1、 Overview of the Plan

The casting of the machine tool bed is the core structural component of the machine tool, which directly determines the rigidity, accuracy, and stability of the machine tool. This solution provides full process technical support from material selection, casting process to maintenance, helping to improve the overall performance of the machine tool.

2、 Core advantages

1. Material performance optimization

Grey cast iron (HT250/HT300): good shock absorption, low cost, suitable for ordinary machine tools;

Ductile iron (QT450/QT600): high strength, good wear resistance, used for heavy-duty machine tools;

Alloy cast iron (such as high phosphorus cast iron): corrosion-resistant, high temperature resistant, suitable for special working conditions.

2. Manufacturing process assurance

Resin sand casting: high dimensional accuracy (CT7-CT9), surface smoothness Ra ≤ 25 μ m;

◦ Lost foam casting: Strong ability to form complex structures, reducing machining workload;

Time treatment: Natural aging (6-12 months) or vibration aging to eliminate internal stress.

3. Structural design innovation

Box shaped section+reinforced rib layout: improves bending stiffness by more than 30%;

2. Key factors for selection

• Machine tool type:

Choose gray cast iron for lathes/milling machines and ductile iron for boring/grinding machines;

High rigidity alloy cast iron is required for high-speed machining centers.

Load capacity: The recommended load-bearing capacity per unit area of the bed is ≤ 500kg/m ² (dynamic load).

Accuracy requirement: Precision machine tools require a guide rail straightness of ≤ 0.02mm/m.

3、 Typical application scenarios

1. Ordinary mechanical processing: economical lathes, drilling machine bed bodies;

2. Precision manufacturing: CNC grinding machines, gear machining machine bed bodies;

3. Heavy equipment: gantry milling machine, floor boring machine bed;

4. Special environment: corrosion-resistant chemical specialized machine tools, high-temperature environment specialized bed bodies.

1. Core Process Flow Chart

Material melting → Mold design → Casting → Rough machining → Aging treatment → Semi precision machining → Precision machining → Testing

4、 Installation and maintenance plan

1. Installation points

1. Basic processing:

Concrete foundation thickness ≥ 300mm, with reserved anchor bolt holes;

Adjust the water level to ≤ 0.05mm/m (using a high-precision level).

2. Fixed bed:

Four point support (uniform force) or multi-point support;

Pre tightening force control is required for anchor bolts (according to the manufacturer's torque requirements).

2. Maintenance points

• Daily maintenance: Clean iron filings daily and apply rust proof oil to the guide rail surface;

Regular testing: Use a laser calibrator to measure the deformation of the bed every year (if it exceeds the tolerance, it needs to be adjusted or repaired);

Long term storage: rust proof packaging+moisture-proof measures, avoid direct sunlight.

5、 Customized services