Preparing method of gear for fuel delivery pump
A technology for oil delivery pumps and gears, which is applied in the field of gear preparation for oil delivery pumps, can solve problems such as not being suitable for the use of oil delivery pumps, and achieve the effects of low noise, strong bearing capacity, and stable transmission
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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% , Cr 0.24-0.35%, Cu 0.7-0.9%, 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, and then heated Heat 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; repeat heat treatment 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 of the gear 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±0.1 mm;
[0022] 3) Choose a CNC lathe, choose a carbide tool for the tool, and perform fini...
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