FI71083C - ANORDINATION FOER SKAERNING AV SKIVOR - Google Patents

Description

1 71083

Device for cutting plates. - Anordning för skäring av skivor.

The invention relates to a device for cutting plates, in particular for cutting long steel plates in its longitudinal direction, comprising a table for supporting a plate to be cut and a table-related cutting unit with cutting blades. mounted on shafts mounted on the cutting unit, which, above and below the plane of the plate to be cut, extend into engagement with the power-driven rotary transmission members.

Equipment of this type has previously been used as sheet metal cutters, as disclosed, for example, in U.S. Patent Nos. 4,346,635 and 2,777,521, in which a continuous sheet of web is pulled a certain distance to the cutting table, after which a cutting unit moving above the table moves a corresponding distance and cuts . There are several drawbacks and limitations associated with these known devices. They are only suitable for cutting flat strips. The width adjustment possibilities of the strips are also quite limited, as are the widths of the plates to be processed. The plates to be cut must be planar, ie they must not have bent edges or fixed protrusions. The device can only cut in one direction, so sometimes an empty return movement is required (during which the web to be cut is moved forward). In practice, these known devices are not suitable for cutting thicker plates. If a narrower strip needs to be cut from the edge of a thicker plate, the cut must be made in two steps (first on part of the thickness of the plate and then permanently off) to prevent the strip from twisting.

This two-stage cutting capability is not available in devices for stripping continuous sheet metal webs.

2 71083

In known plate cutters, which are used in the engineering industry and which can also cut wedge-shaped and thick steel plates, the length of the cutting blade corresponds to the length to be cut. Such devices are very rugged, heavy and expensive. Nevertheless, their cutting length is limited so that only the largest and most expensive cutters can cut standard plates lengthwise.

The object of the invention is to provide a device for cutting plates of the type mentioned at the beginning, in which device the above-mentioned drawbacks and limitations do not occur.

This object is achieved by a device according to the invention on the basis of the features set out in the appended claims.

In the following, an embodiment of the invention will be described in more detail with reference to the accompanying drawings, in which Figure 1 shows a device according to the invention in cross-section.

Figure 2 shows a top view of a cutting unit belonging to the device.

Figure 3 is a schematic plan view of the cutting table of the device.

Figure 4 shows a detail of the cutting table in a longitudinal section of the table.

The device comprises a cutting unit 1 and an arbitrarily long cutting table 2, on which the cutting unit 1 is supported on rollers 18, 19, 20 by means of guide rails 21 and 22 so that the cutting unit 1 can be moved along the side of the foot 2. As shown in Figs. 1 and 2, the cutting unit 1 Qn is supported on the table 2 by guide rails 21, 22 fixed below the table 2 by rollers 18, 19 in a lever-like support frame so that the rollers 18 remote from the cutting unit 1 roll along the lower surface of the guide rail 21 and the cutting unit 1. the closer roller 19 rolls along the upper surface of the guide rail 22.

The cutting unit 1 comprises disc-shaped cutting blades 4 and 5, the cutting edges of which are suitably adjacent to each other to cut the plate 3 between the blades 4 and 5. The blades 4 and 5 are attached to shafts 6 and 7, which are mounted by bearings 12, 14, 15 on the body of the cutting unit 1 between the side plates 17. Bound between the shafts 6 and 7 is a groove 16 which receives the edge of the plate 3 to be cut. In the case shown, the horizontal width of the groove 16 is of the same order as the width of the table 2.

At the ends of the shafts 6 and 7 are toothed gears 8, of which the lower gear 8 engages a gear 9 at the end of the transmission shaft 10. The transmission shaft 10 has a slide switch 11. The shaft 10 is rotated by a drive motor 36 (Fig. 2) of the same drive motor 36 also a sprocket 37 which engages (not shown) a chain (or rack) extending longitudinally but not moving longitudinally of the table. The chain wheels 38 of the chain is guided around a half turn around the chain wheel 37. As the sprocket 37 rotates, the entire cutting unit 1 moves in the longitudinal direction of the table, and at the same time the blades 4 and 5 rotate at a feed speed corresponding to the speed of movement of the cutting unit 1. The slide switch 11 prevents the feed movement of the cutting unit 1 if the blades 4 and 5 cannot cut.

As the plate thickness changes, it must be possible to adjust the axial distance of the blades 4 and 5. For this purpose, the cutting blade 4 is mounted on its shaft 6 by a backlash bearing 12 provided with a backlash adjusting screw (not shown). The screw 13 can be used to adjust the counter force with which the blade 4 receives a radial cutting pressure which tends to open the chuck 16.

