JPH0344341Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a back gauge for positioning a plate material to be bent, and more specifically, in a bending machine having symmetrical bending parts on both front and rear sides. The present invention relates to a back gauge that can quickly position a plate material with respect to a mold in the front and rear bending sections between the front and rear bending sections.

The folding machine is used, for example, when folding a box-shaped product from a plate-shaped work, and folds the rear end of the work supplied from the front of the folding machine in the front folding section. , the workpiece is passed backwards between the upper die and the lower die in the front and rear bending sections of the bending machine, and the front end of the workpiece is bent at the rear bending section. be. At this time, a back gauge is required to regulate the bending position of the workpiece.

However, the above-mentioned folding machine cannot be used as is with a back gauge of a folding machine such as a press brake, which receives workpieces from a single direction. That is, the workpiece must be able to pass backward through the machine, and the workpiece must be processed quickly and reliably at both the front and rear bending sections.

The purpose of this invention is to provide a back gauge that can quickly and reliably position a workpiece sequentially to both the front and rear bending parts.

Hereinafter, this invention will be described in detail with reference to examples.

FIGS. 1 and 2 are explanatory diagrams showing the mounting state of the back gauge G shown in this embodiment in a front view and a left side view thereof. The bending machine 1 has an upper die 3 and a lower die 5 in both symmetrical bending sections on the front side and the rear side, respectively, and bends a workpiece W. A plurality of back gauges G are provided, and can be applied to both large and small works with the right end of the bending machine as a reference. As shown in FIG. 2, the rear end W ₁ of the workpiece W placed on the front table 7 is first bent, and then the workpiece is moved to the rear table 9 on the left side in the figure, and the front end W ₂ of the workpiece is bent. fold.

Detailed views of the back gauge G are shown in FIGS. 3 and 4. 3 is a longitudinal sectional view of FIG. 2 viewed from the front, and FIG. 4 is a partial explanatory view of a portion of FIG. 3 viewed from the right.

A thread is cut on the outer periphery of the adjustment arm 11, a key groove 13 is cut in the vertical direction, and abutment detection sensors S ₁ ,
Provide S ₂ . The moving means for moving the adjustment arm 11 in the front-rear direction of the bending machine is provided by the rotation of an upper pulley 17 provided in the outer cover 15 so as to be screwed together with the outer periphery of the arm via a bearing. It is done. A key 19 for guiding the keyway 13 is provided on the inner surface of the outer lid 15. A lower pulley 25 supported by a drive shaft 23 below the gauge support 21 is driven by a drive motor M, and an upper pulley 17 and a lower pulley 25 are connected by a timing belt 27. upper pulley,
Both the lower pulleys have teeth carved to match the tooth pitch of the timing belt 27. The timing belt is not shown in FIG. Furthermore, as shown in FIG. 4, in this example, due to space constraints, the timing belt is twisted and the rotation direction is changed by 90 degrees.

The bottom of the gauge support 21 is supported by a cylinder 31 provided in the outer cylinder 29 via a piston rod 33. Reference numeral 35 indicates a guide member. Outer cylinder body 29
is fixed to the top plate 37 of the bending machine, and the gauge support 21
is movable up and down with respect to this top plate 37, and its upper part is movable in and out of the pass line through which the workpiece W passes back and forth. In this example, a top plate is fixed to the upper part of the movable frame 39, and the lifting mold 41 is raised and lowered to bend the workpiece W. That is, the gauge support 21 is raised and lowered simultaneously when the lifting die 41 is raised and lowered, and is also moved up and down by the cylinder 31.

The operation of the back gauge having the above structure will be explained. A description will be given starting from the point in time when determining the rear end position of the workpiece W fed from the right in FIG. 3. In order to set the rear end of the workpiece W at a desired position, the drive motor M is rotated to rotate the timing belt 27 and rotate the upper pulley 17. The adjustment arm 11 is guided by the key 19 and moves to a desired position. The rear end of the workpiece W is abutted against the tip position of the adjustment arm 11, and the abutment detection sensor S ₁
detects this collision. Then, the upper mold 3 descends and fixes the workpiece W between it and the lower mold 5. FIG. 3 shows the state at this time. Next, the movable frame 3
9 raises the elevating mold 41 to perform the bending operation. At the time of bending, the gauge support 21 and the outer cylinder 29 also rise together with the movable frame 39.

When the bending operation is completed, the drive motor M is rotated, and the adjustment arm 11 moves rearward until its center comes to the center position of the upper pulley 17. When it reaches the center position, the piston in the cylinder 31 descends, and the gauge support 21 is pulled by the piston rod 33 and descends. At the same time, the movable frame also lowers,
The adjustment arm 11 lowers the height of the outer cover 15 to be lower than the height of the workpiece W while sinking between the two lifting molds. On the other hand, the upper mold moves up to release the workpiece W, and then allows the workpiece W to pass backward.

