CN113385573B - High-precision cylindrical part drawing forming die and application thereof - Google Patents
High-precision cylindrical part drawing forming die and application thereof Download PDFInfo
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- CN113385573B CN113385573B CN202110669936.3A CN202110669936A CN113385573B CN 113385573 B CN113385573 B CN 113385573B CN 202110669936 A CN202110669936 A CN 202110669936A CN 113385573 B CN113385573 B CN 113385573B
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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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- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a high-precision cylindrical part drawing forming die and application thereof, the die is used for drawing a plate (14) into a cylindrical part, the cylindrical part sequentially comprises a side wall (141) and a cylindrical bottom (142) which are integrally formed, and the die comprises: the lower template (1) and the upper template (13) are positioned correspondingly; a male die (8) and a female die which are matched with each other; the female die supporting seat (6) is used for loading a female die; the elastic supporting mechanism is used for supporting the formed cylinder bottom (142) in the forming process of the plate (14); the male die (8) is fixedly arranged below the upper die plate (13), and the elastic supporting mechanism and the female die supporting seat (6) are fixedly arranged on the lower die plate (1); during drawing, the cylinder bottom (142) is simultaneously abutted with the punch (8) and the elastic supporting mechanism; the inner side of the side wall (141) is abutted against the punch (8), and the outer side of the side wall (141) is abutted against the die. Compared with the prior art, the method can improve the dimensional accuracy of the deep-drawing formed cylindrical part and provide a relevant solution for practical production.
Description
Technical Field
The invention relates to the technical field of sheet stamping and forming, in particular to a high-precision cylindrical part deep drawing and forming die.
Background
With the continuous progress of science and technology, the precision requirement of products is higher and higher, and the traditional manufacturing process faces great challenges. As a typical part or blank with wide application, the traditional manufacturing process of a cylindrical part is plate drawing forming, and is limited by factors such as material performance, forming process, convex die round angle, concave die round angle, convex-concave die gap, resilience and the like, the traditional drawing forming cylindrical part has limited precision in the aspects of cylinder bottom flatness, side wall taper, cross section roundness, wall thickness and the like, and the precision can only be improved by increasing forming procedures or machining processes and the like, so that the material flow line is incomplete, the service performance of the product is reduced, the material utilization rate is low, the production efficiency is low, the production cost is increased, the traditional drawing forming cylindrical part cannot meet the requirements of mass, low-cost and high-precision production of modern products, and the wide application of the product is limited.
In view of the above-mentioned current situation and disadvantages, it is necessary to develop a high-precision cylindrical-part deep-drawing mold and manufacture a high-quality and high-precision cylindrical part.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-precision cylindrical part deep drawing forming die which can improve and improve the dimensional precision of a deep drawing formed cylindrical part and provide a relevant solution for practical production.
The purpose of the invention can be realized by the following technical scheme:
the invention improves the forming precision of the cylindrical part and realizes the near net forming or net forming of the high-precision cylindrical part with less cutting; the surface quality and the service performance of the cylindrical part are improved, the material utilization rate is improved, the energy consumption is reduced, the manufacturing process flow is shortened, and the quality of the formed part is ensured and stabilized; promote low-cost big batch, high-efficient production of high accuracy cylinder, promote the large-scale application of precision forming technique to promote the technological progress and the rapid development of precision plastic forming technique and relevant trade, the concrete scheme is as follows:
a high accuracy section of thick bamboo drawing forming die, this mould is used for drawing the sheet material into a section of thick bamboo, and this section of thick bamboo includes integrative lateral wall and the bobbin base of taking shape in proper order, the mould include:
the lower template and the upper template are positioned correspondingly;
a male die and a female die which are matched with each other;
the female die supporting seat is used for loading a female die;
the elastic supporting mechanism is used for supporting the formed cylinder bottom in the sheet forming process;
the male die is fixedly arranged below the upper template, and the elastic supporting mechanism and the female die supporting seat are fixedly arranged on the lower template;
during drawing, the cylinder bottom is simultaneously abutted with the male die and the elastic supporting mechanism; the inner side of the side wall is abutted to the male die, and the outer side of the side wall is abutted to the female die.
