阅读说明：本技术 玻璃管缩口内翻法兰及其制作方法和设备 (Glass tube necking inward-turning flange and manufacturing method and equipment thereof ) 是由 江伦 江希年 于 2021-07-26 设计创作，主要内容包括：一种玻璃管缩口内翻法兰及其制作方法和设备,其制作方法首先将两倍于玻璃管法兰长度玻璃管中部加热软化,并通过成型模具逐渐成型出渐缩口,并成型出两个内翻平法兰,同时切断分离其为两个玻璃管法兰。制作设备包括成型模具、滚筒和加热火头。本发明的优点是：带有缩口内翻法兰的玻璃管缩小了相应的可伐端盖的直径,节省了可伐材料；制作方法能够一次加工两个工件,提高了生产效率；制作设备结构简单,容易实施。(A glass tube necking-in flange and a manufacturing method and equipment thereof are disclosed, wherein the manufacturing method comprises the steps of heating and softening the middle part of a glass tube with the length twice that of a glass tube flange, gradually forming a necking-in through a forming die, forming two inward-turned flat flanges, and cutting and separating the inward-turned flanges into two glass tube flanges. The manufacturing equipment comprises a forming die, a roller and a heating fire head. The invention has the advantages that: the glass tube with the necking inward-turning flange reduces the diameter of the corresponding kovar end cover, and saves kovar materials; the manufacturing method can process two workpieces at one time, and improves the production efficiency; the manufacturing equipment has simple structure and is easy to implement.)

1. A glass tube necking inward-turning flange is characterized in that a glass tube (201) is provided with a necking opening (203), an inward-turning flat flange (202) is formed at the top end of the necking opening (203), and the inner plane and the outer plane of the flange are required to be parallel and flat.

2. The glass tube reducing flange according to claim 1, wherein the inner diameter of the flange (202) is at least 12 mm; the thickness of the inner flat flange (202) is 6-8mm, and the width of the radial plane is 7-10 mm.

3. A method of manufacturing a glass tube necking-in flange according to claim 1, comprising a molding step of: heating and softening a long glass tube with the length 2 times that of the glass tube (201) in the middle of the long glass tube, applying a set of forming die to form two glass tube necking inward-turning flanges, wherein the inward-turning flanges (202) of the two glass tube necking inward-turning flanges are opposite, and simultaneously cutting and separating the opposite ends of the two inward-turning flanges (202).

4. A method for manufacturing a glass tube necking-in flange according to claim 3, wherein a preheating step is provided before the forming step, for preheating the middle part of the long glass tube; an annealing step is arranged after the forming step; the annealing step is carried out in a two-line synchronous manner for the two separated glass flanges.

5. An apparatus for implementing the method for manufacturing the glass tube necking-in flange according to claim 3, characterized by comprising a forming station B, wherein the forming station B comprises a forming die, a roller (302) and a heating fire head (303), the forming die comprises a male die (305) and a female die (304), the female die (304) is slowly pushed from two ends of the glass tube to the middle of the glass tube, the male die (305) is translated from top to bottom through a lifting rod (3051), and the forming steps of the two glass tube necking-in flanges of the glass tube are completed at one time; each section of glass tube (201) rotates between two rollers (302), and the shaft of each roller (302) is rotatably supported on the frame (401); a heating flame (303) is provided below the molding die.

6. The apparatus according to claim 5, characterized in that a preheating station A is arranged before the forming station B, and at least one annealing station C is arranged after the forming station B; a driving roller (3021, 3022) is respectively arranged in front of the preheating station A and behind the last annealing station C, a driven roller (302) is respectively arranged between each two adjacent stations, and a heating fire head (303) is respectively arranged at each station; shafts of driven rollers (302) of the preheating station A, the forming station B and the annealing station C are in transmission connection with driving rollers (3021, 3022) through a synchronous transmission mechanism, and the shafts of the driving rollers (3021, 3022) are driven by a power device; a shifting device for pushing the glass tube to the next station is arranged below each station.

