CN115213744B - Reinforced grinding multi-scale microstructure preparation device and method - Google Patents
Reinforced grinding multi-scale microstructure preparation device and method Download PDFInfo
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- CN115213744B CN115213744B CN202210869826.6A CN202210869826A CN115213744B CN 115213744 B CN115213744 B CN 115213744B CN 202210869826 A CN202210869826 A CN 202210869826A CN 115213744 B CN115213744 B CN 115213744B
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- grinding
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- grating plate
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- 238000000227 grinding Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 23
- 239000002344 surface layer Substances 0.000 claims abstract description 8
- 210000001503 joint Anatomy 0.000 claims abstract description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 239000010431 corundum Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 4
- 239000005069 Extreme pressure additive Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000002357 osmotic agent Substances 0.000 claims description 3
- 239000003002 pH adjusting agent Substances 0.000 claims description 3
- 239000006174 pH buffer Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000003755 preservative agent Substances 0.000 claims description 3
- 230000002335 preservative effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 abstract description 7
- 239000010410 layer Substances 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction 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
- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention relates to the technical field of bearing reinforcement processing, in particular to a device and a method for preparing a reinforced grinding multi-scale microstructure. The reinforced grinding multi-scale microstructure preparation device comprises an ultrasonic reinforced grinder and a grating plate; the grating plate is attached to the surface to be processed of the workpiece, and the surface of the workpiece with the grating plate is in butt joint with the processing cavity of the ultrasonic reinforced grinding machine and is in contact with abrasive in the processing cavity. By arranging the grating plate on the to-be-machined part, a part of the to-be-machined part is covered by the grating plate, and the part of the to-be-machined part is exposed at the through holes of the grating plate. As a result, the abrasive impact forces experienced by the covered and exposed areas of the workpiece are different. The covering area near the surface layer forms a reinforced layer structure with higher hardness, which is different from the matrix, and the surface structure of the exposed area is remolded and forms a pit-shaped texture. The surface hardness is improved by 16.18% compared with that of the matrix, and the ultrasonic enhanced grinding remodelling of the surface structure and the generation of pit-shaped similar textures are realized.
Description
Technical Field
The invention relates to the technical field of bearing reinforcement processing, in particular to a device and a method for preparing a reinforced grinding multi-scale microstructure.
Background
Bearings are used as the necessary rotating load-bearing body for mechanical equipment and are called mechanical joints by the mechanical industry. Failure of the bearing not only causes property loss, but also can lead to a large number of casualties, so that the improvement of the fatigue life of the bearing has great significance. The service environment of the bearing is very bad, and the bearing is subjected to combined action of multiple factors such as high stress, high speed, high temperature and the like, so that the risks of abrasion and contact fatigue failure of the relative movement of the inner ring roller path and the rolling body of the bearing are high. Therefore, it is important to strengthen the inner and outer race tracks of the bearing to improve the fatigue life.
The existing method for solving the premature failure of the rolling bearing and prolonging the service life of the rolling bearing mainly comprises the steps of carrying out surface strengthening on the contact surface by mechanical and chemical means, and improving the physical properties (such as hardness and wear resistance) of the contact surface of a roller way and a roller, wherein the common methods include surface chemical heat treatment, superfinishing of the surface of the roller way and the like; the lubrication condition of the contact surface is improved through structural design, such as surface micro-texture design and the like. Both of the above methods have certain limitations: surface strengthening generally only improves the physical and chemical properties of the raceway surface material, but cannot design the structure of the raceway surface, so that the lubrication condition of the raceway surface is improved; the surface structure design generally adopts a mechanical or laser processing method to directly change the surface structure of the raceway, but the raceway material cannot be reinforced, and meanwhile, the residual tensile stress of the surface layer introduced by mechanical processing can promote the initiation of microcracks of the surface layer, accelerate the peeling of the surface material of the raceway, and cause the wear failure of the raceway of the bearing.
