Internal gear grinding tool with double-shaped CBN grinding wheels

Abstract

The utility model discloses an internal gear grinding tool of a double-formed CBN grinding wheel, comprising: a grinding body shell, a grinding tool mechanism and a power output device are installed on the grinding body shell, a power transmission device is installed on the output end of the power output device, and the power transmission device is synchronously transmitted with the grinding tool mechanism through a first synchronous transmission mechanism; the grinding tool mechanism is connected to a grinding wheel mechanism through a second synchronous transmission mechanism. After the rotation speed output by the servo motor is transmitted through multiple stages of synchronous pulleys with different reduction ratios, the rotation speed of the grinding wheel spindle increases, and the linear speed of the grinding wheel increases, so that a smaller diameter grinding wheel can be used to process small modulus internal gears, expanding the processing specifications of the machine tool. A double grinding wheel spindle structure is adopted, that is, one is used for rough grinding and the other is used for fine grinding. On the one hand, it saves the time for dressing and replacing the grinding wheel, and on the other hand, it uses a CBN non-dressable grinding wheel to reduce the processing cost of internal gears.

Description

Technical Field

[0001] The utility model relates to the technical field of gear grinding tool, in particular to an internal gear grinding tool with double-shaped CBN grinding wheels. Background Art

[0002] High-precision, small-module internal gear grinding equipment is CNC equipment urgently needed in key scientific and technological industries such as aerospace, military industry, etc. The main difficulties in processing high-precision, small-module internal gears are that the internal gear specifications are small, the grinding wheel size is limited, the grinding wheel speed cannot be increased, and the processing efficiency is low.

[0003] According to the characteristics of internal gears, the grinding wheel must be smaller than the diameter of the internal gear tooth top circle. The existing internal gear grinder has a single grinding wheel structure, resulting in a very low grinding wheel utilization rate. At the same time, due to the structural characteristics of the internal grinding arm, it is relatively complicated to replace the grinding wheel, resulting in low processing efficiency and difficulty in personnel operation. Utility Model Content

[0004] In view of the above defects or shortcomings, the purpose of the utility model is to provide an internal gear grinding tool with double-shaped CBN grinding wheels.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] An internal gear grinding tool for a double-shaped CBN grinding wheel comprises: a grinding tool body shell, on which a grinding tool mechanism and a power output device are installed, an output end of the power output device is installed with a power transmission device, and the power transmission device is synchronously transmitted with the grinding tool mechanism through a first synchronous transmission mechanism; the grinding tool mechanism is connected to a grinding wheel mechanism through a second synchronous transmission mechanism.

[0007] The power output device is connected to the power transmission device through a first synchronous belt.

[0008] The mold mechanism includes: a first mold mechanism and a second mold mechanism with the same structure, the first mold mechanism is equipped with a first synchronous pulley, and the second mold mechanism is equipped with a second synchronous pulley; the first synchronous pulley is connected to the power transmission device through a second synchronous belt, and the first synchronous pulley is connected to the second synchronous pulley through a third synchronous belt.

[0009] The first grinding tool mechanism and the second grinding tool mechanism are respectively provided with a first synchronous belt adjustment plate and a second synchronous belt adjustment plate, and the first synchronous belt adjustment plate and the second synchronous belt adjustment plate are fixedly installed on the grinding tool body shell.

[0010] The first grinding tool mechanism comprises: a grinding tool transmission mechanism installed on the first synchronous pulley, and the grinding tool transmission mechanism is connected to the grinding wheel mechanism.

[0011] The grinding tool transmission mechanism comprises: a grinding tool pulley shaft, a third synchronous pulley is installed on the output end of the grinding tool pulley shaft, and the third synchronous pulley is connected to the grinding wheel mechanism through a fourth synchronous belt.

[0012] The grinding wheel mechanism comprises a grinding wheel spindle, on which a grinding wheel and a fourth synchronous belt wheel are mounted, and the grinding tool transmission mechanism is connected to the fourth synchronous belt wheel.

[0013] The grinding wheel is fixed by a double hexagonal nut and an angular contact bearing, and is self-locked on the grinding wheel spindle by the double hexagonal nut.

