JPH0221139Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field The present invention relates to a bending machine equipped with a positioning device, and more specifically, for positioning a workpiece, the bending beam is placed on the entrance side (front) of the front stage machine and on the bend beam of the rear stage machine. This invention relates to a bending machine equipped with a positioning device that improves work efficiency by providing a stopper further forward.

B. Technical background of the invention and its problems Conventionally, in an apparatus for bending a plate material, such as a bending machine, there is a device as shown in FIG. 6 as a workpiece tip positioning device.

From the entrance side of the bending machine 101 (left side in the drawing), the bottom die 103F and top die 105F in the previous stage
After the workpiece W (plate material) is transferred and positioned between the two, one end edge of the workpiece W is bent. Then top die holder 10
7 to release the fixation of the workpiece W, transfer the workpiece W to the exit side (the right side in the drawing), and remove the bottom die 103R and the top die 10 in the subsequent stage.
5R, after the workpiece W which has been positioned is fixed, the other end edge of the workpiece W is bent.

As described above, the positioning device 109 for positioning both end edges of the workpiece W is disposed between the plurality of divided transport conveyors between the bend beams 111F and 111R. Note that the stopper 113 provided in the positioning device 109
is provided so as to be movable in the entrance and exit directions, and also to be retractable into the pass line so as not to interfere with the workpiece W when the workpiece W passes therethrough.

However, with a single positioning device, the positioning is performed for each workpiece W, and the positioning is performed using different end faces of the workpiece W as a reference, which poses problems in terms of dimensional accuracy and requires a lot of work time. The current problem is that it is not possible to improve work efficiency.

C. Purpose of the invention This invention was created in view of the problems mentioned above.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a bending machine equipped with a positioning device that improves work efficiency by providing a stopper on the entrance side and between the bend beams for positioning the workpiece.

D. Means for solving the problem The present invention has the following configuration in order to achieve its purpose.

That is, the bending machine equipped with the positioning device according to this invention is provided with a stopper that is movable in the direction of the front and rear bending machines and that can be freely retracted from the pass line, and the stopper is moved in the direction of the front and rear folding machines. It is provided in front of the bend beams of the front and rear bending machines.

E. Embodiments of the invention Hereinafter, embodiments of the invention will be specifically described with reference to the drawings.

First, to explain the side view of the bending machine shown in FIG. This supports W.

Further, a top die holder 7 is disposed above the bottom dies 5F, 5R so as to be movable up and down by an elevating cylinder 9.

At the front and rear of the bottom surface of the top die holder 7,
Top dies 11F and 11R for press-fixing the workpiece W to the bottom dies 5F and 5R are removably attached, respectively.

In addition, when the workpiece W is pressed and fixed to the bend beams 5F, 5R by the top dies 11F, 11R, a plurality of pressing cylinders 13F are provided to press the top die holder 7 so that it does not curve upwardly convexly due to a single load or the like. , 13R is an upper beam member 15 whose left and right ends are fixed to the frame 3.
It is installed on F and 15R.

The workpiece W is pressed and fixed to the bottom dies 5F, 5R by the top dies 11F, 11R.
Bend beams 17F, 1 are provided inside the bottom dies 5F, 5R to bend the end edges of the
7R is provided so as to be movable up and down.

These bend beams 17F, 17R have an eccentric axis 1
Supported by 9F and 19R, bending cylinder 21
Due to the expansion and contraction operation of F, 21R, the eccentric shaft 19F, 1
9R is rotated, and the top dies 11F, 11R bend the edge portions of the workpiece W pressed against the bottom dies 5F, 5R upward.

During this bending, a wedge-shaped guide member 25 supported by a guide portion 23 directs the bend beams 17F, 17R toward the top dies 11F, 11R.
F, 25R are attached to the lower surface of the top die 7 so as to be vertically adjustable.

The workpiece W positioning devices 27A and 27 bottom die are located on the entrance side (front) of the bending machine 1 (the first
A transport conveyor 29A divided into a plurality of parts provided between the left side in the figure) and the bend beams 17F and 17R is arranged in each divided space of 29B, and is provided with stoppers 31A and 31B at the upper part. The stoppers 31A and 31B are provided so as to be movable in the direction of the front and rear stages, and are also provided so as to be retractable into the pass line so as not to interfere with the workpiece W when the workpiece W passes through.

The above configuration is the bending machine according to this embodiment,
Next, the positioning device according to the present invention will be explained in detail with reference to FIGS. 1 to 3.

In addition, the positioning devices 27A and 27 provided in front of the front-stage bending machine and in front of the bend beam
B has the same configuration except for the difference in the amount of movement, so the positioning device 27B provided in front of the rear bend beam will be described as a representative.

