JPH05277609A - Ring rolling machine - Google Patents

Abstract

PURPOSE:To reduce the time and expenditure for setting up following to the re-adjusting and changing of the forming roll. CONSTITUTION:A forming roll 2 is composed of a driving roller 2a attached to a rotary driving shaft 6, a forming roller 2b providing a forming part 2bl on the external circumference and an intermediate roller 2c interposing between the driving roller 2a and the forming roller 2b. And these three rollers 2a, 2b, 2c are attached to a moving frame 7 freely movable to the orthogonal direction against the axial line of a mandrel 3. Axial lines of three rollers 2a, 2b, 2c are all laid within the same horizontal. plane including the axial line of the mandrel 3, and the intermediate roller 2c is press-contacted to both of the external circumferential surface of the driving roller 2a and the external circumferential surface of the forming roller 2b. And the moving frame 7 is connected to the driving means, and three rollers 2a, 2b, 2c are moved with advancing and retreating to the orthogonal direction against the axial line of the mandrel 3 by being made as one body following to the movement of the moving frame 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring rolling machine for forming a ring-shaped work such as a bearing inner ring into a predetermined size by rolling.

[0002]

2. Description of the Related Art As shown in FIG. 2, a ring rolling machine generally holds a ring-shaped work 22 between the mandrel 21 and a forming portion 23a of a forming roll 23 from the inner and outer diameter directions to rotate the work. By pressing the forming roll 23 against the mandrel 21, the work 22 is rolled while being pressed and rotated. Mandrel 21
Is movable in the axial direction, and when the work 22 is supplied to a predetermined position, the mandrel 21 advances and is inserted into the inner diameter portion of the work 22. A support roller 25, which is driven to rotate, is arranged on the side of the mandrel 21.
1 is supported from the side. Forming roll 2
The mandrel 2 is arranged to face the support roller 25.
It is driven back and forth in the direction perpendicular to the axis of 1. Work 2
When 2 is inserted into the mandrel 21, the forming roll 23 moves to the mandrel 21 side and presses the work 22.

[0003]

By the way, the forming portion 23a of the forming roll 23 is abraded by repeated rolling. Therefore, when the processing is repeated to some extent, the forming roll 23 is removed, and the surface of the forming portion 23a is ground or the like to be readjusted. Further, when the type of work is changed, the forming roll 23 is replaced with one that matches the work. However, the forming roll is connected to a rotation source, etc., and its removal, readjustment,
A series of work such as installation after readjustment is very troublesome. Further, the forming roll is discarded when readjustment of the forming part becomes impossible due to long-term use, but the forming roll itself is expensive, and its cost loss is large. It is pointed out that such inconvenience becomes more remarkable as the diameter of the forming roll becomes larger, and the cost increases due to an increase in setup time and an increase in replacement cost.

Therefore, an object of the present invention is to reduce the setup time and cost associated with readjustment / replacement of forming rolls.

[0005]

SUMMARY OF THE INVENTION A ring rolling machine of the present invention comprises a mandrel and a forming section of a forming roll which is movable in a direction perpendicular to the axis of the mandrel so as to form a ring-shaped work on the inside and outside diameters. In a ring rolling machine that presses a mandrel that presses and rotates a molding roll that is nipped from the direction and rotated, in a ring rolling machine that presses and rotates a work, the molding roll is a molding roller that has a molding section on the outer circumference. It is characterized in that it is configured by a drive roller that is rotationally driven by a drive source, and an intermediate roller that is interposed between the forming roller and the drive roller and that transmits the rotational power of the drive roller to the forming roller.

[0006]

The readjustment / replacement of the forming roll may be performed only on the forming roller or the forming roller and the intermediate roller.

[0007]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 is a plan view (FIG. 1A) and a side view (FIG. 2B) showing a main part of a ring rolling machine according to this embodiment. This ring rolling machine has a ring-shaped work, such as a bearing inner ring 1, a forming roll 2 and a mandrel 3.
By pressing the forming roll 2 which is sandwiched between the bearings 1 and 2 and rotatably driven against the mandrel 3, rolling is performed while the bearing inner ring 1 is pressed and rotated.

