JPS6237909A - Winding machine - Google Patents

Abstract

PURPOSE:To obtain a small size and light weight winding machine using a cold roll coil material of an Fe-Co-V alloy having a high saturation magnetic flux density and curie point. CONSTITUTION:An iron core laminating thin plate materials of Fe-Co-V series alloy including Co of 46.0-52.0wt% and V of 1.5-2.3wt% is used. The iron core is formed at a rolled iron core which is formed by bending and molding the belt shaped coil material of alloy in its longitudinal direction. Therefore, a small size and light weight iron core in short winding length may be obtained. Thereby, a small size and light weight winding machine is obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is particularly applicable to portable equipment that is required to be small and lightweight;
The present invention relates to a winding device that can be miniaturized and used for welding robots and the like.

In the present invention, the winding device is a general term for transformers, various transformers, inductances, reactors, etc., which are composed of an iron core and a winding wound around its outer periphery.

[Conventional technology]

Silicon steel sheets are currently widely used as core materials for transformers. Through years of research and development, this silicon steel sheet is produced in large quantities as an inexpensive and high-quality material.However, due to the saturation magnetic flux density and the limit of a single Curie, there is a limit to the miniaturization and weight reduction of transformers. There has been a strong desire for a material with even higher saturation magnetic flux density and a single Curie point.

[Problem that the invention seeks to solve]

Silicon steel sheet is an excellent material as a general core material for alternating magnetic flux, and most of it is used in large electrical equipment such as transformers, generators, and electric motors.

In recent years, there has been a strong demand for smaller and lighter transformers, especially for transformers used in portable electrical equipment, welding robots, and the like.

In other words, in the case of welding robots, the welding power transformer is installed as close to the range of motion of the arm tip as possible.
As a result, it is required to shorten the length of the wire with a large cross section, and to prevent a decrease in the mobility of the arm due to the wire running parallel to the joint. However, for this purpose, the transformer needs to be small and lightweight. As a core material for this small and lightweight transformer, the silicon steel sheet has a limit in saturation magnetic flux density and a single point of Curie, and has not been able to fully satisfy the needs for compactness and weight reduction.

The present invention has a high saturation magnetic flux density and a high Curie point.
The purpose of the present invention is to provide a winding device that is smaller and lighter in weight using cold rolled coil material of e-Co-V alloy (hereinafter referred to as cold strip steel).

[Means for solving the problems] The present invention provides 46.0 to 52.0 wt% of Co and V
This is a winding device characterized by having an iron core laminated with thin plate materials of Fe-Go-V alloy containing 1.5 to 2.3 wt%, and the iron core has a strip-shaped coil material of the alloy in its longitudinal direction. It is a wound core type formed by bending in the direction.

The saturation magnetic flux density of the alloy used in the present invention is approximately 24,000
G, which is 20 from about 20,0OOG of grain-oriented silicon steel
% higher than that of silicon steel plate at 960°C.
It is 220 degrees Celsius higher than 220 degrees Celsius, and therefore has a characteristic of high saturation magnetic flux density even at high temperatures, making it possible to miniaturize transformers and the like.

Conventionally, this material has been made through a plate process, i.e. cutting plates, which has low productivity and is very expensive.Also, when the plate thickness is less than 0.5 mm, the dimensional accuracy and shape are insufficient. Despite having the excellent characteristics mentioned above, it has not been studied as a core material for small, lightweight transformers, etc.

In view of this point, the present invention provides Co 46,0 to 52. (l
Fe-Co- containing it%, V 1.5-2.3wt%
By improving the manufacturing process such as heat treatment, we succeeded in manufacturing V-based alloy as a coil material. This resulted in a cold strip steel with excellent dimensional accuracy and shape, which was then used in layers to create compact, This was based on the achievement of achieving the desired purpose by producing a lightweight transformer core.

=3- Further, as described above, the present inventors succeeded in manufacturing the Fe-Co-V alloy as a strip material, and measured various properties of the strip material. As a result, it was confirmed that the bending workability in the longitudinal direction was considerably improved compared to that in the width direction and that of the cut plate material, and was sufficient to be formed into a wound core.

