CN205074370U - Sunken device of steel sheet is restoreed to electromagnetic attraction power - Google Patents

Abstract

The utility model relates to a sunken device of steel sheet is restoreed to electromagnetic attraction power, the device include and are used for producing the electrical power generating system of high frequency impulse heavy current and place the executor that produces pulsed magnetic field on the steel sheet is sunken, the executor includes the connection gas circuit of carrying out operating coil, collection magnetism ware and the cooling system of built -in package with insulating casing, electrical power generating system includes control circuit, tank, charging loops and discharges the return circuit, just electrical power generating system discharge the return circuit with the operating coil is established ties for it is sunken in order to restore the steel sheet to make the operating coil circular telegram. The utility model discloses traditional electromagnetic forming repulsion force of changeing is the appeal, and the sheet material is sunken to be repaired to being out of shape, need not the dismouting structure, has simplified technology.

Description

A kind of electromagnetic attraction repairs steel plate depression device

Technical field

The utility model relates to steel plate depression reparation field, particularly a kind of electromagnetic attraction and repairs steel plate depression device.

Background technology

Due to collision or other reasons, the steel plate covering of an enclosed construction outer surface usually easily produces depression, cannot very fast directly repairing it from outside, often needs after integral demounting from internal repair.As the depression of automobile panel collision generation, the depression etc. of wing cover generation, the dismounting of these structures is all very difficult, and direct renovation technique is complicated.

Traditional depression reparation (refering in particular to automobile depression here to repair) generally adopts mechanical system, if China Patent Publication No. is the one depression fix tool that CN104722608A document is introduced, is made up of crane span structure and disc.When automobile depression is repaired, by PUR, the pad at crane span structure two ends need be fixed to sunk part, and then by the screw on some dish through screw hole, by the cap nut slowly tighten the screws with annular hand grip, will to be caved in slowly pull-up by spiral power.For another example China Patent Publication No. is a kind of panel beating depression reparation electromagnetism drawbench that CN204247753U document is introduced, comprise coil, electromagnet, DC power box, power switch etc., first its principle for be adsorbed in depression by electromagnet, then by the balancing weight on slide bar, upper limit position block is clashed into, make depression generation plastic deformation recover shape originally.But all there is certain defect in mechanical means, first inefficiency, plastic force is not enough, often need by repeatedly or the long period repair.Its lacquer painting can be destroyed when secondly contacting with sheet metal component.Forming quality is unstable in addition, and the effect of reparation depends on the experience of operating personnel.

The principle of tradition electromagnetic forming technique is, pulsed magnetic field is produced by the pulse current applying high-frequency amplitude in primary coil, and then produce inductive loop in satisfactory electrical conductivity workpiece (as copper, aluminium etc.), and then produce the repulsive force away from coil.Tradition electromagnetic forming technique utilizes electrodynamic repulsion to carry out Forming Workpiece (swollen type, stamping-out, bending etc.) exactly.The repulsive force produced cannot be applicable to the sheet metal component reparation of above enclosed construction outer surface.

Summary of the invention

In view of this, the purpose of this utility model is to provide a kind of electromagnetic attraction and repairs steel plate depression device, and transforming traditional electro-magnetic forming repulsive force is attraction, repairs, without the need to disassembly and assembly structure, simplify technique to distortion plate depression.

The utility model adopts following scheme to realize: a kind of electromagnetic attraction repairs steel plate depression device, comprises producing the power-supply system of high-frequency impulse big current and being positioned over the actuator of steel plate depression upper generation pulsed magnetic field; Described actuator comprises and is fixed the actuating coil of encapsulation, collection chinaware and the connection gas circuit of cooling system with insulation crust; Described power-supply system comprises control circuit, accumulator, charge circuit and discharge loop; And the discharge loop of described power-supply system is connected with described actuating coil, be energized to repair steel plate depression in order to make actuating coil.

Further, described charge circuit is connected with the input of described accumulator, and the output of described accumulator is connected with described discharge loop; Described charge circuit charges to described accumulator, and the electric energy of storage is applied in described discharge loop and produces pulse high current by described accumulator; The control circuit of described power-supply system is connected with the actuating coil of described charge circuit, discharge loop and described actuator, described control circuit is by the discharge switch that controls in the charge switch of described charge circuit and described discharge loop and then control two loops, and described charge circuit and described actuator can feed back described control circuit; Described pulse high current is sinusoidal decay electric current, and its power frequency meets in formula, f is frequency; μ ₀for magnetic conductivity; γ is electrical conductivity; D is steel plate thickness.

