High-precision curved surface laser radar window processing equipment and processing method thereof

Abstract

The invention belongs to high-precision curved surface laser radar window processing equipment in the technical field of vehicle-mounted laser radars, and further relates to a high-precision curved surface laser radar window processing method. After the annealing step, secondary hot bending mold pressing is carried out, specifically, an upper mold (3) and a lower mold (4) of mold pressing equipment after annealing are turned over, a to-be-machined window raw material (16) is pushed into the position of a third heating cavity again, an upper heating plate (1) makes contact with and heats the upper mold (3), a lower heating plate (2) makes contact with and heats the lower mold (4), the temperature interval is 550-800 DEG C, and the pressure maintaining time is 15-40 minutes; and after the secondary hot bending mould pressing step, cooling forming is carried out. According to the processing method of the high-precision curved surface laser radar window, the steps are simple, curved glass with large curvature and thickness can be conveniently processed, the processing difficulty is reduced, the surface precision of the concave surface and the convex surface of the glass can be effectively controlled, and the production efficiency of the curved surface laser radar window is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle-mounted lidar, and more specifically, relates to a high-precision curved lidar window processing device, and the present invention also relates to a high-precision curved lidar window processing method. Background Art

[0002] With the accelerating development of automotive intelligence, multi-sensor fusion is a key solution for intelligent driving environment perception. Among them, lidar is an effective supplement to cameras, millimeter-wave radars, and ultrasonic radars, and is also considered an essential sensor for autonomous driving above L3 level. The corresponding industrial chain of its components will also have a broad development prospect. The lidar window, as the outermost optical component of the lidar, mainly serves to protect the internal components (laser emitters, photodetectors, and PCB hardware circuit boards, etc.) from dust, moisture, impact, and other potential environmental damages, and has a high transmittance in the wavelength range of 905nm / 1550nm, so that the corresponding laser light source can effectively penetrate the window, encounter an object and reflect back inside, ensuring that the performance of the lidar system is not affected.

[0003] In order to improve the detection performance of vehicle-mounted lidar, it is necessary to control the surface accuracy during the manufacturing process to make its peak-valley PV value and surface irregularity IRR value as low as possible; in addition, for the overall design of the vehicle-mounted lidar to match the aerodynamic characteristics of the vehicle, which is convenient for further reducing wind resistance and improving aesthetics, the existing mainstream window glasses usually adopt a curved surface shape. At present, the manufacturing of the curved lidar window mainly includes two steps: design and processing. The design is mainly based on the strict requirements such as the product size, detection distance, and gravel impact of the lidar to determine parameters such as the material, length, width, thickness, and radius of curvature of the curved window glass, and draw 2D and 3D drawings of the curved window glass, giving the corresponding surface accuracy and optical parameter requirements. The processing step mainly includes processes such as cutting, CNC, and hot bending and molding. Cutting is mainly to cut a large piece of glass into a size close to the requirement, and a knife wheel cutting or laser cutting device can be used; CNC is mainly to grind the edges of the glass based on parameters such as the C angle or R angle given in the drawing, and at the same time, this process can also ensure that the glass is not easily fragmented during the hot bending and molding process; finally, hot bending and molding is mainly to put the glass into a molding die and use a hot pressing device to press out a glass with a certain degree of curvature, and during this process, the surface accuracy and surface quality of the product are ensured through process optimization. Based on the above steps, the processing and production of the curved lidar window glass are completed. In the prior art, when processing special curved window glasses with large glass curvature and thickness, it is difficult to control the surface accuracy and appearance of the window, the production difficulty is high, and the cost cannot be effectively reduced. For example, for a formed glass with a length, width, and thickness of 150*50*4 mm and a radius of curvature of R100 to R500, using the conventional process of hot bending the cover plate to produce, the processing time is long, and the surface accuracy cannot be guaranteed either.

