JP2684048B2 - Bend mold equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention is directed to a third peripheral edge in which first and second peripheral edge portions intersecting on an extension line have a larger curvature than both peripheral edge portions. A bend die for bending the peripheral edge of a work having at least a partial peripheral edge continuous with a portion, particularly formed corresponding to the first, second and third peripheral edges of the work. The present invention relates to a bend die device including a bend die and a bend punch that cooperates with the bend die to bend the first, second, and third peripheral portions.

(2) Conventional Technology Conventionally, such a device is known from, for example, Japanese Utility Model Laid-Open No. 53-121140.

(3) Problem to be Solved by the Invention However, in the above-mentioned conventional one, the first, second and third peripheral portions are bent at once by the bend die and the bend punch. Since the middle third peripheral edge portion has a larger curvature than the intermediate peripheral edge portions, the peripheral edge portions adjacent to each other and having different curvatures (that is, the third peripheral edge portion having a large curvature are adjacent to each other).
Peripheral portion and first or second adjacent to this with a small curvature
Excessive thickness tends to concentrate in the connection part between each of the peripheral parts)
The bend line and the surface of the work will be distorted.

The present invention has been made in view of such circumstances,
The first, second and third distortions are avoided as much as possible.
An object of the present invention is to provide a bend die device capable of bending the peripheral portion.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a first and second peripheral edge portions that intersect each other on an extension line having a larger curvature than both peripheral edge portions. A bend die for bending the peripheral edge of a work having at least a partial peripheral edge continuous with the third peripheral edge, which is formed corresponding to the first, second and third peripheral edges. A bend die, a bend punch capable of bending the first, second and third peripheral portions in cooperation with the bend die, and an operation of the bend punch in association with an ascending / descending operation of an upper die capable of ascending / descending with respect to the bend die. And a cam mechanism, wherein the bend punch has a first
A first bend punch formed in a shape corresponding to an intermediate position between the peripheral edge portion and the third peripheral edge portion, and a second bend punch formed in a shape corresponding to an intermediate position between the second peripheral edge portion and the third peripheral edge portion. And a third bend punch formed in a shape corresponding to the third peripheral edge portion, and the cam mechanism operates the third bend punch in the first and second directions.
In addition to the operation of the bend punch, the first and second bend punches are operated when the third bend punch completes the operation and is separated from the bend die.

(2) Action According to the above configuration, the bending work of the third peripheral edge portion is first performed by the third bend punch and the bend die, and subsequently, the bending work from the first peripheral edge portion to the intermediate position of the third peripheral edge portion. Between the bend die and the first bend punch,
Further, since the bending work from the second peripheral edge portion to the intermediate position of the third peripheral edge portion is performed between the bend tie and the second bend punch, respectively, the connecting portion between the first and third peripheral edge portions having different curvatures, and It is possible to prevent the excess thickness from being concentrated on the connecting portion between the third and second peripheral portions.

Since the first and second bend punches are operated when the third bend punch completes its operation and is separated from the bend die, the operation of the third bend punch precedes the operation of the first and second bend punches. However, mutual interference between the first and second bend punches and the third bend punch is properly avoided.

(3) Example Hereinafter, one example of the present invention will be described with reference to the drawings. First, in FIG. 1 and FIG. 2, a bend mold device 1 is a steel plate from which an unnecessary outer peripheral edge portion is cut off after drawing. A fixed bend die 2 for mounting the work W, and a pad 3 for pressing the work W on the bend die 2.
And the first, second and third bend punches 4, 5 and 6 for bending the peripheral portion of the work W in cooperation with the bend die 2.
And The partial peripheral edge portion 7 of the work W includes first and second peripheral edge portions 8 and 9 intersecting on the extension line, and both peripheral edge portions thereof.
Curved with a curvature larger than 8, 9 and both peripheral edges
And a third peripheral edge portion 10 for connecting between 8 and 9 without a step, and bending of the first, second and third peripheral edge portions 8, 9, 10 is performed by bending the bend die 2 and the first and second edge portions. And the third bend punches 4, 5 and 6 cooperate with each other.

The bend die 2 is fixedly mounted on the fixed lower die 11, and the upper surface of the bend die 2 is formed to have a shape corresponding to the lower surface shape of the work W on which the work W is placed.
The upper peripheral edge of the bend die 2 is formed to have a shape corresponding to the peripheral edge portion 7 of the work W. Moreover, a pressure receiving surface 12 bent inward is provided on the upper peripheral edge of the bend die 2 so as to press and bend the peripheral edge portion 7 of the work W.

