JPH08332522A - Bending die and bending machine - Google Patents

Abstract

PURPOSE: To simplify the constitution of a bending die by engaging a base part of a bending piece into an engaging groove provided extensively in the longitudinal direction of a cam shaft and providing plural bending pieces which are adjustably positioned in the longitudinal direction. CONSTITUTION: A work W is interposed between a punch 9 and a die 11. The punch 9 is a lowered and the die 11 is moved relatively with respect to a die holder 19 against a spring 27. A cam shaft 29 is rotated by a striking-plate 41 of the die 11 via a part 39 to be stuck. The bending piece 13 inserted into the engaging groove of the cam shaft 29 is rotated, thereby bending a projecting part Wa of the work W. The bending piece 13 and a split spacer are properly combined and inserted into the engaging groove 49 in order to adjust the interval of the plural bending pieces 13 in correspondence to the work W. By this method, a device moving plural bending dies is not necessitated, whereby the bending machine is miniaturized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending die device for clamping and fixing a work by a punch and a die, and then bending a part of the work protruding from the punch and the die by a bending mechanism using a cam mechanism. The present invention relates to a bending machine equipped with this bending die device.

[0002]

2. Description of the Related Art A conventional bending die device and a conventional bending machine will be briefly described below.

A conventional bending die device is provided with a punch and a die for sandwiching and fixing a work, which are opposed to each other on the left and right, and a bending piece for bending and forming a part of the work protruding from the punch and the die. A die holder having a guide hole for supporting the die is provided at a position facing the punch so as to be movable in the left-right direction relative to the punch, and the die can be moved in the left-right direction with respect to the die holder. Is configured. A die spring is provided between the die and the die holder so as to bias the die to the left (toward the opening of the guide hole).

A camshaft provided with an abutted portion and the bending piece is rotatably provided on the lower side portion of the die holder, and the abutting portion is located in a recess provided on the lower side portion of the die. It is configured as follows. When the die moves to the right with respect to the die holder (bottom side of the guide hole), a part of the die hits the abutted portion to rotate the camshaft in one direction. A camshaft spring for urging the camshaft in the other direction is provided at an appropriate position.

On the other hand, a conventional bending machine is provided with a plurality (for example, three) of the above-mentioned bending die devices, and the front bending die device and the rear bending die device have a ball screw and a servo motor. Is operated to move in the front-back direction toward and away from the central bending die device.

Therefore, by operating the ball screw and the servomotor, the front bending mold device and the rear bending mold device are moved in the front-rear direction so as to move toward and away from the central bending mold device, whereby the front bending mold device is moved. The distance between the bending piece in the apparatus and the bending piece in the rear bending die apparatus is adjusted according to the bending length of the work.

Next, the work is moved and positioned at a predetermined position between the punch and the die in the plurality of bending die devices. Then, by moving the plurality of die holders to the left toward the corresponding punches, the plurality of dies are brought closer to the corresponding punches, and the work is clamped and fixed by the punches and dies in the plurality of bending die devices. Excuse me. Further, by moving the plurality of die holders to the left toward the corresponding punch, the plurality of dies are moved to the bottom side of the corresponding guide holes against the biasing force of the die spring. At this time, a part of the plurality of dies abuts against the abutted portion of the corresponding camshaft to rotate the plurality of camshafts in one direction against the urging force of the camshaft spring. As a result, the bending pieces in the plurality of bending die devices are integrally swiveled in one direction with the corresponding cam shafts, and a part of the work protruding from the punch and the die is bent and formed.

[0008]

However, in order to adjust the intervals between the plurality of bending pieces in accordance with the bending length of the work, a plurality of bending die devices are provided and the plurality of bending die devices are attached to the ball screw. Also, it is necessary to be configured so as to be movable in the direction of approaching and separating by the operation of the servo motor. Therefore, the structure of the bending die apparatus, and eventually the structure of the bending machine becomes complicated, and the bending machine becomes large in size, so that the space cannot be effectively used.

