The savvy processor will definitely spend a lot of time considering the loss caused by the preparation time of the machine tool and the human factors of the personnel. We always remember not to remind them in this regard. And what we should do is how to give them higher processing efficiency from the processing time of the machine tools, and possibly reduce their grinding time. Even zero polishing. The shining appearance of high-speed cutting equipment is an event that makes the processor slammed. Not to mention its expensive cost (about 1.5 million), Japanese and Europeans spare no effort to promote the benefits of high-speed cutting and let people adopt their equipment. Of course, it is not practical. Eight years of actual combat experience in the CNC machine tool industry tells me that their cost should be about 600,000 to 700,000. Such a high profit margin allows me to see their essence. The gross profit of domestic CNC machine tools should be between (30 ~ 40%). This is a reasonable and honest profit. If you are willing to maintain their high profits, I think it is impossible to make more money at the same time. We must also consider after-sales service and so on. I can't believe that their service can solve all problems within 1-2 days. Because our existing technology can not realize "solid fax".
From the perspective of revitalizing national industry, it should support the development of domestic machine tool factories. The essence of high-speed cutting is to complete the walking length of the tool in a short time. Everybody knows
Distance = speed × time
The description of the tool has been determined by the way of cutting in the fixed country. It means that unprofitable increase in speed is equivalent to shortening the time.
High-speed cutting due to the limitations of the current machine tool's main spindle and the tool used determines that it cannot be necessarily good. At present, the common practice abroad is that the first equipment does not use high-speed cutting, and the second or third can be considered. This equipment.
Examples of successful practices:
A copy milling machine completes most of the cutting amount (heavy cutting) and the remaining machining allowance of 2 ~ 3mm. The remaining cutting amount is quickly completed on high-speed machine tools.
1)-There are many heavy cutting machine tools, and the processing cost is very low
2)-Large processing volume, low accuracy requirements are easy to achieve
3)-cheap tools
4)-After turning to high-speed cutting, because the processing object is close to forming, the cutting amount of the first knife is very uniform
5)-Forming quickly and accurately
6)-Too much sanding is required, with precise dimensions
7)-Although the tool is expensive, but the time is short, the cutting amount is not large, and the performance-price ratio is very good
8)-A lot of subtleties, such as small angle conductance, etc., can be completed at one time without electric sparks,
9)-Excellent surface finish (mirror effect)
In this way, the coordination of the equipment is the way to win, because its remaining amount is 2 ~ 3 mm, so two calibrated G54 baffles on the work table XY complete the problem of workpiece clamping, and for cutting The small amount of the workpiece is directly completed on the high-speed machine tool.
There is another problem to discuss is the problem of the main shaft
For CNC milling and machining centers, low speed and large torque are required, so the reduction ratio from the main shaft gearbox must be used to improve the torque. The low speed and poor accuracy are inevitable, so it is unlikely to use small radius tools. For the engraving and milling machine, the spindle must work at 20,000 to 30,000 RPM. The rotation accuracy is generally about 2 μ, otherwise the knife breakage is very serious, so you must use an electric spindle, that is, the motor and the spindle are integrated. For high-speed cutting equipment, the built-in electric spindle is required, and at low speeds, a certain torque is required to have an oil-water cooler to keep the spindle operating temperature constant. The spindle power should be above 7.5 ~ 8KW, and the rotation speed should exceed 25000RPM.
