JP2000233234A - Air cushion linked die device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a small sizes press device low in die height by using an air cushion only so as to obtain smooth and large working force in a compact size when a large cushion stroke of an upper die of a press die is required or when plural processes are done by a single die. SOLUTION: An upper die 2 of an air cushion linked drawing, trimming, piercing type has a trimming punch 5 and a combined presser/drawing die 6, an up/down moving block A9 is fitted in the trimming punch and a left/right moving block B10 is fitted between the moving block A9 and the drawing die 6. The upper die is provided with a piercing punch 7 fixed to an upper face plate 4 the same as the trimming punch. A lower die 3 has a drawing punch 13 fixed to a lower face plate 11 and a blank holder 12 supported by a cushion pin 15 to which air force is applied from below is arranged on its outer periphery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cushion interlocking mold apparatus generally used for press working.

[0002]

2. Description of the Related Art When performing press working on a sheet material or the like, conventional processing techniques include, for example, a die apparatus for individual processing such as punching or bending, which is provided with components such as a coil spring and a gas spring. Gaining power. For processing requiring a large force such as drawing, an air cushion is used only in the lower mold. The same can be said for a case where a plurality of machining processes are simultaneously performed by a single mold. For example, in the case of a mold apparatus in which drawing (drawing) and trimming (edge cutting) are simultaneously performed by a single mold, conventionally, an upper mold has a coil spring, a lower mold has a gas spring, and a lower mold. Is processed by the power of each of the upper and lower dies while utilizing the power of the air cushion. (For example, 10-1
No. 92998).

[0003]

In such a conventional mold apparatus, a long coil spring or gas spring is required when a vertical movement stroke of a processing member to be processed is required to be large. Therefore, the die height of the die (the height of the die device at the bottom dead center of the press) is required to be high, and a large-sized press device is required.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to apply only the force applied to the upper and lower molds of the mold apparatus by using parts to the air cushion under the press only. By using and transmitting the force to the upper mold, the movement of the upper mold and the lower mold is made smooth, a large machining force is obtained, and multiple machining processes can be performed with a single mold device, and An object of the present invention is to provide a mold device capable of using a small press device. This is intended to reduce costs.

[0005]

According to a first aspect of the present invention, there is provided a mold apparatus for processing a plate material placed on a lower mold when the upper mold reciprocates with respect to the lower mold. The force of the air sent from the compressor to the air tank under the press is transmitted to the upper mold via cushion pins. And
According to the principle of the cam, the upper and lower forces are temporarily changed to the left and right forces, and are transmitted to the upper presser or the like via a block for changing the upper and lower forces again. The transmitted large force is used as cushion pressure to process the workpiece. By providing such a drive mechanism, the above-mentioned problem is solved, and a mold device with a smoother upper and lower mold mutual movement is achieved, and multiple processing can be performed more smoothly with a single mold. It is also possible to do. Then, a small press device can be used, which leads to cost reduction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the structure and operation and effect of the present invention have general versatility with respect to press working techniques, and can be applied to working techniques for arbitrary materials. The processing steps to be applied can cover substantially all processing steps such as punching, bending, and drawing.

One embodiment of the present invention is
As an example, an air cushion interlocking type drawing & trimming & piercing type will be described below. The following description is a description of a die apparatus that performs drawing (drawing), trimming (edge cutting), and piercing (drilling) with a single die apparatus, and is a main application example of the present invention. However, this is merely an example, and does not limit the technical scope of the present invention. 1 to 5 show an embodiment of the present invention. FIG. 1 is a cross-sectional view of a mold apparatus 1 used in the embodiment, and FIGS. 1 to 5 are cross-sectional views showing a plurality of advance stages of an upper mold 2 of a mold apparatus 1 with respect to a lower mold 3. FIGS. 6 to 9 show three more specific perspective views of the mold apparatus 1 for the moment.

[0008] In the following, in the embodiment, the drawing mechanism (drawing), trimming processing (edge cutting), and piercing processing (drilling) are performed by the aforementioned driving mechanism.
An example in which one processing step is processed by a single die apparatus will be described, but the die apparatus of the present invention is not limited to this example. An object of the present invention is to realize a mold device that can be executed in any process. The essence of the invention for achieving the object is to provide a driving mechanism for transmitting a single force, an air cushion from below, thereby performing various processes in a single mold apparatus. is there. Obviously, the present invention includes various embodiments derived from the essence of the present invention.
Note that, in the following description, the names of the respective parts adopt those in the related art.

[0009]

In this embodiment, the upper mold 2 of the mold apparatus 1 is
Is divided into five partial strokes. The first partial stroke is a period from the state where the upper die 2 is at the top dead center as shown in FIG. 1 to the time when the movable block A9 contacts the lower die blank holder 12 as shown in FIG. The second partial stroke is a period from the state of FIG. 2 until the trim punch 5 contacts the blank holder 12 as shown in FIG. The third partial stroke is a period from the state of FIG. 3 to the end of drawing (drawing) as shown in FIG. The fourth partial stroke is a period from the state in FIG. 4 to the end of the trimming processing (edge cutting) and the piercing processing (drilling) as shown in FIG. The fifth partial stroke is a period from the state in FIG. 5 until the upper die 2 returns to the top dead center.

