An automatic fixture that can be lifted and rotated for precision parts processing

Abstract

The invention relates to the technical field of fixtures for precision part processing, in particular to an automatic fixture capable of lifting and rotating for precision part processing. According to the automatic fixture, a hydraulic support mechanism is arranged on a precision screw drive lifting mechanism, upward support force is provided for a lifting platform through the hydraulic support mechanism, in this way, driving force of a thread of the precision screw drive lifting mechanism can be effectively reduced, the damage to the thread is reduced, the accuracy of thread drive is effectively ensured, and the problem of low accuracy only using a hydraulic cylinder to lift is solved; and the support force of the hydraulic support mechanism is less than gravity of a heavy workpiece, thestroke can be effectively controlled by the precision screw drive lifting mechanism, a control mechanism enables the hydraulic support mechanism to follow the precision screw drive lifting mechanismto move, thus the precision screw drive lifting mechanism controls the driving quantity of lifting to make the support force of the hydraulic support mechanism to the lifting platform remain unchangedas far as possible, and the lifting accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of clamps for precision parts processing, in particular to an automatic clamp for precision parts processing that can be lifted and rotated. Background technique [0002] At present, when processing large-scale workpieces, especially heavy-duty workpieces, they are generally fixed on the rotary table by using machine fixtures. , At present, for this kind of fixture, the bearing is generally used to support the rotation, and the movement of the nut screw is used to realize the lifting of the table. In this way, for heavy workpieces, only relying on the bearing for rotational support, it is easy Abrasion occurs, resulting in a decrease in the accuracy of rotation. When lifting, the gravity of the workpiece is completely supported by the nut screw, which leads to faster damage to the nut screw. With use, the pitch of the screw becomes larger, which leads to After lifting and lowering, the errors in tool settin...

AI Technical Summary

Problems solved by technology

[0002] At present, when processing large-scale workpieces, especially heavy-duty workpieces, they are generally fixed on the rotary table by using machine fixtures. , At present, for this kind of fixture, the bearing is generally used to support the rotation, and the movement of the nut screw is used to realize the lifting of the table. In this way, for heavy workpieces, only relying on the bearing for rotational support, it is easy Abrasion occurs, resulting in a decrease in the accuracy of rotation. When lifting, the gravity of the workpiece is completely supported by the nut screw, which leads to faster damage to the nut screw. With use, the pitch of the screw becomes larger, which leads to After lifting and lowering, the error of tool setting and other problems will increase, which will greatly reduce the subsequent machining accuracy and affect the machining accuracy.

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