Cycloid machining method for large-allowance casting blank

Abstract

The invention relates to the technical field of mechanical part machining, in particular to a cycloid machining method for a large-allowance casting blank. A datum plane of a casting is determined, and the blank allowance thickness of the casting surface is determined; a cutter is fed in a spiral cycloid mode according to the blank allowance, wherein the blank is milled by the cutter in a down-milling manner; the cutter tip is enabled to cut into the casting blank when the milling cutter is driven to cut into the workpiece blank; and the shearing force generated by the cutter tip driven to cut into the casting blank is obviously smaller than that generated by the middle section of the cutting edge driven to cut into the casting blank, and the impact load in cutting is further smaller. According to the cycloid machining method, a cutter path can be determined, and the cutter is moved circularly and swung along a straight line, a circle or a component edge; materials to be cut off in a blank workpiece are divided into cutting layers with uniform thickness in the direction perpendicular to the swinging direction of the cutter, and the materials are cut off layer by layer in the swinging process of the cutter; and the situation that large fluctuation is generated due to unevenness of the blank and consequently vibration and cutter loss in the machining process are caused is avoided.

Description

technical field [0001] The invention relates to the technical field of machining of mechanical parts, in particular to a trochoidal machining method for a large allowance casting blank. 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 machine made. 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 in the direction of rotation realizes the cutting of the symmetrical plane on the cylindrical surface, which has high production efficiency. The formation principle of the hypocycloid and the principle of the machine tool turning plane are analyzed, and the compound motion of ...

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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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