Device and method for accurately regulating and controlling forming outer diameter of borosilicate glass tube

Abstract

The invention relates to the technical field of glass tube machining, in particular to a borosilicate glass tube forming outer diameter precise regulation and control device and a regulation and control method thereof.The borosilicate glass tube forming outer diameter precise regulation and control device comprises a polishing machine body, a polishing assembly, a gas collection assembly and a heat energy conversion assembly, and a supporting piece is arranged on an output shaft of the polishing machine body; a first grinding piece is arranged on one side of the workbench, a second grinding piece is arranged on the other side of the workbench, the gas collection assembly comprises an exhaust groove and a gas suction groove, and the heat energy conversion assembly comprises a heat transfer piece. According to the device, heat of the borosilicate glass tube can be absorbed through the heat energy conversion assembly, so that the first grinding piece and the second grinding piece grind the borosilicate glass tube after the glass tube is cooled to a certain temperature, and the problems that the wall thickness distribution is uneven and the outer wall is not smooth in the standing and cooling process of the borosilicate glass tube are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass tube processing, and in particular to a device for precisely controlling the outer diameter of a borosilicate glass tube and a control method thereof. Background Art

[0002] Glassy substances have the property of gradually softening when heated and hardening again when cooled. Therefore, when processing glass tubes, the glass tubes are heated to soften them and then bent, stretched, and thinned to form various shapes as needed. High borosilicate glass is resistant to high temperatures and sudden temperature changes. The high borosilicate glass cups made from it are more heat-resistant and stable than ordinary glass cups, and the high borosilicate glass tubes still have a certain physical stability at a certain high temperature.

[0003] The borosilicate glass tube has relatively stable physical properties after hot forming, so it generally needs to be left to cool and form after heat forming. However, during the static forming process, although the borosilicate glass tube has certain stable physical properties at high temperatures and is not easy to deform, due to the thermal expansion and contraction of the borosilicate glass tube and the lack of support for the inner wall, during the long cooling process, the borosilicate material on the inner and outer walls of the borosilicate glass tube will move in a small range, resulting in uneven wall thickness of the borosilicate glass tube and even deformation of the borosilicate glass tube, resulting in the inner diameter and outer diameter of the borosilicate glass tube after static cooling not meeting the design requirements.

[0004] Although borosilicate glass tubes have a certain physical stability at high temperatures, they still have the problem of uneven material distribution when they are stationary. However, in actual operation, due to the influence of various factors, the wall thickness of the borosilicate glass tube cannot be guaranteed to be highly consistent by the effect of centrifugal force alone, which makes the wall thickness of the borosilicate glass tube have certain defects, resulting in the outer wall of the glass tube not being smooth enough. As a result, in actual use, the uneven wall thickness will cause related use problems such as a decrease in mechanical properties, making the glass tube easy to be damaged, which has a certain impact on the observation of changes in the glass tube. Summary of the invention

[0005] The purpose of the present invention is to provide a device for accurately controlling the outer diameter of a borosilicate glass tube and a control method thereof, so as to solve the problems of uneven wall thickness distribution and rough outer wall of the borosilicate glass tube during static cooling.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A device for accurately controlling the outer diameter of a borosilicate glass tube, comprising a polishing machine body, a support member being arranged on an output shaft of the polishing machine body, and further comprising: A grinding assembly, the grinding assembly comprising a workbench arranged on one side of the polishing machine body, the end of the workbench close to the output shaft of the polishing machine body being provided with a first grinding piece and a second grinding piece capable of relative movement, for grinding the outer wall of the glass tube; A gas collecting assembly, the gas collecting assembly comprising a plurality of exhaust grooves opened on the first polishing member and opening toward the support member, and a plurality of air suction grooves opened toward the support member on the second polishing member, for dissipating heat and collecting heat from the glass tube; A heat energy conversion component includes a heat transfer component fixedly arranged inside the workbench, which is used to convert the heat energy absorbed by the gas collecting component into mechanical energy for moving the first polishing component and the second polishing component.

[0007] Preferably, the first polishing member and the second polishing member are both slidably connected to the workbench via a sliding member, a transmission member is provided at one end of the first polishing member close to the second polishing member, the other end of the transmission member passes through the workbench and is fixedly connected to one end of the second polishing member away from the first polishing member, and a first elastic member is provided between the first polishing member and the workbench.

