A horizontal machine tool for processing drill chuck jaw threads

Abstract

The invention relates to a horizontal machine for machining threads for jaws of drill chucks. The horizontal machine comprises a base, a milling jig rotary feeder and a tool rotary feeder. The milling jig rotary feeder comprises a guide rail and a longitudinal sliding table both arranged on the base; a milling jig driven by a motor is mounted on the longitudinal sliding table; the milling jig faces a milling tool on the tool rotary feeder; the milling jig is provided with a tapered slant having the same inclination angle as a slant of a drill taper; the tapered slant is axially provided with an oblique hole used for mounting a jaw; the center line of the oblique hole and the axis of the tapered slant form an included angle which is a lead angle of the milling jig. The horizontal machine is reasonable in structure and convenient to operate and use, the milling jig is long in service life, the parts machined are stable in size and good in uniformity, and the horizontal machine is applicable to threading of jaws for drill chucks.

Description

Technical field [0001] The invention relates to a horizontal machine tool, in particular to a horizontal machine tool for processing the threads of clamping jaws. Background technique [0002] At present, the processing equipment for the thread of one of the parts of the three-jaw drill chuck is on an ordinary lathe. The reducer is placed on the large pallet, the stepper motor drives the indexing of the reducer, and the three-hole milled wire tire is placed on the reducer. On the top, the horizontal feed uses a stepping motor to drive the lead screw, the lead screw drives the reciprocating movement of the large pallet, and the head of the bed is a rotating cutter. The three-hole milled wire tire adopts a mold made of three oblique holes that simulate the main body of the drill chuck to complete the processing of three gripper threads at one time. The indexing device of the three-hole milled tire uses a stepper motor to drive the reducer to rotate the index. The three-hole millin...

AI Technical Summary

Problems solved by technology

There are many unstable factors in the manufacturing and processing of three-hole milling tires. There are large fluctuations in the straightness and size, parallelism, symmetry, formation of circles, and 120-degree positioning blocks of the three oblique holes. The tire is very weak at the junction of the three inclined holes, the connection area is small, and heat treatment is not possible, resulting in insufficient strength; the thread lead angle is produced by the two-axis linkage between the feed of the machine tool's horizontal stepping motor and the rotation of the stepping motor of the indexing device, because the thread There is a gap in the rod, and the lead screw used in mass production will also wear out, and the thread lead angle will be unstable, which cannot meet the requirements of high-precision three-jaw drill chucks.

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