A magnesium-aluminum composite board different-temperature pre-combining device

Abstract

The application provides a magnesium-aluminum composite board different-temperature pre-combining device, which is composed of an upper sealing cover, a lower sealing cover and a box door connected through bolts to form an upper heating box and a lower heating box, and a protection space is formed by sealing the internal cavity; a movable heat insulation plate is arranged between the upper sealing cover and the lower sealing cover, so that the two side boxes form independent heating sealed spaces; heating pipes and thermocouples are arranged in the upper sealing cover and the lower sealing cover and connected with a temperature control device; a push rod is vertically arranged at the top of the upper sealing cover, the top of the push rod is connected with a pressing machine, the bottom of the push rod is connected with a flange plate, the flange plate is connected with an upper clamping seat, a lower supporting seat is arranged at the bottom of the lower sealing cover, the top of the lower supporting seat is fixedly connected with a lower pressing seat, and a lower clamping block is connected with the lower pressing seat in a matched mode through a sliding groove. The magnesium-aluminum alloy is heated at different temperatures, the deformation capacity of the magnesium-aluminum alloy is effectively coordinated, the cost is reduced, and a fast and effective experimental device is provided.

Description

Technical Field

[0001] This invention belongs to the field of metal composite plate preparation technology, specifically relating to a magnesium-aluminum composite plate heterogeneous pre-composite device. Background Technology

[0002] Magnesium-aluminum laminate is a metal composite material with excellent mechanical properties, possessing the advantages of magnesium-aluminum alloys. Traditional manufacturing methods for magnesium-aluminum laminates include explosive bonding and diffusion welding. Explosive bonding utilizes the high temperature and impact force generated by an explosive explosion to achieve interfacial bonding. However, limitations in processing conditions lead to difficulties in controlling the laminate shape and uneven bonding interfaces. Diffusion welding uses brazing filler metal to achieve interfacial bonding. The filler metal melts at high temperatures, forming a liquid-phase diffusion connection. However, due to insufficient diffusion of the dissimilar metals, the interfacial bonding strength is relatively low.

[0003] Heterothermal composite technology refers to a special process in which two metal components to be composited are preheated to different temperatures, and then their composite interfaces are brought into contact and composited by applying an external load. Research results show that for two metal components with significantly different thermodynamic properties, heterothermal rolling composite technology not only helps reduce the initial critical reduction rate but also improves the composite strength. Traditional heterothermal composite technology involves heating magnesium alloy and aluminum alloy billets separately in a furnace, holding them at the desired temperature, and then removing them from the furnace for composite rolling. This process is cumbersome, cannot guarantee the initial temperature of the billets, and has relatively large experimental errors. Therefore, there is an urgent need to develop a heterothermal pre-composite device for composite plates that is highly applicable, efficient, and has high control precision. Summary of the Invention

[0004] In view of the above situation, the purpose of this invention is to provide a device for composite magnesium-aluminum laminates with different temperatures, so as to effectively control the plastic deformation capacity of dissimilar metals.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A device for composite magnesium-aluminum laminates under different temperatures is provided. The device structure includes: an upper heating chamber, a lower heating chamber, a press, a temperature control device, a push rod displacement control device, and a heat insulation plate moving device. The upper and lower heating chambers are box structures respectively composed of an upper sealing cover, a lower sealing cover, and a chamber door connected by bolts, with the internal cavity sealed to form a protective space. At the connection position of the upper and lower sealing covers, a heat insulation plate that can move laterally is provided, allowing the left and right sides of the chambers to move. The upper and lower sealing covers are formed into independent heating spaces. The upper and lower sealing covers are made of steel and have a layer of heat insulation material on their outer walls. The thermocouples are installed on the heat insulation material. A heating tube II is provided on the inner wall of the upper sealing cover, and a gas exhaust hole is provided at the upper part of the upper sealing cover, and a gas inlet is provided at the bottom. A heating tube I is provided on the outer wall of the lower sealing cover, and a gas exhaust hole is provided at the upper part of the lower sealing cover, and a gas inlet is provided at the bottom. Temperature control devices are provided on the outside of the upper and lower sealing covers, and the temperature control devices are respectively connected to heating tube I, heating tube II and thermocouples.

