An automatic ceramic blank forming device

Abstract

The present invention belongs to the technical field of ceramic forming, and relates to an automatic ceramic blank forming device, which includes an upper rolling device, a lower rolling device and an electric control device. The upper rolling device includes a horizontal platform, a vertical platform and a rolling mechanism. The lower rolling device is arranged below the rolling mechanism. The lower rolling device includes an equipment box, a mold clamping device, an electromagnetic floating device, a dynamic torque sensor and a driving device three. The lower part of the mold clamping device is connected with the electromagnetic floating device, and the electromagnetic floating device is fixedly connected with the equipment box. The electromagnetic floating device can drive the mold clamping device to move up and down. The lower part of the mold clamping device is connected with a transmission shaft, and the transmission shaft is connected with the driving device three. The driving device three is longitudinally slidably connected with the equipment box, and the output end of the driving device three is connected with the dynamic torque sensor. Linear pressure adjustment is realized through the cooperation of the dynamic torque sensor, the electromagnetic floating device and the electric control device, so as to improve the automatic production efficiency and the finished product rate of thin-walled ceramic blanks.

Description

Technical Field

[0001] The present invention belongs to the technical field of ceramic forming, and particularly relates to an automatic forming device for ceramic blanks. Background Art

[0002] The thickness of the blanks of existing machined daily-use ceramics is usually in the range of 2-3 mm, while thin-blank ceramics refer to ultra-thin ceramic substrates with a thickness less than 1 mm, such as kaolin thin-blank ceramics and bone china. Currently, ceramics with a thickness less than 1 mm basically need to be hand-carved. The main reason is that in the traditional spinning blank forming process, the rotation of the rolling head easily causes deformation of thin-blank ceramics and cracking at the edges of the ceramic blanks. Although the injection molding can achieve a thin wall of 1-1.5 mm, affected by the uneven water absorption rate of the plaster mold, the blank is prone to a thickness gradient difference, resulting in uneven shrinkage during the drying process and stress concentration during firing, affecting the mechanical strength and appearance of the product. At the same time, in the blank making stage, the existing machining equipment has insufficient control over the viscosity and water content of the blank material, resulting in a thickness fluctuation of more than ±5% in the rolling forming of the blank. Existing rolling presses are difficult to maintain the gap accuracy in the production of thin-blank ceramics, resulting in uneven density of the blanks. For example, a ceramic blank rolling press disclosed in Chinese Patent Publication No. CN111923195B has a first rolling head motor and a second rolling head motor arranged at both ends of the V-shaped rolling arm respectively, and the microprocessor executes servo motor control of the stroke to achieve double-rolling head motor rolling. Its working principle is the same as that of traditional ceramic blank rolling presses, and the thickness of the ceramic blank is controlled by controlling the stroke of the rolling head. However, when making thin-blank ceramics with a thickness less than 2 mm, affected by the viscosity and water content of the blank material, the rolling head with a fixed stroke easily causes fine cracking of the blank body and the edges of the blank body of thin-blank ceramics, resulting in the breakage rate increasing to more than 20% after firing, and the breakage rate and scrap rate gradually increase as the thickness of the thin-blank ceramics gradually decreases. To solve the above problems, it is urgent to develop an equipment that can automatically complete the rolling forming of thin-blank ceramics to achieve large-scale and stable production of thin-blank ceramics. Summary of the Invention

