A method of turning tooth bottom thread by using groove cutter

Abstract

The invention relates to a method for turning root threads through a grooving cutter. The method comprises the following steps of (1) fixing a workpiece, specifically, clamping the workpiece onto a lathe bed; (2) selecting the cutter, specifically, selecting the grooving cutter with the cutter width less than the width of the thread roots; (3) writing a program, specifically, calculating the Z-axis per-cut offset required for generating a thread angle through the formula: Zi=Xj x tga / 2, wherein A represents the Z-axis of a numerical control lathe, i represents the movement amount of the Z-axis, X represents the X-axis of the numerical control lathe, j represents the movement amount of the X-axis, and tga represents the tangent value of the angle alpha; (4) aligning the cutter, specifically, adjusting the relative distance between the cutter and the workpiece; (5) conducting rough machining through a layering method; and (6) conducting finish machining through a left-right interpolationcutter feeding method. According to the method, the root threads are machined through the grooving cutter; the working efficiency is improved while the machining precision is improved, the machiningcost is saved, and the method can be extensively applied to the technical field of numerical control lathe machining.

Description

technical field [0001] The invention relates to the technical field of numerical control lathe processing, in particular to a method for turning tooth bottom threads by using a groove cutter. Background technique [0002] At present, the following three processing methods are mainly used for CNC machining in the industrial field: one is the extrusion processing method, which is only suitable for the processing of large quantities of small modulus worms and small pitch thread parts, the equipment is expensive, and the price of extrusion wheels is high. The price of one pair is about tens of thousands of yuan; the second is turning on a CNC lathe, using a forming tool for turning. This processing method has low production efficiency and poor quality, and requires a high technical level of the operator. The third is to use whirlwind milling for processing, which is also the most efficient processing method at present, and can avoid the phenomenon of cutting knives. However, the...

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Problems solved by technology

[0002] At present, the following three processing methods are mainly used for CNC machining in the industrial field: one is the extrusion processing method, which is only suitable for the processing of large quantities of small modulus worms and small pitch thread parts, the equipment is expensive, and the price of extrusion wheels is high. The price of one pair is about tens of thousands of yuan; the second is turning on a CNC lathe, using a forming tool for turning. This processing method has low production efficiency and poor quality, and requires a high technical level of the operator. The third is to use whirlwind milling for processing, which is also the most efficient processing method at present, and can avoid the phenomenon of cutting knives. However, the price of each related equipment is about 10 million yuan, and The price of a milling head is 300,000 to 500,000 yuan, the cost is relatively high, and the processing requirements for 40-degree metric worm, 29-degree imperial worm, 30-degree internal and external trapezoidal thread, zigzag thread and various special-shaped thread parts are different. The tools are used to complete, and the number of tools used for processing varies