Wire electric discharge machining apparatus

Patent metadata

Field	Value
Publication number	US-12594615-B2
Application number	US-202218072708-A
Country	US
Kind code	B2
Filing date	Dec 1, 2022
Priority date	Dec 16, 2021
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A wire electric discharge machining apparatus includes a wire electrode and upper and lower guide devices guiding the wire electrode, and includes: a power conductor moving in a first direction as a horizontal axis direction and supplying power by contacting the wire electrode; and a fixing device fixing the power conductor in the lower guide device and switchable between a fixed state, in which a movement of the power conductor relative to the lower guide device in a second direction as another horizontal axis direction orthogonal to the first direction is not possible, and a non-fixed state in which such relative movement is possible. The wire electric discharge machining apparatus includes: a pressing device, movable relative to the lower guide device and pressing the power conductor in the non-fixed state to move in the second direction; and a movement device, moving the pressing device relative to the lower guide device.

First claim

What is claimed is:

1 . A wire electric discharge machining apparatus, comprising a wire electrode, an upper guide, and a lower guide device,
wherein the upper guide and the lower guide device are respectively disposed on an upper side and a lower side of a workpiece to sandwich the workpiece along a vertical direction, and guide the wire electrode, the lower guide device comprises a power conductor, and a fixing device fixing the power conductor at a predetermined position in the lower guide device, the power conductor moves in a first direction that is a horizontal axis direction and supplies power by contacting the wire electrode, the fixing device is configured to be switchable between a fixed state, in which a relative movement of the power conductor with respect to the lower guide device in a second direction that is another horizontal axis direction orthogonal to the first direction is not possible, and a non-fixed state in which the relative movement of the power conductor with respect to the lower guide device in the second direction is possible, and the wire electric discharge machining apparatus comprises: a pressing device comprising a pressing pin, configured to be relatively movable with respect to the lower guide device and press the power conductor in the non-fixed state to move in the second direction; and a movement device, relatively moving the pressing device with respect to the lower guide device, wherein the fixing device comprises a power cylinder and a biasing member, the biasing member is disposed to bias the power conductor in the first direction, in the fixed state, the power cylinder resists a biasing force of the biasing member to push the power conductor toward the wire electrode in the first direction and fix the power conductor, and in the non-fixed state, the biasing member pushes the power conductor away from the wire electrode in the first direction.

2 . The wire electric discharge machining apparatus as claimed in claim 1 ,
wherein the fixing device is configured to be able to reciprocally move the power conductor in the first direction.

3 . The wire electric discharge machining apparatus as claimed in claim 1 ,
wherein the lower guide device comprises a guide block, the guide block accommodates the power conductor in an accommodation space formed in the guide block, and in the fixed state, the power cylinder pushes the power conductor to abut against a wall surface of the accommodation space and fixes the power conductor.

4 . The wire electric discharge machining apparatus as claimed in claim 1 ,
wherein the pressing device comprises: a body part linked to the movement device; and a pressing pin provided continuously from the body part, and protruding in a direction of the second direction from the body part so that a tip of the pressing pin is abuttable against the power conductor in the lower guide device.

5 . The wire electric discharge machining apparatus as claimed in claim 4 ,
wherein the pressing pin is provided to be movable to a retracted position not interfering with the lower guide device during electric discharge machining of the workpiece.

6 . The wire electric discharge machining apparatus as claimed in claim 4 ,
wherein in the pressing device, the pressing pin is set as a first pressing pin and the body part is set as a first body part, the pressing device further comprises: a second body part linked to the movement device; and a second pressing pin, provided continuously from the second body part, and protruding in an other direction of the second direction from the second body part, so that a tip of the second pressing pin is abuttable against the power conductor in the lower guide device, and the first pressing pin and the second pressing pin are disposed to sandwich the power conductor in the second direction.

7 . The wire electric discharge machining apparatus as claimed in claim 1 ,
wherein the upper guide comprises a power conductor and a fixing device, the power conductor moves in a third direction that is a horizontal axis direction and supplies power by contacting the wire electrode, the fixing device is configured to be switchable between a fixed state, in which a relative movement of the power conductor with respect to the upper guide in a fourth direction that is another horizontal axis direction orthogonal to the third direction is not possible, and a non-fixed state in which the relative movement of the power conductor with respect to the upper guide in the fourth direction is possible, and the wire electric discharge machining apparatus comprises: a pressing device, configured to be relatively movable with respect to the upper guide and press the power conductor in the non-fixed state to move in the fourth direction; and a movement device, relatively moving the pressing device with respect to the upper guide.

8 . A wire electric discharge machining apparatus, comprising a wire electrode, an upper guide, and a lower guide device,
wherein the upper guide and the lower guide device are respectively disposed on an upper side and a lower side of a workpiece to sandwich the workpiece along a vertical direction, and guide the wire electrode, the lower guide device comprises a power conductor, and a fixing device comprising a power cylinder and fixing the power conductor at a predetermined position in the lower guide device, the power conductor moves in a first direction that is a horizontal axis direction and supplies power by contacting the wire electrode, the fixing device is configured to be switchable between a fixed state, in which a relative movement of the power conductor with respect to the lower guide device in a second direction that is another horizontal axis direction orthogonal to the first direction is not possible, and a non-fixed state in which the relative movement of the power conductor with respect to the lower guide device in the second direction is possible, and the wire electric discharge machining apparatus comprises: a pressing device, configured to be relatively movable with respect to the lower guide device and press the power conductor in the non-fixed state to move in the second direction; and a movement device, relatively moving the pressing device with respect to the lower guide device, wherein the pressing device comprises: a body part linked to the movement device; and a pressing pin provided continuously from the body part, and protruding in a direction of the second direction from the body part so that a tip of the pressing pin is abuttable against the power conductor in the lower guide device, wherein in the pressing device, the pressing pin is set as a first pressing pin and the body part is set as a first body part, the pressing device further comprises: a second body part linked to the movement device; and a second pressing pin, provided continuously from the second body part, and protruding in an other direction of the second direction from the second body part, so that a tip of the second pressing pin is abuttable against the power conductor in the lower guide device, and the first pressing pin and the second pressing pin are disposed to sandwich the power conductor in the second direction.

9 . The wire electric discharge machining apparatus as claimed in claim 8 ,
wherein the fixing device is configured to be able to reciprocally move the power conductor in the first direction.

10 . The wire electric discharge machining apparatus as claimed in claim 8 ,
wherein the pressing pin is provided to be movable to a retracted position not interfering with the lower guide device during electric discharge machining of the workpiece.

11 .

Assignees

• Sodick Co Ltd

Inventors

• Inoue Hirotoshi

Classifications

• B23H11/003

  Mounting of workpieces, e.g. working-tables · CPC title

• B23H7/105

  Wire guides · CPC title

• B23H7/104

  Wire tension control · CPC title

• B23H11/006 Primary

  Electrical contacts or wires (B23H7/10 takes precedence) · CPC title

• B23H7/107 Primary

  Current pickups · CPC title