[0003] In view of the above problems, the present invention provides an automatic forming device for ceramic blanks, which well solves the problem that the existing rolling equipment is prone to cause deformation and cracking of the blank body and the edges of the blank body when making thin-blank ceramics, resulting in a relatively high breakage rate.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows: An automatic ceramic blank forming device includes an upper rolling device, a lower rolling device, and an electric control device. The upper rolling device includes a horizontal platform, a vertical platform, and a rolling mechanism. The lower part of the vertical platform is slidably connected to the upper part of the horizontal platform. A driving device I is arranged on the horizontal platform, and the driving device I can drive the vertical platform to move along the horizontal platform. The rolling mechanism is slidably connected to the front side of the vertical platform. A driving device II is arranged on the vertical platform, and the driving device II can drive the rolling mechanism to slide up and down along the vertical platform. The lower rolling device is arranged below the rolling mechanism. The lower rolling device includes an equipment box and a mold clamping device, an electromagnetic floating device, a dynamic torque sensor, and a driving device III inside the equipment box. The lower part of the mold clamping device is rotatably connected to the electromagnetic floating device, and the electromagnetic floating device is fixedly connected to the equipment box. The electromagnetic floating device can drive the mold clamping device to move up and down. The lower part of the mold clamping device is connected to a transmission shaft, and the transmission shaft is connected to a driving device III. The driving device III is longitudinally slidably connected to the equipment box. The output end of the driving device III is connected to a dynamic torque sensor. The rolling mechanism includes a mounting plate, a driving device IV, and a rolling head. The rear side of the mounting plate is slidably connected to the front side of the vertical platform. The rolling head is installed at the output end of the driving device IV. The driving device I, the driving device II, the driving device III, the driving device IV, the electromagnetic floating device, and the dynamic torque sensor are all connected to the electric control device. By setting the electromagnetic floating device in cooperation with the dynamic torque sensor, the pressing rate and deformation data of the ceramic blank can be obtained. By setting and adjusting parameters in cooperation with the electric control device, reverse calculation of the ceramic blank can be realized, and dynamic pressure adjustment of the ceramic blank during the rolling process can be achieved. Moreover, compared with ordinary mechanical lifting adjustment, electromagnetic adjustment avoids hysteresis during the lifting process, and the adjustment process is more linear and rapid.

[0005] Further, the electromagnetic floating device includes a limit sleeve. A stator electromagnetic coil is fixedly installed inside the limit sleeve. A rotor electromagnetic coil is arranged above the stator electromagnetic coil. The rotor electromagnetic coil is slidably connected to the inner wall of the limit sleeve. By setting the limit sleeve to limit the lifting of the rotor electromagnetic coil, displacement and flipping of the rotor electromagnetic coil are avoided. At the same time, the lifting of the rotor electromagnetic coil can be controlled by adjusting the current of the stator electromagnetic coil.

[0006] Further, a longitudinal chute is provided on the inner wall of the limiting sleeve. The mover electromagnetic coil includes an electromagnetic coil part and a coil housing. The electromagnetic coil part is embedded and installed on the lower side of the coil housing. A slider slidably connected in the longitudinal chute is provided on the side of the coil housing. A steering platform is provided on the upper side of the coil housing. The lower part of the mold clamping device is rotatably connected to the coil housing through the steering platform. By providing the longitudinal chute, the mover electromagnetic coil is further limited to prevent the mover electromagnetic coil from rotating horizontally. At the same time, through the cooperation of the slider and the longitudinal chute, the mover electromagnetic coil moves more smoothly during the lifting process, making the dynamic adjustment more accurate.

[0007] Further, a guiding pressure ring is fixedly installed on the upper part of the limiting sleeve. The outer side of the mold clamping device is in clearance fit with the inner side of the guiding pressure ring. A spring guiding column is connected to the lower side of the guiding pressure ring. The spring guiding column is located in the longitudinal chute. A spring is sleeved on the spring guiding column. The upper end of the spring abuts against the guiding pressure ring, and the lower end of the spring abuts against the upper side of the slider. A guiding column through hole is provided on the slider. The lower end of the spring guiding column passes through the guiding column through hole and is slidably connected to the guiding column through hole. By providing the cooperation of the spring guiding column and the guiding column through hole, the offset and movement clearance of the mover electromagnetic coil during the lifting process are further reduced, improving the displacement accuracy. At the same time, the spring can suppress the instantaneous jump of the mover electromagnetic coil during the reverse movement, achieving the effects of suppression and shock absorption.

