| JP2673118 | STRIPPER |
| JP2006150513 | PAPER POST-PROCESSING DEVICE |
| JP56163818 | SHEARING AND FORMING DEVICE FOR LONG MATERIAL |
CHOI, Sung-Il (104-603 Gyeongdong Apt, Cheongnyong-dong Geumjeong-gu, Busan-city 609-769, KR)
CLAIMS
1. A punching apparatus of a press for slope hole, the apparatus comprising: a punch moving in a vertical direction; a punching mold installed on a lower portion of the punch to correspond with the punch to support a molded material having a sloped surface that is to be perforated; and a rotating unit rotating the molded material so that the slope of the molded material can be placed on the punching mold in parallel, flush with the punching mold, wherein when the slope surface of the molded material is placed on the punching mold in parallel, flush with the punching mold by the rotating unit, the punch moves downward in the vertical direction to perforate the slope surface of the molded material.
2. The apparatus of claim 1 , wherein the rotating unit comprises: a frame; a holder, on which the molded material is placed, having an end portion that is rotatably coupled to the frame; and a rotating body coupled to the frame to rotate the holder.
3. The apparatus of claim 2, wherein the rotating body is a rotating cylinder coupled to the frame, and including a first piston rod de-compressing/compressing in a direction and having an end portion rotatably coupled to the holder.
4. The apparatus of claim 2, wherein the frame further includes a supporter supporting the other end portion of the holder when the holder is rotated onto the supporter such that the slope surface of the molded material is placed on the punching mold in parallel, flush with the punching mold.
5. The apparatus of claim 4, wherein the supporter includes a switch that stops the rotation of the holder when the holder contacts the supporter.
6. The apparatus of claim 2, further comprising: an ejection unit rotating the molded material, after the perforation of the slope surface of the molded material is completed, around a contact portion between the molded material and the supporter so that the molded material can be ejected from the holder.
7. The apparatus of claim 6, wherein the ejection unit is an ejection cylinder coupled to the frame and having a second piston rod de-compressing/compressing in a direction for ejecting the molded material from the holder.
8. The apparatus of claim 7, wherein an end portion of the second piston rod faces the molded material.
9. The apparatus of claim 1 , wherein the rotating unit comprises: a frame; an ejection cylinder coupled to the frame and having a second piston rod; a holder, on which the molded material is placed, having an end portion that is rotatably coupled to the second piston rod; and a rotating body coupled to the frame to rotate the holder.
10. The apparatus of claim 9, wherein the frame includes a supporter supporting the other end portion of the holder when the holder is rotated onto the supporter and the slope surface of the molded material is placed on the punching mold in parallel, flush with the punching mold, and when the second piston rod is compressed, the holder rotates around a contact portion between the holder and the supporter so that the molded material can be ejected from the holder. |
A PUNCHING APPARATUS OF PRESS FOR SLOPE HOLE
TECHNICAL FIELD The present invention relates to a punching apparatus for a slope hole, and more particularly, a punching apparatus, which can rotate a sloped surface of a molded material so that the sloped surface is in a horizontal direction and thus the sloped surface of the molded material can be perforated by a vertical movement of a mold of the punching apparatus.
BACKGROUND ART
In a conventional press, a press molding operation is performed by a mold that moves in a vertical direction and which is included in the conventional press. That is, when a steel plate, which is an object that is to be molded, having a predetermined size enters the conventional press including a plurality of molds, the steel plate is molded to a certain shape by sequential operations of the molds. Here, the molds each consist of a pair of upper and lower dies, and the upper die mainly moves in an up and down direction to mold the steel plate.
