CN117047652A - Self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for internal spline - Google Patents
Self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for internal spline Download PDFInfo
- Publication number
- CN117047652A CN117047652A CN202311183008.1A CN202311183008A CN117047652A CN 117047652 A CN117047652 A CN 117047652A CN 202311183008 A CN202311183008 A CN 202311183008A CN 117047652 A CN117047652 A CN 117047652A
- Authority
- CN
- China
- Prior art keywords
- base
- centering
- magnet ring
- bearing
- internal spline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000227 grinding Methods 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 abstract description 4
- 238000006386 neutralization reaction Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000036316 preload Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/27—Work carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
Abstract
The invention discloses a self-centering and adjustable pre-tightening force type ultrasonic vibration grinding clamp for an internal spline, which relates to the technical field of grinding processing and comprises a base and a cross connecting piece arranged above the base, wherein a stepping motor is arranged below the cross connecting piece, a connector is arranged on an output shaft of the stepping motor, the connector is connected with the output shaft through a set screw, and an internal magnet ring is arranged on the side wall of the connector; a bearing seat is arranged above the base, a bearing is arranged above the bearing seat, an inner ring is arranged below the bearing, an outer magnet ring is arranged on the inner ring of the inner ring, and the outer magnet ring is arranged outside the inner magnet ring; the bearing top is provided with the chuck base, and chuck base top is provided with the three-jaw chuck, is provided with the work piece on the three-jaw chuck, is provided with the internal spline in the work piece. The invention is used for grinding processing, reduces the neutralization grinding time and improves the workpiece material removal rate during grinding.
Description
Technical Field
The invention relates to the technical field of grinding processing, in particular to a self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for an internal spline.
Background
An internal spline is a connection for transmitting torque and is commonly used as a rotating component in aerospace devices. In the aerospace field, the accuracy and reliability of internal splines are critical to ensuring the safety and performance of a spacecraft. The internal spline transmission can bear high torque transmission, and the design of the internal spline enables the spline to have larger contact area when transmitting torque, so that higher torque load can be borne. The gear can deform after heat treatment in the internal spline machining and manufacturing, and for grinding of small-size hardened internal splines, the existing machining mode adopts a manual centering and manual grinding mode, so that the problems that the dimensional accuracy is difficult to guarantee, the quality consistency is poor, the machining efficiency is low and the like exist, and the mass production requirement cannot be met.
Disclosure of Invention
The invention aims to provide a self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for an internal spline, which solves the problems of low grinding accuracy and low machining efficiency of the existing manual internal spline.
In order to achieve the above purpose, the invention provides a self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for an internal spline, which comprises a base and a cross connecting piece arranged above the base, wherein a stepping motor is arranged below the cross connecting piece, a connector is arranged on an output shaft of the stepping motor, the connector is connected with the output shaft through a set screw, and an internal magnet ring is arranged on the side wall of the connector; a bearing seat is arranged above the base, a bearing is arranged above the bearing seat, an inner ring is arranged below the bearing, an outer magnet ring is arranged on the inner ring of the inner ring, and the outer magnet ring is arranged outside the inner magnet ring; the bearing is characterized in that a chuck base is arranged above the bearing, a three-jaw chuck is arranged above the chuck base, a workpiece is arranged on the three-jaw chuck, and an internal spline is arranged in the workpiece.
Preferably, eight corresponding magnet blocks are respectively arranged on the inner magnet ring and the outer magnet ring, and the N pole and the S pole of the magnet blocks are alternately arranged.
Preferably, the cross connecting piece is connected with the stepping motor through a first screw, the bearing seat and the cross connecting piece are connected with the base through a second screw, and the chuck base and the three-jaw chuck are connected through three phases of screws.
Preferably, the cross connecting piece comprises an inner annular piece and four connecting rods arranged outside the annular piece, through holes are formed in the four connecting rods, and threaded holes are formed in the annular piece.
Preferably, the base is of a cylindrical structure, four connecting blocks are arranged at the lower part of the base, and U-shaped grooves are formed in the four connecting blocks.
The self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for the internal spline has the advantages that:
(1) Automatic centering function: a camera is arranged on the Z axis of the machine tool, a workpiece is photographed, and the rotation angle is calculated through a graphic processing technology, so that automatic centering is realized. The adjusting time is greatly shortened, and the accurate alignment of the internal spline and the grinding rod is ensured, so that the grinding speed and accuracy are improved.
(2) Adjustable pretightening force: the clamp is provided with the adjustable pre-tightening mechanism, the pre-tightening force of the clamp to the workpiece can be adjusted according to the flow rate of the grinding fluid, the direction of the pre-tightening force can be changed by changing the rotation direction of the stepping motor, and two side faces of the internal spline are ground. This function helps to maintain a stable workpiece material removal rate during the grinding process, avoiding the problem of low grinding efficiency caused by grinding rod wear.
