JPS62104458A - Manufacture of motor frame - Google Patents

Abstract

PURPOSE:To enhance the circular degree of a frame and improve radiating property, pressing a cylindrical main frame unit formed with a plate member being formed round, from outside, and by pressure-shaping the frame unit from the inner diameter side at a specified dimension after radiation fins are welded on the outer peripheral surface. CONSTITUTION:First, a specified plate member 1 is made round and formed in a roughly cylindrical shape, and the butted end surfaces are welded to form a cylindrical main frame unit 2. Then, on the outer diameter side of the main frame unit 2, metallic molds 23 with the inner diameter section formed on the cylindrical surface of desired dimension are arranged and are pressed from the outer diameter side, and the main frame unit 2 is cylindrically shaped. After that, on the outer peripheral surface of the main frame unit 2, radiation fins 11 are welded. Finally, inside the main frame unit 2, extension clicks 3 are inserted and pressed from inside to enhance the roundness degree of the main unit 2. As a result, contacting property between the frame unit 2 and a core 6 is improved, thereby heat radiating characteristic is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to an electrical appliance equipped with heat dissipation fins. The present invention relates to a method of manufacturing a frame for an IWtI machine.

[Conventional technology]

Generally, when electromagnetic equipment is operated, its temperature rises due to internal power loss. For this reason, in the electric motor, heat radiation fins are attached to the outer peripheral surface of the base frame body to increase the contact area with the air, thereby dissipating the heat generated inside to the outside and preventing humidity.

Conventionally, this type of electricity! The electric motor frame used in the III machine was manufactured through the processing shown in FIG. To roughly explain kneading based on the figure, first, a flat plate (1) of the required dimensions shown in figure (a) is kneaded using a curved compacting machine (not shown) equipped with two rolls and eight rolls. It is formed into a substantially cylindrical shape as shown in the figure (to). next.

As shown in FIG. 4(C), the contact surface of the #M portion of this substantially cylindrical body is longitudinally welded to form a frame 4: body (2) of shape II.

Here, in the same figure (not shown in (1), there are multiple expansion claws (3
) to perform sizing by plastic working, and
The inner circumferential surface of the arm body (2) is expanded in the radial direction so that its inner diameter is close to the diameter of a perfect circle, and the nutator core (to be described later) is press-fitted to a maximum diameter of 314ζr. And the same figure (e)
As shown in the figure, there is a cross section 11 on the outer peripheral surface of the frame book r+ (21).
A letter-shaped heat dissipation fin (1υ connected to the protrusion).

In this way, the frame body (
2) is manufactured.

Nao, the internal VC of this frame body (2) is the slot (5) into which the coil (not shown) is inserted, as shown in the same figure (f).
) is press-fitted to form a stake.

The stator core (6
) The heat generated from the stator core (6), the contact area (7) of the frame body (2), the welded area (8) between the frame body (2), the heat frame body (2), and the radiation fin 01)
It is transmitted to the release fin Qυ through the air and is emitted to the outside.

Incidentally, in order to increase the amount of heat generated from the stator core (6) dissipated to the outside, it is necessary to increase the contact area of the contact portion (7) and the diagnostic area of the welded portion (8).

[The point at which the invention is about to pass]

However, if the welding area of the bathtub (8) is increased, the welding heat input will increase, and the inner diameter of the frame body (2) will become approximately an elliptical diameter due to the thermal strain generated by welding. In addition, the frame body (2) itself also expands in the circumferential direction near the welded portion (8).

For this reason, the conventional 111! The V section is built using the I-Hiro method, and the 7 frames for the electric eJI are used. The conductivity from the core (6) to the heat dissipation fin oll is 9c(r,(ru).

As a result, there was a problem in that the crystallinity of the electric coil (1:*) was reduced to 1:*.

This invention was made in order to solve the problem 1; , the difficulty of curved molding 4c An electric wire v'Jwj that can form well the vicinity of the end part 11i of the approximately cylindrical forming formation.
The purpose of the present invention is to provide a method for manufacturing a frame for use in vehicles.

[Failure to solve the gap] A method of manufacturing a frame for a voltage value section according to the present invention is as follows.

(1) A step of forming a material having the required dimensions into a shape of approximately the same 17σ.

(2) A step of welding the end contact surfaces of the substantially cylindrical forming body to form a cylindrical frame body.

(3) Compressing the substantially cylindrical formed body in its radial direction with a mold having a desired internal dimension.

(4) Welding heat dissipation fins to the outer surface of the frame body.

(5) A step of applying pressure in the radial direction so that the inner circumferential surface of the Yoki frame body matches the target inner diameter dimension.

