High-precision outer curved surface grinding machine

Abstract

The utility model relates to the technical field of curved surface grinding, in particular to a high-precision outer curved surface grinding machine which comprises a machine base, an upper grinding disc and a lower grinding disc are arranged on the machine base, the upper grinding disc is located over the lower grinding disc, a plurality of mounting ring grooves are formed in the opposite faces of the upper grinding disc and the lower grinding disc, and the upper grinding disc and the lower grinding disc are coaxial with the mounting ring grooves. A mounting ring seat is detachably arranged in the mounting ring groove, grinding grooves are formed in the opposite surfaces of the mounting ring seat, grinding layers are arranged on the inner walls of the grinding grooves, and grinding grooves are formed in the opposite surfaces of the grinding layers. The method has the effects of reducing the situation that the abrasive loss is too high and reducing the grinding cost of the spherical workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of curved surface grinding, in particular to a high-precision external curved surface grinding machine. Background Art

[0002] In the production process of the inner ring of the spherical bearing and the sealing precision parts of the special valve body, it is necessary to use composite abrasives such as green carbon sand, lapping fluid, alloy micropowder, etc. to ultra-finely process spherical workpieces of various materials to improve the spherical rate accuracy of the outer surface of the spherical workpiece.

[0003] In the related art, a Chinese patent with authorization announcement number CN208906458U provides a spherical workpiece grinding machine with a cleaning device, which includes a workbench, an upper grinding disc and a lower grinding disc are installed on the workbench, the upper grinding disc and the lower grinding disc are arranged oppositely, and the upper grinding disc and the lower grinding disc have a plurality of raised grinding lines on their opposite surfaces, and grooves are formed between adjacent grinding lines. The spherical workpiece is placed in the groove of the lower grinding disc, and then the upper grinding disc is moved downward so that the spherical workpiece fits with the groove of the upper grinding disc, and then the upper grinding disc and the lower grinding disc rotate relative to each other, and the spherical rate accuracy of the outer curved surface of the spherical workpiece is improved by utilizing the revolution of the grinding disc, the rotation of the spherical workpiece and the centrifugal force of the rotation.

[0004] In the process of realizing the present application, the inventors found that there are at least the following problems in the technology: since spherical workpieces of different materials need to use abrasives of different materials, and spherical workpieces of different sizes need to use grooves of different sizes, the upper grinding disc and the lower grinding disc need to be customized according to the spherical workpiece. However, since the upper grinding disc and the lower grinding disc are both integral structures made of abrasives, and in the process of the upper grinding disc and the lower grinding disc relatively rotating to grind the spherical workpiece, only the abrasives on the inner wall of the groove produce a grinding effect, and the abrasives in other positions only play a structural role, resulting in a low abrasive utilization rate, excessive abrasive loss, and a high grinding cost for the spherical workpiece. Utility Model Content

[0005] In order to reduce the situation of excessive abrasive loss and lower the grinding cost of spherical workpieces, the present application provides a high-precision external curved surface grinding machine.

[0006] The high-precision external curved surface grinding machine provided in this application adopts the following technical solution:

[0007] A high-precision external curved surface grinding machine comprises a machine base, an upper grinding disc and a lower grinding disc are arranged on the machine base, the upper grinding disc is located directly above the lower grinding disc, a plurality of mounting ring grooves are provided on the opposite surfaces of the upper grinding disc and the lower grinding disc, the upper grinding disc and the lower grinding disc are coaxially arranged with the mounting ring grooves, a mounting ring seat is detachably arranged in the mounting ring groove, abrasive grooves are provided on the opposite surfaces of the mounting ring seat, an abrasive layer is provided on the inner wall of the abrasive groove, and abrasive grooves are provided on the opposite surfaces of the abrasive layer.

