Vacuum suction arm, collet holder, and nozzle collet

Abstract

Comprised are: a collet shaft 11 that forms a first cylinder having a vacuum suction hole 31 that is continuous from a collet insertion hole 35 upward, and that is provided with a guide hole piercingthrough to the vacuum suction hole 31 from the outer periphery of the first cylinder; a cylindrical ball pressing part 17 that has a sliding inner peripheral surface in contact with the collet shaft 11 and a tapered pressing inner peripheral surface expanding from this sliding inner peripheral surface; pressing balls 21a, 21b placed within the guide hole and pressing in the symmetrical direction from the pressing inner peripheral surface; and a nozzle collet 23 that forms a second cylinder for which the top part shape matches the inner diameter shape of the collet insertion hole 35, and that is provided with a ring shaped retention groove 41 on the outer peripheral surface of the second cylinder. When the nozzle collet 23 is inserted in the collet insertion hole 35, the pressing balls 21a,21b fitted in the retention groove 41 are pressed in a symmetrical direction to each other facing the retention groove 41.

Description

technical field [0001] The present invention relates to a vacuum suction arm used in a precision machining device for processing fine components such as electronic components, and a collet holder constituting the vacuum suction arm, and particularly relates to a nozzle collet suitable for high-speed automatic exchange of a nozzle inserted into the front end of the collet holder. System collet holder and nozzle collet. Background technique [0002] As a conventional vacuum suction type precision machining device having a nozzle head, a structure has been proposed in which the pressure of an annular elastic body provided on the nozzle head side is transmitted to a pin roller embedded in a hole of the nozzle head, and the pin roller It is fixed in a holding groove provided on the pipe side of the device main body (refer to Patent Document 1). A structure has also been proposed in which the pressing force of an elastic body provided on the tube side of the device main body is t...

AI Technical Summary

Problems solved by technology

[0005] However, in the invention described in Patent Document 3, since the force from the two asymmetrically arranged hard balls is applied in only one direction, vertical vibration occurs when the nozzle moves up and down at high speed during a dynamic operation such as replacing the nozzle. , the position of the nozzle is unstable when replacing the nozzle

Therefore, in the invention described in Patent Document 3, the longitudinal shaking has an adverse effect on the high-speed adsorption / desorption of the nozzle, and the accuracy of the adsorption / desorption of the nozzle during the high-speed vertical motion used in the high-precision high-speed automatic replacement system cannot be maintained at a high level.

Furthermore, in the arrangement of the asymmetrical two hard balls described in Patent Document 3, variations occur due to the wear of the nozzle, and therefore, in the case of high-speed up-and-down movement as in a high-precision high-speed automatic replacement system, the life of the nozzle will be reduced. become shorter and thus inappropriate

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