JP3424000B2 - Color molding equipment - Google Patents

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 bulging a metal shaft or an intermediate portion of a metal tube.

[0002]

2. Description of the Related Art Conventionally, when a collar is provided in the middle of a metal shaft member, a shaft member having a diameter larger than the diameter of the shaft member is used as a raw material, and is cut into a shape having a desired collar portion, or another method. The method of welding the parts to the shaft material is adopted. However, in the case of the former, it is uneconomical because not only is it time-consuming to cut, but also wasteful in terms of materials.
Moreover, it was difficult to cut out a collar in the middle part of a long product. Further, in the latter case, there is a problem that it is affected by welding heat.

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

In this processing method, rotation, compression pressure and bending are applied to the metal shaft material, but it is ideal that the bending fulcrum is always located at the intermediate portion between both holding portions when the color molding is in progress. . However, the conventional color forming apparatus has a structure in which the pivot shaft serving as a bending fulcrum is fixed to one holding portion and approaches the other holding portion as the color forming progresses. Therefore, in the conventional color molding apparatus, the minimum width of the collar is when the distance between the two holding portions becomes equal to the distance 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 it had the maximum diameter. That is, it was not possible to mold a collar having a diameter larger than this.

[0005]

In view of the above problems, therefore, in the present invention, in a color forming apparatus that applies a compressive pressure and bending and rotation to a metal shaft material or a metal tube which is a work, a collar having a larger diameter is used. Drive times to mold
It is an object of the present invention to provide a color molding device provided with a mechanism for displacing the axis of a rotating shaft serving as a bending fulcrum at an arbitrary position with respect to a rolling portion and a driven rotating portion .

[0006]

In order to solve the above problems, the present invention has the following features. That is, a drive rotating part and a driven rotating part which are provided with a holding part for holding a metal shaft material or a metal tube which is a work and face each other, and the work rotating around the axis while holding the work in the holding part of the drive rotating part. Driving means, sliding pressurizing means for relatively moving the driven rotating portion in a direction approaching and separating from the driving rotating portion, and biasing means for inclining the driven rotating portion with respect to the axis of the holding portion of the driving rotating portion. In the color molding apparatus, the sliding press for relatively moving the axis of the rotating shaft, which is the starting end of the rotation when the driven rotating portion is tilted by the biasing means, in a direction toward and away from the drive rotating portion. Means for adjusting the sliding amount of each of the sliding pressurizing means to drive and rotate the driven portion.
The axis of the rotating shaft at an arbitrary position relative to the rotating part
Is provided with a displacement mechanism for relatively moving.

Further, a drive rotating part and a driven rotating part, which are provided with a holding part for holding a metal shaft material or a metal tube which is a work, face each other, and the work is held in the holding part of the drive rotating part. Drive means for rotating around, biasing means for tilting one of the rotary parts with respect to the axis of the holding part of the other rotary part, and rotation for starting the rotation when biased by the biasing means In a color molding device comprising a slide pressurizing means for relatively moving both rotating parts toward and away from the axis of a support shaft , drive rotation is performed by appropriately adjusting the sliding amount of the slide pressurizing means. Department and driven times
The axis of the rotating shaft is located at an arbitrary position relative to the rolling portion.
Is provided with a displacement mechanism for relatively moving.

[0008]