[0008] Further, at least two opposite movable chutes are provided on the inner side of the equipment box. The movable chutes are vertically longitudinally provided on the inner side of the equipment box. An activity plate is provided in the equipment box. The two ends of the activity plate are slidably connected to the movable chutes. The dynamic torque sensor is fixedly installed on the lower side of the activity plate. The driving device three is fixedly installed on the upper side of the activity plate. The output end of the driving device three passes through the activity plate and is connected to the dynamic torque sensor.

[0009] Further, a trimming and recycling device is further included. The trimming and recycling device includes a conveyor belt. The conveyor belt is arranged between the lower rolling device and the horizontal platform. A collection hopper is provided below the right end of the conveyor belt. The lower end of the collection hopper is connected to an extruder. A cutting knife located outside the mold clamping device is provided on the upper side of the equipment box. An equipment rack is further provided outside the equipment box. An air blowing device is further provided outside the equipment rack. The air blowing device includes a gas supply device and a universal hose connecting the gas supply device. The gas supply device is connected to the electronic control device. A baffle is fixedly installed behind the conveyor belt. By providing the trimming and recycling device, the trimmed ceramic blank corner materials can be recycled. By setting the extruder, it is convenient to collect and store the formed materials.

[0010] Further, a displacement sensor is embedded and installed on the outer side of the slider. The displacement sensor is connected to the electronic control device. By setting the displacement sensor, the height of the mover electromagnetic coil is positioned in real time, and more accurate displacement information is provided and fed back to the electronic control device.

[0011] Further, cooling pipes are embedded and installed in the mover electromagnetic coil and the stator electromagnetic coil. The cooling pipes are connected to a water cooling device through pipelines. By setting the water cooling device, the mover electromagnetic coil and the stator electromagnetic coil are cooled, so as to avoid the influence of temperature on the electromagnetic force of the mover electromagnetic coil and the stator electromagnetic coil.

[0012] Further, a heating device is arranged inside the rolling head. The heating device is connected to the electronic control device. By setting the heating device, the rolling head can be heated. By heating the rolling head, adhesion during the rolling process of the ceramic blank can be avoided, and at the same time, the ceramic blank is heated to a certain extent, increasing the downward deformation amount of the ceramic blank.

[0013] Further, a limiting ring is fixedly installed on the inner wall of the limiting sleeve. The limiting ring is arranged between the stator electromagnetic coil and the mover electromagnetic coil. By setting the limiting ring, collision between the mover electromagnetic coil and the mover electromagnetic coil after failure can be avoided.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Through the dynamic torque sensor, the electromagnetic floating device and the electronic control device, the deformation of the embryo body can be inversed, more precise linear pressure regulation can be realized, breakage and cracks caused by stress concentration during the rolling process of the thin blank ceramic can be avoided. At the same time, compared with the traditional mechanical lifting structure, the electromagnetic floating device reduces the height fluctuation error caused by the adjustment lag, and the pressure adjustment response speed is faster and more accurate. During the automated production process, real-time adaptive adjustment of ceramic blanks with different water contents can be realized, improving the automated production efficiency and the finished product rate of the thin blank ceramic. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the present invention;

[0017] Figure 2 is a perspective view of the inclination angle adjusting device and the rolling mechanism;

[0018] Figure 3 is a sectional view of the lower rolling device;

[0019] Figure 4 is Figure 3 the enlarged view of part A in

[0020] Figure 5 is Figure 4 the enlarged view of part B in

[0021] Figure 6 It is a sectional view of the rolling head;

[0022] Figure 7 It is a structural schematic diagram of the cutting knife.

