CN215143469U - Magnesium alloy rod extrusion reducing die - Google Patents
Magnesium alloy rod extrusion reducing die Download PDFInfo
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- CN215143469U CN215143469U CN202022580665.8U CN202022580665U CN215143469U CN 215143469 U CN215143469 U CN 215143469U CN 202022580665 U CN202022580665 U CN 202022580665U CN 215143469 U CN215143469 U CN 215143469U
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Abstract
The utility model provides a magnesium alloy rod extrusion reducing die, which comprises an upper die and a lower die; the upper die is provided with a reducing inlet and a flow guide port; the sections of the reducing inlet and the diversion port are circular; the lower die and the upper die are installed in a matched mode; the lower die is provided with: the section of the bar inlet is circular; the inlet of the variable diameter section is communicated with the inlet of the bar, and the outlet of the variable diameter section is communicated with the variable diameter inlet of the upper die; a variable diameter cavity; the variable diameter section comprises a plurality of sections of variable diameter cavities, the variable diameter cavities are cylindrical, and the sections of the variable diameter cavities are circular; the cross section of the variable-diameter cavity and the centers of the cross section of the bar inlet, the variable-diameter inlet and the cross section of the flow guide port are positioned on the same straight line; the area of the cross section of the multiple sections of reducing cavities is sequentially reduced from the bar inlet to the bar outlet, and the area of the cross section of the last section of reducing cavity is larger than that of the reducing inlet of the upper die; the service life of the die is prolonged, and the due mechanical property of the bar is ensured.
Description
Technical Field
The utility model relates to a magnesium alloy rod extrusion reducing mould.
Background
In recent years, the magnesium alloy has higher strength, good shock absorption, larger impact load bearing capacity than the aluminum alloy, good corrosion resistance and small density; it is currently the lightest of the practical metals, and is now widely used in the industrial and domestic fields, such as automobile frames, bicycle frames, supports for tables and chairs, and the like; due to the design requirements of various products, sometimes a magnesium alloy thick rod needs to be subjected to an extrusion reducing method, namely, a die (shown in figure 1) arranged on a press is utilized, an upper die 1 and a lower die 2 are matched and installed, and then fed at a certain speed by applying pressure, so that a magnesium alloy pipe enters a pipe of the lower die 2, the pipe diameter of a reducing pipe of the upper die 1 is smaller than that of the lower die 2, and the metal generates plastic deformation under certain pressure, so that a magnesium alloy rod with a smaller diameter is prepared; the mould that adopts at present has two problems: firstly, the service life of the die is short, and the extrusion contact surface 11 of the upper die 1 is easy to crack; secondly, the mechanical property of the thinned magnesium alloy rod is greatly changed, and the quality of the product is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects, a magnesium alloy rod extrusion reducing die.
The utility model adopts the following technical scheme:
a magnesium alloy rod extrusion reducing die comprises: an upper die and a lower die; the upper die is provided with a reducing inlet and a flow guide port; the sections of the reducing inlet and the diversion port are circular; the lower die and the upper die are installed in a matched mode.
The lower die is provided with: the section of the bar inlet is circular; the inlet of the variable diameter section is communicated with the inlet of the bar, and the outlet of the variable diameter section is communicated with the variable diameter inlet of the upper die; a variable diameter cavity; the variable diameter section comprises a plurality of sections of variable diameter cavities which are cylindrical; the cross section of the variable-diameter cavity and the centers of the cross section of the bar inlet, the variable-diameter inlet and the cross section of the flow guide port are positioned on the same straight line; the area of the cross section of the variable diameter cavity is gradually reduced from the rod inlet to the rod outlet, and the cross section area of the variable diameter cavity at the last section is larger than that of the variable diameter inlet of the upper die.
Preferably, the variable diameter section is provided with a variable diameter cavity of 3-5 sections.
Preferably, the areas of the sections of the variable-diameter cavities are sequentially reduced from the bar inlet to the bar outlet, and the adjacent section ratios are 5: 4; the ratio of the cross-sectional area of the last section of the variable-diameter cavity to the cross-sectional area of the variable-diameter inlet of the upper die is 5: 4.
The utility model innovates the traditional mould, adopts the innovative mode of multi-stage reducing, and is a final product formed by continuous innovation and continuous trial of research personnel; the prior extrusion forming is a magnesium alloy rod reducing conventional die, and research and development personnel in our research and development have intermediate products in the process of improvement, but the effect is not obvious, for example, an upper die adopts a funnel-shaped extrusion forming mode, or the contact surface of the funnel surface and the reducing inlet of a lower die bears huge pressure (the extrusion forming is generally pressure of thousands of tons) and is easy to crack, although the mechanical property of the processed magnesium rod is not changed greatly, the loss of the die is greatly improved.
