1. The mechanism design is suitable for high-speed operation
The high-speed machine tool first requires its mechanism to have high rigidity, to be able to absorb high-frequency vibration and high inertia G value to ensure high-speed cutting precision and stability.
The spindle speed can now reach a very high level, which requires a high-speed spindle to have a good lubrication and cooling system and to comply with the principle of short, small, light and thin.
As one of the actuators for high-speed machining, the high-speed feed mechanism is required to meet high-feed acceleration and deceleration, and at the same time must achieve high precision.
Therefore, the servo motor and the ball screw need actual transmission without backlash and LOSSMOTION phenomenon in order to show the effect in high-feed cutting; the design of the ball screw mechanism must also ensure the positioning accuracy and prevent thermal displacement errors; The Z-axis requires light weight, because the Z-axis must be sensitive up and down without interference and jitter. At the same time, a special electronic control circuit design is required so that the Z-axis will not fall even if the power is turned off instantly, causing the tool The insert knife is damaged. Mold processing is generally long-term processing.
Therefore, the heat rises in the long-term high-speed operation of the spindle inverter, which can easily cause the aging of electronic parts. Therefore, the electric control box needs to adopt a closed air-conditioning system to ensure the life and stability of the parts in the box. , And prevent oil from entering.
2. Excellent CNC control system
The CNC numerical control system is the unit that issues position instructions, which requires that the instructions can be transmitted accurately and quickly. After processing, the position instruction is issued to each coordinate axis. The servo system must quickly drive the tool or the table to move accurately according to the instruction. It requires the ability to quickly process the program segments, to be able to control the machining error to a minimum, and so on. In the field of high-speed machining applications, Siemens 840D and Fanuc18iMB are the most representative.
3. Tool holders and tools suitable for high-speed operation
High-speed cutting tools, especially high-speed rotating tools, are required to have better quality and performance in terms of ensuring machining accuracy and operating safety. For tools, the slenderness ratio is preferably less than 10 times. There are tungsten carbide knives, CBN knives and titanium-coated tungsten carbide knives. For tool holders, the dynamic balance is required to be less than 2.5G. HSK, BBT (BTF-B) and some special tool holders can well meet the above requirements.
4. Professional CAD/CAM software
Professional CAD/CAM software requires a precise path calculation method, which can not only accurately meet the accuracy requirements of 3DProfile, but also reduce the discharge process, and even achieve the surface quality requirements without polishing. It must be able to generate a good cutting path and stabilize the cutting volume, which not only improves machining efficiency, but also prolongs tool life and saves tool costs. Due to the diversification of the design software, it needs to have good conversion compatibility with other software, and can easily accept the graphics files converted by other software without distortion, even if there are small holes or gaps, it can be built-in Quick fixes in 2D and 3DCAD to keep users from loopholes and grasp the timeliness.