Hot bending furnace, remote lens produced based on hot bending furnace and preparation method of remote lens

Abstract

The invention relates to the technical field of remote mirrors, and provides a hot bending furnace, a remote mirror produced based on the hot bending furnace and a preparation method of the remote mirror, and the preparation method of the remote mirror comprises the following steps: obtaining expansion parameters according to basic parameters of a target workpiece; according to the expansion parameters, a hot bending forming mold is obtained; real-time temperature data of the glass are monitored in real time, and a temperature distribution diagram of the glass is obtained; a hot bending temperature optimization model used for adjusting and optimizing temperature rise parameters of the glass is constructed, the glass is heated according to the hot bending temperature optimization model and the temperature distribution diagram, and the real-time temperature value of the glass is controlled; performing hot bending forming treatment on the glass by controlling the action of the selected hot bending forming mold to obtain a target workpiece; and preparing the remote mirror through the target workpiece. According to the method, the hot bending forming mold is obtained to be matched with the hot bending furnace temperature optimization process, so that the curvature of the hot-bent glass is more stable, the yield can be improved, and the quality requirement of a remote lens product for small lens curvature deviation is met.

Description

Technical Field

[0001] The present invention relates to the technical field of telescopes, and in particular to a heat bending furnace, a telescope produced based on the heat bending furnace, and a preparation method thereof. Background Art

[0002] Telescopes are a type of glass hot bending product. They are mainly used in vision testing and myopia prevention and control, and protect eye health by changing the visual distance and reducing the time of using the eyes at close range. Ordinary hot bending products do not have high requirements for the curvature of the bend. As long as the curvature deviation is not greater than 100R, they are all qualified products. Therefore, the current hot bending furnace can meet the production needs of ordinary products.

[0003] However, the curvature deviation of the lens required by the telescope cannot exceed 20R. The existing thermal bending furnace has the problem of unstable deviation and low yield, which cannot meet the requirements of the telescope for the curvature deviation of the lens. Summary of the invention

[0004] In order to solve the problems of unstable deviation and low yield rate in the existing heat bending furnace, and the inability to meet the requirements of the telescope for the curvature deviation of the lens, the present application provides a heat bending furnace, a telescope produced based on the heat bending furnace, and a preparation method thereof, which heats the glass according to the heat bending temperature optimization model and the temperature distribution diagram of the glass, and performs heat bending and forming processing on the glass by controlling the action of the selected heat bending forming mold. By obtaining the heat bending forming mold and the heat bending furnace temperature optimization process, the curvature of the glass after heat bending can be made more stable, the yield rate can be improved, and the quality requirements of the telescope product for small curvature deviation of the lens can be met. The specific technical scheme is as follows:

[0005] A hot bending furnace comprises a furnace body and a controller; the controller comprises:

[0006] A parameter acquisition module is used to obtain expansion parameters according to the basic parameters of the target workpiece;

[0007] A mold selection module, used for obtaining a hot bending forming mold according to the expansion parameters;

[0008] A temperature control module is used to monitor the real-time temperature data of the glass in real time and obtain a temperature distribution diagram of the glass;

[0009] A model building module, used to build a hot bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass;

[0010] A control module is used to heat the glass according to the hot bending temperature optimization model and the temperature distribution diagram, control the real-time temperature value of the glass, and perform hot bending processing on the glass by controlling the selected hot bending forming mold action to obtain the target workpiece.

[0011] The heat bending furnace obtains a heat bending forming mold according to the expansion parameters. The heat bending forming mold matches the target workpiece and is more stably heated, which can reduce the influence of the mold on the curvature deviation of the heat-bent glass and improve the yield rate of the target workpiece obtained. By constructing a heat bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass, the glass is heated according to the heat bending temperature optimization model and the temperature distribution diagram, the real-time temperature value of the glass is controlled, and the glass is heat-bent by controlling the selected heat bending forming mold action, which can improve the stability and consistency of the product. By obtaining a heat bending forming mold and cooperating with a heat bending furnace temperature optimization process based on the heat bending temperature optimization model, the curvature of the glass after heat bending can be made more stable, the yield rate can be improved, and the quality requirements of telephoto products for small lens curvature deviation can be met.

