JPH04331444A - Molding device and manufacture of laminated iron core using same - Google Patents

Abstract

PURPOSE:To perform precise lamination easily by bringing the projection, which is provided on the die side or the stopper side of a mold for dieing a band- shaped metallic material in a specified shape, into contact with the punched hole being punched on the upstream so as to crush burrs. CONSTITUTION:Iron constituent pieces Mn(n=1-n), which are died continuously out of a band-shaped metallic material with an upstream mold (omitted from the figure), are carried to between a stripper 3 and a die 1. A projection in accord with the shape of a dieing mold is provided on either side (on the die 1 side in the figure) of the stripper 3 and the die 1. By bringing the die 1 and the stripper 3 into contact with the punched hole for a constituent piece Mn, the burrs of iron core are crushed. Next, the iron constituent pieces Mn are laminated and pressed to form a laminated iron core. Hereby, the laminated iron core without dispersion can be manufactured easily.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a laminated iron core used in electric machine cores such as electric motors and generators.

0002

[Prior Art] Normally, in the electric machine core of the above-mentioned electric motor or generator, the core component piece is punched out from an electromagnetic steel plate of a predetermined thickness (for example, 0.5 mm thick), and the core component is welded, riveted, or caulked with a protrusion for caulking. , has a structure in which a predetermined number of sheets are laminated and bonded.

By the way, as shown in FIG. 3, the core components used in such a laminated core are sequentially machined in detail by punching out an electromagnetic steel plate using a progressive die (stations S1 to S3). , cutting off the outer periphery at the final station (blanking station S
5) is completed.

[0004] The core component piece formed in this way is
The required number of sheets are laminated, joined together by rivets, welding, or caulking in a mold, and then passed through a winding process and finally placed in a casing to form the final product.

[0005] Among the assembling processes, the winding process is an automatic process in which a thin conductive wire is wound around the slot portion of the iron core using an automatic machine.

[0006] However, there are problems in that the burrs that inevitably occur in press working can cause defects or defects when assembling the insulator, or the wire can be cut, making it impossible to perform the winding work smoothly.

[0007] For this reason, a new deburring process has to be provided, which poses a problem in that the production cost increases significantly.

(Problem to be Solved by the Invention) As described above, in the conventional method of manufacturing a laminated core, burrs are likely to occur when punching core components, making it difficult to perform winding work smoothly, resulting in defects and defects. There is a problem in that this tends to occur, causing a decrease in reliability.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a laminated core with high dimensional accuracy and high reliability.

[Structure of the Invention] (Means for Solving the Problems) Therefore, in the present invention, in a mold apparatus having a plurality of punching stations for processing a strip-shaped metal material into a predetermined shape, one of the stations is At least one of the stations includes a station on the die side or the stripper side that has a protrusion having a shape corresponding to the shape to be processed upstream of the station. Further, in the second aspect of the present invention, a plurality of core components are integrated as a laminated core by punching and molding a metal material by press working to form core components, and by stacking and bonding the core components. In the method for manufacturing a laminated core, the punching step includes a plurality of punching steps using a progressive die,
After punching out the shape of the core component, a station equipped with a protrusion corresponding to the processed shape is brought into contact with the die side or the stripper side to crush burrs caused by the punching.

(Function) According to the above-mentioned mold device, it is possible to obtain a burr-free iron core without preparing a separate burr removal equipment, so there is no need to cut the wire in the slot winding process. Smooth work can be achieved.

In addition, in the conventional method, the laminated layers are laminated in the mold with burrs generated, so the laminated thickness may change due to the burrs, but the present invention prevents variations in the laminated thickness and improves reliability. A high laminated core can be obtained.

[0013] Furthermore, the product obtained as a laminated core having a desired thickness also has stable quality.

(Example) Next, an example of the present invention will be described in detail with reference to the drawings.

