CN113931994A - Harmonic reducer flexible gear, micro-texture machining device and method - Google Patents
Harmonic reducer flexible gear, micro-texture machining device and method Download PDFInfo
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- CN113931994A CN113931994A CN202111299604.7A CN202111299604A CN113931994A CN 113931994 A CN113931994 A CN 113931994A CN 202111299604 A CN202111299604 A CN 202111299604A CN 113931994 A CN113931994 A CN 113931994A
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- flexible gear
- main body
- gear
- flexible
- support
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
- F16H57/0431—Means for guiding lubricant directly onto a tooth surface or to foot areas of a gear, e.g. by holes or grooves in a tooth flank
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Retarders (AREA)
Abstract
A harmonic reducer flexible gear, a micro-texture processing device and a method thereof comprise a flexible gear main body and a micro-texture; the micro-texture is a plurality of grooves uniformly distributed on the inner surface of the flexible gear main body along the circumferential direction, or the micro-texture is a plurality of pits distributed on the inner surface of the flexible gear main body along the circumferential direction. The micro-texture processing device comprises a mobile platform, a motor, a hob, a flexible gear support frame and a support gear; the motor is installed on the moving platform, the hob is installed on an output shaft of the motor, the flexible gear body is positioned by a flexible gear support frame fixed on the base, the support gear is fixed on the gear support frame, the gear support frame is fixed on the base, the hob is arranged on the inner surface of the flexible gear body to realize the processing of micro-texture, and the flexible gear body can rotate relative to the flexible gear support frame and the support gear. The microtexture can well store the lubricant and dredge the lubricating medium, so that the surface of the friction pair can continuously keep good lubrication, and the performance of the flexible gear is improved.
Description
Technical Field
The invention relates to a harmonic reducer flexible gear, in particular to a harmonic reducer flexible gear, a micro-texture processing device and a method.
Background
The invention relates to a harmonic reducer transmission, which is invented by inventor C.W.Musser in 1955, is a transmission mode for performing transmission or power transmission by utilizing elastic deformation generated by a flexible gear, and breaks through a mode that mechanical transmission adopts rigid machinery. The flexible gear is used as an important part in the harmonic reducer and is also a part with the most complex stress, fatigue failure is most likely to occur, and the working life of the flexible gear determines the working life of the harmonic reducer. Therefore, how to improve the performance of the flexible gear, reduce the friction loss of the flexible gear and improve the efficiency and the precision of the harmonic reducer has important significance.
Disclosure of Invention
The invention provides a device and a method for processing a flexible gear and a micro-texture of a harmonic reducer, which are used for overcoming the defects of the prior art.
A harmonic reducer flexible gear comprises a flexible gear main body and a micro-texture; the micro-texture is a plurality of grooves uniformly distributed on the inner surface of the flexible gear main body along the circumferential direction, or the micro-texture is a plurality of pits distributed on the inner surface of the flexible gear main body along the circumferential direction; the grooves or dimples are disposed on the inner surface of the flex spline body corresponding to the flex spline teeth.
A harmonic reducer flexible gear microtexture processing device comprises a mobile platform, a motor, a hob, a flexible gear support frame and a support gear; the motor is installed on the moving platform, the hob cutter is installed on an output shaft of the motor, the flexible gear body is positioned by a flexible gear support frame fixed on the base, flexible gear teeth on the outer side surface of the flexible gear body are meshed with a support gear, the support gear is fixed on the gear support frame, the gear support frame is fixed on the base, the hob cutter is arranged on the inner surface of the flexible gear body to realize the processing of micro-textures, and the flexible gear body can rotate relative to the flexible gear support frame and the support gear.
