce the cost.

[0066] Preferably, in step 3, when the degree of fit between the glass component 200 and the mold 2 after heat bending meets the requirements, the internal temperature of the mold 2 is measured by the temperature sensor array 62, and the internal temperature of the mold 2 is maintained at the first target temperature. The mold 2 is then rotated by an angle, and the next area is heat-bent and formed by the second heating module 5 and the third heating module 6. When the glass component 200 is formed, the second heating module 5 is turned off.

[0067] Preferably, in step 3, during the hot bending of the glass component 200 under the action of the second heating module 5 and the third heating module 6, the gas injection module applies a temperature-controllable airflow to the glass component 200 to accelerate the downward bending of the glass component 200.

[0068] See also Figure 8a , the first implementation method is to bend a U-shaped glass component, place the flat glass flat on a rotatable mold 2, and correct the initial position of the mold 2. During processing, the starting point of the bend is locally heated by a laser, and a controllable airflow is applied to accelerate the downward bending of the glass component 200. The mold 2 rotates at a set speed to guide the glass component 200 to form the first curvature. After the first bend is formed, the laser heating area moves to the midpoint of the bend, and local heating continues. The other end of the glass component 200 is bent upward by the airflow and the rotation of the mold 2 to complete the second curvature. By precisely controlling the heating and rotation speed of each step, the transition between the two bends is ensured to be smooth and the curvature is symmetrical. After cooling, the finished U-shaped glass component 200 presents a smooth surface and high design accuracy.

[0069] See also Figure 8b , the second implementation method is to bend a C-shaped glass component. First, place the flat glass on the rotatable mold 2 and correct the initial position of the mold 2. During processing, the starting point of the first bend is locally heated by a laser, and a controllable airflow is applied to accelerate the downward bending of the glass component 200. The mold 2 rotates at a set speed to guide the glass to form the first arc. After the first bend is formed, the laser heating area moves to the starting point of the second bend, continues to be locally heated, and the other end of the glass is bent upward by airflow and mold rotation to complete the second arc. By precisely controlling the heating and rotation speed of each step, the transition between the two bends is smooth and the arc is symmetrical. Finally, as the mold completes a full circle of rotation, the glass fits the mold completely to form a C-shaped structure, while ensuring processing accuracy and surface finish.

[0070] See also Figure 8c, the third implementation method is to bend the glass component into an S-shaped shape. It is necessary to place the flat glass on a rotatable mold 2, locally heat the starting point of the first bending area with a laser, and accelerate the bending process with a controllable airflow. The mold 2 begins to rotate, guiding the glass component 200 to gradually form the first arc to one side. The bending angle and radius are achieved through precise heating time and control of the mold 2. When the first section of the bend is completed, the heating area moves to the other end, and the second bending area is laser heated. At the same time, the mold 2 continues to rotate, and the glass is assisted by the airflow to form a reverse arc, and the second section of the bend is gradually completed. During the entire processing process, the synergistic effect of the mold 2 and the airflow ensures that the transition between the two sections of the bend is smooth, and the S-shaped structure is symmetrical and smooth. After cooling, the finished glass product is shaped, showing a high-precision S-shaped curve.

[0071] The present invention can realize not only U-shaped hot bending molding but also complex C-shaped or S-shaped hot bending molding through a single rotating mold 2, which is of great significance for improving the development of precision manufacturing technology of my country's 3C products and has good market application prospects.

[0072] Embodiment 3

[0073] The present invention provides a multi-field heat source controllable gradient hot bending and online integrated detection forming method, the steps are similar to those of the second embodiment, the difference is that step 3 also includes integrated curvature detection of hot bending and online temperature sensing, including the following steps:

[0074] Through the control of the electronic control module 8, CO 2 The optical path of the laser is aligned with the hot bending area of ​​the glass component 200, and a temperature sensor array 62 needs to be placed inside the mold 2 corresponding to the area;

[0075] CO 2 The laser selects appropriate process parameters. Preferably, the detection power density is 1 / 5 to 1 / 20 of the thermal bending power density, and the scanning distance is not greater than 3 mm, so that the temperature of the glass component 200 in the detection area can be quickly heated up by 10 to 20° C. within 0.1 to 3 seconds in the early detection period.

[0076] Recording CO 2 Under laser thermal excitation, the temperature change series of the temperature sensor array 62 closest to the center of the detection area is recorded as X4 = {a, b, c ...}, where a, b, c are temperature values ​​at different times;

[0077] CO 2 After the laser scanning area is thermally bent, if there is a gap between the mold 2 and the glass component 200, such as Figure 9a and Figure 9b , then the amplitude of the X4 sequence change is smaller than that without gaps, such as Fig.9c .

[0078] More specifically, see Fig.10 The present invention also adopts an SVM model, takes different laser power densities, glass components 200 and their positions and temperature change series as input, and establishes the association with the fitting curvature after training with experimental data. The SVM model collects laser point thermal features through online integrated detection, such as: laser power density, glass component density, specific heat capacity, thermal conductivity, glass component thickness, center coordinates, temperature change series, and fuses them through the trained SVM model to identify whether there is a thermal bending gap. The main steps are as follows:

[0079] 1. Collect data, and obtain relevant information about the thermal characteristics of the laser point and its fitting arc through orthogonal experimental design / CCD experimental design. Note that X1 = {laser power density}, X2 = {glass component density, specific heat capacity, thermal conductivity}, X3 = {glass component thickness, center coordinates}, X4 = {temperature change sequence}; Y = 0 / 1 (0 = no gap, 1 = a small gap, 2 = a large gap, 3 = obvious defects in the arc); after the data collection is completed, the capacity of the sample library is greater than 300;

[0080] 2. Training model, such as Fig.10 As shown, through the continuous training of the SVM model, the relationship between X (X1, X2, X3, X4) and Y is established, that is, the coupling correlation model between the laser point thermal characteristics and the thermal bending gap is established;

[0081] 3. Defect detection: during the detection, the segmented laser spot thermal features X (X1, X2, X3, X4) are input into the trained SVM model to obtain the identification result Y, and the current identification result is stored in the electronic control module 8;

[0082] The data collection and model training in the first two steps are completed during the production of the device of the present invention, and the SVM model obtained after training is stored in the electric control module 8. The present invention can also detect the curvature of the hot bending of the glass component in real time through the cooperation of laser heating and online temperature sensing, thereby improving the yield rate.