(3) The grinding removal rate is improved and the time is saved: the self-centering function effectively reduces the centering time of the grinding rod and the internal spline, and improves the material removal rate during grinding.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic illustration of the use of a self-centering and adjustable pretension internal spline ultrasonic vibration grinding clamp of the present invention;
FIG. 2 is a schematic diagram of an embodiment of a self-centering and adjustable preload type internal spline ultrasonic vibration grinding jig according to the present invention;
FIG. 3 is a cross-sectional view of an embodiment of a self-centering and adjustable preload type internal spline ultrasonic vibration milling fixture in accordance with the present invention;
FIG. 4 is a top view of an embodiment of a self-centering and adjustable preload type internal spline ultrasonic vibration milling fixture in accordance with the present invention;
FIG. 5 is a schematic view of the cross connector of the self-centering and adjustable pre-tightening type internal spline ultrasonic vibration grinding clamp;
FIG. 6 is a schematic view of a magnet ring set of a self-centering and adjustable pre-tightening type internal spline ultrasonic vibration grinding fixture according to the present invention;
FIG. 7 is a schematic view of a combined structure of an internal spline and a grinding rod of a self-centering and adjustable pretightening type internal spline ultrasonic vibration grinding fixture;
FIG. 8 is an enlarged view of a portion of the structure of FIG. 7;
FIG. 9 is a schematic view of the structure of a grinding rod of a self-centering and adjustable pre-tightening type internal spline ultrasonic vibration grinding fixture;
FIG. 10 is a schematic view of a profile image of a workpiece internal spline of a self-centering and adjustable pretightening type internal spline ultrasonic vibration grinding fixture;
FIG. 11 is an enlarged view of a portion of the structure of FIG. 10;
FIG. 12 is a schematic view of the image overlays of FIGS. 9 and 10;
reference numerals: 1. a base; 2. a stepping motor; 3. a bearing seat; 4. a cross-shaped connecting piece; 5. a chuck base; 6. a three-jaw chuck; 7. a connector; 8. a bearing; 9. an inner ring; 10. an outer magnet ring; 11. an inner magnet ring; 12. a claw; 13. a workpiece; 14. a first screw; 15. a second screw; 16. a third screw; 17. a set screw; 18. a connecting block; 19. a U-shaped groove; 20. a grinding rod; 21. grinding fluid; 22. the Z axis of the machine tool; 23. a camera; 24. a clamp body; 25. a connecting rod; 26. a ring member; 27. a machine tool; 28. intersection one; 29. intersecting points II; 30. a midpoint; 31. a first reference line segment; 32 reference line segment two; 33. involute of internal spline; 34. a geometric center; 35. and the internal spline is root round.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Examples
Referring to fig. 1-12, fig. 1 is a schematic diagram illustrating an ultrasonic vibration grinding fixture for self-centering and adjustable pretightening force type internal spline according to the present invention, which comprises a machine tool 27, a camera 23 fixedly mounted on a Z-axis 22 of the machine tool, and a grinding rod 20 disposed on the Z-axis 22 of the machine tool, wherein a fixture body 24 is disposed on the machine tool 27. The camera 23 is used for photographing, and the clamp body 24 is used for clamping the workpiece 13 and providing a pretightening force.
The invention provides a self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for an internal spline, wherein a clamp body 24 comprises a base 1 and a cross connecting piece 4 arranged above the base. The cross connecting piece 4 comprises an annular piece 26 and four connecting rods 25, wherein the annular piece 26 is arranged outside the annular piece 26, threaded holes are formed in the annular piece 26, through holes are formed in the connecting rods 25, and bolts penetrate through the through holes to be fixed. A step motor 2 is arranged below the cross connecting piece 4, the step motor 2 is connected with the cross connecting piece 4 through a first screw 14, a connector 7 is arranged on an output shaft of the step motor 2, the connector 7 is connected with the output shaft of the step motor 2 through a set screw 17, an inner magnet ring 11 is arranged on the side wall of the connector 7, and the inner magnet ring 11 is glued with the connector 7; a bearing seat 3 is arranged above the base, the bearing seat 3 is arranged above the base, and a cross connecting piece 4 is connected with the base 1 through a second screw 15; the bearing seat 3 top is provided with bearing 8, and bearing 8 is provided with inner ring 9 with bearing 3 interference connection below, and inner ring 9 is provided with outer magnet ring 10 with the inner ring 9 interference connection, and outer magnet ring 10 bonds with inner ring 9, and inner magnet ring 11 constitutes a magnet ring group with outer magnet ring 10. A chuck base 5 is arranged above the bearing, the chuck base 5 is in interference connection with the bearing 8, a three-jaw chuck 6 is arranged above the chuck base 5, and the chuck base 5 is connected with the three-jaw chuck 6 through a screw III 16; a workpiece 13 is arranged in the middle of the three-jaw chuck 6, an internal spline is arranged in the workpiece 13, and the workpiece 13 is clamped by the jaws 12; a camera 23 is provided on the machine tool Z axis 22 for taking a photograph for centering.
