Magnesium alloy casting thermal shaping die

Abstract

The utility model discloses a magnesium alloy casting thermal shaping die which comprises a lower die and an upper die, the lower die comprises a supporting face used for supporting a magnesium alloy casting, the shape of the supporting face corresponds to the shape of the lower side face of the magnesium alloy casting, and the upper die comprises a pressing face used for pressing the magnesium alloy casting. The shape of the pressing face corresponds to the shape of the upper side face of the magnesium alloy casting. When the upper die and the lower die are closed, the pressing face and the supporting face are matched to clamp the magnesium alloy casting between the upper die and the lower die, so that the magnesium alloy casting is heated evenly, the flatness can meet the requirement easily after thermal shaping, and the die is easy to operate and convenient to use and has mass production.

Description

Technical Field

[0001] The utility model relates to the technical field of hot shaping dies, in particular to a hot shaping die for bending magnesium alloy castings. Background Art

[0002] With the continuous development of the automotive industry, magnesium alloy castings have become an important component of automotive parts, such as magnesium alloy brackets for automobile central control screens and magnesium alloy instrument panel frames. The styles of automotive magnesium alloy castings are becoming more and more complex, and the requirements for flatness are also becoming higher and higher due to assembly requirements.

[0003] During the magnesium alloy die-casting process, the unique physical and chemical properties of magnesium alloys may cause the casting to deform and shrink during cooling. These deformations can affect the dimensional accuracy and geometry of the casting, adversely affecting the performance and quality of the final product. To overcome the deformation that occurs after die-casting, one existing method is to use a hot shaping machine to heat and shape the workpiece. Hot shaping is a process that changes the shape of the material by applying heat and force to correct deformation and shrinkage of the casting to achieve the desired size and geometry.

[0004] Existing magnesium alloy castings with curved or bent surfaces (such as magnesium alloy brackets for curved automotive center consoles) are large and have angles or curvatures. Therefore, using existing hot pressing methods for shaping parts is inconvenient and affects production efficiency. Furthermore, magnesium alloy castings suffer from uneven heating and fail to meet customer flatness requirements.

[0005] Therefore, it is necessary to provide a heat shaping mold that is easy to operate, has mass production capabilities, and can easily meet the flatness requirements during production to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a heat shaping mold which is easy to operate during production, has mass production capability and can easily meet the flatness requirements.

[0007] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a magnesium alloy casting hot shaping mold is provided, which is used for hot shaping of magnesium alloy castings, and includes a lower mold and an upper mold; wherein, the lower mold includes a supporting surface for supporting the magnesium alloy casting, and the shape of the supporting surface corresponds to the shape of the lower side surface of the magnesium alloy casting; the upper mold includes a holding surface for pressing the magnesium alloy casting, and the shape of the holding surface corresponds to the shape of the upper side surface of the magnesium alloy casting; when the upper mold and the lower mold are closed, the holding surface cooperates with the supporting surface to clamp the magnesium alloy casting therebetween.

[0008] Preferably, the lower die includes a first support surface and a second support surface arranged at an angle, the angle between the first and second support surfaces corresponding to the angle of the magnesium alloy casting. The upper die includes a first holding surface and a second holding surface arranged at an angle, the first holding surface corresponding to the first support surface, and the second holding surface corresponding to the second support surface. When the magnesium alloy casting is placed on the lower die, it is supported by the first and second support surfaces corresponding to the angle of the bending angle, making it simple to operate, convenient to use, and suitable for mass production.

[0009] Preferably, at least one boss is provided on each of the first supporting surface and the second supporting surface, and the boss corresponds to the recessed portion on the lower side surface of the magnesium alloy casting; at least one groove is provided on each of the first holding surface and the second holding surface, and each groove corresponds to each boss; when the magnesium alloy casting is placed on the first supporting surface and the second supporting surface, the recessed portion of the magnesium alloy casting is clamped on each boss; when the upper mold is pressed down on the lower mold, the grooves on the first holding surface and the second holding surface cooperate with each boss, so that the magnesium alloy casting is heated evenly, and after thermal shaping, the flatness can easily meet the requirements.

[0010] Preferably, the first supporting surface and the second supporting surface are arranged obliquely downward from the middle of the lower mold to both ends; the first holding surface and the second holding surface are arranged obliquely downward from the middle of the upper mold to both ends.

[0011] Preferably, each of the bosses protruding from the first supporting surface and the second supporting surface is arranged parallel to the first supporting surface or the second supporting surface.

