US-12623294-B2 - Processing tool

US12623294B2US 12623294 B2US12623294 B2US 12623294B2US-12623294-B2

Abstract

A deburring tool includes a body including a cylinder chamber having a tool holder holding hole, and an anti-rotation body holding hole; a tool holder having an anti-rotation groove and disposed in the cylinder chamber to reciprocate in the cylinder chamber; a first elastic body disposed inside the cylinder chamber to urge the tool holder toward a distal end; a cover disposed outside the body to reciprocate between a detaching position and a processing position, the cover including, a pressing surface that covers the anti-rotation body holding hole at the processing position, and a relief portion; and an anti-rotation body accommodated in the relief portion when the cover is positioned at the detaching position and the tool holder is pulled from the tool holder holding hole.

Inventors

Yusuke YANAGIHARA
Mitsuru Muto

Assignees

SUGINO MACHINE LIMITED

Dates

Publication Date: 20260512
Application Date: 20220928
Priority Date: 20211014

Claims (12)

1 . A processing tool, comprising: a body extending along a body center axis, the body including a cylinder chamber located inside the body and extending along the body center axis, the cylinder chamber having a tool holder holding hole having an opening toward a distal end, and an anti-rotation body holding hole penetrating the body in a radial direction; a tool holder having an anti-rotation groove formed on an outer peripheral of the tool holder, the tool holder disposed in the cylinder chamber, the tool holder configured to reciprocate in the cylinder chamber; a first elastic body disposed inside the cylinder chamber, the first elastic body configured to urge the tool holder toward the distal end; a cover disposed outside the body, the cover configured to reciprocate along the body center axis between a detaching position and a processing position, the cover including, a pressing surface configured to cover the anti-rotation body holding hole at the processing position, and a relief portion recessed from an inner side of the cover to radially outward; and an anti-rotation body held in the anti-rotation body holding hole, the anti-rotation body configured to move between the anti-rotation groove and the pressing surface, the anti-rotation body configured to be accommodated in the relief portion when the cover is positioned at the detaching position and the tool holder is pulled from the tool holder holding hole; wherein sidewalls of the anti-rotation body holding hole are inclined in a rotation direction of the processing tool with respect to a straight line that defines the radial direction; and wherein the anti-rotation body has a spherical outer surface and the anti-rotation body holding hole has an anti-rotation body holding surface therein with an anti-rotation body retaining portion, the anti-rotation body retaining portion having a partially spherical surface that conforms to the spherical outer surface of the anti-rotation body such that, when the cover is positioned at the detaching position and the tool holder is pulled from the tool holder holding hole, the inclined sidewalls of the anti-rotation body holding hole and the partially spherical surface of the anti-rotation body retaining portion prevent the anti-rotation body from falling into the body.
2 . The processing tool according to claim 1 , wherein the anti-rotation body holding surface is inclined with respect to a straight line that passes through a center of the anti-rotation body and that is perpendicular to the body center axis.
3 . The processing tool according to claim 1 , wherein a center of the anti-rotation body is positioned in the anti-rotation body holding hole with the anti-rotation body being in contact with the pressing surface of the cover and the anti-rotation groove.
4 . The processing tool according to claim 1 , wherein the anti-rotation body is a ball.
5 . The processing tool according to claim 1 , wherein the anti-rotation body is a pin.
6 . The processing tool according to claim 1 , wherein the anti-rotation groove extends parallel to the body center axis.
7 . The processing tool according to claim 1 , wherein the anti-rotation groove is spiral shape that advances toward a basal end in a direction opposite to a rotational direction of a deburring tool.
8 . The processing tool according to claim 1 , further comprising: a pusher configured to reciprocate inside the cylinder chamber to urge the tool holder toward a the distal end.
9 . The processing tool according to claim 1 , further comprising: an elastic body chamber located between the body and the cover; and a second elastic body disposed inside the elastic body chamber to urge the cover from the detaching position to the processing position.
10 . The processing tool according to claim 1 , wherein a tool is detachably attached to the tool holder.
11 . The processing tool according to claim 1 , further comprising: a shank extending along the body center axis and connected to the body.