The pad 3 is an upper mold 13 that can be raised and lowered above the bend die 2.
In addition, it is supported to allow relative movement up and down within a limited range and is elastically urged downward,
When descending 13, the first, second and third bend punches 4,5,
Prior to bending by 6, the work W is elastically pressed and fixed on the bend die 2.

Referring also to FIG. 3, a support 21 is provided on the lower die 11 on the side of the bend die 2 corresponding to the third peripheral portion 10 of the work W.
Is fixed and the bracket 14 fixed on the support 21 presses the third peripheral edge portion 10 of the work W on the bend die 2 against the pressure receiving surface 12 (the position shown by the chain line in FIG. 2). , The third bend punch 6 is supported so as to be swingable between a position separated from the bend die 2 (position shown by a solid line in FIG. 2). That is, an intermediate bent portion of a swinging member 15 formed in a substantially L shape is swingably supported on the bracket 14 via a substantially horizontal support shaft 16, and the swinging member 15 has an upper end portion on the bend die 2 side. A third bend punch 6 capable of pressing the third peripheral edge portion 10 of the work W is fixedly mounted on the pressure receiving surface 12. Further, a pin 17 projecting to both sides is fixed near the upper part of the swing member 15 in parallel with the support shaft 16. On the other hand, a pair of support plates 18 are erected on the support base 21 on the side opposite to the bend die 2 with respect to the bracket 14 with a space therebetween, and the inner surfaces of the support plates 18 facing each other are provided. Pins 19 parallel to the pins 17 are fixed. Thus, the coil springs 20 are respectively contracted between both ends of the pin 17 and each pin 19, and the third bending punch 6 of the swing member 15 is separated from the bending die 2 by the spring force of these coil springs 20. It is urged to rotate in the direction. Further, a stopper 22 is fixedly provided on the upper surface of the support base 21 to abut the swing member 15 and regulate the maximum position of the third bend punch 6 away from the bend die 2.

Roller-shaped cam followers 25, 26 roll on the lower and upper portions of the swing member 15 on the side separated from the bend die 2 via shafts 23, 24 parallel to the support shaft 16 in contact with a drive cam 27. It is pivotally supported. The drive cam 27 is disposed in the upper mold 13 that can be moved up and down. When the upper mold 13 is moved up and down, the cam followers 25, 26 make contact with the drive cam 27 and roll, so that the swinging member 15 is supported by the support shaft 16. Swing around the axis.

The drive cam 27 is disposed below the upper die 13 so as to be able to move toward and away from the bend die 2. Ie upper mold
A pair of left and right L-shaped guide portions 28 are provided on the 13, and upper portions on both sides of the drive cam 27 are engaged with the guide portions 28 in a slidable manner. Further, on the upper part of the drive cam 27, there is provided a groove 29 which extends long along the longitudinal direction of the guide portion 28 and which is open to the end surface and the upper end surface on the bend die 2 side. The part 30 is projected from the upper mold 13. Moreover, at the end of the groove 29 opposite to the bend die 2, a guide rod 31 extending in the groove 29 toward the bend die 2 is formed.
A base end of the guide rod 31 is fixed, and a regulating flange 32 is provided at the tip of the guide rod 31. On the other hand, the guide protrusion 30 has
A through hole 33 for movably inserting the 32 is provided, and a guide plate 35 having an insertion hole 34 of a small diameter capable of preventing the movement of the regulating flange 32 is provided on the opposite side of the bend die 2 from the insertion hole 34. The guide rod is fixed so as to be coaxial with the through hole 33.
Reference numeral 31 movably penetrates through the insertion hole 34. Therefore, the movement of the drive cam 27 on the side away from the bend die 2 is restricted by the control collar 32.
Is regulated by abutting on the guide plate 35. Moreover, a coil-shaped spring 36 surrounding the guide rod 31 is contracted between the guide plate 35 and the drive cam 27, and the drive cam 27 is biased in a direction away from the bend die 2 by the spring force of the spring 36. It