[0012] Preferably, the lower mold further includes a plurality of first positioning columns, each of which is protruding from at least one side of the first supporting surface and the second supporting surface, and each of which corresponds to a snap-fit portion of the magnesium alloy casting.

[0013] Preferably, when the upper mold and the lower mold are closed, each of the first positioning posts abuts against the upper mold or / and is accommodated in a positioning groove provided in the upper mold.

[0014] Preferably, the upper mold further includes second positioning posts. When the upper mold and the lower mold are closed, each of the second positioning posts abuts against the lower mold or / and is accommodated in a positioning groove provided in the lower mold.

[0015] Preferably, the lower mold further includes two side walls, each of the side walls extends along the longitudinal direction of the lower mold, and the first supporting surface and the second supporting surface are arranged between the two side walls.

[0016] Preferably, a plurality of protrusions are respectively provided on both sides of the upper mold in the horizontal width direction, and the protrusions are respectively arranged at intervals along the longitudinal direction of the upper mold. When the upper mold and the lower mold are closed, the protrusions respectively abut against the two side walls.

[0017] Compared to the prior art, the magnesium alloy casting hot shaping mold of the present invention has a support surface corresponding to the shape of the lower side of the magnesium alloy casting on the lower mold, and a holding surface corresponding to the shape of the upper side of the magnesium alloy casting on the upper mold. Therefore, when the magnesium alloy casting is placed on the lower mold, the magnesium alloy casting is supported on the support surface corresponding to its shape. When the upper mold is pressed down, the holding surface corresponding to the shape of the magnesium alloy casting is pressed against it. The holding surface and the support surface cooperate to clamp the magnesium alloy casting between the two, so that the magnesium alloy casting is heated evenly. After hot shaping, the flatness of the magnesium alloy casting can easily meet the requirements. In addition, the operation is simple, the use is convenient, and it has mass production capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a magnesium alloy casting hot shaping die of the present invention.

[0019] Figure 2 yes Figure 1 Exploded diagram of .

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle and lower molds from another angle.

[0021] Figure 4 yes Figure 2 Schematic diagram of the structure of the middle and upper mold from another angle.

[0022] Figure 5 This is a schematic diagram of the magnesium alloy casting installed in the lower mold.

[0023] Figure 6 This is a schematic diagram of the magnesium alloy casting installed on the upper mold.

[0024] Figure 7 This is a cross-sectional view of a magnesium alloy casting after installation in a hot forming die.

[0025] Figure 8 This is another cross-sectional view of the magnesium alloy casting after it is installed in the hot forming mold. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element numbers represent similar elements. It should be noted that the orientation descriptions involved in the present invention, such as the orientations or positional relationships indicated by up, down, left, right, front, and back, are all based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present application or / and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. The first, second, etc. described are only used to distinguish technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] Combine Figures 1-8 As shown, the magnesium alloy casting heat shaping mold 100 provided by the present invention is suitable for heat shaping of the flatness of the bent screen magnesium alloy bracket, but is not limited to this. Of course, it can also be used for heat shaping of other bent castings by adaptively adjusting their internal structures.

[0028] Continue to combine Figures 1-8 As shown, in the present invention, the magnesium alloy casting hot shaping die 100 includes a lower die 110 and an upper die 120. The lower die 110 includes a support surface for supporting the magnesium alloy casting 200, the shape of which corresponds to the shape of the lower side of the magnesium alloy casting 200. The upper die 120 includes a holding surface for pressing the magnesium alloy casting 200, the shape of which corresponds to the shape of the upper side of the magnesium alloy casting 200. When the upper and lower dies are closed, the holding surface cooperates with the support surface to clamp the magnesium alloy casting 200 therebetween.

[0029] Combine Figure 2-Figure 3 As shown, in one embodiment, the lower mold 110 includes a first supporting surface 111 and a second supporting surface 112. The first supporting surface 111 and the second supporting surface 112 are arranged at an angle, and the angle between the first supporting surface 111 and the second supporting surface 112 corresponds to the angle of the magnesium alloy casting 200. When the magnesium alloy casting 200 is placed on the lower mold 110, the magnesium alloy casting 200 is placed correspondingly on the first supporting surface 111 and the second supporting surface 112. Figure 5 As shown, the magnesium alloy casting 200 can be quickly installed, thereby improving production efficiency.

