JP2000343172A - Collar molding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently mold a protrusion part of large diameter but narrow width at a middle part of a metallic axis material or metallic pipe by installing a means for displacing an axial core of a rotation axis to be a bending support point between holding parts of a work for adjusting a slide volume. SOLUTION: A drive means mounting member 31 is pivotally mounted to a void part 20a of a holding member of a slide frame, and a nut member 32 is pivotally mounted to a void part installed to a rail member 24 of a rotation frame 21 rotatably. A motor 33 is mounted to the drive means and a male thread 34 is mounted to an output shaft of the motor 33, so as to spirally engage a deflection means 30 to the nut member 32. The male thread 34 is rotated by normal and reverse rotations of the motor 33, and the rotation frame 21 is rotated by movement of the nut member 32 while the rotating support axis is a base end, so as to rotate a couple-driven rotation part 25. A work held by a chuck member is rotated by driving the motor 14, and a slide pressurizing means 26 is actuated, so that the compressed pressure acts on the work. The work is bent by the deflection means 30, so as to mold a given collar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for locally expanding an intermediate portion of a metal shaft or a metal pipe.

[0002]

2. Description of the Related Art Conventionally, when a collar is provided in an intermediate portion of a metal shaft, a method of shaving a shaft having a larger diameter than the diameter of the shaft into a shape having a desired collar portion is used. A method of welding a part to a shaft has been adopted. However, in the case of the former, not only is it time-consuming to cut, but also wasteful in terms of material, which is uneconomical,
Also, it has been difficult to cut out a collar in the middle of a long object. Further, in the latter case, there is a problem that it is affected by welding heat.

In order to solve this problem, the present inventor has invented a method of applying rotation, compression pressure and bending to a metal shaft as a method of locally forming a collar at an intermediate portion of the metal shaft. , Has obtained a patent (Japanese Patent No. 1
No. 993956). According to this technique, the collar can be easily formed on the metal shaft or the intermediate portion of the metal pipe, so that it is not necessary to perform cutting or welding as in the related art.

In this working method, rotation, compression pressure, and bending are applied to a metal shaft. Ideally, a bending fulcrum is always located at an intermediate portion between both holding portions during the progress of color molding. . However, the conventional color molding apparatus has a configuration in which a rotation support shaft serving as a bending fulcrum is fixed to one holding portion, and approaches the other holding portion as the color molding progresses. Therefore, in the conventional color molding device, the minimum width of the collar is when the interval between the two holding portions is equal to the interval between the end surface of the holding portion on the side where the rotation support shaft is fixed and the axis of the rotation support shaft, And the maximum diameter. In other words, it was not possible to mold a color larger than this color diameter.

[0005]

In view of the above-mentioned problems, the present invention has been made in consideration of the above-mentioned problems, and in a color forming apparatus for applying compression pressure, bending and rotation to a metal shaft or a metal pipe as a work, a collar having a larger diameter is used. It is an object of the present invention to provide a color molding apparatus provided with a mechanism for displacing the axis of a rotating shaft serving as a bending fulcrum between both holding portions for molding.

[0006]

The present invention has been made as follows in order to solve the above-mentioned problems. In other words, a rotating part and a driven rotating part which are provided with a holding part for holding a metal shaft material or a metal pipe as a work, and rotate the work around an axis in a state where the work is held in the holding part of the driving rotating part. Drive means for driving, a sliding pressurizing means for relatively moving the driven rotating part in a direction approaching / separating from the driving rotating part, and a biasing means for inclining the driven rotating part with respect to the axis of the holding part of the driving rotating part. In the color molding apparatus comprising: a pressurizing unit for slidingly moving the axis of a rotation shaft serving as a starting point of rotation when the driven rotating unit is inclined by the biasing means in a direction approaching or moving away from the driving rotating unit; And a displacement mechanism for relatively moving the axis of the rotation shaft between the two holding portions by adjusting the sliding amount of each sliding and pressing means.

