A high-precision full-contact surface chuck

Abstract

The invention discloses a high-precision full-contact surface chuck, which includes a spindle box, a chuck assembly, a pull nail and a hydraulic device. The spindle box is provided with a hollow main shaft, and one end of the main shaft is connected with a chuck assembly. Plate, middle plate, outer plate, extension spring and spring collet, connecting plate, end plate, middle plate and outer plate are ring-shaped and connected in sequence, the extension spring is set between the end plate and the middle plate, and one end of the extension spring is connected with the pull nail , the pull nail passes through the main shaft and is connected with the hydraulic device, the collet is set inside the outer disc, the tail of the collet is engaged with the extension spring, and the clamping part of the collet is hexagonal. In the present invention, a tension spring and a collet are arranged in the chuck assembly, and the fast replacement of workpieces of different sizes is realized through the engagement of the tension spring and the collet. At the same time, a hexagonal collet is provided to improve the The contact area with the workpiece, so that the spring collet can adapt to the high-speed cutting state and improve the cutting accuracy.

Description

technical field [0001] The invention relates to the field of lathe fixtures, in particular to a high-precision chuck with full contact surfaces. Background technique [0002] A lathe is a kind of mechanical equipment used for processing shaft workpieces. The process of use is to clamp the workpiece on the chuck, use the spindle of the lathe to rotate the workpiece along the axis at high speed, and use the tool on the lathe to process the workpiece. At present, it is difficult for the fixture of the lathe to realize the turning of the workpiece at a high spindle speed, resulting in a longer construction period and lower production efficiency. The cutting accuracy increases the processing risk, and the contact area between the existing fixture and the workpiece is limited, and lacks good concentricity, which easily causes the workpiece to need to be reworked. In addition, when producing workpieces with different diameters, parts cannot be replaced quickly, resulting in increa...

AI Technical Summary

Problems solved by technology

At present, it is difficult for the fixture of the lathe to realize the turning of the workpiece at a high spindle speed, resulting in a longer construction period and lower production efficiency. Cutting accuracy and increase the processing risk, and the contact area between the existing fixture and the workpiece is limited, lack of good concentricity, it is easy to cause the workpiece to be reworked

In addition, when producing workpieces with different diameters, it is impossible to quickly replace parts, resulting in increased time for each process

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