7. The apparatus of claim 6, wherein the displacement means comprises a tilt elevation plate (408) having a width 3/4 between two adjacent rollers, a roller (302) biased to one side in the forward direction, a forward tilt plane and a horizontal tilt angle greater than 10 °, the tilt elevation plate (408) being moved up and down by a pneumatic cylinder or an electric push rod (409).

8. The apparatus according to claim 5, wherein the forming mold is made of graphite material, and the forming mold is only partially eccentrically contacted with the upper part of the glass tube (201) during forming.

Technical Field

The invention relates to a glass tube necking inward-turning flange and a manufacturing method and manufacturing equipment thereof, which are used for manufacturing an outer cover glass tube of a metal glass vacuum heat collecting tube.

Background

The existing metal glass vacuum heat collecting tube is composed of a metal heat absorbing body and an outer cover glass tube, wherein the metal heat absorbing body and one end of the glass tube are sealed by a Kovar metal end cover and a flange at the end of the glass tube through a hot press sealing process, and a flat flange 102 is required to be manufactured at the end of the glass tube 101 shown in figure 1. The glass flange 102 can be a glass tube upturning, the specific manufacturing process is that one end of the glass tube 101 is clamped on a glass lathe, the other end of the glass tube is heated by flame, a U-shaped female die is inserted into the glass tube, a male die is used for pressing and forming the glass tube, the U-shaped female die is moved downwards to be withdrawn from an inner hole of the flange after being withdrawn from the glass tube, so the diameter of the inner hole of the glass flange cannot be too small, namely the glass flange cannot be small, only the upturning flange with the same diameter of the glass tube can be manufactured, the corresponding kovar end cover is larger and is the same as the outer diameter of the glass tube, and the process is low in single-piece manufacturing efficiency, so that a small flange is necessary to be invented, and an efficient production method can be realized.

Disclosure of Invention

The invention discloses a glass tube necking inward-turning flange and a manufacturing method and manufacturing equipment thereof, and aims to solve the problems in the prior art.

The technical scheme of the invention is as follows: a glass tube necking inward flange is characterized in that a gradually necking is formed gradually through a forming die, and an inward flange is formed at the top end of the gradually necking.

The manufacturing method of the glass tube necking inward flange is characterized by comprising the following molding steps: heating and softening a long glass tube with the length 2 times that of the glass tube, applying a set of forming die to form two inwards-turned flanges with the reduced mouths of the glass tube, wherein the inwards-turned flat flanges (202) of the two inwards-turned flanges with the reduced mouths of the glass tube are opposite, and simultaneously cutting and separating the opposite ends of the two inwards-turned flat flanges (202).

The equipment for implementing the manufacturing method of the glass tube necking inward-turning flange is characterized by comprising a forming station B, wherein the forming station B comprises a forming die, a roller and a heating fire head, the forming die comprises a male die and a female die, the female die is slowly pushed from two ends of a glass tube to the middle of the glass tube, the male die is horizontally moved from top to bottom through a lifting rod, and the forming step of the necking inward-turning flange of the two glass tubes of the glass tube is finished at one time; each section of glass tube rotates between two rollers, and the shafts of the rollers are rotatably supported on the rack; a heating fire head is arranged below the forming die.

The invention has the advantages that: the glass tube with the necking inward-turning flange reduces the diameter of the corresponding kovar end cover, and saves kovar materials; the manufacturing method can process two workpieces at one time, and improves the production efficiency; the manufacturing equipment has simple structure and is easy to implement.

Drawings

FIG. 1 is an axial cross-sectional view of a prior art inverted flange in a non-necked glass tube;

FIG. 2 is an axial cross-sectional view of an inverted flange in a glass tube according to the present invention;

FIG. 3 is a schematic top view of the production apparatus of the present invention;

FIG. 4 is a schematic sectional view A-A of FIG. 3;

FIG. 5 is a schematic cross-sectional view B-B of FIG. 4;

FIG. 6 is an enlarged view of a portion of the mold of FIG. 5;

fig. 7 is a schematic cross-sectional view of C-C of fig. 6.

