JPS5988253A - Finishing method and device of bearing rolling surface using lap tape - Google Patents

Abstract

PURPOSE:To enable a rolling contact surface to be high efficiently lapped, by crossing a lap tape at a right angle with the direction of rotation of a bearing ring and intermittently feeding the lap tape when it is not pressed to the rolling contact surface, in the case of lapping by the lap tape brought in slidable contact with the end face of a pressing member performing swivel motion. CONSTITUTION:Rotating a ball bearing outer ring 1 supported by a rotary jig, a pressurizing cylinder 10 is operated, and a lap tape 33 is pressed to a rolling contact surface 2 of the bearing outer ring 1 by the end of a pressing member 26 to lap the rolling contact surface 2 by swivelling a swivel arm 3 about the center of a swivel shaft 4. When lapping is finished, if the pressurizing cylinder 10 is extended stopping the swivel motion, the tape 33 is detached from the rolling contact surface 2, and a tape feed gear 19 on a one-way clutch 17 is turned a fixed amount by rotation of a ratchet gear 20, then an unused part of the lap tape 33 is transferred to the end of the pressing member 26. In such way, the rolling contact surface of the bearing can be accurately finished with good accuracy further with high efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION This issue #4 relates to a method and apparatus for finishing a bearing raceway surface using wrap tape.

Conventionally, when finishing a ball groove-shaped bearing raceway formed on the inner periphery of a ball bearing outer ring, for example, the bearing outer ring supported by a rotating jig is oscillated so that it corresponds to the center of curvature of the raceway. A finishing method has been adopted in which a grinding wheel is provided at the center of the interlocking motion, and the tip of the grinding wheel is pressed against the rolling surface of the outer ring of the bearing, while giving the grinding wheel an oscillating motion to enhance the grinding effect. However, with this method, it is necessary to always align the tip of the grinding wheel with the curvature of the rolling surface of the outer ring of the bearing, which makes correction of the grinding wheel extremely troublesome and time-consuming, and also causes wear and tear on this part. Since the grinding wheel is intense and the grinding wheel needs to be replaced frequently, it is difficult to keep track of the grinding wheel, which is not only uneconomical, but also wastes the time required to replace the grinding wheel, resulting in inefficiency.

On the other hand, regarding the finishing process of kernel seeds, a method using a wrap tape to which abrasive grains are fixed has been proposed [11]. By the way, in the conventional method of this type, the lag tape was continuously fed in the same direction as the rotational direction of the annular workpiece supported by a rotating jig while applying pressure to the finished surface of the workpiece. However, this conventional method has the following problems.

(1) Since the wrap tape is fed in the same direction as the workpiece feed direction, finishing of the inner diameter surface of an annular workpiece such as the raceway surface of a bearing outer ring requires a pressure mechanism for the wrap tape, several feeding mechanisms, and This requires a mechanism to convert the running of the wrap tape from the circumferential direction of the workpiece to the axial direction of the workpiece, which puts a limit on the workpiece size that can be processed (minimum workpiece size).
Hini.

(21 Since the lamp tape is continuously fed in the same direction as the workpiece feeding direction, the wrap tape tends to break at the corners of the tape pressurizing member, and the feeder of the wrap tape is Complicated preparation is required with consideration to tensile strength, etc., and this makes it unsuitable for mass-produced workpieces due to the hassle of multiple stage changes.

(3) Since the wrap tape is continuously fed during processing, it is not suitable for precision processing such as super finishing processing, which involves blending the abrasive grains with the finished surface of the workpiece and abrading it appropriately. In other words, one end of the workpiece is always machined with a fresh cutting edge, while the other end is machined with a somewhat worn cutting edge, resulting in partially different finished surfaces and poor shape accuracy. Become. Furthermore, in order to perform ultra-precision processing such as a mirror surface, the grindstone must be used in a state where it has been used for a certain period of time, but if the wrap tape is continuously fed, the desired mirror surface cannot be obtained.

(4) On a finished surface that has a curvature in the direction perpendicular to the wrap tape feeding direction, such as the raceway surface of a ball bearing, etc., the finished surface has a principal dimensional shape, so the wrap tape Adhesion with the pressure member deteriorates. That is, since the application surface of the pressure member has the same three-dimensional shape as the finished surface of the workpiece, for example, a horse saddle shape, as shown in FIG. When the wrap tape (A) is conveyed over the pressure surface (b) of
B) The front part (b) and the rear part (1:I) of the pressure surface (1)) are in close contact, but there is a gap in the center part (center part) of the pressure surface (b). The problem has been addressed and the flaws have been improved and removed.The structure of the present invention will be explained below based on the embodiment shown in the drawings.

