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CN-117901541-B - High-precision curved surface transfer printing device and method

CN117901541BCN 117901541 BCN117901541 BCN 117901541BCN-117901541-B

Abstract

The invention relates to the field of curved surface transfer printing, in particular to a high-precision curved surface transfer printing device and method. The device comprises a mechanical part and an upper computer part, wherein the mechanical part comprises a bearing frame module, a motion control module, an electric cylinder motion module, a module motion module, a scraping module, a rubber head centering module and an alignment module. Firstly, modeling simulation and experiments are combined in simulation software by using a conformal algorithm, so that the position mapping relation between a plane and a curved surface under deformation of a rubber head is obtained, a required pattern is obtained through calculation, then the pattern is prepared on a notch board, high-precision alignment is carried out by using an alignment rod and an alignment board, and then the plane pattern on the notch board is picked up by using a flexible rubber head and released onto the curved surface, so that high-precision and high-efficiency transfer of the curved surface pattern is realized, and meanwhile, the flexibility of transfer equipment is improved.

Inventors

  • LIANG JUNSHENG
  • ZHANG YU
  • SUN LUJING

Assignees

  • 大连理工大学

Dates

Publication Date
20260508
Application Date
20240219

Claims (7)

  1. 1. The high-precision curved surface transfer printing method is characterized by being realized by a high-precision curved surface transfer printing device, wherein the high-precision curved surface transfer printing device comprises a mechanical part and an upper computer part, and the mechanical part comprises a bearing frame module (1), a motion control module (2), an electric cylinder motion module (3), a module motion module (4), a scraping module (5), a rubber head centering module (6) and an alignment module (7); the bearing frame module (1) comprises a support frame (1-1) and an optical bread board (1-2), wherein the support frame (1-1) is a base, the top surface of the support frame is provided with the optical bread board (1-2) with a through hole, a motion control module (2) is arranged in the bearing frame module (1), and an electric cylinder motion module (3), a module motion module (4) and a scraping module (5) are arranged on the upper surface of the bearing frame module (1); The motion control module (2) comprises a bottom plate (2-1), a module driver (2-2), an electric cylinder driver (2-3), a motion controller (2-4), an analog-to-digital conversion module (2-5), a weighing transmitter (2-6), a direct-current switching power supply A (2-7) and a direct-current switching power supply B (2-8), wherein the bottom of the bottom plate (2-1) is connected with the support frame (1-1), the module driver (2-2), the electric cylinder driver (2-3), the motion controller (2-4), the analog-to-digital conversion module (2-5), the weighing transmitter (2-6), the direct-current switching power supply A (2-7) and the direct-current switching power supply B (2-8) are arranged on the top of the bottom plate (2-1), the direct-current switching power supply A (2-7) provides voltage for the electric cylinder driver (2-3), the direct-current switching power supply B (2-8) is the module driver (2-2), the motion controller (2-4), the analog-to-digital conversion module (2-5), the weighing system comprises a weighing transmitter (2-6), a module driver (2-2) for driving a module (4-2), an electric cylinder driver (2-3) for driving an electric cylinder (3-8), a motion controller (2-4) for sending driving signals to the module driver (2-2) and the electric cylinder driver (2-3), an analog-to-digital conversion module (2-5) for converting analog signals of the weighing transmitter (2-6) into digital signals, and the weighing transmitter (2-6) for converting pressure born by a weighing sensor (3-9) into analog signals; The electric cylinder movement module (3) comprises a door-shaped supporting and reinforcing frame, an electric cylinder (3-8) and a weighing sensor (3-9), the electric cylinder (3-8) passes through the top end of the door-shaped supporting and reinforcing frame and is installed on the door-shaped supporting and reinforcing frame through a flange, the weighing sensor (3-9) is installed on the external screw thread of a push rod of the electric cylinder (3-8) through a threaded hole and is used for measuring the output thrust of the electric cylinder (3-8) during working, the module movement module (4) comprises two module cushion blocks (4-1), two modules (4-2), a engraving plate mounting plate (4-3) and an engraving plate (4-4), the two module cushion blocks (4-1) are installed above the optical bread board (1-2) in parallel, the distance between the two module cushion blocks (4-2) is fixed, the engraving plate mounting plate (4-3) is installed on a sliding platform of the module (4-2), the engraving plate (4-4) is installed on two sides of the engraving plate mounting plate (4-3) and provided with patterns, and the patterns are arranged on two sides of the engraving plate mounting plate and provided with the patterns, and the pattern is contacted with the pick-up head (6) at the pick-up head (6) through the pick-up head, the pin holes are used for accurately positioning the engraving plate (4-4) on the engraving plate mounting plate (4-3); the scraping module (5) comprises supporting rods (5-1), an oil cup fixing plate (5-2) and an oil cup (5-3), wherein the bottom end of the supporting rod (5-1) is arranged above the optical bread board (1-2), the oil cup fixing plate (5-2) is arranged at the top ends of the four supporting rods (5-1) through holes, the through holes in the middle of the oil cup fixing plate (5-2) are used for fixing the position of the oil cup (5-3), and the oil cup (5-3) is sleeved in the round through hole in the middle of the oil cup fixing plate (5-2) and is positioned above the engraving plate (4-4); The glue head centering module (6) comprises a glue head (6-1), a glue head fixing plate (6-2), a centering clamp A (6-3), a centering clamp B (6-4) and a glue head seat (6-5), wherein the glue head (6-1) is fixed on the glue head fixing plate (6-2) through a die when solidified by fluid, and has high geometric precision after pattern transfer after the surface of a workpiece (7-3) is ensured through self accurate deformation when picking up and releasing, the centering clamp A (6-3) is positioned below the glue head fixing plate (6-2), the glue head (6-1) passes through a middle round through hole of the centering clamp A (6-3), the step surface of the centering clamp B (6-4) is arranged on the upper surface of the centering clamp A (6-3), the middle round through hole at the top end of the centering clamp B (6-4) is used for threading out the glue head seat (6-5), and the glue head seat (6-5) is arranged above the glue head fixing plate (6-2) through a self-screw, and the other end of the glue head seat (6-5) is arranged below the electric motion module (3) through threaded connection; The alignment module (7) comprises a workpiece mounting table (7-1), a workpiece alignment plate (7-2), a workpiece (7-3), a notch plate mounting plate (4-3), two alignment rods (7-4) and an electric cylinder alignment plate (7-5), wherein the workpiece mounting table (7-1) is mounted above the optical bread board (1-2) through a specially-manufactured threaded through hole on the optical bread board (1-2), a middle through hole of the workpiece alignment plate (7-2) is used for determining the position of the workpiece (7-3), the workpiece (7-3) is mounted on the workpiece mounting table (7-1) after alignment, the notch plate mounting plate (4-3) is mounted on a sliding platform of the module (4-2), the electric cylinder alignment plate (7-5) is mounted on the lower surface of a front flange of the electric cylinder (3-8), and pin holes on two sides are used for accurately positioning the electric cylinder alignment plate (7-5) and the electric cylinder (3-8); The upper computer part is connected with a motion controller (2-4); The method comprises the following steps: step 1, building a superelastic constitutive model of a rubber head (6-1) material in simulation software, and performing simulation in two processes of plane pickup and curved surface release; step 2, analyzing the displacement trend of the surface of the rubber head (6-1) on a plane and a curved surface in the simulation process, and designing a corresponding two-dimensional pattern (4-4 a) according to the displacement trend; step 3, preparing a designed planar pattern and performing experiments to obtain experimental data of a three-dimensional pattern (7-3 c), and measuring a data displacement gradient of the two-dimensional pattern (4-4 a) transferred to the three-dimensional pattern (7-3 c) in the experiments; Step 4, obtaining a position mapping relation between a plane and a curved surface of the rubber head (6-1) under deformation according to the obtained displacement gradient; step 5, calculating to obtain two-dimensional pattern (4-4 a) data corresponding to the three-dimensional pattern (7-3 c) through the obtained position mapping relation between the plane and the curved surface; step 6, preparing the two-dimensional pattern (4-4 a) on the engraving plate (4-4) according to the obtained pattern data; Step 7, placing a workpiece (7-3) on the workpiece mounting table (7-1), and sleeving a central round through hole of the workpiece centering plate (7-2) on the workpiece (7-3); Step 8, mounting a notch board mounting plate (4-3) on a sliding platform of the module (4-2), wherein the notch board mounting plate and the sliding platform have a certain relative movement range; Step 9, adjusting positions of the engraving plate mounting plate (4-3) and the workpiece centering plate (7-2) to enable the two alignment rods (7-4) to penetrate through two through holes in the electric cylinder centering plate (7-5), the engraving plate mounting plate (4-3) and the workpiece centering plate (7-2) from top to bottom; Step 10, fixing a engraving plate mounting plate (4-3) and a sliding platform of the module (4-2), and positioning and mounting the engraving plate (4-4) on the engraving plate mounting plate (4-3) through pins; step 11, fixing a workpiece (7-3) on a workpiece mounting table (7-1), fixing the workpiece mounting table and the workpiece mounting table in relative positions, and removing the workpiece alignment plate (7-2) and the two alignment rods (7-4); Step 12, mounting the rubber head centering module (6) below the electric cylinder movement module (3), and completing high-precision positioning alignment of patterns on the rubber head (6-1) and the engraving plate (4-4) and the workpiece (7-3); step 13, after the pattern on the engraving plate (4-4) is driven to move to the position below the oil cup (5-3) by the movement of the module (4-2), after the oil cup (5-3) supplements the pattern with printing ink, the pattern is moved back to the corresponding position below the rubber head (6-1) by the movement of the module (4-2); Step 14, the electric cylinder (3-8) moves to enable the glue head (6-1) to pick up the pattern on the engraving plate (4-4) and then return to the original position; step 15, the module (4-2) moves to drive the pattern on the engraving plate (4-4) to return to the lower part of the oil cup (5-3) again; and step 16, the electric cylinder (3-8) moves to enable the pattern picked up by the rubber head (6-1) to be released to the surface of the workpiece (7-3) and then returned to the original position.