The width of the conveyor 29B is divided into a plurality of sections, and a stopper 31B is provided in this divided space for positioning by abutting the end of the workpiece W that has been reversely conveyed on the pass line by the conveyor 29C. be.

In the drive mechanism for positioning, a motor 33 (such as a servo motor) serving as a drive source is fixed to a bracket 37 supported on a side wall of a frame 35 so as to be vertically adjustable. The motor 33 rotates the pulley 41 via the coupling ring 39, thereby rotating the pulley 47 fitted into one end of a threaded rod 45 (such as a ball screw) whose both ends are rotatably supported by a belt 43 (such as a timing belt). .
Further, the nut meshed with the threaded rod 45 and the nut holder 49 are fixed to a U-shaped frame 51 to which a stopper 31B is attached, and ball guides are installed at both ends of the U-shaped frame 51 on rails 53 laid on the upper surface of the frame 35. 55 etc., it can be freely moved toward the inlet and outlet sides.

In addition, a pulley 57 directly connected to the motor 33
The threaded rods 45 provided at both ends of the U-shaped frame 51 are rotated via belts, so that the U-shaped frame 51 can be moved in parallel.

A dog 59 is provided on the side wall of the nut holder 49, and a limit switch 61 detects a moving source to prevent overrun.

Next, the stopper 31B disposed on the U-shaped frame 51 will be explained with reference to FIG.

The cylinder 63 that operates the stopper 31B is
It forms a double cylinder to ensure positional accuracy. (The cylinder structure is a common one, and the explanation is omitted.) This cylinder 63 is connected to the U-shaped frame 51.
rectangular stoppers 31B that are arranged vertically between the transport conveyors 29B, are fixed to the tip of the piston 65, and have a stopper plate 67 hanging thereon;
is moved up and down by the cylinder 63, and can be freely retracted into the pass line. This stopper 31B
The stopper 31B has a detection plate 69 against which the workpiece W comes into contact, and is always urged forward by a built-in spring 71.
(for example, a proximity switch) is provided, and is configured to detect when the workpiece W comes into contact with it and issue a command.

The positioning device having the above structure is disposed in front of the front-stage bending machine and in front of the bend beam of the rear-stage bending machine, and its operation will be explained with reference to FIG. 4.

Workpiece W transported on the transport conveyor 29A from the entrance side (left side in the drawing) of the bending machine 1
Then, the rear end surface is brought into contact with the stopper 31A to set the amount of bending of the tip, and the top die holder 7 is lowered to press and fix the workpiece W between the bottom die 5F and the top die 11F.

After the bending is completed by the bend beam 17F, the top die holder 7 is raised, and the workpiece W is transported to the exit side (right side in the drawing) by the transport conveyors 29A, 29B, and 29C. Next, the conveyor 29C is used to transport the bend beams 17F, 1.
After setting the bending position by bringing the rear end surface of the workpiece W into contact with the stopper 31B provided between the bottom die 5R and the top die 11R, the top die holder 7 is lowered, and after the workpiece W is pressed and fixed between the bottom die 5R and the top die 11R, the bending beam 17R Bend the edge of the workpiece W.

By continuing this operation, the edges of two workpieces can be bent at the same time.

It goes without saying that the present invention is not limited to the embodiments described above, and that various changes can be made without departing from the gist of the present invention.

F. Effects of the invention As mentioned above, this invention provides a positioning device between the entrance side of the bending machine and the bend beam, so that the rear end surface of the workpiece comes into contact with the stopper and determines the bending direction. Therefore, the reference plane is always constant.

Therefore, dimensional accuracy can be ensured better than in the past.

Further, it becomes possible to position each workpiece individually, and simultaneously bend a bilayered workpiece.

As a result, working time can be shortened, working efficiency can be improved, and this can lead to improved productivity.

[Brief explanation of the drawing]

1 to 4 show an embodiment of a bending machine equipped with a positioning device according to the present invention, in which FIG. 1 is a front view, FIG. 3 is a partially enlarged view of FIG. 2 in the direction of the - line, FIG. 4 is an enlarged sectional view of FIG. 2 in the direction of the - line, FIG. FIG. Explanation of the symbols representing the main parts of the drawing, 1...
Bending machine, 17F, 17R...Bend beam, 2
7A, 27B...Positioning device, 31A, 31B
...Stotsupa.

Claims (1)

[Scope of utility model registration request] The object is to use two bending machines with the bend beam in the center, which has a configuration in which a bottom die and a top die fix the plate in a nearly horizontal position, and the free edges of the plate protruded by both dies are bent by raising and lowering the bend beam. A folding machine equipped with a positioning device, characterized in that stoppers are provided in front of the front-stage machine and in front of the bend beam of the second-stage machine, and the abutment height and abutment position of the plate material can be freely adjusted. bending machine.