JPS61121852A - Loading device with anti-deflection function - Google Patents

Abstract

PURPOSE:To short replacing time of a work without loading action after retirement of anti-deflection members by providing the members so as to move to the axial direction and determine turning position. CONSTITUTION:A turning shaft 13 is rotatably provided on a position opposed to a cutter table in parallel with an axial core of a work. Automatic core adjusting anti-deflection members 16a, 16b are movable on the turning shaft 13 and integrally rotated. A turning cylinder 14 which is a drive means of the turning shaft 13 turns a work held by the anti-deflection members 16a, 16b to a machining position and delivering position. A cylinder 19 and a piston 20 move the anti-deflection members 16a, 16b to the axial direction so as to insert and extract the work held by the anti-deflection members 16a, 16b in and from a chuck. Claw clutches 17, 18 fix the anti-deflection members 16a, 16b to the anti-deflection action position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for loading and unloading a self-aligning steady rest device in a lathe.

Prior Art Conventionally, in automation specifications for parts machining that require a steady rest in the machining of shaft workpieces, an automatic steady rest device was used as the steady rest, and a loader device used for changing workpieces was dedicated to loading and unloading workpieces.

Problems to be Solved by the Invention For this reason, multiple devices are required, and there are structural restrictions to prevent interference between devices.Furthermore, since the next operation cannot be performed until one device is evacuated, it is necessary to evacuate the steady rest. There is an inconvenience that tools are changed in series, which increases the time required to change workpieces.

Means for Solving the Problem A rotating shaft 15 is provided at a position opposite to the tool post 6 so as to be able to rotate parallel to the axis of the workpiece, and a self-aligning type is movable on the rotating shaft 13 and rotates together. Steady rest member 165Lf16
b, a rotating shaft driving means 14 for rotating the workpiece gripped by the steady rest members 168, 161) between the processing position and the delivery position, and a driving means 14 for the rotation axis for rotating the workpiece gripped by the steady rest members 168, 161), The present invention includes means 19.20 for moving the steady rest member 16av16b in the axial direction for insertion and withdrawal, and means 17.18 for fixing the steady rest member 16&, 16b in the steady rest operating position. An embodiment will be described based on the drawings.

A saddle 3 that is movable in two axes is placed on a horizontal guide surface 2 on a bed 1, a transverse feed table 4 is placed on top of the saddle 3 so as to be movable in the X-axis direction, and a turret 5 is placed on top of the saddle 3. A tool post 6 that rotates around two axes is fixed. Further, the spindle supported on the headstock on the bed 1 is provided with a center 9 on the psychological axis 8 of the chuck 7 and the eight-head stock, which are well known. A stand 11.11 is set up on the bed 1 at a position facing the turret B, and a pivot shaft 13 with a spline cut thereon is supported by a bearing 12.12 so as to be rotatable only. cylinder 14
It is rotatably connected to the output shaft of the motor by means of a key, so that it can be rotated 180 degrees in the forward and reverse directions. A steady rest mounting arm 15 spline-fitted onto the spline of the swing shaft 13 is provided so as to be movable in the axial direction, and a self-aligning roller stop 16 & , 16b are attached. A known self-aligning roller steady rest is used, for example, as shown in Figure 1a of Japanese Patent Publication No. 47-29836.

This device has a roller end that serves as a support point for the workpiece, an angle-shaped cam is fixed in the middle, and the shaft end is connected to the piston of the cylinder mechanism to create a center steady rest that can be moved in the axial direction. The end of the steady rest rod, which has a roller end that handles two points of three-point gripping and rotates at a central pivot point, is kept in constant contact with the angle-shaped cam, and is opened and closed by the same amount as the central steady rest rod advances and retreats. This is the format. A positioning pawl clutch 17 is installed concentrically with the rotation axis on one side of the steady rest mounting arm 15, and a positioning pawl clutch 18 and the steady rest 16a are mounted on opposite sides of the stand 11 and are concentric with the rotation axis 16.

