JPS60170443A - Manufacture of core - Google Patents

Abstract

PURPOSE:To improve the yield of the material of a motor by composing the projection of a rotor core by forming grooves on the inner periphery of a stator core. CONSTITUTION:A stator side core 6 is punched off from a soft steel plate. The core 6 is composed integrally with a yoke 7 and a field pole section 8. Grooves 9a, 9b are formed on the inner periphery of the section 8 at the press punching time. Further, the ends of projections 4a, 4b of a blank 1 of a rotor core are simultaneously composed by punching by pressing. The punched part 10 is composed in the width smaller than the radial lengths of the projections 4a, 4b, and composed as an air gap of a motor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a motor core, particularly in a motor in which a stator and rotor core are simultaneously formed from the same steel plate by a press working method.

[Prior art]

Conventionally, this kind of thing has been disclosed in Japanese Patent Application Laid-Open No. 54-86504,
JP-A-52-1OA6TI, JP-A-55-796
60, JP-A-54-125408, and JP-A-87-6858. The explanatory diagrams described above are shown in FIGS. 1(a) and 1(b) and will be summarized below.

In FIG. 1, (1) is a rotor (or stator) core blank, which is formed by punching mild steel plate members and stacking them in a direction perpendicular to the plane of the paper to form a laminated core. (2) is a slot blank on which an armature (rotor or stator) coil (3) is wound as shown. (4a) and (4b) are protrusions, initially formed as shown in Fig. 1 (&), and after x, the first
As shown in Figure (kl), it is bent in the direction of the arrow to form a half-open slot (5). The closed slot (5) is filled with an electrically insulating resin (not shown), and the armature coil (3) is firmly fixed thereon to produce a rotor (or stator). By describing the electrical characteristics of the device,
In particular, experiments have shown that the rotational force can be increased by 5% ff(I
It has been ordered.

The conventional device is as follows, and the protrusion (4aX4b)
Since it is punched out from a steel plate, there are drawbacks such as poor material yield of the equipment.

[Summary of the invention]

This invention was made in order to improve the above-mentioned conventional drawbacks, and by configuring the protruding portion of the rotor core to have a concave groove on the stator core side, the material yield of the device can be improved. It was planned.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 2, (6) is a stator side core that is machined by press punching from a single mild steel plate (electromagnetic steel plate), and includes a yoke [ff5 (7) and a field magnet. The pole parts (8) are constructed in one direction and are used in a stacked manner.

(9a) and (9b) are concave grooves formed on the inner circumferential surface of the field pole part (8) during the press punching process, and are formed in one rotor core blank ( The ends of the projections (4aX4b) of 1) are constructed at the same time.

The gap is a cut-out part, which has a width Δl smaller than the radial length of the protrusion (4aX4b), and is configured as a gap in the motor. According to the above, the rotor core blank (1) has the same configuration as shown in Fig. 1 (&), and this blank (1) has been additionally machined as explained in the 1st section (&), and the rotor side is 00RE(■
Used as a key side core).

In this way, the stator and rotor cores are punched from the same sheet (steel plate material), and the protrusions (4aX4b)
can be constructed without deteriorating the material yield rate.

Incidentally, although the assembly of the stator and rotor obtained by the present invention was not explained in detail in the above, each may be used separately as a component of a motor (for example, the stator may be used as an alternating current machine motor). , the rotor is used as a direct fMt?lA motor member), similar effects can be obtained.

Further, the structure of the semi-closed slot formed by bending the protrusion may be replaced by a fully closed slot.

〔Effect of the invention〕

As described above, according to the present invention, in a method in which the stator and rotor of a motor are punched from the same sheet (laminated type yoke method), the rotor side thrower)! The stator side corresponding to the protrusions '(4m) (4b) which are the ffi horn holding parts is constructed by providing grooves (9a) (911) in the field pole part (8). This has the effect of greatly improving yield.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are cross-sectional views for explaining the manufacturing process of a conventional device, and FIG. 2 is an explanatory view of the manufacturing process of a motor according to an embodiment of the present invention. In the figure, (1) is a blank, (2) is a slot blank,
(4 &) (Fb) is the protrusion, (6) is the stator side core,
(7) is a yoke hole, (8) is a fixed dowel, (9aX9b) is a groove, and ■ is a dropout gap. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1 Figure 2

Claims (2)

[Claims] (1) The stator core and rotor core of the motor are composed of laminated steel plates, and the laminated steel plates are punched by press working, and protrusions are formed in the slots of the rotor core in the radial direction of the outer cylinder. In the case where the protrusion is bent to close the slot to form a semi-closed or fully closed slot, the protrusion of the rotor core is provided with a concave groove in the inner part of the stator core. A method for manufacturing an iron core, characterized in that the stator core and the rotor core are simultaneously extracted and processed from the same steel plate. (2) The protrusion has an end aligned with a concave groove provided on the stator core side, and forms a drop-out gap between the stator core inner circumferential surface and the rotor core outer cylindrical surface. A method of manufacturing an iron core according to claim 1, characterized in that: