FI80226B - SAOGENHET FOER KAPNING AV ARBETSSTYCKEN. - Google Patents

Description

80226

Sawing unit for cutting workpieces

The invention relates to a sawing unit for cutting workpiece pieces, such as plates or plate stacks, for example for sawing plates. The sawing unit comprises a horizontal workpiece support table with a straight elongate slot defining a cutting line and dividing the support table into two separate parts, at least one of which is movable relative to the saw gap to provide a drop space for waste pieces. in the slit, and an elongate trough-like pressing device extending over the length of the cutting line, which is placed on the workpieces on both sides of the cutting line, and a feed pusher for introducing the cutting plate or plate stack into the sawing step.

Sawing of such workpieces in known devices generally takes place by pushing the workpiece into the cutting line under the pressing device with a pusher with gripping pliers. The presser is lowered to the surface of the workpiece, and a piece of waste is sawn from the workpiece by a cutting device, which, after raising the presser, is pushed or dropped onto a waste conveyor below the sawing unit. The workpiece is then pushed the desired distance over the cutting line with a pusher with gripping pliers, the presser is lowered and the workpiece is cut along its entire length. This operation is repeated several times if necessary. As sawing progresses, the workpiece moves from the feed table over the support table and the cutting line to the receiving table, where the sawn pattern is assembled. In principle, equipment such as that described above has been described e.g. German Application Publication No. 27 41 955.

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Problems with the operation of these known devices have been specifically related to the reliable removal of debris or compensating pieces detached from the workpiece from the support table so that the pieces are not left to interfere with the subsequent operation of the equipment.

In the apparatus described in the above-mentioned German application, the removal of the leveling pieces is carried out by dividing the support table into two parts relative to the saw line, which table parts are arranged to be optionally tilted down at the edges on the saw line side. The pieces of waste slide from the tilted table section under the appliance, and further to be transported out.

The operational reliability of this device is based on a sufficiently large angle of inclination of the support table parts so that the pieces of waste actually slide away from the main parts. However, no certification for the removal of pieces of waste is included in the equipment, but it is quite possible that, for example, a resinous or otherwise sticky piece of waste will remain on the inclined main part, where it will cause interference in the next operating phase of the equipment.

Furthermore, the massive tilting table parts which, in their tilted position, constitute an obstacle to the advancement of the product can be considered as a disadvantage of this known apparatus.

German patent publication 31 10 860 discloses a sawing unit solution in which a controlled opening gap is arranged between the support table and the table part receiving the sawn workpieces to remove debris. The pieces of waste are pushed into said gap with a progressive workpiece, whereby there is a risk that parts of the pieces of waste will fall under the advancing workpiece.

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On the other hand, a sheet sawing unit is known from German application publication No. 36 09 331, in which the support table is divided into two parts relative to the sawing line. Of these parts, the feed side is fixed, and the delivery side is fixed from the fixed part horizontally to expand the sawing gap. In this expanded sawing slot, a drilling tool is provided for perforating the sawn sheet edges, for example for hinges, locks and the like of furniture parts.

The sawing unit which is the subject of the invention has specifically sought to solve the problems associated with the removal of debris or compensating pieces sawn from a sheet or stack of sheets from the equipment so that they cannot interfere with the operation of the equipment. This can be achieved with the structural solutions according to the invention, the essential features of which appear from the appended claims.

In the following, the invention will be explained in detail with reference to the accompanying drawings, in which

Figure 1: shows the sawing unit in the drop stage of the workpiece front waste piece,

Figure 2: shows the sawing unit in the step of removing the pliers, and

Figure 3: shows the sawing unit in the step of dropping the rear piece of workpiece.

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Fig. 1 schematically shows a sawing unit with a workpiece W introduced to the cutting line 1 from the feed pushers 9, from which a front waste piece W1 is cut, which is dropped between the run beams B1 and B2 on the waste conveyor 10. The workpiece to be sawn has a fixed support table which is moved by an eccentric 7 rotated by a gear motor. The member 7 for moving the support table part A2 can also be a pneumatically or hydraulically actuated cylinder or other mechanism for producing a linear movement. The movable support table part A2 is supported on the frame beam B2 by height-adjustable support rollers 8 or sliding pieces. In order to drop the front waste piece W1, the pressing device 2 rises and the auxiliary pressing device 3 descends by compressed air, hydraulically or electrically down close to the surface of the support table A2 in front of the front waste piece W1. The movable support table part A2 is pulled out from under the front waste piece W1 when the auxiliary pusher device 3 prevents its movement with the support table part A2. An opening is created in the cutting line 1, from which the waste falls between the frame beams B1 and B2 to the waste conveyor 10. The support table part A2 returns to forming a cutting line 1 with the support table part A1, the auxiliary press device 3 rises and the workpiece w is brought to the new cutting point.