[0006] A push rod is vertically inserted into the top of the upper sealing cover, and the top of the push rod is connected to the press head of the press. The bottom of the push rod is connected to a circular flange, and the flange is connected to the upper clamping seat by bolts. The upper clamping seat and the upper clamping block move through a sliding groove. The position of the upper clamping block is fixed by a set screw, so that the upper clamping block can slide left and right to clamp plates of different widths and sizes.

[0007] The lower support seat is fixedly installed on the bottom surface of the lower sealing cover by bolts. The lower support seat and the push rod of the upper sealing cover are vertically aligned. The top of the lower support seat is fixedly connected to the lower pressure seat. The lower clamping block is connected to the lower pressure seat through a sliding groove. The lower clamping block is fixed by passing a set screw through the lower support seat, so that the lower clamping block can slide left and right to clamp plates of different widths and sizes.

[0008] The push rod is inserted vertically into the upper sealing cover. A push rod hole seat is opened at the top of the upper sealing cover. The push rod passes through the push rod hole seat and enters the upper sealing cover. Graphite material is filled inside the push rod hole seat to achieve sealing.

[0009] The composite device is equipped with a displacement sensor, which is mounted on a push rod, and the displacement sensor controller is mounted on a control console outside the housing.

[0010] A base is fixed to the bottom of the lower sealing cover, and a cooling water channel is opened inside the base.

[0011] The gas enters through the gas inlet holes of the upper and lower sealing covers and exits through the gas outlet holes of the upper and lower sealing covers. The gas is argon.

[0012] The heat insulation plate moving device can reciprocate between the left and right boxes to form an upper and lower sealed space. The top of the lower sealing cover is provided with a guide rail, and the bottom of the heat insulation plate is provided with a sliding groove. The guide rail and sliding groove cooperate to realize reciprocating movement. The screw is installed on the left and right sides of the lower sealing cover and supported on the wall of the lower sealing cover. The rotating handle is connected to the screw. A threaded hole is opened on one side of the bottom of the heat insulation plate to cooperate with the screw. The rotation of the screw drives the heat insulation plate to reciprocate.

[0013] The base and the press beam are connected by a base support rod, which supports and fixes the entire device.

[0014] Working process: Preliminary preparation: Select magnesium alloy billets and aluminum alloy billets with the same length and width but different thicknesses. Remove the oxide layer from the surfaces of the magnesium alloy billets and aluminum alloy billets to be bonded and clean them. Raise the left press head to make the push rod rise. Open the box door of the upper and lower sealing covers on the left. Place the aluminum alloy billet at the bottom of the upper clamp. Slide the upper clamping block to clamp the aluminum alloy billet between the upper clamping blocks. Tighten the set screw to fix the upper clamping block. Place the magnesium alloy billet at the top of the lower press seat. Slide the lower clamping block to clamp the magnesium alloy billet between the lower clamping blocks. Tighten the set screw to fix the lower clamping block.

[0015] According to the process requirements, the temperatures of heating tubes I and II are set. The handle is turned to move the heat insulation plate to the left side of the chamber, sealing the upper and lower spaces. The upper and lower chamber doors are closed, and argon gas is introduced. The temperature of the upper and lower sealing covers is monitored and precisely controlled in real time using a temperature monitoring device and thermocouples. After heating the two billets to the set temperatures and holding them for a certain time, heating tubes I and II are closed. The handle is turned to move the heat insulation plate to the right side of the chamber, and the heating process is repeated in the right side chamber. The left-side press is started, and the push rod moves downwards towards the support base. The movement distance is controlled by a displacement sensor, compressing the two metal billets with different initial temperatures to the set reduction amount. At this point, the right-side heating chamber has completed the differential heating. The handle is turned to move the heat insulation plate to the left side of the chamber, and pressure bonding is achieved in the right side chamber. Changing process parameters such as the thickness of the two metals, heating temperature, or deformation reduction amount facilitates the pre-bonding of bimetallic layered composite plates. Efficiency is improved through alternating differential heating and pressure pre-bonding between the left and right chambers.

