KR102485900B1 - A mold assembly having a pair of forming punch - Google Patents

Abstract

The present invention proposes a mold which has burrs in the same direction and enhances productivity. The mold of the present invention comprises: an upper holder (1) which has a punch installed beneath and moves up and down; and a lower holder (6) which has a die (5) provided on an upper portion thereof and is fixed. To insert a pair of plate-type materials in parallel, a pair of feeding parts (Fa, Fb) are provided on the upper portion of the die (5) by installing guides (12a, 12b, 12c). To form a pair of wedge parts on one side of the material, wedge machining parts (18, 20) of a punch are arranged in different directions based on a transfer direction of the pair of materials, thereby placing the first punch part (Pa) and the second punch part (Pb). A semi-finished product with one wedge part formed in the first punch part (Pa) is inserted into the second punch part (Pb) to form another wedge part on the same side. Accordingly, a pair of wedge parts are created while forming burrs in the same direction.

Description

A press mold assembly having a pair of punches capable of processing a pair of sheets {A mold assembly having a pair of forming punch}

The present invention relates to a press mold assembly having a punch capable of press-processing a pair of sheets. It relates to a press mold assembly configured to be processed in the same direction to generate burrs in the same direction and to improve productivity.

Looking at the object to be processed in the form shown in Figure 1, it can be seen that a sheet having a certain length is press-processed using a punch. The product to be processed according to the present invention is a transverse frame of a rack substantially made of steel. In addition, it can be said that such an object to be processed is a molded part having wedge pieces A and B having symmetrical shapes on the same side in a substantially flat sheet.

This molding part is a wedge piece inserted into a tapered slot formed in the vertical frame, and can be said to be an essential protruding piece for assembling a metal rack. Such wedge pieces (A, B) can be said to be parts that are formed simultaneously by a punch, like the chamfer parts (m, n) formed on the opposite parts of their transverse parts. However, since the subject of the present invention is the molding of the wedge pieces A and B, a detailed description of the chamfer portions m and n will be omitted.

Here, the wedge pieces A and B must be formed with burrs in the same direction so that they can be accurately assembled into the slots of the vertical frame. That is, with reference to FIG. 1 , it can be said that the wedge pieces A and B on both sides are formed by downward-moving punches to produce burrs in the same direction. And since the wedge pieces A and B are for making a metal rack, they must be molded on the same side. The wedge pieces A and B on both sides show an embodiment having a tapered shape that becomes narrower toward the outside.

In this way, in order to mold a pair of wedge pieces A and B to have burrs in the same direction on a single metal sheet, different molds are generally required. Preparing a separate mold in this way actually makes the mold device have a large overall volume, and accordingly, the process of molding the product as described above using it is inevitably more cumbersome.

The present invention is to propose a mold assembly capable of sequentially processing two protrusions having a sheet shape and having burrs formed in the same direction on one side.

The mold assembly according to the present invention includes an upper holder on which a punch is installed and moving up and down, and a lower holder having a die on the upper portion and being fixed. In addition, a pair of feeding parts are created by installing a guide at the top of the die so that a pair of plate-shaped base materials can be input side by side. Here, in order to form a pair of wedge pieces on one side of the base material, the wedge processing parts of the punch are disposed in different directions based on the transfer direction of the pair of base materials to divide the first punch part and the second punch part. The semi-finished product in which one wedge piece is molded in the first punch unit described above is put into the second punch unit to form another wedge piece on the same side, so that the pair of wedge pieces are made with burrs in the same direction. do.

According to the present invention having the above configuration, a pair of base materials (or semi-products ) are arranged on opposite sides (outside or inside) of each other. Therefore, a semi-finished product having one wedge piece formed through primary processing is put into the feeding part on the other side and processed through the wedge processing part on the other side, thereby making a finished product that can have burrs in the same direction.

1 is an exemplary view showing a product to be produced.
Figure 2 is an explanatory view of the mold assembly of the present invention as seen from the front.
Figure 3 is an explanatory view as seen from above the mold assembly of the present invention.
Figure 4 is an exemplary view showing the configuration around the stopper of the present invention.

Next, referring to FIGS. 2 and 3, the mold apparatus of the present invention for press-working the product as described above will be described. As such, the mold of the present invention is substantially for making the finished product shown in FIG. 1, so reference is made to FIG. 1 for the final finished product. In the following description, detailed descriptions of typical presses and molds including punches will be omitted, and only configurations related to the gist of the present invention will be described in detail.

The mold assembly of the present invention includes an upper holder 1 that is supported by a press device and moves up and down, and a lower holder 6 that is fixed to the device. Parts for press processing are mounted on each of the upper holder 1 and the lower holder 6, and these various parts can be said to be widely used in practice, and detailed descriptions of these well-known parts are briefly mentioned. Explain.