[0008] Preferably, the gas collecting assembly also includes a cylinder arranged on the workbench close to the side of the polishing machine body, a piston is slidably provided in the cylinder, a cam is fixedly provided on the output shaft of the polishing machine body, a guide groove is opened at one end of the cam away from the polishing machine body, and the piston is inserted into the guide groove and can slide in the guide groove.

[0009] Preferably, one end of the cylinder away from the output shaft of the polishing machine body is connected to the multiple exhaust grooves through an exhaust pipe, and one end of the cylinder close to the output shaft of the polishing machine body is connected to the multiple intake grooves through an intake pipe, and one end of the cylinder away from the output shaft of the polishing machine body is provided with a first one-way valve opening toward the inside of the cylinder.

[0010] Preferably, the thermal energy conversion component also includes a plurality of heat absorbing parts fixedly arranged in the intake pipe, the plurality of heat absorbing parts are connected by heat conducting parts, a heat conducting plate is fixedly arranged between the heat conducting parts and the heat transfer parts, and the inner wall of the second polishing part, the intake pipe, the heat transfer parts and the outer surfaces of the heat conducting plate are all wrapped with a thermal insulation layer.

[0011] Preferably, a moving part is slidably provided inside the workbench, a telescopic bag is fixedly provided between the moving part and the heat transfer part, and the telescopic bag is filled with thermal expansion gas.

[0012] Preferably, a second elastic member located in the telescopic bag is provided between the heat transfer member and the opposite end of the moving member.

[0013] Preferably, a pushing groove is provided at one end of the sliding member corresponding to the second polishing member and in contact with the workbench, a pushing member that can be inserted into the pushing groove is slidably provided in the movable member, and a third elastic member is provided between the end of the pushing member away from the suction pipe and the movable member.

[0014] Preferably, a heat-insulating cover is provided on the workbench, the opposite ends of the first polishing piece and the second polishing piece are located in the heat-insulating cover, the end of the heat-insulating cover away from the output shaft of the polishing machine body can be opened, the first polishing piece and the second polishing piece are both provided with air outlet grooves, the air exhaust groove and the air intake groove are both connected with the corresponding air outlet grooves, the first polishing piece and the second polishing piece are both slidably provided with movable columns capable of covering the corresponding air outlet grooves, and a fourth elastic member is provided between the first polishing piece and the second polishing piece and the corresponding movable columns.

[0015] A method for accurately controlling the outer diameter of a borosilicate glass tube, comprising the following steps: S1. Place the borosilicate glass tube on the support, start the polishing machine body, and rotate the borosilicate glass tube; S2. Blowing air into the borosilicate glass tube and absorbing the hot air through the exhaust groove and the suction groove; S3. The first polishing member and the second polishing member move toward the borosilicate glass tube and polish; S4. After polishing is completed, open the heat preservation cover and take out the borosilicate glass tube.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the provided polishing machine body and the detachable supports of different diameters, the borosilicate glass tube can be supported according to the sizes of the borosilicate glass tubes with different inner diameters to prevent the inner diameter of the borosilicate glass tube from changing under the condition of thermal expansion and contraction, thereby ensuring the accuracy of the inner diameter processing. At the same time, the support drives the borosilicate glass tube to rotate continuously, which can make the high-temperature borosilicate glass tube material more evenly distributed on the outer wall of the borosilicate glass tube, thereby making the wall thickness of the borosilicate glass tube uniform and preventing the occurrence of errors in the processing size.

[0017] 2. Through the arrangement of the bellows and the heat-expanding gas, the heat of the glass tube can be collected and converted into the movement of the bellows and the extension of the second elastic member, so that only when the temperature of the glass tube drops to a certain level and the physical properties are stabilized, the resistance is overcome to pull the sliding member to move and the opposite ends of the two sliding members are brought into contact, so that the first polishing member and the second polishing member can polish the outer surface of the glass tube.

[0018] 3. By setting up the heat absorbing parts and other related components, after the temperature of the borosilicate glass tube drops to a certain level, the first polishing part and the second polishing part can polish the outer surface of the glass tube, ensuring that the borosilicate glass tube is polished while the physical properties are stable, thereby preventing the first polishing part and the second polishing part from squeezing and damaging the glass tube, making the outer wall thickness of the borosilicate glass tube uniform and smooth, which is conducive to observing the changes inside the borosilicate glass tube during use.

[0019] 4. The slow contraction of the thermally expanded gas inside the telescopic bag causes the pusher to push the sliding member to move more slowly, thereby making the contact between the first polishing member and the second polishing member and the glass tube gentler, thereby preventing the first polishing member and the second polishing member from colliding with the glass tube and causing the glass tube to break.