On the side opposite to the swing member 15 of the drive cam 27, the shafts 23, 2
A cam follower 38 is axially supported by a shaft 37 parallel to the shaft 3, and a fixed cam 39 with which the cam follower 38 is in sliding contact is a lower mold 11.
Fixed on top. A mountain-shaped cam surface 40 protruding toward the drive cam 27 is provided on the side surface of the fixed cam 39 on the drive cam 27 side, and the cam follower 38 rolls along the cam surface 40. On the side surface of the drive cam 27 on the swinging member 15 side, there is provided a mountain-shaped cam surface 41 having a most projecting portion at a position substantially corresponding to the most projecting portion of the cam surface 40 and projecting to the swinging member 15 side. The cam followers 25 and 26 roll along the cam surface 41. As a result, when the upper die 13 moves up and down, the drive cam 27 moves up and down while moving toward and away from the bend die 2 by the cam follower 38 contacting the cam surface 40 and rolling, and the swing member 15 moves up and down. , 26 is the cam surface 4
Since it rolls by rolling along 1, the third bend punch 6 operates at double speed. Moreover, both cam surfaces
Since the most projecting portions of 40 and 41 substantially correspond to each other, when the drive cam 27 comes closest to the bend die 2, the swing member 15, that is, the third bend punch 6 swings most toward the bend die 2. become.

In FIG. 4, a movable body 42 is disposed on the lower die 11 on the side of the bend die 2 corresponding to the first peripheral edge portion 8 of the work W so that the movable body 42 can be moved toward and away from the bend die 2. A first bend punch 4 is provided on the upper end of the moving body 2. Moreover, the first bend punch 4 has the first peripheral portion 8
To the intermediate position of the third peripheral portion 10 are formed.

Further, a support plate 43 facing the moving body 42 is erected at a position near the bend die 2 on the lower mold 11, and this supporting plate 43 is moved to guide the approaching and separating operation of the moving body 42 with respect to the bend die 2. A base end of a guide rod 44 slidably fitted to the body 42 is fixedly provided. A coil-shaped spring 45 surrounding the guide rod 44 is contracted between the support plate 43 and the movable body 42, and the movable body 42, that is, the first bend punch 4 is separated from the bend die 2 by the spring force of the spring 45. Is urged to do. In addition, a stopper 46 is fixedly provided on the lower die 11 to contact the moving body 42 and regulate the maximum separation distance of the moving body 42 from the bend die 2.

On the side surface of the moving body 42 opposite to the bend die 2, a pressure receiving surface 47 inclined toward the bend die 2 side as it goes upward is provided, and a cam 49 having a pressing surface 48 corresponding to the pressure receiving surface 47 is provided above. It is provided on the mold 13 (see FIG. 2). The cam 49 descends while the pressing surface 48 slides against the pressure receiving surface 47 when the upper die 13 descends, whereby the movable body 42, that is, the first bend punch 4 resists the spring force of the spring 45. Then, the bending die 2 and the first bend punch 4 perform bending work from the intermediate position of the third peripheral edge portion 3 to the first peripheral edge portion 8.

In addition, the pressure receiving surface 47 and the pressing surface 48 are located at the third peripheral edge portion 10 by the third bending punch 6 approaching the bending die 2 in cooperation with the bending die 2 due to the double speed action of the drive cam 27.
The work W is formed so as not to reach the work W until the bending process is completed.

The second bend punch 5 is driven to the bend die 2 side by the basically same configuration as the first bend punch 4, and the description of the structure thereof will be omitted, but like the first bend punch 4, The bending of the third peripheral edge portion 10 by the cooperation of the third bend punch 6 and the bend die 2 is set to be performed prior to the bending by the cooperation of the second bend punch 5 and the bend die 2. It Further, the second bend punch 5 includes the second peripheral portion 9 to the third peripheral portion.
It is formed in a shape corresponding to 10 intermediate positions.

Thus, the drive cam 27, the fixed cam 39, the cam follower 2
5, 26, 38, the pressure receiving surface 47 of the movable body 42 and the cam 49 cause the operation of the third bend punch 6 to precede the operation of the first and second bend punches 4 and 5, and The cam mechanism D of the present invention that operates the first and second bend punches 4 and 5 when the operation is completed and the bend die 2 is separated from the bend die 2.
Is composed.

Explaining the operation of this embodiment, the work W to be machined is placed on the bend die 2 while the upper die 13 is raised, and the upper die 13 is lowered. Then, the pad 3 first presses and fixes the work W on the bend die 2, and then the double speed action of the drive cam 27 causes the swing member 15 to move.
That is, the third bend punch 6 swings toward the bend die 2, and the third peripheral edge portion 10 of the work W is pressed against the pressure receiving surface 12 by the cooperative action of the third bend punch 6 and the bend die 2. Is bent.