After the workpiece W moves backward, the adjustment arm 11
is lifted up again by the lifting means, and the adjusting arm 11
After aligning the rear end with the front end of the work being returned from the rear and lowering the upper die to fix the work, the bending operation begins again. The above operations are repeated.
Abutment detection sensors provided at both ends of the adjustment arm 11
Regarding S ₁ and S ₂ , only the sensor positions are shown and the wiring necessary for this is omitted, but it is also possible to pass them through the adjustment arm 11, or it is also possible to wire them outside.

In FIG. 1, a plurality of back gauges G are provided. The reason why a plurality of back gauges are provided in this way is to accommodate workpieces of various sizes, but since the adjustment arm 11 of the back gauge G with the above configuration does not rotate within a horizontal plane, adjacent back gauges do not interfere with each other. do not have. Therefore, it becomes possible to provide them extremely close to each other. Further, regarding the back and forth movement of the adjustment arm 11, accurate and quick positioning can be achieved by controlling the drive motor with a pulse motor or the like.

As can be understood from the above description of the embodiments, the gist of the invention is as stated in the claims for utility model registration. Relating to a back gauge in a bending machine that is equipped with symmetrical bending sections on the front and back for performing the W bending process,
The upper part of the gauge support 21 disposed between the front and rear bending parts is provided so as to be able to protrude and retract from the pass line of the workpiece W, and the adjustment arm 11 supported on the upper part of the gauge support 21 is moved in the front and back direction. The adjusting arm 11 is provided so as to be movable and adjustable, and has abutting portions for the workpiece W when positioning the workpiece relative to the front and rear bending portions at both front and rear ends of the adjusting arm 11.

With the above configuration, in the present invention, when the workpiece W is bent by the front bending section, one end of the workpiece W is brought into contact with the front end of the adjustment arm 11, making it easy to position the workpiece. It is something. After fixing the workpiece W by the upper die 3 and lower die 5 in the front bending section and bending one end of the workpiece W, the adjustment arm 11
By lowering the upper part of the gauge support 21 supporting the workpiece W from the pass line of the workpiece W, the workpiece W can be quickly and easily moved to the positions of the upper die 3 and the lower die 5 in the rear bending section. , and by re-protruding the gauge support 21 from the pass line, the other end of the work W can be brought into contact with the rear end of the adjustment arm 11, and the work W can be positioned quickly and easily. be.

That is, according to the present invention, since the upper part of the gauge support 21 can freely move in and out of the pass line,
The work W can be quickly and easily moved from the positions of the upper die 3 and lower die 5 in the front bending section to the positions of the upper die 3 and lower die 5 in the rear bending section. . Further, when fixing the workpiece W by the upper mold 3 and lower mold 5 at the front and rear bending parts, the adjustment arm 11 supported on the gauge support 21 is adjusted back and forth, and the front end of the adjustment arm 11 or Since positioning is performed by abutting the workpiece W against the rear end, the adjustment arm 11 can be used for both front and rear positioning, which simplifies the configuration and allows the workpiece W to be positioned quickly and easily. It is something.

Note that this invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments by making appropriate changes.

[Brief explanation of the drawing]

Figure 1 is a front view of the bending machine showing how the back gauge is installed, Figure 2 is a left side view of Figure 1, Figure 3 is a vertical sectional view of the back gauge, and Figure 4 is Figure 3 from the left. A partial explanatory diagram showing a part of the transportation means as seen. G...back gauge, 1...bending machine, 3...upper die, 5...lower die, 11...adjustment arm, 21...
Gauge support body, 41...lifting mold, _S1 , _S2 ...butt detection sensor.

Claims (1)

[Scope of utility model registration request] A bending section is provided in the front and back, which is provided with an upper die 3 and a lower die 5 for fixing a plate-shaped workpiece W, and an elevating die 41 for bending the workpiece W fixed to the upper die 3 and the lower die 5, which can be raised and lowered. The upper part of the gauge support 21, which is used as a back gauge in a bending machine and is arranged symmetrically and spaced apart, is arranged between the front and rear bending parts so that it can freely move in and out of the pass line of the workpiece W in the front and back direction. The adjustment arm 11 supported on the upper part of the gauge support 21 is provided so as to be movable and adjustable in the front and back direction, and serves as a contact part of the workpiece W when positioning the workpiece W with respect to the bending part on the front side. is provided on the front end side of the adjustment arm 11, and a contact portion of the work W when positioning the work W with respect to the rear bending portion is provided on the rear end side of the adjustment arm 11. back gauge.