CN110756799A - A kind of foam aluminum foam precursor molding preparation device - Google Patents

Abstract

The invention discloses a molding preparation device for a foamed aluminum foamed precursor, comprising an upper punch, an inner sleeve, an outer sleeve and a lower punch, the inner sleeve is arranged in the outer sleeve, and the inner sleeve and the outer sleeve are arranged in the Between the upper punch and the lower punch, the outer sleeve is provided with a cylindrical structure, and the inner sleeve is provided with an inner groove that is shaped to match the cross-section of the precursor; the upper punch is provided with an upper die portion , the cross-sectional shape of the upper mold part is matched with the inner groove, and the upper mold part can be arranged in the inner groove; the foamed aluminum foam precursor molding preparation device of the present invention specifically overcomes the traditional molding Difficulty in demolding, the shape and size of the prepared precursor are limited.

Description

A kind of foam aluminum foam precursor molding preparation device

technical field

The invention relates to the technical field of aluminum foam powder metallurgy preparation, in particular to a device for preparing a foamed aluminum foam precursor by molding.

Background technique

Foamed aluminum is a porous structural functional material with excellent physical and mechanical properties, such as light weight, energy absorption, shock absorption, cushioning, sound insulation and sound absorption, heat insulation, electromagnetic shielding, etc. Functional integration and other performance requirements, meet the requirements of future aerospace, automobile manufacturing, rail transit and other fields for structural functional materials, and have broad development and application prospects.

When preparing foamed aluminum by powder metallurgy, the foamed aluminum foam precursor for direct foaming can generally be prepared by molding; when metal panels are added at both ends of the powder for molding and pressing together with the central powder, a foamed aluminum sandwich structure can be obtained. foam precursor. During the molding preparation process of the foaming precursor, the powder raw material and the inner wall of the mold metal are prone to pressure bonding, especially during hot pressing, the bonding force between the powder raw material and the inner wall is stronger, which makes it difficult to demold the foaming precursor. The die operation results in a reduction in the density of the foamed precursor.

In view of the above-mentioned defects, the creator of the present invention finally obtained the present invention after a long period of research and practice.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical defects, the technical solution adopted in the present invention is to provide a foamed aluminum foam precursor molding preparation device comprising an upper punch, an inner sleeve, an outer sleeve and a lower punch, and the inner sleeve is arranged in the outer sleeve. , the inner sleeve and the outer sleeve are arranged between the upper punch and the lower punch, the outer sleeve is configured as a cylindrical structure, and the inner sleeve is provided with an inner sleeve that is shaped to match the cross-section of the precursor. The upper punch is provided with an upper die part, the cross-sectional shape of the upper die part is matched with the inner groove, and the upper die part can be arranged in the inner groove.

Preferably, the outer sleeve is provided with a molding cavity and a limiting cavity, the cross sections of the molding cavity and the limiting cavity are both set to be circular, and the diameter of the molding cavity is smaller than the diameter of the limiting cavity, and the inner sleeve is arranged in the moulding cavity, the moulding cavity is arranged on the side close to the upper punch, and the restriction cavity is arranged at the side close to the lower punch.

Preferably, the lower punch is provided with a lower die part and a restricting part, the lower die part is set to a cylindrical structure, the diameter of the lower die part and the diameter of the restricting cavity are matched and set, and the lower die part is set in a coordinated manner. The mold part may be arranged in the restriction cavity, and the restriction part is arranged in cooperation with the lower end surface of the outer casing.

Preferably, the height dimension of the lower mold portion is equal to or smaller than the depth dimension of the limiting cavity.

Preferably, the upper punch is further provided with a demolding portion, the demolding portion is set to be circular, and the diameter of the demolding portion is smaller than the diameter of the molding cavity.

Preferably, the inner sleeve includes a plurality of splicing blocks, the splicing blocks are connected to each other to form a ring, and are placed in the molding cavity, the splicing blocks are all columnar structures, and the upper and lower ends of the splicing block are provided. The upper end surface of the splicing block is in contact and connection with the end surface of the demolding part, and the lower end surface of the splicing block is in contact and connection with the end surface of the lower mold part.

Preferably, the side end surface of the splicing block includes a forming surface, a fixing surface, and connecting surfaces respectively arranged on both sides of the forming surface and the fixing surface; the connecting surfaces on the two splicing blocks correspond one-to-one. For fitting connection, the fixing surface is set as an arc surface, and the arc radius of the fixing surface and the cross-sectional radius of the molding cavity are matched and set, and the molding surface of the splicing block forms the inner groove.

Preferably, the inner sleeve is further provided with a thickness adjusting block whose outer shape is consistent with the cross-sectional shape of the inner groove.

Compared with the prior art, the beneficial effect of the present invention is that: the device for preparing the foamed aluminum foam precursor by molding of the present invention specifically overcomes the limitations of traditional molding and demoulding, and the shape and size of the prepared precursor are single.

