JPH0587341B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Application Field The present invention provides a workpiece having an upper plate portion and a side plate portion bent downward from the edge of the upper plate portion. A mold device for performing drawing processing to form a concave portion concave toward the side plate portion, and bending processing to form a bent portion bent inward at the lower end of the side plate portion. Regarding.

(2) Conventional technology Conventionally, when drawing and bending the above-mentioned workpiece, it is common to first bend the lower end of the side plate of the workpiece, and then draw the side plate. be.

(3) Problems to be Solved by the Invention According to the above-mentioned conventional technology, the bending process and the drawing process had to be performed in two stages, and two types of molds were required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mold device that can mold a recessed portion and a bent portion in one step.

B. Structure of the Invention (1) Means for Solving Problems The mold device of the present invention has a support surface on the upper surface on which a portion near the edge of the upper plate of the workpiece is placed, and
It has a drawing die part and a bending die part for forming a concave part and a bent part, and it is possible to move the concave part and the bent part toward and away from the inner surface of the side plate part of the workpiece on the support surface, and it is a fixed base. A die supported on a table; disposed outside the side plate of the workpiece on the supporting surface so as to be able to move toward and away from the side plate, and working together with the bending die to bend the lower end of the side plate. a bending punch for bending; an elevating body that can be raised and lowered above the workpiece on a support surface; a lifting body that is supported by the elevating body so as to be vertically movable relative to the workpiece and elastically biased downward; a pressing pad that works together to pinch the upper plate; a swing pad that is swingable and supported by the pressing pad so as to work together with the die to pinch the side plate; a swing pad that works together with the drawing die part of the die; a swing punch which is swingable and supported by a pressing pad in order to form a concave portion; in accordance with the descent of the elevating body, the die approaches the side plate portion, the swing pad approaches the side plate portion and rotates;
and a drive cam mechanism for sequentially rotating the swing punch toward the side plate portion and moving the bend punch toward the side plate portion.

(2) Action When the workpiece is placed on the supporting surface of the die and the elevating body is lowered, the die first moves its drawing die portion and bending die portion to a fixed position in the direction of approaching the side plate portion, and then the pressing pad The workpiece was brought into pressure contact with the support surface, and then the swing pad rotated and the side plate of the workpiece was held between the die and the swing pad, and further, as the swing punch rotated, a recess was formed between the drawing die part and the swing punch. After that, the bend punch moves and a bent portion is formed by the bending die portion and the bend punch.

(3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, in FIGS. 1, 2, and 3, the workpiece W is formed by processing and forming a thin steel plate in advance. It has an upper plate part 1 and a side plate part 2 bent downward from the edge of the upper plate part 1. The side plate portion 2 of this workpiece W is subjected to drawing and bending by the mold apparatus of the present invention. That is, a recess 3 is formed in the side plate 2 of the workpiece W by drawing, and a bent part 4 is formed at the lower end of the side plate 2 by bending.

This mold device includes a die 6 that is slidable on a fixed base 5, a bend punch 7 that cooperates with the die 6 to perform bending, and an upper part of a workpiece W placed on the die 6. An elevating body 8 that is driven up and down by a drive means (not shown), a pressing pad 9 that is supported by the elevating body 8 so as to be relatively movable up and down, and a swing pad 1 that is swingably supported by the pressing pad 9.
0, a swing punch 11 that is swingable around the same axis as the swing pad 10 and supported by the press pad 9, and a drive cam mechanism 12 for driving the die 6, the bend punch 7, the swing pad 10, and the swing punch 11. Equipped with.

A mounting table 14 is provided on the base 5 and has a mounting surface 13 on the upper surface for placing a portion of the workpiece W that is spaced apart from the side plate section 2 of the upper plate section 1 .