[0020] 5. By setting up the thermal insulation layer, the absorbed heat can be transferred to a large extent, so that the expansion range of the thermal expansion gas is larger, so that the effect of the thermal expansion gas on the telescopic bag is more obvious, and the extension length of the telescopic bag reaches the required extension length, ensuring the normal movement of the sliding part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the present invention without the polishing machine body.

[0024] Figure 3 The figure is a schematic diagram of the structure of the present invention without the workbench and the heat-insulating cover.

[0025] Figure 4 It is a schematic diagram of the full right-side plan structure of the present invention.

[0026] Figure 5 For the present invention Figure 4 A is an enlarged view of the middle image.

[0027] Figure 6 For the present invention Figure 4 Enlarged view of B.

[0028] Figure 7 Schematic diagram of the heat absorbing component and the heat conducting component in the present invention.

[0029] Figure 8 It is a schematic diagram of the full cross-sectional plan structure of the telescopic bag in the present invention.

[0030] Fig. 9 It is a schematic diagram of the structure of the cam and the piston in the present invention.

[0031] Fig.10 It is a schematic cross-sectional view of the cylinder in the present invention.

[0032] Fig.11 It is a schematic diagram of the parts of the heat conducting plate in the present invention.

[0033] Fig.12 It is a schematic diagram of the parts of the transmission member and the push groove in the present invention.

[0034] Fig.13 It is a schematic cross-sectional view of the support member and the output shaft in the present invention.

[0035] In the figure: 1, polishing machine body; 101, support member; 2. grinding assembly; 201. workbench; 202. first grinding piece; 203. second grinding piece; 204. sliding piece; 205. transmission piece; 206. heat preservation cover; 207. air outlet groove; 208. moving column; 209. fourth elastic piece; 3. Gas collecting assembly; 301. Exhaust groove; 302. Intake groove; 303. Cylinder; 304. Piston; 305. Cam; 306. Guide groove; 307. Exhaust pipe; 308. Intake pipe; 309. First one-way valve; 4. Heat energy conversion component; 401. Heat transfer component; 402. Heat absorption component; 403. Heat conduction component; 404. Heat conduction plate; 405. Insulation layer; 406. Moving component; 407. Telescopic bag; 408. Thermal expansion gas; 409. Second elastic component; 410. Pushing groove; 411. Pushing component; 412. Third elastic component. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. Example 1

[0037] The borosilicate glass tube has relatively stable physical properties after hot forming, so it generally needs to be left to cool and form after heat forming. However, during the static forming process, although the borosilicate glass tube has certain stable physical properties at high temperatures and is not easy to deform, due to the thermal expansion and contraction of the borosilicate glass tube and the lack of support for the inner wall, during the long cooling process, the borosilicate material on the inner and outer walls of the borosilicate glass tube will move in a small range, resulting in uneven wall thickness of the borosilicate glass tube and even deformation of the borosilicate glass tube, resulting in the inner diameter and outer diameter of the borosilicate glass tube after static cooling not meeting the design requirements.

[0038] To solve the above technical problems, please refer to Figures 1 to 13 The first embodiment of the present invention provides a device for accurately controlling the outer diameter of a borosilicate glass tube, including a polishing machine body 1 , and a support member 101 is provided on the output shaft of the polishing machine body 1 .

[0039] The polishing machine body 1 is electrically connected to an external power supply. Output shafts are provided at both output ends of the polishing machine body 1. The support member 101 is detachably connected to the output shaft on one side. The diameter of the support member 101 needs to be selected according to the inner diameter of the borosilicate glass tube. The polishing machine body 1 and the detachable connection method are prior arts and will not be described in detail here.

[0040] During specific use, the hot-formed borosilicate glass tube is sleeved on the outer wall of the support 101, and then the polishing machine body 1 is turned on, so that the polishing machine body 1 drives the support 101 to rotate through the output shaft, and the support 101 drives the borosilicate glass tube to rotate. At the same time, the support 101 is in close contact with the borosilicate glass tube to prevent the inner wall of the borosilicate glass tube from shrinking, causing the inner wall to fail to meet the corresponding design requirements.

