JPH06143137A - Grinding wheel side face dresser - Google Patents

Abstract

PURPOSE:To permit the simultaneous grinding of a collar surface by a grinding wheel by finely dressing the inclined surfaces on both the sides of the grinding wheel, without reducing the rigidity of a dressing tool supporting part. CONSTITUTION:Two disc shaped grinding wheels 2A and 2B whose side surface are formed to each truncated section consisting of inclined surfaces AR, AL, BR, and BL on the outer peripheral edge are arranged coaxially and applied to a grinder. In this grinder, two dressing slides 9 and 10 each having a pair of arms 11 and 12 are installed. As for each dressing slide 9, 10, dressing tools 13R and 14R which contact the inclined surface AR and BR of the advance grinding wheels 2A and 2B are installed on the inside surface of one side arm 11R and 12R of pair of arms 11 and 12, and dressing tools 13L and 14L which contact the inclined surfaces AL and BL of the contiguous grinding wheels 2A and 2B are installed on the outside surfaces of the other arms 11L and 12L. Further, each dressing slide 9, 10 can be advanced and retreated in the direction set along the inclined surfaces AR, BR, and AL, BL in contact with the dressing tool.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a whetstone side dresser which is equipped on a grinder or the like for grinding the inner ring brim of a double-row cylindrical roller bearing having a flanged surface as a taper surface and which simultaneously dresses both side surfaces of two grindstones. Regarding

[0002]

2. Description of the Related Art In a cylindrical roller bearing with a collar, in order to increase the speed, the collar surface has a tapered surface for improving lubricity. When grinding the inner ring flange having the tapered surface, as shown in FIG. 7, the grindstone 51 is one in which both side surfaces 51a of the outer peripheral edge are inclined surfaces.

In such a dressing device for the side surface 51a of the grindstone 51, a dress slide 52 corresponding to each side surface 51a is provided, and each dress slide 52 is slightly tilted from a surface perpendicular to the rotation axis R of the grindstone 51. The one that moves back and forth is used. The dress slide 52 has a diamond 53 at the tip.

Some cylindrical roller bearings having a tapered flange surface have a double row structure as shown in FIG. In the figure, 61 is an inner ring, 62 is an outer ring, and 63 is a roller. In this bearing, in order to simultaneously process the four flange surfaces of the inner ring flanges 61a and 61b, two grinding stones 5 as shown in FIG.
1, 51 will be installed coaxially and used. Each Tsuba 61
The inclinations of a and 61b, that is, the inclination α of the side surface 51a of the grindstone 51 is about 10 'to 15'.

[0005]

In this case, the interval d between the two grindstones 51, 51 is set to be very narrow, for example, about 2 to 5 mm, in accordance with the width dimension of the central inner ring flange 61b. . Therefore, if two dressers shown in FIG. 7 are arranged in parallel and used for each grindstone 51 in FIG. 6, two grindstones 5
The diamond support portions of the two dress slides 52 that are inserted between the first and the first parts are narrow in width in order to avoid mutual interference, and the rigidity required for the dress cannot be obtained. If the two dressers are vertically displaced, the grindstones 51, 51
Although there is a margin in the arrangement of the diamond support portion between the two, since a total of four dress slides 52 are used, it is still difficult to arrange the dressers shown in FIG. 7 side by side, considering the arrangement space of the advance / retreat guides and the drive system. Therefore, two whetstones 51a
In many cases, it is not possible to dress the side surface 51a on the adjacent side.

As a solution to this problem, it is possible to use a rotary dress, but since the rotary dress has a complicated structure and is expensive and cannot be adjusted according to the type of product, it is possible to realize cost reduction in a bearing of a large number of types and a small amount. Can not.

As described above, since an appropriate dressing device cannot be obtained, in practice, four flange surfaces of the inner ring 61 in FIG. 5 cannot be ground simultaneously, and one grindstone 51 is moved in the axial direction. Alternatively, the inner ring 61 is turned over to perform grinding for each groove. Therefore, there is a problem that productivity is poor and it is difficult to obtain a high degree of parallelism of the flange surface between the two rows of grooves.

An object of the present invention is to provide a whetstone side dresser having a simple structure capable of accurately dressing the inclined surfaces on both sides of two whetstones without lowering the rigidity of the dressing tool support portion in the dress slide. That is.

[0009]

DISCLOSURE OF THE INVENTION A grindstone side dresser according to the present invention is a disk-shaped grindstone whose outer peripheral edge is formed in a trapezoidal cross section having inclined surfaces on both sides, and is coaxially provided with a slight gap between outer peripheral portions. It is applied to two grinding machines installed side by side. In this grinder, two dress slides each having an arm pair for letting each grindstone enter between each other are provided. Each dress slide has a dressing tool on the inner surface of one arm of the pair of arms that contacts the inclined surface of the grindstone between the pair of arms, and an outer surface of the other arm that contacts the inclined surface of the adjacent grinding stone. Shall have. Further, each dress slide can be moved back and forth in the direction along the inclined surface with which the dress tool is in contact.

