JP2006000963A - Dressing method in centerless grinding machine, and centerless grinding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dressing method in a centerless grinding machine omitting the disposition of a rotary dressing device causing size enlargement and a cost increase, and also to provide the centerless grinding machine. <P>SOLUTION: In this dressing method in the centerless grinding machine A, a mount 2 mounted with a grinding wheel 4 having a grinding tool 11, and a mount 3 mounted with an adjusting wheel 5 having an adjusting grinding tool 15, are disposed facing each other, and a workpiece W on a blade disposed between the mounts 2, 3 is ground by the rotary grinding force of the grinding tool 11. The adjusting wheel 5 is provided with a rotary dresser 16 rotated together with the adjusting grinding tool 15 to dress the grinding tool 11. The grinding tool 11 is dressed by the movement of a slitting direction advancing/retreating means and a lateral advancing/retreating means of the mounts in the centerless grinding machine A, and by the rotary dresser 16 of the adjusting wheel 5, and the adjusting grinding tool 15 of the adjusting wheel is dressed with the grinding tool 11 of the grinding wheel 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dressing (truing) method for correcting the surface state and shape of a grinding wheel or adjusting wheel in a centerless grinding machine, and a centerless grinding machine.

  The means for dressing the grinding wheel of the grinding wheel and the adjustment wheel of the adjustment wheel in the centerless grinding machine are the means for removing the grinding wheel and the adjustment wheel from the mounting base and dressing by the external correction machine, and the back of each of the grinding wheel and the adjustment wheel There is a means by a dressing device arranged in a position (for example, Patent Documents 1, 2, and 3).

Japanese Examined Patent Publication No. 63-28749

Japanese Patent Publication No. 3-37886 (reference numerals 13, 17) JP 2001-179623 A

The centerless grinder provided with the dressing devices for the grinding wheel and the adjusting grindstone is generally large, and in the case of a small centerless grinder, the placement of the dressing device is structurally and economically burdensome.
In addition, since the grinding wheel becomes smaller in diameter when it is configured in a small size, it is frequently consumed and replaced frequently. Therefore, there is a tendency to use a superabrasive grindstone such as a CBN grindstone or a diamond grindstone because the life of the grindstone needs to be extended. .
However, the dressing of these hard whetstones must be supported by a hard dresser, and from the viewpoint of durability, a rotary type, that is, a rotary diamond dresser is suitable instead of a single stone shape. However, it becomes complicated and large, and is not suitable for a small centerless grinding machine.

  In view of the above, the present invention intends to provide a dressing method using a centerless grinder and a centerless grinder that omits the provision of a large-sized and expensive rotary dressing apparatus.

  A dressing method in a centerless grinding machine that solves the above-described problem is that a mounting base to which a grinding wheel having a grinding wheel is attached and a mounting base to which an adjustment wheel having an adjustment wheel are attached are arranged to face each other. In a centerless grinding machine that grinds the workpiece on the blade provided by the rotational grinding force of the grinding wheel, the mounting base moves by the cutting direction advance / retreat means and the lateral advance / retreat means, and the adjustment wheel The grinding wheel is dressed by a rotary movement of a rotary dresser arranged in parallel with the adjusting wheel, and the adjusting wheel of the adjusting wheel is dressed by the grinding wheel of the grinding wheel. As a second means, the adjusting wheel of the adjusting wheel is dressed by a rotary dresser arranged in parallel with the grinding wheel of the wheel. Than it is.

  In the centerless grinding machine employing the above method, a mounting base to which a grinding wheel having a grinding wheel is attached and a mounting base to which an adjustment wheel having an adjustment wheel are attached are arranged to face each other. In a centerless grinder that grinds a workpiece on a blade by the rotational grinding force of the grinding wheel, the adjustment wheel includes a rotary dresser that rotates with the adjustment wheel and dresses the grinding wheel. As a second means, the grinding wheel is provided with a rotary dresser that rotates together with the grinding wheel provided on the grinding wheel to dress the adjusting wheel.

  A dressing method and a centerless grinder in a centerless grinder according to the present invention are provided in parallel with an adjusting grindstone, and a grindstone having a mounting wheel of an adjusting wheel provided with a rotary dresser that rotates together with the adjusting grindstone and a grindstone. The vehicle mounting base is relatively controlled and moved by the cutting direction advance / retreat means and the lateral advance / retreat means, and the grinding wheel of the grinding wheel is adjusted by the rotary dresser of the adjustment wheel, and the adjustment wheel of the adjustment wheel is adjusted by the grinding wheel of the grinding wheel It is characterized by dressing the grinding wheel, and the grinding wheel is also arranged in parallel with the grinding wheel so that the adjustment wheel of the adjustment wheel is dressed by the rotary dresser of this grinding wheel. Since there is no need for a separate rotary dressing device for dressing hard wheels, the centerless grinding machine can be downsized. , It is also becomes economical and low cost since it is a simple structure.

