阅读说明：本技术 铜或铜合金板条和往复线圈及其制造方法 (Copper or copper alloy strip and reciprocating coil and method of making same ) 是由 泉千寻 于 2018-03-14 设计创作，主要内容包括：本发明提供一种不易产生由与张力垫的摩擦所导致的金属粉的铜或铜合金板条的往复线圈(トラバースコイル)及其制造方法。本发明为一种铜或铜合金板条,其在表面涂布有动粘度为3～12mm<Sup>2</Sup>/s的油,且上述油的量为100～500mg/m<Sup>2</Sup>。(The invention provides a reciprocating coil (トラバースコイル) of copper or copper alloy strip, which is not easy to generate metal powder caused by friction with a tension pad, and a manufacturing method thereof. The invention relates to a copper or copper alloy strip, the surface of which is coated with a dynamic viscosity of 3-12 mm 2 Oil per second, and the amount of the oil is 100 to 500mg/m 2 。)

1. A copper or copper alloy strip is coated with a kinematic viscosity of 3-12 mm on the surface²Oil per second, and the amount of the oil is 100 to 500mg/m²。

2. The copper or copper alloy strip of claim 1, wherein said copper or copper alloy strip has a metal plating on a surface thereof.

3. The copper or copper alloy strip according to claim 2, wherein said metal plating is reflow tin plating.

4. The copper or copper alloy strip according to any one of claims 1 to 3, wherein said oil is a petroleum hydrocarbon or a synthetic ester.

5. A reciprocating coil of copper or copper alloy strip, characterized by: coating the surface of the copper or copper alloy strip with a dynamic viscosity of 3-12 mm²Oil per second, and the amount of the oil is 100 to 500mg/m²。

6. The reciprocating coil of claim 5 wherein the surface of said copper or copper alloy strip has a metal plating thereon.

7. The reciprocating coil of claim 6 wherein said metal plating is reflow tin plating.

8. The reciprocating coil according to any one of claims 5 to 7, wherein the oil is a petroleum-based hydrocarbon or a synthetic ester.

9. A method for manufacturing a reciprocating coil having a dynamic viscosity of 3 to 12mm²The amount of oil/s is 100-500 mg/m²After coating the surface of the copper or copper alloy strip, the copper or copper alloy strip is wound into a reciprocating coil.

10. The method of making a reciprocating coil of claim 9 wherein the surface of said copper or copper alloy strip has a metal plating thereon.

11. The method of manufacturing a reciprocating coil of claim 10 wherein said metal plating is reflow tin plating.

12. The method of manufacturing a reciprocating coil according to any one of claims 9 to 11, wherein the oil is a petroleum-based hydrocarbon or a synthetic ester.

Technical Field

The present invention relates to a copper or copper alloy strip and a reciprocating coil (トラバースコイル) and a method for manufacturing the same, and more particularly, to a copper or copper alloy strip having a plated surface, a reciprocating coil obtained by winding the copper or copper alloy strip, and a method for manufacturing the same.

Background

In the present invention, copper and copper alloy strips used for electric/electronic parts such as terminals and connectors are already wound into coil shapes. Among the coils, there are discoid coils and rewinding coils. The discoid coil is a coil wound by overlapping strips with their edge surfaces (cross sections) maintained on the same plane, and has the same width as the strips. On the other hand, the reciprocating winding coil is a coil wound on a cylindrical bobbin having a relatively long width by spirally shifting the strip in the width direction, and the reciprocating winding coil has a relatively long width.

The pancake coil is such that the edges of the strip are aligned on the same plane, so that the strip does not shift in the width direction once wound into a coil. On the other hand, since the reciprocating winding coil is formed by winding the strips while being shifted in a spiral shape, the overlapped strips are likely to be shifted in the width direction, and are wound in a state where the edges of the strips are in contact with the plate surface of the strips. Therefore, compared with the discoid coil, the reciprocating winding coil tends to have the following tendency: when micro-vibration is applied for a long time, scratches (scratches) are likely to be generated due to the rubbing of the strips against each other. Examples of the sources of the micro-vibration include vibration during coil conveyance using a rail or the like, and mechanical vibration when the coil is wound up and fed to a press.

In order to prevent such scratches, patent document 1 discloses the following method: the surface of the copper or copper alloy strip on which the rust-preventive coating film of benzotriazole or a derivative thereof has been formed is further coated with an oil, and a coil is wound by inserting a spacer paper. The spacer paper prevents the coil layers from sliding, and therefore prevents the coil surfaces from rubbing against each other due to misalignment during manufacturing, transportation, and the like, thereby preventing scratches from occurring.

Disclosure of Invention

Problems to be solved by the invention

However, when a copper or copper alloy strip wound into a reciprocating coil is rewound and press-worked into a shape for use in electric/electronic components such as terminals and connectors, the method described in patent document 1 has the following problems.

That is, when the copper or copper alloy strip wound into the reciprocating coil is rewound and press-processed into a shape for a terminal or a connector, the rewound strip is pressed by a mechanism called a tension pad, and is guided to the inside of the press while being given a constant tension. Here, the felt surface of the tension pad is in contact with the upper surface and the lower surface of the bar with a specific pressing force, and the surface of the bar is rubbed by the felt due to the movement of the bar. The purpose of using the tension pad is to: imparting tension to the strip and wiping off dirt adhering to the surface of the strip.

If dirt accumulates on the tension pad to form a mass, the mass becomes an unreleasable shape by pressing, the mass of this shape falls off the pad and adheres to the strip, and the strip with the dirt mass adhered thereto is guided to the inside of the press. When the bar having the dirt adhered thereon is pressed, the pressed product may be damaged, the pressing mold may be deformed, or the pressing mold may be damaged.