Further, on the base 5, there are
A movable plate 15 is slidably disposed to enable separation, and a die 6 extending upward is integrally provided at the end of the movable plate 15 on the mounting table 14 side. A support surface 16 is provided on the upper surface of the die 6 on which the upper plate portion 1 is placed and supported near the edge of the workpiece W. On the side of the die 6 opposite to the mounting table 14, there is a bending die part 17 for forming the bent part 4 in cooperation with the bend punch 7, and a recess part 3 in cooperation with the swing punch 11. A drawing die portion 18 is provided for forming a drawing die. Moreover, the mounting table 1
When the workpiece W is placed at a fixed position on the mounting surface 13 and the support surface 16 with the die 6 in contact with the side plate portion 2 of the workpiece W and the bending die portion 17
The dimensions along the sliding direction of the die 6 (the left-right direction in FIG. 1) are determined so that there is a gap between the die 6 and the drawing die portion 18.

A protrusion 19 is provided at the end of the base 5,
A spring 20 is compressed between the protrusion 19 and the movable plate 15. As a result, the movable plate 15, that is, the die 6, is resiliently biased in a direction closer to the mounting table 14.

The bend punch 7 is disposed on the movable plate 15 outside the side plate portion 2 of the workpiece W placed on the support surface 16 so as to be movable relative to the moving plate 15 in the sliding direction. Moreover, a spring 21 is provided between the bend punch 7 and the die 6, and the bend punch 7 and the die 6 are resiliently biased in a direction away from each other. Further, a stopper 22 for restricting the movement of the bend punch 7 by the spring 21 is provided protrudingly on the movable plate 15 .

The press pad 9 holds the workpiece W by sandwiching a portion near the edge of the upper plate portion 1 between it and the support surface 16 of the die 6.
It is resiliently biased downward by a spring 47 interposed between the elevating body 8 and the elevating body 8.

Referring also to FIG. 4, the pressing pad 9 includes:
A swing pad 10 that cooperates with the die 6 to pinch the side plate portion 2 of the workpiece W, and a drawing die portion 1
A swing punch 11 for forming the recess 3 in cooperation with the die 6 and the bend punch 7
It is swingably supported by a support shaft 23 that is perpendicular to the direction of movement of.

That is, the base ends of a pair of swing arms 24 are pivotally supported on the support shaft 23 at intervals in the axial direction, and the swing punch 11 is commonly provided at the tips of these swing arms 24. Further, the base end of a swing arm 25 is pivotally supported on a support shaft 23 between both swing arms 24, and a swing pad 10 is provided at the tip of this swing arm 25. Moreover, the swing arm 25 has a protrusion 26 located between both swing arms 24.
is installed protrudingly. Further, each swing arm 24, 25 is resiliently biased counterclockwise in FIG. 1 by a spring (not shown).

The drive cam mechanism 12 includes a movable plate 1 integrated with the die 6.
5, a second pressure receiving surface 28 provided on the bend punch 7, a third pressure receiving surface 29 provided on the swing pad 10, a fourth pressure receiving surface 30 provided on the swing punch 11, and a second pressure receiving surface 28 provided on the bend punch 7. 1, second, third and fourth pressure receiving surfaces 27, 28, 2
The first, second, third and fourth pressing surfaces 31, 3 are arranged on the elevating body 8 to abut on the first, second, third and fourth pressing surfaces 31, 30, respectively.
2, 33, and 34.

A support protrusion 35 is provided on the movable plate 15 at the end opposite to the die 6 so as to protrude upward, and a pressure receiving member 36 fixed to the bend punch 7 side of the support protrusion 35 is provided with a first support protrusion 35 . A pressure receiving surface 27 is provided. Moreover, the first pressure receiving surface 27 is formed to be inclined so as to approach the bend punch 7 as it goes downward.

The second pressure receiving surface 28 is provided on the bend punch 7 on the opposite side of the die 6, and is similar to the first pressure receiving surface 28.
It is formed to be inclined downward toward the 7 side.

The third pressure receiving surface 29 is provided on a pressure receiving member 37 fixed to the tip of the protrusion 26 integral with the swing pad 10. That is, the third pressure receiving surface 29 is provided on the opposite side of the pressure receiving member 37 from the swing pad 10, and is formed to be inclined outward as it goes downward.

The fourth pressure receiving surface 30 is provided on a pair of pressure receiving members 38 fixed to the swing punch 11, respectively.
That is, each pressure receiving member 38 is fixed to the swing punch 11 at a position corresponding to the tip of the swing arm 24, and is inclined outwardly as it goes downward on the opposite side to the swing punch 11. A pressure receiving surface 30 is formed on each pressure receiving member 38 .