  The drawings show an embodiment of the dressing method and the centerless grinder in the centerless grinder according to the present invention.

  Here, truing for adjusting the outer peripheral surface shape of the grinding wheel (adjusting wheel) and dressing for adjusting the condition of the surface of the grinding wheel are referred to as dressing, and a truer or dresser as a correction tool is referred to as a dresser.

  1 and 2 are schematic views of the centerless grinding machine in this example. The centerless grinding machine A includes a pair of mounting bases 2 and 3 provided on the machine base 1 and a mounting base 2 and 3 respectively. The grinding wheel 4 and the adjustment wheel 5 mounted in a state of being opposed to each other, the grinding table 6 disposed therebetween, and the blade 7 that is supported by the grinding table 6 and on which the workpiece W is placed. Has been.

  The grinding wheel 4 and the adjusting wheel 5 are so-called shaft-fixed grinding wheel units. The grinding wheel 4 is a rotating cylindrical body on the outer periphery of an axle 8 (grinding wheel axle) via a bearing 9 such as thrust, radial, or slip. 10 is externally fitted, and on the outer periphery of the rotary cylinder 10, a pulley 10a for rotational movement is provided near one end, and a grinding stone 11 is provided around the central portion.

  The adjusting wheel 5 is also configured in the same manner as the grinding wheel 4, and a rotating cylinder 14 is fitted on the outer periphery of the axle 12 (adjusting axle) via a bearing 13. An adjustment grindstone 15 is provided around the center of the pulley portion 14a. Further, in this adjustment wheel 5, a disk-like rotary having a diamond correcting blade provided around the other end of the rotating cylinder 14. A rotary dresser 16 of the shape is fixed in parallel with a gap in the state of being coaxial with the adjusting grindstone 15, both end portions of the grinding wheel axle 8 are attached to the mounting base 2, and both end portions of the adjusting axle 12 are attached to the mounting base 3. In addition, it is fixedly attached to both sides.

  Each of the mounting bases 2 and 3 includes a pair of support portions 17 and 17, and each of the support portions 17 and 17 is provided on a receiving side 17 a having an upward semicircular receiving portion and a lid side 17 b having a downward semicircular receiving portion. Each of the two end portions of the axle 8 of the grinding wheel 4 and the axle 12 of the adjusting wheel 5 is clamped by bolts 18 in a state of being sandwiched by both semicircle receiving portions of the support portions 17 and 17 from the diameter direction. It is clamped and fixed to both ends.

  Each of the grinding wheel 4 and the adjustment wheel 5 is provided between the pulleys 10a and 14a of the rotary cylinders 10 and 14 and the pulleys 19a and 20a of the motors 19 and 20 disposed on the mounting bases 2 and 3, respectively. The grinding wheel 4 and the adjustment wheel 5 loosen the bolts 18 of the support portions 17 and 17 and remove the belt 21. Therefore, it can be easily removed from the mounting bases 2 and 3.

  Further, the mounting base 2 of the grinding wheel 4 and the mounting base 3 of the adjustment wheel 5 are moved in directions orthogonal to the respective axles 8 and 12 during grinding by screw shafts 23a and 23b rotated by drive motors 22a and 22b. In the present example, the mounting base 2 on the grinding wheel 4 side is provided with cutting direction advance / retreat means for cutting the workpiece W and, in this example, either or both of the mounting bases 2 and 3. It is provided with a lateral advance / retreat means for moving the mounting base 2 in parallel with the axis of the axle 8 by means of a screw shaft 25 rotated by a drive motor 24. The lateral mounting of the mounting base 2 on the grinding wheel 4 side is provided. In place of the moving means, a lateral advancing / retreating means for moving the mounting base 3 on the other adjustment wheel 5 side in parallel with the axle 12 by a screw shaft 25a rotated by a drive motor 24a, or both lateral advancing / retreating means are provided. It may be added.

  The centerless grinding machine A places the workpiece W on the blade 7 and rotates the grinding wheel 4 and the adjustment wheel 5 from the motors 19 and 20 of the mounting bases 2 and 3 via the belt 21 and drives them. The peripheral surface of the workpiece W is sharpened by the rotational grinding force of the grinding wheel 11 in the grinding wheel 4 while controlling the mounting bases 2 and 3 in the cutting direction by the screw shafts 23a and 23b rotated by the motors 22a and 22b. It is.

