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1. (WO2018196872) SHAFT THREAD MACHINING LIMITING DEVICE OF THREAD ROLLING MACHINE

Pub. No.:    WO/2018/196872    International Application No.:    PCT/CN2018/085045
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sun Apr 29 01:59:59 CEST 2018
IPC: B21H 3/04
Applicants: YANCHENG BAODING ELECTRIC TOOLS CO., LTD.
盐城宝鼎电动工具有限公司
Inventors: YANG, Zhaoguo
杨兆国
Title: SHAFT THREAD MACHINING LIMITING DEVICE OF THREAD ROLLING MACHINE
Abstract:
A shaft thread machining limiting device of a thread rolling machine, comprising a base frame, a limiting block (5), a movable positioning plate (1), a hinge pin (8), a spring I, and a spring II; the limiting block is of a plate structure; a through hole (14) is formed in the center of the limiting block, and the hinge pin is inserted and fixed in the through hole; an arc-shaped groove (7) is formed in one side of the limiting block, and a positioning groove (13) is formed in the other side of the limiting block; two ends of the hinge pin are respectively inserted in pin holes formed in the middle of the upper part of a side plate I (2) and the middle of the upper part of a side plate II (3); the movable positioning plate is of an L-shaped plate structure; one end of the movable positioning plate of the L-shaped plate structure is located in a horizontal open groove formed in the side plate I and is rotatably connected to the horizontal open groove; one end of the spring I is provided on the lower portion of the other side of the limiting block, and the other end of the spring I is provided on the lower portion of a baffle (9); one end of the spring II is provided in the middle of the movable positioning plate of the L-shaped plate structure, and the other end of the spring II is provided on the side plate II. By means of the limiting device, the accuracy of a long shaft at the radial position can be guaranteed and thus thread machining precision is ensured.