[0012] Preferably, the parameter acquisition module includes:

[0013] A function building unit, used to build a curvature deviation-expansion parameter mapping function;

[0014] An expansion parameter mapping unit, used to obtain an expansion parameter according to the curvature deviation-expansion parameter mapping function;

[0015] Wherein, the basic parameters include curvature deviation.

[0016] Preferably, the control module comprises:

[0017] A region division unit, used for dividing the temperature distribution map into regions;

[0018] A real-time temperature acquisition unit, used to acquire the real-time temperature value of each of the areas;

[0019] A control unit is used to monitor and adjust the real-time temperature value of each of the areas according to the hot bending temperature optimization model.

[0020] Preferably, the mold selection module includes:

[0021] Mold material mapping unit, used to build expansion parameter-material mapping model;

[0022] A material parameter acquisition unit, used for acquiring mold material parameters according to the expansion parameter-material mapping model;

[0023] The mold selection unit is used to select a corresponding hot bending forming mold according to the mold material parameters.

[0024] A telescope produced based on a heat bending furnace comprises a lens, wherein the lens is produced and processed by the heat bending furnace.

[0025] Preferably, the lens is a concave mirror, and the curvature deviation of the concave mirror is not greater than 20R.

[0026] A method for preparing a telescope, comprising the following steps:

[0027] According to the basic parameters of the target workpiece, the expansion parameters are obtained;

[0028] According to the expansion parameters, obtaining a hot bending forming die;

[0029] Real-time monitoring of the real-time temperature data of the glass to obtain a temperature distribution diagram of the glass;

[0030] Constructing a hot bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass, heating the glass according to the hot bending temperature optimization model and the temperature distribution diagram, and controlling the real-time temperature value of the glass;

[0031] The target workpiece is obtained by controlling the selected hot bending forming mold to perform hot bending forming processing on the glass;

[0032] The telescope is manufactured by using the target workpiece.

[0033] Preferably, according to the basic parameters of the target workpiece, the specific method for obtaining the expansion parameters includes the following steps:

[0034] Constructing curvature deviation-expansion parameter mapping function;

[0035] Acquire an expansion parameter according to the curvature deviation-expansion parameter mapping function;

[0036] Wherein, the basic parameters include curvature deviation.

[0037] Preferably, the specific method of heating the glass according to the thermal bending temperature optimization model and the temperature distribution diagram and controlling the real-time temperature value of the glass comprises the following steps:

[0038] Dividing the temperature distribution map into regions;

[0039] Obtaining the real-time temperature value of each of the areas;

[0040] According to the hot bending temperature optimization model, the real-time temperature value of each of the areas is monitored and adjusted.

[0041] Preferably, according to the expansion parameters, a specific method for obtaining a hot bending forming die comprises the following steps:

[0042] Constructing the expansion parameter-material mapping model;

[0043] Acquiring mold material parameters according to the expansion parameter-material mapping model;

[0044] According to the mold material parameters, select the corresponding hot bending forming mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0046] Figure 1 It is a schematic diagram of the overall process of a method for preparing a telescope in one embodiment of the present invention;

[0047] Figure 2 is a flowchart of a specific method for obtaining expansion parameters in one embodiment of the present invention;

[0048] Figure 3 is a schematic flow chart of a specific method for obtaining a hot bending forming mold in one embodiment of the present invention;

[0049] Figure 4 is a flow chart of a specific method for controlling the real-time temperature value of glass in one embodiment of the present invention;

[0050] Figure 5 It is a partial structural top view of a hot bending forming mold in one embodiment of the present invention;

[0051] Figure 6 It is a partial structural front view of a hot bending forming mold in one embodiment of the present invention;

[0052] Figure 7 is a top view of a lens produced based on a method for preparing a telephoto lens in one embodiment of the present invention;

[0053] Figure 8 It is a cross-sectional view of a lens produced based on a method for preparing a telephoto lens in one embodiment of the present invention. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0055] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0057] Embodiment 1:

[0058] Before describing the embodiments of the present invention, a brief introduction to the prior art is given first.