[0004] In the prior art, there is a technology with the name of "an automotive multi-line lidar system" and the publication (announcement) number of "CN119335507A". This technology relates to the field of environmental perception technology and discloses an automotive multi-line lidar system, including an installation base and a protective housing that can be assembled and combined. The top of the installation base is provided with a radar assembly, and the front of the protective housing is provided with a window. The radar assembly includes a servo motor fixedly installed on the top of the installation base, and a rotating mirror tube frame is fixedly connected to the output shaft of the servo motor. An adjustable rotating mirror is hinged to the outside of the rotating mirror tube frame, and a lower locking disk is rotatably installed at the top. In this automotive multi-line lidar system, by adopting a split design of the rotating mirror tube frame and the adjustable rotating mirror, the requirements for processing accuracy and cost are reduced. At the same time, the adjustable rotating mirror is hinged to the rotating mirror tube frame through a plug rod and a plug socket. Rotating the lower locking disk drives the transmission gear to rotate, and the included angle between the adjustable rotating mirror and the rotation axis of the rotating mirror tube frame can be adjusted until the adjustable rotating mirror is adjusted to the assembly requirement, and the adjustment process is easy.

[0005] However, this technology does not address the technical problems and technical solutions of this application. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: in view of the deficiencies of the prior art, to provide a high-precision processing method for a curved surface lidar window with simple steps, which is convenient for processing curved surface glass with large curvature and thickness, reduces the processing difficulty, and can effectively control the surface accuracy of the concave and convex surfaces of the glass, improving the production efficiency of the curved surface lidar window.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] The present invention is a high-precision processing method for a curved surface lidar window. The processing steps of the high-precision processing method for a curved surface lidar window are as follows:

[0009] After the annealing step, enter the secondary hot bending and molding: Flip the upper and lower molds in the molding equipment after annealing, and re-push the raw material of the window to be processed to the position of the No. 3 heating chamber. The upper heating plate contacts and heats the upper mold, that is, the original lower mold, and the lower heating plate contacts and heats the lower mold, that is, the original upper mold. The temperature range is 550-800°C, and the pressure holding time is 15-40 minutes;

[0010] After the secondary hot bending and molding step, enter the cooling and forming: Control the cooling of the upper and lower heating plates, set the temperature of the No. 3 heating chamber to room temperature, and after the temperatures of the upper and lower molds drop below 100°C, complete the hot bending and molding step of the curved surface window, and process to form a finished product of a high-precision curved surface lidar window.

[0011] The annealing step is the S5 step, and the secondary hot bending and molding is the S6 step;

[0012] S1. Preheating step: Place the raw material of the window to be processed flat in the lower mold of the material waiting area, cover the upper mold, and use the push rod to push the hot bending and molding equipment formed by the upper and lower molds into the No. 1 cavity. Control the upper and lower heating plates to generate temperature for preheating, and the temperature range is 200-600°C; After preheating, use the push rod to push the semi-closed upper and lower molds into the No. 2 cavity, and control the upper and lower heating plates to generate temperature for secondary preheating, and the temperature range is 400-800°C; After the raw material of the window to be processed is softened, it fits into the concave cavity of the lower mold, and the prototype structure of the curved surface window is formed by hot bending.

[0013] S2. Pressing step: Push the upper mold and the lower mold of the prototype structure carrying the formed curved window into the No. 3 cavity, with the temperature range of 550 - 850 °C, and lower the upper heating plate until it contacts the upper mold. At this time, the upper mold and the lower mold are in full contact for clamping. The convex block of the upper mold and the concave cavity of the lower mold apply a set pressure 1 to the prototype structure of the curved window, and the pressure holding time is 5 - 40 minutes;

[0014] After step S2, enter S3. Annealing step 1: Push the clamped mold with the window raw material after the pressure holding reaches the set time into the No. 4 cavity of the molding equipment, with the temperature range of 500 - 800 °C, and lower the upper heating plate until it contacts the upper mold. The convex block of the upper mold and the concave cavity of the lower mold are in contact, and apply a pressure 2 greater than pressure 1 to the window raw material to be processed, and the pressure holding time is 5 - 40 minutes.

[0015] After step S3, enter S4. Annealing step 2: Push the clamped mold with the window raw material to be processed after annealing step 1 into the No. 5 cavity of the molding equipment, with the temperature range of 300 - 500 °C. Contact the upper heating plate with the upper mold, and the convex block of the upper mold and the concave cavity of the lower mold are in contact, and apply a pressure 3 greater than pressure 1 to the window raw material to be processed, and hold the pressure for 5 - 20 minutes.

[0016] After step S6, enter S7: Take out the finished product of the high-precision curved lidar window, wipe the surface with a clean cloth and then apply a film.

[0017] Before step S1, select the glass substrate, and use a wheel cutter / laser cutting equipment to process the large flat glass, and cut it into the window raw material to be processed.

[0018] After cutting into the window raw material to be processed, perform CNC edge grinding on the window raw material to be processed based on the requirements of the R corner and C corner edges.

