DE2411266A1 - METHOD AND DEVICE FOR SEPARATING SUCCESSIVE INDIVIDUAL LENGTH SECTIONS FROM FERROMAGNETIC MATERIAL - Google Patents

Description

Patent attorneys

Dipl. Ing. C. Wallach

Dipl. Ing. G. Koch

Dr. T. Haibach March 8, 1974

8 Munich 2
Kauf! Ngerstr. 8, Te! .24O275 l4 582 -

British Steel Corporation London / England

Lamberton and Company Limited Coatbridge / Scotland

Method and device for separating successive individual lengths of ferromagnetic material

The invention relates to a method and a device for separating successive individual length sections made of ferromagnetic material from a group of length sections made of such material and in particular on one magnetic separating device for separating or untangling a number of lengths of ferromagnetic material « such as pre-rolled steel blocks, bars or other rolled sections »

When handling such lengths it often happens that a number of these lengths are jumbled together becomes, i.e. that they cluster together and on top of each other are stacked and are only approximately parallel and it may then be necessary to separate them. Any length segment can be too heavy to remove easily by hand and it may be desirable to have certain mechanical

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directions to provide «around one or more length sections per unit of time to be removed from the thrown together group and separated for further processing or handling to interpret.

According to the invention, a device for separating lengths of ferromagnetic material is created, which has a substantially horizontally arranged, axially rotatable elongated carrier part "which has at least two magnetic poles, which are aligned in the same way and van. the support part project radially outward, guide means with a smooth curved contact surface outside the support part, which define a path which extends from a side of the support part adjacent to the rotational path of the magnetic poles over the axis of the support part, means for pushing a group of length sections comprises ferromagnetic material laterally in the direction of and against the contact surface of the .Fuehreinrichtung on one side of the support part and motor means for continuous axial rotation of the support part with the associated magnetic poles, so that a length of ferromagnetic material, which is pushed against the contact surface and on the magnetic poles are magnetically attracted, lifted off the group of length sections on the smooth curved contact surface and brought to the other side of the carrier part.

The abutment surface can be formed from a continuous magnetically permeable plate or sheet metal, or it can be provided with openings above the magnetic poles. The plant surface can also be reduced to its essential elements by having two or more very narrow surfaces in shape be provided by bent rods or the like, which of the relatively rigid length sections of ferromagnetic Material can be bridged. The surface can also be stationary or freely rotatable, or it can be attached to the support member

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attached and rotatable with this. In the latter case which is preferred, the contact surface of the guide devices is formed by disks on the carrier part.

According to this preferred embodiment of the invention, a Device created, which is a substantially horizontally arranged axially rotatable elongated support part, the at least two axially spaced discs or the like and has at least two magnetic poles «which are similar are aligned and protrude radially outward from the carrier part up to a distance from its axis which is not greater as the radius of the disks, means for pushing a group of lengths of ferromagnetic material laterally towards and against the edges of the disks on one side of the support part, motor means for the continuous axial rotation of the support part with the associated Discs and magnetic poles such that a to the. Pane edges abutting and magnetically attracted in the direction of the magnetic poles length section of ferromagnetic material to the Disc edges is lifted off at the group of length sections and brought to the other side of the carrier part, and means for detaching the length section from ferromagnetic Material comprised by the disc edges on the other side of the carrier part.

If the contact surface is formed from disks, these must not be solid, but they must have smooth edges, which are rigid enough to withstand the forces exerted by the lengths of ferromagnetic material pressed against them Material exerted, as well as the weight of the length sections, which is due to the magnetic attraction to the magnetic poles is increased to wear during the rotation from one side of the carrier part to the other.

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The carrier plate is in two ways a shaft in bearings Jitungen is mounted in fixed supports, but the shaft can be replaced by a rigid framework, the magnets and, if appropriate, the contact surface, for example the Discs connects, or any other suitable arrangement may replace the shaft.

The magnetic poles are usually the poles of one or more Electromagnets, so that the strength of their magnetic fields can be changed in a simple manner according to the demands placed on them, but permanent magnets can also be used.

Unsuitable facilities for pushing the length descender off ferromagnetic !!! Material laterally against the contact surface are, for example, a plunger-like slide that is on the Length sections lying on a smooth table, a walking beam conveyor or two chain slings that support the Wear length sections and the lower ends of which are adjacent to the disc edges and their raised ends are in an adjustable height laterally offset from the pane edges. An inclined ramp can also be used in some cases can be used, for example when the length sections have a round cross-section and can roll laterally.

