High-precision curved surface laser radar window machining equipment

Abstract

The utility model belongs to high-precision curved surface laser radar window processing equipment in the technical field of vehicle-mounted laser radars. The processing equipment is provided with five cavities, namely a first cavity (11), a second cavity (12), a third cavity (13), a fourth cavity (14) and a fifth cavity (15), each cavity comprises a corresponding group of upper molds (3) and lower molds (4), and the cavities comprise two preheating section cavities, a pressing section cavity and two annealing section cavities. The machining equipment for the high-precision curved-surface laser radar window is simple in structure, curved-surface glass large in curvature and thickness can be machined conveniently, the machining difficulty is lowered, 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 utility model belongs to the technical field of vehicle-mounted laser radar, more specifically, it relates to a high-precision curved surface laser radar window processing equipment. BACKGROUND

[0002] With the accelerated development of automobile intelligence, multi-sensor fusion is the key scheme of intelligent driving environment perception, wherein the laser radar is an effective supplement of the camera, millimeter wave radar and ultrasonic wave radar, is also considered as a necessary sensor for L3 level and above automatic driving, and the industry chain corresponding to the parts will have a relatively broad development prospect.The laser radar window as the outermost optical element of the laser radar, its main role is to protect the internal components (laser emitter, photoelectric detector and PCB hardware circuit board, etc.) from dust, moisture, impact and other potential environmental damage, and has high transmittance in the 905nm / 1550nm wave band area, so that the corresponding laser light source can effectively penetrate the window and meet the object reflection and return to the inside, to ensure that the performance of the laser radar system is not affected.

[0003] In order to improve the detection performance of vehicle-mounted laser radar, it is necessary to control the surface accuracy in the manufacturing process, so that the peak-to-valley (PV) value and the surface irregularity (IRR) value are as low as possible. In addition, in order to match the overall design of the vehicle-mounted laser radar with the aerodynamic characteristics of the vehicle, it is convenient to further reduce the wind resistance and improve the aesthetics, and the existing mainstream windshield usually adopts a curved shape. At present, the manufacturing of the curved laser radar windshield mainly has two steps of design and processing. The design mainly determines the parameters of the curved windshield glass such as material, length, width, thickness and curvature radius based on the strict requirements of the product size, detection distance and stone impact of the laser radar, and draws the 2D and 3D drawings of the curved windshield glass, and gives the corresponding surface accuracy and optical parameter requirements. The processing step mainly includes cutting, CNC and hot bending molding processes. The cutting mainly cuts the large glass into the required size, which can use a knife wheel cutting or laser cutting equipment. The CNC mainly grinds the edges of the glass based on the parameters such as C angle or R angle given by the drawing, and the process can also ensure that the glass is not easy to break during the hot bending molding process. Finally, the hot bending molding mainly puts the glass into the molding mold, uses the hot pressing equipment to press the glass with a certain bending degree, and optimizes the process to ensure the surface accuracy and surface quality of the product. Based on the above steps, the curved laser radar windshield glass is processed and manufactured. When the existing technology processes the special curved windshield glass with large bending degree and thickness, the surface accuracy and appearance of the windshield are difficult to control, the manufacturing difficulty is large, and the cost cannot be effectively reduced. For example, for a formed glass with a length of 150 mm, a width of 50 mm, a thickness of 4 mm and a curvature radius of R100-R500, the conventional hot bending cover plate process is used for manufacturing, the processing time is long, and the surface accuracy cannot be guaranteed.

