JP2664008B2 - Laminated core of electromagnet for accelerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a laminated core of an electromagnet used for an annular accelerator for accelerating or accumulating charged particles.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view a showing the structure of a laminated core of a conventional electromagnet for an accelerator disclosed in, for example, Japanese Utility Model Publication No. 60-27413, and a front view b showing a part of the structure in an enlarged manner. is there. In the figure, 1 is a laminated iron core formed by laminating a large number of substantially T-shaped thin steel plates, 2 is a reinforcing plate attached to the back surface thereof for integrating these steel plates, and 3 is a welded portion.

Next, the operation will be described. The laminated iron core 1 formed by stacking thin steel plates having a substantially T-shape has a uniform cross section so as to have a predetermined shape and size on a jig on which a flat surface has been accurately processed, and has a lamination (axial) direction. While adjusting the number of sheets to be stacked, the stacking length and the surface pressure between the steel plates are fixed so as to have predetermined values. Next, a reinforcing plate 2 for integrating the respective steel plates is applied to the back surface of the laminated iron core 1, and MIG welding or TIG welding is performed to form a welded portion 3 for integration. Here, in an electromagnet that requires a high-precision magnetic field, such as an electromagnet for an accelerator, the magnetic field accuracy is determined by the processing accuracy of the iron core. Need to be suppressed.

[0004]

Since the laminated core of the conventional electromagnet for an accelerator is constructed as described above, when the welded portion 3 is formed, it takes time for the welded portion to melt, and the laminated core 1 There is a problem that a large amount of heat is absorbed and the distortion amount at the time of finishing is increased. That is, when the welded portion 3 is cooled after the welding is completed, a tensile stress is generated there, and the laminated iron core 1 is distorted as shown by a chain line in FIG. In order to compensate for such a defect, various conditions such as a tightening pressure at the time of stacking the laminated core 1, a work place at the time of welding the laminated core 1 and the reinforcing plate 2, and a work order are determined by an operator. Made by skill,
There were problems such as variations in product quality due to differences in worker skills.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to eliminate a welded portion and to obtain a laminated core of an accelerator electromagnet having a small amount of deformation and excellent manufacturability. .

[0006]

According to a first aspect of the present invention, there is provided a laminated iron core, wherein a laminated core is penetrated and fastened with bolts, and two reinforcing plates are tapered. The laminated core is fixed by closely fitting the plates into the same tapered groove provided in the laminated core.

A laminated iron core according to a second aspect of the present invention comprises:
To unify the laminated core, penetrate the laminated core and tighten with bolts, and make the reinforcing plate a tapered plate,
This is inserted into a tapered groove provided in the laminated core, and a liner is press-fitted into a slight gap between the reinforcing plate and the groove to fix the laminated core.

[0008] A laminated iron core according to a third aspect of the present invention comprises:
In order to integrate the laminated core, penetrate the laminated core and tighten it with bolts, pass through pins through the rounded grooves provided in the laminated core, apply a reinforcing plate to the laminated core in parallel with this through pin, and The reinforcing plate is fastened with bolts to fix the laminated core.

A laminated iron core according to a fourth aspect of the present invention comprises:
In order to integrate the laminated core, penetrate the laminated core and tighten it with bolts. At the same time, insert the through-pin into the pin hole provided in the laminated core with a split pin structure, and fix the laminated core. It was done.

A laminated iron core according to a fifth aspect of the present invention comprises:
To unify the laminated core, penetrate the laminated core and tighten it with bolts, provide a loosely tapered wide projection on the laminated core, sandwich this projection from both sides with a reinforcing plate divided into two pieces, The reinforcing plates are fastened with bolts to fix the laminated core.

[0011] A laminated iron core according to a sixth aspect of the present invention comprises:
In order to integrate the laminated core, the laminated core is fastened with bolts while penetrating the laminated core, and a loosely tapered wide projection is provided on the laminated core. The reinforcing plate is shrink-fitted to fix the laminated core.

[0012]

According to the first aspect of the present invention, the laminated core can be fixed only by tightening the through bolts and fitting the groove provided in the laminated core with the reinforcing plate, and welding is not required. In addition, a high-accuracy laminated iron core can be formed, and the work is simplified by increasing the component processing accuracy.

In the second aspect of the present invention, the laminated core can be fixed by tightening through bolts and press-fitting the reinforcing plate and the liner into the groove provided in the laminated core, so that welding is not required, and the groove is not required. Since the gap with the reinforcing plate can be easily adjusted, high-precision processing is not required for the reinforcing plate, deformation by welding does not occur, a high-accuracy laminated iron core can be formed, and work is simplified.

In the third aspect of the present invention, the laminated iron core can be fixed by tightening the through bolts and the bolt between the through pin passing through the laminated iron core and the reinforcing plate applied to the laminated iron core, so that welding is unnecessary, and the reinforcement is eliminated. The plate only needs to be processed with good flatness, does not cause deformation due to welding, and a high-accuracy laminated iron core can be easily formed by adjustment work.

In the fourth aspect of the present invention, the laminated core can be fixed by tightening through bolts and press-fitting a split pin into a pin hole provided in the laminated core, so that welding is not required and a reinforcing plate is not required. Therefore, a highly accurate laminated iron core can be formed without deformation due to welding, and the number of parts can be reduced.

According to the fifth aspect of the present invention, the laminated iron core can be formed by tightening the through bolts, inserting the loosely tapered wide projections provided on the laminated iron core with the reinforcing plate, and tightening the bolts with the bolts. Modification after forming the laminated core is also possible.

According to the sixth aspect of the present invention, the laminated iron core can be fixed by tightening the through bolts and shrink-fitting the reinforcing plate on the loosely tapered wide projection provided on the laminated iron core. Is unnecessary, a highly accurate laminated iron core can be formed without deformation due to welding, the number of parts is reduced, and the operation is simplified.

[0018]

[Embodiment 1] FIG. 1 is a perspective view a showing a first embodiment of the present invention and a front view b enlarging a part of the perspective view. In the figure, reference numeral 4 denotes a stack of thin T-shaped steel plates having a wide tapered groove 4a at the bottom. This is a laminated iron core formed with a jig on which a plane is machined with high precision. The cross sections are aligned so as to have the prescribed shape and dimensions, and the number of piles in the laminating (axial) direction is adjusted. Tightening is performed so that a predetermined surface pressure is obtained in 7a to 7d, and the stacking length is fixed so as to be a predetermined length. Furthermore, by inserting a tapered reinforcing plate 5a into a tapered groove 4a of a laminated iron core 4 having a fixed cross-section and a fixed length in the axial direction, then tapping the tapered key 6 in the axial direction and press-fitting it. Integrate so that the cross section does not shift. Here, the taper key 6
When press-fitting, the tapered reinforcing plate 5a and the tapered key 6 are processed in accordance with the shape of the tapered groove 4a of the laminated core 4 with high precision, or the gap between the laminated core 4 and the reinforcing plate 5a is actually formed. In addition, if the shape is adjusted by polishing the taper key 6 or the like, the alignment accuracy of the steel plate can be easily reduced to about several tens of μm, and the steel plate is not deformed after the adjustment. Note that the taper key 6 has the same effect even when divided in the axial direction.

Embodiment 2 FIG. FIG. 2 is an enlarged front view showing a main part of a second embodiment of the present invention. The difference from the first embodiment is that the tapered groove of the laminated iron core 4 with a tapered groove having a uniform cross section and a fixed length in the axial direction. After the tapered reinforcing plate 5b is fitted into 4a, the liner 8 is beaten from the side surface and press-fitted so that the cross section does not shift so as to be integrated. Here, when press-fitting the liner 8, if a plurality of liners 8 are used and the thickness is changed and adjusted in accordance with the gap between the laminated iron core 4 and the reinforcing plate 5 b, the alignment accuracy of the steel plate is reduced to about several tens μm. It can be easily accommodated and does not deform after adjustment. Further, since the liner 8 can be press-fitted from the side, workability is good. Note that the liner 8 has the same effect even when divided in the axial direction.

Embodiment 3 FIG. FIG. 3 is an enlarged front view of a main part showing a third embodiment of the present invention, in which a substantially T-shaped thin steel plate having a bar-shaped groove 9a is stacked to form a laminated core 9; By inserting a through-hole 10 with a screw hole into the groove 9a, applying a reinforcing plate 11 with a bolt hole with a flat surface accurately to the back surface thereof, and tightening each other with a plurality of through-pin-reinforcement plate tightening bolts 12, the tightening is performed. Since the alignment can be performed without adjusting the cross-section while checking the alignment accuracy by adjusting the pressing force, the tightening pitch, and the like, the alignment accuracy of the steel plates can be easily reduced to about several tens of μm.