Description of drawings

Fig. 1 is the structural view of described foam aluminum foam precursor molding preparation device;

Fig. 2 is the operation flow schematic diagram of described foam aluminum foam precursor molding preparation device;

Figure 3 is a physical view of foamed aluminum before and after foaming.

The numbers in the figure represent:

10-upper punch; 20-inner sleeve; 30-jacket; 40-lower punch; 210-circular inner groove splicing block; 220-triangular inner groove splicing block; 230-thickness adjusting block.

Detailed ways

The above and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

Example 1

As shown in FIG. 1, FIG. 1 is a structural view of the foamed aluminum foam precursor molding preparation device; the foamed aluminum foam precursor molding preparation device of the present invention includes an upper punch 10, an inner sleeve 20, an outer sleeve 30, Lower punch 40. The inner sleeve 20 is arranged in the outer sleeve 30, the inner sleeve 20 and the outer sleeve 30 are arranged between the upper punch 10 and the lower punch 40, and the outer sleeve 30 is arranged in a cylindrical structure , the inner sleeve 20 is provided with an inner groove which is shaped to fit with the cross-section of the precursor.

Preferably, the outer casing 30 is provided with a molding cavity and a limiting cavity, the cross-sections of the molding cavity and the limiting cavity are both set to be circular, and the diameter of the molding cavity is smaller than the diameter of the limiting cavity, and the inner diameter is smaller than that of the limiting cavity. The sleeve 20 is arranged in the molding cavity, the molding cavity is arranged on the side close to the upper punch 10 , and the limiting cavity is arranged on the side close to the lower punch 40 .

The lower punch 40 is provided with a lower die part and a restricting part, the lower die part is set as a cylindrical structure, the diameter of the lower die part and the diameter of the restricting cavity are matched and arranged, and the lower die part can be arranged. It is arranged in the restriction cavity, and the restriction part is arranged in cooperation with the lower end surface of the outer casing 30. When the lower mold part is arranged in the restriction cavity, the restriction part and the lower end surface of the outer sleeve 30 snapping, thereby fixing the position of the lower mold part in the limiting cavity.

Generally, the height dimension of the lower die portion is equal to or slightly smaller than the depth dimension of the confinement cavity.

The upper punch 10 is provided with an upper die part and a demolding part, the cross-sectional shape of the upper die part is matched with the inner groove, and the upper die part can be arranged in the inner groove. The demolding portion is generally set in a circular shape, and the diameter of the demolding portion is slightly smaller than the diameter of the molding cavity, so as to facilitate the extrusion of the inner sleeve 20 by the demolding portion, so that the inner sleeve 20 can be squeezed. Squeeze out from the casing 30 .

The inner sleeve 20 includes a plurality of splicing blocks, the splicing blocks are connected to each other to form a ring, and are placed in the molding cavity, the splicing blocks are all columnar structures, and the upper and lower ends of the splicing block are set as flat surfaces. , the upper end surface of the splicing block is in contact and connection with the end surface of the demolding part, and the lower end surface of the splicing block is in contact and connection with the end surface of the lower mold part.

The side end surface of the splicing block includes a forming surface, a fixing surface, and connecting surfaces respectively arranged on both sides of the forming surface and the fixing surface. The connecting surfaces on the two splicing blocks are attached and connected in a one-to-one correspondence, that is, one of the splicing blocks is attached and connected with the splicing blocks on the adjacent two sides through the connecting surface. If the splicing blocks are only provided with There are two, and the connecting surfaces on the two splicing blocks are connected in a one-to-one correspondence. The fixed surface is set as a circular arc surface, and the circular arc radius of the fixed surface and the cross-sectional radius of the molding cavity are set in coordination. After the splicing blocks are connected to each other, the fixed surface forms a complete circular arc surface. Fitting with the inner wall of the molding cavity, thereby fixing the position of each of the splicing blocks through the molding cavity. The forming surface of the splicing block forms the inner groove, the forming surface is the surface directly in contact with the powder raw material, and the ideal shape is finally formed by the mutual extrusion of the forming surface and the powder raw material Precursor. The required inner grooves of different shapes are formed by arranging the molding surfaces of different shapes and splicing the molding surfaces with each other.

The inner sleeve 20 is designed to facilitate the demoulding of the precursor; when it is set in different shapes, that is, a set of square, circular inner groove splicing blocks 210 or triangular inner groove splicing blocks 220, the outer shape can be prepared Different precursors are used to facilitate the subsequent filling and foaming of various special-shaped parts.

In addition, the pressing thickness of the precursor can be controlled by adding a thickness adjusting block 230 in the inner sleeve 20 with the shape consistent with the cross-sectional shape of the inner groove.

