JPS5840214A - Machining device of race groove in equal speed joint - Google Patents

Abstract

PURPOSE:To facilitate corrective machining of a groove error, by holding an inner or outer race of an equal speed joint in a plane, crossing at a right angle with the rotary shaft of an index table, and moving a ball end cutter at a prescribed angle. CONSTITUTION:Chuck parts 27, 28 hold an inner or outer race 49, 29 in a plane, crossing at a right angle with the rotary shaft of an index table 23, while a ball end cutter 45 is moved always in the above described plane by holding a prescribed angle with the inner or outer race. In this way, even if an error is caused in an indexing position of the index table 23, the depth of a machined groove is only changed by the amount corresponding to the error, and the error can be easily corrected in an after process.

Description

DETAILED DESCRIPTION OF THE INVENTION , I″f1-ml 8B relates to a device for machining grooves in the inner race or outer race of a whistle joint.

As a conventional groove machining device, the one shown in Fig. 1.2-13 is known. In Figure 1, +11 is a base installed on the floor (2), and this base (1)
An index table (4) is supported above, which rotates around a vertical axis of rotation (3). This index table (4) is driven and rotated by a drive device (not shown), and is indexed and stopped at a plurality of positions per rotation by an indexing device (not shown). A plurality of slopes (5) are formed on the index table (4), and each slope (5) supports a chuck part (7) that rotates around a rotation axis (6) perpendicular to the slopes (5). There is. This chuck portion (7) is driven and rotated by a drive device (not shown), and is indexed and stopped at a plurality of positions every 11 revolutions by an indexing device (not shown). Each chuck part (7) holds an outer race (8) of a constant velocity joint with its shaft part (9) and rotating shaft (6) being coaxial. In addition, each chuck part (7) has an outer lace (8).
The inner lace may be retained instead. Ofl
is a bed installed on the floor surface (2), and a slider (11) is supported on this bed 00) so as to approach and separate from it in a horizontal plane with respect to the rotation axis (3) of the index table (4). ing. The slider 01) is moved at a constant speed by a drive device (not shown), and the slider α
1), a rotating ball end cutter 02 is supported so as to be movable up and down.

Ball end cutter (12 lifts and lowers using a template (+,
It is controlled by a hydraulic servo mechanism α in sliding contact with v. Such a groove machining device rotates the index table (4) to a predetermined index position and stops it, and then rotates the index table (4) to a predetermined index position and stops it. 11) is moved forward at a constant speed, the ball end cutter 021 is controlled to copy along the template (131) and the ball end cutter 02 is moved along a predetermined trajectory.This causes the groove 051 of the outer race (8) to align with the ball end. Machining is performed by cutter 07J. However, in the groove machining device as described above, the indexing position of the index table (4) is out of order (this inevitably occurs due to manufacturing errors of the device, etc.)
and outer race (8) for ball end cutter 02.
) is misaligned in the circumferential direction, and as a result, the ball end cutter α2 is located at a position as shown by the imaginary line in FIG. 3, and the ball end cutter 02 processes the misaligned groove. If a groove is machined in such a position, there is a problem in that even if an attempt is made to correct it in a subsequent process, the correction work is extremely difficult.

This invention was made in view of the above-mentioned problem, and it is necessary to hold the inner or outer race of the constant velocity joint in a plane perpendicular to the rotational axis of the index table, and to always hold the ball end cutter in the inner or outer race within the plane. The object of the present invention is to solve the above-mentioned problems by arranging the outer race so that it moves while maintaining a predetermined angle with the outer race.

The present invention will be explained below based on the drawings. 4 to 8 are diagrams showing an embodiment of the present invention.

In Figure 4, Qυ is a bed, and this bed Qυ
On the upper surface of the central part of the
An index table Q31 that rotates around is supported. This index daple (C) is driven and rotated by a drive device (not shown), and is indexed and stopped at three positions per revolution by an indexing device (not shown). Three holders (24J (2) (to)) are installed on the index table at equal angles apart, and each holder (24) 125)' (21i1 has a chuck part @C2F+ for the workpiece 21i1 installed in parallel. These chuck parts @(2) are each driven and rotated by a drive device (not shown), and are indexed and stopped at six positions per rotation by an indexing device (not shown). The outer race (c) of the constant velocity joint is retained, and each outer race (
(c) is arranged so that its axis including the shaft portion (7) is located within a plane (horizontal plane in this embodiment) perpendicular to the rotational shaft, and the chuck portion (c) is located between the rotational shaft and the chuck portion (c). It is arranged so as to extend parallel to a radial straight line 6υ passing through the intermediate point.

A cutting mechanism (33 (c)) is installed on each bed atn on both sides of the index table e31. Each cutting mechanism (33 (c)) has a pace (goods), and each pace (
A pair of guide rails (to) are installed at (b)-L. (g) is the first slidingly supported by pace (goods)
The first slider is a slider, and this first slider can move toward and away from the index table c23 while being guided by a guide rail. C37) is a screw shaft rotatably supported by pace (goods), and this screw shaft c37)
A motor (not shown) is connected to the motor, and the first slider (to) is moved by the rotation of this screw shaft (07). First slider (
A second slider (to) is slidably supported on the second slider (to). OI is a screw shaft perpendicular to the screw shaft c37) rotatably supported by the first slider (to), and a motor (4 (I) is connected to this screw shaft OI.
By rotating this screw shaft OI, the second slider (
(to) moves on the first slider (to) perpendicularly to the sliding direction of the first slider (to). 2 on the second slider (to)
Two spindle heads (40 (41) are installed, each spindle head 0υ (43 has a motor (43 (44)
A ball end cutter 090e, which is driven and rotated by, is supported respectively. This ball end cutter (4
! J (The center line of 4G is located within the plane. Each ball end cutter (4cJ (Ae) is perpendicular to the rotation axis due to the movement of the first and second sliders (3) (to). It always moves along a predetermined trajectory in the plane containing the axis, and during this movement, it makes a predetermined angle (
θ) is always maintained.