[0008] By adopting the above technical scheme, the spherical workpiece is placed in the abrasive groove of the lower grinding disc, and then the upper grinding disc and the lower grinding disc are brought close to each other until the spherical workpiece fits with the abrasive groove of the upper grinding disc. The upper grinding disc and the lower grinding disc rotate relatively, and the outer surface of the spherical workpiece is polished by the revolution of the grinding disc, the rotation of the spherical workpiece and the centrifugal force of the rotation, so that the sphericity accuracy of the outer curved surface of the spherical workpiece is improved. Since the abrasive layer in the mounting ring seat is selected from corresponding materials according to the material of the spherical workpiece, and the abrasive grooves in the abrasive layer are customized according to the size of the spherical workpiece, the upper grinding disc and the lower grinding disc can be adapted to different spherical workpieces by replacing the mounting ring seat without replacing the upper grinding disc and the lower grinding disc as a whole. At the same time, the abrasive is only applied to the position of the abrasive layer, which reduces the loss of the abrasive, improves the utilization rate of the abrasive, and reduces the grinding cost of the spherical workpiece.

[0009] Preferably, a connecting ring seat and a clamping ring seat are arranged between the outer wall of the mounting ring seat and the inner wall of the mounting ring groove, the clamping ring seat is used to abut the connecting ring seat against the mounting ring groove, the inner wall of the connecting ring seat is fixedly connected to the outer wall of the mounting ring seat, and the outer wall of the clamping ring seat is detachably connected to the inner wall of the mounting ring groove.

[0010] By adopting the above technical scheme, the mounting ring seat and the connecting ring seat are inserted in the mounting ring groove, the inner ring wall of the mounting ring seat fits with the inner ring wall of the mounting ring groove, and the outer ring wall of the connecting ring seat fits with the outer ring wall of the mounting ring groove, so that the mounting ring seat is not easy to shake in the mounting ring groove, and the clamping ring seat is installed in the mounting ring groove to press the connecting ring seat and the mounting ring groove tightly, so that the connecting ring seat and the mounting ring seat are not easy to fall off from the mounting ring groove. When the clamping ring seat is removed from the mounting ring seat, the mounting ring seat can be taken out of the mounting ring groove, thereby achieving the effect of detachable connection between the mounting ring seat and the mounting ring groove.

[0011] Preferably, the opposite surface of the mounting ring seat protrudes from the opposite surface of the pressing ring seat.

[0012] By adopting the above technical solution, the spherical workpiece is facilitated to fit with the abrasive groove, so that the clamping ring seat is not easy to contact with the spherical workpiece, and the reduction in the processing accuracy of the spherical workpiece is reduced.

[0013] Preferably, an external thread groove is formed on the outer wall of the clamping ring seat, and an internal thread groove is formed on the inner wall of the mounting ring groove, and the external thread groove and the internal thread groove cooperate with each other.

[0014] By adopting the above technical solution, the clamping ring seat is threadedly connected to the mounting ring groove, thereby achieving the effect of detachable connection between the clamping ring seat and the mounting ring groove.

[0015] Preferably, a plurality of limit grooves are formed at one end of the connecting ring seat away from the clamping ring seat, a plurality of limit rods are fixedly arranged on the inner wall of the mounting ring groove, and the limit grooves are used for inserting the limit rods.

[0016] By adopting the above technical solution, when the limit rod is inserted into the limit groove, the connecting ring seat, the mounting ring seat and the mounting ring groove are not easy to rotate relative to each other, and then when the abrasive groove rubs against the spherical workpiece, the mounting ring seat is not easy to move synchronously with the spherical workpiece.

[0017] Preferably, a driving groove is provided on the top of the machine base, a driving motor is fixedly arranged in the driving groove, an output shaft of the driving motor is fixedly connected to the center of the bottom of the lower grinding disc, a plurality of lifting grooves are provided on the side wall of the machine base, a lifting hydraulic rod is fixedly arranged in the lifting groove, and an output shaft of the lifting hydraulic rod is fixedly connected to the bottom of the upper grinding disc.