[0016] Compared with the prior art, the beneficial effects of the present invention are: it can realize the process of multi-parameter process such as pressing amount, heating temperature, and thickness ratio for the pre-composite bonding of bimetallic layered composite plates during the heating process of the plate; the composite device is simple to operate, safe and reliable, and avoids the traditional process of pre-composite heating, material taking and pre-composite bonding. The heating temperature is controllable in real time; the left and right chambers alternate between the pre-composite heating and pressure pre-composite bonding processes, which can be continuously and strongly cyclically, resulting in high production efficiency. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the device of the present invention, which combines heating in the left chamber and pressure in the right chamber;

[0018] Figure 2 This is a schematic diagram of the device of the present invention, which combines pressure compounding in the left chamber and heating in the right chamber;

[0019] Figure 3 This is a schematic diagram of the clamping device of the present invention;

[0020] Figure 4 This is a schematic diagram of the clamping device of the present invention;

[0021] Figure 5 This is a schematic diagram of the heat insulation plate moving device of the present invention;

[0022] In the diagram: 1. Press head; 2. Press beam; 3. Base support rod; 4. Upper sealing cover; 5. Upper clamping block; 6. Upper clamping seat; 7. Lower press seat; 8. Lower sealing cover; 9. Base; 10. Cooling water pipe; 11. Lower support seat; 12. Heating tube I; 13. Lower clamping block; 14. Heat insulation plate; 15. Gas inlet hole; 16. Heating tube II; 17. Gas outlet hole; 18. Push rod hole seat; 19. Push rod; 20. Displacement control device; 21. Temperature control device; 22. Box door; 23. Guide rail; 24. Lead screw; 25. Rotating handle. Detailed Implementation

[0023] The invention will now be further described with reference to the accompanying drawings. Figure 1 , 2 As shown in the schematic diagram of the present invention, the device of the present invention includes an upper heating chamber, a lower heating chamber, a press, a temperature control device, a push rod displacement control device, and a heat insulation plate moving device. The upper and lower heating chambers are box structures composed of an upper sealing cover 4, a lower sealing cover 8, and a box door 22 connected by bolts. The internal cavity is sealed to form a protective space. A movable heat insulation plate 14 is provided between the upper and lower sealing covers, which can form independent heating spaces in the left and right sides of the box. The upper and lower sealing covers are made of steel, and the outer wall is provided with a layer of heat insulation material. Thermocouples are installed on the heat insulation material. A heating tube II 16 is provided on the inner wall of the upper sealing cover, and a gas exhaust hole 17 is provided on the upper part of the side wall of the upper sealing cover 4, and a gas inlet 15 is provided at the bottom of the side wall. A heating tube I 12 is provided on the outer wall of the lower sealing cover 8, and a gas exhaust hole 17 is provided on the upper part of the side wall of the lower sealing cover 8, and a gas inlet hole 15 is provided at the bottom of the side wall. Gas enters from the gas inlet hole 15 of the upper and lower sealing covers and exits from the gas exhaust hole 17 of the upper and lower sealing covers. The gas is argon. Temperature control device 21 is provided on the outside of the upper and lower sealing covers. The temperature control device monitors the temperature of heating tube I12 and heating tube II16 in real time through thermocouples and controls the temperature in real time through heating wires.

