JPS6044052B2 - bending machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bending machine for bending rod-shaped workpieces such as reinforcing bars.

In this type of bending machine, the workpiece is generally placed between a guide roller and a bending roller, and the reaction force when bending the workpiece is received by a reaction force member, and the bending roller is moved around the guide roller. Bending at a predetermined angle is performed by revolving in one direction, for example, clockwise.

After the processing is completed, the bending roller is rotated counterclockwise to return to the starting point. In other words, only one bending process can be performed in one operation. Therefore, if there are many bent parts, such as a lightning bolt, and the directions of the bending are reversed, the workpiece must be reversed and bent each time. Ta. This reversing work is hard work, increases operator fatigue, and is also undesirable from a safety standpoint. Further, there was a problem that the bending process had to be interrupted for a considerable period of time, making it impossible to perform the bending process efficiently. This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a bending machine that can process two bent parts in opposite bending directions in one operation. This is what we are trying to provide.

The bending machine of the present invention includes a bending roller that is reciprocated within a range of about four semicircles centered on the origin of the X-axis and Y-axis on the table, and a bending roller that is installed inside the movement locus of the bending roller. a first reaction force member disposed in the X-axis direction in cooperation with the guide roller that receives a reaction force during the first bending of the workpiece, and a first reaction force member disposed in the X-axis direction in cooperation with the guide roller, and a second reaction force member that receives the reaction force during the second bending of the workpiece, and the guide roller is
The position of the first and second reaction force members is adjustable in the axial direction, and the positions of the first and second reaction force members are adjustable at least in the Y-axis direction.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a rectangular table on the upper surface of the housing, and this table is formed with arcuate slots 2 centered on the origin and d of the X and Y axes, which serve as passages for the bending rollers 4.
A disk 3 is provided in the housing below the table 1 and is driven to rotate between origins by a drive device (not shown).
is provided so as to protrude above the table 1. A control mechanism for reciprocating the bending roller 4 within the slot 2 within a predetermined angular range of approximately four semicircles from the starting position shown in FIG. 1 is built into the drive device for the disk 3. . Reference numeral 5 denotes a slider built into the table 1 flush with the table 1 inside the slot 2, and is slid in the direction of the arrow shown in the figure by a drive mechanism 7 attached to a sleeve 6 fixed to the table 1 in accordance with the scale 5a. Ru. A guide roller 8 is attached to this slider 5. Further, the slider 5 is provided with a hole 10 into which a small diameter portion of a stepped roller serving as the first reaction member 9 is inserted. The stepped roller, which is the first reaction force member 9, receives the reaction force during bending in cooperation with the guide roller 8, and depending on the diameter of the workpiece A arranged in the X-axis direction. Several types with different large diameter portion sizes are prepared so that the distance between the bending roller 8 and the bending roller 8 can be adjusted. In the above configuration, by moving the slider 5, the guide roller 8 and the first reaction member 9 are moved to the guide roller 8.
The position is adjusted simultaneously in both the X-axis and Y-axis directions while maintaining the relative position. 15 is a sizing device, and X is attached to the slider 5.
It is comprised of a stopper arm 13 that extends in the axial direction and has a scale 13a at its tip, and a stopper 14 that is clamped to this stopper arm with a handle 14a.

16a to 16d are second holes provided outside the circular arc slot 2 of the table 1 at a position substantially facing the first reaction force member 9;
These are holes for attaching the reaction force members 17, and are spaced apart on a downwardly sloping line on the left in the figure.

The second reaction force member 17 is a stepped roller similar to the first reaction force member 9, and is positioned at the end point 4'' of the bending roller 4 by inserting and positioning the small diameter portion into the mounting holes 16a to 16d.
In response to this, the position can be adjusted in the X-axis direction as well as the Y-axis direction. Ru. Further, like the first reaction force member 9, several types with different large diameter portion dimensions are prepared so that the distance between the end point position and the bending roller can be adjusted according to the diameter of the workpiece A. The procedure for bending a lightning bolt using the bending machine having the above configuration will be explained with reference to FIGS. 2 and 3.

In addition to the diameter d, the length 11 of the upper side, the length 12 of the oblique side, and the length 13 between the ends of the upper side and the oblique side are generally specified as the dimensions of the lightning conductor. When the lengths of the three sides are specified, the shape of the triangle is specified, so the relative positional dimensions between the guide roller 8 and the rotation end position 4'' of the bending roller 4 are determined by taking into account the diameter d. X and y are determined.