  When the blade 7 interferes with the rotary dresser 16 in dressing (truing) for correcting the surface state and shape of the grinding wheel 11 of the grinding wheel 4 and the adjustment wheel 15 of the adjustment wheel 5, the blade 7 is moved. To do.

The grinding wheel 11 is dressed in the grinding wheel 4 (FIG. 4). A rotary dresser 16 arranged in parallel with the adjusting wheel 15 of the adjusting wheel 5 is adjusted by a motor 20 provided on the mounting base 3 to adjust the grinding wheel. 15 and the axle 12 as a center of rotation. The mounting table 2 on the grinding wheel 4 side with respect to the rotary dresser 16 is driven by a drive motor 22a and a screw shaft 23a in a cutting direction advance / retreat means, and a lateral direction. The movement of the drive motor 24 and the screw shaft 25 in the advancing / retreating means is controlled by NC control and the like, and the peripheral surface of the grinding wheel 11 is dressed in a desired shape and surface state. In this case (FIG. 5), the grinding wheel 11 side of the grinding wheel 4 is moved from the grinding wheel 11 of the grinding wheel 4 to the adjustment wheel 15 by the dressing of the grinding wheel 11. Performing operations and by controlling the movement as well in the.
Further, in the aspect in which the drive motor 24 a and the laterally moving means by the screw shaft 25 a are arranged on the mounting base 3 on the adjustment wheel 5 side, the mounting base 3 with respect to the grinding wheel 11 of the grinding wheel 4. There are also means for dressing the grinding wheel 11 and the adjustment wheel 15 by controlling the movement, and means for using both the cutting direction advancing / retreating means and the lateral advancing / retreating means of the mounting bases 2 and 3 together.

Further, similarly to the configuration of the adjusting wheel 5, a rotary dresser 16a is fixed in parallel to the rotary cylinder 10 of the grinding wheel 4 in a state of being coaxial with the grinding wheel 11 (FIGS. 3 and 6). There is also means for dressing the adjusting grindstone 15 of the adjusting wheel 5 by the rotary dresser 16a of the car 4, which is suitable when the peripheral surface of the grindstone is stepped or the like and it is difficult to use the grinding grindstone 11 as a dresser. .
Further, the adjusting grindstone 15 has means for dressing with a bite type dressing tool attached to the grinding wheel side mounting base 2.

The grinding wheel 4 and the adjustment wheel 5 in this embodiment are so-called fixed shaft type grinding wheel units as described above, but of course the same applies to the axial rotation type grinding wheel unit.
FIG. 7 shows a dual-supporting type shaft rotating system grindstone unit (according to the adjustment wheel example). A support cylinder 43 is attached to each part of the adjustment wheel 40 near one end and the other end via a bearing 42. An adjusting grindstone 44 and a rotary dresser 45 are coaxially fixed in parallel to each other on the axle 41 between the support cylinders 43 and 43 with a gap therebetween. The wheel 46 is fixed, and the adjusting grindstone 44 and the rotary dresser 45 are fixed to both ends of the support cylinders 43, 43 of the axle 41 by the support portions 17, 17 of the mounting base 3. The worm wheel 46 is rotated together with the axle 41 in a state where the worm wheel 46 is engaged with the worm 47 from the drive source.

FIG. 8 shows a cantilever type shaft rotating system grindstone unit (50 adjustment wheels), and a flange 53 is fixed to an end of an axle 51 that is supported by a support portion 17 of a mounting base 3 via a bearing 52. A pulley (not shown) is connected to a driving source fixed to the other end of the axle 51, with the adjusting grindstone 54 and the rotary dresser 55 being fixed in parallel with a gap on the outer periphery of the flange 53. It is rotated through.
It should be noted that a cantilever-type shaft-fixed grindstone unit can also be inferred from the forms of FIGS.

FIGS. 9 and 10 show other examples of centerless grinders, and members having the same functions as those of the centerless grinder A are denoted by the same reference numerals and redundant description is omitted.
The centerless grinder B shown in FIG. 9 is not provided with a cutting direction advancing / retreating means of the mounting base 2 on the grinding wheel 4 side in the centerless grinder A, and is laterally advanced / retracted by the drive motor 24 and the screw shaft 25. The mounting base 3 on the side of the adjustment wheel 5 having only the means and having the rotary dresser 16 moves forward and backward in the direction of the grinding wheel 11 of the grinding wheel 4 opposed by the drive motor 22x and the screw shaft 23x. 60 is arranged in such a manner that it includes a drive motor 22b in the direction of the blade 7 on which the workpiece W placed on the cutting slide plate 60 is placed and a screw shaft advancing / retreating means by a screw shaft 23b. Therefore, the movement of the cutting slide plate 60 has the same action as the cutting direction advance / retreat means of the grinding wheel 4 side mounting base 2 in the centerless grinding machine A.

