Skin grafting device and skin grafting method for silicon carbide honeycomb ceramic carrier

Abstract

According to the skin grafting device and method for the silicon carbide honeycomb ceramic carrier, high-quality and high-efficiency skin grafting of the silicon carbide honeycomb ceramic carrier can be achieved, meanwhile, dependence on manpower is reduced, the product consistency and the production efficiency are improved, and the production cost is reduced. The rotary driving assembly is used for bearing the silicon carbide honeycomb ceramic carrier and driving the silicon carbide honeycomb ceramic carrier to rotate; the top pressing assembly is used for pressing the silicon carbide honeycomb ceramic carrier from the top; the blade coating assembly is used for scraping and trimming pug coated on the surface of the silicon carbide honeycomb ceramic carrier; the skin grafting template and the floating clamping mechanism are matched to be clamped at the two ends of the silicon carbide honeycomb ceramic carrier, the skin grafting template is used for limiting the skin grafting outer diameter of the silicon carbide honeycomb ceramic carrier, and the floating clamping mechanism can conduct self-adaptive adjustment on radial run-out of the silicon carbide honeycomb ceramic carrier during rotary machining.

Description

Technical Field

[0001] This invention relates to the field of silicon carbide honeycomb ceramic carrier production technology, specifically to a skin grafting device and method for silicon carbide honeycomb ceramic carriers. Background Technology

[0002] Silicon carbide honeycomb ceramic carriers are widely used as catalyst carriers in fields such as automotive exhaust purification and industrial waste gas treatment due to their excellent high-temperature resistance, low coefficient of thermal expansion, high thermal conductivity, and good chemical stability. In the production process, silicon carbide carriers are typically formed by assembling multiple honeycomb ceramic blanks into a cuboid blank, which is then machined into a cylindrical structure. Because the material is honeycomb ceramic, the surface of the machined cylindrical blank exhibits a crisscrossing honeycomb channel structure with high surface roughness, which cannot directly meet the requirements for subsequent use. Therefore, a skinning process is required to cover the rough surface with a smooth outer skin approximately 1.2 mm thick to improve surface quality and meet the application requirements.

[0003] Currently, there are two main methods for skin grafting on silicon carbide honeycomb ceramic carriers: The first method is the traditional rotary mechanical skin grafting solution. This method uses a rigid mechanical structure to fix the carrier on a rotating spindle for skin grafting. However, due to the inherent material properties of the silicon carbide carrier, it is difficult to precisely control the parallelism of the two end faces, cylindricity, and perpendicularity of the outer circle to the end faces during the preceding shape processing stage, resulting in poor consistency in the size and shape of the blank. The traditional mechanical structure lacks flexibility, and when processing blanks with large dimensional deviations, it is prone to problems such as uneven coating, substandard surface finish, and localized defects, failing to meet the processing quality requirements.

[0004] The second method is a combination of mechanical pretreatment and manual skin grafting. The specific operation process is as follows: the worker places the carrier on a rotating table, adjusts the carrier's position based on operating experience to achieve concentricity with the rotating shaft, and clamps it in place; then the worker holds a skin grafting scraper in the left hand and a feeding shovel in the right hand, and evenly spreads the mud on the outer surface of the carrier to form the required smooth outer skin. However, this manual operation method has many drawbacks: firstly, the production efficiency is low; the product dimensional accuracy and surface quality are greatly affected by the operator's skill level, and consistency is difficult to guarantee; secondly, the manual labor intensity is high, the skills training cycle for new employees is long and the training cost is high, which seriously restricts the improvement of production capacity and quality. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a skin grafting device and method for silicon carbide honeycomb ceramic carriers, which can achieve high-quality and high-efficiency skin grafting on silicon carbide honeycomb ceramic carriers, while reducing reliance on manual labor and improving product consistency and production efficiency.

[0006] The technical solution is as follows: A skin grafting device for silicon carbide honeycomb ceramic carriers, characterized in that it includes components installed in a workbench: A rotation drive assembly for supporting and driving the silicon carbide honeycomb ceramic carrier to rotate; A top clamping assembly is disposed above the worktable for clamping the silicon carbide honeycomb ceramic carrier from the top; A positioning component is used to center and position the silicon carbide honeycomb ceramic carrier before compaction. A scraping assembly is disposed on the side of the silicon carbide honeycomb ceramic carrier. The scraping assembly includes a scraper for scraping and trimming the mud coated on the surface of the silicon carbide honeycomb ceramic carrier. The rotary drive assembly and the top clamping assembly are both equipped with floating clamping mechanisms at their contact ends with the silicon carbide honeycomb ceramic carrier. A skin graft template is provided on the floating clamping mechanism. The skin graft template cooperates with the floating clamping mechanism to clamp both ends of the silicon carbide honeycomb ceramic carrier. The skin graft template is used to limit the outer diameter of the skin graft on the silicon carbide honeycomb ceramic carrier. The floating clamping mechanism can adaptively adjust the radial runout of the silicon carbide honeycomb ceramic carrier during rotary processing.

[0007] Furthermore, the rotary drive assembly includes a spindle motor, which is disposed at the lower end of the worktable. The spindle motor is connected to the spindle via belt drive, and the spindle motor drives the silicon carbide honeycomb ceramic carrier to rotate via the spindle.

