Fast high-precision locating unit

Abstract

The invention discloses a fast high-precision locating unit. The fast high-precision locating unit comprises a central spindle, a protecting jacket, a pan head screw and a plurality of steel balls with the same diameter. A step is arranged in the middle of the central spindle and divides the central spindle into an upper locating section and a lower locating section. The step is provided with a countersunk head screw hole. The inner surface of the protecting jacket is provided with an annular groove in the circumferential direction. The width D3 of the annular groove is slightly greater than the diameter D1 of each steel ball. A plurality of through holes are formed in the bottom of the annular groove. The diameter D4 of each through hole is slightly smaller than the diameter D1 of the corresponding steel ball. The upper locating section of the central spindle is sleeved with the protecting jacket. The steel balls are arranged in the space formed by the central spindle and the annular groove. The steel balls are in one-to-one correspondence with the through holes. Besides, part of each steel ball is exposed out of the protecting jacket from the corresponding through hole. The fast high-precision locating unit is low in cost and can be used for fast and precise locating.

Description

technical field [0001] The invention belongs to an automobile fixture, in particular to a fast and high-precision positioning unit. Background technique [0002] In the high-speed production line of the machinery manufacturing industry, there are often high-precision position requirements between the hole systems of shells and box-type workpieces. In mass production, the processing and testing of these hole systems requires fast Be precise. [0003] First of all, to meet the precise positional relationship of each hole system of these workpieces during processing, the conventional method is to complete the one-time positioning and clamping process. For those hole systems that are not on the same plane, you can only rely on paying a high price to buy precision High-quality four-axis or even five-axis machining centers can meet the accuracy requirements. [0004] Secondly, since conventional inspection aids cannot be accurately positioned, it takes a lot of time to re-establ...

AI Technical Summary

Problems solved by technology

[0003] First of all, to meet the precise positional relationship of each hole system of these workpieces during processing, the conventional method is to complete the one-time positioning and clamping process. For those hole systems that are not on the same plane, you can only rely on paying a high price to buy precision The four-axis or even five-axis machining center can meet the accuracy requirements

[0004] Secondly, since conventional inspection aids cannot be accurately positioned, it takes a lot of time to re-establish the benchmark for each workpiece inspection

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