KR20020093652A - Side Face Piercing Apparatus for Drawing-Press-Product Such as Lamp-shade - Google Patents

Abstract

PURPOSE: A device for piercing a side for a drawing press product is provided to conveniently pierce a drawing press product by using a pneumatic or a hydraulic cylinder and to save the cost by reducing the size of a press die. CONSTITUTION: Fixed dies(30) are installed on both sides of a bed(10) to support the inner sides of a drawing press product. A punching hole(32) for piercing is formed on the outer face of the fixed die. An operating cylinder(50) is installed outside the fixed die to move forward and backward a piston toward the fixed die. A movable die(70) is fixed on the end portion of the piston of the operating cylinder. A punch holder(90) is fixed on the movable die. A piercing punch(100) corresponding to the punching hole of the fixed die is installed in the punch holder. A scrap bar(110) elastically installed on the front face of the punch holder pressurizes the side of the drawing press product toward the fixed die.

Description

Side Piercing Apparatus for Drawing-Press-Product Such as Lamp-shade}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side piercing device for a drawing press product. In particular, the side piercing operation of a drawing press-molded product having a rectangular or polygonal container shape such as an integrated ceiling lamp is excluded from a complicated device in the form of a general press mold, and thus, A side piercing device for a drawing press product is made possible as a device of a simple structure used.

In general, drawing press products are formed by forming a plate-shaped metal material into a container. Most of these drawing press products do not have side piercing because they are used for containers or similar purposes.

However, sometimes it is very difficult to manufacture a press mold suitable for piercing in order to puncture the side of the container. In short, a general press mold for blanking, piercing, drawing, etc. has a structure in which a metal plate is supplied to a fixed die, and a punch fixed to the movable die is vertically lowered and processed. In such a press die, it is not difficult to pierce the bottom of the container by forming a support having a height corresponding to the depth of the container on the fixed die and placing the container upside down. However, in order to pierce the side of the container, it is difficult to design an appropriate press die due to problems such as setting of the container, direction of piercing, deformation of the container during piercing, and even if it is designed, it is expensive and complicated to work.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows an example of a drawing press product that requires a piercing process on its side. The product shown in Figure 1 represents a 'ceiling lamp' developed by the applicant. The ceiling lampshade is separated from the installation plate and the front and rear protection plate, and then weld-bonded through the bending and piercing work, respectively, to form a single plate metal material into the overall shape of the ceiling lampshade, and then install the plate part ( 3) and the left and right protection plate portions 4 and 5 are provided with various installation holes 6 and 7 for wiring.

As a press mold apparatus for drilling the installation hole 7 in the left and right protection plate parts 4 and 5 which are the side surfaces of the ceiling lamp shade 2, Korean Patent Application No. 2000-4815 of the present applicant Manufacturing method and apparatus thereof and Patent Application No. 2001-2402 (a manufacturing method and apparatus for slim lampshade for ceiling lamp).

That is, when the ceiling lampshade is installed on the perforated member, and then presses the upper press downward, the press presses one side of the operation port to move the operation port to the side, and the punching pin connected to the operation port is operated to the side. To have a complex structure to perform the perforation.

This mold device is a breakthrough that can pierce the side of the ceiling lampshade drawn in a single plate. However, on the basis of a large and complex press mold apparatus, a linking means must be added to converting the movement of the vertically descending press back into the horizontal movement of the punching pin. As a result, the mold had a more complicated structure, and there was a difficult and costly closure.

The present invention has been made in view of the above-described conventional circumstances, and an object of the present invention is to provide a simple side structure piercing device using a hydraulic or pneumatic cylinder without a general press mold form to simplify the side of a drawing press product. Perforation is intended to improve productivity and reduce costs.

1 is a view showing a slim lampshade for a ceiling lamp as an example of a drawing press product

Figure 2 is a perspective view showing the overall structure of the side piercing device according to the present invention

3 is an enlarged view illustrating main parts of a device of one side of FIG. 2;

4 is a front view of main parts of the side piercing device according to the present invention;

5A is a cross-sectional view taken along the line I-I of FIG.

FIG. 5B is a detailed view of portion A of FIG. 4

FIG. 6 is a cross-sectional view taken along the line II-II of FIG. 5.

7 shows a pneumatic circuit of an operating cylinder of the present invention.

8A is a front sectional view of the main part of an initial state in which a ceiling lamp shade is set;

Fig. 8B is a front sectional view showing the main portion showing the state in which the scrap bar is advanced by the working cylinder and is in contact with the ceiling lampshade.

Fig. 8C is a front sectional view of the main portion showing the punched state;

Fig. 8D is a front sectional view of the main portion showing the state where the piercing punch is retracted after drilling.

<Explanation of symbols for the main parts of the drawings>

2: integrated ceiling lamp shade 10: bed

12: outlet 30: fixed die

32: punching hole 34: discharge port

50: working cylinder 52: piston

70: movable die 72: guide hole

90: punch holder 92: guide hole

94: receiving groove 100: piercing punch

110: scrap bar 112: through hole

114: female thread 130: support

132: guide bar 150: coupling shaft

152: shaft portion 154: male thread portion

156: head 160: compression spring

200: pipeline 202: switching valve

204: switch 206: pneumatic or hydraulic source

220: support 230: bolt

In order to achieve the above object, the side piercing device of the drawing press product according to the present invention is installed to support both sides of the inner surface of the drawing press product in close contact with both sides of the bed, and the punching hole for piercing is formed on the outer side. die; An operating cylinder installed outside the fixed die to advance and retract the piston toward the fixed die; A movable die fixed to the piston end of the working cylinder; A punch holder fixed to the movable die and having a piercing punch corresponding to a punching hole of the fixed die at a front surface thereof; And a scrap bar that is elastically installed in the axial direction on the front surface of the punch holder while the piercing punch passes and press-contacts the side of the drawing press product to the fixed die during punching.

According to such a structure, setting is completed simply by putting a drawing press product, such as a fluorescent lamp shade, on a fixed die. In addition, since the piercing is made directly in the direction of motion of the working cylinder, the structure of the piercing device is further simplified.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

2-6 show a preferred embodiment of a side piercing device for a drawing press product according to the present invention.

2 and 3 show the overall structure of a piercing apparatus according to the present invention.

2 and 3, the piercing apparatus of the present invention includes fixing dies 30 on both sides of the bed 10. As shown in FIG. Both sides of the inner surface of the drawing press product are set in close contact with the fixing dies 30 on both sides. That is, the drawing press product is covered with the fixed die 30 so that both inner surfaces thereof are in close contact with the outer surfaces of the both fixed dies 30.

An operation cylinder 50 is installed outside the fixed die 30. The piston 52 of this working cylinder 50 moves back and forth toward the stationary die 30. That is, it is a structure for directly piercing the side surface of the drawing press product set on the fixed die 30 by the horizontal operation cylinder (50).

A movable die 70 is installed at the end of the piston 52 of the working cylinder 30 to move forward and backward by the piston 52. In the illustrated embodiment, the movable die 70 is fixed to the end of the piston 52 via the auxiliary plate 80. Alternatively, the movable die 70 may be directly fixed to the end of the piston 52 or may be directly formed.

The punch holder 90 is installed in the movable die 70. The punch holder 90 is provided with a piercing punch 100 corresponding to the type and number of holes to be drilled.

The scrap bar 110 is installed on the front of the punch holder 90. The scrap bar 110 pushes the side of the drawing product to serve to press-contact the fixed die 30. The piercing punch 100 is slidably inserted into the through hole 112 (see FIG. 5) of the scrap bar 110 to move the through hole 112 after the scrap bar 110 is in close contact with the side of the drawing product. Punching is performed.

In the present embodiment, the support 130 is installed on the bed 10 on both sides of the movable die 70. The guide bar 132 protrudes from this support 130. The support 130 and the guide bar 132 serve to guide the retreat of the movable die 70. To this end, guide holes 72 are formed at both sides of the movable die 70 to be slidably coupled to the guide bar 132.

On the other hand, in this embodiment, both sides of the working cylinder 50, the pipeline 200 for supplying the pneumatic or hydraulic pressure is piped, the switching valve 202 is provided in the middle of the pipeline 200, this switching valve A switch 204 is provided for the control of 202. The switching valve 202 is supplied with pneumatic or hydraulic pressure from a predetermined pneumatic or hydraulic supply source, and the pneumatic or hydraulic flow supplied to the operating cylinder 50 is changed by the operation of the switching valve 202 so that the piston 52 is moved. Will be advanced or retracted.

2 and 3, the member number '220' is a 'support' which will be described later.

4 to 6 show the structure of the fixed die 30, the coupling structure of the scrap bar 110 and the punch holder 90, and the coupling structure of the scrap bar 110 and the piercing punch 100 in detail. .

4 to 6, a punching hole 32 for piercing is formed on the outer surface of the fixed die 30. The punching hole 32 is paired with the piercing punch 100.

In the illustrated embodiment, the discharge hole 34 communicating with the punching hole 32 is formed vertically in the fixed die 30. The discharge port 34 serves to discharge the crushed pieces from the drawing press product by the piercing punch 100 to be discharged. Therefore, the discharge port 12 corresponding to the discharge port 34 is formed in the bed 10 so that the crushed pieces falling into the discharge hole 34 fall down the bed 10 through the discharge hole 12. Below the bed 10 may be provided with a storage container (not shown) containing the falling crushed pieces.

The scrap bar 110 is fixed to the punch holder 90 so as to allow a certain range of sliding movement by the coupling shaft 150. In the illustrated embodiment, the shaft portion 152 of the coupling shaft 150 is slidably passed through the guide hole 92 formed in the punch holder 90 so that the male screw portion 154 formed at the end thereof is scraped. Screwed to the female threaded portion 114 of the bar 110 is fixed.

In addition, the rear of the punch holder 90 is formed with a receiving groove 94 for receiving the head portion 156 of the coupling shaft 150. The receiving groove 94 is formed deeper than the height of the head 156. Therefore, the scrap bar 110 is able to move in the axial direction within the height difference between the receiving groove 94 and the head 156.

In addition, a compression spring 160 is interposed between the scrap bar 110 and the punch holder 90. The compression spring 160 exerts a repulsive force to elastically push the scrap bar 110 from the punch holder (90). In the illustrated embodiment, the compression spring 160 is installed on the coupling shaft 150. The scrap bar 110 is always maintained in the advanced state toward the fixed die 30 by the elasticity of the compression spring (160). Accordingly, the head 156 of the coupling shaft 150 is maintained in close contact with the front of the receiving groove 94 of the punch holder 90.

In addition, the support bar 220 may be further installed on the scrap bar 110. In the illustrated embodiment, the support 220 is fixed to the scrap bar 110 through the bolt 230. The support 220 is entered while maintaining only a small gap in the upper surface of the drawing press product. The support 220 supports the upper surface of the drawing press product when the scrap bar 110 is in close contact with the side of the drawing press product set on the fixing die 30, thereby helping to maintain a stable contact of the scrap bar 110. Play a role.

The tip of the piercing punch 100 is inserted into the through-hole 112 formed in the scrap bar 110 so as to be slidable. The tip of the piercing punch 100 inserted into the through hole 112 does not protrude from the scrap bar 110. As a result, the piercing punch 100 is not in contact with the drawing press product even when the scrap bar 110 contacts the side of the drawing press product. Thus, the piercing punch 100 is only present on the side of the drawing press product when the punch holder 90 further advances while compressing the compression spring 160 after the scrap bar 110 contacts the side of the drawing press product. Perforation is only achieved by contact.

In other words, the scrap bar 110 is in close contact with the side of the drawing press product before the piercing punch 100 contacts the side with the drawing press product. As a result, the piercing punch 100 is retracted after drilling to escape from the drawing press product after completely exiting the drawing press product. Thus, the scrap bar 110 is in close contact with the side of the drawing press product to the fixed die 30 prior to the piercing punch 100 to ensure a stable drilling operation. In addition, even when the piercing punch 100 is retracted after drilling, the drawing press product is pressurized so that the piercing punch 100 is easily separated without being caught in the hole drilled in the drawing press product, thereby obtaining a precise drilling hole. In addition, it prevents deformation of the drawing press product.

