KR101846502B1 - Coil base for heat treatment furnace - Google Patents

Abstract

A coil base according to one embodiment of the present invention is a coil base of a heat treatment furnace for high temperature annealing a coil at the temperature of 900 to 1200°C, comprising: a circular shaped plate having a diameter with a predetermined length; a plurality of internal holes formed in the plate with intervals such that the diameter thereof is formed to have a ratio of 100:1 to the diameter of the plate; and a plurality of cutting portions cut toward the center from the outer side edge of the plate, and spaced along the outer side edge. According to one embodiment of the present invention, heat deformation and torsion of the coil base are suppressed such that a life span of the coil base can be increased.

Description

[0001] COIL BASE FOR HEAT TREATMENT FURNACE [0002]

More particularly, the present invention relates to a coil support for minimizing deformation such as twisting due to the weight of the coil or the expansion and contraction of the coil support when the coil is annealed at a high temperature .

Generally, in the method of manufacturing an electric steel sheet coil, heat treatment is performed at a temperature of 1200 ° C at a high temperature for annealing in order to remove stress or recrystallize the cold rolled steel sheet coil. At this time, a disk-shaped coil base is used for the heat treatment furnace to support a coil having a large heat load.

The coil base is not only used for one electric steel coil, but also for other electric steel coils. As a result, the coil can be stably supported even when repeatedly used, and the coil support can be supported by as many processes as possible to provide economical efficiency.

Such a coil base is subjected to a heat treatment for about 120 hours under a maximum temperature of 1200 占 폚 and a cooling process at room temperature for about 60 hours in one cycle (i.e., the high temperature annealing process experienced by an electric steel sheet coil). Since the load of the electric steel sheet coil is received while being heated and cooled by a temperature difference of about 1000 ° C or more, the product is inevitably subjected to thermal deformation and twisting. Accordingly, after 13 to 15 cycles, the product is deformed to such an extent that it can not be used, and there is a disadvantage that the coil base must be replaced.

KR 10-0325123 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a coil support having a shape in which cracks or deformation are suppressed during a high temperature annealing process.

A coil base according to an embodiment of the present invention is a coil base of a heat treatment furnace for high temperature annealing a coil having a temperature in a range of 900 to 1200 DEG C, the circular base plate having a diameter of a predetermined length, : 1, and a plurality of cutouts linearly cut from the outer edge of the plate toward the center, and a plurality of cutouts spaced apart from each other along the outer edge do.

The circumferential width of the cutout portion is formed to a length of 50: 1 ratio with respect to the length of the cutout portion, and the length of the cutout portion is formed to have a length ratio of 8: 1 with respect to the diameter of the plate, The end of the incision is spaced apart by the length of the incision, and the thickness of the plate is 200: 1 in relation to the diameter of the plate.

The coil support according to an embodiment of the present invention is characterized in that the plate is provided with a circular first hollow portion having a diameter of 4: 1 with respect to the diameter of the plate at the center of the plate, A second hollow portion having the same diameter as the first hollow portion is formed, the thickness of the second hollow portion is 250: 1 in relation to the diameter of the plate, the diameter is the same as the diameter of the plate, Lt; / RTI >

The coil base according to an embodiment of the present invention is characterized in that the plurality of inner holes have a plurality of mutually parallel planar shapes formed in one direction so that the distance between the centers of the two adjacent inner holes is a length of the ratio of 50: Wherein a distance between adjacent rows of the plurality of rows is formed to a length of 50: 1 with respect to a diameter of the plate, and inner holes of the adjacent rows are formed to be staggered with respect to each other.

In the coil base according to an embodiment of the present invention, when the temperature of the heat treatment furnace is in a range of 900 ° C. to 1000 ° C., the plurality of cutouts are twelve cutouts spaced at equal intervals from each other, The length of the incision part is set to a length of 25: 1, and each time the temperature of the heat treatment furnace is increased by 100 DEG C, the incision part is increased by two, and the width of the incision part is 100: It increases by the length of the ratio.

The coil support according to an embodiment of the present invention is characterized in that the width formed at the outer edge of the cutout portion is formed to a length ratio of 25: 1 with respect to the length of the cutout portion, Wherein a width of the cut-out portion is smaller than a width of the cut-out portion toward the center of the circle, and the edge of the cut-out portion and the edge of the cut- do.

