An apparatus for producing an aluminum matrix composite shell by continuous rapid hot pressing

Abstract

The application belongs to the technical field of continuous production equipment of alloy materials, and particularly discloses a device for producing an aluminum-based composite material shell through continuous rapid hot pressing, which comprises a middle die assembly, a hydraulic assembly, a copper bar assembly and a sample, etc. The device has the beneficial effects that: the middle die is heated from left and right, and upper and lower insulating plates are arranged to avoid the over-heating of upper and lower pressing heads, so that the upper and lower pressing heads do not heat up, which is beneficial to the rapid cooling of the aluminum-based composite material shell after sintering, can shorten the cooling time, and greatly improve the production efficiency; the middle die has a unique H-shaped structure, and when current flows through the middle die, the structure of wide ends and narrow middle part can make more current flow through the narrow area, which is more conducive to the heating of the middle die and meets the rapid heating requirement of the aluminum-based composite material; the floating cross beam is prevented from being electrified when the current flows through the middle die, which can realize the powder loading, sintering and aluminum-based composite material taking out.

Description

TECHNICAL FIELD

[0001] The application belongs to the application technical field of continuous production equipment of alloy materials, and particularly relates to a device for continuously and rapidly hot-pressing producing an aluminum-based composite material shell. BACKGROUND

[0002] The continuous rapid hot-pressing production device has been applied to many material fields such as metal materials, structural ceramic materials, cermet alloys and semiconductors such as thermoelectric materials.

[0003] The high-silicon aluminum alloy aluminum-based composite material prepared by the rapid hot-pressing sintering has excellent performance and strong processability, and can maintain the excellent performance of silicon and aluminum respectively, that is, good thermal conductivity, high thermal expansion coefficient, light weight and high stiffness, and is widely applied in high-tech fields such as aerospace, space technology and portable electronic devices, among which the aluminum-based composite material shell has been widely applied in the field of electronic components and integrated circuit packaging, and thus the demand for the production of the aluminum-based composite material shell is huge.

[0004] Therefore, the current focus is to rapidly, continuously, efficiently and stably prepare the aluminum-based composite material shell, and the continuous rapid hot-pressing sintering device is tested for efficiently producing the aluminum-based composite material shell.

[0005] The current continuous rapid hot-pressing sintering device has the following shortcomings:

[0006] 1. The sintering and heating sintering process of the aluminum-based composite material shell can be rapidly completed, but the upper and lower pressing heads of the device also have current passing therethrough to generate heat during the heating process, and the cooling process lasts for a long time, which greatly limits the production efficiency. In addition, the electric heating conversion energy loss of the pressing head is large, and the unnecessary cost of industrialized production of the aluminum-based composite material shell is increased.

[0007] 2. The mold loaded with pre-sintered powder of the conventional continuous rapid hot-pressing sintering device is separated from the device, and the mold needs to be moved to the demolding machine after the cooling ends to take out the sample.

[0008] Therefore, based on the above problems, the application provides a device for continuously and rapidly hot-pressing producing an aluminum-based composite material shell. SUMMARY

[0009] The application aims to provide a device for continuously and rapidly hot-pressing producing an aluminum-based composite material shell, and solves the technical problems existing in the sintering of the aluminum-based composite material shell in the background art.

[0010] Technical solution: The device for producing aluminum-based composite material shell by continuous rapid hot pressing of the application, including middle die assembly, hydraulic assembly, copper bar assembly and sample, the middle die assembly, including middle die, and the middle die through groove arranged in the center line of symmetry of middle die, and symmetrically arranged in the middle die both ends, and located in the middle die through groove both sides of the middle insulation sleeve, and respectively arranged in the middle insulation sleeve both ends of the circular insulation sleeve, the hydraulic assembly, including floating beam, and the oil cylinder arranged in the upper part of floating beam, the lower part of the pressure head fixed seat, and the upper pressure head arranged in the upper part of floating beam, and connected with the oil cylinder, and the lower pressure head connecting plate arranged on the pressure head fixed seat, and the upper insulation plate arranged on the upper pressure head, and the lower insulation plate arranged on one side of the lower pressure head connecting plate, and the upper pressure head connecting plate arranged on one side of the upper insulation plate, and the lower pressure head arranged on the lower insulation plate, the copper bar assembly, including the first copper bar lead-out part, the second copper bar lead-out part, and the copper bar insulation plate arranged on the first copper bar lead-out part and the second copper bar lead-out part, wherein the middle die is connected with the floating beam through the middle insulation sleeve and the circular insulation sleeve, the first copper bar lead-out part and the second copper bar lead-out part are installed at both ends of the middle die, the sample is located in the middle die through groove of the middle die, and the oil cylinder drives the upper pressure head to cooperate with the lower pressure head to continuously hot press the sample in the middle die through groove.

