CN208138463U - A kind of piston pin - Google Patents
A kind of piston pin Download PDFInfo
- Publication number
- CN208138463U CN208138463U CN201820491456.6U CN201820491456U CN208138463U CN 208138463 U CN208138463 U CN 208138463U CN 201820491456 U CN201820491456 U CN 201820491456U CN 208138463 U CN208138463 U CN 208138463U
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- Prior art keywords
- piston pin
- sliding
- texture
- extrusion
- fine motion
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model provides a kind of piston pin and preparation method thereof, the piston pin is divided into fine motion friction zone and sliding friction area, the fine motion friction zone is located at the both ends outer round surface of the piston pin, the sliding friction area is located between two fine motion friction zones, the piston pin outer round surface is equipped with cloth oil texture, the fine motion friction zone sets anti-extrusion texture, and the sliding friction area sets sliding antifriction texture.The cloth oil texture is the spiral micro groove circumferentially uniformly distributed along piston pin.The anti-extrusion texture is the anti-extrusion dimple chamber for being evenly arranged on the fine motion friction zone, the sliding antifriction texture is the sliding antifriction dimple chamber for being evenly arranged on the sliding friction area, and the anti-extrusion dimple chamber and the shape for sliding antifriction dimple chamber are that hemispherical is parabola shaped or cylindrical.Lubricating oil is pumped to entire piston pin surface by the utility model, significantly improves piston pin lubricating condition, can effectively promote mating area bearing capacity.
Description
Technical field
The utility model relates to technical field of internal combustion engines or lubricating utensil field, in particular to a kind of piston pin.
Background technique
Piston pin is one of the core component that most important, stress condition is most complicated in internal combustion engine machine, in large diesel engine
Piston pin it is key especially prominent, quality good or not directly influences the reliability of internal combustion engine.Due to lubricating insufficient cause
Friction condition is severe and abrasion aggravation is caused surface abrasion or to kill be one of main failure forms of piston pin.
Chinese patent CN201710427459.3 discloses a kind of piston pin hole Ultrasonic machining technique and device, makes piston
Pin bore surface roughness improves a grade on the basis of the original, effectively reduces the roughness value of pin hole inner headed face.But
Piston pin bears huge asymmetric alternating load and certain shock loading, long term high temperature and stress at relatively high temperatures
Lead to piston pin volume change, make space change between piston pin and piston pin hole, lubricating condition is deteriorated；Smooth surface is unfavorable simultaneously
Piston pin surface is adhered in lubricant medium, it is difficult to be formed lubricant medium oil film, is unfavorable for piston pin and connecting rod small end hole bushing
Between opposite sliding, be bound to unstable wear, influences engine performance.Therefore surface roughness is reduced merely and is run to piston pin is promoted
Greasy property, the effect for reducing abrasion are limited.
Chinese patent CN201710561680.8 discloses a kind of piston with piston pin lubrication system, in pin hole
The first oil duct is opened up on wall, is provided with oil ring groove on the side wall of ontology, and oil ring groove is recessed oil ring groove to the axis direction of ontology
Lower plane on offer the second oil duct, the second oil duct is connected to the first oil duct so that oil ring groove scraped from cylinder holes oil liquid into
Enter the second oil duct, and pin hole is arrived at by the first oil duct, the lubrication friction between piston pin and pin hole can be improved to a certain degree
Energy.But lubricating oil is only locally lubricated piston pin, it is difficult to play the effect of entire piston pin face cloth oil, and the program is very big
The complicated piston manufacturing process in ground, improves manufacturing cost, furthermore the structure of internal multiple oil ducts increases later period quality inspection, inspection
It repairs, the workloads such as malfunction elimination.
Summary of the invention
In response to the deficiencies in the existing technology, the utility model provides a kind of piston pin, and lubricating oil is pumped to entirely
Piston pin surface significantly improves piston pin lubricating condition, can effectively promote mating area bearing capacity.
The utility model is to realize above-mentioned technical purpose by following technological means.
A kind of piston pin, the piston pin are divided into fine motion friction zone and sliding friction area, and the fine motion friction zone is located at institute
The both ends outer round surface of piston pin is stated, the sliding friction area is located between two fine motion friction zones, outside the piston pin
Circular surfaces are equipped with cloth oil texture, and the fine motion friction zone sets anti-extrusion texture, and the sliding friction area sets sliding antifriction texture.
Further, the cloth oil texture is the spiral micro groove circumferentially uniformly distributed along piston pin.
Further, the spiral dimple slot number N is 2~5；The screw pitch L of the spiral micro groove15=0.2L~L, wherein
L is piston pin length；Spiral dimple groove width B15It is 15~100 μm；Spiral micro groove depth H15It is 1~20 μm.