Referring also to FIG. 5, swing pad 10
A cam block 39 is fixed to the lower end of the elevating body 8 on the outer side of the swing punch 11, and the cam block 39 is provided with a second pressing surface 32 that is inclined in correspondence with the second pressure receiving surface 28. Also,
A pressing member 40 is fixed to the outer lower part of the cam block 39, and a first pressing surface 31 that is inclined in correspondence with the first pressure receiving surface 27 is formed on this pressing member 40.

Between the cam block 39 and the elevating body 8, there is a movable piece 41 that is allowed to move toward and away from the pressure receiving member 37 within a regulated range, and a movable piece 41 that is allowed to move toward and away from the pressure receiving member 38 within a regulated range. A permitted moving piece 42 is supported, and each moving piece 41, 42 is connected to the elevating body 8 and the cam block 39.
The elastic bodies 43 and 44 interposed between the pressure receiving members 37 and 38 are biased toward the pressure receiving members 37 and 38.

A pressing member 45 has a third pressing surface 33 inclined in correspondence with the third pressure receiving surface 29 at the tip of the moving piece 41.
is fixed. Furthermore, a fourth
A pair of pressing members 46 each having a fourth pressing surface 34 inclined corresponding to the pressure receiving surface 30 is fixed.

While the elevating body 8 is rising, the third pressure receiving surface 2
9 is in contact with the third pressing surface 33, and the fourth pressure receiving surface 34 is in contact with the fourth pressing surface 34.

When the elevating body 8 descends, the first pressing surface 31
While contacting the pressure receiving surface 27, the second pressing surface 32
contacts the second pressure receiving surface 28, the movable plate 15, that is, the die 6 slides on the base 5 against the spring force of the spring 20, and the bend punch 7 resists the spring force of the spring 21 to move the movable plate 15, the die 6 is set to slide to a predetermined position prior to the bend punch 7 to a bending position.

In addition, as the elevating body 8 descends, the third pressing surface 3
3 presses the third pressure receiving surface 29 while compressing the elastic body 43 to swing the swing pad 10;
The pressing surface 34 presses the fourth pressure receiving surface 30 while compressing the elastic body 44 to swing the swing punch 11, but the bending process of the bend punch 7 is performed only after the die 6 has slid to a predetermined position. Before sliding to the position, the swing pad 10 is set to swing to a position where the side plate portion 2 of the workpiece W is pressed between it and the die 6, and then the swing punch 11 is set to swing to the drawing position.

Next, the action of this embodiment will be explained with reference to FIG. Punch 7 is spring 2
It is separated from the die 6 until it comes into contact with the stopper 22 due to the spring force of 1. Also, swing pad 1
0 and the swing punch 11 are in an upwardly rotated position as shown in FIG.

In this state, the workpiece W is placed on the mounting surface 13 and the support surface 16 so that the side plate portion 2 of the workpiece W is located between the die 6 and the bend punch 7,
The elevating body 8 is lowered.

As the elevating body 8 descends, the first and second pressing surfaces 31 and 32 move toward the first and second pressure receiving surfaces 27 and 28.
The moving plate 15 and the die 6 approach the side plate portion 2 of the workpiece W from the inside against the spring force of the spring 20, and the bend punch 7 resists the spring force of the spring 21 and approaches the workpiece W. However, the die 6 first moves to a predetermined position where it contacts the side plate 2, and the bend punch 7 moves slowly.

When the elevating body 8 further descends, the pressing pad 9 comes into contact with the workpiece W, the workpiece W is pressed between the support surface 16 and the pressing pad 9, and the workpiece W is positioned. Moreover, despite the descent of the elevating body 8,
Since the pressure pad 9 is prevented from descending, the third and fourth pressure receiving surfaces 29 and 30 move toward the third and fourth pressure surfaces 33 and 34 as the elevating body 8 descends.
, the swing pad 10 and the swing punch 11 start to swing toward the side plate 2, and the swing pad 10 first comes into contact with the side plate 2, and the side plate 2 is held between the die 6 and the swing pad 10. Next, the swing pad 11 cooperates with the drawing die part 18 of the die 6 to draw the side plate 2, and the recess 3 is formed in the side plate 2.

