CN114001103B - Dual steel sheet of wet clutch and processing method thereof - Google Patents
Dual steel sheet of wet clutch and processing method thereof Download PDFInfo
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- CN114001103B CN114001103B CN202111214168.9A CN202111214168A CN114001103B CN 114001103 B CN114001103 B CN 114001103B CN 202111214168 A CN202111214168 A CN 202111214168A CN 114001103 B CN114001103 B CN 114001103B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 124
- 239000010959 steel Substances 0.000 title claims abstract description 124
- 230000009977 dual effect Effects 0.000 title claims abstract description 116
- 238000003672 processing method Methods 0.000 title abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 43
- 238000000576 coating method Methods 0.000 claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 230000003068 static effect Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 8
- 230000005764 inhibitory process Effects 0.000 claims description 7
- 230000003746 surface roughness Effects 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 5
- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000007751 thermal spraying Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 5
- 238000010168 coupling process Methods 0.000 claims 5
- 238000005859 coupling reaction Methods 0.000 claims 5
- 230000002787 reinforcement Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 13
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000005728 strengthening Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 abstract 1
- 230000001050 lubricating effect Effects 0.000 description 7
- 238000000926 separation method Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/60—Clutching elements
- F16D13/64—Clutch-plates; Clutch-lamellae
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- 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
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/60—Clutching elements
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/74—Features relating to lubrication
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
The invention discloses a dual steel sheet of a wet clutch and a processing method thereof, comprising a dual steel sheet body; concave-convex composite structures are distributed on the surfaces of the working surfaces on the two sides of the dual steel sheet body, and the concave-convex composite structures are uniformly distributed in a radial divergent mode along the radial direction by taking the circle center of the surface of the dual steel sheet body as the center; the concave-convex composite structure comprises round concave pit parts and round convex parts, and the round concave pit parts and the round convex parts are alternately distributed along the radial direction; the surfaces of the working surfaces on the two sides of the dual steel sheet body are uniformly coated with a wear-resistant coating; the processing method comprises pretreatment, surface convex texture, surface pit texture and compound treatment; the beneficial effects are that: according to the invention, the high-strength stable static friction torque is transmitted according to the wet clutch, the functional requirements of strengthening the surface wear resistance, improving the creeping phenomenon, the slipping phenomenon and the like generated during the conversion of the dynamic friction torque and the static friction torque are considered, and the high-efficiency stable torque transmission during the engagement of the wet clutch is ensured during the surface treatment of the dual steel sheets.
Description
Technical Field
The invention relates to a clutch component, in particular to a dual steel sheet of a wet clutch, and belongs to the technical field of automobile engineering.
Background
Wet clutches are widely used as important components of transmission gear shifting systems in the fields of automobiles, ships, engineering machinery, and the like. Particularly, with the rapid development of hybrid electric vehicles and pure electric vehicles, higher challenges are presented to the rotating speed and torque of a power transmission system, and the wet clutch is required to avoid creeping and slipping phenomena generated during the conversion of dynamic and static friction torque when being engaged, so that the wear resistance of the surface is enhanced, and the high-strength stable static friction torque is rapidly transmitted.
How to effectively ensure the stability of clutch power transmission, improve the slipping and creeping phenomena of friction plates and dual steel plates, and ensure the high efficiency and stability of the power transmission of a speed change system has become the focus of increasing attention in the industry. On one hand, the friction plate has abrupt change of dynamic and static friction force distance in the process of converting from motion to static, and is easy to creep and slip and the heat load is increased; on the other hand, the increase of the rotating speed and the torque accelerates the friction and the abrasion of the wet clutch, and the service life is reduced. Therefore, the wet clutch has important significance in meeting the requirements of high strength and stable static friction torque transmission of the wet clutch, strengthening the surface wear resistance and improving the creeping phenomenon and the slipping phenomenon generated during the conversion of the dynamic friction torque and the static friction torque.
For the smooth performance of lubrication friction and torque transmission of a wet clutch, research at home and abroad mainly focuses on optimization modes such as special materials, roughness and the like on the surfaces of dual steel sheets. However, the single coating technology cannot meet the requirements of high efficiency and stability of power transmission of the wet clutch, and larger surface roughness easily causes the aggravation of friction and abrasion of friction pairs, aggravates the heat load caused by slipping and crawling, and reduces the service life. Therefore, the single prior art cannot improve the slipping and creeping phenomena of the friction plate and the dual steel plate and the efficient and stable power transmission of the speed change system, and the key technology for solving the problem is still lacking at present.
