KR20010067834A - Forming method the many step form possible press one stroke and the tool equipment - Google Patents

Abstract

PURPOSE: A method capable of drawing in multi-stage in one stroke of a press and a metal mold apparatus used therefor are provided to maximize the productivity, while minimizing investment for equipment. CONSTITUTION: A method capable of drawing in multi-stage in one stroke of a press includes the steps of blanking a predeterminedly-standardized metal material as a circular shape to be easily formed, drawing the circular metal material to be protruded toward by supporting the edge of the circular metal material, reversely drawing the upper part of the metal material as the shape of an upper punch(112), reversely drawing the bottom of the metal material, and trimming a coarse part of the lower end of the metal material.

Description

FORMING METHOD THE MANY STEP FORM POSSIBLE PRESS ONE STROKE AND THE TOOL EQUIPMENT}

The present invention relates to a drawing forming method and a mold apparatus for molding a metal material, and more particularly, a primary drawing drawn in one stroke, and a secondary drawing for reverse drawing the metal material on which the primary drawing is completed; The present invention relates to a drawing molding method and a mold apparatus used in the method, in which the drawn metal material is reverse-drawn again to third drawing and finally trimmed and formed in multiple stages in a press stroke.

In general, in order to be drawn in multi-stage, it is a general method to produce a large amount of equipment and a large number of processes, and there is a problem that a worker resides in the large amount of equipment and hassle of sending a molded product to the next process at the end of one process. There was.

In addition, the transfer press (Transfer Press) was introduced to produce in order to cope with the above-described conventional method, but also, because of the enormously expensive equipment can be operated only in large companies, there was a problem that is not universal to general SMEs.

In addition, a double, that is, a device for drawing secondly has been used in the past, but after the second drawing, trimmed scraps are caught between the upper die of the mold and the primary die and automatically produced, resulting in frequent defects in the process. There was a problem that the cut and repaired man hour is excessively input and the productivity is reduced, but the manufacturing cost is excessively input.

The present invention has been made to solve the above-described problems, the object of the present invention is to be a deep drawing of up to 3.5 times the drawing ratio (recognition) that was recognized as impossible in the art so that a large amount of conventional equipment and a large amount of The process is made possible by a single press stroke to minimize the investment cost of the equipment but to maximize the productivity.

In addition, another object of the present invention to contribute to the industrial development by enabling the operation of the unmanned automation factory in small and medium-sized factories or small-scale factories by enabling the deep drawing with one equipment and one stroke.

In addition, another object of the present invention is to enable molding in the fourth step to minimize the equipment investment, but to maximize the productivity.

1 is a perspective view showing a known hydraulic press showing a state provided with a mold apparatus of the present invention,

2 to 10 are cross-sectional views for explaining the sequential operation of the mold apparatus of the present invention, Figure 2 shows an initial state in which a conventional metal material is placed on top of the lower mold, each of the mold apparatus of the present invention It is sectional drawing shown in detail about a structure,

3 is a cross-sectional view showing an operation of starting to be primarily drawn by blanking a metal material in an annular shape,

4 is a cross-sectional view showing an operation in which the primary drawing is completed;

5 is a cross-sectional view for explaining an operation of starting secondary drawing.

FIG. 6 is a cross-sectional view illustrating a first trimming operation in which the secondary drawing is completed and the first trimming in the mold apparatus of the present invention;

7 is a cross-sectional view for explaining the operation of starting the third drawing,

8 is a cross-sectional view for describing an operation in which tertiary drawing is completed and finally secondary trimming.

9 is a cross-sectional view showing an initial state in which the mold apparatus of the present invention returns and takes out the base material on which the tertiary drawing is completed;

FIG. 10 is a cross-sectional view for describing an operation drawn in a fourth order as another embodiment of the present invention.

11 is a perspective view showing stepwise the base material completed by each operation of the mold apparatus of the present invention,

12 is a block diagram showing a work sequence for each process according to the present invention.

