JPS58186558A - Method and equipment for processing pipe - Google Patents

Abstract

PURPOSE:To heighten the efficiency of processing, by causing a pipe to both rotate and revolve so that the centrifugal acceleration is much higher than the gravitational acceleration. CONSTITUTION:Rotary frames 4, 5 loosely fitted on a revolving shaft 2 are coupled to each other by clamping members 6. Cylinders 8, in which a mixture 7 of workpieces and a polishing agent are sealed up, and the clamping members 6 are placed in equiangular positions at prescribed radii of revolution around the shaft 2 and balanced so that the center of gravity as a whole is on the shaft. Driving power is transmitted from a prime mover through a pulley 12 secured on the rotary frame 4. A difference is set between the revolution speed of the rotary frame 4 and that of the shaft 2 by gear engagement so that the cylinders 8 are rotates as well. As a result, a centrifugal acceleration several times greater than the acceleration of gravity is caused to enhance the efficiency of processing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a so-called piping process and an apparatus therefor.

Piping processing involves sealing, for example, a disc-shaped crystal AT plate material and an abrasive material inside an iron pipe, and rolling it around its central axis for a long time so that the crystal disc conforms to the curvature of the inner surface of the pipe. This is a method in which the material is processed into a pie convex shape. It is said that mass production is extremely effective because many pieces can be processed simultaneously. At this time, the polishing pressure using the inner surface of the pipe as a polishing disk is only the weight of the crystal plate and the abrasive material, so for example, an ultra-small thickness sliding AT plate vibrator (6 to 4 mm thick) that can be applied to a wristwatch is used. If you try to make it by this method, if the weight of the material is extremely small and the curvature is strong, the pipe diameter will also be small (as a result, the abrasive will not be superimposed sufficiently, and the efficiency of the polishing shop will be extremely low. No matter how long you spend, you can't get anything good.

The present invention has been made to compensate for this drawback by giving orbital motion to the pipe, which conventionally rotated only on its own axis, and making the resulting centrifugal acceleration sufficiently larger than the vehicle acceleration to obtain high polishing pressure and improve machining efficiency. It is intended to raise the This will be explained below with reference to the drawings.

FIG. 1 is a sectional view showing the structure of a processing device that is an embodiment of the present invention. 1 is a base frame, and has a bearing part 6 that supports the revolution axis 2. A rotating frame 4.5 is loosely engaged with the revolution axis 2. The rotating frame 4.5 is integrally connected by a fastener 6, which can be separated for loading and unloading the contents of the cylinder 8.

It also has bearings 10 and 11 that support a central shaft 9 of a cylinder 8 in which a mixture 7 of processing material and abrasive is enclosed. A plurality of fastening members 6 or cylinders 8 are arranged at equal angular intervals (rotationally symmetrical) around the axis 2 at positions with predetermined revolution radii, and the whole is balanced so that the animal center is above the axis 2. It is located in

In order to make the cylinder rotate on its own and revolve around itself, first, the pulley 12 fixed to the rotating frame 4 is driven by a prime mover fixed to the base frame and a belt (not shown) to give it a revolution movement. The rotation of the frame 4 is caused by driving the shaft 2 through a gear 16 fixed thereto, gears 15 and 16 fixed to each other having a fixed rotating shaft 14 on the base frame 1, and a gear 17 fixed to the shaft 2. Another gear 18 fixed to this drives the southeast 19 fixed to the cylindrical shaft 9, but the rotational speed of the rotating frame 4 and the shaft 2 is controlled by the difference in the gear ratio of the gear pairs 16 and 15, 16 and 17. A difference is made,
The relative speed of the two drives the gear pair 18, 19, producing rotational movement of the shaft 9 and cylinder 8. This structure is good for giving all cylinders exactly equal rotation.

An example of a structure that generates rotation and revolution using one power source has been shown above, but in general, various methods for providing rotation and revolution can be considered. In the present invention, the centrifugal acceleration associated with the revolution at the part of the inner surface of the cylinder where the distance from the revolution axis is maximum plays the role of the single-force acceleration in conventional piping processing.
-, so let's estimate its worth.

The vehicle force acceleration is g = 980 cIn/5ec2, the radius from the shaft 2 at the outermost end of the inner surface of the cylinder 8 is kr = 50cTL,
If the rotational speed of the frame 4 is f = 2 rev / sec, then the maximum centrifugal acceleration α that the cylinder contents 7 receives is: α: (2πf ) 2X r = 4 7896 Cm / 5ec2 in π2 × 22 × 50
= 8.06p Therefore, according to the present invention, it is not necessary to use a very large device to obtain a centrifugal acceleration several times as large as the gravitational acceleration, and therefore, to obtain a machining efficiency several times higher than that of the conventional method. It turns out that it is easy to do.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the processing apparatus of the present invention. 1... Base frame, 4 and 5... Rotating frame, 8... Cylinder, 12... Revolution drive pulley, 16.15.16.
17.18.19...Rotation drive gear system. Mar I11zu1? 10th 1

Claims (2)

[Claims] (1) A method in which a pipe containing a thickness-shear diaphragm material and an abrasive is rotated to form a curved surface on the surface of the material with a curvature close to the curvature of the inner surface of the pipe, in which the pipe is rotated around its central axis. A piping processing method characterized in that, together with the rotation, a revolution is made around an axis parallel to the central axis, and centrifugal acceleration generated by the revolution is made larger than gravitational acceleration. (2) A thickness-shear diaphragm material supports a pipe in which the abrasive is enclosed so that it can rotate around its central axis and can revolve around an axis that is parallel to the central axis, and
A piping device characterized by having a frame that constitutes at least a part of the rotation and revolution drive mechanism.