CN220216271U - Sizing block for extrusion of large-diameter bar without shrinkage tail - Google Patents
Sizing block for extrusion of large-diameter bar without shrinkage tail Download PDFInfo
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- CN220216271U CN220216271U CN202320882585.9U CN202320882585U CN220216271U CN 220216271 U CN220216271 U CN 220216271U CN 202320882585 U CN202320882585 U CN 202320882585U CN 220216271 U CN220216271 U CN 220216271U
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- extrusion
- sizing block
- block body
- blank
- shrinkage
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- 238000001125 extrusion Methods 0.000 title claims abstract description 102
- 238000004513 sizing Methods 0.000 title claims abstract description 76
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims abstract description 9
- 229920000742 Cotton Polymers 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
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- Extrusion Of Metal (AREA)
Abstract
The utility model discloses a sizing block for extrusion of a large-diameter bar without shrinkage tails, and relates to the technical field of extrusion molding. The die comprises a sizing block body, wherein the sizing block body is positioned at the lower end of an extrusion blank when being extruded and is close to one side of an extrusion rod, and the sizing block body and the extrusion blank are both positioned in an extrusion die when being extruded; an inner hole is formed in one side, close to the extrusion blank, of the sizing block body, the section shape of the inner hole is an isosceles trapezoid, the height of the inner hole is 1/2 of that of the sizing block body, and the angle b of the inner hole is equal to the angle a of the extrusion die; the heating temperature of the sizing block body is different from that of the extrusion blank, and heat insulation cotton is placed between the sizing block body and the extrusion blank. According to the utility model, the sizing block body is arranged, so that the extrusion rod is prevented from being in direct contact with the extrusion blank, and the inner hole is formed in the sizing block body, so that the sizing block body is prevented from being in direct contact with the center of the extrusion blank, the defects of tail shrinkage, shrinkage cavity and the like generated in the extrusion process of large-diameter titanium alloy and high-temperature alloy bars are overcome, and the bar yield is improved.
Description
Technical Field
The utility model belongs to the technical field of extrusion molding, and particularly relates to a sizing block for extrusion of a large-diameter bar without shrinkage tails.
Background
With the development of the fields of aerospace, weapon industry and the like in China, the large-diameter titanium alloy and high-temperature alloy bars are increasingly formed by adopting an extrusion process. Along with the popularization of the extrusion process for producing large-diameter bars, the influence of shrinkage generated in the extrusion process on the quality of products is larger and larger, the extrusion shrinkage refers to a special funnel-shaped defect which appears at the tail of an extruded product, through low-power inspection, the middle part of the cross section has a phenomenon of being in a non-laminated shape like a horn, the forward extrusion is longer than the backward extrusion generally, the light alloy is longer than the hard alloy, the forward extrusion product is in a ring shape and is in a non-laminated shape, and the backward extrusion product is in a central funnel shape. It is produced in the later stage of extrusion process, and the extrusion shrinkage tail often contains oxides, greasy dirt and other defects on the surface of ingot blank, which damages the compactness and continuity of metal and seriously affects the performance of the material.
The following problems are particularly present when extruding large-diameter titanium alloy and superalloy bars:
(1) Defects such as tail shrinkage, shrinkage cavity and the like exist at the tail part of the bar, so that flaw detection is not qualified;
(2) The yield of the bar is less than 65%.
Therefore, the adoption of the shrinkage-free extrusion sizing block has important significance for improving the flaw detection and the yield of the large-diameter bar.
Disclosure of Invention
The utility model aims to provide a sizing block for extrusion of a large-diameter bar without tail shrinkage, which is characterized in that a sizing block body is arranged to prevent an extrusion rod from being in direct contact with an extrusion blank, an inner hole is formed in the sizing block body to prevent the sizing block body from being in direct contact with the center of the extrusion blank, so that the defects of tail shrinkage, shrinkage cavity and the like generated in the extrusion process of the large-diameter titanium alloy and high-temperature alloy bar are overcome, and the bar yield is improved.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model relates to a sizing block for extrusion of a large-diameter bar without shrinkage tails, which comprises a sizing block body, wherein the sizing block body is positioned at the lower end of an extrusion blank when being extruded, is close to one side of an extrusion rod, and is positioned in an extrusion die when being extruded.
