JP3583360B2 - Metal processing machinery - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an oscillation mechanism of a metal working machine including a micro finishing machine using a micro finishing film as a tool for finishing an outer surface or an inner surface of a tubular body such as a steel pipe or an automobile part with high accuracy.
[0002]
[Prior art]
As a metal working machine including such a micro finishing machine, for example, as disclosed in Japanese Patent Publication No. 5-9225, there is disclosed a metal working machine which passes a micro finishing film, which is a polishing tool, against an outer surface or an inner surface of a work by passing the film. ing. In such a film wrapping process, a so-called oscillation motion for causing the film and the workpiece to vibrate relatively in the axial direction is performed to perform a precision processing such as a surface roughness of a workpiece processing surface. In order to obtain this oscillation motion, for example, a disk is attached to one end of either a processing tool for pressing a film or a spindle for clamping a work. Further, an eccentric cam is provided for slidingly rotating on the disk surface of the disk, and the disk is urged to the eccentric cam using a spring or the like. Thus, by rotating the eccentric cam, the disk is vibrated in the axial direction, and an oscillation motion is given to the machining tool or the main shaft.
[0003]
[Problems to be solved by the invention]
However, in order to rotate and oscillate the conventional eccentric cam, a driving device for rotating the eccentric cam is separately required, and there is a problem that the space and the structure are complicated. When using an eccentric cam, the amount of eccentricity of the cam is the amount of oscillation.Therefore, changing the amount of oscillation requires changing the eccentric cam every time by changing the work, which requires time. did. There is also a problem that various eccentric cams need to be prepared and stored. In addition, there is a problem that the amount of eccentricity cannot be changed during processing. In view of the above problems, the problem of the present invention is to reduce the number of driving devices with a simple structure, to easily change the amount of oscillation, and to change the amount of oscillation even during machining, or to change continuously. It is to provide a metal working machine including a possible micro finishing machine.
[0004]
[Means for Solving the Problems]
In the present invention, in a metal working machine including a micro finishing machine using a micro finishing film which is a tool for finishing an outer surface or an inner surface of a tubular body such as a steel pipe or an automobile part with high accuracy, the main body is supported by a shaft. A main shaft rotatably rotatable in the axial direction while holding the workpiece, a face cam provided at one end of the main shaft, an urging means for urging the main shaft to one end side, and a cam surface of the face cam. The object has been achieved by providing a metal working machine including a micro finishing machine having a roller that rotates in contact and a support that fixes the roller to the main body.
[0005]
That is, a face cam having a cam surface on a disk-shaped disc surface is provided on the main shaft, and the main shaft is urged to the roller via the face cam by urging means such as a spring, and the roller supported by the main body is moved to the face cam surface. Since the sliding contact is made above, the distance between the face cam and the roller changes only by rotating the main shaft, and the main shaft receives an axial force to perform an oscillating motion. Therefore, no driving device is required on the roller side.
[0006]
Further, the lift amount of the face cam is continuously increased from the center in the radial direction, and the support portion enables the roller to move in the direction perpendicular to the axis between the center side of the main shaft and the radial direction. Is good. When the cam surface of the face cam is constant in the radial direction, the lift amount does not change depending on the position of the roller on the face cam, but by changing the lift amount of the face cam in the radial direction, the face cam and the roller are changed. The lift amount can be changed depending on the sliding contact position with. Since the lift amount of the face cam is continuously increased in the radial direction from the center so that the position of the roller can be moved, an arbitrary lift amount can be obtained.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described. FIG. 1 is a front view of a main part of an oscillation mechanism of a micro finishing machine using a micro finishing film according to an embodiment of the present invention, and FIG. 2 is a side view of FIG. . The work 1 is rotatable on a headstock 11 mounted on a microfinishing machine main body 10 and is rotatable on a head center 2 mounted on a main shaft 4 supported by a bearing or the like (not shown) and a tailstock (not shown) so as to be movable in an axial direction. The center ring is formed by the tail center 3 supported by the center. At one end (left side in the figure) of the main shaft 4, a face cam 5 having a disc-shaped disc surface and an uneven cam surface 5a formed thereon is attached. On the other hand, a roller 6 that slides and rotates on a cam surface 5 a of the face cam 5 is fixed to the main body 10 via a support portion 12.
