Каталог Iscar дисковые фрезы и фрезерные пластины 2022 - страница 121
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Thread Milling CNC Program for Internal Thread Internal Thread
| Right-hand thread (climb milling) from bottom up. | Example: | M 48x2.0 IN-RH |
| Program is based on tool center. | (Thread depth 25 mm) | |
| This method of programming needs no tool radius | Toolholder: MTSR0029 J30 | |
| compensation value other than an offset for wear. | (Cutting dia. 29 mm) | |
| Insert: | MT30 I2.0ISO |
| A | = Radius of tool path A | =(Do-D)/2=(48-29)/2=9.5 | ||
| A = Do – D | ||||
| 2 Do = Major thread diameter | A/2 | =4.75 | ||
| D | = Cutting diameter (Tool compensation of radius=0) | |||
| G90 | G0 G54 G43 G17 H1X0 Y0 Z10 S1320 | |||
| G0 | Z-25 | |||
| General Program | G01 | G91 G41 D1X 4.75 Y-4.75 Z0 F41 | ||
| G90 | G00 G54 G43 H1X0 Y0 Z10 S... | G03 X4.75 Y4.75 R4.75 Z0.25 | ||
| G00 | Z-(to thread depth) | G03 | X0 Y0 I-9.5 J0 Z2.0 | |
| G01 | G91 G41 D1 X(A/2) Y-(A/2) Z0 F... | G03 | X-4.75 Y4.75 R4.75 Z0.25 | |
| G03 | X(A/2) Y(A/2) R(A/2) Z(1/8 pitch) | G01 | G40 X-4.75 Y-4.75 Z0 | |
| G03 | X0 Y0 I-(A) J0 Z(pitch) | G90 | G0 X0 Y0 Z0 | |
| G03 | X-(A/2) Y(A/2) R(A/2) Z(1/8 pitch) | M30 | ||
| G01 | G40 X-(A/2) Y-(A/2) Z0 | % |
G90 X0 Y0 Z0 Number of Radial Passes In order to produce a thread, in some cases Y+ one radial pass is sufficient but other times a
number of radial passes are required. Major thread Dia. The table below presents ISCAR's recommendations for the number of radial passes depending on the material and lead. DO X- X+ D A A/2 A/2
Tool Path
Y-