JPH0699221A - Multi-stage straightening device for metal rings - Google Patents

Abstract

PURPOSE:To restrain a defect from being generated and to improve the efficiency of correction by providing diameter expanded shoes divided in plurality in the peripheral direction and having plural diameter expanded surfaces different in curvature on the outer side part, an introducing means to guide divided diameter expanded shoes in the radial direction and a diameter expanding drive means to move the diameter expanded shoes in the radial direction. CONSTITUTION:When the diameter expanding drive means 5 is operated as a metallic ring X as a corrected object is supported by the diameter expanded shoes Z, the divided diameter expanded shoes Z are guided and moved by the drive means 5 in the direction of the radius and as the diameter expanded surfaces 2a, 2b, 2c, 2d near the curvature fitted to the inner diameter of the metallic ring X are pressed to the inner peripheral surface of the metallic ring X, the diameter is expanded. When the diameter is expanded in this way, the shape of the metallic ring X is corrected after the diameter expanded surface and the diameter becomes gradually larger. The metallic ring X having an expanded diameter selects a diameter expanded surface fitted to the inner diameter, corrections are executed continuously and the out-of-roundness the metallic ring X is corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multistage straightening device for metal rings.

[0002]

2. Description of the Related Art When a metal ring made of a Ni-based alloy or the like is fed between a pair of forming rolls by isothermal rolling or cold rolling, and the metal ring is rolled and formed to a desired shape and diameter while being fed in the circumferential direction. Must be performed while maintaining the circularity of the metal ring accurately.

[0003]

However, once the roundness of the metal ring is lost during the rolling and forming, it is difficult to restore the roundness. For example, in the forming process of a metal ring by cold rolling, if the roundness is broken by 1% or more, it cannot be restored to the original state by straightening, and a defective product may be generated. In order to prevent this defective product, it is conceivable to repeatedly correct the metal ring when the roundness is slightly broken, but it is technically necessary to correct it according to the change in diameter and the degree of roundness. Difficult to do.

The present invention has been made in view of these problems, and improves the applicability in the case where the metal ring has an arbitrary inner diameter to suppress the occurrence of defects, and improves the correction efficiency of the metal ring. The purpose is.

[0005]

A multi-stage straightening device for a metal ring according to the present invention is divided into a plurality of parts in the circumferential direction and is provided on the inner peripheral surface of the metal ring on the outer side when correcting the roundness defect of the metal ring. Expanding shoes with multiple expanding surfaces to be pressed against each other with different curvatures, guiding means for guiding the expanding shoes in the split state in the radial direction, and expanding shoes arranged inside the expanding shoe in the radial direction. A configuration including a moving means for expanding the diameter is adopted.

[0006]

When the diametrical expansion drive means is operated while the metal ring to be straightened is supported by the diametrical expansion shoe, the diametrical expansion shoe in the split state is guided and moved radially outward by the guiding means to move the metal ring. The diameter expansion is performed with the diameter-expanded surface having a curvature close to the inner diameter of the metal ring pressed against the inner peripheral surface of the metal ring. At the time of these diameter expansions, the shape of the metal ring is corrected following the diameter expansion surface, and the diameter gradually increases. For the metal ring having the larger diameter, the diameter-expanded surface corresponding to the inner diameter is selected, and the straightening is continuously performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a multi-stage straightening device for metal rings according to the present invention will be described below with reference to FIGS. In each of these drawings, reference numeral X is a metal ring, 1 is a support structure, 2 is a diameter-expanding shoe, 2a, 2b, 2c, 2
d and 2e are enlarged diameter surfaces, 3 is a moving table, 4 is guiding means,
Reference numeral 5 is a drive means for expanding the diameter, and 6 is a reverse means.

The metal ring X is intended to be formed by cold rolling, for example.

The support structure 1 is a fixed bed, a vertical frame or the like which is fixed to a work floor or a building and supports the entire orthodontic device.

As shown in FIG. 2, the expanding shoe 2 has
For example, it is divided into 12 in the circumferential direction and is moved while being mounted on the moving table 3, and a plurality of radially expanded surfaces 2a, 2b, 2c having different curvatures are provided on the outer side in a substantially concentric state.
2d and 2e are formed stepwise in multiple stages. Further, the enlarged diameter surfaces 2a, 2b, 2c, 2d, 2e are appropriately formed with irregularities or the like following the shape of the inner peripheral surface of the metal ring X.

The moving table 3 is divided into, for example, 12 pieces in the circumferential direction like the expanding shoe 2 and is supported by the guiding means 4 so as to be horizontally movable along the radial direction. Cylinder 3 for pushing the diameter-expanding shoe 2 outward in the radial direction by forming an upper surface 3a for engaging with the diameter-expansion driving means 5 and an inner side wall 3b for engaging the diameter-increasing drive means 5 and an outer side surface of the inner side wall 3b. And a surface 3c.

As shown in FIGS. 1 and 2, the guiding means 4 has a dovetail groove 1a formed on the upper surface of the support structure 1 in the radial direction and a lower surface of the moving table 3 in the radial direction. It has a sliding protrusion 3d that is slidably engaged with the groove 1a.

The diametrical expansion driving means 5 has a hydraulic cylinder 5a arranged downward on the support structure 1, and a taper rod 5b vertically moved by the hydraulic cylinder 5a.
And a tapered inner surface 3e formed on the inner side surface of the inner side wall 3b of the moving table 3 that is brought into contact with the outer peripheral surface of the tapered rod 5b.

