JPH0753296B2 - Folding machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bending machine, and more particularly, to a ram having one long mold holder so that a plurality of split molds can be easily replaced. The present invention relates to a bending machine adapted to support a split mold via.

[Prior Art] Conventionally, in a bending machine, a plurality of split molds are supported on a vertically moving ram, and a work piece such as a plate material to be bent is placed on a die and positioned at a desired position. Then, bending processing is performed.

For example, when the shape or length of a work piece such as a plate material is changed, an operator must remove a plurality of divided dies from the ram and attach a new die to replace the dies. .

[Problems to be Solved by the Invention] However, in the above-mentioned conventional divisional mold replacement by the worker, the worker may ride on the machine to perform work, or there may be a place where one worker cannot reach. It was a very troublesome task. In addition, the width of the split molds is difficult to position, and it depends on the intuition of the operator at the present time, which is a very inefficient mold replacement work.

As a prior example of the present invention, there is Japanese Utility Model Laid-Open No. 60-166422. In this prior art example, upper die holders supporting one split upper die are connected to each other through an elastic member to form a group, and the upper die for the ram is exchanged for each group. Therefore, a connecting portion or the like that can be freely connected is required for each group, and there is a problem that the configuration becomes complicated.

[Means for Solving the Problem] In view of the above-mentioned problems of the related art, the present invention is directed to a bending machine in which a complicated split mold is detachably attachable to a ram that is vertically movable. A long mold holder in which the mold holder can be detached in the left-right direction and can be carried out freely on the mounting table provided on the side of the bending machine, and a plurality of split molds are mounted, It is not provided so that it can be loaded into the ram from the placing table side.

[Operation] With the above configuration, by carrying out the long mold holder having the plurality of divided molds mounted thereon from the ram onto the mounting table, a plurality of long mold holders are mounted on the mounting table with respect to the long mold holder. The split mold can be removed and replaced. Next, by loading the mold holder into the ram from the mounting table side, the mold can be mounted on the ram.

That is, it suffices to attach and detach a plurality of divided dies to and from one long die holder, and attach and detach this one die holder to and from the ram. It is possible to exchange molds with good efficiency.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 1 and FIG. 2, the frame main body 3 constituting the bending machine 1 includes a base 5 and left and right side frames 7, 9 vertically standing from both sides of the base 5 and both left and right ends. The parts are supported by the upper portions of the side frames 7 and 9 and are composed of upper beam members 11F and 11R and the like which are spaced apart in the front and rear direction.

Support plates 13A and 13B are provided upright near the center of the base 5 in the left-right direction and near the center of the front-rear direction, and both ends of one support plate 13B extending in the left-right direction have side frames 7, Connected to 9. Above the support plates 13A and 13B, a horizontal plate 15 having left and right ends connected to the side frames 7 and 9 is supported.
On the upper surface of the horizontal plate 15, a plurality of die support plates 17F and 17R, whose left and right ends are connected to the side frames 7 and 9, are erected up and down as appropriate in the front and rear. Front and rear bottom dies 19F and 19R whose both ends are connected to the side frames 7 and 9 are respectively supported on the upper portions of the front and rear die supports 17F and 17R. The bottom dies 19F and 19R are workpieces W
Is to support.

Further, as understood from FIGS. 1 and 2, a ram 21 is vertically movably arranged above the bottom dies 19F and 19R. Ram 21 is the front and rear bottom die 19F,
The front-rear width is wider than the interval of 19R, and it is greatly stretched in the left-right direction. The left and right sides of the ram 21 are pivotally connected to the piston rods 27 of the left and right lifting cylinders 25 mounted on the inner surfaces of the side frames 7 and 9 via brackets 23. Therefore, the ram 21 is moved up and down by the operation of the lifting cylinder 25. As shown in FIG. 2, a plurality of protruding pillars are provided on the lower surface of the center of the ram 23.
29 is provided, and a gradient block 31 is provided on the surface of the projecting body 29 corresponding to the bottom dies 19F, 19R so as to be vertically movable.

Top dies 35F and 35R for press-fixing the workpiece W to the bottom dies 19F and 19R via die holders 33F and 33R are detachably attached to the front and rear of the lower surface of the ram 21, as described later. There is. The top dies 35F and 35R are used by being attached with a plurality of divided pieces each having a proper size divided into a plurality of pieces and having an appropriate length dimension according to the width dimension of the workpiece W.

When the workpiece W is pressed and fixed to the bottom dies 19F, 19R by the top dies 35F, 35R, a plurality of pressing cylinders 37F, 37R for pressing the ram 21 are appropriately provided on the lower surface of the beam members 11F, 11R. It is installed at intervals.
Then, a plurality of rotary actuators 39F, 39R corresponding to the respective pressure sillings 37F, 37R are mounted on the upper surface of the ram 21, and the rotary shafts of the respective rotary actuators 39F, 39R are provided with the pressure cylinders 37F, 37R. A plurality of L-shaped movable blocks 41F and 41R are attached so that they can be moved to a position directly below and a position away from directly below the pressing cylinders 37F and 37R.

