SU1429347A1 - Intermittent-action unit for induction heating of metal bodies - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to expand the range of heated products. The installation contains a two-stage heater consisting of two sections, the axes of which are mutually perpendicular. Each section is a rectangular coil equipped with taps along its length, and contains a power source and a loading / unloading mechanism. To achieve this goal, a software controller was introduced, one of the inputs of which is connected to the output of the unit of material properties of the heated product, and the other input to the output of the measuring unit of linear dimensions. ditch: the output of the software controller is connected to the control input of the switch, the power input of which is connected to the power source of each section, and the output of the switch to the inductor section. Installing a batch operation allows you to increase the yield of products by 1.5-2% due to the increased heating uniformity, increase versatility and flexibility. when developing disturbing influences, to ensure the unification of the heating equipment. 6 Il. S CL iu ts5 CD CO 4;

Description

} 1429347

The invention relates to electrical. itepMHH, more specifically to induction-, a periodic effect switch.

The purpose of the invention is to expand the number of heated products in batch plants.

Fig, 1 shows a functional diagram of the installation of induction heating of metal bodies of periodic JQ; effect | Fig. 2 illustrates the heated area in the form of a rectangular slab; a view; 3-6, distribution curves, dividing the temperature field of the slab in

its third input is connected to the output of storage devices a 5, the input of which is connected to the output of block 8 of the linear dimensions of the first section, the output of block 4 of multiplication is connected to the per, quantizing input of source 6 of the second section.

The installation works as follows.

The heated rectangular product is made of a nonmagnetic material with a relatively high resistivity and has a not very pronounced longitudinal (, AB) and transverse (CD) permeable surface effect. Mechanisms after heating in the first and

second sections of the heater.

; The installation contains an induction heater | 1, consisting of two sections | th, the axis of one section coincides with the AB heated product j the axis of the other with the axis. CD and perpendicular to the first, loading-unloading mechanism 2, drive 3. properties / 5 unit 4 by variable load 2 loading-unloading heated from, load is loaded into the first section of induction heater 1, the signal characterizing the length of the product along the axis AB, comes from the output block 8 of linear dimensions of the first section. to the inputs of the program regulator 7 of the first section and the storage device 5. To the input of the program regulation; , the memory device 5, for the 25th of the U comes information from the task

Each of the two sections of the heater is a regulated power supply 6, a software regulator 7, a block of 8 linear dimensions, installed directly. At the entrance to each section, the 9 ko 5-m unit to the capacitor unit О / each of the two sections. The heater is made of three successively connected loops, the central one

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The 3 properties of the material being heated (a function. Depending on the input signals, the program controller 7 according to a pre-calculated program generates a signal that goes to the control input of the switching unit 9. This unit uses the side windings of the first inductor section to set the required the length of the first

The 3 properties of the material being heated (a function. Depending on the input signals, the program controller 7 according to a pre-calculated program generates a signal that goes to the control input of the switching unit 9. This unit uses the side windings of the first inductor section to set the required the length of the first

which are connected to their own regulating section of the heater, forming the rsHTaHiiH source directly, and each of the side windings

It contains tap-offs for connection to the specified power supply through sequentially connected Q-modules connected to its section. Comm and condenser unit, each of the two Software Controllers 7 is made with. Two entrances, one of which is connected to the output of the block 8 of the linear dimensions of its section, and the second input with the 9TH INPUT setting of 3 properties. The first of two outputs of each software 1 Chair 7 is connected to the control input of the switching unit 9 of its own section, the second output of the software controller 7 of the first section is connected to 1) e1 the external input of the power supply of the First section, the second output of riporpaz i50

The magnitude of the deepening of the load in the inductor in the first stage of heating. In addition to organizing the deepening, the switching unit 9 using the capacitor unit 10 creates the necessary impedance of the side windings connected to the central winding according to the autotransformer circuit. From the second output of the program Multi Controller 7 of the first section, in accordance with the foreseen nomenclature of heated products, a signal is sent to the regulating input of the power supply 6 of the first section.

The organization of the deepening and creation of the impedance of the side windings allows, due to the longitudinal electromagnetic edge effects, to heat the zones of the end faces of the product more intensively than

its third input is connected to the output of storage devices a 5, the input of which is connected to the output of block 8 of the linear dimensions of the first section, the output of block 4 of multiplication is connected to the per, quantizing input of source 6 of the second section.

The installation works as follows.

The heated rectangular product is made of a nonmagnetic material with a relatively high resistivity and has a non-pronounced surface effect. The loading-unloading mechanism 2 heated from, the load is loaded into the first section of the induction heater 1, the signal characterizing the product length along the axis AB, comes from the output of the block 8 of linear dimensions of the first section. To the inputs of the program controller 7 of the first section and the storage device 5. On the input of the program regulator pa comes from the back

The 3 properties of the material being heated (a function. Depending on the input signals, the program controller 7 according to a pre-calculated program generates a signal that goes to the control input of the switching unit 9. This unit uses the side windings of the first inductor section to set the required the length of the first

heater sections, thereby forming

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The magnitude of the deepening of the load in the inductor in the first stage of heating. In addition to organizing the deepening, the switching unit 9 using the capacitor unit 10 creates the necessary impedance of the side windings connected to the central winding according to the autotransformer circuit. From the second output of the program Multi Controller 7 of the first section, in accordance with the foreseen nomenclature of heated products, a signal is sent to the regulating input of the power supply 6 of the first section.