The width of the coil support from the outer edge of the cutout to the center of the length of the cutout is uniformly reduced to a length of 50: 1 at a ratio of 25: 1 to the length of the cutout, , The width of the end of the incision from the center of the length of the incision is formed to a length of 50: 1 ratio with respect to the length of the incision, the edge formed at the outer edge of the incision and the edge of the end of the incision And is formed into a streamlined shape.

The coil support according to an embodiment of the present invention is characterized in that the plate has an inner diameter portion having a diameter of 16:13 ratio with respect to the plate diameter with respect to the center of the plate and an outer diameter portion having the cut portion formed outside the inner diameter portion Wherein the thickness of the outer diameter portion is formed to have a length ratio of 200: 1 with respect to the diameter of the plate on the inner side of the inner diameter portion and the outer diameter portion of the inner diameter portion, the thickness of the outer rim is 100: The thickness of the plate increases from the inside to the outside of the outer diameter portion.

The coil base according to the embodiment of the present invention uniformly disperses the force applied to the coil base due to the self weight of the coil of the electric steel plate and the frictional force due to the expansion and contraction. In addition, the coil base according to the embodiment of the present invention is designed such that thermal expansion and thermal contraction of the coil base itself according to the temperature change change the shape of the coil base to the minimum.

As a result, thermal deformation or twisting of the coil base is suppressed, thereby stably supporting the electric steel plate, and the number of cycles of use of the coil base can be increased to 20 or more, thereby ensuring economical efficiency.

1 is a perspective view of a coil base of the present invention.
2 is a top view of the coil base of the present invention.
3A and 3B are top views of the sub-plate of the present invention.
4 is a layout view of a coil support to which the sub-plate of the present invention is attached.
5 is a layout diagram of the inner hole of the present invention.
6A to 6D are cut-away portions according to an embodiment of the present invention.
7 is a layout diagram of a coil base and an electric steel plate coil according to the present invention.
8 is another embodiment of the coil base of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of one embodiment of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings and the preferred embodiments thereof. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. It is also to be understood that terms such as "top," " under, "" first," "second, " and the like are used to distinguish one element from another, no. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, a detailed description of known arts which may unnecessarily obscure the gist of an embodiment of the present invention will be omitted.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings, in which like reference numerals refer to like elements.

The following description explains the specification of each constitution of the coil base 10 as a ratio with respect to the diameter of the plate 100. [ Thus, the coil base 10 can be in a form having a constant ratio of having an effect of extending the life span by reducing the thermal deformation and warping by securing an optimized ratio for each structure regardless of the size of the plate 100. [

In the expression of the following ratios, 'a' is described as a: b ratio for 'i'. It is a sea that reveals that 'I': 'a' is a representation of = a: b.

1 and 2 show a coil support 10 according to a temporary example of the present invention.

The coil support 10 according to an embodiment of the present invention is a coil support 10 of a heat treatment furnace for high temperature annealing a coil having a temperature in the range of 900 to 1200 占 폚 and having a circular plate 100 A plurality of inner holes 110 formed to have a diameter of 100: 1 with respect to the diameter of the plate 100 and spaced apart from each other in the plate 100; And a circumferential width of the cutout portion 120 is about 50 to a length of the cutout portion 120. The width of the cutout portion 120 may be about 50 1, and the length of the incision 120 is set to a length of 8: 1 with respect to the diameter of the plate 100, and the length of the incision 120 from the outer rim So that the incision portion 1 The plate 100 has a thickness of 200: 1 with respect to the diameter of the plate 100.