Figure 2 shows the removal of the feed pusher 9 from the workpiece W. In the drawing, the workpiece W is pushed under the cutting line 1 for the last cutting, which is the cutting of the back waste piece.

The pressing device 2 is at the top, the auxiliary pressing device 3 lowers, pressing the workpiece W, whereby the pliers of the feed pusher 9 can be detached from the supported workpiece. The feed pusher 9 is released to retrieve a new workpiece. The pressing device 2 lowers, pressing the workpiece W on both sides of the cutting line 1 and the auxiliary pressing device 3 rises, the workpiece W being cut along the cutting line 1.

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Figure 3 shows the drop of the rear waste piece W2 and the movement of the workpiece W away from the cutting line 1. In the drawing, the rear waste piece W2 on the support table part A1 is cut off from the workpiece W on the support table part A2. The workpiece W is moved away from the cutting line 1 and under the auxiliary pressing device 3 by the movable support table part A2, the cut workpiece w can be freely moved to the next cutting or stacking. The auxiliary press device 3 descends against the frame beam B2 and the rear waste piece W2 is dropped by means of a compressed air, hydraulic or electric waste pusher 5 from the opening between the frame beams B1 and B2 down to the waste conveyor 10. When the split workpiece has moved off the saw blade and the back waste piece W2 is dropped and the auxiliary pressing device 3 is raised, the support table part A2 returns to form a cutting line 1 with the support table part A1.

The main advantage of the invention can be considered that the pieces of waste certainly fall down from the expanding cutting line to the waste conveyor and do not remain on the cutting line. The second, movable half of the support table, which is at the same time part of the receiving table of the sawing unit, moves the workpiece away from the cutting line, which releases the pushers to pick up the new workpiece faster, which increases the capacity of the saw. In addition, a uniform auxiliary press device extending over the entire length of the cutting line can be considered an advantage. The auxiliary press device can be used to hold the workpiece when removing the pushers from the cutting line, and the press device does not need to have openings, which reduces the spread of sawdust generated during sawing to the environment.

In particular, it should be noted that the device according to the invention can be provided with other operating devices and mechanisms, as described above with reference to only one preferred embodiment thereof. However, this is in no way intended to limit the invention to this exemplary character only, but many modifications are possible within the scope of the inventive idea defined by the following claims.

Claims (5)

1. A cutting piece for workpieces such as slices or disc bundles (W), which comprises a horizontal support table (A) for the workpiece, which has a straight elongated slot (1) defining a cutting line, and parts the support table in two separate parts (AI, A2), of which at least one is movable in the relation to the say gap to form a fall space for the residual bits (W1, W2), the equivalent eats returnable back to the say gap, a saw tool (11) is movable in the cutting gap, and an elongate, on both sides relative to the cut line on the workpieces is positionable, along the entire cutting line's longitudinal, annular pressing device (2), and a feeder (9), characterized in that the part (AI) of the support table which is opposite the feed direction is stationary, that the portion (A2) of the support table which lies against the direction of delivery is from the stationary part (AI) vertical means controllable for forming said fall space for the residual bits (W1, W2), correspondingly returnable back to the fixed part (AI), and comprising an additional pressing device (3) which, with substantially vertical, synchronous movements synchronized with the other control functions of the apparatus. above the workpiece (W), adjustable on the workpiece to press it, lowerable to the level of the movable workbench (A2), and lowerable below the level of the movable support table (A2), and one above the fixed support table (AI) disposed extruder (5) for residual bits. 2. A flat as claimed in claim 1, characterized in that the auxiliary pressing device (3) is uniform over the entire cutting length, and advantageously equipped with a uniform rubber strip on its lower surface. 3. A flat as claimed in claim 1, characterized in that the slider (5) for the residual bits is uniform over the entire length of the cutting line (1). 4. A flat as claimed in claim 3, characterized in that the movement of the residual bit projector (5) sweeps the surface of the fixed support part (AI), and extends to the cut-off line (1). An apartment as claimed in claim 4, characterized in that the lower edge of the residual bit projector (5) comprises hooks adapted to follow the travel latch of the feeder (9) formed in the fixed support table (Ai).