The organization of the deepening and creation of the impedance of the side windings allows, due to the longitudinal electromagnetic edge effects, to heat the zones of the end faces of the product more intensively than

a lot of the regulator / 7 of the second section of the sub-regular part (fig. 3), after

It is connected to the first of the three inputs of the .4 multiplication unit; the second input of the multiplication unit is connected to the output of the second section of the 8 linear dimensions unit, and

to achieve the heat content of the heated product of the middle value for, - of this final value, the product is obtained by using mechanism 2 to achieve the heat content of the heated product of the average value for, - for this final value, the product is produced by using the mechanism of 2 loading;

ki-discharge, from the first section of the induction heater and loaded into the second section. As a result of heating in the first stage, the temperature field of the product is uneven. Moreover, the end zones are overheated due to the longitudinal Kpaesbtx effects (Fig. 3), and the faces are not overheated due to the transverse edge effects (Fig. 5).

When loading in. the second section is similar to the load in the first section of the block 8 linear dimensions receives a signal characterizing the width of the heat

product. This signal is received- 15 is chosen, respectively, with the aim of

It has the inputs of the multiplication unit 4 and the program regulator 7 of the second section. The second, the input of the program controller, receives information from the over-compensation of the transverse edge effect that occurs in the second heating stage.

When heating products with relative

yes master of 3 properties. From the output of the npor-2Q low resistivity, I have 30

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The frame controller of the second section receives a signal at the control input of the switching unit 9 of the second section. This unit, using the side windings of the second section of the inductor, sets the required length of the second section of the heater, thereby forming the depth of the load on the inductor in the second heating stage. In addition to organizing the deepening, the switching unit 9 using the capacitor unit 10 of the second section of the inductor creates the necessary impedance of the side windings. From the output of the program regulator 7 of the second section of the inductor in accordance with the envisaged nomenclature of heated products, the signal is fed to the regulating input of the power supply 6 of the second section through multiplication unit 4. If the length and width of the heated product correspond to the envisaged range of heated products (this information is embedded in the program by many controller 7), then in block 4 of the multiplication, the factors entering the second and third inputs correspond to one. Thus, the power level of the second section of the inductor 1 is set in accordance with the stipulated item nomenclature

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Heat the slab in the second section of the inductor (second heating stage). The initial temperature distribution before the second heating stage is uneven (Figs. 3 and 4), and its end zones are underheated (CD), and the face zones are overheated (AB) relative to the regular part, the resulting temperature

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With a pronounced surface effect, overheating of the side faces is observed. In this case, the software controller 7, by means of the commutation unit 9, as a function of the signals from blocks 8 and 3, organizes the burial, at which the end zones in each of the heater sections are underheated. In the limiting case, it is possible to organize the operation mode of the heater with refilling when the product length exceeds the working length of the -section.

When variations in the nomenclature of heated products, which always takes place in real production conditions and, above all, in the length and width of products, disturbances arise. In the proposed installation, these disturbances are automatically processed. By varying the length of the product from the block 8 of the linear dimensions of the first section of the inductor, information is received on the actual length of the product. This information is fed to the input of the program controller 7. the first section and to the input of the memory device 5. The program controller 7 selects by means of the switching unit 9 and the capacitor unit 10 the desired depth and impedance values of the side windings. Having carried out the heating in the first stage, the product, turning about the axis of the second section by 90, is loaded into the second. When loading into: the second section, the linear dimensions block 8 installed at its entrance reads the width of the product. Since the width of the product has not changed, the multiplier produced as a result of sig

After heating in two stages, the field is uniform (Figs. 3 and 6). The length of the second section of the induction heater and, accordingly, the amount of burial is chosen in order to create a longitudinal edge effect in the second heating stage, providing the appearance of a temperature gradient that compensates for the temperature gradient that arose in the first stage due to the transverse edge effect. The length of the first section, and consequently, the magnitude of the deepened in the first stage

compensation of the transverse edge effect arising in the second stage of heating.

When heating products with relatively

low resistivity, I have 0

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With a pronounced surface effect, overheating of the side faces is observed. In this case, the software controller 7, by means of the commutation unit 9, as a function of the signals from blocks 8 and 3, organizes the burial, at which the end zones in each of the heater sections are underheated. In the limiting case, it is possible to organize the operation mode of the heater with refilling when the product length exceeds the working length of the -section.