A method for processing a flexible gear microtexture of a harmonic reducer comprises the following steps:
firstly, preparing a prefabricated flexible gear main body;
secondly, preprocessing a flexible gear main body: removing oil stains on the surface of the flexible gear main body;
thirdly, clamping: the flexible gear main body is supported by the flexible gear support frame and is in contact with the support gear, the hob is connected with the output shaft of the motor and is arranged on the moving platform, the hob is in contact with the flexible gear main body, so that the flexible gear main body is driven by the hob to rotate stably, the reciprocating movement of the sliding platform is controlled by the spiral micrometer head, the movement of the motor is further controlled, and the hob 7 is enabled to be close to the inner surface of the flexible gear main body and to extrude the flexible gear main body so that the teeth of the flexible gear are meshed with the support gear;
fourthly, processing: starting a motor, and rolling micro textures with consistent depth on the inner surface of the flexible gear main body 1;
fifthly, unloading: and after the rolling is finished, reversing the spiral micrometer head to enable the hob to be far away from the inner surface of the flexible gear main body, and finishing the processing.
Compared with the prior art, the invention has the beneficial effects that:
the inner wall surface of the flexible gear main body is provided with the strip-shaped groove or the pit micro-texture, and the micro-texture arranged on the inner wall surface can effectively reduce the serious abrasion generated under the grease friction condition, improve the efficiency and the precision of the harmonic reducer and reduce the noise and the vibration. The micro-texture surface can store oil liquid, provide secondary lubrication for the surface of the friction pair, and simultaneously can store abrasive dust and abrasive particles, effectively avoid the damage of the abrasive dust to the inner wall of the flexible gear and the outer ring of the flexible bearing of the wave generator, and prolong the service life.
According to the invention, regularly arranged grooves or pits are rolled on the inner surface of the flexible gear main body by adopting the hob, and under the action of the lubricant, the microtexture can well store the lubricant and dredge the lubricating medium, so that the surface of the friction pair can be kept well lubricated continuously. Compared with the inner surface of the non-texture flexible gear main body, the micro-texture surface can reduce the friction coefficient of the friction surface by 20 percent, reduce the surface temperature by 15 percent and prolong the service life of the harmonic reducer by more than 30 percent.
The technical scheme of the invention is further explained by combining the drawings and the embodiment:
drawings
FIG. 1 is a structural diagram of a harmonic reducer flexspline with a microtexture on the inner wall surface according to the present invention;
FIG. 2 is a schematic diagram illustrating an arrangement of elongated grooves in an embodiment;
FIG. 3 is a cross-sectional view of an embodiment of an elongated trench;
FIG. 4 is a schematic diagram of an arrangement of circular dimples in an embodiment;
FIG. 5 is a sectional view of a circular dimple of an embodiment;
FIG. 6 is a schematic diagram of the composite arrangement of the long grooves and the circular pits in the embodiment;
FIG. 7 is a schematic view of the embodiment showing the elongated grooves arranged obliquely after being unfolded;
FIG. 8 is a schematic structural view of a microtexturing apparatus according to the present invention;
FIG. 9 is a plan view of the microtexture processing apparatus of the present invention;
FIG. 10 is a schematic view of a flexspline support of the present invention;
FIG. 11 is a cross-sectional view of the support shaft of the present invention;
fig. 12 is a schematic view of the hob provided by the present invention.
Detailed Description
As shown in fig. 1, the flexspline of the harmonic reducer according to the present embodiment includes a flexspline body 1 and a microtexture 3; the micro-texture 3 is a plurality of grooves 3-1 uniformly distributed on the inner surface of the flexible gear main body 1 along the circumferential direction, or the micro-texture is a plurality of pits 3-2 distributed on the inner surface of the flexible gear main body 1 along the circumferential direction; the grooves 3-1 or dimples 3-2 are arranged on the inner surface of the flexspline body 1 corresponding to the flexspline teeth.
The flexible gear body 1 is an important component of the harmonic reducer, and can achieve the purpose of transmission by utilizing the elastic deformation motion of the flexible gear, so that the flexible gear is easy to generate fatigue failure in periodic motion, and the surface of a bearing of a wave generator is abraded.
In embodiment 1, the length direction of each groove 3-1 is arranged in the axial direction of the flexspline body 1.
In embodiment 2, the plurality of grooves 3-1 are arranged obliquely in the longitudinal direction of the flexspline body 1 after being unfolded. So set up, the slot sets up along the axis with the slope sets up, convenient processing, easily abrasive dust storage.
Embodiment 3, on the basis of embodiment 1, each groove 3-1 is further provided with a plurality of pits 3-2, and the pits 3-2 are circular pits. The storage of oil and abrasive dust is greatly improved due to the combined design of the grooves 3-1 and the pits 3-2.
