CN202045262U - Forming mold with edge pressing and sealing structure - Google Patents

Abstract

The utility model discloses a forming mold with a blank holder and a sealing structure, comprising an upper mold body fixed on an upper mold base and a lower mold body fixed on a lower mold base, and the upper mold body (or lower mold body) A sealing ring and a blank holder are arranged around the profile surface, and gas passages are respectively provided on the upper mold body and the lower mold body. The utility model integrates the pressing edge and the sealing function, combines the two processes of stamping and inflation, realizes the continuous completion of stamping and inflation forming in one mold structure, avoids the replacement of molds by different processes, improves the precision of parts, and reduces the number of molds cost and increased production efficiency.

Description

Forming die with blank holder and sealing structure

technical field

The utility model relates to a hot stamping and superplastic inflation forming die structure, in particular to a forming die with a blank holder and a sealing structure.

Background technique

In recent years, in order to continuously improve the lightweight effect of vehicle bodies (such as automobiles, trains, airplanes, ships, etc.), it is one of the current important development trends to use aluminum alloy plates instead of steel plates to manufacture body panels.

In the prior art, conventional cold stamping technology and superplastic forming technology are mostly used for the forming of aluminum alloy body parts. Aluminum alloys have low plasticity and low elastic modulus at room temperature, which leads to the defects of large springback, easy distortion, and easy cracking of aluminum alloy automotive panels formed by cold stamping, and the yield rate is low. The traditional superplastic forming technology is required to be carried out at a very low strain rate, and the production efficiency is very low, which cannot meet the requirements of mass production.

Contents of the invention

The purpose of the utility model is to provide a forming mold with high precision, low cost and high production efficiency with blank holder and sealing structure.

The purpose of this utility model is achieved by the following technical solutions:

The forming mold with a blank holder and a sealing structure of the utility model comprises an upper mold body fixed on the upper mold base and a lower mold body fixed on the lower mold base, and the upper mold body (or the lower mold body) is shaped like The periphery of the surface is provided with a sealing ring and a blank holder, and the upper mold body and the lower mold body are respectively provided with gas passages.

It can be seen from the technical solution provided by the above-mentioned utility model that the forming mold with a blank holder and a sealing structure provided by the embodiment of the utility model has both a blank holder and a sealing structure, and integrates the functions of a blank holder and a seal. Combining the two processes of stamping and inflation, the stamping and inflation forming can be completed continuously in one mold structure, which avoids changing molds with different processes, improves the precision of parts, reduces mold costs, and improves production efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained based on these drawings without creative work.

The structural representation of the forming mold with blank holder and sealing structure provided by the specific embodiment of the utility model of Fig. 1;

The schematic diagram when Fig. 2 the utility model crimping;

Fig. 3 is the schematic diagram when the hot stamping of the utility model ends;

Fig. 4 is a schematic diagram of the end of superplastic inflation of the utility model.

In the figure: 1. Upper die base, 2. Upper die body, 3. Sealing ring, 4. Upper die heating ring outer suspension ring support, 5. Air intake pipe, 6. Upper die heating ring outer suspension ring, 7. Upper die Heating ring, 8, insulation cover, 9, connecting rod, 10, spring, 11, blank holder ring, 12, lower mold seat, 13, lower mold body, 14, air outlet pipe, 15, lower mold heating ring, 16, aluminum Alloy sheet.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

A forming die with a blank holder and a sealing structure of the utility model, its preferred specific embodiment is that it includes an upper mold body fixed on the upper mold base and a lower mold body fixed on the lower mold base, the upper mold A sealing ring and a blank holder are provided around the body surface, and gas channels are respectively provided on the upper mold body and the lower mold body.

The sealing ring is fixed integrally with the upper mold body, and the blank holder is movably connected with the upper mold body through a connecting rod. Specifically, the lower end of the connecting rod may be fixedly connected with the blank holder, and the upper end of the connecting rod may be movably connected with the upper mold body.

The lower surface of the upper mold body is a molding surface, the sealing ring is arranged on the periphery of the molding surface, and the binder ring is arranged on the periphery of the sealing ring.

At least one of the molding surface of the upper mold body and the molding surface of the lower mold body is a molding surface;

When the surface of the upper mold body is the molding surface, the gas passage on the lower mold body is the air inlet pipe, and the gas passage on the upper mold body is the air outlet pipe;

When the profile surface of the lower mold body is the molding surface, the gas passage on the upper mold body is an air inlet pipe, and the gas passage on the lower mold body is an air outlet pipe.

The utility model not only has the pressing edge but also has the sealing function, integrates the pressing edge and the sealing function, combines the two processes of stamping and inflation, and realizes an integrated and innovative composite forming structure.

In the stamping stage, the upper mold body goes down, and the blank holder presses the plate; when the lower mold body goes down to the seal ring to press the plate, the stamping ends and the inflation starts, and the seal ring provides a sealing space for the inflation to ensure the formation of the inflation. Realize the continuous completion of stamping and inflation forming in one mold structure, combining the advantages of the two, avoiding the replacement of molds by different processes, improving the precision of parts, reducing mold costs, significantly shortening forming time, greatly improving production efficiency, and ensuring Mass production needs.