Embodiment 4 FIG. FIG. 4 is an enlarged front view of a main part showing a fourth embodiment of the present invention. A laminated iron core 13 formed by stacking substantially T-shaped thin steel plates having pin holes 13a is used. By inserting one side 14a of the split pin into the pin hole 13a, and then press-fitting the other side 14b, the cross section can be integrated without using a reinforcing plate without using a reinforcing plate. Here, when press-fitting the split pin 14b, if the shape is adjusted by polishing the split pin 14b or the like in accordance with the actual gap between the laminated iron core 13 with pin holes and the split pin 14a, the alignment accuracy of the steel plate can be improved. Can easily be reduced to about several tens of μm, and there is no deformation after adjustment. In the above description, the case where the number of the pin holes is one has been described.

Embodiment 5 FIG. FIG. 5 is an enlarged front view of a main part showing a fifth embodiment of the present invention, and shows a laminated iron core 15 formed by stacking substantially T-shaped thin steel plates having a wide tapered projection 15a that is loosely tapered. Using
After sandwiching the laminated iron core 15 with the tapered projections between the two divided reinforcing reinforcing plates 16a and 16b, the reinforcing plates are tightened with the reinforcing plate tightening bolts 17 so that the cross sections can be integrated without deviation. Here, if the desired shape accuracy cannot be obtained, the tightening can be loosened and the steel plate can be realigned again.
m can be easily achieved.

Embodiment 6 FIG. FIG. 6 is an enlarged front view of a main part showing a sixth embodiment of the present invention. The use of a laminated core 15 with a tapered projection is the same as that of the fifth embodiment. Is integrated by shrink-fitting a reinforcing plate 18 in which a tapered groove 18a having the same or slightly smaller dimension as the projection 15a is worked, so that the cross section does not shift.
Here, the tapered grooved reinforcing plate 18 does not need to be adjusted as long as it is processed with good straightness, and the alignment accuracy of the steel plate can be easily reduced to about several tens of μm. Therefore, the number of parts and work can be reduced.

By the way, in the above description, the laminated core is directly tightened with bolts. However, a thick plate called an end plate of about 10 to 20 mm may be provided at both ends of the laminated core, and may be sandwiched and fixed. Although the case where four fastening bolts are shown, the number and fastening positions may be changed. Further, in the above description, the case where the present invention is implemented alone has been described. However, the same effect can be obtained even if implemented in any combination.

[0025]

As described above, according to the first aspect of the present invention,
Since welding work is not required to integrate the laminated core,
A high-precision laminated core can be formed without thermal deformation after welding, and if the processing accuracy of each part is raised, it will be a simple task of tightening bolts and inserting each part once, Products of uniform quality can be obtained regardless of the skill of
There is an effect suitable for mass production.

According to the second aspect of the present invention, since a welding operation is not required to integrate the laminated iron core, a highly accurate laminated iron core can be formed without deformation due to welding, and bolt tightening and liner can be performed. This is a simple adjustment operation of selecting the thickness of each component, and high machining accuracy is not required for each part. Therefore, there is an effect that machining is simplified and an inexpensive product can be obtained.

According to the third aspect of the present invention, since a welding operation is not required to integrate the laminated iron core, a high-accuracy laminated iron core can be formed without deformation due to welding, and between the through pin and the reinforcing plate. Since the tightening force and the tightening pitch can be adjusted, the integration work can be performed while checking the alignment accuracy, and there is an effect that a highly accurate product can be obtained.

According to the fourth aspect of the present invention, since a welding operation is not required to integrate the laminated core, a highly accurate laminated core can be formed without deformation due to welding, and the reinforcing plate itself is not required. The number of parts is reduced, the work is simplified, and an inexpensive product is obtained.

