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Continuous extrusion die for aluminum pipes

An extrusion die and aluminum tube technology, applied in the field of aluminum tube continuous extrusion die, can solve the problems of weak adhesion between the wear-resistant layer and the substrate, weak adhesion between the wear-resistant layer and the substrate, and short life of the mold. Achieve the effect of small grain size, good dimensional stability and good red hardness

Active Publication Date: 2017-05-31
河南明睿达机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prolong the service life of the mold, a wear-resistant layer is usually deposited on the surface of the molded part by thermal deposition or electroplating. However, due to the weak adhesion between the wear-resistant layer and the substrate, the poor wettability between The bonding force between the wear-resistant layer and the substrate is weak, and the wear-resistant layer is difficult to form a tight bond with the substrate. The interface coating is easy to fall off; and the aluminum tube continuous extrusion die with a general coating deposited on the surface of the die is only less than The mold without coating processes about 20% to 30% more molten aluminum, and the life of the mold is still not long

Method used

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  • Continuous extrusion die for aluminum pipes
  • Continuous extrusion die for aluminum pipes
  • Continuous extrusion die for aluminum pipes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides an aluminum tube extrusion molding die, which specifically includes a male die, a female die and a forming mandrel 3 arranged on the male die.

[0045] Such as figure 1 and figure 2 As shown, the punch includes a cylindrical punch base 1 , a punch forming boss 4 and three distribution grooves 2 passing through the punch forming boss 4 and the punch base 1 . Wherein the cylindrical punch base 1 and the punch forming boss 4 are integrated, and the center of the outer end surface of the punch forming boss 4 is provided with an assembly blind hole.

[0046] Such as image 3 and Figure 4 As shown, the forming mandrel 3 includes a forming mandrel base 34 and a wear-resistant and corrosion-resistant coating 35 deposited on the surface of the forming mandrel base 34 . Wherein, the wear-resistant and corrosion-resistant coating 35 is a nano-titanium nitride coating, and the thickness of the nano-titanium nitride coating is 5 microns. The forming m...

Embodiment 2

[0062] This embodiment provides a continuous extrusion die for aluminum tubes. The specific structure differs from that in Embodiment 1 in that:

[0063] The thickness of the wear-resistant and corrosion-resistant coating is 10 microns, and the thickness of the formed gasket 8 is 3 millimeters; the wear-resistant and corrosion-resistant coating is a nano-titanium carbide layer; the forming mandrel substrate and the forming The base of the gasket is processed from cemented carbide materials including the following mass percentage components: WC 85%, TiC 5%, Co 10%.

Embodiment 3

[0065] This embodiment provides a continuous extrusion die for aluminum tubes, the specific structure of which is roughly the same as that in Embodiment 1, except that:

[0066] The thickness of the wear-resistant and corrosion-resistant coating is 8 microns, the thickness of the formed gasket is 8 mm, and the wear-resistant and corrosion-resistant coating is a nano-titanium carbonitride layer; the forming mandrel base and the The formed gasket base is processed from cemented carbide materials including the following mass percentage components: WC 82%, TiC 6%, Co 8%, TaC 4%.

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Abstract

The invention provides a continuous extrusion die for aluminum pipes. The continuous extrusion die comprises a male die, a female die and a forming mandrel arranged on the male die. The female die comprises a female die base body internally provided with an inverted frustum-shaped female die forming cavity, a forming gasket arranged on the inner side of the bottom of the female die base body, and a female die forming through hole penetrating the bottom of the female die and the forming gasket. Each of the forming mandrel and the forming gasket comprises a hard alloy base body and a nanometer titanium nitride layer or a nanometer titanium carbide layer or a nanometer carbon nitride titanium layer depositing on the hard alloy base body, wherein a hard alloy is a titanium carbide niobium molybdenum alloy or a titanium nitride niobium molybdenum alloy or a tungsten titanium alloy. The value of the surface roughness Ra of the hard alloy base body ranges from 0.01 to 0.1. The continuous extrusion die for the aluminum pipes has relatively high red hardness, surface gloss and high-temperature corrosion resistance, and the die has a relatively long service life.

Description

technical field [0001] The invention relates to the technical field of dies, in particular to an aluminum tube continuous extrusion die. Background technique [0002] Seamless metal pipe products are usually produced in batches by extrusion process, and in the extrusion molding process, the shape stability of molded parts and the surface finish of molded parts will have a great impact on the size and finish of metal pipe products. influences. Existing molded parts are often repaired or even scrapped directly due to the reduction in size or surface finish of molded parts after continuous high-temperature use, resulting in huge economic losses. For example, the existing aluminum tube continuous extrusion die, when producing aluminum tubes with a pipe outer diameter of 7.5mm and a pipe wall thickness of 0.7mm, usually can only process about 10 tons of molten aluminum into aluminum pipes. The continuous extrusion die has reached the level of scrapping due to dimensional tolera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02
CPCB22D18/02
Inventor 王诗绮王永明
Owner 河南明睿达机械制造有限公司
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