CN111531014A - Pulse type hydro-mechanical deep drawing device and method for complex curved surface thin-wall part - Google Patents
Pulse type hydro-mechanical deep drawing device and method for complex curved surface thin-wall part Download PDFInfo
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- CN111531014A CN111531014A CN202010449383.6A CN202010449383A CN111531014A CN 111531014 A CN111531014 A CN 111531014A CN 202010449383 A CN202010449383 A CN 202010449383A CN 111531014 A CN111531014 A CN 111531014A
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- die
- cavity
- liquid
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- pushing piece
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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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
- B21D26/031—Mould construction
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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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
Abstract
The invention discloses a pulsating hydro-mechanical drawing device for a complex curved surface thin-wall part, which comprises a drawing punch-die and a drawing die and is characterized in that: the deep drawing female die consists of a lower die cushion block and a lower die core which are positioned at the lower part, the middle part of the lower die core is provided with a die cavity which is arranged according to the shape of a product, the lower die cushion block is provided with a liquid filling port which is connected with the die cavity, the deep drawing male die consists of an upper die core which is arranged at the middle part and a pressure plate push rod which is arranged at the outer side of the upper die core, a pushing piece moving cavity is arranged inside the upper die core, a pushing piece block which is arranged according to the shape of the product is arranged in the pushing piece moving cavity, the pushing piece can move in the pushing piece moving cavity, and the depth of the cavity of the pushing piece moving cavity.
Description
Technical Field
The invention relates to the technical field of metal sheet forming, in particular to a pulse type hydro-mechanical deep drawing device and method for a complex curved surface thin-wall part.
Background
The metal sheet forming is a processing process of processing the metal sheet into thin-wall parts with different shapes and sizes and good performance by a certain tool and a processing method. Compared with other methods of mechanical processing and plastic processing, the equipment and the process used for punching and forming the thin plate are relatively simple, and the method has the advantages of high productivity, high material utilization rate, high dimensional precision, good interchangeability, simple operation, easy realization of mechanization and automation and the like in the aspects of technology and economy. Therefore, the thin plate punch forming is an important branch of pressure processing, and has extremely wide application in the fields of aerospace, automobiles, electronic instruments, hardware and household appliances and the like.
The complex curved surface thin-wall part is a key component of a carrier such as aerospace, military industry, rockets, airplanes and automobiles, and the material, the geometric shape, the dimensional accuracy and the like of the component directly influence the indexes such as the pneumatic performance, the bearing capacity, the effective load, the fuel consumption and the like of equipment. Therefore, in addition to new functional materials such as high-strength aluminum (lithium) alloy, titanium alloy, intermetallic compound, and high-temperature alloy, these parts need to adopt some special processing techniques to satisfy the requirements of integration, thinning and complicated geometric configuration, and have been developed to large-scale, light-weight, high-speed, long-life, and high-reliability. However, the components are characterized in that the materials are difficult to deform, the shapes are complex and the high performance are mutually coupled, the manufacturing difficulty is very high, the components are directly formed by the traditional method, the components are easy to crack during forming, the wall thickness of the products is not uniform, and the forming method of the traditional stamping, drawing or drawing and the like cannot be fundamentally solved. Therefore, the development of a new forming method and tooling equipment thereof has important significance.
Disclosure of Invention
The invention discloses a pulsating hydro-mechanical deep drawing device and method for a complex curved surface thin-wall part, which are used for solving the defects of the prior art.
In order to solve the problems, the technical solution of the invention is as follows:
the utility model provides a device of complicated curved surface thin wall part pulsed hydromechanical deep drawing, including deep-drawing punch-die and deep-drawing die, the deep-drawing die by be located the lower mould cushion and the lower core group constitution of lower part, the die cavity that sets up according to the product shape is provided with in the middle part of the lower mould core, be provided with the liquid filling mouth of connecting the die cavity on the lower mould cushion, deep-drawing punch-die is by setting up the last mold core at the middle part and setting up the pressure flitch push rod in the last mold core outside and constitute, and the inside push away piece motion chamber that is provided with of last mold core, be provided with the ejector pad that establishes according to the product shape in the ejector pad motion chamber, the ejector pad can move in the ejector pad motion chamber, the degree of depth of the cavity.