[0019] The molding equipment is provided with five cavities, namely No. 1 cavity, No. 2 cavity, No. 3 cavity, No. 4 cavity, and No. 5 cavity, including two cavities in the preheating section, one cavity in the pressing section, and two cavities in the annealing section.

[0020] The high-precision curved lidar window is processed using the molding equipment. Each cavity of the molding equipment respectively includes an upper heating plate, a lower heating plate. The upper mold is connected to the upper mold lifting component, the lower mold is connected to the lower mold fixing component, the upper heating plate is connected to the upper heating plate lifting component, and the lower heating plate is connected to the lower heating plate lifting and flipping component.

[0021] The upper mold of the hot bending and molding equipment has a convex block, and the lower mold has a concave cavity. After clamping, the upper mold and the lower mold are transferred to different cavities through a push rod.

[0022] Adopting the technical solution of the present invention, the working principle and beneficial effects are as follows:

[0023] The high-precision curved surface lidar window processing method described in the present invention requires improving the structure of the molding equipment. The molding equipment includes an upper heating plate, a lower heating plate, an upper mold, and a lower mold. The upper mold is connected to an upper mold lifting component, the lower mold is connected to a lower mold lifting component, the upper heating plate is connected to an upper heating plate lifting component, and the lower heating plate is connected to a lower heating plate lifting component. In this way, the upper heating plate, the lower heating plate, the upper mold, and the lower mold can respectively achieve lifting control to meet the requirements of different steps in the subsequent processing steps. The upper mold of the hot bending molding equipment has a convex block, and the lower mold has a concave cavity. After the molds are closed, the upper and lower molds are transferred to different cavities through a push rod. The cavities are respectively a No. 1 cavity, a No. 2 cavity, a No. 3 cavity, a No. 4 cavity, and a No. 5 cavity. Different processes can be realized by using different cavities of the molding equipment. There are two cavities for the preheating section, one cavity for the pressing section, and two cavities for the annealing section. Different cavities correspond to the requirements of different steps in the processing stage. The high-precision curved surface lidar window described in the present invention is processed using the molding equipment. In terms of specific process steps, a hot bending process of preheating - pressing - annealing is adopted to initially hot bend the raw material of the window to be processed formed by cutting into the target curved surface window glass. The role of the initial hot bending molding is to make the raw material of the window to be processed reach the softening point and then complete the mold closing by the gravity of the upper mold so that it fits on the surface of the lower mold. In the process of turning the mold over and performing secondary forming, it is mainly to prevent the glass from flowing towards both ends due to gravity, compensate for the surface shape with a high center and low sides at both ends that appears during a section of the annealing process, and at the same time, it can also better release the residual stress of the glass. The core improvement point of the present invention is: adopting a hot bending processing scheme of secondary forming, that is, after completing the initial hot bending process of two sections of preheating, one section of pressing, and two sections of annealing, turning the hot bending mold over and then raising it to an appropriate temperature for secondary pressing to release the residual stress, which can effectively reduce the PV value and IRR value on both sides of the curved surface window glass. Description of the Drawings

[0024] The following briefly describes the content expressed in each drawing of this specification and the marks in the drawings:

[0025] Figure 1 It is a schematic structural diagram when the raw material of the window to be processed described in the present invention is processed in the preheating section;

[0026] Figure 2 It is a schematic structural diagram when the raw material of the window to be processed described in the present invention is processed in the pressure holding section;

[0027] Figure 3 It is a schematic structural diagram when the raw material of the window to be processed described in the present invention is processed in the annealing section;

[0028] Figure 4Schematic diagram of the structure during the heating and pressing section processing of the window raw material to be processed according to the present invention;

[0029] Figure 5 Schematic diagram of the structure during the cooling and annealing section processing of the window raw material to be processed according to the present invention;

[0030] Figure 6 Schematic diagram of the brief process flow during the processing of the window raw material to be processed according to the present invention;

[0031] The reference numerals in the drawings are respectively: 1, upper heating plate; 2, lower heating plate; 3, upper mold; 4, lower mold; 5, upper mold lifting component; 6, lower mold fixing component; 7, upper heating plate lifting component; 8, lower heating plate lifting component; 9, concave cavity; 10, convex block; 11, cavity; 12, window raw material to be processed. Detailed implementation manners

