Cycloid machining method for large-allowance casting blank

Abstract

The invention relates to the technical field of machining of mechanical parts, in particular to a cycloid machining method for a large-allowance casting blank. A datum plane of a casting is determined, the blank allowance thickness of the surface of the casting is determined, a cutter is fed in a spiral cycloid manner according to the blank allowance, and the blank is milled by the cutter in a down-milling manner. When the milling cutter cuts into the workpiece blank, the cutter point cuts into the casting blank, the shearing force generated when the cutter point cuts into the casting blank is obviously smaller than the force generated in the mode that the middle section of a cutting edge cuts into the casting blank, and the impact load in the cutting process is also relatively small. According to the method, the cutter path can be determined, the cutter moves circularly and swings in the direction of a straight line or a circle or the edge of a part, materials of the to-be-cut part in a blank workpiece are divided into cutting layers with the uniform thicknesses in the direction of being perpendicular to the swing direction of the cutter, the cutting layers are cut off layer by layer in the swing process of the cutter, and the phenomena that due to the fact that the blank is uneven, large fluctuation of the cutting force is generated, and vibration in the machining process and the loss of the cutter are generated are avoided.

Description

technical field [0001] The invention relates to the technical field of machining of mechanical parts, in particular to a cycloidal machining method for casting blanks with large margins. Background technique [0002] Machine tools are equipment used to manufacture machine parts, commonly known as metal cutting machine tools, or machine tools for short. The quality of the machine tool itself directly affects the quality of the manufactured machine. There are many aspects to measure the quality of a machine tool, but the main requirements are good craftsmanship, serialization, generalization, high degree of standardization, simple structure, light weight, reliable work, and high productivity. The compound motion of turning to the rotation realizes the cutting of the symmetrical plane on the cylindrical surface, which has high production efficiency. Based on the principle of hypocycloid formation and the principle of machine tool turning plane, the compound motion of machine t...

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Problems solved by technology

[0004] In the existing machining blanks, casting blanks occupy a relatively large proportion. In order to ensure the internal quality of castings, part of the pouring risers are located in the subsequent machining parts. It is uneven and the allowance is quite different. It is easy to form a large number of empty tools when using conventional CNC cutting methods, and the impact between the tool and the workpiece is obvious during the cutting process, resulting in tool loss. Therefore, in CNC machining, how to process this smoothly and efficiently? Large margin uneven blank becomes a difficulty

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