The mandrel 3 is axially driven back and forth by a driving means (not shown), and is retracted when it is not machined. However, when the bearing inner ring 1 is supplied to a predetermined position, the mandrel 3 is advanced to the inner diameter of the bearing inner ring 1. Is inserted into the section. When the mandrel 3 is inserted into the bearing inner ring 1, the pair of edge rolls 5 swing to position the bearing inner ring 1 in the width direction.

The forming roll 2 is composed of a drive roller 2a mounted on a rotary drive shaft 6, a forming roller 2b having a forming portion 2b1 on its outer periphery, and an intermediate roller 2c interposed between the drive roller 2a and the forming roller 2b. To be done. And these 3
The two rollers 2a, 2b, 2c are rotatably mounted on a movable frame 7 which is movable in a direction perpendicular to the axis of the mandrel 3. The axes of the three rollers 2a, 2b, 2c are all in the same horizontal plane including the axis of the mandrel 3, and the intermediate roller 2c is the outer peripheral surface of the drive roller 2a and the forming roller 2a.
It is pressed against both outer peripheral surfaces of b. Further, the movable frame 7 is connected to a driving means (not shown), and as the movable frame 7 moves, the three rollers 2a, 2b, 2c integrally move forward and backward in a direction perpendicular to the axis of the mandrel 3. To do.
When the rotary drive shaft 6 is rotationally driven by a rotating means (not shown), the drive roller 2a rotates. This rotational power is transmitted to the forming roller 2b via the intermediate roller 2c, and the forming roller 2b rotates.

When the bearing inner ring 1 is supplied to the mandrel 3 and further positioned by the edge roll 5, the forming roll 2 moves forward while rotating to the mandrel 3 side.
The three rollers 2a, 2b, 2c integrally move forward. When the forming roll 2 moves a predetermined distance, the forming roller 2b contacts the outer periphery of the bearing inner ring 1, and the bearing inner ring 1 is sandwiched between the forming portion 2b1 of the forming roller 2b and the mandrel 3 from the inner / outer radial direction. In this state, the forward movement of the forming roll 2 is switched to the feeding movement, and the forming roll 2 is fed to the mandrel 3 side at a predetermined feeding speed. Then, the bearing inner ring 1 is gradually rolled and formed into a predetermined size and shape while being pressurized and rotated.

By repeating the rolling process, the forming part 2b1 is formed.
If abrasion occurs, the forming roller 2b alone should be removed from the movable frame 7 and the forming portion 2b1 should be readjusted. If readjustment is not possible, it should be discarded. Since the removing / attaching work of the forming roller 2b is extremely easy, the setup time is greatly shortened as compared with the conventional case. Further, even when the waste is discarded, the forming roller 2b is not so large, so that the cost loss can be minimized. Further, when the type of the bearing inner ring 1 changes and it is necessary to use the forming rollers 2b having different diameters, the adjustment can be performed by replacing the intermediate roller 2c while leaving the driving roller 2a as it is. For example, when the diameter of the forming roller 2b is increased, the diameter of the intermediate roller 2c is reduced accordingly. As described above, if various sets of the forming roller 2b and the intermediate roller 2c are prepared according to the type of work, it is possible to deal with various works simply by exchanging these sets.

[0013]

As described above, according to the present invention,
The drive roll, forming roller, and intermediate roller are combined to form the forming roll, so the work time for re-adjusting and replacing the forming roll can be greatly shortened compared to the past, and replacement is also possible. The cost can be kept to a minimum.

[Brief description of drawings]

FIG. 1 is a plan view (FIG. A) and a side view (FIG. B) showing an embodiment of the present invention.

FIG. 2 is a plan view (FIG. A) and a side view (FIG. B) showing a conventional example.

[Explanation of symbols]

 1 Bearing Inner Ring (Work) 2 Forming Roll 2a Drive Roller 2b Forming Roller 2b1 Forming Part 2c Intermediate Roller 3 Mandrel

Claims (1)

[Claims] 1. A mandrel for manipulating a ring-shaped work by a mandrel and a forming part of the forming roll movable in a direction perpendicular to the axis of the mandrel, the ring-shaped work being rotatably driven. In a ring rolling machine that performs rolling while pressing and rotating the work piece by pressing, the forming roll, a forming roller having a forming portion on the outer periphery, and a drive roller that is rotationally driven by a drive source, A ring rolling machine characterized by comprising an intermediate roller which is interposed between a forming roller and a drive roller and which transmits the rotational power of the drive roller to the forming roller.