With this color forming apparatus, the intermediate portion of the metal shaft material or the metal tube, which is the work, is locally bulged and formed,
In order to provide the collar, first, both rotating parts are arranged so that their mutual axes are on the same straight line, and the holding parts hold the work. At this time, a predetermined distance D is provided between both holding portions.
Take Then, at least one holding portion is brought closer to the other holding portion, and while applying a compressive pressure to the work, at least one rotating portion is rotated to rotate the work around the axis. After that, at least one holding portion is tilted with respect to the axis of the other holding portion, and the work is bent. The compression pressure has a magnitude that makes the tensile force generated on the outside of the bending zero or an antiload. In this state, the convex portion generated on the inner side of the bending is accumulated on the entire circumference of the work by the rotation of the work, and a desired color can be obtained.
When the desired color is obtained, the bending is returned and the work is straightened, then the compression pressure and the 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 toward and away from the rotating portion. The rotary frame is provided so as to be relatively movable in a direction toward and away from the rotary support shaft that is the starting end of the rotation. Then, at the time of color molding, one holding portion is brought closer to the rotary support shaft to exert a compressive pressure on the work, and the sliding frame is brought closer to the other rotary portion, whereby the rotary support shaft is rotated. The position can be located between the two holding parts. That is, since the rotation support shaft can be constantly displaced between both holding portions, it is possible to form a collar having a large diameter and a narrow width.

[0010]

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

1 to 4, the color molding apparatus 1 comprises a base 2 installed on a floor and a support column 3 provided upright.
A rectangular frame 4 is provided on the upper portion thereof in a plan view. A drive rotation unit 5 is provided at a front end portion (left side in FIG. 1) of the frame 4, and a rear end portion thereof is provided with a mounting member 7 of a sliding pressurizing means 6 described later. It should be noted that the both side frames 8, 8 of the frame 4 are provided with a groove portion 8a having a concave shape in a sectional view.

In the drive rotating portion 5, a cylindrical holding cylinder 11 is rotatably supported by a support cylinder 10 fixed to a lateral member 9 of the frame 4, and a front end portion of the holding cylinder 11 is driven. A gear 12 is attached. Further, inside the holding cylinder 11, chuck members 13, 13 for holding the work W as a holding portion are fitted. Therefore, a predetermined taper angle is provided at the rear end portion inside the holding cylinder 11 and the outer peripheral portions of the chuck members 13 and 13, and the chuck members 13 and 13 are press-fitted into the holding cylinder 11 in a state where the work W is gripped. Thus, the work W is clamped.

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

Reference numeral 16 is a sliding frame which is movable relative to the drive rotating portion in the direction of approaching and separating. The sliding frame 16 is formed in a substantially rectangular shape in a plan view, and the left and right side frames 17, 17 are provided with the frame 4 on the sides thereof.
Is provided with a convex portion that can be fitted into the groove portion 8a of the both sides, and a hole portion 18a serving as a bearing is provided in the front portion of the both side frames 17, 17.
The member 18 provided with is fixed. As the sliding pressurizing means 6 of the sliding frame 16, a reciprocating fluid cylinder 19 is mounted between the mounting member 7 and the member 18 provided at the rear end of the frame 4. In addition, the holding member 2 of the fluid cylinder 19 is provided at the rear portion of the sliding frame 16.
0 is stuck. The sliding frame 16 is configured to move back and forth as the fluid cylinder 19 expands and contracts.

A rotating frame 21 is provided on the upper surface of the sliding frame 16. The rotation frame 21 has a rotation support shaft 23 fixed to a front portion of a lower surface of a plate 22, and a pair of rail bodies 24 and 24 having a groove portion 24a fixed to an upper surface of the plate 22. Further, the rail body 2
A mounting member 28 of a fluid cylinder 27, which is a sliding pressurizing means 26 of a driven rotary portion 25, which will be described later, is attached to the rear end portions of the rollers 4, 24. The rotating frame 21 is attached to the sliding frame 16 so as to be rotatable.

A driven rotary unit 25 is mounted on the rotary frame 21 so as to face the drive rotary unit 5. The driven rotating portion 25 has substantially the same structure as the driving rotating portion 5, and the same portions are denoted by the same symbols. In addition,
The support cylinder 10 of the driven rotating portion 25 is the rotating frame 2
It is fixed to a member 29 provided with a convex portion that slides in the groove portions 24a, 24a so as to be movable back and forth along the rail bodies 24, 24 provided in 1. Further, the member 2
A fluid cylinder 27 is mounted as the sliding pressurizing means 26 between the mounting member 28 and the mounting member 28 of the rotating frame 21. Due to the expansion and contraction of the fluid cylinder 27, the driven rotating portion 25 can move back and forth with respect to the rotating frame 21.