[0032] The following is a further detailed description of the specific implementation manners of the present invention, such as the shapes, structures of the components involved, the mutual positions and connection relationships between the various parts, the functions of the various parts, and the working principles, etc., with reference to the drawings:

[0033] As shown in the attached Figure 1 - attached Figure 6 As shown, the present invention is a high-precision curved surface lidar window processing method, and the processing steps of the high-precision curved surface lidar window processing method are as follows:

[0034] S1. Preheating Step (Preheating Section): Place the window raw material 16 to be processed on the upper mold 3 and the lower mold 4 of the molding equipment. After closing the mold, use the push rod to push the upper mold 3 and the lower mold 4 into the No. 1 cavity for preheating, with the temperature range of 200 - 600 °C; after preheating, push the mold with the window raw material 16 to be processed into the No. 2 cavity of the molding equipment, with the temperature range of 400 - 800 °C; after the window raw material 16 to be processed softens, it adheres to the concave cavity 9 of the lower mold 4, forming the prototype structure of the thermally bent curved window. S2. Pressing Step (Pressure Holding Section): Push the window raw material 16 to be processed with the prototype structure of the curved window and the mold after preheating into the No. 3 cavity using the push rod, with the temperature range of 550 - 850 °C, and lower the upper heating plate 1 to contact the upper mold 3, and the upper mold 3 and the lower mold 4 are in contact. The convex block 10 of the upper mold 3 and the concave cavity 9 of the lower mold 4 apply the set pressure 1 to the prototype structure of the curved window, and the pressure holding time is 5 - 40 minutes. S3. Annealing Step 1 (Annealing Section): Push the mold after pressure holding reaches the set time into the No. 4 cavity, with the temperature range of 500 - 800 °C, and lower the upper heating plate 1 to contact the upper mold 3, and the convex block 10 of the upper mold 3 and the concave cavity 9 of the lower mold 4 are in contact, applying a pressure 2 greater than pressure 1 to the window raw material 16 to be processed (after the temperature drops, the mold expands less, and a greater pressure is required to ensure the same torque as in the pressing section), and the pressure holding time is 5 - 40 minutes. After Step S3, enter S4. Annealing Step 2 (Annealing Section): Push the mold after completing Annealing Step 1 (the mold refers to the upper and lower molds being fully closed, and the raw material has formed the ideal size) into the No. 5 cavity with the temperature range of 300 - 500 °C, contact the upper heating plate 1 with the upper mold 3, and the convex block 10 of the upper mold 3 and the concave cavity 9 of the lower mold 4 are in contact, applying a pressure 3 greater than pressure 1 to the window raw material 16 to be processed, and hold the pressure for 5 - 20 minutes. After Step S4, enter S5. Secondary Thermally Bent Molding (Heating and Pressing Section): Flip the upper mold 3 and the lower mold 4 of the molding equipment after annealing, and push the window raw material 16 to be processed back to the position of the No. 3 heating cavity. The upper heating plate 1 contacts and heats the upper mold (the original lower mold), and the lower heating plate 2 contacts and heats the lower mold (the original upper mold), with the temperature range of 550 - 800 °C, and the pressure holding time is 15 - 40 minutes. This step is to raise the temperature back to near the annealing point of the glass, aiming to reduce and eliminate the residual stress inside the glass and further ensure the surface shape accuracy of the glass after molding. After Step S5, enter S6. Cooling and Forming (Cooling and Annealing Section): Control the cooling of the upper heating plate 1 and the lower heating plate 2, set the temperature of the No. 3 heating cavity to room temperature, so that the temperatures of the upper mold 3 and the lower mold 4 drop to room temperature. After the upper mold 3 and the lower mold 4 cool to below 100 °C, complete the thermally bent molding step of the curved window, and process to form a high-precision curved lidar window finished product. After Step S6, enter S7: Take out the high-precision curved lidar window finished product, wipe the surface with a clean cloth and then apply a film.In view of the deficiencies in the prior art, the above steps propose an improved technical solution. When setting up the structure, it is necessary to improve the structure of the molding equipment. The molding equipment includes an upper heating plate 1, a lower heating plate 2, an upper mold 3, and a lower mold 4. The upper mold 3 is connected to an upper mold lifting component 5, the lower mold 4 is connected to a lower mold lifting component 6, the upper heating plate 1 is connected to an upper heating plate lifting component 7, and the lower heating plate 2 is connected to a lower heating plate lifting component 8. In this way, the upper heating plate 1, the lower heating plate 2, the upper mold 3, and the lower mold 4 can achieve lifting control respectively to meet the requirements of different steps in the subsequent processing steps. The upper mold 3 of the hot bending molding equipment has a convex block 10, and the lower mold 4 has a concave cavity 9. After the molds are closed, the upper and lower molds are transferred to different cavities through a push rod. In this way, the molding equipment forms five cavities 11, namely, cavity No. 1, cavity No. 2, cavity No. 3, cavity No. 4, and cavity No. 5, including two cavities for the preheating section, one cavity for the pressing section, and two cavities for the annealing section. Different cavities correspond to the requirements of different steps in the processing stage. The high-precision curved surface lidar window described in the present invention is processed using the molding equipment. In terms of specific process steps, a hot bending process of preheating-pressing-annealing is adopted to initially hot bend the raw material 16 (flat glass) of the window to be processed formed by cutting into the target curved surface window glass. The role of the initial hot bending molding is to make the raw material 16 of the window to be processed reach the softening point and then complete the mold closing by the gravity of the upper mold so that it fits on the surface of the lower mold; in the process of turning the mold over and performing secondary forming, it is mainly to prevent the glass from flowing to both ends due to gravity, compensate for the surface shape with a high center and low sides at both ends that appears during a section of the annealing process, and at the same time can better release the residual stress of the glass. The core point of the improvement of the present invention is: adopting a hot bending processing scheme of secondary forming, that is, after completing the initial hot bending process of two sections of preheating, one section of pressing, and two sections of annealing, turning the hot bending mold over and then raising it to an appropriate temperature for secondary pressing, so as to release the residual stress, thereby effectively reducing the PV value and IRR value on both sides of the curved surface window glass. The processing method of the high-precision curved surface lidar window described in the present invention has simple steps, is convenient for processing curved surface glass with a large curvature and thickness, reduces the processing difficulty, and effectively controls the surface shape accuracy of the concave and convex surfaces of the glass, improving the production efficiency of the curved surface lidar window.

