JPS5936137Y2 - Laminated iron core torsion assembly device - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an improvement of a progressive multistage press die.

In order to reduce fluctuations in rotational force, the direction of the rotor slots is twisted with respect to the central axis, which is what is called a skewed laminated iron core. A device for assembling by caulking is disclosed in U.S. Pat. No. 3,200.
2,285.

Also, by changing the height of the punch for each predetermined number of rotor plates,
A method of removing the half-extracting protrusions so as not to fit with the preceding rotor plate and assembling each rotor one by one is also known as described in the above-mentioned U.S. Patent No. 3,202,285. .

However, in the case of a known skew device, for example, Japanese Patent Application Laid-Open No. 48-2
As described in Japanese Patent No. 0003, the angle of twist can be determined by stacking the slopes provided on the half-cut protrusions for caulking so that they are in close contact with each other, or as described in U.S. Pat. No. 3,110,831. Since the vertical movement of the press is mechanically converted into the rotational movement of the torsion die using a cam or worm, it is possible to obtain the planned twist angle.
It is also difficult to change the twist angle, and the mechanism that converts the motion of the press into the rotation of the torsion die requires a considerable amount of space within the die, which is inconvenient because there are many restrictions on the design of the press die. there were.

Also, a rotor with slots twisted in only one direction receives thrust in the axial direction that pushes the stator outward from inside the stator during rotation, so to solve this problem, chevron-shaped or arc-shaped slots are proposed. However, no equipment is known that can freely produce such laminated iron cores.

This invention improves on the above points, and the step motor rotates approximately several tens of steps while the ram is being pulled up, that is, during the period when the punch does not apply pressure to the die, and then decelerates the rotation and twists the die. , the torsion die rotates exactly as planned every time, and by changing the number of steps of the signal, the twist angle can be adjusted at will.

Moreover, by changing the number of steps each time according to a predetermined number sequence rather than being constant, it can also be applied to irregularly shaped skews such as chevrons and circular arcs.

In addition, the installation location of the step motor and intermediate shaft can be freely selected, and when applied to a press die with multiple rows or more, there is also the advantage that all torsional dies can be driven by one chino.

Below, the embodiments of the present invention will be explained with reference to the drawings.
In the figure, 1 is the punch of the twisting assembly station, and 2 is the twisting die, which are in correct opposing positions.

3 is a stamped rotor plate, as described in U.S. Pat. No. 3.20.
No. 2,28 and U.S. Pat. No. 3,110,831
48-20003 or JP-A-48-20003, and as shown in FIG. When pressed against the rotor plate 4 which was previously pushed into the torsion die 2, the half-pull protrusions 3a are inserted into the holes 4b on the back side of the half-pull protrusions 4a of the previous rotor plate 4. Since the rotor plate 3 is fitted into a crimped state, the rotor plate 3 becomes an integral core with four or less rotor plates and is pushed into the torsion die 2.

Here, the inner diameter of the upper part of the die 2 must be smaller than the outer diameter of the rotor plate so as to generate sufficient supporting force due to friction during the crimping process.

The torsion die 2 is rotatably assembled in a lower die 5, and a sprocket gear 10 is attached to the lower part.

The drive device 17 reduces the rotation speed of the step motor 150 by means of the opposite pairs 13 and 14 and transmits the speed to the intermediate shaft 12, and furthermore, the sprocket gear 11. The structure is such that the torsion die is rotated through the chino 16.

If the step motor is made to rotate a predetermined number of steps by conventional means in synchronization with the rise of the press ram or the feed of the workpiece, the punch 1 will twist each time the rotor plate is pushed in. Since the die 2 rotates by a predetermined angle, a predetermined skew is imparted to the slot of the product laminated core.

Figure 2 shows the twisted shape of the slot in the completed iron core. If the direction is reversed, C will change the rotation angle and angle of each step motor according to the predetermined sequence of numbers.
This is an example of changing the direction. For example, by storing an appropriate sequence of numbers in a memory element using a microcomputer, it is possible to create an arbitrary shape such as a circular arc or a sine wave.

The drive device 17 shown in FIG. 1 can be installed at any location inside or outside the die 5, and is connected by a chain, so the present invention can be easily applied to progressive press dies in any combination or arrangement.

FIG. 3 shows an example of a double-row progressive die, and shows that two torsion dies 2 and 2' can be rotationally driven by one drive device 1T.

The drive device of the present invention is also fixed to the press bed shown in FIG. 1 and 6 instead of the lower mold 5, so that only the chino can be removed and left in place when replacing the press mold.

Then, one drive device can be used for various rotors by simply changing settings such as the number of steps, which is economical.

In addition, in the embodiment shown in FIG. 1, the torsion assembly device receives the rotor plate punched at another station, but unlike the known device, the rotor plate is inserted between the punch 1 and the torsion die 2. Of course, it is also possible to punch out.

[Brief explanation of the drawing]

FIG. 1 is an embodiment of the present invention, FIG. 2 is a developed view of a rotor slot, and FIG. 3 is an explanatory diagram of another embodiment. FIG. 4 shows an explanatory diagram of the lamination crimping operation at the twist assembly station. Explanation of symbols, 1... Punch, 2, 2'...
...Torsion die, 3, 4...Rotor plate, 5...
...Lower die, 10...Sprocket gear, 1
1... Same as above, 12... Intermediate shaft, 13,
14...Gear, 15...Step motor, 16...Cheno 17...Drive device.

Claims (1)

[Scope of utility model registration request] This is a torsion assembly device for a rotor laminated iron core for an electric rotating machine built into a progressive multi-stage press mold, in which a step motor drives an intermediate shaft during a period in which a punch does not apply pressure to a die, and twists from the intermediate shaft. A laminated iron core torsion assembly device characterized by being configured to transmit rotation with a mace chain.