Magnetic impact engraving head

IPC classes for russian patent Magnetic impact engraving head (RU 2494877):

B44B3/00 - Artists' machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two-dimensionally for carving, engraving, or guilloching shallow ornamenting or markings (marking or engraving metal by the action of a high concentration of electric current B23H0009060000; forme engraving B41C, B41D; engraving by photomechanical reproduction G03F)

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Method comprises moving the tool according to a specified program in two mutually perpendicular planes and rocking the tool in the transverse direction.

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Electric etching hammer contains body with guides and electric motor, made to be comfortably held in hand, on the shaft of which cylindrical disk is eccentrically fastened, onto which rolling bearing is placed, interacting with carriage, which moves together with tool along guides within limits of a gap set by adjusting screw, gap being determined by disk eccentricity.

Method for artistic working of metal / 2314933

Method involves preparing steel surface of work piece to be processed to predetermined degree of surface finish for making artistic pattern; applying pattern to surface; positioning part to be worked; simultaneously directing laser beam with fused metal over pattern. After smoothing, master-engraver performs additional working of pattern by removing excessively fused metal. Final working involves polishing and oxidizing processes.

Method of automatic setting, adjusting and monitoring tool position in producing images on solid surfaces / 2347681

Proposed method includes transmitting control signal by the control unit to the vertical travel drive connected with electromagnetic machine, tool and surface being processed. The first feedback loop is connected in between the electromagnetic machine and control unit so that the rotor or electromagnetic machine armature output signal is transmitted to the input of first feedback loop element representing a displacement pickup. The signal from output of the latter is sent to the control unit first input. The second loop is connected so that the signal from the electromagnetic machine stator control winding is transmitted to the input of the feedback loop second element representing a transducer of the inductance variation signal. The signal from the output of the latter is transmitted to the control unit second input. The third loop is connected so that the signal from the tool is transmitted, via the filter, to the input of third feedback loop element representing a pickup monitoring the gap between the tool and workpiece surface. The signal from the output of the latter is transmitted to the control unit third input.

Device for carrying out impact effect when applying design on hard surface / 2347682

Device to apply images onto solid surfaces / 2350476

Identification mark for marking valuables and method of making said mark / 2373307

System of protection against counterfeit tool for imaging on solid surfaces by impact engraving (versions) and engraver protected against forgery (versions) / 2395402

FIELD: process engineering.

SUBSTANCE: invention relates to machine-tool construction, particularly, to machining of hard flat surfaces, primarily, in fancy and decorative works. Magnetic impact engraving head comprises the case, solenoid, core engraving needle. Note here that said core is rigidly coupled with moving circular permanent magnets while said case is furnished with damper and fixed permanent circular magnets. Note also said moving circular permanent magnets are arranged concentrically with clearance inside fixed magnets opposite each other while engraving needle is arranged at plate spring secured at the case.

EFFECT: fast operation of engraving head.

1 cl, 1 dwg

The invention relates to machine tools and is designed to handle a hard, flat surface, mainly when performing artistic or decorative work.

Known shock engraving head, part of the engraving machine (http://vri-cnc.ru/modules.php?name=Forums&file=viewtopic&t=231&start=180). Engraving head includes a stepper motor and the core associated with his rod through the lever. At the core by means of a collet clamp fixed engraving (diamond) needle. To reduce the friction force core installed in the bronze guides. Core and diamond needle is do reciprocating motion, knocking on a solid surface hole.

The disadvantage of this engraving head is in its inertia and the inertia (hence the performance of the head, characterized by the number of strokes engraving needles per unit time) is directly dependent on the mass of the core. performing alternating oscillations and work required to overcome the friction of the core in the bearing. Since in this construction the core is enclosed in a bronze bearings, it is necessary to do some work to overcome the force of sliding friction, which slows performance. In addition, diamond head with collet set itself the core, which increases its mass and reduces performance.

Also known international application for an invention "Engraving machine" WO 2011/053124 F2, which can be used as a prototype. Engraving machine along with other units, and includes a magnetic drum head with the solenoid core with the engraving needle and a return spring. The movement of the needle is provided by applying voltage to the coil of the solenoid, the return - spring return or an electromagnet. The force of impact is governed by the amount of current, or the current feed to the coil of the solenoid-driven processor.

This design has the same drawbacks as above. In addition, the speed of the head decreases due to the presence of recoil.

Also known passive magnetic bearings (magnetic bearings) permanent magnets (http://imlab.narod.ru/M_Fields/PM_Bearings/PM_Bearings.htm). and patent Radial bearing Maglev" EN (11) 2264565 (13) C2. Magnetic bearings include outer and inner annular permanent magnets and the core. The performance of the magnetic bearing based on the fact that the magnet of the inner ring, sitting on the core, operating pole, creates a magnetic Nola ahead of itself in the radial direction, and the outer ring magnet with its pole generates a magnetic field, nothing more is reco field magnet of the inner ring, the result is a powerful magnetic circular pillow. When this core semientered formed in a magnetic field and is hanging in the space, not touching the outer ring. Magnetic suspension of the core in shock engraving heads is not applied.

The invention is directed to improving the performance of the engraving head.

The problem is solved by application of the magnetic head suspension of the core and installing the engraving needle on the body of the shock head. These measures help reduce friction and weight of the core.

The design of the magnetic head shown in the drawing.

The magnetic head includes a housing 1, which is installed inside the solenoid consists of a coil 2 coil 3 and the hollow cylinder 4 of a magnetic material. In a hollow metallic cylinder concentrically installed the core 5 of magnetic material. The core is rigidly connected with installed movable annular permanent magnets 6. In the housing 1 opposite the movable annular permanent magnets concentric with the clearance set a fixed permanent annular magnets 7. The enclosure is equipped with a damper 8, intended to soften the blow core of the body. Under the core 5 installed engraving needle 9, fixed to the plate spring 10.

Magnetic drums of Havirov is supplemented flax head works in the following way:

In a static position under the influence of magnetic zeros generated by moving 6 and 7 fixed annular permanent magnets, the core 5 samozastroya and hanging (levitated) in the space, not touching the parts of the housing 1. When forced short radial mechanical effect on the core it deviates from the centerline and the back is the original stable position. Axial mechanical impact core makes oscillating movement up and down. not deviating from the axis. When applying to the coil 3 of the alternating voltage, is magnetized hollow cylinder 4, the magnetic zero which affects the core 5, and he's doing the axial vibrations up and down synchronously with pulses of alternating voltage, but hitting the plate spring 10. In turn, secured to the plate spring engraving needle 9, also makes a reciprocating motion, embossing punch a hole on the surface of the installed underneath a solid material (e.g. marble or granite slab.

Magnetic drums engraving head comprising a housing, a solenoid, a core, engraving needle, characterized in that the core is rigidly connected with the movable annular permanent magnets, and the enclosure is equipped with a damper and a stationary permanent ring m is nitami, moreover, the movable permanent annular magnets mounted concentric with the gap inside the stationary annular permanent magnets opposite each other, and the engraving needle mounted on the plate spring attached to the housing.