* Explanation of symbols for the main parts of the drawings

10; hydraulic press 10a, 10b; upper, lower holder

11; hydraulic cylinders 11a, 11b; first and second cylinder

12; slide guide 13, 14; first and second die cushion

100; mold apparatus 110; upper mold

111; upper die 112; upper punch

120; lower mold 121; blanking die

122; support 123; first fixture

124; pad 125; second fixture

126; trimming die BL; blanking step

D1; primary drawing step D2; secondary drawing step

D3; tertiary drawing step MT; intermediate trimming step

FT; trimming step

The present invention relates to a drawing process to be molded by the lowering of the press,

The drawing process comprises: a blanking step of shearing circularly to facilitate molding of a metal material having a predetermined standard;

A primary drawing step of supporting the edge of the circular metal material obtained in the blanking step and drawing it to protrude upward;

A second drawing step of reverse drawing an upper portion of the metal material oriented in the first drawing step in the shape of an upper punch;

A third drawing step of reverse drawing again on the bottom of the metal material on which the reverse drawing is completed in the second drawing step;

It comprises a trimming step of cutting and finishing the non-beautiful portion of the bottom of the metal material is completed the third drawing.

In addition, the present invention is provided between the upper holder which is lowered by the hydraulic cylinder provided on the top of the known hydraulic press, and the lower holder provided on the lower end of the upper holder is meshed with each other to form a conventional metal material into a predetermined shape. The drawing mold apparatus to

The mold apparatus includes an upper holder which is lowered by a hydraulic cylinder, an upper die which is mounted below the upper holder, and a center of the upper die, which is simultaneously lowered by the lowering of the upper holder and formed to have a predetermined time difference. An upper mold composed of an upper punch;

A blanking die provided on an upper portion of a lower holder provided at a lower end of the upper holder, intersecting with a blanking portion formed at a lower end of the upper die, and shearing a metal material in a circular shape; A support for raising and lowering by the second die cushion provided on the lower side of the hydraulic press and the first drawing, and the inside of the support for primary drawing, the lowering of the support by the outer step formed on the outer periphery The first fixture is to limit the height, and provided on the inside of the first fixture, to be moved up and down by a second die cushion, and the rising height by the inner step formed inside the first fixture is limited and secondary drawing And a pad provided inside the pad so as to be three-dimensionally drawn by the upper punch, but a lower portion of the metallic material is completed. It comprises a lower mold consisting of a second fixture having a trimming die to shear the bottom of the.

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

1 is a perspective view showing a known hydraulic press showing a state provided with a mold apparatus of the present invention, Figures 2 to 10 are sectional views shown for explaining the sequential operation of the mold apparatus of the present invention. FIG. 2 is a cross-sectional view illustrating an initial state in which a conventional metal material is placed on an upper portion of a lower mold. FIG. 3 is a cross-sectional view illustrating each component of the mold apparatus of the present invention in detail. FIG. 4 is a cross-sectional view illustrating an operation of starting a primary drawing, FIG. 4 is a cross-sectional view illustrating an operation of starting a secondary drawing, and FIG. 5 is a cross-sectional view of an operation of starting a secondary drawing, and FIG. 6 is a secondary drawing. This is a cross-sectional view for explaining the operation of the first trimming in the mold apparatus of the present invention is completed, Figure 7 is for the operation of starting the third drawing 8 is a cross-sectional view for explaining an operation in which the tertiary drawing is completed and finally the second trimming is completed. FIG. 9 is a cross-sectional view of the mold apparatus of the present invention. 10 is a cross-sectional view showing the initial state of taking out the completed base material, Figure 10 is a cross-sectional view for explaining the operation of the fourth drawing as another embodiment of the present invention, Figure 11 is shown by each operation of the mold apparatus of the present invention Figure 12 is a perspective view showing a completed base material step by step, Figure 12 is a block diagram showing a work order by process according to the present invention.

