Machining method of gears for one-way clutches
A processing method and technology of a one-way device, which are applied in the direction of metal material coating process, etc., can solve the problems of complex production process, and achieve the effects of simple steps, long service life and low cost.
Inactive Publication Date: 2012-06-20
宁波惠山汽配制造有限公司
View PDF1 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, its production process is complicated, and there are still improvements in machining accuracy and service life.
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 Construction
[0019] The gear of the present invention uses 20cr alloy structural steel as the gear raw material, and the raw material is annealed for the first time to reduce hardness, improve cutting performance, eliminate residual stress, stabilize size, and reduce deformation and crack tendency; the first annealing temperature is 850°C To 900 ° C, cold extrusion after annealing for 4 hours.
[0020] The cold extrusion process refers to the plastic deformation of the metal under high stress, which makes the gear structure formed by cold extrusion dense, and the metal fibers are continuous, and its fatigue strength and wear resistance are much higher than the existing cutting process. And in the present invention, one end of the cold-extruded one-way device is closed with a gear structure, and the closed structure provides additional bending strength for the gear, which is most suitable for the frequent and high-load working conditions of the automobile one-way device.
[0021] The cold e...
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 machining method of gears for one-way clutches, which belongs to the technical field of machining accessories of car starters and solves the problems that existing gear machining methods are low in precision and severe in environmental pollution and gears machined are short in service lives. The machining method includes: primarily annealing 20cr (chromium) at the annealing temperature ranging from 850 DEG C to 900 DEGC for four hours; forming a blank with an inner bore by placing the annealed 20cr into a mould at the room temperature and reversely extruding the 20cr by a punch with the impact force ranging from 30 tons to 60 tons so as to form the inner bore; annealing the blank with the inner bore secondarily at the annealing temperature ranging from 650 DEG C to 600 DEG C for two hours; and finally forming a gear for the one-way clutches by placing the secondarily annealed blank into a gear-form die and extruding the blank by a gear-form extruding die with the impact force ranging from 80 tons to 100 tons. The machining method of the gears for the one-way clutches is simple and low in cost and has low affection onto environments. The gears machined by the machining method are high in precision and long in service lives and particularly adaptable to operating environments with high work load and high-frequency action, such as the automobile starters.
Description
technical field [0001] The invention relates to a gear processing method, in particular to a gear processing method for a one-way device. Background technique [0002] The one-way gear is an important part of the car starter. When the engine works abnormally, it will have an impact on the starter, resulting in damage to the one-way gear. Therefore, the quality of the one-way gear is particularly important for the car starter. The existing one-way gear processing methods mostly use machining methods, which cause serious environmental pollution, high production costs, low production efficiency, short service life and low precision of the obtained gears. [0003] The Chinese patent with the publication number "CN1772431A" discloses a manufacturing method of the outer ring gear of the one-way gear of the external gear reduction type and its mold. It is cold-extruded on a press to form the outer ring gear of the one-way gear with star gear teeth. The rough billet is put into th...
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 Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14C23C22/36
Inventor 管国华
Owner 宁波惠山汽配制造有限公司