JPH05309418A - Folding device - Google Patents

Abstract

PURPOSE:To efficiently perform push-type L-shaped folding for two sides to metal plates different in dimension at the same time. CONSTITUTION:A pair of slide base members 11, 13 which are equipped so that they can move in parallel with each other in a contact/uncontact direction (Y-direction) is provided on a base member. L-shape folding sets 27,29 provided with a push function each are equipped to each of this pair of slide base members 11, 13 so that those sets can move in the direction (X-axis direction) which intersects orthogonally at the same t plane to the parallel movement direction of the slide base members 11,13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending device,
In particular, the present invention relates to a bending device for performing push-type L-shaped bending.

[0002]

2. Description of the Related Art As one of the methods for bending a plate material into an L-shape, slit processing is performed on a fold curve portion of the plate material while leaving a minute connecting portion, and along the fold curve, the main portion of the plate material is almost A push-type L-shaped bending method is proposed in which bending is performed at 90 degrees, and the bending piece is displaced (push-displaced) with respect to the plate material main portion in the extending direction by the plate thickness to complete the L-shaped bending. Has been done.

According to this push-type L-shaped bending method,
Even if the plate thickness of the plate material is large, it is possible to obtain a right-angled bent portion which does not require a large bending work force and has excellent appearance.

[0004]

The above-mentioned push-type L-shaped bending may be performed on two parallel sides of one rectangular plate material, and this push-type two-sided L-shaped bending is performed. ,
In the conventional general bending apparatus, first, a push-type L-shaped bend is performed on one side, and then a work handling operation such as inverting the plate material is performed to perform the push-type L-shaped bend on the other side. And work efficiency is poor.

The present invention has been made by paying attention to the above-mentioned problems in the conventional bending apparatus, and it is possible to perform push-type two-sided L-shaped bending at the same time and efficiently for plate materials of various sizes. It is an object of the present invention to provide a folding device which can be well performed and has excellent durability.

[0006]

According to the present invention, there is provided a pair of slide base members provided on a base member so as to be movable in parallel with each other, and the pair of slide base members are provided. A bending process, wherein each of the base members is provided with a plurality of L-shaped folding die sets with a push function so as to be movable in a direction orthogonal to the parallel movement direction of the slide base member in the same plane. Achieved by the device.

Also, in the bending apparatus according to the present invention, the L-shaped bending die set with a push function is supported by the slide base member by a supporting member which is displaceable in the bending force direction with respect to the slide base member. When the bending force is applied, the support member is displaced to sit on the base member.

[0008]

According to the above-mentioned structure, the L-shaped folding type set with a push function provided on each of the pair of slide base members allows the push-type L to be pushed on two parallel sides of one rectangular plate material. Shape bending is performed at the same time.

The L-shaped folding type set with the push function is seated on the base member by the displacement of the supporting member when the bending processing force is applied, and the bending processing force is prevented from acting on the guide portion or the like of the slide base member. To be done.

By parallel movement of the slide base member and movement of the L-shaped folding type set with a push function in each slide base member, simultaneous double-sided push-type L-shaped bending is performed for plate materials of various vertical and horizontal dimensions.

[0011]

Embodiments of the present invention will be described in detail below with reference to the drawings.

Prior to the description of the bending apparatus according to the present invention, the shape of a plate material to be L-shaped pushed by the bending apparatus according to the present invention and the L-shaped bending procedure thereof will be described with reference to FIGS. Will be described. 8 to 10, the plate material P is divided into a plate material main portion Pa and a bending piece Pb by a bending curve slit Sa provided along the bending curve leaving a fine connecting portion J in the bending curve portion. ing. On both sides of the connecting portion J, connecting portion side slits Sb extending from the bending curved slit S to the bending piece Pb by a length substantially equal to the plate thickness of the plate material P are formed in a direction orthogonal to the bending curved slit Sa. There is.

When the plate P is bent into the L shape, first, as shown in FIG. 9, the bent piece Pb is bent along the bending curve slit Sa with respect to the plate main portion Pa by approximately 90 degrees. After completion of this bending, as shown in FIG.
Is the extending direction of the bent piece Pb, in other words, the plate material main portion Pa.
Is pressed in the plate thickness direction to compressively deform the connecting portion J, and the bent piece Pb is displaced with respect to the plate material main portion Pa by the plate thickness of the plate material main portion Pa to bend to the end face portion of the plate material main portion Pa. The pieces Pb overlap each other.

