JPH085126B2 - Molding equipment - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a molding apparatus that presses a molding plate against a tubular molding target to subject the molding target to plastic deformation.

[Background of the Invention]

There is a device called a bellows molding device for molding a bellows into a cylinder, which is a tubular molding target, by a pressing die, which is a molding plate.

As shown in FIG. 7, a conventional bellows forming apparatus is configured such that a shaft 1 having a forming roll 2 attached thereto is passed through a cylinder 6 and a forming plate 4 rotatably supported by a holder 5 is pressed against the outer peripheral surface of the cylinder 6. 7 parts are molded.

According to such a conventional example, when the molding plate 4 is pressed against the cylinder 6, the thin cylinder 6 becomes the shaft 1 as shown in FIG.
It is difficult to maintain holding parallel to the central axis 8 of. Therefore, with respect to the central axis 8 of the shaft 1, the central axis 9 of the cylinder 6
Is difficult to hold in parallel.

Therefore, as shown in FIG. 8, the bellows angle 10 of the bellows 7 with respect to the central axis 9 of the thin cylinder 6 is not a right angle. Therefore, there was a drawback that the bellows angle of 10 was right and the molding could not be performed with high precision.

[Object of the Invention]

An object of the present invention is to provide a molding device with good processing accuracy.

[Outline of Invention]

In order to achieve the above object, the present invention provides a shaft that is long in the axial direction and rotatable about its central axis, and that is provided on the outer periphery of the shaft and abuts on a tubular molded object from the inside, together with the shaft. Rotatable first molding means, first gripping means for gripping the body to be molded from both sides in the horizontal direction perpendicular to the axial direction, and a predetermined distance from the first gripping means in the axial direction Second gripping means provided for holding the molded body from both sides in the horizontal direction, and a central axis parallel to the central axis of the shaft that abuts the outer periphery of the molded body from one side in the horizontal direction. A second molding means rotatable around, a driving means for moving the second molding means in the horizontal direction, and a movement of the second molding means,
Support means for supporting the first and second gripping means so as to move in the horizontal direction.

According to the present invention, the first and second gripping means move in the horizontal direction in conjunction with the movement of the second molding means, so that the center axis of the molding target is maintained during the molding process of the molding target. Although it deviates in the horizontal direction with respect to the central axis of the shaft, the parallel positional relationship is maintained, so that molding can be performed while gripping the molded body in an accurate posture. Therefore, the precision of the molded product can be improved.

Example of Invention

A specific embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

As shown in Fig. 1, the base frame 21 has a bearing box 22
Is installed. Shaft 1 supported horizontally by bearing box 22
As shown in FIG. 2, the forming roller 2 is attached to the same as in the conventional case. Before the molding process, the cylinder 6 having a cylindrical cross section, which is a molded body through which the shaft 1 is passed, is concentric with the shaft 1 by a plurality of rollers 18 constituting a gripping mechanism as shown in FIG. Is gripped by. This gripping mechanism is as follows.

That is, as shown in FIG. 3, in the roller receiver 17 divided into two, a plurality of rollers 18 are arranged along the outer peripheral surface of the thin cylinder 6 and rotated so that the roller surface can be provided as the receiving surface of the cylinder 6. It is freely pivoted. Piston rod part 14a of a piston / cylinder device 14 which is attached to the support 13 in a direction orthogonal to the shaft 1 in a direction of operation.
Is connected to the roller receiver 17.

The support 13 of the gripping mechanism is installed on the moving support mechanism. The moving support mechanism is as follows. The moving support mechanism is
In the case of the present embodiment, in the roller table 12, the support 13 is installed on the upper table 12a of the roller table 12, and the lower table 12b is installed on the saddle 11. And
The saddle 11 is installed on the frame 21. Between the saddle 11 and the support 13, there is provided a returning device which is a part of a moving support mechanism. The return device is as follows.

That is, as shown in FIG. 4, the spring bearing 16 provided so as to project downward at the central portion of the lower surface of the support 13 and the shaft 1 to the saddle 11.
Other spring bearings 16a, 16b are provided as a spring bearing, the spring bearings 16a, 16b having an interval in the direction orthogonal to and protruding upward. A coil spring 19a is provided between the spring bearing 16 and the spring bearing 16a.
A coil spring 19b is horizontally installed between the 16 and the spring receiver 16b. A column 25 is installed on the saddle 11 as shown in FIG. 4, and a piston / cylinder device 26 is installed on the column 25 with the extension / contraction direction oriented horizontally. The piston rod 26a of the piston / cylinder device 26 is a holder 5 as shown in FIG.
Attached to. The molded plate 4 is rotatably attached to the holder 5 as in the conventional case.

In this embodiment, in order to form the bellows on the cylinder 6, the piston rod portion of the piston / cylinder device 14 is processed.
14a is contracted and the roller receiver 17 is opened left and right as shown in FIG. In this state, place the cylinder 6 on the shaft 1 as shown in FIG.
Set around the shaft 1 so that it passes inside. Next, the piston rod part 14 of the piston / cylinder device 14
The cylinder 6 is sandwiched by the roller receiver 17 by applying a stretching action to a, and the surface of the roller 18 is applied to the outer peripheral surface of the cylinder 6. In this state, the molding plate 4 is set to the position shown in FIG. 2 so as not to interfere with the setting of the cylinder 6 around the shaft 1, and in this state, the shaft core 8 of the shaft 1 and the thin-walled cylinder are set. The central axis 9 of 6 coincides.

