Advancements in Single-Pass Bore Finishing - Systems Approach (pag. 5 of 10)

Advancements Manufacturers are continually pushing the envelope in regards to what can be accomplished with the singlepass Processo. Improved tool, fixture, and machine designs have allowed for increased production rates as well as improved bore precision. The following are some of the latest advancements that have been made. Cost Reductions: The following case histories are good examples of where component manufacturers were able to improve bore quality and dramatically reduce costs by switching from conventional Levigatura to the singlepass Processo.

Gears being finished with single-pass Processo

The bore finishing of transmission gears has traditionally been performed with I.D. rettifica or conventional Levigatura Processoes. More and more manufacturers are now switching over to the singlepass Processo for this operation and realizing costs savings as much as 50%. In the following Applicazioni perishable tool cost is less than $0.01 per part with the singlepass Processo verses over $0.02 per part with conventional Levigatura. Additional savings are also achieved by having a greater up time due to less frequent tool changes.

Diameter:	20.013mm	Length/Clearance:	15mm
Material:	SCM420H	Hardness:	HRC 58-64
Bore Type:	Thru	Stock Removal:	0.050mm
Tool Pass #1:	19.998mm	Diamond Size:	20/30
Tool Pass #2:	20.008mm	Diamond Size:	20/30
Tool Pass #3:	20.013mm	Diamond Size:	20/30

Bore Quality	Required	Achieved
Size:	±0.009mm	0.007mm
Taper:	0.008mm	<.004mm
Surface Finish:	0.8Ra	0.4/0.6Ra

Machine Type:	Engis Model # 0318-16 (6 Spindle Machine)
Coolant:	Water Based
Production:	480 Parts Per Hour/>2Cpk