As shown in FIG. 2 , FIG. 2 is a schematic diagram of the operation flow of the device for preparing the foamed aluminum foam precursor by molding. As shown in the upper part (a) of FIG. 2 , which is a schematic diagram of the pressing process of the foamed aluminum foam precursor, the punch 10 , the inner sleeve 20 , the outer sleeve 30 , the lower punch 40 is assembled from bottom to top. When the thickness of the prepared precursor needs to be controlled, the thickness adjustment block 230 with a certain thickness is first placed in the inner sleeve 20, and then the precursor powder raw material is added. When the inner sleeve 20 and the upper end face of the outer sleeve 30 are on the same plane; in addition, to obtain the foamed aluminum sandwich structure foaming precursor, after placing the thickness adjustment block 230, first Put a metal panel on the thickness adjustment block 230, and then add powder raw materials. Similarly, when the powder is added to the same plane as the upper end surface of the inner sleeve 20 and the outer sleeve 30, another block is placed on the powder. Metal panel; after completing the filling operation, gently press the upper punch 10 into the inner sleeve 20 filled with the material, and finally place the entire set of molding devices under the pressure equipment to perform the pressing operation.

As shown in (b) of Figure 2, Figure (b) is a schematic diagram of the demoulding process of the foamed aluminum foam precursor. After the pressing is completed, the upper punch 10 and the lower punch 40 are taken out at the same time, and the The upper punch 10 is inverted so that the demolding part is placed on the inner sleeve 20, and then the device is placed under the pressure equipment, and the pressure is slowly applied until the inner sleeve 20 completely comes out of the outer sleeve 30, and the stripping is completed. mode operation.

As shown in Fig. 3, Fig. 3 is a physical view of the foamed aluminum before and after foaming. Wherein, the top (a) of FIG. 3 is the actual picture of the foamed aluminum sandwich structure foaming precursor prepared by the foamed aluminum foam precursor molding preparation device, and the top (b) of FIG. 3 is the actual picture of the foamed aluminum.

The molding preparation device of the foamed aluminum foamed precursor of the invention has high integration degree and outstanding modularity, and is suitable for the preparation of the foamed precursor of the special-shaped aluminum foamed filler.

The above descriptions are only preferred embodiments of the present invention, which are merely illustrative rather than limiting for the present invention. Those skilled in the art understand that many changes, modifications and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all fall within the protection scope of the present invention.

Claims (8)

1. A foam aluminum foaming precursor molding preparation device, characterized in that, comprising an upper punch, an inner sleeve, an outer sleeve, a lower punch, the inner sleeve is arranged in the outer sleeve, the inner sleeve and the The outer sleeve is arranged between the upper punch and the lower punch, the outer sleeve is configured as a cylindrical structure, and the inner sleeve is provided with an inner groove that is shaped to match the shape of the cross section of the precursor; the upper punch is provided with There is an upper mold part, the cross-sectional shape of the upper mold part is matched with the inner groove, and the upper mold part can be arranged in the inner groove. 2 . The device for preparing foamed aluminum foam precursor by molding according to claim 1 , wherein a molding cavity and a limiting cavity are provided in the outer jacket, and the cross-sections of the molding cavity and the limiting cavity are both set to be circular. 3 . shape, and the diameter of the molding cavity is smaller than the diameter of the limiting cavity, the inner sleeve is arranged in the molding cavity, the molding cavity is arranged on the side close to the upper punch, and the limiting cavity is arranged close to the upper punch. one side of the lower punch. 3 . The device for preparing foamed aluminum foam precursor by molding according to claim 2 , wherein the lower punch is provided with a lower die portion and a restricting portion, and the lower die portion is provided with a cylindrical structure, and the The diameter of the lower mold part is matched with the diameter of the restriction cavity, and the lower mold part can be arranged in the restriction cavity, and the restriction part is arranged in cooperation with the lower end surface of the outer casing. 4 . The device for producing foamed aluminum foam precursors by molding according to claim 3 , wherein the height dimension of the lower mold portion is equal to or smaller than the depth dimension of the confinement cavity. 5 . 5 . The device for preparing foamed aluminum foam precursor by molding according to claim 2 , wherein the upper punch is further provided with a demolding portion, the demolding portion is set to be circular, and the demolding portion is provided with a circular shape. 6 . The diameter is smaller than the die cavity diameter. 6. The device for preparing foamed aluminum foam precursor by molding according to claim 2, wherein the inner sleeve comprises a plurality of splicing blocks, the splicing blocks are connected to each other to form a ring, and are placed in the molding cavity, The splicing blocks are all columnar structures, the upper and lower end surfaces of the splicing block are set as flat surfaces, the upper end surface of the splicing block is in contact with the end surface of the demolding part, and the lower end surface of the splicing block is connected to the lower mold. The end face of the part is in contact with the connection. 7 . The device for preparing foamed aluminum foam precursor by molding according to claim 6 , wherein the side end face of the splicing block comprises a molding surface and a fixing surface, which are respectively arranged on both sides of the molding surface and the fixing surface. 8 . The connecting surfaces on the two splicing blocks are connected by one-to-one correspondence, the fixing surface is set as an arc surface, and the arc radius of the fixing surface and the cross-sectional radius of the molding cavity are In matching arrangement, the forming surface of the splicing block forms the inner groove. 8 . The device for preparing foamed aluminum foam precursor by molding according to claim 1 , wherein the inner sleeve is further provided with a thickness adjusting block whose appearance is consistent with the cross-sectional shape of the inner groove. 9 .

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