[0014] The first synchronous pulley is fixed to the abrasive tool pulley shaft by screws, and the third synchronous pulley is fixed to the output end of the abrasive tool pulley shaft by a precision radial locking nut.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides an internal gear grinding tool with double-shaped CBN grinding wheels. After the rotation speed output by a servo motor is transmitted through multi-stage synchronous pulleys with different reduction ratios, the rotation speed of the grinding wheel spindle is increased, and the linear speed of the grinding wheel is increased. Therefore, a grinding wheel with a smaller diameter can be used to process small-modulus internal gears, and the processing specifications of the machine tool are expanded. A double-grinding wheel spindle structure is adopted, that is, one is used for rough grinding and the other is used for fine grinding. On the one hand, the time for dressing and replacing the grinding wheel is saved, and on the other hand, a CBN non-dressable grinding wheel is used to reduce the processing cost of the internal gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the internal gear grinding tool structure of the double-shaped CBN grinding wheel of the utility model;

[0018] Figure 2 This is a schematic diagram of the abrasive tool transmission mechanism of the utility model;

[0019] Figure 3 It is a schematic diagram of the grinding wheel mechanism of the utility model.

[0020] In the figure, 1 is a grinding tool housing; 2 is a power output device; 3 is a first synchronous belt; 4 is a power transmission device; 5 is a second synchronous belt; 6 is a first synchronous pulley; 7 is a first grinding tool mechanism; 8 is a third synchronous belt; 9 is a second synchronous pulley; 10 is a fourth synchronous belt; 11 is a third synchronous pulley; 12 is a front angular contact bearing; 13 is a grinding wheel; 14 is a rear angular contact bearing; 15 is a fourth synchronous pulley; 16 is a grinding tool transmission mechanism; 17 is a grinding wheel spindle; 18 is a double hexagonal nut; 19 is a screw; 20 is a grinding tool pulley shaft; 21 is a precision radial locking nut; 22 is a first synchronous belt adjustment plate; 23 is a second synchronous belt adjustment plate; 24 is a second grinding tool mechanism. DETAILED DESCRIPTION

[0021] The utility model will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0022] like Figure 1 As shown, the utility model provides an internal gear grinding tool with double-formed CBN grinding wheels, comprising: a grinding tool body shell 1, on which a grinding tool mechanism and a power output device 2 are installed, and a power transmission device 4 is installed at the output end of the power output device 2, and the power transmission device 4 is synchronously transmitted with the grinding tool mechanism through a first synchronous transmission mechanism; the grinding tool mechanism is connected to a grinding wheel mechanism through a second synchronous transmission mechanism.

[0023] Specifically, the power output device 2 is connected to the power transmission device 4 via a first synchronous belt 3 .

[0024] The mold mechanism includes: a first mold mechanism 7 and a second mold mechanism 24 of the same structure, a first synchronous pulley 6 is installed on the first mold mechanism 7, and a second synchronous pulley 9 is installed on the second mold mechanism 24; the first synchronous pulley 6 is connected to the power transmission device 4 through the second synchronous belt 5, and the first synchronous pulley 6 is connected to the second synchronous pulley 9 through the third synchronous belt 8. The first synchronous pulley 6 has a double-tooth structure, the first synchronous pulley 6 is connected to the power transmission device 4 through the second synchronous belt 5, and the first synchronous pulley 6 is connected to the second synchronous pulley 9 through the third synchronous belt 8.

[0025] Preferably, in the present invention, the first grinding tool mechanism 7 and the second grinding tool mechanism 24 are respectively installed with a first synchronous belt adjustment plate 22 and a second synchronous belt adjustment plate 23, and the first synchronous belt adjustment plate 22 and the second synchronous belt adjustment plate 23 are fixedly installed on the grinding tool body shell 1.

