JP6275520B2 - Wheel flange structure in grinding equipment - Google Patents

Description

  The present invention relates to a structure of a grindstone flange in a grinding apparatus that grinds a workpiece with a rotating grindstone, and more particularly to a structure in which a multi-surface balancing function is added to a grindstone flange in a grinding apparatus.

Conventionally, the rotation imbalance (unbalance) of a grindstone is corrected by attaching a weight to a correction surface provided on a grindstone flange of a grinding apparatus. For example, when using a grinding machine, when attaching a grindstone to the flange, place the grindstone on a static balance table, and if there is uneven mass in the circumferential direction, the heavy (larger mass) side will turn downward. , To move the fixed position of two or three correction weights fixed to the flange so as to cancel the unevenness, or to change the number and size of correction weights such as screws Thus, the static imbalance is corrected (for example, see Non-Patent Document 1).

Grinder safety must-have (text for special education related to grinding wheel replacement / trial operation)

However, even with the above measures, it is possible to correct the unbalance when stationary and reduce the vibration associated with the rotation of the grinding stone. It is desirable to correct. In other words, because there is a distance between the actual imbalance in the thickness direction of the flange (rotation axis direction of the grindstone) and the object that becomes the weight for correction, the grindstone and the flange are rotated in the surface direction during rotation. The moment to try to work will work. When the grinding wheel is used and the grinding wheel and the flange are driven to rotate with this dynamic imbalance, the vibration of the grinding wheel in the rotational axis direction is easily depicted on the machining surface due to the action of the moment. Also, there is a possibility that the grindstone may come off.
It is clear that the above problems cannot be solved by the countermeasure described in Non-Patent Document 1 described above, and it is desired to develop a technique capable of effectively correcting such dynamic imbalance in the grinding apparatus. .

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a structure of a grindstone flange capable of effectively correcting the dynamic imbalance between the grindstone and the flange in a grinding apparatus.

  The present inventor has tried a structural approach from various viewpoints regarding the wheel flange capable of correcting the above-described dynamic unbalance, and as a result of earnest research, as a result of studying the structure, the present invention relates to a structure of a wheel flange capable of effectively correcting the dynamic unbalance. I came to get various ideas. First, in a grinding apparatus for cutting and grinding a grindstone rotated by a motor into a workpiece, a rotating shaft driven by the motor, a disc-shaped flange supported by the rotating shaft, and an axis of the rotating shaft on the flange A grinding wheel flange structure having a grinding wheel sandwiched from both sides of the direction, and a plurality of weights attached to a local correction surface of the flange to correct a mass imbalance of the grinding wheel and the entire flange, in the axial direction It came to conceive that the weight is attached to at least two or more surfaces having different distances from the grindstone of the flange.

That is, in order to achieve the above object, the grinding wheel flange structure of the present invention is supported by a rotating shaft driven by the motor and the rotating shaft in a grinding apparatus for cutting and grinding a grinding wheel rotated by a motor into a workpiece. A disc-shaped flange, a grindstone sandwiched by the flange from both sides in the axial direction of the rotary shaft, and a mounting surface on the local correction surface of the flange to correct a mass imbalance between the grindstone and the entire flange in grindstone flange structure having a plurality of weights, a grindstone flange structure respectively Ru attaching the plurality of weights which distance is different from at least first and second balancing plane from the grindstone of the flange in the axial direction An annular two-stage rail composed of two stages, an upper stage and a lower stage, is formed on one side of the flange, and each of the annular two-stage rails is different. In the position, the first correction surface weight is positioned and fixed on the upper stage side, and the second correction surface weight is positioned and fixed on the lower stage side, whereby the first correction surface, the second correction surface, Each of the correction surfaces is configured .