Disclosure of Invention
The first object of the present invention is to provide a preparation device for reinforced grinding multi-scale microstructure, which can solve the problem that the surface reinforcement and the surface structure change cannot be simultaneously realized in the prior art;
a second object of the present invention is to provide a method for manufacturing a reinforced grinding multi-scale microstructure, which uses the reinforced grinding multi-scale microstructure manufacturing apparatus as described above to process an outer ring of a bearing ring.
The invention provides a preparation device of a reinforced grinding multi-scale microstructure, which comprises an ultrasonic reinforced grinding machine and a grating plate;
the grating plate is attached to the surface to be processed of the workpiece, and the surface of the workpiece with the grating plate is in butt joint with the processing cavity of the ultrasonic reinforced grinding machine and is in contact with abrasive in the processing cavity.
Preferably, the ultrasonic strengthening grinder comprises an ultrasonic motor, an ultrasonic tool head and a workpiece clamp;
the ultrasonic tool head is connected with the ultrasonic motor and is arranged in the processing cavity, and the workpiece clamp tool is used for fixing a workpiece to be processed.
Preferably, an abrasive is arranged in the grinding cavity;
the grinding material consists of ceramic balls with the diameter of 1mm, steel balls with the diameter of 0.8mm, grinding powder with the particle size of 120# to 180# and grinding liquid.
The preferable grinding powder is prepared by mixing white corundum and brown corundum according to the proportion of 1:2.
Preferably, the grinding fluid comprises the following components in parts by mass: 18% extreme pressure additive, 4% preservative, 18% osmotic agent, 4% pH adjuster, 13% surfactant, 4% pH buffer, 4% softener, 35% water.
Preferably, tens of square through holes are formed in the grating plate.
Preferably, the square grid plate has a hardness of 69HRC.
The preparation method of the reinforced grinding multi-scale microstructure adopts the preparation device of the reinforced grinding multi-scale microstructure to process the outer ring of the bearing ring;
and processing the outer ring of the bearing ring with the square grating plate through an ultrasonic reinforced grinding machine, wherein a multi-scale structure can be formed on the surface layer of the outer ring of the bearing ring after the processing is finished.
Preferably, the multi-scale structure comprises a two-stage micro-texture; the first-stage micro-texture is formed at the covering part of the grating, and the second-stage micro-texture is formed at the position corresponding to the through hole of the grating.
The beneficial effects are that:
by arranging the grating plate on the to-be-machined part, a part of the to-be-machined part is covered by the grating plate, and the part of the to-be-machined part is exposed at the through holes of the grating plate. As a result, the abrasive impact forces experienced by the covered and exposed areas of the workpiece are different. The covering area near the surface layer forms a reinforced layer structure with higher hardness, which is different from the matrix, and the surface structure of the exposed area is remolded and forms a pit-shaped texture. Experiments prove that the surface hardness is improved by 16.18 percent compared with that of the matrix, and the ultrasonic enhanced grinding processing remodels the surface structure and generates pit-shaped similar textures.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a device for preparing a multi-scale microstructure for enhanced polishing according to an embodiment of the present invention;
FIG. 2 is a schematic view of a grid plate structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of a surface structure of an outer ring of a bearing ring after processing according to an embodiment of the present invention;
FIG. 4 is a schematic view of the surface structure of the outer ring of the bearing ring before and after processing according to an embodiment of the present invention
Reference numerals illustrate:
1: ultrasonic strengthening grinder, 2: grid plate, 3: a bearing ring;
11: processing cavity, 12: abrasive, 13: an ultrasonic tool head.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 and 2, the present embodiment provides a reinforced grinding multi-scale microstructure manufacturing apparatus, which includes an ultrasonic reinforced grinder 1 and a grating plate 2.
The grating plate 2 is attached to the surface to be processed of the workpiece, and the surface of the workpiece to be processed with the grating plate 2 is butted with the processing cavity 11 of the ultrasonic reinforced grinding machine 1 and is contacted with the abrasive 12 in the processing cavity 11.
By providing the grating plate 2 on the work piece, a partial area of the work piece is covered by the grating plate 2, and a partial area is exposed at the through-holes of the grating plate 2. As a result, the abrasive 12 impact forces experienced by the covered and exposed areas of the workpiece are different. The covering area near the surface layer forms a reinforced layer structure with higher hardness, which is different from the matrix, and the surface structure of the exposed area is remolded and forms a pit-shaped texture. Experiments prove that the surface hardness is improved by 16.18 percent compared with that of the matrix, the ultrasonic enhanced grinding processing remodels the surface structure and generates pit-shaped similar textures, and the similar textures can be adjusted and controlled through technological parameters.
The ultrasonic intensified grinder 1 comprises an ultrasonic tool head 13 and a workpiece clamp, wherein the ultrasonic tool head 13 is arranged in a processing cavity 11, and the workpiece clamp is used for fixing a workpiece to be processed.
An abrasive 12 is disposed within the grinding chamber.
The grinding material 12 consists of ceramic balls with the diameter of 1mm, steel balls with the diameter of 0.8mm, grinding powder with the particle diameter of 120# to 180# and grinding liquid.
The grinding powder is prepared by mixing white corundum and brown corundum according to the proportion of 1:2.
The grinding fluid comprises the following components in parts by mass: 18% extreme pressure additive, 4% preservative, 18% osmotic agent, 4% pH adjuster, 13% surfactant, 4% pH buffer, 4% softener, 35% water.
Tens of square through holes are arranged in the square grid plate 2. The square grid plate 2 is a metal piece with a hardness of 69HRC.
In the present embodiment, there is provided a method for manufacturing a reinforced grinding multi-scale microstructure, which processes an outer ring of a bearing ring 3 using the reinforced grinding multi-scale microstructure manufacturing apparatus as described above.
The outer ring of the bearing ring 3 with the square grating plate 2 is processed by the ultrasonic reinforced grinding machine 1, and a multi-scale structure can appear on the surface layer of the outer ring of the bearing ring 3 after the processing is completed.
Specifically, during the machining process, the metal piece with the square grating is fixed on the outer ring of the bearing ring 3, and then the ring with the grating is aligned with the circular machining cavity 11 and sleeved on the fixed workpiece clamp to form a sealed environment. Then the ultrasonic motor is started, so that the ultrasonic reinforced grinding machine 1 processes the outer ring of the bearing ring 3.
Referring to fig. 3, the multi-scale structure includes two-level micro-textures; primary micro-textures (corresponding to the positions on both sides of fig. 3) are formed at the grid covering positions, and secondary micro-textures (corresponding to the middle positions of fig. 3) are formed at the positions corresponding to the grid through holes.
The first-stage micro-texture is formed by high-frequency impact of the abrasive 12 entering between the grating plate 2 and the surface of the workpiece, and dozens of square micro-textures are left on the surface of the workpiece, so that a reinforced layer structure with higher hardness, which is different from a matrix, is formed.
Further, the secondary micro-texture is formed by directly impacting the surface of the workpiece with high frequency through the through holes on the grating by the abrasive 12, so that the surface stress of the workpiece is concentrated, residual compressive stress is generated, nano-scale grain refinement is formed, the surface structure of the outer ring of the bearing ring 3 is remolded, and a pit-shaped texture is formed, and referring to fig. 4.
The outer ring of the bearing ring 3 reinforced by the method can realize the purposes of antifriction, wear resistance, lubrication and drag reduction of the bearing. Playing a more positive role in controlling friction, reducing wear and improving lubrication.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The preparation device of the reinforced grinding multi-scale microstructure is characterized by comprising an ultrasonic reinforced grinding machine and a grating plate;
the surface of the to-be-machined workpiece, which is provided with the grating plate, is in butt joint with the machining cavity of the ultrasonic reinforced grinding machine and is in contact with abrasive in the machining cavity;
forming a two-stage micro-texture on the surface of the workpiece to be processed, wherein a first-stage micro-texture is formed at a grid covering part, and a second-stage micro-texture is formed at a position corresponding to a grid through hole;
the first stage micro texture is formed by high frequency impact of abrasive entering between the grating plate and the surface of the workpiece;
the secondary micro-texture is formed because the abrasive directly impacts the surface of the workpiece at high frequency through the through holes on the grid.
