CN211707749U - Durable extrusion die body - Google Patents
Durable extrusion die body Download PDFInfo
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- CN211707749U CN211707749U CN201922391491.8U CN201922391491U CN211707749U CN 211707749 U CN211707749 U CN 211707749U CN 201922391491 U CN201922391491 U CN 201922391491U CN 211707749 U CN211707749 U CN 211707749U
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Abstract
The utility model discloses a durable extrusion die body belongs to extrusion die mould field, increases the protection to the centre form, improves the incorruptibility, prolongs its life, the utility model discloses a durable extrusion die body, include: the inner die is of a hollow annular structure, and a first channel is formed inside the inner die; the outer die is of a hollow annular structure, and a second channel is formed inside the outer die; and a fixed die including a fixing groove for accommodating the outer die; the diameter of the second channel is larger than that of the first channel, the outer die is provided with an insertion end and an output end, the insertion end is provided with a holding groove communicated with the second channel, the diameter of the insertion end is larger than that of the output end, and the shape of the holding groove is matched with that of the inner die so as to hold the inner die in the holding groove; when the centre form is installed in the holding tank, the holding tank inner wall with centre form periphery laminating.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to an extrusion die mould field especially relates to durable extrusion die body.
[ background of the invention ]
The extrusion is a hot working procedure, and mainly plays a role in cogging in the whole production process of the alloy pipe, and most of the extrusion dies disclosed in the prior art are formed by combining an inner die body and a die body. There are data showing that, among the total cost of the extrusion tools, the cost of the tools directly contacting the raw material accounts for 82% to 95% of the total cost, in which the extrusion die accounts for 25%, and in the case of manufacturing a cupronickel product, the cupronickel extrusion temperature is high, resulting in a higher proportion of the cost of the extrusion die, and in most cases, the inner die is damaged, and therefore, the improvement of the die and the improvement of the durability of the inner die are required.
[ Utility model ] content
The utility model aims to solve the technical problem that overcome prior art not enough and provide durable extrusion die body, increase the protection to the centre form, improve the incorruptibility, prolong its life.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a durable extrusion die body comprising:
the inner die is of a hollow annular structure, and a first channel is formed inside the inner die; and the number of the first and second groups,
the outer die is of a hollow annular structure, and a second channel is formed inside the outer die; and the number of the first and second groups,
a fixed die including a fixing groove for accommodating the outer die;
the diameter of the second channel is larger than that of the first channel, the outer die is provided with an insertion end and an output end, the insertion end is provided with a holding groove communicated with the second channel, the diameter of the insertion end is larger than that of the output end, and the shape of the holding groove is matched with that of the inner die so as to hold the inner die in the holding groove;
when the centre form is installed in the holding tank, the holding tank inner wall with centre form periphery laminating.
During operation, raw materials are directly contacted with the inner die, the outer die holds the inner die in the holding tank to protect the inner die, the strength of the inner die is enhanced, the raw materials enter the first channel to be contacted with the inner wall of the inner die during extrusion processing, pressure on the circumferential direction of the inner die is generated, the outer die blocks the pressure, and the inner die can be effectively prevented from being deformed under stress;
the diameter of the second channel is larger, so that the raw material is prevented from contacting the inner wall of the second channel after being shaped through the first channel, and the surface quality and the size of the processed blank are influenced;
after the inner wall of the accommodating groove is attached to the peripheral surface of the inner mold, the circumferential displacement of the inner mold is limited, so that the protective effect of the outer mold on the inner mold can be enhanced;
the insertion end is an inlet end of raw materials, the output end is an outlet of a formed blank, in the extrusion process, the thrust of the raw materials to the inner mold and the outer mold is in the direction from the insertion end to the output end, the thrust acts on the outer mold and the inner mold, so that the outer mold and the inner mold have the tendency of moving, the outer mold with the diameter larger than that of the output end at the insertion end is in a round table shape, and therefore under the reasoning effect, the outer mold is firmer in contact with the fixed film, the outer mold is not easy to deform, and the inner mold can be better protected.
Further, when the inner die is installed in the accommodating groove, the end face of the inner die is flush with the end face of the insertion end. If the inner die protrudes out of the end part of the outer die, the inner die protruding out of the surface of the outer die is short of blocking under the action of external force, and the situation of deformation and fragmentation is easy to occur, so after the inner die is required to be installed in the accommodating groove, the end surfaces of the inner die and the outer die are required to be flush or the end surface of the outer die is more protruded.
Further, when the outer die is installed in the fixing groove, the periphery of the outer die is attached to the inner wall of the fixing groove. Therefore, the fixed die can be better combined with the outer die, the deformation of the outer die is avoided, and the inner die is protected from being damaged.
Further, the inner die is a metal ceramic part, and the outer die is a metal part. The cermet material has the characteristics of high strength, high hardness, wear resistance, corrosion resistance, high temperature resistance, small deformation, certain rapid cooling and rapid heating resistance and the like, can perfectly meet the requirements of an internal mold of an extrusion mold, but has high brittleness and poor toughness, so that an external mold needs to be made of the metal material.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The invention will be further explained with reference to the drawings:
fig. 1 is a schematic structural view of an extrusion die body according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the inner mold and the outer mold in the embodiment of the present invention.
