| h speed machining is a proven stipulation | | | | acceleration |
| characterized by low cutting forces and high metal | | | | 4. What Can A High Speed Control Possibly Do? |
| removal. High Speed Milling is a technique used in | | | | A CNC milling machine which possesses a higher |
| the CNC Milling Industry that combines high spindle | | | | structural stiffness has a greater potential |
| speeds with increased feed rates. This results in a | | | | acceleration rate. Box shaped high speed CNC |
| high chip-forming rate and lower milling forces, | | | | milling machine, like Bridge and Gantry is the |
| producing an improved surface quality and closer | | | | mostly widely used types of High speed CNC |
| tolerances. In high speed milling, the electronics can | | | | milling tools. The overhead type Gantry exudes |
| make all the difference. The right CNC coupled | | | | the highest stiffness, acceleration and accuracy |
| with other elements of the control system can let | | | | among other high speed CNC milling tools. Due to |
| a slower machine mill a given form faster than a | | | | its scalability, this machine type is available in sizes |
| machine with a higher top feed rate. | | | | to match the work piece, from small to large. |
| 1. High Speed Uses | | | | In usual terms, it simply gives you the ability to |
| High-speed CNC milling is used, for example, to | | | | finish one task faster and move along to the next |
| machine the titanium rotors of the first | | | | sooner, making work output higher. In drilling and |
| high-pressure compressor stages of the EJ200 | | | | tapping, this can result in faster hole-to-hole times, |
| engine. High speed CNC milling allows | | | | quicker spindle reversals for tapping, and |
| cost-effective milling of the airfoil geometry from | | | | substantial cycle-time reductions. The most |
| the solid. By subsequent finishing operations the | | | | dramatic benefits, though, come in 3D designs |
| planned surface finish is achieved. The CNC milling | | | | machining. Few, drilling and tapping jobs require a |
| which caters to high speed must be structured | | | | million lines of machine codes. In molds, dies, |
| with an axis movement system that is suitable | | | | patterns, and prototypes, complex surfaces |
| for machining. | | | | comprising a million or more line segments are not |
| 2. Axis Movement | | | | at all uncommon. Saving just a fraction of a |
| The high-speed CNC milling machines required for | | | | second per move can result in substantial |
| the process must be fitted with an axis | | | | cycle-time improvements. |
| movement system suitable for machining blisks, | | | | 5. Downsides - When Is Fast Too Fast? |
| which should be at least 5 axes simultaneously, | | | | But despite all these benefits, in high milling, the |
| depending on the milling task involved and an | | | | tool path segments can be so short that a |
| efficiently high-speed control system. | | | | machining center moving at a high feed rate can't |
| 3. 3D Surfaces | | | | accelerate or decelerate fast enough to make |
| High Speed CNC milling machines working on 3D | | | | direction changes accurately. Corners may be |
| surfaces in any materials produce a finer surface | | | | rounded off and the work piece surface may be |
| finish and higher accuracy in less time that the | | | | gouged. Look-ahead is one answer. Look-ahead |
| traditional milling machine. Acceleration is the most | | | | capability can let the CNC read ahead a certain |
| critical factor that affects the high speed | | | | number of blocks in the program, to anticipate |
| machining. Since one or more axis are always | | | | sudden direction changes and slow the feed rate |
| increasing or decreasing velocity in a 3-D cut, | | | | accordingly. |
| ultimate feed rate is directly related to | | | | 6. |