Further, the anti-extrusion texture is the anti-extrusion dimple chamber for being evenly arranged on the fine motion friction zone, and the sliding subtracts
Texture of rubbing is the sliding antifriction dimple chamber for being evenly arranged on the sliding friction area, the anti-extrusion dimple chamber and sliding antifriction dimple chamber
Shape be that hemispherical is parabola shaped or cylindrical.
Further, anti-extrusion dimple chamber section maximum dimension D25It is 20~300 μm；The anti-extrusion dimple chamber depth
H25It is 5~30 μm；The axial length of the fine motion friction zone is L20, axis of the anti-extrusion texture in the fine motion friction zone
It is L to length2, and L2=(0.5~1) L20。
Further, the anti-extrusion dimple chamber rectangular array is described in the fine motion friction zone It is describedWherein, a25It is rectangular array in the inclined of circumferencial direction
Away from b25It is rectangular array in axial offset distance, e25For the column offset distance of the anti-extrusion dimple chamber circumferencial direction of adjacent two column.
Further, sliding antifriction dimple chamber section maximum dimension D35It is 20~300 μm；The sliding antifriction dimple chamber
Depth H25It is 1~20 μm；The axial length in the sliding friction area is L30, the sliding antifriction texture is in the sliding friction
The axial length in area is L3, and L3=(0.5~1) L30。
Further, the sliding antifriction dimple chamber rectangular array is described in the sliding friction area It is described Wherein, a35It is rectangular array in circumferencial direction
Offset distance, b35It is rectangular array in axial offset distance, e35For the column offset distance of the sliding antifriction dimple chamber circumferencial direction of adjacent two column.
A kind of production method of piston pin, includes the following steps：Machining piston pin；Laser machine cloth oil texture；Laser adds
The anti-extrusion texture of work and sliding antifriction texture.
Further, the roughness range that machining piston pin rear surface reaches is：Ra≤0.8 μm, Rz≤3.2 μm, Rpk≤
0.15 μm, Rvk≤0.4 μm, circularity and cylindricity≤0.01mm；
Specific laser processing parameter in the laser processing cloth oil texture：Optical maser wavelength 532nm or 1064nm, defocusing amount [-
1.2mm, 1.2mm], pulse width [50ns, 500ns], pulse frequency [1Hz, 10KHz], laser energy density [106W/cm2,
108W/cm2], pulse laser beam overlap ratio [40%, 90%], auxiliary gas is nitrogen or pressure-air or inert gas, assists gas
Body air blowing angle and processing stand normal are at 0-60 °；
The anti-extrusion texture of laser processing and specific laser processing parameter in sliding antifriction texture：Optical maser wavelength 532nm
Or 1064nm, defocusing amount [- 1.2mm, 1.2mm], pulse width [50ns, 500ns], pulse frequency [1Hz, 10KHz], laser energy
Metric density [106W/cm2, 108W/cm2], auxiliary gas is nitrogen or pressure-air or inert gas, assists gas air blowing angle
With processing stand normal at 0-60 °.
The beneficial effects of the utility model are：
1. piston pin described in the utility model, the capillary of the cloth oil texture by being distributed in entire piston pin outer round surface
Effect, is pumped to entire piston pin surface for lubricating oil, significantly improves piston pin lubricating condition.
2. piston pin described in the utility model is knitted by being distributed in the anti-extrusion of piston pin and piston hole matching surface
Structure, the feature with large area occupation rate and big aspect ratio, easily forms anti-extrusion oil film, can effectively promote mating area carrying
Ability.
3. piston pin described in the utility model, the sliding for being arranged in piston pin and connecting rod small end hole bushing matching surface subtracts
It rubs texture, lubricating oil film can be formed in matching surface, improve lubrication state, have both the efficiency for collecting wear particle, reduce mill
Damage.
4. piston pin described in the utility model passes through cloth oil texture, anti-extrusion texture, the coupling work for sliding antifriction texture
With integration gain efficiency is formed, it is effectively improved piston pin operation conditions, lifting system service life and stability.
5. the production method of piston pin described in the utility model, by laser ablation act on piston pin surface formed it is sharp
Photo-hardening layer eliminates sequent surface quenching process, energy conservation and environmental protection.
Detailed description of the invention
Fig. 1 is piston pin perspective view described in the utility model.
Fig. 2 is piston pin outwardly deploying rear screw micro groove distribution map described in the utility model.
Fig. 3 is the cross-sectional view of spiral micro groove described in the utility model.
Fig. 4 is fine motion friction-sliding friction block plan after piston pin outwardly deploying described in the utility model.
Fig. 5 is anti-extrusion dimple chamber distribution map described in the utility model.
Fig. 6 is anti-extrusion dimple chamber sectional view described in the utility model.
