JP2014117731A - Metallic tubular body and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic tubular body having great durability against deformation both in the axial direction and in the circumferential direction, and to provide a manufacturing method thereof.SOLUTION: The rolling direction of an outlined arrow 2 is allowed to be the circumferential direction of a metallic tubular body 4 so that a metal plate is rounded cylindrically. A butting part 41 of the metallic tubular body 4 is subjected to plasma welding (microplasma welding), thereby to integrate the metallic tubular body 4. Rollers 52, 52 are pressed onto the outer peripheral surface 43 of the metallic tubular body 4, and the rollers 52, 52 are moved in the axial direction of the metallic tubular body 4, thereby to perform spinning. The metallic tubular body 4 is narrowed by being plastically deformed in the axial direction of the metallic tubular body 4, and lengthened in the axial direction.

Description

  The present invention relates to a thin-walled metal tubular body and a method for manufacturing the same, and more particularly to a metal tubular body for fixing toner onto paper by applying heat and pressure in a laser printer or a copying machine and a method for manufacturing the same.

  The fixing method of laser printers and copiers has changed from the conventional roller fixing method to the film fixing method. In the conventional roller fixing method, since the heater inside the roller warms the roller, it is necessary to keep the heater on while printing is waiting. On the other hand, a thin fixing film having a high heat conduction efficiency and a low heat capacity can operate with a heater only when the fixing film rotates, so that power saving and standby time can be reduced. As the thin tubular body serving as the base layer of the fixing film, a metal such as stainless steel or a resin such as polyimide is used. However, in order to save power and shorten the standby time, it is preferable to use a metal that is strong and excellent in thermal conductivity.

  At the time of fixing, the cylindrical fixing film rotates while being deformed in the circumferential direction. Accordingly, the fixing film is required to have circumferential flexibility and durability that can withstand deformation. When a metal tubular body is used as the base layer of the fixing film, the thickness is manufactured to an extremely thin thickness of 20 to 50 μm. As a method for producing such an extremely thin metal tubular body, one using a spinning process is known (see Patent Document 1).

  However, in the spinning process of Patent Document 1, since the metal material is extended only in the axial direction of the cylindrical metal tubular body, the durability against axial deformation is great, but the durability against circumferential deformation is small. There are features. Therefore, when used for a long time, there has been a problem that fine cracks enter the axial direction from the end face of the metal tubular body.

JP 2001-225134 A

  An object of the present invention is to provide a metal tubular body having high durability against deformation in both the axial direction and the circumferential direction, and a method for manufacturing the same.

The said subject is solved by the following means.
That is, the metal tubular body of the present invention 1 is a metal tubular body having a thickness of 20 to 50 μm, an inner diameter of 10 to 50 mm, and an axial length of 200 to 400 mm, and the metal tubular body is plastic. It has a processed metal structure, and the processing direction of the plastic processing is at least two directions of a circumferential direction and an axial direction of the metal tubular body.

  The metal tubular body of the present invention 2 is characterized in that, in the present invention 1, the circumferential plastic processing method of the metal tubular body is a rolling process, and the axial plastic processing method is a spinning process. To do.

  The metal tubular body of the present invention 3 is characterized in that, in the present invention 1 or 2, the circumferential plastic working is a pre-process and the axial plastic working is a post-process.

  The method for producing a metal tubular body according to the fourth aspect of the present invention includes producing a metal plate by rolling in one direction, rolling the metal plate into a cylindrical shape so that the rolling direction is a circumferential direction, and abutting the butt portion The metal tubular body is manufactured by welding, and the metal tubular body is spun to be elongated in the axial direction to make it thin.

  The metal tubular body of the present invention is a metal tubular body having a thickness of 20 to 50 μm, an inner diameter of 10 to 50 mm, and an axial length of 200 to 400 mm. It has a structure, and the working direction of plastic working is at least two directions of the circumferential direction and the axial direction of the metallic tubular body. In the metal tubular body of the present invention, the circumferential plastic working method of the metallic tubular body is rolling, and the axial plastic working method is spinning. Therefore, it is possible to manufacture a metal tubular body having a high durability against deformation in both the axial direction and the circumferential direction.

Fig.1 (a) shows the manufacturing method of the metal tubular body of embodiment of this invention, explanatory drawing which shows the process of rolling a metal plate and manufacturing a rolling coil material, FIG.1 (b) is a figure. It is explanatory drawing which shows the process of cut | disconnecting the rolled coil material of 1 (a) and manufacturing a metal plate of a predetermined | prescribed magnitude | size. FIG. 2 is an explanatory view illustrating a process of manufacturing a metal tubular body by rolling the metal plate of FIG. 1B into a cylindrical shape. FIG. 3A is an explanatory view showing a step of spinning the metallic tubular body of FIG. 2, and FIG. 3B is an explanatory view showing a state where the spinning processing of the metallic tubular body is finished.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig.1 (a) shows the manufacturing method of the metal tubular body of embodiment of this invention, explanatory drawing which shows the process of rolling a metal plate and manufacturing a rolling coil material, FIG.1 (b) is a figure. It is explanatory drawing which shows the process of cut | disconnecting the rolled coil material of 1 (a) and manufacturing a metal plate of a predetermined | prescribed magnitude | size. As shown in FIG. 1 (a), in this example, a metal plate (thickness is 0.18 mm) is cold-rolled to obtain a rolled coil material 1 having a thickness T1 of 0.1 mm and a width W1 of 251 mm. To manufacture. Although any metal can be used as the material of the plate material, SUS304 is used in the embodiment of the present invention. The rolling direction of the rolled coil material 1 is the direction of the white arrow 2. The rolled coil material 1 has a hardness of Hv374 and is not annealed.