[0008] Furthermore, the main shaft is a hollow shaft, and a lifting rod is provided inside the main shaft. The lifting rod is driven by a lifting cylinder to achieve lifting movement, and a lifting disc is provided at the upper end of the lifting rod.

[0009] Furthermore, the positioning component includes a positioning cylinder and a positioning V-block. The positioning cylinder drives the positioning V-block to extend or retract, and the positioning V-block is used for concentric positioning with the outer circle of the silicon carbide honeycomb ceramic carrier as a reference.

[0010] Furthermore, the floating clamping mechanism includes an upper floating clamping mechanism installed at the lower end of the top pressing assembly and a lower floating clamping mechanism installed at the upper end of the rotary drive assembly. The lower floating clamping mechanism includes a lower cover, an upper cover, and a spherical bearing. The spherical bearing is installed between the lower cover and the upper cover, and a floating gap is left between the lower cover and the upper cover. The lower end face of the lower cover is connected to the main shaft through a bushing clearance fit to receive rotational torque. The upper cover and the lower cover are connected through a slot structure to transmit rotational torque. The upper floating clamping mechanism includes an upper floating mounting seat, in which a spherical bearing is disposed. The upper floating mounting seat is connected to the top pressing assembly.

[0011] Furthermore, an inner bearing ring end cap is provided at the upper end of the spherical bearing within the upper floating mounting base. A bearing shaft is provided in the spherical bearing. The upper skin graft template is connected to the bearing shaft by bolts. An upper template connecting flange is provided on the upper floating mounting base. The upper template connecting flange is connected to the upper floating mounting base by bolts. The top clamping assembly includes a clamping cylinder mounted on the worktable via a bracket. The end of the piston rod of the clamping cylinder is connected to the upper floating mounting base.

[0012] Furthermore, the skin graft template includes an upper skin graft template and a lower skin graft template. The lower skin graft template is clamped onto the upper cover of the lower floating clamping mechanism, and the upper skin graft template is fixed by an upper floating pressure plate mechanism. The outer diameter of the upper skin graft template and the lower skin graft template are respectively equal to the target outer diameter of the silicon carbide honeycomb ceramic carrier.

[0013] Furthermore, the coating assembly also includes: The scraper rotation mechanism includes a scraper rotation motor for driving the scraper to rotate so that the scraper fits the skin graft template; The scraper lateral movement mechanism includes a scraper lateral movement motor connected to a linear module. The scraper lateral movement motor and the linear module are mounted on a mounting bracket. The slider of the linear module is mounted on a mounting column located on the worktable. The scraper lateral movement motor can drive the scraper to move laterally to adjust the lateral position of the scraper.

[0014] Furthermore, the coating assembly also includes a scraper quick-retraction mechanism, which is mounted on the mounting bracket. The scraper quick-retraction mechanism includes a scraper quick-retraction cylinder, and the scraper is connected to the piston rod of the scraper quick-retraction cylinder. The scraper quick-retraction cylinder can retract the scraper by retracting the piston rod, which is used to drive the scraper to quickly detach from the silicon carbide honeycomb ceramic carrier at the end of the skin grafting.

[0015] Furthermore, the coating assembly also includes: A flexible contact mechanism includes a scraper connecting plate connected to a scraper rotation motor. The scraper is connected to the scraper connecting plate via a rotating shaft. An elastic cylinder is also installed on the scraper connecting plate. The piston rod of the elastic cylinder is connected to the scraper. During the skin grafting process, the elastic cylinder provides elastic support force to the scraper, enabling the scraper to make flexible contact with the silicon carbide honeycomb ceramic carrier.

[0016] A method for skin grafting on a silicon carbide honeycomb ceramic carrier, characterized by being implemented using the aforementioned skin grafting device for silicon carbide honeycomb ceramic carriers, the method comprising the following steps: Step a: Place the silicon carbide honeycomb ceramic carrier to be grafted on top of the lower graft template; Step b: The positioning cylinder drives the positioning V-block to extend, centering and positioning the silicon carbide honeycomb ceramic carrier to ensure that the silicon carbide honeycomb ceramic carrier is concentric with the main shaft; Step c: After centering and positioning are completed, the positioning V-block retracts, and the clamping cylinder drives the upper floating pressure plate mechanism to move downward, pressing and fixing the silicon carbide honeycomb ceramic carrier between the upper and lower floating clamping mechanisms. Step d: The spindle motor starts, driving the clamped silicon carbide honeycomb ceramic carrier to begin rotating; Step e: The scraper of the scraping component is moved to the preset scraping position by the scraper traverse motor, and the scraper rotation motor drives the scraper to rotate, so that the scraper accurately fits the outer diameter of the skin grafting template; Step f: Apply the clay material to the outer surface of the silicon carbide honeycomb ceramic carrier; Step g: Under the flexible action of the elastic cylinder, the scraper scrapes the mud evenly, and the mud is evenly coated on the outer surface of the carrier to form a smooth outer skin, so that the thickness of the graft layer reaches the target thickness. Step h: When the skin grafting process is completed, the scraper quick retraction cylinder quickly drives the scraper to detach from the surface of the silicon carbide honeycomb ceramic carrier; Step i: The clamping cylinder releases the clamping force on the silicon carbide honeycomb ceramic carrier, and then the lifting cylinder drives the lifting rod and lifting disc to rise, lifting the silicon carbide honeycomb ceramic carrier that has been grafted.