In the drawing, (1) is the ball bearing outer ring which is the workpiece.
A ball groove-shaped raceway surface (2) is formed on the inner periphery, and it rotates. ￥l
It rotates while being supported by a shell (not shown). (3) has its base attached to the rocking shaft (4) of the rocking mechanism.
), the piston (6) is slidably inserted into the piston hole tlsl formed at the tip, and the piston (6) is slidably inserted into the piston hole tlsl, and both sides of the piston hole (5) are attached to the mounting body 1.
A pressurizing cylinder 1101 is constituted by closing the piston rod (9) which is further connected to the piston (6) and protrudes through the front body (7). (llj) Connecting material (I) is attached to the piston rod (9) of the pressure cylinder (lO
2) is a pressurizing body connected via a pressurizing cylinder (101
It passes along with the expansion and contraction movement of. 0311d: Pole slide $Il#I arranged parallel to N-motion arm (3)
(141H to pole slide 05)
It is a pressurizing plate that is freely inserted and inserted, and is always elastically pressed by the pressurizing rod (Ill (IIll) by the urging force of the spring 06) arranged between the swinging arm (3).
I7) is a gear shaft (one-quake latch fitted in one barrel) attached to the swing arm (3), and the tape feeding gear Q
9) Also, the ratchet gear is integrally fixed to the gear shaft end so that it can rotate in one direction. (211i!
An idle gear is installed on the swing arm (3) via a gear holding mechanism (24), and is always elastically engaged with the tape feeding gear 09 by the gear holding mechanism. (Foundation)
is a ratchet pawl whose base is pivoted by a pin in a hollow part of the pressure rod (Il), and the tip of the ratchet pawl is
The l1ll shaft (
) is a pressure member fixed to the tip of the pressure plate 031,
The tip is formed to have the same curvature as the raceway surface (2) of the ball bearing outside (1), and the center of the curvature is the same as the curvature of the rolling surface (2) of the ball bearing outside @ (1), and the center of the curvature is
111 (located on the central axis (0) of 41.
bend the center at the swinging arm (3) via the pin (c)
<The tension roll is rotatably installed at one end of the L-shaped tension lever e291 that is pivoted, and the stopper square piece is fixed at the other end of the tension lever (support) and the swing arm (3). Spring placed between 9 (31
) is elastically pressed against a roll follower rotatably mounted on the swing arm (3). C11l is a wrap tape with abrasive grains adhered to the surface.
The tape is rewound from a winding reel (not shown), passed through a tension roll (27), a 4-output gear (+9), and a guide roll before being roped to the tip of a pressure member (shape).
The tape is caught between the a-field gear (+9) and the idle gear e2+1 and wound onto the mD reel (not shown). In addition, in the drawing (3151 is a pressure member to stabilize the running of the wrap tape (g)), it is a tape and running guide installed near the tip of the tape, and as shown in Figure 5, it is a tape and a running guide. Regulation & (3) Two guide plates should be set up on the 6) side of the two guide plates to guide the running of the lap (83) and also to control the movement of the lap (83). This restricts the escape of the wrap tape (83) in the width direction,
Stabilize the running of the wrap tape 3). (:l[3
) 07) is a stopper bolt fixed to the swing arm (3) to restrict the sliding of the pressure plate 091, and 07) is a tape tension gear.

Next, the operation procedure of the above configuration of the present invention will be explained. First, the ball bearing outer ring (1) is supported and rotated together with the rotating shaft. In this state, shorten the piston rod (9) of the pressurizing ring (10) and advance the pressurizing rod (111), press the pressurizing plate H with the tip of the pressurizing rod (11), and press the pressurizing plate H. It slides along the ball slide shaft Q41941, and by sliding with it, wraps the wrap tape (83) at the tip of the pressure plate (pressure member installed at the tip of the ball bearing outer ring +1).
is pressed against the rolling surface (2). Then, 2 pieces of tape (
33) to the raceway surface (2) of the ball bearing outer ring ill.
When pressed by the tip of the swing arm (3), the swing mechanism swings the swing arm (3) around the swing IIj axis (4), and the swing link u1 applied by the swing arm (3) is moved around the wrap tape. give to The rolling surface (2) of the ball bearing outer ring (1) is lapped by the rotation of the ball bearing outer ring (t1) and the swinging movement 11 of the wrap tape (T).

