CN113210513B - Deep-drawing die of deep-drawing piece with flange - Google Patents
Deep-drawing die of deep-drawing piece with flange Download PDFInfo
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- CN113210513B CN113210513B CN202110648291.5A CN202110648291A CN113210513B CN 113210513 B CN113210513 B CN 113210513B CN 202110648291 A CN202110648291 A CN 202110648291A CN 113210513 B CN113210513 B CN 113210513B
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- die
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- lever structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a deep drawing die of a deep drawing part with a flange, which relates to the field of material processing and mainly comprises a female die, a male die, an upper template fixedly connected with the female die, a lower template fixedly connected with the male die, a pressure lever and a lever structure; the bottom of the male die is in contact with one end of the lever structure; the device comprises an upper template and a lower template, and is characterized in that a screw hole is formed in one side edge of the upper template, a through hole is formed in the concentric position of the screw hole of the upper template, one end of a pressing rod is connected with the screw hole of the upper template in a threaded fit mode, and the other end of the pressing rod penetrates through the through hole of the lower template and can move up and down so as to be in contact with the other end of the lever structure. According to the technical scheme, when the subsequent drawing of multiple times of drawing is performed on the cylindrical part, the lever structure enables the punch-die to perform relative motion according to a certain proportion of speed, so that the flange of the workpiece is kept still, the blank pressing structure of the drawing die is simplified, and the forming quality is improved.
Description
Technical Field
The invention relates to the field of material processing, in particular to a deep drawing die of a deep drawing piece with a flange.
Background
Due to the wide applicability of drawing parts in various fields, the research on drawing process in China is also becoming deeper and deeper. Various matched die structures are researched for various drawing workpieces, but immature problems still exist for the design of drawing dies with certain structures. The parts formed by the drawing process have good product appearance and service performance, and although the parts are widely applied to related industries such as medical treatment, automobiles, ships, nuclear power and the like, the requirements on drawn parts are increasingly large and are increasingly strict along with the development of the society. Further, many drawn parts having a relatively large height-diameter ratio cannot be drawn at one time, and thus drawing is required to be performed several times.
At present, many multi-time deep-drawing parts do not have flanges, the design of a die for the parts is not difficult, and some parts with the flanges and needing multi-time deep-drawing are provided, but for the parts, the flange parts of the parts are not easy to process in the subsequent deep-drawing process after the first deep-drawing, if the proper edge pressing cannot be carried out, the flanges can generate serious deformation, but the edge pressing for the flanges of the semi-finished parts is not well designed on the structure of the die, because the flanges can generate certain displacement along with the movement of a male die or a female die in the deep-drawing process, the requirement that the edge pressing ring moves along with the flanges and applies enough edge pressing force while moving is difficult to achieve for the common die, so that many parts can adopt reverse deep-drawing in the second process, but the deep-drawing mode is only suitable for the more regular shapes, if the workpiece is irregular in shape or does not satisfy axial symmetry, the flange may be severely deformed when the flange is reversely drawn to the root of the flange.
Disclosure of Invention
In view of the above, the present invention provides a deep drawing die for a deep-drawing part with a flange, wherein a lever mechanism is used to make a punch and a die perform relative motion at a certain ratio so as to keep the flange of a workpiece stationary, so as to simplify the blank holding structure of the deep drawing die, improve the forming quality, and avoid the flange from deforming due to the movement of the flange in the multiple deep-drawing processes.
Therefore, the invention provides the following technical scheme:
the invention provides a deep drawing die of a deep drawing part with a flange, which mainly comprises a female die, a male die, an upper template fixedly connected with the female die, a lower template fixedly connected with the male die, a pressure lever and a lever structure, wherein the male die is fixedly connected with the lower template;
the bottom of the male die is in contact with one end of the lever structure;
the device comprises an upper template and a lower template, and is characterized in that a screw hole is formed in one side edge of the upper template, a through hole is formed in the concentric position of the screw hole of the upper template, one end of a pressing rod is connected with the screw hole of the upper template in a threaded fit mode, and the other end of the pressing rod penetrates through the through hole of the lower template and can move up and down so as to be in contact with the other end of the lever structure.
Furthermore, the lever structure mainly comprises a fulcrum, a fulcrum shaft sleeve, a square lever, a first ball head and a second ball head; the fulcrum is arranged on the fulcrum shaft sleeve; the square bar penetrates through the fulcrum shaft sleeve and can slide in the fulcrum shaft sleeve; the first ball head and the second ball head are respectively positioned on two sides of the square bar and are in threaded connection with the square bar;
correspondingly, the bottom of the male die is in contact with the first ball head; the pressure lever is in contact with the second ball head.
