Configurable welding table and force indicating clamp
View Patent ↗Disclosed is a configurable table that uses configurable mounting pieces to mount a work piece on the configurable table at a predetermined location. The configurable table includes a fixed portion of a mounting clamp that can engage a rotatable portion of a mounting clamp on a positioner or other device. The positioner can then rotate the configurable table and work piece to various orientations for performing horizontal welds, using robotic welders, as well as machining and cutting. The configurable table can also be used for initial fabrication, cutting, or working, which eliminates the need for separate fabrication and finish welding tables.
1. A clamp for securing a work piece to a configurable table by generating a desired clamping force that is sufficient to immovably hold said work piece to said configurable table when said configurable table is moved to various orientations in three dimensional space comprising:
a base that secures said clamp to said configurable table, said configurable table having a mounting surface to which said base is mounted in a selected location, said configurable table capable of moving said work piece to said various orientations;
a deflection piston mounted on said base, said deflection piston disposed to move transversely to said mounting surface of said configurable table;
a deflection plate that engages said deflection piston, said deflection plate disposed to move in a direction that is transverse to said mounting surface of said configurable table when said deflection plate is deflected, which causes said deflection piston to move transversely to said mounting surface;
spring washers disposed under a lower surface of said deflection piston so that deflection of said deflection plate causes said spring washers to compress, said spring washers selected to compress proportionally in response to forces in a range of forces applied to said deflection plate that includes said desired clamping force;
a deflection gauge disposed under a lower surface of said deflection plate that indicates an amount of deflection of said deflection plate and an amount of compression of said spring washers which is proportional to said desired clamping force, since said spring washers compress proportionally in response to forces in said range of forces that include said desired clamping force;
a clamping plate mounted on said base that provides a surface for mounting said work piece to said base;
a shaft secured to said base between said deflection plate and said clamping plate that extends transversely from said base;
a fulcrum disposed on said shaft, said fulcrum being adjustable on said shaft;
a clamping lever having a clamping portion and a deflection portion, said clamping lever constructed to have an opening between said clamping portion and said deflection portion, said clamping lever disposed so that said shaft extends through said opening in said clamping lever and said fulcrum engages said clamping lever, said deflection portion aligned with said deflection plate and said clamping portion aligned with said work piece so that adjustment of said fulcrum on said shaft towards said base creates a tightening force on said clamping lever, which creates said desired clamping force on said clamping portion that immovably clamps said work piece to said clamping plate and simultaneously generates a deflection force, that is proportional to said desired clamping force, said deflection force being in said range of forces that causes said deflection plate and said deflection piston to deflect by compressing said spring washers proportionally to said deflection force, so that said deflection gauge indicates said desired clamping force.
2. The clamp of claim 1 further comprising:
a spring disposed around said shaft that engages said base and said clamping lever, said spring having a force that is capable of supporting said clamping lever above said base and allow said clamping lever to be rotated on said shaft so that said work piece can be easily placed in said clamp.
3. The clamp of claim 2 further comprising:
a nut that is threaded onto said shaft that is rotated to create said tightening force on said clamping lever.