Reference numerals:
an inner mold 100, a first passage 110;
the outer mold 200, the second channel 210, the insertion end 220, the output end 230 and the accommodating groove 240;
a fixed mold 300 and a fixing groove 310.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" 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 to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, 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 according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 and 2, the present invention provides a durable extrusion die body, including:
an inner mold 100, wherein the inner mold 100 is a ring structure with a hollow interior, and a first channel 110 is formed inside the inner mold; and the number of the first and second groups,
the outer die 200 is a ring-shaped structure with a hollow interior, and a second channel 210 is formed in the outer die 200; and the number of the first and second groups,
a fixed mold 300, the fixed mold 300 including a fixing groove 310 for receiving the outer mold 200;
the diameter of the second channel 210 is larger than that of the first channel 110, the outer mold 200 has an insertion end 220 and an output end 230, the insertion end 220 is provided with a holding groove 240 communicated with the second channel 210, the insertion end 220 is larger than the output end 230 in diameter, and the holding groove 240 is shaped to fit with the inner mold 100 to hold the inner mold 100 in the holding groove 240;
when the inner mold 100 is installed in the accommodating groove 240, the inner wall of the accommodating groove 240 is attached to the periphery of the inner mold 100.
During operation, raw materials are directly contacted with the inner die 100, the outer die 200 accommodates the inner die 100 in the accommodating groove 240 to protect the inner die 100, the strength of the inner die 100 is enhanced, the raw materials enter the first channel 110 to be contacted with the inner wall of the inner die 100 during extrusion processing, pressure on the circumferential direction of the inner die 100 is generated, the outer die 200 blocks the pressure, and the inner die 100 can be effectively prevented from being deformed under stress;
the diameter of the second channel 210 is larger, so that the raw material is prevented from contacting the inner wall of the second channel 210 after the raw material passes through the first channel 110 and is shaped, and the surface quality and the size of the processed blank are influenced;
after the inner wall of the accommodating groove 240 is attached to the outer peripheral surface of the inner mold 100, the circumferential displacement of the inner mold 100 is limited, so that the protection effect of the outer mold 200 on the inner mold 100 can be enhanced;
the insertion end 220 is an inlet end of raw materials, the output end 230 is an outlet of a formed blank, in the extrusion process, the thrust of the raw materials to the inner mold 100 and the outer mold 200 is along the direction from the insertion end 220 to the output end 230, the thrust acts on the outer mold 200 and the inner mold 100, so that the inner mold 100 and the outer mold 200 have the tendency of moving, and the outer mold 200 with the diameter of the insertion end 220 larger than that of the output end 230 is in a circular truncated cone shape, so that under the reasoning effect, the outer mold 200 is in firmer contact with a fixed film, the outer mold 200 is not easy to deform, and the inner mold 100 can be better protected.
When the inner die 100 is installed in the accommodating groove 240, the end face of the inner die 100 is flush with the end face of the insertion end 220 so as to reduce the probability of deformation of the inner die 100, and if the inner die 100 protrudes out of the end of the outer die 200, the inner die 100 protruding out of the surface of the outer die 200 lacks of a barrier under the action of external force, so that the situation of deformation and fragmentation easily occurs; besides, the end faces of the inner mold 100 and the outer mold 200 may be flush, and the end face of the outer mold 200 may be designed to protrude further.
In order to enhance the protection effect of the fixing film on the outer mold 200, when the outer mold 200 is installed in the fixing groove 310, the outer periphery of the outer mold 200 is attached to the inner wall of the fixing groove 310, so that the fixing mold 300 can be better combined with the outer mold 200, the outer mold 200 is prevented from being deformed, and the inner mold 100 is protected from being damaged.
In the aspect of material selection, the inner mold 100 is a cermet material, which has the characteristics of high strength, high hardness, wear resistance, corrosion resistance, high temperature resistance, small deformation, certain rapid cooling and rapid heating resistance and the like, and can perfectly meet the requirements of the extrusion mold inner mold 100, but the cermet material has high brittleness and poor toughness.
In the prior production process, the damage of the extrusion die is mainly caused by the deformation or cracking of the outer die 200 to cause the damage of the inner cermet die 100, the cracking of the outer die 200 can cause the cracking and the block falling of the cermet die, the deformation of the outer die 200 can wrap the inner cermet die 100 to cause the inner cermet die 100 not to be recycled, and the cost of the inner cermet die 100 is high, so that the search for a high-quality material of the outer die 200 is particularly important.
Through screening, three external mold 200 materials are determined, which are respectively: h13; 3Cr2W 8V; INCONEL 718.
In order to test the effect of the external mold of the three materials, the test is carried out by adopting a single variable principle, namely, the extrusion dies of different die body materials are used for extruding the extruded products with the same grade and the same specification at the same temperature and the same speed.