Further, when the drawing die is used, the speed ratio v of the female die to the male die is determinedConcave:vConvex partD, (D-D) setting the length proportion of force arms at two sides of the lever fulcrum; wherein v isConcaveIs the down speed, v, of the female dieConvex partThe upward speed of the male die, D is the diameter of a target drawing part, and D is the diameter of a cylindrical workpiece;
controlling the female die to be vConcaveMoving downwards, the male die is driven by the lever structure to move in vConvex partMoving upwards.
Further, the fulcrum is of a slidable structure.
Further, the lever structure is arranged at the bottom of the lower template.
Furthermore, the lever structure is independently processed and placed at a corresponding position below the die, and four supports with the same height are placed at four corners of the lower die plate to reserve enough space for the lever structure.
The invention has the advantages and positive effects that: according to the technical scheme, when the cylindrical part is subjected to subsequent drawing of multiple times of drawing, the punch-die and the die are subjected to relative motion at a certain proportion speed through the lever structure, so that the flange of the workpiece is kept still, the blank pressing structure of the drawing die is simplified, and the forming quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a two-dimensional schematic diagram of the overall structure of a drawing die of a drawing part with a flange in the embodiment of the invention;
fig. 2(a) is a three-dimensional schematic diagram of the whole structure of a drawing die of a drawing part with a flange in the embodiment of the invention;
fig. 2(b) is a three-dimensional schematic diagram of the whole structure of a drawing die of a drawing part with a flange in the embodiment of the invention;
FIG. 3 is a two-dimensional schematic diagram of a lever structure according to an embodiment of the present invention;
FIG. 4 is a three-dimensional schematic diagram of a lever structure according to an embodiment of the present invention;
FIG. 5 is a schematic view of the descending of a stationary male die and a stationary female die in the embodiment of the invention;
FIG. 6 is a schematic diagram of the upward movement of the stationary male die of the female die in the embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the conventional deep drawing die is used for performing multiple deep drawing to form multiple deep drawing parts, the female die is generally controlled to move downwards through external force, the male die is kept still, a flange of a workpiece can be formed during the first deep drawing, the flange can possibly generate displacement due to different deep drawing depths during the second deep drawing, and the flange can deform in different degrees, so that the forming quality is influenced. Therefore, the invention provides a new blank holder structure scheme by carrying out design research on the blank holder structure of a flanged drawing piece on the basis of the multi-pass drawing principle of a plate material.
Referring to fig. 1 and fig. 2(a), fig. 2(b), there is shown an overall structural schematic diagram of a drawing die of a drawing part with a flange in an embodiment of the present invention; the deep drawing die mainly comprises a female die 6, a male die 5, an upper template 1 fixedly connected with the female die 6, a lower template 2 fixedly connected with the male die 5, a pressure lever 3 and a lever structure 4;
a screw hole is formed in the edge of one side of the upper template 1, a through hole is formed in the lower template 2 and the screw hole of the upper template 1 at the same center, one end of the pressure rod 3 is in threaded fit connection with the screw hole of the upper template 1, and the other end of the pressure rod 3 penetrates through the through hole of the lower template 2 and can move up and down so as to be in contact with the other end of the lever structure 4;
the bottom of the male die 5 is in contact with one end of the lever structure 4.
Wherein the lever structure 4 is a core part of the drawing die. As shown in fig. 3 and 4, the lever structure mainly includes four parts, namely, a fulcrum 4-1, a fulcrum shaft sleeve 4-2, a square bar 4-3 and a ball head (a first ball head 4-4 and a second ball head 4-5, wherein the first ball head 4-4 is a contact point of the lever structure 4 and the bottom of the male die 5, and the second ball head 4-5 is a contact point of the lever structure 4 and the press rod 3). The square bar 4-3 can slide in the fulcrum shaft sleeve 4-2 to adjust the distribution of the force arms on the two sides. The lever structure 4 can be arranged at the bottom of the lower template 2, and can also be independently processed and placed at the corresponding position below the die, and at the moment, four supports with the same height are placed at four corners of the lower template 2 to reserve enough space for the lever structure. In addition, a groove enough for the lever to enter and exit is dug at the corresponding position of the lever of the lower template 2, and enough space for the lever structure to rise is provided at the side contacted with the male die.
When the deep drawing die is used for deep drawing, the speed ratio v of the female die to the male die is determinedConcave:vConvex partD, (D-D) setting the length proportion of force arms at two sides of the lever fulcrum; wherein v isConcaveIs the down speed of the die, vConvex partThe upward speed of the male die, D the diameter of the target drawn part and D the diameter of the cylindrical workpiece; controlling the concave die by external force to form vConcaveMove downwards, convexThe die is matched in a counter bore matched with the lower die plate with a certain clearance and has the capability of moving up and down, and the male die is matched with the counter bore of the lower die plate with v under the action of the lever structure 4Convex partMoving upwards.
