Precision positioning and clamping device of lathe

Abstract

The invention relates to a precision positioning and clamping device of a lathe, which comprises a clamp base, a clamp body, an elastic sleeve and a clamp nut, wherein the clamp body is connected and fixed with the clamp base by a screw, the clamp nut is fixed with the bolt of the clamp body and the upper end of the elastic sleeve is connected and fixed with the clamp nut, wherein a plurality of slits are evenly distributed at two ends of the elastic sleeve and the number thereof is the multiple of 3, and the distances between any two slits are equal; workpieces are arranged in the elastic sleeve and the axial direction is restricted by a positioning block; the external conical surface of the elastic sleeve and the corresponding conical surface of the clamp body are centered by taper fitting; and the clamp nut is rotated to generate an axial displacement by driving the elastic sleeve, thus changing the internal diameter of the sleeve and further tightly clamping the workpieces. The device can be configured with a certain number of elastic sleeves according to the demand of part family so as to lead the internal diameter to be changed, thus being applicable to parts with various sizes and avoiding the increase of repeated designing work of the technique and frock in the machining process, thereby further saving time and cost.

Description

technical field [0001] The invention relates to a lathe clamp, in particular to a lathe precision positioning clamping device. Background technique [0002] Group technology (GT) for short. It is a technology in which many parts and products with similar shapes, sizes, or process routes are grouped to increase production batches. With the rapid development of modern computer technology and numerical control technology, they are combined with group technology to form a flexible manufacturing system (FMS) and computer-aided process design (CAPP) based on it. [0003] The basic principle of group technology shows that the similarity of parts is the basic condition for realizing group technology. The similarity of the process allows the parts to be processed with the same process, mounted with similar fixtures, and measured with similar measuring instruments. [0004] Universal fixtures for CNC lathes include three-jaw chucks, four-jaw chucks, jaws and other internal and exte...

AI Technical Summary

Problems solved by technology

Due to reasons such as insufficient consideration of the technological design of various mechanical parts in the design process, the external dimensions are ever-changing and have no specific rules, resulting in an increase in the repetitive design of the process and tooling during the machining process of the parts, resulting in waste of time and resources. cost increase

[0005] Fixtures with similar principles are also often used for clamping small tools or workpieces on machining centers, but due to their structural limitations, they are not suitable for clamping parts with a diameter of 20mm or more

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