Method for induction heating assisted extrusion forming of magnesium alloy internal threads
A technology of extrusion molding and induction heating, which is applied in the field of mechanical processing, can solve the problems of poor plasticity and the inability of alloys to form extrusion threads, etc., and achieve the effects of low cost, reduced extrusion force and torque, and improved processing efficiency
Active Publication Date: 2020-02-11
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 induction heating assisted extrusion forming of magnesium alloy internal threads. The method is suitable for a magnesium alloy AZ91D with poor plasticity at normaltemperature, and by the method, the problem that the extrusion forming of the threads of the alloy cannot be achieved at normal temperature is solved. The method comprises the following steps of machining a magnesium alloy AZ91D ingot into a workpiece, and placing the workpiece in a special clamp for screwing; heating the magnesium alloy workpiece by using an induction coil, and stopping heatingwhen the temperature is monitored to be within the range of 250-320 DEG C through a thermometer; and using an extrusion tap to extrude the workpiece, controlling the rotating speed of a main shaft tobe 60-300 r / min, and machining the workpiece 40 mm in the depth direction to obtain the magnesium alloy AZ91D internal threads. The method has the advantages that the cost is low, the heating efficiency is high, the heating temperature can be kept in the optimal range all the time through the thermometer, the strength of the magnesium alloy can be reduced and the plasticity can be improved after heating, the extrusion force and the torque in the machining process can be reduced, and the mechanical properties of the threads can be improved.
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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Login to View More IPC IPC(8): B23G1/18B23G1/44
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