[0018] By adopting the above technical solution, the driving motor rotates the lower grinding disc, thereby achieving the effect of relative rotation of the upper grinding disc and the lower grinding disc, and the output shaft of the lifting hydraulic rod drives the upper grinding disc to rise and fall, thereby achieving the effect of relative movement of the upper grinding disc and the lower grinding disc.

[0019] Preferably, a positioning groove is opened at the top center of the lower grinding disc, a pressure sensor is fixedly arranged on the inner wall of the positioning groove, a positioning rod is fixedly arranged at the bottom center of the upper grinding disc, the positioning groove is for inserting the positioning rod, and the pressure sensor is used to detect the force exerted by the positioning rod on the inner wall of the positioning groove.

[0020] By adopting the above technical solution, when the upper grinding disc and the lower grinding disc rotate relative to each other, the positioning rod is inserted in the positioning groove, and when the mid-vertical lines of the upper grinding disc and the lower grinding disc are misaligned, the positioning rod rotates eccentrically relative to the positioning groove, causing the pressure value detected by the pressure sensor to change, and then the pressure sensor feedback signal stops the drive motor, thereby reducing the situation where the spherical workpiece is processed unqualifiedly due to the misalignment of the abrasive groove, and reducing the grinding cost of the spherical workpiece.

[0021] Preferably, a rubber layer is fixedly provided on the outer wall of the positioning rod, and the rubber layer is used to abut against the pressure sensor.

[0022] By adopting the above technical solution, when the positioning rod rotates eccentrically relative to the positioning groove, the positioning rod squeezes the rubber layer to change the pressure value detected by the pressure sensor, thereby reducing the situation where the positioning rod directly squeezes the pressure sensor and causes damage to the pressure sensor.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By setting the machine base, upper grinding disc, lower grinding disc, mounting ring groove, mounting ring seat, abrasive groove, abrasive layer and abrasive groove, the loss of abrasive is reduced, the utilization rate of abrasive is improved, and the grinding cost of spherical workpieces is reduced;

[0025] 2. By setting a connecting ring seat and a pressing ring seat, the effect of detachable connection between the mounting ring seat and the mounting ring groove is achieved;

[0026] 3. By setting positioning grooves, pressure sensors and positioning rods, the situation of unqualified processing of spherical workpieces caused by misalignment of abrasive grooves can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of a high-precision external curved surface grinding machine in an embodiment of the present application.

[0028] Figure 2 It is a cross-sectional view showing the positional relationship between the mounting ring groove and the internal thread groove in the embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view showing the positional relationship between the mounting ring seat and the clamping ring seat in the embodiment of the present application.

[0030] Figure 4 It is a cross-sectional view showing the connection relationship between the upper grinding disc and the lower grinding disc in the embodiment of the present application.

[0031] Figure 5 yes Figure 4 Enlarged view of part A.

[0032] Figure 6 yes Figure 4 Magnified view of part B.

