JPH061716B2 - Roll device manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roll device having a magnetic flux generating mechanism.

[Conventional technology]

A conventional device of this type is disclosed in, for example, Japanese Patent Laid-Open No. 59-56387, and a conventional device improved from this is shown in FIG. In Fig. 5, (1) is a fixed shaft and 2 is this fixed shaft.
The magnetic flux generation mechanism attached to (1), (3) this magnetic flux generation mechanism
A hollow roll which is disposed on the outer peripheral side of (2) and is rotatably supported on the identification shaft (1) via a bearing mechanism (4) consisting of a bearing (4a) and a bracket (4b).

Next, the operation will be described. Rolled by the alternating magnetic flux generated by the magnetic speed generation mechanism (2) mounted on the fixed shaft (1)
A current is induced in (3), and the current is used to heat the roll (3).

As a cooling structure of this roll (3), for example, JP-A-55-1220
There is one shown in Japanese Patent No. 37. This is to place the selected heat pipes in the mold of the secondary conductive layer ring concentrically and corresponding to the roller shell at appropriate intervals,
It is cast with a conductive material such as aluminum to form the secondary conductive layer ring.

The outer diameter of the secondary conductive ring manufactured in this manner is determined so as to be in close contact with the inner diameter of the roller shell, and according to the heat radiation amount and the load amount from the outer surface of the roller shell, Surface circumferential grooves are appropriately formed so that the amount of heat transfer from the secondary conductive ring to the roller shell is adjusted. After that, the secondary conductive ring is closely fitted to the roller shell, and is adhesively fixed by means such as silver brazing.

Also, there is one in which a heat pipe is sequentially welded so as to be in close contact with the inner peripheral surface of the roller shell.

[Problems to be solved by the invention]

However, in the above-mentioned conventional device, the adhesiveness between the roll (3) and the secondary conductive ring in which the heat pipe is cast, and the adhesiveness between the roll (3) and each heat pipe cannot be said to be sufficient. Since there is a thermal resistance between the two, there is a problem that the cooling ability of the roll (3) is suppressed.

The present invention has been made to solve the above problems, and an object thereof is to provide a method for manufacturing a roll device in which almost no thermal resistance occurs.

[Means for solving problems]

The manufacturing method according to the present invention is a step of providing a plurality of through holes along the axial direction in a hollow roll rotatably supported by a fixed shaft through a bearing mechanism in a substantially concentric shape, and having a diameter smaller than the diameter of the through hole. Step of inserting the heat pipe tubing into the through-hole, expanding the heat pipe tubing to bring the roll and the heat pipe tubing into close contact with each other, and subsequently sealing both ends of the heat pipe tubing following the integrated contacting step. And a step of forming a heat pipe by sealing a predetermined amount of an evaporative working liquid therein.

[Action]

The manufacturing method in the present invention, the heat pipe pipe material is inserted into the through hole of the roll, the heat pipe pipe material is expanded to closely adhere the roll and the heat pipe pipe material, and both ends thereof are sealed and have an evaporating property inside. A predetermined amount of working liquid is enclosed to form a heat pipe.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a longitudinal sectional view of an essential part showing a state before expansion of the heat pipe pipe material, and FIGS. 2 and 3 are longitudinal sectional views of an essential part showing a state of the heat pipe pipe material after expansion, a front view, FIG. 4 is a vertical sectional view showing a state after the heat pipe is formed. First, a plurality of through holes (5a) along the axial direction are formed in the hollow heel (5) substantially concentrically in the circumferential direction, and the through holes (5a) are formed in the through holes (5a) of the roll (5). Insert heat pipe tubing (6) with a diameter smaller than the diameter. Next, the heat pipe pipe material (6) is expanded. Expansion tool (7) inside one end of heat pipe tubing (6)
Is pushed forward while expanding the pipe to the other end side of the heat pipe pipe material (6) by pressing force. By the way, for example, the roll (5) is made of iron and the heat pipe pipe material (6) is made of copper. Therefore, since copper is softer than iron, when the heat pipe pipe (6) is expanded, the outer surface of the heat pipe pipe (6) is crushed and firmly adhered to the through hole (5a) of the roll (5) to bond. As a result, the bonding force between the two becomes large and the adhesion becomes very good, and the thermal resistance between the two can be significantly reduced. This is because it is generally considered to insert a heat pipe into the through hole (1a), but an adhesive is interposed between the heat pipe and the through hole for the purpose of fixing and adhering the heat pipe. , In this case, the adhesive strength can meet the necessary conditions, but the adhesiveness does not allow a complete integrated structure between them, and the adhesive has a bubble portion and the adhesive does not have a gap between the two. It becomes very difficult to completely fill, the thermal resistance becomes large and the cooling capacity is limited. But,
According to the manufacturing method of the present invention, since it is possible to completely adhere the both, it is no exaggeration to say that thermal resistance can be eliminated. After completing the above pipe expansion work,
As shown in the figure, in this state, both ends of the heat pipe pipe material (6) are sealed by the sealing pieces (8), and a working liquid having evaporative properties such as CFCs, ammonia, water, etc. is located inside. When a fixed amount is enclosed, as shown in Fig. 4, the heat pipe
(9) can be configured. Since this heat pipe (9) has no heat resistance at its joint, the heat efficiency is improved and the cooling characteristics are very excellent. As a result, the cooling characteristics of the roll (5) can be improved.

Further, in the above embodiment, the case of expanding the heat pipe tube material is described as extruding tube expansion, but the heat pipe tube material may be expanded by drawing expansion tube. Further, without using a pipe expanding tool, the heat pipe pipe material may be expanded by applying pressure such as pouring pressure or water pressure, and the same effect as the above-mentioned embodiment is obtained.

〔The invention's effect〕

As described above, according to the present invention, a step of providing a plurality of through holes along the axial direction in a hollow roll rotatably supported by a fixed shaft through a bearing mechanism in a substantially fixed concentric circle, and a diameter smaller than the diameter of the through hole. The step of inserting the heat pipe tubing into each of the through holes, the step of expanding the heat pipe tubing to bring the roll and the heat pipe tubing into close contact with each other, and the both ends of the heat pipe tubing following the integrated contacting step. By providing a step of forming a heat pipe by sealing a predetermined amount of a working liquid having vaporizing property inside and sealing it, the adhesion between the heat pipe pipe material and the roll becomes very good, and both The thermal resistance between them can be remarkably reduced, and a roll device having very excellent cooling characteristics can be manufactured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of an essential part showing a state before pipe expansion according to a method for manufacturing a roll device according to an embodiment of the present invention, and FIGS. 2 and 3 are pipe expansions according to the present invention. FIG. 4 is a longitudinal sectional view of an essential part showing a state after that, FIG. 4 is a longitudinal sectional view of an essential part showing a state after forming the heat pipe according to the present invention, and FIG. 5 is a longitudinal sectional view showing a conventional roll device. In the figure, (5) is a roll, (5a) is a through hole, (6) is a heat pipe pipe material, and (9) is a heat pipe. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A step of providing a plurality of through holes along an axial direction in a hollow roll rotatably supported by a fixed shaft through a bearing mechanism in a substantially concentric shape, and a heat pipe having a diameter smaller than the diameter of the through holes. A step of inserting a tubular material into each of the through holes, a step of expanding the heat pipe tubular material to bring the roll and the heat pipe tubular material into close contact with each other, and subsequently sealing both ends of the heat pipe tubular material following the integrated close contact step. And a step of forming a heat pipe by enclosing a predetermined amount of an evaporative working liquid therein, and a method of manufacturing a roll device.