Electromagnetic stamping apparatus

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.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an electromagnetic stamping apparatus, especially to an electromagnetic stamping apparatus which can stamp the work pieces rapidly by electromagnetic driving to improve production efficiency.

2. Description of the Prior Art

Nowadays, the products are becoming miniaturized and automated, so that the requirements for precision of products and production efficiency are also increasing. Furthermore, the microstructure manufacturing process of products and parts also needs to reach the high precision level. Nowadays, the microstructures produced by stamping apparatus have been widely applied to various fields (such as optoelectronic fields, aerospace fields and biomedical fields).

In the optoelectronic industries, the microstructures can be applied to the light guide plates of OLEDs and the mobile phone screens to improve the uniformity and the image correction. In the aerospace industries, the microstructures can be applied to the surface of aircraft shells to prevent the aircrafts from being frozen in low temperature environments to cause accidents. In the biomedical industries, the microstructures can be used as miniature containers for biological cell culture. In addition, the microstructures can make the surface of the material has a resistibility to adhesion and corrosion, and can also be widely applied to ships, military equipments, power and communications.

In order to achieve high-precision and miniaturized microstructures, it is necessary to stamp the work piece point by point by a micro stamping device with a hardened tool. Since the microstructures are the high-density structures, it would take a long time to manufacture and need to modify the stamping path continuously to achieve high-precision microstructures. In addition, after stamping the work piece for a long time, the stamping tool may be sticky and then the stamping efficiency may decrease, thereby reducing the quality of products and increasing production costs.

Thus, it is necessary to develop a new stamping apparatus which can effectively improve the production efficiency and reduce the production costs to solve the problems of the prior art.

SUMMARY OF THE INVENTION

Therefore, the present invention provides an electromagnetic stamping apparatus can stamp work pieces rapidly and online grind the stamping component by electromagnetic driving to improve production efficiency.

According to an embodiment of the present invention, the electromagnetic stamping apparatus includes a work platform, a stamping component, an electromagnetic device and a compression spring. The work platform is configured to load a work piece. The stamping component is configured relative 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 is disposed at one end of the stamping rod and configured for stamping the work piece at the first position. The electromagnetic device is coupled to the stamping rod of the stamping component. The electromagnetic device generates the 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. The compression spring is coupled to the stamping component. The compression spring pushes the stamping component to the second position by 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.

Wherein, every waveform period of the alternating current has 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.

Moreover, the waveform of the alternating current is a sine wave.

Wherein, the electromagnetic device further includes 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.

Wherein, the electromagnetic stamping apparatus further includes a limit block coupled to the stamping component, and the stamping component further includes a block coupled to the stamping rod. The compression spring is disposed between the limit block and the block, and two ends of the compression spring respectively contact the limit block and block. The compression spring pushes the block according to the restoring force of the compression spring to push the stamping component to the second position.

Wherein, the electromagnetic stamping apparatus further includes a rotating component. The rotating component includes a motor and a timing belt. The timing belt is coupled to the stamping rod and the motor, and the motor drives the stamping component to rotate at a rotational speed.

Moreover, the electromagnetic stamping apparatus further includes a limit component, and the limit component includes a limit groove. The limit groove is coupled to the stamping component and configured to limit the motion direction of the stamping component. The stamping rod contacts the limit groove by the tensile force of the timing belt.

Wherein, the electromagnetic stamping apparatus further includes a sensor and a controller. The sensor is coupled to the stamping component and the controller is connected to the sensor and the motor. The sensor is configured for sensing the motion state of the stamping component and generate a sensing value, and the controller controls the motor to rotate at the rotational speed according to the sensing value.

Furthermore, the electromagnetic stamping apparatus includes a grinding mechanism movably contacted the stamping component. The grinding mechanism includes a grinding wheel and the controller is connected to the grinding mechanism. The controller controls 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.

Wherein, the stamping head includes 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.

In summary, the electromagnetic stamping apparatus of the present invention can control the stamping component to stamp the work piece twice in every waveform period of the alternating current by the electromagnetic device and the compression spring, and control the stamping direction of the stamping component by the rotating component and the limit component. Moreover, the electromagnetic stamping apparatus also can online grind the stamping head to improve the production efficiency and reduce the production costs.

