Electromagnetic stamping apparatus

Patent metadata

Field	Value
Publication number	US-11413676-B2
Application number	US-202016746516-A
Country	US
Kind code	B2
Filing date	Jan 17, 2020
Priority date	Nov 20, 2019
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

An electromagnetic stamping apparatus includes a work platform configured to load a work piece. A stamping component is coupled to the work platform and has a first position and a second position. The stamping component includes a stamping rod and a stamping head. The stamping head stamps the work piece on the first position. An electromagnetic device is coupled to the stamping rod and generates a magnetic force according to an alternating current to push the stamping component to the first position to make the stamping component stamp the work piece. A compression spring pushes the stamping component to the second position according to the restoring force of the compression spring. Wherein, the magnetic force is greater than the restoring force of the compression spring to make the stamping component stamp the work piece twice in every waveform period of the alternating current.

First claim

What is claimed is:

1. An electromagnetic stamping apparatus, comprising:
a work platform configured to load a work piece;
a stamping component configured relative to the work platform, the stamping component being configured to move to a first position and a second position, and comprising a stamping rod, a stamping head and a block, the stamping head being configured at one end of the stamping rod and configured for stamping the work piece at the first position, and the block being fixed on the stamping rod;
an electromagnetic device coupled to the stamping rod of the stamping component, the electromagnetic device generating a magnetic force according to an alternating current to push the stamping component to the first position to make the stamping component stamp the work piece;
a compression spring coupled to the stamping component, the compression spring pushing the stamping component to the second position by the restoring force of the compression spring; and
a rotating component comprising a motor and a timing belt, the timing belt being connected to the block and the motor, the motor being configured to drive the block to rotate through the timing belt to drive the stamping component to rotate at a rotational speed;
wherein, the magnetic force is greater than the restoring force of the compression spring to make the stamping component stamp the work piece twice in every waveform period of the alternating current.

2. The electromagnetic stamping apparatus of claim 1 , wherein every waveform period of the alternating current comprises a first peak value area, a second peak value area, and a base value area between the first peak value area and the second peak value area, the electromagnetic device respectively generates a first magnetic force and a second magnetic force according to the first peak value area and the second peak value area to push the stamping component to the first position, the stamping component is pushed to the second position by the compression spring in the base value area.

3. The apparatus of claim 2 , wherein the waveform of the alternating current is a sine wave.

4. The apparatus of claim 1 , wherein the electromagnetic device further comprises an electromagnetic component and an electromagnetic coil, the electromagnetic component is coupled to the stamping rod of the stamping component and magnetically coupled to the electromagnetic coil, the electromagnetic coil generates the magnetic force according to the alternating current applied to the electromagnetic coil to attract the electromagnetic component to make the electromagnetic component push the stamping component to the first position.

5. The apparatus of claim 1 , further comprising a limit block coupled to the stamping component, the compression spring being configured between the limit block and the block, and two ends of the compression spring respectively contacting the limit block and the block, the compression spring pushing the block according to the restoring force to push the stamping component to the second position.

6. The apparatus of claim 1 , further comprising a limit component, and the limit component comprising a limit groove, the limit groove being coupled to the stamping component and configured to limit the motion direction of the stamping component, the stamping rod contacting the limit groove by the tensile force of the timing belt.

7. The apparatus of claim 1 , further comprising a sensor and a controller, the sensor being coupled to the stamping component and the controller being connected to the sensor and the motor, the sensor being configured for sensing the motion state of the stamping component and generating a sensing value, the controller controlling the motor to rotate at the rotational speed according to the sensing value.

8. The apparatus of claim 7 , further comprising a grinding mechanism movably contacted the stamping component, the grinding mechanism comprising a grinding wheel and the controller being connected to the grinding mechanism, the controller controlling the grinding mechanism to make the grinding wheel of the grinding mechanism contact and grind the stamping head of the stamping component when the stamping component rotates at the rotational speed.

9. The apparatus of claim 1 , wherein the stamping head comprises a stamping portion and a flat portion on the outer edge of the stamping portion, the stamping portion stamps the work piece and the flat portion contacts the surface of the work piece when the stamping head stamps the work piece.

Assignees

• Univ Nat Taiwan Normal

Inventors

• Chen Shun-Tong
• Chiang Chao-Rong
• Huang Chien-Ta

Classifications

• B21D22/02

  Stamping using rigid devices or tools · CPC title

• B24B41/02 Primary

  Frames; Beds; Carriages · CPC title

• B21D26/14 Primary

  applying magnetic forces · CPC title

• B30B1/42

  by magnetic means, e.g. electromagnetic · CPC title

• B21D22/04

  for dimpling (combined with perforating B21D28/24) · CPC title