Further, in a grinding apparatus for cutting and grinding a grindstone rotated by a motor into a workpiece, a rotating shaft driven by the motor, a disk-shaped flange supported by the rotating shaft, and a shaft of the rotating shaft on the flange A grinding wheel flange structure having a grinding wheel sandwiched from both sides of the direction, and a plurality of weights attached to a local correction surface of the flange to correct a mass imbalance of the grinding wheel and the entire flange, in the axial direction A grindstone flange structure in which the plurality of weights are respectively attached to at least first and second correction surfaces having different distances from the grindstone of the flange, and an annular rail is formed on one side surface of the flange. A set of first correction surface weights each having three or more weights of a predetermined size at different circumferential positions of the rails; The first correction surface and the second correction surface are respectively configured by inserting and fixing one set of weights for the second correction surface with three or more weights larger than the width. And

Further, in a grinding apparatus for cutting and grinding a grindstone rotated by a motor into a workpiece, a rotating shaft driven by the motor, a disc-shaped flange supported by the rotating shaft, and an axis of the rotating shaft on the flange A grinding wheel flange structure having a grinding wheel sandwiched from both sides of the direction, and a plurality of weights attached to a local correction surface of the flange to correct a mass imbalance of the grinding wheel and the entire flange, in the axial direction A grindstone flange structure in which the plurality of weights are respectively attached to at least first and second correction surfaces having different distances from the grindstone of the flange, and an annular rail is formed on one side surface of the flange. A first material portion having a predetermined mass and a second material portion having a mass smaller than the predetermined mass. The combined weight for the first correction surface and the weight for the second correction surface in which the size and the vertical positional relationship of the first material portion and the second material portion are reversed are respectively inserted and fixed. Thus, the first correction surface and the second correction surface are respectively configured.

  ADVANTAGE OF THE INVENTION According to this invention, the structure of the grindstone flange which can correct effectively the dynamic imbalance of a grindstone and a flange can be provided.

It is a schematic diagram of the grindstone flange structure of 1 surface correction as a comparative example of this invention. It is a schematic diagram of the grindstone flange structure of 1 surface correction as other comparative examples of this invention. (A) is a schematic diagram of a grindstone flange structure having a correction surface similar to that of FIG. 1, and (b) is a conceptual diagram (principle diagram) showing a balance of static forces acting on the grindstone flange structure. ). FIG. 5 is a conceptual diagram (principle diagram) showing couple components that are inevitably generated even if the rotating body is rotated to achieve the balancing “one-side balancing”. It is a mimetic diagram of a whetstone flange structure concerning a 1st embodiment of the present invention. It is a schematic diagram of the grindstone flange structure which concerns on the 2nd Embodiment of this invention. It is a schematic diagram of the grindstone flange structure which concerns on the 3rd Embodiment of this invention. It is a schematic diagram of the grindstone flange structure which concerns on the 4th Embodiment of this invention. It is a schematic diagram of the grindstone flange structure which concerns on the 5th Embodiment of this invention. It is a schematic diagram of the grindstone flange structure which concerns on the 6th Embodiment of this invention. It is a conceptual diagram (principle figure) which shows the balance of the moments around a grindstone in the grindstone flange structure shown in FIG. It is a schematic diagram of the grindstone flange structure which concerns on the 7th Embodiment of this invention. It is a figure which shows the grindstone flange structure which concerns on the 8th Embodiment of this invention. It is a figure which shows the example of installation of the groove structure of the grindstone flange which concerns on the 8th Embodiment of this invention. It is a figure which shows the modification of the grindstone flange structure which concerns on the 8th Embodiment of this invention shown in FIG.

First, as a comparative example of the present invention, FIG. 1 shows a schematic diagram of a grindstone flange structure with one surface correction. Note that the “correction surface” here does not mean “surface” at any part of the flange 200, but means physical “surface of mass” at a predetermined axial distance from the grindstone 100. The same applies to the following embodiments.

