JPS6158248B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shearing machine, and more particularly to a pendulum-type running shearing machine in which upper and lower blades for shearing a traveling material are provided in a housing that swings.

In conventional pendulum-type running shearing machines, feeding of material relies only on the fixed rollers on the inlet side and the fixed roller on the outlet side, and the position of these fixed rollers depends on the swing angle and the swing angle depending on the speed of the material.
It is difficult to approach the shear body because it is limited by the size of the shear body, shear length, etc. Therefore, with the conventional technology, it is extremely difficult to thread the sheet, and there are many accidents such as bending the material and hitting the fixed roller, and the problem of sheet threading has become a major obstacle for pendulum-type running shears. There is.

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks and provide a pendulum-type running shearing machine that can easily and effectively thread materials.

The present invention is characterized by an upper tool attached to an upper tool rest that moves up and down and connected to a crankshaft that rotates to shear moving materials via a connecting rod, and a lower tool rest that moves up and down. and a lower cutter attached thereto are respectively disposed in the housing, and a swing link that is operated by the drive source of the crankshaft and swings the housing in synchronization with the vertical movement of the upper cutter engages with the housing. In the pendulum-type running shearing machine, material guiding shears are suspended by first and second hydraulic cylinder devices on the inlet and outlet sides of the material to be sheared with respect to the upper and lower cutters, respectively. rollers are disposed, and these first and second hydraulic cylinder devices are attached to the housing, and elevating guides for guiding both the rollers in an ascending and descending manner are respectively installed in the housing, and according to the stroke of the swinging link. A third hydraulic cylinder device whose piston is operated to swing is connected to the swing link, and further, the third hydraulic cylinder device moves the first and second hydraulic cylinder devices up and down in opposite directions by the piston operation. The rollers are configured to be in hydraulic communication with each other so that they can be operated in the direction, and the trajectory of the surface of both rollers substantially corresponds to the pass line of the material, and such a configuration is adopted. Even if the material is bent, the material can be effectively passed between the upper and lower cutting blades.

Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The embodiment shown in FIG. 1 has an upper cutter 5 attached to an upper tool rest 4 and a lower cutter 7 attached to a lower tool rest 6. The lower tool rest 6 is fixed to the lower part of the housing 8, and the crankshaft 2 is rotated by a motor (not shown). Then material 1 is sheared.

The housing 8 has swing links 14, 15, 19,
20 or the like, the crankshaft 2 is oscillated in synchronization with the shearing operation by a motor that rotates the crankshaft 2.

In addition to fixed rollers 16 and 24, hanging rollers 9 and 11 are provided on the entrance and exit sides of the housing 8, respectively. These hanging rollers 9 and 11 are suspended by hydraulic cylinders 10 and 12, respectively, and are attached to a chock-type lifting guide 1 provided in the housing 8.
3 allows it to slide up and down. If these hanging rollers 9 and 11 are fixed rollers fixed to the housing 8, the trajectories of the surfaces of the fixed rollers will be as shown by reference numerals 32 and 33 in FIG. In the figure, reference numeral 27 indicates the trajectory of the lower knife 7, 28 indicates the trajectory of the upper knife 5, and 31 indicates the pass line of the material 1. As is clear from this figure, if the hanging rollers 9 and 11 are fixed, it becomes difficult to thread the material 1. On the other hand, moving the suspension rollers 9, 11 up and down using only the hydraulic cylinders 10, 12 so that the surfaces of these suspension rollers 9, 10 always align with the pass line 31 is necessary in accordance with the swinging motion of the shear body. Since the suspension rollers 9 and 11 must be moved up and down, the responsiveness of valve switching is theoretically almost impossible.

Therefore, in the shearing machine according to the present invention, in order to link the vertical movement of the hanging rollers 9 and 11 with the swinging motion of the shear body, a hydraulic cylinder 18 having a piston that is operated to move according to the stroke of the swinging link 14 is used. is connected to a link connecting shaft 17 attached to the swing link 14. Since the piston of the hydraulic cylinder 18 is moved to either side by the stroke of the swing link 14, the oil on the head side 21 of the hydraulic cylinder 18 is mixed with the oil on the head side 22 of the hydraulic cylinder 10 on the inlet side and the oil pressure on the outlet side. When entering the rod side 23 of the cylinder 12, the suspension roller 9 on the entry side is pushed down, and the suspension roller 11 on the exit side is pushed up. Naturally, in this case, pressure is applied to the opposite ports of the respective inlet and outlet hydraulic cylinders 10, 12. Moreover, when the shear body swings in the opposite direction, the operation opposite to the above-mentioned operation is performed, and if the diameter ratio of the hydraulic cylinder 18 and the hydraulic cylinders 10, 12 is appropriately selected, the suspension rollers 9, 11 can be adjusted. The trajectory of the surface always moves along the pass line 31, as indicated by numerals 29 and 30 in FIG. 2, so that the material 1 can be passed through it effectively.

As described above, the pendulum-type running shearing machine according to the present invention can effectively guide and thread even curved materials.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional side view of a pendulum-type running shearing machine according to the present invention, FIG. FIG. 3 is a diagram showing a locus when the hanging roller in FIG. 2 is used as a fixed roller. 1... Material, 2... Crankshaft, 4...
Upper tool rest, 5... Upper tool rest, 6... Lower tool rest, 7...
... lower knife, 8 ... housing, 9 ... hanging roller, 10 ... hydraulic cylinder, 11 ... hanging roller, 12 ... hydraulic cylinder, 18 ... hydraulic cylinder.

Claims (1)

[Claims] 1 An upper cutter attached to an upper tool rest that moves up and down and a lower cutter attached to a lower tool rest connected via a connecting rod to a crankshaft that rotates and drives to shear moving materials. A pendulum-type running shear, which is disposed in a housing and is engaged with a swing link that is operated by the drive source of the crankshaft and swings the housing in synchronization with the vertical movement of the upper cutter. In the machine, rollers for guiding the material, which are suspended by first and second hydraulic cylinder devices, are disposed on the inlet and outlet sides of the material to be sheared with respect to the upper and lower cutters, respectively, and First and second hydraulic cylinder devices are attached to the housing, and lifting guides for guiding both the rollers up and down are installed in the housing, respectively, and a first hydraulic cylinder device in which the piston is operated to move according to the stroke of the swing link is installed in the housing. A third hydraulic cylinder device is connected to the swing link, and the third hydraulic cylinder device is connected to the first and second hydraulic cylinder devices so that the first and second hydraulic cylinder devices can be operated in opposite vertical directions by the operation of the piston. A pendulum-type running shearing machine, characterized in that the rollers are in hydraulic communication with each other so that the surface trajectories of both rollers substantially coincide with the pass line of the material.