[0015] In this method, the core components are formed using a progressive die device and the pieces are laminated to form the stator. 1(a) and Figure 1
As shown in (b), a perspective view and a cross-sectional view of a part of the mold device, a protrusion 2 having a shape corresponding to the processed shape is provided, and this protrusion station crushes the burr B generated during the shape punching process. It is characterized by the following. Figure 1
(c) is an overall view of the mold device.

FIG. 2 shows a stator formed by the method of the present invention.

[0017] This stator has n core constituent pieces M1.
〜Mn, each core component piece M1 〜Mn
is performed in the same way as the conventional punching process shown in Figure 3,
After sequentially punching out the predetermined parts, the burrs generated in the shape punching process are crushed at this protrusion station, and then the outer periphery is further punched out (station S5) to separate and form the core component piece from the connecting part T. It is characterized by:

A method of manufacturing a laminated core according to an embodiment of the present invention will be described below.

First, electromagnetic steel sheets of a predetermined thickness (for example, 0.5 mm thick) are prepared, mounted on a progressive die, and sequentially punched out.

Thereafter, the burrs generated in the shape punching step are crushed at the protrusion station, and the outer periphery is punched out (station S5) to separate and form the core component from the connecting portion T, and at least one part of this opening is formed. Punch out the outer periphery to include the part.

[0021] The core constituent pieces thus formed are laminated and integrated inside the mold using the fitting and caulking of the protrusions 2 to complete a laminated core. Here 3 is a stripper. In this way, it becomes possible to obtain a highly reliable laminated core without burrs with great ease.

[0022] When using a mold device of the type that uses fitting and caulking to integrate the inside of the mold, conventional devices without a protrusion station will leave the mold in a state where burrs are generated. Due to lamination, the thickness of the laminated layers may change due to burrs, but with the apparatus of the present invention, it is possible to form a stator with a predetermined thickness without affecting the laminated thickness.

[0023] In the above embodiment, a type of mold device was described in which formed core constituent pieces are laminated and integrated inside the mold, but punched core constituent pieces may be integrated by rivets, welding, etc. It is also applicable to other types of mold equipment.

[0024]Also, without being limited to the above embodiments,
It is also applicable to the formation of other laminated cores such as rotors.

[Effects of the Invention] As explained above, according to the present invention, in a mold apparatus having a plurality of punching stations for processing a strip-shaped metal material into a predetermined shape, at least one of the stations The system includes a station on the die side or stripper side that is equipped with a protrusion that corresponds to the shape to be processed upstream of the station, so it is possible to remove burrs with extremely simple equipment without having to prepare burr removal equipment. It is possible to obtain a core with no iron core, and it is possible to realize a smooth work without cutting the wire during the slot winding process.

Further, according to the method of the present invention, after punching out the shape of the core component piece, a station equipped with a projection having a shape corresponding to the processed shape is brought into contact with the die side or the stripper side to crush burrs caused by punching. As a result, variations in the laminated thickness can be prevented and a highly reliable laminated core can be easily obtained.

[Brief explanation of the drawing]

[Fig. 1] A diagram showing a mold device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a stator formed using the mold device of the embodiment of the present invention.

[Figure 3] Diagram showing the punching process of a conventional laminated core

[Explanation of symbols]

T connection part, M1 ~ Mn Core component piece 1 Die 2.Protrusion 3. Stripper

Claims (2)

[Claims] 1. A mold device having a plurality of punching stations for processing a strip-shaped metal material into a predetermined shape, wherein at least one of the stations is located upstream of the punching station on the die side or the stripper side. A mold device comprising a station equipped with a protrusion having a shape corresponding to the shape to be processed. [Claim 2] A punching process of punching and molding a metal material by press working to form core components, and stacking and bonding the core components to integrate a plurality of core components into a laminated core. In the method for manufacturing a laminated core including a lamination step, the punching step includes a plurality of punching steps using a progressive die, and after punching the shape of the core component piece, a die side or a stripper side is attached to the die side or the stripper side to correspond to the processed shape. A method for manufacturing a laminated iron core, the method comprising the step of crushing burrs caused by punching by bringing a station equipped with a protrusion with a shape into contact with the station to crush a burr caused by punching.