[0026] The specific structure of the grinding tool mechanism is described below by taking the first grinding tool mechanism 7 as an example:

[0027] like Figure 2 , 3 As shown, the first grinding tool mechanism 7 includes: a grinding tool transmission mechanism 16 installed on the first synchronous belt wheel 6, and the grinding tool transmission mechanism 16 is connected to the grinding wheel mechanism. The grinding tool transmission mechanism 16 includes: a grinding tool belt wheel shaft 20, and the output end of the grinding tool belt wheel shaft 20 is installed with a third synchronous belt wheel 11, and the third synchronous belt wheel 11 is connected to the grinding wheel mechanism through a fourth synchronous belt 10.

[0028] Specifically, the grinding wheel mechanism includes: a grinding wheel spindle 17 , on which a grinding wheel 13 and a fourth synchronous pulley 15 are mounted, and the grinding tool transmission mechanism 16 is connected to the fourth synchronous pulley 15 .

[0029] Preferably, the grinding wheel 13 is fixed by pressing the angular contact bearing 12 with a double hexagonal nut 18 , and is self-locked on the grinding wheel spindle 17 by the double hexagonal nut 18 .

[0030] In addition, the first synchronous pulley 6 is fixed to the mold pulley shaft 20 by means of screws 19 , and the third synchronous pulley 11 is fixed to the output end of the mold pulley shaft 20 by means of a precision radial locking nut 21 .

[0031] like Figure 1 As shown, specifically, the center distance of the second synchronous belt 5 is adjusted by the first synchronous belt adjustment plate 22, and the center distance of the third synchronous belt 8 is adjusted by the second synchronous belt adjustment plate 23. The first synchronous belt adjustment plate 22 and the second synchronous belt adjustment plate 23 are fixed to the grinding body shell 1 respectively, and the second synchronous belt 5 is installed on the power transmission device 4 and the first synchronous belt pulley 6. By rotating the two tightening screws or the two tensioning screws on the first synchronous belt adjustment plate 22, the grinding wheel spindle 17 is moved up and down in the vertical direction as a whole, so that the second synchronous belt 5 is tightened. Similarly, by adjusting the position of the second synchronous belt adjustment plate 23, the third synchronous belt 8 is tightened.

[0032] like Figure 3 As shown, the grinding wheel 13 is fixed by a double hexagonal nut 18 and a front angular contact bearing 12 and a rear angular contact bearing 14. The double hexagonal nuts 18 are self-locking with each other, which effectively prevents the grinding wheel 13 from axial movement when rotating at high speed. The grinding wheel 13 is a (CBNCubic Boron Nitride) non-dressable grinding wheel, which reduces the cost of internal gear processing.

[0033] It should be noted that the fourth synchronous pulley 15 is integrally processed with the pulley shaft where the fourth synchronous belt 15 is located. The utility model exemplarily gives several ways of fixing the synchronous pulley and the pulley shaft: 1. The inner hole of the first synchronous pulley 6 is clearance-matched with the mold pulley shaft 20, and the axial clearance is 0.5-1mm, and then the first synchronous pulley 6 is fixed to the end face of the mold pulley shaft 20 by the screw 19; 2. The inner hole of the third synchronous pulley 11 is clearance-matched with the mold pulley shaft 20, and the right end of the mold pulley shaft 20 is stepped, and the right side of the step that matches the third synchronous pulley 11 is a smaller step, and is processed with an external thread, so that the end face of the precision radial locking nut 21 can be pressed against the third synchronous pulley 11, and the precision radial locking nut 21 has a self-locking function; 3. When the inner hole of the synchronous pulley is too small and the pulley shaft is too thin, it is impossible to drill a threaded hole on the end face of the pulley shaft and the pulley shaft cannot be made into a stepped shape, in order to ensure the overall rigidity, the pulley shaft and the pulley can be processed as one.

