JPH029570A - Processing method with two-side lapping machine - Google Patents

Abstract

PURPOSE:To apply equal processing to the oversurface and undersurface of a work by rotating an upper and a lower lapping machine at approx. the same speed in the identical direction. CONSTITUTION:A planet gear 14 is rotated round its own axis and also orbited by means of relative rotation of a sun gear 12 and an internally cogged gear 13, and at the same time, an upper and a lower lapping machine 10, 11 are rotated to perform lapping of both the oversurface and undersurface of a work 16 rotating in a single piece with this planet gear 14. Therein the two lapping machines 10, 11 are rotated at approx. the same speed in the identical direction. Further, the direction and speed in rotation of these lapping machines 10, 11 relative to the orbit of the planet gear 14 shall be approx. the same as the direction and speed in turning round own axis of the planet gear 14. Consequently the mean value of the relative speed with the lapping machines 10, 11 is made approx. the same in different parts of the work 16, which is rotating in a single piece with the planet gear 14, and thus the oversurface and undersurface of the work 16 can be processed simultaneously in equal processing condition.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a processing method in a double-sided lapping machine equipped with upper and lower lapping plates.

Prior Art and Problems of the Invention A double-sided lapping machine includes a lower lapping surface plate, an upper lapping surface plate, a sun gear placed in the center of these lapping surfaces, an internal gear and a sun placed around the lapping surface plate. A planetary gear is placed between the gear and the internal gear, and a workpiece is attached to the planetary gear or a part that rotates together with the planetary gear, and the planetary gear rotates and revolves due to the relative rotation of the sun gear and the internal gear. Also known is a machine in which both sides of a workpiece are machined by rotating upper and lower lap plates.

However, in conventional wrapping machines, the upper and lower lap plates always rotate in opposite directions, and even if ideal relative rotation conditions are established on the lower lap plate side, the upper lap plate side In this case, the relative machining speed differs by the amount of rotational speed of the planetary gear, resulting in a machining state that differs from the ideal condition. Therefore, ideal planar processing of both the upper and lower surfaces is impossible.

An object of the present invention is to solve the above-mentioned problems and provide a processing method for a double-sided lapping machine that can perform ideal processing on both the upper and lower surfaces.

Means for Solving the Problems The processing method according to the present invention includes a lower lap surface plate, an upper lap surface plate, a sun gear placed in the center of these lap surface plates, and an internal gear placed around the lap surface plate. and a planetary gear disposed between the sun gear and the internal gear mrL, a workpiece is attached to the planetary gear or a part that rotates integrally with the planetary gear, and the planetary gear rotates on its own axis due to the relative rotation of the sun gear and the internal gear. In a double-sided lapping machine, which processes both sides of a workpiece by revolution and rotation of the upper and lower lap surface plates, the upper and lower lap surface plates are rotated in the same direction at approximately the same speed, and the lap surface plate is This method is characterized in that both sides of the workpiece are machined by making the direction and speed of relative rotation approximately equal to the direction and speed of rotation of the planetary gear.

Function: Since the upper and lower lap plates rotate in the same direction and at approximately the same speed, the machining conditions on both the upper and lower surfaces of the workpiece are approximately the same.

In addition, since the direction and speed of the relative rotation of the upper and lower lap surface plates relative to the revolution of the planetary gear are approximately the same as the direction and speed of rotation of the planetary gear, it is possible to The average values of the relative speeds with respect to the lapping surface plate are approximately equal in each part, and ideal planar processing is performed.

Embodiment Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 schematically shows the main parts of a double-sided wrapping machine.

The double-sided wrapping machine has upper and lower wrapping plates (10) (
11), a sun gear (12), an internal gear (13) and a planetary gear (14).

The lower lap surface plate (lower surface plate) (11) is arranged facing upward.

The upper lap surface plate (upper surface plate) (10) is the lower surface plate (
11) are arranged in a downward facing manner above.

The sun gear (12) is arranged concentrically at the center between the upper and lower surface plates (10)<11).

The internal gear (13) is arranged concentrically around the upper and lower surface plates (10) and (11).

The planetary gear (14) is disposed between the upper and lower surface plates (10) and (11) and between the sun gear (12) and the internal gear (13), and meshes with them. The J foot gear (14) has
A workpiece storage pocket (hole) (15) is formed, a workpiece (16) is placed in this pocket (15), and both upper and lower surfaces of the workpiece (16) protrude upward and downward from the planetary gear (14).

The surface plates (10) (11), the sun gear (12) and the internal gear (13) are rotated independently of each other or in relation to each other by suitable drive means.

Next, an example of a processing method using the above-mentioned lapping machine, that is, a method according to the present invention will be explained.

First, the upper and lower surface plates (10) and (11) are rotated in the same direction at the same speed. In addition, the direction (hereinafter simply referred to as relative rotation direction) and speed (hereinafter simply referred to as relative rotation speed) of the relative rotation of the surface plates (10) and (11) with respect to the revolution of the planetary gear (14) are determined relative to the rotation of the planetary gear (14). Equal to direction and velocity.