It was manufactured in the following process order.

[Function] A feature of the present invention is that after welding the radiation fin to a frame body which is previously formed into a cylindrical shape, pressure is applied in the radial direction to the inner circumferential surface of the frame body. Since I applied
The inner peripheral surface of the frame body becomes smooth. For the door, a flat plate material is formed into a substantially cylindrical shape, the end abutting surfaces of this substantially cylindrical body are welded to form a cylindrical frame body, and a mold having a required inner diameter is used to radially mold the material. It is compressed and the area near the end contact surface of the frame body is also molded.

[Examples of the invention]

1) and 1(b) are a cross-sectional view and a side view showing an apparatus used in the method for manufacturing an electric motor frame according to the present invention,
Figures 2 (■) and (b) are a cross-sectional view showing a heat dissipation fin used in the manufacturing method of an electric motor frame, and 9411
Top views, Figures 8) to (2) are perspective views for explaining the manufacturing method of the electric motor frame, and Figures 5 and 6 are perspective views.
The same members as in the figures are denoted by the same reference numerals, and detailed explanations will be omitted. In the same figure, ^-c is a heat dissipation fin that has a bent part (lla) as a protrusion for welding.It is formed by bending a rectangular metal plate (2) into a U-shaped cross section. . 04 Work 04) is the upper electrode and lower electrode of the resistance welding machine.
). O, bent part +11a)
The outer surface of μ is in contact with the outer circumferential surface of the frame body (2), and in this state, a predetermined pressure 8 is applied by progeexy carbon welding.
Electricity is applied.

In addition, the external curvature of the bent portion (lla) of the radiation fin (II) is desirably a plate thickness of about 2 to 4su+ and a curvature of about 5 to IOR. Ranel.

Next, a method of manufacturing a motor frame according to the present invention will be described using FIGS. 8(a) to 8(b).

First, a curve forming machine (not shown) equipped with eight loafers for straddling two flat plates (1) of the required dimensions shown in Figure (a) is used.
It is formed into a substantially cylindrical shape as shown in the same figure (1)).

As shown in the same figure (C), both ends are longitudinally welded to form a frame body (2). After that, as shown in the same figure 1), from the upper mold 2]) and the lower mold 2] whose outer diameter is approximately equal to the outer diameter of the target 71-nome main body (2) and the inner 1b is The area 1 gnome main part (2) is compressed in the radial direction of the mold (c). By using this process, the vicinity of the end abutment surface 0υ of a difficult approximately cylindrical body formed by r, s')/4 curves can be formed satisfactorily.

At this time, since the end abutment surface 05) is butt-welded, the raised part a of the bath welding bead is the upper base! (In order to prevent the inner surface of D, it is necessary to provide a relief break in the upper mold η.Next, we will bend the rectangular metal plate 0'l. Thus, a heat dissipation fin 0υ with a U-shaped cross section is formed.
) are arranged so that the bent portions (1la) are attached to the four circumferential surfaces of the frame body (2L!), and as shown in FIG.

Here, as shown in (f) of the same figure, multiple expansion claws (3)
W) Sizing due to processing.

The inner circumferential surface of the frame body (2) is expanded in the radial direction so that its inner diameter is slightly close to a perfect circle, and the stator core (6)
When press-fitting, make the frame body a maximum of 41 (C@. In this case, it depends on the sizing process) 1 straight of the radial elongation rate of the frame body (2), which is caused by the projection welding. (2) By making the elongation in the circumferential direction sufficiently large to the average elongation rate in the radial direction, A:I [
It is possible to form a frame body (2) having a diameter near IA of VC and a diameter that increases the area where the outer circumferential surface of the stator core (6) and the inner circumferential surface of the frame body (2) overlap. I'm interested in this Zaijindano JVi engineering.

Frame body (2) that occurs when projecting and disassembling
thermal distortion can be reliably corrected.

Figure 4 shows young fruit produced by Honkai Akihohiro. This drawing shows 8 frames with an inner diameter of 16 mm.

If these are samples A, B, and C, this sample A
, B, C, the maximum inner diameter of the frame (2) II-
f! The difference between J9 and the minimum value is calculated, and J9 is expressed on the vertical axis.

As is clear from this figure, for example, if we compare R in the sample A frame.

2.2 KM after vertical joint m1 drawing, 4.11 n:11 after projection welding, 0.4 fine after sizing processing, and sizing processing is performed after projection welding. It is clear that thermal distortion can be corrected by this method.

That is, to manufacture a frame for electric H.