[0004] In the prior art, there is a technology named "Automobile multi-line laser radar system" and a publication (announcement) number "CN119335507A". The technology relates to the field of environmental perception and discloses an automobile multi-line laser radar system. The system comprises an installation base and a protective shell which can be assembled and combined. The top of the installation base is provided with a radar assembly, and the front of the protective shell is provided with a windshield. The radar assembly comprises a servo motor fixedly installed on the top of the installation base, and a rotating mirror pipe frame is fixedly connected to the output shaft of the servo motor. An adjustable rotating mirror is hingedly connected to the outside of the rotating mirror pipe frame, and a lower locking disc is rotatably installed at the top end. The automobile multi-line laser radar system has a split design of the rotating mirror pipe frame and the adjustable rotating mirror, which reduces the requirement for processing precision and cost. Meanwhile, the adjustable rotating mirror is hingedly connected to the rotating mirror pipe frame through a plug-in rod and a plug-in seat. By rotating the lower locking disc to drive the transmission gear to rotate, the included angle between the adjustable rotating mirror and the rotating axis of the rotating mirror pipe frame can be adjusted until the adjustable rotating mirror is adjusted to the assembly requirement, and the adjustment process is easy.

[0005] However, the technology does not involve the technical problems and technical solutions of the application. Utility model content

[0006] The utility model wants to solve the technical problem: in view of prior art's insufficient, provide a kind of simple structure, it is convenient to the curvature and thickness of the curved surface glass of greater curved surface glass for processing, reduce processing difficulty, and can effectively control the face type precision of glass concave surface and convex surface, improve the production efficiency of high-precision curved surface laser radar window processing equipment of curved surface laser radar window.

[0007] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0008] The utility model discloses a kind of high-precision curved surface laser radar window processing equipment, the processing equipment is provided with five cavities, it is 1 cavity, 2 cavity, 3 cavity, 4 cavity, 5 cavity respectively, each cavity includes corresponding a group of upper die and lower die, cavity includes the cavity of two preheating sections, a cavity of pressing section and the cavity of two annealing sections.

[0009] The high-precision curved surface laser radar window is processed using a molding device, each cavity of the molding device includes an upper heating plate, a lower heating plate, an upper die connected to an upper die lifting component, a lower die connected to a lower die fixing component, an upper heating plate connected to an upper heating plate lifting component, and a lower heating plate connected to a lower heating plate lifting and turning component.

[0010] The upper die of the hot bending molding device has a protrusion, the lower die has a recess, and the upper die and the lower die after closing are conveyed to different cavities by a push rod.

[0011] The high-precision curved surface laser radar window processing equipment includes a preheating section, a pressure maintaining section, an annealing section, a temperature rising pressing section, and a cooling annealing section.

[0012] The preheating section corresponds to a 1 cavity formed by a group of upper dies and lower dies.

[0013] The pressure maintaining section corresponds to a 2 cavity formed by a group of upper dies and lower dies.

[0014] The annealing section corresponds to a 3 cavity formed by a group of upper dies and lower dies.

[0015] The temperature rising pressing section corresponds to a 4 cavity formed by a group of upper dies and lower dies.

[0016] The cooling annealing section corresponds to a 5 cavity formed by a group of upper dies and lower dies.

[0017] The technical scheme of the utility model has the following working principles and beneficial effects:

[0018] The high-precision curved-surface laser radar window machining equipment improves the structure of the mould pressing equipment, and the mould pressing equipment comprises an upper heating plate, a lower heating plate, an upper die, a lower die, the upper die is connected with an upper die lifting part, the lower die is connected with a lower die lifting part, the upper heating plate is connected with an upper heating plate lifting part, and the lower heating plate is connected with a lower heating plate lifting part. In this way, the upper heating plate, the lower heating plate, the upper die and the lower die can be controlled to ascend and descend respectively, so as to meet the requirements of different steps in subsequent machining steps. The upper die of the hot bending mould pressing equipment has a protrusion, the lower die has a cavity, the upper and lower dies after being combined are conveyed to different cavities through a push rod, the cavities are a No. 1 cavity, a No. 2 cavity, a No. 3 cavity, a No. 4 cavity and a No. 5 cavity, different cavities of the mould pressing equipment can realize different processes, two preheating cavities, one pressing cavity and two annealing cavities, and different cavities correspond to the requirements of different steps in the machining stage. The high-precision curved-surface laser radar window is machined by using the mould pressing equipment, in terms of specific process steps, a preheating-pressing-annealing hot bending process is adopted, the cut formed raw window material is preliminarily hot bent into a target curved-surface window glass, and the preliminary hot bending pressing function is to make the raw window material adhere to the surface of the lower die after the upper die gravity is completed after the combination; in the process of turning over the die and performing secondary forming, mainly for the glass to flow to both ends due to gravity, compensating the surface type of high center and low sides in the annealing process, and also better releasing the residual stress of the glass. The improvement core point of the utility model is that: a secondary forming hot bending machining scheme is adopted, that is, after completing the preliminary hot bending process of two preheating, one pressing and two annealing, turning over the hot bending die, then raising to a suitable temperature, and then performing secondary pressing, so as to release the residual stress, and the PV value and IRR value of the two surfaces of the curved-surface window glass can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The content expressed by each drawing of the present specification and the marks in the drawings are briefly described as follows:

[0020] Figure 1 It is a structure schematic view of the raw window material to be machined during the preheating process of the utility model;

[0021] Figure 2 It is a structure schematic view of the raw window material to be machined during the preheating process of the utility model;

[0022] Figure 3 It is a structure schematic view of the raw window material to be machined during the preheating process of the utility model;

[0023] Figure 4 It is a structure schematic view of the raw window material to be machined during the preheating process of the utility model;

[0024] Figure 5 The structure schematic diagram of the to-be-processed window raw material during the cooling annealing section processing is described in the utility model.

[0025] Figure 6 The brief process technology schematic diagram of the to-be-processed window raw material during the processing is described in the utility model.

[0026] The marks in the drawing are as follows: 1, upper heating plate; 2, lower heating plate; 3, upper die; 4, lower die; 5, upper die lifting part; 6, lower die fixing part; 7, upper heating plate lifting part; 8, lower heating plate lifting part; 9, concave cavity; 10, convex block; 11, cavity; 12, to-be-processed window raw material. DETAILED DESCRIPTION

[0027] The shape, structure, mutual position and connecting relationship between parts, the function and working principle of each part and the like of the specific implementation mode of the utility model are further explained in detail through the description of the embodiments by referring to the drawings:

[0028] As shown in the drawings, Figure 1 - the drawings, Figure 6 The utility model discloses a high-precision curved surface laser radar window processing equipment, and it is characterized in that: the processing equipment sets five cavities, which are respectively No. 1 cavity 11, No. 2 cavity 12, No. 3 cavity 13, No. 4 cavity 14 and No. 5 cavity 15, each cavity includes a corresponding group of upper die 3 and lower die 4, the cavity includes two preheating section cavities, one compression section cavity and two annealing section cavities.

[0029] The high-precision curved surface laser radar window is processed by using a molding equipment, and each cavity of the molding equipment includes an upper heating plate 1 and a lower heating plate 2, the upper die 3 is connected with the upper die lifting part 5, the lower die 4 is connected with the lower die fixing part 6, the upper heating plate 1 is connected with the upper heating plate lifting part 7, and the lower heating plate 2 is connected with the lower heating plate lifting and overturning part 8.

[0030] The upper die 3 of the hot bending molding equipment has a convex block 10, the lower die 4 has a concave cavity 9, and the upper die 3 and the lower die 4 after closing are conveyed to different cavities through a push rod.

[0031] The high-precision curved surface laser radar window processing equipment includes a preheating section, a pressure maintaining section, an annealing section, a temperature rising compression section and a cooling annealing section.

[0032] The preheating section corresponds to No. 1 cavity 11 formed by a group of upper die 3 and lower die 4.

[0033] The pressure maintaining section corresponds to No. 2 cavity 12 formed by a group of upper die 3 and lower die 4.

[0034] The annealing section corresponds to a group of No. 3 cavities 13 formed by the upper mold 3 and the lower mold 4.

[0035] The temperature rising and pressing section corresponds to a group of No. 4 cavities 14 formed by the upper mold 3 and the lower mold 4.

[0036] The cooling and annealing section corresponds to a group of No. 5 cavities 15 formed by the upper mold 3 and the lower mold 4.

[0037] The application also relates to a high-precision curved-surface laser radar window processing method.