Furthermore, a female die working belt is arranged above the inner edge of the female die, and a male die working belt is arranged on the outer edge of the end part of the male die;
during drawing, the inner side of the side wall is abutted against the male die working belt, and the outer side of the side wall is abutted against the female die working belt.
The distance between the female die working belt and the male die working belt in the horizontal direction, namely the clearance between the male die and the female die, is changed along with the change of the drawing stroke.
Furthermore, the female die is provided with a plurality of fan-shaped female die sliding blocks which are arranged in the circumferential direction, and the die further comprises a sliding sleeve which is used for driving the fan-shaped female die sliding blocks to move towards the circle center;
the sliding sleeve is fixedly arranged below the upper die plate, and is sleeved outside the fan-shaped female die sliding block and abutted against the fan-shaped female die sliding block in the drawing process.
Along with the downward movement of the male die, the conical surface of the sliding sleeve extrudes the conical surface on the outer side of the fan-shaped female die sliding block to push the fan-shaped female die sliding block to slide in the contact plane of the fan-shaped female die sliding block and the female die supporting seat along the direction of the central shaft of the cylindrical part, and the side wall of the cylindrical part deforms in the direction of the central shaft of the cylindrical part to perform lateral springback compensation on the cylindrical part.
Furthermore, the outer edge of the sector female die sliding block is a conical surface with an upward direction, and the shape of the inner edge of the sliding sleeve is matched with that of the outer edge of the sector female die sliding block.
Furthermore, the elastic supporting mechanism comprises a mandril capable of moving up and down, a compressible elastic cushion block and a lower backing plate, the elastic cushion block and the mandril are arranged on the lower template, the mandril penetrates through the elastic cushion block, and the lower backing plate is positioned at the upper part of the mandril;
during drawing, the cylinder bottom is simultaneously abutted with the male die and the lower backing plate.
Along with the downward movement of the male die, the elastic cushion block is compressed to generate pressure, and the lower cushion plate applies pressure to the cylinder bottom of the cylindrical part, so that the dimensional accuracy of the cylinder bottom of the cylindrical part is improved. The ejector rod is placed on the equipment, only penetrates through the elastic cushion block, and can move upwards under the driving of the equipment.
Furthermore, a discharging plate is arranged below the upper die plate, is annular, is positioned on the outer side of the male die and is connected with the upper die plate through an elastic element;
when unloading, the unloading plate is abutted against the opening part of the cylindrical part.
In the forming process, after the male die moves downwards for a certain distance, the stripper plate is contacted with the plate material, and the elastic element is compressed to generate downward pressure; after the forming is finished, the male die drives the cylindrical part to move upwards, and the stripper plate generates downward pressure on the opening part of the cylindrical part under the pressure action of the elastic element to carry out unloading action, so that the high-precision cylindrical part is obtained.
Furthermore, the edge of the lower template is fixedly provided with a guide pillar for assisting the lower template to be matched with the upper template in relative position, and the guide pillar penetrates through the upper template and is in sliding abutting joint with the upper template.
Furthermore, the edge of the upper template is fixedly provided with a guide sleeve matched with the lower template and the upper template in relative position, and the guide sleeve is in sliding butt joint with the guide pillar.
Furthermore, the female die supporting seat is fixedly arranged on the lower template through bolts.
The application of the high-precision cylindrical part deep drawing forming die is used for drawing a sheet material into a cylindrical part, and the cylindrical part sequentially comprises a side wall and a cylindrical bottom which are integrally formed.
Compared with the prior art, the invention obviously improves the dimensional accuracy of the cylindrical part, realizes the near-net forming of the high-accuracy cylindrical part, improves the surface quality and service performance of the cylindrical part, improves the material utilization rate, reduces the energy consumption, shortens the manufacturing process flow and ensures and stabilizes the quality of the formed part by developing the high-accuracy cylindrical part deep drawing forming die and the forming method for lateral springback compensation and applying pressure to the bottom of the cylinder; promote the low-cost mass and high-efficiency production of high-precision cylindrical parts, promote the large-scale application of a precision forming technology, and promote the technical progress and rapid development of the precision plastic forming technology and related industries.
Drawings
FIG. 1 is a sectional view of a mold in the example;
FIG. 2 is a sectional view of the mold before stretching in the example;
FIG. 3 is a first perspective view of the mold in the example;
FIG. 4 is a second perspective view of the mold in the example;
FIG. 5 is a sectional view showing the die in the example when stretched;
FIG. 6 is a schematic view of a cylindrical product in an embodiment;
indicated by reference numerals in the figures; the device comprises a lower template 1, a guide pillar 2, a push rod 3, an elastic cushion block 4, a lower cushion plate 5, a female die supporting seat 6, a fan-shaped female die sliding block 7, a female die working belt 71, a male die 8, a male die working belt 81, a sliding sleeve 9, a discharging plate 10, an elastic element 11, a guide sleeve 12, an upper template 13, a plate material 14, a side wall 141 and a cylinder bottom 142.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
A high precision cylindrical deep drawing die, fig. 1-4, for drawing sheet 14 into a cylindrical shape comprising, in sequence, integrally formed side walls 141 and a bottom 142, fig. 5-6, the die comprising:
the lower template 1 and the upper template 13 are positioned correspondingly; a male die 8 for forming the sheet 14 into a cylindrical bottom 142; the female die is used for forming the plate 14 into a side wall 141; the female die supporting seat 6 is used for loading a female die; the elastic supporting mechanism is used for supporting the formed cylinder bottom 142 in the sheet forming process; the male die 8 is fixedly arranged below the upper template 13, and the elastic supporting mechanism and the female die supporting seat 6 are fixedly arranged on the lower template 1; in this embodiment, the female die supporting seat 6 is fixedly arranged on the lower template 1 through bolts.
In the drawing process, the cylinder bottom 142 is simultaneously abutted with the punch 8 and the lower backing plate 5 of the elastic supporting mechanism; the inside of the side wall 141 abuts against the punch 8, and the outside of the side wall 141 abuts against the die.
A convex female die working belt 71 is arranged above the inner edge of the female die, and a male die working belt 81 is arranged at the outer edge of the end part of the male die 8; in the drawing process, the inner side of the side wall 141 is abutted with the punch working tape 81, and the outer side of the side wall 141 is abutted with the die working tape 71; the distance between the die work belt 71 and the punch work belt 81 in the horizontal direction, that is, the punch-die gap, changes with the drawing stroke.
The female die is provided with a plurality of fan-shaped female die sliding blocks 7 arranged in the circumferential direction, and the die further comprises a sliding sleeve 9 for driving the fan-shaped female die sliding blocks 7 to move towards the circle center; the sliding sleeve 9 is fixedly arranged below the upper die plate 13, and in the drawing process, the sliding sleeve 9 is sleeved outside the fan-shaped female die sliding block 7 and is abutted against the fan-shaped female die sliding block 7. The outer edge of the fan-shaped female die sliding block 7 is a conical surface with an upward direction, and the shape of the inner edge of the sliding sleeve 9 is matched with the outer edge of the fan-shaped female die sliding block 7.
The elastic supporting mechanism comprises an ejector rod 3, an elastic cushion block 4 and a lower backing plate 5, the elastic cushion block 4 and the ejector rod 3 are arranged on the lower template 1, the ejector rod 3 is arranged in the elastic cushion block 4 in a penetrating mode, and the lower backing plate 5 is fixedly arranged at the end portion of the ejector rod 3; during drawing, the tube bottom 142 abuts against the punch 8 and the lower pad 5 at the same time.
A stripper plate 10 is also arranged below the upper template 13, the stripper plate 10 is annular, is positioned outside the male die 8 and is connected with the upper template 13 through an elastic element 11; when discharging, the stripper plate 10 abuts against the cylindrical opening.