[0030] Combine Figure 4 、 Figure 6-7As shown, the upper die 120 includes a first holding surface 121 and a second holding surface 122. The angle between the first holding surface 121 and the second holding surface 122 corresponds to the angle between the first support surface 111 and the second support surface 112. When the upper die 120 is pressed downwardly against the lower die 110, the first holding surface 121 corresponds to the first support surface 111, and the second holding surface 122 corresponds to the second support surface 112, achieving complete closure of the upper die 120 and the lower die 110. This ensures uniform heating of the magnesium alloy casting 200 during hot forming, making it easier to achieve the required flatness of the magnesium alloy casting 200.

[0031] The following combination Figure 2-7 As shown, in one embodiment of the present invention, at least one boss is provided on each of the first and second support surfaces 111, 112, and each boss is arranged parallel to the first and second support surfaces 111, 112. More specifically, the bosses provided on the first and second support surfaces 111, 112 correspond to recessed portions 210 on the lower side of the magnesium alloy casting 200. The recessed portions 210 are formed by the upward depression of the lower side of the magnesium alloy casting 200. Therefore, on the upper side of the magnesium alloy casting 200, the recessed portions 210 are located at the position of raised portions. When the magnesium alloy casting 200 is placed on the first and second support surfaces 111, 112, the recessed portions 210 of the magnesium alloy casting 200 engage with the respective bosses, achieving accurate alignment and rapid installation of the magnesium alloy casting 200.

[0032] Correspondingly, at least one groove is provided on each of the first pressing surface 121 and the second pressing surface 122 of the upper die 120. The groove on the first pressing surface 121 corresponds to the boss on the first supporting surface 111, and the groove on the second pressing surface 122 corresponds to the boss on the second supporting surface 112. Thus, when the upper die 120 is pressed downward, the grooves on the first pressing surface 121 engage with the corresponding protrusions of the magnesium alloy casting 200, and the grooves on the second pressing surface 122 engage with the corresponding protrusions of the magnesium alloy casting 200. That is, the grooves on the first pressing surface 121 cooperate with the bosses on the first supporting surface 111, and the grooves on the second pressing surface 122 cooperate with the bosses on the second supporting surface 112, thereby completely clamping the magnesium alloy casting 200.

[0033] Recombination Figure 2-Figure 3As shown, in one embodiment of the present invention, the first and second support surfaces 111, 112 are arranged downwardly and tilted from the middle of the lower mold 110 toward its ends in the longitudinal direction. That is, the ends of the first and second support surfaces 111, 112 that are closer to each other are higher, while the ends that are farther apart are lower. Furthermore, each of the first and second support surfaces 111, 112 is provided with a first and second stepped boss 113, 114. The second boss 114 protrudes from the first boss 113, and both the second boss 114 and the first boss 113 are arranged parallel to the first and second support surfaces 111, 112. In this embodiment, the first bosses 113 on the first and second support surfaces 111, 112 are symmetrically arranged and of the same size, while the positions of the two second bosses 114 are asymmetrical. Of course, in other embodiments, the number of bosses on the first and second support surfaces 111, 112 and their positional relationship can be flexibly adjusted based on the specific product structure, and are not specifically limited here.

[0034] Combine Figure 4 、 Figure 6 As shown, the first pressing surface 121 and the second pressing surface 122 are arranged downwardly from the middle of the upper mold 120 to the two ends in the longitudinal direction thereof, that is, the thickness of the first pressing surface 121 and the second pressing surface 122 at the ends away from each other is larger. The first pressing surface 121 is provided with a first groove 123 and a second groove 124 in a stepped shape, as shown in FIG. Figure 4 As shown, the first groove 123 and the second groove 124 correspond to the first boss 113 and the second boss 114 on the first supporting surface 111. The second pressing surface 122 is also provided with a first groove 123 and a second groove 124 in a stepped shape. Figure 4 As shown, the first groove 123 and the second groove 124 correspond to the first boss 113 and the second boss 114 on the second supporting surface 112. Figure 7 As shown, when the upper mold 120 is pressed down on the lower mold 110, the first groove 123 and the second groove 124 on the first holding surface 121 are correspondingly engaged with the raised portion on the magnesium alloy casting 200, so that the first groove 123 and the second groove 124 on the first holding surface 121 are matched with the first boss 113 and the second boss 114 on the first supporting surface 111, and the first groove 123 and the second groove 124 on the second holding surface 122 are correspondingly engaged with the raised portion on the magnesium alloy casting 200, so that the first groove 123 and the second groove 124 on the second holding surface 122 are matched with the first boss 113 and the second boss 114 on the second supporting surface 112, thereby completely pressing and fitting the magnesium alloy casting 200, so that the magnesium alloy casting 200 is evenly heated and the flatness during shaping can easily meet the requirements.

