Method for processing screw thread by digital control lathes and screw thread processing tool thereby

Abstract

The invention relates to a method for machining threads by using a numerical control lathe and a thread machining tool thereof; wherein, the method comprises the following steps: (1) a thread machining tool is adopted and clamped on the cutter head of the numerical control lathe, (2) the sleeve of the tool is adhered to the tool body axially and tightly before machining the thread with a thread pitch of T, (3) during the machining, the axial displacement amount of the cutter head is 88 to 98% T / cycle, (4) the thread machining tool comprises a thread machining cutter, a tool body and a sleeve, and (5) the tool body is sleeve-jointed on the outer flank of the sleeve, the tool body and the sleeve can move correspondingly and axially, and the thread machining cutter is clamped on the front end of the sleeve. The machining method has the advantages of completing the screw thread machining of a plurality of thin and long workpieces continuously in one clamping, automatic processing, high degree of automation, high machining quality and stability, less times of cutter loading, low auxiliary time and machining time, high work efficiency, low machining cost, and low labor intensity of operators.

Description

technical field [0001] The invention relates to a processing method of a numerically controlled lathe and a fixture thereof, in particular to a method for processing a thread with a numerically controlled lathe and a thread processing tool thereof. Background technique [0002] At present, when processing a threaded workpiece with a CNC lathe, a special thread turning tool is generally used and controlled by a program. During processing, the workpiece bears a large radial force. If the nominal diameter of the thread of the workpiece is small and the thread length is long, the radial force of the thread turning tool on the workpiece is easy to bend and deform the workpiece, so that the workpiece is scrapped. Therefore, the threaded workpiece processed by CNC lathe generally has a large nominal diameter and a short length. [0003] Simultaneously, the existing numerical control car cannot use the thread turning tool to process the workpiece with a larger diameter shaft shoul...

AI Technical Summary

Problems solved by technology

This operation requires frequent start-up of the machine tool, frequent clamping of the workpiece, and alignment of the workpiece. The entire workpiece cannot complete the required processing procedures to the maximum extent in one clamping, and the processing efficiency is low.

Hand-operated tailstock is a thread processing method for ordinary lathes. It relies on the friction between the outer wall of the clamping part of the thread processing mechanism and the inner hole wall of the tailstock sleeve to transmit power. The contact part between the two is easy to slip, so that the thread is scrapped.

At the same time, if the manual force is uneven during processing, it is easy to make the thread profile uneven, resulting in the scrapping of the workpiece

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