Grinding wheel dressing method

Abstract

To provide a grinding wheel dressing method capable of improving accuracy of a hollow shape imparted to an internal tooth shape grinding wheel.SOLUTION: A grindstone dressing method includes forming a tooth surface shape of a cylindrical internal tooth profile grindstone with a columnar dressing gear by causing a central axis of the internal tooth profile grindstone and a central axis of the dressing gear to intersect at a first angle, and forming a tooth tip shape of the internal tooth profile grindstone with a cylindrical dressing roll having a diameter larger than a TIF diameter of the dressing gear by causing the central axis of the internal tooth profile grindstone and a central axis of the dressing roll to intersect at a second angle different from the first angle.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a grinding wheel dressing method. [Background technology]

[0002] Patent Document 1 describes that a dressing gear meshes with and slides against the internal teeth of a honing stone to dress the tooth surface, and a dressing ring dresses the tips of the internal teeth of the honing stone. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-205026 Summary of the Invention [Problem to be solved by the invention]

[0004] The larger the diameter of the dressing roll, the longer its lifespan. Furthermore, the same dressing roll may be used for gear machining with different specifications. Therefore, the TIF diameter of the dressing gear may differ from the diameter of the dressing roll, resulting in a hollow shape at the tip of the internally toothed grinding wheel that differs from the desired shape.

[0005] The present disclosure has been made in consideration of the above, and aims to provide a grinding wheel dressing method that can improve the accuracy of the hollow shape imparted to an internal tooth grinding wheel. [Means for solving the problem]

[0006] The grinding wheel dressing method of the present disclosure involves intersecting the central axis of a cylindrical internally toothed grinding wheel with the central axis of a cylindrical dressing gear at a first angle to form the tooth surface shape of the internally toothed grinding wheel using the dressing gear, and intersecting the central axis of the internally toothed grinding wheel with the central axis of a cylindrical dressing roll having a diameter larger than the TIF diameter of the dressing gear at a second angle different from the first angle to form the tooth tip shape of the internally toothed grinding wheel using the dressing roll.

[0007] The grinding wheel dressing method of the present disclosure involves intersecting the central axis of a cylindrical internally toothed grinding wheel with the central axis of a cylindrical dressing gear at a first angle to form the tooth surface shape of the internally toothed grinding wheel using the dressing gear, and intersecting the central axis of the internally toothed grinding wheel with the central axis of a barrel-shaped dressing roll whose diameter is larger than the TIF diameter of the dressing gear at the first angle to form the tooth tip shape of the internally toothed grinding wheel using the dressing roll. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to realize a grinding wheel dressing method that can improve the accuracy of the hollow shape imparted to an internal tooth grinding wheel. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a grindstone dressing device. [Figure 2] FIG. 2 is a diagram showing the positional relationship between the internal tooth grinding wheel and the dress gear. [Figure 3] FIG. 3 is a diagram showing the positional relationship between the internal tooth grinding wheel and the dressing roll. [Figure 4] FIG. 4 is a diagram showing the hollow shape given to the internal tooth grinding wheel. [Figure 5] FIG. 5 is a diagram showing the positional relationship between the internal tooth grinding wheel and the dressing roll. DETAILED DESCRIPTION OF THE INVENTION

[0010] A grinding wheel dressing method according to an embodiment of the present disclosure will be described with reference to the drawings. Note that the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially identical.

[0011] (Embodiment 1) 1 is a diagram showing a schematic configuration of a grindstone dressing device 1. The grindstone dressing device 1 includes an internally toothed grindstone 2, a dressing gear 3, and a dressing roll 4 (see FIG. 3).

[0012] The grinding wheel dressing device 1 dresses the internally toothed grinding wheel 2 using a dressing gear 3 and a dressing roll 4. Specifically, the grinding wheel dressing device 1 shapes the tooth surface and tooth tip shape of the internally toothed grinding wheel 2 using the dressing gear 3 and the dressing roll 4, and restores the sharpness of the internally toothed grinding wheel 2 whose sharpness has deteriorated due to clogging or the like.

[0013] The internally toothed grinding wheel 2 is cylindrical and has a plurality of grinding wheels protruding in the shape of teeth formed on the inside. The internally toothed grinding wheel 2 grinds a gear-shaped workpiece such as a gear.

[0014] The dressing gear 3 has a cylindrical shape. The dressing gear 3 forms the tooth surface shape of the internally toothed grinding wheel 2.

[0015] The dressing roll 4 is cylindrical and has a diameter larger than the TIF (True Involute Form) diameter of the dressing gear 3, and forms the tooth tip shape of the internal tooth grinding wheel 2.

[0016] Fig. 2 is a diagram showing the positional relationship between the internally toothed grinding wheel and the dress gear. Fig. 2 is a view seen from the direction of arrow A in Fig. 1. As shown in Fig. 2, the central axis A1 of the internally toothed grinding wheel 2 and the central axis A2 of the dress gear 3 intersect at a first angle θ1, and the tooth flank shape of the internally toothed grinding wheel 2 is formed by the dress gear 3. In other words, the intersecting angle between the internally toothed grinding wheel 2 and the dress gear 3 is the first angle θ1.

