JP2571909B2 - Shaft end drawing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus for drawing an end of a wire rod.

[0002]

2. Description of the Related Art When a long wire is cut into a length according to the purpose of use, the cut end becomes sharp and dangerous,
2. Description of the Related Art Draw-drawing an end of a wire into a frustoconical shape or the like has been performed.

In a conventional drawing apparatus, a plurality of drawing rollers are rotatably mounted on a head mounted on a rotating shaft, a wire is supplied between the drawing rollers along the axial direction, and the rotation and rotation of the drawing rollers due to the rotation of the head. Thereby, the end of the wire is narrowed.

[0004]

When the end of the wire is drawn into a truncated cone shape using only a drawing roller, the wire is squeezed at the boundary between the outer shape and the truncated cone due to the escape of the narrowed material. There is a problem that occurs.

An object of the present invention is to provide a drawing apparatus for a shaft end which can suppress the occurrence of burrs when drawing the end of a wire and can perform drawing excellent in shape. It is in.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a head mounted on a rotating shaft, which is located on both sides of the rotating shaft of the head and is supplied along the axial direction. A pair of squeezing rollers for squeezing the end of the shaft material into a predetermined shape, located on both sides between the squeezing rollers,
Correction rollers for suppressing generation of burrs at the time of drawing are sandwiched between both sides of the outer peripheral surface of the wire rod so as to be rotatable, and a backup roller is brought into contact with the outer peripheral surface of the correction roller.

[0007]

When a shaft is supplied between a pair of squeezing rollers while the head is mounted on a rotating shaft and rotated, the squeezing roller revolves around the axis of rotation and draws the end of the shaft into a predetermined shape. Go.

At this time, the correction roller revolving around the rotation axis rolls and rotates on the outer peripheral surface of the shaft material to suppress generation of burrs on the outer peripheral surface of the shaft material drawn by the drawing roller. The end of the material is drawn with high precision.

[0009] Since the outside of the correction roller is supported by the backup roller, it has an excellent rolling pressure against the shaft material, the diameter of the correction roller can be reduced, and the correction roller can be easily incorporated into the head.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the whole structure of a drawing machine. A rotary drive 3 is vertically mounted on an upper end of a column 2 erected on a base 1, and the rotary drive 3 is mounted on a lower end of a rotary shaft 5 driven by a motor 4. In addition to mounting the drawing apparatus 6 of the present invention, a lifting table 7 attached to the front side of the column 2 so as to move up and down can be moved up and down by a jack 8, and a chuck 9 for holding the shaft material A on the lifting table 7 is provided. The shaft A whose lower end is fixed by the chuck 9 is arranged coaxially with the rotary shaft 5, and the upper end faces directly below the drawing apparatus 6.

As shown in FIGS. 2 to 5, the drawing apparatus 6 includes a mounting member 13 having a screw hole 12 for mounting the rotary shaft 5 on the upper surface of a head 11 formed in a circular block shape. 14, and the lower surface opening of the concave portion 15 provided on the lower surface side of the head 11 is
And a pair of squeezing rollers 18, 18, a pair of correction rollers 19, 19, and a backup contacted to the outside of both correction rollers 19, 19 inside the recess 15. Rollers 20, 20 and 20, 20
Is incorporated.

As shown in FIG. 4, a pair of squeezing rollers 18, 18 are connected to a shaft 2 fixedly supported by a head 11 and a lid plate 17.
1 is rotatably supported via a bearing 22, and both ends in the axial direction are supported by thrust bearings 23, 23.

The outer peripheral surfaces of the drawing rollers 18 serve as a drawing surface of the shaft material A. In the case of the drawing, the shaft material A is shaped into a truncated cone.

The pair of squeezing rollers 18, 18 are attached at positions equidistant on both sides of the rotation axis of the head 11.

The correcting rollers 19, 19 are shown in FIGS.
As shown in FIG. 2, the roller 11 is formed in a circular axis shape, is rotatably supported by the head 11 via a bearing 24, and is located at both sides of the rotation axis of the head 11 between the aperture rollers 18 and 18. Are located.