As shown in FIG. 1, this grinding wheel flange structure is formed by a grinding device (not shown) that cuts and grinds an annular grinding stone 100 rotated by a motor 400 into a workpiece (not shown) by an annular grinding stone 100 and a motor 400. A disk shape that is supported by a grindstone shaft (motor shaft) 402 that is driven to rotate and a grindstone shaft (motor shaft) 402, and holds the inner ring portion of the annular grindstone 100 from both sides in the axial direction of the grindstone shaft (motor shaft) 402. And a plurality of weights 300 attached to the correction surface 210 of the flange 200 in order to correct the unbalance of the mass of the grindstone 100 and the flange 200 as a whole. The weight 300 is inserted and fixed in a rail 333 provided on the flange 200. Reference numeral 250 denotes a screw that tightens the flange 200 that sandwiches the inner ring portion of the grindstone 100 from both sides so that the grindstone 100 does not come off the flange 200. In FIG. 1, two correction weights 300 are used. However, when there are two correction weights 300, if the respective masses are not evenly manufactured, the correction amount 0 cannot be generated, and thus redundancy is added. Therefore, three correction weights may be used.

  FIG. 2 shows a grindstone flange structure with one surface correction as another comparative example of the present invention. As shown in FIG. 2, a plurality of screw holes 204 are provided on the same circumference of the correction surface 220 of the flange 200 so as to be equidistant or symmetrical with respect to the rotation axis (grindstone axis) 402 (see FIG. 1). A set screw 302 having a thickness adjusted with a file or the like can be inserted and fixed as a weight for correcting unbalance. In FIG. 2, the motor 400 and the grindstone shaft (motor shaft) 402 are not shown. Reference numeral 270 denotes the peripheral surface of the flange 200.

In any of the comparative examples shown in FIGS. 1 and 2, the correction surface 210 or the correction surface 220 created by these contributes to the improvement of the “static balance” described in the background art section of this specification. is there. This operation can improve the mass imbalance around the axis and create a static force balance as shown in FIG. 3A is a schematic diagram of a grindstone flange structure having a correction surface 210 similar to that of FIG. 1, and FIG. 3B is a balance of static forces acting on the grindstone flange structure. It is a conceptual diagram (principle figure) which shows. In FIG. 3A, the aspect ratio of the dimensions of the grindstone 100 and the flange 200 is slightly different from that of FIG. However, in the grindstone flange structure shown in FIGS. 1 and 2, the couple component shown in FIG. 4 that does not appear in the static balance cannot be canceled. That is, since the grindstone flange structure shown in FIG. 1 has only one correction surface 210, only a plurality of weights 300 having substantially the same position in the axial direction are used. Even if the “plane balance” is achieved, the couple component as shown in FIG. 4 cannot be canceled. In addition, since the grindstone flange structure shown in FIG. 2 has only one correction surface 220, only the set screws 302 as a plurality of weights having the same position in the axial direction are used. Even if the “one-side balance” is achieved, the couple component as shown in FIG. 4 cannot be canceled.

Therefore, in order to eliminate the couple component as shown in FIG. 4 and achieve not only a static moment but also a dynamic moment balance, the inventor of the present invention has a grindstone in the axial direction of the flange 200 described above. It has been found that a plurality of weights may be attached to the first and second correction surfaces having different distances from 100, respectively. That is, the flange 200 is provided with the first correction surface 210 and the second correction surface 220, and the first correction surface 210 and the second correction surface 220 are separated from the grindstone 100 in the axial direction of the flange 200. It is possible to adjust the balance of the mass in the axial direction by forming a plurality of weights 300 and 302 in the first correction surface 210 and the second correction surface 220, respectively, formed at different positions.

From this point of view, the above-described correction surface 210 shown in FIG. 1 and the correction surface 220 shown in FIG. 2 are combined, and a plurality of weights 300 and (set screws) 302 are inserted into the correction surface 210 and the correction surface 220 shown in FIG. An embodiment (not shown) for adjusting the balance is conceivable.

However, more desirably, the first correction surface 210 and the second correction surface 220 are provided on both sides of the flange 200 in the axial direction across the grindstone 100 so as to more effectively achieve a balance of dynamic moments. Can be considered.

