Method for manufacturing armatures

• US 5,544,409 A
• Filed: 06/07/1995
• Issued: 08/13/1996
• Est. Priority Date: 04/28/1994
• Status: Expired due to Fees

• Current Assignee: Globe Products Incorporated
• Original Assignee: Globe Products Incorporated
• Inventors: Beakes, John M., Zicht, E. Wayne
• Primary Examiner(s): Hall, Carl E.
• Application Number:
  US08/473,083
• Time in Patent Office: 433 Days
• Field of Search: 29/281.4, 29/559, 29/596, 29/598, 29/732, 29/733, 29/735, 29/736, 29/759, 29/760, 198/394, 198/401, 414/754, 414/751, 414/780, 414/783
• US Class Current: 29/598
• CPC Class Codes: H02K 15/028 for fastening to casing or support, respectively to shaft or hub
• CPC Class Codes: H02K 15/165 Balancing the rotor
• CPC Class Codes: H02K 7/04 Balancing means
• CPC Class Codes: H02K 7/075 using crankshafts or eccentrics
• CPC Class Codes: Y10T 29/49011 Commutator or slip ring assembly
• CPC Class Codes: Y10T 29/49012 Rotor
• CPC Class Codes: Y10T 29/53078 with means to fasten by frictional fitting
• CPC Class Codes: Y10T 29/53143 Motor or generator
• CPC Class Codes: Y10T 29/53148 Means to assemble commutator
• CPC Class Codes: Y10T 29/53261 Means to align and advance work part
• CPC Class Codes: Y10T 29/53265 with work-holder for assembly

Abstract

An armature shaft having a cam body extending from one end thereof is inserted into a shaft-receiving transfer block of an armature lamination and shaft assembly machine so that the cam body has a desired angular orientation relative to the axis of rotation of the armature shaft. A stack of laminations with which the shaft is assembled is also angularly oriented.

Claims

1. A method for rotationally orienting an armature shaft having a cam body extending from one end thereof before said shaft is inserted into a shaft-receiving transfer block of an armature lamination and shaft assembly machine so that said cam body has a desired angular orientation relative to the axis of rotation of said armature shaft, said method comprising the steps of:

providing a powered ram movable along a predetermined axis, said ram having a nosepiece provided with a socket having a size and shape to slidably receive the cam body, with said socket being located relative to said predetermined axis in the same rotational orientation as said desired orientation of said cam body relative to said axis of rotation of said armature shaft;

providing an abutment in confronting alignment with said ram;

supporting said armature shaft so that its axis of rotation is aligned with said predetermined axis;

actuating said ram so that said nosepiece presses on said one end of said armature shaft and the opposite end thereof is extended into engagement with said abutment; and

while maintaining pressure on the ends of said armature shaft, rotating said armature shaft until said cam body is rotationally aligned with said socket in said ram nosepiece whereupon said ram nosepiece slides over said cam body.

2. The method of claim 1 further comprising the steps of:

after said ram nosepiece slides over said cam body, moving said abutment from confronting alignment with said ram; and

while maintaining said rotational alignment of said cam body, inserting said shaft into said transfer block.

3. The method of claim 1 wherein said step of rotating said shaft comprises:

providing a hollow transfer tube between said ram nosepiece and said abutment into which said shaft is inserted when said ram is actuated to extend said shaft into engagement with said abutment, said transfer tube having a wall provided with a slot opening to the hollow interior of said tube;

clamping said armature shaft to said transfer tube by a rotationally driven clamp mechanism having a movable clamp jaw located within said slot, said jaw engaging the portion of said shaft exposed by said slot so that said shaft is compressively clamped to said tube; and

rotating said tube and said shaft together by rotationally driving said movable clamp jaw while shaft is clamped to said tube.

4. The method of claim 3 wherein said step of rotating said shaft further comprises repeatedly rotating said shaft in one direction and, after each rotation, moving said movable clamp jaw out of clamping engagement with said shaft and reversely rotating said clamp jaw to reversely rotate said tube while said shaft is held stationary by the pressure exerted on its ends.