JP2956436B2 - How to assemble the assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling an assembly in which a plurality of divided members are brought into contact with contact surfaces formed on the respective divided members.

[0002]

2. Description of the Related Art Conventionally, as an assembly for positioning and assembling a plurality of divided members by abutting a contact surface formed on each divided member, for example, a divided electromagnet shown in FIGS. 4 and 5 is known. is there. This split type electromagnet is a quadrupole electromagnet used for convergence and divergence of charged particles in an accelerator facility or the like.

A quadrupole electromagnet manufactured at a processing / assembly factory requires an operation of passing a vacuum duct 5 made of stainless steel, aluminum, or the like, which serves as a passage for charged particles, at the center of the accelerator facility. At this time, the through bolts 8 fixing each return yoke 1 are removed, and the whole is divided into at least upper and lower parts, and after the vacuum duct 5 is installed, reassembly is performed again. At this time, the knocking pin 6 or the fitting structure 7 is used as a positioning mechanism to maintain the accuracy of reassembly.

[0004]

Conventionally, in a split type electromagnet, a knock pin 6 or a fitting structure 7 is used as shown in FIGS. 4 and 5 for the purpose of maintaining the accuracy of reassembly. . When the knock pin 6 is used, pure iron is often used as the material of the pole piece 2 and the return yoke 1 on which the knock pin 6 is struck. Therefore, if the knock pin 6 is made of the same material, baking is performed when the knock pin 6 is driven. There is a risk that it will be unable to be pulled out next.

On the other hand, if the material of the knock pin 6 is made of stainless steel or the like and is harder than the pole piece 2 and the return yoke 1, the pin hole may be deformed. Further, structurally, positional accuracy is not higher than the fitting tolerance of the pins during processing.

Further, in the case of the fitting structure 7, since the fitting portion must be processed for each divided member, the processing cost is extremely high in order to precisely process each fitting portion. Become.

[0007]

According to the present invention, there is provided a method of assembling an assembly, comprising: assembling a plurality of divided members by abutting a contact surface formed on each of the divided members; It is necessary to use a positioning piece that fits and abuts at least between two adjacent divided members on the surface that comes out of the surface of the assembly member, and penetrates the positioning piece through the divided member when assembling the divided member. Without split parts table
The divided members are positioned and abutted against the surface, and the pieces are pressed so that there is substantially no gap between the adjacent two divided members and the piece.

Further, the positioning piece has a rectangular shape, and a cutout portion into which the rectangular positioning piece fits is formed at the end of the divided member over the mutual contact portion.

[0009]

In the above construction, when reassembling the divided member,
By pressing and positioning the adjacent divided members in two orthogonal directions (X and Y directions) with the piece so that there is substantially no gap between the two adjacent divided members and the positioning piece, the desired position is achieved. The processing and assembly accuracy has been reproduced.

[0010] Since the surfaces of the divided members into which the positioning pieces are fitted are all present in the assembled state, the processing of this surface can be performed simultaneously with other processing in the assembled state. For this reason, the processing accuracy of the fitting portion is remarkably improved as compared with the case of using each member, and the processing operation is also facilitated.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an example to which the method of the present invention is applied, a quadrupole electromagnet used for the purpose of converging and diverging charged particles will be described as an example of a remarkable electromagnet in which division and reassembly work is indispensable in an accelerator or the like.

FIG. 1 is an overall configuration diagram of a quadrupole electromagnet as one application example of the method of the present invention. The electromagnet main body is composed of a return yoke 1, a pole piece 2, and a coil 3. In order to mount the coil 3 and the vacuum duct 5, the electromagnet main body has a four-part structure in this example. 4 above. In this example, the return yoke 1 and the pole piece 2 are integrated.

Since the vacuum duct 5 usually has flanges (not shown) at both ends, it is impossible to install the vacuum duct 5 in a state where the quadrupole electromagnet is assembled. A large number of the quadrupole electromagnets are provided in the direction of the vacuum duct 5.

The features of the method of the present invention include a positioning piece 11 for maintaining reassembly accuracy when the vacuum duct 5 is installed, and a notch 12 into which the positioning piece is fitted.
And to use.

When the coil 3 and the vacuum duct 5 are installed on a return yoke 1 in which a pole piece 2 machined with high precision is integrated, the return yoke 1 which is a four-divided member is provided with the desired mechanical accuracy. (Usually within 0.1 mm is required).

At the time of manufacture, while the abutting surfaces 1a of the return yokes 1, 1, which are machined divided members, are in contact with each other, a space through which a vacuum duct is passed, a coil mounting portion, and the like are processed. 2a, the divided members 1, 1
A cut-out portion 12 into which a rectangular positioning piece 11 shown in FIG.

Then, when the divided members 1 and 1 are reassembled, the positioning pieces 11 are kept until the processing surface of the notch 12 becomes smooth.
Pressing the division members 1 adjacent the X, Y direction by. If the processing surface of the adjacent notch 12 becomes smooth, the intended processing / assembly accuracy is reproduced at that time. At that time, the divided blocks are fixed with bolts 8.

Then, the positioning piece 11 is fixed to the cutout portion 12 with fixing bolts 13. However, in some cases, the positioning piece 11 may be removed after being fixed by the through bolt 8.

The assembled electromagnet is positioned on the gantry 4 by the key 9 so that the core coincides with the vacuum duct 5 in the longitudinal direction. In the above embodiment, a rectangular piece is used as the positioning piece, but a round bar or a sphere having a circular cross section may be used.

Further, as shown in FIG. 3, for example, a positioning piece 15 having an angled cross section is pressed against the corners of the abutting portions of the divided members 1 and 1 without forming a cutout or the like on the divided member side. By making the contact portions of the divided members 1 and 1 smooth without any step, the intended processing and assembling accuracy can be reproduced. Alternatively, the positioning may be performed one surface at a time using a flat positioning piece.

[0021]

According to the present invention, there is no problem such as seizure due to the conventional knock pin, deformation of the pin hole, and the like, and the production cost is lower than that of the fitting structure, the workability is good, and the re-assembly accuracy can be greatly improved.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a quadrupole electromagnet as an example to which the method of the present invention is applied.

FIG. 2 is an explanatory perspective view of a notch and a positioning piece.

FIG. 3 is an explanatory perspective view of another positioning piece.

FIG. 4 is an explanatory view of a conventional positioning method using a knock pin.

FIG. 5 is an explanatory view of a positioning method using a conventional fitting structure.

[Explanation of symbols]

1 ... divided member (return yoke), 11, 15 ... positioning piece, 12 ... notch.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hideyuki Miyamoto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Masaru Hirota 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan (56) References JP-A-4-125306 (JP, A) JP-A-63-187712 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23P 19/00 304 F16B 19/02

Claims (2)

(57) [Claims] 1. A method for assembling an assembly in which a plurality of divided members are assembled by abutting an abutting surface formed on each of the divided members. Using a positioning piece that fits and abuts across the two divided members, and separates the positioning piece during the assembly of the divided member
It is brought into contact with the surface of the no dividing members than penetrate substantially the divided so that a gap is eliminated between the two divided members and the piece to be adjacent to press the pin <br/> over scan A method for assembling an assembly, comprising positioning a member and assembling the member. 2. The positioning piece is formed in a rectangular shape, and a cutout portion for fitting the rectangular positioning piece is formed at an end of the positioning piece over an abutting portion of adjacent divided members. The method for assembling an assembly according to claim 1.