Example 4, based on example 1 or 2, the area occupancy of the microtexture 3 on the inner wall surface 11 of the flexspline body 1 is 20% to 40%.
Example 5, on the basis of example 1, the depth of each trench 3-1 is 20-50 microns, and the width of the end opening is 100-200 microns. So set up, adaptability is good, and little texture surface can store fluid, provides "secondary lubrication" for the vice surface of friction, simultaneously, can store the abrasive dust grit.
Example 6, based on the above embodiment, the pits 3-2 were circular pits, and each pit 3-2 had a diameter of 50 to 200 micrometers and a depth of 20 to 50 micrometers. The adaptability is good, the micro-texture surface can store oil liquid, secondary lubrication is provided for the surface of the friction pair, and meanwhile, abrasive dust and abrasive particles can be stored.
As shown in fig. 8-9, in a second embodiment, there is further provided a micro-texture processing device for a flexible gear of a harmonic reducer, comprising a moving platform 13, a motor 12, a hob 7, a flexible gear support frame 5 and a support gear 8;
the motor 12 is installed on the moving platform 13, the hob 7 is installed on an output shaft of the motor 12, the flexible gear body 1 is positioned by the flexible gear support frame 5 fixed on the base, flexible gear teeth on the outer side surface of the flexible gear body 1 are meshed with the support gear 8, the support gear 8 is fixed on the gear support frame 6, the gear support frame 6 is fixed on the base, the hob 7 is arranged on the inner surface of the flexible gear body 1 to realize the processing of micro-texture, and the flexible gear body 1 can rotate relative to the flexible gear support frame 5 and the support gear 8.
Further, as shown in fig. 8, the moving platform 13 includes a sliding platform 131, a fixed platform 132, an upper slide rail, a lower slide rail and a micrometer screw 133; the lower surface of the sliding platform 131 is provided with an upper sliding rail, the upper surface of the fixed platform 132 is provided with a lower sliding groove matched with the upper sliding rail, the upper surface of the fixed platform 132 is provided with a lower sliding rail, the lower surface of the sliding platform 131 is provided with an upper sliding groove matched with the lower sliding rail, the micrometer screw 133 is arranged on the fixed platform 132, the sliding platform 131 is driven by the micrometer screw 133, and the motor 12 is arranged on the sliding platform 131. The design of the movable platform 13, the sliding platform 131 is adjusted to move on the fixed platform 132 through the hand wheel 15, the flexible gear body 1 is sleeved on the three supporting shaft cylinders 4, the hand wheel 15 is rotated to drive the micrometer screw 133 to rotate, the sliding platform 131 is driven to translate on the fixed platform 132, the hob surface 17 of the hob 7 is made to approach the inner surface 11 of the flexible gear body 1 and extrude the inner surface 11, so that the flexible gear teeth 1-3 are meshed with the supporting gear 8; and starting the motor 12, and rolling the regular microtexture 3 with consistent depth on the inner surface 11 of the flexible gear body 1.
As shown in fig. 10 to 11, the flexspline support 5 includes a bracket 19, a base 22, and a support shaft 4; the support 19 is fixed on a base 22, the base 22 is fixed on a base, three support shaft cylinders 4 are arranged on the support 19, the flexspline main body 1 is supported and positioned by the three support shaft cylinders 4, and each support shaft cylinder 4 comprises a support shaft 24, an outer sleeve 29 and a rubber sleeve 25; the supporting shaft 24 is fixed on the bracket 19, the outer sleeve 29 is rotatably arranged on the supporting shaft 24, the outer side surface of the outer sleeve 29 is coated with the rubber sleeve 25, and the rubber sleeve 25 is contacted with the inner surface of the flexible wheel main body 1.
In fig. 10, the rib plate 18 is arranged on the bracket 19 to increase the rigidity and the stability of the bracket 19, and the upper end of the bracket 19 is provided with three threaded holes 20 for connecting with a threaded shaft 23 on the support shaft barrel 4; as shown in fig. 11, the outer sleeve 29 is connected to the support shaft 24 through bearings 26, one of which is fixed to the support shaft 24 through a sleeve 28 and a nut 27, and the rubber sleeve 25 effectively prevents the flexspline inner wall 11 from being scratched.