Disclosure of Invention
The invention aims to: aiming at the problems in the prior art, the invention provides a dual steel sheet of a wet clutch and a processing method thereof, which can improve the creeping and slipping phenomena caused by abrupt change of dynamic and static friction moments in the process of engagement of the wet clutch and can strengthen the surface wear resistance and the high-efficiency and stable power transmission performance of the wet clutch after engagement. In the process of jointing the dual steel sheet and the friction plate of the wet clutch, on one hand, the circular protruding part in the surface texture and the coating composite structure is utilized to increase the surface roughness of the dual steel sheet and enable the circular protruding part to be embedded into the friction plate, so that the nail hole is reinforced, the anchoring is enhanced to rapidly increase the static friction force of jointing between the dual steel sheet and the friction plate, the slipping phenomenon caused by the abrupt change of the dynamic friction moment and the static friction moment in the jointing process is improved, and the creeping inhibition effect is achieved; on the other hand, the surface coating technology is utilized to strengthen the wear resistance of the double-side working surfaces of the dual steel sheet, and the service life is prolonged. When the dual steel sheet is separated, the adhesion of the dual steel sheet and the friction plate caused by the high temperature generated by friction is avoided by utilizing the surface texture and the circular protruding part in the coating composite structure; the hydrodynamic pressure effect generated by abrupt change of the cross-sectional area of the round pit part is utilized to accelerate the separation process, and meanwhile, the micro pit structure can store lubricating medium and abrasive dust generated in the sliding process to improve the lubricating effect.
The technical scheme is as follows: a dual steel sheet of a wet clutch comprises a dual steel sheet body; concave-convex composite structures are distributed on the surfaces of the working surfaces on the two sides of the dual steel sheet body, and the concave-convex composite structures are uniformly distributed in a radial divergent mode along the radial direction by taking the circle center of the surface of the dual steel sheet body as the center; the concave-convex composite structure comprises round concave pit parts and round convex parts, and the round concave pit parts and the round convex parts are alternately distributed along the radial direction; in order to strengthen the wear resistance of the double-side working surfaces of the dual steel sheet and prolong the service life, the surfaces of the double-side working surfaces of the dual steel sheet body are uniformly coated with a wear-resistant coating.
According to the invention, the high-strength stable static friction moment is transmitted according to the wet clutch, the functional requirements of strengthening the surface wear resistance and improving the creeping and slipping phenomena and the like generated during the conversion of the dynamic and static friction moments are considered, a surface texture and coating composite structure is arranged on the surface of a dual steel sheet, and wear-resistant coatings are uniformly distributed, on one hand, the surface texture and coating composite structure is utilized, the static friction force of the joint between the surface texture and the coating composite structure is rapidly increased when the wet clutch is jointed, the slipping phenomena caused by the abrupt change of the dynamic and static friction moments in the joint process are improved, the creeping inhibition effect is achieved, the adhesion between the dual steel sheet and the friction sheet is avoided during the separation, and meanwhile, the fluid dynamic pressure effect is utilized to accelerate the separation process; on the other hand, the surface coating technology is utilized to strengthen the wear resistance of the double-side working surfaces of the dual steel sheet, and the service life is prolonged.
Preferably, in order to accelerate the disengagement process of the wet clutch and store the abrasive dust generated in the sliding friction process to delay surface abrasion, the profile of the intersection of the circular pit part and the surface of the dual steel sheet body is projected in a circular range with the diameter of 50-500 mu m, and the depth from the bottom of the circular pit part to the surface of the dual steel sheet body is 5-50 mu m.
Preferably, in order to achieve better engagement force when the wet clutch is engaged and simultaneously avoid adhesion of the dual steel sheets and the friction sheets, the profile of the intersection of the circular protruding part and the surface of the dual steel sheet body is projected in a circular range with the diameter of 50-500 mu m, and the height from the top of the circular protruding part to the surface of the dual steel sheet body is 2-20 mu m.
Preferably, in order to achieve better effect, the included angles between the adjacent rays formed by the concave-convex composite structure are equal and are 2 degrees to 20 degrees.
Preferably, in order to reduce the processing difficulty, the adjacent radial distances between the circular concave pit part and the circular convex part on the same radial line are equal, the distance range is 100-1000 μm, and the circular concave pit part and the circular convex part are alternately distributed on the two side working surfaces of the dual steel sheet body of the wet clutch. The heights from the top of the round protruding part of the concave-convex composite structure to the surface of the dual steel sheet body are the same.