As shown in Figure 1, the mold apparatus 100 of the present invention is provided in a known hydraulic press 10, by the operation of descending the hydraulic cylinder 11 provided on the upper portion of the hydraulic press 10. The upper holder 10a is lowered, and the upper mold 110 of the present invention is mounted on the upper holder 10a so that the upper mold 110 is lowered by the lowering of the hydraulic cylinder 11.

The lower mold 120 is provided on the lower side of the upper mold 110 to be engaged by the lowering operation of the upper mold 110 and the molding of the product is performed in each step. It is engaged by a pressure corresponding to the pressure falling from the top by Die Cusion of the drawing and trimming operation to be described later is made sequentially and the molding is completed (hereinafter, as shown in the center) Hydraulic cylinder and die cushion provided in the first hydraulic cylinder (11a), the first die cushion 13, and the hydraulic cylinder and die cushion provided on both sides of the second cylinder (11b), the second die cushion (14) Called)

Hydraulic press 10 is provided with a mold apparatus 100 of the present invention is provided with a slide guide 12 for accurate lowering operation to both sides of the upper holder (10a) and the lower holder (10b).

On the other hand, three cylinders of the second cylinder 11b and the second die cushion 14 are formed at an isometric angle to the outside of the first cylinder 11a and the first die cushion 13 provided in the center of the hydraulic press 10. It is provided.

As shown in FIG. 2, in the mold apparatus 100 of the present invention, a circular upper mold 110 is mounted below the upper holder 10a connected to the second cylinder 11a.

The upper mold 110 is roughly divided into an upper die 111 and an upper punch 112. The lower outer periphery of the upper die 111 intersects the blanking die 121 to be described later and shears the metal material SP. That is, a blanking part 111a for blanking is formed, and the drawing hollow part 111b is formed so as to be primarily drawn in the inner circumference having a predetermined depth.

An upper punch 112 is provided at an upper center of the drawing hollow part 111b at a predetermined time difference with the upper die 111 by the first cylinder 11a. The secondary drawing (D2) will be made to be described later as the peripheral edge, and the third drawing (D3) is made as the inner circumference of the hollow portion 112b.

In addition, a trimming round 112a is formed at a lower inner circumference of the hollow part 112b to trim the final lowered and roughened lower end of the second fixing tool 125. It is a structure to be in contact with the trimming die 126 provided on the lower side.

In addition, the lower mold 120 formed in a circular shape similar to the upper mold 110 is provided at the bottom, and the outer portion of the lower mold 120, the blanking portion 111a and the inner circumference of the upper die 111 described above. The blanking die 121 is provided to cross and blank the metal material SP, and the inner side of the blanking die 121 is engaged with the lower end of the upper die 111 so as to be blanked. A support 122 is provided to support the metal material SP formed in a circular shape and to make the primary drawing D1.

Three second die cushions 14 are provided at an equilateral lower portion of the support 122 to be lowered to a pressure comparable to the pressure of the upper die 111 described above, so that the first drawing D1 is made. Will be.

In addition, the first fixing tool 123 is provided inside the support 122.

The first fixture 123 is fixed to the lower holder (10b), the outer step 123a is formed on the outer circumference lowering operation of the support (122) descending by the second die cushion 14 It is to limit the, and to the inner circumference to form an inner step (123b) to limit the upward operation of the pad 124 to be described later.

The pad 124 is lowered by the first die cushion 13 to the inside of the first fixture 123 and the drawing is made second, and the pad 124 also has a stepped portion 124a at the lower outer periphery. This is formed so that the rising height is limited by the inner step (123b) of the first fixture 123.

In addition, a second fixing tool 125 is provided at the center of the pad 124 to forcibly insert the metal material SP into the hollow part 112b of the upper punch 112 to form the second fixing tool 125. The third drawing (D3) is to be made as described above, and the trimming die 126 is provided at the lower end of the second fixing tool 125, and finally the trimming round 112a formed at the lower end of the hollow part 112b. To be trimmed.

