JPH0115460Y2 - - Google Patents

Description

[Detailed description of the invention] a. Industrial application field The present invention relates to shearing machines, and more specifically, uses a shear line created by a pair of shearing blades, a movable shearing blade and a fixed shearing blade, and movement and positioning of a plate-shaped workpiece. The present invention relates to a shearing machine equipped with a device for setting the parallelism of a material feeding device to the moving direction, for example, in the X-axis direction.

b. Prior art As disclosed in Utility Model Application No. 57-189616 and Utility Model Application No. 57-189717, conventional shearing machines have a method of setting the lowering limit of the movable blade for finishing and adjusting the clearance. A device equipped with a device is known.

However, there was no mechanism for adjusting the parallelism between the moving direction of the material feed device that moves and positions the workpiece for cutting and the shear line created by the movable blade and the fixed blade.

c Problems that the invention aims to solve A shearing machine shears a plate-shaped workpiece by crossing a fixed blade and a movable blade, and the parallelism between the fixed blade and the movable blade must be accurate. has been adjusted to. In recent years, shearing machines have been equipped with material feed devices that horizontally move and position workpieces in the X-axis and Y-axis directions to achieve automation.
By the way, the material feeding device and the shearing machine are in a separated state, and the parallelism between the shear line created by the fixed blade and the movable blade of the shearing machine and the moving direction of the material feeding device, for example in the X-axis direction, may cause vibrations, etc. It was easy to go awry, and each adjustment was extremely troublesome, requiring the entire device to be moved and adjusted.

d Means for Solving the Problem In order to solve the conventional problems as described above, this invention cooperates with a fixed lower blade attached to a work table that supports a plate-shaped workpiece to shear the workpiece. A ram equipped with a movable blade capable of vertically moving is provided, and a carriage grips the workpiece and is movable in the longitudinal direction of the fixed lower blade and in the X-axis direction and the Y-axis direction orthogonal to the longitudinal direction. In the shearing machine, the shearing machine is provided on the work table,
A movable blade holder with the movable blade attached to the lower part of the bottom plate provided on the ram is rotatably mounted via a vertical axis, and the rotational position of the movable blade holder is adjusted about the axis. A setting device is provided that can freely fix the movable blade holder at an adjustment position.

e Effect With the above configuration, the movable blade holder can be rotated around the vertical axis, and the longitudinal direction of the movable blade attached to the movable blade holder can be adjusted parallel to the X-axis direction or the Y-axis direction. I can do it. After adjustment, the movable blade holder can be fixed by means of a setting device. That is, the longitudinal direction of the movable blade can be easily adjusted parallel to the moving direction of the carriage.

f. Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a blanking shear 1 as an example of implementing the present invention.

As is clear from FIG. 2, the shearing operation of the blanking shear 1 is carried out by the first movable shearing blade 3 and the second movable shearing blade 5, which form two mutually orthogonal sides, and the corresponding first fixed shearing blade 7 and the second movable shearing blade 7. 2 fixed shearing blades 9 (in the following description, the two characters "shearing" will be omitted).

Blanking shear 1 is 1 on work table 11
The upper surface of the work table 11 and the upper surface of the fixed lower blades 7 and 9 are provided on the same plane.

A plate-shaped workpiece 1 is placed on the work table 11.
A carriage 15 and one drive motor 17 such as a servo motor are shown as part of a material feeding device that grips the material and automatically moves and positions the material in the X and Y axis directions using a numerical control device.

The carriage 15 grips one end of the workpiece 13, transfers and positions it between the movable and fixed blades of the blanking shear 1, and at once cuts a small square blank 19 (as shown by the two-dot chain line in FIG. 3A). A common task is to cut it down.

The blanking shear 1 of this embodiment as shown in FIG. 2 has a ram 23 that is oscillatedly driven by a drive device (not shown) around an eccentric shaft 25 provided near one end of a frame 21 in the Y-axis direction. is provided,
The other end of the ram swings up and down in an arc.

The clearance between the first movable blade 3 and the first fixed blade 7 is adjusted and set by rotating the eccentric shaft 25 with an eccentric shaft rotation device 27.

The ram 23 is urged in one direction of the X-axis by a bullet 29, and slide blocks 31, 31 provided on a portion of the ram 23 corresponding to the frame 21
are brought into contact with the flat head screw rods 33, 33 on the frame 2.