In order to meet the difference of friction torque and linear speed requirements at different positions of the wet clutch, the adjacent radial distance between the circular concave pit part and the circular convex part on the same radial line is gradually increased from inside to outside, and the increasing proportion is 1/4-1/2 times of the previous distance. At high rotation speed, the outer line speed of the dual steel sheet is higher, the shearing moment of the lubricating oil film is increased, and the flow resistance of the circular protruding part to the lubricating medium at high rotation speed can be effectively reduced through the surface texture design with gradient change of width so as to reduce friction loss.
In order to meet the difference of friction torque and linear speed requirements at different positions of the wet clutch, the height from the top of the circular protruding part of the concave-convex composite structure to the surface of the dual steel sheet body is gradually increased from inside to outside in an equal gradient manner along the radial direction. The height change gradient value from the top of the circular protruding part of the concave-convex composite structure to the surface of the dual steel sheet body is the maximum difference value of the height divided by the gradient. On the one hand, the friction moment distribution on the working surface of the dual steel sheet of the wet clutch at high rotation speed is uneven, the moment on the radial outer side is obviously higher, and the circular protruding part with the height gradually increasing from the inner side to the outer side in an equal gradient is arranged, so that the friction moment distribution on the surface of the dual steel sheet can be effectively improved, and the stable performance of the wet clutch in the joint state can be enhanced and controlled. On the other hand, when the clutch works for a long time, the circular protruding part with the height gradient change can adapt to the surface abrasion of the dual steel disc, and the ladder-shaped support is formed from the inner side to the outer side along the radial direction, so that the anchoring force is continuously provided, and the friction moment is enhanced.
A processing method of a dual steel sheet of a wet clutch comprises the following steps:
step one, preprocessing, namely mechanically refining the working surfaces on two sides of the dual steel sheet to reduce the surface roughness to less than Ra0.5mu m;
step two, carrying out surface bulge texture, and carrying out laser texturing processing on a round bulge by using an SPI fiber laser, wherein the power of the SPI fiber laser is 30-50W, and the pulse width is 1500 mu s;
step three, surface pit texture, namely processing round pit parts on the working surfaces of the two sides of the dual steel sheet by adopting nanosecond focusing laser beams, wherein the laser single pulse energy is 0.1-0.2mJ;
and step four, compounding treatment, namely uniformly spraying a wear-resistant coating (3) on the working surface of the dual steel sheet by adopting a thermal spraying technology, wherein the wear-resistant coating is a diamond-like coating or other wear-resistant coatings.
The beneficial effects are that: according to the invention, the high-strength stable static friction torque is transmitted according to the wet clutch, the functional requirements of strengthening the surface wear resistance and improving the creeping and slipping phenomena and the like generated during the conversion of the dynamic and static friction torque are considered, the surface texture and coating composite structure is arranged on the surface of the dual steel sheet, and the wear-resistant coating is uniformly distributed, so that the creeping inhibition is realized, and the high-efficiency and stable torque transmission during the engagement of the wet clutch is ensured.
When the wet clutch is connected, on one hand, the surface roughness of the dual steel sheet is increased by utilizing the circular protruding part in the surface texture and coating composite structure, the circular protruding part is embedded into the friction plate, the nail hole is reinforced, the static friction force of the connection between the two is rapidly increased by anchoring and reinforcing, the slipping phenomenon caused by the abrupt change of the dynamic friction moment and the static friction moment in the connection process is improved, and the creeping inhibition effect is achieved; on the other hand, the surface coating technology is utilized to strengthen the wear resistance of the double-side working surfaces of the dual steel sheet, and the service life is prolonged. When the dual steel sheet is separated, the adhesion of the dual steel sheet and the friction plate caused by the high temperature generated by friction is avoided by utilizing the surface texture and the circular protruding part in the coating composite structure; the hydrodynamic pressure effect generated by abrupt change of the cross-sectional area of the circular pit part is utilized to accelerate the separation process, and meanwhile, friction scraps and lubricating media can be stored in the circular pit part, so that the lubricating effect is improved. Therefore, the invention can more effectively inhibit the creeping and slipping phenomena when the wet clutch is engaged, and strengthen the surface wear resistance after the engagement, thereby achieving the effect of high efficiency and stability of power transmission.