According to the fifth aspect of the present invention, since a welding operation is not required to integrate the laminated cores, a high-accuracy laminated core can be formed without deformation due to welding, and sandwiched between reinforcing plates. Since the bolts can be integrated by tightening the bolts, the reinforcing plate can be detached and attached, the correction after forming the laminated core is easy, the yield of the product can be improved, and an inexpensive product can be obtained.

According to the sixth aspect of the present invention, since a welding operation is not required to integrate the laminated iron core, a high-accuracy laminated iron core can be formed without deformation due to welding, and the reinforcing plate can be burned. So that it can be integrated only by
If only the processing accuracy of the groove of the reinforcing plate is secured, the work can be simplified, the number of parts can be reduced, an inexpensive product of uniform quality can be obtained regardless of the skill of the worker, and the effect suitable for mass production can be obtained. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view a showing a structure of a laminated core of an electromagnet for an accelerator according to a first embodiment of the present invention, and an enlarged front view b of main parts thereof.
It is.

FIG. 2 is an enlarged front view showing the structure of a laminated core of an electromagnet for an accelerator according to Embodiment 2 of the present invention.

FIG. 3 is an enlarged front view showing a structure of a laminated core of an electromagnet for an accelerator according to Embodiment 3 of the present invention.

FIG. 4 is an enlarged front view showing a structure of a laminated core of an electromagnet for an accelerator according to Embodiment 4 of the present invention.

FIG. 5 is an enlarged front view showing a structure of a laminated core of an electromagnet for an accelerator according to Embodiment 5 of the present invention.

FIG. 6 is an enlarged front view showing a structure of a laminated core of an electromagnet for an accelerator according to Embodiment 6 of the present invention.

FIG. 7 is a perspective view a illustrating a structure of a laminated core of a conventional electromagnet for an accelerator, and an enlarged front view b of main parts thereof.

8A and 8B are enlarged front views for explaining a problem of the structure of the laminated core of the conventional electromagnet for an accelerator.

[Explanation of symbols]

 Reference Signs List 4 laminated iron core with tapered groove 5a, 5b tapered reinforcing plate 6 taper key 7a to 7d through bolt 8 liner 9 laminated iron core with daruma groove 10 penetration pin 11 reinforcing plate with screw hole 12 fastening bolt 13 laminated iron core with pin hole 14a, 14b Split pin 15 Laminated core with tapered projection 16 Tightening reinforcing plate 17 Tightening bolt between reinforcing plates 18 Reinforcing plate with tapered groove

Claims (6)

(57) [Claims] 1. A laminated core is tightened by passing through bolts in the laminating direction, a tapered groove is provided on the back surface of the laminated core, and a tapered reinforcing plate divided into two pieces is closely fitted in the tapered groove. A laminated core of an electromagnet for an accelerator, wherein the core is fixed. 2. A laminated core is tightened by passing through bolts in the laminating direction, and a tapered groove is provided on the back surface of the laminated core. A small gap between the reinforcing plate and the groove wall is formed in the tapered groove together with a tapered reinforcing plate. A laminated core of an electromagnet for an accelerator, characterized in that a laminated core is fixed by press-fitting a liner into the core. 3. The laminated iron core is tightened by passing through bolts in the laminating direction, a burrow-shaped groove is provided on the back of the laminated core, a pin with a screw hole is passed through a round hole at the back thereof , and a bolt hole is formed on the back of the iron core. tightening the reinforcing plate and the pin with the reinforcing plate by screwing contact bolt into the screw hole, the laminated core of the accelerator electromagnet, characterized in that to fix the laminated core. 4. The laminated core is fastened by passing through bolts in the laminating direction of the laminated core, a pin hole is provided on the back surface of the laminated core, and a plurality of split pins are pressed into the pin holes to fix the laminated core. Core of electromagnets for accelerators. 5. The laminated iron core is tightened by passing through bolts in the laminating direction, and a tapered protrusion having a tapered shape is provided on the back surface of the laminated iron core. A laminated core of an electromagnet for an accelerator, wherein the laminated core is fastened and fixed. 6. A reinforcement in which a laminated core is tightened by penetrating through bolts in the laminating direction, and a tapered protrusion having a tapered thickness is provided on the back surface of the laminated core, and the protrusion has a tapered groove having the same or slightly smaller width as the protrusion. A laminated core for an electromagnet for an accelerator, wherein the laminated core is fixed by shrink-fitting a plate.