Rapid center drilling fixture

Abstract

The invention belongs to the technical field of centering devices for drilled holes and provides a rapid center drilling fixture. The center drilling fixture comprises a base which is divided into a base plate and a vertical plate; a vertical height adjusting groove is formed in the vertical plate; a positioning shaft capable of moving up and down is arranged in the height adjusting groove; the positioning shaft is locked with the height adjusting groove by use of a locking nut; an upper V-shaped block, a middle V-shaped block and a lower V-shaped block are coaxially arranged on the vertical plate; the height adjusting groove is located between the V angles of all the V-shaped blocks, wherein a pressing plate is hinged to the middle V-shaped block and matched with the V angle of the middle V-shaped block to form a workpiece clamping part. According to the rapid center drilling fixture, the pressing plate is turned to rapidly clamp and release shaft parts; the rapid center drilling fixture is greater than a triangular chuck in clamping force; besides, the clamping time of the shaft parts is shortened; the rapid center drilling fixture is suitable for center drilling of a batch of shaft parts.

Description

technical field [0001] The invention belongs to the technical field of centering devices for drilled holes. Background technique [0002] In the process of mechanical processing of shaft workpieces, it is generally necessary to drill center holes at both ends of the shaft in advance as the basis for processing. The existing drilling center holes generally require a special drilling center machine tool. This drilling center machine tool adopts The self-centering three-jaw chuck locates the shaft workpiece. Insert the wrench into the square hole of the small bevel gear of the three-jaw chuck to rotate the small bevel gear, and the small bevel gear drives the large bevel gear to rotate. The disadvantage of this clamping and positioning method is that the clamping force is small, and when the drill bit drills the center hole on the end face of the shaft workpiece, the shaft may slip back; in addition , The clamping time is long, it will take time to adjust the clamping force wi...

AI Technical Summary

Problems solved by technology

[0002] In the process of mechanical processing of shaft workpieces, it is generally necessary to drill center holes at both ends of the shaft in advance as the basis for processing. The existing drilling center holes generally require a special drilling center machine tool. This drilling center machine tool adopts The self-centering three-jaw chuck locates the shaft workpiece. Insert the wrench into the square hole of the small bevel gear of the three-jaw chuck to rotate the small bevel gear, and the small bevel gear drives the large bevel gear to rotate. The disadvantage of this clamping and positioning method is that the clamping force is small, and when the drill bit drills the center hole on the end face of the shaft workpiece, the shaft may slip back; in addition , the clamping time is long, it will take time to adjust the clamping force with a wrench, and it will take a lot of time to install and disassemble, it is not suitable for batch hole processing of shaft workpieces

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