Optical glass rod drawing apparatus

Abstract

The application discloses a kind of optical glass rod material drawing device.Belongs to optical glass secondary forming technical field.It mainly solves the problem that the material of optical glass rod material secondary forming parent material end cannot be effectively softened and the shape and shape tolerance of parent material have greater influence on the shape and shape tolerance of secondary forming rod material.Its main features are: including feeding device, heating device, shaping device;Feeding device is clamped parent material by telescopic roller, and parent material is pushed into heating device by push rod, the shell for preventing parent material from toppling at parent material end does not enter heating device, and parent material is uniformly heated and softened throughout the body, and the consistency is good;Heating device includes softening furnace and auxiliary guide sleeve with built-in heating element;Shaping device corrects the shape and shape tolerance of secondary forming rod material by roller and shaping sleeve, and can overcome the influence of parent material shape and shape tolerance on secondary forming rod material.The application has simple structure and is convenient to operate, and is mainly used for drawing of optical glass secondary forming rod material.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of optical glass secondary forming, and particularly relates to an optical glass rod drawing device. BACKGROUND

[0002] At present, the secondary forming technology of optical glass rods mainly has two modes of roller rod and rod drawing. The glass rod produced by the rod drawing mode is firstly sent into a heating furnace in a vertical direction to be heated to be softened, and then is drawn. Generally, the optical glass mother material is clamped or hoisted by using a special tooling fixture, and then is sent into the heating furnace at a certain rate according to the process requirement. In order to avoid the optical glass mother material from falling, the end of the mother material usually needs to be properly treated to adapt to the special tooling. The part of the tooling in contact with the mother material has a certain temperature difference with other parts of the mother material in the heating furnace and cannot be effectively utilized. Meanwhile, in the drawing process of the optical glass rod, the drawn rod is easily affected by the shape and shape tolerance of the mother material, and unqualified products are generated. SUMMARY

[0003] The application aims at the above-mentioned defects, and provides an optical glass rod drawing device.

[0004] The technical solution adopted by the application to solve the technical problem is that the optical glass rod drawing device comprises a feeding device, a heating device and a shaping device. The feeding device is located above the heating device and is used to send the mother material into the heating device. The heating device is used to soften the mother material. The shaping device is located below the heating device and is used to draw the softened mother material and correct the shape and shape tolerance to form a secondary forming rod.

[0005] The feeding device comprises a lower pushing force component, a pushing mechanism and a clamping mechanism. The heating device comprises a softening furnace and an auxiliary guide sleeve. The shaping device comprises a roller and a shaping sleeve.

[0006] The technical solution of the application further comprises a first rack and a second rack. The lower pushing force component is mounted on the first rack. The pushing mechanism is located below the first rack and is connected with the lower pushing force component. The clamping mechanism is located below the pushing mechanism. The softening furnace is mounted on the second rack. The auxiliary guide sleeve is arranged in the softening furnace. The roller and the shaping sleeve are located below the second rack. The roller is a matched pair of rollers. The shaping sleeve is sleeved on the roller.

[0007] The pushing mechanism in the technical solution of the application is composed of a connecting plate, a pushing rod, a shell and a shell reset component; the shell reset component is connected between the connecting plate and the shell, the connecting plate is fixedly connected to the lower pushing rod end of the lower pushing force component; the upper end of the pushing rod is fixedly connected to the connecting plate, the lower end penetrates through the shell and is provided with a flange.

[0008] The clamping mechanism in the technical solution of the application is composed of a guide disc and a telescopic roller; the guide disc is located at the upper side and is provided with a through hole matched with the base material, the through hole is provided with a flange at the lower side to guide the base material; the telescopic roller includes one or more groups of telescopic rollers oppositely arranged, the telescopic roller is a spring pressing wheel, and the base material is clamped to avoid falling by itself.

[0009] The auxiliary guide sleeve in the technical solution of the application includes a guide sleeve and a heating element; the inner cavity of the guide sleeve is funnel-shaped and specifically provided with an upper cavity matched with the base material, a middle cavity for transition and a lower cavity matched with the secondary forming bar, a plurality of mounting holes are arranged in the side wall along the outer periphery of the cavity, and the heating element is mounted in the mounting hole to heat the guide sleeve.

