PMD Series en

PM- / PMD-SERIES

Crankshaft grinding machines

Crankshaft grinding machines with CBN technology: single-wheel machines, dual-slide machines with up to four grinding spindles or angle plunge grinding machines.

crankShaft Grinding

PM 2

2

Working range – Swing diameter, max.

200 mm

Workpiece length, max.

700 mm

PMd 2 Working range – Swing diameter, max.

200 mm

Workpiece length, max.

700 mm

Grinding wheel diameter

550 mm

Grinding wheel diameter

550 mm

Workpiece weight, max.

50 kg

Workpiece weight, max.

50 kg

8 inch

27.5 inch 21.5 inch 110 lb

8 inch

27.5 inch 21.5 inch

110 lb

PM 310 PM(D) 320 320 mm

320 mm

1,250 mm

1,800 / 1,500 mm

Grinding wheel diameter

650 mm

650 mm

Workpiece weight, max.

80 kg

250 kg

Working range – Swing diameter, max.

Workpiece length, max.

13 inch 50 inch

25.5 inch

176 lb

13 inch

71 / 59 inch 25.5 inch

550 lb

PM 430

PM 460

750 mm

750 mm

3,000 mm

6,800 mm

Grinding wheel diameter

900 / 1,400 mm

1,400 mm

Workpiece weight, max.

3,000 kg

5,000 kg

Working range – Swing diameter, max.

Workpiece length, max.

29.5 inch 118 inch

35.5 / 55 inch

6,614 lb

29.5 inch 268 inch 55 inch

11,023 lb

3

Features of the PM 2 / PMD 2:

++ CBN technology also for grinding with radii and shoulders

++ Oscillating stroke grinding of pin bearings with centrally c­ lamped workpieces

++ Maximum productivity through

Machining Automobile Crankshafts with the PM 2 / PMD 2 Standard features include 30 kW motor spindles for the grinding wheels and a workpiece headstock with a direct drive unit, as well as a stable tailstock and a linear motor for the X-axis. Emulsion or oil can be used as the cutting fluid for the grinding process. Thanks to the integrated oscillating stroke technology, pin and center bearings can be ground in a single clamping operation.

s­ imultaneous grinding using independent grinding units

++ X-axis drive system with

­antibacklash linear motor

++ Workpiece headstock with direct drive

++ Hydrostatic guide track (X-axis) ++ In-process measurement control systems

++ Grinding spindle with direct drive (30 kW)

++ Integrated roundness

­monitoring and error correction

P M 2 / P MD 2

++ Automatic self-centering steady tests

Available Options:

++ Electronic axial / radial ­alignment

++ B-axis for additional grinding spindles / wheels

++ Cutting fluid supply ++ Grinding mist extraction system ++ Interface to automated loading system

Technical data Workpiece »»Grinding length / Workpiece length »»Workpiece weight »»Oscillation circuit »»Rapid-traverse rate X- / Z-axis

700 mm

27.5 inch

50 kg

110 lbs

200 mm

8 inch

30 / 30 m/min

1,181 / 1,181 ipm

Grinding headstock »»Wheel diameter

550 mm

»»Spindle capacity

30 (40) kW

»» Peripheral surface speed »»X-axis Control system

4

PM 2 / PMD 2

SIEMENS SINUMERIK 840D sl

21.5 inch

40 (54) hp

125 (200) m/s

410 (656) ft/s

Hydrostatic system and linear motor

Power

Integrated Quality Management Correction values, determined using the EMAG "Roundness Testing“ software package, are used to optimize the grinding process.

»» Roundness measurement: using the post-process diameter measuring device on the finish-ground bearing »» Roundness correction: correction values are calculated and confirmed by the operator »» Grinding with optimized values: the next workpiece is then ground using the corrections »» Optional: processing of correction data from an external measuring machine possible

2µ

The benefits at a glance ++ Fast verification

and o ­ ptimization of ­roundness

++ Ease of operation

5

efficiency Automobile C RANKSHAFT s

PMD 2 – dual-slide machine for highly productive, flexible production grinding of crankshafts up to 700 mm in length.

15 mm 15mm

»» Simultaneous grinding of two pin bearings

X2

X1

»» Simultaneous grinding of center and pin bearings in the same clamping operation »» Minimum spacing between grinding wheels: 15 mm

WSS

Workpiece Spindle Stock

6

RS

Tailstock

Example of a Complete Grinding Process for a 4-Cylinder Automobile Crankshaft.

Machine 1:

Machine 2:

Machine 3 / 4:

PRE-GRINDING the PIN and main bearings (optional)

Finish grinding the PIN and main bearings

Flange and Post End grinding

PMD 2

PMD 2

HG 2

Pre-grinding the pin and main bearings, including the shoulders

Finish grinding the pin and main bearings

Finish grinding the post ends

Finish grinding the flanges

7

flexible

Machine Variations for Crankshafts Production Several versions of the oscillating stroke grinding machine for machining the main and pin bearings are available.