Therefore, the clearance between the second movable blade 5 and the second fixed blade 9 is adjusted by rotating the flat head screw rods 33, 33 by the adjustment device 35 and adjusting the amount of protrusion from the frame 21. It is possible.

The movable blade 3 of the blanking shear 1 of this embodiment,
5 has a rake angle α, for example, as shown in FIG. 3B, and the fixed blades 7 and 9 are in a horizontal straight line.

If the movable blade is now lowered by the stroke length indicated by ST from the state shown in Figure B, the blanking work will be performed along the path P, Q, and R as shown in Figure A.

In this case, the distance n of QR is smaller than the dimension m of the movable blade 5, etc., indicating that idle shearing occurred at the end of the stroke ST.

C and D in FIG. 3 are diagrams illustrating the closing.
That is, let us consider a case where shearing is performed over two lengths in the X-axis direction using the same movable blades 3, 5 and fixed blades 7, 9 as in FIGS. 3A and 3B. The numerically controlled carriage 15, in which the cutting edge lines of the fixed blades 7 and 9 are set as the reference lines of the X-axis and Y-axis coordinates, shears to the position Q of the two-dot chain line when the stroke amount of ST1 in Figure D is lowered. The workpiece 13 is positioned so that the

However, the shear line between the movable blade 3 and the fixed blade 7 is
If the carriage 15 is not parallel to the direction of movement in the X-axis direction and is even slightly inclined, shearing as shown by the broken line will occur, for example.

Next, the carriage 15 moves and positions the Q point to the position occupied by the P point only in the X-axis direction, and then
When shearing is performed with a stroke amount of +ST2,
The QUV is sheared and the cutoff is completed.

In this case, the cutting will be as shown by the broken line, and the step part at Q will be cut as if it were torn off by a part that is not a regular cutting blade. Therefore, it is important that the shear line created by the fixed blade and the movable blade be exactly parallel to the moving direction of the material feeding device for additional cutting.

In the present embodiment shown in FIGS. 4, 5, and 6, the ram 23 portion is provided with swinging side plates 37, 37 that can swing up and down around the eccentric shaft 25, and a bottom plate 39 that connects the swinging side plates 37, 37. Front plate 41, rear plate 43, channel 4
5. Rib material 47 is provided.

Near the swinging free end of the bottom plate 39, a shaft 5 is connected via bearings 49, 49, as shown in FIG.
1 is provided, and eccentric rings 53, 53 are attached to this shaft body 51 near both ends. This shaft body 51 is further pivotally connected to the lower end portions of connecting rods 57, 57 via metal bearings 55.

The upper end of the connecting rod 57 described above is connected to a crankshaft (not shown), and one rotation of the crankshaft causes the ram 23 to move one reciprocation.

Also, in the center of the shaft body 51, a sector 59 is provided with a key 6.
1 and a portion of the sector 59 is connected by an axle pin 63 to a piston rod 67 of a hydraulic cylinder 65.

This fluid pressure cylinder 65 is provided in the channel 45 described above so as to be swingable around an ear shaft 69. Further, a plurality of lock holes 71 are provided on the surface of the sector 59.
is provided, and a shot pin 7 that fits therein is provided.
A hydraulic cylinder 77 with a piston rod 75 having a piston rod 75 is provided parallel to the shaft 51.

A barrel-shaped projection 79 is provided at the other end of the piston rod 75.
For example, limit switches 81, 8 are provided.
It can be freely engaged with and detached from the operating protrusion of No. 1.

Thus, by rotating the shaft body 51 by a desired angle, the effective length of the connecting rod 57 can be substantially changed, and the machining limits of the ram 23 and the movable blades 3 and 5 can be changed.

By increasing the lowering limit of the ram 23, D in Fig. 3 can be achieved.
As shown in , the shearing operation is temporarily stopped by shearing only the first movable blade 3, and then the lowering limit is lowered and the first movable blade 3 and the second movable blade 5 are continuously sheared, which is a so-called follow-up operation. This is what we do.

The lower surface of the ram 23 has a rectangular movable (shear)
A blade holder 83 is provided. This movable blade holder 8
A shaft 85 is located near the connection point between the first movable blade 3 and the second movable blade 5, which are mounted orthogonally to the bottom plate 3 of the ram 23.
9 is provided with a shaft hole 87.

