Automatic scribing device and method for ceramic tube

Abstract

The invention discloses a ceramic tube automatic scribing device and method.The device comprises a rack, a clamping assembly, a transmission assembly, a driving assembly, a ceramic tube and a spray head assembly, the clamping assembly is fixed to the rack and used for automatically clamping the ceramic tube, the transmission assembly is arranged on the rack to drive the clamping assembly to rotate, and the spray head assembly is arranged on the rack to drive the ceramic tube to rotate; the driving assembly is arranged on the rack and drives the clamping assembly to move to clamp and loosen the ceramic tube, and the spray head assembly is erected at the top of the rack and used for scribing the ceramic tube. According to the ceramic tube marking device, the clamping assembly is arranged to clamp a ceramic tube, the driving assembly is arranged to drive the clamping rod to clamp the ceramic tube placed on the supporting block, and the transmission assembly is arranged to drive the clamping rod to rotate the clamped ceramic tube, so that the nozzle assembly is matched to mark the ceramic tube; and different positions of the ceramic tube are marked by arranging the spray head assembly, and the ceramic tube is clamped through the clamping rod and can be fixed when facing different tube diameters.

Description

Technical Field

[0001] The invention belongs to the technical field of ceramic tube marking, and in particular relates to a ceramic tube marking device and method. Background Art

[0002] Pipes are materials used to make pipe fittings. Different pipe fittings require different pipes. The quality of the pipes directly determines the quality of the pipe fittings. Construction projects, power plants, chemical plants, etc. mostly use such pipes for high-pressure boilers; seamless steel pipes for conveying fluids: seamless steel pipes for low-pressure boilers, seamless steel pipes for petroleum cracking, and stainless steel seamless steel pipes for fluid conveying. Common materials include alloy carbon steel and stainless steel.

[0003] Ceramic pipe is a composite pipe that combines the advantages of metal and ceramic materials. It is mainly used in high-wear and high-corrosion environments. It consists of three layers: corundum ceramic, transition layer and steel. The ceramic layer forms dense corundum ceramic (AL2O3) at a high temperature above 2200℃, and is firmly bonded to the steel pipe through the transition layer. Ceramic pipes in the prior art often involve cutting during actual use. Ceramic pipes in the prior art need to be marked before cutting. The existing marking device cannot be used for pipes of different thicknesses, and lacks an automatic marking structure.

[0004] A Chinese patent with application number 202122601593.5 discloses a pipe cutting and marking device, including a first support plate, a second support plate, a roller, a base plate, a clamping mechanism and a lifting mechanism; by rotatably connecting two rollers on the first support plate and the second support plate respectively, and by arranging a clamping mechanism on the upper end of the base plate, and arranging a lifting and lowering fixed seat on the clamping mechanism, and rotatably connecting a rotating wheel on the fixed seat, the pipe is pressed on the roller, and the pipe does not move other than rotation, and then the lifting and lowering of the marker pen is controlled by the lifting mechanism, so as to ensure the stability of the marking process and avoid the tilt of the marking, which causes the incision to be tilted and is not conducive to welding; by arranging a spring in the lifting mechanism, the pen tip of the marker pen is buffered to avoid damage to the pen tip of the marker pen. The device has a complex structure and cannot be clamped for pipes of different calibers, and has a low degree of automation. Therefore, it needs to be improved. Summary of the invention

[0005] The object of the present invention is to provide a ceramic tube marking device and method, and the technical problem to be solved is that most of the automatic ceramic tube marking devices in the prior art cannot clamp various tube diameters and have a low degree of automation.

[0006] To achieve the above object, the present invention provides the following technical solutions: In the first aspect, the present invention provides an automatic marking device for ceramic tubes, comprising a frame, a clamping assembly, a transmission assembly, a drive assembly, a ceramic tube and a nozzle assembly, wherein the clamping assembly is fixed on the frame and is used to automatically clamp the ceramic tube, the transmission assembly is arranged on the frame to drive the clamping assembly to rotate, the drive assembly is arranged on the frame to drive the clamping assembly to clamp and release the ceramic tube, and the nozzle assembly is mounted on the top of the frame to mark the ceramic tube.

