SI25598A - Impulse metal heater - Google Patents

Abstract

The object of the invention is an impulse heater of metals, that is, a device used for point-by-moment impulse heating of sheet metal, especially car bodies. It is purposefully used to repair injuries and dents caused by hail, vandalism, or other occurrences. The impulse metal heater of the invention, consisting of a power transformer (1), a control electronic circuit (2), and a display (3) of the set machining power to allow the flow through the graphite electrode of the handle (4) to "electrode +" in contact with the body sheet at the point of the well is precisely heated by the material and binds the microparticles of the graphite electrode with the exposed metal.

Description

PULSE METAL PULLER

The object of the invention is an impulse heater of metals, that is, a device used for point-by-moment impulse heating of sheet metal, especially car bodies. It is purposefully used to repair injuries and dents caused by hail, vandalism, or other occurrences. The invention belongs to Class B21d 1/06 of the International Patent Classification.

The technical problem that the present design of the impulse metal heater according to the invention successfully solves is the offset from the hail or otherwise damaged sheet metal, in particular the car body, which has not been damaged by paint or paint. varnish on the outer surface.

The fall or impact of a stiffer object on the car body creates a larger or smaller recess which needs to be leveled. It is important that the damage does not damage the paint or varnish and that the impulse heater according to the invention can relieve the stresses generated in the damaged places by returning the recessed sheet to its original state without the need for varnishing during such repair. the entire surface of the car body.

Patent document WO2012 / 028636 discloses a universal tool for repairing, handling and reshaping bodywork on the basis of cold-forming. The tool consists of several elongated elements that allow for calibration while optimizing the use of the tool with individual tool extensions and overall length. With the tool described, mechanical repair of hail-damaged body sheet metal is possible, but in doing so it will necessarily damage the paint or paint. lacquer and body painting or painting is required.

The impulse metal heater according to the invention, unlike the cold transformation described above, by means of the known restoration procedures known so far, thermal treatment of the recess, without damage to the varnish on the outer surface. During the process of treating the recess with the impulse heater of the invention, the resulting stresses are thermally released, without altering the structure of the sheet metal and returning to its original state without damaging the varnish on the outer surface of the body.

The impulse metal heater according to the invention, consisting of a power transformer, a control electronic circuit and a display of the set processing power, allows the current to heat the material through the graphite electrode of the handle "electrode +" in contact with the body sheet at the recess point and to bind the microparticles of the graphite electrode to the exposed metal.

The invention will be explained in more detail on the basis of an embodiment and the accompanying drawings, of which: Figure 1 is a block diagram of a pulse metal heater according to the invention; Figure 2 is a block diagram of a control electronic circuit; Figure 3 shows a cross-section of the handle (electrode +); Fig. 4 cross section of the handle (mass -).

The impulse metal heater according to the invention comprises a power transformer 1, a control electronic circuit 2 and a display 3 of the set processing power in a compact metal housing. The output terminals a, b of the electronic control circuit 2 are connected to the primary part of the power transformer 1, and the secondary terminals c, d of the power transformer 1 are connected via cables to the levers 4,5 with which the repair is carried out. The output voltage at terminals c, d of the power transformer 1 is displayed via the control electronic circuit 2 on the power display 3. Lever 4 is connected to terminal c while lever 5 is connected to terminal d. The handle 4, as "electrode +", has a graphite electrode 8 clamped in a metal support part 6, housed in an insulated holder 7, to heat the damaged well. The arm 5 as a "mass -" has a permanent magnet 11 attached to the metal support part 9 housed in the insulated holder 10, which ensures good contact with the body without further scratches or damage.

After switching on the metal pulse heater, a permanent magnet handle 5 is placed 11 in the immediate vicinity of the body recess, while a micro-heated sheet metal is heated by point 4 with the contact and sliding of the electrode 8 at the point of damage. The resulting stresses in the material are released, and consequently, the indentation is recessed to the final leveling state without damage to the varnish. The heating output is adjustable with potentiometer 12 and read on the display 3 of the set processing power.

When the normal sine wave supply is switched on, the primary part of the power transformer 1 is fed through the control electronic circuit 2 such that the output signal strength from the control electronic circuit 2 at terminals a, b varies according to the set value required for repair.

The control electronic circuit 2 is shown in the block diagram in Fig. 2. It consists of a measuring control part A, a power part B and a control part C, which acts as a signal converter. The control electronic circuit 2 assures us that the primary voltage of transformer 1 is not sinusoidal but of the same frequency as the input sinus, which means that the primary part of power transformer 1 is pulsed with a specific signal shape. At the output terminals c, d of the transformer, a signal is obtained that allows the current to heat the material and connect the microparticles of the graphite electrode 8 to the exposed metal by using the levers 4,5 through the graphite electrode 8 in contact with the body sheet at the recess location. . The aforementioned means that the resulting stress tensions can be relaxed, the material hardened and the damaged part of the body be compensated, without reaching a temperature that would damage the top coat of the paint, so that no repainting of the body is necessary.

Claims (5)

PATENT APPLICATIONS A metal impulse heater, characterized in that it consists of a power transformer (1), a control electronic circuit (2) and a display (3) of a set machining strength, wherein the output terminals (a, b) of the electronic control circuit (2) are connected to the primary part of the power transformer (1), and the secondary terminals (c, d) of the power transformer (1) are connected to the handles (4,5) by means of cables so that the flow through the graphite electrode (8) of the handle (5) is in contact by pointing the body sheet at the location of the recess, it instantly heats the material and binds the microparticles of the graphite electrode (8) with the exposed metal. Metal pulse heater according to claim 1, characterized in that the output signal strength from the control electronic circuit (2) on the terminals (a, b) varies according to the setpoint required for repair. Metal pulse heater according to claim 1, 2 characterized in that the control electronic circuit (2) ensures that the primary voltage of the power transformer (1) is not of a sinusoidal shape but of the same frequency as the input sine, meaning that the primary part of the power transformer (1) pulse-fed with a specified signal shape. Metal impulse heater according to claims 1 to 3, characterized in that the handle (4) has a graphite electrode (8) clamped as an "electrode +" in the metal support part (6) housed in the insulated holder (7). Pulse metal heater according to claims 1 to 3, characterized in that the lever (5) has a permanent magnet (11) attached to the metal support part (9) mounted in the insulated holder (10) as a "mass -".