RU94020443A - Process of laser engraving and device for its realization - Google Patents

Abstract

FIELD: electronics. SUBSTANCE: invention refers to processes of formation of convex element and holes on surface of various materials with the use of laser radiation and may find use in manufacture of printed forms. According to process of laser engraving space between elements of pattern is schematically divided into two zones: surface one and depth one. Flux of laser radiation is modulated in time. Focused laser beam is directed on to machined surface of workstock and its scanning over machined surface is carried out to obtain specified contour. Rate of movement of laser beam is selected such that layer of metal which depth corresponds to required precision of formation of contour and profile of element of pattern is removed in the course of single run. Required profile of pattern is formed by repetition of scanning procedure. When depth zone is machined power of laser radiation is increased as well as diameter of bracing and rate of movement of laser beam. Computer controls output power of laser, modulation of radiation flux in time and rate and parameters of scanning. EFFECT: expanded application field, increased operational reliability. 1 cl, 2 dwg

Claims (1)

Изобретение относится к методам формирования на поверхности материалов выпуклых элементов, отверстий с помощью лазерного излучения и может найти применение при изготовлении печатных форм. Способ лазерного гравирования, при котором пространство между элементами рисунка условно разделяют на две зоны - поверхностную и глубинную. Поток лазерного излучения модулируют по времени. Сфокусированный лазерный пучок направляют на обрабатываемую поверхность заготовки, осуществляют его сканирование по обрабатываемой поверхности для получения заданного контура, причем выбирают скорость перемещения лазерного пучка такой, чтобы за один проход удалялся слой материала, глубина которого соответствует требуемой точности формирования контура и профиля элемента рисунка. Формируют требуемый профиль элемента рисунка путем повторения процедуры сканирования. При обработке глубинной зоны увеличивают мощность лазерного излучения, а также диаметр перетяжки и скорость перемещения лазерного пучка. Управление выходной мощностью лазера, модуляцией потока излучения по времени и скоростью и параметрами сканирования осуществляют с помощью ЭВМ.The invention relates to methods for forming convex elements on the surface of materials, holes using laser radiation and can find application in the manufacture of printing plates. A laser engraving method, in which the space between the elements of the picture is conventionally divided into two zones - surface and deep. The laser flux is modulated over time. The focused laser beam is directed to the workpiece surface to be processed, it is scanned along the processed surface to obtain a predetermined contour, and the speed of the laser beam is chosen so that a layer of material is removed in one pass, the depth of which corresponds to the required accuracy of the contour formation and profile of the pattern element. The required profile of the picture element is formed by repeating the scanning procedure. When processing the deep zone, the laser radiation power is increased, as well as the waist diameter and the speed of the laser beam. The output laser power, the modulation of the radiation flux in time and speed and scanning parameters are controlled by a computer.