DE202020005327U1 - Unit for cutting material, optionally standing or rotating cut - Google Patents

Abstract

Shear unit for cutting material to length by means of hydraulic infeed of the shear blades

Description

Problem:

The rotating shears on the market are operated in start-stop mode, i.e. the shearing units are accelerated and then braked again. For this purpose, high drive powers are required to accelerate the rotating body and powerful brakes to bring the rotating mass to a position-defined standstill.

Problem:

With the innovation applied for for protection, there is the option of cutting the clippings both in a continuous process and "standing".

Solution:

As described above, this problem is solved with our part requested for protection.

Achieved advantages:

With the invention it is achieved that very high throughput speeds can be run without having to reduce them for the cut - or even interrupt the feed.

List of reference symbols

1

Knife carrier

2 - 2.3

Spur gear

3

Clamping set

4th

Screw-in cartridge "cylinder with anti-twist knife"

5

Drive unit (spur gear, stub shaft, motor)

6th

Bearing housing

7th

Hydraulic power pack

8th

Rotating union

9

Venting

10

Wire (cut example)

H

Hub

The rotating scissors of a material handling and processing plant accelerate and the peripheral speed is kept close to the feed speed. When a cutting command is given, the speed is reduced or increased by means of the control and synchronized with the feed so that the knives hit the predetermined cutting point and cut the cut material to the selected length.

The two knife carriers ( 1 - 7th .1; Item 1 ) "Upper and lower knife", which are located in the bearing housings ( 1 - 4th ; Item 6th ) are located by means of spur gears ( 1 - 7th .1; Item 2 - 2.3 ) connected to obtain counter-rotating synchronous operation. Due to the structure and connection of the spur gears with the knife carrier by means of clamping sets ( 1 + 3.1; Item 3 ), the spur gears ( 1 - 7th .1; Item 2 - 2.3 ) are connected so that there is no backlash and the unit therefore runs "free of play".

The clippings ( 1 - 7th .1; Item 10 ) runs through the center of the cutting unit, ie the knives cannot be rigidly attached to the knife carrier, as otherwise only the circumference (at the cutting edges) can be cut. For this reason the knives are in the screw-in cartridges ( 1 , 3 , 5 - 7th .1; Item 4th ) for extending and retracting.

The extension as well as the counter hold (higher than the cutting force) during the cut is carried out hydraulically. At low throughput speeds, the blades are retracted by means of spring force; at high throughput speeds, the reset is also done hydraulically.

The hydraulic fluid is supplied centrally via rotary feedthroughs ( 1 - 4th ; Item 8th ) and drill channels to the screw-in cartridge ( 1 , 3 , 5 - 7th .1; Item 4th ) directed. This cartridge is designed as a single-acting cylinder with spring return and venting ( 1 , 3 , 5 - 7th .1; Item 9 ) at low throughput speeds or by means of further rotary feedthroughs as differential cylinders. The cutting blades in this unit are secured against rotation and can be readjusted (regrinding in the event of wear).

The required cutting or counter-holding force is applied via the piston surface in connection with the pressure of the hydraulic unit. Since only 1/3 of the cross-section is cut (+ 2/3 break), the feed speed supports the cutting process.

To trigger the cut in connection with the length determination, the feed rate and the circumferential speed are transmitted to the control via pulse generator / resolver.

• Der Drahtvorschub wird aktiviert, zeitgleich schaltet sich die rotierende Schere bei. Nach Umrechnung der Daten in Bezug von benötigter Drahtlänge zum Umfang der Schereinheit wird die Drehzahl der Rotationskörper reduziert oder erhöht und auf die Vorschubgeschwindigkeit synchronisiert, damit die Messer das Schneidgut an der vorgesehenen Stelle trennen.
• Die Messer sind bei dieser Prozedur eingefahren. Steht der Schnitt an, wird die Hydraulik zugeschaltet sobald das „Obermesser“ auf 17 Uhr und das „Untermesser“ auf 13 Uhr steht (7). Zeitlich haben die Messer eine Wegstrecke von 330° um auszufahren, danach erfolgt der Schnitt. Danach fahren die Schermesser durch Federkraft oder hydraulisch zurück an den Ausgangspunkt in der Einschraubpatrone.
• Ferner kann ein stehender Schnitt mit dieser Einheit getätigt werden. Die Abfolge - „Obermesser“ steht auf 18 Uhr, „Untermesser“ auf 12 Uhr. Nach dem Erreichen der benötigten Drahtlänge wird der Vorschub entkoppelt und die Hydraulik beigeschaltet. Nach dem Schnitt erfolgt die Rückfahrt der Messer wie bereits vorstehend beschrieben. Die Rotationskörper drehen sich bei dieser Schnittart nicht.

In detail as follows:

• The wire feed is activated and the rotating shears are activated at the same time. After converting the data in relation to the required wire length to the circumference of the shearing unit, the speed of the rotating body is reduced or increased and synchronized to the feed speed so that the knives separate the material to be cut at the intended point.
• The knives are retracted during this procedure. If the cut is pending, the hydraulic system is switched on as soon as the "upper knife" is at 5:00 p.m. and the "lower knife" is at 1:00 p.m. 7th ). In terms of time, the knives have a distance of 330 ° to extend, after which the cut takes place. Then the shear blades move back to the starting point in the screw-in cartridge by spring force or hydraulically.
• A standing cut can also be made with this unit. The sequence - "upper knife" is at 6 pm, "lower knife" at 12 o'clock. After the required wire length has been reached, the feed is decoupled and the hydraulics are switched on. After the cut, the knives return as described above. The bodies of revolution do not rotate with this type of cut.

Figure list

• 1 Cut in the direction of passage, knife retracted
• 2 View against the wire running direction, knife retracted
• 3 Cut in the direction of passage, knife extended
• 4th View against the wire running direction, knife extended
• 5 Side view with partial cut, knife retracted, upper knife at 7 o'clock, lower knife at 11 o'clock
• 5 .1 side view with partial cut, knife extended - ready to cut, upper knife at 7 o'clock, lower knife at 11 o'clock
• 6th Side view with partial cut, knife retracted, upper knife at 6 o'clock, lower knife at 12 o'clock
• 6th .1 side view with partial cut, knife extended - cutting position, upper knife at 6 o'clock position, lower knife at 12 o'clock
• 7th Side view with partial cut, knife retracted, upper knife at 5 o'clock, lower knife at 1 o'clock
• 7th .1 side view with partial cut, knives extended, upper knife at 5 o'clock position, lower knife at 1 o'clock

Claims (2)

Shear unit for cutting material to length by means of hydraulic infeed of the shear blades Suitable for standing or rotating cuts

Images