In this way, the upper and lower constant ffi <10) (It
) rotates in the same direction at the same speed, so the workpiece (16
) will have the same machining status on both the top and bottom. Also, a surface plate (1
0) The relative rotation direction and relative rotation speed of (11) are i1
Since the rotation direction and rotation speed are equal to the rotation speed of the planetary gear (14), as will be explained next, the surface plate (10) (1
The average value of the relative speed with 1) becomes almost equal, and ideal planar processing is performed.

In Fig. 2, the relative rotation direction of the surface plates (10) and (11) is counterclockwise and the relative rotation speed is N (rpm), and the rotation direction of the planetary gear (14) is counterclockwise and the rotation speed is n.
(rpH). Also, the center 0 of the sun gear (12)
A point on the workpiece (IB) that is on a straight line passing through 5 and the center Oc of the planetary gear (14) and is outwardly away from Oc.
, Let B be the point on the workpiece (16) that is inwardly away from Oc, the distance from 05 to QC be r, the distance from SO5 to A be 9, and the distance from O5 to B be r9.

The amount of lapping W is expressed by the following equation (1).

Wo=p*y/l ・・・・・・・・・(1) Here,
p (kit/ci) is the lap pressure, v (cm
/1n) is the lap speed (workpiece (16) and surface plate (10)
(11) relative velocity), t(lIin) is the lap time.

From equation (1), in order to process a workpiece into an ideal flat surface, it is sufficient to keep the product of p and ■ constant within the machining plane. Since p is constant on an ideal flat lap surface plate, the average value of ■ ( Average lap speed) Vu may be kept constant.

O when assuming that the planetary gear (14) does not rotate
c, lap speed at A and B (tentative lap speed)
are expressed by the following equations (2) to (4), respectively.

V CR”” 2 π r(φ N...
・・・ ・・・ Ku2) VAR""2πr^ ・N
・・・・・・・・・(3) v sR= 2 yr r
B -N ----------・(4) Also, when the planetary gear (14) is rotating at a speed n, the lap speed at oc, A, and 已 (lap speed of A) is VC%, respectively. Assuming VA and V3, these are the following equations (5
) to (7).

At Oc, the speed due to rotation is 0, so C-VCR -2π'c -N (5) At A, the decrease in speed due to rotation is 2πr'n From, VA−VAI+−2yr r lIn −2yr rAeN−2yr r IIn −=(8
) At B, the increase in speed due to rotation is 2πr'n
Therefore, VB−vBR+2πr ・n −2πra −N+2πr−n =・(7) Equation (6)
From (7), the relationship between n and N when VA-VB is obtained is as shown in the following equation (8).

n - (r, -rB) N/2 r -...
・(8) Here, since ra rB-2r, n-
N ・・・・・・・・・(9)

Substituting equation (9) into equation (6), vA-2π(rA-r) ・N =-=-410)
So, rA-rawr. Therefore, vA′″2πr
CN mvc (11).

Also, by substituting equation (9) into equation (7), v, -2x
(rB+ r) ・N −・−−−(12) Here, since rB+r−rc, vB12πrCIIN mvc ・・・・・・・・・(13)
Therefore, if nmN, then VA swvB mvc, and the average lap speed VM is approximately constant for all points on the workpiece (1B).

Effects of the Invention According to the processing method of the present invention, as described above, the upper and lower lap plates rotate in the same direction and at substantially the same speed, so that the processing conditions on both the upper and lower surfaces of the workpiece are substantially the same. In addition, since the direction and speed of relative rotation of the upper and lower lap surface plates with respect to the revolution of the planetary gear are approximately equal to the direction and speed of rotation of the planetary gear, each part of the workpiece that rotates together with the planetary gear has a rotational speed with respect to the lap surface plate. The average values of the relative velocities are approximately equal, and ideal planar machining is performed. Therefore, it is possible to ideally process both the upper and lower surfaces of the workpiece.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a double-sided wrapping machine showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram illustrating the principle of processing. <10)...Upper lap surface plate, (11)...Lower lap surface plate, (12)...Sun gear, (13)...Internal gear, (14)-゛Planetary gear, ( lB)...work. Patent applicant: Hitachi Zosen Corporation

Claims (1)

[Claims] A lower lap surface plate, an upper lap surface plate, a sun gear disposed at the center of these lap surface plates, an internal gear disposed around the lap surface plate, and a combination of the sun gear and the internal gear. A workpiece is attached to the planetary gear or a part that rotates together with the planetary gear, and the planetary gear rotates and revolves due to the relative rotation of the sun gear and internal gear, as well as the upper and lower lap surface plates. In a double-sided lapping machine, which processes both sides of a workpiece by rotation, the upper and lower lapping plates are rotated in the same direction at approximately the same speed, and the direction and speed of the relative rotation of the lapping plate to the revolution of the planetary gear is controlled by the planetary gear. A processing method in a double-sided lapping machine characterized by processing both sides of a workpiece in a direction and speed that are approximately equal to the rotational direction and speed of a gear.