Machining Machine Casting Standard:GB9439—88。
The rigidity of machine tools is an important feature that directly affects productivity and processing accuracy. The chemical composition of the casting, design structure, casting process, and machining process of the machine tools are directly and closely related to the rigidity of the machine tools.
During the casting process of machine tools, alloy elements such as silicon, manganese, magnesium, aluminum, and copper are added to cast iron to enhance the strength of the machine tool castings. Our factory employs Casting technology, forming the components of machine tools, achieves high strength and rigidity, enhancing the vibration absorption capability of the machine tool castings, thereby improving the stability of the machine tool. The machine tool castings are designed with reinforcement ribs and dimensions for the bed, columns, and worktables within the machine tool, aiming to minimize weight while supporting very heavy loads. The machine tool castings are designed with a triangular stress structure, and the machine tool column castings are...AFormed structural design, eliminating the offset swing of the column during the machining process, thereby enhancing the load-bearing capacity of the machine table.
Castings offer excellent mechanical and physical properties, a comprehensive combination of strength, hardness, toughness, and properties such as low-temperature resistance and corrosion resistance.
The weight and size range of castings are quite broad, weights Only a few grams in weight. Up to heavy-duty400Tons, wall thickness - Thin only0.5Millimeters, thickness can exceed1Rice, available in lengths ranging from a few millimeters to over ten meters, catering to the diverse requirements of various industrial sectors.
Method for inspection of large machine tool castings
During the inspection of large machine tool castings, in addition to considering the stability of the inspection location, the observation results should be unified to the same reference plane, which enhances the accuracy and stability of the reference. When placed at different positions, the three support points of the marking flat and the marking platform undergo uneven load changes, causing contact deformation between the flat and the support. Common processing methods include scraping, where the working surface of the scraped flat can store lubricating oil and accommodate fine particles in the depressions. The tray for receiving the cuttings will also increase in size. Attention should also be given to the weight of the inspection tools, and auxiliary supports should be added to enhance the stability of the flat placement.
Large machine tool castings often require the addition of ribs and bulges for reinforcement, thereby enhancing the structure. Complexification. Additionally, without avoiding the repetition error caused by redundant observations, the retention of this contradictory calculation method is not reasonable, and thus it needs to be examined and controlled for the size of its repetition error. Cast iron materials include fine-grained gray cast iron or alloy cast iron. As these holes weaken the strength and rigidity of the box, cracks are prone to occur at the edges, causing the dimensional outline of the casting to increase.
Large machine tool castings are primarily used for the manufacturing of machine tool plates. Briefly introduce the casting characteristics. To fully utilize the feeding of liquid metal from bottom to top under pressure during low-pressure casting, it should be considered in the process design to utilize.
Basic characteristics of the casting process for large machine tool castings: filling speed and pressure can be appropriately adjusted. The casting molds used for large machine tool castings are divided into two types: metallic and non-metallic. Metallic molds are mostly used for large-scale production of non-ferrous metal castings, while non-metallic molds are commonly used for single-piece or small-batch production, such as sand molds, graphite molds, ceramic molds, and shell molds, all of which can be used for low-pressure casting. However, sand molds are still the most commonly used in production. But for the casting of large machine tool castings, the permeability and strength of the molding material for sand molds should be higher than during gravity casting, and the gases in the mold cavity are entirely discharged through exhaust channels and sand particle pores.