In order to satisfy these X and y dimensions, first, the position of the slider 5 is adjusted and the rotation angle of the disk 3 to which the bending roller 4 is attached is set. Next, a stepped roller serving as the first reaction force member 9 having a large diameter portion size corresponding to the muscle diameter d is set. In addition, the diameter of the large diameter portion of the second reaction member 19 and the mounting position in the Y-axis direction are selected in accordance with the rotation end position 4'' of the bending roller. Finally, the position of the stopper 14 of the sizing device 15 is adjusted from the guide roller 8 to the length 11 of the upper side and the length 1 of the oblique side.
. is set at a position with a length of 14, which corresponds to the sum of the lengths.Thus, the setup for bending is completed.
In the bending process, the workpiece A is first inserted between the guide roller 8 and the first reaction member 9 as shown in FIG. 2, and its tip is brought into contact with the stopper 14 of the sizing device 15.

Then, the disk 3 is started to rotate. The workpiece A is bent by the bending roller 4 with the guide roller 8 as a fulcrum, and while the workpiece A hits the second reaction member 17 as shown in the imaginary line A, the first bending portion a1 is bent. Most of the processing is done. The reaction force during this time is received by the first reaction force member 9. From this state, the bending roller 4 is further rotated continuously to the end position 4''. At this time, the workpiece A is supported by the guide roller 8 and the second reaction member 17, and is pushed by the bending roller 4. The bending process of the second bent part E and the first bent part a1
After the bending process is completed, it is bent into the Z shape shown in the phantom line. Next, when the disk is rotated in the opposite direction and the bending roller 4 returns to the starting position, the workpiece A is moved to the first bending portion a1.
3 until it hits the stopper 14 of the sizing device 15, as shown in FIG.

Then, by starting up the disk 3 again, the bending process of the first bending part A2 and the second bending part B2 of the second stage is performed in the same manner as described above, and the bending process of the second stage is completed. In this way, by simply transversely feeding the first bent portion of the workpiece A until it hits the stopper and performing the bending process, the lightning trace can be bent almost continuously. Furthermore, by positioning and setting each part, it is possible to perform various types of bending processes for the dorsal wire according to the specification dimensions.
In the above embodiment, the guide roller 8 and the first reaction member 9 are attached to the slider 5 in order to be able to perform the bending process of the generally used dorsal bar with a relatively simple device configuration. By moving the slider 5 diagonally, both the guide roller 8 and the first reaction member 9 can be moved simultaneously in the X-axis and Y-axis directions, and the second reaction member 19 can also be moved at the mounting position. By changing , it is possible to move in the X-axis and Y-axis directions.

However, the guide roller and the first reaction member are each attached to separate members so that the guide roller alone can move in the X-axis and Y-axis directions, and the first reaction member also moves at least in the It may also be movable in the axial direction.

Similarly, the second reaction member may also be attached to the attachment member so that it can move at least in the Y-axis direction, corresponding to the end position of the bending roller. Further, both the first reaction member and the second reaction member are configured as stepped rollers by changing the diameter of the large diameter portion to obtain substantially the same effect as moving each member, but the reaction member If the position of the roller can be finely adjusted, its shape is not limited to a roller. Since the bending machine of the present invention is as described above, it has the following effects.

1. A Z-shaped bending process having two bent portions with opposite bending directions can be performed in one bending operation.

2. Items having multiple Z-shaped bending parts, such as lightning bolts, can be bent safely and efficiently by simply moving them sideways, without the need for reversing work as in the past.

A single bending machine can bend various types of lightning rods with three different specification dimensions.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of the bending procedure, respectively. 1...Table, 3...Disk, 4
...Bending'' roller, 5 ...Slider, 8
...Guide roller, 9...First reaction member, 10...Mounting hole, 14...Stopper, 15
... Sizing device, 16a to 16d ... Mounting hole, 17 ... Second reaction member, O ...
origin.

Claims (1)

[Claims] 1. A bending roller that reciprocates within a range of approximately four semicircles with a variable movement range centered on the origin of the X-axis and Y-axis on the table;
a guide roller provided inside the movement locus of the bending roller; a first reaction force member disposed in the X-axis direction in cooperation with the guide roller and receiving a reaction force during the first bending of the workpiece; a second reaction force member provided outside the movement locus of the bending roller to receive the reaction force during the second bending of the workpiece; the guide roller is adjustable in position in the X-axis and Y-axis directions; A bending machine in which the first and second reaction members are provided so that their positions in the Y-axis direction can be adjusted at least. 2. The bending machine according to claim 1, wherein the guide roller and the first reaction member are attached to a slider that is moved diagonally on the table surface. 3. The bending machine according to claim 1 or 2, which is provided with a sizing device that limits the length from the guide roller by bringing the end of the workpiece into contact.