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Mold/non-mode combined pulling process and device

A combined drawing and process technology, used in metal drawing forming tools, metal wire drawing, manufacturing tools and other directions, can solve the problems of reducing drawing force, large deformation without die drawing and die drawing, etc. The effect of drawing force, shortening drawing pass, convenient operation and maintenance

Active Publication Date: 2011-07-27
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention installs a drawing die directly between the heater and the cooler of the dieless drawing device, and aims to develop a combination of the dieless drawing and the die drawing two drawing processes on this basis. Two-in-one molded / dieless combined drawing process (also known as "semi-dieless drawing process"), and a molded / dieless combined drawing device (also known as "semi-dieless drawing device") ”), make full use of the waste heat of dieless drawing, ensure that the mold temperature drawing is completed before the end of dieless drawing and improve the surface quality, greatly reduce the drawing force, and omit the intermediate heat treatment or heating process of the traditional process, Reduce mold consumption, save energy, reduce production costs, short-process efficient drawing and forming of high-quality metal products, and has the advantages of large amount of deformation in dieless drawing and high dimensional accuracy in die-drawing. Problems existing in the die-drawing process in the production of metal products, providing a die-with-die combined drawing process and device

Method used

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  • Mold/non-mode combined pulling process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A nearly equiatomic ratio nickel-titanium shape memory alloy wire rod with a diameter of 6 mm was selected as the billet, which passed through the feeding mechanism (2), heater (3), drawing die (4), cooler (5) and The traction mechanism (6); then, turn on the heater (3) to heat it to 783K (0.50 times its melting point temperature Tm); start the feeding mechanism (2) and the traction mechanism (6) at the same time, at the drawing speed Vo Under the condition of the ratio Vo / Vi=2.2 to the feed speed Vi of the billet, the joint drawing with die (4) and the cooler (5) is used to complete the combined drawing with die / die; the diameter is 4 mm and the surface finish is good. , Near-equal atomic ratio nickel-titanium shape memory alloy wire with high dimensional accuracy.

Embodiment 2

[0032] Select 304 stainless steel wire rod with a diameter of 6 mm as the billet, pass through the feeding mechanism (2), heater (3), drawing die (4), cooler (5) and traction mechanism (6) in sequence after being sharpened; then , turn on the heater (3) to heat it to 1540K (0.90 times its melting point temperature Tm); start the feeding mechanism (2) and traction mechanism (6) at the same time, at the drawing speed Vo and the billet feeding speed Vi Under the condition of ratio Vo / Vi=2.8, through the action of drawing die (4) and cooler (5), combined drawing with die / die is completed; 304 stainless steel with a diameter of 3.6 mm, good surface finish and high dimensional accuracy is obtained wire.

Embodiment 3

[0034] Select the YL12 aluminum alloy wire rod with a diameter of 6 mm as the billet, and pass through the feeding mechanism (2), heater (3), drawing die (4), cooler (5) and traction mechanism (6) in sequence after tipping; Then, turn on the heater (3) to heat it to 745K (0.85 times its melting point temperature Tm); start the feeding mechanism (2) and traction mechanism (6) at the same time, at the drawing speed Vo and the billet feeding speed Vi Under the condition of the ratio Vo / Vi=2.3, through the drawing die (4) and cooler (5) to complete the joint drawing with die / die; obtain YL12 with a diameter of 4 mm, good surface finish and high dimensional accuracy Aluminum alloy wire.

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Abstract

The invention belongs to the technical field of metal plastic processing, and particularly provides a mold / non-mold combined pulling process and a device. The device is characterized in that a pulling mold is directly installed between a heater and a cooling machine of a non-mold pulling device, the waste heat of non-mold pulling is utilized fully, so that the mold puling and sizing with temperature can be completed before the non-mold pulling is molded, and the surface quality is improved. In the invention, the pulling force is reduced greatly, the intermediate heat treatment or heating process of the traditional process is saved, the mold consumption is reduced, the energy resource is saved, the production cost is lowered, a high-quality metal product can be pulled and molded in short flow range, and the advantages that the deformation amount of the non-mold pulling is large, the precise of the mold pulling size is high and the like can be realized.

Description

technical field [0001] The invention belongs to the technical field of metal plastic processing, and in particular provides a molded / modeless combined drawing process and device. Background technique [0002] Drawing products such as metal pipes, rods, profiles, wires and wires have extensive and important uses in the national economy and national defense industry. With the rapid development of the national economy, national defense industry and high-tech, the demand for drawn metal products is increasing, and the performance requirements are also getting higher and higher. Moreover, since the 21st century, the current situation of environmental degradation and resource and energy shortages has posed new challenges to the manufacturing industry, requiring the drawing process of metal products to be short-process, near-net shape, high-efficiency, low-cost, and energy-saving. The direction of development, improving the quality of traditional drawn metal products, improving th...

Claims

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Application Information

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IPC IPC(8): B21C1/00B21C3/00B21C9/00
Inventor 刘雪峰秦芳张野谢建新
Owner UNIV OF SCI & TECH BEIJING
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