  Therefore, the present inventor first considered providing two correction surfaces (balance surfaces) 211 and 221 on both sides having a distance in the axial direction with the grindstone 100 sandwiched in the grindstone flange 200. The grindstone flange structure according to the first embodiment of the present invention is shown in FIG. That is, as shown in FIG. 5, the grinding wheel flange structure of this embodiment is a grinding device (not shown) for cutting and grinding an annular grinding stone 100 rotated by a motor (not shown) into a workpiece (not shown). Annular grindstone 100, a grindstone shaft (not shown) that is rotationally driven by a motor, and a grindstone shaft (motor shaft) are supported on the inner ring portion of the annular grindstone 100 in the axial direction of the grindstone shaft (motor shaft). It has a disc-shaped flange 200 sandwiched from both sides. In addition, the grindstone flange structure of the present embodiment includes a set screw 302 as a plurality of weights attached to the first correction surface 211 of the flange 200 in order to correct the mass imbalance of the grindstone 100 and the entire flange 200, and the flange 200. The first correction surface 211 includes a plurality of set screws 302 as weights attached to a second correction surface 221 formed on the opposite flange surface across the grindstone 100. As shown in FIG. 5, a plurality of screw holes 204 are formed on the same circumference of the first correction surface 211 of the flange 200 so as to be equidistant or symmetrical with respect to the rotation axis (grinding stone axis). In the second correction surface 221, a plurality of screw holes 204 are formed on the same circumference from the side opposite to the first correction surface 211 so as to be equally spaced or symmetrical with respect to the rotation axis (grinding stone axis). . In addition, the set screw 302 whose length is adjusted with a file or the like can be inserted and fixed as a weight for correcting unbalance in the plurality of screw holes 204 in the same manner as shown in FIG. In FIG. 5, the motor 400 and the grindstone shaft (motor shaft) 402 are not shown.

According to the grindstone flange structure according to the first embodiment of the present invention, the balance of the mass in the axial direction can be adjusted, so the couple component as shown in FIG. In addition, a dynamic moment balance can be achieved. Therefore, not only the static imbalance can be corrected and the vibration accompanying the rotation of the grindstone 100 can be reduced, but also the dynamic imbalance can be corrected and the vibration accompanying the rotation of the grindstone 100 can be further suppressed.

  In the grindstone flange structure according to the first embodiment, a room for operation is given to the replacement side operated by the user. It goes without saying that the correction surfaces 211 or 221 on both sides or one side may be made by a method using the rail 333 shown in FIG. 1 and a correction piece set which can be moved and fixed therein. Needless to say, the set screw 302 as a weight may be provided on either the moving side flange or the fixed side flange.

However, when this first embodiment is employed in a grindstone flange of a grinding apparatus, there is a problem that it is difficult to work if there is one correction surface on the machine side such as a motor that rotates the grindstone. That is, when a plurality of unbalance correction surfaces are provided separately on the grindstone shaft and the grindstone flange side on which the grindstone is to be rotated, the motor side of the grindstone shaft is generally a part that is adjusted by the machine user side and is not normally used by the user. However, a grinding machine usually has a motor or a mechanism that transmits power from the motor on one side. The motor or the housing of the mechanism and other peripheral mechanisms often get in the way. Therefore, in the grindstone flange structure of the second embodiment of the present invention, in addition to providing two correction surfaces (balancing surfaces) 211 and 222 on both sides of the grindstone 100, a correction surface on the motor side is provided. 222 is protruded from the size of the housing 404 of the motor 400 (see FIG. 1) to facilitate the operation (screwing) of the set screw 302 as a correction weight. This schematic diagram is shown in FIG. That is, in the grindstone flange structure of the second embodiment, the second correction surface 222 formed on the flange surface opposite to the first correction surface 211 of the flange 200 with respect to the grindstone 100 is shown in FIG. Unlike the second correction surface 221 of the first embodiment, the diameter is large enough to protrude from the size of the housing 404 of the motor 400 (see FIG. 1). A plurality of screw holes 204 are formed in the protruding portion. Accordingly, since the housing 404 of the motor 400 (see FIG. 1) does not get in the way, the set screw 302 as a correction weight is operated (screwed) into the screw hole 204 formed in the second correction surface 222. Therefore, a great advantage is obtained in that the efficiency of the balancing work is improved.