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 required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a concave-convex composite structure of the invention uniformly distributed on the surface of a dual steel sheet;
FIG. 2 is an enlarged view of a portion of the surface of a dual steel sheet of the present invention;
FIG. 3 is an enlarged partial cross-sectional view of a first embodiment of the present invention;
FIG. 4 is an enlarged partial cross-sectional view of a second embodiment of the present invention;
fig. 5 is an enlarged partial sectional view of a third embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only 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 "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements 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.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
As shown in fig. 1, a wet clutch dual steel sheet includes a dual steel sheet body 1; the surfaces of the two side working surfaces of the dual steel sheet body 1 are distributed with concave-convex composite structures 2, and the concave-convex composite structures 2 are uniformly distributed in a radial divergent shape by taking the circle center of the surface of the dual steel sheet body 1 as the center; the concave-convex composite structure 2 comprises round concave pit parts 21 and round convex parts 22, wherein the round concave pit parts 21 and the round convex parts 22 are alternately distributed along the radial direction; the surfaces of the double-side working surfaces of the dual steel sheet body 1 are uniformly coated with the wear-resistant coating 3.
As shown in fig. 2, the contour of the circular concave portion 21 intersecting the surface of the dual steel sheet body 1 is projected as a circle with a diameter D1, and the contour of the circular convex portion 22 intersecting the surface of the dual steel sheet body 1 is projected as a circle with a diameter D2; the distance between the two radially adjacent circular concave pit parts 21 and the circular convex part 22 is L1, and the distance between the two circumferentially adjacent circular concave pit parts 21 and the circular convex part 22 is L2;
the profile of the intersection of the circular pit part 21 and the surface of the dual steel sheet body 1 is projected in a circular range with the diameter of 50-500 mu m, and the depth from the bottom of the circular pit part 21 to the surface of the dual steel sheet body 1 is 5-50 mu m.
The contour of the intersection of the circular protruding part 22 and the surface of the dual steel sheet body 1 is projected in the circular range with the diameter of 50-500 mu m, and the height from the top of the circular protruding part 22 to the surface of the dual steel sheet body 1 is 2-20 mu m.
The included angle between the adjacent rays formed by the surface texture and the coating composite structure 2 is equal and is 2-20 degrees.
Example 1
As shown in fig. 3, the heights H1 from the tops of the circular concave portions 21 of the surface texture and coating composite structure 2 to the surface of the dual steel sheet body 1 are the same, the heights H2 from the tops of the circular convex portions 22 of the surface texture and coating composite structure 2 to the surface of the dual steel sheet body 1 are the same, the radial distances L1 between the two adjacent circular concave portions 21 and the circular convex portions 22 are the same, and the adjacent circular concave portions 21 and the circular convex portions 22 are alternately distributed on the two-side working surfaces of the dual steel sheet body 1 of the wet clutch; in the first embodiment, the profile projection diameter D1 of the circular concave portion 21 intersecting the surface of the dual steel sheet body 1 is 100 μm, and the profile projection diameter D2 of the circular convex portion 22 intersecting the surface of the dual steel sheet body 1 is 100 μm; the height H1 from the bottom of the circular pit part 21 to the surface of the dual steel sheet body 1 is 5 μm; the height H2 from the top of the circular boss 22 to the surface of the dual steel sheet body 1 is 5 μm; the radial distance L1 between two adjacent circular concave pit portions 21 and the circular convex portion 22 is 300 μm.
Example two
As shown in fig. 4, the height H1 from the top of the circular concave pit portion 21 of the surface texture and coating composite structure 2 to the surface of the dual steel sheet body 1 is the same, the height H2 from the top of the circular convex portion 22 of the surface texture and coating composite structure 2 to the surface of the dual steel sheet body 1 is the same, the radial distance between the two adjacent circular concave pit portions and the circular convex portion is gradually increased from inside to outside, and the distance L1 between the two adjacent circular concave pit portions and the circular convex portion is 1/4-1/2 times of the adjacent circumferential distance L2. In the second embodiment, the diameter D of the profile projection of the surface texture and coating composite structure 2 intersecting with the surface of the dual steel sheet body 1 is 100 μm; the height H1 from the bottom of the circular pit part 21 to the surface of the dual steel sheet body 1 is 5 μm; the height H2 from the top of the circular boss 22 to the surface of the dual steel sheet body 1 is 5 μm; the distance L1 between two adjacent radial circular concave pit parts and the circular convex part is 1/2 times of the adjacent circumferential distance L2.
