A kind of gear preparation method for oil pump
An oil pump and gear technology, which is applied in the field of gear preparation for oil pumps, can solve problems such as being unsuitable for the use of oil pumps, and achieve the effects of low noise, stable transmission and good performance.
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[0019] Referring to the accompanying drawings, a method for preparing a gear for an oil delivery pump includes the following steps:
[0020] 1) Casting and molding gear blanks, the weight percentages of the chemical components of each component are: C: 2.85-3.25%, Si: 1.2-1.5%, Mn: 0.8-1.2%, P: 0.6-0.8%, S: 0.05-0.07% , Cr0.24-0.35%, Cu0.7-0.9%, the temperature of the poured gear blank is reduced to 300°C, then heated to 650-760°C, kept for 3-5 hours, cooled to 300°C, kept for 4 hours, Reheat to 650-760°C, keep warm for 17 hours, cool to 450°C at 50°C / hour, then cool to 140°C at 20°C / hour; heat treatment repeated twice;
[0021] 2) Choose a CNC lathe, choose a carbide tool for the tool, and carry out the finishing turning of the large end a to 18.6±0.2mm, the small end b to 6.1±0.05mm, the outer diameter e to φ74.1±0.1mm and Chamfering, inner hole c to φ38.5±0.1mm;
[0022] 3) Choose a CNC lathe, choose a carbide cutter for the tool, and carry out the finish turning of the o...
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