In this embodiment, the fluid cylinder is used as the sliding pressurizing means, but any means that can move the sliding frame back and forth may be used. For example, a screw type feeding mechanism may be used. No problem.

Reference numeral 30 is a biasing means. The biasing means 30 has a driving means mounting member 31 rotatably mounted on a hole portion 20a of a holding member 20 of the sliding frame 16, and a hole portion provided on a rail body 24 of a turning frame 21. 24b
A nut member 32 is rotatably mounted on a shaft, a motor 33 is mounted as a driving means for this, a male screw 34 is mounted on the output shaft of the motor 33, and the nut member 32 is screwed into the nut member 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 with the rotating support shaft 23 as a base end.
Is configured to rotate. That is, the driven rotating portion 25 provided on the rotating frame 21 rotates.

In the drawings, the control device for the motors 14 and 33 and the fluid cylinders 19 and 27 is not shown, but the motor 33 can control the forward and reverse rotations, and the fluid cylinders 19 and 27 are each cylinders. The amount of sliding can be controlled appropriately.

As described above, in the present embodiment, the drive rotating portion 5 fixed to the front portion of the frame 4 can rotate the work W by the motor 14. further,
The driven rotary part 25 provided so as to face the drive rotary part 5 is movable relative to the drive rotary part 5 by the sliding pressurizing means 6 and 26 in a direction toward and away from the drive rotary part 5 and by the biasing means 30. It is tiltable with respect to the axis of the drive rotation unit 5, and further, when the rotation support shaft 23 approaches the drive rotation unit 5 by the slide pressure unit 6, the slide pressure unit 26.
The driven rotation part 25 can be brought close to the rotation support shaft 23 by. That is, the sliding pressurizing means 6, 2
By appropriately adjusting the sliding amount of 6, the shaft center of the rotation support shaft 23 can be relatively moved between the holding portions 13 and 13.

When using the color molding apparatus 1 in the above-described embodiment, first, the rotating parts 5 and 25 are arranged so that their mutual axes are on the same straight line. Then, the work W is inserted into the chuck members 13 and 13 which are holding portions, and the work W is held by the respective chuck members 13 and 13. Then, the motor 14 is driven to rotate the work W. Further, the sliding pressurizing means 6 and 26 are operated to apply a compressive pressure to the work W. After that, the work W is bent by the biasing means 30. The compression pressure has a magnitude that changes the tensile force generated on the outer side of bending by bending the work W to zero or an antiload. When this compression pressure is weak, the work W is repeatedly compressed and stretched, and the work W may be broken. And work W
The desired collar is formed by continuing the rotation while applying bending and compressive pressure to. If a desired collar can be molded, the biasing means 30 can be used while the compression pressure and rotation are applied.
By arranging the rotating parts 5 and 25 so that the axes thereof are on the same straight line, the work W may be rotated several times to be straightened. After that, the work W can be removed from the holding portion 13 by shortening any one of the sliding pressurizing means 6 and 26.

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 close to the drive rotation unit 5. Further, the sliding pressurizing means 2
The driven rotation part 25 is moved closer to the rotation support shaft 23 on the rotation frame 21 by 6. That is, as the rotation support shaft 23 approaches the drive rotation unit 5, the driven rotation unit 25 moves the rotation support shaft 23.
Is arranged so that the axis of the rotation support shaft 23, which is always a bending support point, is located between the holding portions 13, 13. As a result, the convex portion generated on the inner side of the bending of the work W is always generated in the vicinity of the central portion of both the holding portions 13 and 13 even when the color molding is in progress, so that the color molding can be efficiently performed.