[0038] S1. Preheating step (preheating section): Put the to-be-processed window raw material 16 into the upper die 3 and the lower die 4 of the molding equipment, after the mold is closed, use the push rod to push the upper die 3 and the lower die 4 into the No. 1 cavity for preheating, the temperature interval is 200-600℃; After preheating, the mold with the to-be-processed window raw material 16 placed is pushed into the No. 2 cavity of the molding equipment, the temperature interval is 400-800℃; After the to-be-processed window raw material 16 is softened, it is attached to the concave cavity 9 of the lower die 4, and the embryonic structure of the curved window is formed by hot bending; S2. Pressing step (pressure maintaining section): The to-be-processed window raw material 16 with the curved window embryonic structure after preheating and the mold are pushed into the No. 3 cavity by the push rod, the temperature interval is 550-850℃, and the upper heating plate 1 is lowered to contact the upper die 3, and the upper die 3 and the lower die 4 are in contact, the protrusion 10 of the upper die 3 and the concave cavity 9 of the lower die 4 give the curved window embryonic structure a set pressure 1, and the pressure maintaining time is 5-40 minutes; S3. Annealing step 1 (annealing section): After the mold is pushed into the No. 4 cavity after the pressure maintaining reaches the set time, the temperature interval is 500-800℃, and the upper heating plate 1 is lowered to contact the upper die 3, and the protrusion 10 of the upper die 3 and the concave cavity 9 of the lower die 4 are in contact, giving the to-be-processed window raw material 16 a pressure 2 greater than the pressure 1 (after the temperature decreases, the mold expands less, and a greater pressure needs to be given to ensure the same torque as the pressing section), and the pressure maintaining time is 5-40 minutes. After S3 step, enter S4. Annealing step 2 (annealing section): The mold (the mold refers to the upper die and the lower die being completely closed, and the raw material has formed the desired size) after completing the annealing step 1 is pushed into the No. 5 cavity with a temperature interval of 300-500℃, the upper heating plate 1 and the upper die 3 are in contact, and the protrusion 10 of the upper die 3 and the concave cavity 9 of the lower die 4 are in contact, giving the to-be-processed window raw material 16 a pressure 3 greater than the pressure 1, and the pressure maintaining time is 5-20 minutes. After S4 step, enter S5. Secondary hot bending molding (temperature increasing and pressing section): Turn over the upper die 3 and the lower die 4 of the molding equipment after annealing, and re-push the to-be-processed window raw material 16 into the No. 3 heating cavity position, the upper heating plate 1 contacts and heats the upper die (the original lower die), and the lower heating plate 2 contacts and heats the lower die (the original upper die), the temperature interval is 550-800℃, and the pressure maintaining time is 15-40 minutes. This step is to re-rise to the annealing point of the glass, the purpose is to reduce and eliminate the residual stress in the glass, and further ensure the surface type accuracy of the glass after forming. After S5 step, enter S6. Cooling forming (cooling annealing section): Control the upper heating plate 1 and the lower heating plate 2 to decrease the temperature, set the temperature of the No. 3 heating cavity to normal temperature, so that the temperature of the upper die 3 and the lower die 4 decreases to normal temperature, after the upper die 3 and the lower die 4 are cooled to below 100℃, the hot bending molding forming step of the curved window is completed, and the high-precision curved laser radar window finished product is processed. After S6 step, enter S7: Take out the high-precision curved laser radar window finished product, wipe the surface with a clean cloth, and then coat a film.The above steps, for the deficiencies in the prior art, propose an improved technical solution. When the structure is set, the structure of the molding equipment needs to be improved, and the molding equipment 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 with an upper mold lifting part 5, the lower mold 4 is connected with a lower mold lifting part 6, the upper heating plate 1 is connected with an upper heating plate lifting part 7, and the lower heating plate 2 is connected with a lower heating plate lifting part 8. In this way, the upper heating plate 1, the lower heating plate 2, the upper mold 3 and the lower mold 4 can be respectively controlled to rise and fall to meet the requirements of different steps in the subsequent processing steps. The upper mold 3 of the hot bending molding equipment has a protrusion 10, and the lower mold 4 has a recess 9. After the upper and lower molds are combined, they are conveyed to different cavities by a push rod. In this way, the molding equipment forms five cavities 11, namely a No. 1 cavity, a No. 2 cavity, a No. 3 cavity, a No. 4 cavity and a No. 5 cavity, two preheating cavities, one pressing cavity and two annealing cavities, and different cavities correspond to the requirements of different steps in the processing stage. The high-precision curved surface laser radar window disclosed in the application is processed by using the molding equipment. In terms of specific process steps, the hot bending process of preheating-pressing-annealing is adopted to preliminarily hot bend the cut formed raw window material 16 (flat plate glass) into the target curved surface window glass. The preliminary hot bending molding function is to make the raw window material 16 reach the softening point and then complete the combination on the surface of the lower mold by the gravity of the upper mold; the main purpose of the process of turning over the mold and performing secondary molding is to compensate for the high center and low sides of the surface shape in the annealing process, and also to better release the residual stress of the glass. The improvement core point of the application is that the hot bending processing scheme of secondary molding is adopted, that is, after completing the preliminary hot bending process of two preheating, one pressing and two annealing, the hot bending mold is turned over and then raised to an appropriate temperature for secondary pressing to release the residual stress, so that the PV value and the IRR value of the two sides of the curved surface window glass can be effectively reduced. The processing method of the high-precision curved surface laser radar window disclosed in the application has the advantages of simple steps, easy processing of curved surface glass with large curvature and thickness, low processing difficulty, effective control of the surface shape accuracy of the glass concave and convex surfaces, and improved production efficiency of the curved surface laser radar window.

