JPS634201U

JPS634201U -

Info

Publication number: JPS634201U
Application number: JP9861586U
Authority: JP
Priority date: 1986-06-27
Filing date: 1986-06-27
Publication date: 1988-01-12
Anticipated expiration: 2001-06-27
Also published as: JPH067843Y2

Description

[Brief explanation of drawings]

第１図は本考案の短尺鋼管加工用センタ保持具
の自動交換装置の側面断面図を示し、第２図は本
考案の短尺鋼管加工用センタ保持具の自動交換装
置が使用される鋼管加工用の工作機械の全体側面
図を示し、第３図は第２図におけるＡ矢視図を示
す。１……短尺鋼管加工用センタ保持具の自動交換
装置、４……係合部材（鋼球）、７……センタ保
持具、８……センタ、１４……ロツド、１６……
伝達部材、１８……押出し部材、２０……把持部
材、２５……押圧子、３３……センサ、５０……
ベツド、５２，５３……チヤツク、５５……交換
アーム、５６……マガジン、５８……芯押し台、
５９……振止め台、６０……移動台、６７……タ
レツト刃物台、７０……中空主軸。 Fig. 1 shows a side sectional view of the automatic exchange device for center holders for machining short steel pipes according to the present invention, and Fig. 2 shows the apparatus for machining steel pipes in which the automatic exchange device for center holders for machining short steel pipes according to the present invention is used. Fig. 3 shows a side view of the entire machine tool, and Fig. 3 shows a view taken in the direction of arrow A in Fig. 2. DESCRIPTION OF SYMBOLS 1... Automatic exchange device for a center holder for short steel pipe processing, 4... Engaging member (steel ball), 7... Center holder, 8... Center, 14... Rod, 16...
Transmission member, 18... Pushing member, 20... Gripping member, 25... Presser, 33... Sensor, 50...
Bed, 52, 53...chuck, 55...exchange arm, 56...magazine, 58...tailstock,
59... Steady rest base, 60... Moving base, 67... Turret tool rest, 70... Hollow main shaft.

Claims

[Scope of utility model registration request]

A hollow main shaft rotatably supported by a housing placed on the bed, a chuck having a through hole provided at the end of the hollow main shaft, and a chuck formed in the bed facing the chuck and extending in the axial direction of the main shaft. A tailstock placed on a guiding surface to guide the chuck, a steady rest rest placed on the guiding surface of the bed between the tailstock and the chuck, and a plane including the spindle axis. In a steel pipe processing machine tool having a turret tool rest movably provided on a bed, a spindle indexing device for indexing the hollow spindle, a tapered portion formed in a through hole of the chuck, and a tapered hole portion of the chuck. an engaging member provided so as to be freely protrusive and retractable in the radial direction, and an engaging portion provided at a position facing the engaging member, and forming a tapered outer diameter portion that can be inserted into the tapered hole portion of the chuck. At the same time, a center holder having a center provided at the bottom of the inner diameter of the hole, an exchange arm provided at one end with a gripping member inserted into the center holder hole and pressed and gripped in the radial direction, and an exchange arm provided at the other end of the exchange arm. a support base attached to the side wall of the housing for supporting an operating shaft that rotates the exchange arm in a direction intersecting the main shaft and is movable back and forth in the direction of the main shaft axis; A push-out member is inserted and fitted so as to be movable forward and backward in the direction of the spindle axis in order to press the rear of the center holder that has been attached, and the chuck is indexed to a predetermined position by the spindle indexing device provided on the housing side, and the push-out member and An automatic exchange device for a center holder for processing short steel pipes, comprising a pressing device that engages with a pressing action when they match and applies a pressing force to push out the extruding member.