Scribing saw blade spindle structure

Abstract

The invention discloses a dicing saw blade spindle structure which comprises a shell, a rotating shaft and an exhaust extrusion device, and the rotating shaft is rotationally connected into the shell and can move front and back in the axial direction of the rotating shaft. And an angular contact ball bearing sleeved outside the rotating shaft is arranged at the front end of the shell. The exhaust extrusion device comprises a front shell fixed to the front end of the shell, one end of the rotating shaft extends out of the front shell, a protruding ring is arranged on the portion, located in the front shell, of the rotating shaft in the circumferential direction, and an air pressure cavity is reserved between the front end of the protruding ring and the front wall of the front shell and communicated with an air inlet hole in the shell through an air inlet channel in the front shell. The protruding ring is pushed by gas pressure in the gas pressure cavity to move so as to press the angular contact ball bearing, and gas in the gas pressure cavity can overflow out of the front shell from a first gap between the rotating shaft and the front shell and a second gap between the protruding ring and the front shell. While the cost is low, the sealing performance is high, and the stability and the precision of the rotating shaft are greatly improved.

Description

technical field [0001] The invention relates to the technical field of dicing machine accessories, in particular to the structure of a main shaft of a dicing machine blade. Background technique [0002] The main functions of the dicing machine include alignment and cutting. The purpose of alignment is to find the position where the cutting is required, that is, the position where the blade cuts. The purpose of dicing is to separate the chip into individual particles along the aligned locations. Cutting is the key part of the dicing machine. The blade is fixed on the main shaft structure and driven by the main shaft structure to complete the cutting function. In order to adapt to the cutting environment of the chip, the spindle structure usually adopts an air-floating electric spindle, which floats the rotating shaft through the air bearing to ensure the accuracy, and at the same time, the gas in the spindle structure can be sprayed outward at all times to prevent external h...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of high cost of the air-floating electric spindle and the poor sealing performance and low precision of the ordinary electric spindle in the prior art, the purpose of the present invention is to provide a blade spindle structure of a dicing machine, which is low in cost and high in sealing performance. The stability and precision of the model have been greatly improved

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