[0017] The skin grafting device for silicon carbide honeycomb ceramic carriers of the present invention effectively solves the coating defects caused by large dimensional deviations and insufficient mechanical flexibility of the carrier blank in traditional processes through the synergistic action of a floating clamping mechanism, a positioning component, a skin grafting template, and a scraping component. The positioning component can automatically correct the concentricity of the carrier, replacing manual experience-based positioning and avoiding accuracy fluctuations. The scraping component, in conjunction with the skin grafting template, can precisely control the skin grafting thickness, uniformly cover surface grooves, and significantly reduce problems such as uneven coating, substandard surface smoothness, and local defects. This significantly improves the surface quality, dimensional accuracy, and consistency of the product, ensuring that it meets the requirements of subsequent processes and increasing the product qualification rate. The skin grafting device for silicon carbide honeycomb ceramic carriers can replace repetitive and high-intensity manual labor, significantly reducing reliance on operator skills. New employees can be put to work after simple training, shortening the training cycle and reducing training costs. The skin grafting device for silicon carbide honeycomb ceramic carriers of the present invention, while achieving automatic skin grafting, retains the flexibility of manual operation through the setting of a flexible contact mechanism, breaking through the limitation of traditional rigid machinery that has high requirements for the consistency of blank size. The floating clamping mechanism can automatically adjust according to the blank size deviation, which can flexibly adapt to the size deviation caused by the previous processing. The skin grafting template can be replaced to improve the versatility of the equipment and the production flexibility, and reduce the switching costs when producing multiple varieties. Attached Figure Description

[0018] Figure 1 This is a first-view perspective perspective view of the skin grafting device for silicon carbide honeycomb ceramic carrier in the embodiment. Figure 2 This is a second-view perspective perspective view of the skin grafting device for silicon carbide honeycomb ceramic carrier in the embodiment. Figure 3 This is a front view of the skin grafting device for silicon carbide honeycomb ceramic carrier in the embodiment. Figure 4 This is a first-view perspective perspective view of the coating assembly for a silicon carbide honeycomb ceramic carrier in the embodiment. Figure 5 This is a second-view perspective perspective view of the coating assembly for a silicon carbide honeycomb ceramic carrier in the embodiment. Figure 6 This is a perspective view of the floating clamping mechanism and the skin graft template clamping the carrier in the embodiment. Figure 7 This is a top view of the floating clamping mechanism and the skin graft template clamping the carrier in the embodiment. Figure 8 for Figure 7 A sectional view along the AA direction. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings.

[0020] See Figure 1 , Figure 2 , Figure 3 A skin grafting device for silicon carbide honeycomb ceramic carriers, comprising: mounted on a worktable 100: Rotation drive assembly 200 is used to support the silicon carbide honeycomb ceramic carrier 1 and drive the silicon carbide honeycomb ceramic carrier 1 to rotate; The top clamping assembly 300 is disposed above the worktable 100 and is used to clamp the silicon carbide honeycomb ceramic carrier 1 from the top. Positioning component 400 is used to center and position the silicon carbide honeycomb ceramic carrier 1 before pressing. The scraping assembly 500 is disposed on the side of the silicon carbide honeycomb ceramic carrier 1. The scraping assembly includes a scraper 510 for scraping and trimming the mud coated on the surface of the silicon carbide honeycomb ceramic carrier 1. Both the rotary drive assembly 200 and the top clamping assembly 300 are equipped with floating clamping mechanisms 600 at their contact ends with the silicon carbide honeycomb ceramic carrier 1. A skin graft template 700 is provided on the floating clamping mechanism 600. The skin graft template 700 and the floating clamping mechanism 600 cooperate to clamp the two ends of the silicon carbide honeycomb ceramic carrier 1 to limit the outer diameter of the skin graft of the silicon carbide honeycomb ceramic carrier 1. The floating clamping mechanism 600 can adaptively adjust the radial runout during the rotary processing of the silicon carbide honeycomb ceramic carrier to eliminate the influence of uneven end face of the silicon carbide honeycomb ceramic carrier 1.

[0021] In this embodiment, the rotary drive assembly 200 is used to support the silicon carbide honeycomb ceramic carrier 1 and drive the silicon carbide honeycomb ceramic carrier 1 to rotate. It mainly includes a spindle motor 201 and a spindle 202. The spindle motor 201 is located at the lower end of the worktable 100 and is preferably a speed-regulating motor, capable of adjusting the rotation speed according to the requirements of the skin grafting process. In this embodiment, the spindle motor 201 is eccentrically mounted and connected to the spindle 202 via belt drive, providing power for the spindle rotation. In this embodiment, the main shaft 202 adopts a hollow shaft design, and a lifting rod 203 is installed inside the main shaft 202. The lifting rod 203 is driven by the lifting cylinder 204 to achieve lifting movement. The upper end of the lifting rod is equipped with a lifting disc 205, which can effectively support the silicon carbide honeycomb ceramic carrier 1. After the product skinning is completed, the lifting cylinder 204 drives the lifting rod 203 to move upward, and the lifting disc 205 lifts the silicon carbide honeycomb ceramic carrier 1 from the skinning template, which makes it convenient for operators to quickly remove the skinned carrier and improves production efficiency.

