Gantry platform

Abstract

The invention relates to the field of machining equipment, and particularly relates to a gantry platform. The gantry platform comprises a base, a cross beam shaft, a first driving mechanism, a seconddriving mechanism and a displacement compensation mechanism, wherein the two driving mechanisms are provided with a first bearing plate and a second bearing plate correspondingly, and the two drivingmechanisms are arranged on the two sides of the base correspondingly; the two ends of the cross beam shaft are connected with the two bearing plates correspondingly; the two driving mechanisms are used for driving the cross beam shaft to do reciprocating motion; and the displacement compensation mechanism is arranged between the first bearing plate and the cross beam shaft so that the cross beam shaft can move in the length direction of the cross beam shaft. The displacement compensation mechanism is arranged between the cross beam shaft and the first driving mechanism so that the cross beam shaft can move in the length direction of the cross beam shaft when the cross beam shaft is subjected to thermal elongation or cold shrinkage, the increased or decreased length of the cross beam shaftis compensated, the internal stress accumulated when the cross beam shaft is subjected to thermal expansion or cold shrinkage is eliminated, the problem that the parallelism of the driving mechanismsconnected with the cross beam shaft becomes poor is effectively solved, and the machining precision of the gantry platform is guaranteed.

Description

technical field [0001] The invention relates to the field of processing equipment, in particular to a gantry platform. Background technique [0002] It is known that thermal expansion or cold contraction of a metal part will cause its size to change, and in a long metal part, the dimensional change in the length direction will be more obvious. [0003] In some production scenarios, machining and cutting of large or oversized parts is required. Taking the ultra-large display panel as an example, a large-span gantry platform is required to process such a display panel, and both ends of the beam axis of the existing long-span gantry platform are rigidly connected to the drive mechanism. When the beam shaft expands or contracts with heat, due to the longer length of the beam shaft, the size of the elongation or shortening in the length direction changes greatly, resulting in the accumulation of internal stress in the beam shaft, which will produce a more obvious outward thrust ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a gantry platform for the above-mentioned defects of the prior art, aiming to solve the problem that the thermal expansion or cold contraction of the beam axis of the existing gantry platform will affect the parallelism of its drive mechanism, resulting in the processing of the gantry platform The problem of reduced precision

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