Equidistant arc surface and machining device

Abstract

The invention discloses an equidistant arc surface and a machining device. The center Oe of the equidistant arc surface R is designed to be outside an equidistant arc profile inscribed circle, namely,R is larger than d; centers O of small arcs r1 in the equidistant arc surface are designed to be on a center O of an equidistant large arc surface, namely, the plurality of small arcs are concentriccircles, and the radius r2 of a small arc in a hub hole is larger than the radius r1 of a small arc on an equidistant arc surface axis (r2 > r1). The equidistant arc surface with the high precision (h5-h6) and the high degree of finish (Ra0.8-0.4 micron) can be quickly produced through grinding by the machining device.

Description

technical field [0001] The invention relates to equidistant profiles connection, in particular to an equidistant arc surface and processing device. Background technique [0002] "Equidistant surface" means that the distance between any two parallel tangents on the surface is equal. Due to its simple structure, equidistant surface connection can transmit large torque, and it was applied in micro and small machinery such as clocks and printing as early as the 16th century. Due to the complex manufacturing process and low machining accuracy, it was later replaced by flat keys and splines. In the 1950s, scientists from the United States, Britain, Switzerland, Japan, the Soviet Union and other countries did a lot of research on the geometric characteristics and formation principles of equidistant profile connections. Austrian engineers Kolauz and Moxiliang successively proposed the geometric shape of the convex trilateral cycloid profile, designed the processing technology, and...

AI Technical Summary

Problems solved by technology

[0005] Existing problems: the equidistant profile shaft is connected to the hub, and three large arc surfaces are used for support, centering and positioning during work

[0007] Double "equidistant profile", making machining difficult

The large arc surface and the small arc surface become a double eccentric equidistant arc surface, and the 360° 0 The interior is designed as equidistant eccentric arc surfaces of two sizes, which cannot be processed continuously in one clamping

It is difficult to process a circular arc surface with a dimensional accuracy of h6-h7, and it is even more difficult to process a smooth arc surface below Ra1.6-0.8μm

[0008] In March 2009, Shenyang University of Technology, on the Mazak CNC "turning and milling machining center" machine tool imported from Japan, processed the "square axis of equidistant arc surface" and adopted the "orthogonal method" to turn and mill five equidistant arc surfaces Shaft (aluminum alloy test piece), using the "orthogonal turning and milling method" to process the arc surface, is actually a "multi-edge" arc surface enveloped by a broken line; and the equidistant arc radius (R or r) cannot be online Measurement, that is, the dimensional accuracy and profile distance accuracy of equidistant arc radius cannot be guaranteed

It can be seen from this that high-end CNC turning and milling machining centers at home and abroad can only process "samples" without precision requirements and rough surfaces, and cannot be installed on mechanical equipment for use.

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