[0017] FIG. 3 is a diagram showing the positional relationship between the internal tooth grinding wheel and the dressing roll. Similar to FIG. 2, FIG. 3 is a view seen from the direction of arrow A in FIG. 1. As shown in FIG. 3, the central axis A1 of the internal tooth grinding wheel 2 and the central axis A3 of the dressing roll 4 intersect at a second angle θ2 different from the first angle θ1, and the tooth tip shape of the internal tooth grinding wheel 2 is formed by the dressing roll 4. In other words, the intersecting angle between the internal tooth grinding wheel 2 and the dressing roll 4 is the second angle θ2. The second angle θ2 can be determined from the hollow shape of the dressing gear 3 due to the TIF diameter.

[0018] FIG. 4 is a diagram showing the hollow shape imparted to the internal tooth grinding wheel. First, in the conventional technology, the central axis A1 of the internal tooth grinding wheel 2 and the central axis A3 of the dressing roll 4 are intersected at a first angle θ1, and the tooth tip shape of the internal tooth grinding wheel 2 is formed by the dressing roll 4. As a result, because the TIF diameter of the dressing gear 3 differs from the diameter of the dressing roll 4, a hollow shape like the surface P1 shown by the dashed line in FIG. 4 is formed. Because the hollow shape of the internal tooth grinding wheel 2 differs from the hollow shape originally intended, when a workpiece is machined using this internal tooth grinding wheel 2, the tooth tip of the grinding wheel may not reach the TIF of the workpiece, or the grinding wheel may interfere with the tooth root of the workpiece.

[0019] In contrast, in the first embodiment, the central axis A1 of the internally toothed grinding wheel 2 and the central axis A3 of the dressing roll 4 intersect at a second angle θ2, and the tooth tip shape of the internally toothed grinding wheel 2 is formed by the dressing roll 4. This results in a hollow shape like the surface P2 shown by the solid line in Fig. 4. The hollow shape imparted by the first embodiment is closer to the hollow shape that is originally desired to be imparted than hollow shapes imparted by conventional techniques, and is a shape that can be substantially approximated to the hollow shape that is originally desired to be imparted.

[0020] As described above, according to embodiment 1, by setting the intersection angle between the internal tooth grinding wheel 2 and the dressing roll 4 to the second angle θ2, it is possible to impart the hollow shape that is originally desired to be imparted to the internal tooth grinding wheel 2, and the accuracy of the hollow shape imparted to the internal tooth grinding wheel 2 can be improved.

[0021] (Embodiment 2) 5 is a diagram showing the positional relationship between the internally toothed grinding wheel and the dressing roll. The grinding wheel dressing device 11 includes an internally toothed grinding wheel 2, a dressing gear 3, and a dressing roll 14. The internally toothed grinding wheel 2 and the dressing gear 3 may have the same configuration as in the first embodiment, and therefore a description thereof will be omitted.

[0022] As shown in Figure 5, the dressing roll 14 is barrel-shaped with a larger diameter toward the center. The dressing roll 14 has a larger diameter than the TIF diameter of the dressing gear 3 and forms the tooth tip shape of the internally toothed grinding wheel 2. The barrel shape of the dressing roll 14 can be determined from the hollow shape of the dressing gear 3 due to the TIF diameter.

[0023] In the second embodiment, the central axis A1 of the internally toothed grinding wheel 2 and the central axis A4 of the dressing roll 14 intersect at a first angle θ1, and the tooth tip shape of the internally toothed grinding wheel 2 is formed by the dressing roll 14. As a result, the hollow shape imparted by the second embodiment is closer to the hollow shape that is originally desired to be imparted than the hollow shape imparted by the conventional technology, and is a shape that can be substantially approximated to the hollow shape that is originally desired to be imparted.

[0024] As described above, according to embodiment 2, by using the barrel-shaped dressing roll 14, it is possible to impart the hollow shape that is originally desired to the internal tooth grinding wheel 2, and the precision of the hollow shape imparted to the internal tooth grinding wheel 2 can be improved.

[0025] Further advantages and modifications will readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. [Explanation of symbols]

[0026] 1, 11 Grinding wheel dressing device 2 Internal tooth grinding wheel 3 Dress Gear 4, 14 Dress roll

Claims

1. a central axis of the cylindrical internally toothed grinding wheel and a central axis of the columnar dressing gear intersect at a first angle, and a tooth surface shape of the internally toothed grinding wheel is formed by the dressing gear; A grinding wheel dressing method in which the central axis of the internally toothed grinding wheel and the central axis of a cylindrical dressing roll having a diameter larger than the TIF diameter of the dress gear are intersected at a second angle different from the first angle, and the tooth tip shape of the internally toothed grinding wheel is formed by the dressing roll.

2. a central axis of the cylindrical internally toothed grinding wheel and a central axis of the columnar dressing gear intersect at a first angle, and a tooth surface shape of the internally toothed grinding wheel is formed by the dressing gear; A grinding wheel dressing method in which the central axis of the internally toothed grinding wheel and the central axis of a barrel-shaped dressing roll having a diameter larger than the TIF diameter of the dressing gear are intersected at the first angle, and the tooth tip shape of the internally toothed grinding wheel is formed by the dressing roll.

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