[0041] While the support 101 drives the borosilicate glass tube to rotate, the borosilicate glass tube is in more complete contact with the outside air, so that the borosilicate glass tube can be quickly cooled down to achieve the purpose of rapid cooling. At the same time, while the support 101 drives the borosilicate glass tube to rotate, the material of the borosilicate glass tube can be more evenly distributed without cooling, thereby preventing the occurrence of uneven outer wall diameter of the borosilicate glass tube to a certain extent, and preventing the borosilicate glass tube material from moving when the borosilicate glass tube is left to cool.

[0042] By means of the polishing machine body 1 and the detachable support members 101 of different diameters, the borosilicate glass tube can be supported according to the sizes of the borosilicate glass tubes with different inner diameters to prevent the inner diameter of the borosilicate glass tube from changing due to thermal expansion and contraction, thereby ensuring the accuracy of the inner diameter processing. At the same time, the support member 101 drives the borosilicate glass tube to rotate continuously, which can make the high-temperature borosilicate glass tube material more evenly distributed on the outer wall of the borosilicate glass tube, thereby making the wall thickness of the borosilicate glass tube uniform and preventing the occurrence of errors in the processing size. Example 2

[0043] Although the above-mentioned embodiment 1 can solve the problem of uneven distribution of borosilicate glass tubes in a static state to a certain extent, in the actual operation process, due to the influence of various factors, the wall thickness of the borosilicate glass tube cannot be guaranteed to be highly consistent only by the effect of centrifugal force, so that the wall thickness of the borosilicate glass tube has certain defects, resulting in the outer wall of the glass tube is not smooth enough. As a result, in actual use, the uneven wall thickness will cause related use problems such as a decrease in mechanical properties, causing the glass tube to be easily damaged, which has a certain impact on the observation of changes in the glass tube.

[0044] On the basis of the first embodiment, in order to solve the above technical problems, referring to the accompanying drawings of the specification Figures 1 to 13It can be obtained that the adopted technical scheme includes a polishing machine body 1, a support 101 is arranged on the output shaft of the polishing machine body 1, and also includes a grinding component 2, a gas collecting component 3 and a heat energy conversion component 4. The grinding component 2 includes a workbench 201 arranged on one side of the polishing machine body 1, and the end of the workbench 201 close to the output shaft of the polishing machine body 1 is provided with a first grinding piece 202 and a second grinding piece 203 that can move relatively, which are used to grind the outer wall of the glass tube, and the gas collecting component 3 includes a plurality of exhaust grooves 301 opened on the first grinding piece 202 and opened toward the support 101, and a plurality of air suction grooves 302 opened toward the support 101 are opened on the second grinding piece 203, which are used to dissipate heat and collect heat from the glass tube, and the heat energy conversion component 4 includes a fixed device The heat transfer member 401 disposed inside the workbench 201 is used to convert the heat energy absorbed by the gas collecting component 3 into mechanical energy for moving the first polishing member 202 and the second polishing member 203. The first polishing member 202 and the second polishing member 203 are both slidably connected to the workbench 201 through a sliding member 204. The sliding member 204 is slidably connected to an end of the workbench 201 close to the output shaft. The sliding members 204 are distributed on both sides of the output shaft. A transmission member 205 is provided at one end of the first polishing member 202 close to the second polishing member 203. The other end of the transmission member 205 passes through the workbench 201 and is fixedly connected to an end of the second polishing member 203 away from the first polishing member 202. A first elastic member is provided between the first polishing member 202 and the workbench 201. The gas collecting component 3 also The invention comprises a cylinder 303 arranged on the workbench 201 near the side of the polishing machine body 1, a piston 304 is slidably arranged in the cylinder 303, a cam 305 is fixedly arranged on the output shaft of the polishing machine body 1, a guide groove 306 is provided at the end of the cam 305 away from the polishing machine body 1, the piston 304 is inserted into the guide groove 306 and can slide in the guide groove 306, the end of the cylinder 303 away from the output shaft of the polishing machine body 1 is connected with a plurality of exhaust grooves 301 through an exhaust pipe 307, the end of the cylinder 303 close to the output shaft of the polishing machine body 1 is connected with a plurality of suction grooves 302 through an intake pipe 308, the end of the cylinder 303 away from the output shaft of the polishing machine body 1 is provided with a first one-way valve 309 with an opening facing the inside of the cylinder 303, and the heat energy conversion component 4 It also includes a plurality of heat absorbing members 402 fixedly arranged in the air intake pipe 308, the plurality of heat absorbing members 402 are connected by heat conducting members 403, a heat conducting plate 404 is fixedly arranged between the heat conducting members 403 and the heat transfer member 401, a moving member 406 is slidably arranged inside the workbench 201, a telescopic bag 407 is fixedly arranged between the moving member 406 and the heat transfer member 401, the telescopic bag 407 is filled with heat expansion gas 408, a second elastic member 409 located in the telescopic bag 407 is arranged between the opposite ends of the heat transfer member 401 and the moving member 406, a pushing groove 410 is provided at one end of the sliding member 204 corresponding to the second polishing member 203 that contacts the workbench 201, a pushing member 411 that can be inserted into the pushing groove 410 is slidably arranged in the moving member 406,A third elastic member 412 is provided between the end of the push member 411 away from the air suction pipe 308 and the moving member 406. A heat preservation cover 206 is provided on the workbench 201. The opposite ends of the first polishing member 202 and the second polishing member 203 are both located in the heat preservation cover 206. The end of the heat preservation cover 206 away from the output shaft of the polishing machine body 1 can be opened. The first polishing member 202 and the second polishing member 203 are both provided with air outlet grooves 207. The two air outlet grooves 207 are centrally symmetrically distributed about the axis of the output shaft of the polishing machine body 1. The exhaust groove 301 and the air suction groove 302 are both connected to the corresponding air outlet grooves 207. The first polishing member 202 and the second polishing member 203 are both slidably provided with moving columns 208 that can cover the corresponding air outlet grooves 207. A fourth elastic member 209 is provided between the first polishing member 202 and the second polishing member 203 and the corresponding moving columns 208.

