JPS58116046A - Manufacture of armature core - Google Patents

Abstract

PURPOSE:To facilitate the engaging and fixing of a frame to a toothed part by continuously punching and laminating projecting tooth each of which has a guide groove to be loosely engaged with a lever formed at the frame, superposing the teeth having fixing groove to be engaged with the level on the projecting tooth, continuously punching and laminating them. CONSTITUTION:An armature core is divided into a frame 3 of slot and a toothed part 4. The toothed part 4 is formed by first continuously punching and laminating in prescribed number n2 guide grooves 6a projecting teeth 6 having notched grooves 7 for bonding Hall elements for detecting the position, then continuously punching and laminating in prescribed number n1 teeth 5 having fixing grooves 5a to the teeth 6. In this manner, a lever 3a formed at the frame 3 is engaged with the groove 6a of the teeth 4, the frame 3 is further press-fitted to the groove 5a side of the teeth 5, thereby assembling a core.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to manufacturing an armature core in which the core is divided into a slot frame and a tooth portion, and the substantial thickness of the tooth portion is larger than that of the frame. I'll tell you how.

In electric motors such as transistor motors that use permanent magnets as field means, in order to effectively utilize the magnetic flux of the permanent magnets and increase operating efficiency, for example, the axial dimension of the armature core is made smaller than the permanent magnet part of the rotor. If it is short, and to compensate for this shortness, a separate protruding tooth that protrudes in the axial direction is attached to one or both sides of the tooth of the armature core and fixed.From this point, the magnetic flux convergence part is integrated. Formation is being done.

However, when actually adopting this type of structure, there is a major manufacturing problem in that manufacturing the protruding teeth that make up the magnetic flux convergence part and attaching them to the iron core require a large amount of man-hours for fixing. was.

In view of these circumstances, the present invention divides the iron core into a slot frame and a tooth portion, and forms paulownia wood on the frame side of this divided surface and a fixing groove into which the slot fits and secures on the tooth side. To provide a manufacturing method for an armature core in which fitting and fixing of the two is easy and the manufacturing process is simplified even though the substantial stacking thickness of the tooth part is larger than the stacking thickness of the frame body. The purpose is to

The present invention will be explained below based on an embodiment shown in the drawings. The armature core in this embodiment is used in a now transistor motor, in which the rotational position of the permanent magnet rotor is detected by a Hall element, and the windings of each phase are sequentially energized in accordance with the second detection signal. be.

FIG. 1 is a plan view showing an assembled state of an armature core manufactured by the present invention, and FIG. 2 is a front view thereof.

Further, FIGS. 3 and 4 are diagrams showing a fitted state and a divided state between the frame body and the teeth of the slot, respectively, and FIG.
This figure is a diagram showing the process of cutting and laminating the teeth, and FIG. 6 is a diagram clearly showing the process of laminating the teeth by punching and punching.

Furthermore, FIG. 7 is a diagram showing the press-fitting process in an easy-to-understand manner.

In the diagram, l is formed by dividing the armature core into three parts.

The tooth portion 4 is formed by overlapping the tooth 5 and the protruding Ivlr6, and the protruding tooth 6 protrudes toward one side of the frame 3, and the tooth 5 has a larger stacking thickness than the frame 3. This protruding portion and the protrusion 116 form a magnetic flux convergence portion.

A cutout groove 7 is formed on the inner peripheral side of the protruding tooth 6 (on the side facing the rotor) for mounting a Hall element for detecting four positions.

The frame body 3 side of the dividing plane between the frame body 3 and the tooth portion 4
On the part 4 side, tIIi54 is a dovetail-shaped fixing #5ab where the handle 3a is fitted and fixed [i1 On the part 4 side, the handle 3a is loosely fitted into the protrusion rIi6, for example 0.03 m to 0.05 m
A dovetail-shaped guide groove 6a having a slack of 111 degrees is formed.

Also, 8 is the armature winding S, 13 is each fli! r
This is a connecting protrusion for stacking a predetermined number of 5 or 1vI6 protrusions.

Next, a blanking and laminating process for forming the tooth portion 4 using a progressive press die will be described with reference to FIGS. 5 and 6.

In addition, the number of laminated sheets in the whole part 4 is n, teeth 5 and protrusion w6
The number of laminated sheets is nl and C2, respectively, and the strip-shaped steel plates 20 are sequentially transferred at a predetermined feeding pitch in the direction indicated by the arrow P.

(5-1 shows the processing process of the first punched board 9,
Each of the steps a1 to dl operates as follows.

(al) I punching hole 10 for lamination bonding by punching I punching board 9
Form by punching.

(bi) Guide groove 6a and notch groove 7 for I punching board 9
Form by punching.

(C1)+Transfer to the next process without performing any processing.

(dx) + Punch out the strip steel plate 20>singing plate 9 using the punching die 11! Press it into 1112.

(5-2) shows the process of punching a predetermined number of sheets 9 required for laminating the protruding teeth 6, that is, n'z-1 sheets, from the second sheet onwards. a2~d2
operates as follows.

(C2) I Transfer to the next process without performing any processing.