Fig. 7 is sliding antifriction dimple chamber distribution map described in the utility model.
Fig. 8 is sliding friction dimple chamber sectional view described in the utility model.
In figure：
15- spiral micro groove；20- fine motion friction zone；The anti-extrusion dimple chamber of 25-；30- sliding friction area；35- slides antifriction
Dimple chamber；
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further described the utility model, but the guarantor of the utility model
Shield range is not limited to this.
As Figure 1-Figure 4, piston pin described in the utility model, the piston pin are divided into fine motion friction zone 20 and sliding
Friction zone 30, the fine motion friction zone 20 are located at the both ends outer round surface of the piston pin, and the sliding friction area 30 is located at two
Between a fine motion friction zone 20, which is characterized in that the piston pin outer round surface is equipped with cloth oil texture, the fine motion friction
Area 20 sets anti-extrusion texture, and the sliding friction area 30 sets sliding antifriction texture.The fine motion friction zone 20 is piston pin and work
Plug pin hole mating area, length of fit is L to unilateral matching surface in the axial direction20；The sliding friction area 30 be piston pin with
Connecting rod small end hole bushing mating area, length of fit is L to matching surface in the axial direction30。
As shown in Figures 2 and 3, the cloth oil texture is the spiral micro groove 15 circumferentially uniformly distributed along piston pin.The spiral
15 quantity N of micro groove is 2~5；The screw pitch L of the spiral micro groove 1515=0.2L~L, wherein L is piston pin length；Spiral
Dimple groove width B15It is 15~100 μm；Spiral micro groove depth H15It is 1~20 μm.
The anti-extrusion texture is the anti-extrusion dimple chamber 25 for being evenly arranged on the fine motion friction zone 20, and the sliding antifriction is knitted
Structure is the sliding antifriction dimple chamber 35 for being evenly arranged on the sliding friction area 30, the anti-extrusion dimple chamber 25 and sliding antifriction dimple
The shape of chamber 35 is that hemispherical is parabola shaped or cylindrical.
As shown in Figure 5 and Figure 6, the 25 section maximum dimension D of anti-extrusion dimple chamber25It is 20~300 μm；It is described anti-extrusion
25 depth H of dimple chamber25It is 5~30 μm；The axial length of the fine motion friction zone 20 is L20, the anti-extrusion texture is described
The axial length of fine motion friction zone 20 is L2, and L2=(0.5~1) L20.Anti-extrusion 25 rectangular array of dimple chamber is described
Fine motion friction zone 20, it is describedIt is describedWherein, a25It is rectangular array in the inclined of circumferencial direction
Away from b25It is rectangular array in axial offset distance, e25For the column offset distance of anti-extrusion 25 circumferencial direction of dimple chamber of adjacent two column.
As shown in Figure 7 and Figure 8, the 35 section maximum dimension D of sliding antifriction dimple chamber35It is 20~300 μm；The sliding
35 depth H of antifriction dimple chamber25It is 1~20 μm；The axial length in the sliding friction area 30 is L30, the sliding antifriction texture
Axial length in the sliding friction area 30 is L3, and L3=(0.5~1) L30.The 35 rectangle battle array of sliding antifriction dimple chamber
It is listed in the sliding friction area 30, it is described It is describedWherein, a35For rectangular array
In the offset distance of circumferencial direction, b35It is rectangular array in axial offset distance, e35For 35 circumference of sliding antifriction dimple chamber of adjacent two column
The column offset distance in direction.
The production method of piston pin described in the utility model, includes the following steps：Machining piston pin；Laser machine cloth oil
Texture；Laser machine anti-extrusion texture and sliding antifriction texture.
Step 1, selection completes machining, obtains the piston pin of outer dimension, and does not carry out surface hardening processing；
Step 2, pre-treatment, the roughness parameter model that pre-treatment rear surface reaches are carried out to selected piston pin outer round surface
It encloses：Ra≤0.8 μm, Rz≤3.2 μm, Rpk≤0.15 μm, Rvk≤0.4 μm, circularity and cylindricity≤0.01mm；
Step 3, using solid state laser or optical fiber laser, according to the design scheme of cloth oil texture to the work after pre-treatment
Plug pin outer round surface carries out the processing of cloth oil pattern, specific laser processing parameter：Optical maser wavelength 532nm or 1064nm, defocusing amount [-
1.2mm, 1.2mm], pulse width [50ns, 500ns], pulse frequency [1Hz, 10KHz], laser energy density [106W/cm2,
108W/cm2], pulse laser beam overlap ratio [40%, 90%], auxiliary gas is nitrogen or pressure-air or inert gas, assists gas
Body air blowing angle and processing stand normal are at 0-60 °；
Step 4, using solid state laser or optical fiber laser, according to the design for resisting anti-extrusion texture and sliding antifriction texture
Scheme carries out the processing of antifriction pattern, specific laser processing parameter to the piston pin outer circle matching surface after cloth oil texture：Laser wave
Long 532nm or 1064nm, defocusing amount [- 1.2mm, 1.2mm], pulse width [50ns, 500ns], pulse frequency [1Hz,
10KHz], laser energy density [106W/cm2,108W/cm2], auxiliary gas is nitrogen or pressure-air or inert gas, auxiliary
Gas air blowing angle and processing stand normal are at 0-60 °.