[0033] Explanation of the reference numerals in the accompanying drawings: 1. machine base; 11. upper grinding disc; 12. lower grinding disc; 2. mounting ring seat; 21. mounting ring groove; 3. abrasive layer; 31. abrasive groove; 4. abrasive groove; 5. connecting ring seat; 51. limiting groove; 52. limiting rod; 6. clamping ring seat; 61. external thread groove; 62. internal thread groove; 7. driving motor; 71. driving groove; 8. lifting hydraulic rod; 81. lifting groove; 9. positioning rod; 91. positioning groove; 92. pressure sensor; 93. rubber layer. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] The present application embodiment discloses a high-precision external curved surface grinding machine. Figures 1 to 6, including a machine base 1, a driving groove 71 is provided on the top of the machine base 1, and a driving motor 7 is installed in the driving groove 71. A lower grinding disc 12 is installed on the driving motor 7, and the bottom center of the lower grinding disc 12 is welded to the output shaft of the driving motor 7, and the bottom of the lower grinding disc 12 is rotatably connected to the top of the machine base 1 through a bearing. Lifting grooves 81 are provided on both sides of the machine base 1, and a lifting hydraulic rod 8 is installed in the lifting grooves 81. An upper grinding disc 11 is installed on the output shaft of the lifting hydraulic rod 8, and the upper grinding disc 11 is located directly above the lower grinding disc 12, and the median perpendicular line of the upper grinding disc 11 coincides with the median perpendicular line of the lower grinding disc 12. A plurality of mounting annular grooves 21 are provided on the opposite surfaces of the upper grinding disc 11 and the lower grinding disc 12, and the upper grinding disc 11, the lower grinding disc 12, and the mounting annular grooves 21 are all coaxially arranged. A detachable mounting ring seat 2 is installed in the mounting ring groove 21, and an abrasive groove 31 is provided on the opposite surface of the mounting ring seat 2. The inner wall of the abrasive groove 31 is filled with an abrasive layer 3, and the opposite surface of the abrasive layer 3 forms an abrasive groove 4 in contact with the spherical workpiece. The spherical workpiece is placed in the abrasive groove 4 of the lower grinding disc 12, and then the output shaft of the lifting hydraulic rod 8 drives the upper grinding disc 11, so that the upper grinding disc 11 and the lower grinding disc 12 are close to each other, until the spherical workpiece fits the abrasive groove 4 of the upper grinding disc 11, and then the driving motor 7 drives the lower grinding disc 12 to rotate, so that the upper grinding disc 11 and the lower grinding disc 12 rotate relative to each other. By utilizing the revolution of the grinding disc, the rotation of the spherical workpiece and the centrifugal force of the rotation, the outer surface of the spherical workpiece is polished, and the spherical rate accuracy of the outer curved surface of the spherical workpiece is improved. Since the abrasive layer 3 in the mounting ring seat 2 is made of a corresponding material according to the material of the spherical workpiece, and the abrasive groove 4 in the abrasive layer 3 is customized according to the size of the spherical workpiece, the upper grinding disc 11 and the lower grinding disc 12 can be adapted to different spherical workpieces by replacing the mounting ring seat 2 without having to replace the upper grinding disc 11 and the lower grinding disc 12 as a whole. At the same time, the abrasive is only applied to the abrasive layer 3 in contact with the spherical workpiece, which reduces the loss of the abrasive, improves the utilization rate of the abrasive, and reduces the grinding cost of the spherical workpiece.

[0036] In order to achieve the effect of detachable connection between the mounting ring seat 2 and the mounting ring groove 21, refer to Figures 1 to 6, the outer side of the mounting ring seat 2 is sleeved with a connecting ring seat 5 and a clamping ring seat 6, the connecting ring seat 5 and the mounting ring seat 2 are integrally formed, and the clamping ring seat 6 is detachably connected to the mounting ring groove 21. The connecting ring seat 5 and the clamping ring seat 6 are both coaxially arranged with the mounting ring seat 2, the inner ring wall of the mounting ring seat 2 fits with the inner ring wall of the mounting ring groove 21, and the outer ring wall of the connecting ring seat 5 fits with the outer ring wall of the mounting ring groove 21. When the clamping ring seat 6 abuts the connecting ring seat 5 in the mounting ring groove 21, the opposite surface of the mounting ring seat 2 protrudes from the opposite surface of the clamping ring seat 6, which facilitates the fitting of the spherical workpiece with the abrasive groove 4, so that the clamping ring seat 6 is not easy to contact the spherical workpiece, and the situation of the reduction of the processing accuracy of the spherical workpiece is reduced. A plurality of limiting grooves 51 are provided at one end of the connecting ring seat 5 away from the clamping ring seat 6, and a plurality of limiting rods 52 are installed on the inner wall of the mounting ring groove 21, and the limiting grooves 51 are for the limiting rods 52 to be inserted. When the mounting ring seat 2 is fixed in the mounting ring groove 21, the limiting rod 52 is inserted in the limiting groove 51, so that the connecting ring seat 5, the mounting ring seat 2 and the mounting ring groove 21 are not easy to rotate relative to each other. When the abrasive groove 4 rubs against the spherical workpiece, the mounting ring seat 2 is not easy to move synchronously with the spherical workpiece. The outer wall of the clamping ring seat 6 is provided with an external thread groove 61, and the inner wall of the mounting ring groove 21 is provided with an internal thread groove 62. The external thread groove 61 and the internal thread groove 62 cooperate with each other, so that the clamping ring seat 6 is threadedly connected with the mounting ring groove 21. When the mounting ring seat 2 is fixed in the mounting ring groove 21, the clamping ring seat 6 is threadedly connected with the mounting ring groove 21, and the clamping ring seat 6 abuts the connecting ring seat 5 in the mounting ring groove 21, and the limiting rod 52 is inserted in the limiting groove 51. When taking the mounting ring seat 2 out of the mounting ring groove 21 , firstly screw the clamping ring seat 6 out of the mounting ring groove 21 , and then pull the mounting ring seat 2 out of the mounting ring groove 21 .