1 to 3 show an embodiment of a bending apparatus according to the present invention. In these drawings, reference numeral 1 indicates a bolster, and a base plate 3 is fixedly mounted on the bolster 1.

1 and 2, the Y-axis slide base members 5 and 7 elongated in the Y-axis direction are provided on both left and right sides of the base plate 3.
Are fixed parallel to each other. A Y-axis linear guide member 9 is attached to each of the Y-axis slide base members 5 and 7 in the Y-axis direction.
7, X-axis slide base members 11 and 13 that are elongated in the X-axis direction, that is, the left-right direction in FIGS.

The X-axis slide base members 11 and 13 have X
In the vicinity of both ends in the axial direction, the Y-axis slide base member 5,
7 is slidably engaged with the linear guide member 9 in the Y-axis direction (horizontal direction when viewed in FIG. 3), and can be moved in parallel in the direction (Y-axis direction) in which they are guided and separated from each other. ing.

A Y-axis feed screw shaft 15 is rotatably attached to each of the Y-axis slide base members 5 and 7 by a bracket 17. One of the Y-axis feed screw shafts 15 is a right-hand thread and the other is a left-hand thread with the central portion in the axial direction as a boundary. Each right-hand thread part has a nut on each side of one X-axis slide base member 11. The portions 11a are screwed together, and the nut portions 13a on both sides of the other X-axis slide base member 13 are screwed into each left-handed screw portion.

The Y-axis feed screw shaft 15 and that of the Y-axis slide base members 5 and 7 are driven to rotate in the forward and reverse directions in synchronization by the Y-axis drive motor 21, and the forward rotation causes the X-axis slide base members 11 and 13 to move to each other. Translate in the direction of moving away,
By the reverse rotation, the X-axis slide base members 11 and 13 are moved in parallel in a direction in which they approach each other. As a result, the separation distance between the X-axis slide base members 11 and 13 in the Y-axis direction is variably set symmetrically to each other.

A central L-shaped folding die set 23 is fixedly attached to the central portion of each of the X-axis slide base members 11 and 13 in the X-axis direction. On both sides of the central L-shaped folding die set 23 of the X-axis slide base members 11 and 13, respectively, the X-axis direction,
That is, when viewed in FIGS.
5 are attached to the X-axis linear guide members 25 of the X-axis slide base members 11 and 13, respectively, and side L-shaped folding die sets 27 and 29 are movably engaged in the X-axis direction. ing.

An X-axis feed screw shaft 31 is rotatably attached to each of the X-axis slide base members 11 and 13 by a bracket 33. X-axis feed screw shaft 31
It extends through both sides of the mounting base 35 of the central L-shaped folding type set 23, and one is a right-hand thread and the other is a left-hand thread with the axial center part as a boundary. The nut portion 27a of the left side L-shaped bending die set 27 is screwed into the portion, and the left side L-shaped folding die set 2 is attached to each of the left screw portions thereof.
The nut portion 29a of 9 is screwed.

The X-axis feed screw shaft 31 and that of the X-axis slide base members 11 and 13 are respectively driven to rotate in the forward and reverse directions by an X-axis drive motor 37, and the left side L-shaped bending type set is driven by the forward rotation. 27 and the right side L-shaped folding die set 29 are moved away from each other, and the left side L-shaped folding die set 27 and the right side L-shaped folding die set 2 are rotated by reverse rotation.
9 are moved in a direction of approaching each other. As a result, the distance between the left side L-shaped folding die set 27 and the right side L-shaped folding die set 29 in the X-axis direction is variable symmetrically with respect to the central L-shaped folding die set 23. Is set.

The central portion of the X-axis slide base members 11 and 13 in the X-axis direction, in other words, the central L-shaped folding type set 2
As shown in FIG. 2, a load receiving block 39 which is opposed to the base plate 3 at a slight gap is fixed to the lower bottom portion of the arrangement position of the base plate 3.

The central L-shaped folding die set 23 and the side L-shaped folding die sets 27 and 29 have the same structure. Here, FIG. 3 is used as a representative thereof to show the side L-shaped folding die set. Two
7 will be described in detail.

The side L-shaped bending die set 27 has a laterally U-shaped holder 41, and the punch portion 4 is provided above the holder 41.
3 and the die part 45 is formed in the lower part.