[0045] During specific use, the polishing machine body 1 drives the borosilicate glass tube to rotate through the output shaft and the support 101, and relies on centrifugal force to evenly distribute the outer wall material of the glass tube. At the same time, the output shaft rotates by driving the cam 305 to rotate, so that the guide groove 306 drives the piston 304 to move along the axial direction of the cylinder 303. When the piston 304 moves away from the output shaft, due to the provision of a first one-way valve 309, the cylinder 303 discharges the gas into the exhaust groove 301 through the exhaust pipe 307. The exhaust pipe 307 is provided with a second one-way valve with an opening facing the exhaust groove 301. Since the gas is blown toward the support 101 through the exhaust groove 301, the blown gas cools the glass tube.

[0046] At the same time, when the piston 304 moves in the direction away from the output shaft, the piston 304 inhales the hot gas that has contacted the high-temperature borosilicate glass tube through the suction pipe 308 and the suction groove 302. A third one-way valve with an opening toward the cylinder 303 is provided in the suction pipe 308, and a fourth one-way valve with an opening toward the outside is provided on the side of the cylinder 303 close to the suction pipe 308. The hot gas is located in the heat preservation cover 206, which is convenient for the suction groove 302 to absorb and collect the hot gas. The hot gas is drawn into the chamber on the side of the cylinder 303 close to the output shaft through the suction groove 302 and the suction pipe 308. Fig. 9 To understand.

[0047] When the hot gas passes through the heat absorbing member 402 and the heat conducting member 403 in the intake pipe 308, most of the heat is absorbed by the heat absorbing member 402 and the heat conducting member 403, and then the heat is transferred to the heat transferring member 401 through the heat conducting plate 404. The heat transferring member 401 transfers the heat to the hot expanding gas 408 in the telescopic bag 407. The telescopic bag 407 is sealed and fixedly connected to the heat transferring member 401 and the moving member 406. The hot expanding gas 408 causes the telescopic bag 407 to stretch. The telescopic bag 407 is made of a heat-insulating material. The second elastic member 409 is stretched, thereby causing the moving member 406 to move away from the heat transferring member 401. The moving member 406 drives the third elastic member 412 and the pushing member 411 to move in the same direction.

[0048] When the guide groove 306 drives the piston 304 to move toward the direction close to the output shaft, due to the second one-way valve, the cylinder 303 draws external gas into the cylinder 303 through the piston 304. At the same time, due to the third one-way valve and the fourth one-way valve, the gas on the upper part of the piston 304, i.e., close to one end of the output shaft, is discharged to the outside through the fourth one-way valve. The gas will not be discharged into the heat preservation cover 206 through the suction groove 302. The heat preservation cover 206 can reduce the heat loss of the gas and ensure the absorption of the heat of the hot gas to a large extent.