Further, described actuating coil is all positioned at the front end of described actuator with collection chinaware, and described collection chinaware is positioned at the front end of described actuating coil.

Further, described actuating coil is cross sectional shape is that rectangular copper cash is wound in plate-like, between the copper cash of plate-like, be provided with insulating barrier; Described collection chinaware profile is trapezoidal round platform and is provided with through hole at axis place, and groove is had on radially, the large end face of described collection chinaware is positioned on the end face of actuating coil, and the large end face of described collection chinaware and the end face of described actuating coil are by together with coil encapsulation body seal.

Further, the coil encapsulation shell of described actuator is connected with actuator central frame; Described actuator central frame offers in order to be provided with by the cannelure of cooling-air the passage being communicated with outside venthole and being connected with cooling-air joint, and has cable groove and pass through wire; Described actuator central frame is connected with actuator rear frame.

Further, the center-side of described actuating coil passes through hole by cylinder connector lug, electrode cable one end is connected on cylinder connector lug by groove and fixes with screw, the external terminal of actuating coil is connected with T-shaped connector lug by wire groove, T-shaped connector lug is made up of T-shaped matrix block and briquetting, and the external terminal of actuating coil to be coordinated with installing hole by briquetting and is fixedly connected with screw; Described T connector is connected with negative pole cable, and arranges insulation sleeve between described electrode cable and negative pole cable in order to isolate; In described power-supply system, discharge loop is connected with described electrode cable and negative pole cable.

Further, described actuator also comprises cooling system, the connection gas circuit of described cooling system is arranged in cylindrical groove, described connection gas circuit comprises cooling-air pipe and cooling-air joint, one end of described cooling-air pipe is connected with one end of cooling-air joint, and the other end access passage of described cooling-air joint forms complete path; Cooling-air is by cooling-air pipe, cooling-air joint, passage cooling work coil being discharged by venthole in cannelure.

Further, described actuator also comprises rear handle component and back handle; Described rear handle component comprises fixed axis and suspension ring bearing, and described fixed axis and suspension ring bearing are fixed on described actuator middle frame; Described suspension ring bearing, in order to hang the weight of the whole actuator of fixed support and to make actuator rotate along the axis of fixed axis, is applicable to the plane of different angles; Described back handle is connected with actuator rear frame.

In the utility model, a kind of electromagnetic attraction repairs the control method of steel plate depression device, comprises the following steps:

Step S1: the control circuit in described power-supply system controls charge switch and closes, and discharge switch is opened a way; Described charge circuit charges to described accumulator, and after the charging of described accumulator reaches particular energy, described charge circuit applies one and feeds back to described control circuit, and described control circuit controls charge switch and to have opened a way charging;

Step S2: center actuating coil and integrator in described actuator being positioned over steel plate to be repaired depression top;

Step S3: described control circuit controlled discharge switch closes, and the discharge circuit in described power-supply system discharges, applies high-frequency impulse heavy current to actuating coil; Described actuating coil produces electromagnetic attraction after forming high-frequency impulse magnetic field, in order to repair steel plate depression;

Step S4: after the reparation of steel plate depression completes, described control circuit controls described charge switch and discharge switch is opened a way, and removes described actuator.

Further, charging times can be set and discharge time carries out multiple discharge in described control circuit, in order to apply the high-frequency impulse big current that or is class to actuating coil, described actuating coil produces one or a series of electromagnetic attraction after forming one or a series of high-frequency impulse magnetic field; Its high-frequency impulse heavy current is fed back to described control circuit by described actuating coil simultaneously, and described control circuit also can set discharge voltage.

Especially, described electromagnetic attraction produces based on following principle:

First the utility model basic structure and traditional electrical magnetic forming basically identical while between coil and workpiece, add a collection chinaware, collection chinaware has the effect in enrichment magnetic field; By the characteristic of eddy current in the flowing of good conductor surface, by introduction by magnetic field to the position of specifying, produce magnetic field by actuating coil generally and produce an impulse magnetic field by the magnetic collecting effect collecting chinaware, and then produce electromagnetic force at workpiece.

