| 摘要 |
PURPOSE:To reduce an entire working time in the stage of working points at plural places by moving materials to be worked sequentially with a laser at the lowred speed to the extent of obviating deterioration in working characteristics without stopping the materials to be worked during working. CONSTITUTION:When plural working points are going to pass through a laser condensing spot. a locus 3 wherein the moving time including acceleration control is shortest is beforehand determined. The working points thereon are defined sequentially as 1, 2... and the points just before the respective working points where a moving table is decelerated are defined as 1l, 2l.... The respective coordinates are determined as shown in the figure. The moving speed of the materials to be worked on the working table is made a function of positions. In the position (il), said speed is decelerated, and in the position (i), the speed is lowest, and at this point, the laser is irradiated. This min speed (v) can be set by the equation I if the irradiation time is defined as (t), the diameter of punching with a laser or the diameter of weld nugget as (d), and the permissible deformation of the working diameter is <=10%. The distance Li between the points (il) and (i) follows approximately the equation II, but it is justified if it is the distance required for deceleration to the (v) from the moving speed. |
