JPH0242609B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shearing machine, and more particularly to a shearing machine with a shear droop prevention function.

First, the shear droop in conventional shearing machines will be explained.

The shearing machine 1 shown in FIG. 1 has a fixed lower blade 5 attached to a lower machine frame 3, and a movable upper blade 11 mounted on a slide 9 guided by an upper machine frame 7 and lowered by fluid pressure or mechanically driven. is provided.

An industrial shearing machine 1 that mainly shears metal plates such as iron plates is always equipped with a rake angle θ, and the rake angle θ varies depending on the thickness of the plate to be sheared.
is adjustable.

The back gauge 13, clearly shown in FIG. 2, is of a type that rises and falls integrally with the slide 9, and is moved and positioned by a screw rod 15 left and right by numerical control. Also, fluid pressure cylinder 1
7 and swings up and down around the shaft 19 to change the height position.

FIG. 2 shows a state in which the movable upper blade 11 is stopped at the upper limit, and the lower surface of the back gauge 13 is at the same level as the upper surface of the fixed lower blade 5.

A belt conveyor 21 attached to the lower machine frame 3 is provided below the back gauge 13. The upper surface of the annular belt 23 of the belt conveyor 21 is also at the same level as the upper surface of the fixed lower blade 5 when the movable upper blade 11 is stopped at the upper limit.

Insert the plate material 25 to be sheared from the front past the fixed lower blade 5 in the state shown in FIG. Shear.

In this case, if the back gauge 13 is lowered together with the slide 9 as shown in the figure, the back gauge 13 will first press down on the annular belt 23.

In machines where the back gauge 13 is attached to the upper machine frame 7, the back gauge does not descend, but the slide 9
interferes with the front roller 27 of the belt conveyor 21, so the belt conveyor 21 must be lowered simultaneously with the start of shearing.

Let's move on to the explanation of FIGS. 3 and 4.

As explained in FIG. 2, the plate material 25 is being sheared.
is floating cantilevered in the air on the rear end side, and there is nothing to support it from below.

Therefore, as shown in FIG. 3, when shearing progresses from the left side (from the lower movable upper blade side on the left side in FIG. 1), for example, when the uncut portion reaches 10% of the total shear length, the plate material 25 The rear end will sag under its own weight.

As is clear from 2 in FIG. 4, the movable upper blade 11 hangs further away from the upper blade than the downward bending due to its own width.

Since this sag occurs both in the shearing direction and in the direction orthogonal to the shearing direction, the longer the plate material is extended and closer to the end, the wider the product can be obtained as shown at the bottom of FIG.

Conventionally, a mechanism as shown in FIG. 5 has been used to solve the above-mentioned disadvantages.

That is, a disk-shaped support 29 that supports the product from below is placed at the position where the shearing ends, using a rod 31 and a spring 3.
3. It is slidably provided on the bracket 37 together with the stopper 35, and the plate material 25 is held between the movable upper blade 11 and lowered integrally with the movable upper blade 11.

This mechanism can prevent sag in the direction shown in 1 in Figure 5 for objects with small dimensions in the shear depth direction (back gauge direction), but the sag still occurs on the shear start side shown in 2 in Figure 5. I was unable to prevent it from moving away from the movable upper blade.

FIG. 6 shows that even if the shearing machine has a structure in which the back gauge 13 is attached to the upper machine frame 7 and does not descend during shearing, the end of the sheared product sheet material will be movable unless the front roller 27 of the belt conveyor 21 is lowered. This shows that the inconvenience of being bent by the blade 11 occurs.

The present invention has been devised to solve the above-mentioned disadvantages of the conventional device, and preferred embodiments thereof will be described in detail with reference to FIGS. 7 to 12.

The shearing machine 1 of the embodiment device of the present invention includes:
A belt conveyor 21 for discharging sheared material mounted on a trolley 39 is provided in a gate-shaped space formed by a lower machine frame 3 and an upper machine frame 7 of the machine so that it can be inserted into and removed from the rear.

Assuming that the movable upper blade has an upward rake angle θ to the right when viewed from the front of the shearing machine 1, the two right support legs 41, 41 are connected to hydraulic cylinders 43, 43 fixed on the cart. The piston rods 45, 45 have one side of a roller pedestal 47 assembled, for example, in a cross-shaped structure, supported at their upper ends so as to be swingable around a shaft 49.

On the other hand, the left support legs 51, 51 are equipped with hydraulic cylinders 55, 55 and their piston rods 5, which are swingably mounted on the upper part of the truck 39 around shafts 53, 53.
7 and 57, and is also connected to the roller support 47 assembled in the above-mentioned double crossbeam by shafts 59 and 59.

The roller abutment 47 has two
Book rollers (front roller 27 and rear roller 63)
is encircled by an annular belt 23, which is driven by an electric motor 65 and a belt 67 as shown in FIG.

The bracket 61 of the front roller 27 is attached to a slide base 71 which is movable in the front and back direction by a fluid pressure cylinder 69 shown in FIG. 7, and can tension or loosen the annular belt 23.

The front roller 27 of the roller support 47 assembled on the parallel girder
Protrusions 73 and 75 are provided on the left and right in the vicinity, and plates 77 and 79 that receive pressure from a pusher, which will be described later, are attached.

As shown in FIG. 8, the rear left side of the slide 9 to which the movable upper blade is attached is rotated numerically by an electric motor 81 such as a servo motor, a worm gear 83, an elongated worm wheel 85, etc., and is driven by a screw. A pusher 87 is provided that can be moved up and down.

There is also a worm gear 91 on the left side via a spline sleeve 89, and a pusher 95 with an elongated worm wheel 93 is provided depending thereon.