[0011] The device for producing aluminum-based composite material shell by continuous rapid hot pressing of the application, further comprising a plurality of first pins and a plurality of second pins for fixing and installing the first copper bar lead-out part and the second copper bar lead-out part on the outer wall of the middle die.

[0012] The middle insulation sleeve is arranged in a cylindrical structure, and the circular insulation sleeve is arranged in a circular plate structure, wherein the diameter of the circular insulation sleeve is larger than the size of the middle insulation sleeve, and the middle insulation sleeve and the circular insulation sleeve are used to separate the middle die from the floating beam.

[0013] The middle die is in an I-shaped structure, and the middle die through groove is in a quadrilateral structure or a circular structure, wherein the size of the upper pressure head and the lower pressure head is the same, and smaller than the middle die through groove, and the material of the middle die includes but is not limited to H13 steel.

[0014] The diameter of the upper insulation plate and the upper pressure head connecting plate is the same, and the diameter of the lower pressure head connecting plate and the lower insulation plate is the same, wherein the diameter of the upper insulation plate and the upper pressure head connecting plate is larger than the diameter of the lower pressure head connecting plate or the lower insulation plate.

[0015] Compared with the prior art, the device for producing aluminum-based composite material shell by continuous rapid hot pressing of the application has the following advantages:

[0016] 1. Unlike the current flow through the upper die head, the middle die and the lower die head of the conventional rapid hot pressing device, the continuous rapid hot pressing device for producing aluminum matrix composite shell adopts the mode of passing electricity from the left and right of the middle die, and upper and lower insulation plates are arranged at the end of the upper die head and the bottom of the lower die head of the hydraulic assembly respectively, so as to avoid the phenomenon of overvoltage of the upper die head and the lower die head, and the upper die head and the lower die head will not heat up, which is beneficial to the rapid cooling of the aluminum matrix composite shell after sintering, can shorten the cooling time, and greatly improve the production efficiency;

[0017] 2. The continuous rapid hot pressing device for producing aluminum matrix composite shell designs the middle die as a part of the device, and the middle die has a unique I-shaped structure, and the material of the middle die is H13 steel. When the current flows through the middle die, the structure of the two ends being wide and the middle being narrow will make more current flow through the narrow area, which is more conducive to heating the middle die and meets the rapid heating requirement of the aluminum matrix composite material.

[0018] 3. The continuous rapid hot pressing device for producing aluminum matrix composite shell is provided with a floating beam, the floating beam is connected with the middle die through a middle insulation sleeve and a circular insulation sleeve, which can effectively prevent the floating beam from being electrified when the current flows through the middle die, the floating beam is connected with a power device and can bear the movement of the middle die, the middle die groove of the middle die is very convenient for loading pre-sintered powder, after sintering, the floating beam can be moved downward to take out the aluminum matrix composite product, and further processing can be carried out to form the required shell, so that the powder loading, sintering and aluminum matrix composite taking out can be realized on the device. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 is a front view structural schematic diagram of a device for continuously and rapidly hot pressing aluminum matrix composite shell of the present application;

[0021] Figure 2a is a front view structural schematic diagram of the middle die, the middle die through slot and the like;

[0022] Figure 2b is a top view structural schematic diagram of the middle die, the middle die through slot and the like;

[0023] Figure 3 is a front view structural schematic diagram of the upper die head, the upper insulation plate and the upper die head connecting plate;

[0024] Figure 4 is a front view structural schematic diagram of the die head fixing seat, the lower die head connecting plate, the lower insulation plate and the lower die head;