[0023] In the figure: 1. Upper rolling device; 2. Lower rolling device; 3. Electric control device; 4. Driving device I; 5. Driving device II; 6. Transmission shaft; 7. Trimming and recycling device; 8. Equipment frame; 9. Air blowing device; 10. Displacement sensor; 11. Cooling pipe; 12. Water cooling device; 13. Heating device; 14. Graphene heating layer; 15. Temperature sensor; 16. Conductive slip ring; 21. Equipment box; 22. Mold clamping device; 23. Electromagnetic floating device; 24. Dynamic torque sensor; 25. Driving device III; 71. Conveyor belt; 72. Collection hopper; 73. Extruder; 74. Cutting knife; 75. Baffle; 91. Air supply device; 92. Universal hose; 101. Horizontal platform; 102. Vertical platform; 103. Rolling mechanism; 104. Inclination adjustment device; 1031. Mounting plate; 1032. Driving device IV; 1033. Rolling head; 1041. Bracket; 1042. Driving device V; 211. Movable chute; 212. Movable plate; 231. Limiting sleeve; 232. Stator electromagnetic coil; 233. Rotor electromagnetic coil; 234. Longitudinal chute; 235. Guide pressure ring; 236. Spring guide column; 237. Spring; 238. Limiting ring; 2331. Electromagnetic coil part; 2332. Coil housing; 2333. Slide block; 2334. Steering platform; 741. Mounting column; 742. Tool bit; 121. Cooling liquid tank; 122. Water pump. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1 - 7 shown, a ceramic blank automatic forming device includes an upper rolling device 1, a lower rolling device 2 and an electric control device 3, and the upper rolling device 1 includes a horizontal platform 101, a vertical platform 102 and a rolling mechanism 103.

[0026] The horizontal platform 101 includes a workbench, on which two linearly parallel slide rails are installed. The lower sides of both sides of the vertical platform 102 are slidably connected to the horizontal platform 101 through the linear slide rails. A driving device 1 4 is arranged on the horizontal platform 101. The driving device 1 4 is a servo motor, and the driving device 1 4 is fixedly installed between the two linear slide rails by screws. A ball screw is installed at the output end of the driving device 1 4. The screw rod of the ball screw is fixedly connected to the output end of the driving device 1 4 through a shaft connector. The nut of the ball screw is fixedly connected to the lower end of the vertical platform 102. The vertical platform 102 is driven to move along the horizontal platform 101 by the rotation of the output end of the driving device 1 4.

[0027] Two groups of vertically spaced linear slide rails are installed on the front side of the vertical platform 102. The rear side of the rolling mechanism 103 is slidably connected to the vertical platform 102 through the linear slide rails installed on the vertical platform 102. A driving device 2 5 is fixedly installed on the front side of the vertical platform 102 by screws. The driving device 2 5 is also a servo motor. The output end of the driving device 2 5 is also connected to the rear side of the rolling mechanism 103 by installing a ball screw. The rolling mechanism 103 can be driven to slide up and down along the vertical platform 102 by the driving device 2 5.

[0028] As Figure 2 shown, the rolling mechanism 103 includes a mounting plate 1031, a driving device 4 1032, and a rolling head 1033. Two linear slide rails are installed on the rear side of the mounting plate 1031. The mounting plate 1031 is slidably connected to the vertical platform 102 through the installed linear slide rails. The rolling head 1033 is fixedly installed at the output end of the driving device 4 1032 by screws or other detachable installation methods. In some embodiments, an inclination adjustment device 104 is further provided on the front side of the mounting plate 1031. The inclination adjustment device 104 includes a bracket 1041. A driving device 5 1042 is fixedly installed on the side of the bracket 1041 by screws. The output end of the driving device 5 1042 is fixedly connected to the driving device 4 1032 through a flange and screws. The inclination angle of the driving device 4 1032 is controlled by the rotation of the output end of the driving device 5 1042.

[0029] As Figure 1 and Figure 3 shown, the lower rolling device 2 is arranged below the rolling mechanism 103. The lower rolling device 2 includes an equipment box 21 and a mold clamping device 22, an electromagnetic floating device 23, a dynamic torque sensor 24, and a driving device 3 25 arranged in the equipment box 21.