But the attraction that the device that the utility model provides and control method thereof are only applicable to ferrimagnet (as steel plate) is shaped, and is different from traditional electromagnetic forming technique and is generally used for without ferromagnetism good conductor (copper, aluminium etc.).But steel, as a conductor, can be subject to the effect of power equally in Rapid Variable Design magnetic field, the electromagnetism be therefore subject in workpiece and power F _mformula as shown in formula (1):

$F_m\left(t\right)={\∫}_0^D\mathrm{\π}\·r\·P_L(r,t)dr+{\∫}_0^D\mathrm{\π}\·r\·P_M(r,t)dr---\left(1\right)$

Specifically, the Part I of formula (1) describe the part of Lorentz force in magnetic field, specifically describe shown in formula (2):

The Part II of formula (1) describe the part of magnetostatic power in magnetic field, specifically describe as shown in formula (3):

$P_M(r,t)=-\frac{{\mathrm{\μ}}_0\·{\mathrm{\μ}}_r}{2}\·({\mathrm{\μ}}_r-1)\·\{\[H_{1Z}^2(r,t)-H_{2Z}^2(r,t)\]+\frac{1}{{\mathrm{\μ}}_r}\[H_{1r}^2(r,t)-H_{2r}^2(r,t)\]\}---\left(3\right)$

Be different from the repulsive force part that traditional electrical magnetic forming utilizes Lorentz force to produce, the utility model produces the main attraction just relying on the magnetostatic power described by Part II to produce in the situation of attraction.

And in order to reverse electromagnetic force direction, and improve the efficiency of attraction.Need Part II proportion in formula (1) to require large as much as possible, therefore need the distribution proportion of magnetic field within the workpiece in vertical direction higher, namely increase the length of penetration in magnetic field.And produce such effect generally by applying quasi-static high-intensity magnetic field to realize.Quasi-static high-intensity magnetic field produces relevant to the electric current applied in described actuating coil essentially, fast-changing electric current could produce high-intensity magnetic field, its cycle is also basically identical with the electric current in described actuating coil simultaneously, therefore proposes the requirement of power frequency in formula (4):

$f_{max}<<\frac{1}{\mathrm{\&pi;}\&CenterDot;{\mathrm{\&mu;}}_0\&CenterDot;\mathrm{\&gamma;}\&CenterDot;d^2}---\left(4\right)$

In formula: f is frequency; μ ₀for magnetic conductivity; γ is electrical conductivity; D is steel plate thickness;

This is just different from traditional electrical magnetic forming and requires frequency high as far as possible (in order to improve electro-magnetic forming power), completed the control of power frequency by the parameter of control coil in the implementation process of reality, when applying the low-frequency current of specifying in actuating coil, an electromagnetic attraction will be produced in ferromagnetic workpiece.

Compared with prior art, the utility model has following beneficial effect: it is attraction that (1) the utility model transforms traditional electro-magnetic forming repulsive force, is applicable to the reparation of being out of shape plate depression, without the need to disassembly and assembly structure, simplifies technique; (2) the utility model makes the control of reparation forming process more accurate by the mode accurately controlling electric energy, and forming effect is better; (3) the utility model adopts electromagnetic force shaping plate, contacts, the coating on its surface not fragile with blank mechanical; (4) actuator is provided with foil portion and can rotates along fixed axis, is applicable to different angles plane.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of the utility model embodiment.

Fig. 2 is the actuator general synoptic diagram of the utility model embodiment.

Fig. 3 is that Fig. 2 is along A-A cut-away illustration.

Fig. 4 is that Fig. 2 is along B-B cut-away illustration.

Fig. 5 is Fig. 4 C place partial enlarged drawing.

Fig. 6 is the actuating coil of the utility model embodiment and cylindrical connector lug schematic diagram.

Fig. 7 is the collection chinaware schematic diagram of the utility model embodiment.

