JPH0246995A - Plate working machine - Google Patents

Abstract

PURPOSE:To lift a slide by just one piece of driving cylinder by connecting the flexion points of respective toggle mechanisms by a tension arm and transversely moving the mechanisms. CONSTITUTION:The respective toggle mechanisms A are deep in flexion angle and are in a contracted state and a slide 8 is up when a piston rod 21 is in a retraction position. A long-sized plate such as steel plate is placed in this state on a lower die 5 and a hydraulic cylinder 20 is actuated to push out the tension arm 18 by means of the rod 21. Respective pins 15 are pushed in this way and the flexion angle of upper and lower links 14 is shallowed, by which the toggle mechanisms A are extended and the slide 8 is lowered. The long-sized plate is then bent by an upper die 10 and the lower die 5. The slide 8 can, therefore, be lifted by just one piece of the hydraulic cylinder 20. Since the toggle mechanisms A driven by the cylinder are extremely simple in construction, the mechanisms are trouble-free and since one piece of the cylinder is necessitated, the production cost is low.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plate processing machine for bending or cutting metal plates such as steel plates.

[Conventional technology]

In conventional plate processing machines, such as hydraulic brake presses or shearing machines, a slide is raised and lowered by a pair of left and right hydraulic cylinders or more than one hydraulic cylinder, and the upper mold or upper blade attached to this slide and the upper die on the lower table are Bending or cutting of plate material is performed using the lower die or lower blade.

[Problem to be solved by the invention]

Since it is difficult to synchronize the actions of the respective hydraulic cylinders in the above-mentioned hydraulic plate processing machine, there is a problem in that the slide descends while tilting.

Although the above-mentioned problems are almost solved by installing a balance device, there is a problem in that a plurality of hydraulic cylinders are required and, in addition, a balance device must be provided, which significantly increases the cost of the device.

[Means to solve the problem]

In order to solve the above problems, the present invention connects the upper frame located above the slide and the slide using a plurality of toggle mechanisms, and connects the bending points of each toggle mechanism with a tension arm. The slide is configured to move vertically in parallel with the lateral movement of the tension arm, and is provided with a drive cylinder for lateral movement of the tension arm.

[Effect]

Since the device of the present invention has the above configuration, each toggle mechanism is bent to raise the slide when the tension arm is moving toward the drive cylinder.

When the slide is rising as described above, if a plate material is placed on the lower mold or lower blade below it, and then the tension arm is pushed out by the drive cylinder, the bending point of each toggle mechanism is pushed, and each toggle mechanism is pushed out. The mechanism extends.

The upper end of the toggle mechanism is a fixed point, and the lower end is connected to the slide, so when the toggle mechanism is extended, the slide lowers, and the upper die or upper blade fixed to this slide,
The plate material is bent or cut by the lower die or lower blade.

After the above machining is completed, the tension arm is retracted to its original position by the drive cylinder, and the slide is raised to return to its original state.

〔Example〕

FIGS. 1 and 2 show the present invention applied to a brake press for bending plate materials.

In the brake press shown in this figure, reference numeral 1 indicates left and right frames. A plate-shaped lower frame 2 is fixed between the lower parts of both frames 1.

Reference numeral 3 denotes small screw jacks mounted on the lower frame 2 at appropriate intervals. A lower stand 4 is placed on each of the screw jacks 3, and a lower mold 5 is fixed on the lower stand 4.

Reference numeral 6 denotes holder receivers fixed to opposing sides of both frames 1, and both ends of the lower table 4 are fixed to these holder receivers 6.

Reference numeral 8 denotes a slide, and this slide 8 moves up and down along guide rails 9 provided on opposing sides of the left and right frames 1, and an upper mold 10 is fixed to its lower end.

An upper frame 11 is fixed between the upper ends of the left and right frames 1, and this frame 11 and the slide 8 are connected by a pair of left and right toggle mechanisms A.

Each toggle mechanism A has one end of the upper and lower links 14 connected so as to be freely bendable by a pin 15 serving as a bending point, and the other end of each link 14 connected freely to the slide 8 and the upper frame 11 through a pin 16 so as to be freely rotatable. be.

18 is a tension arm, and this arm 18 is connected to the bending point of each toggle mechanism by the bin 15.

A hydraulic cylinder 20 is attached to one frame 1, and its piston loft 21 is connected to the tension arm 18.

In the case of the above embodiment, the piston loft 21 as shown in FIG.
When is in the retracted position, each toggle mechanism A has a deep bending angle and is in a contracted state, and the slide 8 is raised.

In this state, when a long plate such as a steel plate is placed on the lower mold 5 and the hydraulic cylinder 20 is operated to push out the tension arm 18 with the rod 21, each bin 15 is pushed and the bending angle of the upper and lower links 14 becomes shallower. and the toggle mechanism A extends,
The slide 8 descends and the upper die 10 and lower die 5 bend the long plate.

Thereafter, when the loft 21 is retracted by the action of the cylinder 20, the original state shown in FIG. 1 is restored.

By keeping the distance between each bottle 15 and pin 16 constant, the slide 8 moves up and down in a parallel state, and the small screw jack 3 is operated appropriately to give the lower mold 5 a medium-high reverse serration. This enables bending without center wobbling.

FIG. 3 shows an example implemented in a shearing machine, in which the lower blade 7 is fixed to the lower frame 2 and the upper blade 12 is fixed to the slide 8.

Other mechanisms and operations are the same as the embodiments shown in FIGS. 1 and 2.

That is, when the slide 8 is in the raised position as shown in Figure 3, a material such as a steel plate is placed on the lower blade 7, the piston rod 21 is pushed out by the drive cylinder 20, and the slide 8
is lowered to cut the material, and then the piston rod 21
, and raise the slide 8.

FIG. 4 shows an example in which three sets of toggle mechanisms A are used.

By using three or more sets of toggle mechanisms A in this manner, it is possible to accommodate a long slide 8.

In this case as well, the other mechanisms are the same as the examples shown in FIGS. 1 and 3, so their explanation will be omitted.

〔Effect of the invention〕

As described above, the device of this invention connects the upper frame located above the slide and the slide using a plurality of toggle mechanisms, and connects the bending points of each toggle mechanism with a tension arm. Since the slide is configured to move vertically in parallel by horizontal movement and is provided with a drive cylinder that moves the tension arm laterally, the slide can be raised and lowered using only one drive cylinder. Further, since the toggle mechanism driven by a cylinder has an extremely simple structure, there are few failures, and since only one cylinder is required, the manufacturing cost is low.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the first embodiment of the processing machine of this invention;
FIG. 2 is an enlarged side view with a portion of the same as above, FIG. 3 is a front view of another embodiment, and FIG. 4 is a front view of a third embodiment with a portion omitted. 4...Lower stand, 5...Lower mold, 7...Lower blade, 8...Slide, 10...Upper mold , 11...
... Upper frame, 12... Upper blade,
14...Link, 15.16...Bin, 18...Tension arm, 20...Hydraulic cylinder, 21...Piston rond, A...Toggle mechanism. Patent applicant Yudo Hisashi Yamashina Agent Aya Kamata Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) In a processing machine that processes plate materials with an upper processing tool attached to the slide and a lower processing tool attached to the lower stand, the upper frame located above the slide and the slide are connected by multiple toggle mechanisms. In addition, the bending points of each toggle mechanism are connected by a tension arm, and the slide is vertically moved in parallel by the lateral movement of the tension arm, and a drive cylinder for lateral movement of the tension arm is provided for plate processing. Machine.