Example III
As shown in fig. 5, the height H1 from the top of the circular concave portion 21 of the surface texture and coating composite structure 2 to the surface of the dual steel sheet body 1 is the same, the height H2 from the top of the circular convex portion 22 of the surface texture and coating composite structure 2 to the surface of the dual steel sheet body 1 gradually increases in an equal gradient from inside to outside along the radial direction, and the height change gradient value from the top of the circular convex portion 22 to the surface of the dual steel sheet body 1 is the maximum difference of the heights divided by the gradient. In the third embodiment, the height H2 from the top of the circular protrusion 22 of the surface texture and coating composite structure 2 to the surface of the dual steel sheet body 1 is at most 20 μm, and at most 2 μm.
The method for processing the dual steel sheet of the wet clutch comprises the following specific steps:
step 1: preprocessing, namely machining the surface of the dual steel sheet by adopting mechanical fine grinding; in the step 1, the dual-side working surfaces of the dual steel sheet body are polished by sand paper to reduce the roughness of the dual steel sheet body to less than Ra0.5mu m.
Step 2: the surface is textured, and an SPI fiber laser is utilized to carry out laser texturing processing on the round protruding part; in the step 2, the SPI fiber laser is processed from the inner side to the outer side along the radial direction of the working surface of the dual steel sheet body, after a circle of circular protruding parts are processed at equal angles, the laser is moved for a certain distance along the radial direction to the outer side of the dual steel sheet to continue to be processed at equal angles until the whole wet clutch surface is processed; the processing power of the SPI fiber laser is 30W, and the pulse width is 1500 mu s;
step 3: the surface pit texture is formed by processing circular pit parts on the working surfaces of the two sides of the dual steel sheet by adopting focused laser beams; in the step 3, a focused laser beam is adopted to process the working surface of the dual steel sheet body from the inner side to the outer side in the radial direction, after a circle of circular pit parts are processed at equal angles, the laser beam moves for a certain distance from the radial direction to the outer side of the dual steel sheet to continue to process at equal angles until the whole wet clutch surface is processed; the laser single pulse energy is 0.1-0.2mJ.
Step 4: and (3) carrying out composite treatment, and uniformly spraying a DLC (diamond-like carbon) wear-resistant coating on the working surface of the dual steel sheet by adopting a thermal spraying technology.
According to the wet clutch dual steel sheet, the high-strength stable static friction moment is transmitted according to the wet clutch, the surface wear resistance is enhanced, the functional requirements of creeping, slipping and the like generated during conversion of dynamic and static friction moments are improved, the surface texture and coating composite structure is arranged on the surface of the dual steel sheet, the wear-resistant coating is uniformly distributed, the creeping inhibition is realized, and the high-efficiency and stable torque transmission during the engagement of the wet clutch is ensured. When the wet clutch is connected, on one hand, the surface roughness of the dual steel sheet is increased by utilizing the circular protruding part in the surface texture and coating composite structure, the circular protruding part is embedded into the friction plate, the nail hole is reinforced, the static friction force of the connection between the two is rapidly increased by anchoring and reinforcing, the slipping phenomenon caused by the abrupt change of the dynamic friction moment and the static friction moment in the connection process is improved, and the creeping inhibition effect is achieved; on the other hand, the surface coating technology is utilized to strengthen the wear resistance of the double-side working surfaces of the dual steel sheet, and the service life is prolonged. When the dual steel sheet is separated, the adhesion of the dual steel sheet and the friction plate caused by the high temperature generated by friction is avoided by utilizing the surface texture and the circular protruding part in the coating composite structure; the hydrodynamic pressure effect generated by abrupt change of the cross-sectional area of the circular pit part is utilized to accelerate the separation process, and meanwhile, the pit structure can store lubricating medium and abrasive dust generated in the sliding process, so that the lubricating effect is improved. Furthermore, friction torque on the working surface of the dual steel sheet of the wet clutch is unevenly distributed at a high rotating speed, the torque on the outer side in the radial direction is obviously higher, and the friction torque distribution on the surface of the dual steel sheet can be effectively improved through the design of surface textures and coating composite structures of round protruding parts with different heights or different intervals, so that the stable working performance of the wet clutch in the joint state is enhanced and controlled.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A dual steel sheet of a wet clutch comprises a dual steel sheet body (1); the method is characterized in that: concave-convex composite structures (2) are distributed on the surfaces of the two side working surfaces of the dual steel sheet body (1), and the concave-convex composite structures (2) are uniformly distributed in a radial divergent mode by taking the circle center of the surface of the dual steel sheet body (1) as the center; the concave-convex composite structure (2) comprises round pit parts (21) and round protruding parts (22), wherein the round pit parts (21) and the round protruding parts (22) are alternately distributed along the radial direction; the surfaces of the double-side working surfaces of the dual steel sheet body (1) are uniformly coated with a wear-resistant coating (3); the round bulge part (22) is formed by laser texturing processing of the surfaces of the two side working surfaces of the dual steel sheet body (1) by using an SPI fiber laser; when the wet clutch is connected, the circular protruding part (22) is utilized to increase the surface roughness of the dual steel sheet body (1) and enable the circular protruding part (22) to be embedded into the friction plate, the nail hole is reinforced, the static friction force of the connection between the circular protruding part and the friction plate is rapidly increased by anchoring reinforcement, the slipping phenomenon caused by abrupt change of dynamic and static friction moment in the connection process is improved, and the creeping inhibition effect is achieved.