In the present invention, 46.0 to 52.0 wt% of Go was added to
This is because the magnetic properties deteriorate even if the content is less than 46.0wt1 or more than 52.0wt%.

In addition, ■1.5 to 2 or 3 wt% was chosen because if it is less than 1.5 Iit%, cold workability will be poor and it will be difficult to produce cold strip steel, and if it exceeds 2 or 3 Iit%. This is because the magnetic properties deteriorate.

Furthermore, when Cr exceeds about 0.5 wt%, it slightly degrades coercive force 1 (c) but improves workability;
Cr and Mn do not reduce the magnetic moment like many other elements, but rather increase it and improve workability. Therefore, it is possible to add Cr or Mn in an amount of about 1.5% or less in combination or in combination. Therefore, the present invention complies with this.

[Effect]

The winding device of the present invention uses Fe-Co-■ which has a high magnetic flux density.
Since the alloy is used, it is possible to reduce the cross-sectional area of the core, thereby making the core smaller and lighter, and furthermore, this miniaturization also shortens the winding length, making it possible to reduce the overall size and weight.

Furthermore, since this alloy contains a large amount of expensive Co, even though it has become possible to manufacture it with a coil material as described above, it is still expensive. Therefore, it is important to increase the utilization rate of the material by using a wound core type or combining strip pieces.

In the former case, the coil material has improved bending formability in its longitudinal direction, although it is poor, so it can be bent.

〔Example〕

Next, the present invention will be described in detail below based on examples.

An alloy with a composition of 49.3% Co, 1.97% V, and the balance Fe was vacuum induction melted and hot rolled after blooming to form a 2.0 m
A coil with a thickness of 250 nm and a width of 250 nm was manufactured. After solution treatment, this coil was subjected to cold rolling, descaling, trimming, etc., and then rolled to a thickness of 0.35 mm, with a product width of 4.
A slit was made at 0 m. Using this strip, a wound core type transformer core shown in Fig. 1 was manufactured. The weight of the iron core is 1°95kg
Met. For comparison, silicon steel plates with the same thickness and width were used, the inner diameters were the same, the outer diameters were changed, and the thickness was 2. l3kg, 2.51kg, 3.02kg 1~
I made a lance iron core. After magnetically annealing the above iron core, it was wound and its characteristics were measured. Figure 2 shows the results.

From this figure, the transformer core (1,95 kg) of the present invention is 2
．． It can be seen that it exhibits almost the same characteristics as a 51 kg silicon steel lance core.

〔Effect of the invention〕

As mentioned above, the winding device according to the present invention has a core weight approximately 30% lower than that of a conventional transformer using a grain-oriented silicon steel plate.
It can be seen that the weight can be reduced.

The reduction in the cross-sectional area of the core also reduces the length of the windings, and therefore the weight. As can be seen, the winding device of the present invention is extremely useful for reducing the size and weight of transformers for portable electrical equipment, welding robots, and the like.

Although the present invention has been described above with a focus on transformers, its effects are effective not only on transformers, but also on various transformers, inductances, chokes, reactors, and the like.

[Brief explanation of drawings]

FIG. 1 is a front view and a side view of a transformer core of the present invention. Figure 2 is a comparison example of the characteristics of the transformer core of the present invention and a transformer core using a silicon steel plate. A in the figure is the transformer core of the present invention (core weight 1.95 kg), and a - Q
is a silicon steel plate transformer core, and the core weight is 3
．． 02kg, 2.51kg, and 2.13kg.

Claims (1)

[Claims] 1 Co46.0-52.0wt% and V1.5-2
．． A winding device characterized by having an iron core made of laminated thin plates of Fe-Co-V alloy containing 3 wt%. 2. Claim 1, characterized in that the iron core is a wound core type formed by bending and forming a strip-shaped material in its longitudinal direction.
Winding equipment described in section. 3 The material of the iron core contains 46.0 to 52.0 wt% of Co and 1.5 to 2.3 wt% of V, and if necessary,
3. The wire-wound device according to claim 1 or 2, characterized in that the total amount of one or both of Cr and Mn is 1.5 wt% or less, and the remainder consists of Fe and unavoidable impurities.