WO2010051754A1

WO2010051754A1 - Broad-width extrusion device and extrusion process thereof

Info

Publication number: WO2010051754A1
Application number: PCT/CN2009/074791
Authority: WO
Inventors: 权高峰; 严峰; 周鹤龄
Original assignee: 北京华盛荣镁业科技有限公司; 大连交通大学
Priority date: 2008-11-04
Filing date: 2009-11-04
Publication date: 2010-05-14
Also published as: CN101391269A; CN101391269B

Abstract

A broad-width extrusion device comprises an extrusion machine and a temperature measuring-cooling system. The extrusion container (11) of the extrusion machine is provided with flat extrusion cavity (111) and a corresponding flat sleeve (116). A guide rail is arranged below the extrusion container (11). Correspondingly, the machine also comprises a combined structure of a flat extrusion rod (13) and an extrusion seat (14), and the extrusion rod (13) is connected with the piston (183) of a hydraulic cylinder via the extrusion seat (14). The height and width of the combined surface of the extrusion seat (14) and the extrusion rod (13) are respectively equal to and no less than the corresponding size of the extrusion rod (13). A corresponding extrusion process adopts the extrusion container (11) having the flat extrusion cavity (111), uses flat ingots as blanks and adopts the combined structure of the flat extrusion rod (13) and the extrusion seat (14), thus realizing high-efficiency extrusion of large-sized magnesium alloy and aluminum alloy sheet and broad-width section.

Description

Wide extrusion device and extrusion process This application is filed on November 4, 2008 and submitted to the China Patent Office.

200810228577.2, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in its entirety in the the the the the the the the the Technical field

The present invention relates to an extrusion apparatus and an extrusion tool for aluminum alloys and magnesium alloys, and more particularly to a wide extrusion apparatus and extrusion process. Background technique

As the lightest high-performance structural material, magnesium alloy has great application prospects in the manufacture of aerospace vehicles, transportation equipment, especially modern rail transportation equipment, such as floor and door panels. And other structures. However, large-size plates and profiles are extremely rare in the market and are expensive; currently there are no wide profiles with a width of more than 650 mm on the domestic and international markets, and industrially only wide-width profiles with a width of more than 650 mm can be obtained by welding. However, the performance of the profile after welding will be greatly reduced. Therefore, it is urgent to solve this problem from the equipment and technical level. Due to the crystal structure characteristics of the hexagonal hexagonal inside of the magnesium alloy, the plastic working resistance under the normal conditions is greater than that of the aluminum alloy, as shown in Table 1. The existing magnesium alloy sheet production follows the production technology of aluminum alloy, namely, ingot casting, Hot rolling and cold rolling, while in rolling, large-size magnesium alloy ingots are difficult to open, easy to crack, limited in pass reduction, and different optimum requirements for different passes, requiring multiple intermediate heating (annealing) ), edge cracking is more common, every rolling needs Cutting edges has caused disadvantages such as low efficiency, low yield, and high cost. Conventional magnesium alloy profile extrusion, currently using conventional extrusion equipment, because the extrusion cylinder is cylindrical, the width of the profile produced is limited by the diameter of the extrusion cylinder, even the largest 10,000-ton extruder at home and abroad, the largest extrusion The diameter of the cylinder is only 550mm, and the maximum width of the extruded aluminum alloy profile can only reach 600mm. For wide and large profiles, such as hollow flat profiles with dimensions of 25mm X 700mm X 30000mm, the current equipment and technology cannot be realized. Production processing, as mentioned above, the plastic working deformation ability of magnesium alloy is lower than that of aluminum alloy, and the expansion ratio of the ingot which can be realized when extruding magnesium alloy ultra-wide sheet and ultra-wide profile is constrained by the diameter of the ingot. The diameter of the ingot depends on the diameter of the barrel; the diameter of the conventional barrel is determined by the maximum extrusion capacity of the extruder. Therefore, the extrusion of wide and large gauge plates and profiles cannot be achieved with conventional extrusion equipment. The wide-squeezing method for the production of wide slabs and wide profiles will fundamentally solve this technical bottleneck.

Extrudable material properties

Summary of the invention

In view of the above problems in the prior art, the present invention aims to provide a wide-width extrusion device and an extrusion process to fundamentally solve this technical bottleneck, thereby achieving high-efficiency realization of a 10,000-ton extruder. Extruded production of wide format profiles and slabs/slabs.

The technical solution of the present invention is implemented as follows: A wide-width extrusion device comprising an extruder and a temperature-cooling system, the extruder comprising a squeeze barrel, a squeeze rod, a main body support-positioning structure, a movable beam, a feeding mechanism, a hydraulic system and a control system The main body support-positioning structure comprises a rigid structure formed by a front and rear cross member and two upper and lower symmetrical tension columns, and a mold frame is fixedly mounted on the right side of the front cross member, and the mold frame is located in the extrusion tube Between the front beam and the front beam; the cylinder is fixedly coupled with the rear beam, the piston is fixedly coupled with the movable beam, and the movable beam is sleeved on the tension column and horizontally slides along the tension column with the action of the piston; the temperature measurement-cooling system is located The exit position of the extrusion on the left side of the front beam;

The extrusion cylinder has a flat extrusion cavity and a flat extrusion cylinder casing adapted thereto; the flat extrusion cylinder casing has an elliptical cross section;

The guide rail is further provided with a guide rail, and the guide rail has the same foundation and the same central axis as the main body support-positioning structure;

The pressing rod has a flat cross section adapted to the flat pressing cavity, and is connected to the piston of the oil cylinder through the pressing seat; the height and the width of the joint surface of the pressing seat and the pressing rod respectively Equal to and not less than the corresponding size of the extruded rod.

The hydraulic system is a combined hydraulic system, comprising a main oil cylinder and two auxiliary oil cylinders respectively fixedly connected with the rear cross beam, the main piston and the secondary piston are respectively fixedly connected with the movable beam, and the main piston passes through the pressing seat and the extrusion rod Connected.

An extrusion process for wide profiles and sheets, including the following processes:

(1) Mounting the mold: Mount the mold on the mold rack;

(2) Preparing a flat blank: The flat blank is slag removed by the surface, and after being pretreated, it is fed into the extrusion cylinder by the feeding mechanism;

(3) The flat blank enters the flat extrusion chamber: The combined hydraulic system is used, and the main cylinder is opened. The auxiliary cylinder moves to drive the movable beam forward, and the extrusion rod is pushed forward by the pressing seat and the flat blank is sent into the flat extrusion cavity of the same size;

(4) Clamping: The main cylinder is fully open, the sub-cylinder continues to move, and the extrusion cylinder is moved forward along the lower rail by the pushing rod, and is aligned with the mold frame mounted on the front beam to complete the clamping;

(5) Extrusion: The main and auxiliary cylinders move at the same time, the extrusion rod moves forward synchronously with the movable beam, and the blank is extruded through the die to form an extrusion and is sent out from the outer outlet of the front beam;

(6) Temperature measurement and cooling: At the outer exit of the front beam, the temperature measurement-cooling system is started in real time, and the cooling intensity is controlled according to the actual outlet temperature;

(7) Trimming and trimming: The trimming machine trims the extruded parts and trims them;

(8) The tractor is moved away from the console by clamping the clamping member.

The flat extrusion cavity is a rectangular flat cavity with a circular arc on the side, the height and width = (200 - 300) (700 - 800) mm, and the flat blank is a magnesium alloy annealed ingot having the same shape and size. The combined hydraulic system has a total nominal pressure of 4,500 to 8,000 tons; the horizontal indexing force of the tractor is >200 tons.

The beneficial effects of the present invention are obvious compared to the prior art:

Since the flat extrusion tube is used in the invention, the slab is used as the extrusion blank, and the combined structure of the flat extrusion rod and the extrusion seat is used, the flow field distribution during the extrusion process is greatly improved, and the actual extrusion is remarkably reduced. The pressure ratio effectively reduces the actual extrusion force and the complexity of the equipment, reduces the power of the power source of the extrusion equipment, and enables the conventional commercial hydraulic source of 4500 to 8000 tons to be used for wide-width extrusion, which reduces the construction cost of the overall equipment. 40% ~ 50%, can achieve high-efficiency extrusion of large-size magnesium alloy, aluminum alloy flat plate and wide profile, and obtain wide profile or plate with a width of more than 750mm, especially to overcome the low rate of magnesium alloy rolling. The disadvantage of low production efficiency, high efficiency and 10,000 tons of extrusion The press is also difficult to produce ultra-wide profile and sheet/slab extrusion production. DRAWINGS

1 is a schematic structural view of an embodiment of the present invention;

2 is a schematic structural view of an embodiment of an extruder of the present invention;

Figure 3 is a plan view of the embodiment of Figure 2 of the present invention;

4 is a schematic structural view of an embodiment of an extrusion cylinder of the present invention;

Figure 5 is a left side view of the embodiment of Figure 4 of the present invention;

6 is a schematic view showing an embodiment of a combined structure of an extruded rod-extrusion seat of the present invention; FIG. 7 is a schematic structural view of an embodiment of a front cross member according to the present invention;

Figure 8 is a left side view of the embodiment of Figure 7 of the present invention;

9 is a schematic structural view of an embodiment of a rear cross member of the present invention;

Figure 10 is a left side elevational view of the embodiment of Figure 9 of the present invention;

Figure 11 is a schematic structural view of an embodiment of a movable beam of the present invention;

Figure 12 is a left side elevational view of the embodiment of Figure 11 of the present invention. detailed description

The invention will now be further described with reference to the accompanying drawings:

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of an embodiment of the present invention. As shown in Fig. 1, the wide extrusion apparatus comprises an extruder and a temperature measuring-cooling system, and is equipped with a cutting machine 3 and a tractor 4.

Figure 2 is a schematic view showing the structure of an embodiment of the extruder of the present invention, and Figure 3 is a plan view of the embodiment of Figure 2 of the present invention. As shown in Figures 1, 2 and 3, the extruder comprises an extrusion cylinder. 11, Extrusion rod-extrusion seat, main body support-positioning structure, movable beam 15, feeding mechanism 12, combined hydraulic system and control system;

4 is a schematic structural view of an embodiment of the extrusion cylinder of the present invention, and FIG. 5 is a left side view of the embodiment shown in FIG. 4 of the present invention. As shown in FIGS. 4 and 5, the extrusion cylinder 11 has a side arc. Rectangular flat extrusion cavity 111 having a height X width = (200 ~ 300) (700 ~ 800) mm, the outer portion of which is a flat extrusion cylinder casing 116; the flat extrusion cylinder casing 116 has an ellipse Round section, between the extrusion chamber 111 and the outer casing 116, including the extrusion liner lining 112, the extrusion sleeve 113, the axially uniform 12 sets of 45*100 heaters 114 and the heat insulation-insulation layer from inside to outside a guide rail is further disposed under the squeeze tube 11 , and the guide rail has the same foundation and the same central axis as the main body support-positioning structure;

Figure 6 is a schematic view showing an embodiment of the combined structure of the extrusion rod-extrusion seat of the present invention. As shown in Figure 6, the extrusion rod 13 has a flat cross section adapted to the extrusion chamber 111 and is extruded. The seat 14 is connected to the main piston 183 of the combined hydraulic system; the height and width of the joint surface of the pressing seat 14 and the pressing rod 13 are respectively equal to and slightly larger than the corresponding size of the pressing rod 13; The positioning structure comprises a rigid structure formed by a fixed connection of a front cross member 161 and a rear cross member 163, and two upper and lower symmetrical force bars 162; the front cross member 161 is shown in Figs. 7 and 8, and Fig. 7 is the present invention. FIG. 8 is a left side view of the embodiment shown in FIG. 7 according to the present invention; the rear cross member 163 is shown in FIG. 9 and FIG. 10, and FIG. 9 is a structure of an embodiment of the rear cross member of the present invention. 10 is a left side view of the embodiment shown in FIG. 9; the movable beam 15 is as shown in FIG. 11 and FIG. 12, FIG. 11 is a schematic structural view of an embodiment of a movable beam according to the present invention, and FIG. Left side view of the embodiment shown in Figure 11; solidified on the right side of the front cross member 161 A mold holder 17 is fixedly mounted, and the mold holder is located at the extrusion tube 11 and the front cross Between the beams 161, the main cylinder 181, the sub-cylinder 182 and the rear cross member 163 are fixedly coupled; the main piston 183 and the sub-piston 184 of the combined hydraulic system are fixedly coupled to the movable beam 15, and the movable beam 15 is placed on the tension column 162. Up and down along the tension column 162 with the action of the piston; as shown in Figure 1, Figure 2 and Figure 3;

The combined hydraulic system includes a main cylinder 181 and two sub-cylinders 182a and 182b, as shown in Figs. 1, 2, and 3, which are conventional commercial devices, and have the same crushing force as the ordinary extruder. ^p屯.

The temperature measuring-cooling system is located at the exit position of the extrusion on the left side of the front cross member 161, and the outlet profile is cooled by the row of powerful blowers 2, as shown in Figs. 1, 2 and 3.

The cutting machine 3 and the tractor 4 are arranged on a console outside the exit of the front cross member 161, as shown in Fig. 1. The tractor 4 is a high-power traction system with a >200-ton hydraulic traction system, which is designed for the market.

