CN114273592A - Method and mould for locally thickening and forming side walls of cylindrical parts with different thicknesses - Google Patents
Method and mould for locally thickening and forming side walls of cylindrical parts with different thicknesses Download PDFInfo
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- CN114273592A CN114273592A CN202111592488.8A CN202111592488A CN114273592A CN 114273592 A CN114273592 A CN 114273592A CN 202111592488 A CN202111592488 A CN 202111592488A CN 114273592 A CN114273592 A CN 114273592A
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Abstract
The invention discloses a method and a die for locally thickening the side wall of a cylindrical part with different thicknesses, wherein the method comprises the following steps: 1, placing a blank of a cylindrical metal sheet with a proper size in a female die, and driving an upper die base to move downwards to enable an inner male die, an outer male die and an upsetting male die to be in contact with the blank; 2, the upper die base moves downwards at a constant speed, the inner male die and the outer male die are static, and the upsetting male die moves downwards to shape and thicken the cylindrical part; 3, the upsetting male die continues to move downwards, and the outer male die moves upwards at the moment to locally thicken the side wall of the cylindrical part; and 4, after the side wall of the cylindrical part is locally thickened, returning the upper die base to an upper dead point, ejecting the part by the ejector rod, and finishing demoulding. The invention effectively reduces the manufacturing cost of the die, has simple structure and high production efficiency, solves the problem of buckling instability during upsetting, eliminates the defects of folding, indent and the like, and has the advantages of high dimensional precision, long service life of the die and the like.
Description
Technical Field
The invention relates to the field of plastic forming processing of metal materials, in particular to a method and a die for locally thickening the side wall of a cylindrical part with different thicknesses.
Background
In practical engineering application, a cylindrical deep-drawing part with a locally thick side wall is needed many times, but when the side wall of the cylindrical part is locally thickened, particularly when the needed local side wall is thick, the problems of buckling instability, folding and the like are considered, multiple dies are required to be replaced often to carry out upsetting treatment for multiple times to obtain needed parts, so that the production efficiency is low, and the production cost is greatly improved.
Therefore, how to change the current situations of high production cost, low production efficiency and the like when the non-uniform thickness side wall of the cylindrical part is locally thickened in the prior art becomes a problem to be solved by the technical personnel in the field
Disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and a mold for forming a cylindrical product with a partially thickened sidewall in one process.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a forming die for locally thickening the side wall of a cylindrical part, which comprises an upper die base, a discharge spring, a strong spring, a male die fixing plate, a male die base plate, an inner male die, an outer male die, an upsetting male die, a female die fixing plate, a lower die base and a mandril. The inner male die and the outer male die as well as the outer male die and the upsetting male die are coaxially arranged and are connected in a sliding mode, the inner male die is connected with the upper die base through a bolt, the powerful spring is arranged between the inner male die and the upper male die and sleeved on the bolt, the outer male die is connected with the upper die base through the bolt, the unloading spring is arranged between the outer male die and the upper male die and sleeved on the bolt, and the elasticity of the unloading spring is smaller than that of the powerful spring. The upsetting male die is connected with the upper die base through the male die fixing plate and the male die base plate.
Preferably, the inner male die and the outer male die, the outer male die and the upsetting male die, and the upsetting male die and the female die are in clearance fit.
Preferably, the inner punch and the outer punch, the outer punch and the upsetting punch are matched by H6/H5, and the upsetting punch and the female die are matched by H7/g 6.
The invention also provides a method for forming the partial thickening of the side wall with different thicknesses of the cylindrical part, which utilizes the die for forming the partial thickening of the side wall with different thicknesses of the cylindrical part and comprises the following steps:
step one, placing a metal sheet blank with a proper size of a cylindrical member in a female die, and driving an upper die base to move downwards to enable an inner male die, an outer male die and a upsetting male die to be in contact with the sheet blank;
step two, the upper die base moves downwards at a constant speed, the inner male die and the outer male die are static at the moment, and the upsetting male die moves downwards to shape and thicken the cylindrical part;
step three, the upper die base drives the upsetting male die to continue moving downwards, and the outer male die moves upwards at the moment to locally thicken the side wall of the cylindrical part;
and fourthly, after the side wall of the cylindrical part is locally thickened, the upper die base moves upwards to the upper dead point, the ejector rod moves upwards to eject the part, and demolding is finished.
Preferably, the clearance between the outer wall of the outer male die and the inner wall of the female die is 1.2-1.5 times of the thickness of the side wall of the cylindrical part.
Compared with the prior art, the invention has the following technical effects:
the invention provides a forming die for locally thickening the side walls of a cylindrical part with different thicknesses, which comprises an upper die base, a discharge spring, a strong spring, a male die fixing plate, a male die base plate, an inner male die, an outer male die, an upsetting male die, a female die fixing plate, a lower die base and a mandril. The inner male die and the outer male die as well as the outer male die and the upsetting male die are coaxially arranged and are connected in a sliding mode, the inner male die is connected with the upper die base through a bolt, the powerful spring is arranged between the inner male die and the upper male die and sleeved on the bolt, the outer male die is connected with the upper die base through the bolt, the unloading spring is arranged between the outer male die and the upper male die and sleeved on the bolt, and the elasticity of the unloading spring is smaller than that of the powerful spring. The upsetting male die is connected with the upper die base through the male die fixing plate and the male die base plate. The invention also provides a method for forming the partial thickening of the side wall of the cylindrical part with different thicknesses, when the part is formed, the prefabricated drawing part is placed in the female die, the upper die holder connected with the press is controlled to move downwards to shape and thicken the drawing part, the outer male die moves upwards under the metal extrusion force along with the downward movement of the upsetting male die, the stroke of the upper die holder is controlled to perform the partial thickening on the side wall of the cylindrical part, the height of the partial thickening is controlled, and the forming area of the outer male die can be designed into a size according to the actual requirement to control the thickness of the partial thickening. The invention realizes local thickening of the side wall of the cylindrical part in one process, effectively solves the problems of buckling instability, folding and the like, improves the production efficiency of products, and has the advantages of simple process, high forming precision and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the prior art, the drawings needed in 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 invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic sectional view of a forming mold for local thickening of a sidewall with different thicknesses of a cylindrical part according to the present invention;
fig. 2 is a sectional structure schematic diagram of the forming die for local thickening of the side wall of the cylindrical part with different thicknesses, in another working state:
FIG. 3 is a schematic view of a cylindrical member blank formed by a method of forming a non-uniform sidewall with local thickening in accordance with the present invention;
FIG. 4 is a schematic diagram of a shaped thickened plate blank when formed by a method for forming a non-uniform thickness partial thickening of a cylindrical member according to the invention;
FIG. 5 is a schematic view of a locally thickened slab formed by the method for locally thickening the side wall of a cylindrical part according to the invention;
the device comprises an upper die base, a bolt, a powerful spring, a discharging spring, an outer convex die, a male die fixing plate, an inner convex die, a male die backing plate, a female die, a lower die base, an ejector rod, a female die fixing plate, an upsetting convex die and screws, wherein the upper die base is 1, the bolt is 2, the powerful spring is 3, the discharging spring is 4, the outer convex die is 5, the male die fixing plate is 6, the inner convex die is 7, the male die backing plate is 8, the female die is 9, the lower die base is 10, the ejector rod is 11, the female die fixing plate is 12, the upsetting convex die is 13 and the screws are 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a method for locally thickening the side wall of a cylindrical part with different thicknesses, which aims to solve the problems in the prior art.
Referring to fig. 1 to 5, fig. 1 is a schematic sectional structure of a partial thickening forming mold for a non-uniform sidewall of a cylindrical member according to the present invention, fig. 2 is a schematic sectional structure of the partial thickening forming mold for the non-uniform sidewall of the cylindrical member according to the present invention in another operating state, fig. 3 is a schematic diagram of a blank of the cylindrical member during forming by using the partial thickening forming method for the non-uniform sidewall of the cylindrical member according to the present invention, fig. 4 is a schematic diagram of a blank of a deformed thickened plate during forming by using the partial thickening forming method for the non-uniform sidewall of the cylindrical member according to the present invention, and fig. 5 is a schematic diagram of a partial blank during forming by using the partial thickening forming method for the non-uniform sidewall of the cylindrical member according to the present invention.
