JPS58163247A - Cutting-die for punching plate of motor core - Google Patents

Abstract

PURPOSE:To punch outer diameter of a rotor accurately, by a method wherein a punching plate is pushed by an adaptor fitted to a rotor slot hole and a stripping ring projecting corresponding to a rotor slot surrounding portion. CONSTITUTION:A slot tamping portion 14 (a) of an adaptor 14 is fitted in a rotor slot punched in preceeding step, and at the same time a rotor slot surrounding portion of raw material is strongly pressed by convex face of a strip- per ring 20. If an upper mold is moved downwards in this state, an outer diameter punch 11 (a) of upper mold rotor is penetrated in the raw material and the rotor slot surrounding portion is pressed and held by the stripper ring 20. These portions of raw material are constrained and subjected to the compression stress thereby shearing is performed. As a result, a rotor slot web of quite small width can be punched out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cutting die K for punching a motor core in a progressive manner.

[Technical blueprint of invention]

Figure 1 shows the punching layout of the material when punching the motor core in the progressive format.In the first step ▲, the lotus slots, holes 1 and shaft holes 2 are punched out. In the next second step 1, the rotor and rotor 3 are punched out, and in the third step C, the outer diameter 4 of the rotor is punched out, and the center portion punched out with an O-cut is taken out as a rotor punch [5]. Then, in the next fourth step D, the stator outer periphery d is punched out, and the punched part is KIKed out of the mold as a stator punched plate 1. Figure IIIZ is a plan view showing the upper mold part of a conventional electric motor core insert.Lotus slot, hole punch 1 and shaft hole punch 9 are respectively installed in the first step ▲.
1, a group of upper metal fittings for punching out the shaft hole 1), status El, t/4 te 10, mouth-p outer diameter x hole 11, stator outer periphery d hole 12 are the second machining 8lB, respectively. This constitutes a group of footwear fittings corresponding to the punched parts K of the 3rd work @C and the 4th work IID.

In addition, the lower mold part equipped with a female plate (not shown) corresponding to the shoe hardware group κ of these shoes, the upper mold part and the lower mold part are guided by the guide post 13K so that they can be freely attached and separated from each other, and the diamond, On the other hand, a band-shaped hoop material is used as the material for punching the motor core, and the punching operation is performed by attaching the punch and moving the workpiece up and down. Then, in synchronization with the punching operation K of ζ, the material is moved from the carp feeder tK at a pitch equivalent to one process. With such an automatic press, the rotor punched plate and the stator punched plate are punched out, and K is taken out from the mold.

[Problems with background technology]

However, with conventional cutting dies, it is difficult to punch out extremely narrow web sections.For example, as shown in FIG. It is desirable to make the size 8) extremely small from the viewpoint of motor performance, but with the conventional cutting die structure, the rounded sheared image shape due to large plastic deformation of the material is likely to collapse, and the anti-chip WAK or weso may be broken. Therefore, there was a problem that the gap between the above eight parts could not be made very small.

[Purpose of the invention]

Ct. Atr. ] The present invention has been made in view of the above circumstances, and is an extremely narrow wafer with one button, 5HI, and 1l rotor. We provide a cutting die for punching motor cores that enables the punching area of parts 0-9, 12 pg > 9-h@. The purpose is to #t-nh.

Skin Ha Kaikan:! T! fz2 Trippari [Embodiment of the invention], Ku...Z
...1 good/bad Lll te 97 dishes. An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. PSlk<J3t'. -Lee. The details will be explained with reference to the following. Incidentally, the same parts as in FIGS. 1 and 2 are given the same reference numerals, and the explanation thereof will be omitted. FIG. 3 is a plan view of the upper die for punching the electric horizontal core, and FIG. 1114 (a) is a plan view and a cross-sectional view of the stator inner periphery in the third step C. That is, the upper die structure of the third process liC is different from the conventional cutting die structure K shown in FIGS. 1 and 2K. For example, as shown in FIG. 4, the upper mold structure of the third work 11C has the outer diameter of the upper mold rotor, and the central part of the punch 11a, the κ adapter 14, is fitted into the holed bolt 11K. The adapter 14 is provided with a slot central portion 14a on its front side into which the slot and hole K punched in the previous process are inserted during the punching operation, and this slot and protrusion 14*.
FlC is made of highly wear-resistant material and is treated with high hardness [K], and its external dimensions are particularly high for the adapter 140 external strength and upper MIW.
The relationship between the outer diameter of the arm and the outer dimensions of the 11 m long arm has been completed with high precision. Furthermore, a car pin 16 is provided in the center of the front surface of the adapter l4, and a spring (not shown) is loaded on the side opposite to the cutting edge so that the spring pin 16 is elastically protruded at all times. Also top m
Upper mold holder 11 that holds the rotor outer diameter 4nd 11a
A sweeper 11 is interposed between the adapter 14 and the rear surface of the adapter 14 to prevent excessive stress from being generated in the slot and groove protrusions 14mK of the adapter 14 when the adapter 14 is fastened to the upper holder 11. A stripper ring jO is provided on the outer periphery of the upper rotor with an outer diameter of 1 inch IIm. The strip of ζ, the pearl cylinder 20 is attached to the front surface K of the main body H, and the front surface of the inner peripheral edge near the inner diameter of the loam-like stator corresponds to the outer circumference κ of the lotus loft by 0.2 μm.
The angle, slit, and armpit body surface are also made to protrude, and are precision machined and hardened using a wear-resistant material. In addition, 21 is a single outer diameter die for the underwear.