Although it is a well-known configuration, looking briefly, a punch is installed in the upper holder 1 to process the object to be processed in the form of a sheet by elevating and descending, and the upper part of the lower holder 6 has a die that supports the object to be lifted and transported. (5) is provided. A punch fixing plate 3 for fixing a punch to be described later is installed at the bottom of the upper holder 1, and a movable stripper 4 is supported on the upper holder 1 by a stripper support bolt 16 at the bottom thereof .

Here, a punch that is supported by the upper holder 1 and moves up and down in order to mold a product will be described later with reference to FIG. 3 . And, the die 5 is supported on the lower holder 6 in a fixed state, and the plate-shaped base materials Ma and Mb are transferred onto the die 5. A guide pin 9 is installed in an upright state at the bottom of the upper holder 1, and a guide bush 10 for receiving and guiding the guide pin 9 is installed on the die 5. A punch is installed in such an upper holder 1 to process the base materials Ma and Mb.

In the present invention, a guide device capable of simultaneously guiding a pair of base materials Ma and Mb in parallel is installed on the die 5. In the illustrated embodiment, the guide device consists of three guides 12a, 12b, and 12c. is being composed By the three guides 12a, 12b, and 12c, the left and right base materials Ma and Mb can be guided on the die 5 side by side.
That is, it can be seen that two feeding parts Fa and Fb are formed by the three guides 12a, 12b and 12c. And in the illustrated embodiment, as shown in FIGS. 2 and 3, it has a shape protruding upward so as to guide the base materials Ma and Mb therebetween. However, it goes without saying that various modifications are possible within a structural range that allows a pair of base materials to be guided side by side at the same time.
And, as shown in FIG. 3 in the present invention, being able to perform punching by feeding a pair of base materials (Ma and Mb) together has a very important meaning, like the structure of a punch described later. In the present invention, the base material (Ma, Mb) is plate-shaped, but it is possible to supply it in a sheet state, and it is also possible to supply it in a roll state during the primary processing.
For example, when a base material in a roll state is supplied, after a certain amount of feeding, it is stopped by a stopper to be described later and processed by a punch. And after being cut by a separate mold, it is discharged in a sheet state and supplied in a sheet state during secondary processing. Here, the feeding and cutting (parting) of the base material will be performed by a separate device.

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As described above, the product of the present invention has a pair of wedge pieces A and B molded on the same side surface as described in FIG. 1 . And, as shown in 3, the punches 17, 18, 19, and 20 of the present invention have a shape protruding outward, and the wedge pieces A and B fitted into the slits processed in the vertical frame of the metal rack It is provided with a wedge machining part (18, 20) for processing.

In addition, the punches 17, 18, 19, and 20 of the present invention also include chamfers 17 and 19 for picking the edges of the base material located inside the wedge processing portions 18 and 20. It is easy for those skilled in the art to know that it is preferable that the punches having the wedge processing parts 18 and 20 and the chamfering parts 17 and 19 are made of one whole. Here, for convenience of explanation, the wedge processing part 17 and the chamfering part 20 on the left side of FIG. 3 are referred to as the first punch part Pa, and the wedge processing part 18 and the chamfering part 19 on the right side It will be referred to as the second punch portion Pb.

The wedge pieces A and B made by the wedge processing parts 18 and 20 must be molded at the front and rear ends of the same side, respectively. For the processing of such wedge pieces A and B, in the present invention, the above-described wedge processing parts 18 and 20 are disposed on opposite sides of each other. That is, as shown in FIG. 3, the wedge processing part 18 of the first base material Ma is arranged to be located on the right side from the center, and the wedge processing part 20 of the second base material Mb is located at the center It is placed so that it is located on the left side.

That is, it can be seen that in the punch of the present invention, all of the wedge processing parts 18 and 20 are installed outside the feeding direction of the base material. In addition, the chamfers 17 and 19 are installed on the inner side close to each other, and the positions of the chamfers 18 and 20 can also be said to be disposed in opposite directions with respect to the feeding directions of the base materials Ma and Mb.

In the present invention, when the base materials Ma and Mb are fed onto the die 5, a stopper 30 is provided to stop the base materials Ma and Mb by contacting the front ends of the base materials. These stoppers (Sa, Sb) can be said to be for setting the proper position of the base material (Ma, Mb) to be substantially fed. When the stopper 30 protrudes above the die 5, the base material to be transferred comes into contact with it to stop the transfer and the punching operation is performed.

With reference to the embodiment shown in FIG. 4, a more detailed configuration of the stopper will be described. The stopper 30 always receives an elastic force downward by the spring 32 . For example, a spring is installed between the extended lower part 30a of the stopper 30 and the locking jaw 33 of the stopper ball 31, so that the elastic force of the spring 32 presses the stopper 30 downward do.

