阅读说明：本技术 一种石英玻璃棒火焰抛光和退火的装置及其方法 (Quartz glass rod flame polishing and annealing device and method thereof ) 是由 花宁 王友军 李怀阳 隋镁深 孔敏 蔡广勇 秦建鸿 丛吉国 余振华 于 2020-07-27 设计创作，主要内容包括：本发明涉及一种石英玻璃棒火焰的抛光和退火方法,其特征在于,包括如下步骤：S1移动端上料：首先将石英玻璃棒进行装夹并匀速转动；S2预热：打开主燃烧器并且控制所需的温度,并控制火焰操作台横向往复运行,对石英玻璃棒进行预热；S3抛光以及退火：预先调节好副火焰喷头的高度、角度以及副加热区的氢气、氧气供应量,并且打开各个副火焰喷头,此时,调节位移速度控制器,使火焰操作台带动固定在焰枪架上的火焰喷枪匀速对石英玻璃棒进行加热抛光,与此同时,副燃烧器之间的距离和每个燃烧器的氢气、氧气量控制温度,形成温度梯度,可使石英玻璃棒缓慢降温,达到退火的效果。本发明的有益效果是生产质量好和生产效率高。(The invention relates to a quartz glass rod flame polishing and annealing method, which is characterized by comprising the following steps of: s1 moving end feeding: firstly, clamping a quartz glass rod and rotating the quartz glass rod at a constant speed; s2 preheating: opening a main burner, controlling the required temperature, controlling a flame operation table to transversely reciprocate, and preheating the quartz glass rod; s3 polishing and annealing: the height and angle of the auxiliary flame spray heads and the hydrogen and oxygen supply amount of the auxiliary heating area are adjusted in advance, each auxiliary flame spray head is opened, at the moment, the displacement speed controller is adjusted, the flame operating platform drives the flame spray gun fixed on the flame gun rack to heat and polish the quartz glass rod at a constant speed, meanwhile, the distance between the auxiliary burners and the hydrogen and oxygen amount of each burner control the temperature to form a temperature gradient, the quartz glass rod can be slowly cooled, and the annealing effect is achieved. The invention has the advantages of good production quality and high production efficiency.)

1. A flame polishing and annealing device for a quartz glass rod comprises a bed body with a rack slideway, a fixed bed head arranged at one end of the bed body and a movable bed head transversely connected with the rack slideway in a sliding manner; be provided with the flame operation platform who slides the setting with the rack slide on the lathe bed between fixed head of a bed and the removal head of a bed, fixed head of a bed and the overhead left part chuck and the right part chuck that all faces flame operation platform that are provided with respectively of removal bed, its characterized in that: the flame operation table is provided with a main burner and a plurality of auxiliary burners arranged at equal intervals, the main burner and the auxiliary burners are positioned on the same horizontal line, and the combustion temperature is uniformly reduced from the main burner to one side of the auxiliary burners to form a temperature gradient; and temperature measuring devices for detecting the local temperature of the quartz glass rod are arranged on the main burner and the auxiliary burner.

2. The apparatus for flame polishing and annealing a quartz glass rod according to claim 1, wherein: the main burner comprises a flame gun rack arranged at the bottom and/or two sides of a processed workpiece and a flame spray gun arranged on the flame gun rack.

3. The apparatus for flame polishing and annealing a quartz glass rod according to claim 2, wherein: the auxiliary burner comprises an auxiliary flame gun rack and an auxiliary flame nozzle, wherein the auxiliary flame gun rack is arranged at the bottom and/or two sides of a processed workpiece; the auxiliary flame spray head and the auxiliary flame gun rack can be longitudinally displaced.

4. The apparatus for flame polishing and annealing a quartz glass rod according to claim 3, wherein: the temperature measuring device is an infrared temperature measuring probe with an output end facing the workpiece to be processed.

5. The apparatus according to claim 4, wherein: the flame operation table and the moving bed head are both fixedly provided with motors; the output end of the motor is provided with a gear meshed and connected with the rack slideway.

6. The apparatus for flame polishing and annealing a quartz glass rod according to claim 5, wherein: the fixed bed head is provided with a servo motor for controlling the moving bed head and the flame operating platform to move on the rack rail, and a displacement speed controller for controlling the moving speed of the moving bed head and the flame operating platform is arranged above the servo motor.

7. The apparatus for flame polishing and annealing a quartz glass rod according to claim 6, wherein: the left chuck and the right chuck are rotatably arranged on the corresponding fixed bed head and the corresponding moving bed head through drivers respectively.