In figure: 1-package casing; 2-collection chinaware; 3-division board; 4-actuating coil; 5-cylinder connector lug; 6-fixes division board; 7-actuator central frame; 8-actuator rear frame; 9-rear handle component; 11-T type connector lug; 12-electrode cable; 13-negative pole cable; 14-insulation sleeve; 15-cooling-air pipe; 16-cooling-air joint; 17-power-supply system; 18-blank; 21-collection chinaware through hole; 22-collection chinaware groove; 30-screw; 41-copper cash; 42-insulating tape; 43-installing hole; 51-red copper cylinder; The semicircle briquetting of 52-; 71-cannelure; 72-venthole; 73-passage; 74-through hole; 75-cylinder boss; 76-cable groove; 78-wire through-hole; 81-cylindrical groove; 82-line outlet; 83-metal inserted piece; 91-fixed axis; 92-front hand grip; 93-hold-down screw; 94-suspension ring bearing; 111-T mold base block; 112-briquetting; 171-control system; 172-charge circuit; 173-energy-storage system; 174-discharge loop.

Detailed description of the invention

Below in conjunction with drawings and Examples, the utility model is described further.

The present embodiment provides a kind of electromagnetic attraction to repair steel plate depression device, comprises producing the power-supply system of high-frequency impulse big current and being positioned over the actuator of steel plate depression upper generation pulsed magnetic field; Described actuator comprises and is fixed the actuating coil of encapsulation, collection chinaware and the connection gas circuit of cooling system with insulation crust; Described power-supply system comprises control circuit, accumulator, charge circuit and discharge loop; And the discharge loop of described power-supply system is connected with described actuating coil, be energized to repair steel plate depression in order to make actuating coil.

In the present embodiment, as shown in Figure 1, the described charge circuit 172 of described power-supply system 17 is connected with described accumulator 173 input, and the output of described accumulator 173 is connected with described discharge loop 174; Described charge circuit 172 charges to described accumulator 173, and the electric energy of storage is applied in described discharge loop 174 and produces pulse high current by described accumulator 173; The control circuit 171 of described power-supply system is connected with the actuating coil 4 of described charge circuit 172, discharge loop 174 and described actuator, energising in described actuating coil 4, and then impact exists the steel plate blank 18 of depression.Described control circuit 171 is by the discharge switch that controls in the charge switch of described charge circuit and described discharge loop and then control two loops, and described charge circuit and described actuator can feed back described control circuit; Described pulse high current is sinusoidal decay electric current, and its power frequency meets in formula, f is frequency; μ ₀for magnetic conductivity; γ is electrical conductivity; D is steel plate thickness.

In the present embodiment, when finishing the work, control circuit 171 controls charge switch and closes, discharge switch is opened a way, charge circuit 171 charges to accumulator 173, after charging reaches the energy of specifying, charge circuit 171 applies a feedback charge switch has been opened a way charging, actuating coil 4 to assigned address in rear Artificial Control actuator, manual operation control circuit 171 closes discharge switch, power-supply system carrys out the automatic multiple discharge of the above step of repetition by setup parameter, in real time the parameter feedback in actuating coil 4 is returned control system simultaneously.

In the present embodiment, as shown in Figures 4 to 7, described actuating coil 4 is positioned at the front end of described actuator with collection chinaware 2, described actuating coil 4 with integrate chinaware 2 as the main working parts in actuator.The front end of described actuator is equipped with coil encapsulation shell 1, collection chinaware 2, division board 3, actuating coil 4, cylinder connector lug 5 and fixing division board 6 from the bottom to top successively.

In the present embodiment, as shown in Figure 6, described actuating coil 4 is that rectangular copper cash 41 (also can use the good material of other electric conductivity) is wound in plate-like for cross sectional shape, envelopes copper cash 41 completely at the insulating tape 42 that is provided with between layers of the actuating coil 4 of plate-like; Be drilled with installing hole 43 in the copper cash termination of the center of the actuating coil of described plate-like to be connected with cylinder connector lug 5, the axis of described cylinder connector lug 5 and the dead in line of actuating coil 4; In the copper cash termination of the periphery of the actuating coil of described plate-like, copper cash 45-degree-buckling is also drawn vertically and is drilled with installing hole 43 in end; Described cylinder connector lug 5 is merged by two assembly red copper cylinders 51 and semicircle briquetting 52 and steps up to form, and connects with screw 30 in centre; Described collection chinaware 2 is between actuating coil 4 and anterior coil encapsulation shell 1 and within the depression being arranged on coil encapsulation shell 1, integrate chinaware 2 shape as stairstepping round platform, for red copper material is made, centre be drilled with through hole 21 and radially on have groove 22; Between described actuating coil 4 and described collection chinaware 2, described division board 3 is also installed, then described actuating coil 4, division board 3 and collection chinaware 2 are first combined axis successively and are mutually alignd and unified put into coil encapsulation shell 1, be placed with described fixing division board 6 above described actuating coil 2 carry out closing and fix with screw 30, only make the lead-in wire of described actuating coil 4 and cylinder connector lug 5 stretch out.Coil encapsulation shell 1 inside has die cavity and described component operation coil 4, division board 3 and collection chinaware 2 closely cooperate, and outer shape is cylindrical, and is processed with the ladder hole coordinating assembling.