Further, a holding portion for holding a metal shaft material or a metal pipe as a work is provided, and a drive rotating portion and a driven rotating portion facing each other, and the work is held while holding the work in the holding portion of the driving rotating portion. Drive means for rotating around, bias means for inclining any one of the rotating parts with respect to the axis of the holding part of the other rotating part, and rotation which is the starting point of rotation when biased by the biasing means In a color molding apparatus comprising a sliding and pressing means for relatively moving the two rotating parts in a direction of approaching / separating from the axis of the support shaft, the two holding parts are adjusted by appropriately adjusting the sliding amount of the sliding and pressing means. A displacement mechanism for relatively moving the axis of the rotation support shaft between the portions is provided.

[0008]

By using this color molding apparatus, the intermediate portion of a metal shaft or a metal pipe as a work is locally bulged and formed.
In order to provide a collar, first, both rotating parts are arranged so that their axes are located on the same straight line, and the work is held by the holding parts. At this time, a predetermined distance D is provided between the two holding portions.
Take. Then, the work is rotated around the axis by rotating at least one of the rotating parts while bringing at least one holding part close to the other holding part and applying a compressive pressure to the work. Thereafter, at least one holding portion is inclined with respect to the axis of the other holding portion, and the work is bent. The compression pressure is a magnitude that makes the tensile force generated outside the bend zero or no load. In this state, the projections generated inside the bend are accumulated over the entire circumference of the work due to the rotation of the work, and a desired color can be obtained.
When the desired collar is obtained, the work is straightened, the compression pressure and rotation are stopped, and the molding is completed.

In this color molding apparatus, one rotating portion is fixed to a frame, and the other rotating portion is rotatably mounted on a sliding frame which is relatively movable in a direction approaching / separating from the rotating portion. The movable frame is provided so as to be relatively movable in a direction approaching / separating from a rotation support shaft serving as a rotation start end on the rotation frame. Then, at the time of color molding, one of the holding portions is moved closer to the rotation support shaft to apply a compressive pressure to the work, and the sliding frame is moved closer to the other rotation portion, thereby forming the rotation support shaft. The position can be located between the two holding parts. That is, since the rotation support shaft can always be displaced between the two holding portions, a large-diameter and narrow-width collar can be formed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically while exemplifying embodiments of the present invention shown in the drawings.

1 to 4, in this color molding apparatus 1, a column 3 is erected on a base 2 installed on a floor.
A rectangular frame 4 in a plan view is provided on the upper part thereof. A drive rotating unit 5 is provided at a front end (left side in FIG. 1) of the frame 4, and an attachment member 7 of a sliding pressure unit 6 described later is provided at a rear end. The side frames 8 of the frame 4 are provided with concave grooves 8a in a sectional view.

The driving rotary section 5 has a cylindrical holding cylinder 11 rotatably supported by a supporting cylinder 10 fixed to a left-right member 9 of the frame 4, and a front end of the holding cylinder 11 is driven by the holding cylinder 11. A gear 12 is mounted. Further, inside the holding cylinder 11, chuck members 13, 13 for holding the work W are fitted as holding parts. For this reason, a predetermined taper angle is provided at the rear end portion of the inside of the holding cylinder 11 and the outer peripheral portion of the chuck members 13, 13, and the chuck members 13, 13 are pressed into the holding cylinder 11 while holding the work W. Thus, the work W is held.

A motor 14 serving as a drive source for rotating the work W is provided below the holding cylinder 11, and a drive gear 15 attached to an output shaft of the motor 14 meshes with the driven gear 12.

Reference numeral 16 denotes a sliding frame which is relatively movable in a direction approaching / separating from the driving rotary unit. The sliding frame 16 is formed in a substantially rectangular shape in a plan view.
A convex portion which can be fitted into the groove portion 8a is provided.
Is fixed. As a sliding pressurizing means 6 of the sliding frame 16, a reciprocating fluid cylinder 19 is mounted between the mounting member 7 provided at the rear end of the frame 4 and the member 18. The holding member 2 of the fluid cylinder 19 is provided at the rear of the sliding frame 16.
0 is fixed. The sliding frame 16 moves back and forth by the expansion and contraction of the fluid cylinder 19.

A rotating frame 21 is provided on the upper surface of the sliding frame 16. The rotating frame 21 has a rotating support shaft 23 fixed to the front portion of the lower surface of the plate 22, and a pair of rail bodies 24, 24 provided with grooves 24 a fixed to the upper surface of the plate 22. Further, the rail body 2
At the rear ends of the rollers 4 and 24, a mounting member 28 of a fluid cylinder 27, which is a sliding pressurizing means 26 of a driven rotating unit 25 described later, is mounted. The rotating frame 21 is mounted on the sliding frame 16 so as to be rotatable.

