the accuracy of the temperature measurement system is poor, the direct measurement of the deformation temperature of the metal detection device has not been successfully developed in the die hole, it can not achieve true isothermal extrusion, commonly used simulation and isothermal extrusion method, to simulate a variety of alloy products isothermal extrusion temperature the speed of extrusion conditions, to achieve approximately isothermal extrusion process World Pipe network informed. If a mathematical model based on a pilot or production, with the electronic numerical control systems and automatic control of the extrusion process; some piecewise reduce the section of the extrusion speed extrusion method to achieve this goal; there are billets billets temperature gradually reduce the gradient temperature heating. Advanced extruder equipped with isothermal extrusion simulation to automatically adjust the system.
Entry:
isothermal extrusion to enable the head and tail of the geometric dimensions of the entire product surface quality and internal organization and physical properties, and so achieve the best results, greatly improving productivity. Extrusion temperature change control within ± 3 ° C range can be achieved to a hardening of hard aluminum alloy extrusion, to create the conditions for the continuous production, is an ideal extrusion. Isothermal extrusion metal outflow speed can be controlled to prevent the periodic cracks in the product surface, are widely used in the extrusion of titanium and titanium alloy is also suitable for extrusion of hard aluminum alloy products, aluminum doors and windows especially suitable for high-grade extruded profiles for architecture requirements.
temperature extrusion mold structure as shown. The mold with mold heating, thermal insulation and mold temperature control device. Work, the sensor will die heating, blank heating in the mold outside. When the upper die torn off under the heat shield, heated blank into the die. Extrusion is completed, the extrusion by playing the feed rod and lay.
isothermal extrusion basic principle is: the determination of products by non-contact temperature measurement devices installed near the hole in the mold die hole temperature, product temperature changes into telecommunications input to the electronic control system World pipe network reported that the world's steel pipe network to provide the world's steel pipe network editor , and prepared in advance at a speed of relations, automatically adjust the speed of extrusion temperature is kept constant (slightly lower than the temperature of the cracks).
Such as warm extrusion (isothermal extrusion)
squeeze the die hole of metal deformation temperature is always maintained constant extrusion process.