CN114602991A - Extrusion die and die cushion matching structure - Google Patents
Extrusion die and die cushion matching structure Download PDFInfo
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- CN114602991A CN114602991A CN202210432592.9A CN202210432592A CN114602991A CN 114602991 A CN114602991 A CN 114602991A CN 202210432592 A CN202210432592 A CN 202210432592A CN 114602991 A CN114602991 A CN 114602991A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 89
- 230000005489 elastic deformation Effects 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000027455 binding Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009870 specific binding Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
- B21C25/025—Selection of materials therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention relates to the technical field of aluminum profile extrusion dies, and discloses a matching structure of an extrusion die and a die pad, which comprises the extrusion die and the die pad which are assembled together. Through practical production verification, after the matching mode of the extrusion die and the die pad provided by the invention is used, when some wide and thin section bar frameworks or cantilever section bars with larger tongue ratios are extruded, the elastic deformation of the extrusion die can be reduced by 30-80% compared with a plane matching structure, the dimensional precision is easier to ensure, and the deformation condition of the extruded section bars is greatly reduced.
Description
Technical Field
The invention relates to the technical field of aluminum profile extrusion dies, in particular to a matching structure of an aluminum alloy extrusion die and a die pad.
Background
As the application of extruded aluminum profiles becomes more and more widespread, the structural design of the aluminum profiles becomes more and more complex. In the prior art, a common matching structure of an extrusion die 01 and a die pad 02 is shown in fig. 1. When some wide and thin profile structures or cantilever profiles with a large tongue ratio are extruded, the extrusion die 01 is subjected to a large forward pressure during the extrusion process due to a large pressure-bearing surface of the extrusion die 01, and when the strength of the extrusion die 01 is lower than the pressure, the extrusion die 01 elastically deforms, as shown in fig. 2.
However, for the precision part of the extrusion die, since the dimensional tolerance of the corresponding industrial extruded aluminum profile is very small, the size of the extruded aluminum profile which is very easy to be caused by the deformation of the die is changed, and thus the requirement of a customer cannot be met. In addition, because the flow condition of the metal in the die must be comprehensively considered in the design of the extrusion die, the friction distances, the lengths, the thicknesses and the like of the working belts at different positions are important influencing factors, and various factors need to be considered for design to ensure the flow velocity balance. However, after the die is elastically deformed, the thickness of the wall is changed, and the angle of the working belt is also greatly changed, so that the flowing speed of metal in the die is greatly influenced, and the problems of deformation, size change and the like of the extruded aluminum profile are caused.
In order to solve this problem, the following solutions are generally adopted in the prior art: 1) the distance between the rear empty cutter of the die and the working belt is reduced, and the supporting force is increased; 2) using higher strength die steel; thickening the die; 3) using a more conformable die pad, etc. However, these conventional measures cannot prevent the elastic deformation of the mold itself, and only reduce the elastic deformation as much as possible, and thus the effect is not preferable.
In view of this, how to reduce the elastic deformation of the die by a better method, and then improve the dimensional stability of the discharged section bar, and reduce the deformation of the discharged section bar has very important meaning.
Disclosure of Invention
The invention aims to provide a matching structure of an extrusion die and a die pad, which has the advantages of small deformation of the die in the extrusion process, and high dimensional stability and precision of an extruded section.
In order to achieve the purpose, the invention adopts the following technical scheme.
The utility model provides a cooperation structure of extrusion die and die cushion, is including the extrusion die and the die cushion of assembly together, its characterized in that the back dead knife position of extrusion die is equipped with the proud cover post of outside the die cushion is equipped with the cover groove, the cover post gomphosis in the cover inslot, the cover groove is used for preventing the extrusion die elastic deformation to the outside.
More preferably, the shape of the sleeve connection column is consistent with that of the sleeve connection groove, the bus and the axis of the sleeve connection column are parallel to each other, and a flat embedding structure is arranged between the sleeve connection column and the sleeve connection groove.
More preferably, the socketing post is cylindrical; the circumcircle of the extrusion section is within 30% of the circumcircle of the die pad, and the protruding length of the sleeve column does not exceed 30% of the thickness of the thinner one of the extrusion die and the die pad.
More preferably, the sleeving connection column is in an elliptic cylinder shape or a rectangular parallelepiped shape; the protruding length of the sleeve connecting column is not more than 20% of the thickness of the thinner one of the extrusion die and the die pad, and the minimum wall thickness of the sleeve connecting groove is not less than 20% of the diameter of the circumscribed circle of the die pad.
More preferably, the shape of the sleeve connecting column is consistent with that of the sleeve connecting groove, the sleeve connecting column is in a frustum shape with a large end and a small end, and an inclined embedding structure is arranged between the sleeve connecting column and the sleeve connecting groove.