[0008]
Since the tail center 3 presses the work 1 to the left by a spring (not shown), the work and the spindle 4 are sandwiched between the tail center and the roller 6. Therefore, the cam surface 5a of the face cam 5 is always in contact with the roller 6. As shown in FIG. 2, the cam surface 5a of the face cam 5 has a shape in which the lift amount continuously increases in the radius (radiation) direction. Further, the roller 6 can be moved by the support portion 12 from the center 4a of the main shaft as shown in FIG. 2 to at least the outer surface 5b of the cam surface of the face cam. A pulley 7 is provided on the opposite side of the face cam surface 5a of the main shaft 4, and the pulley 7 is attached to a shaft of a motor 13 via a belt 9 and connected to the pulley 8, so that the main shaft 4 can be rotated by the motor 13. ing.
[0009]
According to such a configuration, the rotation of the motor 13 rotates the main shaft 4 via the pulley 8, the belt 9, and the pulley 7, and the work 1 is processed. At the same time, the face cam 5 also rotates, receives a reaction force from the roller 6 by the cam surface 5a, moves the main shaft in the axial direction according to the lift amount of the cam surface, and allows the workpiece to perform an oscillating motion. Only with this, the rotational motion and the oscillation motion of the main shaft can be performed simultaneously.
[0010]
Further, when the mounting position of the roller 6 in the radial direction is changed by the support portion 12, the sliding contact position between the face cam surface 5a and the roller is changed, so that the lift amount can be changed, so that the oscillation amount of the work 1 is changed. be able to. Further, by providing a driving device capable of automatically moving the roller 6 in the radial direction in the support portion 12 and moving the roller left and right, the oscillation amount can be continuously changed during the work processing.
[0011]
【The invention's effect】
In the present invention, the face cam is provided on the main shaft, the face cam is urged against the roller, the roller is slid on the face cam surface, and the main shaft is rotated and oscillated by simply rotating the main shaft. As a result, a driving device for oscillation is not required, the structure is simple, and the cost of the device can be greatly reduced.
[0012]
In addition, the face cam surface of the face cam has a shape that continuously changes the lift amount in the radius (radiation) direction, and the rollers in contact with the face cam surface can be easily moved. Since the lift amount can be selected, the oscillation amount (lift amount) can be easily changed, and the type of cam can be reduced. Further, by continuously moving the roller during the work processing, the amount of oscillation can be changed, and further, can be changed continuously. Therefore, it is possible to create cross hatch surfaces having various sizes on the surface of the workpiece to be processed. Further, it has become possible to finish the work surface with higher precision and efficiency.
[Brief description of the drawings]
FIG. 1 is a front view of a main part of an oscillation mechanism of a micro finishing machine using a micro finishing film according to an embodiment of the present invention, with a part thereof being cut away.
FIG. 2 is a side view of FIG. 1 with a part cut away.
[Explanation of symbols]
Reference Signs List 1 Work 2 Head center 3 Tail center 4 Main shaft 4a Main shaft center 5 Face cam 5a Cam surface 5b Outer surface of cam surface 6 Roller 7, 8 Pulley 9 Belt 10 Main body 11 Tail stock 12 Support section 13 Motor

Claims (2)

Metal processing machines, including micro finishing machines using micro finishing films, which are tools for finishing the outer surface or inner surface of cylindrical bodies such as steel pipes and automobile parts with high precision, are supported by the main body to clamp the work. A main shaft that rotates while being axially movable, a face cam provided at one end of the main shaft, an urging unit that urges the main shaft to one end side, and a roller that slides and rotates with a cam surface of the face cam. And a support for fixing the roller to the main body. A metal working machine including a micro finishing machine. The lift amount of the face cam is continuously increased in the radial direction from the center, and the support portion is capable of moving the roller in a direction perpendicular to the axis between the center side of the main shaft and the radial direction. A metal working machine comprising the micro finishing machine according to claim 1.

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