  2. 2. The high-precision curved surface transfer printing method according to claim 1, wherein the precise deformation of the rubber head (6-1) in two stages of picking up and releasing is realized by carrying out a material mechanical test, namely a material tensile test and a material compression test to obtain deformation experimental data of the rubber head (6-1), fitting an image by the obtained experimental data, establishing a superelastic constitutive model of the rubber head (6-1) by the obtained fitting image, and finally carrying out simulation to obtain the precise deformation required by different patterns, so as to realize the transfer printing of the different patterns from a plane to a special-shaped curved surface.
  3. 3. The high-precision curved surface transfer printing method according to claim 1, wherein the centering clamp A (6-3) and the centering clamp B (6-4) are precisely positioned through pin holes, and central round through holes of the centering clamp A (6-3) and the centering clamp B (6-4) are used for guaranteeing the position precision between the rubber head (6-1) and the rubber head seat (6-5).
  4. 4. The high-precision curved surface transfer printing method according to claim 1, wherein the pattern on the engraving plate (4-4) is obtained by a conformal algorithm, three-dimensional pattern data formed after transfer printing on the workpiece (7-3) are utilized to obtain two-dimensional pattern data corresponding to the three-dimensional pattern data, and then the pattern is prepared on the engraving plate (4-4), in this way, the pattern data on the corresponding engraving plate (4-4) can be obtained according to different workpiece (7-3) surfaces and patterns required after transfer printing, and the pattern data on the engraving plate (4-4) can be prepared, and rapid replacement and use of the pattern on the engraving plate (4-4) can be realized through standard threaded holes.
  5. 5. The high-precision curved surface transfer printing method according to claim 1, wherein the ink cup (5-3) comprises a cup body, a magnet and a knife ring, the cup body is sleeved in a circular through hole in the middle of the ink cup fixing plate (5-2), the cup body is used for storing ink, the ink is replenished to the pattern when the pattern on the engraving plate (4-4) moves to the position below the ink cup (5-3), the magnet is arranged in the cup body, the magnet is used for adsorbing the ink cup (5-3) to the engraving plate (4-4), the knife ring is arranged below the cup body and is contacted with the engraving plate (4-4), and the knife ring is used for scraping off the excessive ink on the pattern when the pattern on the engraving plate (4-4) moves out of the cup body of the ink cup (5-3).
  6. 6. The high-precision curved surface transfer printing method according to claim 1, wherein two circular through holes are respectively formed at two ends of the electric cylinder centering plate (7-5), the engraving plate mounting plate (4-3) and the workpiece centering plate (7-2), clearance fit is formed between the two alignment rods (7-4), when the two alignment rods (7-4) respectively pass through the two circular through holes in the electric cylinder centering plate (7-5), the engraving plate mounting plate (4-3) and the workpiece centering plate (7-2), namely, when the two through holes in the electric cylinder centering plate (7-5), the engraving plate mounting plate (4-3) and the workpiece centering plate (7-2) are overlapped in the vertical direction, the glue head (6-1) and the engraving plate (4-4) are respectively mounted on the electric cylinder (3-8) and the engraving plate mounting plate (4-3), and then the pattern on the glue head (6-1) and the engraving plate (4-4) are aligned with the workpiece (7-3) in a high-precision positioning mode.
  7. 7. The high-precision curved surface transfer printing method according to claim 1, wherein the supporting reinforcement frame comprises two supporting plates (3-1), two lower reinforcement plates (3-2), two left reinforcement plates (3-3), two middle reinforcement plates (3-4), two right reinforcement plates (3-5), four upper reinforcement plates (3-6) and a cross beam (3-7), the supporting plates (3-1) and the lower reinforcement plates (3-2) are respectively arranged above the optical bread plate (1-2) through threaded through holes on the optical bread plate (1-2), the two left reinforcement plates (3-3), the two middle reinforcement plates (3-4) and the two right reinforcement plates (3-5) are respectively and symmetrically arranged on the inner sides of the two supporting plates (3-1) in sequence, the cross beam (3-7) is arranged above the two supporting plates (3-1) for increasing the stability of the supporting plates (3-1), the four upper reinforcement plates (3-6) are respectively arranged on the lower surfaces of the cross beam (3-7) and are respectively arranged on the two supporting plates (3-1) and the two supporting plates (3-7) for fixing the two supporting plates (3-1).