[0035] Before step S1, select a glass base type and use a wheel cutter / laser cutting equipment to process the large plate flat glass, and cut it into the raw material 16 of the window to be processed. In the above steps, based on the requirements of vehicle regulations such as gravel impact, select a qualified glass base type, use a wheel cutter / laser cutting equipment to process the large plate flat glass, cut it into the raw material 16 of the window to be processed that meets the requirements, and then process the raw material 16 of the window to be processed respectively.

[0036] After being cut into the raw material 16 of the window to be processed, based on the requirements for the R-corner and C-corner edges of the finished window on the design drawing, the raw material of the window to be processed is subjected to CNC edge grinding. The above steps enable the raw material of the window to be processed to have better edge quality and side surface finish, and at the same time improve the strength and performance of the product in subsequent processes, thus enhancing the product quality.

[0037] The high-precision curved surface lidar window described above is processed using a molding press. The molding press includes an upper heating plate 1, a lower heating plate 2, an upper mold 3, a lower mold 4. The upper mold 3 is connected to an upper mold lifting component 5, the lower mold 4 is connected to a lower mold lifting component 6, the upper heating plate 1 is connected to an upper heating plate lifting component 7, and the lower heating plate 2 is connected to a lower heating plate lifting and flipping component 8. The upper mold 3 of the hot bending molding press has a convex block 10, and the lower mold 4 has a concave cavity 9. After the molds are closed, the upper and lower molds are transferred to different cavities through a push rod. The molding press is provided with five cavities 11, namely the No. 1 cavity, the No. 2 cavity, the No. 3 cavity, the No. 4 cavity, and the No. 5 cavity, two cavities for the preheating section, one cavity for the pressing section, and two cavities for the annealing section. The structure of the above equipment meets the requirements of the hot bending processing scheme for secondary forming.

[0038] The present invention relates to a high-precision curved surface lidar window processing equipment. The processing equipment is provided with five cavities, namely the No. 1 cavity 11, the No. 2 cavity 12, the No. 3 cavity 13, the No. 4 cavity 14, and the No. 5 cavity 15. Each cavity respectively includes a corresponding set of upper mold 3 and lower mold 4. The cavities include two cavities for the preheating section, one cavity for the pressing section, and two cavities for the annealing section.