By bending a rectangular metal plate 0, the cross section U is created by VC.
A cylindrical shape is formed in advance, and the bent part (lla) is arranged so as to be attached to the outer peripheral surface of the frame body (2), and the heat dissipation fins 0η and the frame body (2) are
After welding the projector cape and the frame body (2)
What is necessary is to perform a sizing process that applies pressure in the radial direction to the inner circumferential surface of. The inside of this frame body (2) is shown in the same figure (
2) A slot into which a coil (not shown) is inserted as shown in
The stator core (6) with the slot (5) is press-fitted to form the stator.

In the electric vehicle frame manufactured in this way, the area where the inner circumferential surface of the frame body (2) and the outer circumferential surface of the stator core (6) come into close contact, and the molten metal part between the frame body (2) and the heat dissipating fins (IllLl) This is because the area of (8) is large.

It is possible to reduce the contact thermal resistance and improve the function of preventing the temperature rise of the coil.

In addition, in Embodiment A of the present invention, an example was shown in which the heat dissipation fins were welded to the frame body (2) after the processing step shown in Fig. 8fd), but the If the heat fin (11) is difficult to weld in the heat fin (11) when the heat fin (2) is formed and the heat fin (11) is difficult to weld, the heat fin (11) is The same 1゛Q between the process and the JJl shown in the same figure (e)
(Even if one sizing process is performed separately from the sizing process shown in f'l, l:^, in this case, the same figure (>t) fc
The width of the ql plate material (]) shown in the bending direction is reduced by the amount of elongation due to the sizing process.

In addition, in the one-valve quadrupling embodiment, when welding the radiation fins 01) to the outer circumferential surface of the frame body (2), the two radiation fins Qη are connected to each other. The stiff heat dissipation fins Qυ are arranged in opposing positions, that is, at positions separated by approximately 180° from the axis in the circumferential direction of the frame body (2), and are welded continuously or simultaneously. By doing this, the frame body (
2) Thermal strain can be dispersed and avoided.

Furthermore, on the outer circumferential surface of the frame body (2), a mounting base W for installing the electric motor at the location of use, a hanging ear for hanging the electric motor, or a one-way Terminal seats, etc. are sometimes welded to the periphery of the hole made in the plate material (1), but this type of welding has an extremely small effect of thermal distortion on the frame body (2) compared to heat radiation fin bath welding. , the vertical joint welding process and the processing process 11 of press-fitting the stator core (6) into the frame body (2) shown in FIG.
[Effects of the Invention] As explained above, if the present invention is applied, the radiation fins can be welded to the frame body which is formed into a cylindrical shape in advance.
After c, pressure was applied to the inner peripheral surface of the frame body in the radial direction, and the W+ of the frame body and stator core was
+# + With a sufficient capacity of 1, the /8 layer color area of the heat radiation fins and the frame body can be increased, and a frame for a 7' Ifc electric motor with radiation 441 characteristics can be obtained immediately. As a result, coil burnout, deterioration of the motor rotating shaft bearing, etc. caused by crystallinity of the motor coil during NC motor operation can be completely prevented.

Further, after forming a frame body by welding the end contact surfaces of the flat plate material into a substantially cylindrical shape, the frame body is compressed in the radial direction using a mold having a desired inner diameter dimension. Therefore, it also has the advantage that the vicinity of the end abutting surface of a spirally shaped substantially cylindrical formed body of curved molding can be molded with high precision.

[Brief explanation of drawings]

FIGS. 1(a) and (11) are a sectional view and a side view showing a device used in the a-adjustment method for an electric pus frame according to the present invention, and FIGS. 2(8) and (bl are the same < Tm: A cross-sectional view and a side view showing a release fin manufactured by a motor frame manufacturing method, and Figures 3) to (2) are perspective views for explaining the manufacturing method of an electric motor frame according to the present invention. figure,
Figures 4, ) to (f') are perspective views for explaining the conventional method of manufacturing an electric motor frame, Figure 5 is a cross-sectional view of the electric motor frame, and Figure 6 is a comparison showing the effects of the present invention. There is a diagram. In the figure, (2) is the frame body and the 0υ radiating fin. (llal is a bent part, and 饅 is a metal plate.

Claims (1)

[Claims] A method of manufacturing a frame for an electric motor, characterized in that the frame is manufactured in the following order of steps. (1) Step of forming a flat plate material of required dimensions into a substantially cylindrical shape. (2) A step of welding the end contact surfaces of the substantially cylindrical forming body to form a cylindrical frame body. (3) Compressing the substantially cylindrical formed body in the radial direction using a mold having a desired inner diameter. (4) Welding heat dissipation fins to the outer surface of the frame body. (5) A step of applying pressure in the radial direction so that the inner circumferential surface of the frame body has the desired inner diameter dimension.