Claims
- 1. In a machine tool having a frame;
- a tool operator and a work station carried by said frame for relative movement to perform a machining operation;
- a loading station positioned in a predetermined spaced relationship to said work station for supporting workpieces to be worked upon by said work station and to receive completed workpieces;
- a rotary transfer arm rotatably carried by said frame and connected to be rotated by power for transferring the workpieces between said work station and said loading station;
- a cam connected to move with said rotary transfer arm; and
- a rate change means actuated by said cam to regulate the rate of acceleration and deceleration of said transfer arm during the transfer movement so that the transfer operation will be completed in minimum time without excessively straining the associated structure.
- 2. A machine tool according to claim 1 including:
- a hydraulic motor connected to rotate said transfer arm in its transfer movement; and
- said rate change means comprises a hydraulic valve connected to control the flow of the pressure fluid that actuates said hydraulic motor and disposed to be actuated by said cam for regulating the rate of rotation of said transfer arm.
Parent Case Info
This application is a division of pending application Ser. No. 311,851, filed Dec. 4, 1972, now U.S. Pat. No. 4,013,176, which, in turn, is a continuation of application Ser. No. 12,057, filed Feb. 17, 1970 and subsequently abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
2864209 |
Balsiger |
Dec 1958 |
|
2877676 |
Swanson et al. |
Mar 1959 |
|
3550487 |
Randall et al. |
Dec 1970 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
311851 |
Dec 1972 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
12057 |
Feb 1970 |
|