Patent ID: 8534652
Filing Date: 2013-09-17
Classification: B23Q

Abstract:
1. A positioning machine for positioning a workpiece, comprising: a base defining a recessed portion on its top surface, two opposite sidewalls of the recessed portion respectively defining a pair of first tracks; a support portion mounted on the base for supporting the workpiece, defining a groove with two opposite opening at lengthwise ends thereof, wherein two sidewalls of the groove respectively define a pair of second tracks; and a first positioning mechanism received in the recessed portion, comprising: a second positioning mechanism received in the groove, comprising: a third positioning mechanism fixed on the base, comprising: a light barrier movably connected to the third motor; a moving portion mounted over the third nut; a photoelectric switch fixed on the moving portion and below the light barrier; and a probe needle perpendicularly mounted on one end of the moving portion away from the photoelectric switch; wherein the third coupler is forced by the third motor to drive the third screw rod to rotate, the third nut is driven by the third screw rod to move along the third screw rod, the moving portion and the photoelectric switch are driven by the third nut to move along the third screw rod, during movement of the photoelectric switch, the photoelectric switch generates a high level signal to the third motor when light from the photoelectric switch is not blocked by the light barrier, the third motor drives the moving portion to continually move towards the workpiece according to the high level signal until the workpiece is pressed by the probe needle in a predetermined pressure, then, the light barrier is adjusted until the light from the photoelectric switch is not blocked by the light barrier, the photoelectric switch generates a low level signal to the third motor, the third motor stops to work according to the low level signal, thereby causing the third nut to be fixed in a predetermined position within the third screw rod, and the workpiece to be pressed by the probe needle in the predetermined pressure.