[0010] The shaping sleeve in the technical solution of the application is provided with a groove at the outer edge, the shape and depth of the groove are determined according to the shape and specification of the product, and the product is replaced when it is different; the roller is an electric heating roller containing heating wires in the inside, which provides rotating power for the shaping sleeve and heats the shaping sleeve.

[0011] The feeding port of the auxiliary guide sleeve in the technical solution of the application is concentric with the feeding port of the softening furnace, and the discharging port is the discharging port of the heating device.

[0012] The outer diameter of the shell in the technical solution of the application is greater than the hole diameter of the center hole of the guide disc, the outer diameter of the flange at the lower end of the pushing rod is smaller than the outer diameter of the base material, and the guide disc can block the shell and the shell reset component from entering the heating device.

[0013] The pushing mechanism in the technical solution of the application vertically presses the base material into the heating device at a certain rate under the action of the lower pushing force component; to ensure that the end of the base material is heated, the shell and the shell reset component do not enter the heating device with the base material.

[0014] The optical glass bar drawing device has the advantages of simple structure and convenient operation; the shell at the end of the base material does not enter the heating furnace, the heating state of the end of the base material is improved, the base material is softened in the auxiliary guide sleeve to draw the secondary forming bar, so that the end of the base material is effectively utilized; and the shaped device is used to shape the drawn bar to improve the shape quality of the product. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the schematic diagram of the embodiment structure of the optical glass rod drawing device in the present application.

[0016] Figure 2 is the sectional view of the heating device in the present application.

[0017] Figure 3 is the bottom view of the guide sleeve in the present application.

[0018] Figure 4 is the sectional view of the guide sleeve in the present application. Figure 1 is the enlarged view of A.

[0019] Figure 5 is the sectional view of the guide sleeve in the present application. Figure 1 is the enlarged view of B.

[0020] Figure 6 is the sectional view of the guide sleeve in the present application. Figure 1 is the sectional view of the guide sleeve in the present application.

[0021] In the figure: 110 - first bracket; 120 - second bracket; 200 - feeding device; 210 - lower pushing force component; 220 - pushing mechanism; 221 - connecting plate; 222 - pushing rod; 223 - sheath; 224 - sheath resetting component; 230 - clamping mechanism; 231 - guide disc; 232 - telescopic roller; 300 - heating device; 310 - softening furnace; 320 - auxiliary guide sleeve; 321 - guide sleeve; 322 - heating element; 400 - shaping device; 410 - roller; 420 - shaping sleeve; 500 - base material; 600 - secondary forming rod. DETAILED DESCRIPTION

[0022] The embodiment of the present application will be described in detail below in combination with the drawings of the present application.

[0023] As shown in the figure, one embodiment of the optical glass rod drawing device in the present application comprises a feeding device 200, a heating device 300 and a shaping device 400. Figure 1 The feeding device 200 is placed on the first bracket 110, the heating device 300 is placed on the second bracket 120, and the shaping device 400 is placed below the second bracket. The first bracket 110, the second bracket 120 and the shaping device 400 are fixed on the frame of the drawing device.

[0024] The feeding device 200 comprises a lower pushing force component 210, a pushing mechanism 220 and a clamping mechanism 230. The lower pushing force component 210 is placed on the first bracket 110 and connected to the pushing mechanism 220 at the lower end thereof. The clamping mechanism 230 is placed below the pushing mechanism 220 and directly above the feeding port of the heating device 300. The clamping mechanism 230 is fixed on the frame of the drawing device.

[0025]

[0026] ​The feeding mechanism 220 consists of a connecting plate 221, a push rod 222, a protective shell 223 and a protective shell reset component 224, and the clamping mechanism 230 consists of a guide plate 231 and a telescopic roller 232.

[0027] like Figure 1 , Figure 4 As shown, the downward pushing force component 210 can be of various types, preferably an electric cylinder, which controls its speed by controlling the frequency of the output current. It also has a compact structure and can adapt to high ambient temperatures. The connecting plate 221 connects the downward pushing force component 210 to the pushing mechanism 220. The push rod 222 is fixed under the connecting plate 221 and has a protective shell reset component 224 fitted on its outer side. The upper end of the protective shell reset component 224 presses against the connecting plate 221, and the lower end presses against the protective shell 223 located at the lower flange of the push rod 222. The protective shell reset component 224 is preferably a high-temperature resistant mold spring.