Sliding plates 86 and 91, which also serve as spacers, are provided on the corresponding surfaces of the bottom plate 39 and the movable blade holder 83.
Lock bolts 93 are provided at six locations passing through arcuate holes with reference to .

A device 95 for setting the swing angle position of the movable blade holder 83 is provided in a portion of the bottom plate 39 located above the movable blade holder 83 described above.

This setting device 95 has, for example, a rectangular hole 97 in the bottom plate 39, and a rectangular hole 97 is provided in both directions of the Y axis.
9 and 99 are attached by appropriate means, and a parallel projection stand 101 is provided which projects upward from the movable blade holder 83 through between the square timber rulers 99 and 99.

Furthermore, as shown in FIG.
Horizontal and parallel push bolts 103, 103 are provided along with lock nuts 105, 105 from 1 to the square rulers 99, 99.

In the above configuration, by loosening the six lock bolts, loosening the lock nut 105 of the swing angle position setting device of the movable blade holder 83, and adjusting the push bolt 103, the movable blade holder 8
3 can be swung around the axis 85 at any angle. Thereafter, the parallelism of the fixed blades 7 and 9 is adjusted appropriately in correspondence with the movable blades 3 and 5.

Therefore, even if the shear lines created by the fixed blade and the movable blade are not parallel to the moving direction of the material feeding device, the above-mentioned parallelism of the shearing machine can be easily and easily, safely and reliably maintained. Adjust to
This resulted in the system being able to be maintained over a long period of time.

g. Effects of the invention As can be understood from the explanation of the embodiments above, this invention works in cooperation with a fixed lower blade attached to a work table that supports a plate-shaped workpiece to shear the workpiece. A ram equipped with a movable blade to perform the process is provided so as to be movable up and down, and a carriage is provided which grips the workpiece and is movable in the longitudinal direction of the fixed lower blade and the X-axis direction and the Y-axis direction orthogonal to the longitudinal direction. In the shearing machine provided on the work table, a movable blade holder with the movable blade attached is attached to the lower part of the bottom plate provided on the ram so as to be rotatable via a vertical axis, and the movable blade holder is rotatably mounted on the bottom plate of the ram, and A setting device is provided which can adjust the rotational position of the movable blade holder and fix the movable blade holder at the adjusted position.

Therefore, according to this invention, it is easy to rotate the movable blade holder, and the longitudinal direction of the movable blade attached to the movable blade holder can be rotated in the X-axis direction or the Y-axis direction.
It can be adjusted parallel to the axial direction. That is, it is easy to adjust the moving direction of the carriage and the longitudinal direction of the movable blade to be parallel to each other, and it is possible to prevent, for example, the shear line for cutting the workpiece from becoming stepped.

It is obvious that the present invention can be implemented not only in blanking shears but also in general shearing machines, and that design changes can be easily made without departing from the technical idea of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a blanking shear as an example machine implementing the present invention, Fig. 2 is a plan view of the ram of the blanking shear shown in Fig. 1, and Fig. 3 is a diagram showing blanking shear work and back-off work. Explanatory diagram, Figure 4 is an enlarged plan view of the same ram as Figure 2, Figure 5 is the same as Figure 4.
FIG. 6 is a right side view of FIG. 4. Explanation of symbols representing main parts of the drawings, 1... Blanking shear, 3... First movable (shearing) blade, 7
...First fixed (shearing) blade, 23... Ram, 83...
...Movable blade holder, 85...Axis, 59...(oscillation angle) setting device.

Claims (1)

[Scope of utility model registration request] A work table 11 that supports a plate-shaped processed material 13
a ram 2 equipped with movable blades 3 and 5 that shear the workpiece 13 in cooperation with fixed lower blades 7 and 9 attached to the ram 2;
3 is provided to be movable up and down, and the carriage 15 is movable in the longitudinal direction of the fixed lower blades 7 and 9 and in the X-axis direction and the Y-axis direction perpendicular to the longitudinal direction while gripping the workpiece 13. In the shearing machine provided on the work table 11, a movable holder 83 with the movable blades 3 and 5 attached to the lower part of the bottom plate 39 provided on the ram 23 is rotatable via a shaft 85 in the vertical direction. A shearing machine characterized by being provided with a setting device 95 for adjusting the rotational position of the movable blade holder 83 about the shaft 85 and fixing the movable blade holder 83 at the adjusted position.