Tính toán và mô phỏng hiện tượng ma sát trượt đối với vật lăn ứng dụng trong thiết kế hệ thống cấp -thoát phôi của máy in lụa bán tự động kiểu mới

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Tác giả: Thành Kiệt Võ

Ngôn ngữ: vie

Ký hiệu phân loại: 531.44 Classical mechanics Solid mechanics

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ (ĐH Công nghiệp TP. Hồ Chí Minh), 2021

Mô tả vật lý: 85-96

Bộ sưu tập: Metadata

ID: 498532

Thêm vào giỏ

Bài báo trình bày việc tính toán góc nghiêng cần thiết của một mặt phẳng nghiêng để đáp ứng yêu cầu về thời gian lăn (có trượt và không trượt) của vậthình trụ và ứng dụng trong việc thiết kế bộ phận cấp -thoát phôi của máy in lụa bán tự động kiểu mới. Những công thức tìm được chỉ đúng với giả thiết các vật lăn là đồng chất và hình dạng trụ. Còn với các vậtlăn có hình dạng phức tạp với nhiều thành phần vật liệu khác nhau (nắp chai, thân chai), tác giả đã sử dụng phần mềm Recurdyn để mô phỏng và tìm ra góc nghiêng cần thiết. Kết quả mô phỏng đã cho thấy, sai số giữa công thức ở trường hợp lý tưởng và phần mềm mô phỏng ở khoảng trên -dưới 10%, từ đó có thể thiết kế được các bộ phận cấp -thoát phôi của máy in lụa trong điều kiện thực tế. Cụ thể là máng cấp phôi có góc nghiêng là khoảng từ 0.14÷2.3°, máng thoát phôi cần có góc nghiêng từ 7÷10° để đảm bảo yêu cầu về năng suất in.Bài báo là một ví dụ điển hình trong việc ứng dụng mô phỏng vào việc thiết kế các hệ thống cơ khí và máy móc ở Việt NamThe paper presents the calculation of the required inclination angle of an inclined plane to meet the rolling time requirements (with slip and no-slip) of a cylindrical object and its application in the design of the workpiece feed-escape parts ofnew semi-automatic silk screen printing machine. The formulas found are only true assuming the rolling bodies are homogeneous and cylindrical. As for the roller with complex shapes with many different material components (bottle cap, bottle body), Recurdyn software was used to numerically investigatethe necessary angle of inclination. The simulation results show that the error between the formula in the ideal case and the simulation software isaround 10%, thus it ispossible to design the feed -escape moduleof the screen printing machine in the actual event. Specifically, the inclined chute for the workpiece feeding has an angle about0.14 ÷ 2.3°of inclination, and the workpiece drainingneeds to have an angle of 7 ÷ 10°to ensure printing productivity requirements. The paper is a typical example of the application of simulation to thedesign of mechanical systems and machines in Vietnam.

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