[0030] The mold clamping device 22 is embedded and installed on the upper side of the equipment box 21. The mold clamping device 22 can adopt existing technologies, such as pneumatic chucks or electric claws. The mold clamping device 22 is only limited to clamping and fixing the mold, which will not be elaborated here.

[0031] As Figure 3 shown, a lower part of the mold clamping device 22 is rotatably connected with an electromagnetic floating device 23. The electromagnetic floating device 23 is fixedly connected with the equipment box 21 by screws. The electromagnetic floating device 23 can drive the mold clamping device 22 to move up and down. A lower part of the mold clamping device 22 is fixedly connected with a transmission shaft 6 through a penetrated bolt. The transmission shaft 6 is connected to an output end of a third driving device 25 through a coupling. The third driving device 25 is a servo motor. The third driving device 25 is longitudinally slidably connected with the equipment box 21. The output end of the third driving device 25 is connected with a dynamic torque sensor 24 through a coupling. The first driving device 4, the second driving device 5, the third driving device 25, the fourth driving device 1032, the fifth driving device 1042, the electromagnetic floating device 23 and the dynamic torque sensor 24 are all electrically connected to an electric control device 3.

[0032] As Figure 4 shown, in this embodiment, the electromagnetic floating device 23 includes a limiting sleeve 231. A stator electromagnetic coil 232 is embedded and installed below the inside of the limiting sleeve 231. A bottom tray is fixedly installed at a lower end of the limiting sleeve 231 by screws. The stator electromagnetic coil 232 is fixedly connected with the bottom tray by screws. An upper part of the stator electromagnetic coil 232 is provided with a rotor electromagnetic coil 233. The rotor electromagnetic coil 233 is slidably connected with an inner wall of the limiting sleeve 231.

[0033] As Figure 4 and Figure 5 shown, in this embodiment, a plurality of longitudinal chutes 234 are opened on an inner wall of the limiting sleeve 231. The longitudinal chutes 234 are dovetail chutes. The plurality of longitudinal chutes 234 are opened at equal angles. The rotor electromagnetic coil 233 includes an electromagnetic coil part 2331 and a coil housing 2332. The electromagnetic coil part 2331 is embedded and installed on a lower side of the coil housing 2332. A side of the coil housing 2332 is integrally provided with a slider 2333 slidably connected in the longitudinal chute 234. The slider 2333 is matched with the dovetail chute. An upper side of the coil housing 2332 is fixedly installed with a steering platform 2334. The steering platform 2334 adopts a hollow steering platform 2334 to facilitate the transmission shaft 6 to pass through the steering platform 2334 and the limiting sleeve 231. A lower part of the mold clamping device 22 is fixedly connected with an upper side of the steering platform 2334 by screws. At this time, the mold clamping device 22 is rotatably connected with the coil housing 2332 through the steering platform 2334.

[0034] In this embodiment, a guiding pressure ring 235 is fixedly installed on the upper part of the limiting sleeve 231 through screws. The outer side surface of the mold clamping device 22 is in clearance fit with the inner side surface of the guiding pressure ring 235. The lower side surface of the guiding pressure ring 235 is integrally connected with a spring guiding column 236. The position and quantity of the spring guiding columns 236 correspond to those of the longitudinal sliding grooves 234. The spring guiding columns 236 are located in the longitudinal sliding grooves 234. A spring 237 is sleeved on the spring guiding columns 236. The upper end of the spring 237 abuts against the guiding pressure ring 235, and the lower end of the spring 237 abuts against the upper side surface of the slider 2333. A guiding column through hole is formed in the slider 2333. The lower end of the spring guiding column 236 passes through the guiding column through hole and is in sliding connection with the guiding column through hole.