DETAILED DESCRIPTION OF THE INVENTION

For the sake of the advantages, spirits and features of the present invention can be understood more easily and clearly, the detailed descriptions and discussions will be made later by way of the embodiments and with reference of the diagrams. It is worth noting that these embodiments are merely representative embodiments of the present invention, wherein the specific methods, devices, conditions, materials and the like are not limited to the embodiments of the present invention or corresponding embodiments. Moreover, the devices in the figures are only used to express their corresponding positions and are not drawing according to their actual proportion.

Please refer toFIG. 1.FIG. 1is a schematic diagram illustrating an electromagnetic stamping apparatus1in an embodiment of the present invention. In this embodiment, the electromagnetic stamping apparatus1includes a work platform11, a stamping component12and an electromagnetic device13. The work platform11is configured to load a work piece2. The stamping component12is configured relative to the work platform12. The stamping component12includes a stamping rod121and a stamping head122. The stamping head122is configured at one end of the stamping rod121and configured to stamp the work piece2. The electromagnetic device13generates the magnetic force according to the alternating current to push the stamping component12to make the stamping component12stamp the work piece2.

In practice, the work piece2can be configured on the surface of one side of the work platform12. The stamping component12is configured above the work platform12and at the same side of the work piece2. The stamping head122located at one end of the stamping rod121faces to the work piece2. The electromagnetic device13is configured at the other one end of stamping rod121opposite to the stamping head122. Therefore, the order of the components of the electromagnetic stamping apparatus1is the work platform12, the work piece2, the stamping head122, the stamping rod121and the electromagnetic device13. The electromagnetic device13generates the magnetic force to push the stamping rod121and drive the stamping head122to make the stamping component12stamp the work piece2when the electromagnetic device13receives an alternating current.

Please refer toFIG. 1andFIG. 2.FIG. 2is a schematic diagram illustrating the stamping component12of the electromagnetic stamping apparatus1ofFIG. 1at the first position. In this embodiment, the stamping component12of the electromagnetic stamping apparatus1has a first position and a second position, and the stamping component12stamps the work piece2at the first position. In practice, the first position is the position which the stamping head122of the stamping component12contacts and stamps the work piece2, and the second position is the position which the stamping head122of the stamping component12separates from the surface of the work piece2and has a distance with the work piece2. When the electromagnetic device13generates the magnetic force after receiving the alternating current, the electromagnetic device13pushes the stamping component to the first position by the magnetic force to make the stamping component stamp the work piece2.

As shown inFIG. 1, the electromagnetic device13further includes an electromagnetic component131and an electromagnetic coil132. The electromagnetic component131is coupled to the stamping rod121of the stamping component12and magnetically coupled to the electromagnetic coil132. The electromagnetic coil132generates the magnetic force according to the alternating current applied on the electromagnetic coil132to attract the electromagnetic component131, so that the electromagnetic component131pushes the stamping component12to the first position. In practice, the material of the electromagnetic component131can be magnetic material (such as iron, steel, nickel), and the material of the electromagnetic coil132can be copper. The stamping rod121of the stamping component12can contact the electromagnetic component131. Moreover, the stamping rod121can pass through the electromagnetic coil132to contact the electromagnetic component131. The electromagnetic coil132can be fixed on the substrate (not shown in the figures) of the electromagnetic stamping apparatus1, and the electromagnetic component131is configured at the other side of the electromagnetic coil132opposite to the stamping head122and can move relative to the electromagnetic coil132. The electromagnetic coil132generates the magnetic force when the alternating current is applied on the electromagnetic coil132. At this time, the electromagnetic component131is attracted by the magnetic force generated by the electromagnetic coil132and moves toward the electromagnetic coil132. Since the stamping rod121of the stamping component12contacts the electromagnetic component131, the electromagnetic component131also pushes the stamping rod121and drives the stamping component12to the first position at the same time when the electromagnetic component131is attracted by the magnetic force and moves toward the electromagnetic coil132. It should be noted that the materials of the electromagnetic component131and the electromagnetic coil132are not limited thereto.

