L-shaped extrusion device for producing ultra-fine crystal block body material

A technology of block material and extrusion device, applied in the field of L-shaped extrusion device, can solve the problems of not being able to solve the problem of block cracking, failing to meet the requirements of ultra-fine grains, cracking of block materials, etc. The effect of block cracking, improving the degree of grain refinement, and eliminating tensile stress

CN101134211AInactive Publication Date: 2008-03-05TAIYUAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2008-03-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The extrusion apparatus for preparing superfine crystal block material has one structure comprising a die holder, a connecting seat, a conic die case, a conic die core, a wedged extruding rod with reduced extrusion force to avoid cracking of the block, a turning unit, a square vertical channel, a square horizontal channel and a product outlet. The product has high crystal grain fining and smooth surface, and the extrusion apparatus has simple structure, excellent mechanical performance, easy installation and use, and no pollution.
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Description

Technical field

[0001] The invention relates to an L-shaped extrusion device for preparing ultrafine crystal bulk materials, belonging to the technical field of cold extrusion plastic forming of ultrafine crystal bulk materials. Background technique

[0002] Ultra-fine crystal bulk material is a new type of material whose crystal grains are refined to submicron and nanometers. It has good mechanical properties such as rigidity and strength, such as aluminum, copper, magnesium, iron and other crystalline materials, which have a wide range of applications. Value, often used in machinery, electronics, national defense and other industries. Due to the emergence of large plastic deformation technology, the application of ultra-fine crystal bulk metal materials has been well developed, and has good application value and prospects.

[0003] Equal channel angular extrusion technology, referred to as ECAP technology, is an emerging technology field that is currently concerned by the scien...

Examples

Embodiment 1

[0052] Extrusion equipment, die sleeves, cores, extrusion rods, etc. are all in a quasi-working state;

[0053] (1) The surface of the square extrusion rod 7, the wedge-shaped extrusion rod 22 is evenly coated with graphite + petroleum jelly;

[0054] (2) Put the first extruded rod into the vertical channel 8, insert the square extrusion rod 7, and squeeze at an extrusion speed of 0.04mm / s. When the rod is squeezed to the corner 19, pull it out Out of the square extrusion rod 7;

[0055] (3) Replace the wedge-shaped extrusion rod 22 with the wedge-shaped angle surface facing the exit, and squeeze until all the block materials enter the horizontal channel 9, and then pull out the wedge-shaped extrusion rod 22;

[0056] (4) Load the second material rod, press the above steps, eject the first material rod, and discharge it from the product outlets 18 and 10, and complete the first pass of the first material rod. ;

[0057] (5) Pull out the wedge-shaped squeeze rod 22, load it into th...