Numerical control turning automatic chip breaking method based on high-pressure cooling system

Abstract

The invention discloses a numerical control turning automatic chip breaking method based on a high-pressure cooling system, which solves the problem that the probability of winding a tool and a workpiece during cutting is high due to the fact that a metallic material high in yield strength is difficult to break in the numerical control turning process. In the plastic material turning process, high-pressure cooling liquid which is used for breaking chippings is jet to the rake face and a cutting place of a turning tool, and the yield strength of the plastic material [Sigma]s is greater than 700MPa. According to the method, through the improvement on a cooling liquid system and a tool-changing system of a common numerical control lathe, cooling liquid discharged from a machine tool cooling liquid pump is shunted through a shunting device, the pressure of the cooling liquid is improved by a high pressure plunger pump, and precision jetting of the cooling liquid is completed by a flow-jetting tool. The cooling liquid system improves high pressure resistance of the machine tool cooling liquid pump and a tool cooling liquid pipeline, the high-pressure cooling liquid is controlled to be precisely jet to the rake face of the turning tool, so that the chippings are broken to be short coil chippings, automatic chip breaking of numerical control turning of the metallic material high in yield strength is realized, and the surface roughness of the workpiece can be improved.

Description

technical field [0001] The invention belongs to the technical field of automatic turning, and in particular relates to an automatic chip breaking method for numerically controlled turning based on a high-pressure cooling system. Background technique [0002] Structural rotating parts with high yield strength are often used in the defense industry such as aerospace, ordnance and weapons, and have the characteristics of difficult control of processing deformation and high processing quality requirements. For the yield strength σ s For metal workpieces >700MPa, advanced CNC lathes can achieve better motion accuracy, but due to the extremely high yield strength of these metal materials, it is difficult for chips during turning to be automatically broken by optimizing the cutting parameters. In the CNC turning process of metal materials with high yield strength, the phenomenon of winding tools and workpieces often occurs, which directly leads to increased tool wear and poor s...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the CNC turning of high yield strength metal materials, the present invention provides an automatic chip breaking method for CNC turning based on a high-pressure cooling system, a cutting fluid system and a tool changing system of a CNC lathe, and realizes directional spraying of coolant with specific high-pressure properties , to solve the problem that the metal material with high yield strength is difficult to break during the CNC turning process, and the cutting tool and workpiece often appear to be wound around the cutting tool, which affects the surface quality of the workpiece machining

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