The method comprises the following steps:
(1) mounting the drawing convex-concave die and the drawing concave die on a forming machine;
(2) filling liquid-filling liquid into the die cavity through the liquid-filling port, and placing the plate on the drawing female die;
(3) starting a machine to enable the drawing convex-concave die to move downwards, enabling the pressing plate push rod to press the plate above the drawing concave die, and stopping the pressing plate push rod;
(4) the upper mold core and the piece pushing block continue to move downwards, the downward stretching size is the stretching height size H1, at the moment, the space of the mold cavity is reduced due to the downward movement of the upper mold core and the piece pushing block, the liquid filling liquid in the mold cavity flows out through the liquid filling port, and the first forming of the plate is finished;
(5) the upper mold core and the piece pushing block reversely move upwards to reach the height dimension H of the product, and then the upper mold core stops moving;
(6) and pressurizing the liquid-filled liquid into the die cavity through the liquid-filled port by a pressurizing machine, and continuously moving the pushing block upwards to the reverse stretching height H2 under the action of pressure to finish the second molding.
(7) After the molding is finished, the pressure is released by the pressurizing machine, so that the liquid pressure in the mold cavity is not stressed any more,
(8) and the drawing punch-die and the drawing die move upwards integrally to separate the drawing punch-die and the drawing die, and the drawing punch-die is taken out finally after being restored to the initial state.
The material pressing plate push rod and the pushing piece block are respectively controlled by independent hydraulic oil cylinders.
The stretched height dimension H1 is greater than the product height dimension H.
The depth of the mold cavity is greater than the draw height dimension H1.
The invention has the beneficial effects that: by adopting the pulsating hydro-mechanical deep drawing method, the accurate forming of the complex sheet part can be realized by effectively controlling the related parts of the die to do intermittent motion and performing hydro-mechanical deep drawing forming on the complex curved surface part of the metal sheet, the die structure is simplified (a male die or a female die is saved), the forming efficiency is improved, and the processing cost is saved.
Drawings
FIG. 1 is a schematic representation of the apparatus of the present invention prior to molding;
FIG. 2 is a schematic view of the apparatus of the present invention in a first molding configuration;
FIG. 3 is a schematic view of the apparatus of the present invention in a second molding operation;
FIG. 4 is a schematic view of a molded product according to the present invention;
in the figure: 1-drawing punch and die, 2-drawing die, 11-upper die core, 12-pressure plate push rod, 13-pushing piece, 14-pushing piece moving cavity, 21-lower die cushion block, 22-lower die core, 23-die cavity, 24-liquid filling port, H-product height dimension, H1-drawing height dimension, H2-reverse drawing height, 3-plate, 31-product convex part and 32-product concave part.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Referring to the attached drawings 1-4, the deep drawing die comprises a deep drawing punch-die 1 and a deep drawing die 2, wherein the deep drawing die 2 consists of a lower die cushion block 21 and a lower die core 22 which are positioned at the lower part, a die cavity 23 which is arranged according to the shape of a product is arranged in the middle of the lower die core 22, a liquid filling port 24 which is connected with the die cavity 23 is arranged on the lower die cushion block 21, the deep drawing punch-die 1 consists of an upper die core 11 which is arranged in the middle and a pressure plate push rod 12 which is arranged outside the upper die core 11, a pushing piece moving cavity 14 is arranged inside the upper die core 11, a pushing piece 13 which is arranged according to the shape of the product is arranged in the pushing piece moving cavity 14, the pushing piece 13 can move in the pushing piece moving cavity 14, and the depth of the cavity of the pushing piece moving cavity.
The method comprises the following steps:
(1) mounting a drawing punch-die 1 and a drawing die 2 on a forming machine;
(2) filling liquid into the die cavity 23 through the liquid filling port 24, and placing the plate 3 on the drawing female die 2;
(3) starting a machine to enable the drawing punch-die 1 to move downwards, enabling the pressure plate push rod 12 to press the plate 3 above the drawing die 2, and then stopping the pressure plate push rod 12;
(4) the upper die core 11 and the pushing block 13 continue to move downwards, the downward stretching size is the stretching height size H1, at this time, the liquid filling liquid in the die cavity 23 is reduced due to the downward movement of the upper die core 11 and the pushing block 13, the space of the die cavity 23 is reduced, the liquid filling liquid in the die cavity flows out through the liquid filling port 24, and at this time, the first forming of the plate 3 is completed;
(5) the upper die core 11 and the pushing piece block 13 reversely move upwards to reach the height dimension H of the product, and then the upper die core 11 stops moving;
(6) and pressurizing the liquid-filled liquid into the die cavity 23 through the liquid-filled port 24 by using a pressurizing machine, and continuously moving the pushing piece 13 upwards to the reverse stretching height H2 under the action of pressure to finish the second molding.