A driven rotating unit 25 is mounted on the rotating frame 21 so as to face the driving rotating unit 5. The driven rotary unit 25 has substantially the same configuration as the drive rotary unit 5, and the same parts are denoted by the same reference numerals. In addition,
The support cylinder 10 of the driven rotation unit 25 is
1 is fixed to a member 29 having a convex portion that slides in the grooves 24a so as to be able to move back and forth along the rails 24 provided in 1. Further, the member 2
A fluid cylinder 27 is mounted as the sliding pressure means 26 between the mounting member 9 and the mounting member 28 of the rotating frame 21. The expansion and contraction of the fluid cylinder 27 allows the driven rotation unit 25 to move back and forth with respect to the rotation frame 21.

In this embodiment, a fluid cylinder is used as the sliding pressurizing means. However, any means capable of moving the sliding frame back and forth can be used. No problem.

Reference numeral 30 denotes a biasing means. The biasing means 30 has a driving means mounting member 31 rotatably mounted on the hole 20a of the holding member 20 of the sliding frame 16 and a hole formed in the rail body 24 of the rotating frame 21. 24b
A nut 33 is rotatably mounted on a shaft, and a motor 33 is mounted as a driving means. A male screw 34 is mounted on an output shaft of the motor 33 and screwed to the nut 32. That is, by the forward / reverse rotation of the motor 33,
When the male screw 34 rotates and the nut member 32 moves, the rotating frame 21 is rotated with the rotating support shaft 23 as a base end.
Rotate. That is, the driven rotation unit 25 provided on the rotation frame 21 rotates.

Although the drawings do not show control devices for the motors 14 and 33 and the fluid cylinders 19 and 27, the motor 33 can control forward and reverse rotations, and the fluid cylinders 19 and 27 Can be controlled appropriately.

As described above, in the present embodiment, the drive rotating unit 5 fixed to the front part of the frame 4 can rotate the work W by the motor 14. further,
The driven rotary unit 25 provided to face the drive rotary unit 5 is relatively movable with respect to the drive rotary unit 5 in a direction approaching / separating from the drive rotary unit 5 by sliding and pressing means 6, 26, and is controlled by a bias means 30. It can be inclined with respect to the axis of the drive rotating unit 5, and when the rotation support shaft 23 approaches the drive rotating unit 5 by the sliding and pressing unit 6, the sliding and pressing unit 26 can be tilted.
Thus, the driven rotation unit 25 can be brought closer to the rotation support shaft 23. That is, the sliding pressure means 6, 2
By appropriately adjusting the sliding amount of 6, the configuration is such that the axis of the rotation support shaft 23 can be relatively moved between the two holding portions 13 at all times.

When using the color molding apparatus 1 in the above embodiment, first, both rotating parts 5, 25 are arranged so that their respective axes are located on the same straight line. Then, the work W is inserted into the chuck members 13, 13 which are holding portions, and the work W is held by the respective chuck members 13, 13. Then, the motor 14 is driven to rotate the work W. Further, the sliding pressure means 6 and 26 are operated to apply a compression pressure to the work W. Thereafter, the work W is bent by the biasing means 30. Note that the compression pressure is a magnitude that changes the tensile force generated outside the bending by the bending of the work W to zero or a non-load. When the compression pressure is weak, the work W is repeatedly subjected to compression and elongation, and the work W may be broken. And work W
By continuing to rotate while applying bending and compression pressures to the desired shape, a desired collar is formed. If a desired collar can be formed, the biasing means 30 is kept in a state where the compression pressure and rotation are applied.
It is sufficient to arrange the rotating parts 5 and 25 so that the axes thereof are located on the same straight line, and straighten the workpiece W by rotating it several times. Thereafter, if any one of the sliding and pressurizing means 6 and 26 is shortened, the work W can be extracted from the holding unit 13.