With such a configuration, for example, a band-shaped Hoog material is used as the punching material, and the electric motor core punching die as shown in Fig. can be punched out. That is, in the first process ▲, the lotus wight part 1 and the shaft hole part 2, in the second process 1, the status gy} part 1, and in the ga process C, the stem inner peripheral part 4, 1
In the 14th process 11D, the stator outer circumferential part e is punched out, and the stator punching plate 5 is punched out in the 3rd process 11C, and the stator punching plate r is punched in the 4th process D. Ichito and others are forced to quit their jobs.

IIs figure, No. 411! ! 1 is a diagram showing the situation of the third step CO punching work, and shows the lotus slots punched in the previous machine in the upper tank descending 1iK.
! When II14m is inserted, K strip, /f ring 2
Apply strong pressure to the outer periphery of the lotus piece of the material with the convex surface of 0.

At the same time, the carbine L# is prevented from descending by the bulkhead K and is pushed back into the upper mold against the spring force K. When the K upper mold is further lowered in this state, the K upper mold rotor outer mold/mother punch IIm bites into the material K, but the slots and protrusion 14m of the hair daugter 14 of the rotor slot 1 and the protrusion 14m are inserted into the rotor outer mold/mother punch IIm, as shown in Fig. 6. The outer peripheries of the rotor slots and toes are held under pressure by the strut and arm rings 20, and these material parts are subjected to compressive stress while being subjected to shearing action while being restrained except for the lower surface of the inner diameter of the stator. will be carried out. As a result, it becomes possible to punch out extremely narrow lotus slots and tow parts.

Note that the present invention is not limited to the above-mentioned embodiment K. For example, in the above-mentioned embodiment, the case of single-row punching of the motor core was described, but in order to improve the material yield, multi-row punching such as K2-row punching may be used. It goes without saying that K can also be applied in such cases as a punching and punching die is often used.

Further, in the above embodiment, the punched four-piece blanks i are laminated, and after die-casting aluminum for forming the secondary conductor part of the motor, for example, the outer diameter of the rotor core is turned by the amount of the gap for the data core κ. is required. Therefore, in order to omit such a turning operation, punching may be performed using a punching layout F as shown in FIG. 7. In this case, the 1st and 2nd process workers and B perform O machining as in Fig. 1, and in 113 process E, punching with a dimension of *Kmm outside after rotor turning is performed, and in the 4th process 11F, the stator inner diameter is equivalent to K. In this type of press work, the rotor slot web s1 is punched in the 31st @EOfJ punching machine.
Although the width dimension is smaller than that when punching is performed using the layout shown in FIG. 1, it is possible to perform the width dimension by using a punch as shown in Example K above.

〔Effect of the invention〕

As described above, according to the cutting die for electric motor core according to the present invention, p
It is possible to punch out extremely narrow web portions that form the outer periphery of the completely closed slot of the punched board, and the punching durability is significantly improved. Therefore, the efficiency of the motor is improved and noise is reduced. Furthermore, according to the present invention, since high-precision K punching can be performed, it is possible to perform punching with the dimensions of the finished rotor outer diameter as an electric motor in the 1K punching machine for the outer diameter of the rotor after lotus spot punching. Additionally, the rotor outer diameter turning process in the rotor manufacturing process can be omitted.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an example of a conventional punching layout of a material for punching motor cores in a progressive manner, Fig. 2 is a plan view of the upper mold of a conventional motor core punching die, and Fig. 3 is a diagram of the present invention. FIG. 4 is a plan view of the upper die of a motor core punching die according to one embodiment K (1
) 佽) is a plan view and a sectional view of the 4-inch part of the upper die in the process of punching the rotor outer periphery of the above example, and FIGS. 5 and 6 are the start and end of punching in rotor outer periphery punching process 1. FIG. 7 is a sectional view showing the shape of the mold at the time, and FIG. 7 is a diagram showing an example of the punching layout of the material of the present invention. 5... Rotor punching, 1... Stator punching, 1...
Lotus Throat Y} i4 te, 10...Status Thro, To/Archive/Ch, IIm... Sea fi Outer diameter A inch, 12...
・Stator outer circumference/f inch, 14... adder, 14
a...Stone center, 16...ki, carpin, 11
...Space, 11...Upper mold holder, 19...
Stripper body, 20...Striper 4-ring,
21-p Itoyo outer diameter die. -202- -203-

Claims (1)

[Claims] Upper mold rotor outer diameter 4 in the process of punching out the rotor outer mold by progressively feeding the material of the motor core with a fully closed lotus loft and punching it with a punch of a predetermined shape. The center part K of the outer diameter of the outer diameter of the upper rotor of ζ
An adder that fits and has a slot and a protrusion that fit into the rotor slot hole K punched in the pre-processing step 1 in the material! The rotor is fitted with the outer periphery K of the above-mentioned upper rotor outer diameter I cutter, and the annular portion corresponding to the outer scrap portion K of the rotor slot is made to protrude by a predetermined amount from the front surface of the stripper. A cutting die for cutting out electric motor cores.