Aluminum profile graded-speed extrusion process
An extrusion process and aluminum profile technology, applied in the field of aluminum profile segmental speed extrusion process, can solve the problems of head and tail size difference, high breakthrough pressure, and changes start to appear again, so as to achieve convenient operation, overcome irreversible gap, The effect of simple technological process
Active Publication Date: 2013-06-19
CIXI YIMEIJIA ALUMINUM CO LTD
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Problems solved by technology
[0002] General extruders have the functions of constant speed and segment speed for product selection and use. Although constant speed extrusion can keep the outlet temperature and speed basically the same under certain conditions, check and compare the extruded products when using constant speed. The size change of the head, middle, and tail of the product will show a difference of 0.1mm to 0.4mm compared to the head and tail. This is because the breakthrough pressure at the beginning of constant-speed extrusion is high, and the mold is working outwards under high pressure. Due to the oblique opening, when the pressure gradually drops, the mold working belt returns to normal conditions and the dimensions are stable, but when the metal flow at the end of the extrusion is turbulent and the metal supply is insufficient, the dimensional changes begin to appear again, so the constant speed extrusion There is a defect that the extruded product has a difference in the size of the head and the tail
Method used
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Experimental program
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Embodiment Construction
[0015] The staged speed extrusion process of aluminum profiles includes the following steps,
[0016] 1) The first low-speed extrusion:
[0017] Set the extrusion speed to 3.0mm / s, press into the aluminum ingot, and start the molding;
[0018] 2) Constant speed pressurization in the middle section:
[0019] When the profile extruded by step 1) reaches 3000mm, set the speed of the extruder to 3.5mm / s, and extrude at a constant speed;
[0020] 3) High-speed extrusion at the end
[0021] When the profile extruded by step 2) is more than 3000mm away from the discharge end, set the extrusion speed to 3.8mm / s, and extrude until all the profiles are extruded.
[0022] The present invention includes but is not limited to the above-mentioned embodiments, and any product conforming to the description of the claims falls within the protection scope of the present invention.
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The invention relates to an aluminum profile graded-speed extrusion process. The general extruder has the functions of constant speed and variable speed which are selected by the production of a product, wherein the constant-speed extrusion can guarantee the basic consistency of the outlet temperature and the speed under certain condition, but the head and the tail have a difference of 0.1mm-0.4mm when the size changes at the heat part, the middle part and the tail part of the product extruded in the constant speed are checked and compared. The aluminum profile graded-speed extrusion process comprises the following steps: (1) a first-section low-speed extrusion; (2) the middle-section constant speed pressurizing; (3) the tail-section high-speed extrusion. The aluminum profile graded-speed extrusion process provided by the invention is simple in process flow, and convenient to specifically operate, overcomes the defects that the sizes at the head and the tail of the product extruded in the traditional constant speed have irreversible difference, and is widely suitable for the extrusion of various aluminum profile.
Description
technical field [0001] The invention relates to a segmental speed extrusion process of aluminum profiles. Background technique [0002] General extruders have the functions of constant speed and segment speed for product selection and use. Although constant speed extrusion can keep the outlet temperature and speed basically the same under certain conditions, check and compare the extruded products when using constant speed. The size change of the head, middle, and tail of the product will show a difference of 0.1mm to 0.4mm compared to the head and tail. This is because the breakthrough pressure at the beginning of constant-speed extrusion is high, and the mold is working outwards under high pressure. Due to the oblique opening, when the pressure gradually drops, the mold working belt returns to normal conditions and the dimensions are stable, but when the metal flow at the end of the extrusion is turbulent and the metal supply is insufficient, the dimensional changes begin ...
Claims
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IPC IPC(8): B21C23/02
Inventor 罗其达
Owner CIXI YIMEIJIA ALUMINUM CO LTD