Method for manufacturing over-long precise mortise joint rack

Abstract

The invention provides an over-long precise mortise joint rack for a mechanical drive mechanism and a method for manufacturing the same. The rack consists of a plurality of mortise joint rack sections with same structures, the structure of each mortise joint rack section comprises a strip body, rack rows, a retaining screw hole, a positioning pin hole, a rack end part, a mortise and a tenon, wherein the mortise and the tenon positioned at two ends of the strip body respectively form a nested mortise joint structure when two adjacent rack sections are connected; and the structure can guaranteehigher rack pitch precision at the joint of adjacent rack sections, has better load-bearing capacity, and can simplify the assembly work of the racks and a support member. The invention also providesthe method for manufacturing the over-long precise mortise joint rack, which adopts a digital control electric spark linear cutting processing technique to perform one-step assembling, clamping, positioning and processing on an important surface of the mortise joint rack.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing transmission, in particular to an ultra-long precision tenon joint rack and a manufacturing method thereof. Background technique [0002] The rack is a mechanical transmission part. Its basic shape is a strip body, and its cross-sectional shape is mostly rectangular, circular, or polygonal. One or more sides of the length direction of the bar-shaped body are distributed with tooth rows that conform to the meshing law. The rack and the gear are correctly meshed to form a transmission pair. This transmission pair can realize the relationship between rotary motion and linear motion or between linear motion and rotary motion motion conversion. The structure of the rack is: a bar body, a tooth row, a fixing screw hole, a positioning pin hole, and an end. The material of the rack is: metal material, powder metallurgy, engineering plastics. The manufacturing process of traditional metal racks...

AI Technical Summary

Problems solved by technology

In addition, because the end of the traditional rack is flat and does not have a connection function, the positional relationship between adjacent racks is guaranteed by positioning and fixing the racks on the support with positioning pins and fixing screws. This traditional method exists The main disadvantages are that the tooth pitch deviation and load capacity of the connecting parts are not easy to guarantee, and the assembly is inconvenient, which leads to the inability to realize the precision transmission of the ultra-long-distance rack drive.

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