Next, the action will be explained.

Here, in order to simplify the explanation, grooving of one outer race will be explained. First, the outer race (c) is transported to the chuck part @@ by a loader (not shown) and then held there. At this time, the outer race holder is held by the chuck part (271 (2)) so that its axis including the shaft part (7) is located within the above-mentioned plane, and parallel to the straight line C31 passing through the rotation axis. Extending. Next, the index table C3 is rotated 120 degrees in the direction of the arrow (toward) to determine its position, thereby moving the chuck part @(2) from the first stage (101) to the second stage (102). At this time, use a ball end cutter (451 Gi
The center point of the hemispherical part (45a) of f9 is located at position (0) as shown in FIG. ) Rotate the G-shaft and fast forward until the center point of ball end cutter (461) reaches position Q.Next, screw shaft C37)
By appropriately controlling the rotation of a9, the ball end cutter (451 (the center point of 4f9) is moved from the position (Q) to the position (Sl) along a predetermined trajectory. 45) The center line of (46) is always located within a plane containing the axis perpendicular to the rotation axis (221), and also always intersects the outer race (C) while maintaining a predetermined angle (θ). Then, four chamfer grooves are machined on the inner surface of the outer race (c) as shown in Fig. 5.6.

Here, if there is an error in the indexing position of the index table (c), as described above, the axis of the outer race (c) will always be located within the plane containing the axis orthogonal to the rotation axis. Ball end cutter (451 (4)
Since the center line of the ball end cutter (4) is also always located within the plane, the outer race wire is aligned with the ball end cutter (4) in FIG.
! n (461) in the direction of arrow (B). Therefore, in this case, the groove (4η) is machined to be shallower or deeper by an amount corresponding to the deviation.

However, since this cutting is cutting along the longitudinal direction of the four grooves (4η), there is no problem because the correction of the groove (4η) can be easily done by changing the cutting grade in the later process.Next, Return the ball end cutter (I51) to the position (Q) along the trajectory (particularly along the trajectory).During this return, rotate the chuck part @C8 60 degrees to determine the position.By repeating the above-mentioned operation, the outer race (towards ) are machined with 6 chamfer grooves (1η).Next, the index table (c) is machined again in the direction of the arrow (A).
The chuck part surface (c) is rotated once to determine the position and moved from the second stage (102) to the third stage (103). In this third stage (103), the second
The stage (102) operates in the same manner as the ball end cutter (451 (4e) to machine the bottom (41) of the groove (47) as shown in Figure 6.7.At this time, the index table (c) is indexed. Even if the position is misaligned, as mentioned above, only the depth of the bottom (48) changes, so it can be easily corrected in the subsequent process without any problem.In this way, once the groove machining is completed, the index After the table @ is rotated 120 degrees in the direction of arrow (5) and the position is determined, the outer race (toward) is moved by a loader (not shown).
is taken out and transported to the next process.

The above is a description of the groove machining of the outer race (c), but according to the present invention, the groove machining of the inner race (4) can also be performed as shown in FIG.

As explained above, according to the present invention, when the chuck part holds the inner or outer race in a plane perpendicular to the rotation axis of the index table, the tomonipole end cutter always maintains a predetermined angle with the inner or outer race in the plane. By arranging it so that it moves with
Even if an error occurs in the indexing position of the index table, the depth of the groove formed in the inner or outer race simply changes by an amount corresponding to the error.

Such changes in depth can be easily corrected in a subsequent process, making the correction work easier.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing a conventional constant velocity joint inner and outer race groove processing device, FIG. 2 is a partially sectional side view showing an outer race and a ball end cutter, and FIG.
The figure is a view from the Ill-In arrow in FIG. 2, FIG. 4 is a front view showing one embodiment of the present invention, and FIG. 5 is a partially sectional plan view showing the outer race and ball end cutter in the second stage. 6 is a partially sectional plan view showing the outer race and the ball end cutter in the third stage, FIG. 7 is a front view of the outer race in the third stage, and FIG. 8 is the inner race and the ball end cutter. FIG. (2. Rotating axis (c)... Index table el... Outer race 0 ■).
...Straight line (451...Ball end cutter (47)
) (4 barrels...Groove (4g)...Innerrace patent applicant Nissan Motor Co., Ltd. agent Patent attorney Ariga Gun - Department Figure 2 Figure 3

Claims (1)

[Claims] It has a chuck part that holds the inner race or outer race of the constant velocity joint, and is equipped with an index table that is rotated and positioned around the rotation axis, and a ball end cutter that moves along a predetermined trajectory and processes the grooves in the inner or outer race. In the constant velocity joint race groove processing apparatus, the chuck part holds the inch or outer race in a plane orthogonal to the rotation axis, and the ball end cutter is always held in the plane. A race groove machining device for a constant velocity joint, characterized in that it is arranged to move while maintaining a predetermined angle with the inner or outer race.