8. A quartz glass rod flame polishing and annealing method is characterized by comprising the following steps:

s1 moving end feeding: firstly, clamping a quartz glass rod on a right chuck of a movable bed head; starting a driver to drive the right chuck to rotate at a constant speed;

s2 preheating: opening a main burner, controlling the supply flow, direction and angle of an external hydrogen and oxygen supply device, opening a servo motor, adjusting a displacement speed controller, controlling a flame operation table to transversely reciprocate, and preheating a quartz glass rod;

s3 polishing and annealing: moving the flame to the middle part of the quartz glass rod, adjusting the height and angle of the auxiliary flame spray heads and the supply of hydrogen and oxygen in the auxiliary heating area in advance, and opening each auxiliary flame spray head, adjusting the displacement speed controller at the moment to enable the flame operation table to drive the flame spray gun fixed on the flame gun frame to heat and polish the quartz glass rod at a constant speed, and meanwhile, controlling the temperature by the distance between the auxiliary burners and the amount of hydrogen and oxygen of each burner to form a temperature gradient, so that the quartz glass rod can be slowly cooled to achieve the annealing effect;

s4 fixed end feeding: after one end is polished, the movable bed head is driven to be close to the fixed bed head until the glass rod enters a left chuck clamping area on the fixed bed head, and then the glass rod is clamped by a left chuck; then repeating the processing steps of S2 and S3 to realize complete processing;

s5 discharging: and finally, stopping the fire and stopping the machine until the glass rod is cooled, and taking down the glass rod for packaging.

Technical Field

The invention relates to the technical field of glass hot processing, in particular to a quartz glass rod flame polishing and annealing device and a method thereof.

Background

Silica glass rods are widely used in the optical fiber manufacturing industry as connecting rods, leading rods, holding rods for VAD processes, etc. required in the optical fiber manufacturing process, and such products generally require the silica glass rods to have good surface finish and transparency. In the previous dimension and shape processing link of the quartz glass rod, turning and grinding cannot meet the requirements, and the polishing of cylindrical products with complex structures is difficult to realize by common polishing methods (cold working grinding and polishing). At present, a flame polishing technology is generally adopted, namely oxyhydrogen flame is utilized to heat the surface of a processed workpiece after fine processing to a melting temperature, and mass points on the surface of glass move along with the action of surface tension, so that a transparent and smooth polished surface is formed on the surface of quartz glass; as shown in the patent application No. 201620024895.7 filed on 2016, 01, 12, and entitled automatic flame polishing device for quartz glass rods.

After long-term use and experiments, the quartz glass rod produced by the existing processing equipment and the matched processing technology has the following problems:

after the flame polishing in the traditional process, the quartz rod is placed in an annealing furnace for annealing at the temperature of 1000-1100 ℃ for more than 2 hours, the thin or long quartz rod can be bent, and the bending degree exceeds the standard and is unqualified; in addition, the annealing mode needs to increase the heating time of the quartz glass rod, and has low production efficiency and high production cost.

Therefore, the application provides a novel quartz glass flame polishing and annealing device and a matching process of the device, and aims to solve the problems that the traditional polishing device cannot be directly annealed and is low in production efficiency.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a quartz glass rod flame polishing and annealing device and a method thereof.

The technical scheme of the invention is realized as follows: a flame polishing and annealing device for a quartz glass rod comprises a bed body with a rack slideway, a fixed bed head arranged at one end of the bed body and a movable bed head transversely connected with the rack slideway in a sliding manner; be provided with the flame operation platform who slides the setting with the rack slide on the lathe bed between fixed head of a bed and the removal head of a bed, fixed head of a bed and the overhead left part chuck and the right part chuck that all faces flame operation platform that are provided with respectively of removal bed, its characterized in that: the flame operation table is provided with a main burner and a plurality of auxiliary burners arranged at equal intervals, the main burner and the auxiliary burners are positioned on the same horizontal line, and the combustion temperature is uniformly reduced from the main burner to one side of the auxiliary burners to form a temperature gradient; and temperature measuring devices for detecting the local temperature of the quartz glass rod are arranged on the main burner and the auxiliary burner.

Preferably: the main burner comprises a flame gun rack arranged at the bottom and/or two sides of a processed workpiece and a flame spray gun arranged on the flame gun rack.

Preferably: the auxiliary burner comprises an auxiliary flame gun rack and an auxiliary flame nozzle, wherein the auxiliary flame gun rack is arranged at the bottom and/or two sides of a processed workpiece; the auxiliary flame spray head and the auxiliary flame gun rack can be longitudinally displaced.

Preferably: the temperature measuring device is an infrared temperature measuring probe with an output end facing the workpiece to be processed.

Preferably: the flame operation table and the moving bed head are both fixedly provided with motors; the output end of the motor is provided with a gear meshed and connected with the rack slideway.

Preferably: the fixed bed head is provided with a servo motor for controlling the moving bed head and the flame operating platform to move on the rack rail, and a displacement speed controller for controlling the moving speed of the moving bed head and the flame operating platform is arranged above the servo motor.