[0059] A telescope is an auxiliary tool for vision correction. It increases the distance between objects and images through the mirror reflection of a concave mirror, thereby reducing the purpose of close-up vision. There are two main designs on the market, one is head-mounted and the other is bracket-mounted. In a telescope, the curvature deviation of the concave mirror is generally required to be no more than 20R. The 20R here means that the curvature deviation of the concave mirror is within ±20R. Here, if 100R means that the radius of curvature is 100 mm, then 20R can be understood as 20 mm. Among them, the concave mirror can be prepared by hot bending the glass in a hot bending furnace. Existing hot bending furnaces have problems such as unstable deviation and low yield, and cannot meet the requirements of telescopes for lens curvature deviation.

[0060] In order to solve the problems existing in the conventional hot bending furnace, this embodiment provides a hot bending furnace, including a furnace body and a controller.

[0061] The furnace body is provided with a furnace for heating the glass and a mold for hot bending the heated glass that matches the target workpiece. Since the structure of the specific parts of the hot bending furnace including the furnace and the mold belongs to the conventional technical means in the field, it will not be described here.

[0062] The controller includes a parameter acquisition module, a mold selection module, a temperature control module, a model building module and a control module.

[0063] The parameter acquisition module is used to acquire expansion parameters according to basic parameters of the target workpiece; the basic parameters include but are not limited to the type of the target workpiece and curvature deviation parameters.

[0064] Preferably, the parameter acquisition module includes a function construction unit and an expansion parameter mapping unit.

[0065] The function construction unit is used to construct a curvature deviation-expansion parameter mapping function; and the expansion parameter mapping unit is used to obtain the expansion parameter according to the curvature deviation-expansion parameter mapping function.

[0066] The curvature deviation-expansion parameter mapping function represents the mapping relationship between the curvature deviation and the expansion parameter, which can be constructed by taking the curvature deviation as an independent variable and the expansion parameter as a dependent variable, or by obtaining a corresponding expansion parameter range based on the curvature deviation according to a preset function formula. The expansion parameter mapping unit obtains the expansion parameter matching the curvature deviation according to the constructed curvature deviation-expansion parameter mapping function.

[0067] Here, the expansion parameter includes but is not limited to the expansion coefficient.

[0068] By obtaining the expansion parameters according to the basic parameters of the target workpiece, the mold selection module can select an appropriate hot bending forming mold to avoid affecting the curvature of the hot bent glass due to the mismatch between the expansion parameters and the basic parameters of the target workpiece.

[0069] The mold selection module is used to obtain a hot bending forming mold according to the expansion parameters; specifically, a matching material is selected according to the expansion parameters, and then a hot bending forming mold corresponding to the material is selected, or a mold is opened according to the material to obtain the hot bending forming mold.

[0070] The temperature control module is used to monitor the real-time temperature data of the glass in real time and obtain the temperature distribution diagram of the glass. Specifically, the real-time temperature data of the glass can be monitored in real time by an infrared temperature acquisition unit, and the temperature distribution diagram of the glass can be obtained based on the real-time temperature data.

[0071] The model building module is used to build a hot bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass; the temperature rise parameters include but are not limited to the temperature rise rate and the heating temperature range.

[0072] The control module is used to heat the glass according to the hot bending temperature optimization model and the temperature distribution diagram, control the real-time temperature value of the glass, and perform hot bending processing on the glass by controlling the selected hot bending forming mold action to obtain the target workpiece.

[0073] Specifically, the control module controls the furnace temperature according to the hot bending temperature optimization model and the temperature distribution diagram, such as the furnace gas flow rate, the working status of several gas nozzles (including the number and angle relative to the glass), the speed of the heat circulation fan and the wind direction, etc., to heat the glass, control the real-time temperature value of the glass, and when the glass is heated to a preset temperature value, such as a preset softening point temperature, control the action of the hot bending forming mold to perform hot bending forming on the glass, thereby completing the hot bending forming operation on the heated glass.

[0074] The hot bending forming mold includes a matching female mold and a male mold. The hot bending furnace also includes a telescopic component such as a hydraulic rod for driving the male mold to move back and forth relative to the female mold. The hydraulic rod drives the male mold to move and approach the female mold to squeeze the heated glass on the female mold so that the glass fits on the surface of the female mold, thereby completing the hot bending forming operation of the glass.