The punch portion 43 is provided with a punch retainer 49 fitted in the punch support hole 47 and supported by the holder 41 so as to be movable up and down. A punch member 53 is attached to the punch retainer 49 by a through bolt 51 so as to be movable in a vertical direction by a predetermined amount.
Has a flat bottom plate bottom surface 55.

A compression coil spring 57 is mounted between the punch retainer 49 and the punch member 53 with a predetermined preload applied. The compression coil spring 57 urges the punch member 53 downward with a relatively large first spring force.

A bent piece pressing member 59 using an adjusting bolt is fixedly mounted on the punch retainer 49 at a position on one side of the punch member 53 so that the mounting position can be adjusted in the vertical direction.

An outer flange-shaped punch head 61 is fixed to the upper end of the punch retainer 49. A punch retainer 49 is provided between the punch head 61 and the holder 41.
Is attached to the compression coil spring 63 which is biased upward and is positioned at the initial position.

A counter retainer 65 is fixedly attached to the die portion 45. A counter holder 69 is attached to the counter retainer 65 by a through bolt 67 so as to be movable in the vertical direction by a predetermined amount so as to face the punch member 53. The counter holder 69 faces the plate pressing lower bottom surface 55 of the punch member 53. It has a cup shape having a flat plate pressing upper surface 71.

Counter retainer 65 and counter holder 6
A compression coil spring 73 is mounted between 9 and under a predetermined preload. The compression coil spring 73 biases the counter holder 69 toward the punch retainer 49, that is, upward, with a second spring force smaller than the first spring force of the compression coil spring 57.

A bending die 75 is formed on one side of the counter retainer 65. The bending die portion 75 is formed so as to project upward to a height that matches the plate pressing upper surface 71 of the counter holder 69 at the highest position, and the counter holder 69 can slidably contact the side surface of the bending die portion 75 on one side surface. Is joined to.

A ram 77 is attached to each punch head 61 of the central L-shaped folding die set 23 and the side L-shaped folding die sets 27 and 29.
The sui leica 79 attached to the ram 77 come into contact with each other at once, and the ram 77 presses all the punch heads 61 of the central L-shaped fold set 23 and the side L-shaped fold sets 27 and 29 at the same time. There is.

According to the side L-shaped folding die set 27 having the above-described structure, the plate pressing upper surface 7 of the counter holder 69 is formed.
The plate material P is horizontally placed on the plate 1 such that the bending curve slit Sa is aligned with one side surface of the punch member 53 and the bending piece Pb is located on the bending die portion 75 side.

Next, the ram 77 is lowered in the work set state as described above. Then, the punch retainer 49 moves downward against the spring force of the compression coil spring 63, and the plate pressing lower bottom surface 55 of the punch member 51 comes into contact with the plate material P, and the plate material main portion Pa of the plate material P is counter-holder. It is sandwiched by the plate pressing upper surface 71 of 69 and the plate pressing lower bottom surface 55 of the punch member 53 and clamped by them.

When the punch retainer 49 is further lowered by the ram 77 from this state, the punch member 53 pushes the counter holder 69, and the counter holder 69 resists the spring force of the compression coil spring 73 and the counter retainer 65.
It comes to descend and move. As the counter holder 69 descends, the bending piece Pb of the plate material P is bent by the bending die 75.
And the one side surface of the punch member 53 so as to be bent along the folding curve slit Sa with respect to the plate material main portion Pa.

As shown in FIG. 3, when the counter holder 69 descends to the most lowered position, the bent piece Pb is bent by approximately 90 degrees with respect to the plate material main portion Pa, and the punch member 53.
It will rise vertically along one side.

Further, the punch retainer 49 is driven downward by the ram 77, whereby the punch retainer 4 is moved.
9 is lowered while bending the compression coil spring 57, and the bent piece pressing member 59 is bent by this drop and the bent piece Pb.
Comes into contact with the upper end of the. By further lowering the punch retainer 49, the bending piece Pb is pressed downward by the bending piece pressing member 59 in the extending direction of the bending piece Pb, that is, in the plate thickness direction of the plate material main portion Pa. Become so. Due to this pressing, the bending portion Pb is displaced downward with respect to the plate material main portion Pa by the plate thickness of the plate material main portion Pa while the connecting portion J is compressed and deformed, and the bent piece Pb is bent to the end face portion of the plate material main portion Pa. Pb comes to overlap. This completes the push-type L-shaped bending of the plate material P. The push-type L-shaped bending as described above is performed by punching the central L-shaped bending die set 23 and the side L-shaped bending die sets 27 and 29. Since the head 61 is simultaneously pressed by the watermelons 79 attached to the ram 77, the central L-shaped folding die set 23 and the side L-shaped folding die set 27 on the X-axis slide base member 11 are performed. Two
9, the push-type L-shaped bending of one side of the plate material P is performed, and at the same time, the center L on the X-axis slide base member 13 is bent.
Shaped folding type set 23 and side L-shaped folding type set 27, 29
As a result, the push type L-shaped bending of the other side portion of the plate material P is performed.