The mold apparatus 1 of this embodiment realizes a drawing step (drawing), a trimming step (edge cutting) and a piercing step (drilling) in a single step. It has. The upper mold 2 is a trim member 5 fixed to the upper surface plate 4 and used in the fourth partial stroke, and a trim member 5 similarly fixed to the upper surface plate 4 by a retainer 8 and used in the fourth partial stroke. It has a piercing punch 7, a draw die 6 which is a processing member used in the third partial stroke and also has a role of a presser (plate material holder), and a cam mechanism (changing the vertical force left and right and the left and right force up and down). A movable block A9 and a movable block B10 are provided.

On the lower surface of the draw die 6, a concave processing surface corresponding to a three-dimensional shape and a flange (collar) on the outer peripheral portion are provided.
Is formed, a flat surface is formed around the processing surface. Further, an edge 17 which is an end of the lower surface of the trim punch 5 on the draw die 6 side is a cutting blade formed so as to be able to cut a processing material such as a metal plate, and the upper die 2 is in a raised state. In this case, the lower surface of the draw die 6 is arranged at the same position in the vertical direction as the flat surface on the lower surface of the draw die 6 or above the same position. The lower surface of the piercing punch 7 is the same as the piercing punch 7 on the processing surface of the lower surface of the draw die 6.
Are arranged above the same position in the vertical direction with respect to the surface of the part around the.

The lower mold 3 is fixed to the lower plate 11,
It has a draw punch 13 which is a processing member used in the third partial stroke. In the draw punch 13, the fourth
A button die 14, which is a processing member used in a partial stroke, is fitted therein. On the upper surface of the draw punch 13 including the button die 14, a convex processed surface having a shape corresponding to the processed surface of the draw die 6 is formed, and a flat surface is formed surrounding the convex processed surface. An edge 18 of the outer peripheral edge of the flat surface becomes a cutting blade, and the plate material 16 which is a processing material is sandwiched between the edge 18 of the trim punch 5 and the plate material is cut. A blank is supported on the outer periphery of the draw punch 13 by a cushion pin 15 from an air cushion under the press, and is used to sandwich a plate material 16 which is a processing material between the draw punch 13 and the upper trim punch 5 in the second partial stroke. A holder 12 is provided. 1, the upper surface of the blank holder 12 is arranged at the same position as the highest part of the processing surface of the draw punch 13 or above the same position. When the upper die 2 moves down, the trim punch 5 is used to hold the blank holder 1.
2 and is pushed down together with the blank holder 12.

Hereinafter, the operation of the mold apparatus 1 will be described with reference to FIGS. In this embodiment, the upper mold 2
Divides one stroke of reciprocating movement with respect to the lower mold 3 into five partial strokes. The first partial stroke is a period from the state where the upper die 2 is at the top dead center as shown in FIG. 1 to the time when the movable block A9 contacts the lower die blank holder 12 as shown in FIG. The second partial stroke is a period from the state of FIG. 2 until the trim punch 5 contacts the blank holder 12 as shown in FIG. The third partial stroke is a period from the state of FIG. 3 to the end of drawing (drawing) as shown in FIG. The fourth partial stroke is a period from the state in FIG. 4 to the end of the trimming processing (edge cutting) and the piercing processing (drilling) as shown in FIG. The fifth partial stroke is a period from the state in FIG. 5 until the upper die 2 returns to the top dead center.

(First Partial Stroke) In FIG. 1, the upper mold 2 of the mold apparatus 1 is at the top dead center. In the state of FIG. 2 in which the flat material 16 is placed on the lower die 3 and the upper die 2 is slightly lowered on the lower die 3, the movable block A9 is in contact with the lower die blank holder 12.

(Second Partial Stroke) When the upper mold 2 further descends with respect to the lower mold 3, as shown in FIG. 3, the movable block A9 is pushed up by a blank holder 12 by a force from below, and the trim punch 5 Abuts on the blank holder 12. The movable block A9 hits the movable block B10, and the movable block B10 moves inward.
Is in contact with

(Third Partial Stroke) When the upper mold 2 further descends with respect to the lower mold 3, the trim punch 5 pushes down the blank holder 12 together with the cushion pin 15, as shown in FIG. The plate 16 is pressed into a predetermined three-dimensional shape with the punch 13. The pressure of the air cushion from below is applied to the draw die 6 via the cushion pin 15, the blank holder 12, the movable block A9, and the movable block B10.
At this time, the outer peripheral portion serving as the flange portion of the product is sandwiched between the flat surface of the draw die 6 and the flat surface of the draw punch 13,
A portion further outside the outer peripheral portion is sandwiched between a lower end surface of the trim punch 5 and an upper end surface of the blank holder 12.