[0075] Since the specific structure of the telescopic assembly used to drive the male mold to move relative to the female mold to achieve hot bending of glass belongs to conventional technical means in the field, it will not be described in detail here.

[0076] By constructing the heat bending temperature optimization model and optimizing the temperature control process of the heat bending furnace, it is possible to avoid the problem of glass heating up too quickly, which may cause cracking due to uneven heating, and improve the yield rate.

[0077] Combining the hot bending forming mold and the hot bending temperature optimization model, the impact of the mold on the curvature of the glass is reduced, thereby avoiding the glass from cracking due to uneven heating and improving the stability and consistency of the product.

[0078] In summary, the hot bending furnace obtains a hot bending forming mold according to the expansion parameters, and the hot bending forming mold matches the target workpiece, and its heating is more stable, which can reduce the influence of the mold on the curvature deviation of the hot bent glass, and improve the yield rate of the obtained target workpiece; by constructing a hot bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass, the glass is heated according to the hot bending temperature optimization model and the temperature distribution map, the real-time temperature value of the glass is controlled, and the glass is hot bent by controlling the selected hot bending forming mold action, which can improve the stability and consistency of the product. By obtaining a hot bending forming mold and cooperating with a hot bending furnace temperature optimization process based on the hot bending temperature optimization model, the curvature of the glass after hot bending can be made more stable, the yield rate can be improved, and the quality requirements of telephoto products for small lens curvature deviation can be met.

[0079] As a preferred technical solution, the control module includes a region division unit, a real-time temperature acquisition unit and a control unit.

[0080] The area division unit is used to divide the temperature distribution diagram into areas; the technical personnel can divide the temperature distribution diagram into areas according to their experience, and divide it into a plurality of temperature distribution areas with preset area sizes.

[0081] The real-time temperature acquisition unit is used to acquire the real-time temperature value of each of the regions. Here, for the region, multiple temperature sampling points are acquired, and the real-time temperature average of the multiple temperature sampling points is used as the real-time temperature value.

[0082] The control unit is used to monitor and adjust the real-time temperature value of each of the areas according to the hot bending temperature optimization model.

[0083] According to the heat bending temperature optimization model, the furnace temperature is controlled, such as the furnace gas flow rate, the working status of several gas nozzles (including the number and angle relative to the glass), the speed of the heat circulation fan and the wind direction, etc., to heat the glass so that the real-time temperature value of each area meets the preset temperature rise parameters to avoid cracking of the glass due to excessive heating, ensure the stability of the product, and improve the yield rate.

[0084] The mold selection module includes a mold material mapping unit, a material parameter acquisition unit and a mold selection unit.

[0085] The mold material mapping unit is used to construct an expansion parameter-material mapping model; the material parameter acquisition unit is used to acquire the mold material parameters according to the expansion parameter-material mapping model; and the mold selection unit is used to select a corresponding hot bending forming mold according to the mold material parameters.

[0086] The expansion parameter-material mapping model can be understood as a mapping relationship between a preset expansion coefficient and a specific material, and the mapping relationship includes but is not limited to a one-to-one mapping and a one-to-many mapping. The expansion parameter-material mapping model can be obtained by pre-building multiple material sets containing at least one type of mold material parameters, and then building a specific mapping relationship between different expansion parameters and the material sets.

[0087] After the expansion parameters are obtained, one type of mold material parameters is selected from a material set corresponding to the expansion parameters based on an expansion parameter-material mapping model, and then the hot bending forming mold is obtained according to the selected matching mold material parameters.

[0088] Through the mold selection module, a matching hot bending forming mold can be obtained, reducing the influence of the mold on the curvature of the hot bent glass, avoiding the problem of excessive thermal deformation due to excessive mold expansion coefficient, which in turn leads to excessive deviation of the curvature of the hot bent glass, thereby improving the stability and consistency of the product.

[0089] As a preferred technical solution, the present invention also provides a telescopic lens produced based on a heat bending furnace, including a lens, and the lens is produced and processed by the heat bending furnace.

[0090] Preferably, the lens is a concave mirror, and the curvature deviation of the concave mirror is not greater than 20R.