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Since the plates 3 must be firmly attached to the table 2 during cutting, the table 2 is provided with magnetic fastening members 23 at small longitudinal distances. If the device is used for cutting non-magnetic sheets such as plastic sheets, vacuum fastening members can be used.

On the other hand, heavy and long plates must be able to be inserted before cutting. For this purpose, the table is provided with rollers or balls 25 which can be raised and lowered above and below the surface of the table, at which the table top has openings 24. To raise and lower the rollers or balls, the table is provided with the mechanism shown in Fig. 4. The shaft 26 mounted on the frame can be rotated either by handwheel or by machine force, whereby the cranks 27 rotated by the shaft 26 turn the levers 29 around the articulation points 28, moving the rods 30 in their longitudinal direction, i.e. in the longitudinal direction of the table. The sloping surfaces of the slide pieces 31 attached to the rods 30 cause the rollers or balls 25 to be lifted and lowered. The support bearing 32 allows the rollers 25 to rotate in the desired plate transfer direction. When using balls, of course, bearing 32 is not required.

In order not to have to measure the placement of the plates on the table separately, the table is provided with stop stops 35 which can be adjusted in the transverse direction of the table, which are arranged by step motors 33 by means of transfer screws 34. The distance of the stop stops 35 from the cutting line can then be set by means of a numerical setting and / or display device. By adjusting the limiter responses separately, the plate can also be set for cutting wedge-shaped pieces.

Il

Claims (8)

Apparatus for cutting slices, especially for cutting long slats in their longitudinal direction, to which device belongs a table (2) for supporting the plate (3) to be cut and a cutting unit (1) which is connected to the table (1). along with cutting bait (4, 5), which cutting unit (1) is arranged on guide rails (21, 22) movable in the lumbar direction of the table (2) and provided with disc and cutting boards (4, 5) which are located above and below the cutting board. shafts (6, 7) stored in the cutting unit (1) which run above and below the pane of the cutting disk and when engaged with the rotary power transmitting means (10, 9, 8) rotatable by machine power (36), can be characterized in that the cutting beds (4 and 5) are located next to the side edge of the table (2) and the essential parts beyond the cutting unit (1), which leaves the upper side of the table (2), are provided with a in its side facing the table open gap (16), which forms an extension to the table the lateral direction on the side of the cutting table (4 and 5) is received relative to the table for receiving and passing through a strip cut from the disc (3). 2. Apparatus according to claim 1, characterized in that a gear (37) stored in the cutting unit (1), which stares in force transmission engagement with a longitudinal direction in the table, longitudinally movable chain, rack or the like, is arranged to be driven by the same drive motor (36) as the cutting gear's power transfer means (10, 9, 8). 3. Device according to claim 1 or 2, characterized in that said shaft (10, 9, 8) belongs to an axis (10) extending in the direction of the axles (6, 7), on whose outer end there is a gears (9) which engage gears (8) at the outer ends of the bait shafts (6, 7), and which power transmission shaft (10) joins a moving gear (1) to a cutting unit (1) (37). 9 71083 4. Apparatus according to claim 1, 2 or 3, characterized in that one of the cutting beds (4) is stored on its shaft (6) with a clearance (12) provided with a clearance space screw for displacing the bite (4). 4) in relation to the shaft (6), and that a regulating device (13) is arranged between the bearing (12) and the stem of the cutting unit (1), whereby the regular pressing pressure of the bite (4) can be regulated. Device according to any one of claims 1-4, characterized in that the bait shafts (6, 7) and their power transfer means (10, 9, 8) are protected by a lying U-shaped body housing surrounding the gap (16). ) and whose side plates (17) present in the U-plane in the area of the U-bottom are made to their surface area Large in order to receive the forces directed against the bites (4, 5), which aim to open the gap (16). Apparatus according to any of claims 1-5, characterized in that the cutting table (2) is provided in a manner known per se to the rollers and balls (25) of the table surface, which are liftable and lowerable (25) for the boards 3). presetting, that the table has magnetic or compressed air driven fasteners (23) for holding the disc (3) in place during cutting, and that the table (2) has step motors (33) adjustable in the transverse direction of the table (35) whose distance from the cutting line can be set using a numerically controlled setting and / or display device. 7. Apparatus according to claim 1, characterized in that the cutting unit (1) rests on the table (2) with rollers (18, 19) present on the lower side of the table (2) mounted on the lower side of the table (2). , 22) say that the rollers (18) further away from the cutting unit (1) roll along the lower surface of the guide rail (21) and the roller (19) located closer to the cutting unit (1) rolls along the upper surface of the guide rail (22).