The coil support 10 according to the embodiment of the present invention is characterized in that the plate 100 has a diameter of 16:13 with respect to the diameter of the plate 100 with respect to the center of the plate 100, And the outer diameter portion of the inner diameter portion is divided into an outer diameter portion where the incision portion 120 is formed on the outer side of the inner diameter portion and a thickness of the outer diameter portion is 200: And the thickness of the plate 100 increases from the inner side to the outer side of the outer diameter portion such that the thickness of the outer rim is formed in a length of 100: 1 ratio with respect to the diameter of the plate 100. [

The coil base 10 is used in a heat treatment furnace having a maximum temperature in the range of 900 to 1200 DEG C at the time of high temperature annealing. The coil base 10 is constituted by a circular plate 100. The plate 100 has a predetermined diameter and a predetermined thickness. There is no limitation on the size of the plate 100, but it may be formed to be preferably 1500 mm or more and less than 2500 mm. The thickness of the plate 100 is 200: 1 with respect to the diameter of the plate 100. At this time, the diameter of the plate 100 may be greater than the length of the 7: 8 ratio with respect to the diameter of the steel coil C (C). 6, the diameter of the coil of an electric steel plate C is smaller than the diameter of the plate 100 and is disposed on the coil support 10. [ Accordingly, the size of the coil pedestal 10 can be determined according to the size of the electric steel coil C in the coil pedestal 10 according to the embodiment of the present invention.

A plurality of inner holes 110 are formed in the coil support 10 so that the inner hole 110 can minimize the frictional force between the coil support 10 and the electric steel plate coil generated by the thermal expansion of the coil It plays a role. Further, the inner hole 110 ensures ventilation at the lower portion of the electric steel plate coil C. The diameter of the inner hole 110 is a length of a ratio of 100: 1 to the diameter of the plate 100. When the diameter of the inner hole 110 is larger than the diameter of the plate 100 by a ratio of 100: 1, the stress applied to the coil supporter 10 due to the own weight of the coil B causes the coil- There is a risk. Also, when the diameter of the inner hole 110 is formed to be smaller than the length of the ratio of 100: 1 to the diameter of the plate 100, the function of reducing the frictional force described above may be insufficient. Therefore, it is preferable to define the inner hole 110 by limiting the ratio of the diameter of the plate 100 to 100: 1.

There is a difference in thermal expansion rate between the circular center portion and the circular outer portion of the plate 100, and there is a risk of occurrence of twisting or cracking on the outer periphery of the plate 100 at high temperature annealing.

One of the methods of forming the plate 100 to prevent this is to form the thickness of the center of the plate 100 and the thickness of the outside of the plate 100 differently. Accordingly, the center thickness of the circle of the plate 100 has a length of 200: 1 ratio with respect to the diameter of the plate 100, and the thickness of the circle of the circle of the plate 100 continuously increases to the outer circumference of the circle, To 100: 1 ratio. The thickness of the outer circumference of the circle of the plate 100 should be less than the length of the ratio of 100: 1 with respect to the diameter of the plate 100. When the outer circumference of the plate 100 is formed thicker, It is impossible to make surface contact with the coil C, so that the load of the coil C can be concentrated on only one portion of the coil support 10.

Another method is to form the incision 120 at the outer periphery of the circle of the plate 100. The cutout 120 is formed to extend linearly from the outer edge of the plate 100 toward the center of the circle. The length of the cutout 120 is formed to a length of 8: 1 ratio with respect to the diameter of the plate 100, 120 are formed to be spaced apart from the outer rim by a length of the cutout 120. When the length of the incision 120 is less than the length of the plate 100 in the ratio of 8: 1, the effect of suppressing the thermal expansion of the outer rim of the plate 100 is insufficient. The diameter of the plate 100 can be formed at a ratio of 7: 8 with respect to the diameter of the steel coil C when the length of the cutout 120 is greater than the ratio of 8: 1 length to the diameter of the plate 100 There is a risk that a load of the electric steel plate coil C may be caught by the center of the cutout 120 in the direction of the center of the cutout 120 to cause a crack at the end of the cutout 120. Thus, the length of the incision 120 may be limited to a ratio of 8: 1 to the diameter of the plate 100. In addition, the circumferential width of the cutout 120 is set to a length of 50: 1 ratio with respect to the length of the cutout 120. The width of the cutout 120 is thinner than that of the cutout 120 to minimize the deterioration of the rigidity of the plate 100 due to the formation of the cutout 120. The width of the cutout 120 is not made smaller than the length of the cutout 120 by a ratio of 50: 1, but the effect of preventing thermal deformation and cracks due to the cutout 120 is insufficient.