7 shows a pneumatic or hydraulic circuit for operating the actuating cylinder 50.

As shown, both sides of the working cylinder 50 is piped 200 for supplying the pneumatic or hydraulic pressure for driving the piston 52 is piped. In the middle of the conduit 200 is provided with a switching valve 202 to selectively actuate pneumatic or hydraulic pressure to the outside and the inside of the working cylinder (50). This switching valve 202 is preferably a solenoid valve as shown. The switching valve 202 is controlled by the operation of the switch 204. The switching valve 202 is supplied with pneumatic or hydraulic pressure from a predetermined pneumatic or hydraulic supply source 206. The working cylinder 50 is more stable composed of a pneumatic cylinder.

Next, the operation of the side piercing device for a drawing press product according to the present invention will be described with reference to the accompanying drawings, FIGS. 8A to 8D. Here, the drawing press product describes the ceiling lampshade 2 described in FIG. 1 as an example. And the working cylinder 50 will be described by using a pneumatic cylinder as an example.

First, FIG. 8A shows an initial state in which a ceiling lamp shade is set. When the inlet portion of the ceiling press lampshade 2 is pressed down and placed on the fixed die 30, both sides of the inner surface of the ceiling lampshade 2 coincide with the fixed die 30. Therefore, both sides of the ceiling lampshade (2) the inner surface is in close contact with the outer surface of the fixed die 30, the setting is made easily.

8B illustrates a state in which the scrap bar 110 is advanced by the operation cylinder 50 to be in contact with the ceiling lampshade. After setting of the ceiling lampshade 2 as shown in FIG. 8A, the switching valve 202 switches the pneumatic pressure from the pneumatic source 206 to the outside of the working cylinder 50 by the operation of the switch 204. When the piston 52 of the working cylinder 50 is advanced. As a result, the movable die 70 fixed to the tip of the piston 52 of the working cylinder 50 and the punch holder 90 fixed to the movable die 70 and the scrap bar 110 are advanced together. In this case, the movable die 70 is advanced by sliding along the guide bar 132 of the support 130. The scrap bar 110 advanced in this manner supports the side of the ceiling lampshade 2 set on the fixed die 30. The support bar 220 on the upper side of the scrap bar 110 covers the upper surface of the ceiling lampshade 2 to prevent the separation or skew of the ceiling lampshade 2.

8C shows the perforated state. As shown in FIG. 8B, even when the scrap bar 110 contacts the side surface of the ceiling lampshade 2, the piercing punch 100 is not yet in the state of reaching the ceiling lampshade 2. The punch holder 90 is advanced while compressing the compression spring 160 as the piston 52 continues to advance after the scrap bar 110 contacts the side of the ceiling lampshade 2. At this time, the punch holder 90 advances along the coupling shaft 150. Since the coupling shaft 150 is fixed to the scrap bar 110 by screwing, the receiving groove 94 of the punch holder 90 is advanced so that the head 156 of the coupling shaft 150 is the receiving groove 94. ) In this way, the piercing punch 100 is advanced to puncture the side of the ceiling lampshade (2). The cutting piece 310 generated by the drilling is passed through the punching hole 32 of the fixed die 30 to the discharge port 34, and is discharged through the discharge port 12 formed in the bed 10 again.

Next, FIG. 8D shows a state in which the piercing punch 100 retreats after drilling. When the drilling is completed as shown in Figure 8c, the switching valve 202 is switched to supply the pneumatic pressure in the opposite direction during the drilling. Accordingly, the piston 52 retreats, and the movable die 70 and the punch holder 90 retreat as the piston 52 retreats. At this time, since the scrap bar 110 maintains a state in which the ceiling lampshade 2 is elastically pressed by the compression spring 160, the punch holder 90 until the compression spring 160 returns to its original state. Only retreat. Therefore, the piercing punch 100 is first released from the installation hole 7 which is the drilling hole of the ceiling lampshade 2.