[0039] Before the S1 step, a glass base is selected, and a cutter wheel cutting device / laser cutting device is used to process a large plate flat glass to cut into a raw window material 16 to be processed. The above step is based on the requirements of stone impact and vehicle regulations, selects a glass base that meets the conditions, uses a cutter wheel cutting device / laser cutting device to process a large plate flat glass to cut into a raw window material 16 to be processed that meets the requirements, and then processes the raw window material 16 to be processed.

[0040] The cutting into the window raw material 16 to be processed, based on the design of the R angle and C angle edge requirements of the window product on the drawing, the CNC edge processing of the window raw material to be processed. The above steps make the window raw material to be processed have better edge quality and side surface finish, at the same time improve the product in the subsequent process has higher strength and performance, improve product quality.

[0041] The high-precision curved surface laser radar window is processed by using a molding device, the molding device comprises an upper heating plate 1, a lower heating plate 2, an upper mold 3, a lower mold 4, the upper mold 3 is connected with an upper mold lifting part 5, the lower mold 4 is connected with a lower mold lifting part 6, the upper heating plate 1 is connected with an upper heating plate lifting part 7, and the lower heating plate 2 is connected with a lower heating plate lifting part 8. The upper mold 3 of the hot bending molding device has a protrusion 10, the lower mold 4 has a recess 9, and the upper and lower molds after closing are conveyed to different cavities through a push rod. The molding device is provided with five cavities 11, namely a No. 1 cavity, a No. 2 cavity, a No. 3 cavity, a No. 4 cavity and a No. 5 cavity, two cavities of a preheating section, a cavity of a pressing section and two cavities of an annealing section. The structure of the above-mentioned device meets the requirements of the hot bending processing scheme of the secondary forming.