2. The wet clutch coupling steel sheet of claim 1, wherein: the profile of the intersection of the circular pit part (21) and the surface of the dual steel sheet body (1) is projected in a circular range with the diameter of 50-500 mu m, and the depth from the bottom of the circular pit part (21) to the surface of the dual steel sheet body (1) is 5-50 mu m.
3. The wet clutch coupling steel sheet of claim 1, wherein: the contour of the intersection of the circular protruding part (22) and the surface of the dual steel sheet body (1) is projected in the circular range with the diameter of 50-500 mu m, and the height from the top of the circular protruding part (22) to the surface of the dual steel sheet body (1) is 2-20 mu m.
4. The wet clutch coupling steel sheet of claim 1, wherein: the included angles between adjacent rays formed by the concave-convex composite structure (2) are equal and are 2-20 degrees.
5. The wet clutch coupling steel sheet of claim 2, wherein: the adjacent radial intervals of the round concave pit parts (21) and the round convex parts (22) on the same ray are equal, the interval range is 100-1000 mu m, and the round concave pit parts and the round convex parts are alternately distributed on the two-side working surfaces of the dual steel sheet body (1) of the wet clutch.
6. The wet clutch coupling steel sheet of claim 2, wherein: the adjacent radial distance between the circular concave pit part (21) and the circular convex part (22) on the same radial line is gradually increased from the inner side to the outer side, and the increasing proportion is 1/4-1/2 times of the previous distance.
7. A wet clutch partner steel sheet as claimed in claim 3 wherein: the heights from the tops of the round protruding parts (22) of the concave-convex composite structure (2) to the surface of the dual steel sheet body (1) are the same.
8. A wet clutch partner steel sheet as claimed in claim 3 wherein: the height from the top of the circular protruding part (22) of the concave-convex composite structure (2) to the surface of the dual steel sheet body (1) gradually increases from inside to outside in an equal gradient along the radial direction.
9. The wet clutch partner steel sheet of claim 8, wherein: the height change gradient value from the top of the circular protruding part (22) of the concave-convex composite structure (2) to the surface of the dual steel sheet body (1) is the maximum difference value of the height divided by the gradient.
10. The method of machining a dual steel plate of a wet clutch according to claim 9, comprising the steps of:
step one, preprocessing, namely mechanically refining the surfaces of the working surfaces on the two sides of the dual steel sheet to reduce the surface roughness to less than Ra0.5mu m;
step two, carrying out surface bulge texture, and carrying out laser texturing processing on the round bulge (22) by using an SPI fiber laser, wherein the power of the SPI fiber laser is 30-50W, and the pulse width is 1500 mu s;
step three, surface pit texture, namely processing a circular pit part (21) on the working surfaces of the two sides of the dual steel sheet by adopting nanosecond focused laser beams, wherein the laser single pulse energy is 0.1-0.2mJ;
and step four, compounding treatment, namely uniformly spraying a wear-resistant coating (3) on the surfaces of the two side working surfaces of the dual steel sheet by adopting a thermal spraying technology, wherein the wear-resistant coating is a diamond-like coating.
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| CN202111214168.9A CN114001103B (en) | 2021-10-19 | 2021-10-19 | Dual steel sheet of wet clutch and processing method thereof |
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| CN202111214168.9A CN114001103B (en) | 2021-10-19 | 2021-10-19 | Dual steel sheet of wet clutch and processing method thereof |
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| CN114001103A (en) | 2022-02-01 |
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