JPH089046B2 - Manufacturing method of heating roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The disclosed technology belongs to the technical field of manufacturing a roll that performs roll forming while heating or cooling.

<Summary of summary> Thus, in the present invention, when a steel material, a resin material, or the like is roll-formed, a cover cylinder having a circular cross-section or the like is formed in the interior of the heating roll during heating and cooling of the material to be rolled. A cylindrical core or the like is fitted to the core, and a spiral or meandering long-stroke heating channel or cooling channel is formed on the surface of the core between the cover cylinder and the core. The present invention relates to a method for manufacturing a heating roll for molding or the like, and in particular, the heating flow path is formed in a continuous flow path of a long stroke from the start end to the end, while the cover cylinder has sufficient strength. The present invention relates to a method for producing a heating roll by applying a ring thermal contraction method to a cover cylinder formed of a thin cylinder and tightly bonded to a core.

<Prior Art> As is well known, a plate material made of a steel material or a resin material is often used in various mechanical devices, and the seed plate material has an extrusion molding method or the like, but a roll molding method using a roll is also widely used. There is.

Therefore, it is often necessary to apply heating or cooling to the material in relation to the feed material at the time of the seed roll forming, in which case a heating roll or a cooling roll is used. There is a mode in which a heat exchange flow path is formed between the inner and outer cylinders or a jacket is formed so as to impart the heat exchange function of heating or cooling.

<Problems to be Solved by the Invention> However, it is extremely difficult to form a heating channel and a cooling channel in the seed roll by machining, and in particular, the invention disclosed in JP-A-60-30561 is disclosed. As described above, it is extremely difficult to form the flow path in the sleeve, and as a result, there is a problem that the cost becomes high. Therefore, the flow path is formed on the outer surface of one core body, and On the other hand, a roll with a cover tube fitted has been put into practical use, but when the cover tube is fitted to the core body that forms the flow path, if the wall thickness of the cover tube is large, strength is maintained, but heat exchange There is a drawback that performance is not good.

On the other hand, when the cover cylinder is formed of a thin-walled cylinder, the heat exchange performance is good, but the strength is insufficient and there is a disadvantage that the cover cylinder sinks into the flow path.

<Object of the Invention> An object of the present invention is to solve the problem of the heating roll in which the cover cylinder is fitted on the core body based on the above-mentioned conventional technique, and to have a sufficient heat exchange function on the surface of the core body. Manufacture of an excellent heating roll that is useful in the field of molding technology application in the machine manufacturing industry by allowing the cover tube to be fitted to the core body having sufficient strength while forming a heating flow path It is intended to provide a method.

<Means and Actions for Solving the Problem> In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned object and has the scope of the above-mentioned claims, is provided outside the core body such as a columnar shape such as a circular cross-section in advance. A spiral or serpentine predetermined shape of heating and cooling passages is formed in a predetermined manner, a cover cylinder is formed in a predetermined manner, and the cover cylinder is placed in a predetermined layer on the cover cylinder so as to be overlaid relative to the cover cylinder. Sets the heating device of the high-frequency induction heating device in an annular shape, and sets the cooling device such as a shower ring with tap water in an annular shape in front of and behind it, and these annular heating device and the annular cooling device are installed in the longitudinal direction of the cover cylinder. The cover tube tries to expand due to annular heating by moving it at a predetermined speed along the direction, but it is constrained by annular cooling and plastically deforms due to strength reduction due to annular heating, and finally yields. The cover cylinder is reduced in diameter and tightly connected to the core body, and the cover cylinder is overall tightly connected to the core body by moving the annular heating and the annular cooling in the axial direction. Maintains the initial molding posture, heating fluid or cooling fluid is passed through the heating flow path during operation, and in the prescribed molding of the heating roll,
The technical means is provided so as to give a predetermined heating action and cooling action to the work piece.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 In the embodiment of the basic example below, as shown in FIG. 4, the interior material 2 is relatively overlaid on the exterior material 1 to form the raw material 3, and then the exterior material 1 as shown in FIG. Heating device 4 such as high frequency induction heating device
And the cooling devices 5 and 5 such as a showering device with tap water are also set in an annular shape while being separated from each other in the axial direction by a predetermined distance, and at a predetermined speed as shown by an arrow on the material 3. When relatively moved, if the exterior material 1 has a short tubular shape and the front and rear ends are free ends, it tries to expand due to annular heating, but the expansion and contraction is restrained by annular cooling before and after that, and the annular heating occurs. As a result, as shown in FIG. 7, the annular bending causes a holding bending moment F to act to hold down the interior material 2, eventually yielding, and the exterior material 1 becomes an interior material. The diameter is reduced to 2 and tightly bound, and since the heating and cooling are moved in the axial direction by the annular heating and the annular cooling, heating and cooling act on the entire material 3. Therefore, as shown in FIG. 1 is tightly bonded to the interior material 2 as a whole. Material 6 is formed.

Next, the first embodiment according to the aspect of the basic embodiment described above,
Referring to FIGS. 2 and 3, the illustrated embodiment is a mode of a heating roll device used for roll forming of a resin material.
In the embodiment shown in the drawings, a series of long-stroke spiral heating channels 7 are formed in advance on the outer surface of a pillar-shaped stainless steel core body 2'by a predetermined mechanical cutting process, The starting end portion and the terminating end portion are connected to the heating fluid supply / discharge pipe 8 inserted through the front and rear portions of the core body 2 ′ through connection flow paths 9, 9.