Another method is to combine the method of adjusting the thickness of the plate 100 and the method of forming the cutout 120 on the outer side of the plate 100. 8, the outer diameter of the plate 100 on which the cutout 120 is formed becomes thicker toward the outer edge, and the diameter of the inner diameter of the plate 100 on which the cutout 120 is not formed has a constant thickness. As described above, the thickness of the outer diameter portion of the plate 100 in which the thermal expansion of the plate 100 is greatly increased is increased, and the cut portion 120 is formed, thereby preventing the plate 100 from being thermally deformed and cracked. In this case, the thickness of the neck portion of the plate 100 is formed at a ratio of 200: 1 with respect to the diameter of the plate 100, and the outer edge of the outer diameter portion of the plate 100 is formed at a ratio of 100: do. The diameter of the cervical portion in the plate 100 is set to a length ratio of 16:13 with respect to the diameter of the plate 100 in consideration of the position of the electric steel plate coil C, The thickness should be constant up to the length of the 16:13 ratio. The thickness of the plate 100 from the inside of the outside diameter portion to the outside of the outside diameter portion successively increases from the ratio of 200: 1 to the plate diameter to the length of 100: 1 ratio.

3A is a sub-plate 200 according to an embodiment of the present invention.

A circular first hollow portion 130 having a diameter of 4: 1 with respect to the diameter of the plate 100 is formed on the plate 100, The plate 100 is formed at the center thereof and is coupled to the lower surface of the plate 100 to form a second hollow portion 230 having the same diameter as that of the first hollow portion 130, The diameter of the plate 100 is equal to the diameter of the plate 100, and the diameter of the subplate 200 is in the form of a circular wire mesh.

A circular first hollow portion 130 having a diameter of 4: 1 with respect to the diameter of the plate 100 is formed in the plate 100. The first hollow portion 130 is formed to be smaller than the diameter of the hollow portion of the coil of the electric steel plate C so that the load of the coil of the electric steel plate C is applied to the plate 100, It is preferable to disperse all over.

Further, the coil support 10 may further include a sub-plate 200 formed in a circular shape. The sub-plate 200 serves to ensure the air permeability of the lower portion of the electric steel plate coil C together with the inner hole 110 of the plate 100. The sub-plate 200 is made of a wire mesh. Air is introduced through the hollow space of the wire net, and the inflow air enters the inner hole 110 to provide ventilation to the lower portion of the electric steel sheet coil C. Referring to FIG. 3A, the diameter of the sub-plate 200 may be the same as the diameter of the plate 200. The thickness of the sub-plate 200 may be less than the thickness of the plate 200 and may be 250: 1 in relation to the diameter of the plate 200. The second hollow portion 230 is formed in the sub-plate 200 as a structure corresponding to the first hollow portion 130. The diameter of the second hollow portion 230 is the same as the diameter of the first hollow portion 130. As shown in FIG. 4, the sub-plate 200 may be coupled to the lower surface of the plate 100.

FIG. 3B shows another embodiment of the sub-plate 200. FIG. A symmetrical cutout 220 having a shape corresponding to the cutout 120 of the plate 100 may be formed at the outer periphery of the subplate 200. [ The cut portion 120 of the plate 100 can be provided with improved ventilation through the symmetrical cut portion 220 so that the thermal deformation of the cut portion 120 of the plate 100 can be minimized. The size of the symmetrical cutout 220 of the sub-plate 200 may be the same as the size of the cutout 120. Also, the wire mesh plate 200 may be provided with a symmetrical auxiliary cutout 240, which will be described later, along with a description of the auxiliary cutout 240 to be described later.

Fig. 5 shows a plurality of inner holes 110. Fig.

The coil base 10 according to the embodiment of the present invention is characterized in that the plurality of inner holes 110 are formed such that the distance between the centers of two adjacent inner holes 110 is 50: And a length of a row of adjacent rows of the plurality of rows is set to a length of a ratio of 50: 1 with respect to a diameter of the plate 100, The holes 110 are formed to be staggered with respect to each other.

The inner holes 110 are formed so as to be spaced apart from each other by a predetermined distance from the surface of the plate 100 as a whole. The inner holes 110 are formed to be staggered with respect to each other so as to be spaced apart from each other. The inner holes 110 are formed at regular intervals from each other, so that the load of the coil C is constantly applied to the surface of the plate 100.

