Chamfering device and chamfering method

Patent metadata

Field	Value
Publication number	US-10926340-B2
Application number	US-201916445460-A
Country	US
Kind code	B2
Filing date	Jun 19, 2019
Priority date	Jun 19, 2018
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A chamfering device includes: a main body including, at a proximal end side thereof, a shank to be attached to a main shaft of a machine tool, the main body including, at a distal end side thereof, a shaft portion extending in a rotational axis direction; a movable body whose proximal end portion is mounted to the shaft portion, the movable body being configured to rotate together with the shaft portion and be movable in the rotational axis direction; an urging member configured to urge the movable body in a direction toward the distal end of the main body; a chamfering tool mounted to a distal end portion of the movable body and configured to rotate together with the movable body to perform chamfering on an edge portion of a workpiece; and a following member mounted to the movable body such that a position of the following member relative to the movable body in the rotational axis direction is invariable and the following member is rotatable relative to the movable body, the following member being configured such that a distal end thereof comes into contact with a surface of the workpiece.

First claim

What is claimed is:

1. A chamfering device configured to be attached to a rotatable main shaft of a machine tool and to extend, along a rotational axis of the main shaft, from a proximal end to an opposite distal end, the chamfering device comprising:
a main body including, at a proximal end side thereof, a shank to be attached to the main shaft of the machine tool, the main body including, at a distal end side thereof, a shaft portion whose longitudinal axis extends in a direction of the rotational axis;
a movable body whose proximal end portion is mounted to the shaft portion so as to receive the shaft portion therein, the movable body being configured to rotate together with the shaft portion and be movable relative to the main body in the rotational axis direction;
an urging member configured to urge the movable body in a direction toward the distal end of the chamfering device;
a chamfering tool mounted to a distal end portion of the movable body and configured to rotate together with the movable body to perform chamfering on an edge portion of a workpiece; and
a following member mounted to the movable body such that a position of the following member relative to the movable body in the rotational axis direction is invariable and the following member is rotatable relative to the movable body, the following member being configured such that a distal end thereof comes into contact with a surface of the workpiece.

2. The chamfering device according to claim 1 , wherein
the following member includes a distal end portion that comes into contact with the surface of the workpiece, the distal end portion being ring-shaped and surrounding an outer periphery of the chamfering tool.

3. The chamfering device according to claim 1 , wherein
the shaft portion is configured as a spline shaft, and
the proximal end portion of the movable body, the proximal end portion being mounted to the shaft portion, is configured as a spline nut.

4. The chamfering device according to claim 1 , wherein
the main body includes:
a tubular portion disposed around the shaft portion and around the urging member, the tubular portion being configured such that the movable body is fitted therein such that the movable body is slidable; and
a communication passage through which a space formed inside the tubular portion between the main body and the movable body communicates with an outside, the communication passage allowing air or a liquid to flow into and out of the space.

5. A chamfering method executed by using the chamfering device according to claim 1 , the chamfering method comprising:
performing cut-out processing of cutting a predetermined portion away from a plate-shaped piece of work by moving a cutting tool attached to the machine tool relative to the plate-shaped piece of work to form the workpiece; and then
attaching the chamfering device, instead of the cutting tool, to the machine tool, and performing chamfering on the edge portion of the workpiece, the edge portion being formed when the predetermined portion is cut away from the piece of work, the chamfering being performed such that a movement path of the chamfering tool of the chamfering device as seen in the rotational axis direction coincides with a movement path of the cutting tool as seen in the rotational axis direction when the cut-out processing is performed.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Shimada Masahiro

Classifications

• B23B2220/04

  Chamferring (B23B2220/28 takes precedence) · CPC title

• Y10T409/303808

  including infeeding · CPC title

• B23C2255/08

  Limitation of depth of cut · CPC title

• Y10T409/308624

  with limit means to aid in positioning of cutter bit or work [e.g., gauge, stop, etc.] · CPC title

• B23B31/083

  axially · CPC title