And, when the lower part 30a of the stopper 30 enters the receiving groove 8a of the slider 8 installed in the horizontal direction, the upper end of the stopper 30 is positioned lower than the die 5. Here, when the slider 8 moves to the left in the drawing by the pneumatic cylinder 7, the lower part 30a of the stopper 30 moves to the upper surface 8b of the slider 8. In this case, the upper end of the stopper 30 protrudes beyond the die 5 .

As shown in FIG. 4, when plate-shaped base materials Ma and Mb (possibly roll-shaped base materials) are transferred in a state where the stopper 30 protrudes upward from the die 5, these base materials Ma, The front end of Mb) comes into contact with the above-described stopper 30 and stops. In this state, the descending punches 17, 18, 19, and 20 primarily process the base materials Ma and Mb. Here, the primary processing is to form one wedge piece (B) on one side of the base material (Ma, Mb), as shown in FIG. 1 (a).

During this primary processing, one wedge piece (B) is formed on one side of the base materials (Ma, Mb) by the first punch portion (Pa) and the second punch portion (Pb), respectively. Here, since the wedge processing part 17 of the first punch part Pa and the wedge processing part 18 of the second punch part Pb are provided on opposite sides of the base materials Ma and Mb, The wedge piece (B) made by is also molded on the opposite side of each base material (Ma, Mb), as shown in (a) of FIG.

After the primary processing is completed, the secondary processing should be performed. As shown in (b) of FIG. To form another wedge piece (A). At this time, the first wedge piece (B) and the second wedge piece (A) should be formed to have burrs in the same direction, which means that the wedge piece (A) and the wedge piece (B) are molded by a punch moving in the same direction. means it should be

To this end, the base material (Ma, Mb) for which the primary processing has been completed is put on the die 5 again to perform the second processing (punching). At this time, the semi-finished product processed in the first punch unit Pa (see FIG. 1(a)) is put into the second punch unit Pb, and the semi-finished product processed in the second punch unit Pb is placed in the first punch unit ( Pa) is injected. Here, since the second wedge piece (A) should be molded on the same side as the first wedge piece (B), the input direction of the semi-finished product should be put in according to the position of the wedge processing parts (18, 20) of the punch in consideration of this. do.

When this secondary punching is performed, the second wedge piece (A) as shown in FIG. 1 (b) is formed on the same side as the first wedge piece (B), and the second wedge piece (B) The second wedge piece A is molded to have burrs in the same direction in practice. Here, when the primary processing is completed by the first punch part (Pa) and the semi-finished product (Ma) in which one wedge piece (B) is formed is put into the same first punch part (Pa), a pair of wedge pieces In (A, B), burrs are created in opposite directions.

In this way, while processing a pair of wedge pieces A and B at the front and rear ends of the same side of the base material, processing to have burrs in the same direction is a pair of base materials on the die 5 ( It is based on arranging the wedge processing parts 18 and 20 of the punch so that the wedge pieces can be formed on the outside rather than the inner side adjacent to each base material while configuring so that Ma.Mb) can be input in parallel at the same time.

When processing the above-described product using the mold assembly of the present invention, it is expected that productivity can be significantly improved substantially by performing a plurality of primary processing and then performing a plurality of secondary processing.

A, B ..... Wedges
Ma, Mb ..... base material
1 ..... Upper holder
3 ..... punch fixing plate
4 ..... movable stripper
5 ..... die
6 ..... Lower holder
7 ..... Pneumatic cylinder
8 ..... Slider
17, 18 ..... Punch wedge work
19, 20 ..... Chamfer of punch
30 ..... stopper
32 ..... spring

Claims (1)

In a press mold assembly having an upper holder (1) in which a punch is installed and moving up and down, and a lower holder (6) having a die (5) fixed thereon;
Three guides 12a, 12b, and 12c are installed on the top of the die 5 so that a pair of plate-shaped base materials can be injected side by side, so that a pair of base materials (Ma.Mb) can be simultaneously and parallelly injected. forming a pair of feeding parts Fa and Fb;
The wedge processing parts (18, 20) of the punch for forming a pair of wedge pieces on one side of each base material are provided in different directions based on the transfer direction of the pair of base materials, and the edge of the other side of each base material Divided into a first punch portion (Pa) and a second punch portion (Pb) each having chamfer portions 17 and 19 for picking;
When the base materials (Ma, Mb) are fed to the feeding parts (Fa, Fb) of the die (5), a stopper (30) is installed to stop the base materials (Ma, Mb) by contacting the front ends of the base materials;
In the first feeding unit (Fa), the semi-finished product in which one wedge piece is formed by the first punch unit (Pa) is put into the second punch unit (Pb) of the other second feeding unit (Fb), and the second feeding unit ( The semi-finished product in which one wedge piece is molded in the second punch part (Pb) of Fb) is put into the first punch part (Pa) of the first feeding part (Fa), and another wedge piece is further formed on the same side of the base material. By forming, the pair of wedge pieces are made while burrs are created in the same direction.

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