[0009]

In order to solve the above-mentioned conventional problems, as the first means of the present invention,
In a bending die device provided with a punch and a die for sandwiching and fixing a work, and a bending piece for bending and forming a part of the work protruding from the punch and the die, at a position facing the punch, A die holder having a (bottomed) guide hole for supporting the die is provided so as to be relatively movable with respect to the punch in a direction toward and away from the punch, and the die is relatively movable with respect to the die holder. Then, a die biasing member capable of biasing the die toward the opening side of the guide hole is provided, and a camshaft provided with an abutted portion is rotatably provided on the die holder, and the abutted portion is attached to the die. When the die moves to the bottom side of the guide hole with respect to the die holder, a part of the die abuts against the abutted portion to move the camshaft in one direction. A cam stopper for restricting rotation of the camshaft beyond a predetermined rotational position in the other direction, and a camshaft urging member for urging the camshaft in the other direction. A cam shaft is provided with an engaging groove extending in the longitudinal direction, a plurality of the bending pieces are provided in the engaging groove so as to be disengageable, and the plurality of bending pieces are positionally adjustable in the longitudinal direction. Is characterized by.

As the second means, in addition to the constituent features of the first means, the bases of the plurality of bending pieces are configured to be engageable with and disengageable from the engaging grooves, so that the camshaft is rotatably supported. The cam bearing is provided with an insertion groove, and the insertion groove can be communicated with the engagement groove.

As a third means, in addition to the constituent features of the second means, the engagement groove and the insertion groove are communicated with each other when the camshaft is located at a predetermined rotational position. It is characterized by

As a fourth means, in addition to the constitutional requirements of the second or third means, after the bending piece is engaged with the engaging groove, the bending piece is prevented from being separated from the insertion groove. Therefore, the invention is characterized in that a disengagement stopper is provided to make the engagement groove and the insertion groove unable to communicate with each other.

As a fifth means, in addition to the constitutional requirements of any one of the first to fourth means, in order to adjust the position of a plurality of bending pieces in the longitudinal direction, the engaging groove is formed. It is characterized in that the plurality of spacers are engaged with each other to adjust the length of the spacers in the longitudinal direction.

As a sixth means, in addition to the constitutional requirements of any one of the first to fourth means, a plurality of bending pieces are arranged so that their positions can be adjusted in the longitudinal direction. A spacer is engaged between the plurality of bending pieces in the groove and between the bending piece and the disengagement stopper so that the spacer can be adjusted in length in the longitudinal direction.

As a seventh means, in addition to the constituent requirements of any one of the second to sixth means, the cam bearing is configured to be detachable from the die holder. .

As an eighth means, in a bending machine for clamping and fixing a work by a punch and a die, and then bending-forming a part of the work protruding from the punch and the die,
The present invention is characterized by comprising a bending die device which comprises the constituent features of any one of the first to seventh means.

[0017]

With the above construction, when the intervals between the plurality of bending pieces in the bending die apparatus are adjusted in accordance with the bending length of the work, the bases of the plurality of bending pieces are engaged with the engaging grooves. At this time, according to the second to eighth means, the base portion of the bending piece is engaged and inserted from the insertion groove to be engaged with the engagement groove. By adjusting the positions of the plurality of bending pieces in the longitudinal direction, the intervals between the plurality of bending pieces can be adjusted according to the bending length of the work. At this time,
According to the fourth to eighth means, a plurality of spacers whose lengths have been adjusted in advance in the longitudinal direction are engaged and inserted from the insertion groove, and between the plurality of bending pieces in the engaging groove and between the bending piece and the separation stopper. The space between the bending pieces can be adjusted by engaging the bending pieces with each other. Furthermore, the fourth to the eighth
According to the means, after adjusting the intervals between the plurality of bending pieces, the engagement groove and the insertion groove cannot be communicated with each other by the disengagement stopper.

When adjusting the intervals between the plurality of bending pieces in accordance with the bending length of the work, the above-mentioned operation is usually performed with the cam bearing mounted on the die holder.
In the seventh to eighth means, the above operation may be performed in a state where the cam bearing is separated from the die holder.

When the distance between the plurality of bending pieces is adjusted according to the bending length of the work and then the work is bent by the plurality of bending pieces, first, the work is punched at a predetermined position between the punch and the die. Move and position relative to the die. Next, the die holder is moved relatively to the punch in the direction of approaching the punch, thereby bringing the die closer to the punch and clamping and fixing the work by the punch and the die. Furthermore, by moving the die holder relatively to the punch in the direction of approaching the punch, the die is moved to the bottom side of the guide hole relative to the die holder against the biasing force of the die biasing member. Excuse me. At this time, a part of the die abuts against the abutted portion of the camshaft, and rotates the camshaft in one direction against the urging force of the camshaft urging member. As a result, the plurality of bending pieces pivot in one direction integrally with the cam shaft, and bend a part of the work protruding from the punch and the die.