Furthermore, as an improvement of the first and second embodiments described above, the grindstone flange structure of the third embodiment configured to be able to be corrected from the outside of the circumference, particularly with respect to the correction surface on the motor 400 side, is shown in FIG. Show. That is, in the grindstone flange structure of the third embodiment, the circumferential surface 270 (see FIG. 3) that is opposite to the first correction surface 211 of the flange 200 and that is opposite to the first correction surface 211. ) Is configured with a second correction surface 223. Unlike the second correction surface 222 of the second embodiment shown in FIG. 6, the diameter of the peripheral surface 270 on which the second correction surface 223 is configured is the housing of the motor 400 (see FIG. 1). It is only slightly larger than the size of 404. However, since a plurality of screw holes 204 are formed on the peripheral surface 270 side, a set screw 302 as a correction weight is operated (screwed) in the screw holes 204 formed in the second correction surface 223. The housing 404 of the motor 400 (see FIG. 1) does not get in the way when performing the operation. Therefore, as in the second embodiment, the efficiency of the balancing operation is improved, and the diameter of the peripheral surface 270 on which the second correction surface 223 is formed is the same as that of the motor 400 (see FIG. 1). Since it is only slightly larger than the size of the body 404, there is an advantage that the mass and cost of the entire flange 200 can be saved.

Next, as the fourth and fifth embodiments of the present invention, especially when the motor 400 (see FIG. 1) side cannot be used, unlike the second and third embodiments described above, the grindstone 100 is not sandwiched on one side. FIGS. 8 and 9 show the structure of a grindstone flange in which two correction surfaces (balanced surfaces) 224 and 234 having an axial distance are provided at the center of the flange 200. In these 4th and 5th embodiment, when the one correction surface (balanced surface) 211 provided in the peripheral part of the flange 200 of the one side in 2nd and 3rd embodiment mentioned above is used as the 1st correction surface. As shown in FIGS. 8 and 9, second and third correction surfaces (balanced surfaces) 224 and 234 having an axial distance from the first correction surface 211 are further provided. .

First, in the grindstone flange structure of the fourth embodiment, as shown in FIG. 8, as in the second and third embodiments described above, the first correction surface 211 is formed on the peripheral portion of the flange 200 on one side. Is configured. In addition, the second correction surface 224 and the third correction surface 234 are arranged at the center of the flange 200 on one side of the grindstone 100 so as to have an axial distance from each other and the first correction surface 211. Has been. Thus, in the grindstone flange structure of the fourth embodiment, the first correction surface 211, the second correction surface 224, and the third correction surface 234 are mutually connected to the flange 200 on one side of the grindstone 100 from the grindstone 100. The first correction surface 211, the second correction surface 224, and the third correction surface 234 are provided in this order in order of increasing axial distance from the grindstone 100. .

As described above, since the three correction surfaces having different distances from each other in the axial direction from the grindstone 100 are provided, a set screw as a correction weight is provided in a part of the plurality of screw holes 204 formed in each correction surface. By screwing 302, the dynamic moment acting in the axial direction can be adjusted in three stages. Needless to say, it is possible to omit the installation / use of one of the three surfaces.

Further, in the grindstone flange structure of the fourth embodiment shown in FIG. 8, a small-diameter cylindrical portion 224s is formed at the center of the flange 200 on one side of the grindstone 100, and a step formed by the small-diameter cylindrical portion 224s is used. A set screw 302 as a correction weight is easily screwed into a part of the plurality of screw holes 204 formed in the second correction surface 224. Note that the positions of the plurality of screw holes 204 corresponding to the correction locations on the second correction surface 224 and the third correction surface 234 are concentrically arranged as shown in FIG. The same number of correction surfaces 234 are formed, and the radial distance from the rotating shaft of the grindstone is the same. In contrast, the positions of the plurality of screw holes 204 on the second correction surface 224 and the third correction surface 234 are different from the positions of the plurality of screw holes 204 on the first correction surface 211 from the rotation axis of the grindstone. Are different (closer) in the radial distance.