[0091] The telescope further includes a bracket, a lifting mechanism for adjusting the lens height, a rotating mechanism for adjusting the lens angle, etc. Since the specific structures of the components of the telescope such as the bracket, the lifting mechanism and the rotating mechanism are conventional technical means in the field, they will not be described here.

[0092] In the telescope, since the curvature deviation of the lens is small, the overall quality can be improved, which helps to prevent and control myopia and improve the user experience.

[0093] The present invention also provides a method for preparing a telescope, such as Figure 1 As shown, it includes the following steps:

[0094] S1, obtaining expansion parameters according to basic parameters of the target workpiece; the basic parameters include but are not limited to the type of the target workpiece and curvature deviation parameters, and the expansion parameters are preferably expansion coefficients.

[0095] The target workpiece can be understood as a lens in a telescope, such as a concave mirror.

[0096] Preferably, if Figure 2 As shown, according to the basic parameters of the target workpiece, the specific method for obtaining the expansion parameters includes the following steps: constructing a curvature deviation-expansion parameter mapping function; and obtaining the expansion parameters according to the curvature deviation-expansion parameter mapping function.

[0097] The curvature deviation-expansion parameter mapping function can be understood as a mapping relationship between the curvature deviation and the expansion parameter, which can be constructed by taking the curvature deviation as an independent variable and the expansion parameter as a dependent variable, or by obtaining a corresponding expansion parameter range based on the curvature deviation according to a preset function formula. The expansion parameter mapping unit obtains the expansion parameter matching the curvature deviation according to the constructed curvature deviation-expansion parameter mapping function.

[0098] S2, obtaining a hot bending forming die according to the expansion parameters.

[0099] in, Figure 5 as well as Figure 6 Shown are a top view and a front view of a partial structure of one of the hot bending forming molds obtained based on the expansion parameters, specifically a top view and a front view of the concave mold structure in the hot bending forming mold.

[0100] Preferably, in step S2, Figure 3 As shown, according to the expansion parameters, the specific method of obtaining the hot bending forming mold includes the following steps:

[0101] S20, constructing an expansion parameter-material mapping model.

[0102] S21, obtaining mold material parameters according to the expansion parameter-material mapping model.

[0103] S22, selecting a corresponding hot bending forming mold according to the mold material parameters.

[0104] The expansion parameter-material mapping model can be understood as a mapping relationship between a preset expansion coefficient and a specific material, and the mapping relationship includes but is not limited to a one-to-one mapping and a one-to-many mapping. The expansion parameter-material mapping model can be obtained by pre-building multiple material sets containing at least one type of mold material parameters, and then building a specific mapping relationship between different expansion parameters and the material sets.

[0105] Through the expansion parameter-material mapping model, a hot bending forming mold that matches the mold material parameters can be obtained, reducing the influence of the mold on the curvature of the hot-bent glass, avoiding the problem of excessive thermal deformation due to excessive mold expansion coefficient, which in turn leads to excessive deviation in the curvature of the hot-bent glass, thereby improving the stability and consistency of the product.

[0106] S3, real-time monitoring of the real-time temperature data of the glass, and obtaining a temperature distribution diagram of the glass.

[0107] S4, constructing a hot bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass, heating the glass according to the hot bending temperature optimization model and the temperature distribution diagram, and controlling the real-time temperature value of the glass.

[0108] like Figure 4 As shown, the specific method of heating the glass according to the thermal bending temperature optimization model and the temperature distribution diagram and controlling the real-time temperature value of the glass includes the following steps:

[0109] S40, dividing the temperature distribution map into regions.

[0110] S40, obtaining a real-time temperature value of each of the areas.

[0111] S40, monitoring and adjusting the real-time temperature value of each of the areas according to the thermal bending temperature optimization model.

[0112] Specifically, the technicians can divide the temperature distribution map into multiple temperature distribution areas with preset area sizes according to their experience. For the area, multiple temperature sampling points are obtained, and the real-time temperature average of the multiple temperature sampling points is used as the real-time temperature value.