[0020]

1 and 2, a bending robot 1 as an example of a bending machine includes a pair of left and right (upper and lower in FIGS. 1 and 2) robot hands 3, 5 and a robot hand 3, 5. The bending die device 7 provided at the tip of the bending die 5 is provided. The bending die device 7 is provided with a punch 9 and a die 11 that are opposed to each other on the left and right for clamping and fixing the work W, and _a bending piece 13 that bends and forms _a part W _a of the work W protruding from the punch 9 and the die 11. Is equipped with. Here, the robot hands 3 and 5 are movable in the left-right direction and the front-back direction (front and back directions toward the paper surface in FIG. 1, left-right direction in FIG. 2).

The bending die device 7 will be described in detail below.

The punch 9 is detachably mounted on the tip of the left robot hand 3 via a fixing plate 15 and a fixing bolt 17, and the punch 9 extends in the front-rear direction. A die holder 19 is removably provided at the tip of the right robot hand 5 via a fixing bolt 21, and the die holder 19 has a bottomed guide hole 23 for supporting the die 11 so as to be movable in the left-right direction. ing.

The die holder 19 is provided with a plurality of guide bolts 25 that are movable in the left-right direction and cannot be removed, and the tips of the guide bolts 25 are screwed into appropriate positions on the die 11. On the outer peripheral side of each guide bolt 25 between the die 11 and the die holder 19, a die spring 27 capable of biasing the die 11 to the left is provided.

A cam shaft 29 extending in the front-rear direction is rotatably provided above the die holder 19 via a pair of cam bearings 31. The cam shaft 29 is mounted on a step support portion 33 provided on the die holder 19. It is supported.
The cam bearing 31 can be attached to and detached from the die holder 19 via a fixing bolt 35.

Further, the cam shaft 29 is used for the die 11
Is provided with an abutted portion 39 located in the accommodation recess 37 provided in the above, and an abutting plate 41 capable of abutting the abutted portion 39 is provided at an appropriate position of the die 11 (see FIG. 3). . When the die 11 moves to the right (bottom side of the guide hole 23) against the die holder 19 against the urging force of the die spring 27, the abutting plate 41 abuts the abutted portion 39. The camshaft 29 is configured to rotate counterclockwise in FIG. Further, in order to prevent the camshaft 29 from rotating beyond the predetermined rotation position in the clockwise direction in FIG. 1, the base portions of the plurality of levers 43 are integrally provided at appropriate positions of the camshaft 29, A cam stopper 45 is provided at an appropriate position on the upper part of the die holder 19 (the right part in FIG. 1 and the front part facing the paper surface in FIG. 2), which abuts when the lever 43 pivots clockwise in FIG. In order to urge the camshaft 29 in the clockwise direction in FIG. 1, one end of a camshaft spring 47 is connected to the tip of each lever 43, and the other end of each camshaft spring 47 is connected to the die holder. It is connected to the upper portion of 19 at an appropriate position.

Referring to FIGS. 1, 2 and 4, the camshaft 29 is provided with an engagement groove 49 extending in the front-rear direction (left-right direction in FIG. 4). The bases of the plurality of bending pieces 13 are engaged with each other. Since the plurality of bending pieces 13 can be engaged with and disengaged from the engagement groove 49, the pair of front and rear cam bearings 31 are provided with the insertion grooves 51, respectively, and when the cam shaft 29 is located at the predetermined rotation position. The engaging groove 49 and the pair of inserting grooves 51 are engaged with each other. In addition, after the bending piece 13 is engaged with the engaging groove 49, the bending piece 13 is inserted into the insertion groove 5
1 (from the front side insertion groove 51 to the front side and from the rear side insertion hole 51 to the rear side) so as not to be separated from each other, as shown in FIGS. A disengagement stopper 53 is provided which can be taken out so as to make the communication state between the engagement groove 49 and the insertion groove 51 impossible.