(b2) A guide groove 6a and a notch $7 are formed by punching the I punching board 9.

(C2) Protrusion 1 for stacking and joining 1 punched board 9
3 is extruded and molded.

(dz) + A punched plate 9 is punched out from the strip steel plate zO using the punching die 11 and press-inserted into the lower 1Ji 12.

(5-3) This shows a processing process for punching a predetermined number of sheets 9, that is, n1 sheets necessary for laminating and forming Gi teeth 5,
Each step a3 to d3 operates as follows.

(aS) + No processing is performed (transferred to the next process.

(bs)+Transfer to the next process without performing any processing.

(C3) Projection 13 for lamination bonding to I punched board 9
extrusion molding.

(ds) + A punched plate 9 is punched out from the strip steel plate 20 using the punched plate 11 and press-inserted into the lower die 12. [At this time, the fixed part s5a is punched and formed at the same time.

As explained above, first the first punched board 9 is punched out through a series of steps (5-1), and then n2-1 punched boards 9 are punched out through a series of steps (5-2). Then, through the series of steps (5-3), punch out the Δ leg punching board 9.. Yu8..01, mold, 2 inside.

As shown in the sixth column, the punched sheets 9 are combined in a stacked state and are sequentially transferred and discharged below the lower mold 12 as the work progresses.

At this time, for joining the respective punched plates 9, the projections 13 of the second plate are fitted into the punched holes 10 of the first plate, and the protrusions 13 of the second plate are fitted into the punched holes 10 of the first plate
The third protrusion 13 is fitted to the opposite side of the protrusion 13. After that, the n blanks 9 are fitted to each other at the protrusion 13. The joining is done.

In addition, since a punching hole 11 is formed in the first punched board 9 that is punched out after the nth punched board 9 due to repeated operations, the protrusion of the nth punched board 9 Since it does not fit into the opposite side of extrusion 13, the part 4 can be formed by reliably stacking and bonding the punched plates 9 to every n blocks.

Next, to the part 4 formed in this way, a frame 3 formed in a separate process (details of the manufacturing process II will be omitted, but in the same way as in the manufacturing process of the base part 4, the punched hole 109 protrusion 1
3 is formed, then punched out using an upper die and sequentially laminated and bonded into the lower die.) will be described.

First, the housing 3a is fitted into the guide groove a of the protrusion 16. The guide groove 6a is 0.035 m to 0.05 m larger than the groove 3a.
Since it is formed as large as m5 and the fit is loose, it can be easily mated.

In this fitted state, the frame body 3 is further inserted into the fixing groove 5a of the tooth 5.
The assembly of the split core 1 is completed by press-fitting it to the side and fitting the housing 3a and the fitting #5a so that the end face of the frame 3 and the end face of the teeth 5 are in the same position.

According to the above method, the housing 3a can be quickly and reliably fitted and fixed.

In other words, since the housing 3a is accurately positioned by the guide groove 6a, there is no occurrence of a stuck part near the press-in port of the fixing groove 5a, which occurs during conventional press-fitting, and the magnetism of the contact part after press-fitting is fixed. The resistance can be significantly reduced.

Further, since the press-fitting positioning of the housing 3a can be easily performed, workability is good, the mechanical equipment is simplified, and the number of press-fitting assembly steps can be reduced.

Furthermore, even though the stacking thickness of the tooth portion 4 is larger than the stacking thickness of the frame body 3, the actual press-fitting stroke is small, so that the pushing load is approximately equal to the stacking thickness of the frame body 3.

In addition, since the protrusion I16 and the teeth can be integrally laminated in a series of blanking processes, the manufacturing process is simplified, and this can have an extremely large effect on reducing the number of assembly steps in large violet production.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the assembled state of the armature core manufactured using the present invention, Fig. 2 is its front view, and Figs. 3 and 4 show the fitting of the slot frame and the teeth, respectively. Fixed condition 1aj
FIG. 5 is a diagram showing a and a divided state. FIG. 6 shows the process of cutting out and laminating parts of the plates, and FIG. 7 clearly shows the process of press-fitting the frame and the parts. l...Split core, 3...Frame body,
3a...Input 4...Tooth part, 5...
・115a...Fixed thread 6...Protruding teeth,
6a...Guide groove. Patent applicant Shibaura Seisakusho Co., Ltd. No. 3 (!l Figure 4 No. 6 (!i

Claims (1)

[Claims] The iron core is divided into a slot frame and a tooth part, and the armature core is housed on the side of the slot frame on this divided surface, and a fixing groove into which the housing fits is formed on the side of the tooth part, A step of stacking the protruding teeth having guide grooves into which the housing loosely fits is continuously cut out by an amount corresponding to the protrusion into one side of the frame body, and stacking the protruding teeth having the fixing grooves on the protruding teeth so that at least the above-mentioned A process of continuously cutting and laminating plates corresponding to the stacking thickness of the frame body forms a toothed portion, and a process of loosely fitting the paulownia of the frame body into the guide groove, and from this fitted state, the handle is removed. A method of manufacturing an armature core, characterized in that the part and the frame are coupled by a step of press-fitting into the fixing groove side and fitting and fixing the two.