The principle of the drawing die for the flange-equipped drawing material will be described in detail below.
As shown in fig. 5 and 6, the diameter of the cylindrical workpiece is D, the height is H (H '), the diameter of the target cylindrical part is D, the downward moving depth of the female die is H, and the upward moving height of the male die is H'. Assuming that a male die is kept still and a female die moves downwards in the drawing process, a workpiece flange generates a section of downward displacement (H-H); and when the female die is kept still and the male die moves upwards, the flange of the workpiece can generate upward displacement H'. Therefore, if the punch and die can be moved toward each other simultaneously during drawing to make the downward displacement and the upward displacement of the workpiece flange equal, the workpiece flange can be made to be stationary during drawing.
Order:
h-H＝H′ (1)
according to the forming principle of the multi-pass deep drawing process, the area of the wall of the workpiece and the area of the wall of the resulting workpiece barrel are equal, and the following steps are provided:
πdh＝πDH (2)
πdh′＝πDH′ (3)
the united type (1), (2) and (3) can obtain:
h:h′＝d:(D-d) (4)
the ratio of displacement to velocity is obtained from the relationship between displacement and velocity.
It is possible to obtain, in the same time:
h:h′＝vconcave:vConvex part (5)
I.e. the ratio of displacement equals the ratio of speed in the same time, the ratio of speed of the female die to the male die is obtained according to equation (4):
vconcave:vConvex part＝d:(D-d) (6)
After the speed proportion is determined, a lever structure is arranged below a lower die plate of the die by utilizing a lever principle, the length proportion of force arms on two sides can be adjusted to be a numerical value corresponding to the formula (6) by sliding a lever fulcrum, and the proportion of a cylindrical part with an irregular cross section can fluctuate a little, so that the lever fulcrum is made into a slidable structure so as to adjust the length proportion of the lever on two sides at any time.
The drawing process using the drawing die of the drawn piece with flange in the above embodiment will be specifically described below. Firstly, adjusting the initial positions of the punch and the die to ensure that the punch and the die just contact the plate; then, the respective displacements are determined from the initial positions of the dies and the dimensions of the respective parts. The required parts are prepared after the size is determined, the diameter of the press rod is calculated to ensure that the press rod cannot be unstable in the drawing process, and the length of the press rod meets the requirement that the press rod can just contact the ball head of the lever when the punch and die are at the initial position. The lever fulcrum and the fulcrum shaft sleeve are increased in wall thickness as much as possible to ensure strength, the strength of the square bar is determined not to be bent after bending moment calculation, the length of the square bar can meet the distribution of force arms at two sides, the gravity center of the ball head can be aligned to the gravity center of the pressing rod and the gravity center of the male die in the longitudinal direction, finally, a groove enough for the lever to pass in and out is dug at the position of the lower template lever, and all required parts are prepared according to the standard. After the die and the lever are assembled, the male die and the female die are ensured to have freedom degrees in the vertical direction so as to move in opposite directions, and the upper die plate is provided with a pressure rod which is required to touch one end of the lever. And then one end of the lever is contacted with one end of the male die, the length proportion of the force arms on the two sides is adjusted to be the value corresponding to the formula (6) by sliding the lever fulcrum, and the proportion of the cylindrical part with an irregular section possibly fluctuates a little, so that the lever fulcrum is made into a slidable structure so as to adjust the length proportion of the levers on the two sides at any time. And drawing can be started after the integral stability of the die is ensured. In the drawing process, the female die is controlled by external force to form a VConcaveCarry out the downstream, the depression bar of being connected with the cope match-plate pattern of fixed die this moment can follow the die downstream, also can downstream with the lever one end of depression bar contact, the other end of lever then can upwards be upwardsMoving, the male die contacting the other end will be forced upward by the lever with vConvex partAnd moving upwards. The lever structure makes the punch and die move relatively in certain speed, so that the flange of the workpiece has equal upward displacement and downward displacement, and the flange of the workpiece is maintained.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A deep drawing die of a deep drawing part with a flange is characterized by mainly comprising a female die, a male die, an upper template fixedly connected with the female die, a lower template fixedly connected with the male die, a pressure lever and a lever structure;
the bottom of the male die is in contact with one end of the lever structure;
a screw hole is formed in one side edge of the upper template, a through hole is formed in the lower template and the upper template at the concentric position of the screw hole, one end of the pressure lever is in threaded fit connection with the screw hole of the upper template, and the other end of the pressure lever penetrates through the through hole of the lower template and can move up and down so as to be in contact with the other end of the lever structure;
the lever structure mainly comprises a fulcrum, a fulcrum shaft sleeve, a square lever, a first ball head and a second ball head; the fulcrum is arranged on the fulcrum shaft sleeve; the square bar penetrates through the fulcrum shaft sleeve and can slide in the fulcrum shaft sleeve; the first ball head and the second ball head are respectively positioned on two sides of the square bar and are in threaded connection with the square bar;
correspondingly, the bottom of the male die is in contact with the first ball head; the pressure lever is in contact with the second ball head.