More preferably, the socketing post is cylindrical; the circumscribed circle of the extruded profile is within 60% of the circumscribed circle of the die pad, and the protruding length of the sleeving column is not more than 30% of the thickness of the thinner one of the extrusion die and the die pad.
More preferably, the sleeving connection column is in an elliptic frustum shape or a rectangular frustum shape; the protruding length of the sleeve connecting column is not more than 25% of the thickness of the thinner one of the extrusion die and the die pad, and the minimum wall thickness of the sleeve connecting groove is not less than 15% of the diameter of the circumscribed circle of the die pad.
More preferably, the projection length of the socket post is not greater than the depth of the socket groove.
More preferably, the die pad is made of H13 steel with the hardness of 44-52 HRC.
More preferably, the bottom corner of the sleeving groove is of a rounded structure.
The invention has the beneficial effects that: the long-term practical research of the inventor shows that the traditional extrusion die and the die cushion are matched in a plane mode, and the stress between the traditional extrusion die and the die cushion is only in one horizontal direction. Although the extrusion die is bounded by the die sleeve on the outside and by the die holder on the further outside. However, because the material strength of the die sleeve is lower than that of the extrusion die, and the die holder cannot fully wrap the binding die, when the central pressure is too high, the elastic deformation towards the outer side still occurs because of the hollow structure of the hollow knife behind the extrusion die, and even the extrusion die is blocked on the die holder in serious cases.
Therefore, on the basis of the traditional plane matching structure, the invention additionally adds a restraining sleeve to the rear blank part of the extrusion die, thereby preventing the extrusion die from elastically deforming outwards. The specific binding mode is as follows: the rear hollow cutter part of the extrusion die is provided with a sleeving column protruding outwards, the die pad is provided with a sleeving groove, the sleeving column is embedded in the sleeving groove, and the external elastic deformation of the extrusion die is prevented by the sleeving groove, so that the deformation of the die is effectively reduced, and the size stability and the precision of the extruded section are higher. Through practical production verification, after the matching mode of the extrusion die and the die pad provided by the invention is used, when some wide and thin section bar frameworks or cantilever section bars with larger tongue ratios are extruded, the elastic deformation of the extrusion die can be reduced by 30-80% compared with a plane matching structure, the dimensional precision is easier to ensure, and the deformation condition of the extruded section bars is greatly reduced.
Drawings
Fig. 1 is a schematic view illustrating a conventional structure of an extrusion die and a die pad.
Fig. 2 is a schematic view of the extrusion die of fig. 1 after elastic deformation.
Fig. 3 is a schematic view of a matching structure of an extrusion die and a die pad according to embodiment 1 of the present invention.
Fig. 4 is a schematic view of a matching structure of an extrusion die and a die pad according to embodiment 2 of the present invention.
Reference numerals indicate the same.
01: extrusion die, 02: and (5) die cushion.
1: extrusion die, 2: and (5) die cushion.
1-1: a sleeving connection column, 1-2: rear empty part, 2-1: the groove is sleeved.
Detailed Description
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the feature, and in the description of the invention, "at least" means one or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the present invention, unless otherwise specified and limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.
The following describes the embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages thereof are more clear and clear. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The long-term practical research of the inventor shows that the traditional extrusion die and the die cushion are matched in a plane mode, and the stress between the traditional extrusion die and the die cushion is only in one horizontal direction. Although the extrusion die is bounded by the die sleeve on the outside and by the die holder on the further outside. However, since the material strength of the die sleeve is lower than that of the extrusion die, and the die holder cannot fully wrap the binding die, when the central pressure is too high, the hollow structure of the hollow knife behind the extrusion die still causes outward elastic deformation, and in a serious case, the extrusion die is even clamped on the die holder.
Therefore, the invention provides that on the basis of the traditional plane matching structure, a restraining sleeve is additionally arranged at the rear blank part of the extrusion die, so that the elastic deformation of the extrusion die towards the outer side is prevented. The invention is described in detail below by two different designs of the collar structure.
Example 1.
As shown in fig. 3, a matching structure of an extrusion die and a die pad comprises an extrusion die 1 and a die pad 2 which are assembled together, wherein a sleeve post 1-1 which protrudes outwards is arranged at a rear hollow position 1-2 of the extrusion die 1, a sleeve groove 2-1 is arranged on the die pad 2, the sleeve post 1-1 is embedded in the sleeve groove 2-1, and the sleeve groove 2-1 is used for preventing the extrusion die from elastically deforming outwards.
