One minute understanding of performance characteristics of precision gantry milling machine

Performance characteristics of precision gantry milling machine. The gantry milling machine is characterized by sufficient rigidity, high efficiency, convenient operation, simple structure, comprehensive performance, etc. The specific performance characteristics vary according to the type, model and manufacturer, which is closely related to the technology used. Take the SK series three-axis CNC gantry milling machine mentioned above as an example, its performance characteristics are as follows:;

The vertical milling head is equipped with TX400 heavy-duty gantry milling head with double rectangular guide rails, which has strong rigidity. Equipped with ball screw, pneumatic broach device, driven by servo motor. The side milling head is equipped with V5 gantry milling head, and an independent lubricating device is installed. The lifting is driven by an ordinary reducer with variable frequency speed regulation. The universal milling CNC milling three-axis CNC system with one key conversion can be programmed and manually operated through the expansion panel, which is highly realizable in the actual processing process. The precision gantry milling machine bed, the upper and lower beams, and the upper and lower end milling heads are equipped with ball screws, which are driven by servo motors. Equipped with timing belt and timing wheel. The hand-held electronic handwheel unit is convenient for three-axis tool setting. The unique cross beam lifting safety interlock device ensures the repeated positioning accuracy of the machine tool. The standard cycloidal pump unit is continuously lubricated with low failure rate.

In order to reduce thermal deformation, the following measures are usually adopted in the structure of precision gantry milling machine.

Control of temperature rise After taking a series of measures to reduce heat sources, the thermal deformation will be improved. However, it is usually very difficult, or even impossible, to completely eliminate the internal and external heat sources of the gantry milling machine. Therefore, it is necessary to control temperature rise through good heat dissipation and cooling to reduce the influence of heat source. One of the more effective methods is to forcibly cool the hot part of the gantry milling machine, or heat the low temperature part of the gantry milling machine to make the temperature of each point of the gantry milling machine consistent, which can reduce the warpage deformation caused by temperature difference. Reduce heat The main heat source that produces thermal deformation when the temperature inside the gantry milling machine rises should be separated from the host machine as far as possible. Improvement of headstock For headstock of gantry milling machine, thermal deformation should occur in the vertical direction of tool cutting. In this way, the influence of thermal deformation of the spindle on the machining diameter can be reduced to a lower level. In structure, the distance between the center and the main shaft and the ground shall be minimized to reduce the total amount of thermal deformation. At the same time, the temperature rise in front of and behind the axle box should be consistent to avoid the tilt of the main shaft after deformation.

Improve the mechanism of precision gantry milling machine. Under the same heating conditions, the gantry milling machine mechanism has a great influence on the thermal deformation. For example, the single column mechanism used by the gantry milling machine may be replaced by the double column mechanism. Due to the symmetry between left and right, the main shaft of the heated double column mechanism has little deformation in other directions except for vertical translation, and the movement of the vertical axis can be easily compensated by coordinate correction.