JPS595614A - Die for laminated core - Google Patents

Abstract

PURPOSE:To obtain any desired skew curve by an apparatus wherein a servo motor or pulse motor is mounted on a rotary shaft for driving a V punch or die, and rotation of the rotary shaft is controlled by a controller which can issue any arithmetic command. CONSTITUTION:A reduction gear 1 reduces a rotational speed of a servo motor (or pulse motor) 6 equipped with a pulse generator or tachogenertor, for rotating a rotary V punch 4 supported by a holder 7 via bearings 2 and 3. The punch holder 7 is descended under pressure to press a punched steel plate 9 placed on a die holder by the rotary V punch 4 and a ring-like die 5, thereby to form a projection on the plate 9. By commanding any desired skew curve from the keyboard, a various curve generation arithmetic section can compute the stroke in the form of pulse number/press.

Description

Detailed Description of the Invention The present invention provides a laminated iron core in which a large number of punched steel plates are each provided with caulking protrusions, and these protrusions are stacked and pressed together to connect and solidify the above-mentioned. This invention relates to an arbitrary feed type press for manufacturing a punching m& in which an iron core is skewed in an arbitrary curve by overlapping caulking protrusions.

In the manufacture of iron cores for rotary ridge machines, it has been known for a long time that as a method of laminating and fixing punched steel plates, a plurality of V-shaped protrusions are provided on the steel plates, and these are laminated and pressurized to fit and fix the protrusions to each other. ing.

By the way, the present inventors have determined that, in the mold of a progressive press for producing an iron core, the mold in the process of forming caulking protrusions is made of iron IL? A molding device for a laminated iron core consisting of a punch that rotates concentrically with the center of the hole by an angle equivalent to the skew amount, and a goo with an annular groove that opposes the rotational movement of the punch (January 1973) 19
Japanese application, Utility patent application 1986-6276, Utility patent application 1987-1065
27) is proposed.

This prior art is a progressive type press, and is performed at the beginning of the pOut forming process to change the skew amount, so that the predetermined number of V caulking parts rotates for each laminated punched steel plate. Therefore, the completed laminated core has a straight shape.

Moreover, in the prior art, the skew is formed by mechanical cooperation between a ratchet mechanism driven by the ram stroke of the press and a gear train. There are disadvantages such as the time-consuming setting, limited accuracy due to backlash, and the fact that only a limited skew can be produced due to the ratio of the number of gear teeth.

Here, the present invention does not control the rotating V-punch or die by a mechanical method linked to a ram, but instead uses a servo motor or pulse motor on the rotating shaft that drives the punch or die, and its rotation is controlled arbitrarily. The object of the present invention is to provide a mold device for a laminated iron core which is controlled by a control device capable of issuing calculation commands to obtain a skew of an arbitrary curve (including no skew or a straight line).

FIG. 1 is a side sectional view of one embodiment of the present invention.

■ is a reduction gear consisting of a worm, for example, and a servo motor (or pulse motor) equipped with a pulse generator and a tachometer generator at 60 rotations F! J speed, and rotates the rotating V-punch 4 supported by the holder by bearings 2 and 3.

-r, the punch holder 7 is pressed down by a mechanism (not shown) in the direction of the arrow, and the punched steel plate 9 placed on the die holder 8 is pressed by the rotating V punch 4 and the ring-shaped die 5 to form a protrusion. to form.

FIG. 2 shows a control block diagram of the servo motor (or pulse motor) in this embodiment.

21 is a keyboard for inputting commands such as skew curve selection, 22 is a 6-curve generation calculation unit consisting of a central processing unit ft (CPU), memory, etc., 23 is a press, and 24 is t.
)/A conversion? 25 is a servo amplifier; 26 is a tacho generator that detects the rotation speed and provides negative feedback to the servo amplifier 25; and 27 is a pulse generator that detects the position and provides negative feedback to the digital control section 24.

The part surrounded by a dotted line is a circuit when a pulse motor 6 is used instead of a servo motor, and A is an amplifier.

First, when a pressure-intentional skew curve is commanded from the keyboard 21, each volatile curve generation calculation unit 22 calculates the number of pulses/press stroke.

In addition, a necessary number of pulses are generated in the various curve generation calculating section 22 according to the timing 1 signal from the press 23.

Only the speed and rotation angle correspond to the speed and number of pulses generated by the digital control unit 24 and the servo amplifier 25.
Rotate the servo motor 6 (or pulse motor).

The reduction gear 1 is connected to the output shaft of the servo motor 6.
By rotating the rotary V-punch 4 through the holder and pressing the steel plate 9, the curved skew that was set and commanded when the laminated cores were connected and fixed together can be obtained.

FIGS. 3(a) and 3(b) are 9111 side views of the iron core manufactured according to the present invention.

Figure 3(a) shows an iron core JO with a linear skew 31.
represents the generation performance of each pole curve for each press, n-iNB
22, the number of pulses applied to the servo motor 6 is the same, and the arbitrary curved skew 32 in FIG. are doing. When the number of pulses is zero, there is no skew.

Thus, according to the present invention, from the Wf3 clean mechanism,
A V-crimped laminated core with any skew including curves can be obtained.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of an embodiment of the present invention, Fig. 2 is a control block diagram of a servo motor in the embodiment, and Fig. 3 (
Figures a) and (b) are side views of an iron plate formed according to the invention. 1... Reduction gear, 2, 3... Bearing, 4...
Rotating punch, 5... Ring-shaped die, 6... Savo motor (pulse motor), 7... Punch holder, 8... Die holder, 9... Punched steel plate for lamination, 21...Keyboard, 22...Each building curve generation calculation section, 23...Plastic L/X, 24...Digital control section, 25...Servo amplifier 26...Tachometer generator, 27... Pulse generator, ah... amplifier, 30
...Laminated core, 31...Linear skew, 32...
・Curved skew. Applicant's agent: Inomata

Claims (1)

[Claims] A protrusion for caulking is provided on the punched steel plates to be laminated, and the die in the step of forming the protrusion of a progressive die for manufacturing the core to be laminated under pressure is used with a punch that rotates and moves concentrically with the center of the core with each press stroke. In a molding device for a laminated core, the punch is controlled by a servo motor or a pulse motor having a control device capable of arbitrarily calculating and commanding the rotation of the motor. A mold device for a laminated iron core, which is connected to a motor and rotates an arbitrary amount concentrically with the center of the iron core every press stroke, thereby forming a curved or linear skew in the laminated iron core.