High-precision six-jaw duplex floating type self-centering clamping mechanism and clamping method

Abstract

The invention relates to the technical field of clamp structures, in particular to a high-precision six-jaw duplex floating type self-centering clamping mechanism and a clamping method. The clamping mechanism comprises a clamp body and further comprises at least two sets of clamping jaws, and each set comprises at least three clamping jaws; an inclined mounting groove is formed in the clamp body; each clamping jaw comprises a diagonal draw bar, which is arranged in the mounting groove in a penetrating mode and can move in the length direction of the mounting groove, and a clamping jaw body, which is fixed to the end, extending out of the outer side of the clamp body, of the corresponding diagonal draw bar; plunger cylinders used for driving the diagonal draw bars to move along the mounting groove so as to tighten the clamping jaw bodies to clamp a workpiece are arranged in the clamp body; and the plunger cylinders are in one-to-one correspondence with the diagonal draw bars, the driving speeds of the corresponding plunger cylinders in the same set of clamping jaws are consistent, and the driving speeds of the plunger cylinders in different sets of clamping jaws are different. The clamp is simple in structure and convenient to operate, pre-clamping and pre-positioning of the workpiece are achieved by controlling the clamping speeds of different sets of clamping jaws, the clamping precision of the workpiece is improved, and the technical problem of turning thermal deformation is solved.

Description

technical field [0001] The invention relates to the technical field of clamp structures, in particular to a high-precision six-claw double-connected floating self-centering clamping mechanism and a clamping method. Background technique [0002] In the automobile braking system, the car brake disc is a precision part in the brake parts, and the dimensional accuracy is high, especially the thickness difference of the brake disc cap surface is usually only 5-6mm, and the clamping and turning processing are easy to produce Clamping and turning thermal deformation, the flatness of the wheel and hub mounting surface is required to be 0.02mm, and the runout is required to be 0.025mm. These high-precision shape and position tolerances are a major problem in brake disc processing. In order to meet the above size and shape tolerance requirements, this requires high-precision, high-strength, high-sensitivity positioning and processing methods to achieve. Various dimensions are processe...

AI Technical Summary

Problems solved by technology

[0003] Although there are a variety of positioning and clamping mechanisms used in turning finishing in the prior art, these clamping mechanisms generally adopt the traditional slider type or 3-6 jaw jaw type design, the parts have poor machining rigidity, and thin-walled parts It is prone to deformation, inaccurate positioning, poor tool change and tool setting accuracy, which increases the generation of work waste, causes great waste, and prolongs the labor time and labor intensity of processing workers

And the ordinary clamping mechanism has no pressure maintaining measures, so the safety is poor

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