[0035] Combine Figure 3-5、 Figure 8 As shown, in one embodiment of the present invention, the lower mold 110 further includes a plurality of first positioning posts 115, each of which is protruding from at least one side of the first support surface 111 and the second support surface 112, and each of the first positioning posts 115 is spaced apart along the longitudinal direction of the lower mold 110. In this embodiment, four spaced apart first positioning posts 115 are protruding from the lower mold 110, and the four first positioning posts 115 are disposed on one side of the first support surface 111 and the second support surface 112 along the longitudinal direction of the lower mold 110. The four first positioning posts 115 correspond to the four buckle portions 220 protruding from the magnesium alloy casting 200. There is no specific limitation on the height, shape, etc. of the four first positioning posts 115, and they can be flexibly arranged according to the buckle portions 220 of different magnesium alloy castings 200. When the magnesium alloy casting 200 is placed on the lower mold 110 , the four buckle portions 220 protruding from one side thereof are correspondingly engaged with the four first positioning pillars 115 , making the installation operation of the magnesium alloy casting 200 simple and accurate in alignment, thereby improving production efficiency.

[0036] Combine Figure 4 、 Figure 8 As shown, the upper mold 120 may also be provided with positioning slots corresponding to the first positioning posts 115, specifically determined by the height of each first positioning post 115. In this embodiment, the positioning slots 125 are provided on the upper mold 120 at positions corresponding to the tallest first positioning posts 115. Thus, when the upper mold 120 and lower mold 110 are closed, each first positioning post 115 abuts against the upper mold 120 and / or is accommodated within a corresponding positioning slot 125.

[0037] The following combination Figure 6 、 Figure 8 As shown, in one embodiment of the present invention, the upper mold 120 may further be provided with a second positioning post 126. When the upper mold 120 and the lower mold 110 are closed, the second positioning post 126 abuts against the lower mold 110 or / and is accommodated in a positioning groove provided on the lower mold 110.

[0038] The following combination Figure 1-Figure 4 As shown, in one embodiment of the present invention, the lower mold 110 further includes two side walls 116, each of which extends along the longitudinal direction of the lower mold 110. In other words, the side walls 116 are respectively provided on both sides of the lower mold 110 in the transverse direction. Furthermore, the side walls 116 are arranged parallel to each other and have the same height, and the first support surface 111 and the second support surface 112 are provided between the side walls 116.

[0039] In this embodiment, a plurality of protrusions 127 are respectively provided on both sides of the upper mold 120 in the transverse direction, and the protrusions 127 are respectively spaced apart along the longitudinal direction of the upper mold 120. When the upper mold 120 is pressed down on the lower mold 110, the protrusions 127 respectively abut against the two side walls 116.

[0040] Recombination Figures 1-8 As shown, when the magnesium alloy casting hot shaping mold 100 of the present invention is used, the upper mold 120 and the lower mold 110 are first heated to 230±10°C, and then the magnesium alloy casting 200 is placed. At this time, the magnesium alloy casting 200 is engaged with the first support surface 111 and the second support surface 112, and the recessed portion 210 on the magnesium alloy casting 200 is respectively engaged with the first boss 113 and the second boss 114, and the four buckle portions 220 protruding from the side of the magnesium alloy casting 200 are respectively engaged with the four first positioning columns 115, as shown in FIG. Figure 5 As shown, the magnesium alloy casting 200 can be quickly installed on the lower mold 110 and accurately aligned, with simple operation and convenient use.

[0041] When the upper die 120 is pressed down, the first pressing surface 121 of the upper die 120 cooperates with the first supporting surface 111, and the second pressing surface 122 cooperates with the second supporting surface 112. At the same time, the first groove 123 and the second groove 124 are correspondingly engaged with the protrusions on the magnesium alloy casting 200, so that the first groove 123 cooperates with the first boss 113, and the second groove 124 cooperates with the second boss 114, and the magnesium alloy casting 200 is completely pressed between the upper die 120 and the lower die 110. Figure 7 After holding the pressure for 60s to 80s, the hot shaping is completed and the magnesium alloy casting 200 can meet the flatness requirement. The flatness requirement of the bent magnesium alloy casting 200 can be easily achieved and is mass-producible.

