Requirements for the Foundation of Turning and Milling Machine Tools

In actual CNC equipment manufacturers, many equipment users ignore the requirements of the equipment installation environment. For heavy-duty CNC turning and milling machine tools and turning and milling machine tools, manufacturers generally provide users with the foundation drawings of the turning and milling machine tools. Users prepare the machine tool foundation in advance, maintain it for a period of time, and wait for the foundation to enter a stable stage before installing the machine tool. Heavy-duty turning and milling machine tools and turning and milling machine tools must have a stable machine tool foundation, otherwise, the turning and milling machine tool accuracy cannot be adjusted. Even after adjustment, it will change repeatedly. Some small and medium-sized CNC turning and milling machine tools do not have special requirements for the foundation.

(I) General requirements

1. When designing the foundation, the equipment manufacturer should provide the following information:

(1) Equipment model, speed, power, specifications, and outline dimensions, etc.

(2) The center of gravity and the location of the center of gravity of the equipment.

(3) The outer contour of the equipment base, auxiliary equipment, pipeline location, pit, ditch, hole size, grouting layer thickness, anchor bolts and embedded parts location, etc.

(4) Equipment disturbance force and disturbance torque and their direction.

(5) The location of the foundation and the foundation diagram of the adjacent buildings.

(6) Geological survey data of the construction site and foundation dynamic test data.

2. The foundation of the milling machine equipment is separated from the building foundation, superstructure and concrete floor.

3. When the pipeline is connected to the machine and generates large vibration, vibration isolation measures should be taken at the connection between the pipeline and the building.

4. When the vibration of the equipment foundation has a harmful effect on nearby personnel, instruments, factory production and buildings, isolation measures should be taken.

5. The equipment foundation design shall not produce harmful uneven settlement.

6. The setting of the equipment anchor bolts should meet the following requirements:

(1) The buried depth of the anchor bolt with a hook should not be less than 20 times the bolt diameter, and the buried depth of the anchor bolt with an anchor plate should not be less than 15 times the bolt diameter.

(2) The distance between the anchor bolt axis and the foundation edge should not be less than 4 times the bolt diameter, and the distance between the reserved hole edge and the foundation edge should not be less than 100mm. When it cannot meet the requirements of the milling machine, reinforcement measures should be taken.

(3) The concrete thickness under the bottom surface of the embedded anchor bolt should not be less than 50mm. When it is a reserved hole, the net concrete thickness under the bottom surface of the hole should not be less than 100mm.