With the above configuration, only the rotary actuators 39F and 39R are operated after the workpiece W is detected. Therefore, the movable block 41F at the position corresponding to the workpiece W,
Only 41R will be positioned directly below each pressing cylinder 37F, 37R. In this embodiment, since the workpiece W is one long piece, all the rotary actuators 39F and 39R are activated.

In order to bend the end edge of the workpiece W pressed and fixed to the bottom dies 19F, 19R by the top dies 35F, 35R upward, as shown in FIG. Bend beams 43F and 43R are provided so as to be vertically movable. More specifically, Bend Beam 43F, 43R
Is attached to the upper part of the bending rams 45F and 45R that are vertically movable, and the lower part of each bending ram 45F and 45R is rotatably attached to the horizontal plate 15 via a plurality of brackets 47F and 47R. The eccentric shafts 49F and 49R that are supported are fitted and supported on the eccentric portions. Therefore, by raising the eccentric shafts 49F, 49R and raising the bend beams 43F, 43R above the upper surfaces of the bottom dies 19F, 19R, the top dies 35F, 35R
As a result, the end edge of the work piece W pressed by the bottom dies 19F and 19R is bent upward.

Each of the bending rams 45F and 45R corresponds to the die support plate 1
It is regulated by being urged inward by appropriate ammunition 51F, 51R such as a coil spring mounted between 7F, 17R.

In order to rotate the respective eccentric shafts 49F, 49R, the respective eccentric shafts 49F, 4R
Arm members 53F and 53R are integrally attached to the 9R, respectively, and the tip portions of the arm members 53F and 53R are connected to the tip portions of the piston rods 57F and 57R of the bending cylinders 55F and 55R via pins. It is connected.

Therefore, the piston rod 5 of each bending cylinder 55F, 55R
The eccentric shafts 49F and 49R are rotated by expanding and contracting the 7F and 57R. By the rotation of each eccentric shaft 49F, 49R, each bend beam 43F, 43R rises from the upper surface of the bottom die 19F, 19R via each bending ram 45F, 45R and is pressed against the bottom die 19F, 19R by the top die 35F, 35R. Workpiece W
The edge portion of is bent upward.

The mold holders 33F and 33R described above are detachably attached to the ram 21 in the longitudinal direction of the top dies 35F and 35R. More specifically, the mold holders 33F and 33R shown in FIGS. 1 and 2 are in the form of a single long plate extending in the left-right direction, and are arranged in the left-right direction relative to the ram 21 ( Grooves 59F and 59R are bored along the longitudinal direction at substantially the center of both ends of the ram 21 so as to be attached and detached in the longitudinal direction). In addition, a plurality of rollers 61F, 61R are attached at appropriate positions on the upper portions on both inner sides of the mold holders 33F, 33R, and the ram 2
The rollers 61F and 61R are engaged with the grooves 59F and 59R formed in 1
The mold holders 33F, 33R are movable in the longitudinal direction, that is, in the left-right direction in FIG. 1 by using R as a guide roller.

In order to easily move the mold holders 33F, 33R with respect to the ram 21 in the longitudinal direction, the inverted L-shaped pressing members 63F, 63R for pressing the upper parts of the mold holders 33F, 33R are attached to the ram 21.
It is attached at an appropriate position.

Therefore, the die holders 33F and 33R can be smoothly moved in the longitudinal direction with respect to the ram 21.

On the other hand, rails 65F and 65R extend and are attached to the lower portions on both inner sides of the mold holders 33F and 33R along the longitudinal direction of the mold holders 33F and 33R. Grooves 67F and 67R are formed on the upper outside of each of the divided pieces of the top dies 35F and 35R.
The rails 65F and 65R engage with the F and 67R.

Therefore, the divided pieces (divided dies) of the top dies 35F, 35R engage along the rails 65F, 65R attached to the inner lower portions of the die holders 33, 33R, and the die holders 33F, 33
It can be easily attached and detached in the longitudinal direction of R, that is, in the left-right direction in FIG. 1, for example, the right direction. Support blocks 69F and 69R that support the top dies 35F and 35R are provided between the inside of the top dies 35F and 35R and the gradient block 31.

Of the top dies 35F, 35R, for example, the top dies 35F,
As shown in FIG. 1, a center division piece 71, side division pieces 73 of the same shape and the same size, which are respectively arranged on the left and right sides, and several pieces arranged between the center division piece 71 and the side division pieces 73 are arranged. It is composed of divided pieces 75 having the same shape and the same size. Therefore, the length of the top die 35F can be selected by selecting the number of the divided pieces 75 according to the workpiece length of the workpiece W to be bent.

Further, the stopper pieces 77 are engaged with the rails 65F and fixed with bolts or the like on both sides of the side divided pieces 73, so that the divided pieces of the top die 35F are fixed so as not to move in FIG.