Preferably: the left chuck and the right chuck are rotatably arranged on the corresponding fixed bed head and the corresponding moving bed head through drivers respectively.

Compared with the prior art, the invention has the following beneficial effects:

1. the auxiliary burners arranged at equal intervals are additionally arranged on the flame operation table, so that the longitudinal height of each burner is uniformly decreased, the hydrogen and oxygen amount of each burner is accurately controlled to control the temperature, the combustion temperature is uniformly reduced from the main burner to one side of the auxiliary burner to form a temperature gradient, the quartz glass rod can be slowly cooled, and the annealing effect is achieved; compared with the traditional mode that the quartz glass rod is shut down after finishing light, the infrared temperature measuring probe detects the temperature of the surface of the quartz glass rod, and the quartz glass rod is placed into the annealing furnace for annealing after being naturally cooled to the temperature capable of annealing, so that the quartz glass rod can be prevented from being placed into the annealing furnace for annealing for more than 2 hours at the temperature of 1000 plus materials of 1100 ℃, and the slender and softened quartz rod can be bent under the action of high temperature, and the phenomenon of unqualified quartz rod is avoided.

In addition, the mode saves the waiting time for cooling and cooling, can improve the production efficiency and saves the production cost.

2. Can carry out longitudinal displacement between vice flame shower nozzle and the vice flame gun rack to set up the screw hole in the side of vice flame gun rack, be provided with the nut in the screw hole, and extrude making it and the vice flame gun rack between produce frictional force through this nut and fix a position, the simple high efficiency of professional mode, and because the quality of flame gun is lighter, therefore such clamping mode is enough stable.

In addition, the auxiliary flame spray head can also move longitudinally relative to the auxiliary flame gun rack in a lead screw driving mode; the device comprises a connecting frame, a screw rod, a nut seat, a screw rod driving motor and a screw rod driving motor, wherein the connecting frame is arranged below an auxiliary flame spray head, a rotating screw rod is arranged below the auxiliary flame spray head through the screw rod frame, the nut seat is fixedly connected with the connecting frame is arranged on the screw rod, the nut seat is in threaded connection with the screw rod, the screw rod seat is clamped on the screw rod frame and is in sliding connection with the screw rod frame, and the screw rod is driven to rotate.

In addition, the invention also discloses a polishing and annealing method of quartz glass rod flame, which is characterized by comprising the following steps:

s1 moving end feeding: firstly, clamping a quartz glass rod on a right chuck of a movable bed head; starting a driver to drive the right chuck to rotate at a constant speed;

s2 preheating: opening a main burner, controlling the supply flow, direction and angle of an external hydrogen and oxygen supply device, opening a servo motor, adjusting a displacement speed controller, controlling a flame operation table to transversely reciprocate, and preheating a quartz glass rod;

s3 polishing and annealing: moving the flame to the middle part of the quartz glass rod, adjusting the height and angle of the auxiliary flame spray heads and the supply of hydrogen and oxygen in the auxiliary heating area in advance, and opening each auxiliary flame spray head, at the moment, adjusting the displacement speed controller to enable the flame operation table to drive the flame spray gun fixed on the flame gun frame to heat and polish the quartz glass rod at a constant speed, meanwhile, controlling the temperature by the distance between the auxiliary burners and the amount of hydrogen and oxygen of each burner to form a temperature gradient, so that the quartz glass rod can be slowly cooled, and the annealing effect is achieved.

S4 fixed end feeding: after one end is polished, the movable bed head is driven to be close to the fixed bed head until the glass rod enters a left chuck clamping area on the fixed bed head, and then the glass rod is clamped by a left chuck; and then repeating the processing steps of S2 and S3 to realize complete processing.

S5 discharging: and finally, stopping the fire and stopping the machine until the glass rod is cooled, and taking down the glass rod for packaging.

Compared with the prior art, the invention has the following beneficial effects:

1. the quartz glass rod is annealed by flame with the gradient formed by the temperature reduction in sequence during polishing, so that the cooling and waiting time is not required compared with the traditional process, the production efficiency can be improved, and the production cost can be saved;

in the process, the quartz glass rod is annealed at a slowly reduced temperature just after being softened and polished, so that the quartz glass rod can be slowly cooled to achieve the annealing effect; compared with the traditional mode that the quartz glass rod is shut down after finishing light, the infrared temperature measuring probe detects the temperature of the surface of the quartz glass rod, and the quartz glass rod is placed into the annealing furnace for annealing after being naturally cooled to the temperature capable of annealing, so that the quartz glass rod can be prevented from being placed into the annealing furnace for annealing for more than 2 hours at the temperature of 1000 plus materials of 1100 ℃, and the slender and softened quartz rod can be bent under the action of high temperature, and the phenomenon of unqualified quartz rod is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the screw driving device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.