[0007] The ceramic tube is clamped by setting a clamping assembly, the ceramic tube placed on the support block is clamped by a clamping rod driven by a driving assembly, the clamping rod is driven to rotate the clamped ceramic tube by a transmission assembly, and the ceramic tube is marked with a nozzle assembly, and marking at different positions of the ceramic tube is achieved by setting a nozzle assembly.

[0008] Optionally, the clamping assembly is a pair and symmetrically arranged on the top of the frame, each of the clamping assemblies includes a clamping table, a bearing cylinder and a clamping rod, the clamping table is fixed on the top of the frame, the bearing cylinder is movably sleeved in the clamping table, and the clamping rod is fixedly sleeved in the bearing cylinder. By sleeved the clamping rod in the fixed cylinder, when the clamping rod turns, the clamping table is fixed to the top of the frame under the action of the bearing cylinder, and the ceramic tube is clamped and fixed by means of a pair of clamping rods. Ceramic tubes with different diameters can also be fixed without the need to adjust product parameters. The operation is convenient and the efficiency is high.

[0009] Optionally, the transmission assembly is a pair, each of which includes a rotating shaft, a driving wheel, a driven wheel and a rack. The driving wheel is fixedly mounted on the rotating shaft, the driven wheel is fixedly mounted on the clamping rod, and the rack is meshingly connected with the driving wheel and the driven wheel. The driving wheel is fixed on the rotating shaft, the driven wheel is fixed on the clamping rod, the driving wheel is driven to rotate by a motor, and the driven wheel is driven to rotate under the meshing action of the rack, thereby realizing the rotation of the clamping rod.

[0010] Optionally, the driving assembly includes a lead screw, a cam nut, a fixing rod and a bearing, and the driving assembly is a pair and symmetrically connected on a frame, the cam nut is threadedly connected to the lead screw, one end of the fixing rod is fixed to a side of the cam nut, and the other end is fixed to an outer periphery of the bearing, and the bearing is fixedly sleeved on an outer wall of the clamping rod, and the lead screw is arranged to drive the cam nut threadably engaged with the lead screw to move linearly along the lead screw.

[0011] Optionally, the driving assembly further comprises a first motor, one end of which is drivingly connected to the end of the lead screw, and the other end of which is fixed to the frame.

[0012] Optionally, the driving assembly also includes a ramp, a support mechanism and a pulley. The ramp has a right-angled trapezoidal cross-section and is arranged at the top of the cam nut. The support mechanism is connected to the bottom of the ceramic tube and the bottom of the support mechanism faces the through-frame. The pulley is arranged at the bottom of the support mechanism and the pulley rotates along the slope of the ramp. By setting the ramp, when the clamping rod does not clamp the ceramic tube, the pulley is located on the top of the ramp. When the clamping rod moves toward the ceramic tube, the pulley slides along the inclined surface of the ramp. When the clamping rod completely clamps the ceramic tube, the support mechanism no longer has supporting force on the ceramic tube.

[0013] Optionally, the support mechanism includes a support block and a support rod, the support block is connected to the bottom of the ceramic tube, the support block is provided with a slot for easy clamping, the support rod is fixed to the bottom of the support block and passes through the frame to be connected to the pulley.

[0014] In a second aspect, the present invention further provides a marking method of the automatic marking device for ceramic tubes according to any one of the first aspects, comprising: placing the ceramic tube on the support mechanism; Start the driving component to drive the clamping component to clamp the ceramic tube; The transmission assembly is started to drive the clamping rod to rotate, which drives the clamping rod to rotate axially on the ceramic tube, and the nozzle assembly evenly marks the ceramic tube.

[0015] Optionally, the starting driving assembly drives the clamping assembly to clamp the ceramic tube, specifically including: Start the first motor to drive the lead screw to rotate. Under the threaded connection, the cam nuts symmetrically arranged at both ends of the lead screw move toward the middle. At this time, the fixed rod drives a pair of clamping rods in the clamping assembly to move toward the middle until the clamping rods clamp the ceramic tube and stop.