In order to pull out the mold holders 33F and 33R from the ram 21 in the right direction as shown by the arrow in FIG. 1, a fertilizer 79 is attached to the right side of the mold holders 33F and 33R. Further, the side frame 7 is provided with an opening 81 so that the die holders 33F, 33 to which the top dies 35F, 35R are attached can be pulled out to the outside of the machine on the right side in FIG.

In addition, in FIG. 1, the mold holders 33F and 33R with the top dies 35F and 35R mounted on the right side of the side frame 7 of the bending machine 1 are shown by arrows with the operator's fattening the fertilizer 79. Further, a placing table 83 is provided which is pulled out from the opening 81 to the right and placed.

More specifically, the mounting table 83 includes a plurality of, for example, two side frames 85, a horizontal support frame 87, and a plurality of, for example, two support arms 89 that join the side frame 7 and a substantially central lower portion of the horizontal support frame 87. Etc. On the horizontal support frame 87, a plurality of guide rollers 91 are rotatably mounted at appropriate intervals in a direction orthogonal to the paper surface in FIG.

Therefore, when exchanging the top dies 35F, 35R, the operator fertilizes the fertilizer 78 attached to the die holders 33F, 35R, and moves the top dies 35F, 35F to the right side as shown by the arrow in FIG.
Pull out the mold holders 33F and 33R with the 35R attached. After the mold holders 33F, 33R with the pulled out top dies 35F, 35R are once placed on the placing table 83, the top dies 35F, 35R
Mold holders 33F and 33F
The side surfaces of the die holders 33F and 33R are placed on the placing table 83 with the R inclined at 90 degrees. Next, the bolts of the stopper member 77 are loosened, the side divided pieces 73 on the right side are sequentially pulled out from the die holders 33F, 33R, and the necessary divided pieces 75 are replaced. Further, the center division 71 may be replaced depending on the case. When the length of the top dies 35F, 35R is shorter than the length used, the normal split piece 75 is removed from both sides of the center split piece 71, or when it is made extremely short, the center split piece is Replace 71 with a short one, and split pieces
In combination with 75, the set length should match the workpiece length. When making the length of the top dies 35F, 35R longer than the used length, increase the split piece 75 to both sides of the split piece 71, or replace the center split piece 71 with a long piece to increase the work piece length. The set length may be set according to. In the present embodiment, the divided pieces are pulled out laterally with respect to the mold holders 35F and 35R, but they may be pulled out vertically or in the front-back direction. Top die 35F, 35R
After completing the replacement, attach the stopper member 77 and fix it, raise the mold holders 35F and 35R to the original state, that is, raise 90 degrees, fertilize the fertilizer 79, and push it in the direction opposite to the direction of the arrow to press the groove of the ram 21. 59F, 59R with die holder 35F, 35R roller 61F, 61R
The original state is restored by engaging the.

[Effects] As will be understood from the above description of the embodiments, in short, the present invention is such that a plurality of split molds (75) are detachably attached to a ram (21) that is vertically movable in a bending machine. A long and flexible mold holder (33F) can be attached to and detached from the left and right sides, and can be carried out onto a mounting table (83) provided on the side of the bending machine, and a plurality of split molds (75 ) Is attached to the ram (21) from the placing table (83) side.

Therefore, according to the present invention, the split mold 75 is not attached to and removed from the ram 21 of the bending machine one by one,
Place the required split mold 75 on the mounting table 83 in a long size 1
Since it is configured to be attached to a die holder of one book and to be attached to and detached from the ram 21, one long die holder can be attached to and detached from the ram. Is easy and the efficiency of attachment / detachment and replacement is improved. In addition, it is possible to perform setup outside the bending machine. For example, by mounting the split molds 75 on one mold holder at appropriate intervals, bending can be performed at two positions. It is also possible to respond. further,
At the time of processing in the folding machine, the split mold 75 can be attached and prepared in advance in a separate mold holder, and it is possible to improve the operation rate, and with a simple configuration. The mold can be easily replaced.

[Brief description of drawings]

FIG. 1 is a front view of a bending machine embodying the present invention. FIG. 2 is a side sectional view taken along the line II-II in FIG. [Explanation of the symbols indicating the main parts of the drawing] 1 …… Bending machine 21 …… Ram 33F, 33R …… Mold holder 35F, 35R …… Top die 75 …… Split mold 83 …… Placement table

Claims (1)

[Claims] 1. A long mold holder (33F) in which a plurality of split molds (75) can be removably mounted on a ram (21) that can move up and down in a bending machine can be mounted in the left-right direction. Also, a long mold holder (33F), which is provided so that it can be carried out freely onto a mounting table (83) provided on the side of the bending machine, and in which a plurality of split molds (75) are mounted, A bending machine characterized in that it is provided so as to be freely carried into the ram (21) from the placing table (83) side.