[0025] In the figure, the numbers are as follows: 1-oil cylinder, 2-upper press head connecting plate, 3-upper insulation plate, 4-middle die, 41-middle die through slot, 5-upper press head, 6-sample, 7-floating cross beam, 8-lower press head, 9-lower insulation plate, 10-lower press head connecting plate, 11-press head fixing seat, 12-first copper bar leading-out part, 13-second copper bar leading-out part, 14-copper bar insulation plate, 15-middle insulation sleeve, 16-circular insulation sleeve, 17-first pin, 18-second pin. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment one

[0028] As Figure 1 , Figure 2a, Figure 2b , Figure 3 and Figure 4 indicated in the drawings, a device for continuous rapid hot pressing production of aluminum matrix composite shell, comprising a middle die assembly, a hydraulic assembly, a copper bar assembly and a sample 6,

[0029] The middle die assembly comprises a middle die 4, a middle die through slot 41 arranged in the center line of the middle die 4, and a middle insulation sleeve 15 arranged symmetrically at both ends of the middle die 4 and located on both sides of the middle die through slot 41, and a circular insulation sleeve 16 arranged at both ends of the middle insulation sleeve 15 respectively;

[0030] The hydraulic assembly comprises a floating beam 7, an oil cylinder 1 arranged at the upper part of the floating beam 7, a pressure head fixing seat 11 arranged at the lower part of the floating beam 7, an upper pressure head 5 arranged at the upper part of the floating beam 7 and connected with the oil cylinder 1, a lower pressure head connecting plate 10 arranged on the pressure head fixing seat 11, an upper insulation plate 3 arranged on the upper pressure head 5, a lower insulation plate 9 arranged on one side of the lower pressure head connecting plate 10, an upper pressure head connecting plate 2 arranged on one side of the upper insulation plate 3, and a lower pressure head 8 arranged on the lower insulation plate 9;

[0031] The copper bar assembly comprises a first copper bar leading-out part 12, a second copper bar leading-out part 13, and a copper bar insulation plate 14 arranged on the first copper bar leading-out part 12 and the second copper bar leading-out part 13;

[0032] The middle die 4 is connected with the floating beam 7 through the middle insulation sleeve 15 and the circular insulation sleeve 16, the first copper bar leading-out part 12 and the second copper bar leading-out part 13 are installed at both ends of the middle die 4, the sample 6 is located in the middle die through slot 41 of the middle die 4, and the oil cylinder 1 drives the upper pressure head 5 to cooperate with the lower pressure head 8 to continuously heat-press the sample 6 in the middle die through slot 41. Embodiment two

[0033] On the basis of the embodiment one, the device for continuously and rapidly heat-pressing the aluminum-based composite material shell further comprises a plurality of first pins 17 and a plurality of second pins 18 for fixedly installing the first copper bar leading-out part 12 and the second copper bar leading-out part 13 on the outer walls of both ends of the middle die 4, so as to realize the detachable and convenient assembly or maintenance of the middle die 4 and the first copper bar leading-out part 12 and the second copper bar leading-out part 13. The pin holes in the end faces of both ends of the middle die 4 are not marked, which does not affect the disclosure of the technical scheme of the present application.

[0034] The first pin 17 and the second pin 18 are ceramic pins, such as zirconia ceramic pins, which are high-temperature resistant, oxidation resistant, good in insulation, long in service life, and safe and reliable in use.

[0035] In addition, the middle insulation sleeve 15 is preferably arranged in a cylindrical structure, and the circular insulation sleeve 16 is arranged in a circular plate structure. The diameter of the circular insulation sleeve 16 is larger than the size of the middle insulation sleeve 15. The middle insulation sleeve 15 and the circular insulation sleeve 16 are used to separate the middle die 4 from the floating beam 7, so as to prevent heat transfer.

[0036] In addition, the preferred middle die 4 is an I-shaped structure (a structure with a wide end and a narrow middle will make the narrower area flow more current, which is more conducive to heating the middle die and meets the rapid heating requirements of the aluminum-based composite material), and the middle die through groove 41 is in a quadrilateral structure or a circular structure; wherein the upper pressing head 5 and the lower pressing head 8 are the same size and are smaller than the middle die through groove 41, and the middle die 4 and the middle die through groove 41 are integrally formed, including but not limited to H13 steel material, which is strong and has a long service life.

