Punching mold device capable of rotating a workpiece and punching method using thereof

Patent metadata

Field	Value
Publication number	US-11084081-B2
Application number	US-201816163056-A
Country	US
Kind code	B2
Filing date	Oct 17, 2018
Priority date	Jun 12, 2018
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A punching mold device capable of rotating a workpiece includes an upper mold base, a lower mold base opposite to the lower mold base, an indexing rotation plate, a servo motor and a position-fixing element. The lower mold base includes a clamping portion for fixedly clamping a workpiece. The indexing rotation plate is formed with holes which collectively form a circular contour. The servo motor is connected to the indexing rotation plate and the workpiece, and synchronously rotates the indexing rotation plate and the workpiece. The position-fixing element includes a positioning pin which aims towards and is pluggably connected to one of the holes for stopping the rotation of the indexing rotation plate and the workpiece. The upper mold base includes a punching head module aligned with the clamping portion for punching the workpiece.

First claim

What is claimed is:

1. A punching mold device capable of rotating a workpiece, the punching mold device comprising:
a lower mold base comprising a clamping portion for fixedly clamping the workpiece;
an indexing rotation plate which is coaxial to the workpiece and formed with a plurality of holes which collectively form a circular contour;
a servo motor connected to the indexing rotation plate and the workpiece for synchronously rotating the indexing rotation plate and the workpiece;
a position-fixing element comprising a positioning pin pluggably connected to one of the holes for stopping a rotation of the indexing rotation plate and the workpiece; and
an upper mold base disposed opposite to the lower mold base, the upper mold base comprising a punching head module aligned with the clamping portion for punching the workpiece; and
a solenoid valve connected to the positioning pin for repeatedly moving the positioning pin,
a central control unit electrically connected to the servo motor and the solenoid valve,
wherein the solenoid valve is configured to move the positioning pin to pluggably insert into the one of the holes.

2. The punching mold device of claim 1 , wherein the clamping portion comprises:
a mandrel which is movable to press against the workpiece; and
a protrusion body disposed between the mandrel and the indexing rotation plate such that the workpiece is sandwiched and positioned between the mandrel and the protrusion body.

3. The punching mold device of claim 2 , further comprising:
a positioning cylinder comprising a cylinder body and a telescoping arm telescopically connected the cylinder body; and
a rotating portion rotatably connected to one end of the telescoping arm opposite to the cylinder body, and jointed to the mandrel,
wherein, when the cylinder body pushes the telescoping arm forwardly, the mandrel directly contacts and presses against the workpiece so that the mandrel is able to be rotated synchronously with the workpiece.

4. The punching mold device of claim 2 , wherein the clamping portion comprises:
a discharge zone passage disposed inside the protrusion body; and
a residue entrance formed on a surface of the protrusion body, and located below the punching head module,
wherein, when the workpiece is punched by the punching head module, waste material generated from the workpiece fall into the discharge zone passage through the residue entrance.

5. The punching mold device of claim 4 , further comprising:
a vacuum pump for sucking the waste material out of the discharge zone passage; and
an air passage connected to the discharge zone passage and the vacuum pump.

6. The punching mold device of claim 5 , wherein the discharge zone passage comprises an inclined portion for guiding the waste material towards the air passage from the discharge zone passage.

7. The punching mold device of claim 1 , wherein the indexing rotation plate is formed with a non-circular through hole thereon; and
the servo motor comprises a motor machine, a transmission shaft and a workpiece chuck, one end of the transmission shaft is connected to the motor machine, the other end of the transmission shaft is connected to the workpiece chuck, and the transmission shaft passes through the non-circular through hole of the indexing rotation plate so as to collectively rotate with the indexing rotation plate, and the workpiece chuck passes through the clamping portion to directly prop the workpiece so that the chuck is able to rotate with the workpiece collectively.

8. A punching method applied on the punching mold device of claim 1 , the punching method comprising:
(a) placing the workpiece onto the clamping portion;
(b) synchronously rotating the workpiece and the indexing rotation plate by using the servo motor;
(c) using the solenoid valve to move the positioning pin to insert into the one of the holes which is aligned with the positioning pin to stop a rotation of the indexing rotation plate and the workpiece;
(d) punching the workpiece to form at least one set of punched holes by using the punching head module;
(e) using the solenoid valve to remove the positioning pin away from the one of the holes, such that the indexing rotation plate and the workpiece are allowed to be rotated again; and
(f) returning to step (c) when the positioning pin is aligned with another of the holes again.

9. The punching method of claim 8 , wherein the clamping portion comprises a mandrel and a protrusion body arranged opposite to the mandrel, the mandrel is located at one surface of the workpiece opposite to the protrusion body, and step (a) further comprises:
placing the workpiece on the protrusion body of the clamping portion; and
the punching method further comprising:
between step (a) and step (b), pushing the mandrel forwardly to press against the workpiece such that the workpiece is sandwiched between the protrusion body and the mandrel.

10. A punching mold device capable of rotating a workpiece, the punching mold device comprising:
a clamping portion for fixedly clamping the workpiece;
an indexing rotation plate which is coaxial to the workpiece and formed with a plurality of holes which collectively arrange in a circular contour;
a servo motor connected to the indexing rotation plate and the workpiece, for synchronously rotating the indexing rotation plate and the workpiece;
a position-fixing element comprising a positioning pin which is pluggably connected to one of the holes for stopping a rotation of the indexing rotation plate and the workpiece;
a solenoid valve connected to the positioning pin for reciprocating the positioning pin;
a central control unit electrically connected to the servo motor and the solenoid valve; and
a punching head module aligned with the clamping portion;
wherein the servo motor is configured to synchronously rotate the indexing rotation plate and the workpiece such that, (a) the solenoid valve is configured to insert the positioning pin into the one of the holes; (b) the punching head module is moved to punch the workpiece; (c) the solenoid valve is further configured to remove the positioning pin from the one of the holes so as to allow the indexing rotation plate and the workpiece to be rotatable again, (d) and steps (a), (b) and (c) are repeated until the workpiece is completed.

11. The punching mold device of claim 10 , wherein the clamping portion comprises:
a mandrel which is movable to press against the workpiece; and
a protrusion body arranged opposite to the mandrel, for placing the workpiece, wherein the protrusion body is disposed between the mandrel and the indexing rotation plate, so that the workpiece can be sandwiched to be positioned between the protrusion body and the mandrel.

12. The punching mold device of claim 11 , further comprising:
a positioning cylinder comprising a cylinder body and a telescoping arm telescopically connected the cylinder body; and
a rotating portion rotatably connected to one end of the telescoping arm opposite to the cylinder body, and the mandrel is rotatably jointed to the rotating portion,
wherein, before the punching head module punches the workpiece, the cylinder body is configured to push the telescoping arm forwardly, so as to move the mandrel to directly contact and press against the workpiece so that the workpiece can be sandwiched to be positioned between the protrusion body and the mandrel.

Assignees

• Quanta Comp Inc

Inventors

• Lin Shu-Chen

Classifications

• B21D22/08

  with die parts on rotating carriers · CPC title

• B21D43/02

  Advancing work in relation to the stroke of the die or tool · CPC title

• B21D43/003

  Positioning devices (B21D28/04 and B21D28/265 take precedence; stops B21D43/26; centering moving strips B21D43/023) · CPC title

• B21D28/28 Primary

  in tubes or other hollow bodies · CPC title

• B21D37/12

  Particular guiding equipment, {e.g. pliers}; Special arrangements for interconnection or cooperation of dies · CPC title