When variations in the nomenclature of heated products, which always takes place in real production conditions and, above all, in the length and width of products, disturbances arise. In the proposed installation, these disturbances are automatically processed. By varying the length of the product from the block 8 of the linear dimensions of the first section of the inductor, information is received on the actual length of the product. This information is fed to the input of the program controller 7. the first section and to the input of the memory device 5. The program controller 7 selects by means of the switching unit 9 and the capacitor unit 10 the desired depth and impedance values of the side windings. Having carried out the heating in the first stage, the product, turning about the axis of the second section by 90, is loaded into the second. When loading into: the second section, the linear dimensions block 8 installed at its entrance reads the width of the product. Since the width of the product has not changed, the factor generated as a result of sig20

25

The input from the output of block 8 to the second input of block 4 multiplication corresponds to one. Taking into account that the ingot length is changed, then, having entered the second section, its axis AB becomes parallel, the axis СЬ of the second section of the inductor. The variation of the product in this case leads to a change in the side gap between the product and the inducing wire in the side zone. If the penetration in the inductor can be stabilized with a certain degree of discrepancy by means of off-cued ones, then the side clearance 15 can not be stabilized. This disturbance leads to a change in the active power carried out in the product, along with the supply voltage of the inductor. To account for this phenomenon, from the exit.

the storage device 5 to the third in: sod block 4 pee l is fed and 15 forms about measuring the length of the product. The signal that goes to set the output voltage level of the power supply b of the second section5 is multiplied by a factor to allow this variation. As a result, the necessary change in the power supplied to the heater occurs.

Change the width of the heated iz. Due to the fact that, at the first stage of heating, in the product, neither calculated, but less power is released. According to this, in the second stage, it is necessary to compensate for the shortage or excess of heat content obtained by the product in the first stage by changing the power supplied to the second section of the ductor. This is automatically achieved by the fact that the second input of the 4th transducer unit when the product is loaded into the second section receives a signal from the 8th linear dimension block, which ensures the domination of the workpiece

C1 gnalosis received at the first and current inputs of the 4th shift unit, n4 is a factor that is different from one and provides correction for a signal that is not stepping on the regulating input using the

power supply of the second section.

The installation increases the versatility, flexibility in the development of non-stationary streams, which are manifested in ensuring uniform distribution of Tej-s-temperature at the variation of the nomenclature, 55 products (both the material of the heated product, and its geometric

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sizes), provides unification of the equipment.

Formulas and inventions

Installation of induction heating of metal bodies of periodic action, containing an adjustable power source, a loading / unloading mechanism, an induction heater consisting of two sections, the axes of which are mutually perpendicular, which is designed to expand. the range of heated products, a property control unit, a unit: multiplies, a storage device, and a software controller, a unit of linear dimensions, installed directly at the entrance to each section, are inserted into it of the heaters. a unit, each of the two sections of the heater is made in the form of three series-connected windings, the central of which is connected to its regulated power supply directly, and each of the side windings contains tap-offs to connect to the specified power source via serially connected corresponding to their section. a switching unit and a capacitor unit, each of two software controllers is made with two inputs, one of which is connected to the output of the linear dimensions block of its section, and the second input is connected to the output of the setpoint generator, the first one. the two outputs of each software controller is connected to the control input of the switching unit of its section, and the second output of the software controller of the first section is connected to the regulating input of the power supply of the first section, the second output of the software controller of the second section is connected to the first of the three inputs of the multiplication unit, the second the input of the interchange unit is connected to the output of the linear dimensions block of the second section, and its third input is connected to the output of the storage device for, whose input is connected to the output of the linear block the dimensions of the first section, the output of the multiplication unit is connected: to the regulated input of the power source of the second section.

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Claims (1)

Formulas and inventions □ Installation of induction heating of metallic bodies of periodic action, containing an adjustable power supply, a loading and unloading mechanism, an induction heater consisting of two sections whose axes are mutually perpendicular, characterized in that, for the purpose of expansion. 15 rhenium of the nomenclature of heated products, it contains a property setter, a multiplication unit, a storage device, and 'for each of the two sections of the heater - a program controller, a 2o linear-sized unit installed directly at the entrance to each section, a switching unit and a capacitor unit, moreover, each of the two sections of the heater is made in the form of three 25 turned-on windings, the central of which is connected directly to its regulated power source, and each of the side windings contains a tap and for 30connection to the specified power source through sequentially connected corresponding to their section. a switching unit and a capacitor ^Λ unit, each of two software ed ₅ gatekeepers is made with two inputs, one of which is connected to the output of the block of linear dimensions of its section, and the second input is with the output of the property setter, the first of. two outputs kazh ₄₀ dogo program controller connected to the control input of the switch unit of its section, and the second output of program controller of the first section is connected to the control input is4 ₅ power supply can first section, the second output of program controller of the second section is connected to the first of three inputs of multiplying unit, the second the input of the multiplication unit is connected to the ₅₀ output of the linear size block of the second section, and its third input is connected to the output of the storage device, whose input is connected to the output of the linear unit size of the first section, the output of the multiplication unit is connected: to the adjustable input of the power supply of the second section. FIG. f 5429347