[0016] Optionally, the starting transmission assembly drives the clamping rod to rotate, and drives the clamping rod to rotate axially of the ceramic tube, specifically including: The third motor is started to drive the rotating shaft to rotate, and the driving wheel on the rotating shaft rotates. Under the action of the rack, the driven wheel meshing with the driven wheel is driven, and the rotation of the driven wheel drives the clamping rod fixed thereon to rotate according to the set program.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The automatic marking device for ceramic tubes of the present invention achieves the clamping of the ceramic tube by setting a clamping assembly, drives the clamping rod to clamp the ceramic tube placed on the support block by setting a driving assembly, drives the clamping rod to rotate the clamped ceramic tube by setting a transmission assembly, thereby cooperating with the nozzle assembly to mark the ceramic tube, and marking at different positions of the ceramic tube is achieved by setting the nozzle assembly.

[0018] 2. The automatic marking device for ceramic tubes of the present invention is implemented by sleeve-mounting a clamping rod in a fixed cylinder. When the clamping rod rotates, the clamping platform is fixed to the top of the frame under the action of the bearing cylinder, and the ceramic tube is clamped and fixed by a pair of clamping rods. Ceramic tubes of different diameters can also be fixed, and there is no need to adjust product parameters. The operation is convenient and the efficiency is high.

[0019] 3. The automatic marking device for ceramic tubes of the present invention is provided with a ramp. When the clamping rod does not clamp the ceramic tube, the pulley is located on the top of the ramp. When the clamping rod moves toward the ceramic tube, the pulley slides along the inclined surface of the ramp. When the clamping rod completely clamps the ceramic tube, the supporting mechanism no longer has supporting force on the ceramic tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the clamping mechanism of the present invention; Figure 3 It is an enlarged structural schematic diagram of the transmission assembly of the present invention; Figure 4 It is another perspective structural schematic diagram of the present invention; Figure 5 It is a schematic diagram of the enlarged structure of the driving component of the present invention; Figure 6 It is a schematic diagram of the enlarged structure of the nozzle assembly of the present invention.

[0021] In the figure: 1-frame, 2-clamping assembly, 21-clamping table, 22-bearing cylinder, 23-clamping rod, 3-transmission assembly, 31-rotating shaft, 32-driving wheel, 33-driven wheel, 34-rack, 35-third motor, 4-driving assembly, 41-screw, 42-cam nut, 43-fixed rod, 44-bearing, 45-ramp, 46-support block, 47-support rod, 48-pulley, 49-first motor, 5-ceramic tube, 6-sprinkler assembly, 61-support frame, 62-second motor, 63-transmission belt, 64-transmission shaft, 65-screw, 66-slider, 67-sprinkler. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Embodiment 1

[0023] like Figures 1 to 6As shown, an automatic marking device for ceramic tubes is provided, comprising a frame 1, a clamping assembly 2, a transmission assembly 3, a drive assembly 4, a ceramic tube 5 and a nozzle assembly 6, wherein the clamping assembly 2 is preferably a pair and symmetrically fixed on the frame 1, wherein the transmission assembly 3 is connected to the frame 1 and connected to the clamping assembly 2, wherein the drive assembly 4 is also connected to the frame 1 and connected to the clamping assembly 2, the ceramic tube 5 in this embodiment is clamped and fixed by the clamping assembly 2, wherein the ceramic tube 5 can also be replaced with other tubular structures that need marking, and the nozzle assembly 6 in this embodiment is mounted on the top of the frame 1.

[0024] During use, the operator places the ceramic tube 5 that needs to be marked, and the driving component 4 moves to drive the clamping component 2 to move, automatically clamping the ceramic tube 5. Then the nozzle component 6 marks the ceramic tube 5. Then the transmission component 3 starts to drive the clamping component 2 to rotate. After the nozzle component 6 moves, the marking of the two ends of the ceramic tube 5 is achieved.