The upper and lower molds 110 and 120 are provided with slide guides 12 on both sides of the upper and lower holders 10a and 10b, respectively, when the upper mold 110 descends. It is to be correctly engaged with (120).

As shown in this, by the above-described configuration, the metal material SP placed on the upper portion of the lower mold 120 is placed in a state before molding and becomes an initial state before operation.

As shown in FIGS. 3 and 4, the above-described upper holder 10a starts to descend, and the blanking portion 111a and the blanking die 121 formed on the outer circumference of the lower end of the upper die 111 are formed. The blanking step BL, which is blanked in a circle so as to facilitate the drawing operation described below, which crosses and is formed in a substantially quadrangular shape SP, is completed.

At this time, the metal material (SP) is blanked as described above formed in a circular shape is supported between the lower portion of the upper die 111 and the support 122 and lowered in an engaged state, the inner side of the support 122 On the basis of the portion provided in the provided first fixture 123 is tensioned by the elongation peculiar to the metal material and is inserted into the hollow portion 111b of the upper die 111.

The metal material SP engaged between the upper die 111 and the support 122 is separated and fully inserted into the hollow part 111b as shown in FIG. 3, as shown in b) of FIG. 11. The drawing is completed first in the same shape, the completion of the primary drawing (D1) and the lower side of the support 122 is caught on the outer step (123a) of the second fixture 123 so that it can no longer descend. The point of view is the same.

At this time, the blanked scrap (SP1) of the above-described metal material (SP), as shown in Figure 11 a) is separated the four corners is naturally separated from the mold apparatus 100 of the present invention.

In addition, as shown in FIGS. 5 and 6, the above-described primary drawing D1 is completed and the upper punch 112 is lowered and the secondary drawing D2 starts. The secondary drawing D2 is performed. Is reverse drawing which is formed opposite to the primary drawing D1, and this time, the upper punch 112 and the pad 124 are engaged with the metal material SP therebetween and descend.

In general, the metal is loaded on one side and the tissue of the metal causes transformation (變態), the tissue is densified on one side, the elongation is stretched on the other side, and the tissue is moved toward the denser side.

At this time, when the load is applied in the opposite direction again, the tissue that has been stretched by the stretching by the operation as described above is in the process of being dense again, the hardness of the metal is decreased, but the elongation is increased, so that the processing is easy.

In the present invention, the above-described secondary and tertiary drawing (D2) and (D3) are made possible by using the above-described metal properties.

Meanwhile, the metal SP separated from the first support 122 and the upper die 111 is sucked into the inner circumference of the second fixing tool 123 by the lowering pressure of the upper punch 112. Secondary drawing D2 is started.

At this time, the upper punch 112, which was lowered by a predetermined depth, has a trimming step 112c as shown on one side of FIG. 6 and intersects the round R formed at the inner circumference of the first fixture 123, and the metal material SP. The end of the intermediate trimming (MT).

The intermediate trimming MT is sheared by adjusting the length of the metal material SP increased by elongation during the first and second drawing D1 and D2, and thus, the middle trimming MT SP2. The length of the may vary depending on the condition of the metal material (SP) being tensioned, but it is not important because it is based on the falling length of the upper punch 112 and the pad 124, c) and d) Molding of the metal material as shown in FIG. Is completed.

As shown in FIG. 7, the metal material SP is hollow formed in the upper punch 112 by the upper part of the second fixing tool 125 provided at the lower center by the upper punch 112 continuously descending. The reverse drawing back to the portion 112b is sucked and the third drawing D3 is started. The metal material SP sucked into the hollow portion 112b is the lower side of the upper punch 112 and the pad 124. It is provided between the upper sides of and is molded at an appropriate pressure to be drawn and gradually sucked.