  As shown in FIG. 1B, the rolled coil material 1 of FIG. 1A is cut to produce a metal plate 3 having a thickness T1 of 0.1 mm, a width W2 of 95 mm, and a length L1 of 148 mm. . The rolled coil material 1 is cut by an etching process that has high dimensional accuracy and hardly generates burrs.

  FIG. 2 is an explanatory diagram illustrating a process of manufacturing the metal tubular body 4 by rolling the metal plate 3 of FIG. 1B into a cylindrical shape. As shown in FIG. 2, the metal plate 3 is rolled into a cylindrical shape and the end faces are butted to manufacture the metal tubular body 4. The rolling direction of the white arrow 2 is set to the circumferential direction of the metal tubular body 4 and rounded into a cylindrical shape. Therefore, the metal tubular body 4 is formed to have a wall thickness T1 of 0.1 mm, an axial length L1 of 148 mm, and an inner diameter D1 of 30.15 mm. The butted portion 41 of the metal tubular body 4 is plasma welded (microplasma welding) to integrate the metal tubular body 4.

  Fig.3 (a) is explanatory drawing which shows the process of spinning the metal tubular body 4 of FIG. That is, as shown in FIG. 3A, the mandrel 51 of the spinning machine is fitted into the inner peripheral surface 42 of the metal tubular body 4, and the mandrel 51 is rotated to rotate the metal tubular body 4. The rollers 52 and 52 are pressed against the outer peripheral surface 43 of the metal tubular body 4, and the spinning is performed by moving the rollers 52 and 52 in the axial direction of the metal tubular body 4. The metallic tubular body 4 is squeezed by being plastically deformed in the axial direction of the metallic tubular body 4 and is elongated in the axial direction. In order to cool the heat generated during the spinning process, a coolant is supplied in the vicinity of the processed part. The temperature of the coolant is preferably set to about 26 to 28 degrees at the coolant outlet.

  FIG. 3B is an explanatory view showing a state in which the spinning process of the metal tubular body 4 has been completed. Spinning is performed twice to complete the thin metal tubular body 6 shown in FIG. The completed metal tubular body 6 is formed with a thickness T2 of 35 μm (0.035 mm), an axial length L2 of 278.5 mm, and an inner diameter D2 of 30 mm.

  As described above, the metal tubular body according to the embodiment of the present invention is a thin-walled metal tubular body that becomes the base layer of the fixing film by plastic working in the circumferential direction and the axial direction of the metal tubular body. Can be manufactured. Therefore, since the durability against deformation in both the axial direction and the circumferential direction of the metal tubular body is increased, the problem that fine cracks enter the axial direction from the end face of the metal tubular body is solved after long-term use. The The metal tubular body according to the embodiment of the present invention welds a metal plate rolled into a cylindrical shape in a thick state, and spins the thick metal tubular body to form a thin metal A tubular body is formed. Therefore, welding is easy, the weld mark is clean, and the cylindrical shape can be accurately formed.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. Needless to say, changes can be made without departing from the scope and spirit of the present invention. For example, in the above-described embodiment of the present invention, the completed metal tubular body has a wall thickness T2 of 35 μm, an inner diameter D2 of 30 mm, and an axial length L2 of 278.5 mm. It can be applied to a metal tubular body having a diameter of ˜50 μm, an inner diameter D2 of 10 to 50 mm, and an axial length L2 of 200 to 400 mm.

DESCRIPTION OF SYMBOLS 1 ... Rolled coil material 2 ... White arrow (Rolling direction)
DESCRIPTION OF SYMBOLS 3 ... Metal plate 4 ... Metal tubular body 41 ... Butt part 42 ... Inner peripheral surface 43 ... Outer peripheral surface 51 ... Mandrel 52 ... Roller 6 ... Metal tubular body

Claims (4)

A metal tubular body having a wall thickness of 20 to 50 μm, an inner diameter of 10 to 50 mm, and an axial length of 200 to 400 mm,
The metal tubular body has a plastically processed metal structure,
The metal tubular body, wherein the plastic working direction is at least two directions of a circumferential direction and an axial direction of the metal tubular body. The metal tubular body according to claim 1,
A metal tubular body, characterized in that a method of plastic processing in the circumferential direction of the metal tubular body is rolling, and a method of plastic processing in the axial direction is spinning. The metal tubular body according to claim 1 or 2,
The metal tubular body, wherein the circumferential plastic working is a pre-process and the axial plastic working is a post-process. Rolling in one direction to produce a metal plate,
The metal plate is rounded into a cylindrical shape so that the rolling direction is the circumferential direction,
Welding the butt to produce a metal tubular body,
A method for producing a metal tubular body, comprising: spinning the metal tubular body to elongate the metal tubular body in the axial direction to make it thin.

Images