[0022] The upper end of the main shaft is connected to the floating clamping mechanism by means of a bushing clearance fit, which can not only ensure the effective transmission of rotational torque, but also facilitate assembly and disassembly. It is convenient to quickly change the skin grafting template when changing products. When changing products, only the upper skin grafting template 710 and the lower skin grafting template 720 need to be replaced to adapt to different specifications of silicon carbide honeycomb ceramic carriers, without the need to adjust other parts.

[0023] In this embodiment, the top pressing assembly 300 is disposed above the workbench 100 and is used to press the silicon carbide honeycomb ceramic carrier 1 from the top. The top pressing assembly 300 includes a pressing cylinder 302 mounted on the workbench 100 via a bracket 301. The end of the piston rod of the pressing cylinder 302 extends downward and is connected to an upward floating clamping mechanism 610.

[0024] See Figure 6 , Figure 7 , Figure 8In this embodiment, the floating clamping mechanism is used to solve the rotational runout problem caused by poor parallelism of the two end faces and poor perpendicularity of the end face to the outer circle of the silicon carbide honeycomb ceramic carrier 1. The floating clamping mechanism includes an upper floating clamping mechanism 610 installed at the lower end of the top pressing component and a lower floating clamping mechanism 620 installed at the upper end of the rotation drive component.

[0025] The structure of the lower floating clamping mechanism 620 is as follows: The lower floating clamping mechanism 620 mainly includes a lower cover 621, an upper cover 622, and a spherical bearing 623. The spherical bearing 623 is installed between the lower cover 621 and the upper cover 622. The spherical bearing 623 includes an inner ring and an outer ring. The inner and outer rings can swing relative to each other within a certain angle range, thereby realizing the floating adjustment function. A floating gap is left between the lower cover 621 and the upper cover 622. This floating gap is an axial gap. The existence of the floating gap allows the upper cover 622 to have a small degree of freedom of movement in the axial direction. Together with the floating function of the spherical bearing, it realizes the adaptive adjustment of the uneven end face of the carrier.

[0026] The lower end face of the lower cover 621 is connected to the main shaft via a bushing clearance fit to receive rotational torque. The lower end face of the lower cover has an inner hole 625. The lower cover rotates together with the main shaft, transmitting the rotational torque to the silicon carbide honeycomb ceramic carrier 1.

[0027] The lower cover 621 and the upper cover 622 are connected by a slot structure 624 to transmit rotational torque. Specifically, the outer circumferential surface of the lower cover has several raised slots, and the inner circumferential surface of the upper cover has corresponding slot keys. The slots are arranged axially, and the width of the slots is slightly larger than the width of the slot keys to ensure effective transmission of rotational torque while allowing the upper cover to have a certain amount of floating space in the axial direction. In this embodiment, the slot structure 624 is designed to ensure effective transmission of rotational torque while giving the lower end of the product a certain degree of floating adjustment capability.

[0028] The lower skin graft template 720 is clamped onto the upper cover of the lower floating clamping mechanism 620. The upper end face of the upper cover is provided with an annular groove. The inner diameter part of the lower skin graft template 720 is inserted into the annular groove to achieve clamping and fixing. It is easy to assemble and disassemble and facilitates quick model change.

[0029] In this embodiment, the upper floating clamping mechanism 610 includes an upper floating mounting base 611, a spherical bearing 612 is provided inside the upper floating mounting base 611, and the upper end of the upper floating mounting base 611 is connected to the piston rod of the clamping cylinder 302.

[0030] An inner ring end cap 613 is provided at the upper end of the spherical plain bearing 612 inside the upper floating mounting base 611. A bearing shaft 614 is provided in the spherical plain bearing 612. The upper skin graft template 710 is connected to the bearing shaft 614 by bolts. The bolts are countersunk bolts, and the bolt heads do not protrude from the surface of the upper skin graft template to avoid scratching the end face of the carrier.

[0031] The joint bearing inside the upper floating pressure plate mechanism 610 allows the upper skin graft template to float within a certain angle range, which can automatically adapt to the unevenness of the upper end face of the carrier. Together with the lower floating clamping mechanism 620, it can eliminate the radial runout caused by the uneven end face.

[0032] When the two ends of the silicon carbide honeycomb ceramic carrier 1 are not parallel or there is a perpendicularity error between the end face and the outer circle, during the clamping force applied by the clamping cylinder 302, the joint bearings inside the upper floating clamping mechanism 610 and the lower floating clamping mechanism 620 will automatically adjust their angles so that the upper skin graft template 710 and the lower skin graft template 720 are tightly attached to the upper end face and the lower end face of the carrier, respectively. Since the joint bearing allows swing within a certain angle range, even if the end faces are not parallel, the skin graft template can adaptively adjust to a state of being attached to the end face, avoiding local stress concentration and deformation caused by uneven end faces under rigid clamping method.

[0033] During the rotation of the carrier, due to the floating adjustment of the upper and lower floating clamping mechanisms, the rotation axis of the carrier can be automatically aligned with its own central axis. This can eliminate the deviation caused by forced alignment due to uneven end face or perpendicularity error, avoid rotational jump, ensure the stability of the outer circle of the carrier during rotation, and enable the scraper to contact the outer surface of the carrier evenly to achieve uniform coating.