Next, in the grindstone flange structure of the fifth embodiment, as shown in FIG. 9, as in the second, third, and fourth embodiments described above, the peripheral portion of the flange 200 on one side has the first The correction surface 211 is configured. In addition, a second correction surface 225 and a third correction surface 235 are arranged at the center of the flange 200 on one side of the grindstone 100 so as to have an axial distance from each other and the first correction surface 211. Has been. Thus, in the grindstone flange structure of the fifth embodiment, the first correction surface 211, the second correction surface 225, and the third correction surface 235 are mutually connected to the flange 200 on one side of the grindstone 100 from the grindstone 100. The first correction surface 211, the second correction surface 225, and the third correction surface 235 are provided in this order in order of increasing axial distance from the grindstone 100. . As described above, since the three correction surfaces having different distances from each other in the axial direction from the grindstone 100 are provided, a set screw as a correction weight is provided in a part of the plurality of screw holes 204 formed in each correction surface. Similar to the above-described fourth embodiment, the dynamic moment acting in the axial direction can be adjusted in three stages by screwing 302. However, as apparent from a comparison between FIG. 8 and FIG. 9, the ratio of the axial distance between the second correction surface 225 and the third correction surface 235 from the grindstone 100 is the same as that in the fourth embodiment. Unlike the ratio of the distance between the second correction surface 224 and the third correction surface 234 in the axial direction from the grindstone 100, the distance ratio is configured to be larger and the radius of the correction surface 234 is smaller than the correction surface 235. In consideration of this, it is intended that the effect of moment correction can be easily obtained even with the addition of a smaller mass.

In the grindstone flange structure of the fifth embodiment shown in FIG. 9, a large diameter cylindrical portion 225 </ b> L is formed on the proximal end side of the flange 200 on one side of the grindstone 100, and a small diameter cylindrical portion 235 s is formed on the distal end side of the flange 200. And a set screw 302 as a weight for correction can be easily screwed into a part of the plurality of screw holes 204 formed in the second correction surface 225 using the step formed by these. The positions of the plurality of screw holes 204 corresponding to the correction points on the second correction surface 225 and the third correction surface 235 are both concentrically formed as shown in FIG. The second correction surface 225 using the cylindrical portion 225L is formed with a larger number of radial positions than the third correction surface 235 using the small-diameter cylindrical portion 235s. Needless to say, it is possible to arrange the numbers and thin out the numbers for the axes. The positions of the plurality of screw holes 204 on the second correction surface 225 and the third correction surface 235 are the same as the positions of the plurality of screw holes 204 on the first correction surface 211 in the radial direction from the rotation axis of the grindstone. The second correction surface 225 is closer to the first correction surface 211 and the third correction surface 235 is closer to the third correction surface 225 than the first correction surface 211. .

Furthermore, as a sixth embodiment of the present invention, as shown in FIG. 10, screw holes 204A and 204B having different depths are prepared in holes on the same pitch circle, and set screws 302A and 302B having different lengths are prepared. It is also possible to provide a difference in the fixing depth. Thereby, in the grindstone flange structure of the sixth embodiment, the first correction surface 216 and the second correction surface 226 have different axial distances from the grindstone 100 on the flange 200 on one side of the grindstone 100. Configured as follows. That is, the “corrected surface” here does not mean “surface” at any part of the flange 200, but means physical “surface of mass” at different axial distances from the grindstone 100. Therefore, even if the flange 200 is not provided with a stepped shape or the like in this way, it is possible to form mutual holes from the grindstone 100 by forming holes having different depths and screwing different set screws or the like into the holes. It is also possible to construct two correction surfaces 216, 226 having different axial distances. The holes having different depths do not necessarily have to be on the same pitch circle, and the correction amount (the effect of generating centrifugal force) ∝ mr as the radius r and the mass m, so the correction amount is divided by the pitch circle diameter. It may be standardized. In FIG. 10, the two correction surfaces 216 and 226 are provided on the fixed-side flange. However, one or both of the correction surfaces may be on the moving-side flange (the plate side that holds the grindstone). In the present embodiment, as shown in FIG. 11, when it is considered that the moments around the grindstone 100 are balanced, it seems that these cannot be dealt with completely, but it is apparent that it can be dealt with when considering the fixed end. It is. That is, when considering the entire grinding machine, not only can vibrations transmitted to the machine side be greatly reduced, but also the load on the bearings and the like can be greatly reduced.

