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A Compensation Mechanism with Controllable Deflection and Expansion Radius of Crack Tip Passivation

A compensating mechanism and expanding radius technology, applied in storage devices, metal processing equipment, feeding devices, etc., can solve the problems that the loading force cannot effectively regulate the deflection of the blanking end of the pipe, and the change of the passivation radius of the crack tip is uncontrollable. Reduce friction and achieve the effect of controlled changes

Active Publication Date: 2021-11-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the combined action of the loading force and the compensation feedback force, the passivation radius of the crack tip can be controlled to change between the minimum passivation radius and the critical passivation radius with the feeding force during the entire crack propagation process, which solves the problem of metal pipe material During the whole process of material dynamic separation, there is often the problem that the applied load cannot effectively control the deflection of the lower material end of the pipe. The microcosmic manifestation is that the change of the passivation radius of the crack tip is uncontrollable. Instantaneous interruption due to sharp critical passivation radius

Method used

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  • A Compensation Mechanism with Controllable Deflection and Expansion Radius of Crack Tip Passivation
  • A Compensation Mechanism with Controllable Deflection and Expansion Radius of Crack Tip Passivation
  • A Compensation Mechanism with Controllable Deflection and Expansion Radius of Crack Tip Passivation

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1, the blanking machine includes a loading transmission shaft 1a, a turntable 2a, a blanking slider 3a, a blanking hammer 4a, a double slide rail 5a, a cutter slider 6a and a slotting knife 7a, and figure 1 It is a schematic diagram of the slotting and blanking of the pipe blanking machine in the prior art, as attached figure 1 shown. Fix one end of the pipe material in the clamping mechanism at the left end, and the other end is cantilevered under the slotting and unloading mechanism. The frequency conversion motor drives the loading transmission shaft 1a to rotate, and at this time, the turntable 2a matched with the loading transmission shaft 1a also follows it. The synchronous rotation makes the integrated linkage device for pipe material slotting and unloading fixed on the turntable 2a rotate synchronously. When slotting, the thrust loading cylinder pushes the loading slide to drive the turntable 2a to move backward, and the cutter slider 6a drives the s...

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Abstract

The present application provides a compensation mechanism with controllable deflection and crack tip blunt expansion radius, which relates to the technical field of precision molding. The compensation mechanism includes a rod unit and a ball head unit. The rod unit consists of a first rod and a second Two rods are connected; the ball head unit includes a universal rotatable ball head, a ball head push rod and a spring; the compensation mechanism includes a protrusion, and the end of the protrusion is a hemispherical and circular cylinder The body is integrated, and the connection between the hemispherical and circular cylinder is equipped with a universal rotatable ball fulcrum, which solves the problem that the applied load cannot effectively control the deflection of the pipe material end during the dynamic separation process of the metal pipe material. The microscopic manifestation of the problem is that the change of the passivation radius of the crack tip is uncontrollable. Before the crack propagates to the inner wall of the pipe material, the problem of instability and instantaneous failure occurs due to reaching the critical passivation radius of the crack tip in advance.

Description

technical field [0001] The invention relates to the technical field of precision molding, in particular to a compensation mechanism with controllable deflection and crack tip passivation expanding radius. Background technique [0002] Low-stress blanking is to apply crack technology to pipe (or bar) blanking. First, a circumferential crack is artificially prefabricated on the surface of the pipe (or bar), and then the pipe with a circumferential surface crack ( or bar) to apply a certain external force to make it dynamically separate in the form of low stress brittle fracture. Low-stress bending fracture blanking is recognized as the most promising precision blanking method in the future. It makes full use of the notch effect and bending effect of the circumferential V-shaped groove to achieve brittle fracture of materials at low stress levels and obtain geometry-free Distortion, vertical flat fracture, blank without chamfering. At present, scholars have conducted some res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D31/04B21D43/00
CPCB21D31/043B21D43/003
Inventor 张立军杨宁张德潇金永山郭伟健徐嘉怡姜浩张辛相恒富盖永革
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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