UNDERCUTTING MACHINE FOR MICANITE INSULATION OF FLAT COMMUTATORS OF DC MOTOR ARMATURES (ACM75)

ACM75 automatic machine is designed for the undercutting of the micanite insulation between the flat commutator bars of starters and other DC electric motors. It is especially suitable for processing of new or rebuilding of old car starter armatures.
The machine is equipped with highly reliable indexing mechanism with photo-electric sensor and step-motor drive, ensuring automatic determination of the commutator bar number and perfect alignment of mica segment with the tool. Automatic detection and ignoring of fault signals. A pneumo-mechanical sensoring mechanism is provided, ensuring the automatic maintaining of the pre-set depth of cutting, irrespective of the commutator O.D. variations.

Capacity: 90 armatures/hour for commutator of 23 bars

#

Parameter

Value

1

Workpiece

Flat commutator of DC motor armature

Maximum armature shaft length, mm

300

Maximum armature stack O.D., mm

74

Commutator O.D. range, mm

40...70

Minimum commutator I.D., mm

14

2

Spindle unit

Rotation speed, RPM

6000 .. 15000

AC drive motor power, kW

0.37

3

Milling tool

Ф12.7 x Ф4.76 x 1.1mm
Ф8 x Ф2.5 x 1.3 mm
or Ф8.4 x Ф3.175 x 1.6 mm
carbide slitting saw

4

Feeding unit

pneumo-hydraulic actuator

Total slide stroke, mm

50

Maximum working stroke, mm

40

Feed rate range, m/min

0.014...5

5

Cutting depth setting-up mechanism

Pneumatically counter-balanced cradle with feeler and brake

Maximum vertical travel of the spindle, mm

22

Depth adjusting screw dial reading, mm

0.1

6

Armature indexing mechanism

Step motor with toothed belt drive

Step motor type

KML062F07 WARNER ELECTRIC

Motor resolution, steps/rev

2000

Belt drive ratio

4.5:1

7

Tailstock quill drive

Pneumatic

Quill stroke, mm

42

Thrust, N

2200

8

Power supply, V

upon request

9

Air pressure supply, MPa

0.5

10

Overall dimensions: length/width/height, mm

700/665/1360

11

Weight, kg

350