Furthermore, as a seventh embodiment of the present invention, as shown in FIG. 12, a plurality of correction surfaces having a distance in the axial direction can be provided using a two-stage rail. As shown in FIG. 12, the weight is divided into two parts, the tolerance is controlled, and the weight is fixed by screwing a set screw. Thereby, in the grindstone flange structure of the seventh embodiment, the first correction surface 217 and the second correction surface 227 have different axial distances from the grindstone 100 on the flange 200 on one side of the grindstone 100. Configured as follows. Even if the step shape or the like is not provided on the flange 200 as described above, the two-stage rail 700 having a different depth is formed on the flange 200 and one of the two split weights is inserted into each of the two-stage rails. It is also possible to form two correction surfaces 217 and 227 having different axial distances from the grindstone 100. That is, in the grindstone flange structure of the seventh embodiment, an annular two-stage rail 700 is formed on one side of the flange 200 as shown in FIGS. The two-stage rail 700 can be fixed by press-fitting one of the two divided weights 702 702A or 702B, or both 702A and 702B, and screwing a set screw 702a or 702b. Here, the first correction surface weight 702A is positioned and fixed on the upper stage side of the two-step rail 700, and the second correction surface weight 702B is positioned and fixed on the lower stage side. In this way, one of the two weights 702 divided into the two-stage rail 700 702A or 702B, or both 702A and 702B is press-fitted and fixed by screwing the set screw 702a or 702b, so A first correction surface 217 and a second correction surface 227 having different axial distances can be formed.

Furthermore, as an eighth embodiment of the present invention, as shown in FIG. 13, the one-side correction mechanism shown in FIG. 1 or the like can be used as it is, and an unbalance correction weight used there is shown in FIG. It is also possible to provide a plurality of correction surfaces having a distance in the axial direction by adding slight changes such as providing a taper. That is, in the grindstone flange structure of the eighth embodiment, as shown in FIG. 13, for example, correction of one surface correction in which an annular rail 333 (see also FIG. 1) is provided on one side of the flange 200 (see also FIG. 1). The mechanism is used as it is, and two sets of weights including the weight set 1 and the weight set 2 are inserted into the rail 333. Each weight 802 in the weight set 1 and the weight set 2 is fixed by a screw 805. By arranging the weights 802 having different sizes as the weight set 1 and the weight set 2 in groups of three in the rail 333, it is possible to give a distance in the direction of the rotation axis when fixed with screws 805. . If the weight 802 on the enlarged side is worried about popping out, the weight 802 may be received when centrifugal force is applied using a taper rail 880 for preventing popping out instead of the rail 333 as shown in FIG. Rather than popping out, it can be arranged to be pulled into the back of the rail 880. If there are three or more pairs of weights of the same size, there is redundancy, so even if there are no weights in the same direction, it is possible to express the effect of correcting each surface in phase and phase as a combination of three weights. Is possible.

Further, as a modification of the above eighth embodiment, as shown in FIG. 15, two materials having different masses (for example, steel and aluminum) can be stacked. That is, in the grindstone flange structure of the modified example of the eighth embodiment, as shown in FIG. 15, for example, a one-surface correction correcting mechanism in which an annular rail is provided on one side of the flange 200 (see FIG. 1 etc.) is used as it is. In the rail 333 (see FIG. 1), for example, a weight 802 that is a combination of a material portion 802A made of steel and a larger mass and a material portion 802B made of an aluminum material and a smaller mass is inserted. Fix with screws 805. 15A and 15B, the size of the material portion 802A made of steel and the material portion 802B made of aluminum are reversed. Even in this modification, when the weight 802 is worried about jumping out, instead of the rail 333, if a taper rail 880 for preventing popping out is used and a centrifugal force is applied, the weight 802 is more likely to jump out. Rather, it can be arranged so as to be pulled into the back of the rail 880.