In the conventional press, if the molded material has a sloped surface, a punch cannot be formed in the sloped surface. Therefore, in order to perforate the molded material having the sloped surface, the molded material, which underwent the press molding operation, is drawn from the pressing line, and then, an operator must manually perforate the molded material. At this time, the operator must perforate the material after leveling the sloped surface of the molded material with a horizontal surface in a separate perforating apparatus. The molded material having the sloped surface makes the automation of the press punch process difficult.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a pressing line; FIG. 2 is a side view of a punching apparatus for perforating a hole in a sloped surface of a molded material, according to an embodiment of the present invention;
FIG. 3 is a view showing a sloped surface of the molded material so that the slope surface maintains a horizontal position in the press punch apparatus of FIG. 2; i
FIG. 4 is a view showing an ejection operation of the molded material that is perforated by the press punch apparatus of FIG. 2;
FIG. 5 is a side view of a press punch apparatus for perforating a hole in a sloped surface, according to another embodiment of the present invention; FIG. 6 is a view showing a sloped surface of a molded material so that the slope surface maintains a horizontal position in the press punch apparatus of FIG. 5; and
FIG. 7 is a view showing an ejection operation of the molded material that is perforated by the press punch apparatus of FIG. 5.
DETAILED DESCRIPTION OF THE INVENTION
TECHNICAL PROBLEM
The present invention provides a punching apparatus of a press for perforating a hole in a sloped surface of a molded material.
TECHNICAL SOLUTION
According to an aspect of the present invention, there is provided a punching apparatus of a press for a slope hole including: a punch moving in a vertical direction; a punching mold installed on a lower portion of the punch to correspond to the punch to support a slope of a molded material that will be perforated; and a rotating unit rotating the molded material so that the slope of the molded material can be placed on the punching mold in parallel with the punching mold, wherein when the slope of the molded material is placed on the punching mold in parallel with the punching mold by the rotating unit, the punch moves in the vertical direction to perforate the slope of the molded material.
ADVANTAGEOUS EFFECTS
According to the punching apparatus of the present invention, a molded material having a sloped surface can be perforated, and thus, entire pressing processes can be automated and an operating efficiency can be improved, and costs for fabricating the molded material can be reduced.
BEST MODE Hereinafter, structures and operations of a punching apparatus 100 for
perforating a sloped surface 51 of a molded material 50, according to embodiments of the present invention, will be described in detail with reference to accompanying drawings.
The punching apparatus 100, according to the current embodiment, is installed on a last stage of the pressing line 200, and is used when the sloped surface 51 of a material that is to be molded to a certain shape, needs to be perforated. Here, the material that is to be molded to a certain shape moves between a plurality of molds included in the press punch apparatus 100, and is pressed in a plurality of pressing operations in the pressing line 200. Sometimes, the sloped surface 51 of the molded material 50 that has been molded to a certain shape in the pressing operations must be perforated.
However, in the conventional pressing line, once the molded material 50 has been molded by the molds moving in a vertical direction, the molded material 50 is perforated, and thus, the perforation in a direction perpendicular to the sloped surface 51 of the molded material 50 cannot be performed. However, according to the present invention, a rotating unit, such as a rotating cylinder, rotates the molded material 50 so that the sloped surface 51 of the molded material 50 is horizontal, and then, the sloped surface 51 of the molded material 50 can be perforated in the perpendicular direction. . The press punch apparatus 100 of the current embodiment includes a punch 1 that moves upward/downward in a vertical direction, the punching mold 2 that is installed on a lower portion of the punch 1 to correspond with the punch 1 and supporting the molded material 50 having the slope surface 51 and which is to be punched, and the rotating unit that rotates the molded material 50 so that the slope surface 51 of the molded material 50 can be placed on the punching mold 2 in parallel, flush with the punching mold 2. When the slope surface 51 is placed on the punching mold 2 in parallel, flush with the punching mold 2 by the rotating unit, the punch 1 moves in the vertical direction to perforate the slope surface 51 of the molded material 50. The rotating unit includes a frame, a holder, a rotating body, a supporter, and an ejection unit.
The frame 8 supports the punching mold 2 with respect to the ground. The punching mold 2 is fixed by the frame 8, and the molded material 50 is rotated to place
to the punching mold 2.
The molded material 50 is placed on the holder 3 that has an end that is rotatably coupled to the frame 8 using a hinge. Accordingly, the holder 3 can rotate by a predetermined angle about the end, and thus, the molded material 50, placed on the holder 3, can be rotated with the holder 3.