[0025] refer to Figure 2 As shown, each clamping assembly 2 in this embodiment includes a clamping platform 21, a bearing cylinder 22 and a clamping rod 23, wherein the clamping platform 21 is preferably fixed to the top of the frame 1 by bolts in the prior art, and the clamping platform 21 in each clamping assembly 2 is preferably a convex structure, wherein the bearing cylinder 22 is slidably sleeved in the clamping platform 21, and the clamping rod 23 is fixedly sleeved in the inner ring of the bearing cylinder 22.

[0026] When in use, the driving component 4 drives the clamping rod 23 and the bearing cylinder 22 to slide in the clamping table 21 until the end of the clamping rod 23 abuts against and clamps the ceramic tube 5, and the transmission component 3 drives the clamping rod 23 to rotate in the bearing cylinder 22 to realize the rotational marking of the ceramic tube 5. More preferably, in order to increase the stability of the clamping of the ceramic tube 5, holes for easy clamping are opened at both ends of the ceramic tube 5, and protrusions corresponding to the holes can also be set at both ends of the clamping rod 23. When clamping, the protrusions at the ends of the clamping rod 23 abut against the holes to increase the stability of the clamping.

[0027] refer to Figure 4 and Figure 5 As shown, in this embodiment, the driving assembly 4 includes a lead screw 41, wherein a first motor 49 is fixed to one end of the lead screw 41, wherein the first motor 49 is preferably a motor in the prior art and is fixed to the side frame of the frame 1 by bolts, and in this embodiment, cam nuts 42 are threadedly connected from the middle to both ends of the lead screw 41, wherein each cam nut 42 is fixed to a fixing rod 43 on the outer side, and in this embodiment, the fixing rod 43 passes through the top of the frame 1 upward and is connected to the clamping rod 23, wherein the axial sleeve of the clamping rod 23 is provided with a bearing 44, and the fixing rod 43 is fixedly connected to the outer wall of the outer ring of the bearing 44.

[0028] During use, when the ceramic tube 5 needs to be clamped in this embodiment, the first motor 49 is started, the screw 41 rotates and drives a pair of cam nuts 42 thereon to move toward the middle along the screw 41. At this time, under the action of the fixed rod 43, a pair of clamping rods 23 are driven to move toward the middle, thereby clamping the ceramic tube 5. When the transmission assembly 3 drives the clamping rod 23 to rotate, the bearing 44 is provided to ensure the smooth rotation of the clamping rod 23.

[0029] In the present embodiment, the drive assembly 4 also includes a supporting mechanism, wherein the supporting mechanism includes a supporting block 46 and a supporting rod 47. In the present embodiment, the supporting rod 47 is fixed at the bottom of the supporting block 46, wherein the supporting rod 47 moves downward to pass through the top of the frame 1, wherein a pulley 48 is provided at the end of the supporting rod 47. In the present embodiment, a ramp 45 is integrally formed at the top of the cam nut 42, wherein the cross-section of the ramp 45 is preferably a right-angled trapezoidal shape in the prior art, and when the top of the ramp 45 with a right-angled trapezoidal cross-section abuts against the pulley 48, the supporting block 46 tops the ceramic tube 5. In the present embodiment, a groove is provided at the top of the supporting block 46 to facilitate the support of the ceramic tube 5, wherein the groove is preferably a V-shaped groove or a circular groove in the prior art.

[0030] When in use, when the machine is not in operation, the pulley 48 stops at the top of the ramp 45 on the cam nut 42. When in use, start the first motor 49, and the screw 41 rotates to drive the cam nut 42 and the ramp 45 to move toward the middle. At this time, due to the existence of the inclined surface of the ramp 45 and the gravity of the supporting mechanism itself, after the pulley 48 completely clamps and fixes the ceramic tube 5 by the clamping rod 23, the pulley 48 is at the top of the cam nut 42 through the inclined surface of the ramp 45. This technology only requires the operator to place the ceramic tube 5 on the support block 46, and the device can complete a complete set of marking actions with high efficiency.