[0034] The working process of this utility model is:

[0035] The power output device 2 drives the power transmission device 4 to rotate through the first synchronous belt 3, the power transmission device 4 drives the first synchronous pulley 6 to rotate through the second synchronous belt 5, and the first synchronous pulley 6 drives the second synchronous pulley 9 to rotate through the third synchronous belt 8;

[0036] The first synchronous pulley 6 and the second synchronous pulley 9 respectively drive the third synchronous pulley 11 to rotate through the grinding tool pulley shaft 20, the third synchronous pulley 11 drives the fourth synchronous pulley 15 to rotate through the fourth synchronous belt 10, and the fourth synchronous pulley 15 drives the grinding wheel 13 to rotate, so that the two grinding wheels 13 on the wheel spindle 17 rotate at the same time. The internal tooth grinding tool of the utility model adopts a double grinding tool spindle design, one spindle is used for rough grinding, and the other spindle is used for fine grinding. At the same time, a CBN non-dressable grinding wheel is used, which greatly reduces the frequency of grinding wheel replacement and ensures that the grinding tool achieves high-precision and high-efficiency processing.

[0037] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred schemes of the present invention. Therefore, the improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and achieve the purpose of the present invention, and all belong to the scope of protection of the present invention.

Claims

1. An internal gear grinding tool with double-shaped CBN grinding wheels, characterized in that: include: A grinding tool shell (1) is provided, wherein a grinding tool mechanism and a power output device (2) are installed on the grinding tool shell (1); a power transmission device (4) is installed at the output end of the power output device (2); the power transmission device (4) is synchronously transmitted with the grinding tool mechanism via a first synchronous transmission mechanism; and the grinding tool mechanism is connected to a grinding wheel mechanism via a second synchronous transmission mechanism.

2. The internal gear grinding tool with double-shaped CBN grinding wheels according to claim 1, characterized in that: The power output device (2) is connected to the power transmission device (4) via a first synchronous belt (3).

3. The internal gear grinding tool with double-shaped CBN grinding wheels according to claim 1, characterized in that: The mold mechanism comprises: a first mold mechanism (7) and a second mold mechanism (24) of identical structure; a first synchronous pulley (6) is mounted on the first mold mechanism (7), and a second synchronous pulley (9) is mounted on the second mold mechanism (24); the first synchronous pulley (6) is connected to a power transmission device (4) via a second synchronous belt (5), and the first synchronous pulley (6) is connected to the second synchronous pulley (9) via a third synchronous belt (8).

4. The internal gear grinding tool with double-shaped CBN grinding wheels according to claim 3, characterized in that: The first grinding tool mechanism (7) and the second grinding tool mechanism (24) are respectively provided with a first synchronous belt adjustment plate (22) and a second synchronous belt adjustment plate (23), and the first synchronous belt adjustment plate (22) and the second synchronous belt adjustment plate (23) are fixedly mounted on the grinding tool body shell (1).

5. The internal gear grinding tool with double-shaped CBN grinding wheels according to claim 3 or 4, characterized in that: The first grinding tool mechanism (7) comprises: a grinding tool transmission mechanism (16) installed on the first synchronous pulley (6), and the grinding tool transmission mechanism (16) is connected to the grinding wheel mechanism.

6. The internal gear grinding tool with double-shaped CBN grinding wheels according to claim 5, characterized in that: The grinding tool transmission mechanism (16) comprises: a grinding tool pulley shaft (20); a third synchronous pulley (11) is installed at the output end of the grinding tool pulley shaft (20); and the third synchronous pulley (11) is connected to the grinding wheel mechanism via a fourth synchronous belt (10).

7. The internal gear grinding tool with double-shaped CBN grinding wheels according to claim 5 or 6, characterized in that: The grinding wheel mechanism comprises: a grinding wheel spindle (17), a grinding wheel (13) and a fourth synchronous belt wheel (15) are mounted on the grinding wheel spindle (17), and the grinding tool transmission mechanism (16) is connected to the fourth synchronous belt wheel (15).

8. The internal gear grinding tool with double-shaped CBN grinding wheels according to claim 7, characterized in that: The grinding wheel (13) is fixed by a double hexagonal nut (18) and an angular contact bearing, and is self-locked on the grinding wheel spindle (17) by the double hexagonal nut (18).

9. The internal gear grinding tool with double-shaped CBN grinding wheels according to claim 6, characterized in that: The first synchronous pulley (6) is fixed to the mold pulley shaft (20) by means of a screw (19), and the third synchronous pulley (11) is fixed to the output end of the mold pulley shaft (20) by means of a precision radial locking nut (21).

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