The independent variables are as follows: 1) selecting a trial extrusion material: cupronickel B10; 2) extrusion temperature: 895 ℃; 3) extrusion speed: 28 mm/s; 3) specification of incoming material ingot casting: 213 x 475 mm; 4) the extruded product specification: 76 x 8 mm.
The independent variables are as follows: (1) h13 external mold; (2)3Cr2W8V outer die (3) INCONEL718 outer die.
The test results are as follows:
1) the external mold is H13 test result:
table 1 shows the requirements of the components of H13, H13 is hot-work die steel with the trademark of 4Cr5MoSiV1, has good comprehensive performance at medium temperature (less than or equal to 500 ℃) and has rapid reduction of hardness (namely the tolerable working temperature is 540 ℃) when the use temperature is higher than 540 ℃.
TABLE 1 composition H13
| C | Si | Mn | Cr | Mo | V | P | S |
| 0.32～0.45 | 0.80～1.20 | 0.20～0.50 | 4.75～5.50 | 1.10～1.75 | 0.80～1.20 | ≤0.030 | ≤0.03 |
Through a large number of experimental productions, the average output of the H13 external die extrusion die is about 15 tons/piece, and the main damage modes are as follows: the H13 external mould deformation bulge wraps the metal ceramic internal mould, so that the extrusion mould cannot be used, the size of the extruded tube blank does not meet the use requirement, but the metal ceramic mould is still good.
2) The external mold is 3Cr2W 8V:
table 2 shows the requirements of 3Cr2W8V, 3Cr2W8V is also hot-work die steel, is common die-casting die steel, has higher strength and hardness, good cold and hot fatigue resistance and better hardenability, but has poorer toughness and plasticity than H13.
TABLE 2.3Cr2W8V composition
| C | Si | Mn | Cr | W | V | P | S |
| 0.30～0.40 | ≤0.40 | ≤0.40 | 2.20～2.70 | 7.50～9.00 | 0.20～0.50 | ≤0.030 | ≤0.030 |
Through a large number of tests, the average output of an extrusion die of an external die of 3Cr2W8V is about 20 tons/piece, and the main damage modes are as follows: the outer die of the 3Cr2W8V cracks, the inner die of the metal ceramic is cracked, and the size and the surface quality of the extruded tube blank are poor.
3) Test results for external mold INCONEL 718:
table 3 shows the compositional requirements of INCONEL 718. The INCONEL718 alloy is a precipitation hardening type nickel-iron-based high-temperature alloy containing niobium and molybdenum, has an austenitic microstructure, has excellent comprehensive performance, and is one of the most widely applied high-temperature alloys.
TABLE 3 INCONEL718 composition
| Ni | Cr | Mo | Al | Ti | Nb | Fe | S |
| 50～55 | 17～21 | 2.8～3.3 | 0.2～0.8 | 0.65～1.15 | 4.75～5.50 | Balance of | ≤0.01 |
| C | Mn | Si | Cu | Co | B | P | |
| ≤0.08 | ≤0.35 | ≤0.35 | ≤0.3 | ≤1.0 | ≤0.006 | ≤0.01 |
Through a large number of experimental productions, the average yield of the extrusion die of the INCONEL718 external die is about 38 tons/piece, and the main damage modes of the extrusion die are as follows: the inner cermet mould cracks and falls off, so that the size and the surface quality of an extruded tube blank are poor, while the INCONEL718 outer mould is complete, a new inner cermet mould can be embedded again for continuous use, and the cost is greatly reduced.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (4)
1. A durable extrusion die body, comprising:
the inner die is of a hollow annular structure, and a first channel is formed inside the inner die; and the number of the first and second groups,
the outer die is of a hollow annular structure, and a second channel is formed inside the outer die; and the number of the first and second groups,
a fixed die including a fixing groove for accommodating the outer die;
the diameter of the second channel is larger than that of the first channel, the outer die is provided with an insertion end and an output end, the insertion end is provided with a holding groove communicated with the second channel, the diameter of the insertion end is larger than that of the output end, and the shape of the holding groove is matched with that of the inner die so as to hold the inner die in the holding groove; when the centre form is installed in the holding tank, the holding tank inner wall with centre form periphery laminating.
2. The durable extrusion die body of claim 1 wherein said inner die end surface is flush with said insertion end surface when said inner die is mounted in said receiving slot.
3. A durable extrusion die body as claimed in claim 1, wherein the outer die periphery conforms to the interior wall of the holding groove when the outer die is mounted in the holding groove.
4. A durable extrusion die body as claimed in any of claims 1 to 3 wherein said inner die is a cermet piece and said outer die is a metallic piece.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114192722A (en) * | 2021-12-31 | 2022-03-18 | 武汉理工大学 | Titanium-aluminum alloy hot forging forming method and die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114192722A (en) * | 2021-12-31 | 2022-03-18 | 武汉理工大学 | Titanium-aluminum alloy hot forging forming method and die |
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