[0037] In order to reduce the number of unqualified spherical workpieces, refer to Figures 1 to 6, a positioning groove 91 is provided at the top center of the lower grinding disc 12, and a pressure sensor 92 is installed on the inner wall of the positioning groove 91. A positioning rod 9 is installed at the bottom center of the upper grinding disc 11, and a rubber layer 93 is wrapped around the outer wall of the positioning rod 9. The positioning groove 91 is for the positioning rod 9 to be inserted, and the rubber layer 93 is used to abut against the pressure sensor 92, and the pressure sensor 92 is used to detect the force of the positioning rod 9 on the inner wall of the positioning groove 91. When the upper grinding disc 11 and the lower grinding disc 12 rotate relative to each other to grind the spherical workpiece, the positioning rod 9 is inserted in the positioning groove 91. When the median perpendicular line of the upper grinding disc 11 and the lower grinding disc 12 coincide, the positioning rod 9 rotates coaxially with the positioning groove 91, and the distance between the outer wall of the positioning rod 9 and the pressure sensor 92 is always the same, and the pressure value detected by the pressure sensor 92 is consistent. When the median perpendicular line of the upper grinding disc 11 and the lower grinding disc 12 is misaligned, the positioning rod 9 rotates eccentrically relative to the positioning groove 91, and the distance between the outer wall of the positioning rod 9 and the pressure sensor 92 changes, and the pressure value detected by the pressure sensor 92 fluctuates. When the pressure value detected by the pressure sensor 92 fluctuates, the pressure sensor 92 feedbacks a signal to stop the driving motor 7, thereby reducing the situation where the abrasive groove 4 is misaligned and causes the spherical workpiece to be processed unqualified, thereby reducing the grinding cost of the spherical workpiece. When the distance between the outer wall of the positioning rod 9 and the pressure sensor 92 changes, the positioning rod 9 changes the pressure value detected by the pressure sensor 92 by squeezing the rubber layer 93, thereby reducing the situation where the positioning rod 9 directly squeezes the pressure sensor 92 and causes the pressure sensor 92 to be damaged.

