Causes and improvement measures of thermal deformation of gantry milling machine

Cause: under the influence of internal and external heat sources, the components of the gantry milling machine will have different degrees of thermal deformation, which will break the relative motion relationship between the workpiece and the cutter. For the gantry milling machine, because the whole processing process is controlled by the calculation command, the impact of thermal deformation is more serious.

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

1: After a series of measures to reduce the heat source are taken to control the temperature rise, the thermal deformation will be improved. But it is very difficult, even impossible, to completely eliminate the internal and external heat sources of the gantry milling machine. Therefore, it is necessary to control the temperature rise through good heat dissipation and cooling to reduce the influence of heat source. The most effective method is forced cooling in the heating part of the gantry milling machine, or heating in the low-temperature part of the gantry milling machine, so that the temperature of each point of the gantry milling machine tends to be the same, which can reduce the warpage caused by the temperature difference.

2: In order to reduce the main heat source of thermal deformation caused by the internal heating of the heating gantry milling machine, the heat source should be separated from the main machine as much as possible.

3: The improvement of spindle box for the spindle box of gantry milling machine, should try to make the thermal deformation of the spindle occur in the vertical direction of cutting tool. This can minimize the influence of spindle thermal deformation on machining diameter. In the structure, the distance between the spindle center and the spindle to the ground should also be reduced as far as possible to reduce the total amount of thermal deformation. At the same time, the front and rear temperature rise of the main axle box should be consistent to avoid the inclination of the spindle after deformation.

4: Under the same heating condition, improving the mechanism of the gantry milling machine has a great influence on the thermal deformation. For example, the single column mechanism used by the gantry milling machine in the past may be replaced by the double column mechanism. Due to the left and right symmetry, the main axis of the double column mechanism after heating has little deformation in other directions except for the translation in the vertical direction, and the axis movement in the vertical direction can be easily compensated by a coordinate correction.

Zaozhuang Make Machinery Co., Ltd.'s popular gantry milling machine models are X2014-20，X2014-40，X2016-30，X2020-30，X2025-40, etc. If you are interested in our products, welcome to consult us.