Multiple-spindle automatic lathe
First Claim
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1. A multiple-spindle automatic lathe comprising a rotatable spindle drum;
- a plurality of work spindles rotatably mounted about the interior of said spindle drum;
an individually controllable electric motor associated with each of said work spindles for rotatably driving the same;
said motors being supportably mounted in adjacent relationship in said spindle drum;
stationary frame means for supportably mounting said spindle drum;
means for indexing said spindle drum into a plurality of positions corresponding to the number of said work spindles;
each of said work spindles comprising the shaft of its associated electric motor;
said spindle drum having a supporting shaft end rotatably work spindles comprising the shaft of its associated electric motor;
said spindle drum having a supporting shaft end rotatably mounted on said stationary frame means;
current conducting slip rings mounted on said spindle drum shaft;
current-conducting means interconnecting said slip rings and said motors;
current-conducting brush means mounted on said stationary frame means for communication with an electrical supply for engaging said slip rings and energizing said motors by means of such electrical supply;
control means for controlling the speed of each electric motor and the angular disposition of its associated shaft;
said control means comprising angular position indicator means rotating synchronously with each of said spindles, and stationary signal-generating sensor means sensitive to the speed and angular disposition of said angular position indicator means.
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Abstract
The invention relates to a multiple-spindle automatic lathe with several work spindles. In accordance with the invention, each of the work spindles comprises an associated electric motor. Associated with the electric motors are supply devices with at least one stationary means fed from an external voltage source and at least one rotatable means cooperating therewith. Also provided are speed and position control devices comprising per work spindle one rotary angular position detector means each for absolute value angle coding including a detector rotating synchronously with the work spindle and a stationary sensor means.
50 Citations
12 Claims
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1. A multiple-spindle automatic lathe comprising a rotatable spindle drum;
- a plurality of work spindles rotatably mounted about the interior of said spindle drum;
an individually controllable electric motor associated with each of said work spindles for rotatably driving the same;
said motors being supportably mounted in adjacent relationship in said spindle drum;
stationary frame means for supportably mounting said spindle drum;
means for indexing said spindle drum into a plurality of positions corresponding to the number of said work spindles;
each of said work spindles comprising the shaft of its associated electric motor;
said spindle drum having a supporting shaft end rotatably work spindles comprising the shaft of its associated electric motor;
said spindle drum having a supporting shaft end rotatably mounted on said stationary frame means;
current conducting slip rings mounted on said spindle drum shaft;
current-conducting means interconnecting said slip rings and said motors;
current-conducting brush means mounted on said stationary frame means for communication with an electrical supply for engaging said slip rings and energizing said motors by means of such electrical supply;
control means for controlling the speed of each electric motor and the angular disposition of its associated shaft;
said control means comprising angular position indicator means rotating synchronously with each of said spindles, and stationary signal-generating sensor means sensitive to the speed and angular disposition of said angular position indicator means. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
- a plurality of work spindles rotatably mounted about the interior of said spindle drum;
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2. A multiple-spindle automatic lathe comprising a rotatable spindle drum;
- a plurality of work spindles rotatably mounted about the interior of said spindle drum; and
individually controllable electric motor associated with each of said work spindles for rotatably driving the same;
said motors being supportably mounted in said spindle drum;
stationary frame means for supportably mounting said spindle drum;
means for indexing said spindle drum into a plurality of positions corresponding to the number of said work spindles;
each of said work spindles comprising the shaft of its associated electric motor;
stationary current supply means;
means for separately supplying electrically energizing currents from said supply means to each of said plurality of motors;
control means for control of currents to said current supply means;
said control means including rotary angular position indicator means and sensor means for developing electrical signals corresponding to the respective angular position of each of said work spindles to accurately control the respective angular position of each of said work spindles. - View Dependent Claims (11, 12)
- a plurality of work spindles rotatably mounted about the interior of said spindle drum; and
Specification