In this case, the distance between the X-axis slide base members 11 and 13 in the Y-axis direction is determined by the Y-axis drive motor 21 driving the Y-axis feed screw shaft 15 to rotate.
It is set to an appropriate value according to the dimension of the plate material P in the Y-axis direction, and the X-axis drive motor 37 drives the X-axis feed screw shaft 31 to rotate.
The separation distance in the X-axis direction between the side L-shaped folding die sets 27 and 29 mounted on each of the No. 3 is the central L-shaped folding die set 23.
This separation distance, in other words, the arrangement position of the side L-shaped bending die sets 27 and 29 in the X-axis direction may be set to an appropriate value according to the X-axis direction dimension of the plate P. ..

In the above embodiment, the X-axis slide base members 11 and 13 are moved symmetrically with respect to each other in the Y-axis direction.
1 and 13 are asymmetrical, that is, when it is necessary to perform them separately, the Y-axis feed screw shaft 15 is connected to the X-axis slide base member 11
3 which is screwed into the nut portion 11a of the X-axis slide base member 13 and that which is screwed into the nut portion 13a of the X-axis slide base member 13, and the separated Y-axis feed screw shaft 15 and the Y-axis drive motor 21 and FIG. It is only necessary to individually rotate the Y-axis drive motor 81 as indicated by the phantom line.

The movement of the side L-shaped folding die sets 27 and 29 in the X-axis slide base members 11 and 13 in the X-axis direction is asymmetric between the side L-shaped folding die sets 27 and 29, that is, individually. If it is necessary to do so, screw the X-axis feed screw shaft 31 into the nut portion 27a of the side L-shaped folding die set 27 and the nut portion 29a of the side L-shaped folding die set 29. The separated X-axis feed screw shaft 31 may be individually driven to rotate by the X-axis drive motor 37 and the X-axis drive motor 83 as shown by the phantom line in FIG.

4 and 5 show another embodiment of the bending apparatus according to the present invention. 1 and 2 in FIGS.
Portions corresponding to FIG. 3 are indicated by the same reference numerals as those shown in FIGS.

In this embodiment, the timing belt 85 is used to move the side L-shaped folding die sets 27 and 29 of the X-axis slide base members 11 and 13 in the X-axis direction. There is.

The timing belt 85 is spanned between pulleys 87 and 89 rotatably provided at both ends of the X-axis slide base members 11 and 13, and one span portion 85a is provided.
Is connected to the side L-shaped bending die set 27 by the connecting tool 91, and is connected to the side L-shaped bending die set 29 by the connecting tool 93 at the other span portion 85b. By running, the side L-shaped folding die sets 27 and 29 are symmetrically moved toward and away from each other with the central L-shaped folding die set 23 interposed therebetween.

A servo motor 95 is drivingly connected to the pulley 87, and the servo motor 95 drives the timing belt 85 in a circulating manner by driving the pulley 87 in forward and reverse directions.

In this embodiment, the servo motor 95
When the timing belt 85 is driven to travel by the circulator, the separation distance in the X-axis direction between the side L-shaped folding die sets 27 and 29 mounted on the X-axis slide base members 11 and 13 is the central L-shape. It changes across the folding die set 23, which results in an X of the side L-shaped folding die sets 27 and 29.
The arrangement position in the axial direction may be set to an appropriate value according to the dimension of the plate material P in the X-axis direction.

FIG. 6 shows another embodiment of the bending apparatus according to the present invention. Note that, also in FIG. 6, portions corresponding to those in FIG. 3 are denoted by the same reference numerals as those in FIG.

In this embodiment, each L-shaped folding die set (in the figure, only the side L-shaped folding die set 27 is shown as a representative thereof) is provided in each holder 41. An actuator 97 for individually pressing the punch head 61 of the folding type set is mounted by a bracket 99.

The actuator 97 may be a combination of a pulse motor and a feed screw mechanism, a fluid pressure cylinder type, an electromagnetic type or the like.

