Crossbeam clamping mechanism used for heavy-duty crossbeam-elevating gantry machine tool

Abstract

The invention relates to the technical field of gantry machine tools and discloses a crossbeam clamping mechanism used for a heavy-duty crossbeam-elevating gantry machine tool. The crossbeam clampingmechanism comprises a clamping guide rail part fixedly arranged on a machine tool column, a clamping guide rail groove parallel to a column guide rail and a clamping part fixedly connected with a machine tool crossbeam. The clamping part comprises a driving structure, a driving rod, a wedge-shaped pressing block and wedge-shaped pressing boards. Two sides of the wedge-shaped pressing block are equipped with pressing block slopes. The wedge-shaped pressing boards have pressing board slopes. The pressing block slopes and the pressing board slopes gradually tilt from the back to the front towardsthe axial direction of the driving rod. When the driving rod moves forwards, the wedge-shaped pressing block at the front end is pushed to move forward. The pressing block slopes correspond to and push against the pressing board slopes. The wedge-shaped pressing boards on two sides expand towards the left-right direction and push and clamp tightly against two side surfaces of the guide rail groove. Therefore, the clamping mechanism does not directly contact a crossbeam guide rail and the column guide rail. Damage and deformation to the crossbeam guide rail and the column guide rail due to long-term frequent clamping operation are avoided. Therefore, clamping positioning precision of subsequent crossbeams on the column is ensured.

Description

technical field [0001] The invention relates to the technical field of gantry machine tools, in particular to a beam clamping mechanism for a heavy-duty beam lifting gantry machine tool. Background technique [0002] Heavy-duty gantry machine tools have a wide range of applications, strong processing capabilities, and a high degree of automation. They are general-purpose equipment necessary for modern large-scale and heavy-duty parts processing. In order to adapt to large-sized parts, the size and weight of heavy-duty gantry machine tools are huge, especially the vertically lifting beam and its attached parts can exceed 10 meters in length and weigh more than 50 tons. It is necessary to fix such a long and heavy beam in the vertical direction. , it will cause excessive deformation of the beam and column due to too much clamping force required, which is not conducive to ensuring that the beam under processing has good rigidity, stability and vibration resistance. Therefore, i...

AI Technical Summary

Problems solved by technology

However, this structure has a relatively large disadvantage: the clamping device is realized by the pressing force between the sliding guide rail surface of the machine tool beam and the column guide rail. The heavier the beam, the greater the pressing force required, and the greater the deformation of the beam and column. Deformation will affect the accuracy of repeat positioning of the machine tool. At the same time, it is inconvenient to maintain the sliding guide rail surface of the deformed beam and the column guide rail, which reduces its service life. It is also uneconomical to replace the deformed structure as a whole, which increases the equipment investment. Cost; especially for heavy-duty gantry machine tools with a beam weight of more than 50 tons, due to the huge pressing force, the pressing force acting on the beam and the guide rail surface of the column will cause a large compression deformation of the relatively weak beam, which is easier Affect the repeated positioning accuracy of the machine tool

Therefore, the above two commonly used beam compression structures are not suitable for the beam clamping requirements of heavy-duty beam lifting gantry machine tools

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