The embodiment is the preferred embodiment of the utility model, but the utility model is not limited to above-mentioned embodiment party
Formula, without departing substantially from the substantive content of the utility model, those skilled in the art can be made any apparent
Improvement, replacement or modification belong to the protection scope of the utility model.
Claims (8)
1. a kind of piston pin, the piston pin is divided into fine motion friction zone (20) and sliding friction area (30), the fine motion friction zone
(20) it is located at the both ends outer round surface of the piston pin, the sliding friction area (30) is located at two fine motion friction zones (20)
Between, which is characterized in that the piston pin outer round surface is equipped with cloth oil texture, and the fine motion friction zone (20) sets anti-extrusion knit
Structure, the sliding friction area (30) set sliding antifriction texture.
2. piston pin according to claim 1, which is characterized in that the cloth oil texture is the spiral shell circumferentially uniformly distributed along piston pin
It revolves micro groove (15).
3. piston pin according to claim 2, which is characterized in that spiral micro groove (15) the quantity N is 2~5；It is described
The screw pitch L of spiral micro groove (15)15=0.2L~L, wherein L is piston pin length；Spiral dimple groove width B15For 15~100 μ
m；Spiral micro groove depth H15It is 1~20 μm.
4. piston pin according to claim 1-3, which is characterized in that the anti-extrusion texture is described to be evenly arranged on
The anti-extrusion dimple chamber (25) of fine motion friction zone (20), the sliding antifriction texture is to be evenly arranged on the sliding friction area (30)
Slide antifriction dimple chamber (35), the anti-extrusion dimple chamber (25) and sliding antifriction dimple chamber (35) shape be hemispherical or
It is parabola shaped or cylindrical.
5. piston pin according to claim 4, which is characterized in that anti-extrusion dimple chamber (25) the section maximum dimension D25
It is 20~300 μm；Anti-extrusion dimple chamber (25) depth H25It is 5~30 μm；The axial length of the fine motion friction zone (20)
For L20, the anti-extrusion texture is L in the axial length of the fine motion friction zone (20)2, and L2=(0.5~1) L20。
6. piston pin according to claim 4, which is characterized in that anti-extrusion dimple chamber (25) rectangular array is described
Fine motion friction zone (20), it is describedIt is describedWherein, a25It is rectangular array in the inclined of circumferencial direction
Away from b25It is rectangular array in axial offset distance, e25For the column offset distance of anti-extrusion dimple chamber (25) circumferencial direction of adjacent two column.
7. piston pin according to claim 4, which is characterized in that sliding antifriction dimple chamber (35) section maximum gauge
D35It is 20~300 μm；Sliding antifriction dimple chamber (35) depth H25It is 1~20 μm；The axial direction of the sliding friction area (30)
Length is L30, the sliding antifriction texture is L in the axial length of the sliding friction area (30)3, and L3=(0.5~1) L30。
8. piston pin according to claim 4, which is characterized in that sliding antifriction dimple chamber (35) rectangular array is in institute
It states sliding friction area (30), it is described
It is describedWherein, a35It is rectangular array in circumference side
To offset distance, b35It is rectangular array in axial offset distance, e35Sliding antifriction dimple chamber (35) circumferencial direction arranged for adjacent two
Column offset distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820491456.6U CN208138463U (en) | 2018-04-09 | 2018-04-09 | A kind of piston pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820491456.6U CN208138463U (en) | 2018-04-09 | 2018-04-09 | A kind of piston pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208138463U true CN208138463U (en) | 2018-11-23 |
Family
ID=64291304
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820491456.6U Expired - Fee Related CN208138463U (en) | 2018-04-09 | 2018-04-09 | A kind of piston pin |
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| Country | Link |
|---|---|
| CN (1) | CN208138463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730513A (en) * | 2018-04-09 | 2018-11-02 | 江苏大学 | A kind of piston pin and preparation method thereof |
-
2018
- 2018-04-09 CN CN201820491456.6U patent/CN208138463U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730513A (en) * | 2018-04-09 | 2018-11-02 | 江苏大学 | A kind of piston pin and preparation method thereof |
| CN108730513B (en) * | 2018-04-09 | 2024-07-30 | 江苏大学 | Piston pin and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 Termination date: 20200409 |