CN209935555U

CN209935555U - Nested formula aluminium alloy extrusion die lower mould

Info

Publication number: CN209935555U
Application number: CN201920453241.XU
Authority: CN
Inventors: 王乾廷; 谢志敏; 梁卫抗; 董俊豪; 段晋昌; 王建杰; 刘琼; 吴玉萍
Original assignee: Fujian University of Technology
Current assignee: Fujian University of Technology
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2020-01-14
Anticipated expiration: 2029-04-04

Abstract

The utility model discloses a nested formula aluminium alloy extrusion die lower mould, including cylindric shell, the shell external diameter is the same with the mould external diameter on the extrusion die, and the shell bottom is equipped with the nib, has set the inner bag in the shell, and the inner bag flushes for cylindric and its up end and shell terminal surface, and the inner bag upper end middle part is interior to form the chamber of welding, welds the chamber bottom and is equipped with the correspondence the work area in nib, the indoor aluminium material of welding is through the nib extrusion moulding under the mould core cooperation on work area and extrusion die. The utility model has simple structure, on one hand, the production can be continued by replacing a new welding chamber liner, thereby not only saving the die changing time, but also avoiding the loss problem caused by scrapping the whole die; on the other hand, the flow speed of the aluminum material can be improved, the production efficiency is improved, and the probability of mold blocking and cracking of the shunting bridge can be reduced; meanwhile, the nested structure facilitates cleaning of the welding chamber when the die stops production.

Description

Nested formula aluminium alloy extrusion die lower mould

Technical Field

The invention relates to the technical field of profile extrusion forming, in particular to a nested lower die of an aluminum profile extrusion die.

Background

The working principle of the plane shunting die is that a solid ingot is adopted, under the action of extrusion force, the ingot is divided into a plurality of metal flows when passing through a shunting hole of an upper die shunting bridge of the extrusion die, then the metal flows are welded again in a welding chamber with high temperature, high pressure and high vacuum, and finally aluminum materials are extruded through the matching of an upper die core of the extrusion die and a lower die core hole of the extrusion die, so that a pipe or a hollow section meeting certain size requirements is formed.

The aluminum profile extrusion die is in service in the environment of high temperature (400 ℃ -. Meanwhile, most of the traditional lower dies of the extrusion dies are integrally designed, metal materials such as H13 steel are selected as materials, and once the materials fail, the whole die is scrapped, so that great waste is caused.

Disclosure of Invention

The invention aims to provide a nested lower die of an aluminum profile extrusion die, which can be used for rapidly replacing a damaged welding chamber liner by detaching the damaged welding chamber liner, saving die replacement time and improving production efficiency, thereby avoiding the loss problem caused by scrapping of the whole die.

In order to achieve the purpose, the technical scheme of the invention is as follows: a nested aluminum profile extrusion die lower die comprises a cylindrical shell, the outer diameter of the shell is the same as that of an extrusion die upper die, a die hole is formed in the bottom of the shell, an inner container is embedded in the shell, the inner container is cylindrical, the upper end face of the inner container is flush with the end face of the shell, a welding chamber is formed in the middle of the upper end of the inner container in a concave mode, a working belt corresponding to the die hole is arranged at the bottom of the welding chamber, and aluminum materials in the welding chamber are extruded and formed through the die hole under the matching of the working belt and the extrusion die upper die; a round chamfer is arranged between the bottom and the side wall of the welding chamber; the side wall of the welding chamber is also convexly provided with a columnar pier for bearing the extrusion force transmitted by the upper die diversion bridge of the extrusion die; the inner container is made of ceramic materials, and the bottom surface and the inner wall of the welding chamber are both subjected to smoothing treatment.

Furthermore, the outer wall of the inner container is provided with a groove which is arranged along the axial direction of the inner container, the inner wall of the shell is provided with a convex edge which is embedded in the groove, and the convex edge is matched with the groove to position the inner container.

The invention has the beneficial effects that: the invention has simple structure, changes the integral design into the nested design, on one hand, when the welding chamber has the problems of serious abrasion, material sticking, pier block collapse, fracture and the like, the production can be continued by replacing the inner container of the welding chamber, thereby not only saving the die change time, but also avoiding the loss problem caused by the scrapping of the integral die; on the other hand, in the extrusion process, the aluminum material flows into the welding chamber, the material flow speed is low under the friction action of the wall of the welding chamber, the ceramic inner container is adopted, the flowing speed of the aluminum material can be improved, the production efficiency is improved, the probability of die blocking and the cracking of a shunting bridge can be reduced, and the nested structure is convenient for cleaning the welding chamber when the die stops production.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the housing;

fig. 3 is a top view of the liner.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1, a nested aluminum profile extrusion die lower die comprises a cylindrical shell 1, the outer diameter of the shell 1 is the same as that of an extrusion die upper die, a die hole 2 is formed in the bottom of the shell 1, an inner container 3 is embedded in the shell 1, the inner container 3 is cylindrical, the upper end face of the inner container is flush with the end face of the shell 1, a welding chamber 4 is formed in the middle of the upper end of the inner container 3 in a concave mode, a working belt 5 corresponding to the die hole 2 is arranged at the bottom of the welding chamber 4, and aluminum materials in the welding chamber 4 are extruded and formed through the die hole 2 under the matching of the working belt 5 and the extrusion die upper die; a round chamfer 6 is arranged between the bottom and the side wall of the welding chamber 4; a columnar pier 7 is also convexly formed on the side wall of the welding chamber 4 and used for bearing extrusion force transmitted by the upper die diversion bridge of the extrusion die; the inner container 3 is made of ceramic materials, and the bottom surface and the inner wall of the welding chamber 4 are both subjected to smoothing treatment.

Further, as shown in fig. 2-3, the outer wall of the inner container 3 is provided with a groove 8 arranged along the axial direction thereof, the inner wall of the outer shell 1 is provided with a rib 9 embedded in the groove 8, and the rib 9 is matched with the groove 8 to position the inner container 3, so that the alignment of the working tape 5 and the die hole 2 is realized.

The invention has simple structure, changes the integral design into the nested design, on one hand, when the welding chamber has the problems of serious abrasion, material sticking, pier block collapse, fracture and the like, the production can be continued by replacing the welding chamber liner with a new one, the installation is rapid and convenient, the die change time is saved, and the loss problem caused by the scrapping of the whole die can be avoided; on the other hand, in the extrusion process, the aluminum material flows into the welding chamber, the material flow speed is low under the friction action of the wall of the welding chamber, and the ceramic inner container is adopted, so that the flowing speed of the aluminum material can be increased, the production efficiency is improved, and the probability of die blocking and the cracking of a shunting bridge can be reduced.

The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.

Claims

1. A nested aluminum profile extrusion die lower die is characterized by comprising a cylindrical shell, the outer diameter of the shell is the same as that of an extrusion die upper die, a die hole is formed in the bottom of the shell, an inner container is embedded in the shell, the inner container is cylindrical, the upper end face of the inner container is flush with the end face of the shell, a welding chamber is formed in the middle of the upper end of the inner container in a concave mode, a working belt corresponding to the die hole is arranged at the bottom of the welding chamber, and aluminum materials in the welding chamber are extruded and formed through the die hole under the matching of the working belt and the extrusion die upper die core; a round chamfer is arranged between the bottom and the side wall of the welding chamber; the side wall of the welding chamber is also convexly provided with a columnar pier for bearing the extrusion force transmitted by the upper die diversion bridge of the extrusion die; the inner container is made of ceramic materials, and the bottom surface and the inner wall of the welding chamber are both subjected to smoothing treatment.

2. The lower die of the nested aluminum profile extrusion die as recited in claim 1, wherein the outer wall of the inner container is provided with a groove arranged along the axial direction of the inner container, the inner wall of the outer shell is provided with a rib embedded in the groove, and the rib and the groove are matched to position the inner container.