JPS6076219A - Composite member and its manufacture - Google Patents

Abstract

PURPOSE:To obtain easily a composite member such as an electrode bar low in manufacturing cost and long in size by lapping an outside material on a core material at their lapping parts through projecting and recessing parts and bringing surely the core material into tight contact with the outside material to fix them together. CONSTITUTION:In manufacturing a composite member from a mettalic inner rod 2 made of copper, etc. and a metallic outer material 1 made of Ti, etc., for instance; projection-recess roll forming is provided to a blank material of the material 1 to form it into a tubular shape having the projecting and recessing surfaces in its inside. In this example, projecting lines 3 are formed on the inner peripheral surface, along the peripheral direction, and at intervals in the longitudinal direction of the outer peripheral material 1, by embossing. Next, the rod 2 is inserted into said tubular body to perform drawing. In this way, the rod 2 is brought into tight contact with the outer material 1 and fixed to the material 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a composite member used, for example, in an electrode rod and a method for manufacturing the same.

[Technical background of the invention and its problems]

Electrode rods used in electrolysis require corrosion resistance as well as conductivity because they are used in solutions. Therefore, as an electrode rod, a composite rod is created by polymerizing and combining an outer tube made of a metal with excellent conductivity such as titanium and corrosion resistance on the outside of an inner rod made of a highly conductive metal such as copper. It is used. An important point for the electrode rod made of this composite rod is that the inner rod and the outer tube are firmly fixed in close contact with each other in order to increase the adhesive strength and conductivity between the two.

On the other hand, recently, large-scale electrolysis has been carried out, and accordingly, long electrode rods are being used. Therefore, it is desired to use the above-mentioned composite rod also in this long electrode rod.

Conventionally, in order to manufacture electrode rods that form composite rods, there are two methods: fixing the inner rod and outer tube using the explosion bonding method, or pouring silver solder between the inner rod and outer tube and fixing them by brazing. There is a way to do it. These methods can reliably fix the inner rod and the outer tube in close contact with each other and produce an electrode rod with good fixing strength and conductivity, but there is a problem in that the manufacturing cost is high. Moreover, with these methods, the limit on the length of composite rods that can be manufactured is as short as about 1 m, and it is difficult to manufacture rods that are longer than that. For this reason, it was not possible to obtain a long electrode rod.

[Invention 11] The present invention has been made in view of the above-mentioned circumstances, and it is possible to securely fix the core material serving as the inner rod and the outer material tightly, and the manufacturing cost is low (long composite rods can be easily obtained). The object of the present invention is to provide a composite member that can be used as a composite member and a method for manufacturing the same.

[Summary of the invention]

The composite member of the present invention is characterized by comprising a core material and an outer material provided on the outside of the core material so as to overlap with the core material, and the overlapping portion is overlapped with irregularities.

The method for manufacturing a composite member of the present invention includes a step of applying unevenness to a material by rolling, a step of forming the material into a tubular body with the textured surface facing inside, and a step of forming a core material into the tubular body. This process is characterized by a step of drawing the material through the material.

The inner rod, which is the core material, and the outer material, which constitute the composite member, are made of a metal that can obtain the properties required depending on the use of the composite member. For example, when using a composite member as an electrode rod for electrolysis, the inner rod is made of a metal with excellent conductivity such as copper, and the outer material is made of a metal with excellent corrosion resistance as well as conductivity such as titanium or stainless steel. to form.

In the composite member of the present invention, the pattern is formed by uneven processing on the inner peripheral surface of the outer member. Examples of the uneven processing include protrusions along the circumferential direction of the outer member; protrusions along the longitudinal direction of the outer member; There are combinations of both of these ridges, and even slanted ridges. In this manner, the pattern 12 formed on the inner circumferential surface of the outer material by the uneven processing engages with the outer circumferential surface of the inner rod, and the inner rod and the outer material can be firmly and closely fixed. Therefore, when the composite member is used for the electrode rod, the adhesion strength and conductivity between the inner rod and the outer member can be increased.

In the present invention, the composite member is manufactured by the following manufacturing method. First, a hoop material made of a predetermined metal is rolled, and a predetermined pattern is formed on the side surface of the hoop material, that is, end processing is performed. That is, a forming roll having a predetermined pattern forming part and a smooth roll are used, and while these rolls are rotated, the hoop material is continuously passed between the two rolls to carry out the rolling process. In this case, the forming roll continuously forms a pattern on the surface of the hoop material using the pattern forming section. The form of the pattern forming portion of the forming roll is set depending on the pattern to be formed on the outer material. Next, the hoop material is formed into a tubular shape by roll forming or the like to form a long outer material. In this case, the embossed surface of the hoop material is the inner peripheral surface of the outer material.

Further, a middle rod made of a long rod made of a predetermined metal is manufactured.

Then, the inner rod is inserted into the inside of the outer material and the drawing process is performed continuously. This drawing process compresses and reduces the diameter of the outer material and the inner rod, and they are tightly fixed. Furthermore, the pattern formed on the inner circumferential surface of the outer material by endless processing closely engages with the outer circumferential surface of the inner rod. In this way, a long composite member is manufactured. This long composite member is used by cutting it into a predetermined length depending on the purpose.

Therefore, if an electrode rod is manufactured by such a manufacturing method of the present invention, a long electrode rod can be manufactured at low cost.

[Embodiments of the invention] Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the composite member of the present invention. In the figure, 1 is an inner rod made of metal such as copper, and 2 is an outer member made of metal such as titanium.

In this embodiment, the protrusions 3 extending along the circumferential direction on the inner circumferential surface of the outer member 2 are formed by engraving at intervals in the longitudinal direction. The inner rod 1 and the outer member 2 can be closely fixed by the protrusions 3, and in particular, the inner rod 1 can be fixed so as not to shift in the longitudinal direction. In order to form the protrusions 3 by embossing, a forming roll having a pattern forming portion forming grooves along the roll axis direction is used when rolling the hood material.

FIG. 2 shows another embodiment. In this embodiment, a plurality of protrusions 4 extending longitudinally on the inner circumferential surface of the outer member 2 are formed in a plurality of discs in the circumferential direction.

In this case, the contact area between the inner rod 1 and the outer material 2 is large,
When used in electrode rods, the conductivity between the two can be increased. In order to form the protrusions 4 by embossing, a forming roll provided with a groove-like pattern forming portion along the circumferential direction of the roll is used.

FIG. 3 shows yet another embodiment. In this embodiment, the protrusions 3 of the embodiment shown in FIG. 1 and the protrusions 4 of the embodiment shown in FIG. 2 are formed on the inner peripheral surface of the outer member 2 in combination. When the composite rod of this embodiment is used as an electrode rod, both the fixing strength and conductivity of the inner rod 1 and the outer member 2 can be improved. In addition,
When forming the protrusions 3 and 4 in one piece, a forming roll having grooves extending in the axial direction and the circumferential direction, respectively, is used.

FIG. 4 shows an embodiment of a composite member in which an inclined protrusion 5 is formed on the inner circumferential surface of the outer member 2. As shown in FIG.

〔Effect of the invention〕

As explained above, according to the present invention, a composite member in which the core material and the outer material are tightly fixed can be obtained at low cost.
Further, long composite rods can be easily manufactured.

[Brief explanation of drawings]

Figure 1 (a), (b), Figure 2 (,), (b)
, Fig. 3(a), (b) and Fig. 4(,),
(b) is a vertical cross-sectional view and a cross-sectional view, respectively, showing an example of the composite member of the present invention. 1... Middle rod (core material), 2... Outer material, 3, 4...
Takehiko Suzue, Patent Attorney, Suzujo Sugane's agent Figure 1 (a) (b) (b) (b). (b)

Claims (1)

[Scope of Claims] (1) A composite member comprising a core material and an outer material that overlaps with the core material on the outside of the core material, and the overlapping portion is overlapped with irregularities. (2) The composite member according to claim 1, wherein the unevenness is a protrusion along the circumferential direction of the outer member. (3) The composite member according to claim 1, wherein the unevenness is a protrusion along the longitudinal direction of the outer member. (4) The composite member according to claim 1, wherein the unevenness is a combination of a protrusion along the circumferential direction of the outer member and a protrusion along the longitudinal direction of the outer member. (5) The unevenness is an inclined protrusion in Claim 1
Composite members described in section. (6) The composite member according to claim 1, wherein the core material is made of a metal with excellent conductivity, and the outer material is made of a metal with excellent corrosion resistance. t7)? Ten spears 'L, m phase 11 Su spear to noeH/
7. The composite member according to claim 6, which is an electrode rod for use in a 4-day trial. (8) A process of applying unevenness to the material by rolling, a process of forming the material into a tubular shape with the uneven surface inside, and inserting a core material into the tubular body obtained in this process and performing a drawing process. A method for manufacturing a composite member, comprising the steps of: