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Microplastic Forming Method of Titanium Alloy Microgear

A titanium alloy and micro-gear technology, applied in metal extrusion control equipment, metal extrusion, metal processing equipment, etc., can solve the problems of cumbersome procedures, time-consuming and labor-consuming, slow pulse current response, complex mold structure, etc., and achieve The effects of good isometricity, improved filling quality and simple mold structure

Active Publication Date: 2021-03-30
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The plastic processing of titanium alloy needs to heat the material. At present, the commonly used methods of heating the blank are resistance furnace heating, biofuel heating, etc. Due to the limitation of the heating method, the blank needs to be put into the mold after heating and cannot Reheating, the process is cumbersome, time-consuming and labor-intensive
The patent document with the publication number CN109047610A "a titanium alloy micro-gear pulse current assisted micro-molding floating mold" uses pulse current heating to solve the problem that the blank cannot be placed in the mold for heating, but the pulse current used in it has a slow response. The mold structure is complex and the production cost is high

Method used

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  • Microplastic Forming Method of Titanium Alloy Microgear
  • Microplastic Forming Method of Titanium Alloy Microgear
  • Microplastic Forming Method of Titanium Alloy Microgear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Fill the TC4 titanium alloy billet into the mold, and then heat the mold with the TC4 titanium alloy billet with alternating current 1 under the condition of vacuum degree ≤ 0.01Pa and heating rate of 30°C / s, and keep it warm when the temperature rises to 1000°C 60s, and then apply an extrusion force 2 at both ends of the mold. Under the continuous coupling of electric field, temperature field and force field, the TC4 titanium alloy billet undergoes microplastic deformation to form a microgear. Finally, the microgear is taken out after power off and air cooling.

[0043] After testing, the Vickers hardness of the obtained microgear part is 374.4HV, and the dimensional accuracy error is ≤100μm.

Embodiment 2

[0045] Fill the TC4 titanium alloy billet into the mold, and then heat the mold with the TC4 titanium alloy billet with alternating current 1 under the condition of vacuum degree ≤0.01Pa and heating rate of 30°C / s, and keep it warm when the temperature rises to 1200°C 60s, and then apply an extrusion force 2 at both ends of the mold. Under the continuous coupling of electric field, temperature field and force field, the TC4 titanium alloy billet undergoes microplastic deformation to form a microgear. Finally, the microgear is taken out after power off and air cooling.

[0046] After testing, the Vickers hardness of the obtained micro-gear part is 365.6HV, and the dimensional accuracy error is ≤50 μm.

Embodiment 3

[0048] Fill the TC4 titanium alloy billet into the mold, and then heat the mold with the TC4 titanium alloy billet with alternating current 1 under the condition of vacuum degree ≤ 0.01Pa and heating rate of 50°C / s, and keep it warm when the temperature rises to 1200°C 120s, and then apply extrusion force 2 at both ends of the mold. Under the continuous coupling of electric field, temperature field and force field, the TC4 titanium alloy billet undergoes microplastic deformation to form a microgear. Finally, the microgear is taken out after power off and air cooling.

[0049] After testing, the Vickers hardness of the obtained micro-gear part is 360.6HV, and the dimensional accuracy error is ≤30 μm.

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Abstract

The invention relates to a micro plastic forming method of a titanium alloy microgear, and belongs to the technical field of micro plastic forming of micro parts. The method comprises the following steps: filling a die with a titanium alloy blank; charging alternating current to the die filled with the titanium alloy blank under conditions that the vacuum degree is not greater than 0.01Pa and thetemperature increasing speed is 5-100 DEG C per second; heating the titanium alloy blank through joule heat produced by current running through the titanium alloy blank; maintaining temperature for 30-240s when the temperature is increased to be 900-1300 DEG C; applying extruding force to two ends of the die; enabling micro plastic formation of the titanium alloy blank under the continuous coupling effects of an electric field, a temperature field and a power field so as to form the mirogear; powering off; cooling by air; and then taking out the microgear. According to the method, the formingprocess is controllable; the die structure is simple; the processing cost is low; and the microgear forming accuracy is high.

Description

technical field [0001] The invention relates to a microplastic forming method of a titanium alloy micro-gear, and belongs to the technical field of microplastic forming of micro parts. Background technique [0002] With the development of modern science and technology, especially the rapid development of micro-fabrication technology and micro-electro-mechanical systems, and driven by the diverse needs of military struggles in the 21st century, weapons and equipment have also developed rapidly, such as battlefield reconnaissance sensors, intelligent military robots, etc. . Among them, the miniaturization of military weapons and equipment is the most important development trend. Due to the small size of micro-sensors, micro-robots and micro-aircraft, etc., this requires that the components of their structures must be miniature. At present, in terms of driving motors, micro motors with a rotor diameter of 0.5mm and an outer diameter of several millimeters have been manufactur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C25/02B21C29/00B21C31/00
CPCB21C25/02B21C25/025B21C29/003B21C31/00
Inventor 黄坤兰但磊杨屹吴明霞
Owner SICHUAN UNIV
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