| 摘要 |
1,200,119. Boring. KONGSBERG VAPENFABRIKKAS. 24 Nov., 1967 [29 Nov., 1966], No. 53483/67. Heading B3C. A bore having a contour P n-1 , P b , P n , P n+1 is produced in a workpiece, and if the tool breaks at point Pb for example, it is retracted along, or parallel to, the contour, to a point P n , and thence to a position P e , where the tool is changed. The tool movements are controlled by a punched tape which has a data set P n-1 - P n representing the curved contour element and auxiliary data sets P n-1 -P h , P h -P e , and P n -P n+1 may be provided, which are used only if the tool breaks during machining of the contour, for retracting the tool from point P n-1 to P e . After replacing the tool it is moved in the cutting direction, which movement is controlled by the data sets. The latter may be produced during normal machining but they are only read in if the operator switches over his control equipment to position " tool breakage." The contour sets and auxiliary sets may be provided on different carriers. |