Next, FIGS. 6 to 7 show an embodiment different from the above. In the above embodiment, the drive rotation unit 5 is fixed to the frame 4, but in this embodiment, the rotation support is provided. The bearing member 18 of the shaft 23 is fixed to the frame, the rotary frame 21 is axially attached to the bearing member 18, and
A follower rotation portion 25 is provided so as to be relatively movable on the rotation frame 21 in a direction of approaching and separating from the rotation support shaft 23, and further along the side frame 8 of the frame 4 with respect to the rotation support shaft 23.
Sliding frame 16 that can move relative to each other in the approaching and separating directions
Is provided, and the drive rotating portion is fixed on the sliding frame 16. Also in this embodiment, the axial center of the rotary support shaft 23 can be positioned between the holding portions 13 and 13 by appropriately adjusting the sliding amount of the pressure sliding means 6 and 26 as in the above embodiment. It is possible. The other parts are the same as those in the above embodiment, and the same parts are denoted by the same symbols.

Further, in the color molding apparatus according to the present invention, by making the sliding amounts of the sliding pressurizing means 6 and 26 equal to each other, the axis of the rotation supporting shaft which is always a bending fulcrum at the intermediate portion of both holding portions. Can be displaced, and molding in this state is the most efficient process.

[0025]

As described above, in the color forming apparatus according to the present invention, when the work is bent and the forming process is performed, the axis of the rotating support shaft, which is always the bending support point, is between the two holdings. It is equipped with a displacement mechanism that is positioned at the position, and the convex portion that always occurs inside the bend makes it possible to efficiently bulge the work. This makes it possible to efficiently form a large-diameter collar.

[Brief description of 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 thereof

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] Processing state explanatory diagram

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]

1 color molding machine 4 frames 5 Drive rotation part 6 Sliding pressure means 16 sliding frame 21 Rotating frame 25 Driven rotating part 26 Sliding pressure means 30 means of bias

Continuation of the front page (56) Reference JP 2000-24732 (JP, A) JP 62-45442 (JP, A) JP 2000-210748 (JP, A) JP 2000-246389 (JP, A) JP 2000-237832 (JP, A) JP 2000-301265 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21J 1/00-13/14 B21J 17/00-19 / 04 B21K 1/00-31/00 B21D 39/08 B21D 41/02 B21C 37/16

Claims (2)

(57) [Claims] 1. A drive rotating part and a driven rotating part which are opposed to each other and which are provided with a holding part for holding a metal shaft material or a metal tube which is a work, and the work rotating shaft holding the work in the holding part of the drive rotating part. Driving means for rotating the driven rotating portion, sliding pressurizing means for relatively moving the driven rotating portion toward and away from the driving rotating portion, and tilting the driven rotating portion with respect to the axis of the holding portion of the driving rotating portion. In a color forming device including a biasing means, a slider for relatively moving a shaft center of a rotary shaft, which is a starting end of rotation when the driven rotary portion is tilted by the biasing means, in a direction toward and away from a drive rotary portion. By providing a dynamic pressurizing means and adjusting the sliding amount of each sliding pressurizing means, it is arbitrary relative to the drive rotating part and the driven rotating part.
A color forming apparatus comprising a displacement mechanism that relatively moves the axis of the rotating shaft at the position . 2. A drive rotating part and a driven rotating part, which are opposed to each other, and are provided with a holding part for holding a metal shaft material or a metal pipe as a work, and the work is held in the holding part of the drive rotating part. Drive means for rotating around, biasing means for tilting one of the rotary parts with respect to the axis of the holding part of the other rotary part, and rotation for starting the rotation when biased by the biasing means In a color molding device comprising a slide pressurizing means for relatively moving both rotating parts toward and away from the axis of a support shaft , drive rotation is performed by appropriately adjusting the sliding amount of the slide pressurizing means. Section and driven rotating section
A color forming apparatus comprising a displacement mechanism that relatively moves the axis of the rotating shaft to a position relative to an arbitrary position .