To describe the arrangement of the inner holes 110, the plurality of inner holes 110 are formed in the plate 100 in such a structure that a plurality of rows are arranged parallel to each other. Referring to FIG. 5, FIG. 5 is an enlarged view of a part of a plurality of inner holes 110, in which one column is represented by a dotted line. The distance A between the centers of two adjacent inner holes 110 in one row is a length of 50: 1 ratio to the diameter of the plate 100. When the distance A between the centers of the inner holes 110 is smaller than the length of the ratio of 50: 1 with respect to the diameter of the plate 100, the stress applied to the plate 100 due to the load of the electric steel plate coil C is large The effect of canceling the frictional force between the coil supporter 10 and the electric steel plate coil C due to the thermal expansion of the coil is reduced when the length of the coil support 10 is larger than the length of the ratio of 50: It is preferable that the distance A between the centers of the inner holes 110 is 50: 1 ratio with respect to the diameter of the plate 100. The distance B between adjacent two rows is a length of 50: 1 ratio with respect to the diameter of the plate 100. The stability of the coil receiving base 10 can not be secured when the length of the interval B of the rows is shorter than the length of the ratio of 50: 1 to the diameter of the plate 100, like the interval A between the centers of the inner holes 110, The distance B between adjacent two rows is preferably 50: 1 in relation to the diameter of the plate 100, since the frictional force canceling effect is reduced when the length of the plate 100 is larger than the length of the plate 100 by a ratio of 50: 1 .

In the case where the temperature of the heat treatment furnace is in the range of 900 ° C. to 1000 ° C., the coil base 10 according to the embodiment of the present invention includes the plurality of cutouts 120, Wherein the width of the cutout portion 120 is set to a length of 25: 1 with respect to the length of the cutout portion 120, and each time the temperature of the heat treatment furnace is increased by 100 DEG C, 120 are increased by two, and the width of the cutout 120 is increased by a length of the length of the cutout 120 by a ratio of 100: 1.

The cutout 120 is intended to prevent twisting or cracking in the thermal expansion of the inside and outside of the plate 100 as described above. Therefore, since the degree of thermal expansion varies depending on the maximum temperature of the process of high temperature annealing of the electric steel sheet coil C, the number of the cutouts 120 must be changed. If the maximum temperature of the high-temperature annealing process is low, the degree of thermal expansion becomes small, so that the number of the cutouts 120 is reduced.

When the high-temperature annealing temperature is in the range of 900 占 폚 to 1000 占 폚, a plurality of cut-out portions 120 are formed at equal intervals of twelve. At this time, the width of the cutout 120 is formed to a length of 25: 1 ratio with respect to the length of the cutout 120. When the width of the cutout 120 is less than the length of the cutout 120 in a case where the number of the cutouts 120 is 12 and the length of the cutout 120 is less than the length of the cutout 120, The width of the cut-out portion 120 is set to a ratio of 25: 1 with respect to the length of the cut-out portion 120 because the area of the cut-out portion 120 occupied by the cut- As shown in FIG.

When the upper limit temperature of the high temperature annealing temperature is increased by 100 占 폚 to reach 1100 占 폚, a plurality of cut-out portions 120 are formed at equal intervals. At this time, the width of the cutout 120 is 20: 3 ratio with respect to the length of the cutout 120. When the number of the incisions 120 is 14 and the length of the incisions 120 is less than the length of the incisions 120, the number of incisions 120 occupying the circumference of the plate 100, It is preferable that the width of the cutout 120 is 20: 3 in relation to the length of the cutout 120, because the area of the cutout 120 is reduced to prevent thermal deformation and cracks due to the cutout 120.

When the upper limit temperature of the high temperature annealing temperature is increased by 200 占 폚 to reach 1200 占 폚, 16 cut portions 120 are formed at equal intervals. At this time, the width of the cutout 120 is 50: 1 in relation to the length of the cutout 120. When the width of the cutout 120 is less than the length of the cutout 120 in a case where the number of the cutouts 120 is 16 and the length of the cutout 120 is less than the length of the cutout 120, The area of the incision 120 occupied by the main surface is reduced and the thermal deformation and the crack prevention effect due to the incision 120 are insufficient.