The magnet ring group comprises an outer magnet ring 10 and an inner magnet ring 11, eight corresponding magnet blocks are respectively arranged on the inner magnet ring 11 and the outer magnet ring 10, and N poles and S poles of the magnet blocks in the inner magnet ring and the outer magnet ring are alternately arranged in the direction of the S poles, as shown in fig. 6.
The base 1 is of a cylindrical structure, four connecting blocks 18 are arranged at the lower part of the base 1, and U-shaped grooves 19 are formed in the four connecting blocks 18. The U-shaped groove 19 is formed in the connecting block 18 to facilitate the fixing of the clamp body 24.
When the device is particularly used, the camera 23 arranged on the Z axis 22 of the machine tool 27 photographs the workpiece 13 on the clamp body 24, and the collected images of the spline contours in the workpiece 13 are subjected to preprocessing operations including denoising, enhancement, normalization and the like, so that the accuracy of subsequent processing is improved. The processed image is obtained by the following operations:
(1) Firstly, an internal spline contour image in the workpiece 13 is read and converted into a gray image, and Gaussian blur and binarization processing are carried out on the gray image to reduce noise points.
(2) And (3) carrying out edge detection on the internal spline of the workpiece 13 by applying a canny operator, finding out the outline of the image, obtaining an internal spline root circle 35 by fitting outline points, and obtaining an image geometric center 34 according to the internal spline root circle 35. Two points where the internal spline root circle 35 and the internal spline involute 33 intersect are respectively an intersection point I28 and an intersection point II 29, a midpoint 30 of the intersection point I28 and the intersection point II 29 is taken and connected with the geometric center 34, and the line is taken as a reference line segment I31. As shown in fig. 10. Similarly, a reference line segment two 32 is drawn on the contour image of the grinding rod 20, as shown in fig. 9.
(3) And (3) superposing the images processed in the step (2) and the images processed in the step (9) and the step (10) and overlapping geometric center points, and calculating an included angle alpha between the first reference line segment 31 and the second reference line segment 32.
(4) And the clamp rotates clockwise or anticlockwise by an angle alpha according to the actual condition, so that the grinding rod and the internal spline of the workpiece are centered.
The distance between the grinding rod 20 and the inner spline surface of the workpiece 13 influences the material removal rate of the workpiece surface in the grinding process, when the grinding rod 20 stretches into the workpiece 13, the stepping motor 2 is controlled to rotate by a certain angle through the controller, the stepping motor 2 drives the magnet ring group to rotate, so that the three-jaw chuck rotates, the inner spline of the workpiece 13 and the grinding rod 20 have certain pretightening force, the pretightening force is adjusted according to the flow velocity of grinding fluid, and dry friction between the grinding rod 20 and the inner spline of the workpiece 13 is avoided. By adjusting the rotation direction of the stepping motor 2, the two side faces of the internal spline of the workpiece 13 can be preloaded, so that the grinding speed is increased. As shown in fig. 7 and 8, the gap between the workpiece 13 and the polishing rod 20 is filled with a polishing liquid 21.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (5)
1. The utility model provides a self-centering and adjustable pretightning force formula internal spline ultrasonic vibration grinds anchor clamps which characterized in that: the device comprises a base and a cross connecting piece arranged above the base, wherein a stepping motor is arranged below the cross connecting piece, a connector is arranged on an output shaft of the stepping motor, the connector is connected with the output shaft through a set screw, and an inner magnet ring is arranged on the side wall of the connector; a bearing seat is arranged above the base, a bearing is arranged above the bearing seat, an inner ring is arranged below the bearing, an outer magnet ring is arranged on the inner ring of the inner ring, and the outer magnet ring is arranged outside the inner magnet ring; the bearing is characterized in that a chuck base is arranged above the bearing, a three-jaw chuck is arranged above the chuck base, a workpiece is arranged on the three-jaw chuck, and an internal spline is arranged in the workpiece.
2. The self-centering and adjustable pretightening force type ultrasonic vibration grinding fixture for internal splines, as set forth in claim 1, is characterized in that: eight corresponding magnet blocks are respectively arranged on the inner magnet ring and the outer magnet ring, and N poles and S poles of the magnet blocks are alternately arranged.
3. The self-centering and adjustable pretightening force type ultrasonic vibration grinding fixture for internal splines, as set forth in claim 2, is characterized in that: the cross connecting piece with step motor passes through screw one and is connected, the bearing frame with the cross connecting piece all pass through screw two with the base is connected, chuck base with three-jaw chuck passes through screw three-phase connection.