Referring to FIGS. 4, 6 and 7, in order to configure the plurality of bending pieces 13 so that the positions thereof can be adjusted in the front-back direction, the space between the plurality of bending pieces 13 in the engaging groove 49 and the bending pieces 13 are formed. A spacer 55 is engaged between the disengagement stoppers 53 (not shown for convenience in FIGS. 6 and 7). Since the length of the spacer 55 is adjustable in the front-rear direction, the spacer 55 has a plurality of divided spacers 55a, 55b, 55c, 55d, which have different lengths in the front-rear direction.
It is configured by being divided by any one of a plurality of dividing spacers 55e. In addition, the division spacers 55a, 55b,
At least one of 55c, 55d, and 55e is
In order to adjust the length in the front-back direction (left-right direction in FIGS. 4, 6, and 7), an appropriate set screw 57 is provided as shown in FIG.
It is provided with a pair of spacer pieces 59 that are joined together by and a shim 61 sandwiched between the pair of spacer pieces 59. In addition,
Split spacers 55a, 55b, 55c, 55d, 55e
A fitting hole (not shown) into which a pin (not shown) as a spacer adjusting jig is fitted is provided on the left side (upper side in FIGS. 4 to 7).

The operation of bending the plate-shaped work W as shown in FIG. 1 will be described.

First, the intervals between the plurality of bending pieces 13 in the bending die device 7 are adjusted according to the bending length of the work W in the front-rear direction. That is, the bases of the plurality of bending pieces 13 are engaged and inserted from the insertion groove 51, and are engaged with the engagement groove 49. Further, in addition to the bending piece 13, any one of the plurality of divided spacers 55a, 55b, 55c, 55d, 55e is engaged and inserted from the insertion groove 51, and the plurality of bent pieces 13 in the engagement groove 49 are inserted. 6 (a), (b), (c) and (d) by engaging the space between the bending piece 13 and the disengagement stopper 53 and the front side bending piece 13 and the rear side bending piece 13 by engaging them. )
(E), as shown in FIGS. 7 (a), (b), (c), (d), and (e), adjustment is made between L _{1 to} L ₉ . After engaging the plurality of divided spacers 55 with the engagement groove 49, the engagement groove 49 and the insertion groove 51 cannot be communicated with each other by the separation stopper 53.

Here, when the distance between the plurality of bending pieces 13 is adjusted in accordance with the bending length of the work in the front-back direction,
Normally, the above operation is performed with the cam bearing 31 mounted on the die holder 19.
There is no problem even if the above-mentioned action is performed in the state of being separated from 9.

When the front-to-back bending piece 13 and the rear-side bending piece 13 are adjusted in the front-rear direction according to the bending length of the work W in the front-rear direction, and then the work W is bent by a plurality of bending pieces 13. First, punch the work W 9
And the die 11 are moved and positioned relative to the punch 9 and the die 11 at a predetermined position between the die 9 and the die 11. Next, the robot hand 3 on the right side is moved to the left to move the die holder 19 relative to the punch 9, thereby bringing the die 11 close to the punch 9, and the work W is punched by the punch 9 and the die 11. Fix with pinching pressure. Further, by moving the robot hand 3 on the right side to the left and moving the die holder 19 to the left, the die 11 is moved to the right relative to the die holder 19 against the biasing force of the die spring 27. . At this time, the abutment plate 41 of the die 11 abuts against the abutted portion 39 of the camshaft 29 to rotate the camshaft 29 counterclockwise in FIG. 1 against the urging force of the camshaft spring 47. Excuse me. As a result, the plurality of bending pieces 13 integrally rotate with the camshaft 29 in the counterclockwise direction in FIG. 1, and the work W projected from the punch 9 and the die 11 is rotated.
Part W _{a of B} is bent and formed.

According to the invention according to the present embodiment as described above, in order to adjust the interval between the plurality of bending pieces 13 in accordance with the bending length of the work W, the plurality of bending pieces 13 are arranged in the front-back direction (engagement). It suffices to adjust the position in the longitudinal direction of the groove 49), and it is not necessary to provide a plurality of bending die devices and a device for moving the plurality of bending die devices toward and away from each other. The structure of the bending machine 1 can be simplified, and the size of the bending machine 1 can be suppressed as much as possible to effectively use the space.