The devices for detaching the lengths from the edges The abutment surface can be a rigid abutment to hold the length sections in place while the magnetic poles continue to rotate, forcibly removing the length sections from the magnets be separated, or it can if the magnets are electromagnets are, a resistor or a circuit breaker can be used to reduce the electrical current to the electromagnet or interrupt it in order to reduce the magnetic field to cause the electromagnet, so that the lengths of

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fall off the contact surface. These two options can be combined with advantage · If the magnets are permanent magnets «their structure can include auxiliary coils, which can be excited to generate an opposing magnetic field for a short period around the length sections to replace.

According to the invention, a method for separating length sections from ferromagnetic ^. Material created, the steps of pressing a group of length segments made of ferromagnetic material laterally in the direction of and against a contact surface on one side of a carrier part of the device according to the invention, the magnetic retention a length of the ferromagnetic material against the contact surface, the rotation of the support part to lift off the length section held on the contact surface from the group of lengths to this one on the other To bring side of the support part and the detachment of the length of ferromagnetic material from the contact surface includes

The carrier part and the magnetic poles attached to it are preferably rotated continuously while successive lengths of ferromagnetic material are separated from the group will.

The invention is described below with reference to one in the drawing illustrated embodiment explained in more detail.

The drawing shows a cross section of an embodiment of the device which is suitable for cutting steel bars.

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A shaft 10 is in bearings in at least two rigid support » supports, of which only one is at 11 in the drawing. is visible. The shaft can with the help of a not shown Motor can be turned in the direction of the arrow. The shaft carries at least two disks at a distance along its length, from which «ine is visible at 12. The shaft also carries at least two spaced apart electromagnets from them one shown generally at 14. The discs 12 and the Electromagnets 14 are keyed to the shaft or attached to other catwalks so that they rotate with the shaft

The various electromagnets 14 are identical aligned on the shaft and have magnetic poles 15 and 16, which are directed outwards at such a distance that their outer end faces are aligned with the edges of the discs 12

On one side of the shaft is a table 20, the one Multiple steel bars 21 carries, which are approximately parallel to the shaft and are separated before further processing have to. A pusher 22 presses the steel bars against the edges of the disks 12.

On the other side of the shaft is one from a motor 26 drivable roller table 25 two or more slideways 27 grooved downwards, only one of which is visible, bridge the gap from the disc edges to the roller table «,

When the pusher pushes the steel bars against the discs and the shaft is rotated with the electromagnets excited, the various magnetic poles 15 run sufficiently close to the the frontmost steel ingot to pull it away from the rest of the group of steel ingots and against the rotating disks as shown in jJO. The steel ingot will

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τοπ the poles 15 do the discs carried around »until he is of the Slideways 27 are held »which protrude between the discs. If you keep turning the magnet poles, they will separate quickly from the steel bar "which can then slide down the slideways to the roller table" as shown at 31. If necessary "the magnetic flux can be reduced at this point" in order to gently separate the steel bar from the Xanten of the Support washers and on the slideways. There can be a number of steel ingots on the roller table in neat catfish Can be accumulated side by side »or the steel bars can be removed individually.

It will be understood that the force of the pusher 22 on the steel bars "the speed of rotation of the shaft 10 and the strength of the magnetic field provided by the magnetic poles 15 and 16 are all variables that can affect the operating characteristics of the device. It may be necessary to 'these variables according to the shape and the flared of the length of the processed material and according to the extent to which they are already scrambled into one another »to be adjusted in order to avoid» that the magnetic poles either do not take up a length section or that they cover more than one length section. A control of the magnetic field strength by an operator is particularly expedient and this can be achieved in a simple manner by the electrical power supplied to the electromagnets Current is set.

These variables can all be checked and controlled by an operator, but measures can also be taken to ensure that everything else is rejected except for individual sections of length picked up by each electromagnet. With at least two electromagnets there are limit switches arranged that protrude beyond the edges of the discs. These Switches are stationary and do not rotate with the shaft and they are in the same way at a short distance above the

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Point arranged at which the magnetic poles a steel bar should include. Such a limit switch is on de; v: '.tüte · - part 11 shown attached at 32. These switches control an electrical circuit that controls the electromagnets via a preset delay circuit can switch off momentarily ^ the length of the delay being related to the speed of rotation of the shaft such that if not all switches are within the pre-set delay period are actuated, the electromagnets are switched off ^ so that the steel ingot on the table 20 can fall back. When ζJB. an ingot at an angle " is taken, for example by not all electromagnets, at least one of the limit switches is not actuated within the preset delay period after the first Limit switch has been actuated. The magnets are then automatically turned off and the ingot is dropped before it closes pulled far out of its position.

