Oscillating table

Abstract

The present invention provides an oscillating table in which the oscillation drive, comprising a hydraulic actuator, transmits the oscillating motion to the mould via a spring subject to bending stress, for example a fitted rod. The body of the hydraulic actuator is also anchored to the floor by means of a fitted spring subjected to bending stress. Thus thanks to the absence of any mechanical bearings in the drive mechanism, all disadvantageous movements caused as a result of bearing play, which increases at high oscillation frequencies, are eliminated. Moreover, the use of mould guide elements having a much simpler design and consisting of straightforward bars, also ensures greater guidance precision and enables a reduction in the oscillation marks on the cast product, a reduction that is even more noticeable when working at higher oscillation frequencies. Advantageously, the presence of an anti-roll device, consisting of two or more pairs of bars, for example two pairs, ensures good torsional rigidity of the table.

Description

technical field [0001] The present invention relates to an oscillating table, in particular to a table used, for example, in a steel ingot and billet production plant, for effecting oscillation of a mold. Background technique [0002] Conventional shaking tables are described in various patent documents. One such document, US Pat. No. 4,456,052, describes an apparatus for continuous casting in which the casting mold mounted in a suitable mounting configuration is oscillated by means of an oscillating lever. One end of these levers is hinged to the model mounting arrangement and the other end is hinged to the support block. The presence of bearings and other mechanical parts subject to wear means that the use of such devices is inconvenient as they require extensive maintenance, expensive both in terms of money and time. Furthermore, during the production process, some unfavorable movement of the oscillation table occurs due to bearing play, which increases at higher oscill...

AI Technical Summary

Problems solved by technology

Said device is therefore undoubtedly more compact than those previously described, but still has several disadvantages: the use of leaf springs does not allow for high precision guidance or to reduce vibration marks on the casting; the oscillatory table has a weaker torsional stiffness; Its operation requires the use of mechanical bearings with the aforementioned disadvantages; finally, it is not easy to increase the oscillation frequency

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