High-precision grinding wheel for grinding worm

Abstract

The high-precision grinding wheel comprises a grinding wheel base body and a grinding convex ring, and the grinding convex ring is annularly arranged in the circumferential direction of the grinding wheel base body and protrudes out of the outer circumferential wall of the grinding wheel base body. The two ends, in the axial direction of the grinding base body, of the grinding convex ring are provided with a first grinding face and a second grinding face which are connected with each other, the first grinding face is connected with the grinding base body through a first arc face, and the second grinding face is connected with the grinding base body through a second arc face. The arc curvature of the first arc surface is larger than that of the second arc surface. The first grinding surface and the second grinding surface of the convex ring can be ground, and scraps generated by grinding can be discharged along the first arc surface and the second arc surface; the grinding convex ring connected with the grinding wheel base body through the first arc face and the second arc face which are different in curvature is matched with the tooth groove of the worm workpiece to be ground in the rotating direction and abuts against the tooth groove, and the grinding convex ring is matched with grinding of the worm tooth groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to grinding tool technical field especially relates to a kind of high-precision grinding wheel for grinding worm. BACKGROUND

[0002] Currently, grinding tool for grinding worm, generally adopt high-performance abrasive such as cubic boron nitride (CBN) and special ceramic, these materials can withstand high-speed grinding, provide longer service life and better surface quality.For example, CBN grinding wheel because of its high hardness, good thermal stability, especially suitable for grinding hard materials.

[0003] In order to ensure the precise tooth shape of worm, the use of diamond roller becomes crucial, and the dressing process needs high precision to form the correct tooth groove profile, which directly affects the meshing performance and life of the final product. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the utility model discloses a kind of high-precision grinding wheel for grinding worm, it can grind the first grinding surface and the second grinding surface of the convex ring to grind the worm workpiece to be ground, and the chip produced by grinding can be discharged along the first circular surface and the second circular surface;And the first circular surface and the second circular surface with different curvatures and the grinding convex ring connected with the grinding wheel base are matched and abutted with the tooth groove rotation direction of the worm workpiece to be ground, so as to adapt to the grinding of worm tooth groove.

[0005] The utility model discloses the following technical solutions to achieve the purpose:

[0006] A kind of high-precision grinding wheel for grinding worm, including grinding wheel base and grinding convex ring, the grinding convex ring is arranged in the circumferential direction of the grinding wheel base, and protrudes from the outer peripheral wall of the grinding wheel base;The first grinding surface and the second grinding surface of the grinding convex ring are connected with each other in the axial direction of the grinding base, the first grinding surface is connected with the grinding base with the first circular surface, and the second grinding surface is connected with the grinding base with the second circular surface;The curvature of the first circular surface is greater than the curvature of the second circular surface.

[0007] Further, the first grinding surface and the second grinding surface are connected with the third circular surface.

[0008] Further, the first grinding surface, the second grinding surface and the third circular surface are all provided with abrasive material layer.

[0009] Further, the abrasive material layer is CBN abrasive material;The CBN abrasive material is formed on the first grinding surface, the second grinding surface and the third circular surface by electroplating process.

[0010] Further, the middle part of the grinding wheel base is provided with a clamping channel.

[0011] Further, the grinding wheel base is provided with a plurality of connecting holes; the plurality of connecting holes are distributed at intervals around the clamping channel.

[0012] Further, the axial end face of the grinding wheel base is provided with a positioning boss.

[0013] Further, the axial two ends of the grinding wheel base are provided with the positioning boss.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. By the first arc surface and the second arc surface with different curvatures and the grinding boss which is connected with the grinding wheel base, the grinding wheel base is matched with the tooth groove rotation direction of the worm workpiece to be ground and is abutted, so that the grinding requirement of the worm tooth groove of the worm workpiece to be ground is met.

[0016] 2. By the first grinding surface and the second grinding surface which are connected with each other and are arranged at the two ends of the grinding boss in the axial direction of the grinding base, the grinding force of the grinding wheel on the worm workpiece is more gentle during the grinding process, and the grinding damage to the worm workpiece is avoided.

[0017] 3. By the first grinding surface and the second grinding surface of the grinding boss, the grinding of the worm workpiece to be ground is carried out, the grinding debris can be discharged along the first arc surface and the second arc surface, and the grinding debris generated during the grinding of the worm workpiece by the grinding wheel can be discharged in time. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model;

[0019] Figure 2 It is a sectional view of the utility model.

