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CN-121988891-A - Multi-angle automatic marking system and method for ceramic disc

CN121988891ACN 121988891 ACN121988891 ACN 121988891ACN-121988891-A

Abstract

The invention discloses a ceramic disc multi-angle automatic marking system and a method thereof, belonging to the technical field of laser precision machining and automation equipment. The system comprises a cabinet, a safety protection unit, an upper marking unit, a lower marking unit, a side marking unit, a transferring and positioning unit and a main control unit. The method comprises the steps of selecting a template through an industrial personal computer after feeding, completing front and back marking through an upper marking unit and a lower marking unit, transferring a ceramic disc to a side marking unit through a transfer positioning unit, carrying out precise angle adjustment through a central control rotating platform according to a pre-stored angle mapping relation and combining visual alignment feedback, and completing side marking through a side marking assembly. The invention realizes one-time feeding and multi-surface automatic marking of the ceramic disc, effectively overcomes the accumulated errors of transfer and positioning through a visual compensation mechanism, ensures the high-precision spatial angle relation among the marking contents of the front, back and side surfaces, and remarkably improves the production efficiency and consistency.

Inventors

  • RONG MIN
  • MIAO ZEMIN
  • WANG YANG
  • ZHANG KUI
  • DENG XIAOXING
  • Xie Xingzhe

Assignees

  • 中科特瓷半导体材料(苏州)有限公司

Dates

Publication Date
20260508
Application Date
20260226

Claims (9)

  1. 1. A multi-angle automatic marking system for ceramic discs, comprising: the equipment comprises a cabinet (1) and a safety protection unit, wherein the cabinet is provided with an openable protective cover (2) to form a closed marking working area; the upper and lower marking unit is fixedly arranged at a first station in the marking working area and comprises an upper marking assembly for marking the front surface of the ceramic disc (9) and a lower marking assembly for marking the back surface of the ceramic disc (9); The side marking unit is arranged at a second station in the marking working area and comprises a central control rotating platform (6) and a side marking assembly (43), wherein the central control rotating platform (6) is used for bearing and driving the ceramic disc (9) to rotate around a vertical axis, and the side marking assembly (43) is used for marking the side surface of the ceramic disc (9) rotating to a specific angle; The transfer positioning unit comprises a positioning clamp (5) and a transfer mechanism for driving the positioning clamp (5) to move between a first station and a second station, wherein the positioning clamp (5) is used for receiving and initially positioning the ceramic disc (9) at the first station and keeping the ceramic disc (9) fixed in the transfer process; The main control unit comprises an industrial personal computer (3), marking templates and angle mapping relation data corresponding to different product categories are pre-stored in the industrial personal computer (3), and the main control unit is in signal connection with the upper and lower marking units, the side marking units and the transfer positioning unit and is configured to execute the following cooperative control: a. The transfer positioning unit is controlled to position a positioning fixture (5) loaded with the ceramic disc (9) at a first station, and the upper and lower marking units are controlled to finish marking of the front surface and the back surface of the ceramic disc (9); b. the transfer positioning unit is controlled to transfer the ceramic disc (9) with the double-sided marking to a second station and positioned right above the central control rotating platform (6); c. According to the angle mapping relation data corresponding to the selected marking template, controlling the central control rotary platform (6) to conduct angle adjustment on the ceramic disc (9); d. and controlling the side marking assembly (43) to mark the side surface of the ceramic disc (9) at the adjusted angle, so that the side marking content and the front and back marking content meet the preset spatial angle relation.
  2. 2. The multi-angle automatic marking system of the ceramic disc according to claim 1, wherein the angle mapping relation data is calculated and converted into a rotation angle instruction required for driving the central control rotary platform (6) according to the relative space angle between the design position of the side marked content and the marked content on the front and the back of the ceramic disc (9).
  3. 3. The multi-angle automatic marking system for ceramic discs according to claim 1 or 2, wherein in the transfer positioning unit, the transfer mechanism is a multi-axis mechanical arm, a linear module or a rotary swing arm, and the positioning clamp (5) is mounted at the execution end of the transfer mechanism and is provided with a pneumatic or electric clamping jaw for clamping the ceramic discs (9) in the transfer process.
  4. 4. The multi-angle automatic marking system for ceramic discs according to claim 1, further comprising a visual alignment unit, wherein the visual alignment unit comprises a camera arranged at a second station and is used for identifying the front and back marking characteristics existing on the ceramic disc (9) before the ceramic disc (9) is subjected to angle adjustment by the central control rotary platform (6), and feeding back characteristic angle information to the main control unit and correcting a rotation angle instruction.
  5. 5. The multi-angle automatic marking system for ceramic discs according to claim 1, wherein the upper marking assembly and the lower marking assembly of the upper marking unit and the lower marking unit are integrated with independent Z-axis lifting driving modules so as to adapt to ceramic discs (9) with different thicknesses and adjust focal lengths.
  6. 6. The system according to claim 1, characterized in that the central control rotary platform (6) is a DD motor or a hollow rotary platform with high angular indexing accuracy, and the rotation axis is hollow, so as to allow the laser beam or the marking head of the side marking assembly (43) to mark the side of the ceramic disc (9) from the axial direction.
  7. 7. A method of multi-angle automatic marking of ceramic discs using the system of any one of claims 1 to 6, comprising the steps of: S1, feeding a ceramic disc (9) to a positioning clamp (5) manually or by a manipulator at an upper and lower feeding station for initial positioning; s2, selecting a marking template corresponding to the product category of the current ceramic disc (9) through the industrial personal computer (3); s3, controlling the transfer positioning unit to transfer the positioning clamp (5) and the ceramic disc (9) to a first station accurately; s4, controlling an upper marking assembly and a lower marking assembly of the upper marking unit and the lower marking unit to mark the upper surface and the lower surface of the ceramic disc (9) sequentially or simultaneously; s5, controlling the transfer positioning unit to transfer the ceramic disc (9) with the double-sided marking to a second station, and placing the ceramic disc directly above the central control rotary platform (6) or being received by the central control rotary platform; S6, controlling the central control rotating platform (6) to accurately adjust the angle of the ceramic disc (9) according to the angle mapping relation of the selected template; S7, controlling the side marking assembly (43) to mark the side surface of the ceramic disc (9) with the angle adjusted; and S8, after marking, transferring the ceramic disc (9) to a blanking station.
  8. 8. The method according to claim 7, wherein in step S6, the process of angle adjustment includes first obtaining an actual angle of the marked reference feature on the ceramic disc (9) by a visual alignment unit, then comparing the actual angle with a theoretical design angle to calculate a compensation rotation amount, and finally controlling the central control rotation platform (6) to execute the compensation rotation amount to realize accurate positioning.
  9. 9. The method according to claim 7, wherein the accurate positioning at the first station in step S3 and the receiving by the central control rotary platform (6) at the second station in step S5 are achieved by positioning pins, conical surface matching or high-precision positioners, so as to ensure that the repeated positioning precision between the two positionings meets the angular tolerance requirement of the side and front and back marking contents.

