JPH031471Y2 - - Google Patents

Description

[Detailed explanation of the idea]

INDUSTRIAL APPLICATION FIELD This invention relates to a deformation prevention device during heat treatment of a metal coil, which prevents deformation of the coil caused by its own weight during heat treatment of the metal coil. Conventional technology Conventionally, when heat treating a metal coil such as an aluminum coil, the coil is oriented sideways, that is, the axial direction is horizontal, and the coil is suspended at the core and supported in a furnace, etc. Because it was heat treated, it had the following drawbacks. The problem that the invention aims to solve is that during heat treatment, due to the action of the coil's own weight,
As shown by the chain line in Figure 6, the upper part _C1 of the coil C sinks and becomes smaller in diameter, while the lower part _C2 of the coil bulges downward and becomes larger in diameter, which tends to significantly impair the roundness of the coil. . When a coil with such deformation is fed to the next process, such as cutting, printing, or laminating with film or paper, tension fluctuations occur when the coil is unwound, causing wrinkles and breakage. There were flaws. Furthermore, such deformation occurs more markedly in coils with a large amount of winding, in which the outer diameter of the coil C is about twice or more the inner diameter, that is, the outer diameter of the winding core 13. However, as a measure to prevent the metal coil from deforming during heat treatment in order to eliminate this drawback, it has been proposed to arrange the coil vertically so that the axial direction of the winding core is up and down. There is a risk that each part of the winding of the coil may move in the width direction, causing a winding misalignment condition.Furthermore, if the end face of the coil is restricted and supported and heat treated to prevent the winding misalignment from occurring, scratches may occur on the coil end face. death,
This resulted in new drawbacks such as the risk of breakage occurring during unwinding of the coil. This invention was made based on this technical background, and the purpose is to prevent deformation of a metal coil during heat treatment and maintain the roundness of the coil, and to provide a deformation prevention device for this purpose. This is what I am trying to do. Means for Solving the Problems This invention, as shown in the embodiments of FIGS. It consists of a belt-shaped support member 2,
The support member 2 has the flexibility to be deformed into an arc shape along the outer circumference of the metal coil C, and has heat resistance and strength to support the metal coil C in a suspended state by supporting the circumferential surface C ₃ during heat treatment. The object of the present invention is to provide a device for preventing deformation during heat treatment of a metal coil, which is characterized in that it is formed in a device having a metal coil. When the hanging rod 1 is in use, for example, as shown in FIG. 3, support frames 13,
Since both ends are supported in a horizontal state between the support frames 13, the support frame 13 is formed to have a sufficient length to be placed between the support frames 13, 13. Moreover, since the metal coil is held in a suspended state, the material or thickness of the metal coil is selected so as to have enough strength to withstand the weight of the metal coil. In the illustrated embodiment, the support member 2 has a width shorter than the length of the hanging rod 1, and has a metal coil C.
The width is set to be the same as or slightly larger than the width of the . Further, its length is set to be slightly shorter than the outer circumference of the metal coil. Both end portions in the length direction are attached to the intermediate portion of each hanging rod 1 in the length direction in a wrapped state. This support member 2 supports the peripheral surface C ₃ of the metal coil C in a holding state and holds it in a suspended state during heat treatment,
For this reason, it is formed to have flexibility so that it can be deformed into an arc shape along the outer periphery of the metal coil. It is also necessary to have sufficient heat resistance against the heat treatment temperature and sufficient strength against the weight of the coil. The support member 2 having such flexibility, heat resistance, and strength may preferably be made of a combination of stainless steel net and glass cloth, but is not limited to this, and may be used depending on the application. The material and structure can be appropriately selected in consideration of the heat treatment temperature, weight, etc. of the metal coil to be used. Note that the heat treatment temperature for the metal coil is generally about 200°C or higher. To put the deformation prevention device of the illustrated embodiment into use, first place the metal coil C in a horizontal state with its axial direction horizontal on the support member 2, and then lift the hanging rods 1, 1 using a suitable lifting means. Third
As shown in FIG. 4, both ends of each hanging rod are placed on support frames 13, 13. Since the support member 2 has flexibility, the metal coil C
It deforms into an arc shape along the circumferential surface of the coil to support the coil. In this case, as shown in Figure 4, 2
The space between the book hanging rods 1 and 1 is narrowed as much as possible and the support member 2
If the contact range between the support member and the circumferential surface of the metal coil C is secured as large as possible, the distance between the hanging rods 1 and 1 will be wide, as shown in FIG. This is preferable in that it can prevent deformation of the upper part of the coil more effectively than a case where it is small. Effects of the invention According to the deformation prevention device according to the invention, since the supporting member supports the peripheral surface of the metal coil and holds the coil in a suspended state, the peripheral surface of the metal coil in contact with the supporting member is A force from the member acts on the surface in a direction to maintain the circular shape of the coil. Therefore,
Not only when the amount of turns of the coil is small, but even when the amount of turns is large, where the outer diameter of the coil is more than twice the inner diameter of the coil, deformation of the top and bottom due to the coil's own weight, which conventionally occurs, can be avoided. This can be reliably prevented and the roundness can be maintained, and as a result, even when unwinding in the next process such as cutting or printing, wrinkles and breaks due to tension fluctuations can be avoided. Example Next, an example of this invention will be shown. Two types of aluminum coils were produced by wrapping aluminum foil with a thickness of 7 μm around two steel pipes with an outer diameter of 80 mm at winding lengths of 12,000 m and 24,000 m, respectively. Next, each of the above aluminum coils was supported in a suspended state in the manner shown in FIGS. 3 and 4 using a deformation prevention device whose supporting member was a combination of a stainless steel net and a glass cloth. , heat treatment was performed at 350°C for 20 hours. The amount of coil deformation after heat treatment was then measured. On the other hand, regarding the same aluminum coil as above,
Heat treatment was performed under the same conditions using the conventional method of lifting the core portion without using a deformation prevention device, and the amount of deformation was also examined. The results are shown in the table below.

[Table] As is clear from the above results, it was confirmed that the deformation prevention device according to this invention significantly suppresses the deformation of the coil during heat treatment. Further, when we investigated the amount of coil deformation that does not cause wrinkles during unwinding, it was found that the amount of deformation of the coil should be approximately 2 mm or less, and this condition can be satisfied with the present device.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the deformation prevention device in use, Figure 2 is a perspective view of the deformation prevention device, Figure 3 is a side view of the deformation prevention device in use, and Figure 4 is the - line in Figure 3. The cross-sectional view, FIG. 5, shows a modified example of the usage state, and the cross-sectional view seen from the same direction as FIG. 4, and FIG. 6 is a front view of the coil for explaining the problems of the prior art. 1...Hanging rod, 2...Supporting member, C...Metal coil, _C3 ...Surrounding surface.

Claims (1)

[Scope of utility model registration request] It consists of two hanging rods and a band-shaped support member with both ends attached to each hanging rod. 1. A device for preventing deformation during heat treatment of a metal coil, characterized in that the device is made of a material having heat resistance and strength capable of supporting the circumference of the metal coil and supporting the metal coil in a suspended state.