When the raceway surface (21) of the ball bearing outer ring (1) is finished, the swing arm (3) stops swinging, and at the same time the pressurized sill (
When the piston rod (9) of 101 is extended and the pressure rod (1) is retreated, the pressure plate 031 is pushed back along the ball slide axis +141 +14 by the spring OQ.
The wrap tape rope attached to the tip of the pressure member leaves the raceway surface (2) of the ball bearing outer ring 0). In addition, a pressure rod (
When 11) moves backward, the ratchet pawl (2) S) rotates the ratchet gear ■ t7 and the same one-way clutch θη-
The tape feeding gear (IB) fixedly attached to the IB is rotated by a certain amount, and the wrap tape (33) caught between the tape feeding gear (1→ and the idle gear t21) is transferred by a certain amount. As a result, the used portion of the wrap tape (33) is transferred from the tip of the pressure member It (2a+) to the take-up reel side, and the unused portion of the wrap tape (33) is transferred to the pressure member (2→
is transferred to the tip of the When the pressure rod (11) moves forward, the ratchet pawl (rotation) narrows the spring 4 and slides on the ratchet gear (3) to move forward, and at that time, the ratchet gear ←0) is moved by the one-quake clutch θ. Because of the interposition of the wrap 4-p (33), it is not rotated and prevents the wrap 4-p (33) from running backwards.

As described above, this invention provides a lamp tape for a ball bearing outer ring i.
Because it is transferred in a direction perpendicular to the rotational direction of tl,
Wrap tape (can prevent side breakage, and can also finish the inner diameter surface of small-diameter annular workpieces. Also, because the wrap tape is intermittent feeding in consideration of wear and mating of abrasive grains, 1. Unlike continuous feeding, there is no difference between old and new lapped abrasive grains, and there is no risk of deformation of the shape.
By setting the number of rotations of the wrapping tape, it is possible to wrap objects with a desired finished surface roughness. In addition, the feeding mechanism and pressurizing mechanism for the wrap tape @ (support) are connected to the 7 pressurizing shillings (l
Since it is driven by O(, the entire device can be made compact, and the tape does not move during pressure
There is no problem with tape breakage. In addition, since the processing method does not use a grindstone, there is no need to replace the grindstone, and long-term unmanned operation can be realized.

As for the workpiece support method, the 20-rule/shu quip is effective for finishing the inner diameter, and the pressure plate shoe support type is effective for finishing the outer diameter.

As explained above, according to the present invention, it is possible to achieve excellent practical effects such as being able to finish finishing the bearing rolling surface with high precision and high efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of a processing device for finishing a bearing raceway surface according to the present invention, Fig. 2 is a left side view showing a part of the machine in cross section, and Fig. 3 is a right side view. Figure 7 is a cross-sectional plan view taken along the line ■-ff in Figure 1, and Figure 5 is a slope view showing a conventional pressure member wrapped in wrap tape and running with a river running. , Fig. g is a perspective view showing the tape running guide. fil... Ball bearing outer ring, (2)... Raceway surface, (3)...
Swing arm, (4) - Swing shaft, (9) - Piston rond, (10 - Pressure cylinder N ('Lee - Pressure rod, O-wrinkle - Pressure plate, H - Spring, O'?)・Fist one-quay clutch, 01fl・-exit axle, ('')・tape feeding gear, (c)・ratchet gear, (2+1
...Idle gear, Sui...Ratchet pawl, @iii...
Spring, □□□1)...Pressure member, deer...Tension roll, (2!I)...Tension reno <-1Ct
a. Roll follower, corrugated willow, wrap tape, (c)
・Tape tension gear. Figure 2, Sister 3, Figure 4, Figure 560, 61

Claims (1)

[Claims] (The pressure member is placed on the rolling surface of the bearing raceway having a predetermined curvature, with the center of curvature as the center of oscillation.
This is a finishing method in which the wrap tape that is in sliding contact with the tip surface of the pressure member is pressed and wrapped. Finishing method for bearing raceway surface using wrap tape characterized by intermittent feeding (2)
“A device for lapping the rolling surface of a bearing raceway by pressurizing a wrap tape that is in sliding contact with a pressure member, which is a device for lapping the raceway surface of a bearing raceway, which interlocks a rocker U and a rocker U around a rocker shaft of a rocker mechanism. an arm, a pressure rod that moves with a pressure cylinder installed at the tip of the swinging arm, elastically abuts on the pressure rod, and is formed in the same shape as the rolling surface; The center of curvature of the rolling surface is interlocked with a pressure member installed on the central axis of the swing shaft and a feed pawl pivotally connected to the pressure rod, so that the center of curvature of the rolling surface is intermittent by the reciprocating movement of the pressure rod. Consists of a tape feeding mechanism in which a rotating ratchet wheel and a one-sided clutch that only transmits rotation in one direction are integrated into the tape feeding gear, and the lamp tape is caught and hooked through an idle gear. A finishing device for a bearing raceway surface that uses a two-prong tape.