JPS5959047A - Sequentially feeding punching tool for core of motor - Google Patents

Abstract

PURPOSE:To enable to form a core having small lateral thickness difference by rotatably mounting a die for punching the outer periphery of a stator of a lower mold and providing a pilot hole for inserting a pilot pin of an upper mold to the die. CONSTITUTION:A sequentially feeding punching tool for a core of a motor is formed of an upper mold 1 and a lower mold 2 for punching rotor punching plate and a stator punching plate. Punch group corresponding to the die group disposed on the lower mold 2 are correspondingly disposed on the upper mold 1, and positioning pilot holes 19 are formed at a rotary die 14. A pilot pin 20 is provided at the upper mold 1 corresponding to the hole 19, pressed downwardly by a spring 22 under the guidance of a pilot holder 21, and when the pin 20 is raised, a limit switch 24 is operated through a guide rod 23.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a progressive punching tool for electric motor cores.

[Technical background of the invention]

Figure 1 shows the lower die (2) of a conventional progressive punching tool for electric motor cores.
It is attached to a press machine with a feeding device together with the upper mold, and a band-shaped electric iron plate is intermittently fed from the left side to the upper surface of the lower part 1 (2), and the upper mold moves up and down with the vertical movement of the press slide. The punch group of the upper mold and the die group of the lower mold (2) mesh to successively punch and form the electric iron plate. The square in parentheses indicates the station number.

At the first station, each part is punched out using a pilot hole tie (3), a rotor slot die (4), and a shaft hole die (5). At the second station, a stator slot die (6) and an upper die punch (not shown) protrude every predetermined number of pieces corresponding to one electric motor, and punch holes in the rotor binding part die (by force). Punch out.

At the third station, a cutting die (8) for binding the rotor core is used.
At the same time, a punch in an upper die (not shown) protrudes every predetermined number of sheets corresponding to one electric motor and punches a stator binding part overhang die (9). At the fourth station, the rotor core outer diameter die (10a) of the rotary die (lO) is
At the same time, the outer diameter of the rotor is punched out, and each sheet is rotated at a rotation angle β corresponding to the rotor skew angle extension when the press slide is raised as shown in FIG. At the fifth station, the stator inner diameter is punched out using a stator core inner diameter die θ1). At the sixth station, a stator core binding cutting die (12) is used to form a stator binding bent portion. At the seventh station, the core is punched out using a stator core outer peripheral die (13).

At the 4th station, the rotor core is punched out. As shown in Figure 2, the rotor punching board (io) is cut into a cutting part (50a) formed by the binding cutting die (8) at the bottom of the rotating die (b). Due to the frictional force when passing through the restricted die holes, they are sequentially joined as shown in Fig. 3, but the hole (51a) of the binding part negation hole tie (rotor punched plate punched by force) 1) K Since they do not engage with each other, they are separated at that part, resulting in a rotor core having a skew angle α equal to that of a partition machine. At the 7th station, the punched stator core is punched out as shown in Figure 5.
The cut portions (60a) formed in the above are sequentially joined as shown in FIG. 6 by the frictional force when passing through the die holes, but the stator binding portion punched by the binding hole die (9)) Since it does not engage with the hole (61a), it is separated at that part, and a stator core for the machine base is obtained.

[Background technology issues]

However, since a strip-shaped electrical steel plate is punched, the thickness deviation in the feed direction is small in the area equivalent to one punched plate, but the thickness deviation in the direction perpendicular to the feed is non-negligible. In this case, due to the accumulation of sheet thickness deviations in the direction perpendicular to the feed direction, the difference in stacked thickness dimensions becomes large, which impairs the function of the electric motor.

Therefore, it has the disadvantage that it is limited to iron cores with a certain thickness and is not suitable for iron cores with large laminated thickness or iron cores of relatively large size.

[Purpose of the invention]

The present invention was made in view of the above-mentioned drawbacks, and it is possible to produce a core with a small difference in stacked thickness.
The purpose of the present invention is to provide an i-feed punching tool.

[Summary of the invention]

In other words, in the progressive punching process for partition machine cores, a rotary device is used to rotatably attach a die for punching out the outer shape of the stator core in the lower mold, and a pilot hole is provided in the die for inserting the pilot pin in the upper mold. , half the thickness of the iron core for one electric motor is 18
0' The layers are stacked with a shift in the circumferential direction.

[Embodiments of the invention]

An embodiment of the present invention shown in the drawings will be described below. In FIGS. 7 and 8, parts having the same functions and functions as those in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted. The difference is the rotor binding die of the second station (7) and the rotor binding cutting die (73) of the third station.
The number of rotor core slots is about 19 N, which are equally distributed among the stations, and in this example, N=4. The fourth station is a rotary die (IO is rotatable and rotates a rotating mechanism p such as gears (not shown) by a driving pulse motor. The seventh station is a rotary die having a stator core outer peripheral tie U3). As shown in Fig. 9, I has zero gears fixed to the rotary die (I4), gears t+b), (
It has a structure in which it can be rotated by a drive source (18) that is directly connected to the gear u71 via a gear u71. 9. Upper mold (1) as shown in figure 9.
In the lower die (2), punch groups corresponding to the die groups are fixed in corresponding positions, and the rotating die (14) has pilot holes (f!11 hole, pilot hole G!) for positioning. In response to the force, the pilot pin (2) is attached to the lower mold, and the pilot holter (21) is used as a guide and the pilot pin (22)
When the pilot pin (20) is pressed downward at step 1 and rises, the guide rod C! A limit switch (241) is activated via (2).