[0049] The above process repeats itself, and after the telescopic bag 407 is stretched to a certain length, the movable member 406 drives the pushing member 411 to move to a position in contact with the pushing groove 410. Since the end face of the pushing member 411 close to the pushing groove 410 is an inclined surface that is wide at the top and narrow at the bottom, and the other end away from the pushing groove 410 is a plane, after the pushing member 411 contacts the side wall of the pushing groove 410, the pushing member 411 moves downward, and the third elastic member 412 is compressed, so that the pushing member 411 can move to the other side of the sliding member 204. After the pushing member 411 is no longer in contact with the pushing groove 410, the pushing member 411 moves upward under the action of the third elastic member 412, and the third elastic member 412 is no longer compressed.

[0050] With the continuous heat dissipation and heat collection of the glass tube, the telescopic bag 407 continues to expand, and the movable part 406 continues to move on the other side of the sliding part 204. After the glass tube recovers to a certain temperature and the heat is too weak to be collected, the thermal expansion gas 408 inside the telescopic bag 407 slowly and autonomously cools down, and the volume of the thermal expansion gas 408 gradually decreases. The telescopic bag 407 begins to gradually shrink, and the second elastic part 409 gradually recovers slowly. The movable part 406 moves in the opposite direction under the action of the telescopic bag 407 and the second elastic part 409, and the movable part 406 drives the pushing part 411 and the third elastic part 412 to move in the opposite direction.

[0051] When the pushing member 411 moves in the reverse direction to contact the pushing groove 410, since the end face of the pushing member 411 is a plane and cannot be squeezed, the pushing member 411 pushes the sliding member 204 to move toward the direction of the glass tube, and the sliding member 204 drives the second polishing member 203 to move toward the direction of the glass tube. The second polishing member 203 drives the sliding member 204 on the other side to move synchronously toward the direction of the glass tube through the sliding member 204 and the transmission member 205 thereon, and the sliding member 204 on this side drives the first polishing member 202 to move toward the direction of the glass tube, and the first elastic member is compressed.

[0052] After the first polishing piece 202 and the second polishing piece 203 move a certain distance in the direction close to the glass tube, the first polishing piece 202 contacts the moving column 208 on the second polishing piece 203, and the second polishing piece 203 contacts the moving column 208 on the first polishing piece 202, so that the fourth elastic piece 209 is compressed, and the contraction force of the telescopic bag 407 and the elastic force of the second elastic piece 409 are large enough to overcome the moving force of the sliding piece 204 and the elastic forces of the fourth elastic piece 209 and the first elastic piece, so that the relative end faces of the first polishing piece 202 and the second polishing piece 203 contact.

[0053] After the moving column 208 is squeezed to a certain extent, the two moving columns 208 move opposite to each other, the fourth elastic member 209 is compressed, and the moving column 208 no longer blocks the corresponding air outlet groove 207. The gas discharged from the cylinder 303 is discharged through the air outlet groove 207 on the first polishing member 202, and the other side of the cylinder 303 inhales air through the air outlet groove 207. At the same time, the air inhalation groove 302 can play a certain role in absorbing dust falling off during polishing, thereby preventing the workbench 201 from being contaminated, so that the outer wall thickness of the borosilicate glass tube is uniform and smooth, which is conducive to observing the changes inside the borosilicate glass tube during use.

[0054] After polishing is completed, the polishing machine body 1 is closed, and then the pusher 411 is pressed downward to compress the third elastic member 412. Then, under the action of the first elastic member, the two sliding members 204 move back to back, the heat preservation cover 206 is opened, and the polished borosilicate glass tube can be taken out.

[0055] The telescopic bag 407 and the heat expansion gas 408 can collect the heat of the glass tube and convert it into the movement of the telescopic bag 407 and the extension of the second elastic member 409. The elastic force of the second elastic member 409 is relatively strong, so that only when the temperature of the glass tube drops to a certain level and the physical properties are stabilized, the second elastic member 409 and the telescopic bag 407 overcome the resistance and pull the sliding member 204 to move and make the opposite ends of the two sliding members 204 contact, so that the first grinding member 202 and the second grinding member 203 grind the outer surface of the glass tube. The heat absorbing member 402 and other related components can be set to the first grinding member 202 and the second grinding member 203 after the temperature of the borosilicate glass tube drops to a certain level. The grinding piece 203 grinds the outer surface of the glass tube to ensure that the borosilicate glass tube is ground while its physical properties are stable, thereby preventing the first grinding piece 202 and the second grinding piece 203 from squeezing and damaging the glass tube, making the outer wall thickness of the borosilicate glass tube uniform and smooth, which is beneficial for observing the changes inside the borosilicate glass tube during use, and through the slow contraction of the thermal expansion gas 408 inside the telescopic bag 407, the pusher 411 pushes the sliding piece 204 to move more slowly, thereby making the contact between the first grinding piece 202 and the second grinding piece 203 and the glass tube softer, preventing the first grinding piece 202 and the second grinding piece 203 from colliding with the glass tube and causing the glass tube to break. Example 3