Further, since the cam bearing 31 is provided with the insertion groove 51 and the insertion groove 51 can be communicated with the engagement groove 49, the base of the bending piece 13 and the divided spacers 45a, 45b, 45c, 45d, 45e. The engaging groove 49
Can be easily engaged with a plurality of bending pieces 1
It becomes easy to adjust the interval of 3.

[0034]

As can be understood from the above description of the embodiments, according to the inventions of claims 1 to 5, the intervals between the plurality of bending pieces are set to correspond to the bending length of the work. To adjust, it is sufficient to adjust the position of the plurality of bending pieces in the longitudinal direction of the engaging groove, the plurality of bending mold devices, and
A device for moving a plurality of bending die devices in a direction of approaching and separating is not required, and the configuration of the bending die device and the configuration of the bending machine can be simplified, and the enlargement of the bending machine can be suppressed as much as possible to save space. Effective use can be achieved.

According to the second to fifth aspects of the invention, the cam groove is provided with the insertion groove and the insertion groove can be communicated with the engagement groove. In the invention according to claim 4 or 5, it is possible to easily engage the base portion and the spacer of the bending piece with the engaging groove, and it becomes easy to adjust the intervals between the plurality of bending pieces.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a bending machine rotated by 90 °.

FIG. 2 is a side view in which a main part of the bending machine is rotated by 90 °.

FIG. 3 is an operation explanatory view of a bending piece and a separation stopper.

FIG. 4 is a diagram showing a relationship between an engagement groove and an insertion groove.

FIG. 5 is a view showing a divided spacer provided with a shim.

FIG. 6 is a diagram showing a plurality of modes in which the intervals between a plurality of bending pieces are adjusted.

FIG. 7 is a diagram showing a plurality of modes in which the intervals between a plurality of bending pieces are adjusted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bending machine 7 Bending die device 9 Punch 11 Die 13 Bending piece 19 Die holder 23 Guide hole 27 Die spring 29 Camshaft 31 Cam bearing 37 Housing recess 39 Hitting part 45 Cam stopper 47 Camshaft spring 49 Engagement groove 51 insertion groove 53 detachment stopper 55 spacers 55a to 55e divided spacers

Claims (5)

[Claims] 1. A bending die apparatus comprising a punch and a die for clamping and fixing a work, and a bending piece for bending and forming a part of the work protruding from the die. A die holder having a guide hole for supporting the die is provided so as to be relatively movable with respect to the punch in a direction toward and away from the punch, and the die holder is attached to the die holder in a direction toward and away from the punch. A die biasing member capable of biasing the die toward the opening side of the guide hole, and a rotatably provided camshaft provided with the abutted portion on the die holder, This abutting portion is configured to be located in the recess provided in the die, and when the die moves to the bottom side of the guide hole with respect to the die holder, a part of the die abuts. The camshaft is configured to rotate in one direction, and a camshaft biasing member for biasing the camshaft in the other direction is provided, and the engagement groove is extended in the longitudinal direction on the camshaft. A bending die device, wherein a plurality of bases of the bending pieces are provided in the engaging groove so as to be disengageable from each other, and the positions of the bending pieces can be adjusted in the longitudinal direction. 2. A cam bearing that rotatably supports the cam shaft is provided with an insertion groove for engaging and disengaging the plurality of bending pieces with the engagement groove, and the insertion groove is provided with the insertion groove. The bending die device according to claim 1, wherein the bending die device is configured to be able to communicate with the groove. 3. A disengagement stopper that makes the engagement groove and the insertion groove incommunicable, in order to prevent the bending piece from disengaging from the insertion groove after the bending piece is engaged with the engagement groove. The bending die apparatus according to claim 2, wherein the bending die apparatus is provided. 4. A plurality of spacers are engaged with the engaging groove so that the plurality of bending pieces can be adjusted in position in the longitudinal direction, and the spacers are configured to be adjustable in length in the longitudinal direction. The bending die device according to any one of claims 1 to 4, wherein: 5. A bending machine for clamping and fixing a work by a punch and a die, and then bending-forming a part of the work protruding from the punch and the die, according to any one of claims 1 to 4. A bending machine, comprising the bending die device described.