[0034] In this embodiment, the skin graft template includes an upper skin graft template 710 and a lower skin graft template 720. The outer diameters of the upper skin graft template 710 and the lower skin graft template 720 are equal, both being equal to the target outer diameter of the silicon carbide honeycomb ceramic carrier 1. The lower skin graft template 720 is clamped onto the upper cover of the lower floating clamping mechanism 620. The lower skin graft template 720 has a through hole in its center to facilitate the passage of the lifting disc. The upper skin graft template 710 is fixed to the connecting plate of the upper floating pressure plate mechanism 610 by bolts.

[0035] During the skin grafting process, the scraper 510 scrapes the outer surface of the skin grafting template. The skin grafting template serves as a dimensional reference and a guide for the scraper, precisely controlling the thickness of the skin graft layer. Since the outer diameter of the skin grafting template is equal to the target size, even if there is a certain deviation in the outer diameter of the carrier blank, after skin grafting, the mud fills the gap between the outer circle of the blank and the outer circle of the skin grafting template. The outer diameter of the final product is consistent with the outer diameter of the skin grafting template, achieving the target size and realizing precise dimensional control.

[0036] When changing models, simply replace the upper and lower skin graft templates of the corresponding size according to the target outer diameter of the carrier of different specifications. No other parts need to be adjusted, making it quick and convenient.

[0037] In this embodiment, the positioning component 400 is used to center and position the silicon carbide honeycomb ceramic carrier 1 before clamping, ensuring that the outer circle of the carrier is concentric with the main shaft. The positioning component 400 includes a positioning cylinder 401, a positioning V-block 402, and a mounting base 403. The positioning cylinder 401 is fixedly installed on the worktable 100. The piston rod of the positioning cylinder 401 is connected to the mounting seat of the positioning V-block 402. The positioning V-block 402 adopts a V-groove structure. The included angle design of the V-groove of the positioning V-block conforms to the centering principle of a cylinder, which can achieve precise concentric positioning with the outer circle of the silicon carbide honeycomb ceramic carrier 1 as a reference. The positioning process is as follows: First, the positioning cylinder 401 drives the positioning V-block 402 to extend horizontally to a predetermined position, with the extension stroke determined according to the carrier diameter. Then, the operator places the silicon carbide honeycomb ceramic carrier 1 to be grafted above the lower grafting template of the floating rotary clamping mechanism. At this time, the V-groove of the positioning V-block 402 contacts the outer circular surface of the carrier, and through the geometric constraint of the V-groove, the silicon carbide honeycomb ceramic carrier 1 is automatically adjusted to a position concentric with the main shaft. Subsequently, the clamping cylinder 5 of the top clamping assembly is activated, driving the upper floating clamping mechanism to press the silicon carbide honeycomb ceramic carrier 1 downward to complete the clamping and fixing. Finally, after clamping is completed, the positioning cylinder 401 drives the positioning V-block 402 to retract to the standby position to avoid interference with the rotating carrier during the grafting process.

[0038] The positioning method of the positioning component 400 is based on the principle of geometric constraints, which has high positioning accuracy and good repeatability, fully meeting the positioning accuracy requirements of the skin grafting process, and can replace the traditional manual operation method based on experience.

[0039] See Figure 4 , Figure 5 In this embodiment, the coating assembly 500 is disposed on the side of the silicon carbide honeycomb ceramic carrier 1, and its main function is to uniformly and smoothly coat the mud onto the surface of the carrier. In this embodiment, the coating assembly 500 includes: Scraper 510 is a wear part that can be disassembled and replaced. It needs to have a certain degree of rigidity and smoothness. Its main function is to smoothly apply the mud to the carrier. The scraper rotation mechanism includes a scraper rotation motor 521, which drives the scraper 510 to rotate, so that the scraper can quickly and accurately fit onto the skin graft template and quickly return to the processing position after the skin graft is completed. The precise position control of the scraper rotation motor 521 ensures that the scraper can accurately reach the working position every time.

[0040] The scraper lateral movement mechanism includes a scraper lateral movement motor 531, which is connected to a linear module 532. The scraper lateral movement motor 531 and the linear module 532 are mounted on a mounting bracket 533. The slider of the linear module is mounted on a mounting column 101 located on the worktable 100. The scraper lateral movement motor 531 can drive the scraper 510 to move laterally, making it easier for the scraper 510 to find the most suitable position for scraping mud and ensuring that the mud is applied evenly.

[0041] The scraper quick-retraction mechanism, installed on the mounting bracket 533, includes a scraper quick-retraction cylinder 541. The scraper 510 is connected to the piston rod of the scraper quick-retraction cylinder 541. After the skin grafting is completed, the scraper quick-retraction cylinder 541 can quickly retract the piston rod, driving the scraper 510 to detach from the silicon carbide honeycomb ceramic carrier 1, ensuring that no excess mud is left at the skin grafting closure, forming a smooth and flat closure. The scraper quick-retraction mechanism solves the problem of difficult quality control at the closure in traditional skin grafting processes and can improve the surface quality of the product.

