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Weight process of drawing and straightening hot extruded shapes

A technology of hot extrusion and profiles, applied in metal extrusion forming tools, metal extrusion, manufacturing tools, etc.

Inactive Publication Date: 2004-07-28
李成顺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing profile extrusion production, large-tonnage extrusion machines are generally equipped with a traction device, but this device is only used for traction, and the traction speed and traction force are certain

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0007] Determination of the weight of the hammer. The weight of the weight can be determined by two methods, experimental method or calculation method. It is also possible to roughly calculate the weight of the hammer used first, and then adjust it through experiments. Hammer weight = cross-sectional area of ​​the profile multiplied by the yield strength of the profile at the temperature of the extrusion die. The weight of the hammer should generally be lower than the calculated weight, so that the profile will be straightened at the highest temperature at the moment it is extruded from the mold, so that the profile will not be stretched after being straightened, and will not be stretched after the temperature is lowered. If the extruded profile has no defects it will not be elongated. If the weight is too heavy, the profile may be elongated, reducing the dimensional accuracy of the profile. The specific calculation method of the weight of the hammer can also refer to the c...

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PUM

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Abstract

The method for straightening thermal-extruded shaped material is characterized by that a weight is directly connected with the extruded shaped material by means of traction rope and gripper, and can give a pull force to extruded shape material to straighten the thermal-extruded shape material. Said method mainly is used for straightening magnesium thermal-extruded shaped material to raise its size accuracy, also can be used for production of aluminium-copper alloy shaped material.

Description

Technical field: [0001] The invention relates to a method for drawing and straightening hot extruded profiles. It is especially related to the production of magnesium alloy hot extrusion profiles, and can also be used in the production of copper profiles and aluminum profiles. The invention belongs to the technical field of material finishing and straightening in material preparation. Background technique: [0002] Magnesium alloys have significant advantages such as low specific gravity, high specific strength and specific stiffness, and low raw material prices. The specific gravity of magnesium is about two-thirds of that of aluminum, that is to say, to produce products of the same type and specification with magnesium and aluminum, the use of magnesium is one-third lighter than that of aluminum by weight; in terms of product output, the output of magnesium products It is 150% of aluminum products. At present, the cost of producing magnesium per ton is lower than that o...

Claims

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Application Information

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IPC IPC(8): B21C25/00B21D3/00
Inventor 李成顺
Owner 李成顺