[0037] In addition, the preferred upper insulation plate 3 and the upper pressing head connecting plate 2 have the same diameter, and the lower pressing head connecting plate 10 and the lower insulation plate 9 have the same diameter; wherein the diameter of the upper insulation plate 3 and the upper pressing head connecting plate 2 is larger than the diameter of the lower pressing head connecting plate 10 or the lower insulation plate 9, respectively. The use of the above-mentioned cooperatively designed upper insulation plate 3 and lower insulation plate 9 avoids the phenomenon of overcurrent of the upper pressing head and the lower pressing head, and the upper pressing head and the lower pressing head do not heat up, which is conducive to the rapid cooling of the aluminum-based composite material shell after sintering is completed.

[0038] The structure principle or working principle of the device for continuously and rapidly hot-pressing production of an aluminum-based composite material shell of the present structure is as follows:

[0039] The middle die 4 is connected with the floating cross beam 7 through the cooperatively matched middle insulation sleeve 15 and the circular insulation sleeve 16, and the floating cross beam 7 bears the middle die 4 to move downward relative to the lower pressing head 8 to abut against the lower end of the middle die 4. The lower pressing head connecting plate 10 and the pressing head fixing seat 11 are connected with the lower pressing head 8 to support and fix the lower pressing head 8.

[0040] The sample 6 (powder) can be uniformly placed in the middle die through groove 41 of the middle die 4 (the lower pressing head 8 is located behind the middle die through groove 41, and the sample 6 (powder) can be uniformly located on the lower pressing head 8),

[0041] The hydraulic device oil cylinder 1 is connected with the upper pressing head 5 through the pressing head connecting plate and provides driving force to make it move downward relative to the middle die 4 above the middle die through groove 41. At this time, the upper pressing head 5 continuously presses downward in cooperation with the lower pressing head 8 to compact the sample 6 (powder) on the lower pressing head 8 in the middle die through groove 41.

[0042] In addition, the first copper bar lead-out part 12 and the second copper bar lead-out part 13 connect the positive and negative electrodes of the power supply with the two side end portions of the middle die to form a closed loop, and a copper bar insulation plate 14 is arranged between the first copper bar lead-out part 12 and the second copper bar lead-out part 13 to prevent short circuit of the power supply; wherein, different from conventional rapid hot-pressing sintering devices, the present device adopts a left-right power input mode, and the current flow direction is power supply positive electrode, first copper bar lead-out part 12, middle die 4 and sample 6 (powder), second copper bar lead-out part 13, and power supply negative electrode. The path of the current flowing through the closed loop of the device is relatively short.

[0043] In addition, when the middle die 4 has current passing through, the matching use of the middle insulation sleeve 15 and the circular insulation sleeve 16 can prevent the safety hazard caused by the electrification of the floating beam 7 and the device.

[0044] In addition, the upper insulation plate 3 is connected to the top of the upper press head 5, and the lower insulation plate 9 is connected to the bottom of the lower press head 8. When the closed loop current flows from the left side of the device to the right side (or from the right side to the left side) through the middle die, the special I-shaped die structure can have a larger current passing through the unit cross-sectional area near the square hole, realize the rapid heating of the middle die 4 loaded with the powder, and meet the sintering requirements. At the same time, the upper insulation plate 3 and the lower insulation plate 9 can avoid the current flowing through the upper press head 5 and the lower press head 8, avoid the invalid heating of the upper and lower press heads, effectively reduce the overall heating of the device, shorten the cooling time of the aluminum matrix composite shell, and improve the energy utilization efficiency.

[0045] In addition, after the middle die 4 loaded with the aluminum matrix composite sample is cooled, the upper press head 5 is driven by the connected hydraulic device oil cylinder 1 to separate from the middle die 4, the floating beam 7 bears the middle die 4 to move downward, and the aluminum matrix composite sample is taken out by the pushing of the lower press head 8.

[0046] It should be noted that in the present text, terms such as "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device that includes the element.