In this embodiment, the splicing column 1-1 and the splicing groove 2-1 are in a flat-embedded structure, and an embedding gap between the splicing column 1-1 and the splicing groove can be set according to actual needs. Here, the flush structure means: the generatrix and the axis of the sleeve column 1-1 are parallel to each other, and the shape of the sleeve groove 2-1 is consistent with that of the sleeve column 1-1. For example, the sleeve connection column 1-1 and the sleeve connection groove 2-1 are both cylindrical structures.
In particular, for the best restraint against elastic deformation, it is preferable that the circumscribed circle of the extruded profile is within 30% of the circumscribed circle of the die pad, and it is preferable that the projection length of the hitching post 1-1 is not more than 30% of the thickness of the thinner one of the extrusion die 1 and the die pad 2. Thus, the thickness of the side edge of the die pad 2 can provide sufficient support strength.
If the extruded section is in a wide and thin structure, namely under the condition of large circumcircle but small height, the sleeving column 1-1 can be designed into an elliptic cylinder or a cuboid, the minimum wall thickness of the sleeving groove 2-1 is designed to be not less than 20% of the diameter of the circumcircle of the die pad 2, and the protruding length of the sleeving column 1-1 is designed to be not more than 20% of the thickness of the thinner one of the extrusion die 1 and the die pad 2; to ensure that the socket 2-1 can provide sufficient support strength.
Obviously, in other embodiments, according to different actual needs, the sleeving connection column and the sleeving connection groove can be set to be other irregular columnar shapes as long as the sleeving connection groove and the sleeving connection column can be mutually embedded and the extrusion die is prevented from elastically deforming outwards; and are not limited to the above examples.
Further, it is preferable that the projection length of the socket post 1-1 is not greater than the depth of the socket groove 2-1. Thus, the extrusion die 1 and the die pad 2 can be attached to each other after being assembled together, and the best effect of preventing the extrusion die from elastically deforming to the outside is achieved.
Further, it is preferable that the die pad 2 is made of H13 steel with a hardness of 44-52HRC to ensure sufficient strength to restrain the deformation of the extrusion die 1. Preferably, the bottom corner of the sleeve joint groove 2-1 is of a fillet structure, so that tearing caused by overlarge local stress is avoided.
Example 2.
Referring to fig. 4, the matching structure of the extrusion mold and the die pad provided in this embodiment is substantially the same as that in embodiment 1, except that an inclined embedding structure is formed between the splicing column 1-1 and the splicing groove 2-1, that is, the splicing column 1-1 and the splicing groove 2-1 are both in the shape of a frustum with a large end and a small end.
When the sleeving column 1-1 and the sleeving groove 2-1 are in an obliquely embedded structure, the section cavity of the extrusion die can be made larger, and the extrusion die is suitable for extrusion dies with the extruded section circumscribed circle within 60% of the die pad circumscribed circle; also, the projection length of the socket post 1-1 at this time is not more than 30% of the thickness of the thinner one of the extrusion die 1 and the die pad 2. Thus, the thickness of the side edge of the die pad 2 can provide sufficient support strength.
If the extruded section is in a wide and thin structure, namely under the condition that the circumscribed circle is large but the height is small, the sleeving column 1-1 can be designed into an elliptical cone-like shape, the minimum wall thickness of the sleeving groove 2-1 is designed to be not less than 15% of the diameter of the circumscribed circle of the die pad 2, and the protruding length of the sleeving column 1-1 is designed to be not more than 25% of the thickness of the thinner one of the extrusion die 1 and the die pad 2; to ensure that the socket 2-1 can provide sufficient support strength.
Through practical production verification, after the matching mode of the extrusion die and the die pad provided by the invention is used, when some wide and thin section bar frameworks or cantilever section bars with larger tongue ratios are extruded, the elastic deformation of the extrusion die can be reduced by 30-80% compared with a plane matching structure, the dimensional precision is easier to ensure, and the deformation condition of the extruded section bars is greatly reduced.
It will be appreciated by those skilled in the art from the foregoing description of construction and principles that the invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the teachings of the art may be made without departing from the scope of the invention as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.
Claims (10)
1. The utility model provides a cooperation structure of extrusion die and die cushion, is including the extrusion die and the die cushion of assembly together, its characterized in that the back dead knife position of extrusion die is equipped with the proud cover post of outside the die cushion is equipped with the cover groove, the cover post gomphosis in the cover inslot, the cover groove is used for preventing the extrusion die elastic deformation to the outside.
2. The matching structure of an extrusion die and a die pad as claimed in claim 1, wherein the shape of the sleeve post is the same as that of the sleeve groove, the generatrix and the axis of the sleeve post are parallel to each other, and the sleeve post and the sleeve groove are of a flush structure.