The edge of the lower template 1 is fixedly provided with a guide pillar 2 matched with the relative position of the auxiliary lower template 1 and the upper template 13, and the guide pillar 2 penetrates through the upper template 13 and is in sliding butt joint with a guide sleeve 12 fixedly arranged on the upper template 13.
As shown in fig. 5, the high-precision cylindrical drawing process for lateral springback compensation is as follows:
(1) Placing the plate 14 on the fan-shaped concave die sliding block 7;
(2) The upper template 13 drives the male die 8, the sliding sleeve 9 and the discharging plate 10 to move downwards, and the male die 8 contacts the plate 14 to perform drawing forming on the cylindrical part;
(3) Along with the downward movement of the male die 8, the conical surface of the sliding sleeve 9 extrudes the conical surface of the outer edge of the fan-shaped female die sliding block 7 to push the fan-shaped female die sliding block 7 to slide in the contact plane of the fan-shaped female die sliding block and the female die supporting seat 6 along the radial direction towards the central axis direction of the cylindrical part, and the side wall 141 of the cylindrical part deforms towards the central axis direction of the cylindrical part to perform lateral springback compensation on the cylindrical part;
(4) Along with the downward movement of the male die 8, the elastic cushion block 4 is compressed to generate upward pressure, and the lower cushion plate 5 applies pressure to the bottom of the cylindrical part, so that the dimensional accuracy of the bottom 142 of the cylindrical part is improved;
(5) After the male die 8 moves downwards for a certain distance, the stripper plate 10 is contacted with the plate material 14, and the elastic element 11 is compressed to generate downward pressure;
(6) After the drawing stroke of the plate reaches 60mm, the male die 8 drives the cylindrical part to move upwards, and the fan-shaped female die sliding block 7 slides in the direction far from the central axis of the cylindrical part along the radial direction of the cylindrical part in the contact plane of the fan-shaped female die sliding block and the female die supporting seat 6 under the action of the radial resilience force far from the central axis of the cylindrical part, which is generated by the resilience of the side wall 141 of the cylindrical part;
(7) Along with the upward movement of the male die 8, under the pressure action of the elastic element 11 at the upper part of the stripper plate 10, the stripper plate 10 generates downward pressure on the opening part of the cylindrical part to carry out the unloading action, so as to obtain the high-precision cylindrical part, the product schematic diagram and the dimensional tolerance requirements are shown in fig. 6, and the product is made of a material with the brand name of SAPH440 and the thickness of 4mm.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. A high precision cylindrical drawing die for drawing a sheet material (14) into a cylindrical member comprising in sequence a side wall (141) and a bottom (142) formed integrally, said die comprising:
the lower template (1) and the upper template (13) are positioned correspondingly;
a male die (8) and a female die which are matched with each other;
the female die supporting seat (6) is used for loading a female die;
the elastic supporting mechanism is used for supporting the formed cylinder bottom (142) in the forming process of the plate (14);
the male die (8) is fixedly arranged below the upper die plate (13), and the elastic supporting mechanism and the female die supporting seat (6) are fixedly arranged on the lower die plate (1);
during drawing, the cylinder bottom (142) is simultaneously abutted with the male die (8) and the elastic supporting mechanism; the inner side of the side wall (141) is abutted against the male die (8), and the outer side of the side wall (141) is abutted against the female die;
a female die working belt (71) is arranged above the inner edge of the female die, and a male die working belt (81) is arranged on the outer edge of the end part of the male die (8);
during drawing, the inner side of the side wall (141) is abutted with the punch working belt (81), and the outer side of the side wall (141) is abutted with the die working belt (71);
the female die is provided with a plurality of fan-shaped female die sliding blocks (7) which are arranged in the circumferential direction, and the die further comprises a sliding sleeve (9) which is used for driving the fan-shaped female die sliding blocks (7) to move towards the circle center;