The reverse means 6 is a pressure oil generation source 6a.
And a hydraulic cylinder 6b to which pressure oil is supplied from the pressure oil generation source 6a and which is mounted on the support structure 1 while being connected to the outer side portion of the moving table 3.

The hydraulic cylinders 6b of the same type are set so that the supporting structures 1 are mounted on the respective moving tables 3 in a connected state, and the moving tables 3 are returned to the central direction.

When the metal ring X is straightened by the multi-stage straightening device for a metal ring constructed as described above, the taper rod 5b in the diameter enlarging drive means 5 is made to stand by upward and the reverse means 6 is operated. The moving table 3 is moved inwardly by means of the above to bring the plurality of diameter-expanding shoes 2 into a reduced state, and the diameter-increasing surfaces 2a, 2b, 2c, 2d, 2 having a curvature corresponding to the inner diameter of the metal ring X to be corrected.
e, select these expanded surfaces 2a, 2b, 2c, 2d,
As shown in one of 2e, for example, FIG. 1 and FIG. 2, the metal ring X is engaged with and supported by the enlarged diameter surface 2a in an externally fitted state.

When the taper rod 5b is lowered by the operation of the diameter-expansion drive means 5 while the metal ring X to be corrected is supported by the diameter-expansion shoe 2, the tapered inner surface 3e of the divided state is radiused by the taper rod 5b. When pushed outward, the plurality of moving tables 3 move while being guided radially outward by the guiding means 4. Therefore, the diameter-expanding shoe 2 is pushed out together with the inner side wall 3b, the diameter-expanding surface 2a is brought into pressure contact with the inner peripheral surface of the metal ring X, and the diameter of the metal ring X is expanded.

At the time of expanding these diameters, the shape of the metal ring X is corrected in accordance with the expanded diameter surface 2a, and the diameter of the metal ring X is gradually increased.

When the reverse means 6 is operated,
Pressure oil is sent from the pressure oil generation source 6a to the hydraulic cylinder 6b, the hydraulic cylinder 6b moves the moving table 3 toward the center, and the expanding force of the metal ring X by the reducing shoe 3 is released.

When the correction portion of the metal ring X is displaced, the metal ring X is displaced in the circumferential direction by a desired angle,
The contact point with the diameter-expanded surface 2a, 2b, 2c, 2d, 2e is changed, and subsequently, the corrected position is corrected.

Subsequently, when the metal ring X removed from the diameter-expanding shoe 2 is rolled and formed, and a phenomenon occurs in which the roundness is impaired, the diameter-increased surface having a curvature corresponding to the inner diameter at that time. 2a, 2b, 2c, 2d, 2e are selected, for example, as shown in (a) to (c) of FIG.
As the inner diameter of the metal ring X increases, the diameter expansion surfaces 2b, 2
The correction is performed while sequentially selecting c and 2d.

[Other Embodiments] In the present invention, the following techniques can be adopted instead of the embodiments. In order to suppress the relative movement of the diameter-expanding shoe 2 and the moving table 3 in the circumferential direction, appropriate anti-slip means such as engagement between a pin and a hole should be provided. The number of divisions of the diameter-expanding shoe 2 and the moving table 3 should be arbitrary numbers other than those shown in the figure. The number and length of the dovetail grooves 1a are arbitrary. The diameter expanding drive means 5 and the reverse means 6 are constituted by drive sources other than the hydraulic cylinder.

[0023]

According to the multi-stage straightening device for a metal ring according to the present invention, a diameter-expanding shoe having a plurality of diameter-expanding surfaces with different curvatures formed on the outer side in the circumferential direction and a diameter-expanding shoe in the divided state. Since a configuration including guide means for guiding the radial expansion shoe and radial expansion drive means for moving the radial expansion shoe in the radial direction is adopted, the following effects are achieved. (1) If the circularity is lost due to metal roll forming, the circularity of the metal ring is quickly corrected by expanding the diameter of the metal ring with a diameter-expanding shoe to prevent defective products. Can be suppressed. (2) The accuracy of the roundness can be improved by selecting an expanded surface having a curvature close to the inner diameter of the metal ring. (3) Even if the diameter of the metal ring increases with the progress of rolling and forming, the straightening efficiency of the metal ring can be improved by selecting from a plurality of diameter-expanded surfaces to deal with the diameter. .

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing an embodiment of a multi-stage straightening device for metal rings according to the present invention.

FIG. 2 is a plan view showing an embodiment of a multi-stage straightening device for a metal ring according to the present invention.

FIG. 3 is a model diagram showing a state of implementation of a correction work using the diameter-expanding shoe shown in FIG.

[Explanation of symbols]

 X Metal ring 1 Support structure 1a Dovetail groove 2 Expanding shoe 2a, 2b, 2c, 2d, 2e Expanding surface 3 Moving table 3a Upper surface 3b Inner side wall 3c Cylindrical surface 3d Sliding ridge 3e Taper inner surface 4 Guide means 5 Expanding Diameter drive means 5a Hydraulic cylinder 5b Tapered rod 6 Reverse means 6a Pressure oil generation source 6b Hydraulic cylinder

Claims (1)

[Claims] 1. A device for correcting defective circularity of a metal ring, wherein a plurality of radially expanded surfaces, which are divided into a plurality of pieces in the circumferential direction and are brought into pressure contact with the inner peripheral surface of the metal ring, are formed on the outer side portion with different curvatures. A diameter expanding shoe, a guiding means for guiding the diameter expanding shoe in the radial direction in a radial direction, and a diameter expanding drive means arranged inside the diameter expanding shoe for moving the diameter expanding shoe in the radial direction. A multi-stage straightening device for metal rings.