JPS6322212A - Method of shearing plate material - Google Patents

Abstract

PURPOSE:To eliminate troubles of bending the leading end of a plate material to aim at preventing noise and at enhancing the accuracy of a product, by separating a movable blade from a stationary blade after the plate material left just after shearing is retracted to a position away from the movable blade. CONSTITUTION:A movable upper blade 3 of a shearing machine 1 shears a plate material 9 gripped by a gripping pawl device 13 positioned in front of the shearing machine 1 in cooperation with a stationary lower blade 7 arranged at the trailing edge of a work table 5. This shearing method comprises the steps of positioning the plate material 9 at a desired widthwise dimension, lowering the movable blade 3 to shear the plate material 9, and thereafter releasing the clamp of the plate material while a numerical control type moving and positioning device 11 is operated to retract the plate material 9 slightly from the movable blade 3. Thereafter, the movable blade is elevated to separate the movable blade 3 from the stationary blade 7. With this arrangement, it is possible to completely remove troubles of bending the leading end of the plate material 9, thereby it is possible to prevent noise from being generated and to enhance the accuracy of a product.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for shearing plate materials, and more specifically, the present invention relates to a method for shearing plate materials, and more specifically, a method for retracting the remaining plate material immediately after shearing to a position away from the movable blade, and then fixing the movable blade. This invention relates to a method of shearing a plate material that is separated from the blade.

[Technical background of the invention and problems with conventional methods] Conventionally, when shearing a sheet from a wide sheet to a narrow sheet one after another using an automatic sheet movement and positioning device to move the sheet to the shearing position, the remaining The movable blade was separated (also called open) from the fixed blade while the plate remained stopped at the pre-shearing position of the automatic plate moving and positioning device.

In this case, the shearing work involves a slight rolling action, so as the movable blades move apart, the sheared surface of the remaining material is forced to move in the direction of separation, causing it to bend between the temporary press of the shearing machine and the sheared surface. A phenomenon was occurring.

When such bending occurs, the tip of the movable blade hits the fixed blade when shearing the remaining material the next time, causing the inconvenience that the shearing dimension becomes inaccurate due to the generation of wrinkles in addition to the accompanying sound. There was.

[Purpose of the invention]

An object of the present invention is to overcome the disadvantages of the conventional shearing methods described above.

[Summary of the invention]

In the present invention, the plate material remaining immediately after shearing is evacuated to a position above the movable blade, and then the movable blade is separated from the fixed blade.

[Embodiments of the invention]

In the embodiment shown in FIG. 1, the movable upper blade 3 of the shearing machine 1 cooperates with the fixed lower blade 7 provided at the edge of the work table 5 to numerically control the plate material 9 placed in front of the shearing machine 1. The plate material 9 gripped and positioned by the gripping claw device 13 of the type automatic movement positioning device 11 is sheared to a desired width dimension.

Shown inside the shearing machine 1 in FIG. 1 is a stacking device 15 for sheet products sheared by the shear R1, the details of which will be described later with reference to FIGS. 5 to 9.

In the shearing method according to the embodiment of the present invention, first, the movable blade 3 is moved backward from the cutting edge of the fixed lower blade 7 by a desired shearing width dimension as shown in FIG. Place it in a protruding position.

Of course, in this state, the plate material 9 is pressed and fixed to the upper surface of the work table 5 by a plate holding device (not shown).

Next, as shown in FIG. 3, the movable upper blade 3 descends and the plate material 9
is sheared into a desired width dimension by the cooperation of the movable upper blade 3 and the fixed lower blade 7.

Next, as shown in FIG. 4, the plate holder is loosened and the numerically controlled movement positioning device 11 is activated to move the plate 9 slightly away from the movable upper blade 3 and retract it.

Thereafter, the movable upper blade 3 is raised, or in other words, the movable upper blade 3 is separated from the fixed lower blade 7.

The sheet product accumulating device 15 shown in FIG.
A plate product sheared from a plate 9 that protrudes backward (to the left in Fig. 1) by a desired dimension from the fixed lower blade 7 shown in the figure is transferred to a belt conveyor 17 (see Fig. 1) in the longitudinal direction of the shearing blade. It is carried and installed in the apparatus constructed from the right side of FIG.

That is, the product plate material is carried in the direction of arrow A and fed onto the receiving shelf 19.

