Invech Precision Co.,Ltd with many UAV case,it reflected in the Partner that engaged in UAV & Manned Helicopter and Multi rotor Designs, Advanced Aircraft have over 30 years extensive experience. The technical director was the founder of three different companies from start up to full-production, while establishing all the separate departments, fabrication procedures, manufacturing-lines and training of the personnel in their respective jobs.
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1.Material: 45 steel. 2.The acute angle is blunt. 3.All chamfering C1.
1.Part drawing analysis
1) The part material is 45 steel.
2) Taking the centerline of the inner hole of ϕ140H6 as the reference, the coaxiality tolerance of the outer circle of ϕ147g6 and the reference is ϕ0.04mm.
3) Left and right ϕ140H6 inner hole coaxiality tolerance is ϕ0. 01mm.
1) This part is long and thin. In order to ensure the coaxiality of the inner and outer circles, when machining the outer circle of ϕ147g6 and ϕ169S7, the outer circle is machined by the clamping method of clamping the mandrel with nut. To process the inner hole of ϕ140H6, one end is usually used, and the outer circle is supported by the center frame at the other end.
2) ϕ140H6 The surface quality of the inner hole is required to be high. When grinding, a suitable grinding wheel and cutting should be selected.
Sleeve machining process (unit: mm)
|Part Name||Blank species||Material||Production type|
|Sleeve||Forging||45 # steel||Small batch|
|Process||Work step||Process content||Equipment||Tools, measuring tools, auxiliary tools|
|30||Rough turning||CNC lathe|
|1||Use a self-centering chuck to clamp one end of the outer circle of the blank, align, clamp, and turn the end face.||80° turning tool|
|2||Turning ϕ176 outer circle to ϕ179||80° turning tool|
|3||Adjust the direction of the parts; use the self-centering chuck clamp ϕ176 outer circle, align and clamp; turn the end face to ensure the total length 366||80° turning tool|
|4||Drill a center hole on the right end||Center drill|
|5||Use self-centering chuck to clamp ϕ176 outer circle, top center hole, turning ϕ169s7 outer circle to ϕ172||80° turning tool|
|6||Turning ϕ147g6 outer circle to ϕ172||80° turning tool|
|7||Use self-centering chuck to clamp the outer circle of ϕ176, the center frame supports the outer circle of ϕ169s7, and bore the inner hole to ϕ135||Boring tool|
|40||Fine turning||CNC lathe|
|1||Use a self-centering chuck to clamp the outer circle of the right end, the center frame supports the outer circle of ϕ169s7, turning the left end face||35° turning tool|
|2||Turning ϕ176 outer circle, surface roughness Ra3. 2μm||35° turning tool|
|3||Adjust the direction, clamp the outer circle of ϕ176, the center frame supports the outer circle of ϕ169s7, align it, turn the right end face, leave a grinding allowance of 0.10, and ensure a total length of 361.10||35° turning tool|
|4||Turning ϕ147g6 outer circle, leaving grinding allowance 0.50||35° turning tool|
|5||Turning 3 × 0.5 empty slot, surface roughness Ra3. 2μm||Grooving knife|
|6||Turning R <0.2%||Arc knife|
|7||Turning external circle 3 × 15° chamfer done||35° turning tool|
|8||Clamp ϕ147g6 outer circle, the center frame supports the ϕ169s7 outer circle, align it, and finely boring the left ϕ140H6 inner hole, leaving a grinding allowance of 0.50||Fine Boring Tool|
|9||Turn around. Clamp ϕ176 outer circle, the center frame supports the ϕ169s7 outer circle, align it, and finely boring the right end ϕ140H6 inner hole, leaving a grinding allowance of 0.50||Fine Boring Tool|
|10||Boring ϕ142 inner hole, surface roughness Ra3. 2μm||Fine Boring Tool|
|11||Turning inside and outside round chamfer C1||35° turning tool|
|50||The right end surface is flat ground, surface roughness Ra1. 6μm||Flat grinding machine|
|60||Grind the outer circle||Cylindrical grinder|
|1||Install the nut to compress the mandrel, ground ϕ169 s7 outer circle, surface roughness Ra0. 8μm|
|2||Grinding ϕ147g6 outer circle, surface roughness Ra0. 8μm|
|70||Grind the inner hole||Internal grinding machine|
|1||Clamp ϕ176 outer circle, the center frame supports the ϕ169 s7 outer circle, and align it to 0.005 on the ground outer circle, grind the left end ϕ140 H6 into the inner hole, the surface roughness Ra0. 8 μm|
|2||Grinding the right end ϕ140H6 inner hole, surface roughness Ra0. 8μm|
|80||Inspect ϕ140H6 inner hole, ϕ169s7 outer circle, ϕ147g6 outer circle size, geometric tolerance and surface roughness||Inspection station|
|90||Oiling, packaging, warehousing||Warehouse|