[0113] The furnace temperature is controlled according to the thermal bending temperature optimization model, such as the furnace gas flow rate, the working status of several gas nozzles (including the number and angle relative to the glass), the speed of the heat circulation fan and the wind direction, etc., to heat the glass so that the real-time temperature value of each area meets the preset temperature rise parameters to avoid cracking of the glass due to excessive heating, ensure the stability of the product, and improve the yield rate.

[0114] S5, performing a hot bending process on the glass by controlling the selected hot bending mold to move, thereby obtaining the target workpiece.

[0115] Figure 7 as well as Figure 8 Shown are a top view and a cross-sectional view of the target workpiece.

[0116] S6, preparing the telescope using the target workpiece.

[0117] In summary, the telescope prepared and produced by the telescope preparation method is more stably heated because the hot bending forming mold matches the target workpiece, which can reduce the influence of the mold on the curvature deviation of the hot-bent glass and improve the yield rate of the target workpiece obtained; by constructing a hot bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass, heating the glass according to the hot bending temperature optimization model and the temperature distribution diagram, controlling the real-time temperature value of the glass, and hot bending the glass by controlling the selected hot bending forming mold action, the stability and consistency of the lens can be improved. By combining the hot bending forming mold with the hot bending temperature optimization model, the curvature of the glass after hot bending can be made more stable, and lenses with small curvature deviation can be obtained, thereby improving the quality, helping to prevent and control myopia, and improving user experience.

[0118] Embodiment 2:

[0119] It should be understood that this embodiment at least includes all the technical features of the above embodiments, and is further described in detail based on the above embodiments.

[0120] In this embodiment, a curvature deviation-expansion parameter mapping function f∈[e α1 ×p,e α2 ×p]; according to the curvature deviation-expansion parameter mapping function f∈[e α1 ×p,e α2 ×p] to obtain the expansion parameters.

[0121] Wherein, f represents the expansion parameter, e represents the natural constant, p represents the curvature deviation, α1 and α2 represent the preset first mapping coefficient and second mapping coefficient, and α1<α2. The expansion parameter is preferably the expansion coefficient, and the curvature deviation-expansion parameter mapping function f∈[eα1 ×p,e α2 All parameters in [×p] are dimensionless parameters that have been normalized.

[0122] f∈[e α1 ×p,e α2 ×p] can be understood as the interval value of the expansion coefficient f is [e α1 ×p,e α2 ×p], that is, the expansion coefficient of the mold material finally selected should be in the range [e α1 ×p,e α2 ×p].

[0123] Since the first mapping coefficient and the second mapping coefficient are preset values, from f∈[e α1 ×p,e α2 ×p], it can be seen that the expansion coefficient is generally proportional to the curvature deviation, that is, the smaller the curvature deviation, the smaller the expansion coefficient. Through the curvature deviation-expansion parameter mapping function f∈[e α1 ×p,e α2 ×p] to obtain the expansion coefficient, so as to more clearly obtain the material of the matching mold and obtain the hot bending forming mold that matches the mold material parameters, reduce the influence of the mold on the curvature of the hot bent glass, avoid the problem of excessive thermal deformation due to excessive mold expansion coefficient, and then cause excessive deviation of the curvature of the hot bent glass, thereby improving the stability and consistency of the product.

[0124] As a preferred technical solution, in this embodiment, the thermal bending temperature optimization model is expressed as Wherein, ΔT1 represents the temperature rise rate of a single area of ​​the glass, ΔT2 represents the overall temperature rise rate of the glass, which can be represented by the average of the temperature rise rates of multiple areas, e represents a natural constant, r represents the maximum curvature deviation, f represents the expansion coefficient, λ1 and λ2 represent the first temperature rise adjustment coefficient and the second temperature rise adjustment coefficient, T represents the preset temperature rise threshold, T r Represents the real-time temperature value of the glass, which is obtained by calculating the average of the real-time temperature values ​​of multiple areas. max Indicates the maximum heating temperature of the glass.

