JPS6212738B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a wound core used in an axial gap type flat electric motor.

Generally, this type of wound core has several slots for inserting winding edges radially in the direction in which the steel strips are wound and laminated, and has a fixed indexing angle (winding angle) depending on the number of slots. A certain feed pitch is supported by the steel strip by the winding shaft, but at a certain pitch, when the steel strip is wound and stacked and the diameter increases, the arc length becomes insufficient and the slots do not align well. An inconvenience will occur.

In the method of changing the feed pitch, the present invention predicts in advance the feed length of the steel strip necessary for winding the core that is wound at a certain distance from the punching position, and adjusts the feed pitch of the steel strip. In order to determine the pitch, the winding shaft is moved vertically by the amount of increase in diameter so that the outer circumferential surface of the core, which increases as it is laminated and wound, is always at the same position as the punching height. The servo motor that drives the winding shaft is controlled and driven to increase the feed pitch.

That is, the increase in diameter due to winding is detected, this is converted into an electric signal, and the servo motor is controlled and driven via a computer using this to change the feed pitch, thereby eliminating the above-mentioned disadvantage. To provide a method for manufacturing a wound core, which allows slots to be aligned regardless of errors in plate thickness, can easily deal with cores having different numbers of slots, and can use a small and inexpensive wound core manufacturing machine. The purpose of the present invention will be explained below with reference to the drawings.

In FIG. 1, a steel strip 1 is punched through a slot 4 at a point P by a punch 3 of a power press 2, and wound and laminated around a winding shaft 5 on an O axis separated by a distance l to form a wound core 6. obtain. At this time, the winding shaft 5 is connected to the winding core 6.
Depending on the number of slots required for the punch 3, the punch 3 is wound in the direction of the arrow by a predetermined index angle α by a servo motor 7 driven in synchronization with the punch 3 while it is being raised. When the outer diameter of the wound core 6 increases through sequential winding and stacking, the winding shaft 5 is moved along the guide post 9 by the servo motor 7 by the guide roller 8 that supports the outer diameter.
It also moves vertically by an amount Δr of increase in stacking thickness.
This increase Δr is detected by a detector 10 provided along the guide post 9, converted into an electrical signal, and this signal is used as an input signal to a computer (not shown) to obtain preset information. Based on this, a pulse signal corresponding to the amount of change in Δr is extracted, and the servo motor 7 is controlled and driven based on this to rotate the winding shaft 5 by α+Δα to increase the feed pitch.

To explain in more detail, in FIG. 2A, when the radius at the beginning of winding is _r1 , the slot 4 punched at point P is at the angular position of point _Q1 on the circumference of the winding shaft 5. θ
It is wound up at point ₁ . Furthermore, when the windings are sequentially stacked and the stacking thickness increases by △r and the radius reaches _r2 as shown in Fig. 2B, the slot 4 punched at point P
In order for the material to be wound up at the angular position of point _Q1 on the winding shaft 5, point _Q1 must move by an angle of △θ and be at point _Q'1 . For this purpose, the winding shaft 5 at radius r ₁ must be
As the winding continues, point _Q1 gradually moves in the winding direction, and when the radius of core 6 reaches _r2 , point _Q1 moves to _Q′1.
All you have to do is reach the point. That is, it is sufficient that the winding shaft 5 rotates by an amount of Δθ.

This can be seen from Figure 2 A and B as follows: l=r ₁ θ ₁ = r ₂ θ ₂ (radians) r ₂ = r ₁ +△r θ ₂ = θ ₁ −△θ △θ=Σ△αn It can be understood. Therefore, this relationship is replaced with a pulse signal via a computer, and the servo motor 7 is controlled and driven using this number of pulse signals to determine the winding angle (α+△α) of the winding shaft 5, thereby determining the necessary feed pitch. When the individual punched slots 4 are rolled and stacked,
Thus, it is possible to obtain a wound core 6 having a desired slot 4 that is well aligned vertically.

The present invention relates to a method for producing a wound core in which slots are punched in a steel strip while the cores are wound and laminated on a winding shaft that rotates intermittently. By moving the winding shaft vertically by the amount of increase in diameter so that the height increases, and changing the winding angle of the winding shaft according to the amount of movement,
The feeding pitch of the steel strip is changed so that the punched slots are aligned at the predetermined position.As the diameter increases due to the stacking of windings, the winding method is used to increase the punching pitch between the slots. Increase the winding angle of the winding shaft, and move the center position of the winding shaft vertically only at the part where the diameter increases so that the punching angle between the press and the steel strip is always perpendicular, and measure the distance. The winding angle is determined by
In other words, the feed pitch is changed and the winding angle of the winding shaft is sequentially changed using an automatic machine with a numerically controlled servo system. The effect is that changes occurring in the arc due to fluctuations in winding tension can be absorbed, the slots of the wound core made of laminated wound cores do not become uneven, and that the wound core with various numbers of slots can be easily manufactured. It is something that plays.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of an apparatus showing the method of the present invention, and FIGS. 2A and 2B are explanatory views of the same operation. 1 is steel strip, 2 is power press, 3 is punch, 4
5 is a slot, 5 is a winding shaft, 6 is a winding core, 7 is a servo motor, 8 is a guide roller, 9 is a guide post, and 10 is a detector.

Claims (1)

[Claims] 1. In a method of manufacturing a wound core in which a slot is punched in a steel strip while the steel strip is wound and laminated on a winding shaft that rotates intermittently, the outer circumference of the diameter of the wound core is always at the punching height. The winding shaft is moved vertically by the amount of increase in diameter so that the winding angle of the winding shaft is changed according to the amount of movement, and the feeding pitch of the steel strip is changed. 1. A method for manufacturing a wound core for a flat electric motor, characterized in that the core is aligned at a predetermined position.