Thus, every time the temperature upper limit range of the high temperature annealing increases by 100 占 폚, the number of the cutouts 120 increases by two, and the width of the cutouts 120 is increased by a length of the ratio of 100: 1 Respectively.

6A-6D illustrate various shapes of the incision 120. FIG.

The width of the coil support 10 according to an embodiment of the present invention is formed in the outer edge of the cutout 120 to have a length ratio of 25: 1 to the length of the cutout 120, The width of the tip of the cutout 120 is 50: 1 in relation to the length of the cutout 120, so that the width of the cutout 120 becomes smaller toward the center of the circle. The edge of the cutout 120 and the edge of the cutout 120 are formed in a streamlined shape.

The width of the coil support 10 according to an embodiment of the present invention from the outer edge of the cutout 120 to the center of the length of the cutout 120 may be about the length of the cutout 120 The width of the end of the cutout 120 from the center of the length of the cutout 120 is 50: 1 to the length of the cutout 120, 1, and the edge formed at the outer edge of the cutout 120 and the edge of the cutout 1200 are formed in a streamlined shape.

6A shows the shape of the incision 120 described above. The edge formed at the outer edge of the plate 100 of the incision portion 120 and the edge formed at the end of the incision 120 can be seen in an angled form. When there is such an angular edge, when a thermal change occurs in the plate 100, a crack starting from the corner causes a warp of the plate 100, and the life of the coil pedestal 10 can be shortened.

6B shows that the edges are formed in a streamlined shape in order to reduce cracks or the like generated at the edges of the cutouts 120. [ The edge formed at the outer edge of the cutout 120 is formed in a streamlined shape in which the width of the cutout 120 is increased and the edge formed at the end of the cutout 120 is curved such that the width of the cutout 120 is reduced And is formed into a streamlined shape. This minimizes the risk of cracking while cutting the plate 100.

The width of the outer edge of the cutout 120 is set to a length of 25: 1 with respect to the length of the cutout 120 and the width of the end of the cutout 120 corresponds to the length of the cutout 120 50: 1 ratio. Accordingly, the width of the incision 120 is reduced from the outer rim of the incision 120 to the end of the incision 120. The width of the cutout 120 formed at the outermost portion of the plate 100 is set to a length of 25: 1 ratio with respect to the length of the cutout 120, considering that deformation due to thermal expansion is more severe at the outer periphery of the plate 100 circle. And the width of the incision 120 is reduced as the plate 100 approaches the center of the circle.

 6C, the width from the outer rim of the incision 120 to the center of the incision 120 is uniformly reduced, and the width formed from the center to the end of the length of the incision 120 is constant . Considering that the thermal deformation and cracking of the coil support 10 are concentrated on the outer periphery of the plate 100, the width of the cutout portion 120 in the outer frame direction is designed to be larger as it gets closer to the outer frame, And the width portion of the remaining cut-out portion 120 is kept constant. The width of the outer edge of the cutout 120 is 25: 1 with respect to the length of the cutout 120 and the width from the center of the cutout 120 to the end of the cutout 120 corresponds to the length of the cutout 120 50: 1 ratio.

When the plate 100 constituting the coil support 10 is formed as a large plate having a diameter of 2500 mm or more and less than 3000 mm, the area of the plate 100 becomes larger than the size of the cutout 120, The effect of the incision 120 that prevents the incision 120 can be reduced. 6D, when the diameter of the plate 100 is 3000 mm or more, the auxiliary cut-out portion 140 can be formed on the plate 100. Auxiliary incisions 140 are formed in the outer rim of the plate 100 between the two incisions 120. [ Since the auxiliary incision part 140 further incises the plate 100, the auxiliary incision part 140 is formed in the cutout part of the auxiliary incision part 140 in the direction of the center of the circle at the outer edge of the plate 100, The length of the auxiliary cut-out portion 140 is formed to be small by allowing the end of the auxiliary cut-out portion 140 to be spaced apart by a length of 25: 1 ratio with respect to the length of the auxiliary cut-out portion 120. On the other hand, the circumferential width of the auxiliary cut-out portion 120 is formed to be eight times the width of the cut-out portion 120 in order to suppress the thermal expansion of the outline rim of the plate 100. At this time, the edge of the auxiliary incision part 140 may be formed in a streamlined shape as in the case of the edge of the incision part 120 described above.