8 and 9, trimming round 112a formed at the inner edge of the upper punch 112 at the end point of forming the desired product is provided at the lower side of the second fixing tool 125. The trimming FT is finally completed by proper clearance with the trimming die 126, and the upper punch 112 is raised.

At this time, the first die cushion 13, which is compressed and lowered by the rising upper punch 112, rises at the same time as the upper punch 112 rises, and the pad 124 provided on the upper portion rises, and finally the molding is performed. The completed metal material SP is pushed up and taken out to the upper portion of the lower mold 120.

In addition, the upper die 111 and the support 122 are also raised with the rise of the upper punch 112 and a predetermined time difference, and the scrap SP3 generated during the final trimming FT is also the pad ( 124 is present in the upper portion of the lower mold 120 with the metal material (SP), the molding is completed, and the metal material (SP) is completed by the robot system (not shown) It is to be contained in a pallet (Pallet), the scrap (SP3) is separated from the mold apparatus 100 of the present invention by a magnet or air pressure is to complete one stroke.

Shown sequentially in e) and bar) of FIG. 11 is a perspective view of the molding of the metal material SP.

In addition, the drawing method of the multi-step as described above can be easily modified and implemented as many techniques in the art. For example, as shown in FIG. 10, the third cylinder 11c is provided inside the upper punch 112 on the upper portion of the metal material SP on which the tertiary drawing D3 is completed, so that the fourth molding may be performed. It is.

As shown in the figure, only the drilling of the burr by drilling the upper portion of the metal material SP in the upper punch 112, as described above, the groove (top) in the upper portion of the second fixing sphere 125 125a) is formed, and the lower end of the third cylinder (11c) is provided with a punch (P) to fit the groove (125a) to enable the fourth process as described above.

The fourth processing may be a burr molding as shown, or may be forward drawing or reverse drawing as described above, although not shown.

As described above, since the mold apparatus 100 of the present invention enables drawing molding of the metal material SP from 1st to 4th, it is determined that it is almost impossible in the art and is formed by a plurality of equipments and a plurality of processes. It is possible to realize the drawing ratio of 3.5 times, which is the same, by repeatedly performing the above-described operation by only one hydraulic press 10, to improve the productivity through the unmanned automated machine.

FIG. 12 is a schematic block diagram showing a one stroke working process by the above-described mold apparatus 100 of the present invention, which is intended to comprehensively describe the overall process described above.

As shown, the upper die 111 of the upper mold 110 provided at the same time the metal material (SP) having a predetermined standard by the magnetic feeder (not shown) is mounted on the upper portion of the lower mold (120). ) And the upper punch 112 are simultaneously lowered with a predetermined time difference, and the blanking die 121 of the upper die 111 and the lower mold 120 intersects with the metal material SP therebetween at an appropriate tolerance. At the same time, the upper die 111 is engaged with the support 122 with the metal material SP therebetween and continues to descend, and the first drawing D1 is completed in the shape of the first fixture 123.

In addition, the upper punch 112 that descends with a predetermined time difference from the upper die 111 is the first drawing (D1) is completed and at the same time compress the upper portion of the metal material (SP) and the inside of the first fixture 123 It is inserted in the periphery and reverse drawn in the secondary drawing (D2).

The hollow part of the upper punch 112 that is continuously lowered at the same time as the intermediate trimming (MT) operation of cutting the metal material increased by elongation by shearing is completed by the trimming step 112c formed at the outer periphery of the upper punch 112. The metal plate SP is inserted with the second fixing tool 125 of the lower mold 120 and the third drawing D3 reverse drawing is made by the reference numeral 112b.

In addition, the trimming round 112a and the trimming die 126 formed on the lower inner circumference of the upper punch 112 that are lowered come into contact with each other. When the trimming FT is completed, the upper die 111 and the upper die 112 are finished. At the same time, the upper mold 110, which is composed of the upper and second die cushions 13 and 14, at the same time, the pad 124 and the support 122, which are provided on the upper side, are raised, and the molding is completed. ) To be taken out.