[0039] The high-precision curved surface lidar window described above is processed using a molding press. Each cavity of the molding press respectively includes an upper heating plate 1, a lower heating plate 2. The upper mold 3 is connected to an upper mold lifting component 5, the lower mold 4 is connected to a lower mold fixing component 6, the upper heating plate 1 is connected to an upper heating plate lifting component 7, and the lower heating plate 2 is connected to a lower heating plate lifting and flipping component 8.

[0040] The upper mold 3 of the hot bending molding press has a convex block 10, and the lower mold 4 has a concave cavity 9. After the upper and lower molds are closed, the upper mold 3 and the lower mold 4 are transferred to different cavities through a push rod.

[0041] The high-precision curved surface lidar window processing equipment includes a preheating section, a pressure holding section, an annealing section, a heating and pressing section, and a cooling and annealing section.

[0042] The preheating section corresponds to the No. 1 cavity 11 formed by a set of upper mold 3 and lower mold 4.

[0043] The pressure holding section corresponds to the No. 2 cavity 12 formed by a set of upper mold 3 and lower mold 4.

[0044] The annealing section corresponds to the No. 3 cavity 13 formed by a set of upper die 3 and lower die 4.

[0045] The heating and pressing section corresponds to the No. 4 cavity 14 formed by a set of upper die 3 and lower die 4.

[0046] The cooling and annealing section corresponds to the No. 5 cavity 15 formed by a set of upper die 3 and lower die 4.

[0047] For the method and device of the present invention, when the structure is set, it is necessary to improve the structure of the molding equipment. The molding equipment includes an upper heating plate 1, a lower heating plate 2, an upper die 3, and a lower die 4. The upper die 3 is connected to the upper die lifting component 5, the lower die 4 is connected to the lower die lifting component 6, the upper heating plate 1 is connected to the upper heating plate lifting component 7, and the lower heating plate 2 is connected to the lower heating plate lifting component 8. In this way, the upper heating plate 1, the lower heating plate 2, the upper die 3, and the lower die 4 can respectively achieve lifting control to meet the requirements of different steps in the subsequent processing steps. The upper die 3 of the hot bending and molding equipment has a convex block 10, and the lower die 4 has a concave cavity 9. After the upper and lower dies are closed, they are transferred to different cavities through a push rod. In this way, the molding equipment forms five cavities 11, namely the No. 1 cavity, the No. 2 cavity, the No. 3 cavity, the No. 4 cavity, and the No. 5 cavity, two cavities for the preheating section, one cavity for the pressing section, and two cavities for the annealing section. Different cavities correspond to the requirements of different steps in the processing stage. The high-precision curved surface lidar window described in the present invention is processed using the molding equipment. In terms of specific process steps, a hot bending process of preheating - pressing - annealing is adopted to initially hot bend the raw material 16 (flat glass) of the window to be processed formed by cutting into the target curved surface window glass. The role of the initial hot bending and molding is to make the raw material 16 of the window to be processed reach the softening point and then complete the mold closing by the gravity of the upper die so that it fits on the surface of the lower die; in the process of turning the mold over and performing secondary forming, it is mainly to prevent the glass from flowing to both ends due to gravity, compensate for the surface shape with a high center and low sides at both ends that appears during a section of the annealing process, and at the same time, it can also better release the residual stress of the glass. The core improvement point of the present invention is: adopting a hot bending processing scheme of secondary forming, that is, after completing the initial hot bending process of two sections of preheating, one section of pressing, and two sections of annealing, turning the hot bending mold over and then raising it to a suitable temperature for secondary pressing to release the residual stress, thereby effectively reducing the PV value and IRR value on both sides of the curved surface window glass.

[0048] The present invention has been described exemplarily above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A high-precision curved surface laser radar window processing method, characterized in that: The processing steps of the high-precision curved surface laser radar window processing method are as follows: After the annealing step, the second hot bending molding process is performed: the upper mold (3) and the lower mold (4) in the molding device after annealing are turned over, and the window raw material (16) to be processed is pushed back into the No. 3 heating chamber position, the upper heating plate (1) contacts and heats the upper mold, that is, the original lower mold, and the lower heating plate (2) contacts and heats the lower mold, that is, the original upper mold, the temperature range is 550-800°C, and the holding time is 15-40 minutes; After the second hot bending and molding step, the cooling molding step is entered: the upper heating plate (1) and the lower heating plate (2) are controlled to cool down, and the temperature of the No. 3 heating chamber is set to room temperature. After the temperature of the upper mold (3) and the lower mold (4) drops below 100°C, the hot bending and molding step of the curved window is completed, and a high-precision curved lidar window product is formed.