The pair of squeezing rollers 18, 18 described above,
The pair of correction rollers 19, 19 are arranged at a right angle in a plan view, and the squeezing rollers 18, 18 draw the shaft material A between the outer peripheral surfaces which are closest to each other.
Are arranged so as to sandwich the diameter of the shaft material A between the outer peripheral surfaces which are closest to each other.
The correction rollers 19, 19 are smaller in diameter than the squeezing rollers 18, 18, so that the shaft material A is interposed between the squeezing rollers 18, 18, and does not interfere with the squeezing rollers 18, 18.

The backup rollers 20, 20, and 2
0, 20 are the correction rollers 19, 19, as shown in FIG.
Rollers 19, 19
2 and 3, it is rotatably mounted on the cover plate 17, and the outer ends of the correction rollers 19, 19 are positioned by the tip portions of the correction rollers 19, 19, as shown in FIGS. I am going to receive it.

A hole 25 for inserting the shaft member A is provided at the center of the cover plate 17.

The drawing apparatus according to the present invention is constructed as described above. As shown in FIG. 1, the drawing apparatus 6 is mounted on the rotating shaft 5 of the rotary driving machine 3, and the shaft material is moved by the chuck 9 at the lowered position. With the A held, the drawing apparatus 6 is rotated, the chuck 9 is raised, and the upper end of the shaft material A is placed in the hole 25 of the cover plate 17.
From the head 11.

The upper end of the shaft member A is as shown in FIG.
The shaft material A is cut at a right angle, and when this shaft material A enters a predetermined stroke between the squeezing rollers 18 along the rotation axis of the head 11, as shown in FIG. Squeezing rollers 18 and 18 that roll while rotating
, The tip of the shaft material A is drawn into a truncated cone shape.

At the same time, the leading end of the shaft member A enters between the pair of correction rollers 19, 19, and corrects the outer peripheral surface below the drawn portion a as shown in FIG. 6B. The rollers 19, 19 roll while rotating.

When the shaft member A is fed in the axial direction between the drawing rollers 18 and 18 and subjected to drawing, burrs are generated at the boundary between the drawn portion a and the outer diameter of the shaft member A due to the escape of the material. However, the correction rollers 19, 19
Since the outer peripheral surface of the shaft member A is rolled from both sides, the occurrence of burrs can be suppressed by the correction rollers 19, 19, and as a result, as shown in FIG. After the drawing, the chuck 9 may be lowered to remove the shaft material A from the head 11.

[0024]

As described above, according to the present invention, a pair of squeezing rollers and a correction roller at a position between the squeezing rollers are provided at both sides of the rotation axis of the head. Since the outer peripheral surface of the shaft is rolled by the correction roller during the drawing process of the end, the occurrence of burrs due to the drawing process can be suppressed by the correction roller, and the end of the shaft material is removed after deburring. A drawing process that does not require processing can be performed.

Further, since the backup roller is in contact with the outside of the correction roller, the diameter of the correction roller can be reduced by improving the strength of the correction roller, and the correction roller can be easily incorporated into the head, and the size of the head can be reduced. Will be possible.

[Brief description of the drawings]

FIG. 1 is a front view of a drawing machine using a drawing device of the present invention.

FIG. 2 is an exploded perspective view of a drawing apparatus.

FIG. 3 is a partially cutaway bottom view of the drawing apparatus.

FIG. 4 is a longitudinal sectional view taken along arrow IV-IV in FIG. 3;

FIG. 5 is a longitudinal sectional view taken along the arrow VV in FIG. 3;

FIG. 6A is a partially cutaway front view showing a drawing state by a drawing roller, and FIG. 6B is a front view showing a rolling state of a shaft material by a correction roller;

FIG. 7A is a perspective view showing a cut end of a shaft, and FIG.
Is a perspective view showing the state of the drawing process with respect to the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Head 15 Concave part 17 Cover plate 18 Squeeze roller 19 Correction roller 20 Backup roller A Shaft

Claims (1)

(57) [Claims] 1. A pair of apertures which are located on both sides of a rotation axis of a head mounted on a rotation shaft and which are formed by drawing an end of a shaft material supplied along an axial direction into a predetermined shape. A roller and correction rollers located on both sides between the drawing rollers and holding the outer peripheral surface of the wire from both sides to suppress the generation of burrs during drawing are rotatably mounted, and a backup roller is provided on the outer peripheral surface of the correction roller. Of the end of the shaft material with which the shaft is in contact.