[0028] 0028-like Figure 1 , Figure 5 As shown, the clamping mechanism 230 is located directly above the feed inlet of the heating device 300. Multiple sets (at least two sets installed opposite each other) of circumferentially arranged telescopic rollers 232 clamp the base material 500, preventing it from falling freely and causing insufficient heating time and poor softening. If necessary, multiple rows of circumferentially arranged telescopic rollers 232 can be arranged axially along the base material 500 to enhance the clamping reliability. The telescopic rollers 232 are preferably spring-loaded rollers. The guide plate 231 is located above the telescopic rollers 232. The guide plate 231 has a central opening with a diameter slightly larger than the base material 500, and a flange below the central opening to guide the base material 500 into the heating device 300. The pushing mechanism 220, under the action of the downward pushing force component 210, feeds the base material 500 into the heating device 300 at a certain rate. The protective shell 223, in conjunction with the telescopic rollers 232, prevents the base material 500 from tilting or tipping over during production.

[0029] like Figure 2 , Figure 3 As shown, the heating device 300 includes a softening furnace 310 and an auxiliary guide sleeve 320. The softening furnace 310 is typically made of stainless steel, uses ceramic fiber blankets as insulation material, and is heated by electric heating wires. The auxiliary guide sleeve 320 includes a guide sleeve 321 and a heating element 322. The inner cavity of the guide sleeve 321 is funnel-shaped, specifically having an upper cavity that mates with the base material 500, a transitional middle conical cavity, and a lower cavity that mates with the secondary forming bar stock 600. The heating element 322 is preferably a single-headed mold heating rod. The heating element 322 is inserted into multiple pre-machined circumferentially arranged mounting holes in the guide sleeve 321 to heat the guide sleeve 321, so that the base material 500 ultimately reaches the softening degree required for drawing within the guide sleeve 321.

[0030] An auxiliary guide sleeve 320 is placed inside the furnace cavity of the softening furnace 310. The feed inlet of the softening furnace 310 is the feed inlet of the heating device 300. The feed inlet of the auxiliary guide sleeve 320 is concentric with the feed inlet of the softening furnace 310. The outer diameter of the feed inlet of the auxiliary guide sleeve 320 is slightly larger than that of the base material 500. After the base material 500 enters the cavity of the auxiliary guide sleeve 320 under the guidance of the guide plate 231, the auxiliary guide sleeve 320 provides auxiliary guidance for the base material 500. The discharge port at the end of the auxiliary guide sleeve 320 is the discharge port of the heating device 300.

[0031] To ensure the end of the base material is heated and that the portion of the base material 500 enclosed by the protective shell 223 is sufficiently softened, the protective shell 223 and the protective shell resetting component 224 do not enter the heating device 300 along with the base material 500. The outer diameter of the protective shell 223 is larger than the diameter of the central hole of the guide plate 231, and the outer diameter of the lower flange of the push rod 222 is smaller than the outer diameter of the base material 500. As the base material 500 continuously enters the heating device 300, the difference between the diameter of the central hole of the guide plate 231 and the outer diameter of the protective shell 223 prevents the protective shell 223 and the protective shell resetting component 224 from entering the heating device 300, while the push rod 222 continues to push the base material 500 into the heating device 300 to achieve sufficient softening of the base material 500. When the base material 500 reaches the designated position in the heating device 300, the push rod 222 moves upward, and under the action of the protective shell resetting component 224, the protective shell 223 gradually returns to the lower flange of the push rod 222.

[0032] like Figure 1 , Figure 6 As shown, the molding device 400 includes a roller 410 and a molding sleeve 420. The roller 410 is preferably an electrically heated roller with an internal heating wire. The roller 410 provides rotational power to the molding sleeve 420 and conducts heat to the molding sleeve 420, preventing excessive temperature difference between the molding sleeve 420 and the softened secondary molding bar 600, which could affect product quality. The molding sleeve 420 is replaceable and fixed to the roller 410 by flanges on both sides. The shape and depth of the groove at the outer edge of the molding sleeve 420 are determined according to the product's shape and specifications.