[0042] The flexible contact mechanism includes a scraper connecting plate 551, which is connected to a scraper rotation motor 521. The scraper 510 is connected to the scraper connecting plate 551 via a rotating shaft. An elastic cylinder 552 is also installed on the scraper connecting plate 551. The piston rod of the elastic cylinder 552 is connected to the scraper 510. The cylinder thrust acts on the back of the scraper 510, causing the scraper 510 to press against the carrier surface and the mud with a certain pressure. Due to the compressibility of the gas inside the elastic cylinder 552, when the scraper encounters a local protrusion or mud accumulation on the carrier surface, the elastic cylinder 552 can automatically retract, achieving flexible clearance. When encountering a depression on the carrier surface or insufficient mud, the cylinder can automatically extend to maintain the contact pressure between the scraper and the surface. The flexible contact method of the flexible contact mechanism simulates the flexible adjustment action of the wrist during manual operation, which can ensure effective scraping force and avoid surface damage or mud accumulation that may be caused by rigid contact, thus ensuring the quality of skin grafting. The elastic cylinder 552 controls the cylinder thrust by adjusting the air pressure, providing a flexible grafting force to the scraper 510 during the grafting process, so that the scraper 510 can make flexible contact with the surface of the silicon carbide honeycomb ceramic carrier 1, ensuring better grafting quality.

[0043] The various mechanisms of the coating assembly work together to achieve automated, flexible skin grafting. The lateral movement motor drives the scraper to move to the initial scraping position, while the rotary motor drives the scraper to rotate, ensuring it adheres to the grafting template. The main shaft motor drives the silicon carbide honeycomb ceramic carrier to rotate, while the operator or automatic feeding device applies the slurry to the carrier surface. Under the flexible action of the elastic cylinder, the scraper applies appropriate pressure to smooth the slurry, creating a smooth surface. The lateral movement motor adjusts the scraper's lateral position as needed to achieve uniform slurry distribution. After the carrier rotates several times, the grafting is essentially complete. The quick-retraction cylinder rapidly retracts the scraper, creating a smooth finish. The rotary motor then drives the scraper back to the standby position.

[0044] Based on the skin grafting device for silicon carbide honeycomb ceramic carriers in the above embodiments, the present invention provides a skin grafting method for silicon carbide honeycomb ceramic carriers, comprising the following steps: Step a: The operator places the silicon carbide honeycomb ceramic carrier to be grafted on top of the lower grafting template; Step b: The positioning cylinder drives the positioning V-block to extend, centering and positioning the silicon carbide honeycomb ceramic carrier to ensure that the silicon carbide honeycomb ceramic carrier is concentric with the main shaft; Step c: After centering and positioning are completed, the positioning V-block retracts, and the clamping cylinder drives the upper floating pressure plate mechanism to move downward, pressing and fixing the silicon carbide honeycomb ceramic carrier between the upper and lower floating clamping mechanisms. Step d: The spindle motor starts, driving the clamped silicon carbide honeycomb ceramic carrier to begin rotating; Step e: The scraper of the scraping component is moved to the preset scraping position by the scraper traverse motor, and the scraper rotation motor drives the scraper to rotate, so that the scraper accurately fits the outer diameter of the skin grafting template; Step f: Workers or automatic feeding devices apply the slurry to the outer surface of the silicon carbide honeycomb ceramic carrier; Step g: Under the flexible action of the elastic cylinder, the scraper scrapes the mud with appropriate pressure, and the mud is evenly coated on the outer surface of the carrier, filling the grooves on the surface of the honeycomb ceramic to form a smooth outer skin. The scraper lateral movement motor dynamically adjusts the lateral position of the scraper according to the program or sensor feedback to ensure that the mud is evenly distributed. The carrier rotates several times so that the thickness of the skin layer gradually reaches the target thickness. Step h: When the skin grafting process is completed, the scraper quick retraction cylinder quickly drives the scraper to quickly detach from the surface of the silicon carbide honeycomb ceramic carrier, ensuring a smooth and flat finish at the end of the skin grafting and avoiding the accumulation of excess mud. Step i: The clamping cylinder releases the clamping force on the silicon carbide honeycomb ceramic carrier. Then, the lifting cylinder drives the internal lifting rod and the top lifting disc to rise, lifting the silicon carbide honeycomb ceramic carrier after skin grafting, making it easier for the operator to remove the silicon carbide honeycomb ceramic carrier.

[0045] This invention utilizes floating clamping mechanisms at the contact ends of the rotary drive assembly and the top clamping assembly, employing spherical bearings to achieve small-amplitude floating adjustments at both ends of the carrier. When the silicon carbide honeycomb ceramic carrier has non-parallel end faces or poor perpendicularity between the end face and the outer circle, the floating clamping mechanism can automatically adapt to the unevenness of the end faces, allowing the carrier to automatically align itself during rotation and eliminating radial runout caused by uneven end faces. The floating clamping mechanism overcomes the limitations of traditional rigid clamping methods, ensuring the stability of the carrier during rotary processing, enabling the scraper to uniformly contact the carrier surface, avoiding problems such as uneven coating thickness and local defects, and significantly improving the quality of skin grafting.

[0046] This invention uses a positioning V-block to center and position the carrier by using the outer circle of the carrier as a reference. The V-block is extended and retracted by a positioning cylinder to achieve rapid concentric positioning of the carrier and the main shaft. The positioning method of the positioning component is based on the principle of geometric constraint, which has high positioning accuracy and good repeatability. It can completely replace the traditional manual operation method of adjusting the carrier position based on experience, eliminate human error, and ensure the positioning consistency of each product.