16b is adapted to engage the workpiece at a position where the stop supports the workpiece. Furthermore, a cylinder 19 is attached to the other side of the anti-photograph mounting arm 15 concentrically with the pivot axis, and a piston 20 fitted into this cylinder 19 is fixed to the pivot shaft 13. Therefore, by sending pressurized fluid to either the front or rear chambers of this cylinder 190, the mounting arm 15 moves and the pawl clutches 17, 18 are engaged at one end of the movement. The steady rest mounting arm 15 further includes a steady rest 16 &
In order to stop the rotation of the workpiece, cylinders 21a and 21b are installed in parallel with +16b, with their axes facing the workpiece gripped by the steady rest.
The piston rods 23 & 25b protrude outward from the pistons 22a, 22b fitted in the pistons 22a, 21b and press against the workpiece to stop their rotation.

The workpiece gripped between the action chuck 7 and the center 9! IjR
n stopper 16a grips the pawl clutch 17. j8 is fixed at the meshing position and the piston rond 23& is retracted. When a workpiece change is commanded after the cutting process is completed, the turret 6 is retracted, pressure fluid is sent to the rear chamber of the cylinder 21a, and the piston rond 23& is retracted. 23 & is pressed against the workpiece to stop its rotation. At the same time, the other steady rest 16b, which had been open, closes and grasps the workpiece being conveyed by a conveyor or the like to the front position of the lathe. Open the jaws of chuck 7 and move the psychological axis 8
to retreat. Pressure fluid is sent to the chamber on the psychological axis side of the cylinder 19, and when the cylinder 19 and the mounting arm 15 are moved to the tailstock side and the pawl clutches 17 and 18 are disengaged, the workpiece is moved. Pull it out from 7ri7. Sending pressure fluid to the rotating cylinder 14 and rotating shaft 13. Steady rest mounting arm 15 to 180
The machine is rotated to transport the machined workpiece held by the steady rest 16& to the delivery position, and the new workpiece held by the steady rest 16b to the working position.

Sending pressure fluid to the main shaft side chamber of cylinder 19
9. When the attachment arm 15 is moved toward the spindle and the workpiece is inserted into the chuck 7, the pawl clutches 17 and 18 are engaged, and the psychological shaft 8 is advanced and gripped by the center 9. Open the steady rest 16& and pass the workpiece onto the conveyor. Steady rest 1
While the temperature of 6° C. is applied, the tool post 6 is moved in the X and Z axis directions and cutting is performed with the tool. In this embodiment, the pivot shaft is integrated with the mounting arm 15, and the mounting arm 15 can be freely pivoted by the pivot cylinder 14.

Effects As detailed above, in the present invention, the steady rest member is provided so as to be movable in the axial direction and can be rotated to perform a loading action, so that there is no interference between the steady rest member and the loading device. This eliminates the need for loading operations after retracting the steady rest, which makes the design easier and reduces workpiece exchange time. In addition, the device becomes a single device, which has the effect of reducing costs.

[Brief explanation of drawings]

FIG. 1 is an explanatory longitudinal cross-sectional view of the present device, and FIG. 2 is an explanatory side view.

Claims (3)

[Claims] (1) A self-aligning steady rest member provided on the bed of the lathe at a position facing the tool rest, capable of rotating about an axis parallel to the workpiece axis, and movable in the direction of the rotation axis; a driving means for rotating the steady rest member in order to rotate the workpiece gripped by the steady rest member to a loading position and an unloading position; and a steady rest for inserting and pulling out the workpiece gripped by the steady rest member into a chuck. A loading device with a steady rest function, comprising means for moving a member in the axial direction, and means for fixing the steady rest member at a steady rest position of a workpiece. (2) The loading device with a steady rest function according to claim 1, wherein the steady rest member is provided symmetrically with respect to the rotation axis. (3) A self-aligning steady rest member provided on the bed of the lathe at a position facing the tool rest, capable of rotating around an axis parallel to the workpiece axis, and movable in the direction of the turning axis; a driving means for rotating the steady rest member in order to rotate the workpiece gripped by the steady rest member to a loading position and an unloading position; and a steady rest for inserting and pulling out the workpiece gripped by the steady rest member into a chuck. means for moving the member in the axial direction; means for fixing the steady rest member at a steady rest position of the workpiece; and brake means provided in line with the steady rest member for stopping rotation of the workpiece after machining. Loading device with steady rest function.