2. The high-precision curved surface laser radar window processing method according to claim 1, characterized in that: The annealing step is step S5, and the secondary hot bending molding is step S6; S1. Preheating step: After placing the window raw material (16) to be processed flatly in the lower mold (4) in the material waiting area, cover it with the upper mold (3), use a push rod to push the hot bending molding equipment formed by the upper mold (3) and the lower mold (4) into the No. 1 cavity, control the temperature of the upper heating plate (1) and the lower heating plate (2) to preheat, and the temperature range is 200-600°C; after preheating, use a push rod to push the half-closed upper mold (3) and the lower mold (4) into the No. 2 cavity, control the temperature of the upper heating plate (1) and the lower heating plate (2) to perform secondary preheating, and the temperature range is 400-800°C; after softening, the window raw material (16) to be processed is attached to the concave cavity (9) of the lower mold (4), and hot bending is performed to form a prototype structure of the curved window; S2. Pressing step: Push the upper mold (3) and the lower mold (4) carrying the prototype structure of the curved window into cavity No. 3, the temperature range is 550-850°C, and lower the upper heating plate (1) to contact the upper mold (3), the upper mold (3) and the lower mold (4) are now completely in mold contact, the convex block (10) of the upper mold (3) and the concave cavity (9) of the lower mold (4) give the prototype structure of the curved window a set pressure of 1, and the pressure holding time is 5-40 minutes.

3. The high-precision curved surface laser radar window processing method according to claim 2, characterized in that: After step S2, enter step S3. Annealing step 1: push the upper mold (3) and the lower mold (4) with the window material to be processed (16) after holding the pressure for a set time into cavity No. 4, the temperature range is 500-800°C, and the upper heating plate (1) is lowered to contact the upper mold (3), the convex block (10) of the upper mold (3) and the concave cavity (9) of the lower mold (4) are in contact, and a pressure 2 greater than the pressure 1 is applied to the window material to be processed (16), and the holding time is 5-40 minutes.

4. The high-precision curved surface laser radar window processing method according to claim 3 is characterized in that: After step S3, enter step S4. Annealing step 2: push the mold with the window raw material (16) to be processed after annealing step 1 into cavity No. 5 of the molding equipment, the temperature range is 300-500°C, the upper heating plate (1) is in contact with the upper mold (3), the convex block (10) of the upper mold (3) is in contact with the concave cavity (9) of the lower mold (4), and a pressure 3 greater than pressure 1 is applied to the window raw material (16) to be processed, and the pressure is maintained for 5-20 minutes.

5. The high-precision curved surface laser radar window processing method according to claim 4, characterized in that: After step S6, enter S7: take out the finished product of the high-precision curved lidar window, wipe the surface with a clean cloth, and then coat it.

6. The high-precision curved surface laser radar window processing method according to claim 1 or 2, characterized in that: Before step S1, a glass base is selected, and a knife wheel cutting device / laser cutting device is used to process the large plate of flat glass and cut it into window raw materials to be processed (16).

7. The high-precision curved surface laser radar window processing method according to claim 6, characterized in that: After being cut into the window raw material to be processed (16), the window raw material to be processed is subjected to CNC edge grinding processing based on the R angle and C angle edge requirements.

8. The high-precision curved surface laser radar window processing device according to any one of claims 1 to 7, wherein: The processing equipment is provided with five cavities, namely cavity No. 1 (11), cavity No. 2 (12), cavity No. 3 (13), cavity No. 4 (14), cavity No. 5 (15), two cavities of preheating sections, one cavity of pressing section and two cavities of annealing sections.

9. The high-precision curved surface laser radar window processing equipment according to claim 8, characterized in that: The high-precision curved laser radar window is processed using a molding device, each cavity of the molding device comprises an upper heating plate (1) and a lower heating plate (2), an upper mold (3) is connected to an upper mold lifting component (5), a lower mold (4) is connected to a lower mold fixing component (6), an upper heating plate (1) is connected to an upper heating plate lifting component (7), and a lower heating plate (2) is connected to a lower heating plate lifting and flipping component (8).

10. The high-precision curved surface laser radar window processing equipment according to claim 9, characterized in that: The upper mold (3) of the hot bending molding equipment has a convex block (10), and the lower mold (4) has a concave cavity (9). After the upper mold (3) and the lower mold (4) are closed, they are transferred to different cavities through a push rod.

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