Transmission Cases, like engineblocks, are all automotives key components. Also, transmission case is afundamental part of transmission. It generates Input assembly, Take-off assembly,and gearshift assembly of transmission together as a whole according to certainrelative position. In addition, it supports the output shaft for torque outputaccording to certain relationships of transmission ratio. The machining qualitydirectly affects the accuracy of assembly, performance of movement, flexibilityof gear shifting, noise of gears, sealed performance and lifetime forTransmission Assembly. Therefore, the performance of transmission assembly isdetermined by the machining quality of Transmission Cases.
Transmission Cases are often not in a regular shape with multiple partsfor machining, and the machining techniques are so complex that variousmachining operations needed to complete the machining. Double intermediate shafttransmission case is a typical grey cast iron part with thin-walled. Its mainbody includes main tank and vice tank. There are three center holes in thefloor. The vice tank is opening on one side, with 5 through holes on it withthe size of 510mm * 350mm * 480mm. The workpiece material is HT 200. (Grey CastIron with HB180)
Face milling
Tool:FMD02-080-A27-PN11-08
Insert:YBD152/PNEG110512R-CM
Cutting data:Vc=
Hole-making
Tool:1534SU03 series drill
Cutting data:Vc=60~
Counterboring
Tool:GM-4E Series Solid Carbide Endmills
Cuttingdata:Vc=80m/min,fz=0.15mm/z
Hole Chamfering
Tool:1143SC90-2000
Cutting data:Vc=150m/min,fr=0.2mm/r
Reaming
Tool:3102H7 seriesreamer
Cutting data:Vc=
hread machining
Tool:4202C seriestap
Cutting data:Vc=10~
Machining for Boss Face
Tool:EMP01-032-XP32-AP11-04
Cutting data:Vc=
Shallow Hole-making (Φ27)
Tool:ZTD03-250-XP25-SP07-02
YBG205/SPGT07T308-PM
YBG212/SPGT07T308-PM
Vc=
Boring and chamfering (Φ27)
Tool: Tailor-made Complex Tools (Boring and Chamfering)
Cuttingdata:Vc=
Thread machining
Tool:ThreadMilling Cutters
Cutting data:Vc=
Internal Chamber
Taperangle Machining
Tool:Tailor-madeComposite Tapper Drills
Cutting data:Vc=35m/min,fr=0.15mm/r
Boring
Tool:Double-edged Modular Rough Boring Tools
Insert:YBD152/CCMT120408-HM
Cutting data:Vc=
Internal BackBoring
Tool: New type Finish Boring Tools
Cutting data:Vc=150m/min,fz=0.1mm/z