[0047] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An apparatus for continuous rapid hot pressing production of aluminum-based composite material shells, comprising a middle mold assembly, a hydraulic assembly, a copper busbar assembly, and a sample (6), characterized in that: The middle mold assembly includes a middle mold (4), a middle mold through groove (41) disposed within the symmetrical center line of the middle mold (4), a middle insulating sleeve (15) symmetrically disposed at both ends of the middle mold (4) and located on both sides of the middle mold through groove (41), and a circular insulating sleeve (16) disposed at both ends of the middle insulating sleeve (15). The hydraulic assembly includes a floating beam (7), an oil cylinder (1) disposed on the upper part of the floating beam (7), a pressure head fixing seat (11) disposed on the lower part, an upper pressure head (5) disposed on the upper part of the floating beam (7) and connected to the oil cylinder (1), a lower pressure head connecting plate (10) disposed on the pressure head fixing seat (11), an upper insulating plate (3) disposed on the upper pressure head (5), a lower insulating plate (9) disposed on one side of the lower pressure head connecting plate (10), an upper pressure head connecting plate (2) disposed on one side of the upper insulating plate (3), and a lower pressure head (8) disposed on the lower insulating plate (9). The copper busbar assembly includes a first copper busbar lead-out section (12), a second copper busbar lead-out section (13), and copper busbar insulating plates (14) disposed on the first copper busbar lead-out section (12) and the second copper busbar lead-out section (13); wherein, the middle mold (4) and the floating crossbeam (7) are connected by a middle insulating sleeve (15) and a circular insulating sleeve (16), the first copper busbar lead-out section (12) and the second copper busbar lead-out section (13) are installed at both ends of the middle mold (4), the sample (6) is located in the middle mold through groove (41) of the middle mold (4), and the hydraulic cylinder (1) drives the upper pressure head (5) and the lower pressure head (5) to engage with the lower pressure head. The pressure head (8) works together to continuously heat press the sample (6) in the middle mold through groove (41); the first copper busbar lead-out part (12) and the second copper busbar lead-out part (13) connect the positive and negative electrodes of the power supply to the two ends of the middle mold (4) to form a closed loop. The copper busbar insulating plate (14) between the first copper busbar lead-out part (12) and the second copper busbar lead-out part (13) prevents the power supply from short-circuiting. The power is supplied from left and right. The current flows from the positive terminal of the power supply, the first copper busbar lead-out part (12), the middle mold (4) and the sample (6), the second copper busbar lead-out part (13), and the negative terminal of the power supply.

2. The apparatus for continuous rapid hot pressing production of aluminum-based composite material shells according to claim 1, characterized in that: The apparatus for continuous rapid hot pressing to produce aluminum-based composite material shells further includes a number of first pins (17) and a number of second pins (18) that fix the first copper busbar lead-out part (12) and the second copper busbar lead-out part (13) on the outer walls of both ends of the middle mold (4); wherein the first pins (17) and the second pins (18) are ceramic pins.

3. The apparatus for continuous rapid hot pressing production of aluminum-based composite material shells according to claim 1, characterized in that: The middle insulating sleeve (15) is configured as a cylindrical structure, and the circular insulating sleeve (16) is configured as a circular plate structure; wherein, the diameter of the circular insulating sleeve (16) is larger than that of the middle insulating sleeve (15).

4. The apparatus for continuous rapid hot pressing production of aluminum-based composite material shells according to claim 1, characterized in that: The middle mold (4) is an I-shaped structure, wide at both ends and narrow in the middle, and the middle mold through groove (41) is set as a quadrilateral structure or a circular structure; wherein, the upper pressure head (5) and the lower pressure head (8) are the same size and are smaller than the middle mold through groove (41), and the material of the middle mold (4) includes H13 steel.

5. The apparatus for continuous rapid hot pressing production of aluminum-based composite material shells according to claim 1, characterized in that: The upper insulating plate (3) and the upper pressure head connecting plate (2) have the same diameter, and the lower pressure head connecting plate (10) and the lower insulating plate (9) have the same diameter; wherein, the diameter of the upper insulating plate (3) and the upper pressure head connecting plate (2) is larger than the diameter of the lower pressure head connecting plate (10) or the lower insulating plate (9), respectively.

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