(Fourth Part Stroke) When the upper die 2 further descends with respect to the lower die 3, the draw die 6 cannot be lowered further from the state of FIG. 4, so that, as shown in FIG.
The trim punch 5 is lowered below the draw die 6, and its cutting edge (edge) 17 and the drawing punch 13 (edge)
Then, the plate 16 is cut between the first and second plates 18. At the same time, the piercing punch 7 is lowered by the same amount as the trim punch 5, and a hole is made in the plate 16 between the piercing punch 7 and the cutting edge of the button die 14. The timing at which the cutting is completed is the bottom dead center of the upper die 2. The movable block B10 lowers the sliding surface with the draw die 6 obliquely downward, and the draw die 6 can no longer be lowered.
Move to a position where it contacts the collar. At that time, the movable block B10 moves the movable block A9 downward, and further pushes down the blank holder 12 together with the cushion pin 15, so that the pressure of the air cushion from below is applied to the cushion pin 15, the blank holder 12, and the movable block A.
9. The movable die B is placed on the draw die 6 via the movable block B10, and the draw die 6 functions as a presser.

(Fifth partial stroke) When the trimming (edge cutting) and piercing (piercing) are completed, the upper mold 2 moves upward and returns to the state shown in FIG.

As described above, in the present embodiment, drawing (drawing), trimming (edge cutting), and piercing (drilling) are performed in a single mold apparatus.
This is done using only the power of the air cushion.

(Effects of Embodiment) Accordingly, in the prior art, a plurality of processing steps which have been performed in a complicated manner by using components such as a coil spring and a gas spring are integrated into a single apparatus. With a mold device, it can be performed more smoothly and more compactly.

Even when a large cushion stroke is required for the upper die, the die die height (the height of the die at the bottom dead center of the press) is low because long coil springs and gas springs are not used. Since the product can be suppressed and a product can be processed using a small press device, a significant cost reduction can be achieved.

Further, as is clear from the description of the respective effects, the effects realized in the present embodiment are effects that can be realized with respect to press working in general. That is, the shape of the processing surface of the draw die 6 of the mold apparatus 1 and the shape of the draw punch 12
Various products can also be manufactured by changing the shape or the like of the machined surface to another shape. Further, the present invention is not limited to the processing steps as in the above-described embodiment, and this method can be used for other bending and the like, and is included as an embodiment of the present invention. In such a case, it is clear that the above effects can be realized.

[0023]

By using the mold apparatus of the present invention,
The following effects can be obtained. According to the first aspect of the present invention, when the upper die reciprocates with respect to the lower die, the lower die is processed. The stroke in which the upper mold reciprocates with respect to the lower mold is divided into a plurality of partial strokes. In at least a part of the plurality of partial strokes, a plurality of processing members each performing a processing process on the plate material at a predetermined operation position corresponding to each of the at least one partial stroke. Is provided. A plurality of driving members provided in the mold apparatus and a driving member each having a cam mechanism and being movable, make the plate member or each processing member relatively approach at a position during the stroke corresponding to the start of each of the partial strokes. Then, each processing member is caused to perform a processing operation on the plate material at the operation position.

Thus, a plurality of processing steps can be incorporated in one reciprocating stroke of a single mold by utilizing only the pressure of the air cushion under the press. Therefore, as compared with the conventional method, the processing steps can be performed more smoothly and more compactly, and the number of dies required for manufacturing can be reduced, and the number of manufacturing steps can be reduced.

Also, since the die height of the mold can be kept low, the product can be processed using a small press machine, which leads to a significant cost reduction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a mold apparatus 1 used in an embodiment at the start of a first partial stroke.

FIG. 2 is a cross-sectional view of the mold apparatus 1 used in the embodiment at the start of a second partial stroke.

FIG. 3 is a cross-sectional view of the mold apparatus 1 used in the example at the start of a third partial stroke.

FIG. 4 is a cross-sectional view of the mold apparatus 1 used in the example at the start of a fourth partial stroke.

FIG. 5 is a cross-sectional view of the mold apparatus 1 used in the example at the start of a fifth partial stroke.

FIG. 6 is a lower mold plan view of a concrete mold drawing (three views based on trigonometry) of the mold apparatus 1 used in the embodiment.

FIG. 7 is a top plan view of a specific mold (three views based on trigonometry) of the mold apparatus 1 used in the embodiment.

FIG. 8 is a cross-sectional view (cross-section AA) of a specific die drawing (three views based on trigonometry) of the die apparatus 1 used in the embodiment.
It is.

FIG. 9 is a cross-sectional view (cross section BB) of a specific die drawing (three-sided view based on trigonometry) of the die apparatus 1 used in the embodiment.
It is.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Die apparatus 2 Upper die 3 Lower die 4 Top plate 5 Trim punch 6 Draw die (also used as presser) 7 Via punch 8 Retainer 9 Movable block A 10 Movable block B 11 Lower plate 12 Blank holder 13 Draw punch 14 Button die 15 Cushion pin 16 Plate 17 Cutting edge (edge) of trim punch 18 Cutting edge (edge) of draw punch (also used for trim die)

Claims (1)

[Claims] 1. A press apparatus for processing a plate material placed on a lower mold when an upper mold reciprocates with respect to a lower mold in press working, wherein a force-applying component such as a spring is used. An air-cushion-linked mold device that uses only an air cushion and has a drive member to transmit the force of the air cushion from below the press to the upper mold.