Automatic centering central frame

Abstract

The automatically centering central frame consists of support, left large sector gear, left small sector gear, left pressure lever, right pressure lever, roller, upper rotary pin, right small sector gear, right large sector gear, link rod, sliding block, runner block, lower pressure lever slide rail, lower pressure lever and lower rotary pin. It is one opened structure and realizes three bearing point automatic centering by means of the block-link rod mechanism to drive the sector gear mechanism. The complete linkage of the three bearing points can center shaft work piece of different diameter reliably in the same rotary center. The present invention has the features of reliable design, simple structure, wide application range, etc and is especially suitable for automatic control of central frame by means of pneumatic, hydraulic or other modes.

Description

Technical field

[0001] The invention relates to a machine tool clamping aid, in particular to an automatic centering center frame. Background technique

[0002] In the field of machinery manufacturing, when turning or grinding slender shaft workpieces, a center frame is often used to support the workpiece to improve rigidity and ensure machining accuracy. The center frame generally adopts the principle of three-point fixed circle to support the slender shaft workpiece. The three supporting points of the existing machine tool center frame generally cannot be linked. For shaft workpieces of different diameters, the positions of the three points need to be manually adjusted to make the center of the circle determined by the three points located on the center of rotation of the machine tool, such as: Chinese utility model Patent: "Adjustable Center Frame" (ZL 200420027852.1), etc. This process often requires the use of dial gauges, needle dials and other measuring tools, relying on t...

Images