JP3598355B2 - Floating chuck - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a floating chuck to be mounted on a machining center M and used for machining a hole with high precision.
[0002]
[Prior art]
In the conventional reaming, a spiral processing flaw is left on the inner diameter, and it is difficult to obtain a certain surface roughness or more. Therefore, the labor of manual lapping work (mirror finishing) was forced.
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of such a conventional situation, and provides a so-called cutter machine by imparting a horizontal rotation motion and a thrust vertical oscillation motion to a diamond wrapper mounted on a tool holder. The present invention provides a floating chuck capable of finishing an inner diameter with a high surface roughness while completely removing a workpiece.
[0004]
[Means for Solving the Problems]
To achieve the above object, the present invention is provided with a rotating body 2 and the positioning pin 9 which is inserted into the positioning block m2 which is fixed to the end of the machining center M with a holding portion 2a to be mounted on the main shaft m1 of machining center M The floating chuck 1 is constituted by the casing 1a .
[0005]
Then, the tip rotating body 2 which is journalled through a metal bearing 12 in the casing 1a, a metal bearing 11 rotor 3 to the rotating main shaft m 1 tool holder 6 and pin 4 stops for mounting the diamond wrapper 7 And in the thrust direction via a return spring.
[0006]
A horizontal hole 3a is provided in an intermediate portion between the rotary body 2 and the rotor 3 so that the tip of an operating claw 5 having an intermediate fulcrum 5a faces the hole 3a on the rotary body 2 side. 5 is characterized in that the base end portion of the diamond wrapper 7 is brought into contact with a slope cam 14 provided on the outer ring portion of the metal bearing 12 via a bearing 13 so that the diamond wrapper 7 is given a rotational motion and a vertical rocking motion.
[0007]
[Action]
When the floating chuck 1 having the above configuration is operated, the rotating main body 2, the rotor 3, the connecting pin 4, the operating claw 5 having the intermediate fulcrum 5a, and the tool holder 6 are connected via respective bearings and metal bearings. Since it is rotatably supported and has a small gap S between the tool holder 6 and the spring pressing member 8a, first, the diamond wrapper 7 mounted on the tool holder 6 follows the hole of the workpiece and flows. -
[0008]
At the same time, the bearing 13 attached to the base end portion of the rotating operating claw 5 slides on the inclined cam 14 provided on the outer ring portion of the metal bearing 12, so that the operation is performed as shown in FIG. The pawl 5 moves up and down about the intermediate fulcrum 5a to cause the rotor 3 to swing in the thrust direction.
That is, a rotational motion and a vertical swing motion are imparted to the diamond wrapper 7 by the simultaneous movement of these two operations.
[0009]
By removing the floating chuck 1 from the spindle m1 of the machining center M, the positioning pin 9 is removed from the positioning block m2 at the spindle end, the stopper 2c enters the groove of the positioning collar 2b, and the rotating body 2 and the casing Thing 1a is fixed.
[0010]
【The invention's effect】
As a result, the cutting process can be performed while imparting the horizontal rotation motion and the vertical swinging motion in the thrust direction to the diamond wrapper, and the inner surface finish with high surface roughness while completely removing the spiral cutter mark. Is possible.
If the diamond wrapper has a mode in which the blade diameter can be freely adjusted, the hole diameter can be set within an appropriate tolerance range.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
In FIG. 1, reference numeral 1 denotes a floating chuck comprising a rotary body 2 having a holding portion 2a mounted on a spindle m1 of a machining center M and a positioning pin 9 inserted into a positioning block m2 at the end of the spindle.
More specifically, when the stopper 2c comes off from the groove of the positioning collar 2b of the rotary main body 2, the rotary main body 2, the rotor 3, and an operating claw 4, a connecting pin 5, and a tool holder 6, which will be described later, respectively become It is configured to freely rotate interlockingly through a bearing.
[0012]
A tool holder 6 for mounting a diamond wrapper 7 is mounted on the tip of the rotary body 2 via a metal bearing 11 and a return spring 8 in the thrust direction. A spring pressing member 8a is swingably fitted around the outer periphery of the tool holder with a slight gap S secured between the tool holder 6 and the tool.
[0013]
Further, a horizontal hole 3a is provided in an intermediate portion between the rotating main body 2 and the rotor 3 so that the tip of the operating claw 5 having the intermediate fulcrum 5a faces the hole 3a. The base end is brought into contact with a slope cam 14 provided on an outer ring portion of the metal bearing 12 via a bearing 13.
That is, with these configurations, the diamond wrapper 7 is provided with a horizontal rotational motion and a smooth vertical oscillating motion in the thrust direction.
[Brief description of the drawings]
FIG. 1 is a side view. FIG. 2 is a vertical side view. FIG. 3 is an enlarged partial side view of an essential part. FIG. 4 is a cross-sectional plan view of FIG. 1A-A.
DESCRIPTION OF SYMBOLS 1 Floating chuck 2 Rotating main body 3 Rotor 3a Drilling hole 4 Connecting pin 5 Working claw 5a Intermediate fulcrum 6 Tool holder
7 Diamond Wrapper
8 Return spring 8a Spring pressing member S Clearance 9 Positioning pin 11 Metal bearing 12 Slope cam 13 Bearing 14 Slope cam

Claims (1)

A rotary body (2) having a holding portion (2a) to be mounted on a spindle (m1) of the machining center (M) and a positioning pin (9) inserted into a positioning block (m2) fixed to an end of the machining center (M ). In a floating chuck (1) comprising a casing (1a) provided with a tool holder (6), a diamond wrapper is mounted on the tip of a rotating body (2) which is mounted on a casing (1a) via a metal bearing (12). ) Is stopped by a pin (4) and a rotor (3) for rotating in the same direction as the main shaft (m 1 ) is supported via a metal bearing (11) and a thrust direction via a return spring. and actuation pawl having a rotor (3) intermediate fulcrum (5a) in the horizontal direction of the vent holes (3a) and provided rotatable body (2) side of the vent hole (3a) in the intermediate portion of the ( ), And the base end of the operating claw (5) is brought into contact with a slope cam (14) provided on the outer ring portion of the metal bearing (12) via a bearing (13) to form a diamond wrapper. (7) A floating chuck (1) characterized in that a rotary motion and a vertical swing motion are imparted to (7).

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