[0042] The equipment of the utility model, when setting up, the structure of the mould pressing equipment is improved, the mould pressing equipment includes upper heating plate 1, lower heating plate 2, upper mould 3, lower mould 4, upper mould 3 is connected with upper mould lifting part 5, lower mould 4 is connected with lower mould lifting part 6, upper heating plate 1 is connected with upper heating plate lifting part 7, and lower heating plate 2 is connected with lower heating plate lifting part 8. In this way, upper heating plate 1, lower heating plate 2, upper mould 3 and lower mould 4 can be controlled to lift respectively to meet the requirement of different steps in subsequent processing steps. The upper mould 3 of the hot bending mould pressing equipment has a protruding block 10, the lower mould 4 has a concave cavity 9, and the upper and lower moulds after closing are conveyed to different cavities through a push rod. In this way, the mould pressing equipment forms five cavities 11, which are No. 1 cavity, No. 2 cavity, No. 3 cavity, No. 4 cavity and No. 5 cavity, two cavities of preheating section, one cavity of pressing section and two cavities of annealing section, and different cavities correspond to the requirement of different steps in the processing stage. The high-precision curved surface laser radar window is processed by using the mould pressing equipment, and in terms of specific process steps, the hot bending process of preheating-pressing-annealing is adopted, the cut formed to-be-processed window raw material 16 (flat plate glass) is hot bent into the target curved surface window glass, and the preliminary hot bending mould pressing is to make the to-be-processed window raw material 16 reach the softening point and then be attached to the surface of the lower mould by the gravity of the upper mould after closing; the main purpose of the process of turning over the mould and then performing secondary forming is to make the glass flow to both ends due to gravity, compensate the surface type of high center and low both sides in the one-stage annealing process, and also better release the residual stress of the glass. The improvement core point of the utility model lies in that: the hot bending processing scheme of secondary forming is adopted, that is, after completing the preliminary hot bending process of two-stage preheating, one-stage pressing and two-stage annealing, the hot bending mould is turned over and then is raised to a suitable temperature to perform secondary pressing, so as to release the residual stress, thereby the PV value and the IRR value of the two surfaces of the curved surface window glass can be effectively reduced.

[0043] The utility model has been described above in conjunction with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, as long as various improvements are made by adopting the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, all of which are within the protection scope of the utility model.

Claims

1. A high-precision curved surface lidar window processing equipment, characterized in that: The processing equipment is provided with five cavities, namely, No. 1 cavity (11), No. 2 cavity (12), No. 3 cavity (13), No. 4 cavity (14) and No. 5 cavity (15), each cavity comprising a corresponding set of upper die (3) and lower die (4), the cavity comprising two preheating section cavities, one compression section cavity and two annealing section cavities.

2. The high precision curved-laser-radar window machining apparatus according to claim 1, characterized in that: The high-precision curved surface laser radar window is processed by using a molding equipment, each cavity of the molding equipment comprising an upper heating plate (1), a lower heating plate (2), an upper die (3) connected with an upper die lifting part (5), a lower die (4) connected with a lower die fixing part (6), the upper heating plate (1) connected with an upper heating plate lifting part (7), and the lower heating plate (2) connected with a lower heating plate lifting and overturning part (8).

3. The high precision curved-laser-radar window machining apparatus according to claim 2, characterized in that: The upper die (3) of the hot bending molding equipment has a protrusion (10), and the lower die (4) has a recess (9), and the upper die (3) and the lower die (4) after closing are conveyed to different cavities by a push rod.

4. The high precision curved-laser-radar window machining apparatus according to claim 1 or 2, characterized by: The high-precision curved surface laser radar window processing equipment comprises a preheating section, a pressure maintaining section, an annealing section, a temperature rising compression section and a cooling annealing section.

5. The high precision curved-laser-radar window machining apparatus according to claim 4, characterized in that: The preheating section corresponds to No. 1 cavity (11) formed by a set of upper die (3) and lower die (4).

6. The high precision curved-laser-radar window machining apparatus of claim 4, wherein: The pressure maintaining section corresponds to No. 2 cavity (12) formed by a set of upper die (3) and lower die (4).

7. The high precision curved-laser-radar window machining apparatus of claim 4, wherein: The annealing section corresponds to No. 3 cavity (13) formed by a set of upper die (3) and lower die (4).

8. The high precision curved-laser-radar window machining apparatus of claim 4, wherein: The temperature rising compression section corresponds to No. 4 cavity (14) formed by a set of upper die (3) and lower die (4).

9. The high precision curved-laser-radar window machining apparatus of claim 4, wherein: The cooling annealing section corresponds to No. 5 cavity (15) formed by a set of upper die (3) and lower die (4).

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