Based on the 2 implementation modes, the method for processing the flexible gear microtexture of the harmonic reducer comprises the following steps:
firstly, preparing a prefabricated flexible gear body 1;
secondly, preprocessing the flexible gear body 1: removing oil stains on the surface of the flexible gear body 1;
thirdly, clamping: the flexible gear main body 1 is supported by a flexible gear support frame 5 and is contacted with a support gear 8, a hob 7 is connected with an output shaft of a motor 12 and is arranged on a moving platform 13, the hob 7 is contacted with the flexible gear main body 1, so that the flexible gear main body 1 is driven by the hob 7 to rotate stably, the reciprocating movement of a sliding platform 131 is controlled by a spiral micrometer 133, the movement of the motor 12 is further controlled, the hob surface 17 of the hob 7 is close to the inner surface 11 of the flexible gear main body 1, and the flexible gear main body 1 is extruded to enable the flexible gear teeth 2 to be meshed with the support gear 8;
fourthly, processing: starting the motor 12, and rolling micro textures with consistent depth on the inner surface of the flexible gear body 1; the microtexture is a groove or a pit;
fifthly, unloading: after the rolling is finished, the screw micrometer 133 is reversed to make the hob 7 away from the inner surface of the flexible gear body 1, and the processing is finished. The microtexture can store a lubricant, avoid the occurrence of poor lubrication between the wave generator and the flexible gear main body 1, effectively reduce the serious abrasion between the inner wall of the flexible gear and the outer ring of the flexible bearing of the wave generator under the condition of grease friction, improve the efficiency and the precision of the harmonic reducer, reduce noise and vibration, and meanwhile, the rolling is a plastic processing method without cutting processing, can improve the surface quality of the inner wall of the flexible gear and improve the fatigue strength. By the processing device and the processing method, the groove and the pit microtexture are processed on the inner surface of the flexible gear body 1, so that the lubrication state between the inner surface of the flexible gear body 1 and the outer ring of the flexible bearing of the wave generator is improved, and the friction characteristic between two contact surfaces is improved.
The present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the invention.
Claims (10)
1. The utility model provides a harmonic speed reducer ware flexbile gear, contains flexbile gear main part (1), its characterized in that: also comprises microtexture (3); the micro-texture (3) is a plurality of grooves (3-1) uniformly distributed on the inner surface of the flexible gear main body (1) along the circumferential direction, or the micro-texture is a plurality of pits (3-2) distributed on the inner surface of the flexible gear main body (1) along the circumferential direction; the grooves (3-1) or the pits (3-2) are arranged on the inner surface of the flexible gear body (1) corresponding to the flexible gear teeth.
2. The harmonic reducer flexspline of claim 1, wherein: the length direction of each groove (3-1) is arranged along the axial direction of the flexible gear body (1).
3. The harmonic reducer flexspline of claim 1, wherein: the plurality of grooves (3-1) are obliquely arranged in the length direction after the flexible gear main body (1) is unfolded.
4. The harmonic reducer flexspline of claim 2, wherein: each groove (3-1) is also provided with a plurality of pits (3-2), and the pits (3-2) are circular pits.
5. The harmonic reducer flexspline of claim 2, wherein: the depth of each trench (3-1) is 20-50 microns, and the width of the end opening is 100-200 microns.
6. The harmonic reducer flexspline of claim 1, wherein: the pits (3-2) are circular pits, and each pit (3-2) has a diameter of 50-200 microns and a depth of 20-50 microns.
7. The utility model provides a little texture processingequipment of harmonic speed reducer ware flexbile gear which characterized in that: comprises a mobile platform (13), a motor (12), a hob (7), a flexible gear support frame (5) and a support gear (8);
the flexible gear mechanism is characterized in that a motor (12) is installed on a moving platform (13), a hobbing cutter (7) is installed on an output shaft of the motor (12), a flexible gear main body (1) is positioned by a flexible gear support frame (5) fixed on a base, flexible gear teeth on the outer side surface of the flexible gear main body (1) are meshed with a support gear (8), the support gear (8) is fixed on a gear support frame (6), the gear support frame (6) is fixed on the base, the hobbing cutter (7) is arranged on the inner surface of the flexible gear main body (1) to achieve micro-texture processing, and the flexible gear main body (1) can rotate relative to the flexible gear support frame (5) and the support gear (8).