Description

High-precision curved surface transfer printing device and method Technical Field The invention relates to the field of curved surface transfer printing, in particular to a high-precision curved surface transfer printing device and method. Background Transfer techniques are a technique for assembling transfer object materials from a donor substrate to an acceptor substrate, the basic operation of which involves two stages, pick-up and release. The device is released from the source substrate using a stamp during a pick-up phase and released onto the flexible/curved target substrate surface during a release phase. In pattern transfer, a pattern may be first created on a planar substrate and then transferred from the planar substrate to a curved surface by a transfer technique. Transfer techniques have great potential in the field of curved pattern preparation, but it still faces many challenges. The most urgent problem to be solved is how to transfer a pattern from a flat surface to a curved surface with high accuracy and high efficiency. Chinese patent CN202310750819.9 "a curved surface transfer device and method suitable for flexible electronic devices". The curved surface transfer device suitable for the flexible electronic device is provided, and the contact pin air pressure and the ranging sensor densely distributed in the array are controlled so as to realize the adsorption and the deformation of the flexible electronic device, effectively reduce the damage to the flexible electronic device and realize the nondestructive transfer. But the apparatus is limited in transfer on a curved surface of large curvature. Chinese patent No. CN202010534781.8 "curved surface transfer device and curved surface transfer method of flexible electronic device". A curved surface transfer device and a curved surface transfer method of a flexible electronic device are provided. The transfer printing device drives the curved surface part to enter and exit the cavity through the push-pull part, and when the curved surface part enters the cavity, the elastic film is deformed to press the flexible electronic device to the curved surface part, so that the flexible electronic device is attached to the curved surface part, the transfer printing repeatability is good due to mechanical operation, and the elastic film is uniformly applied to be favorable for attaching the flexible electronic device tightly. Although higher curved surface positioning accuracy can be obtained in this way, the flexible electronic device is pressed to the curved surface part by the deformation of the elastic film, so that higher geometric accuracy of the flexible electronic device on the surface of the target substrate after transfer printing cannot be ensured. Chinese patent CN201610535950.3 "a thin film transfer device and method based on thermally degradable flexible stamp". A thin film transfer apparatus and method based on a thermally degradable flexible stamp is described, which uses poly alpha-methyl styrene polymer loaded on a heating plate as a transfer stamp, thermally degrades the polymer by global heating, and peels a thin film or a device functional layer on the flexible stamp to a target substrate in an easy and controllable manner, thereby selectively transferring functional units to the target substrate. The invention is suitable for the preparation of large-scale inorganic flexible extensible electronic devices with automatic control, but reduces the efficiency and has poor adaptability by a heating degradation mode. Disclosure of Invention The invention aims to overcome the defects in the prior art and provides a high-precision curved surface transfer printing device and a method. The invention aims to solve the problems of poor positioning precision and geometric precision, low efficiency, poor adaptability and the like on the surface of a target matrix during pattern transfer. The method comprises the steps of firstly, combining modeling simulation and experiments in simulation software by using a conformal algorithm to obtain a position mapping relation between a plane and a curved surface under deformation of a rubber head, calculating to obtain a required pattern, then preparing the pattern on a engraving plate, carrying out high-precision alignment by using an alignment rod and an alignment plate, picking up the pattern on the engraving plate by using a flexible rubber head, and releasing the pattern on the curved surface, so that high-precision and high-efficiency transfer of the curved surface pattern is realized. The technical scheme of the invention is as follows: the high-precision curved surface transfer printing device comprises a mechanical part and an upper computer part, wherein the mechanical part comprises a bearing frame module 1, a motion control module 2, an electric cylinder motion module 3, a module motion module 4, a scraping module 5, a rubber head centering module 6 and an alignment module 7; The bearing frame