JPS62239846A - Manufacture of laminated core - Google Patents

Abstract

PURPOSE:To firmly fit laminates between respective core punched plates and improve air-tightness, by laminating a plurality of the core punched plates having engaging sections consisting of engaging recessed sections and engaging projected sections respectively, pressed-in and fitted on the core punched plates. CONSTITUTION:Stator core punched plates 5 are formed by press-punching the thin flate plates of magnetic steel plates or the like. On the outer diameter section of a slot groove 5a, an engaging section 10 consisting of a strip of an engaging recessed section 5b and an engaging projected section 5c is semi- punched and embossed and formed by press-punch forming. A plurality of said formed stator core punched plates 5 are laminated, and are laminated by applying pressure P to both of the end sections of the stator core punched plates 5 so that the engaging sections 10 of the laminated adjacent stator core punched plates 5 may be pressed-in and engaged with each other in order. As a result, the core punched plates 5 are jointed together, and air-tightness is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a laminated core used in electrical equipment 1, such as an electric motor, and relates to a configuration for #i to improve the sealing between core punches. [Prior art] Conventionally, this type of electric motor has been manufactured by laminating a large number of stator core blanks having a large number of slots and grooves on the circumferential portion of a disk. The stator cores are stacked and fixed by a plurality of seam welds or the like in the stacking direction of the outer periphery of the stator core blanks. Then, predetermined windings are applied to the slot grooves of this fixed stator core to form a stator core.

Permanent magnet materials are fixed to the rotating shaft facing each other with a slight gap in the inner diameter of the stator core, and are rotatably supported via bearings fitted in brackets. The electric motor configured in this way can be used to drive industrial robots, or for industrial use. It is often used to drive castles. In view of these uses, there is a strong demand for smaller size and IT technology.

Therefore, instead of using a frame, which is an external structure of the TE/1 machine, a frame that cools the outer periphery of the stator flkIO with a surface external electric current is used.
It is thought that a seamless structure has good cooling efficiency and is reasonable in terms of external dimensions.

[113 Points to be Solved by the Invention] Conventional stator core punching is constructed as described above.

When an electric TIJJ machine has a frameless structure, the outer peripheral surface of the laminated stator core punches comes into direct contact with the outside air, and liquids such as oil or grinding fluid can enter through the gaps between the laminated cores, causing dielectric breakdown. There was a problem in that it could cause the occurrence of problems, impairing the functionality of the product.

This invention was made in order to solve the above-mentioned problems, and it improves the airtightness between each core punched plate and prevents oil, polishing, etc.
! The object of the present invention is to obtain a method for manufacturing a rolled iron core that can prevent the infiltration of l, etc. to 8i.

[Means for Solving Problem 1] The method for manufacturing a stacked young core according to the present invention is a core punching method that is made of a thin plate material and has a fitting part consisting of one or more fitting recesses and fitting protrusions. A large number of plates are laminated and the adjacent fitting portions of the above-mentioned hollow and U punched plates are successively press-fitted and stacked.

[For production]

In this invention, by sequentially press-fitting the mating parts that match each other, the core punched plates are joined to each other and the electrical layer thickness is improved. A detailed example will be explained with reference to FIGS. 1 to 5.

In Figure 1, (1) is the anti-negative balance side plaquet, (2
) is the load side bracket, and this anti-load side bracket (1
) and the bearing portions (1a) and (2a)iζ of the load-side bracket (2) are fitted with a bearing (3) and rotatably support the rotating shaft (4). (5) is a stator core punched, and as shown in Fig. 2, a large number of slot grooves (5a,) are formed in the inner circumference of this stator core punched (5).
Then, a large number of stator core punches (5) are ff+Jed, and a stator coil (6) is wound within the slot 17 (5a) to form a stator (7). The stator (7) formed as described above has one anti-load side puwoke soto (
1), it is held between both sides by the load side placket (2). (8) is a permanent magnet made of a permanent magnet material such as ferrite or rare class magnet, and has a slight gap with the inner diameter part of the stator (7) and rotates 1111! A rotor (9) is formed by being attached and fixed to the outer peripheral portion of (4).

Next, a single core according to the present invention will be explained in detail with reference to FIGS. 2 to 5. Stator core punching (5) is formed by punching a thin plate material such as a magnetic steel plate.
A fitting portion αQ consisting of a single fitting recess (5b) and a fitting convex portion (5C) is formed on the outer diameter portion of 11 (5a) by half punching by press punching. This fitting part α
O is located near the outer periphery of the stator core punch (5).

The stator core punching (5) formed as described above is then laminated with a large number of 8N layers and adjacent stator core punchings (5).
5) Pressure P is applied to both ends of the stator core punches (5) and V is applied to stack them so that the fitting parts αO of 5) are press-fitted one after another.Therefore, each stator core punch (5) is stacked on the entire circumference. The fitting recess (
5b) and the side surface (50) of the fitting convex portion (5C).
Press fit allowance (C is fitting △ Width 5WC of mating convex part (5C) - @5W of mating concave part (5b)
Since the pressure fitting is carried out by pressing the two screws together, the side surface (51)' of the fitting recess (5b) and the side surface (50') of the fitting convex portion (5C) are in complete contact with each other, and the inner and outer sides of the fitting portion αO are in close contact with each other. It is designed to maintain complete airtightness.

In the above embodiments, the case where the fitting part is a concave-convex fitting between the fitting concave part (5b) and the fitting convex part (5C) was explained, but the fitting part light is shown in FIGS. 7(2) and 8. The fitting portion αJ may be formed by press-fitting the fitting concave portion C11) and the fitting convex portion (6) on only one side, as shown in FIG.

Further, in the above embodiment, the rotor uses a permanent magnet (8), but the rotor may have a squirrel cage structure, or may be a rotary frame machine other than the electric #I machine.

Furthermore, although the case where the fitting portion QG C13 has one thread has been described, it goes without saying that it may have a plurality of threads.

[Effects of the Invention] As described above, according to the present invention, each core punched plate has a fitting portion consisting of a fitting recess and a fitting convex portion, and a large number of iron core blanks are press-fitted and laminated. As a result, the laminated adhesion between each iron and U punched plate is strong, and air flow is improved, preventing oil, grinding fluid, etc. from entering between each iron core, and making it possible to obtain a highly reliable laminated core. effective.

[Brief explanation of drawings]

1 to 5 are for explaining a method of manufacturing a laminated iron core according to one embodiment 171 of the present invention, and FIG.
Figure 2 is a cross-sectional view of the stator core, Figure 4 is a configuration opening showing the state in which a large number of core punches are fitted together, Figure 5 is a half-sectional side view of the machine,
The figure is a cross-sectional view when core punched plates are press-fitted in the stacking direction, FIGS. 6 and 17 show still another embodiment-A1 of the present invention, and FIG. 6 is a cross-sectional view when core blanks of multiple plates are fitted together Fig. 7 is a cross-sectional view when the core punched plates are press-fitted in the stacking direction. In the figure, (5) is the stator iron punched plate, (5'b
)Q is the concave part of the mounting table, (5'3) (1 and 4 are the fitting convex parts, (10α3 is the fitting part. (7) is the stator. In addition, the same reference numerals in each figure indicate the same or equivalent parts. shows.

Claims (1)

[Claims] A large number of iron core punches made of thin plate material and having a fitting part consisting of one or more fitting recesses and fitting protrusions are stacked, and adjacent fitting parts of the core punches are successively press-fitted. A method for manufacturing a laminated iron core, characterized in that the core is formed by laminating layers.