Previously, it was considered that the dirt accumulated on the tension pad was metal powder when scratches were generated in the reciprocating coil. Therefore, as in patent document 1, it is attempted to reduce the amount of dirt deposited on the tension pad by preventing scratches by inserting a spacer paper between the coils.

However, as a result of trial and error, the present inventors have found that even if scratches are prevented and the appearance is good, metal powder may adhere to the tension pad. The metal powder is a metal powder in which both the plating metal powder generated by slight abrasion and the plating metal powder generated by abrasion due to friction with the pad adhere to the tension pad. In particular, since the surface of the bar subjected to the reflow tin plating is covered with tin having low hardness, plating metal powder is likely to be generated, and a problem in the pressing step is likely to occur.

In the invention described in patent document 1, although a certain effect can be improved with respect to scratch prevention, since the metal powder adhering to the tension pad is not sufficiently reduced as described above, there is room for improvement with respect to the prevention of the trouble in the pressing step.

Accordingly, the present invention has been made to solve the above-mentioned problems, and more particularly, to a reciprocating coil of a copper or copper alloy strip in which metal powder is less likely to be generated by friction with a tension pad, and a method for manufacturing the same.

Means for solving the problems

The present invention includes the following aspects.

(1) A copper or copper alloy strip is coated with a kinematic viscosity of 3-12 mm on the surface²An oil in an amount of 100 to 500mg/m²。

(2) The copper or copper alloy strip according to (1), wherein a surface of the copper or copper alloy strip has a metal plating.

(3) The copper or copper alloy strip according to (2), wherein the metal plating is reflow tin plating.

(4) The copper or copper alloy strip according to any one of (1) to (3), wherein the oil is a petroleum hydrocarbon or a synthetic ester.

(5) A reciprocating coil of copper or copper alloy strip, characterized by: coating the surface of the copper or copper alloy strip with a dynamic viscosity of 3-12 mm²Oil per second, and the amount of the oil is 100 to 500mg/m²。

(6) The reciprocating coil of (5), wherein the surface of the copper or copper alloy strip has a metal plating.

(7) The reciprocating coil of (6), wherein the metal plating is reflow tin plating.

(8) The reciprocating coil according to any one of (5) to (7), wherein the oil is a petroleum hydrocarbon or a synthetic ester.

(9) A method for manufacturing a reciprocating coil having a dynamic viscosity of 3 to 12mm²The amount of oil/s is 100-500 mg/m²After coating the surface of the copper or copper alloy strip, the copper or copper alloy strip is wound into a reciprocating coil.

(10) The method for producing a reciprocating coil according to (9), wherein the surface of the copper or copper alloy strip is plated with a metal.

(11) The method for manufacturing a reciprocating coil according to (10), wherein the metal plating is reflow tin plating.

(12) The method for producing a reciprocating coil according to any one of (9) to (11), wherein the oil is a petroleum hydrocarbon or a synthetic ester.

Effects of the invention

According to the present invention, generation of metal powder caused by friction with the tension pad can be effectively suppressed, so that the trouble of the pressing step can be reduced.

Detailed Description

(copper or copper alloy lath)

In the present invention, the kind of the copper or copper alloy strip is not particularly limited. Among them, the present invention is preferably applied to a copper or copper alloy strip having a metal plating on the surface thereof, from the viewpoint of effectively reducing generation of metal powder or plating metal powder due to abrasion with the tension pad. In particular, the surface of the bar subjected to reflow tin plating is covered with tin having low hardness, and plating metal powder is easily generated, so that the present invention can be preferably used.

(oil)

In the present invention, the oil applied is a general lubricating oil that prevents metal friction or abrasion. For example, petroleum-based hydrocarbons or synthetic esters can be used. The coating amount of the oil is set to 100 to 500mg/m². If the concentration is less than 100mg/m²When considering the period from the manufacture of the strip to the press working for several months, the effect cannot be maintained, and if it exceeds 500mg/m²There is no difference in the effect, resulting in waste, and excessive oil seeps from the end face of the coil to contaminate the relevant equipment, etc., which are operational problems. From the above viewpoint, the amount of the oil to be applied is more preferably 200 to 450mg/m²More preferably 300 to 400mg/m²。

The dynamic viscosity of the oil is set to 3-12 mm²And s. Less than 3mm²Oil having a low kinetic viscosity/s is easily volatilized, and it is difficult to maintain the effect of the oil during the period from the time when the oil is applied to the copper or copper alloy strip to the time when the oil is press-worked. If it exceeds 12mm²In some cases, it is difficult to apply the coating and the subsequent operation becomes difficult. From the above viewpoint, the kinematic viscosity of the oil is more preferably 4 to 10mm²(ii) s, more preferably 4 to 8mm²/s。

As a method of applying the above-described oil of dynamic viscosity to the copper or copper alloy strip until the amount becomes the above-described amount, a method such as electrostatic coating, dropping, spraying, etc. is conceivable, and each method can be selected according to specific needs. In any of the methods, it is preferable that the oil is uniformly applied to the surface of the copper or copper alloy strip, and therefore it is preferable that the kinematic viscosity and the amount of the oil are adjusted within the above-mentioned range of the kinematic viscosity and the amount, and the oil is uniformly applied to the surface of the copper or copper alloy strip.

When the copper or copper alloy strip is coated with the oil and then wound into the reciprocating coil, the metal powder or the plated metal powder generated by abrasion with the tension pad can be effectively reduced, and as a result, the phenomenon that the dirt accumulated in the tension pad adheres to the copper or copper alloy strip is reduced, and the defects in the subsequent pressing step are also reduced.