Translation swallow-shaped cam core shaft type smart three-claw automatic centering fixture

Abstract

The invention discloses a translation swallow-shaped cam core shaft type smart three-claw automatic centering fixture. Through contact of supporting bearings of the rear portions of upper and lower levers and the outline of a translation swallow-shaped cam, clamping claw bearings at the front ends of the levers and a clamping claw at the front end of a core shaft of the swallow-shaped cam are controlled to keep the centering and same-radius position linkage relation all the time, and accordingly shaft-type parts with different radiuses are clamped in a centering mode. Contacting of all parts of the fixture are completed through the bearings. When working, the fixture is small in friction resistance, light in working load and light in action. An electromagnetic reversing valve automatically controls an air cylinder to make reciprocating motion to finally achieve clamping and loosening actions of the fixture. When bars are mounted and detached, the opening angle of the fixture is large, workpieces can be mounted and detached directly in the radial directions of the shaft-type parts, and the two fixture has the characteristics that the structure is compact, the automation degree is high, the cost is low, reliability is high and environmental pollution does not occur and is quite suitable for being popularized.

Description

technical field [0001] The invention relates to a profile of a translational Stefanie cam, through the movement transmission of the support points of the upper and lower levers, real-time control of the end jaws of the upper and lower levers and the jaws at the end of the Stefanie cam are always in the same position. The invention relates to an automatic centering fixture for clamping round shaft parts by centering on a circle with the same radius, which belongs to the field of machinery manufacturing and automation, and is applied to the precision machining of slender shaft parts. Background technique [0002] Slender shaft parts are the most commonly used parts in mechanical equipment, such as crankshafts of automobiles, synchronous shafts of textile machines, and printing machines. The biggest problem of slender shaft parts in turning and grinding is that there will be large bending deformation and self-excited vibration, which will cause the slender shaft to swing and ro...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the deformation problem of slender parts during processing, and propose a three-jaw concentric and same-diameter linkage fixture with a cavity, which drives the translational motion of Stefanie cam profile through the cylinder, and controls the movement of the upper and lower levers. The end jaws and the end jaws of the Stefanie cam keep synchronous centripetal movement, so as to realize the centering clamping of shaft parts in a large size range

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