[0083] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A multi-field heat source controllable gradient hot bending and online integrated detection device, used for hot bending of glass components, characterized in that: include: A workbench, a mold, a rotating module, a first heating module, a second heating module, a third heating module, a control module and a shell, wherein the mold, the rotating module, the first heating module and the third heating module are located in the shell, and the control module is connected to the first heating module, the second heating module and the third heating module; the mold is installed above the workbench, the glass component is arranged on the mold, and the rotating module drives the mold to rotate; the first heating module is installed on both sides of the mold and heats the mold and the glass component as a whole; the second heating module is installed on the workbench and located above the mold, and while heating the glass component, the second heating module can also detect the bending degree of the glass component and transmit the data to the control module; the third heating module is installed inside the mold, and adjusts and partially keeps the local temperature of the glass component heated by the second heating module.

2. The multi-field heat source controllable gradient hot bending and online integrated detection device according to claim 1 is characterized by: The mold is provided with a plurality of air holes.

3. The multi-field heat source controllable gradient hot bending and online integrated detection device according to claim 1 is characterized by: The second heating module is a laser heating module, and the control module controls the second heating module to move relative to the mold.

4. The multi-field heat source controllable gradient hot bending and online integrated detection device according to claim 1 is characterized by: The first heating module is an infrared heating module.

5. The multi-field heat source controllable gradient hot bending and online integrated detection device according to claim 1 is characterized by: The third heating module is an electric heating module, which includes an electric heating rod and a temperature sensor array. The electric heating rod and the temperature sensor array are connected to the control module. The electric heating rod performs local heating and local insulation on the mold under the control of the control module according to data from the temperature sensor array.

6. The multi-field heat source controllable gradient hot bending and online integrated detection device according to claim 1 is characterized by: The control module includes a high-pressure nitrogen module, which injects nitrogen into the housing.

7. The multi-field heat source controllable gradient hot bending and online integrated detection device according to claim 1 is characterized by: The rotating module includes a base plate, a left bracket, a right bracket, a left rotating shaft, a right rotating shaft, a gear mechanism, a rotating motor, a support member and a displacement member; the left rotating shaft is installed on the left bracket, the right rotating shaft is installed on the right bracket, the support member, the left bracket and the right bracket are installed on the base plate in sequence, the rotating motor is installed on the support member, the mold is installed between the left rotating shaft and the right rotating shaft, the gear mechanism is installed between the rotating motor and the left rotating shaft, the rotating motor drives the gear mechanism to rotate, and then drives the left rotating shaft to rotate so that the mold rotates; the displacement member is installed on the workbench and connected to the bottom of the base plate, and the displacement member drives the base plate to move linearly.

8. A multi-field heat source controllable gradient hot bending and online integrated detection forming method, characterized in that: The steps include: Step 1, preheating loading, setting a first target temperature of the inner chamber of the shell, preheating the glass component through the first heating module, after reaching the first target temperature, installing the glass component on the mold and judging its flatness and alignment position, the pores on the mold generate negative pressure to adsorb the glass component to the outer surface of the mold, wherein the first target temperature is not less than 230°C; Step 2, hot bending, further heating the mold and the glass component through the first heating module, and when the second target temperature is reached, the glass component is locally and rapidly heated through the second heating module; the control module synchronously controls the movement of the second heating module and the rotation of the mold to achieve multi-field hot bending of the glass component, wherein the second target temperature is not less than 400°C; Step 3, detection, the laser emitted by the second heating module can detect the bending degree of the glass component, and then the control module detects the degree of fit between the glass component and the mold after hot bending through the second heating module. When there is a certain gap between the glass component and the mold after hot bending, the control module controls to increase the temperature of the second heating module, and at the same time, the control module controls the third heating module to heat up the hot bending area until the degree of fit between the glass component and the mold after hot bending meets the requirements; Step 4: Insulate and cool, reset the mold, and locally insulate the hot-bending area of ​​the glass component through the third heating module; after the insulation is completed, turn off the third heating module, and then inject a temperature-controlled airflow into the glass component through the control module to cool the glass component and the mold; turn off the negative pressure of the mold's pores and take out the hot-bent glass component.

9. The multi-field heat source controllable gradient hot bending and online integrated detection forming method according to claim 8, characterized in that: In step 3, when the degree of fit between the glass component and the mold after heat bending meets the requirements, the internal temperature of the mold is measured by the temperature sensor array, and the internal temperature of the mold is maintained at the first target temperature. The mold is then rotated by an angle, and the next area is heat-bent and formed by the second heating module and the third heating module. When the glass component is formed, the second heating module is turned off.

10. The multi-field heat source controllable gradient hot bending and online integrated detection forming method according to claim 8, characterized in that: In step 3, during the hot bending of the glass component under the action of the second heating module and the third heating module, the high-pressure nitrogen module applies a temperature-controllable airflow to the glass component to accelerate the downward bending of the glass component.

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