User's Manual ISO TNC 360 (260020xx, 280490xx) - heidenhain

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8 Cycles 8.2 Simple Fixed Cycles POCKET MILLING G75/G76 TNC 360 Process The rectangular pocket milling cycle is a roughing cycle, in which • the tool penetrates the workpiece at the starting position (pocket center) • the tool subsequently follows the programmed path at the specified feed rate (see Fig. 8.9). The cutter begins milling in the positive axis direction of the longer side. With square pockets, the cutter begins in the positive Y direction. At the end of the cycle, the tool returns to the starting position. Requirements / Limitations This cycle requires a center-cut end mill (ISO 1641) or a separate pilot drilling operation at the pocket center. The pocket sides are parallel to the axes of the coordinate system. Direction of rotation for roughing out Clockwise direction of rotation: G75 Counterclockwise direction of rotation: G76 Input data • Setup clearance A • Milling depth B • Pecking depth C • FEED RATE FOR PECKING: Traversing speed of the tool during penetration. • FIRST SIDE LENGTH D : Length of the pocket, parallel to the first main axis of the working plane. • SECOND SIDE LENGTH E : Width of the pocket The signs of the side lengths are always positive. • FEED RATE: Traversing speed of the tool in the working plane. Calculations Stepover factor k: k = K x R K: Overlap factor (preset by the machine tool builder) R: Cutter radius Rounding radius The pocket corners are rounded with the cutter radius. C Fig. 8.7: Infeeds and distances for the POCKET MILLING cycle Fig. 8.8: Side lengths of the pocket Fig. 8.9: Tool path for roughing out F D A B G76 G75 E k 8-11
8 Cycles 8.2 Simple Fixed Cycles 8-12 Example: Rectangular pocket milling Pocket center coordinates: X = 60 mm Y = 35 mm Setup clearance: 2 mm Milling depth: 10 mm Pecking depth: 4 mm Feed rate for pecking: 80 mm/min First side length: 80 mm Second side length: 40 mm Milling feed rate: 100 mm/min Direction of the cutter path: + POCKET MILLING cycle in a part program 55 15 40 Y 80 R5 20 100 %S812I G71 * ............................................................ Begin program N10 G30 G17 X+0 Y+0 Z–20 * ................................... Define workpiece blank N20 G31 G90 X+110 Y+100 Z+0 * N30 G99 T1 L+0 R+5 * .............................................. Tool definition N40 T1 G17 S2000 * .................................................. Tool call N50 G76 P01 –2 P02 –10 P03 –4 P04 80 P05 X+80 P06 Y+40 P07 100 *................................................... Cycle definition POCKET MILLING N60 G00 G40 G90 Z+100 M06 * ............................... Retract the spindle, insert the tool N70 X+60 Y+35 M03 * .............................................. Move to starting position (pocket center), spindle ON N80 Z+2 M99 * .......................................................... Pre-positioning in Z to setup clearance, cycle call N90 Z+100 M02 * ...................................................... Retract tool and end program N9999 %S812I G71 * X TNC 360
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February 1994 HEIDENHAIN User's Man
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TNC Guideline: From workpiece drawi
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How to use this manual TNC 360 This
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Contents User's Manual TNC 360 ISO
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2 Manual Operation and Setup TNC 36
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4 Programming TNC 360 4.1 Editing P
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6 Subprograms and Program Section R
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8 Cycles TNC 360 8.1 General Overvi
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10 MOD Functions TNC 360 10.1 Selec
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1 Introduction 1.1 The TNC 360 1-2
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1 Introduction 1.1 The TNC 360 1-4
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1 Introduction 1.2 Fundamentals of
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1 Introduction 1.3 Switch-On 1-14 S
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1 Introduction 1.4 Graphics and Sta
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1 Introduction 1.4 Graphics and Sta
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1 Introduction 1.5 Programs Selecti
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2 Manual Operation and Setup 2.1 Mo
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2 Manual Operation and Setup 2.4 3D
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2 Manual Operation and Setup 2.6 Me
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3 Test Run and Program Run 3.2 Prog
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3 Test Run and Program Run 3.2 Prog
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3 Test Run and Program Run 3.3 Bloc
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4 Programming 4.1 Editing Part Prog
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4 Programming 4.2 Tools TNC 360 Eac
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4 Programming 4.2 Tools Entering to
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4 Programming 4.2 Tools Calling too
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4 Programming 4.3 Tool Compensation
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4 Programming 4.3 Tool Compensation
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4 Programming 4.4 Program Creation
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4 Programming 4.5 Entering Tool-Rel
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4 Programming 4.6 Entering Miscella
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5 Programming Tool Movements 5.1 Ge
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5 Programming Tool Movements 5.2 Co
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Page 169 and 170: 8 Cycles 8.3 SL Cycles CONTOUR GEOM
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Page 179 and 180: 8 Cycles 8.3 SL Cycles CONTOUR MILL
Page 183 and 184: 8 Cycles 8.4 Cycles for Coordinate
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11 Tables, Overviews, Diagrams 11-2
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