12 . The processing tool of claim 1 , wherein the anti-rotation body retaining portion comprises a first anti-rotation body retaining portion with a partially spherical surface behind the anti-rotation body with respect to the rotation direction and a second anti-rotation body retaining portion with a partially spherical surface forward of the anti-rotation body with respect to the rotation direction, the first anti-rotation body retaining portion being larger than the second anti-rotation body retaining portion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of priority to Japanese Patent Application No. 2021-168775, filed on Oct. 14, 2021, the entire contents of which are hereby incorporated by reference. BACKGROUND 1. Technical Field The present invention relates to a processing tool. 2. Description of the Background Conventionally, a deburring tool capable of adjusting a pressing force of a cutting tool against a workpiece has been proposed (for example, Japanese Patent No. 6025580). The conventional deburring tool includes: a stem received in a shank in an axially movable manner, a cutting tool guide means for guiding a cutting tool holding means in an axially movable manner relative to the stem to rotate in a rotational direction integrally with the stem, a spring member for urging the cutting tool holding means in a direction of pressing the workpiece against the stem, and an initial length adjusting means for adjusting the pressing force by the spring member by adjusting the initial length of the spring member. BRIEF SUMMARY An object of the present invention is to provide a processing tool having a simple structure, to which a tool holder is detachably attachable, and capable of sliding a tool in an axial direction with respect to a body. A first aspect of the present invention provides a processing tool, including: a body extending along a body center axis, the body including a cylinder chamber located inside the body and extending along the body center axis, the cylinder chamber having a tool holder holding hole having an opening toward a distal end, andan anti-rotation body holding hole radially penetrating the body; a tool holder having an anti-rotation groove formed on an outer peripheral of the tool holder, the tool holder disposed in the cylinder chamber, the tool holder configured to reciprocate in the cylinder chamber;a first elastic body disposed inside the cylinder chamber, the first elastic body configured to urge the tool holder toward a distal end;a cover disposed outside the body, the cover configured to reciprocate along the body center axis between a detaching position and a processing position, the cover including, a pressing surface configured to cover the anti-rotation body holding hole at the processing position, anda relief portion recessed from an inter side of the cover to radially outward; and an anti-rotation body held in the anti-rotation body holding hole, the anti-rotation body configured to move between the anti-rotation groove and the pressing surface, the anti-rotation body configured to be accommodated in the relief portion when the cover is positioned at the detaching position and the tool holder is pulled from the tool holder holding hole. The processing tool is, for example, a deburring tool, a drilling tool, a threading tool, or a brush. The deburring tool is attached to the processing machine to remove burrs adhered to the workpiece. The processing machine is, for example, a robot having a tool spindle, a lathe, a machining center, and a turning center. The shank of the deburring tool is attached to a tool spindle or a tailstock, and the entire deburring tool rotates with the tool spindle. For convenience of explanation, a side to which a cutting tool or a brush is attached is referred to as a distal end side, and a side on which a shank is disposed is referred to as a basal end side. The body, the pusher, the tool holder and the tool are arranged on a shank axis which is a central axis of the shank. The anti-rotation body is held in the anti-rotation body holding hole. The anti-rotation body transmits the rotational torque applied to the body to the tool holder via the anti-rotation groove. The pusher and the tool holder are urged toward the distal end by the restoring force of the first elastic body. One or more anti-rotation grooves are formed on the tool holder. The anti-rotation groove is formed on an outer peripheral surface of the tool holder. The anti-rotation groove is formed parallel to or spirally with the shank axis. The anti-rotation groove may have appropriately any shape in which the anti-rotation body is slidable. The plurality of anti-rotation grooves are arranged in a rotating symmetry. Preferably, a plurality of anti-rotation grooves are formed on the tool holder. The body has the same number of the anti-rotation body holding holes as the anti-rotation body. The anti-rotation body holding hole penetrates the body. The anti-rotation body holding hole has an anti-rotation body holding surface. The shape of the anti-rotation body holding surface is a cylindrical surface or a conical surface that decreases in diameter toward the inner peripheral side. Preferably, the anti-rotation body holding surface is a cylindrical surface. The anti-rotation body holding surface is inclined with the rotation direction of the tool with respect to the radial direction. A cover covering the outer peripheral surf