3. The mating structure of an extrusion die and a die pad as set forth in claim 2, wherein said spigot post is cylindrical; the circumscribed circle of the extruded profile is within 30% of the circumscribed circle of the die pad, and the protruding length of the sleeving column is not more than 30% of the thickness of the thinner one of the extrusion die and the die pad.
4. The matching structure of an extrusion die and a die pad as claimed in claim 2, wherein the sleeve column is in an elliptic cylinder shape or a rectangular parallelepiped shape; the protruding length of the sleeve connecting column is not more than 20% of the thickness of the thinner one of the extrusion die and the die pad, and the minimum wall thickness of the sleeve connecting groove is not less than 20% of the diameter of the circumscribed circle of the die pad.
5. The matching structure of an extrusion die and a die pad as claimed in claim 1, wherein the shape of the connection pillar is identical to that of the connection groove, the connection pillar is in the shape of a frustum with a large end and a small end, and an inclined embedding structure is arranged between the connection pillar and the connection groove.
6. The mating structure of an extrusion die and a die pad as set forth in claim 5, wherein said spigot post is cylindrical; the circumscribed circle of the extruded profile is within 60% of the circumscribed circle of the die pad, and the protruding length of the sleeving column is not more than 30% of the thickness of the thinner one of the extrusion die and the die pad.
7. The matching structure of an extrusion die and a die pad as claimed in claim 5, wherein the socket post is in an elliptical frustum shape or a rectangular frustum shape; the protruding length of the sleeve connecting column is not more than 25% of the thickness of the thinner one of the extrusion die and the die pad, and the minimum wall thickness of the sleeve connecting groove is not less than 15% of the diameter of the circumscribed circle of the die pad.
8. The engagement structure of an extrusion die and a die pad as set forth in claim 1, wherein the projection length of the socket post is not greater than the depth of the socket groove.
9. The combination of an extrusion die and a die pad as set forth in claim 1, wherein said die pad is made of H13 steel with a hardness of 44-52 HRC.
10. The matching structure of the extrusion die and the die pad as claimed in claim 1, wherein the bottom corner of the receiving groove is in a rounded structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210432592.9A CN114602991A (en) | 2022-04-22 | 2022-04-22 | Extrusion die and die cushion matching structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210432592.9A CN114602991A (en) | 2022-04-22 | 2022-04-22 | Extrusion die and die cushion matching structure |
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| Publication Number | Publication Date |
|---|---|
| CN114602991A true CN114602991A (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210432592.9A Pending CN114602991A (en) | 2022-04-22 | 2022-04-22 | Extrusion die and die cushion matching structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000015325A (en) * | 1998-07-02 | 2000-01-18 | Denso Corp | Die for extrusion for microporous tube |
| CN102371287A (en) * | 2010-08-26 | 2012-03-14 | 哈尔滨建成集团有限公司 | Extrusion die and method for extrusion molding inside and outside reduction blank by same |
| US20130186162A1 (en) * | 2012-01-20 | 2013-07-25 | Tsung-Hsien Huang | Mold for extruding an aluminum seat of a heat sink and a method for making the same |
| CN206154575U (en) * | 2016-11-15 | 2017-05-10 | 深圳市欣迪盟新能源科技股份有限公司 | Secondary somatotype mould structure |
| CN208944852U (en) * | 2018-10-19 | 2019-06-07 | 佛山市顺德区永晟模具有限公司 | Aluminium guide rail mold on sister block sliding door |
| CN217070211U (en) * | 2022-04-22 | 2022-07-29 | 广东澳美铝业有限公司 | Extrusion die and die pad matching structure |
-
2022
- 2022-04-22 CN CN202210432592.9A patent/CN114602991A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000015325A (en) * | 1998-07-02 | 2000-01-18 | Denso Corp | Die for extrusion for microporous tube |
| CN102371287A (en) * | 2010-08-26 | 2012-03-14 | 哈尔滨建成集团有限公司 | Extrusion die and method for extrusion molding inside and outside reduction blank by same |
| US20130186162A1 (en) * | 2012-01-20 | 2013-07-25 | Tsung-Hsien Huang | Mold for extruding an aluminum seat of a heat sink and a method for making the same |
| CN206154575U (en) * | 2016-11-15 | 2017-05-10 | 深圳市欣迪盟新能源科技股份有限公司 | Secondary somatotype mould structure |
| CN208944852U (en) * | 2018-10-19 | 2019-06-07 | 佛山市顺德区永晟模具有限公司 | Aluminium guide rail mold on sister block sliding door |
| CN217070211U (en) * | 2022-04-22 | 2022-07-29 | 广东澳美铝业有限公司 | Extrusion die and die pad matching structure |
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