CN2438538Y - Controlling apparatus for flying saw of high frequency welded tube mill - Google Patents

Abstract

The utility model discloses a controlling apparatus for a flying saw of a high frequency welded tube mill. An electromagnetic line is adopted for replacing a pneumatic element. Permanent magnets are arranged at two side walls of one electromagnetic cylinder body by the controlling apparatus, and the magnetic polarities of the permanent magnets are oppositely arranged. A coil winding is arranged in the electromagnetic cylinder body, and current directions entering the coil winding are changed by an alternating current through a full-wave rectifying circuit. Thus magnetic field produced by the alternating current is interacted with the magnetic field of permanent magnets, and the electromagnetic cylinder body is driven to continuously make reciprocating motion. An output shaft and the flying saw also make reciprocating motion, and thus the task of cutting off a steel pipe can be completed. The controlling apparatus has the advantages of simple structure, low cost, convenient operation, easy maintenance, and high machining accuracy of the steel pipe.

Description

The control device that a kind of ratio-frequency welded tube unit flies to saw

The utility model relates to a kind of improvement of steel pipe cutting machine structure control device, and it is mainly used on the production line of steel pipe.

At present, in the ratio-frequency welded tube unit that adopts on the pipe production line at home and abroad, cut off steel pipe to fly to saw mostly be to be controlled by pneumatic element, it requires to be equipped with air compressor machine and complicated arrestment mechanism, pins down the action that flies to saw thus, reaches the various functions of finishing clamping, cut-out and conveying steel pipe, this pneumatic control mechanism consumable accessory is many, equipment complexity, producing cost height, the tube quality of production can not get guaranteeing.

Task of the present utility model is the control device that will provide a kind of ratio-frequency welded tube unit to fly to saw, and substitutes pneumatic mechanism with the electromagnetic wire road, have simple in structure, cheap, mechanism is flexible, easy to maintenance, the machining accuracy height of product.

Task of the present utility model is to finish in such a way, the control device that this ratio-frequency welded tube unit flies to saw is to substitute pneumatic element with an electromagnetism cylinder body and electromagnetism circuit thereof, on these electromagnetism cylinder body two sidewalls, two permanent magnets are set, their magnetic polarity is just opposite, a coil windings is placed in inside at the electromagnetism cylinder body, a binding post of this coil windings is to link to each other with the centre tap of the output transformer of power supply, another binding post then is connected on the output of full-wave rectifying circuit, by changing the sense of current of coil windings, gravitation between the magnetic field that it produced and two permanent magnet fields, repulsion also is cyclically-varying, thereby force the electromagnetism cylinder body to produce periodic the reciprocating motion, output shaft that links to each other with the electromagnetism cylinder body and the saw that flies that is contained in above it are also being followed the periodic reciprocating motion of generation, finish the purpose that flies the disconnected steel pipe of sawing.

Below in conjunction with accompanying drawing the utility model is further elaborated.

Fig. 1 is that ratio-frequency welded tube of the present utility model flies to saw the control device structure chart.

Fig. 2 is that ratio-frequency welded tube of the present utility model flies to saw control device coil windings circuit theory diagrams.

Road as can be seen from Figure 1, the control dress cover that this ratio-frequency welded tube unit flies to saw is made up of an electromagnetism cylinder body 1, at madial wall place, the front and back of electromagnetism cylinder body 1 one permanent magnet 2 and 3 are set respectively, water magnet 2 of a specified duration and 3 magnetic polarity put in order just opposite, be that permanent magnet 2 is that N-S arranges, 3 of permanent magnets are that S-N arranges so, arrange otherwise permanent magnet 2 is S-N, and 3 of permanent magnets are that N-S arranges so.In the inside of electromagnetism cylinder body 1 coil windings 4 is arranged, this coil windings 4 has two binding post A and B, and they are connected on the outlet line of power supply.This electromagnetism cylinder body 1 and an output shaft 5 link together, and are equipped with on this output shaft 5 to cut to cut the saw that flies that steel pipe uses.

Fig. 2 then is the control circuit schematic diagram of coil windings 4, AC power 6 is powered to this full-wave rectifying circuit 8 by output transformer 7, the binding post A of coil windings 4 is connected on the centre tap place of output transformer 7, binding post B then links to each other with full-wave rectifying circuit 8 outputs, diode 9 and 10 is attempted by an output of output transformer 7, diode 11 and 12 another outputs that are attempted by output transformer 7, the diode polarity that connects together is arranged opposite, and contactor 13 and 14 are set on their circuit.Because the power supply 6 of input is an alternating current, electric current is by behind the full-wave rectifying circuit 8, enter coil windings 4 by contactor B from binding post B, export from binding post A then, around coil windings 4, produce a magnetic field, the magnetic field of this magnetic field and permanent magnet 2 produces a repulsive force, and produces an attraction with the magnetic field of permanent magnet 3.Promote electromagnetism cylinder body 1 advance the puck, promptly drive output shaft 5 and fly to saw advance the puck, finish the task of cutting off steel pipe.When alternating current passes through contactor 14, binding post A from full-wave rectifying circuit 8 enters coil windings 4 and exports from binding post B, it produces a magnetic field just opposite with last direction around coil windings 4 like this, the magnetic field interaction of this magnetic field and permanent magnet 2 and 3, produce a powerful active force, force electromagnetism cylinder body 1 to be drawn back and get back to original position, output shaft 5 sets back with flying to saw also following.By contactor 13,14 alternations, electromagnetism cylinder body 1 is ceaselessly moved back and forth, it drives output shaft 5 and flies saw and moves back and forth, and flies to saw and just can finish the task of cutting off steel pipe regularly.This control device has simple in structure, and cost is low, because contactor 13 and 14 is to be connected on the alternating current circuit, the arc phenomenon that uses dc source to produce can not occur, the reliable in quality of product, easy to operate, and maintenance is easily.

Claims (1)

1, the control device that a kind of ratio-frequency welded tube unit flies to saw, it is characterized in that: this control device is made of an electromagnetism cylinder body (1), two side-walls respectively are provided with a permanent magnet (2) and (3) in the front and back of electromagnetism cylinder body (1), the magnetic polarity of these two permanent magnets (2) and (3) is arranged just opposite, in electromagnetism cylinder body (1) inside a coil windings (4) is arranged, an its binding post A receives on output transformer (7) centre tap of AC power (6), the binding post B of the other end is that the output with full-wave rectifying circuit (8) joins, output shaft (5) is to link together with electromagnetism cylinder body (1), diode (9) and (10) are attempted by an output of output transformer (7) in full-wave rectifying circuit (8), diode (11) and (12) then are attempted by another output of output transformer (7), diode (9) and (10), (11) opposite with the polarity of (12), contactor (13) and (14) are set on their circuit.

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