[0035] As Figure 3 shown, in this embodiment, at least two opposite movable sliding grooves 211 are formed in the inner side surface of the equipment box 21. The movable sliding grooves 211 are vertically formed in the inner side surface of the equipment box 21 in the longitudinal direction. An activity plate 212 is arranged in the equipment box 21. Both ends of the activity plate 212 are in sliding connection with the movable sliding grooves 211. The dynamic torque sensor 24 is fixedly installed on the lower side surface of the activity plate 212. The driving device three 25 is fixedly installed on the upper side surface of the activity plate 212. The output end of the driving device three 25 passes through the activity plate 212 and is connected with the dynamic torque sensor 24. In other embodiments, after the driving device three 25 and the activity plate 212 are fixedly connected by screws, the dynamic torque sensor 24 can also be directly installed on one side of the output end of the driving device three 25 and be fixedly connected with the driving device three 25 by screws.

[0036] In this embodiment, it further includes a trimming recycling device 7. The trimming recycling device 7 includes a conveyor belt 71. The conveyor belt 71 is arranged between the lower rolling device 2 and the horizontal platform 101. The conveyor belt 71 can be fixedly installed at the front end of the horizontal platform 101. A collecting hopper 72 is arranged below the right end of the conveyor belt 71. An extruder 73 is arranged below the collecting hopper 72. The extruder 73 is electrically connected to the electric control device 3. The lower end of the collecting hopper 72 is connected to the feeding port of the extruder 73. A cutter 74 is arranged on the upper side of the equipment box 21 and is located outside the mold clamping device 22. The cutter 74 includes a mounting column 741 welded on the upper side of the equipment box 21 and a cutter head 742. One end of the cutter head 742 is sleeved on the mounting column 741 and can be locked by screws. By adjusting the cutting angle of the cutter head 742, the trimming operation of ceramic blanks with various diameters can be adapted. An equipment rack 8 is further arranged outside the equipment box 21. An air blowing device 9 is arranged outside the equipment rack 8. The air blowing device 9 includes a gas supply device 91 and a universal hose 92 connected to the gas supply device 91. The gas supply device 91 is an electric air pump. The gas supply device 91 is connected to the electric control device 3. A nozzle is installed at one end of the universal hose 92 that is not connected to the gas supply device 91. The nozzle can extend to a position close to the cutter 74 through the universal hose 92. A baffle 75 is fixedly installed behind the conveyor belt 71. The lower part of the baffle 75 is fixedly connected to the horizontal platform 101 by screws.

[0037] In this embodiment, an embedding hole is formed on the outer side surface of the slider 2333. A displacement sensor 10 is installed in the embedding hole. The displacement sensor 10 is electrically connected to the electric control device 3. The displacement sensor 10 preferably adopts a laser displacement sensor with a sampling frequency greater than 1000Hz.

[0038] In this embodiment, embedding grooves are reserved on the lower side surface of the mover electromagnetic coil 233 and the upper side surface of the stator electromagnetic coil 232. The embedding grooves are arranged around the mover electromagnetic coil 233 and the stator electromagnetic coil 232. A cooling pipe 11 is embedded in the embedding grooves. The cooling pipe 11 is a hollow flat copper pipe. Water inlets and outlets are arranged on the cooling pipe 11. The water inlets and outlets on the cooling pipe 11 are connected to a water cooling device 12 through pipes. The pipes adopt rubber hoses with an external nylon protective layer. The water cooling device 12 includes a coolant tank 121 and a water pump 122. The water pump 122 is connected to the inside of the coolant tank 121. The water inlets on the cooling pipe 11 are connected to the water outlet of the water pump 122 through pipes. The water outlets on the cooling pipe 11 are connected to the inside of the coolant tank 121 through pipes.

[0039] In this embodiment, a heating device 13 is provided inside the rolling head 1033. The heating device 13 includes a graphene heating layer 14 and a temperature sensor 15 located inside the rolling head 1033. An output end of the fourth driving device 1032 is installed with a conductive slip ring 16. Both the graphene heating layer 14 and the temperature sensor 15 are connected to the conductive slip ring 16, and the conductive slip ring 16 is connected to the electronic control device 3.

