Front axle main pin capable of preventing fatigue fracture of automobile front axle main pin hole and manufacturing method of front axle main pin
A technology of automobile front axle and fatigue fracture, which is applied to the surface coating liquid device, metal material coating process, bolts, etc., can solve the problems of product structure change, improve fatigue strength, reduce friction, ensure durability abrasive effect
Active Publication Date: 2014-10-08
DONGFENG COMML VEHICLE CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although the invention can reduce the peak braking stress effect when the car is braking through the ribs, thereby improving the fatigue strength of the kingpin hole, the design changes the product structure and cannot meet the existing needs
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0070] see figure 1 – figure 2 , a front axle kingpin for preventing the fatigue fracture of the kingpin hole of the front axle of the automobile, comprising the kingpin hole and the kingpin, the kingpin hole is located at the two ends of the front axle of the automobile, the inner wall of the kingpin hole and the outer surface of the kingpin Transition fit; the outer surface of the kingpin is a layered structure, which successively includes a kingpin substrate 1, a manganese salt phosphating film layer 2, and a molybdenum disulfide layer 3, and the manganese salt phosphating film layer 2 is composed of a plurality of highly dispersed The phosphating particles 21 with degree distribution are piled up, and a plurality of micropores 22 are formed on the manganese salt phosphating film layer 2. The molybdenum disulfide layer 3 is formed by stacking a plurality of molybdenum disulfide particles 31. The bottom of the film layer 2 and the top of the main pin substrate 1 are embedd...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a front axle main pin capable of preventing fatigue fracture of an automobile front axle main pin hole. The front axle main pin comprises a main pin hole and a main pin in the main pin hole, wherein the outer surface of the main pin adopts a layer structure; the main pin sequentially comprises a main pin base body, a manganate phosphating film layer and a molybdenum disulfide layer; the bottom of the manganate phosphating film layer is embedded with the top of the main pin base body; the top of the manganate phosphating film layer is embedded with the bottom of the molybdenum disulfide layer in a mutual engagement manner. The manufacturing method of the front axle main pin comprises the following steps: cleaning and activating the surface of the main pin through a pretreatment process, and forming an embedded structure that the manganate phosphating film layer is engaged with the molybdenum disulfide layer on the surface of the main pin through a manganate phosphating process and a molybdenum disulfide spraying process in sequence. According to the design of the front axle main pin, the fatigue strength of the front axle main pin hole can be improved through surface engineering on the premise of not changing the product structure; moreover, the force of adhesion between film layers can be increased, and the composite film layer is ensured to have a good antifriction effect.
Description
technical field [0001] The invention belongs to the field of surface engineering of metal products, and relates to a front axle kingpin which prevents the fatigue fracture of the kingpin hole of the front axle of an automobile and a manufacturing method thereof, and is particularly suitable for reducing friction through surface engineering without changing the product structure The effect is to improve the fretting fatigue life of the kingpin hole of the automobile front axle. Background technique [0002] During the operation of a certain type of engineering vehicle, due to the heavy load, the kingpin hole of the front axle frequently fractured early, which limited its bearing capacity. The analysis confirmed that the fracture mode of the kingpin hole was fretting fatigue fracture. [0003] The kingpin and the kingpin hole are positioned by the taper pin and transition fit, the bending moment from the wheel acts on both ends of the kingpin through the steering knuckle, and ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F16B19/02C23C22/18B05D1/12B05D3/02
Inventor 高亮庆张峰
Owner DONGFENG COMML VEHICLE CO LTD