4results about How to "Avoid clamping deformation" patented technology

This utility model discloses a machining fixture for the main boom of an aerial work platform, comprising: a machine tool worktable and an end positioning and clamping device, a rotary clamping device, and a tail-side pushing and clamping device mounted on the machine tool worktable. The end positioning and clamping device, the rotary clamping device, and the tail-side pushing and clamping device are arranged sequentially at the front, middle, and rear of the machine tool worktable, and the three can automatically and collaboratively clamp the main boom of the aerial work platform. This application achieves automatic positioning and multi-point collaborative clamping of the main boom workpiece, eliminating positioning errors caused by manual operation. The hydraulic drive system ensures synchronous operation of each clamping device, shortening the clamping preparation time. The adaptive adjustment mechanism is compatible with workpieces of different specifications, reducing the number of tooling changes. The composite clamping method disperses contact stress, preventing clamping deformation of thin-walled structural parts. The multi-directional constraint mechanism effectively suppresses machining vibration and improves the positional accuracy of hole machining.

The utility model discloses a milling machine fixture, which comprises a base, a plurality of groups of fixed seats and a plurality of groups of support rod seats, the fixed seats and the support rod seats are arranged on the base, the plurality of groups of fixed seats are circularly distributed along the surface of the base, and the plurality of groups of support rod seats are arranged along the surface of the base. The multiple sets of supporting rod bases are circularly distributed along the surface of the base, pressing nuts and pressing blocks are arranged on the supporting rod bases, the pressing blocks are arranged at the upper ends of the supporting rod bases, and the pressing nuts are arranged at the upper ends of the supporting rod bases and located above the pressing blocks. And therefore, the workpiece on the fixed seat is pressed and fixed. The fixing base and the supporting rod base are circularly distributed to form a double-ring-shaped supporting structure, the clamp is more uniform in stress through the layout, the supporting rod base is integrated with the pressing nut and the pressing block, single-hand rapid pressing is achieved through thread transmission, and compared with a traditional manual clamping device, the operation time is greatly shortened.

This invention discloses a centering device structure with a pipe-holding function, including a pipe-holding centering device base mounted on a drilling rig. Two left-right swing brackets are symmetrically hinged on the pipe-holding centering device, and two left-right swing supports are hinged opposite each other at their middle portions. Two outer clamping plates are oppositely mounted on the two left-right swing supports. During drilling operations, two internal drilling chucks are oppositely mounted on the two external clamping plates, and a drilling connection frame is located between the ends of the two left-right swing brackets away from the pipe-holding centering device base. When the drilling rig needs to perform casing installation, two internal pipe-holding clamping plates are oppositely mounted on the two external clamping plates, and a pipe-holding cylinder is located between the ends of the two left-right swing brackets away from the pipe-holding centering device base. This invention allows for convenient and timely changes in construction methods according to construction needs, achieving the effects of convenience, speed, improved production efficiency, and reduced labor intensity.

The invention relates to the technical field of metal cutting, and provides a variable-speed linear cutting machine tool for metal bracket machining, which comprises a worktable and a rack mounted at the top of the worktable, a displacement mechanism is arranged on one side of the machine frame, a limiting structure is installed on the top of the displacement mechanism, a support is installed on the other side of the machine frame, a speed changing structure is arranged at one end of the support, and a wire releasing barrel is installed on the top of the support. By arranging the speed changing structure, when the effective length of an electrode wire is transiently fluctuated due to the change of the wire moving speed, the floating wheel generates displacement under the action of the spring, and resistance is generated on one of the wire releasing barrel and the wire collecting barrel through transmission of the driving rack, the transmission gear set and the conical fluted disc, so that the power of the planet wheel automatically deviates to the side with smaller resistance, and the wire feeding speed is increased. Instantaneous mechanical compensation of the wire releasing speed or the wire collecting speed is achieved, looseness or excessive tensioning of the electrode wire is effectively avoided, the precision of the machined surface is remarkably improved, the roughness is remarkably reduced, and the wire breaking risk is greatly reduced.