[0010]

According to this structure, the dressing tool provided on the pair of arms of one dress slide dresses the pair of parallel inclined surfaces of the two grindstones facing the same direction, and the dressing slide of the other dress slide. With the dressing tool provided on the pair of arms, the remaining two inclined surfaces of the two grindstones are dressed. Both dress slides are arranged offset from each other in the circumferential direction of the grindstone, so that the arms that enter between the two grindstones do not interfere with each other, and these arms are thick enough to provide the necessary rigidity for dressing. Can be Moreover, since two dressing tools are provided on the same dress slide so that the parallel inclined surfaces of the two whetstones are dressed at the same time,
The dress slide and its drive system are two, and the structure is simple. In this way, it is possible to dress two adjacent grinding wheels, and as a result, two grinding wheels make a total of four rows of grooves in two rows.
It is possible to grind the side surfaces at the same time with high precision.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. Fig. 2 (A) is a plan view of the collar grinder, (B)
Is a front view of the same. Two disc-shaped grindstones 2 on the grindstone shaft 1
A and 2B are attached at a slight interval, and a spindle 3 for driving the work W and a grindstone side surface dresser 4 are installed on both sides of the grindstone shaft 1. The grindstone shaft 1 is installed parallel to the spindle 3 on a grindstone base (not shown) and is driven to rotate, and moves forward and backward with respect to the spindle 3 in the radial direction (X-axis direction).
The work W is rotatably supported by the work support 5 and is attracted to the magnet chuck of the spindle 3 to be rotationally driven.

The work W is a material which becomes the inner ring 61 of the double-row cylindrical roller bearing shown in FIG. 5, and has two circumferential grooves Wa turned. The grindstones 2A and 2B grind each flange surface, which is a side surface of the groove Wa, into a predetermined tapered shape, and the outer peripheral edge thereof has inclined surfaces AR, AL, and
It is formed in a trapezoidal cross section that becomes BR, BL. The inclination angle of each inclined surface AR, AL, BR, BL is a slight angle of about 10 'to 15', like the inclination angle α of the grindstone 51 shown in FIG. The diameter of the grindstones 2A and 2B is, for example, 400
~ 500φ. The grindstones 2A and 2B may be formed by grinding the bottom surface, which is the raceway surface of the groove Wa of the work W, at the same time as the brim surface. In that case, separately from the grindstone side surface dresser 4 of FIG. A dressing device for dressing the surface is provided as appropriate.

In FIG. 2, the whetstone side dresser 4 has a dressing head main body 7 installed on a frame 6 so as to be capable of advancing and retreating in the X-axis direction with respect to the whetstone spindle 1, and a dressing head 8 protruding from the dressing equipment main body 7. A pair of dress slides 9,1
It is configured by providing 0.

As shown in FIG. 1, each dress slide 9,
10 has arm pairs 11 and 12 that allow the outer peripheral edges of the grindstones 2A and 2B to enter, and the approach grindstone 2 to the inner surface of one arm 11R and 12R in each arm pair 11 and 12.
Dress tool 13 in contact with the inclined surfaces AR and BR of A and 2B
Dressing tools 13L and 14L which have R and 14R and which contact the inclined surfaces AL and BL of the adjacent grindstones 2A and 2B are provided on the outer surfaces of the other arms 11L and 12L. Each dress tool 13R, 13L, 14R, 14L consists of a diamond tool. The distance between the dressing tools 13R and 14R and the distance between the dressing tools 13L and 14L are two grinding stones 2
The center distance B between A and 2B.

Both dress slides 9 and 10 are shown in FIG.
As described above, they are arranged above and below the grinding wheel center level H to such an extent that they do not interfere with each other, that is, slightly displaced in the circumferential direction of the grinding wheels 2A and 2B. Each dress slide 9, 10
Is the upper and lower slide guides 15, 16 as shown in FIG.
It is supported so that it can move back and forth, and can be driven back and forth by a forward and backward drive device (not shown) such as a hydraulic cylinder. The slide guides 15, 16 are dress slides 9, 1 in this embodiment.
0 dovetail groove 15 that engages with a dovetail-shaped protrusion protruding to the side surface
a, 16a. The advancing / retreating directions Xa and Xb of the dress slides 9 and 10 respectively correspond to the corresponding grindstones 2.
The directions are along the inclined surfaces AR and BR of A and 2B, and the directions along the inclined surfaces AL and BL. Slide guide 1
5, 16 are installed in the housing of the dress head 8 in FIG.
The position can be adjusted in the direction orthogonal to a and Xb.