Thereafter, as the elevating body 8 further descends, the bending punch 7 moves into the bending die portion 1 of the die 6.
7 to perform the bending process, and the bent portion 4 is formed at the lower end of the side plate portion 2.

In this way, the drawing process and the bending process of the workpiece W are performed in one process, which requires only one lowering of the elevating body 8. Furthermore, since the drawing process is performed using the swing punch 11 and the drawing die part 17 prior to the bending process, the bending process of the side plate part 2 is performed while the side plate part 2 is held between the die 6, the swing pad 10, and the swing punch 11. This improves the formability of the bending process.

C. Effects of the Invention As described above, the device of the present invention has a support surface on the upper surface on which a portion near the edge of the upper plate portion of the workpiece is placed, and a drawing die portion for forming the recessed portion and the bent portion. A die having a bending die portion and supported on a fixed base so that the recessed portion and the bent portion can move toward and away from the inner surface of the side plate portion of the workpiece on the support surface; a bend punch, which is disposed outside the side plate so as to be able to move toward and away from the side plate, and works with the bending die to bend the lower end of the side plate; an elevating body that can be raised and lowered upward; a pressing pad that is supported by the elevating body so as to be vertically movable and elastically biased downward, and that cooperates with the support surface to pinch the upper plate portion; a swing pad that is swingable to cooperate with the die to pinch the side plate portion and supported by the press pad; a press pad that is swingable to cooperate with the drawing die portion of the die to form a recess; As the elevating body descends, the swing punch rotates close to the side plate of the die, rotates the swing pad close to the side plate, rotates the swing punch close to the side plate, and rotates the bend punch close to the side plate. Since it is equipped with a drive cam mechanism that sequentially moves close to the side plate part, it has become possible to perform drawing and bending on a workpiece in one process of lowering the elevating body once. Moreover, since the bending process is performed with the bend punch while the side plate portion of the workpiece is held down with the swing punch, the formability of the bending process is improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional side view showing the state before the start of processing, FIG. 2 is an enlarged longitudinal sectional view of the workpiece showing the state after processing, and FIG.
The figure corresponds to the arrow view in Figure 2, Figure 4 corresponds to the arrow view in Figure 1, Figure 5 corresponds to the arrow view in Figure 1, and Figure 6 corresponds to Figure 1 showing the state after processing is completed. FIG. 1... Upper plate part, 2... Side plate part, 3... Recessed part, 4
...Bending portion, 5...Base, 6...Die, 7...Bend punch, 8...Elevating body, 9...Press pad,
10... Swing pad, 11... Swing punch, 12... Drive cam mechanism, 16... Support surface, 1
7...Die part for bending, 18...Die part for drawing, W...Work.

Claims (1)

[Claims] 1. On a workpiece having an upper plate part and a side plate part bent downward from the edge of the upper plate part, a drawing process is performed to form an inwardly recessed part in the side plate part, and a drawing process that forms an inwardly recessed part in the side plate part, and A mold device for performing a bending process to form a bent portion at the lower end of the side plate portion, which has a support surface on the upper surface on which a portion near the edge of the upper plate portion of the workpiece is placed, and a recessed portion and It has a drawing die part and a bending die part for forming a bent part, and is mounted on a fixed base so that the recessed part and the bent part can be moved toward and away from the inner surface of the side plate part of the workpiece on the support surface. A die supported on the support surface; arranged so as to be able to move toward and away from the side plate of the workpiece on the support surface, and work together with the bending die to bend the lower end of the side plate. a bending punch for moving the workpiece on the support surface; an elevating body that can be raised and lowered above the workpiece on the support surface; supported by the elevating body so as to be vertically movable and elastically biased downward; a pressing pad that presses the upper plate part; a swing pad that is swingable and supported by the pressing pad so as to work together with the die to pinch the side plate part; a swing pad that works together with the drawing die part of the die; A swing punch that is swingable and supported by a pressing pad to form a concave part; as the elevating body descends, the die moves close to the side plate, the swing pad rotates close to the side plate, and the swing punch and a drive cam mechanism for sequentially rotating the bend punch toward the side plate and moving the bend punch toward the side plate.