The invention discloses a method for locally thickening and forming the side wall of a cylindrical part with different thicknesses, which comprises the following steps:
step one, placing a metal sheet blank with a proper size of a cylindrical member in a female die, and driving an upper die base to move downwards to enable an inner male die, an outer male die and a upsetting male die to be in contact with the sheet blank;
step two, the upper die base moves downwards at a constant speed, the inner male die and the outer male die are static at the moment, and the upsetting male die moves downwards to shape and thicken the cylindrical part;
step three, the upper die base drives the upsetting male die to continue moving downwards, and the outer male die moves upwards at the moment to locally thicken the side wall of the cylindrical part;
and fourthly, after the side wall of the cylindrical part is locally thickened, the upper die base moves upwards to the upper dead point, the ejector rod moves upwards to eject the part, and demolding is finished.
In the first step, the outer diameter is set to D0Height of H0Wall thickness of T0The cylindrical member blank is placed in the female die 9, the inner diameter of the female die is equal to the outer diameter of the cylindrical member blank, and the upper die base is controlled to descend, so that the inner male die, the outer male die and the upsetting male die are in contact with the sheet blank.
In the second step, the upper die base drives the upsetting male die to descend, and the cylindrical member blank is shaped and thickened to enable the height of the cylindrical member blank to be H1Thickness of T1。
In the third step, as the upsetting male die further descends, the metal flowing pressure on the side wall of the cylindrical part is increased, so that the outer male die moves upwards to obtain the local wall thickness T2The overall height is H2Local thickening height of H3The required parts of (a). In practical application, H can be controlled according to actual requirements2、H3Height and T of2Thickness of
In the fourth step, the upper die base moves upwards to the upper dead point, and the ejector rod pushes out the formed part to complete one working cycle.
In addition, the inner male die and the outer male die, the outer male die and the upsetting male die, and the upsetting male die and the female die are in clearance fit, so that the overall assembly precision of the die is improved.
In the embodiment, the inner male die and the outer male die, the outer male die and the upsetting male die are matched by H6/H5, and the upsetting male die and the female die are matched by H7/g 6.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. A forming die for locally thickening the side walls of a cylindrical part with different thicknesses is characterized by comprising an upper die base, a discharging spring, a strong spring, a male die fixing plate, a male die base plate, an inner male die, an outer male die, an upsetting male die, a female die fixing plate, a lower die base and a mandril. The inner male die and the outer male die as well as the outer male die and the upsetting male die are coaxially arranged and are connected in a sliding mode, the inner male die is connected with the upper die base through a bolt, the powerful spring is arranged between the inner male die and the upper male die and sleeved on the bolt, the outer male die is connected with the upper die base through the bolt, the unloading spring is arranged between the outer male die and the upper male die and sleeved on the bolt, and the elasticity of the unloading spring is smaller than that of the powerful spring. The upsetting male die is connected with the upper die base through the male die fixing plate and the male die base plate.
2. The die for locally thickening the side wall of the cylindrical part with different thicknesses as claimed in claim 1, wherein the inner male die and the outer male die, the outer male die and the upsetting male die, and the upsetting male die and the female die are in clearance fit.
3. The forming die for local thickening of the side wall of the cylindrical part, which is not the same as the forming die in the claim 1, is characterized in that: the clearance between the outer wall of the outer male die and the inner wall of the female die is 1.2-1.5 times of the thickness of the side wall of the cylindrical part.
4. The forming die for local thickening of the side wall of the cylindrical part, which is not the same as the forming die in the claim 1, is characterized in that: the thickness of the forming area of the outer male die can be adjusted according to practical application, and the local thickening thickness of the cylindrical side wall is controlled.
5. A method for forming a cylinder with a non-uniform thickness and a locally thickened side wall, which is used for realizing the forming die for the non-uniform thickness and the locally thickened side wall of the cylinder as claimed in any one of claims 1 to 3, and is characterized in that:
step one, placing a metal sheet blank with a proper size of a cylindrical member in the female die, and driving the upper die base to move downwards to enable the inner male die, the outer male die and the upsetting male die to be in contact with the metal sheet blank of the cylindrical member;
step two, the upper die base moves downwards at a constant speed, the inner male die and the outer male die are static at the moment, and the upsetting male die moves downwards to shape and thicken the cylindrical member metal plate base side wall;
driving the upsetting male die to continuously move downwards by the upper die holder, and then enabling the outer male die to move upwards to locally thicken the side wall of the metal plate blank of the cylindrical part;
and fourthly, after the side wall of the metal plate blank of the cylindrical part is locally thickened, the upper die base moves upwards to the upper dead point, the ejector rod moves upwards to eject the formed part, and demolding is finished.