[0056] Although the above-mentioned embodiment can grind the borosilicate glass tube so that the outer wall material of the borosilicate glass tube is evenly distributed, when the telescopic bag 407 is expanded by hot air, although the heat transfer component 401, the heat absorption component 402, the heat conduction component 403 and the heat conduction plate 404 are all made of good heat absorption and heat conduction materials, due to the heat transfer process, a lot of heat will be lost due to the external temperature, resulting in a low amount of heat transferred in the end, and the telescopic bag 407 cannot be stretched to the corresponding length, resulting in the failure to achieve the effect of moving the sliding component 204 in the opposite direction.

[0057] On the basis of the above embodiments, in order to solve the above technical problems, referring to the accompanying drawings of the specification Figures 3 to 8 As shown, the adopted technical solution includes a heat energy conversion component 4, which includes a plurality of heat absorbing members 402 fixedly arranged in the air intake pipe 308, the plurality of heat absorbing members 402 are connected by heat conducting members 403, a heat conducting plate 404 is fixedly arranged between the heat conducting members 403 and the heat transfer member 401, and the inner wall of the second polishing member 203, the air intake pipe 308, the heat transfer member 401 and the outer surface of the heat conducting plate 404 are all wrapped with a layer of heat insulation layer 405, During the heat transfer process, since the air intake pipe 308, the second polishing member 203 and the air intake groove 302, the heat transfer member 401, and the outside of the heat conducting plate 404 are wrapped with an insulation layer 405, the influence of the surrounding environment on the heat transfer can be greatly reduced during the heat transfer process, so that the absorbed heat can act on the hot expansion gas 408 to a greater extent, so that the extension length of the telescopic bag 407 meets the requirements, thereby ensuring the normal movement of the sliding member 204.

[0058] By setting up the thermal insulation layer 405, the absorbed heat can be transferred to a greater extent, so that the expansion range of the thermal expansion gas 408 is larger, so that the effect of the thermal expansion gas 408 on the telescopic bag 407 is more obvious, and the extension length of the telescopic bag 407 reaches the required extension length, thereby ensuring the normal movement of the sliding member 204. Example 4

[0059] On the basis of the above embodiment, this embodiment further provides a method for accurately controlling the outer diameter of a borosilicate glass tube, comprising the following steps: S1. Place the borosilicate glass tube on the support 101, start the polishing machine body 1, and rotate the borosilicate glass tube; S2. Blowing the borosilicate glass tube and absorbing the hot air through the exhaust groove 301 and the air intake groove 302; S3. The first polishing member 202 and the second polishing member 203 move toward the borosilicate glass tube and polish; S4. After polishing is completed, open the heat preservation cover 206 and take out the borosilicate glass tube.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for precisely controlling the outer diameter of a borosilicate glass tube, comprising a polishing machine body (1), wherein a support member (101) is provided on an output shaft of the polishing machine body (1), characterized in that: Also includes: A grinding assembly (2), the grinding assembly (2) comprising a workbench (201) arranged on one side of the polishing machine body (1), the workbench (201) being provided with a first grinding piece (202) and a second grinding piece (203) capable of relative movement at one end close to the output shaft of the polishing machine body (1), and being used for grinding the outer wall of the glass tube; A gas collecting component (3), the gas collecting component (3) comprising a plurality of exhaust grooves (301) opened on the first polishing piece (202) and opening toward the support piece (101), and a plurality of air intake grooves (302) opened toward the support piece (101) on the second polishing piece (203), for dissipating heat and collecting heat from the glass tube; A heat energy conversion component (4), the heat energy conversion component (4) comprising a heat transfer component (401) fixedly arranged inside the workbench (201), used for converting the heat energy absorbed by the gas collecting component (3) into mechanical energy for moving the first grinding component (202) and the second grinding component (203).