In one embodiment, the electromagnetic component131can include an electromagnetic fixed component (not shown in figure) fixed on the substrate, and the electromagnetic coil132winds around the outer surface of the electromagnetic fixed component. When the alternating current is applied on the electromagnetic coil132, the electromagnetic fixed component generates the magnetic force due to the induction by the electromagnetic coil132and attracts the electromagnetic component131by the magnetic force to make the stamping component12stamp the work piece2. In this embodiment, the motions and functions of the electromagnetic component131and the electromagnetic coil132are the same with those of the electromagnetic component131and the electromagnetic coil132in the aforementioned embodiment, and it will not described thereto.

As shown inFIG. 2, the electromagnetic stamping apparatus1further includes a compression spring14and a limit block15, and the stamping component12further includes a block123. The compression spring14and the limit block15are coupled to the stamping component12, and the block123is coupled to the stamping rod121. The compression spring14is configured between the limit block15and the block123, and two ends of the compression spring14respectively contact the limit block15and the block123. The compression spring14pushes the block123by the restoring force of the compression14to move the stamping component12to the second position. In practice, the compression spring14can be configured around the stamping rod121of the stamping component12, and the inner diameter of the compression spring14is greater than the diameter of the stamping rod121. The limit block15can be set around the stamping rod121of the stamping component12. The block123can be fixed on the stamping rod121and move with the stamping component12. In this embodiment, the compression spring14is disposed at the other side of the limit block15opposite to the stamping head122, and one end of the compression spring14contacts the limit block15. The block123is disposed on the other side of the compression spring14opposite to the limit block15, and the other one end of the compression spring14contacts the block123. Therefore, the compression spring14can contact the limit block15and push the block123by the restoring force of the compression spring14, so as to drive the stamping component12to move to the second position.

Please refer toFIG. 1,FIG. 2andFIG. 3.FIG. 3is a schematic diagram illustrating the alternating current in the embodiment ofFIG. 1. As shown inFIG. 3, the aforementioned alternating current includes a plurality of waveforms. Every waveform period includes a first peak value area A1, a second peak value area A2and a base value area A3between the first peak value area A1and the second peak value area A2. The electromagnetic device13respectively generates a first magnetic force and a second magnetic force according to the first peak value area A1and the second peak value area A2to push the stamping component12to the first position, and the stamping component12is pushed to the second position by the compression spring14during the base value area A3. In practice, the waveform of the alternating current can be a sine wave, but it is not limited thereto. The horizontal axis t is time and the vertical axis I is current value inFIG. 3. The absolute values of the values in the first peak value area A1and the second value area A2are greater than those in the base value area A3. During the waveform of the alternating current located at the first peak value area A1and the second peak value area A2, the first magnetic force and the second magnetic force generated by the electromagnetic device13are greater than the restoring force of the compression spring14. Therefore, the electromagnetic component131of the electromagnetic device13is respectively attracted by the first magnetic force and the second magnetic force to move toward the electromagnetic coil132and pushes the stamping component12to the first position to make the stamping component12stamp the work piece2. During the waveform of the alternating current located at the base value area A3, the magnetic force generated by the electromagnetic device13is smaller than the restoring force of the compression spring14. Therefore, one end of the compression spring14contacts the limit block15and the other end of the compression spring14pushes the block123away from the work piece2to the second position.

Since the sequence in each waveform period of the alternating current is arranged as the base value area A3, the first peak value area A1, the base value area A3, the second peak value area A2, and then the base value area A3, the magnetic force generated by the electromagnetic device13will be greater than the restoring force of the compression spring14twice in each waveform period of the alternating current. Furthermore, the stamping rod121is pushed to the first position twice by the electromagnetic component131in every waveform period of the alternating current. In other words, the stamping component12stamps the work piece2twice in every waveform period of the alternating current to improve the production efficiency.

