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Engine block

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Case Details

This trial cut is an improved version.

Customer objective:

1. Improve issues such as insufficient surface finish and burrs in existing products.

2. Improve production efficiency.

3. Cost savings.

Tool-testing results;

1. Perfect surface finish and flawless marking; chamfering and burr issues resolved.

2. Approximately a 25% improvement in current efficiency.

3. Production costs remained broadly stable.

 

Cylinder Bore Machining

Client: A Certain Automobile Joint-Stock Company

Workpiece: PUMA 2.2/2.4 Cylinder Block

Material: GG25

Machining equipment: Starragheckert HEC500

 

 
 
Processing step: OP130B
Processing content:
1. Semi-precision boring of cylinder bores
2. Chamfering of cylinder bore openings
3. Precision Boring of Cylinder Holes
 
 
Semi-finish machining of cylinder bores
Cutting tool: Semi-precision boring step boring tool for cylinder bores
Cutting parameters:
Φ89.4 Z=6 (SCGW 09T308 BN081)
VC=850 m/min n=3000 rpm
Fz=0.16 F=2880 mm/min
 
 
Cylinder Bore Finish Machining
Cutting Tool: Precision Boring Tool for Cylinder Holes (with Internal Coolant Supply)
Cutting parameters:
Φ89.86±0.02 Z=3 (SCGW 09T308 E BN081)
VC=850 m/min n=3000 rpm
Fz=0.1 F=900 mm/min
 

 

Crankshaft Hole Machining

 
Processing step: OP140B

Processing Content:

1. Semi-precision boring of crankshaft holes
2. Precision Boring of Crankshaft Holes
3. Finish-turning the thrust face
 

Semi-finishing of crankshaft holes

Cutting tools: Φ69-0.1 / Φ74-0.1 / 45° chamfer
Semi-precision boring composite line boring tool for crankshaft holes
The semi-precision boring of the crankshaft bores and the chamfering of both ends of the crankshaft bores are completed in a single machining operation.
Z=1 (SCGW 09T304 LC610T)
 
Cutting parameters:
VC = 100 m/min n=460 rpm
Fz=0.15 F= 69mm/min
 

Fine Machining of the Thrust Surface of the Crankshaft Bore

Φ104.2 Precision Turning Thrust Face Contact Type Moving Cutting Tool
The thrust surfaces are machined in a single pass for semi-finish and finish turning.
Z=1 (CPGW 09T304 LC610T)
 
Cutting parameters:
VC=120 m/min n=280 rpm

Fz=0.2 F= 56 mm/min

 

Crankshaft Hole Finish Machining

Φ69.46±0.015 Precision Boring Tool for Crankshaft Hole Boring Z=1 (SCGW 09T304 LC610T)

Compared with conventional precision boring units, KIEINIGER’s semi-circular precision boring tool holder provides superior section strength for the boring bar, thereby enhancing its rigidity.

Cutting parameters:
 
VC = 125 m/min
n=570 rpm
Fz=0.15
F=86 mm/min

Case Consultation

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