Tool system: »» Simultaneous grinding with two CBN grinding wheels (oscillating stroke grinding / circular grinding) with the PMD 2 »» Grinding wheel diameter 550 mm »» Minimum wheel spacing 15 mm (PMD 2) »» Grinding spindle with direct drive (30 / 40 kW) »» Automatic balancing system »» Face wheel dressing device for dressing the diameter, radii and, if necessary, the flat ends »» X-axis: hydrostatic system & linear motor

Automobile C RANKSHAFT s

Workpiece clamping between tips: »» Workpiece direct drive, 40 mm stroke »» Tailstock: 150 mm stroke, adjustable clamping pressure »» Self-centering steady Control system, measuring systems and sensors: »» Control system: SIEMENS SINUMERIK 840D sl »» In-process measurement with a diameter gauge head »» Integrated roundness check and correction (EMAG system) »» Alignment of axial position and angular position using a 2.5 D probe »» Scanning & dressing with acoustic emission sensors

8

PM 2 SINGLE-SLIDE GRINDING MACHINE

PMD 2 Dual-slide GRINDING MACHINE

Single-slide grinding machine PM 2

Dual-slide grinding machine PMD 2

Dual-slide machine with B-axis PMD 2-B

B

9

compact HG 2 0 4 / HG 2 0 8

10

HG 204 / HG 208 – Angle Plunge Grinding Machine for Flanges or Journals Machine and equipment details: »» Grinding with aluminum oxide or CBN grinding wheels »» Workpiece clamping between tips »» Motor spindle for the grinding wheel »» Workpiece drive »» Linear guides on X- and Z-axes »» Ball screw for X- and Z-axes »» Absolute measuring systems on X- and Z-axes »» SIEMENS SINUMERIK 840D sl »» MARPOSS in-process measurement control system with UNIMAR measuring heads »» Possibility of connection to an external cutting fluid supply »» Possibility of connection to an external grinding mist extraction system

Versions of circular grinding machines for machining flanges, journals and thrust bearings

Single-slide angular infeed machine HG 204 / HG 208 Flange or journal ­machining (15° / 30° angle)

Single-slide machine with B-axis HG 204 / HG 208 Flange or journal ­machining (15° / 30° angle)

B

Dual-slide machine HG 208 Thrust bearing and flange or journal machining

Dual-slide machine (external and internal grinding) HG 208i Flange machining ­including bearing ­borehole

11

Special features of the PM 320 / PMD 320:

++ CBN technology also for grinding with radii and ­shoulders

++ Oscillating stroke grinding of pin bearings with centrally clamped ­workpieces

++ Maximum productivity by

s­ imultaneously grinding using independent grinding units

++ X-axis drive system with

­antibacklash linear motor

++ Workpiece headstock with direct drive

++ Hydrostatic guide track (X- and Z-axes)

++ In-process measurement control systems

++ Grinding spindle with direct drive (55 kW)

++ Integrated roundness

­monitoring and error correction

P M 3 2 0 / P MD 3 2 0

++ Automatic self-centering steady tests

Available Options:

++ Electronic axial / radial ­alignment

++ Cutting fluid supply ++ Grinding mist extraction system ++ Interface to gantry loader

12

Machining Truck Crankshafts with the PM 320 / PMD 320 A wide range of machine options can be configured to suit the manufacturing task at hand with the modular system of the PM 320 / PMD 320. Whether it is grinding center or pin bearings on the same machine in a single clamping ­operation or on separate machines using the classic method – the decision ­depends on the production requirements.

PM 320

PMD 320

1,800 mm

1,500 mm

250 kg

250 kg

320 mm

320 mm

25 / 25 m/min

25 / 25 m/min

650 mm

650 mm

125 (200) m/s

125 (200) m/s

emulsion or grinding oil

emulsion or grinding oil

Workpiece »»Workpiece length, max. »»Workpiece weight »»Swing dia., max. »»Rapid-traverse rate X- / Z-axis

71 inch 550 lb

12.5 inch

984 / 984 ipm

59 inch 550 lb

12.5 inch

984 / 984 ipm

Grinding headstock »»Wheel diameter »»Cutting speed, max. »»Cutting fluid Control system SIEMENS SINUMERIK 840D sl

25.5 inch

25.5 inch

precision

Technical data

Machining area of the PMD 320 dual-slide grinding machine (simultaneous grinding)

13

Main features of the PM 430 / PM 460

++ Oscillating stroke grinding of

large crankshafts: grinding main and pin bearings on the same machine.

++ Use of conventional aluminum oxide grinding wheels or CBN grinding wheels

++ High productivity coupled with high flexibility

Machining Large Crankshafts with the PM 430 / PM 460 The PM 430 / PM 460 are fitted with linear motors and hydrostatic guideways in the X- and Z-axes to ensure maximum dynamics and excellent grinding results.

The workpiece spindle is directly driven by a torque motor. Workpieces with a length of 3,000 mm or longer are powered from both sides.

When using aluminum oxide, the grinding wheel is powered by a motor and belt drive. CBN grinding wheels are powered through a motor spindle.

The fully cased machine is fitted with large automatic front doors, providing ­excellent access to the machining area.

++ Fully automatic, semi-automatic or manual grinding processes possible

++ In-process diameter m ­ easurement for maximum precision and ­roundness check in the machine

PM 430 / PM 460

++ Universal axial and radial

alignment of the shaft prior to grinding to ensure the highest possible component quality and maximum flexibility

++ Very rigid 2-axis NC steady rests for excellent crankshaft support

Technical data

PM 430 PM 460

Capacity »»Workpiece length, max.

3,000 mm

6,800 mm

»»Workpiece weight, max.

3,000 kg

5,000 kg

»»Swing diameter, max., with aluminum oxide wheel

750 mm

750 mm

»»Swing diameter, max., with CBN wheel

500 mm

20 inch

–

1,400 mm

1,400 mm

900 mm

35.5 inch

–

45 m/s

45 m/s

125 m/s

–

118 inch

6,614 lb

29.5 inch

268 inch

11,023 lb

29.5 inch

Grinding wheels »»Diameter, aluminum oxide wheel »»Diameter, CBN wheel »»Cutting speed, max., with aluminum oxide wheel »»Cutting speed, max., with CBN wheel »»Cutting fluid Control system SIEMENS SINUMERIK 840D sl

14

55 inch

55 inch

Emulsion

15

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Subject to technical changes.

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