the outer edge of the fan-shaped female die sliding block (7) is a conical surface with an upward direction, and the shape of the inner edge of the sliding sleeve (9) is matched with that of the outer edge of the fan-shaped female die sliding block (7);
the sliding sleeve (9) is fixedly arranged below the upper template (13), during deep drawing, the sliding sleeve (9) is sleeved outside the fan-shaped female die sliding block (7) and is abutted against the fan-shaped female die sliding block (7), the side wall (141) of the cylindrical part deforms towards the central axis direction of the cylindrical part, lateral springback compensation is carried out on the cylindrical part, and the size precision of the cylindrical part is obviously improved;
the elastic supporting mechanism comprises an ejector rod (3) capable of moving up and down, a compressible elastic cushion block (4) and a lower backing plate (5), the elastic cushion block (4) and the ejector rod (3) are arranged on the lower template (1), the ejector rod (3) penetrates through the elastic cushion block (4), and the lower backing plate (5) is positioned on the upper part of the ejector rod (3);
during drawing, the cylinder bottom (142) is simultaneously abutted with the punch (8) and the lower backing plate (5); the elastic cushion block (4) is compressed to generate upward pressure, and the lower cushion plate (5) applies pressure to the bottom of the cylindrical part, so that the dimensional accuracy of the cylindrical bottom (142) of the cylindrical part is improved.
2. A high-precision cylindrical member deep drawing forming die as claimed in claim 1, wherein a stripper plate (10) is further arranged below the upper die plate (13), the stripper plate (10) is annular, is positioned outside the male die (8), and is connected with the upper die plate (13) through an elastic element (11);
when discharging, the discharging plate (10) is abutted against the opening part of the cylindrical part.
3. The high-precision cylindrical part deep drawing forming die as claimed in claim 1, wherein guide pillars (2) matching with the upper die plate (13) in relative positions are fixedly arranged at the edge of the lower die plate (1), the guide pillars (2) penetrate through the upper die plate (13) and are in sliding abutting joint with the upper die plate (13).
4. A high precision cylindrical piece deep drawing forming die according to claim 3, characterized in that the edge of the upper template (13) is fixedly provided with a guide sleeve (12) matching with the relative position of the auxiliary lower template (1) and the upper template (13), and the guide sleeve (12) is in sliding contact with the guide pillar (2).
5. A high accuracy cylinder deep drawing forming die according to claim 1, characterized in that, the female die supporting seat (6) is fixed on the lower template (1) by bolts.
6. Use of a high-precision cylindrical deep-drawing die according to any one of claims 1 to 5 for deep-drawing a sheet (14) into a cylindrical piece comprising, in succession, a side wall (141) and a bottom (142) which are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669936.3A CN113385573B (en) | 2021-06-17 | 2021-06-17 | High-precision cylindrical part drawing forming die and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669936.3A CN113385573B (en) | 2021-06-17 | 2021-06-17 | High-precision cylindrical part drawing forming die and application thereof |
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| Publication Number | Publication Date |
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| CN113385573A CN113385573A (en) | 2021-09-14 |
| CN113385573B true CN113385573B (en) | 2022-10-14 |
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| CN202110669936.3A Active CN113385573B (en) | 2021-06-17 | 2021-06-17 | High-precision cylindrical part drawing forming die and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100885977B1 (en) * | 2007-07-04 | 2009-03-03 | (주) 정광기술 | Crown-forming apparatus of pulley for vehicle |
| CN102430649A (en) * | 2011-10-31 | 2012-05-02 | 湖南大学 | Die structure for stretching at negative angle |
| JP6069223B2 (en) * | 2011-12-22 | 2017-02-01 | 新日鐵住金株式会社 | Press molded product |
| CN105251889B (en) * | 2015-11-25 | 2017-05-17 | 重庆持恒模具有限公司 | Bending mold |
| CN207288610U (en) * | 2017-09-25 | 2018-05-01 | 安徽工程大学 | A kind of straight wall cylinder punch-forming mold with hemisphere bottom |
| CN109985969A (en) * | 2019-04-17 | 2019-07-09 | 广东长盈精密技术有限公司 | Bending Mould |
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