[0040] In this embodiment, a limiting ring 238 is fixedly installed on an inner wall of the limiting sleeve 231. The limiting ring 238 is fixedly installed on the inner wall of the limiting sleeve 231 by screws. A height of the limiting ring 238 is located between the stator electromagnetic coil 232 and the rotor electromagnetic coil 233.

[0041] When the present invention is in operation, by collecting the current, rotational speed of the third driving device 25 and the fourth driving device 1032, and the position information of the rotor electromagnetic coil 233 obtained by the displacement sensor 10, and combining with the real-time torque information of the dynamic torque sensor 24, a rheological model of the ceramic blank is constructed, so as to invert the deformation of the embryo body. An inverse compensation algorithm is constructed by the electronic control device 3 to generate a linear compensation function. The sampling frequency of the dynamic torque sensor 24 is preferably greater than 1000 Hz. The electronic control device 3 monitors the characteristic values of each 10 Hz frequency band of the dynamic torque sensor 24 in real time. The radial deformation amount of the ceramic blank is inverted through the constructed rheological model of the ceramic blank. A threshold value of the radial deformation amount of the ceramic blank is set by the electronic control device 3. When the radial deformation amount is greater than the set threshold value of the radial deformation amount of the ceramic blank, the electronic control device 3 is started to adjust the current of the stator electromagnetic coil 232, so as to control the rotor electromagnetic coil 233 to receive and complete the lifting or lowering action within 5 ms, thereby controlling the stress during the rolling process of the ceramic blank, making the stress distribution more uniform and avoiding cracking. At the same time, the electronic control device 3 can monitor the abnormal values of the dynamic torque sensor 24 and set an abnormal torque threshold value. When the abnormal torque threshold value is reached or exceeded, the machine stops. When producing a ceramic thin blank with a thickness less than 2 mm by the present invention, the standard deviation of the surface stress of the rolling stress of the ceramic thin blank is less than 0.05 MPa, which is reduced by 80% compared with the traditional equipment, and the breakage rate is reduced from 15% to less than 0.5%. At the same time, the present invention can adapt to the differentiated pressing rate requirements of 0.1 - 5 mm / s, the production efficiency is increased to more than 120 pieces per hour, and the finished product rate is stable at more than 98.7%.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic ceramic blank forming device, characterized in that: It includes an upper rolling device, a lower rolling device and an electric control device. The upper rolling device includes a horizontal platform, a vertical platform and a rolling mechanism. The lower part of the vertical platform is slidably connected to the upper part of the horizontal platform. A driving device one is arranged on the horizontal platform, and the driving device one can drive the vertical platform to move along the horizontal platform. The rolling mechanism is slidably connected to the front side of the vertical platform. A driving device two is arranged on the vertical platform, and the driving device two can drive the rolling mechanism to slide up and down along the vertical platform. The lower rolling device is arranged below the rolling mechanism. The lower rolling device includes an equipment box and a mold clamping device, an electromagnetic floating device, a dynamic torque sensor and a driving device three inside the equipment box. The lower part of the mold clamping device is rotatably connected to the electromagnetic floating device, and the electromagnetic floating device is fixedly connected to the equipment box. The electromagnetic floating device includes a limit sleeve. A stator electromagnetic coil is fixedly installed inside the limit sleeve. An armature electromagnetic coil is arranged above the stator electromagnetic coil. The armature electromagnetic coil is slidably connected to the inner wall of the limit sleeve. A displacement sensor is installed on the armature electromagnetic coil, and the displacement sensor is connected to the electric control device. The electromagnetic floating device can drive the mold clamping device to move up and down. The lower part of the mold clamping device is connected to a transmission shaft, and the transmission shaft is connected to a driving device three. The driving device three is longitudinally slidably connected to the equipment box. The output end of the driving device three is connected to a dynamic torque sensor. The rolling mechanism includes a mounting plate, a driving device four and a rolling head. The rear side of the mounting plate is slidably connected to the front side of the vertical platform. The rolling head is installed at the output end of the driving device four. The driving device one, the driving device two, the driving device three, the driving device four, the electromagnetic floating device and the dynamic torque sensor are all connected to the electric control device. By collecting the current and rotation speed of the driving device three and the driving device four and the position information of the armature electromagnetic coil obtained by the displacement sensor, and combining the real-time torque information of the dynamic torque sensor, a rheological model of the ceramic blank is constructed. The electric control device monitors the characteristic values of the dynamic torque sensor in the frequency band within every 10 Hz in real time. The radial deformation amount of the ceramic blank body is inversely calculated through the constructed rheological model of the ceramic blank. The threshold value of the radial deformation amount of the ceramic blank body is set by the electric control device. When the radial deformation amount is greater than the set threshold value of the radial deformation amount of the ceramic blank body, the electric control device is started to adjust the current of the stator electromagnetic coil, so as to control the armature electromagnetic coil to receive and complete the lifting or lowering action within 5 ms.