[0038] The implementation principle of a high-precision outer curved surface grinding machine in the embodiment of the present application is as follows: a spherical workpiece is placed in the abrasive groove 4 of the lower grinding disc 12, and then the output shaft of the lifting hydraulic rod 8 drives the upper grinding disc 11, so that the upper grinding disc 11 and the lower grinding disc 12 are close to each other, until the spherical workpiece fits the abrasive groove 4 of the upper grinding disc 11, and then the driving motor 7 drives the lower grinding disc 12 to rotate, so that the upper grinding disc 11 and the lower grinding disc 12 rotate relative to each other. By utilizing the revolution of the grinding disc, the rotation of the spherical workpiece and the centrifugal force of rotation, the outer surface of the spherical workpiece is polished, and the spherical rate accuracy of the outer curved surface of the spherical workpiece is improved. Since the abrasive layer 3 in the mounting ring seat 2 is selected according to the material of the spherical workpiece, and the abrasive groove 4 in the abrasive layer 3 is customized according to the size of the spherical workpiece, the upper grinding disc 11 and the lower grinding disc 12 can be adapted to different spherical workpieces by replacing the mounting ring seat 2 without replacing the upper grinding disc 11 and the lower grinding disc 12 as a whole. At the same time, the abrasive is only applied to the abrasive layer 3 in contact with the spherical workpiece, which reduces the loss of the abrasive, improves the utilization rate of the abrasive, and reduces the grinding cost of the spherical workpiece.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision external curved surface grinding machine, comprising a machine base (1), wherein the machine base (1) is provided with an upper grinding disc (11) and a lower grinding disc (12), wherein the upper grinding disc (11) is located directly above the lower grinding disc (12), and wherein: The upper grinding disc (11) and the lower grinding disc (12) are provided with a plurality of mounting annular grooves (21) on their opposing surfaces. The upper grinding disc (11) and the lower grinding disc (12) are coaxially arranged with the mounting annular grooves (21). A mounting annular seat (2) is detachably arranged in the mounting annular grooves (21). An abrasive groove (31) is provided on the opposing surface of the mounting annular seat (2). An abrasive layer (3) is provided on the inner wall of the abrasive groove (31). An abrasive groove (4) is provided on the opposing surface of the abrasive layer (3).

2. A high-precision external curved surface grinding machine according to claim 1, characterized in that: A connecting ring seat (5) and a clamping ring seat (6) are arranged between the outer wall of the mounting ring seat (2) and the inner wall of the mounting ring groove (21); the clamping ring seat (6) is used to abut the connecting ring seat (5) against the mounting ring groove (21); the inner wall of the connecting ring seat (5) is fixedly connected to the outer wall of the mounting ring seat (2); and the outer wall of the clamping ring seat (6) is detachably connected to the inner wall of the mounting ring groove (21).

3. A high-precision external curved surface grinding machine according to claim 2, characterized in that: The opposite surface of the mounting ring seat (2) protrudes from the opposite surface of the pressing ring seat (6).

4. A high-precision external curved surface grinding machine according to claim 2, characterized in that: An external thread groove (61) is formed on the outer wall of the clamping ring seat (6), and an internal thread groove (62) is formed on the inner wall of the mounting ring groove (21), and the external thread groove (61) and the internal thread groove (62) cooperate with each other.

5. The high-precision outer curved surface grinding machine according to claim 2, characterized in that: A plurality of limiting grooves (51) are provided at one end of the connecting ring seat (5) away from the clamping ring seat (6), a plurality of limiting rods (52) are fixedly arranged on the inner wall of the mounting ring groove (21), and the limiting grooves (51) are used for inserting the limiting rods (52).

6. The high-precision outer curved surface grinding machine according to claim 1, characterized in that: A driving groove (71) is provided on the top of the machine base (1), a driving motor (7) is fixedly arranged in the driving groove (71), an output shaft of the driving motor (7) is fixedly connected to the center of the bottom of the lower grinding disc (12), a plurality of lifting grooves (81) are provided on the side wall of the machine base (1), a lifting hydraulic rod (8) is fixedly arranged in the lifting groove (81), and an output shaft of the lifting hydraulic rod (8) is fixedly connected to the bottom of the upper grinding disc (11).

7. A high-precision external curved surface grinding machine according to claim 6, characterized in that: A positioning groove (91) is provided at the center of the top of the lower grinding disc (12), and a pressure sensor (92) is fixedly arranged on the inner wall of the positioning groove (91). A positioning rod (9) is fixedly arranged at the center of the bottom of the upper grinding disc (11), and the positioning groove (91) is used for inserting the positioning rod (9), and the pressure sensor (92) is used to detect the force exerted by the positioning rod (9) on the inner wall of the positioning groove (91).

8. A high-precision external curved surface grinding machine according to claim 7, characterized in that: A rubber layer (93) is fixedly disposed on the outer wall of the positioning rod (9), and the rubber layer (93) is used to abut against the pressure sensor (92).

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