In this color molding apparatus 1, when the driven rotary unit 25 is brought closer to the drive rotary unit 5 as shown in FIG.
Is brought closer to the drive rotation unit 5. Further, the sliding pressure means 2
6 causes the driven rotation unit 25 to approach the rotation support shaft 23 on the rotation frame 21. In other words, the driven rotation unit 25 is rotated by the rotation support shaft 23 by the amount that the rotation support shaft 23 approaches the drive rotation unit 5.
, And the axis of the rotation support shaft 23, which always serves as a bending fulcrum, is located between the holding portions 13, 13. As a result, even when the color forming is in progress, the convex portion generated inside the bending of the work W always occurs near the center of the holding portions 13, 13, so that the color forming can be performed efficiently.

FIGS. 6 and 7 show another embodiment different from the above embodiment. In the above embodiment, the drive rotary unit 5 is fixed to the frame 4. The bearing member 18 of the shaft 23 is fixed to a frame, and the rotating frame 21 is mounted on the bearing member 18.
A driven rotating unit 25 is provided on the rotating frame 21 so as to be relatively movable in a direction approaching and moving away from the rotating support shaft 23, and further along the side frame 8 of the frame 4,
The sliding frame 16 is relatively movable in the direction of approaching / separating.
, And a drive rotating unit is fixed on the sliding frame 16. Also in this embodiment, similarly to the above-described embodiment, by appropriately adjusting the sliding amount of the pressure sliding means 6, 26, the axis of the rotation support shaft 23 can be positioned between the holding portions 13, 13. It is possible. Other parts are the same as those of the above-described embodiment, and the same parts are denoted by the same symbols.

Further, in the color molding apparatus according to the present invention, by equalizing the sliding amount of the above-mentioned sliding and pressing means 6, 26, the center of the rotation supporting shaft which always becomes a bending fulcrum at the intermediate portion between both holding portions is provided. Can be displaced, and molding in this state can be processed most efficiently.

[0025]

As described above, in the color forming apparatus according to the present invention, when forming is progressed while bending the workpiece, the axis of the rotating support shaft which always serves as a bending fulcrum is positioned between the two holding members. Is provided, and a convex portion always generated inside the bend can efficiently bulge the work. This makes it possible to efficiently form a large-diameter collar.

[Brief description of the drawings]

FIG. 1 is an overall plan view of a color molding apparatus according to the present invention.

FIG. 2 is an overall side sectional view of the same.

FIG. 3 is a plan view showing the sliding frame and the rotating frame (imaginary line).

FIG. 4 is a side sectional view thereof.

FIG. 5 is an explanatory diagram of a processing state.

FIG. 6 is a plan view showing an embodiment different from the above.

FIG. 7 is an overall side sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Color molding apparatus 4 Frame 5 Drive rotation part 6 Sliding pressurizing means 16 Sliding frame 21 Rotating frame 25 Follower rotating part 26 Sliding pressurizing means 30 Biasing means

Claims (2)

[Claims] 1. A drive rotating unit and a driven rotating unit which are provided with a holding unit for holding a metal shaft material or a metal pipe as a work, and a work rotating unit which holds a work in a holding unit of the driving rotating unit. A driving unit for rotating the driven rotation unit, a sliding pressure unit for relatively moving the driven rotation unit in a direction approaching / separating from the driving rotation unit, and an inclination of the driven rotation unit with respect to the axis of the holding unit of the driving rotation unit. In a color molding apparatus comprising a biasing means, when the driven rotating part is tilted by the biasing means, a slide for relatively moving an axis of a rotating shaft serving as a starting point of rotation in a direction approaching / separating from the driving rotating part. Color molding, comprising a dynamic pressure means, and a displacement mechanism for relatively moving the axis of said rotary shaft between both holding parts by adjusting the sliding amount of each sliding pressure means. apparatus. 2. A drive rotating unit and a driven rotating unit which are provided with a holding unit for holding a metal shaft material or a metal pipe as a work, and a work shaft is held in a state where the work is held by the holding unit of the driving rotating unit. Drive means for rotating around, bias means for inclining any one of the rotating parts with respect to the axis of the holding part of the other rotating part, and rotation which is the starting point of rotation when biased by the biasing means In a color molding apparatus comprising a sliding and pressing means for relatively moving the two rotating parts in a direction of approaching / separating from the axis of the support shaft, the two holding parts are adjusted by appropriately adjusting the sliding amount of the sliding and pressing means. A color molding device comprising a displacement mechanism for relatively moving the axis of the rotation support shaft between the portions.