[0031] refer to Figure 3 As shown, the transmission assembly 3 in this embodiment includes a third motor 35, wherein the third motor 35 is fixed to the side frame of the frame 1 by bolts in the prior art, and the output shaft of the third motor 35 in this embodiment is fixedly connected with a rotating shaft 31, wherein the rotating shaft 31 is fixedly connected with a driving wheel 32 near both ends, and a driven wheel 33 is fixed on the clamping rod 23 in each clamping assembly 2 in this embodiment corresponding to the driving wheel 32, and the driving wheel 32 and the driven wheel 33 in this embodiment are meshingly connected with a rack 34.

[0032] When in use, the third motor 35 is started, and the rotating shaft 31 is driven to rotate under the action of the output shaft. At this time, the driving wheel 32 on the rotating shaft 31 rotates, and under the action of the rack 34, the driven wheel 33 on the clamping rod 23 rotates, thereby driving the clamping rod 23 to rotate, thereby controlling the rotation of the ceramic tube 5 when clamping it.

[0033] refer to Figure 6As shown, in this embodiment, the nozzle assembly 6 includes a support frame 61, wherein the support frame 61 is preferably a hollow frame structure, wherein the length of the support frame 61 is preferably greater than the length of the ceramic tube 5, and transmission shafts 64 are fixed at both ends of the frame of the support frame 61, wherein the two fixed shafts 64 are fixed with screws 65, and the screws 65 in this embodiment are preferably parallel to the ceramic tube 5, and a second motor 62 is fixed to the top of the support frame 61 in this embodiment, wherein the output shaft 64 of the second motor 62 is connected to the transmission shaft 64 through a transmission belt 63, and a slider 66 is also threadedly connected to the screw 65 in this embodiment, and a nozzle 67 is fixed to the bottom of the slider 66 in this embodiment, wherein the nozzle 67 faces the ceramic tube 5, and more preferably, the nozzle 67 in this embodiment can adopt a stainless steel bellows in the prior art.

[0034] During use, when the ceramic tube 5 is clamped, the nozzle 67 is aimed at one end of the ceramic tube 5. At this time, the third motor 35 rotates to drive the ceramic tube 5 to rotate, and the nozzle 67 starts to spray and mark until the end of the ceramic tube 5 is marked with a full circle of lines. At this time, the third motor 35 stops rotating, and the second motor 62 starts to drive the slider 66 to move along the screw 65 until the nozzle 67 corresponds to the other end of the ceramic tube 5. At the same time, the nozzle 67 sprays the ceramic tube 5 during the movement. At this time, the third motor 35 is started again until the other end of the ceramic tube 5 is also marked with a circle, and the marking is completed. Embodiment 2

[0035] like Figures 1 to 6 As shown, based on the first embodiment, this embodiment further proposes a ceramic tube automatic marking method, including: Placing the ceramic tube 5 on the supporting mechanism; Start the driving component 4 to drive the clamping component 2 to clamp the ceramic tube 5; The transmission assembly 3 is started to drive the clamping rod 23 to rotate, which drives the clamping rod 23 to rotate axially with respect to the ceramic tube 5 , and the nozzle assembly 6 evenly marks the ceramic tube 5 .

[0036] In this embodiment, the operator places the ceramic tube 5 to be scribed on the support block 46, starts the first motor 49, drives the lead screw 41 to rotate, and a pair of cam nuts 42 threadedly connected thereto begin to move toward the middle. At this time, the fixing rod 43 connected to the cam nut 42 drives the clamping rod 23 to move toward the middle. At the same time, the pulley 48 located at the top of the cam nut 42 moves and descends under the action of the unloading surface of the ramp 45 until the ceramic tube 5 is clamped and fixed by the clamping rod 23. At this time, the pulley 48 descends from the top of the ramp 45 to the top of the cam nut 42.