Actuator 97 of each L-shaped bending type set
Need only be driven synchronously with the same stroke, so that the machining accuracy does not decrease.

Further, when the actuator 97 is mounted on the L-shaped bending die set 27, the force line due to the processing pressure is closed by each holder 41 by the L-shaped folding die set 27, and the bending processing force is increased. It is possible to avoid acting on each slide base and the linear guide portion, and to reduce the required strength of these.

FIG. 7 shows another embodiment of the bending apparatus according to the present invention. Note that, also in FIG. 7, portions corresponding to those in FIG. 3 are denoted by the same reference numerals as those in FIG.

In this embodiment, each of the L-shaped folding die sets (only the side L-shaped folding die set 27 is shown as a representative of the L-shaped folding die sets in the drawing) is connected to the X-axis by the pivot 101 at one end.
It is attached to a support arm 105 that is attached to the axial guide block 103 so as to be vertically swingable, and is vertically swingable to the X-axis guide block 103 together with the support arm 105.

The support arm 105 includes the compression coil spring 10
7, the upward rotation is restricted by the stopper bolt 109, and under the condition that no bending force is applied, the positioning movement of the L-shaped bending die set is not hindered. As described above, the bottom surface 111 is located at an elevated position slightly away from the base plate 3, and the bending processing force acts so as to rotate downward against the compression coil spring 107 until the bottom surface 111 contacts the base plate 3. Is becoming

Therefore, in this case, when the bending force is applied, the bottom surface 111 of the support arm 105 has the bottom plate 111.
The bending force directly acts on the base plate 3.

This prevents the bending force from acting on the niria guide member 25 of the slide base.

In the above, the present invention has been described in detail with respect to specific embodiments, but the present invention is not limited to these, and various embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

[0057]

As can be understood from the above description, according to the bending apparatus of the present invention, a single L-shaped bending die set with a push function is provided on each of a pair of slide base members, so that a single sheet is formed. Push-type L-shaped bending can be performed simultaneously on two parallel sides of a rectangular plate material, and further, parallel movement of the slide base member and movement of the L-shaped bending die set with a push function in each slide base member Due to
It becomes possible to efficiently perform the two-sided simultaneous push type L-shaped bending for plate materials of various sizes.

Further, the L-shaped folding type set with the push function is seated on the base member by the displacement of the supporting member when the bending processing force is applied, and the bending processing force is prevented from acting on the guide portion of the slide base or the like. Therefore, the durability of the guide portion of the slide base is ensured.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a bending apparatus according to the present invention.

2 is a cross-sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged sectional view taken along the line III-III in FIG.

FIG. 4 is a partial plan view showing another embodiment of the bending apparatus according to the present invention.

FIG. 5 is a view taken along the line V-V in FIG.

FIG. 6 is a side sectional view showing another embodiment of the bending apparatus according to the present invention.

FIG. 7 is a side sectional view showing another embodiment of the bending apparatus according to the present invention.

FIG. 8 is a perspective view showing an initial shape of a plate material that is bent in an L shape in a push manner by the bending device according to the present invention.

FIG. 9 is a perspective view showing a first stage of bending of a plate material that is bent in an L shape in a push type by the bending apparatus according to the present invention.

FIG. 10 is a perspective view showing a second stage of bending of a plate material which is L-shaped bent in a push type by the bending device according to the present invention.

[Explanation of symbols]

 1 Bolster 5, 7 Y-axis slide base member 11, 13 X-axis slide base member 15 Y-axis feed screw shaft 23 Central L-shaped bending die set 27, 29 Side L-shaped bending die set 31 X-axis feed screw shaft 41 Holder 43 Punch part 45 Die part 61 Punch head 77 Ram 85 Timing belt 97 Actuator 105 Support arm

Claims (2)

[Claims] 1. A pair of slide base members provided on a base member so as to be movable in parallel in directions of separating from and contacting each other, and each of the slide base members has a plurality of L-shaped folding type sets with a push function. A bending apparatus, wherein the slide base member is provided so as to be movable in a direction orthogonal to the parallel movement direction of the slide base member. 2. The L-shaped folding die set with a push function is supported by the slide base member by a support member that is displaceable in the bending force direction with respect to the slide base member, and when the bending force is applied. The bending apparatus according to claim 1, wherein the bending apparatus is configured to be seated on the base member by displacement of the support member.