6. The method for locally thickening and forming the side wall of the cylindrical part with different thicknesses as claimed in claim 5, wherein the method comprises the following steps:
in the third step, when the upsetting male die moves downwards and the extrusion force of the metal flow is greater than the pressure given to the outer male die by the discharge spring, the outer male die moves upwards to locally thicken the side wall of the cylindrical part.
7. The method for locally thickening and forming the side wall of the cylindrical part with different thicknesses as claimed in claim 5, wherein the method comprises the following steps:
in step three, the local thickening height of the side wall of the cylindrical part can be controlled by controlling the stroke of the upsetting male die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111592488.8A CN114273592B (en) | 2021-12-23 | 2021-12-23 | Partial thickening forming method and mold for unequal-thickness side wall of cylindrical part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111592488.8A CN114273592B (en) | 2021-12-23 | 2021-12-23 | Partial thickening forming method and mold for unequal-thickness side wall of cylindrical part |
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| Publication Number | Publication Date |
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| CN114273592A true CN114273592A (en) | 2022-04-05 |
| CN114273592B CN114273592B (en) | 2023-06-09 |
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Citations (9)
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|---|---|---|---|---|
| JP2000024745A (en) * | 1998-07-08 | 2000-01-25 | Toyota Motor Corp | Thickened pressing method |
| CN1817553A (en) * | 2006-03-14 | 2006-08-16 | 广东工业大学 | Wall thickening forming process and mould for metal thin plate local tubular projection table |
| KR100921443B1 (en) * | 2008-12-23 | 2009-10-13 | 일진금속공업 주식회사 | A method of compressor pulley for car air conditioner |
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| WO2015079846A1 (en) * | 2013-11-29 | 2015-06-04 | 新日鐵住金株式会社 | Method for forming closed-bottom cylindrical container |
| JP2017094355A (en) * | 2015-11-24 | 2017-06-01 | 日本特殊陶業株式会社 | Method for manufacturing cylindrical metal fitting with polygonal flange by cold forging |
| CN108637151A (en) * | 2018-03-17 | 2018-10-12 | 中北大学 | A kind of lightweight special-shaped shell body partial plastic forming method |
| CN112139424A (en) * | 2020-09-21 | 2020-12-29 | 湘潭大学 | Cylindrical part plate forging forming die with small round corner characteristic and method |
| CN113020516A (en) * | 2021-04-01 | 2021-06-25 | 湘潭大学 | Method and die for forging unequal-thickness metal piece plate with flange structure |
-
2021
- 2021-12-23 CN CN202111592488.8A patent/CN114273592B/en active Active
Patent Citations (9)
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| JP2000024745A (en) * | 1998-07-08 | 2000-01-25 | Toyota Motor Corp | Thickened pressing method |
| CN1817553A (en) * | 2006-03-14 | 2006-08-16 | 广东工业大学 | Wall thickening forming process and mould for metal thin plate local tubular projection table |
| KR100921443B1 (en) * | 2008-12-23 | 2009-10-13 | 일진금속공업 주식회사 | A method of compressor pulley for car air conditioner |
| CN101773975A (en) * | 2010-04-12 | 2010-07-14 | 华中科技大学 | Board upsetting and shaping die |
| WO2015079846A1 (en) * | 2013-11-29 | 2015-06-04 | 新日鐵住金株式会社 | Method for forming closed-bottom cylindrical container |
| JP2017094355A (en) * | 2015-11-24 | 2017-06-01 | 日本特殊陶業株式会社 | Method for manufacturing cylindrical metal fitting with polygonal flange by cold forging |
| CN108637151A (en) * | 2018-03-17 | 2018-10-12 | 中北大学 | A kind of lightweight special-shaped shell body partial plastic forming method |
| CN112139424A (en) * | 2020-09-21 | 2020-12-29 | 湘潭大学 | Cylindrical part plate forging forming die with small round corner characteristic and method |
| CN113020516A (en) * | 2021-04-01 | 2021-06-25 | 湘潭大学 | Method and die for forging unequal-thickness metal piece plate with flange structure |
Non-Patent Citations (1)
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| 肖小亭等: "板料局部管状凸台壁部增厚成形工艺与模具", 中国机械工程, vol. 17, pages 41 - 43 * |
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| CN114273592B (en) | 2023-06-09 |
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