The operation of the above configuration will be described. When dressing, bring the dressing device body 7 close to the grindstones 2A, 2B,
Advance both dress slides 9 and 10. This allows
A pair of arms 11R, 11L of one dress slide 9
The dressing tools 13R and 14R provided on the two dressing wheels 2A and 2B dress the pair of parallel inclined surfaces AR and BR facing the same direction, and the pair of arms 12R and 12R of the other dressing slide 10, The dressing tools 13L and 14L provided on the 12L, the two grindstones 2A and 2B
The remaining two inclined surfaces AL and BL are dressed.

Dress tool 1 for both dress slides 9 and 10
Since 3R, 13L, 14R, and 14L are vertically displaced from the grindstone center H as shown in FIG. 1B, the grindstones 2A and 2B are
Although the dressing tool passage path in (1) is not exactly a straight line and is slightly bent, the dressing tool deviation amount from the grinding wheel center level H is smaller than the grinding wheel diameter, and thus is usually a negligible value. The dress slides 9 and 10 may be installed so as to advance and retreat toward the grindstone center O as shown in FIG.
With this configuration, the dressing tool passage paths a and b are straight lines.

According to the grindstone side dresser 4, the inclined surfaces AR, AL, and AL on both sides of the two grindstones 2A, 2B are thus formed.
BR and BL can be dressed at the same time. Since both dress slides 9 and 10 are arranged vertically offset, an arm 11L and an arm 12R that enter between the two grindstones 2A and 2B.
The arms 11L and 12R can be thick enough not to interfere with each other and to have sufficient rigidity necessary for the dress. Further, two dress tools 13R, 13L, 14R, 14L are provided on the same dress slides 9, 10 to provide two grindstones 2.
A and 2B parallel inclined planes AR and BR, and AL and BL
Since the dressing slides 9 and 10 and the driving system therefor are required to be two at the same time, the structure is simplified.

The grinding machine equipped with the grindstone side dresser 4 solves the problem of dressing as described above, and the two grindstones 2A and 2B are inclined at four positions in the two grooves Wa of the work W. The collar surface can be processed simultaneously with one cut. Therefore, the grinding process can be performed in about half the time required for the work with one grindstone, and the grinding device can be integrated into one unit. Further, since the four flange surfaces of the two grooves are ground by one chuck of the work W, an error due to re-grip does not occur, and the conical central axes of the four flange surfaces are accurately aligned. Therefore, the flange-inclined double-row cylindrical roller bearing can be made highly accurate without so-called end face runout of the flange.

[0020]

The grinding wheel side dresser of the present invention is a dressing tool provided on each arm of one dress slide, with two dress slides each having a pair of arms offset from each other in the circumferential direction of the grinding stone. Since the pair of parallel inclined surfaces of the two whetstones are dressed and the dressing tool provided on the arm of the other dressing slide is used to dress the remaining two inclined surfaces of the two whetstones, There is no interference between the arms that enter between the whetstones, and the inclined surfaces on both sides of the two whetstones can be accurately dressed without reducing the rigidity of the arms that are the support parts of the dressing tool. Moreover, only two dress slides and their drive systems are required, which is advantageous in that the structure is simple.

[Brief description of drawings]

FIG. 1A is a plan view of a main part of a grindstone side dresser according to an embodiment of the present invention, and FIG. 1B is a sectional view of the same part.

FIG. 2A is a plan view of a grinding machine equipped with a grindstone side surface dresser of the same embodiment, and FIG. 2B is a front view thereof.

FIG. 3 is a perspective view of a whetstone side dresser.

FIG. 4 is a layout explanatory view of a dress slide of a whetstone side dresser according to another embodiment.

FIG. 5 is a cross-sectional view of an example of a bearing that grinds an inner ring collar with the same grinder.

FIG. 6 is an explanatory view of a grindstone shape.

FIG. 7 is a partial plan view of a conventional grindstone side dresser.

FIG. 8 is a sectional view thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Whetstone axis, 2A, 2B ... Whetstone, 3 ... Main axis, 4 ... Whetstone side dresser, 7 ... Dressing device main body, 9, 10 ... Dress slide, 11, 12 ... Arm pair, 11R, 11L, 12
R, 12L ... Arm, 13R, 13L, 14R, 14L
… Dress tools, 15, 16… Slide guides, AR, A
L, BR, BL ... Inclined surface

Claims (1)

[Claims] 1. A grinder in which two disc-shaped grindstones each having an outer peripheral edge formed in a trapezoidal cross section having inclined surfaces on both sides are coaxially arranged side by side with a small gap between the outer peripheral portions. Two dress slides each having an arm pair to be inserted between each other are provided, and each dress slide has a dress tool that contacts an inclined surface of a grindstone between the arm pair on the inner side surface of one arm of the arm pair. Each arm has a dressing tool that contacts the inclined surface of the adjacent grindstone, and each dress slide can be moved back and forth in the direction along the inclined surface where the dressing tool contacts, and both dress slides are in the circumferential direction of the grindstone. Side dressers on the whetstone that are arranged offset from each other.