2. The automatic ceramic blank forming equipment according to claim 1, characterized in that: Longitudinal chutes are provided on the inner wall of the limit sleeve. The armature electromagnetic coil includes an electromagnetic coil part and a coil housing. The electromagnetic coil part is embedded and installed on the lower side of the coil housing. A slider slidably connected in the longitudinal chute is arranged on the side of the coil housing. A steering platform is arranged on the upper side of the coil housing. The lower part of the mold clamping device is rotatably connected to the coil housing through the steering platform.

3. The automatic ceramic blank forming equipment according to claim 2, characterized in that: A guiding pressure ring is fixedly installed on the upper part of the limiting sleeve. The outer side surface of the die clamping device is in clearance fit with the inner side surface of the guiding pressure ring. A spring guiding column is connected to the lower side surface of the guiding pressure ring. The spring guiding column is located in the longitudinal sliding groove. A spring is sleeved on the spring guiding column. The upper end of the spring abuts against the guiding pressure ring, and the lower end of the spring abuts against the upper side surface of the slider. A guiding column through hole is formed in the slider. The lower end of the spring guiding column passes through the guiding column through hole and is slidably connected with the guiding column through hole.

4. The automatic ceramic blank forming equipment according to claim 1, characterized in that: At least two opposite movable sliding grooves are formed in the inner side surface of the equipment box. The movable sliding grooves are vertically formed in the inner side surface of the equipment box longitudinally. An activity plate is arranged in the equipment box. The two ends of the activity plate are slidably connected with the movable sliding grooves. The dynamic torque sensor is fixedly installed on the lower side surface of the activity plate. The driving device three is fixedly installed on the upper side surface of the activity plate. The output end of the driving device three passes through the activity plate and is connected with the dynamic torque sensor.

5. The automatic ceramic blank forming equipment according to claim 1, characterized in that: It further includes a trimming and recycling device. The trimming and recycling device includes a conveyor belt. The conveyor belt is arranged between the lower rolling device and the horizontal platform. A collecting hopper is arranged below the right end of the conveyor belt. The lower end of the collecting hopper is connected with an extruder. A cutting knife located outside the die clamping device is arranged on the upper side surface of the equipment box. An equipment rack is further arranged outside the equipment box. An air blowing device is further arranged outside the equipment rack. The air blowing device includes a gas supply device and a universal hose connecting the gas supply device. The gas supply device is connected with the electronic control device. A baffle is fixedly installed behind the conveyor belt.

6. The automatic ceramic blank forming equipment according to claim 1, characterized in that: Cooling pipes are embedded in the moving electromagnetic coil and the stator electromagnetic coil. The cooling pipes are connected with a water cooling device through pipelines.

7. The automatic ceramic blank forming equipment according to claim 1, characterized in that: A heating device is arranged inside the rolling head. The heating device is connected with the electronic control device.

8. The automatic ceramic blank forming equipment according to claim 1, characterized in that: A limiting ring is fixedly installed on the inner wall of the limiting sleeve. The limiting ring is arranged between the stator electromagnetic coil and the moving electromagnetic coil.

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