After the CNC milling machine is placed on the foundation, first make a preliminary alignment, then pour the anchor screws with concrete. After solidification, tighten the anchor screws evenly. At the same time, check the level of the small CNC milling machine to ensure that it is level. The tolerance in the longitudinal and transverse directions of the workbench is 0.02/1000. After a period of maintenance, wait until the foundation enters a stable stage, and then install a small CNC milling machine. A precision small CNC milling machine must have a stable foundation, otherwise, the accuracy of the small CNC milling machine cannot be adjusted. Even if the accuracy is adjusted well, it will change repeatedly in the future. Some small and medium-sized CNC milling machines have no special requirements for the foundation. According to the provisions of my country's GB 50040-1996 "Power Machine Foundation Design Code", the following work should be done:
1. General requirements for the foundation of small CNC milling machines:
1. Foundation When designing, the equipment manufacturer should provide the following information:
2. Equipment model, speed, power, specifications, geometric outline and dimension drawings, etc.
3. The center of gravity and the location of the center of gravity of the equipment.
4. Outline diagram of the equipment base, auxiliary equipment, pipeline locations, pit, trench, hole dimensions, grouting layer thickness, location of anchor bolts and embedded parts, etc.
5. The disturbance force and disturbance moment of the equipment and their direction.
6. The location of the foundation and the foundation drawings of adjacent buildings.
7. Geological survey data and foundation dynamic test data of the construction site.
8. The equipment foundation is separated from the building foundation, superstructure and concrete floor.
9. When large vibrations occur due to the connection between pipelines and machines, vibration isolation measures should be taken at the connection between the pipeline and the building.
10. When the vibration of the equipment foundation has harmful effects on nearby personnel, precision equipment, instrumentation, factory production and construction, isolation measures should be taken.
11. The equipment foundation design must not produce harmful uneven settlement.
2. The setting of equipment anchor bolts should meet the following requirements:
1. The embedded depth of anchor bolts with hooks should not be less than 20 times the diameter of the bolt. The embedded depth of anchor and plate anchor bolts should not be less than 10 times the bolt diameter.
2. The distance between the axis of the anchor bolt and the edge of the foundation should not be less than 4 times the bolt diameter.
3. The distance between the edge of the reserved hole and the edge of the foundation should not be less than 120mm. When the requirements cannot be met, .Reinforcement measures should be taken.
4. The thickness of the concrete under the bottom of the embedded anchor bolts should not be less than 150mm.
5. When it is a reserved hole, the net thickness of the concrete under the bottom of the hole should not be Less than 120mm.
3. The following requirements should be followed for CNC equipment:
1. Small CNC milling machines can be classified according to the following principles:
2. Medium and small Small CNC milling machines refer to machines that weigh less than 100kN.
3. Large and small CNC milling machines are those that weigh between 100 and 300kN.
4. Heavy-duty small CNC milling machines refer to machines that weigh between 300 and 1000kN.
5. When carrying out basic design of CNC equipment, in addition to the above "general requirements"
IV., the equipment manufacturer should also provide the following information:
< p>1. The outline dimensions of a small CNC milling machine.2. When the inclination and deformation of the foundation have an impact on the machining accuracy of the small CNC milling machine or when calculating the foundation reinforcement, the distribution of the gravity of the small CNC milling machine and the processed workpiece, the movement of the small CNC milling machine or the mobile processing are still needed. The gravity of the workpiece and its range of movement.
3. Heavy-duty and precision small CNC milling machines should be installed on separate foundations.
5. When installing a separate foundation, the following specifications should be observed:
1. The plane size of the foundation should not be less than the outer dimension of the supporting area of ??the small CNC milling machine, and should meet the installation requirements. Dimensions required for adjustments and repairs.
2. The concrete thickness of the foundation should comply with the concrete thickness of the foundation of the metal cutting small CNC milling machine.