[0037] At this time, the third motor 35 starts, and under the action of the driving wheel 32 and the driven wheel 33, the clamping rod 23 drives the ceramic tube 5 to rotate. At the same time, the nozzle 67 is controlled to start spraying and marking until the end of the ceramic tube 5 is marked with a full circle of lines. At this time, the third motor 35 stops running, and the second motor 62 starts to drive the slider 66 to move along the screw 65 until the nozzle 67 moves to the other end of the corresponding ceramic tube 5. At the same time, the nozzle 67 sprays the ceramic tube 5 during the movement. At this time, the third motor 35 is started again until the other end of the ceramic tube 5 is also marked with a circle.

[0038] In this embodiment, the ceramic tube 5 needs to be cleaned before marking, specifically including wiping with a clean soft cloth to remove surface dust and oil. At the same time, for ceramic tubes with heavy oil stains, it is preferably cleaned with a ceramic cleaning machine in the prior art, then rinsed with clean water, and finally wiped with a clean soft cloth as above.

[0039] At the same time, when placing the ceramic tube 5 in this embodiment, it should be noted that in this embodiment, a V-shaped groove or a circular groove is opened in the support block 46 so that when the ceramic tube 5 is placed, its center line is aligned with the center line of the clamping rod 23 to the greatest extent, which provides convenience for subsequent clamping and marking operations.

[0040] In this embodiment, the moving distance of the cam nut 42 is preferably monitored in real time by a displacement sensor in the prior art. At the same time, during the clamping process, the clamping pressure of the clamping rod 23 on the ceramic tube 5 is monitored by a pressure sensor to ensure that the pressure is within an appropriate range to avoid excessive force that damages the ceramic tube, or insufficient force that causes the ceramic tube to shake during subsequent processing.

[0041] In this embodiment, in order to ensure the movement of the cam nut 42 on the lead screw 41 until the clamping rod 23 clamps the ceramic tube 5, the pulley 48 moves from the top of the ramp 45 to the top of the cam nut 42. This process is calculated by a functional relationship, and the derivation process is as follows: In this embodiment, it is assumed that the first motor 49 drives the lead screw 41 to move at a constant speed, and the motor speed is set to (Unit: revolutions per minute, r / min), the angular velocity of the screw 41 is (Unit: radian / second, rad / s), from this we can get, .

[0042] The screw 41 drives the cam nut 42 to move: the screw 41 and the cam nut 42 are threaded, and the pitch of the screw 41 is (Unit: meter, m), at time (Unit: seconds, s) The displacement of the cam nut 42 along the axial direction of the screw 41 (Unit: meter, m) and the rotation angle of the lead screw 41 Related, and , then the displacement of the cam nut 42 for: , Will Substituting into the above formula, we can get: .

[0043] When the pulley 48 moves on the ramp 45, the angle between the ramp 45 and the horizontal direction is (Unit: radian, rad), pulley 48 descending height (Unit: meter, m) and cam nut 42 displacement Satisfies the geometric relationship of a right triangle, namely: , Bring in: .

[0044] in The lead screw has a pitch of 41. is the motor rotation time, It is the angle between the slope surface and the horizontal direction.

[0045] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. An automatic marking device for ceramic tubes, characterized in that: The invention comprises a frame (1), a clamping assembly (2), a transmission assembly (3), a drive assembly (4), a ceramic tube (5) and a nozzle assembly (6); the clamping assembly (2) is fixed on the frame (1) and is used to automatically clamp the ceramic tube (5); the transmission assembly (3) is arranged on the frame (1) to drive the clamping assembly (2) to rotate; the drive assembly (4) is arranged on the frame (1) to drive the clamping assembly (2) to move to clamp and release the ceramic tube (5); and the nozzle assembly (6) is mounted on the top of the frame (1) to mark the ceramic tube (5).

