Telescopic extension center for pipe thread lathe

Abstract

The invention discloses a telescopic lengthened centre for a pipe thread cutting machine. The telescopic lengthened centre comprises an outer sleeve and a ball seat connected to the front end of the outer sleeve. A lead screw is arranged in the outer sleeve, a lead screw nut is arranged at the front end of the lead screw, and the lead screw nut is fixedly connected with a centre body; the outer wall of the centre body is sleeved with a conical disc shaft capable of sliding, the conical disc shaft is sleeved with a conical disc, the conical face of the outer wall of the conical disc is in contact with steel balls arranged on the circumference of the ball seat, and the back end of the conical disc shaft is fixedly connected with a handle disc in the outer sleeve through a long handle; and a push rod penetrates a window on the side wall of the outer sleeve to be connected with the handle disc. According to the telescopic lengthened centre, the problem that workpieces cannot be clamped stably when connection threads of the workpieces with the length ranging from 400 mm to 1500 mm are machined on the pipe thread cutting machine is solved, the workpiece machining coaxiality is guaranteed, the machining scope of one same digital controlled lathe is enlarged, the autonomous machining capacity of same-class parts on the pipe thread cutting machine is improved, outer delegation machining is reduced, the machining cost is reduced, and the product quality is guaranteed.

Description

technical field [0001] The invention relates to a telescopic extension tip for a pipe thread lathe, which belongs to the technical field of mechanical manufacturing. Background technique [0002] The length of the spindle hole of the pipe thread lathe is 1700mm, and four-jaw chucks are installed at both ends of the spindle hole, and the diameter of the spindle hole is 354mm. When the length of the workpiece is less than 400mm, one end can be directly clamped and the outer circle of the workpiece can be aligned at the same time before thread processing, which can ensure the coaxiality of the workpiece within 0.05mm. When the length of the workpiece is greater than 1700mm, the chucks at both ends of the machine tool can be used to clamp the workpiece and the two ends can be aligned to ensure the coaxiality requirements. [0003] However, when the length of the workpiece is greater than 400mm and less than 1500mm, if only one end is clamped, the other end is a hanging wall, wh...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a telescopic extension tip for a pipe thread lathe, so as to solve the problem that the workpiece cannot be stably clamped when the workpiece with a length between 400 mm and 1500 mm is processed on the pipe thread lathe, and ensure the accuracy of the workpiece processing. Concentricity, expand the processing range of the same pipe thread lathe, improve the independent processing ability of similar parts on the pipe thread lathe, reduce outsourcing processing, reduce processing costs, and ensure product quality

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