An inner hole is formed in one side, close to the extrusion blank, of the sizing block body, and the section shape of the inner hole is an isosceles trapezoid.
Further, the shape of the sizing block body is set to be cylindrical; the outer diameter of the sizing block body is the same as the outer diameter of the extrusion blank, and the outer diameter of the sizing block body is equal to the inner diameter of the extrusion die minus 5-15 mm.
Further, the height of the sizing block body is 5% -10% of the inner diameter of the extrusion die.
Further, the height of the inner hole is 1/2 of the height of the sizing block body.
Further, the angle b of the internal bore is equal to the angle a of the extrusion die.
Further, the material of the sizing block body is stainless steel when high-temperature alloy is extruded, and low-value steel Q235 is selected when titanium alloy is extruded. The value of stainless steel is higher than steel Q235, and different extrusion blank materials adopt sizing block bodies of different materials, so that the production cost can be effectively reduced.
Further, the heating temperature of the sizing block body is different from that of the extrusion blank, and heat insulation cotton is placed between the sizing block body and the extrusion blank.
The utility model has the following beneficial effects:
1. according to the utility model, the sizing block body is arranged, so that the extrusion rod is prevented from being in direct contact with the extrusion blank, and the inner hole is formed in the sizing block body, so that the sizing block body is prevented from being in direct contact with the center of the extrusion blank, the defects of tail shrinkage, shrinkage cavity and the like generated in the extrusion process of large-diameter titanium alloy and high-temperature alloy bars are overcome, and the bar yield is improved.
2. According to the utility model, through optimizing the angle b of the inner hole, the height of the inner hole and the cross-sectional shape of the inner hole, the structural strength of the sizing block body can meet the extrusion requirement, and meanwhile, the separation area of the sizing block body and an extrusion blank is improved to the greatest extent, so that the material is saved, and the production cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an assembly during extrusion;
fig. 2 is a schematic diagram of the structure of the sizing block body.
In the drawings, the list of components represented by the various numbers is as follows:
1. a sizing block body; 2. extruding a blank; 3. an extrusion die; 4. thermal insulation cotton; 11. an inner hole.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Referring to fig. 1, the utility model relates to a sizing block for extrusion of a large-diameter bar without shrinkage tail, which comprises a sizing block body 1, wherein the sizing block body 1 is positioned at the lower end of an extrusion blank 2 when being extruded, and is close to one side of an extrusion rod, the sizing block body 1 and the extrusion blank 2 are both positioned in an extrusion die 3 when being extruded, the heating temperatures of the sizing block body 1 and the extrusion blank 2 are different, and heat insulation cotton 4 is placed between the sizing block body 1 and the extrusion blank 2.
Wherein, as shown in fig. 2, the shape of the sizing block body 1 is set to be cylindrical; the outer diameter of the sizing block body 1 is the same as the outer diameter of the extrusion billet 2, and the outer diameter of the sizing block body 1 is equal to the inner diameter of the extrusion die 3 minus 5-15 mm; the height of the sizing block body 1 is 5% -10% of the inner diameter of the extrusion die 3; the material of the sizing block body 1 is stainless steel when high-temperature alloy is extruded, and low-value steel Q235 is selected when titanium alloy is extruded. The sizing block body 1 is arranged, so that the extrusion rod is not in direct contact with the extrusion blank 2, the situation that the extrusion rod causes excessive extrusion force to the central position of the tail of the extrusion blank 2 is avoided, and the defects of shrinkage cavity, shrinkage tail and the like in the central position of the tail of the extrusion blank 2 are avoided.
