A cold-drawing precision positioning die for a threaded inner cavity pipe

By designing a buffer assembly and a drafting assembly for a precision positioning die in cold drawing of threaded inner tubes, the problem of die impact force during cold drawing was solved, achieving stable die positioning and equipment protection, and improving processing accuracy and equipment life.

CN224423841UActive Publication Date: 2026-06-30HUBEI JIA HENG IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUBEI JIA HENG IND CO LTD
Filing Date
2025-06-11
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In the existing technology, during the cold drawing process of threaded inner tubes, the friction and drawing force between the die and the tube cause the impact force to act directly on the die holder and equipment. Long-term accumulation may lead to increased die wear, die holder deformation, or even equipment damage.

Method used

A precision positioning mold for cold drawing of threaded inner tubes was designed, comprising a buffer assembly and a drawing assembly. The buffer assembly buffers the impact force during the drawing process through a combination of a force transmission rod, a connecting rod, a gear, and a rotating roller. The drawing assembly realizes thread processing through a telescopic rod driven by a motor and the rotation and lifting of the inner mold.

Benefits of technology

It effectively buffers the impact force during the mold release process, prevents mold shaking and displacement, ensures mold positioning accuracy, and extends the service life of molds and equipment.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224423841U_ABST
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Abstract

The utility model discloses a cold-drawing accurate positioning die of screw inner cavity pipe relates to mechanical manufacturing technical field, and it is characterized by including base, still include: die assembly, is provided with outer mould in the die holder, and the steel pipe is located in the outer mould, and is provided with the inner mould in the steel pipe, is provided with the thread section on the inner mould, and the buffer assembly is rotated and is connected with the connecting rod on the force transmission rod, and the first support is arranged on the side of base top near connecting rod, and the fixed shaft is rotatively connected with the side of base top near first support, and the gear is arranged on the fixed shaft, and the rotating roller is arranged on the top of gear, and the convex ball is arranged on the rotating roller, and the rack is arranged on the side of base top near gear, and the rack is engaged with the gear, and the sleeve is arranged on the side of first support near rotating roller, can play the effect of stabilizing the die through the setting buffer assembly, prevents the die from producing displacement or vibration because of impact force, thereby guarantees the positioning accuracy of die in the die drawing process.
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