[0020] In the drawing: 10, grinding wheel base; 11, clamping channel; 12, connecting hole; 13, positioning boss; 20, grinding boss; 21, first grinding surface; 22, second grinding surface; 23, first arc surface; 24, second arc surface; 25, third arc surface. DETAILED DESCRIPTION

[0021] Next, the utility model is further described in combination with the drawings and the specific implementation:

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0024] like Figure 1 as well as Figure 2 A high-precision grinding wheel for grinding a worm is shown, comprising a grinding wheel base 10 and a grinding bead 20. Specifically, the grinding bead 20 is arranged in a circumferential direction of the grinding wheel base 10 and protrudes from the outer peripheral wall of the grinding wheel base 10; and the grinding bead 20 has a first grinding surface 21 and a second grinding surface 22 connected to each other at both ends in the axial direction of the grinding base. In addition, the first grinding surface 21 is connected to the grinding base by a first circular arc surface 23, and the second grinding surface 22 is connected to the grinding base by a second circular arc surface 24; and the circular arc curvature of the first circular arc surface 23 is greater than the circular arc curvature of the second circular arc surface 24.

[0025] On the basis of the above structure, when using the high-precision grinding wheel for grinding worms of the present invention, the grinding wheel body can be sleeved on the external rotating shaft through the clamping channel 11 provided on the grinding wheel base 10, and the external rotating shaft is then rotated after being connected to the external driving device, thereby driving the grinding wheel base 10 to rotate with the external rotating shaft, so that the worm workpiece to be ground can be ground. The above-mentioned clamping channel can be a hole-like structure such as a through hole or a threaded hole.

[0026] Specifically, a grinding protrusion 20 can be provided on the circumferential ring of the grinding wheel base 10 and protrude from the outer peripheral wall of the grinding wheel base 10, and then a first grinding surface 21 and a second grinding surface 22 that are connected to each other can be provided at both ends of the grinding protrusion 20 on the axial direction of the grinding base, so that the grinding wheel base 10 can perform a grinding operation on the worm workpiece to be ground through the grinding protrusion 20. During the grinding operation, the grinding protrusion 20 of the grinding wheel extends into the tooth groove of the worm workpiece to be ground and abuts against it, and then the side walls of the tooth groove of the worm workpiece to be ground can be ground through the first grinding surface 21 and the second grinding surface 22. In this way, the contact area between the grinding wheel and the worm workpiece during grinding can be reduced, thereby increasing the stress generated by the worm workpiece when being ground by the grinding wheel, and improving the grinding efficiency of the grinding wheel on the worm workpiece.

[0027] In addition, the first grinding surface 21 is connected with the grinding base by the first circular arc surface 23, and the second grinding surface 22 is connected with the grinding base by the second circular arc surface 24. In this way, the first grinding surface 21 and the second grinding surface 22 on the grinding convex circle 20 of the grinding wheel base 10 can share the radial force and the axial force generated by the worm workpiece during the grinding process, so that the grinding wheel base 10 is more gentle to the worm workpiece, and the worm workpiece is not easy to be damaged during the grinding process. The above-mentioned circular arc surface structure can also be replaced by a parabolic arc or an elliptical arc.

[0028] In addition, during the grinding process, the side walls of the worm gear groove will produce scraps. The scraps generated during grinding can be guided to the first circular arc surface 23 and the second circular arc surface 24 by the first grinding surface 21 and the second grinding surface 22, and rotate with the rotation of the grinding wheel base 10. In this way, the scraps generated during grinding can be discharged in time after the rotation of the grinding wheel base 10, avoiding the accumulation of scraps affecting the grinding effect.

[0029] In addition, the circular arc curvature of the first circular arc surface 23 is greater than that of the second circular arc surface 24. Specifically, the curvatures of the two side walls of the worm gear groove can be determined by the workpiece parameters of the worm workpiece to be ground in advance, and then the corresponding grinding wheel is made. The circular arc curvatures of the first circular arc surface 23 and the second circular arc surface 24 corresponding to the first grinding surface and the second grinding surface 22 on the grinding convex circle 20 of the grinding wheel are matched with the curvatures of the two side walls of the worm gear groove. In this way, the first circular arc surface 23 and the second circular arc surface 24 can be matched and abutted on the two side walls of the worm gear groove with different curvatures during grinding, so as to meet the grinding requirements of the worm workpiece to be ground.

[0030] Of course, during the rotation of the grinding wheel base 10, the grinding wheel base 10 can be clamped and limited by external shielding clamps at both axial ends of the grinding wheel base 10. Therefore, the interference caused by external axial force on the grinding process of the grinding wheel can be shielded during the grinding process, and the stability of the grinding wheel base 10 during grinding can be improved.