According to the embodiment of the present invention described above, a grinding wheel flange structure capable of effectively correcting the dynamic imbalance between the grinding wheel and the flange is obtained in the grinding apparatus. In the above-described embodiment, two surfaces of the first and second correction surfaces or three surfaces of the third correction surface are provided as the correction surfaces. Needless to say, there may be more than four surfaces in combination. Moreover, although the form which fixes a weight with a set screw was described, the weight fixing method, such as press-fitting the weight itself or fixing with a pin etc., may be arbitrary.

  The present invention can be widely applied to any grinding device (grinding machine) such as screw grinding, cylindrical grinding, or gear grinding as long as the grinding wheel flange structure has a grinding wheel and its flange.

100 grinding wheel, 200 flange, 210 correction surface, 250 screws,
300 spindles, 333 rail, 400 motor, 402 grinding wheel shaft (motor shaft)

Claims (3)

In a grinding apparatus for cutting and grinding a grindstone rotated by a motor into a workpiece, a rotating shaft driven by the motor, a disc-shaped flange supported by the rotating shaft, and an axial direction of the rotating shaft on the flange A grindstone flange structure comprising: a grindstone sandwiched from both sides; and a plurality of weights attached to a local correction surface of the flange in order to correct a mass imbalance between the grindstone and the entire flange; and the flange in the axial direction. wherein a grindstone flange structure respectively Ru attaching the plurality of weights which distance is different from at least first and second balancing plane from the grindstone, the annular consisting upper and lower two stages on one side of said flange A two-stage rail is formed, and a weight for the first correction surface is positioned and fixed on the upper stage side at different circumferential positions of the annular two-stage rail. Together, by so positioning the weight for the second balancing plane on the lower side fixed, the first balancing plane, the grinding wheel flange structure, characterized in that it constitutes the second balancing plane, respectively. In a grinding apparatus for cutting and grinding a grindstone rotated by a motor into a workpiece, a rotating shaft driven by the motor, a disc-shaped flange supported by the rotating shaft, and an axial direction of the rotating shaft on the flange A grindstone flange structure comprising: a grindstone sandwiched from both sides; and a plurality of weights attached to a local correction surface of the flange in order to correct a mass imbalance between the grindstone and the entire flange; and the flange in the axial direction. A grindstone flange structure in which the plurality of weights are attached to at least the first and second correction surfaces having different distances from the grindstone, and an annular rail is formed on one side of the flange. In each of the different circumferential positions, there are three or more weights of a predetermined size and one set of weights for the first correction surface, the predetermined size The first correction surface and the second correction surface are respectively configured by inserting and fixing one set of weights for the second correction surface each having three or more larger weights. Whetstone flange structure. In a grinding apparatus for cutting and grinding a grindstone rotated by a motor into a workpiece, a rotating shaft driven by the motor, a disc-shaped flange supported by the rotating shaft, and an axial direction of the rotating shaft on the flange A grindstone flange structure comprising: a grindstone sandwiched from both sides; and a plurality of weights attached to a local correction surface of the flange in order to correct a mass imbalance between the grindstone and the entire flange; and the flange in the axial direction. A grindstone flange structure in which the plurality of weights are attached to at least the first and second correction surfaces having different distances from the grindstone, and an annular rail is formed on one side of the flange. A first material portion having a predetermined mass and a second material portion having a mass smaller than the predetermined mass at the first circumferential position of The first correction surface weight and the second correction surface weight in which the size and the vertical positional relationship of the first material portion and the second material portion are reversed are respectively inserted and fixed. Thus, the grindstone flange structure is characterized in that the first correction surface and the second correction surface are respectively configured.

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