8. The device for processing the soft gear microtexture of the harmonic reducer of claim 7, which is characterized in that: the moving platform (13) comprises a sliding platform (131), a fixed platform (132), an upper sliding rail, a lower sliding rail and a spiral micrometer head (133); install the slide rail on sliding platform (131) lower surface, fixed platform (132) upper surface processing has the lower spout with last slide rail matched with, install down the slide rail on fixed platform (132) upper surface, processing has the upper spout with lower slide rail matched with on sliding platform (131) lower surface, spiral micrometer head (133) are installed on fixed platform (132), sliding platform (131) are by spiral micrometer head (133) drive, install on sliding platform (131) motor (12).
9. The device for processing the flexspline of the harmonic reducer according to claim 7 or 8, wherein: the flexible gear support frame (5) comprises a support (19), a base (22) and a support shaft barrel (4); the flexible wheel main body (1) is supported and positioned by the three supporting shaft cylinders (4), and each supporting shaft cylinder (4) comprises a supporting shaft (24), an outer sleeve (29) and a rubber sleeve (25); the supporting shaft (24) is fixed on the support (19), the outer sleeve (29) is rotatably arranged on the supporting shaft (24), the outer side surface of the outer sleeve (29) is coated with the rubber sleeve (25), and the rubber sleeve (25) is in contact with the inner surface of the flexible gear body (1).
10. A method for processing a flexible gear microtexture of a harmonic reducer is characterized by comprising the following steps: the method comprises the following steps:
firstly, preparing a prefabricated flexible gear body (1);
secondly, preprocessing the flexible gear main body (1): removing oil stains on the surface of the flexible gear main body (1);
thirdly, clamping: the flexible gear main body (1) is supported by a flexible gear support frame (5) and is contacted with a support gear (8), a hob (7) is connected with an output shaft of a motor (12) and is arranged on a moving platform (13), the hob (7) is contacted with the flexible gear main body (1), so that the flexible gear main body (1) can stably rotate under the driving of the hob (7), the reciprocating movement of a sliding platform (131) is controlled by a spiral micrometer head (133), and the movement of the motor (12) is further controlled, so that the hob (7) is close to the inner surface of the flexible gear main body (1) and extrudes the flexible gear main body (1) to enable the flexible gear teeth (2) to be meshed with the support gear (8);
fourthly, processing: starting a motor (12), and rolling micro textures with consistent depth on the inner surface of the flexible gear main body (1);
fifthly, unloading: and after rolling, reversing the spiral micrometer head (133) to enable the hob (7) to be far away from the inner surface of the flexible gear main body (1), and finishing machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299604.7A CN113931994B (en) | 2021-11-04 | 2021-11-04 | Harmonic reducer flexspline, micro-texture processing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299604.7A CN113931994B (en) | 2021-11-04 | 2021-11-04 | Harmonic reducer flexspline, micro-texture processing device and method |
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| Publication Number | Publication Date |
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| CN113931994A true CN113931994A (en) | 2022-01-14 |
| CN113931994B CN113931994B (en) | 2023-04-25 |
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| US20170252843A1 (en) * | 2014-10-02 | 2017-09-07 | The Gleason Works | Axial hob with multi-revolution cutting teeth |
| CN205817618U (en) * | 2016-06-17 | 2016-12-21 | 湘潭大学 | A kind of emery wheel micro-texture features reconstruct topping machanism |
| CN107009199A (en) * | 2017-05-03 | 2017-08-04 | 宁波工程学院 | A kind of micro- texture manufacturing process of inner surface |
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| CN113280115A (en) * | 2021-06-24 | 2021-08-20 | 青岛理工大学 | Micro-texture piston ring and processing method |
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| Publication number | Publication date |
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| CN113931994B (en) | 2023-04-25 |
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