Please refer toFIG. 2andFIG. 4.FIG. 4is an exploded diagram illustrating the electromagnetic stamping apparatus1ofFIG. 2in another perspective. In this embodiment, the electromagnetic stamping apparatus1further includes a rotating component16and a limit component17. The rotating component16includes a motor161and a timing belt162. The timing belt162is coupled to the stamping rod121and the motor161, and the motor161drives the stamping component12to rotate at a rotating speed. The limit component17includes a limit groove171. The limit groove171is coupled to the stamping component12and configured to limit the motion direction of the stamping component12. In practice, the motor161can be configured on the substrate, and the rotating component16can include a rotating member163connected to the motor161. The timing belt162can be connected to the rotating member163and the block123of the stamping component12. Therefore, when the motor161operates at the rotating speed, it drives the rotating member163to rotate and the rotating member163drives the block123to rotate through the timing belt162, so as to drive the stamping component12to rotate. In one embodiment, the rotating member163and the block123are the timing wheel. The limit component17can be configured on the substrate and contact one side of the stamping rod121of the stamping component12. Moreover, the rotating member163of the rotating component16can control the block123to move toward the limit component17by the tensile force of the timing belt162, so as to make the stamping component12contact the limit groove171of the limit component17. Therefore, the limit component17can ensure that the stamping component12stamps the work piece2at the same position, thereby improving the precision of the products.

Please refer toFIG. 5.FIG. 5is a schematic diagram illustrating the electromagnetic stamping apparatus1in one embodiment of the present invention. In this embodiment, the electromagnetic stamping apparatus1further includes a sensor18, a controller19and a grinding mechanism10. The sensor18is coupled to the stamping component12. The controller19is connected to the sensor18, the motor16and the grinding mechanism10. The grinding mechanism10movably contacts the stamping component12and includes a grinding wheel101. The sensor18is configured for sensing the motion state of the stamping component12and generates a sensing value. The controller19controls the motor161and the grinding mechanism10according to the sensing value to control the grinding wheel101to contact and grind the stamping head122of the stamping component12. In practice, the sensor18can be an impedance sensor and configured on the stamping rod121of the stamping component12. The controller19can be a computer. The sensor18can sense the impedance value between the stamping head122and the work piece2while the stamping component12contacts the work piece2. When the stamping head122is stuck since it stamps the work piece2for a long time, the impedance value sensed by the sensor is increased. When the controller19detects that the impedance value is greater than the impedance threshold value, it turns on the motor161to make the stamping component12rotate and controls the grinding mechanism10to move to control the grinding wheel101to contact and grind the stamping head122of the stamping component12. Therefore, the stamping head122can be online grinded without removing it from the stamping component12to reduce costs.

Please refer toFIG. 6.FIG. 6is a schematic diagram illustrating the stamping head122in an embodiment of the present invention. As shown inFIG. 6, the stamping head122has a stamping portion1221and a flat portion1222on the outer edge of the stamping portion1221. When the stamping head122stamps the work piece2, the stamping portion1221stamps the work piece2and the flat portion1222contacts the surface of the work piece2. In practice, the stamping portion1221can protrude from the flat portion1222, and the area of the flat portion1222is greater than that of the stamping portion1221. When the stamping component12stamps the work piece2, in addition to the stamping portion1221stamps on the work piece2, the flat portion1222contacts the surface of the work piece2at the same time. Therefore, the flat portion1222can remove burrs or flashes on the work piece2at the outer edge of the stamping portion1221, thereby improving the quality of products. It should be noted that the shape of the stamping portion1221of the stamping head122is not limited to the arc shape inFIG. 6, but can be designed according to requirements.

In another embodiment, the stamping portion also can be dent in the flat portion. In this embodiment, the work piece includes a bulging structure extended from the surface of the work piece. The stamping portion of the stamping head stamps the bulging structure of the work piece, and the flat portion of the stamping head contacts the surface of the work piece. In practice, when the stamping head stamps the work piece, the stamping portion dented in the flat portion stamps the bulging structure of the work piece, and the excessive work piece material is squeezed onto the surface of the work piece. The flat portion disperses and flattens the excessive work piece material by contacting the surface of the work piece to remove the burrs or flashes located on the work piece at the outer edge of the stamping portion, thereby improving the quality of products.

In summary, the electromagnetic stamping apparatus of the present invention can make the stamping component stamp the work piece twice in every waveform period of the alternating current by the electromagnetic device and the compression spring, and control the stamping direction of the stamping component by the rotating component and the limit component. Moreover, the electromagnetic stamping apparatus also can online grind the stamping head to improve the production efficiency and reduce the production costs.

With the examples and explanations mentioned above, the features and spirits of the invention are hopefully well described. More importantly, the present invention is not limited to the embodiment described herein. Those skilled in the art will readily observe that numerous modifications and alterations of the device may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.