The metal material SP taken out to the upper portion of the lower mold 120 is demolded by the robot system and the one-stroke process is completed.

Although not shown, a burr or a drawing process may be performed by the fourth process E4 after the third drawing D3.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Such changes will fall within the scope of the claims.

According to the present invention, it is possible to make a deep drawing of up to 3.5 times the drawing ratio, which is recognized as impossible in the art, and to minimize the investment cost of the equipment by enabling a large amount of conventional equipment and a large number of processes with a single press stroke. Productivity has the maximum effect.

In addition, the deep drawing is possible with one piece of equipment and one stroke, so that it is possible to operate an unmanned automated factory in a small factory, thereby contributing to industrial development.

In addition, it is possible to minimize the capital investment, but to maximize the productivity by enabling the molding up to the fourth round.

Claims (6)

In the drawing process to be molded by the lowering of the press, The drawing process comprises: a blanking step of shearing to take out a circle to facilitate molding of a metal material having a predetermined standard; A primary drawing step of supporting the edge of the circular metal material obtained in the blanking step and drawing it to protrude upward; A second drawing step of reverse drawing an upper portion of the metal material oriented in the first drawing step in the shape of an upper punch; A third drawing step of reverse drawing again on the bottom of the metal material on which the reverse drawing is completed in the second drawing step; And a trimming step of cutting and finishing the non-trivial portion of the lower end of the metal material in which the tertiary drawing is completed. The method of claim 1, When the secondary drawing step is completed, by adjusting the length of the metal material increased by the elongation, the intermediate trimming step of shearing to facilitate the molding of the next process further comprises a drawing capable of forming in multiple stages in a single stroke Molding method. In the drawing mold apparatus provided between the upper holder which is lowered by the hydraulic cylinder provided on the top of the known hydraulic press, and the lower holder provided on the lower end of the upper holder is engaged with each other to form a common metal material into a predetermined shape. In The mold apparatus includes an upper holder which is lowered by a hydraulic cylinder, an upper die which is mounted below the upper holder, and a center of the upper die, which is simultaneously lowered by the lowering of the upper holder and formed to have a predetermined time difference. An upper mold composed of an upper punch; A blanking die provided on an upper portion of a lower holder provided at a lower end of the upper holder, intersecting with a blanking portion formed at a lower end of the upper die, and shearing a metal material in a circular shape; A support for raising and lowering by the second die cushion provided on the lower side of the hydraulic press and the first drawing, and the inside of the support for primary drawing, the lowering of the support by the outer step formed on the outer periphery The first fixture is to limit the height, and provided on the inside of the first fixture, to be moved up and down by a second die cushion, and the rising height by the inner step formed inside the first fixture is limited and secondary drawing And a pad provided inside the pad so as to be three-dimensionally drawn by the upper punch, but a lower portion of the metallic material is completed. Drawing mold apparatus capable of forming in multiple strokes in one stroke, characterized in that it comprises a lower mold consisting of a second fixture having a trimming die to shear the bottom of the. The method of claim 3, wherein The upper punch is a multi-stage in one stroke characterized in that it further comprises a trimming step to be in contact with the round portion formed inside the first fixture by controlling the length of the metal material increased by the elongation in the secondary drawing process Drawing mold apparatus that can be molded by The method of claim 3, wherein The inside of the upper punch is provided with a third cylinder is a drawing mold apparatus capable of forming in multiple stages in one stroke, characterized in that the fourth stage or the drawing processing can be additionally added to the upper portion of the metal material is completed the third drawing. The method of claim 3, wherein The mold apparatus is a drawing mold apparatus capable of forming in multiple stages in one stroke, characterized in that the multi-step molding is possible by one descent of the upper mold.