Detailed Description

Referring to fig. 2, in the invention, one end of a glass tube 201 is reduced in diameter by a tapered mouth 203, and then an inner flat flange 202 is manufactured at the tapered mouth, wherein the inner diameter of the inner flat flange 202 can be as small as 12 mm. The thickness of the inward-flanging flange 202 is 6-8mm and the planar (radial) width is 7-10mm according to the requirements of a hot-press sealing process.

The basic equipment for manufacturing the necking inward-turning flange of the glass tube comprises a forming die, a roller 302 and a heating fire head 303, wherein the forming die comprises a female die 304 and a male die 305, the middle of the female die 304 is divided into two parts, the two parts are respectively pushed to the middle of the glass tube by a push rod 3041 from the open ends of the two ends of the glass tube, which are 2 times of the length of the 201 glass tube, the male die 305 is translated from top to bottom by a lifting rod 3051, the two glass flanges are formed at one time and are cut off and separated; each section of glass tube 201 rotates between two rollers 302, and the shafts of the rollers 302 are rotatably supported on a frame 401; a heating fire head 303 is arranged below the two glass tube flanges; the rollers 302 of the two annealing lines are separated, and a space is reserved between the rollers for the heating fire head 303 to heat the glass tube.

Referring to fig. 3-5, the complete set of manufacturing equipment for the glass tube necking-in flange of the invention comprises 5 stations, namely a preheating station a, a forming station B and at least one annealing station C from the front end to the rear end; the forming station B is provided with a set of forming die, two groups of rollers 302 and a heating fire head 303, the shafts of the rollers 302 of the preheating station A, the forming station B and the annealing station C are in transmission connection with each other through a synchronous transmission mechanism, wherein the shafts of the driving rollers 3021 and 3022 are driven by a power device; a shifting device for pushing the glass tube to the next station is arranged below each station.

The manufacturing method of the necking inward flange of the glass tube (refer to figures 3-7) of the invention comprises the following steps: from left to right are a preheating station a, a forming station B and three annealing stations C, D, E. The forming station B is provided with a forming die which is made of graphite material and is only contacted with the eccentric part of the upper part of the glass tube 201. The forming mold is composed of a female mold 304 and a male mold 305, the middle of the female mold 304 is divided into two parts, the two parts are respectively pushed to the middle part of the glass tube by a push rod 3041 from the two opening ends of the glass tube, the male mold 305 is translated from top to bottom through a lifting rod 3051, the forming mold does not rotate, the glass softening material is extruded into the female mold 304, meanwhile, the two female molds 304 are closed slowly, the male mold 305 is pressed down to the right position, and after forming is completed, all molds are separated from the glass tube 201 in a resetting mode. The two formed glass tube flanges 202 are conveyed to the three annealing stations C, D, E on the right by the conveying mechanism, and annealing is completed by heating of the three annealing stations, so that the manufacturing process of the glass tube necking-in flange is completed, and continuous production is realized.

The displacement device comprises a lift swash plate 408 and an air cylinder or electric push rod 409. A lifting inclined plate 408 is arranged between every two adjacent rollers 302, the width of the lifting inclined plate 408 is about 3/4 of the distance between every two adjacent rollers 302, the rollers are inclined to one side in the advancing direction, the inclined angle of a forward inclined plane and the horizontal plane is larger than 10 degrees, the lifting inclined plate 408 is pushed by a cylinder or an electric push rod 409 to move up and down, the glass tube 201 is lifted when the glass tube moves up, and meanwhile, the glass tube rolls and slides down on the lifting inclined plate 408 until the glass tube is right above the rollers in the advancing direction and slides into the other side of the rollers along the same trend, so that the glass tube is displaced once, and then the lifting inclined plate 408 is reset downwards. All the lifting inclined plates 408 act in the following sequence, the lifting inclined plate 408 corresponding to the glass tube of the last annealing station E moves upwards to push out the glass tube and then moves downwards, and the lifting inclined plate 408 corresponding to the next glass tube moves upwards to push out the glass tube to the vacant site reserved by the glass tube, so that the continuous operation is realized.