  The centerless grinding machine C shown in FIG. 10 is a fixed form in which the cutting direction advance / retreat means and the lateral advance / retreat means are not provided on the mounting base 2 on the grinding wheel 4 side, and the adjustment wheel 5 having the rotary dresser 16. The side is provided with a lateral sliding plate 61 that moves forward and backward in the direction parallel to the axle 8 of the grinding wheel 4 facing the drive motor 24Z and the screw shaft 25Z. A mounting base 3 and a blade 7 having a cutting slide 60 and a cutting direction advance / retreat means are disposed. The movement of the horizontal sliding plate 61 and the cutting slide 60 is the centerless grinding. It has the same action as the cutting direction advance / retreat means and the lateral direction advance / retreat means of the grinding wheel 4 side mounting base 2 in the board A.

  The dressing method and the centerless grinder in the centerless grinder according to the above embodiment are arranged in parallel with the adjusting grindstone in a coaxial state, and a grindstone having an adjusting wheel mounting base equipped with a rotary dresser that rotates together with the adjusting grindstone and the grindstone. The vehicle mounting base is relatively controlled and moved by the cutting direction advance / retreat means and the lateral advance / retreat means, and the grinding wheel of the grinding wheel is adjusted by the rotary dresser of the adjustment wheel, and the adjustment wheel of the adjustment wheel is adjusted by the grinding wheel of the grinding wheel It is characterized by dressing the grinding wheel, and the grinding wheel is also arranged in parallel with the grinding wheel so that the adjustment wheel of the adjustment wheel is dressed by the rotary dresser of this grinding wheel. Since there is no need for a separate rotary dressing device for hard grinding stone dressing, the centerless grinding machine can be downsized. It is also become economical and low cost since it is a simple structure.

The schematic front view of a centerless grinding machine. The schematic plan view of a centerless grinding machine. Sectional drawing which shows the attachment state of an adjustment wheel and a grinding wheel. The simplification figure which shows the dressing state of a grinding wheel. The simplification figure which shows the dressing state of an adjustment grindstone. The simplified diagram which shows the dressing state of another example adjustment grindstone. Sectional drawing of the both-ends type shaft rotation type grindstone unit of the adjustment vehicle example. Sectional drawing of the cantilever type axis | shaft rotation type grindstone unit of the adjustment wheel example. Another example of a centerless grinding machine. Another example of a centerless grinding machine.

Explanation of symbols

A, B, C Centerless grinding machine W Work material 1 Machine base 2, 3 Mounting base 4 Grinding wheel 5 Grinding base 7 Blade 8 Axle (grinding wheel axle)
11 Grinding wheel 12 Axle (adjusting axle)
15 Adjusting wheel 16 Rotary dresser 17 Support portions 22a, 22b, 24 Drive motors 23a, 23b, 25 Screw shaft

Claims (5)

  A mounting base to which a grinding wheel having a grinding wheel is attached and a mounting base to which an adjustment wheel having an adjustment wheel are attached are arranged to face each other, and a workpiece on the blade disposed therebetween is used as the grinding wheel. In a centerless grinder that performs grinding with the rotational grinding force of the rotary wheel, a rotary dresser that is arranged in parallel with the movement of the mounting base by means of cutting direction advance / retreat means and lateral direction advance / retreat means and coaxial with the adjusting wheel of the adjusting wheel. A dressing method in a centerless grinder characterized by dressing the grinding wheel.   The dressing method in the centerless grinding machine according to claim 1, wherein the adjusting wheel of the adjusting wheel is dressed by a grinding wheel of the grinding wheel.   2. The dressing method for a centerless grinding machine according to claim 1, wherein the adjustment grindstone of the adjustment wheel is dressed by a rotary dresser arranged in parallel with the grinding wheel of the grinding wheel.   A mounting base to which a grinding wheel having a grinding wheel is attached and a mounting base to which an adjustment wheel having an adjustment wheel are attached are arranged to face each other, and a workpiece on the blade disposed therebetween is used as the grinding wheel. A centerless grinding machine that performs grinding with a rotational grinding force of the centerless grinding machine, wherein the adjusting wheel includes a rotary dresser that rotates together with the adjusting grinding wheel to dress the grinding wheel. The centerless grinding machine according to claim 4, wherein the grinding wheel includes a rotary dresser that rotates together with the grinding wheel to dress the adjusting wheel.

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