2. Drawing tool for flanged deep-drawn parts according to claim 1, characterized in that, when the drawing tool is used, the speed ratio v between the female die and the male die is usedConcave:vConvex partD, (D-D) setting the length proportion of force arms at two sides of the lever fulcrum; wherein v isConcaveIs the down speed, v, of the female dieConvex partThe upward speed of the male die, D is the diameter of a target drawing part, and D is the diameter of a cylindrical workpiece;
controlling the female die to be vConcaveMoving downwards, the male die is driven by the lever structure to move in vConvex partMoving upwards.
3. A drawing die for a flanged drawing member according to claim 1, wherein the fulcrum is of slidable construction.
4. Deep-drawing die for a flanged deep-drawing part according to claim 1, characterized in that the lever structure is arranged at the bottom of the lower die plate.
5. A drawing die for a flanged drawing part according to claim 1, characterised in that the lever structure is independently machined and placed at a corresponding position below the die, and four supports of equal height are placed at the four corners of the lower die plate to leave sufficient space for the lever structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110648291.5A CN113210513B (en) | 2021-06-10 | 2021-06-10 | Deep-drawing die of deep-drawing piece with flange |
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| CN202110648291.5A CN113210513B (en) | 2021-06-10 | 2021-06-10 | Deep-drawing die of deep-drawing piece with flange |
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| CN113210513A CN113210513A (en) | 2021-08-06 |
| CN113210513B true CN113210513B (en) | 2022-03-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114247791A (en) * | 2021-12-27 | 2022-03-29 | 昆山市易密斯电子材料有限公司 | Multi-section shaper for beryllium copper reed |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3685935A (en) * | 1970-03-10 | 1972-08-22 | Janos Kurucz | Apparatus for manufacturing bearings that are to be used particularly in the watchmaking industry and for small apparatuses |
| JPS58145312A (en) * | 1982-02-22 | 1983-08-30 | Toyota Motor Corp | Press die capable of upward and downward bendings |
| CN101091975A (en) * | 2007-07-23 | 2007-12-26 | 重庆大学 | Restriction boost type mould for introversive tube |
| CN103433368A (en) * | 2013-07-19 | 2013-12-11 | 亿森（上海）模具有限公司 | Mechanism for finishing upturning and trimming of outer covering member of automobile in one process |
| CN104368696A (en) * | 2014-11-25 | 2015-02-25 | 奇瑞汽车股份有限公司 | Compartment part forming die and machining method |
| CN207205037U (en) * | 2017-09-11 | 2018-04-10 | 深圳市国兰塑胶五金制品有限公司 | One kind plays segment difference mould |
-
2021
- 2021-06-10 CN CN202110648291.5A patent/CN113210513B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3685935A (en) * | 1970-03-10 | 1972-08-22 | Janos Kurucz | Apparatus for manufacturing bearings that are to be used particularly in the watchmaking industry and for small apparatuses |
| JPS58145312A (en) * | 1982-02-22 | 1983-08-30 | Toyota Motor Corp | Press die capable of upward and downward bendings |
| CN101091975A (en) * | 2007-07-23 | 2007-12-26 | 重庆大学 | Restriction boost type mould for introversive tube |
| CN103433368A (en) * | 2013-07-19 | 2013-12-11 | 亿森（上海）模具有限公司 | Mechanism for finishing upturning and trimming of outer covering member of automobile in one process |
| CN104368696A (en) * | 2014-11-25 | 2015-02-25 | 奇瑞汽车股份有限公司 | Compartment part forming die and machining method |
| CN207205037U (en) * | 2017-09-11 | 2018-04-10 | 深圳市国兰塑胶五金制品有限公司 | One kind plays segment difference mould |
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Effective date of registration: 20230104 Address after: No. 377, Laodong East Road, Tianning District, Changzhou City, Jiangsu Province, 213000 Patentee after: Purumai Electromechanical Manufacturing (Changzhou) Co.,Ltd. Address before: 066004 No. 438 west section of Hebei Avenue, seaport District, Hebei, Qinhuangdao Patentee before: Yanshan University |