A method for induction heating assisted extrusion molding magnesium alloy internal thread
A technology of extrusion molding and induction heating, which is applied in metal processing, metal processing equipment, wire cutting machines, etc., can solve the problems of alloys that cannot be formed into extrusion threads and poor plasticity, and achieve reduced extrusion force and torque, low cost, The effect of reducing wear
Active Publication Date: 2021-08-17
QIQIHAR UNIVERSITY
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[0004] The purpose of the present invention is to provide a method for induction heating assisted extrusion molding magnesium alloy internal thread, which is suitable for magnesium alloy AZ91D with poor plasticity at room temperature, and solves the problem that the alloy cannot form extrusion thread at room temperature
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] Such as figure 1 As shown in —3, the lower side of the main shaft 1 of the machining center is fixedly installed with an extrusion tap 2 through a clamp, and a vise 7 is installed on the workbench 8 of the machining center, and the special fixture 6 is fixed on the vise 7 to ensure the induction of the induction heating machine 4. The coil 3 is located directly above the hole in the special fixture 6 . Specific steps are as follows:
[0022] Step 1: P...
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The invention discloses a method for forming magnesium alloy internal thread with induction heating assistance, which is suitable for magnesium alloy AZ91D with poor plasticity at normal temperature, and solves the problem that the alloy cannot form extrusion thread at normal temperature. In the invention, the magnesium alloy AZ91D ingot is processed into a workpiece, which is placed in a special fixture and tightened. Use the induction coil to heat the magnesium alloy workpiece, and stop heating when the temperature is between 250-320°C monitored by the temperature gauge. The workpiece is extruded with an extrusion tap, the spindle speed is controlled at 60‑300r / min, and the processing depth is 40mm to obtain the magnesium alloy AZ91D internal thread. The cost of this process is low, and the heating efficiency is high. The heating temperature can always be kept in the optimal range through the thermometer. After heating, the strength of the magnesium alloy material can be reduced, the plasticity can be improved, and the extrusion during processing can be reduced. Force and torque, improve the mechanical properties of the thread.
Description
technical field [0001] The invention relates to a method for induction-heating-assisted extrusion forming of a magnesium alloy internal thread, which belongs to the technical field of mechanical processing. Background technique [0002] At present, the processing method of casting magnesium alloy AZ91D thread is to use cutting tap for cutting processing. The traditional cutting tap processing thread will not only produce chips, affect the cleanliness of the thread, but also cause problems such as rotten teeth and slip buttons during use. , affecting the performance of the thread. With the improvement of processing environment requirements and the concept of "green manufacturing", extrusion threads are more and more used in industry, but cast magnesium alloy AZ91D has low elongation and poor plasticity at room temperature, so it is not suitable for extrusion. Press thread processing. [0003] Electromagnetic induction heating uses the method of electromagnetic induction to ...
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IPC IPC(8): B23P25/00
CPCB23G1/18B23G1/44B23G2210/04
Inventor 刘萌高申煣李雪梅樊锐杨金鸽郑永泰梁萍王韩孟凡文翁清鸿
Owner QIQIHAR UNIVERSITY