Then, the core body 2'is relatively laminated on the cover cylinder 1 ', which is also a thin cylinder made of stainless steel, and high frequency induction heating is applied to a predetermined portion of the cover cylinder 1'as in the case of the basic embodiment. The heating device 4 such as a device is set in an annular shape, and the cooling devices 5, 5 such as a tap water showering device are also set in an annular shape before and after the heating device 4 by a predetermined distance, and integrated by an appropriate bracket to cover the same. By moving the cover cylinder 1'in the axial direction at a predetermined speed with respect to the material 3'with the core body 2'which is overlaid on the cylinder 1 ', the cover cylinder 1'will tend to expand in diameter, but the annular cooling device 5, The cover cylinder 1 ′ whose bulging diameter is restrained by 5 and whose strength is lowered by annular heating is plastically deformed, finally yields, and is reduced in diameter in the same manner as the embodiment of the above-described principle embodiment and tightly bound to the core body 2 ′.

The cover cylinder 1'is wholly fastened to the core body 2'by the annular heating action and the annular cooling action relatively moving in the axial direction.

However, since the cover cylinder 1'has a certain degree of strength, it does not sink into the spiral flow path 7, and is formed between the outer peripheral surface of the core body 2'and the inner surface of the cover cylinder 1 '. The spiral heating flow path 7 can maintain the initial shape sufficiently.

Then, the heating roll 10 is obtained in this way,
For example, when a predetermined heating fluid is passed through the heating fluid supply / exhaust pipes 8 when it is used as a forming roll during rolling of a plastic sheet, the heating fluid passes through the spiral heating flow path 7, and thus the cover cylinder. 1'provides a heating effect to the compressed sheet which is heated and roll-formed, so that the desired hot-roll molding is performed.

Next, in the embodiment shown in FIG. 3, a meandering cooling passage 7'is formed on the outer surface of the core body 2 ', which is different from the spiral heating passage 7 described above. The ends are connected to heating fluid supply / discharge pipes 8 ', 8'via communication passages 9', 9 '.

A heating roll in which the cover cylinder 1'is also tightly tightened to the core body 2'by the ring thermal contraction method as in the above embodiment.
Get 10 '.

In this embodiment, the roll is used as a papermaking roll, and a predetermined cooling fluid is passed through the heating / discharging passage 7'of the meandering flow passage through the supply / discharge pipes 8'and 8 '. The sheet can be formed and rolled.

It should be noted that the embodiment of the present invention is not limited to the above-mentioned embodiments, and for example, a large number of spline-shaped notches along the axial direction are preliminarily formed in the upper surface of the cover cylinder in parallel with the axial direction. It is possible to employ equiaxed aspects that may be stored.

Further, it goes without saying that the rolling material to be applied is not limited to the resin material but can be applied to a metal material such as steel material.

<Effects of the Invention> As described above, according to the present invention, in the method of manufacturing a heat forming roll that is basically used for roll forming of a resin material, a steel material, or the like, the outer surface of the core body that is fitted inside the cover cylinder is fitted. Forming to form a heating channel or a cooling channel on the outer surface of the core in a heating roll having a continuous heating channel having a long stroke such as a spiral or a cooling channel. In addition, since the cover cylinder is made of a thin-walled cylinder, the heat transfer efficiency for heating and cooling the material to be molded at the time of roll forming is good, so the desired rolling It has an excellent effect that molding can be performed exactly as designed.

Further, by forming the cover cylinder with a material having a predetermined strength, corrosion resistance, and wear resistance, the strength of the cover cylinder is reduced even when a predetermined heating fluid or cooling fluid flows through the heating passage formed in the core body. There is an effect that contributes to the durability that no wear or abrasion occurs.

Thus, when manufacturing the heating roll, by applying annular heating and annular cooling before and after the cover cylinder to use the ring thermal contraction method, it is possible to securely reduce the diameter of the cover cylinder to the core body. Therefore, there is an advantage in that there is no risk of misalignment or the like between the cover cylinder and the core during operation during roll forming.

Further, the annular heating and the annular cooling are partial heating and cooling, but by moving in the axial direction, the entire heating action and cooling action can be performed at the same time,
It is possible to skillfully bond the cover cylinder to the core body by giving a thermal expansion diameter and its restraint by the annular heating of the cover cylinder, and plastic deformation and yielding. Therefore, it was formed on the outer surface of the core body. The heating and cooling flow paths are effectively disconnected from each other and a series of serial flow paths are maintained to promote the heat exchange function.

[Brief description of drawings]

1 to 3 are explanatory views of an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of one embodiment, FIG. 2 is a partial cutaway perspective view of the same, and FIG. 3 is a part of another embodiment. Cutaway perspective view, 4, 5, 6, 7
The figure is a partial cutaway perspective view of the basic embodiment. 1 '... cover cylinder, 2' ... core, 7,7 '... heating flow path, 10, 1
0 '... heating roll, 4 ... annular heating device, 5 ... annular cooling device

Claims (1)

[Claims] 1. A manufacturing method of a heating roll in which a cover cylinder and a core body fitted in the cover cylinder form a long-stroke heating or cooling passage between the cover cylinder and the surface of the core body. In the method, a cover cylinder of a thin-walled cylinder is relatively overlaid on the core body, and annular heating and annular cooling before and after that are applied to a predetermined portion of the cover cylinder to move the cover cylinder to the core body in the axial direction. A method for producing a heating roll, characterized in that the heating roll is tightly bound.