公开(公告)号：US3542996A

公开(公告)日：1970-11-24

申请号：US3542996D

申请日：1969-04-09

Applicant: SMITH CORP A O

Inventor： BOLLINGER JOHN G ,  HARRISON HOWARD L ,  STANKEY MICHAEL A

IPC: B23K9/12

CPC classification number: B23K9/12 ,  Y10T409/303528

公开(公告)号：US3624343A

公开(公告)日：1971-11-30

申请号：US3624343D

申请日：1970-01-26

Applicant: SMITH CORP A O

Inventor： STJERNSTROM ERIK ,  BOLLINGER JOHN G

IPC: B23K9/02 ,  B23Q35/14 ,  G06M1/26 ,  B23K9/12

CPC classification number: B23K9/02 ,  B23Q35/14 ,  G06M1/26

Abstract: A welding electrode is positioned with a specific relationship to a horizontal plane at a constant resultant velocity. An X-axis drive motor and a Z-axis drive motor are connected to drive the electrode in mutually perpendicular directions. An angle drive motor angularly orients the electrode to the horizontal plane. A Z-axis tachometer provides a velocity signal as the input signal to an absolute function value generator, the output of which is applied to a quarter-circle signal generator. The latter includes an operational amplifier having a feedback circuit with a plurality of parallel paths each including a diode and a slope controlling resistor to successively vary the slope to produce a circle function output. This provides the proper input to the Xaxis drive. A Z-axis position transducer controls the Z-axis drive and also provides a stablilizing control input to the Xaxis drive and the angle drive.

公开(公告)号：US3530273A

公开(公告)日：1970-09-22

申请号：US3530273D

申请日：1969-01-24

Applicant: SMITH CORP A O

Inventor： BOLLINGER JOHN G ,  HARRISON HOWARD L ,  BERGLUND BJORN

IPC: B23K5/06 ,  B23K9/12

CPC classification number: B23K5/06 ,  Y10T409/303528

公开(公告)号：US3568029A

公开(公告)日：1971-03-02

申请号：US3568029D

申请日：1969-01-24

Applicant: SMITH CORP A O

Inventor： BOLLINGER JOHN G

IPC: B23Q35/14 ,  G05B19/36

CPC classification number: B23Q35/14

Abstract: This disclosure includes a pair of drive motors energized to move a weld head along two related perpendicular axes in a horizontal plane. The one motor is a variable speed motor. A closed servoloop includes a reference input to establish a constant velocity drive along the related axis for the variable speed motor. A separate cam and follower positions a potentiometer to generate a signal proportional to the velocity correction at each point on the path for lateral movement with respect to the one axis. The signal is combined with the reference input in the servo to establish a modified drive signal. This maintains the resultant horizontal velocity vector constant.