JPH04121049A - Manufacture of clad column for linear motor - Google Patents

Abstract

PURPOSE:To improve adhesive strength of a core material to a pipe by forming uneven grooves on a core material, then covering it with a pipe of high conductivity conductor, and carrying out drawing process. CONSTITUTION:An iron-aluminum clad column 10 has a core material 11 of a magnetic material made of iron provided with female threads 13, 14 at coupling threaded parts of both ends and formed with uneven grooves of longitudinal groove, lateral groove, oblique groove or combination thereof on the side periphery, and a pipe 12 of high conductivity conductor made of aluminum to be engaged with the groove on its inner periphery. The column 10 is formed with the groove on the material 11, then covered with the pipe 12, and drawn. Thus, the inside of the pipe intrudes into the groove of the core material, thereby providing strength against shearing tension in vertical or rotating direction. Accordingly, it can sufficiently endure against a torque generated during thread engaging and a thrust generated during use.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a clad column for a linear motor used in an elm beater or the like using a linear motor.

[Conventional technology]

In recent years, elevators using linear motors have been developed, and these linear elevators use a column consisting of an iron column made of magnetic material and covered with aluminum pipe, which is a good conductor. and,
In manufacturing the above-mentioned clad columns, aluminum pipes are attached to an iron cylindrical body in a boundary or cold area.

[Problem to be solved by the invention]

However, during use, the shearing force due to the thrust generated in the clad column acts between the core material and the aluminum pipe, sometimes causing vertical displacement.

In addition, when screwing a large number of clad columns together, torsional torque is applied to the aluminum pipes, but if the connection between the core material and the aluminum pipes is weak, only the outer aluminum pipes will rotate. There was a problem in that sufficient torque could not be transmitted to the internal screws.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a clad column for a linear motor that has a strong bond between the outer pipe made of a good conductor and the core material.

(Means for Solving the Problems) A method for manufacturing a clad column for a linear motor according to the present invention in accordance with the above object is a linear motor in which a core material made of a magnetic material is provided with coupling threads at both ends, and a core material made of a magnetic material is coated with a good conductor. In a method for manufacturing a clad rod for a motor, uneven grooves consisting of vertical grooves, horizontal grooves, diagonal grooves, or a combination thereof are formed in advance on the entire surface of the core material, and then the core material is inserted into the pipe of good conductor. It is constructed by drawing a pipe with an internal interior.

[Function] In the method for manufacturing a clad column for a linear motor according to the present invention, uneven grooves consisting of vertical grooves, horizontal grooves, diagonal grooves, or a combination thereof are formed in advance on the entire surface of the core material, and then, the grooves are formed in the pipe of a good conductor. Since the pipe is inserted into a pipe and subjected to drawing processing, the inside of the pipe, which is a good conductor, bites into the uneven grooves on the surface of the core material, thereby providing strength against shearing and pulling in the vertical direction or rotational direction.

Therefore, it can sufficiently withstand the torque generated during screw tightening and the thrust generated during use.

[Example] Next, examples embodying the present invention will be described to provide an understanding of the present invention.

Here, FIG. 1 shows a steel plate manufactured by applying the method for manufacturing a clad column for a linear motor according to an embodiment of the present invention.
A partially cutaway cross-sectional view of an aluminum clad column is shown.

As shown in FIG. 1, an iron-aluminum clad column 10 according to an embodiment of the present invention has a length of 1500 mm and a diameter of 10 mm.
It has a core material 11 made of a cylindrical body made of iron (525C) with a diameter of 0 mm, and a pipe 12 with a thickness of 5 II made of aluminum, which is an example of a good conductor, surrounding the outside of the core material 11.

Female threads 13 and 14, which are examples of coupling threads, are cut into both ends of the core material 11, so that the iron-aluminum clad columns 10 can be connected for a predetermined length using twin bolts (not shown).

When manufacturing the iron-aluminum clad column 10,
The surface of the core material 11, which is a round bar cut to a predetermined length, is subjected to a low left processing to a depth of 1/100 to 1/10 vw, and then the core material 11 is loosely fitted into the pipe 12.

It is sufficient if the gap at this time is about 0.1 to 1 mm.

Then, the pipe 12 is passed through a die having a diameter slightly smaller than that of the pipe 12, and a drawing process is performed.
The inner side of the pipe 12 undergoes plastic deformation and fits into the uneven groove created by the knurling process, and the pipe 12 is firmly attached to the core material 11.
It will bite into the surface.

Table 1 shows the shear strength (A) of the joint of the iron-aluminum clad column 10 manufactured through the above process and the shear strength (A) of the joint of the iron-aluminum clad column manufactured by the conventional method. (B) is shown.

Table 1 Accordingly, from Table 1, the iron-aluminum clad column 10 manufactured by applying the method of the present invention has a very large adhesive force.

In addition, in this example, unevenness was formed on the surface of the core material 11 by low left processing, but it was confirmed that similar shear strength was obtained when uneven grooves were formed on the surface of the core material by thread cutting. It was done.

In the above embodiment, an iron-aluminum clad column has been described, but the present invention is applicable even if copper or other metal is used as a good conductor and the shape of the uneven grooves is slightly different.

〔Effect of the invention〕

As is clear from the above description, the method for manufacturing a clad column for a linear motor according to the present invention involves forming uneven grooves on the surface of the core material, then covering it with a good conductor pipe, and performing a drawing process. The pipe, which is a good conductor, bites into the uneven grooves, resulting in a dramatic improvement in adhesive strength.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of a Talarad column manufactured by the method of the present invention. [Explanation of symbols] 10----iron-aluminum clad column, 11 core material,
12-・-1111--pipe

Claims (1)

[Claims] (1) In a method for manufacturing a clad rod for a linear motor, in which a core material made of a magnetic material is provided with coupling threads at both ends, and a good conductor is coated around the core material, a vertical groove is formed on the entire surface of the core material in advance.
A cladding for a linear motor, characterized in that an uneven groove consisting of a horizontal groove, a diagonal groove, or a combination thereof is formed, the cladding is then inserted into a pipe of the above-mentioned good conductor, and the pipe with the core material inside is subjected to a drawing process. Column manufacturing method.