The wide-width extrusion profiles and sheets of magnesium alloys are produced using the above wide-format extrusion device with a width of >750 mm. The process is as follows:

(1) mounting the mold: mounting the mold on the mold frame 17;

(2) Preparation of the flat blank: The flat blank is a magnesium alloy annealed ingot, which has the same specifications as the flat extrusion chamber 111 of the extrusion cylinder 11, is subjected to surface slag removal, and is pretreated, and then fed to the extrusion cylinder 11 by the feeding mechanism 12. Before

(3) The flat blank enters the flat extrusion chamber 111: With the combined hydraulic system, the main cylinder 181 is opened, the auxiliary cylinders 182a and 182b are actuated, and the movable beam 15 is moved forward, and the squeeze seat 14 is pushed forward.

(4) Clamping: The main cylinder 181 is fully open, the sub-cylinders 182a and 182b continue to move, and the cylinder is squeezed 11 is advanced along the lower rail thereof under the pushing of the pressing rod 13, and is aligned with the mold frame 17 mounted on the front beam 161 to complete the clamping;

(5) Extrusion molding: the main cylinder 181 and the sub-cylinder 182 are simultaneously operated, the extrusion rod 13 moves forward in synchronization with the movable beam 15, and the blank is extruded through a die to form an extrusion member and is sent out from the outer outlet of the front cross member 161;

(6) Temperature measurement and cooling: At the outer exit of the front beam 161, the temperature measurement-cooling system is started in real time, and the cooling intensity is controlled according to the actual outlet temperature;

(7) Trimming and trimming: Trimming machine 3 Trimming the extrusions to trim the edges;

(8) The tractor 4 is moved away from the console by clamping the clamping member.

Magnesium alloy wide profiles and sheets (width > 750mm) are currently in short supply on the market. The device of the invention can produce:

1. Flat profile: width >750mm, total thickness 15 ~ 50mm, hollow, wall thickness 2.5 ~ 5.0mm, length 10000 ~ 40000mm. The products are mainly used for lightweight and medium-sized lightweight structures such as railway train equipment (such as train body), aviation, and spacecraft structures.

Second, solid slab: width > 750mm, thickness 8 ~ 25mm, length > 15000mm. The finished product rate is >90%.

These extruded sheets are general-purpose products that can be used directly as sheets or as high-quality slabs for rolling thin sheets of smaller thickness and wider width (eg > 2500mm) to meet new types of vehicles and reduce weight. Demand for ultra-wide magnesium alloy products in the fields of rail transportation equipment, aircraft, military equipment, etc.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any technical person skilled in the art within the technical scope disclosed by the present invention, the technical solution according to the present invention Equivalent substitutions or modifications of the inventive concept are intended to be included within the scope of the invention.

Claims

Rights request

1. A wide-width extrusion apparatus comprising an extruder and a temperature-cooling system, the extruder comprising a squeeze barrel, a squeeze rod, a main body support-positioning structure, a movable beam, a feeding mechanism, a hydraulic system, and a control system; the main body support-positioning structure comprises a rigid structure formed by a front and rear cross member and two upper and lower symmetrical tension columns, and a mold frame is fixedly mounted on a right side of the front cross member, and the mold frame is located Between the pressure cylinder and the front beam; the oil cylinder is fixedly coupled with the rear beam, the piston is fixedly coupled with the movable beam, and the movable beam is sleeved on the tension column and horizontally slides along the tension column with the action of the piston; the temperature measurement-cooling The system is located at the exit position of the extrusion on the left side of the front beam; it is characterized by:

2. The wide extrusion apparatus according to claim 1, wherein said hydraulic system is a combined hydraulic system comprising a main cylinder and two sub-cylinders and fixedly connected to the rear cross member, respectively, the primary piston and the secondary piston Then, the movable beam is fixedly connected, and the main piston is connected to the extrusion rod through the pressing seat.

3. An extrusion process for a wide profile and a sheet, characterized in that it comprises the following process: (1) Mounting the mold: Mount the mold on the mold rack;

(3) The flat blank enters the flat extrusion chamber: The composite hydraulic system is used, the main cylinder is opened, the auxiliary cylinder is actuated, and the movable beam is moved forward. The extrusion rod is pushed forward by the pressing seat and the flat blank is fed into and a flat extrusion chamber of comparable size;

(8) The tractor is moved away from the console by clamping the clamping member.

4. The extrusion process of a wide profile and a sheet material according to claim 3, wherein the flat extrusion cavity is a rectangular flat cavity having a circular arc on the side, and the height X width is (200 to 300). X (700 ~ 800) mm, the flat blank is a magnesium alloy annealed ingot having a shape size consistent with the same; the total nominal pressure of the combined hydraulic system is 4500 to 8000 tons; the horizontal indexing force of the tractor ≥200 tons.