The utility model has the advantages that: because the multi-time segmented diameter changing is adopted, the bearing pressure is shared by a plurality of contact surfaces, so that the contact surfaces of the die are not easy to crack, and the service life of the die is prolonged; in addition, the problem that the mechanical property of the extruded and formed bar is greatly changed due to the fact that the structure of the thin bar is greatly changed from that of the original bar due to the fact that the thin bar is extruded out from the middle of the thick bar and then extruded out from the periphery of the thick bar in the traditional die is solved by adopting multiple segmented diameter changing; the utility model discloses a structure has leaded to the whole outside extrusion deformation of thick stick, divides to go on many times, and the even extrusion of whole rod, structural change is little, guarantees due mechanical properties.
Drawings
Fig. 1 is a schematic view of the present conventional mold.
Fig. 2 is a schematic diagram of the present invention.
Detailed Description
In order to make the purpose and technical solution of the present invention clearer, the following description is made with reference to the accompanying drawings and embodiments to further explain the present invention:
the magnesium alloy rod extrusion reducing die shown in fig. 2 comprises: an upper die 1 and a lower die 2; the upper die 1 is provided with a reducing inlet 12 and a flow guide port 13; the sections of the reducing inlet 12 and the diversion port 13 are both circular; the lower die 2 and the upper die 1 are installed in a matched mode; the lower die 2 is provided with: a rod inlet 21 with a circular cross section; the inlet of the variable diameter section is communicated with the inlet of the bar, and the outlet of the variable diameter section is communicated with the variable diameter inlet of the upper die; a variable diameter cavity 3; the variable diameter section 22 comprises a plurality of sections of variable diameter cavities 3, and the plurality of sections of variable diameter cavities 3 are cylindrical; the cross section of the variable-diameter cavity and the circle centers of the cross section of the bar inlet 21, the variable-diameter inlet 12 and the cross section of the flow guide port 13 are positioned on the same straight line; the area of the cross section of the variable diameter cavity 3 is gradually reduced from the rod inlet to the rod outlet, and the cross section area of the variable diameter cavity at the last section is larger than that of the variable diameter inlet 12 of the upper die 1.
Preferably, the variable diameter section 22 is provided with a variable diameter cavity 3 with 3-5 sections.
Preferably, the areas of the sections of the variable-diameter cavities are sequentially reduced from the bar inlet to the bar outlet, and the adjacent section ratios are 5: 4; the ratio of the cross-sectional area of the last section of the variable-diameter cavity to the cross-sectional area of the variable-diameter inlet of the upper die is 5: 4.
The utility model discloses magnesium alloy rod is through multistage reducing cavity 3 under pressure, the even extrusion of whole rod, and structural change is little, guarantees due mechanical properties.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected", and the like are to be construed broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses the part that adopts is the part that general standard spare or technical staff in the field know, and its structure and principle all are this technical staff all can learn through the technical manual or learn through conventional experimental method, for example go up the direction of mould, lower mould and aim at the installation, bolted connection when both install is fixed etc. is conventional method, this novel do not do the perusal.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still belong to the protection scope of the present invention.
Claims (3)
1. A magnesium alloy rod extrusion reducing die comprises an upper die and a lower die; the upper die is provided with a reducing inlet and a flow guide port; the sections of the reducing inlet and the diversion port are circular; the lower mould is installed with last mould cooperation, its characterized in that, the lower mould is equipped with:
the section of the bar inlet is circular;
the inlet of the variable diameter section is communicated with the inlet of the bar, and the outlet of the variable diameter section is communicated with the variable diameter inlet of the upper die;
a variable diameter cavity; the variable diameter section comprises a plurality of sections of variable diameter cavities which are cylindrical; the cross section of the variable-diameter cavity and the centers of the cross section of the bar inlet, the variable-diameter inlet and the cross section of the flow guide port are positioned on the same straight line;
the area of the cross section of the variable diameter cavity is gradually reduced from the rod inlet to the rod outlet, and the cross section area of the variable diameter cavity at the last section is larger than that of the variable diameter inlet of the upper die.
2. The magnesium alloy rod extrusion reducing die according to claim 1, characterized in that:
the reducing section is provided with a reducing cavity of 3-5 sections.
3. The magnesium alloy rod extrusion reducing die according to claim 1, characterized in that:
the areas of the sections of the variable-diameter cavities are sequentially reduced from the bar inlet to the bar outlet, and the adjacent section ratios are 5: 4; the ratio of the cross-sectional area of the last section of the variable-diameter cavity to the cross-sectional area of the variable-diameter inlet of the upper die is 5: 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022580665.8U CN215143469U (en) | 2020-11-10 | 2020-11-10 | Magnesium alloy rod extrusion reducing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022580665.8U CN215143469U (en) | 2020-11-10 | 2020-11-10 | Magnesium alloy rod extrusion reducing die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215143469U true CN215143469U (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022580665.8U Active CN215143469U (en) | 2020-11-10 | 2020-11-10 | Magnesium alloy rod extrusion reducing die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215143469U (en) |
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2020
- 2020-11-10 CN CN202022580665.8U patent/CN215143469U/en active Active
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