At this time, the first and second bend punches 4 and 5 are in the process of moving closer to the bend die 2 and the most protruding portion of the cam surface 41 of the drive cam 27 has passed over the cam follower 26 and the third bend has been completed. When the punch 6 is separated from the bend die 2, the first and second bend punches 4 and 5 are operated,
That is, the work W is clamped between the punches 4, 5 and the bend die 2 to perform bending work. In this way, the first and second bend punches 4, 4 from the intermediate position of the third peripheral edge portion 10 to the first peripheral edge portion 8 and the intermediate position of the third peripheral edge portion 10 to the second peripheral edge portion 9 which are already bent. Bending is performed by cooperation with 5 and the bend die 2.

In this way, the bending of the third peripheral edge portion 10 which is intermediate between the first and second peripheral edge portions 8 and 9 and has a relatively large curvature is preceded by
After that, the bending work from the first peripheral edge portion 8 to the intermediate position of the third peripheral edge portion 10 and from the second peripheral edge portion 9 to the intermediate position of the third peripheral edge portion 10 is continued. It is possible to prevent the excess thickness from being concentrated on the connecting portion between the third peripheral edge portions 8 and 10 and the connecting portion between the second and third peripheral edge portions 9 and 10 as much as possible, and suppress the occurrence of distortion in these connecting portions. .

C. Effects of the Invention As described above, according to the present invention, the bend punch is the first
A first bend punch corresponding to the intermediate position of the peripheral edge portion to the third peripheral edge portion, a second bend punch corresponding to the intermediate position of the second peripheral edge portion to the intermediate position of the third peripheral edge portion, and a first bend punch corresponding to the third peripheral edge portion. The third bend punch is made to precede the operation of the first and second bend punches. Therefore, the third bend punch has a relatively large curvature in the middle of the first and second peripheral portions. Bending of the third peripheral edge portion is first performed between the third bend punch and the bend die, followed by bending from the first peripheral edge portion to the intermediate position of the third peripheral edge portion and the second peripheral edge portion. Bending of the third peripheral edge portion to the intermediate position is performed between the bend die and the first and second bend punches, respectively, so that the connecting portion of the first and third peripheral edge portions having different curvatures and the second and third peripheral edge portions are joined together. and It is possible to prevent the excess thickness from concentrating on the connecting portions between the third peripheral portions, and it is possible to effectively prevent the occurrence of distortion in these connecting portions.

Moreover, since the first and second bend punches are operated when the third bend punch completes its operation and is separated from the bend die, the operation of the third bend punch precedes the operation of the first and second bend punches. Nevertheless, it is possible to easily avoid that the first and second bend punches interfere with the third bend punch.

[Brief description of the drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a cross-sectional plan view, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. 4 and FIG. 4 are sectional views taken along the line IV-IV in FIG. 1 ... Bending die device, 2 ... Bending die, 4 ... 1st
Bend punch, 5 ... Second bend punch, 6 ... Third bend punch, 7 ... Edge portion, 8 ... First edge portion, 9 ...
… Second peripheral part, 10 …… Third peripheral part, 13 …… Upper mold, D
…… Cam mechanism, W …… Work

Claims (1)

(57) [Claims] 1. The first and second peripheral portions (8, 9) intersecting on an extension line are continuous via a third peripheral portion (10) having a curvature larger than that of both the peripheral portions (8, 9). A bend die for bending the peripheral edge portion (7) of a work (W) having at least a peripheral edge portion (7), wherein the first, second and third peripheral edge portions (8-10) are provided. The corresponding bend die (2) and this bend die (2)
A bend punch (4 to 6) capable of bending the first, second and third peripheral portions (8 to 10) in cooperation with the upper die (13) capable of moving up and down with respect to the bend die (2). A cam mechanism (D) that operates the bend punches (4 to 6) in conjunction with the lifting operation.
The bend punch comprises a first bend punch (4) formed in a shape corresponding to an intermediate position between the first peripheral edge portion (8) and the third peripheral edge portion (10), and a second peripheral edge. A second bend punch (5) formed in a shape corresponding to an intermediate position between the portion (9) and the third peripheral edge portion (10), and a third peripheral edge portion (10).
And a third bend punch (6) having a shape corresponding to that of the third bend punch (6), and the cam mechanism (D) operates the third bend punch (6) to operate the first and second bend punches (4,5). ), And when the third bend punch (6) completes its operation and is separated from the bend die (2), the first and second operations are performed.
A bend die device characterized by actuating a bend punch (4,5).