[0031] Further, the first grinding surface 21 and the second grinding surface 22 are connected by the third circular surface 25. When grinding the worm workpiece, the two side walls and the bottom wall of the worm groove need to be ground. The grinding wheel can be inserted into the worm groove for grinding operation. The first grinding surface 21 and the second grinding surface 22 abut the two side walls of the worm groove and can grind the side walls. The third circular surface 25 abuts the bottom wall of the worm groove and can grind the bottom wall. The first grinding surface 21, the second grinding surface 22 and the third circular surface 25 can complete the grinding operation of the worm workpiece. The first grinding surface 21 and the second grinding surface 22 are connected by the third circular surface 25, so that the grinding wheel is more gentle when grinding the worm workpiece, and the worm workpiece is not damaged.

[0032] Further, the first grinding surface 21, the second grinding surface 22 and the third circular surface 25 are provided with an abrasive material layer. The abrasive material layer can be selected from the MD material layer, the CBN material layer, the BC material layer and the GC material layer in the prior art. The abrasive material layer can enhance the grinding hardness of the grinding wheel and improve the grinding efficiency of the grinding wheel.

[0033] Further, the abrasive material layer is CBN abrasive material. The CBN abrasive material can be formed on the first grinding surface 21, the second grinding surface 22 and the third circular surface 25 by electroplating process. The CBN abrasive material has high hardness, good thermal stability and can withstand high-speed grinding. The service life of the grinding wheel can be prolonged, and the grinding quality of the worm workpiece can be improved.

[0034] Further, a plurality of connecting holes 12 can be provided on the grinding wheel body 10 and spaced around the clamping channel 11. The grinding wheel body can be sleeved on the external shaft through the clamping channel 11 provided on the grinding wheel body 10. Then, the grinding wheel body 10 can be clamped and limited by the external shielding clamping plate through the plurality of connecting holes 12 in the screw structure at the axial ends of the grinding wheel body 10. The external shielding clamping plate is sleeved on the external shaft and then connected with the external driving device to rotate. Thus, the grinding wheel is more stable during rotation, and the stability of the grinding wheel is improved.

[0035] Further, the axial end surface of the grinding wheel body 10 is provided with a positioning protruding ring 13. The positioning protruding ring 13 is used for clamping the grinding wheel body 10 with the external shielding clamping plate. Thus, the contact area of the grinding wheel body 10 and the external shielding clamping plate is reduced, the friction between the external shielding clamping plate and the grinding wheel body 10 is increased, the grinding wheel body 10 is not easy to loosen and fall off, and the overall stability of the grinding wheel body 10 during grinding operation is improved.

[0036] Further, the positioning protrusions 13 are arranged at both axial ends of the grinding wheel base 10, so that the clamping stability of the grinding wheel base 10 by the external shielding clamping plate is further enhanced.

[0037] For those skilled in the art, other various corresponding changes and modifications can be made according to the technical solutions and concepts described above, and all these changes and modifications shall fall within the protection scope of the present application.

Claims

1. A high-precision grinding wheel for grinding worms, characterized in that: It includes a grinding wheel base and a grinding convex ring, wherein the grinding convex ring is arranged in the circumference of the grinding wheel base and protrudes from the outer peripheral wall of the grinding wheel base; the grinding convex ring has a first grinding surface and a second grinding surface connected to each other at both ends of the grinding wheel base in the axial direction, the first grinding surface is connected to the grinding wheel base with a first circular arc surface, and the second grinding surface is connected to the grinding wheel base with a second circular arc surface; the arc curvature of the first circular arc surface is greater than the arc curvature of the second circular arc surface.

2. The high-precision grinding wheel for grinding worms according to claim 1, characterized in that: The first grinding surface and the second grinding surface are connected by a third arc surface.

3. The high-precision grinding wheel for grinding worms according to claim 2, characterized in that: The first grinding surface, the second grinding surface and the third arc surface are all provided with an abrasive material layer.

4. The high-precision grinding wheel for grinding worms according to claim 3, characterized in that: The abrasive material layer is a CBN abrasive material; the CBN abrasive material is formed on the first grinding surface, the second grinding surface and the third arc surface by an electroplating process.

5. The high-precision grinding wheel for grinding worm according to any one of claims 1 to 4, characterized in that: A clamping channel is provided in the middle of the grinding wheel base.

6. The high-precision grinding wheel for grinding worms according to claim 5, characterized in that: The grinding wheel base is provided with a plurality of connection holes; the plurality of connection holes are distributed at intervals around the clamping channel.

7. The high-precision grinding wheel for grinding worms according to claim 5, characterized in that A positioning convex ring is provided on the axial end surface of the grinding wheel base.

8. The high-precision grinding wheel for grinding worms according to claim 7, characterized in that: The positioning protrusions are provided at both axial ends of the grinding wheel base.

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