In the present embodiment, as shown in Figures 2 to 4, the coil encapsulation shell 1 of described actuator is connected with actuator central frame 7; Described actuator central frame 7 entirety is stepped cylindrical shape, and the bottom of described actuator central frame is cylindrical depression, and described cylindrical depression internal diameter coordinates with coil encapsulation shell 1 external diameter, and is connected and fixed with screw 30; Described cylindrical depression inside offers in order to be provided with to be communicated with outside venthole 72 by the cannelure 71 of cooling-air, through hole 74 is had with by described cylinder connector lug 5 at the axis place of described cylindrical depression, in cannelure, have passage 73, the one end above described passage 73 is connected with cooling-air joint 16; The top of described actuator central frame is cylindrical boss 75, and described cylindrical boss 75 external diameter is connected with actuator rear frame 8, and is fixedly connected with screw 30; Described cylindrical boss 75 radial direction has cable groove 76 be communicated with through hole 74, described cylindrical boss 75 end face has screwed hole 77 and wire groove 78; Described actuator rear frame 8 global shape is roughly as cylindrical, and inner two sides all has cylindrical groove 81, and coordinates with actuator central frame 7; The radial direction of described cylinder boss has line outlet 82 consistent with groove 76 direction, be distributed with metal inserted piece 83 in order to be threaded described with both sides on the position in vertical 90 ° of line outlet 82 direction; Described actuator central frame 7 adopts insulating materials to make with actuator rear portion frame 8 frame.

In the present embodiment, as shown in Figure 3 and Figure 4, described actuating coil 4 center-side passes through hole 74 by cylinder connector lug 5, electrode cable 12 one end is connected on cylinder connector lug 5 by groove 76 and fixes with screw 30, the external terminal of actuating coil 4 is connected with T-shaped connector lug 11 by wire groove 78, T-shaped connector lug 11 is made up of T-shaped matrix block 111 and briquetting 112, and the external terminal of actuating coil 4 to be closed with installing hole 21 by briquetting 112 and is fixedly connected with screw 30; Described T connector 11 is connected with negative pole cable 13, and is fixed on screwed hole 77 with screw 30.And insulation sleeve 14 is set between described electrode cable 12 and negative pole cable 13 in order to isolate; In described power-supply system 17, discharge loop 174 is connected with described electrode cable 12 and negative pole cable 13.

Further, the connection gas circuit of described cooling system is arranged in cylindrical groove, described connection gas circuit comprises cooling-air pipe 15 and cooling-air joint 16, one end of described cooling-air pipe 15 is connected with one end of cooling-air joint 16, and the other end access passage 73 of described cooling-air joint 16 forms complete path; Cooling-air is by cooling-air pipe 15, cooling-air joint 16, passage 73 cooling work coil 4 being discharged by venthole 72 in cannelure 71.

In the present embodiment, described actuator also comprises rear handle component 9 and back handle 10; Described rear handle component comprises fixed axis 91, front hand grip 92, hold-down screw 93 and suspension ring bearing 94; Described fixed axis 91 is threaded fixing with metal inserted piece 83, described fixed axis 91 1 end face connection metal mold insert 83, other end connects front hand grip 92 or hold-down screw 93, its axial plane coordinates with suspension ring bearing 94, relatively rotate in order to make suspension ring bearing 94 and fixed axis 91, described suspension ring bearing 94, in order to hang the weight of the whole actuator of fixed support and to make actuator rotate along the axis of fixed axis 91, is applicable to the plane of different angles; Described back handle 10 is connected fixing with screw 30 with actuator rear frame 8.