2. The automatic marking device for ceramic tubes according to claim 1, characterized in that: The clamping assemblies (2) are a pair and are symmetrically arranged on the top of the frame (1); each of the clamping assemblies (2) comprises a clamping platform (21), a bearing cylinder (22) and a clamping rod (23); the clamping platform (21) is fixed on the top of the frame (1); the bearing cylinder (22) is movably sleeved in the clamping platform (21); and the clamping rod (23) is fixedly sleeved in the bearing cylinder (22).

3. The automatic marking device for ceramic tubes according to claim 2, characterized in that: The transmission assemblies (3) are a pair, each of which comprises a rotating shaft (31), a driving wheel (32), a driven wheel (33) and a rack (34); the driving wheel (32) is fixedly sleeved on the rotating shaft (31), the driven wheel (33) is fixedly sleeved on the clamping rod (23), and the rack (34) is meshingly connected with the driving wheel (32) and the driven wheel (33).

4. The automatic marking device for ceramic tubes according to claim 2 or 3, characterized in that: The driving assembly (4) comprises a lead screw (41), a cam nut (42), a fixing rod (43) and a bearing (44); the driving assembly (4) is a pair and is symmetrically connected and arranged on the frame (1); the cam nut (42) is threadedly connected to the lead screw (41); one end of the fixing rod (43) is fixed to the side of the cam nut (42) and the other end is fixed to the outer periphery of the bearing (44); and the bearing (44) is fixedly sleeved on the outer wall of the clamping rod (23).

5. The automatic marking device for ceramic tubes according to claim 4, characterized in that: The driving assembly (4) further comprises a first motor (49), one end of the first motor (49) being drivingly connected to the end of the lead screw (41), and the other end of the first motor (49) being fixed to the frame (1).

6. The automatic marking device for ceramic tubes according to claim 5, characterized in that: The driving assembly (4) further comprises a ramp (45), a support mechanism and a pulley (48); the ramp (45) has a right-angle trapezoidal cross section and is arranged on the top of the cam nut (42); the support mechanism is connected to the bottom of the ceramic tube (5), and the bottom of the support mechanism faces the through-frame (1); the pulley (48) is arranged at the bottom of the support mechanism, and the pulley (48) rotates in contact with the slope of the ramp (45).

7. The automatic marking device for ceramic tubes according to claim 6, characterized in that: The support mechanism comprises a support block (46) and a support rod (47); the support block (46) is connected to the bottom of the ceramic tube (5); the support block (46) is provided with a notch for easy clamping; the support rod (47) is fixed to the bottom of the support block (46), passes through the frame (1), and is connected to a pulley (48).

8. A marking method for a ceramic tube automatic marking device according to any one of claims 1 to 7, characterized in that: include: placing the ceramic tube (5) on a supporting mechanism; Starting the driving component (4) to drive the clamping component (2) to clamp the ceramic tube (5); The transmission assembly (3) is started to drive the clamping rod (23) to rotate, thereby driving the clamping rod (23) to rotate axially with respect to the ceramic tube (5), and the nozzle assembly (6) evenly marks the ceramic tube (5).

9. The automatic marking method for ceramic tubes according to claim 8, characterized in that: The starting driving component (4) drives the clamping component (2) to clamp the ceramic tube (5), specifically comprising: The first motor (49) is started to drive the lead screw (41) to rotate. Under the threaded connection, the cam nuts (42) symmetrically arranged at both ends of the lead screw (41) move toward the middle. At this time, the fixed rod (43) drives a pair of clamping rods (23) in the clamping assembly (2) to move toward the middle until the clamping rods (23) clamp the ceramic tube (5) and stop.

10. A ceramic tube automatic marking method according to claim 8 or 9, characterized in that: The starting transmission assembly (3) drives the clamping rod (23) to rotate, thereby driving the clamping rod (23) to rotate axially with respect to the ceramic tube (5), specifically comprising: The third motor (35) is started to drive the rotating shaft (31) to rotate, and the driving wheel (32) located on the rotating shaft (31) rotates. Under the action of the rack (34), the driven wheel (33) meshing with the rotating shaft (31) is driven. The driven wheel (33) rotates and drives the clamping rod (23) fixed thereon to rotate according to a set program.

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