To prevent two bars from being picked up at the same time, another limit switch can be used, which is activated by the Rotation of the shaft itself is actuated. This further limit switch and one of the switches 32 are electrically connected in such a way that that when both are in the on-position, the electromagnets are switched off will. The limit switch on the shaft is switched on when the magnetic poles 15 (or 16) point towards the bars rise on the table and it is switched off at a predetermined rotational position of the shaft, in which the leading edge of a individual bars carried on the disk against the magnetic poles would be at a distance from the limit switch 32, the is smaller than the width of a single bar. This way, if a second ingot is picked up before the first and is worn, the switch 32 is turned on before the limit switch on the shaft is turned off and the electromagnets are switched off so that both bars are thrown back onto the Tlsoh 20 will.

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Although the inventive apparatus has been described above in relation to the separation of the ingots, they can also be used for separation of other length portions from ferr © magnetic material "as Z ₀ B. of the roughed blocks" metal plates or other rolled sections. Furthermore, the length sections to be separated do not necessarily have to be tangled in one another at the beginning and the device can be used to “separate successive length sections from a neat arrangement are short and steep «and they can be collected in a pile« if measures are taken «to move successive overlapping lengths to the side after they have been formed«

It should also be pointed out that the length sections to be separated do not always have to be pressed into actual contact with the rotating disks before they are released from the rotating ones Electromagnets are picked up "provided" they are brought close enough to these disks "so that they can be picked up by the Electromagnets can be used on the discs. A small air gap of 1.6 mm, for example, can be sufficient be close and this air gap can contribute «that only one Length segment is recorded at any time.

Patent claims:

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Claims (6)

Patent claims s 1 * Device for separating successive individual lengths of ferromagnetic material from a group of Lengths of such material, characterized by an essentially horizontally angeord = netes axially rotatable elongated support part (1O), the at least two magnetic poles (15 «16) carry» the same Oriented manner and projecting radially outward from the carrier part "guide device" (12) with a smooth, curved contact surface outside the carrier part "one Define path that extends from one side of the support part adjacent to the rotational path of the magnetic poles over the axis of the Support part extends away, means (20, 22) for Pressing a group of length sections (21) made of ferromagnetic material sideways in Riohtung up and against the contact surface of the guide devices on one side of the support part, motor devices for continuous axial rotation of the support parts with the associated magnetic poles such that a length (j50) made of ferromagnetic Material that is pressed against the contact surface and magnetically attracted in direction to the magnetic poles, on the smooth curved contact surface lifted from the group of length sections and brought to the other side of the support parts will. 2. Apparatus according to claim 1, characterized in that the contact surface on the guide devices is formed by discs (12) on the carrier part (10). 409837/0380 3. Apparatus according to claim 1 or 2, characterized in that the contact surface by at least two attached to the support part (10) at an axial distance Discs (12) is formed so that the magnetic poles (15 »16) protrude radially outward from the carrier part (10) over a distance, which is not larger than the radius of the disks (12) and that the length sections (30) are made of ferromagnetic material against the edges of the panes are in contact. 4. Device naon one of the preceding claims, characterized characterized in that devices (2?) for detaching the length section from the sole edges are provided on the other side of the support part (10). 5. Apparatus according to claim 4, characterized gekennzelch -net that the means for detaching the length sections are formed by the disc edges by a rigid contact element (27), which holds the Längenabsohnitte while the magnetic poles (15, 16) continue to rotate. 6. Device according to one of the preceding claims, characterized characterized in that the carrier part is a shaft (10) which is mounted in bearings in fixed support parts (11) 1st. 7 * Device according to one of the preceding claims, characterized characterized in that the magnetic poles (.15, 16) the Poles of electromagnets (l4) are. Θ. Method for separating successive individual lengths of ferromagnetic material from a group. of lengths of such material, characterized by the steps of pressing the group 409837/0 3 80 of length sections made of ferromagnetic!]! Material laterally in the direction of and against a contact surface one side of the base of a device according to any one of the preceding claims, the magnetic retention of a Length section made of ferromagnetic material against the contact surface »dee Drehε the support part for lifting of the length section held on the contact surface from the group of length sections around this length section to wear on the other side of the carrier part «and the detachment of the length section from the contact surface. Method according to claim 8, characterized in that that the carrier part and the magnetic poles carried by it are continuously rotated * by successive length segments made of ferromagnetic material from the group disconnect ο 409837/0380