3B shows a symmetry auxiliary cut-out 240. FIG. The sub-plate 200 may have a symmetrical auxiliary cut-out portion 240 as a configuration corresponding to the auxiliary cut-out portion 140 described above. The symmetry auxiliary cutout 240 functions in the same manner as the symmetrical cutout 220 in that the air introduced through the symmetry auxiliary cutout 240 provides enhanced ventilation to the auxiliary cutout 140 of the plate 100 So that thermal deformation of the auxiliary cut-out portion 140 of the plate 100 can be minimized.

10: coil support 140: auxiliary cutout
100: Plate 200: Subplate
110: inner hole 220: symmetrical incision part
120: incised portion 230: second hollow portion
130: first hollow portion 240: symmetrical auxiliary incision portion
C: Electric steel coil

Claims (7)

A coil support for a high-temperature annealing coil having a temperature in a range of 900 to 1200 占 폚,
A circular plate having a predetermined length;
An inner hole formed to have a diameter of a ratio of 100: 1 with respect to the diameter of the plate, the inner hole being spaced apart from the plate; And
And a cutout portion linearly cut from the outer rim of the plate toward the center and spaced apart from each other along the outer rim,
The circumferential width of the cutout portion is formed to a length of 50: 1 ratio with respect to the length of the cutout portion,
The length of the incision part is formed to have a length of 8: 1 ratio with respect to the diameter of the plate, an end of the incision part is formed by the length of the incision part from the outer rim,
Wherein a thickness of the plate is formed to a length of a ratio of 200: 1 with respect to the diameter of the plate. The method according to claim 1,
The plate is provided with a circular first hollow portion having a diameter of 4: 1 with respect to the diameter of the plate at the center of the plate,
A second hollow portion having the same diameter as that of the first hollow portion, the thickness being in a ratio of 250: 1 with respect to the diameter of the plate, the diameter being formed to be equal to the diameter of the plate And further comprising a subplate in the form of a circular wire net. The method of claim 2,
The plurality of inner holes are formed of a plurality of rows parallel to each other formed in one direction so that a distance between centers of adjacent two inner holes is a length of a ratio of 50: 1 with respect to the diameter of the plate,
Wherein a distance between adjacent rows of the plurality of rows is formed to a length of a ratio of 50: 1 with respect to the diameter of the plate,
And the inner holes of the rows adjacent to each other are formed to be staggered with respect to each other. The method of claim 3,
When the temperature of the heat treatment furnace is in the range of 900 캜 to 1000 캜,
Wherein the plurality of cutouts are twelve cutouts spaced at equal intervals from each other, the width of the cutouts being 25: 1 in length relative to the length of the cutouts,
Wherein each time the upper limit temperature of the heat treatment furnace is increased by 100 DEG C, the number of incisions increases by two, and the width of the incisions decreases by a length of a ratio of 100: 1 with respect to the length of the incisions. The method of claim 3,
Wherein a width of the end portion of the incision portion is set to a length of a ratio of 50: 1 to the length of the incision portion, The width of the incision portion becomes smaller toward the center of the circle,
Wherein a corner formed at the outer rim of the incision portion and an edge of the end portion of the incision portion are formed in a streamlined shape. The method of claim 3,
The width from the outer rim of the incision to the center of the length of the incision is uniformly reduced to a length of the ratio of 50: 1 at a ratio of 25: 1 to the length of the incision,
The width of the end of the incision from the center of the length of the incision is formed to a length of 50: 1 ratio with respect to the length of the incision,
Wherein a corner formed at the outer rim of the incision portion and an edge of the end portion of the incision portion are formed in a streamlined shape. The method according to claim 1,
The plate is divided into an inner diameter portion having a diameter of 16: 13 ratio with respect to the plate diameter with respect to the center of the plate, and an outer diameter portion having the incision portion outside the inner diameter portion,
The thickness of the outer diameter portion is set to a length of 200: 1 ratio with respect to the diameter of the plate at the inner side of the inner diameter portion and the inner diameter portion of the inner diameter portion, and the thickness of the outer rim is 100: Wherein the thickness of the plate increases from the inside to the outside of the outer diameter portion.

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