Rotary clamp for lathe

Abstract

The invention discloses a rotary clamp for a lathe, which comprises an intermediate disk, a connecting disk, a rotating plate, a pressing plate I, a stop block I, a positioning plate I, a positioning plate II, a connecting shaft, a positioning block, a pressing plate II, a stop block II and a mother board, wherein the intermediate disk is fixedly connected with the connecting disk which is fixedly arranged on a lathe main shaft; the rotating plate is arranged at a notch of the mother board and is connected onto the intermediate disk; a large end of the connecting shaft is arranged in an intermediate disk hole; a small end of the connecting shaft is connected with the rotating plate; the mother board is reversely and fixedly connected onto the intermediate disk; the stop block I, the positioning plate I, the positioning plate II, the positioning block and the pressing plate II are fixedly arranged on the rotating plate; and the stop block I and the pressing plate II are fixedly arranged on the mother board. The rotary clamp for the lathe which is disclosed by the invention has the advantages of compact and simple structure, convenience in disassembly and assembly, consistent positioning datum and precision and convenience in batch production; workpieces having two eccentric holes and high size precision between the holes can be ensured to be processed by one-step clamping; the centrifugal force influence caused by processing the centric holes is eliminated; the integral size dimension of the workpieces is improved; and the work efficiency is improved.

Description

technical field [0001] The invention relates to a clamp for a rotary lathe. Background technique [0002] Now in general production and processing, the processing of multiple stepped coaxial holes with unequal diameters is mainly processed by two processing methods: machining center and boring. Boring processing is slow and inefficient, and the processing cost of machining centers is high, which affects economic benefits; for this reason, most of the processing is changed to turning processing. Since the clamping method of the lathe (three-jaw, four-jaw) cannot meet the clamping of workpieces with irregular shapes, fixtures are often used. Under the premise of ensuring that the processing can be carried out smoothly, the existing fixtures mainly clamp the workpiece in two ways: repeated disassembly and clamping and axial displacement of the fixture. The advantage of repeated disassembly and clamping is that the dimensional accuracy of each stepped coaxial unequal diameter ...

AI Technical Summary

Problems solved by technology

The advantage of repeated disassembly and clamping is that the dimensional accuracy of each stepped coaxial unequal diameter hole is high. The disadvantage is that the repeated disassembly and clamping makes the positioning reference and accuracy inconsistent, the dimensional accuracy between the holes is low, and the size gap between the holes is large. The overall quality of the workpiece is reduced; the advantage of the axial displacement of the tooling is one-time clamping, the positioning reference, and the accuracy are consistent. The disadvantage is that the center of gravity of the workpiece after displacement is far away from the center of rotation of the spindle. To prevent excessive centrifugal force during processing, the machine speed needs to be reduced. , affects the surface roughness of processing, and also reduces work efficiency, which brings inconvenience to mass automated production

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