Method for processing coarse-pitch triangular-cone thread

Abstract

The invention discloses a method for processing coarse-pitch triangular-cone thread, and such coarse-pitch triangular-cone thread is processed by using the point of a cutter to process point by point and layer by layer along the thread form. The thread angle that is processed by the processing method of coarse-pitch triangular-cone thread is formed by using the point of the cutter to process point by point and layer by layer, therefore the depth of each later can be adjusted according to the hardness of the processing material so as to reduce the load of the cutter and to effectively avoid the cutter shaking generated during processing according to the traditional G76 thread processing command; moreover, this processing method guarantees no normally-seen shock pattern on the surface of the thread. Meanwhile, the method also guarantees constant load for the cutter so as to prolong the service life of the cutter to a certain extent. Moreover, the angle of the cutter is not required since this method processes cutting only by the cutter point; when the point of the cutter is abraded, which can be reused after simply repairing and sharpening the cutter point so as to reduce the processing cost effectively.

Description

technical field [0001] The invention relates to a thread processing method, in particular to a large-pitch triangular cone thread processing method. Background technique [0002] The essence of thread machining on a CNC lathe is the process of machining special-shaped spiral grooves through the synchronous rotation of the tool and the spindle. The shape of the thread is mainly determined by the cutting tool and the installation position, and the processing speed is controlled by the programming feed rate. The thread processing feed rate in the programming is the thread lead, not the pitch. In the process of thread processing, as the depth of cut increases, the cutting load on the insert becomes larger and larger. As the cutting load increases, the insert is prone to vibration during the cutting process, and vibration marks appear on the thread surface. For this it is necessary to maintain a constant load on the blade. [0003] For large-pitch threads, the G76 command can b...

AI Technical Summary

Problems solved by technology

For large-pitch threads, when the thread depth is large and the load on the insert is unbearable, the tool may collapse, or the position of the tool may be changed, resulting in disordered or rotten teeth, especially for inner hole threads. processing

Therefore, for materials with a certain hardness, it is difficult to meet the needs with the G76 command due to the increase in the cutting load of the blade.

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