JP2505820B2 - Manufacturing method of primary core of linear pulse motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a method of manufacturing a primary side iron core of a linear pulse motor.

(Prior Art) A primary electric core of a linear pulse motor is usually made of a thin electric iron plate in order to reduce iron loss. This is punched into a required shape by press working, and the punched iron plates are laminated, Manufactured by fastening with pins etc. However, the dimensional error of the iron plate due to pressing is usually 10% of the thickness of the iron plate.
There is a degree, and a 0.5 mm thick iron plate will cause a dimensional error of 0.05 mm. Therefore, a linear pulse motor equipped with an iron core manufactured by such a processing method has a large stop position error, and it is difficult to reduce the gap between the primary and secondary iron cores. In some cases, unnecessary vibration was generated.

(Problems to be Solved by the Invention) As described above, a linear pulse motor having an iron core manufactured by press working generally has low stopping accuracy,
The thrust is also relatively small. As a measure against this, in order to reduce the dimensional error of the punched iron plate, reduce the plate thickness,
It was considered to use a more precise mold, but it was difficult to obtain a plate thickness of 0.3 mm or less, and the space factor decreased, and the precision mold had a cost problem.

The present invention was made in view of such a point, and an object thereof is to provide a method for manufacturing a primary side iron core of a linear pulse motor having a small dimensional error (0.01 mm or less) by milling. It is a thing.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention forms an iron core material by laminating an appropriate number of electric iron plates, and the same as the laminating surface of the electric iron plates. It is sandwiched by a sized sandwiching plate, integrated by a fastening member, and after machining the magnetic pole of the iron core material with the sandwiching plate by milling, the unnecessary parts of the sandwiching plate are removed by cutting,
The magnetic pole is formed.

(Operation) As described above, in this processing method, the core material made of the laminated electric iron plates is sandwiched by the sandwiched plate having the same size as the laminated surface and integrally fastened, and by the milling process,
The cutting of the magnetic poles of the iron core material is carried out together with the clamping plate. Unnecessary parts of the sandwich plate are then cut away. Therefore, "turning" and "blur" of the iron core material do not occur. In this way, it is possible to manufacture a primary iron core having magnetic poles with small dimensional error.

(Example) Next, an example of the present invention will be described with reference to the drawings. The primary side of the linear pulse motor of this embodiment is
Two magnetic poles, as shown in Fig. 3 (finished diagram),
It is a two-row type. The electric iron plate 1 has a strip shape as shown in FIG. 1 and has four fastening holes 3.

As shown in Fig. 2, a proper number of these are laminated to form the core material 5,7
And is sandwiched by the two side plates 9 and 11 and the intermediate plate 13 which are sandwiching plates and fastened by four bolts 15 which are fastening members. The size of the fastening surfaces of the side plates 9 and 11 and the intermediate plate 13 is the same as the size of the laminated surface of the iron core materials 5 and 7, as shown in the figure.

The fastened iron core material is attached to the milling machine, and the magnetic pole teeth of the portions corresponding to the magnetic poles 17,19,21,23 shown in FIG. 3 are attached to the side plates 9,11.
And a part of the intermediate plate 13 is cut.

After machining the magnetic pole teeth, the magnetic poles of the iron core material and their ends are cut and removed together with the side plates 9 and 11 and the intermediate plate 13, and finally, the side plates 9 and
An unnecessary portion in the longitudinal direction of 11 and the intermediate plate 13 is cut and removed to form a magnetic pole. After forming the magnetic pole, the upper surface of the magnetic pole tooth is ground to be smooth.

In this cutting process, the first or the last plate of the laminated electric iron plate of the iron core material is cut together with the side plate or the intermediate plate, so that “bull” or “baldness” does not occur.

In this way, the primary side of the linear pulse motor with extremely small dimensional error of the magnetic poles can be manufactured.

[Effects of the Invention] As can be understood from the above description, since the present invention has the configuration described in the claims, the primary side iron core manufactured by this method has an extremely small dimensional error in each part. . Therefore, the linear pulse motor provided with this primary side iron core has a high stopping accuracy, a large thrust force, and a small vibration.

[Brief description of drawings]

FIG. 1 is a diagram showing the shape of an electric iron plate used in an embodiment of the present invention, FIG. 2 is an assembly diagram of an iron core material for milling, and FIG. 3 is an outer shape of a primary side iron core after milling. It is a figure. Explanation of the symbols that represent the main parts of the drawing 1 …… Electric iron plate, 5,7 …… Iron core material 9,11 …… Side plate, 13 …… Intermediate plate 15 …… Fastening bolts 17, 19, 21, 23 …… Magnetic pole

Claims (1)

(57) [Claims] 1. An iron core material is formed by laminating an appropriate number of electric iron plates, sandwiched by a sandwich plate having the same size as the laminated surface of the electric iron plates, integrated by a fastening member, and milled to form a magnetic pole of the iron core material. Of the primary side iron core of the linear pulse motor, characterized in that the magnetic poles are formed by cutting away unnecessary portions of the gripping plate after processing