2. The device for accurately controlling the outer diameter of a borosilicate glass tube according to claim 1, characterized in that: The first polishing piece (202) and the second polishing piece (203) are both slidably connected to the workbench (201) via a sliding piece (204); a transmission piece (205) is provided at one end of the first polishing piece (202) close to the second polishing piece (203); the other end of the transmission piece (205) passes through the workbench (201) and is fixedly connected to one end of the second polishing piece (203) away from the first polishing piece (202); and a first elastic piece is provided between the first polishing piece (202) and the workbench (201).

3. The device for accurately controlling the outer diameter of a borosilicate glass tube according to claim 2, characterized in that: The gas collecting assembly (3) further comprises a cylinder (303) arranged on a side of the workbench (201) close to the polishing machine body (1), a piston (304) being slidably arranged in the cylinder (303), a cam (305) being fixedly arranged on the output shaft of the polishing machine body (1), a guide groove (306) being formed at one end of the cam (305) away from the polishing machine body (1), and the piston (304) being inserted into the guide groove (306) and being able to slide in the guide groove (306).

4. The device for accurately controlling the outer diameter of a borosilicate glass tube according to claim 3, characterized in that: One end of the cylinder (303) away from the output shaft of the polishing machine body (1) is connected to the plurality of exhaust grooves (301) via an exhaust pipe (307), and one end of the cylinder (303) close to the output shaft of the polishing machine body (1) is connected to the plurality of intake grooves (302) via an intake pipe (308). One end of the cylinder (303) away from the output shaft of the polishing machine body (1) is provided with a first one-way valve (309) with an opening facing the interior of the cylinder (303).

5. The device for accurately controlling the outer diameter of a borosilicate glass tube according to claim 4, characterized in that: The heat energy conversion component (4) further comprises a plurality of heat absorbing members (402) fixedly arranged in the air intake pipe (308); the plurality of heat absorbing members (402) are connected to each other via a heat conducting member (403); a heat conducting plate (404) is fixedly arranged between the heat conducting member (403) and the heat transfer member (401); and the inner wall of the second polishing member (203), the air intake pipe (308), the heat transfer member (401) and the outer surface of the heat conducting plate (404) are all wrapped with a thermal insulation layer (405).

6. The device for accurately controlling the outer diameter of a borosilicate glass tube according to claim 5, characterized in that: A moving part (406) is slidably provided inside the workbench (201), a telescopic bag (407) is fixedly provided between the moving part (406) and the heat transfer part (401), and the telescopic bag (407) is filled with thermal expansion gas (408).

7. The device for accurately controlling the outer diameter of a borosilicate glass tube according to claim 6, characterized in that: A second elastic member (409) located inside the telescopic bag (407) is provided between the opposite ends of the heat transfer member (401) and the moving member (406).

8. The device for accurately controlling the outer diameter of a borosilicate glass tube according to claim 7, characterized in that: A pushing groove (410) is provided at one end of the sliding member (204) corresponding to the second polishing member (203) and in contact with the workbench (201); a pushing member (411) capable of being inserted into the pushing groove (410) is slidably provided in the movable member (406); and a third elastic member (412) is provided between one end of the pushing member (411) away from the suction pipe (308) and the movable member (406).

9. The device for accurately controlling the outer diameter of a borosilicate glass tube according to claim 8, characterized in that: The workbench (201) is provided with a heat-insulating cover (206), the opposite ends of the first polishing piece (202) and the second polishing piece (203) are both located in the heat-insulating cover (206), and the end of the heat-insulating cover (206) away from the output shaft of the polishing machine body (1) can be opened, the first polishing piece (202) and the second polishing piece (203) are both provided with air outlet grooves (207), the air exhaust grooves (301) and the air intake grooves (302) are both connected to the corresponding air outlet grooves (207), the first polishing piece (202) and the second polishing piece (203) are both slidably provided with movable columns (208) capable of covering the corresponding air outlet grooves (207), and a fourth elastic member (209) is provided between the first polishing piece (202) and the second polishing piece (203) and the corresponding movable columns (208).

10. A method for precisely controlling the outer diameter of a borosilicate glass tube, using the device for precisely controlling the outer diameter of a borosilicate glass tube as claimed in claim 9, characterized in that: The following steps are involved: S1. placing a borosilicate glass tube on the support member (101), starting the polishing machine body (1), and rotating the borosilicate glass tube; S2. blowing air into the borosilicate glass tube and absorbing hot air through the exhaust groove (301) and the air intake groove (302); S3. The first polishing member (202) and the second polishing member (203) are moved toward the borosilicate glass tube and polished; S4. After polishing is completed, the heat-insulating cover (206) is opened to take out the borosilicate glass tube.

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