Description

Multi-angle automatic marking system and method for ceramic disc Technical Field The invention relates to the technical field of laser precision machining, in particular to a system and a method for performing multi-angle and multi-surface automatic laser marking on the surface of a cylindrical ceramic workpiece. Background Ceramic disc type workpieces (ceramic polishing discs, etched cavity domes, etc.) often require permanent identification on their cylindrical surfaces, including upper, lower, and circumferential sides. In many application scenarios, a strict spatial angular relationship between the side mark and the front and back mark needs to be maintained, so as to meet the requirements of assembly alignment, function indication or appearance design. In the prior art, the method for realizing the multi-face marking mainly comprises the following steps: 1. the manual multiple clamping marking method comprises the steps that an operator uses a universal laser marking machine to mark one surface of a workpiece, then manually turns over, adjusts the angle according to experience, and marks other surfaces. The method has low efficiency, poor consistency, dependence on personnel skills and difficulty in being suitable for batch production. 2. The simple multi-shaft marking machine method adopts a workbench with a rotating shaft and is matched with a fixed laser head to mark different surfaces. However, such devices generally lack multi-station cooperation and transfer positioning design, and after the front and back surfaces are printed, the workpiece needs to be moved to another position for side surface marking, so that transfer errors and secondary positioning errors in the process are easy to accumulate, and the angle precision between the side surfaces and the front and back surface marks is difficult to ensure. In addition, the conventional angle adjustment relies on encoder feedback, and cannot compensate for reference errors caused by initial placement deviation or thermal deformation of the workpiece. Therefore, a ceramic disc full-automatic marking system which can realize one-time feeding, automatic transfer, multi-station cooperation and high-precision angle automatic compensation through visual feedback is developed, and the ceramic disc full-automatic marking system has important industrial application value. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a multi-angle automatic marking system and a multi-angle automatic marking method for a ceramic disc, which can automatically finish high-precision marking of the front side, the back side and the side after one-time feeding of the ceramic disc, and ensure that the spatial angle relation among three-surface marks meets the technological requirements. In order to solve the technical problems, the invention adopts the following technical scheme: in a first aspect, the present invention provides a multi-angle automatic marking system for ceramic discs. The system comprises: The machine cabinet and the safety protection unit are provided with an openable protective cover, so that a closed marking working area is formed, and the operation safety is ensured. The upper and lower marking unit is fixedly arranged at a first station in the marking working area and comprises an upper marking assembly for marking the front surface of the ceramic disc and a lower marking assembly for marking the back surface of the ceramic disc. And the side marking unit is arranged at a second station in the marking working area and comprises a central control rotary platform and a side marking assembly. The side marking assembly is used for marking the side surface of the ceramic disc rotating to a specific angle. The transfer positioning unit comprises a positioning fixture and a transfer mechanism for driving the positioning fixture to move between a first station and a second station. The positioning fixture is used for receiving and initially positioning the ceramic disc at the first station and keeping the ceramic disc fixed in the transferring process. The main control unit comprises an industrial personal computer, and marking templates and angle mapping relation data corresponding to different product types are pre-stored in the industrial personal computer. The main control unit is in signal connection with the upper and lower marking units, the side marking units and the transfer positioning unit, and executes a cooperative control flow. The visual alignment unit comprises a camera arranged at the second station and is used for identifying the front and back marking characteristics existing on the ceramic disc before the angle of the ceramic disc is adjusted by the central control rotating platform, feeding back characteristic angle information to the main control unit and carrying out on-line correction on the theoretical rotating angle instruction. The angle mapping relation data is calculated and converted