As the piercing punch 100 retreats, the scrap bar 110 continuously adheres the lampshade 2 to the fixed die 30 by the elasticity of the compression spring 160, thereby piercing the punch 100. ) Can be detached well without being caught in the installation hole (6).

When the punch holder 90 is continuously retracted and the compression spring 160 is restored to its initial state, the head 156 of the coupling shaft 150 is pulled by the receiving groove 94 of the punch holder 90. As a result, the scrap bar 110 is retracted.

When the scrap bar 110 is completely removed from the ceiling lampshade 2 in this way, the ceiling lampshade 2 is lifted from the fixing die 30 and replaced with a new ceiling lampshade 2.

In the above description, the ceiling lampshade has been described as an example of the drawing press product, but as described above, the present invention is not limited to the ceiling lampshade, and it will be obvious that the present invention can be applied to both the drawing press products forming a square or polygon.

In addition, although the specific embodiments of the present invention have been described in detail through the accompanying drawings, this is merely an example, and the protection scope of the present invention is not limited. In addition, the embodiments of the present invention as described above can be variously modified and equivalent other implementations by those of ordinary skill in the art within the technical spirit of the present invention, such modifications and other equivalent implementations of the present invention It is obvious that the claims belong to the appended claims.

As described above, the present invention can easily perform the side piercing operation of the product drawn in the shape of a square or polygonal container, such as a ceiling lampshade using a pneumatic or hydraulic cylinder.

In the related art, a linkage means for converting a vertically descending press's movement path into a horizontal motion has to be added separately, resulting in a complicated structure and an expensive closure. However, since the piercing device according to the present invention is a structure that is directly pierced by the movement path of the working cylinder that moves while facing the side of the drawing press product, it is possible to implement a piercing device having a very simple structure that does not require a change of movement.

Therefore, using the piercing device of the present invention, which can be manufactured simply and in small scale, in place of the conventional complex and large press mold, productivity and cost reduction can be achieved.

Claims (6)

An apparatus for piercing the side of a drawing press product, Fixing die 30 is installed on both sides of the bed 10 so as to closely support both sides of the inner surface of the drawing press product, the punching hole 32 for piercing is formed on the outer surface; An operation cylinder (50) installed outside the fixed die (30) to advance and retract the piston (52) toward the fixed die (30); A movable die (70) fixed to an end of the piston (52) of the working cylinder (50); A punch holder 90 fixed to the movable die 70 and having a piercing punch 100 corresponding to the punching hole 32 of the fixed die 30 installed on a front surface thereof; And The piercing punch 100 is passed through the axially elastically installed on the front surface of the punch holder 90 includes a scrap bar 110 to press-contact the side of the drawing press product to the fixed die 30 when punching. Side piercing device for a drawing press product, characterized in that. The method of claim 1, In order to guide the retreat of the movable die 70, a support 130 is installed on the bed 10 on both sides of the movable die 70, and a guide bar 132 protrudes from the support 130. And side guide holes (72) of the movable die (70) are slidably coupled to the support bar (132). The method of claim 1, The scrap bar 110 is fixed to the punch holder 90 so as to be able to slide in a predetermined range by the coupling shaft 150, and the coupling bar 150 is elastically fixed to the scrap bar 110 and the punch holder 90. Side piercing device for a drawing press product, characterized in that the compression spring 152 for applying the repulsive force is installed. The method according to claim 1 or 4, The scrap bar 110 and the moving range are such that the piercing punch 100 is in close contact with the side of the drawing press product before the piercing punch 100 contacts the side of the drawing press product, and after punching the piercing punch 100 is completely removed from the drawing press product. A side piercing device for a drawing press product, characterized in that it is set so as to be disengaged from the side of the drawing press product after leaving. The method of claim 1, In the fixed die 30, a discharge hole 34 communicating vertically with the punching hole 32 is formed to drop a piece of the drawing press product introduced into the punching hole 32 according to the drilling, and the bed ( 10) A side piercing device for a drawing press product, characterized in that the discharge port 12 is connected to the discharge port 34 is formed. The method of claim 1, The lateral piercing device for the drawing press product, characterized in that the working cylinder (50) is a pneumatic cylinder.