[0047] This invention features a skin grafting template mounted on a floating clamping mechanism. The outer diameter of the skin grafting template is equal to the target outer diameter of the silicon carbide honeycomb ceramic carrier. During the skin grafting process, a scraper closely adheres to the outer diameter of the skin grafting template for coating. The skin grafting template serves as both a dimensional reference and a scraper guide, precisely controlling the thickness of the skin graft layer and ensuring the consistency and accuracy of the product's outer diameter. The skin grafting template ensures that even if there are certain dimensional deviations in the carrier blank, the outer diameter of the final skin-grafted silicon carbide honeycomb ceramic carrier product can still meet a uniform standard, significantly improving the product qualification rate.

[0048] The scraping assembly of this invention integrates a scraper rotation mechanism, a scraper lateral movement mechanism, and a scraper quick retraction mechanism. It allows for scraper adjustment in three dimensions: rotation angle, lateral position, and radial advance / retreat. The scraper rotation motor precisely controls the scraper's rotation angle, enabling the scraper to quickly and accurately adhere to or detach from the grafting template. The scraper lateral movement motor drives the scraper to move laterally, finding the most suitable scraping posture. The scraper quick retraction cylinder quickly drives the scraper to detach from the carrier at the end of the grafting process, forming a smooth and even finish, avoiding mud accumulation or seam marks at the finish. This scraping assembly allows the device to adapt to different carrier sizes and complex processing conditions, improving the equipment's versatility and processing flexibility. The scraping assembly also includes a flexible contact mechanism, which provides adjustable elastic support force to the scraper via an elastic cylinder. The air pressure of the elastic cylinder can be adjusted according to the characteristics of the mud and the surface condition of the carrier, allowing the scraper to flexibly contact the carrier surface with appropriate pressure. This effectively smooths the mud and fills surface grooves while avoiding surface damage or mud accumulation that may occur with rigid contact. The skinning device for silicon carbide honeycomb ceramic carriers of this invention automates the entire process from carrier positioning, clamping, rotation, scraping to unloading. The main shaft motor drives the carrier to rotate continuously, the scraping component automatically completes the mud scraping, and the lifting rod automatically lifts the product after skinning for easy removal. The entire processing cycle is significantly shortened. Compared with manual skinning, the processing time per piece can be reduced by more than 50%, improving production efficiency. The skinning device for silicon carbide honeycomb ceramic carriers of this invention can replace traditional manual skinning operations. Operators only need to place the carrier in place and simply monitor the equipment's operating status. No long-term training is required before starting work, shortening the training cycle for new employees and significantly reducing personnel training costs. At the same time, product quality no longer depends on the operator's skill level and experience accumulation, avoiding quality fluctuations caused by personnel turnover and ensuring the stability and sustainability of production.

[0049] In addition, the lower and upper skin graft templates of the present invention are fixed by clips or bolts. When changing the type, only the upper and lower skin graft templates of the corresponding specifications need to be replaced to adapt to carrier products with different outer diameters, without the need to adjust other complex parts.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A skin grafting device for silicon carbide honeycomb ceramic carriers, characterized in that, Including those installed on the workbench: A rotation drive assembly for supporting and driving the silicon carbide honeycomb ceramic carrier to rotate; A top clamping assembly is disposed above the worktable for clamping the silicon carbide honeycomb ceramic carrier from the top; A positioning component is used to center and position the silicon carbide honeycomb ceramic carrier before compaction. A scraping assembly is disposed on the side of the silicon carbide honeycomb ceramic carrier. The scraping assembly includes a scraper for scraping and trimming the mud coated on the surface of the silicon carbide honeycomb ceramic carrier. The rotary drive assembly and the top clamping assembly are respectively provided with floating clamping mechanisms at their contact ends with the silicon carbide honeycomb ceramic carrier. The floating clamping mechanism is provided with a skin graft template. The skin graft template cooperates with the floating clamping mechanism to clamp the two ends of the silicon carbide honeycomb ceramic carrier. The skin graft template is used to limit the outer diameter of the skin graft on the silicon carbide honeycomb ceramic carrier. The floating clamping mechanism can adaptively adjust the radial runout of the silicon carbide honeycomb ceramic carrier during rotary processing.

2. The skin grafting device for silicon carbide honeycomb ceramic carrier according to claim 1, characterized in that: The rotary drive assembly includes a spindle motor, which is located at the lower end of the worktable. The spindle motor is connected to the spindle via belt drive, and the spindle motor drives the silicon carbide honeycomb ceramic carrier to rotate through the spindle.

3. The skin grafting device for silicon carbide honeycomb ceramic carrier according to claim 2, characterized in that: The main shaft is a hollow shaft, and a lifting rod is installed inside the main shaft. The lifting rod is driven by a lifting cylinder to achieve lifting movement, and a lifting disc is installed at the upper end of the lifting rod.

4. The skin grafting device for silicon carbide honeycomb ceramic carrier according to claim 1, characterized in that: The positioning component includes a positioning cylinder and a positioning V-block. The positioning cylinder drives the positioning V-block to extend or retract. The positioning V-block is used for concentric positioning with the outer circle of the silicon carbide honeycomb ceramic carrier as a reference.