The utility model also provides a kind of electromagnetic attraction to repair the control method of steel plate depression device, comprises the following steps:

Step S1: the control circuit 171 in described power-supply system controls charge switch and closes, and discharge switch is opened a way; Described charge circuit 172 charges to described accumulator 173, after described accumulator 173 charging reaches particular energy, described charge circuit 172 applies one and feeds back to described control circuit, and described control circuit 171 controls charge switch and to have opened a way charging;

Step S2: actuating coil in described actuator 4 and collection chinaware 2 are positioned over steel plate to be repaired cave in above center, i.e. blank 18 place in Fig. 1;

Step S3: described control circuit 171 controlled discharge switch closes, and the discharge circuit 174 in described power-supply system discharges, and applies high-frequency impulse big current to actuating coil 4; Described actuating coil produces electromagnetic attraction after forming high-frequency impulse magnetic field, in order to repair steel plate depression;

Step S4: after the reparation of steel plate depression completes, described control circuit 171 controls described charge switch and discharge switch is opened a way, and removes described actuator.

In the present embodiment, charging times can be set and discharge time carries out multiple discharge in described control circuit 171, in order to apply the high-frequency impulse big current that or is class to actuating coil 4, described actuating coil 4 produces one or a series of electromagnetic attraction after forming one or a series of high-frequency impulse magnetic field; Its high-frequency impulse heavy current is fed back to described control circuit by described actuating coil 4 simultaneously, and described control circuit also can set discharge voltage.

In the present embodiment, especially, described electromagnetic attraction produces based on following principle:

First the basic structure of the present embodiment and traditional electrical magnetic forming basically identical while between coil and workpiece, add a collection chinaware, collection chinaware has the effect in enrichment magnetic field; By the characteristic of eddy current in the flowing of good conductor surface, by introduction by magnetic field to the position of specifying, produce magnetic field by actuating coil generally and produce an impulse magnetic field by the magnetic collecting effect collecting chinaware, and then produce electromagnetic force at workpiece.

But the attraction that the device that the utility model provides and control method thereof are only applicable to ferrimagnet (as steel plate) is shaped, and is different from traditional electromagnetic forming technique and is generally used for without ferromagnetism good conductor (copper, aluminium etc.).But steel, as a conductor, can be subject to the effect of power equally in Rapid Variable Design magnetic field, the electromagnetism be therefore subject in workpiece and power F _mformula as shown in formula (1):

$F_m\left(t\right)={\&Integral;}_0^D\mathrm{\&pi;}\&CenterDot;r\&CenterDot;P_L(r,t)dr+{\&Integral;}_0^D\mathrm{\&pi;}\&CenterDot;r\&CenterDot;P_M(r,t)dr---\left(1\right)$

Specifically, the Part I of formula (1) describe the part of Lorentz force in magnetic field, specifically describe shown in formula (2):

The Part II of formula (1) describe the part of magnetostatic power in magnetic field, specifically describe as shown in formula (3):

$P_M(r,t)=-\frac{{\mathrm{\&mu;}}_0\&CenterDot;{\mathrm{\&mu;}}_r}{2}\&CenterDot;({\mathrm{\&mu;}}_r-1)\&CenterDot;\{\&lsqb;H_{1Z}^2(r,t)-H_{2Z}^2(r,t)\&rsqb;+\frac{1}{{\mathrm{\&mu;}}_r}\&lsqb;H_{1r}^2(r,t)-H_{2r}^2(r,t)\&rsqb;\}---\left(3\right)$

Be different from the repulsive force part that traditional electrical magnetic forming utilizes Lorentz force to produce, the utility model produces the main attraction just relying on the magnetostatic power described by Part II to produce in the situation of attraction.

And in order to reverse electromagnetic force direction, and improve the efficiency of attraction.Need Part II proportion in formula (1) to require large as much as possible, therefore need the distribution proportion of magnetic field within the workpiece in vertical direction higher, namely increase the length of penetration in magnetic field.And produce such effect generally by applying quasi-static high-intensity magnetic field to realize.Quasi-static high-intensity magnetic field produces relevant to the electric current applied in described actuating coil essentially, fast-changing electric current could produce high-intensity magnetic field, its cycle is also basically identical with the electric current in described actuating coil simultaneously, therefore proposes the requirement of power frequency in formula (4):

$f_{max}<<\frac{1}{\mathrm{\&pi;}\&CenterDot;{\mathrm{\&mu;}}_0\&CenterDot;\mathrm{\&gamma;}\&CenterDot;d^2}---\left(4\right)$

This is just different from traditional electrical magnetic forming and requires frequency high as far as possible (in order to improve electro-magnetic forming power), completed the control of power frequency by the parameter of control coil in the implementation process of reality, when applying the low-frequency current of specifying in actuating coil, an electromagnetic attraction will be produced in ferromagnetic workpiece.