[0042] In summary, the magnesium alloy casting hot shaping mold 100 of the present invention has a support surface corresponding to the shape of the lower side surface of the magnesium alloy casting 200 provided on the lower mold 110, and a holding surface corresponding to the shape of the upper side surface of the magnesium alloy casting 200 provided on the upper mold 120. Therefore, when the magnesium alloy casting 200 is placed on the lower mold 110, the magnesium alloy casting 200 is supported on the support surface corresponding to the shape thereof. When the upper mold 120 is pressed downward, the holding surface corresponding to the shape of the magnesium alloy casting 200 is pressed against it. The holding surface and the support surface cooperate to clamp the magnesium alloy casting 200 between the two, so that the magnesium alloy casting 200 is heated evenly. After hot shaping, the flatness of the magnesium alloy casting 200 can easily meet the requirements. In addition, the operation is simple, the use is convenient, and the casting is suitable for mass production.

[0043] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A magnesium alloy casting hot shaping mold for hot shaping of magnesium alloy castings, characterized in that: include: a lower die, comprising a support surface for supporting the magnesium alloy casting, wherein the shape of the support surface corresponds to the shape of the lower side surface of the magnesium alloy casting; an upper die, comprising a holding surface for holding the magnesium alloy casting, wherein the shape of the holding surface corresponds to the shape of the upper side surface of the magnesium alloy casting; When the upper die and the lower die are closed, the pressing surface cooperates with the supporting surface to clamp the magnesium alloy casting therebetween.

2. The magnesium alloy casting hot shaping mold according to claim 1, characterized in that: The lower die includes a first supporting surface and a second supporting surface arranged at an angle, wherein the angle between the first supporting surface and the second supporting surface corresponds to the angle of the magnesium alloy casting; The upper mold includes a first pressing surface and a second pressing surface arranged at an angle, the first pressing surface corresponds to the first supporting surface, and the second pressing surface corresponds to the second supporting surface.

3. The magnesium alloy casting hot shaping mold according to claim 2, characterized in that: At least one boss is provided on each of the first supporting surface and the second supporting surface, and the boss corresponds to the recessed portion on the lower side of the magnesium alloy casting; The first pressing surface and the second pressing surface are each provided with at least one groove, and each groove corresponds to each boss; When the magnesium alloy casting is placed on the first supporting surface and the second supporting surface, the recessed portion of the magnesium alloy casting is clamped on each of the bosses; when the upper mold is pressed down on the lower mold, the grooves on the first holding surface and the second holding surface cooperate with each of the bosses.

4. The magnesium alloy casting hot shaping mold according to claim 2, characterized in that: The first supporting surface and the second supporting surface are arranged obliquely downward from the middle of the lower mold toward both ends; the first pressing surface and the second pressing surface are arranged obliquely downward from the middle of the upper mold toward both ends.

5. The magnesium alloy casting hot shaping mold according to claim 3, characterized in that: Each of the bosses protruding from the first supporting surface and the second supporting surface is arranged parallel to the first supporting surface or the second supporting surface.

6. The magnesium alloy casting hot shaping mold according to claim 2, characterized in that: The lower mold further includes a plurality of first positioning columns, each of which is protruding from at least one side of the first supporting surface and the second supporting surface, and each of which corresponds to a snap-fit portion of the magnesium alloy casting.

7. The magnesium alloy casting hot shaping mold according to claim 6, characterized in that: When the upper mold and the lower mold are closed, each of the first positioning posts abuts against the upper mold or / and is accommodated in a positioning groove provided in the upper mold.

8. The magnesium alloy casting hot shaping mold according to claim 1, characterized in that: The upper mold further includes second positioning posts. When the upper mold and the lower mold are closed, each of the second positioning posts abuts against the lower mold or / and is accommodated in a positioning groove provided in the lower mold.

9. The magnesium alloy casting hot shaping die according to any one of claims 2 to 7, characterized in that: The lower mold further includes two side walls, each of which extends along the longitudinal direction of the lower mold, and the first supporting surface and the second supporting surface are arranged between the two side walls.

10. The magnesium alloy casting hot shaping mold according to claim 9, characterized in that: A plurality of protrusions are respectively provided on both sides of the upper mold in the horizontal width direction, and the protrusions are respectively arranged at intervals along the longitudinal direction of the upper mold. When the upper mold and the lower mold are closed, the protrusions respectively abut against the two side walls.

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