5. The skin grafting device for a silicon carbide honeycomb ceramic carrier according to claim 2, characterized in that: The floating clamping mechanism includes an upper floating clamping mechanism installed at the lower end of the top pressing assembly and a lower floating clamping mechanism installed at the upper end of the rotary drive assembly. The lower floating clamping mechanism includes a lower cover, an upper cover, and a spherical bearing. The spherical bearing is installed between the lower cover and the upper cover, and a floating gap is left between the lower cover and the upper cover. The lower end face of the lower cover is connected to the main shaft through a bushing to receive rotational torque. The upper cover and the lower cover are connected through a slot structure to transmit rotational torque. The upper floating clamping mechanism includes an upper floating mounting base, in which a spherical bearing is disposed. The upper floating mounting base is connected to the top pressing assembly.

6. The skin grafting device for silicon carbide honeycomb ceramic carrier according to claim 5, characterized in that: The skin graft template includes an upper skin graft template and a lower skin graft template. The lower skin graft template is clamped onto the upper cover of the lower floating clamping mechanism. The upper skin graft template is fixed by an upper floating pressure plate mechanism. The outer diameter of the upper skin graft template and the lower skin graft template are respectively equal to the target outer diameter of the silicon carbide honeycomb ceramic carrier.

7. The skin grafting device for a silicon carbide honeycomb ceramic carrier according to claim 6, characterized in that: An inner ring end cap for the bearing is provided at the upper end of the spherical bearing within the upper floating mounting base. A bearing shaft is provided in the spherical bearing. The upper skin graft template is connected to the bearing shaft by bolts. An upper template connecting flange is provided on the upper floating mounting base. The upper template connecting flange is connected to the upper floating mounting base by bolts. The top clamping assembly includes a clamping cylinder mounted on the worktable via a bracket. The end of the piston rod of the clamping cylinder is connected to the upper floating mounting base.

8. The skin grafting device for silicon carbide honeycomb ceramic carrier according to claim 1, characterized in that: The coating assembly also includes: The scraper rotation mechanism includes a scraper rotation motor for driving the scraper to rotate, so that the scraper fits the skin graft template; The scraper lateral movement mechanism includes a scraper lateral movement motor, which is connected to a linear module. The scraper lateral movement motor and the linear module are mounted on a mounting bracket. The slider of the linear module is mounted on a mounting column located on the worktable. The scraper lateral movement motor can drive the scraper to move laterally to adjust the lateral position of the scraper. A quick-release scraper mechanism is mounted on the mounting bracket. The quick-release scraper mechanism includes a quick-release scraper cylinder. The piston rod of the quick-release scraper cylinder is connected to the scraper rotation mechanism. The quick-release scraper cylinder can retract the scraper by retracting the piston rod, which is used to drive the scraper to quickly detach from the silicon carbide honeycomb ceramic carrier at the end of the skin grafting.

9. A skin grafting device for a silicon carbide honeycomb ceramic carrier according to claim 8, characterized in that: The coating assembly also includes: A flexible contact mechanism includes a scraper connecting plate connected to a scraper rotation motor. The scraper is connected to the scraper connecting plate via a rotating shaft. An elastic cylinder is also installed on the scraper connecting plate. The piston rod of the elastic cylinder is connected to the scraper. During the skin grafting process, the elastic cylinder provides elastic support force to the scraper, enabling the scraper to make flexible contact with the silicon carbide honeycomb ceramic carrier.

10. A method for skin grafting on a silicon carbide honeycomb ceramic carrier, characterized in that, The method, based on the skin grafting device for silicon carbide honeycomb ceramic carriers according to any one of claims 1 to 9, comprises the following steps: Step a: Place the silicon carbide honeycomb ceramic carrier to be grafted on top of the lower graft template; Step b: The positioning cylinder drives the positioning V-block to extend, centering and positioning the silicon carbide honeycomb ceramic carrier to ensure that the silicon carbide honeycomb ceramic carrier is concentric with the main shaft; Step c: After centering and positioning are completed, the positioning V-block retracts, and the clamping cylinder drives the upper floating pressure plate mechanism to move downward, pressing and fixing the silicon carbide honeycomb ceramic carrier between the upper and lower floating clamping mechanisms. Step d: The spindle motor starts, driving the clamped silicon carbide honeycomb ceramic carrier to begin rotating; Step e: The scraper of the scraping component is moved to the preset scraping position by the scraper traverse motor, and the scraper rotation motor drives the scraper to rotate, so that the scraper accurately fits the outer diameter of the skin grafting template; Step f: Apply the clay material to the outer surface of the silicon carbide honeycomb ceramic carrier; Step g: Under the flexible action of the elastic cylinder, the scraper scrapes the mud evenly, and the mud is evenly coated on the outer surface of the carrier to form a smooth outer skin, so that the thickness of the graft layer reaches the target thickness. Step h: When the skin grafting process is completed, the scraper quick retraction cylinder quickly drives the scraper to detach from the surface of the silicon carbide honeycomb ceramic carrier; Step i: The clamping cylinder releases the clamping force on the silicon carbide honeycomb ceramic carrier, and then the lifting cylinder drives the lifting rod and lifting disc to rise, lifting the silicon carbide honeycomb ceramic carrier that has been grafted.

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