The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.

Claims (8)

1. electromagnetic attraction repairs a steel plate depression device, it is characterized in that: comprise producing the power-supply system of high-frequency impulse big current and be positioned over the upper actuator producing pulsed magnetic field of steel plate depression; Described actuator comprises the actuating coil, the collection chinaware that are fixed encapsulation with insulation crust; Described power-supply system comprises control circuit, accumulator, charge circuit and discharge loop; And the discharge loop of described power-supply system is connected with described actuating coil, be energized to repair steel plate depression in order to make actuating coil.

2. a kind of electromagnetic attraction according to claim 1 repairs steel plate depression device, and it is characterized in that: described charge circuit is connected with the input of described accumulator, the output of described accumulator is connected with described discharge loop; Described charge circuit charges to described accumulator, and the electric energy of storage is applied in described discharge loop and produces pulse high current by described accumulator; The control circuit of described power-supply system is connected with the actuating coil of described charge circuit, discharge loop and described actuator, described control circuit is by the discharge switch that controls in the charge switch of described charge circuit and described discharge loop and then control two loops, and described charge circuit and described actuator can feed back described control circuit.

3. a kind of electromagnetic attraction according to claim 1 repairs steel plate depression device, it is characterized in that: described actuating coil is all positioned at the front end of described actuator with collection chinaware, and described collection chinaware is positioned at the front end of described actuating coil.

4. a kind of electromagnetic attraction according to claim 3 repairs steel plate depression device, it is characterized in that: described actuating coil is cross sectional shape is that rectangular copper cash is wound in plate-like, between the copper cash of plate-like, be provided with insulating barrier; Described collection chinaware profile is trapezoidal round platform and is provided with through hole at axis place, and groove is had on radially, the large end face of described collection chinaware is positioned on the end face of actuating coil, and the large end face of described collection chinaware and the end face of described actuating coil are by together with coil encapsulation body seal.

5. a kind of electromagnetic attraction according to claim 4 repairs steel plate depression device, it is characterized in that: the coil encapsulation shell of described actuator is connected with actuator central frame; Described actuator central frame offers in order to be provided with by the cannelure of cooling-air the passage being communicated with outside venthole and being connected with cooling-air joint, and has cable groove and pass through wire; Described actuator central frame is connected with actuator rear frame.

6. a kind of electromagnetic attraction according to any one of claim 1,4,5 repairs steel plate depression device, it is characterized in that: the center-side of described actuating coil passes through hole by cylinder connector lug, electrode cable one end is connected on cylinder connector lug by groove and fixes with screw, the external terminal of actuating coil is connected with T-shaped connector lug by wire groove, T-shaped connector lug is made up of T-shaped matrix block and briquetting, and the external terminal of actuating coil to be coordinated with installing hole by briquetting and is fixedly connected with screw; Described T connector is connected with negative pole cable, and arranges insulation sleeve between described electrode cable and negative pole cable in order to isolate.

7. a kind of electromagnetic attraction according to any one of claim 1,4,5 repairs steel plate depression device, it is characterized in that: described actuator also comprises cooling system, the connection gas circuit of described cooling system is arranged in cylindrical groove, described connection gas circuit comprises cooling-air pipe and cooling-air joint, one end of described cooling-air pipe is connected with one end of cooling-air joint, and the other end access passage of described cooling-air joint forms complete path; Cooling-air is by cooling-air pipe, cooling-air joint, passage cooling work coil being discharged by venthole in cannelure.

8. a kind of electromagnetic attraction according to any one of claim 1,4,5 repairs steel plate depression device, it is characterized in that: described actuator also comprises rear handle component and back handle; Described rear handle component comprises fixed axis and suspension ring bearing, and described fixed axis and suspension ring bearing are fixed on back handle described in described actuator middle frame is connected with actuator rear frame.