The above-mentioned receiving shelf 19 consists of two parts that straddle guide rails 23 and 23 provided on the inside of the member in the board material carrying direction of the frame body 21, which is assembled into a cross-shaped structure by appropriately combining shaped steel and the like. is a plurality of bullet-shaped rollers 2 as shown in FIG.
5 is a provision.

Of course, the tip of the bullet-shaped roller 25 is directed toward the loading side of the plate product, and the two receiving shelves 19 are connected to the piston rod 29 of the fluid pressure cylinder 27 provided in a part of the frame 21.
The above-mentioned guide rail 23 of the above-mentioned frame 21 is connected to the top and bottom of the chino 33 which is driven by the temperature and moves cyclically between the °C sprockets 31 by connectors 35 and 35, so that the two pieces can be opened and closed simultaneously symmetrically around the center. A second sprocket 37 is provided on the outside of the member to which the second chain 41, 41 is driven by an electric motor 39 such as a pulse motor with a brake shown in FIGS. 6 and 7.
(See Figure 6) are the top and bottom cheno guides 43.4
It moves circularly supported by 3.

Below the frame body 21, as shown in FIGS. 6 and 7, a second guide rail 45 is connected to the guide rail 2 described above.
It is provided on a stacking table 47 lower than 3 in a direction parallel to the guide rail 23.

The second guide rail 45 is provided with four sets of movable platforms 51 that are movable via four linear motion bearings, and a connecting beam 53 that connects the two sets in the direction in which plate products are carried in is connected to the second chain. It is provided on the outside of 41.

The two connecting beams 53 include one connected to the outer side of the second chain 41 and the other connected to the lower side. The connecting beam 53 can be freely positioned by moving toward and away from the center line symmetrically.

Also, a pusher plate 5 that presses the side surface of the stacked plate material via a small fluid cylinder 55 near both ends of the inner surface of the connecting beam 53
7 is provided, and as shown in FIG.
Organize the accumulation of board products.

Moreover, as is clear from FIG. 5.6.7, the mobile trolley 5
1, a centering plate 63 is provided so as to surround the receiving shelf 19 with connecting members 61 extending upward on both sides of the ceno guide 43.

Note that the centering plate 63 is used to center the sheared board product on the receiving shelf 19 and then lowering it onto both receiving shelves 1.
9 is opened and the plate products are dropped onto the accumulating cart 59, a cut groove 65 (
(See Figure 6) is provided.

The one shown below the bumper plate 57 in FIG. 6 shows the state in which the five stacking carts are lowered after the plate products 65 that have been piled up on the stacking cart 51 have been tidyed up using the bumper plate 57 described above. This is what is shown.

The operation of the plate product stacking device 15 described above is already clear, but to give a brief supplementary explanation, the electric motor 39 is driven to separate the centering plate 63 and the butcher plate 57 according to the shear width of the plate products to be stacked. Set face-to-face intervals.

Next, hold the plate products up to a predetermined number, such as 10, on the receiving shelf 1.
9, the fluid pressure cylinder 27 is operated to open the center of the pair of receiving shelves 19 and placed on the accumulation cart 59, and both sides of the shear width are tidyed up with the butcher plates 57, and then in preparation for the subsequent accumulation. This reduces the height of the collection cart.

Although the explanation has been omitted, during the above operation, a large number of sensors are provided to detect the arrival of plate products, the arrival of a predetermined number of sheets, etc., and issue a command to proceed to the next operation.

〔Effect of the invention〕

The shearing method of the present invention is as described in the claims, and by performing the shearing operation using this method, even if a numerically controlled plate moving positioning device is used to shear, the tip of the plate can be moved by the movable upper blade. By separating the blade from the fixed lower blade, the inconvenience of bending can be completely eliminated, and noise generation can be prevented and product accuracy can be improved.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the method of the present invention, FIG. 2 is a diagram before the start of the method, FIG. 3 is a diagram immediately after shearing, and FIG. 4 is a diagram showing a state in which the remaining material is separated from the movable blade. Fig. 5 is a plan view of a plate product accumulating device attached to a shearing machine embodying the present invention, Fig. 6 is a sectional view taken along the line ■-■ in Fig. 5, and Fig. 7 is a left side view of Fig. 5. , Figure 8 shows ■-■ in Figure 6.
FIG. 9 is an enlarged cross-sectional view taken along the line IX-rX in FIG. 8.

Claims (1)

[Claims] A method for shearing a plate material, which comprises retracting the plate material remaining immediately after shearing to a position away from the movable blade, and then moving the movable blade away from the fixed blade.