[0024] A push rod 19 is vertically inserted into the top of the upper sealing cover 4, and the top of the push rod is connected to the press head 1 of the press. The bottom of the push rod 19 is connected to a circular flange, which is bolted to the upper clamping seat 6. The upper clamping seat 6 and the upper clamping block 5 move through a sliding groove. The position of the upper clamping block is fixed by a set screw, allowing the upper clamping block to slide left and right to clamp plates of different widths. A lower support seat 11 is bolted to the bottom surface inside the lower sealing cover 8. The lower support seat 11 corresponds vertically to the push rod 19 of the upper sealing cover 4. The top of the lower support seat 11 is fixed to the lower pressure seat 7. The lower clamping block 13 is connected to the lower pressure seat 7 through a sliding groove. The lower clamping block 13 is fixed by a set screw passing through the lower support seat 11, allowing the lower clamping block 13 to slide left and right to clamp plates of different widths. A base 9 is fixed to the bottom of the lower sealing cover 8, and a cooling water pipe 10 is opened inside the base 9. The base 9 is connected to the press beam 2 through a base support rod 3, which supports and fixes the entire device.

[0025] The push rod 19 is vertically inserted into the upper sealing cover 4. A push rod hole seat 18 is opened at the top of the upper sealing cover 4. The push rod 19 passes through the push rod hole seat 18 and enters the upper sealing cover 4. Graphite material is filled inside the push rod hole seat 18 to achieve sealing. The displacement sensor is installed on the push rod 19, and the displacement sensor controller is installed on the control console outside the box to form the displacement control device 20.

[0026] The heat insulation plate moving device can move back and forth between the left and right boxes to form an upper and lower sealed space. The top of the lower sealing cover 8 is provided with a guide rail 23, and the bottom of the heat insulation plate 14 is provided with a sliding groove. The guide rail and sliding groove cooperate to realize reciprocating movement. The screw 24 is installed on the left and right sides of the lower sealing cover 8 and supported on the wall of the lower sealing cover 8. The rotating handle 25 is connected to the screw 24. A threaded hole is opened on one side of the bottom of the heat insulation plate 14 to cooperate with the screw 24. The rotation of the screw 24 drives the heat insulation plate 14 to move back and forth along the guide rail 23.

[0027] Select magnesium alloy and aluminum alloy billets with the same length and width but different thicknesses. Remove the oxide layer from the surfaces of the magnesium alloy and aluminum alloy billets to be bonded and clean them. Raise the left press head 1 to raise the push rod 19, open the box door 22 of the left upper and lower sealing covers 4 and 8, place the aluminum alloy billet at the bottom of the upper clamping seat 6, slide the upper clamping block 5 to clamp the aluminum alloy billet between the upper clamping blocks 5, and tighten the set screw to fix the upper clamping block 5. Place the magnesium alloy billet at the top of the lower press seat 7, slide the lower clamping block 13 to clamp the magnesium alloy billet between the lower clamping blocks 13, and tighten the set screw to fix the lower clamping block 13. According to the process requirements, set the temperature of heating tubes I and II, turn the handle 25 to move the heat insulation plate 14 to the position of the left box, so that the upper and lower spaces are sealed and isolated. Close the upper and lower box doors 22 and introduce argon gas. The temperature of the upper and lower sealing covers 4 and 8 is monitored and precisely controlled in real time using temperature monitoring devices and thermocouples. The two billets are heated to the set temperature and held for a certain time. Simultaneously, the sample loading process is repeated in the right-side chamber. After the left-side billet has been held at its set temperature, heating tubes I and II are turned off, and handle 25 is rotated to move the heat insulation plate 14 to the right-side chamber. The heating process is repeated to heat and hold the right-side chamber. The left-side press is started, and push rod 19 moves downwards towards the support base 11. The movement distance is controlled by a displacement sensor, compressing and deforming the two metal billets with different initial temperatures to the set reduction amount. At this point, the right-side heating chamber has completed the differential heating. Rotating handle 25 moves the heat insulation plate 14 to the left-side chamber, achieving pressure bonding in the right-side chamber.

[0028] By changing process parameters such as the thickness of the two metals, heating temperature, or deformation reduction, pre-composite bimetallic laminates can be facilitated, and production efficiency can be improved by alternating different temperature heating and pressure pre-compositeing of the left and right chambers.