Next, the action will be explained. An upper die (q+1+) and a lower die (2) are fixed to the press slide and the press bolster of a press machine with a feeding device, respectively, and a strip-shaped electric iron plate is fed from the left to the right. The fed material is punched out in the pilot holes, rotor slots, and shaft holes at the first station, then fed one pitch to the right, punched out in the stator core slots at the second station, and then punched out in the rotor binding section. Drill a hole for one electric motor (with each punch stroke, the punch protrudes and punches out the hole).Next, at the third station, the rotor core binding cut part is formed, and the stator binding part is then cut. The punch protrudes and punches out the hole every punching stroke equivalent to one electric motor.

Next, the outer diameter part of the rotor core is punched out at the fourth station, and a rotating die (1
0) is rotated by a drive source through gears.

Also, for the stacking thickness for one machine, approximately every I/N machine is punched, β
By rotating +360'/N, the punched rotor base plates are sequentially shifted by 17N units, and the slot portions are tied together with a constant skew angle. Then, the rotor binding part is punched out at the second station by a hole, and the amount of the electric motor is cut by a portion K (F) and falls onto a conveyor (not shown) below.

The laminated rotor core has 900 layers in the IE extending direction.
(4th order deviation 4 (t, sl blocks are bundled together, so a rotor core with small thickness deviation is obtained i
do.

Next, the inner diameter portion of the stator core is punched out at the fifth station.

Next, at the sixth station, the bent portions for binding the stator core are formed and fatigued.

Next, the stator and the outer periphery of the core are punched out at the seventh station.

The punched stator blanks are affected by the frictional force when passing through the limited stator core outer peripheral die (13+) of the rotary die (14) and the punching force applied to the top surface of the punched plates through the stator blanks that are successively punched out. 18 at approximately 1/2 of the stacking thickness for one car due to pressure.
Shape t shifted by 0° in the circumferential direction? The stator cores are bound together at the third station, and the stator cores are hammered for 4 hours through the holes in the stator core binding section, so that one electric motor is broken into pieces (E) and falls onto a conveyor (not shown) below.

At this time, the pilot bin (7!n) is the pilot hole (2).
If the upper die (1) is not inserted, the pilot cylinder (0) activates the limit switch (f24) via the inner rod (F24) to stop the lowering of the upper die (1). The rotor core and stator core on the conveyor are taken out of the press machine.

10 and 11 respectively show other implementations 1i=! 1
In FIG. 10, a stator outer circumferential linear portion tie (15) is provided at the boundary between the fifth station and the d↓6 station. FIG. 11 shows a stator outer periphery straight cutting die 126) in the shape of a slint installed at the boundary between the fifth station and the sixth station, and a straight line cutting die 126) at the stator outer periphery at the boundary between the fourth station and the fifth station. A grooved hole die θ is provided at both ends of the cut portion to facilitate cutting.This stator outer periphery linear portion (forms a straight portion of the outer periphery of the stator core in the direction perpendicular to the feeding direction). It is possible to reduce the punching load on the outer periphery of the fixed element core in the station.

〔Effect of the invention〕

As described above, according to the present invention, in a progressive punching tool for a motor iron core, the tie for removing the stator outer periphery of the lower die is rotatably provided by a rotary device, and a pilot is provided for inserting the pilot bin of the upper die. As a result, the rotor core for one electric motor can be shifted 180° in the circumferential direction along with the rotor core and automatically bundled together, resulting in a high-quality core with little lamination deviation. Obtainable. In addition, it has excellent effects such as automating the process from supplying materials to taking them out, improving production efficiency and reducing costs, and making it possible to apply large-sized iron cores, which have traditionally been difficult.

[Brief explanation of drawings]

', Figure 741 is a plan view showing the F type of the conventional jII feed punching tool for 1t11 motive core, Figure 2 is a perspective view showing the rotor core manufactured by the progressive punching tool, and Figure 13g3 is the Figure 2 shows a longitudinal section showing the binding part, Figure 4 d, a plan view showing the skew state in Figure 2, and Figure 5 shows the stator core made with a punching tool. FIG. 6 is a vertical sectional view showing the binding part in FIG. 5, FIG. 71-1 is a plan view without showing the lower mold, Fig. 9 is a cross-sectional view taken along line A-A in Fig. 3, and Figs. FIG. (1)...Upper mold 1ρ, (2)...Lower mold, U (capital).
...Stator core outer circumferential tie, circle...rotating die, (15
1, tllIl, tl'0... tooth Jl' N If,
) i)... Drive source, [9)... Pilot hole, C1
(1)...Pilot bin, +211...Pilot holder, Uno...Spring, 12a)...Guide letter A, -
Force...limit switch, +25)...stator outer circumferential surface i%N tl+tie, (2+;)...stator outer circumference linear section cut tie, (2t)...hole tie. Representative Patent Attorney I-To-O 2nd Figure 4 Figure 5 Figure 6

Claims (2)

[Claims] (1) In a progressive punching tool for electric motor cores, which is composed of an upper die and a lower die for punching progressively-feeding strip-shaped electrical steel plates into rotor blanking and stator blanking at multiple stations, the lower die is fixed. A progressive punching tool for a motor iron core, characterized in that a die for punching the outer periphery of the core is rotatably mounted on a rotary device, and a pilot hole is provided in the die for inserting a pilot pin of the upper die. (2) A die for punching out a linear portion of the stator outline in the direction perpendicular to the feeding direction is provided between the station for punching out the stator outline of the lower die and the station for the preceding process. 11b'i feed punching tool for electric motor core according to item 1.