Next, the piston rod portion 26a of the piston / cylinder device 26 is caused to extend so that the molding plate 4 is held by the holder 5.
And extrude it to the molding roller 2 side. Then, the molding plate 4 contacts the outer peripheral surface of the set cylinder 6, and the thin cylinder 6 is pressed to the left side in FIG. By this pressing force, the entire mechanism supported by the roller table 12 moves to the left, and the state shown in FIG. 5 is obtained. In this state, since the cylinder 6 is still held by the plurality of rollers 18 of the roller receiver 17,
Although the axis 9 of the cylinder 6 is displaced in the horizontal direction, the parallel positional relationship between the axis of the shaft 1 and the axes of the axis 9 of the cylinder is maintained accurately without being broken. Then, the bellows-processed portion of the cylinder 6 is sandwiched between the forming roller 2 and the forming plate 4 under such a parallel positional relationship shown in FIG. In the state shown in FIG. 5, the coil spring 19a is compressed and the coil spring 19b is extended, and the force for returning the support 13 to the original position shown in FIG. 4 is stored.

Thereafter, the molding plate 4 is further pressed by the piston / cylinder device 26 against the cylinder 6 to obtain an appropriate molding processing force, and the shaft 1 is rotated to start the bellows molding of the cylinder 6. In this case, since the forming roll 2 integrated with the shaft 1 also rotates, the cylinder 6 in contact with the inner peripheral surface of the forming roll 2 is also sandwiched by the forming plate 4 and smoothly rotates, and the bellows is formed along the outer periphery. It Even during this molding, the cylinder 6 is securely held by the roller receiver 17, so that the cylinder 6 rotates while maintaining the parallel positional relationship between the shafts 1 and the cylinders 6 and the axes 8 and 9. Therefore, the angle 10 of the molded bellows is almost exactly orthogonal to the axis 9 of the cylinder 6 in FIG. Therefore, the quality of the bellows molded product is extremely high.

After the bellows forming process in FIG. 5, the forming plate 4 is held in the holder 5 by contracting the piston / cylinder device 26.
And move the shaft away from the shaft 1. By doing so, the support 13 is automatically returned to the original position by the force accumulated in the coil springs 19a and 19b, and the state shown in FIG. 7 is obtained. Therefore, the cylinder 6 separates from both the forming plate 4 and the forming roll 2 and returns to the original position. After that, the thin cylinder 6 after molding is taken out as a molded product by a procedure reverse to the procedure of setting the cylinder 6 around the shaft 1.

When the bellows are to be molded into a portion having a positional relationship in which the bellows are close to each other, the cylinder 6 shown in FIG. 1 is returned to the state of FIG. 4 in the axial direction, and then the cylinder 6 is slid. Then, a new molding portion is positioned between the molding roll 2 and the molding plate 4, and the molding process is repeated in the same manner as described above.
When the cylinder 6 is slid, the piston / cylinder device 14 shown in FIGS. 2 and 4 is used to loosen the abutting force of the roller 18 on the cylinder 6, and then the sliding operation is performed.

〔The invention's effect〕

As described above, according to the present invention, it is possible to perform molding while gripping the molded body in an accurate posture,
The precision of the molded product can be improved.

[Brief description of drawings]

1 is a front view of a cylindrical molding apparatus, FIG. 2 is a plan view of a cylindrical molding apparatus, FIG. 3 is a sectional view taken along line AA of FIG. 1, and FIG.
1 is a sectional view taken along the line BB of FIG. 1, FIG. 5 is a sectional view taken along the line BB of FIG. 1 when a forming force is applied to the cylinder, and FIG. 6 is FIG. 1 when the cylinder is removed. 7 is a sectional view of the conventional roll type bellows forming apparatus, and FIG. 8 is an explanatory view of the angle of the bellows. 1 ... Shaft, 2 ... Forming roll, 4 ... Forming plate, 5
…… Holder, 6 …… Cylinder, 7 …… Bellows, 8 …… Shaft center axis, 9 …… Cylinder center axis, 10 …… Bellows angle, 11 …… Saddle, 12 …… Roller table, 12 a
...... Upper table, 12b ...... Lower table, 13 ...... Support, 14 ...... Piston / cylinder device, 14a ...... Piston rod part, 16 ...... Spring bearing, 16a ...... Spring bearing, 16b ...
… Spring holder, 17 …… Roller holder, 18 …… Roller, 19
...... Coil spring, 21 …… Frame, 22 …… Bearing box, 25…
… Column, 26 …… Piston / cylinder device, 26a ……
Piston rod part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Sugawara 3-1, 1-1 Saiwaicho, Hitachi, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Seiichi Komatsu 3-Sachimachi, Hitachi, Ibaraki 1-1 No. 1 Hitachi Ltd. Hitachi factory (72) Inventor Minji Hamashima 2-9-1 Aise-cho, Hitachi City, Ibaraki Hitachi Equipment Engineering Co., Ltd.

Claims (3)

[Claims] 1. A shaft which is long in the axial direction and is rotatable around its central axis, and a first molding which is provided on the outer periphery of the shaft and abuts against a tubular molding target from the inside and is rotatable with the shaft. Means, first gripping means for gripping the body to be molded from both sides in a horizontal direction perpendicular to the axial direction, and a predetermined distance in the axial direction from the first gripping means. Second gripping means for gripping a body from both sides in the horizontal direction, and contacting the outer periphery of the molded body from one side in the horizontal direction,
Second molding means rotatable about a central axis parallel to the central axis of the shaft, driving means for moving the second molding means in the horizontal direction, and interlocked with movement of the second molding means. And a supporting means for supporting the first and second gripping means so as to move in the horizontal direction. 2. The method according to claim 1, wherein
The second gripping means is provided with a plurality of rollers capable of rotating around a central axis parallel to the central axis of the shaft, in a portion for gripping the molded body. 3. The support means according to claim 1, wherein the supporting means includes elastic means for acting to return the supporting means in a direction opposite to a moving direction of the supporting means in the horizontal direction. Molding equipment.