2. The intensive grinding multi-scale microstructure manufacturing apparatus of claim 1, wherein the ultrasonic intensive grinding machine comprises an ultrasonic motor, an ultrasonic tool head, and a workpiece holder;
the ultrasonic tool head is connected with the ultrasonic motor, the ultrasonic tool head is arranged in the processing cavity, and the workpiece clamp is used for fixing a workpiece to be processed.
3. The reinforced grinding multi-scale microstructure preparation device according to claim 1, wherein the grinding material consists of ceramic balls with the diameter of 1mm, steel balls with the diameter of 0.8mm, grinding powder with the particle diameter of 120# to 180# and grinding liquid.
4. The reinforced grinding multi-scale microstructure preparation device according to claim 3, wherein the grinding powder is prepared by mixing white corundum and brown corundum according to a ratio of 1:2.
5. The reinforced grinding multi-scale microstructure preparation device according to claim 3, wherein the grinding liquid comprises the following components in parts by mass: 18% extreme pressure additive, 4% preservative, 18% osmotic agent, 4% pH adjuster, 13% surfactant, 4% pH buffer, 4% softener, 35% water.
6. The apparatus for preparing the reinforced grinding multi-scale microstructure according to claim 1, wherein the grid plate is a square grid plate, and tens of square through holes are formed in the square grid plate.
7. The apparatus for preparing a multi-scale microstructure through intensive grinding of claim 1 or 6, wherein the square grid plate has a hardness of 69HRC.
8. A method for preparing a reinforced grinding multi-scale microstructure, which is characterized in that the method comprises the steps of processing an outer ring of a bearing ring by adopting the reinforced grinding multi-scale microstructure preparation device according to claims 1-7;
and processing the outer ring of the bearing ring with the square grating plate through an ultrasonic reinforced grinding machine, wherein a multi-scale structure can be formed on the surface layer of the outer ring of the bearing ring after the processing is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210869826.6A CN115213744B (en) | 2022-07-21 | 2022-07-21 | Reinforced grinding multi-scale microstructure preparation device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210869826.6A CN115213744B (en) | 2022-07-21 | 2022-07-21 | Reinforced grinding multi-scale microstructure preparation device and method |
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| Publication Number | Publication Date |
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| CN115213744A CN115213744A (en) | 2022-10-21 |
| CN115213744B true CN115213744B (en) | 2023-11-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06339841A (en) * | 1993-05-31 | 1994-12-13 | Souzou Kagaku:Kk | Ultrasonic masking machining method |
| CN103042375A (en) * | 2013-01-08 | 2013-04-17 | 中国人民解放军装甲兵工程学院 | Machining method for manufacturing regular microtexture on surface of metal matrix or coating |
| CN105234824A (en) * | 2015-10-26 | 2016-01-13 | 南京航空航天大学 | Device and method for processing surface texture through micro-abrasive multiphase jetting |
| CN113681445A (en) * | 2021-07-21 | 2021-11-23 | 广州大学 | Efficient ultrasonic wave reinforced grinding equipment and method |
-
2022
- 2022-07-21 CN CN202210869826.6A patent/CN115213744B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06339841A (en) * | 1993-05-31 | 1994-12-13 | Souzou Kagaku:Kk | Ultrasonic masking machining method |
| CN103042375A (en) * | 2013-01-08 | 2013-04-17 | 中国人民解放军装甲兵工程学院 | Machining method for manufacturing regular microtexture on surface of metal matrix or coating |
| CN105234824A (en) * | 2015-10-26 | 2016-01-13 | 南京航空航天大学 | Device and method for processing surface texture through micro-abrasive multiphase jetting |
| CN113681445A (en) * | 2021-07-21 | 2021-11-23 | 广州大学 | Efficient ultrasonic wave reinforced grinding equipment and method |
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| CN115213744A (en) | 2022-10-21 |
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