Pin 97 attached to spline sleeve 89
When pushed to the left in Fig. 8, the worm gear 91
The connection between the shaft and the shaft of the electric motor 81 is released.

The operation of the apparatus according to the embodiment of the present invention described above will be explained below with reference to the fluid pressure piping diagram shown in FIG.

The shearing machine 1 of this embodiment has a mechanism in which a back gauge 13 is lowered integrally with a slide 9 that holds a movable upper blade 11.

In addition, the back gauge 13 has a plate material 25 inserted from the front beyond the fixed lower blade 5.
When the upper surface of the annular belt 23 of No. 1 is pushed backward, it is in a horizontal state in close contact with the upper surface of the annular belt 23 so as not to pass under the back gauge 13.

Further, as shown in FIGS. 1 and 2, the movable upper blade 11 and the fixed lower blade 5 are positioned and fixed to the plate material 25 in a state where they are separated in the vertical direction even at the left end where they are closest to each other.

Therefore, when the movable upper blade 11 begins to descend, the back gauge 13 applies downward pressure to the annular belt 23.

In this embodiment, the device not only uses the fluid pressure cylinder 17 to swing the back gauge 13 around the shaft 19 and move it upward, but also operates the fluid pressure cylinder 69 to move the slide base 71 backward and move the annular belt 23 upward. It is equipped with a mechanism for relaxing it as shown by the two-dot chain line in Figure 7.

As the lowering of the movable upper blade 11 further progresses, the left pusher 87 moves against the left plate 7 of the roller support 47.
7, the roller support 47 operates the relief valve 99 shown in FIG. Only the left side is lowered by the swing of the radius R shown in FIG.

FIG. 12 shows a state in which only the left supporting legs 51, 51 of the rear roller 63 and the front roller 27 are lowered.

As the shearing progresses, the front and rear rollers 27 and 6
3 has a strong downward slope to the left, and when it advances to a line parallel to the slope of the lower end surface of the movable upper blade 11 connecting the tips of the left and right pushers 87 and 95 shown by two-dot chain lines in FIG. Right protrusion plate 7
It comes into contact with 9.

From this point on, the movable upper blade 11 and the front roller 27
means a plate material 25 sheared through an annular belt 23
while holding the right side fluid pressure cylinder 4.
3 also starts to descend while releasing pressure oil from the relief valve 101, and the entire roller support 47 continues to descend until the shearing is completed.

When the shearing is completed and the slide 9 rises to return to the upper limit, the solenoid SOL shown in FIG.
At the same time, the fluid pressure cylinder 69 is actuated to tension the annular belt 23 to align the upper surface of the annular belt 23 with the upper surface of the fixed lower blade, and the electric motor 65 is driven to transport the sheared plate material 25 backward. do.

By the way, when the thick plate material 25 as shown in FIG. 10 is sheared with the height of the pusher 87 shown in FIG. It will start from.

In other words, the line parallel to the lower surface of the movable upper blade 11 (two-dot chain line) connecting the lower ends of the pushers 87 and 95 shown in FIG. A problem occurs in which the lowering timings of the belt 23 do not match.

In this case, while the spline sleeve 89 remains in the state shown in FIG. 8, the electric motor 81 is driven to simultaneously lower the left and right pushers 87 and 95 by the same amount to achieve the above-mentioned timing alignment.

If the rake angle θ is changed by changing the thickness of the plate material to be sheared, the pin 97 of the spline sleeve 89 is actuated to disconnect the right worm gear 91 and the electric motor 81, leaving only the left pusher 87. By changing the vertical position of the pushers, the line connecting the tips of the left and right pushers is corrected so that it is parallel to the lower surface of the movable upper blade 11.

The apparatus of this embodiment described in detail above supports the plate material over a wide range behind the plate material to be sheared by a belt conveyor for carrying out, tilts the plate material in accordance with the timing of the progress of shearing, and in the final stage of shearing, the plate material is Since the movable upper blade and the upper surface of the belt conveyor hold the sheared material and lower it further, the inconvenience of the conventional device in which the sheared plate material sags in the left and right and front and rear directions can be completely eliminated.

[Brief explanation of the drawing]

Figure 1 is an explanatory front view of the shearing machine, Figure 2
The figure is a side view of the same as above, Figure 3 is a plan view explaining the shape of the sheared plate material, Figure 4 is an illustration of droop during shearing, Figure 5 is an explanatory diagram of the conventional droop prevention device, and Figure 6 is the conventional droop prevention device. FIG. 7 is a side view of the apparatus according to the embodiment of the present invention, FIG. 8 is a rear view of the same as above, FIG. 9 is an explanatory diagram for shearing a thin plate, and FIG. 10 is a thick plate. FIG. 11 is a partial hydraulic piping diagram, and FIG. 12 is an explanatory diagram of the tilted state of the rear roller. Explanation of the symbols representing the main parts of the drawings: 1... Shearing machine, 5... Fixed lower blade, 11... Movable upper blade, 21... Belt conveyor, 47... Roller support, 49... Shaft, 87... ...Pushiya, 95
... Pusher, 99 ... Relief valve, 10
1...Relief valve.

Claims (1)

[Claims] 1 Adjustable pushers are provided hanging on the outside of both ends of the movable upper blade so that the straight line connecting the lower ends is below the movable upper blade and parallel to the lower edge of the upper blade, and before shearing, the pushers are horizontal with the upper surface of the fixed lower blade. A plate that engages with the pusher is provided on both outer sides of the roller shaft of the roller support of the sheared material conveyor located at the upper surface position, and the roller support has a swinging mechanism in which only one of the roller supports is lowered by the pusher. A shearing machine characterized in that it is further provided with a mechanism that allows the entire conveyor to be lowered by lowering the movable upper blade.