4. A self-centering and adjustable pretightening force type internal spline ultrasonic vibration grinding fixture according to claim 3, characterized in that: the cross connecting piece comprises an inner annular piece and four connecting rods arranged outside the annular piece, through holes are formed in the four connecting rods, and threaded holes are formed in the annular piece.
5. The self-centering and adjustable pretightening force type ultrasonic vibration grinding fixture for internal splines, as set forth in claim 4, is characterized in that: the base is of a cylindrical structure, four connecting blocks are arranged at the lower part of the base, and U-shaped grooves are formed in the four connecting blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311183008.1A CN117047652A (en) | 2023-09-13 | 2023-09-13 | Self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for internal spline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311183008.1A CN117047652A (en) | 2023-09-13 | 2023-09-13 | Self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for internal spline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117047652A true CN117047652A (en) | 2023-11-14 |
Family
ID=88655437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311183008.1A Pending CN117047652A (en) | 2023-09-13 | 2023-09-13 | Self-centering and adjustable pretightening force type ultrasonic vibration grinding clamp for internal spline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117047652A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3249423A1 (en) * | 1982-08-03 | 1984-10-04 | Wilhelm G. 8510 Fürth Scheller | STORAGE WITH MAGNETIC RING |
| DE102009047996B3 (en) * | 2009-09-22 | 2011-03-17 | SAV Spann-, Automations-, Normteiletechnik GmbH | Chuck for e.g. clamping, of circularly formed workpiece, has path measuring systems provided for positioning jaws, where actuators, measuring systems and force sensors are connected with control device that is component part of chuck |
| CN103346659A (en) * | 2013-06-17 | 2013-10-09 | 宝鸡泰华磁机电技术研究所有限公司 | Internal radiation ring type static speed-adjusting permanent magnetic coupling |
| CN105526270A (en) * | 2016-01-18 | 2016-04-27 | 西安交通大学 | Quasi-zero stiffness coupling |
| CN106239355A (en) * | 2015-06-04 | 2016-12-21 | 株式会社捷太格特 | Magnechuck and the Multifunctional grinder with magnechuck |
| CN110653386A (en) * | 2019-10-24 | 2020-01-07 | 高璐 | Power chuck assembly |
| CN110976933A (en) * | 2019-12-10 | 2020-04-10 | 安庆师范大学 | Machine tool for mechanical finish machining |
| CN111002193A (en) * | 2019-12-25 | 2020-04-14 | 上海建工集团股份有限公司 | Surface finish machining equipment and method for large-diameter pipe |
| CN210882564U (en) * | 2019-09-30 | 2020-06-30 | 青岛海洋科学与技术国家实验室发展中心 | Underwater vehicle and tail vane adjusting mechanism based on linear transmission |
| CN111975625A (en) * | 2020-08-27 | 2020-11-24 | 萧思丽 | Refined inner ring and outer ring polishing system for metal piston ring |
| CN213676230U (en) * | 2020-11-13 | 2021-07-13 | 东营鑫博瑞智能科技有限公司 | Magnetic wheel special for wall-climbing robot |
| CN213889542U (en) * | 2020-11-21 | 2021-08-06 | 重庆鼎华机械有限公司 | A grinder for bolt mould processing |
| CN115102363A (en) * | 2022-06-13 | 2022-09-23 | 中国船舶重工集团公司第七一九研究所 | Coupling for condensate pump |
| CN115157114A (en) * | 2022-08-01 | 2022-10-11 | 永红保定铸造机械有限公司 | Rotating mechanism for casting grinding |
-
2023
- 2023-09-13 CN CN202311183008.1A patent/CN117047652A/en active Pending
Patent Citations (14)
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|---|---|---|---|---|
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| DE102009047996B3 (en) * | 2009-09-22 | 2011-03-17 | SAV Spann-, Automations-, Normteiletechnik GmbH | Chuck for e.g. clamping, of circularly formed workpiece, has path measuring systems provided for positioning jaws, where actuators, measuring systems and force sensors are connected with control device that is component part of chuck |
| CN103346659A (en) * | 2013-06-17 | 2013-10-09 | 宝鸡泰华磁机电技术研究所有限公司 | Internal radiation ring type static speed-adjusting permanent magnetic coupling |
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| CN210882564U (en) * | 2019-09-30 | 2020-06-30 | 青岛海洋科学与技术国家实验室发展中心 | Underwater vehicle and tail vane adjusting mechanism based on linear transmission |
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| CN115102363A (en) * | 2022-06-13 | 2022-09-23 | 中国船舶重工集团公司第七一九研究所 | Coupling for condensate pump |
| CN115157114A (en) * | 2022-08-01 | 2022-10-11 | 永红保定铸造机械有限公司 | Rotating mechanism for casting grinding |
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