The unique design of the blank holder and sealing structure of the utility model makes both the convex mold surface and the concave mold surface can be used as the forming surface.

The utility model is especially suitable for rapid superplastic forming of aluminum alloy automobile covering parts, also suitable for rapid superplastic forming of covering parts such as trains, airplanes and ships, and also suitable for compound forming of stamping and inflation of other materials.

Specific examples:

As shown in Figure 1, the utility model is composed of upper mold and lower mold. , upper die heating ring outer suspension ring 6, upper die heating ring 7, heat preservation cover 8, connecting rod 9, spring 10, blank holder ring 11; lower die is provided with lower die seat 12, lower die body 13, air outlet pipe 14, Lower die heating ring 15.

The upper mold body 2 is fixed on the upper mold base 1, the sealing ring 3 is designed at the bottom of the upper mold body 2, and is integrated with the upper mold body 2, the upper mold heating ring outer suspension ring bracket 4 and the upper mold heating ring outer suspension ring 6 will The upper die heating ring 7 is fixed on the outer ring of the upper die body 2, one end of the connecting rod 9 is connected with the blank holder ring 11, and the other end is movably connected with the upper die body, and the thermal insulation cover 8 is fixed on the bottom end of the upper die heating ring 7, The function of the heating ring is to heat the upper and lower molds to a specific temperature, and to maintain the upper and lower mold bodies and the mold cavity under isothermal conditions. The lower mold body 13 is fixed on the lower mold base 12, the lower mold heating ring 15 is set on the outer ring of the lower mold body 13, the lower mold is provided with an air outlet pipe 14, and a plurality of through holes and air outlet pipes 14 are arranged at the groove of the lower mold surface connected.

Both hot stamping and superplastic inflation are carried out under specific temperature conditions, and the specific temperature is selected according to the characteristics of the selected aluminum alloy material.

As shown in FIG. 1 , before forming, the upper mold heating ring 7 and the lower mold heating ring 15 respectively heat the upper and lower mold bodies. After reaching the forming temperature, the aluminum alloy plate 16 is placed on the lower mold body 13 .

As shown in Figure 2, the upper die moves down, driving the connecting rod 9 and the blank holder 11 to move down and press the aluminum alloy plate 16, and each connecting rod 9 is respectively covered with a spring 10. With the movement of the upper die, the compression deformation of the spring 10 increases gradually, and the pressure of the blank holder 11 on the aluminum alloy plate 16 also increases gradually.

As shown in Figure 3, the upper die continues to move down, the plate begins to deform, the sealing ring 3 on the upper die reaches the predetermined position, contacts with the aluminum alloy plate 16 of the lower die, and the hot stamping ends. Under the action of the pressure of the upper and lower molds, the sealing ring presses the aluminum alloy sheet 16 to form a sealed space consisting of the upper mold and the aluminum alloy sheet 16 required for superplastic inflation forming.

As shown in Figure 4, the next step is to start inflatable forming. Gas is introduced from the air inlet pipe 5 of the upper die, and the aluminum alloy sheet 16 is gradually deformed under the action of the gas pressure, and the air on the back of the aluminum alloy sheet is discharged through the air outlet pipe 14 of the lower die. , to reduce the die-attaching resistance, under the action of gas pressure, the plate gradually fits the profile of the lower die body 13, and after a period of pressure holding, the inflation forming ends.

When the upper model surface is the forming surface, the air outlet pipe can also be used as the air inlet pipe, and the air inlet pipe can also be used as the air outlet pipe, and hot stamping and superplastic inflation forming are also performed.

The utility model respectively realizes hot stamping and superplastic inflation forming in the same mould, avoids changing molds in different processes, improves parts precision, reduces mold cost, significantly shortens forming time, greatly improves production efficiency, and ensures Mass production needs.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (5)

1. shaping dies that has flanging and hermetically-sealed construction, comprise upper die body that is fixed on the upper bolster and the lower mold body that is fixed on the die shoe, it is characterized in that, the periphery of the profile of described upper die body or lower mold body is provided with sealing ring and blank holder, and described upper die body and lower mold body are respectively equipped with gas passage.

2. the shaping dies that has flanging and hermetically-sealed construction according to claim 1 is characterized in that, described sealing ring and described upper die body or lower mold body are fixed as one, and described blank holder flexibly connects by connecting rod and described upper die body.

3. the shaping dies that has flanging and hermetically-sealed construction according to claim 2 is characterized in that, fixedlys connected with described blank holder in the lower end of described connecting rod, and the upper end of described connecting rod and described upper die body flexibly connect.

4. the shaping dies that has flanging and hermetically-sealed construction according to claim 3 is characterized in that, the lower surface of described upper die body is a profile, and described sealing ring is arranged on the periphery of described profile, and described blank holder is located at the periphery of described sealing ring.

5. according to each described shaping dies that has flanging and hermetically-sealed construction of claim 1 to 4, it is characterized in that the profile of described upper die body and the profile of described lower mold body have at least one to be the final forming surface of part;

When the profile of upper die body was forming surface, the gas passage on the lower mold body was an air inlet pipe, and the gas passage on the upper die body is an escape pipe;

When the profile of lower mold body was forming surface, the gas passage on the upper die body was an air inlet pipe, and the gas passage on the lower mold body is an escape pipe.

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