Claims

1. An optical glass rod drawing device, characterized in that: The application relates to a feeding device (200), a first rack (110), a heating device (300), a second rack (120) and a shaping device (400); wherein the feeding device (200) comprises a lower pushing power component (210), a pushing mechanism (220) and a clamping mechanism (230) and is located above the heating device (300) and is used for feeding a base material (500) into the heating device (300) completely; the lower pushing power component (210) is arranged on the first rack (110), the pushing mechanism (220) is located below the first rack (110) and is connected with the lower pushing power component (210), and the clamping mechanism (230) is located below the pushing mechanism (220); the clamping mechanism (230) is composed of a guide disc (231) and a telescopic roller (232), the guide disc (231) is located above the telescopic roller (232); the heating device (300) is used for softening the base material (500); the shaping device (400) comprises a roller (410) and a shaping sleeve (420) and is located below the heating device (300), the roller (410) is a matched roller, the shaping sleeve (420) is sleeved on the roller (410), the shaping device (400) is used for drawing the softened base material (500) and correcting the shape and shape tolerance to form a secondary formed bar (600); the pushing mechanism (220) is composed of a connecting plate (221), a pushing rod (222), a protective shell (223) and a protective shell resetting component (224); wherein the protective shell resetting component (224) is connected between the connecting plate (221) and the protective shell (223), the connecting plate (221) is fixedly connected to the lower pushing moving rod end of the lower pushing power component (210); the upper end of the pushing rod (222) is fixedly connected to the connecting plate (221), the lower end of the pushing rod (222) penetrates through the protective shell (223) and is provided with a flange; the outer diameter of the protective shell (223) is larger than the hole diameter of the center hole of the guide disc (231), the outer diameter of the flange of the lower end of the pushing rod (222) is smaller than the outer diameter of the base material (500), and the guide disc (231) can block the protective shell (223) and the protective shell resetting component (224) from entering the heating device (300).

2. The optical glass rod drawing apparatus according to claim 1, wherein: The heating device (300) comprises a softening furnace (310) and an auxiliary guide sleeve (320).

3. An optical glass rod drawing apparatus according to claim 2, wherein: The softening furnace (310) is arranged on the second rack (120), the auxiliary guide sleeve (320) is arranged in the softening furnace (310), and the roller (410) and the shaping sleeve (420) are located below the second rack (120).

4. The optical glass rod drawing apparatus according to claim 3, wherein: The guide disc (231) is located above and is provided with a through hole matched with the base material (500), the through hole is provided with a flange below and can guide the base material (500); the telescopic roller (232) comprises one or more groups of telescopic rollers arranged oppositely, the telescopic roller is a spring pressing wheel, and the telescopic roller clamps the base material (500) to avoid falling by itself.

5. An optical glass rod drawing apparatus according to claim 4, wherein: The auxiliary guide sleeve (320) comprises a guide sleeve (321) and a heating element (322); the inner cavity of the guide sleeve (321) is funnel-shaped, and specifically comprises an upper cavity matched with the parent material (500), a transition middle cavity and a lower cavity matched with the secondary formed bar (600); a plurality of mounting holes are arranged in the side wall along the outer periphery of the cavity; and the heating element (322) is mounted in the mounting hole to heat the guide sleeve (321).

6. A device for drawing an optical glass rod according to any one of claims 1 to 5, characterized in that: The plastic shaping sleeve (420) is provided with a groove at the outer edge, the shape and depth of the groove are determined according to the shape and specification of the product, and the plastic shaping sleeve (420) is replaced when the product is different; and the roller (410) is an electric heating roller containing heating wires in the inside, and provides rotating power and heating for the plastic shaping sleeve (420).

7. A device for drawing an optical glass rod according to any one of claims 2 to 5, characterized in that: The feeding port of the auxiliary guide sleeve (320) is concentric with the feeding port of the softening furnace (310), and the discharging port is the discharging port of the heating device (300).

8. A device for drawing an optical glass rod according to any one of claims 1 to 5, characterized in that: The pushing mechanism (220) vertically pushes the parent material (500) into the heating device (300) at a certain speed under the action of the lower pushing force component (210); in order to ensure that the end of the parent material (500) is heated, the protective shell (223) and the protective shell resetting component (224) do not enter the heating device (300) with the parent material (500).

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