[0029] The alternating temperature heating of the left and right chambers and the pressure pre-composite process described above do not have a specific order. The above description only details the preferred embodiments of the present invention; however, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention, and all such changes should be included within the protection scope of the present invention.

Claims

1. A thermochromic pre-composite device for magnesium-aluminum composite panels, characterized in that: The device structure includes an upper heating chamber, a lower heating chamber, a press, a temperature control device, a push rod control device, and a heat insulation plate moving device. The upper and lower heating chambers are box structures composed of an upper sealing cover, a lower sealing cover, and a chamber door connected by bolts, forming a sealed protective space. A guide rail and screw drive assembly is provided between the upper and lower sealing covers, allowing the heat insulation plate to move left and right, creating independent heating spaces on the left or right sides of the chamber. The upper and lower sealing covers are made of steel, with a layer of heat insulation material on the outer wall, and thermocouples are mounted on the insulation material. A heating tube II is located on the inner wall of the upper sealing cover, with a gas exhaust hole at the upper part of the side wall and a gas inlet at the bottom of the side wall. A heating tube I is located on the inner wall of the lower sealing cover, with a gas exhaust hole at the upper part of the side wall and a gas inlet at the bottom of the side wall. A temperature control device is located outside the upper and lower sealing covers, monitoring the temperature of heating tube I and heating tube II in real time via thermocouples and controlling the temperature in real time via heating wires. A push rod is vertically inserted into the top of the upper sealing cover. The top of the push rod passes through the press beam and is connected to the press head of the press. The bottom of the push rod is bolted to a circular flange. The flange is bolted to the upper clamping seat. The upper clamping seat and the upper clamping block move through a sliding groove. The position of the upper clamping block is fixed by a set screw, so that the upper clamping block can slide left and right to clamp plates of different widths and sizes. The lower support seat is fixedly installed on the bottom surface of the lower sealing cover by bolts. The lower support seat and the push rod of the upper sealing cover are vertically aligned. The top of the lower support seat is fixedly connected to the lower pressure seat. The lower clamping block is connected to the lower pressure seat through a sliding groove with clearance fit. The lower clamping block is fixed by passing a set screw through the lower support seat, so that the lower clamping block can slide left and right to clamp plates of different widths and sizes.

2. The magnesium-aluminum composite plate temperature pre-composite device according to claim 1, characterized in that: The composite device is equipped with a displacement sensor, with one end mounted on a push rod and the other end mounted on a control console outside the housing.

3. The magnesium-aluminum composite plate temperature pre-composite device according to claim 1, characterized in that: The heat insulation plate moving device moves back and forth between the left and right heating boxes to form upper and lower sealed spaces. The top of the lower sealing cover is provided with a guide rail, and the bottom of the heat insulation plate is provided with a sliding groove. The guide rail and sliding groove cooperate to realize the reciprocating movement. The screw is installed on the left and right sides of the lower sealing cover and supported on the wall of the lower sealing cover. The rotating handle is connected to the screw. A threaded hole is opened on one side of the bottom of the heat insulation plate to cooperate with the screw. The rotation of the screw drives the heat insulation plate to move back and forth.

4. The magnesium-aluminum composite plate temperature pre-composite device according to claim 1, characterized in that: The top of the upper sealing cover has a push rod hole seat. The push rod passes through the push rod hole seat and enters the upper sealing cover. Graphite material is filled inside the push rod hole seat to achieve a seal.

5. The magnesium-aluminum composite plate temperature pre-composite device according to claim 1, characterized in that: The bottom of the lower sealing cover is fixedly connected to a base, and a cooling water channel is opened inside the base.

6. The magnesium-aluminum composite plate temperature pre-composite device according to claim 1, characterized in that: In the composite device, gas enters through the gas inlet holes of the upper and lower sealing covers and exits through the gas outlet holes of the upper and lower sealing covers; the gas is argon.

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