Wherein as shown in fig. 2, an inner hole 11 is arranged on one side of the sizing block body 1 close to the extrusion billet 2, and the section shape of the inner hole 11 is arranged in an isosceles trapezoid shape; the height of the inner hole 11 is 1/2 of the height of the sizing block body 1; the angle b of the internal bore 11 is equal to the angle a of the extrusion die 3. The arrangement of the inner hole 11 avoids the direct contact between the sizing block body 1 and the center of the extrusion blank 2, solves the defects of tail shrinkage, shrinkage cavity and the like generated in the middle part in the extrusion process of large-diameter titanium alloy and high-temperature alloy bars, and improves the bar yield; and optimize angle b, the height of hole 11 and the cross-sectional shape of hole 11 for this sizing block body 1's structural strength can satisfy the extrusion requirement, and the separation area of maximize improvement sizing block body 1 and extrusion billet 2 simultaneously saves material, reduction in production cost.
The operation of this embodiment is as follows:
when the die cushion is used, the cushion iron body 1 and the extrusion blank 2 are heated to respective extrusion temperatures respectively, then the extrusion blank 2 is firstly placed into the extrusion die 3, then the heat insulation cotton 4 is placed into the end part of the extrusion blank 2, and finally the cushion iron body 1 is placed into the heat insulation cotton 4;
the sizing block body 1 is extruded through the extrusion rod, the sizing block body 1 applies thrust to the extrusion billet 2, and the extrusion billet 2 is extruded from the extrusion die 3 to form a large-diameter bar.
The foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, and any modification, equivalent replacement, and improvement of some of the technical features described in the foregoing embodiments are all within the scope of the present utility model.
Claims (7)
1. The utility model provides a sizing block for extrusion of major diameter rod no tail that contracts, includes sizing block body (1), its characterized in that:
the sizing block body (1) is positioned at the lower end of the extrusion blank (2) when being extruded, and is close to one side of the extrusion rod, and the sizing block body (1) and the extrusion blank (2) are positioned in the extrusion die (3) when being extruded;
an inner hole (11) is formed in one side, close to the extrusion blank (2), of the sizing block body (1), and the cross section of the inner hole (11) is in an isosceles trapezoid shape.
2. The sizing block for the extrusion of large-diameter bar without shrinkage tail according to claim 1, wherein the sizing block body (1) is provided in a cylindrical shape;
the outer diameter of the sizing block body (1) is the same as the outer diameter of the extrusion blank (2), and the outer diameter of the sizing block body (1) is equal to the inner diameter of the extrusion die (3) minus 5-15 mm.
3. The sizing block for the extrusion of large-diameter bars without shrinkage tail according to claim 1, wherein the height of the sizing block body (1) is 5% -10% of the inner diameter of the extrusion die (3).
4. The sizing block for the extrusion of large diameter bar without shrinkage tail according to claim 1, characterized in that the height of the inner hole (11) is 1/2 of the height of the sizing block body (1).
5. A sizing block for extrusion of large diameter bar without tail as claimed in claim 1, characterized in that the angle b of the inner bore (11) is equal to the angle a of the extrusion die (3).
6. The sizing block for the extrusion of the large-diameter bar without the shrinkage tail according to claim 1, wherein the material of the sizing block body (1) is stainless steel when extruding high-temperature alloy, and steel Q235 is selected when extruding titanium alloy.
7. The sizing block for the tail-biting-free extrusion of a large-diameter bar according to claim 1, which
Is characterized in that the heating temperature of the sizing block body (1) is different from that of the extrusion blank (2),
a heat insulation cotton (4) is arranged between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320882585.9U CN220216271U (en) | 2023-04-19 | 2023-04-19 | Sizing block for extrusion of large-diameter bar without shrinkage tail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320882585.9U CN220216271U (en) | 2023-04-19 | 2023-04-19 | Sizing block for extrusion of large-diameter bar without shrinkage tail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220216271U true CN220216271U (en) | 2023-12-22 |
Family
ID=89194702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320882585.9U Active CN220216271U (en) | 2023-04-19 | 2023-04-19 | Sizing block for extrusion of large-diameter bar without shrinkage tail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220216271U (en) |
-
2023
- 2023-04-19 CN CN202320882585.9U patent/CN220216271U/en active Active
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