The rotating body 4 rotates the holder 3, and the rotating body 4 is coupled to the frame 8. The rotating body 4 can be a rotating cylinder having a first piston rod 4a that can be compressed and de-compressed in a direction, and an end of the first piston rod 4a is rotatably coupled to the holder 3. If the first piston rod 4a is compressed in a status where a cylinder body of the rotating body 4 is coupled to the frame 8, the holder 3 rotates in a clockwise direction around the end of the holder 3 (refer to FIG. 3). When the first piston rod 4a is compressed and the slope surface 51 of the molded material 50 on the holder 3 is placed on the punching mold 2 in parallel, flush with the punching mold 2, the operation of the first piston rod 4a is stopped so that the punching process can be performed. After completing the punching process, the first piston rod 4a is decompressed to return to the original status of the first piston rod 4a when the molded material 50 is ejected from the holder 3.
The supporter 5 supports the other end of the holder 3 when the holder 3 rotates in the clockwise direction and the slope surface 51 of the molded material 50 is placed on parallel, flush with the punching mold 2, and the supporter 5 is formed on the frame 8. That is, after the rotating body 4 rotates the holder 3 in the clockwise direction, the supporter 5 is used to stop the rotation of the holder 3 and to support the holder 3. The supporter 5 includes a buffering member 5a and a switch 5b on a portion contacting the holder 3. The buffering member 5a is used to stop the rotation of the holder 3 to lessen shock onto the holder 3, and is formed by attaching a rubber material on the contact portion between the supporter 5 and the holder 3.
The switch 5b stops the operation of the rotating body 4 when the switch 5b contacts the holder 3. Although the holder 3 can be simply stopped by contacting the supporter 5, the switch 5b blocks the power supplied to the rotating body 4 when the switch 5b contacts the holder 3. In the present embodiment, the switch 5b is installed with the buffering member 5a, however, the present invention is not limited thereto, and thus, the switch 5b can also be only formed on the supporter 5 without buffering member 5a.
The ejection unit rotates the molded material 50, after the punching operation is completed, about the contact portion between the molded material 50 and the supporter
5. In more detail, the ejection unit rotates the holder 3 in the clockwise direction about the other end of the holder 3, so that the molded material 50 placed on the holder 3 can be ejected from the holder 3.
The ejection unit is an ejection cylinder 6 having a second piston rod 6a that is de-compressed and compressed in a direction for separating the molded material 50 from the holder 3. An end of the second piston rod 6a is located to face the molded material 50 that is placed on the holder 3. When the second piston rod 6a is de-compressed, the second piston rod 6a contacts the molded material 50 to rotate the molded material 50 in the clockwise direction. In more detail, the molded material 50 is rotated about the other end of the holder 3.
On the other hand, reference numeral 3a denotes a buffering apparatus. The buffering apparatus 3a is installed on the holder 3 so as to support an inner surface of the molded material 50. Upper portion of the buffering apparatus 3a, which contacts the molded material 50, is formed of an elastic material such as a rubber, and thus, the shock applied to the molded material 50 that is placed on the holder 3 can be reduced.
The press punch apparatus 100 having the above structure operates as follows.
When the molded material 50 reaches the last stage of the pressing line 200, the molded material 50 is located on an upper surface of the holder 3 as shown in FIG. 2.
At this time, the molded material 50 can be placed on the holder 3 and the shock applied to the molded material 50, as the molded material 50 is placed on the holder 3, can be reduced by the buffering apparatus 3a.
At this point, when the first piston rod 4a of the rotating body 4 is compressed, the holder 3 rotates about an end that is coupled to the frame 8 using the hinge, and the rotation of the holder 3 is stopped by the supporter 5. Thus, when the holder 3 contacts the buffering member 5a of the supporter 5, the shock caused by the rotation can be reduced. In addition, when the holder 3 contacts the switch 5b, the holder 3 transmits a signal for stopping the rotation operation of the rotating cylinder 4, and thus, the power supplied to the rotating body 4 is blocked and the rotating body 4 does not operate.