[0125] The bending temperature optimization model The temperature rise parameters during the glass heating process are linked to the glass expansion coefficient and the curvature deviation of the target workpiece, making the glass heating more in line with the actual situation, further reducing the impact of the mold on the glass curvature, and better avoiding the problem of glass shattering due to uneven heating. By optimizing the local (i.e., each area) and overall temperature rise parameters of the glass, and optimizing the glass bending temperature control process, the present invention adopts a low-temperature slow baking mode, which can not only make the curvature of the glass after bending more stable and meet the product's quality requirements for small curvature deviation, but also provides a new idea for the bending process of telescope lenses.

[0126] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0127] The above-mentioned 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 ordinary technicians in this field, 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 hot bending furnace, comprising a furnace body and a controller, characterized in that: The controller comprises: A parameter acquisition module is used to obtain expansion parameters according to the basic parameters of the target workpiece; A mold selection module, used for obtaining a hot bending forming mold according to the expansion parameters; A temperature control module is used to monitor the real-time temperature data of the glass in real time and obtain a temperature distribution diagram of the glass; A model building module, used to build a hot bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass; A control module is used to heat the glass according to the hot bending temperature optimization model and the temperature distribution diagram, control the real-time temperature value of the glass, and perform hot bending processing on the glass by controlling the selected hot bending forming mold action to obtain the target workpiece.

2. A hot bending furnace control method according to claim 1, characterized in that: The parameter acquisition module includes: A function building unit, used to build a curvature deviation-expansion parameter mapping function; An expansion parameter mapping unit, used to obtain an expansion parameter according to the curvature deviation-expansion parameter mapping function; Wherein, the basic parameters include curvature deviation.

3. A hot bending furnace control method as claimed in claim 2, characterized in that: The control module comprises: A region division unit, used for dividing the temperature distribution map into regions; A real-time temperature acquisition unit, used to acquire the real-time temperature value of each of the areas; A control unit is used to monitor and adjust the real-time temperature value of each of the areas according to the hot bending temperature optimization model.

4. A hot bending furnace control method as claimed in claim 3, characterized in that: The mold selection module includes: Mold material mapping unit, used to build expansion parameter-material mapping model; A material parameter acquisition unit, used for acquiring mold material parameters according to the expansion parameter-material mapping model; The mold selection unit is used to select a corresponding hot bending forming mold according to the mold material parameters.

5. A telescope produced by a hot bending furnace, comprising a lens, characterized in that: The lens is produced by the hot bending furnace as described in any one of claims 1 to 4.

6. The telescope produced by a hot bending furnace as claimed in claim 5, characterized in that: The lens is a concave mirror, and the curvature deviation of the concave mirror is no more than 20R.

7. A method for preparing a telescope, characterized in that: The method for preparing the telescope comprises the following steps: According to the basic parameters of the target workpiece, the expansion parameters are obtained; According to the expansion parameters, obtaining a hot bending forming die; Real-time monitoring of the real-time temperature data of the glass to obtain a temperature distribution diagram of the glass; Constructing a hot bending temperature optimization model for adjusting and optimizing the temperature rise parameters of the glass, heating the glass according to the hot bending temperature optimization model and the temperature distribution diagram, and controlling the real-time temperature value of the glass; The target workpiece is obtained by controlling the selected hot bending forming mold to perform hot bending forming processing on the glass; The telescope is manufactured by using the target workpiece.

8. A method for preparing a telescope according to claim 7, characterized in that: According to the basic parameters of the target workpiece, the specific method of obtaining the expansion parameters includes the following steps: Constructing curvature deviation-expansion parameter mapping function; Acquire an expansion parameter according to the curvature deviation-expansion parameter mapping function; Wherein, the basic parameters include curvature deviation.

9. A method for preparing a telescope according to claim 8, characterized in that: The specific method of heating the glass according to the thermal bending temperature optimization model and the temperature distribution diagram and controlling the real-time temperature value of the glass comprises the following steps: Dividing the temperature distribution map into regions; Obtaining the real-time temperature value of each of the areas; According to the hot bending temperature optimization model, the real-time temperature value of each of the areas is monitored and adjusted.

10. A method for preparing a telescope according to claim 9, characterized in that: According to the expansion parameters, a specific method for obtaining a hot bending forming mold includes the following steps: Constructing the expansion parameter-material mapping model; Acquiring mold material parameters according to the expansion parameter-material mapping model; According to the mold material parameters, select the corresponding hot bending forming mold.

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