When the rotation is completed, the slope surface 51 of the molded material 50, which is to be perforated, is horizontally placed as shown in FIG. 3. That is, the slope
surface 51 of the molded material 50 is placed on the punching mold 2 in parallel, flush with the punching mold 2. At this time, the punch 1 moves downward to perforate the slope surface 51 of the molded material 50. After completing the perforation, the punch 1 moves back upward. When the perforation of the slope surface 51 of the molded material 50 is completed, the molded material 50 is ejected from the press punch apparatus 100, as shown in FIG. 4. The ejection of the molded material 50 is performed by the de-compression of the second piston rod 6a of the ejection cylinder 6. When an end of the second piston rod 6a is de-compressed to push the molded material 50, the molded material 50 is rotated in the clockwise direction around the other end of the holder 3. Then, the molded material 50 is ejected from the supporter 5 and moved to a conveyer 7 adjacent to the press punch apparatus 100, and then, the molded material 50 is moved to a final destination along the conveyer 7.
The press punch apparatus 100 according to the present invention can perforate the slope surface 51 of the molded material 50 using the mold moving in the vertical direction. That is, the mold moving in the vertical direction generally cannot perforate the slope 51 in the direction perpendicular to the slope 51 , this problem can be solved by rotating the molded material 50.
In addition, according to the punching apparatus 100 of the current embodiment, the rotating body 4 can easily rotate the molded material 50, and thus, installation costs can be reduced.
Also, according to the punching apparatus 100 of the current embodiment, the supporter 5 stably supports the holder 3, which is rotated, and accordingly, the molded material 50 that is placed on the holder 3 can be stably supported. In addition, the buffering member 5a is formed on the supporter 5 to reduce the shock on the molded material 50 placed on the holder 3 as the holder 3 is rotated onto supporter 5. If the buffering member 5a is not installed, the molded material 50 might be ejected from the holder 3 due to the shock caused by the contact with the supporter 5 as the holder 3 is rotated onto supporter 5. The switch 5b is formed on the supporter 5, and thus, the power is not supplied to the rotating cylinder 4 once the holder 3 contacts with the supporter 5 as the holder 3 is rotated onto the supporter 5.
In addition, according to the press punch apparatus 100 of the current
embodiment, the ejection cylinder 6 is formed, and thus, the molded material 50, once the perforation operation is completed, is moved to the conveyer 7 in a simple way by the ejection cylinder 6, instead of an operator manually moving the molded material 50, which is very inefficient in view of time and costs. The press punch apparatus 100 according to the present invention can be modified as follows within a range as long as the object of the invention is not changed.
First, according to the above embodiment, the holder 3 is fixed on the frame 8, however, the present invention is not limited thereto, and thus, the holder 3 can be rotatably coupled to an end of the second piston rod 6a of the ejection cylinder 6 (refer to FIGS. 5 through 7). According to this embodiment, when the rotating body 4 is compressed, the holder 3 rotates around the end of the second piston rod 6a and places the molded material 50 on the punching mold 2 so that the sloped surface 51 of the molded material 50 is parallel, flush with the punching mold 2.
On the other hand, when the second piston rod 6a is de-compressed in order to eject the molded material 50 off the holder 3, the holder 3 rotates around the contact portion between the holder 3 and the supporter 5. When the holder 3 is rotated by more than a predetermined angle (for example, an angle of 90° with respect to the ground), the molded material 50 is ejected from the holder 3 and moves onto the conveyer 7. In addition, in the press punch apparatus 100 according to the present invention, the rotating body 4 can include a driving motor and a driving transfer unit. For example, the holder 3 rotates around a predetermined rotary axis on the frame 8, and the rotary axis can be directly connected to a driving shaft of the driving motor or can be connected to the driving motor through the transfer unit such as a belt. Otherwise, the rotating body 4 can be unit that can rotate the holder 3.
In addition, the ejection unit can be unit that separates the molded material 50 from the holder 3. For example, a vacuum adsorption unit that is attached on an outer surface of the molded material 50 to rotate the molded material 50 about the contact portion between the holder 3 and the supporter 5can be used. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by one of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following
claims.