(7) After the molding is finished, the pressure is released by the pressurizing machine, so that the liquid pressure in the die cavity 23 is not stressed any more,
(8) and the drawing punch-die 1 integrally moves upwards to separate the drawing punch-die 1 from the drawing die 2, and the drawing punch-die 1 is taken out finally after being restored to the initial state.
The material pressing plate push rod 12 and the pushing piece block 13 are respectively controlled by independent hydraulic oil cylinders.
The stretched height dimension H1 is greater than the product height dimension H.
The depth of the mold cavity 23 is greater than the draw height dimension H1.
In practical application, the final product formed by the plate 3 has a product convex portion 31 and a product concave portion 32, the first forming is to form the product convex portion 31, and the second forming is to form the product concave portion 32 in a reverse direction.
When the first forming is carried out to hydro-mechanical deep drawing to form the outer convex part 31 of the product, on the premise of ensuring that the deformation degree of the material is within the forming limit range, the actual stretching height is larger than the height of the product, so that enough material is mainly reserved for the inner concave part 32 of the subsequent formed product, when the second forming is carried out to carry out the pressurization hydro-mechanical deep drawing to form the inner concave part 32 of the product, the flowing of the material in the deep drawing process is mainly obtained by reducing the height of the redundant part of the first forming, and the height of the redundant part of the first forming is determined by the size of the inner concave part 32 of the product.
The secondary forming of the invention can effectively form the product with a convex-concave complex structure, the formed wall thickness is uniform, the surface finish is good, and the forming of various complex structures can be completed by one set of module, thereby saving a male die or a female die.
The pulsation liquid filling forming realizes the forming of the plate by adjusting and controlling the position of a working part, filling liquid and increasing and decreasing liquid pressure in real time, can solve the problem that complex curved surface parts needing multi-process forming are filled with liquid and deep-drawn in a set of die, the blank holder force in the liquid filling and deep-drawing process is adjustable and controllable, a pressure plate push rod 12 and a piece pushing block 13 are generally controlled by an independent hydraulic oil cylinder to be determined according to the actual thickness, material and complexity of a product, the action and stroke of a deep-drawing punch-die 1 are adjustable and controllable, namely the downward stretching of an upper die core 11 can be realized, the inward reverse stretching of the piece pushing block 13 can also be realized, the pulsation liquid filling and deep-drawing can be realized, and the forming can be realized according to different heights of the product through. The positive and negative deep drawing of concave and convex surfaces at different positions is realized by the pulsating pressurization of the liquid filling liquid, the material is provided by the formed shell side surface when the product concave part 32 is formed, the material is easy to flow and form, the material is gradually contacted with a die for forming by the receding of the concave and convex die when the product convex part 31 and the product concave part 32 are formed, the flow resistance in the material forming process is reduced, the forming is favorable, the whole product can be shaped by the liquid filling pressurization, the precision of the processed part is also enhanced, the pressure maintaining setting can be carried out on the liquid filling liquid in the die cavity 23 according to the actual product requirement in the final process, the product rebound is prevented, the precision of the product is improved, the internal stress of the product is reduced, and the more complicated product is obtained, and the pressure maintaining time.
Because the pressure plate push rod 12 and the pushing block 13 are respectively controlled by independent hydraulic oil cylinders and are independent from the upper die core 11, the product is generally on the upper die core 11 after the final drawing punch-die 1 is separated from the drawing die 2, and the product can be ejected from the upper die core 11 by the pushing block 13 through the relative movement of the pushing block 13 and the upper die core 11.
By adopting the pulse type hydro-mechanical deep drawing method, the related parts of the die are effectively controlled to do intermittent motion, and the hydro-mechanical deep drawing forming of the metal sheet complex curved surface part is performed, so that the precise forming of the complex sheet part can be realized, the internal stress of a product is reduced, the die structure is simplified (a male die or a female die is saved), the forming efficiency is improved, and the processing cost is saved.
The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.
Claims (5)
1. The utility model provides a device of complicated curved surface thin wall part pulsed hydromechanical deep drawing, includes deep-drawing punch-die and deep-drawing die, its characterized in that: the deep drawing female die consists of a lower die cushion block and a lower die core which are positioned at the lower part, the middle part of the lower die core is provided with a die cavity which is arranged according to the shape of a product, the lower die cushion block is provided with a liquid filling port which is connected with the die cavity, the deep drawing male die consists of an upper die core which is arranged at the middle part and a pressure plate push rod which is arranged at the outer side of the upper die core, a pushing piece moving cavity is arranged inside the upper die core, a pushing piece block which is arranged according to the shape of the product is arranged in the pushing piece moving cavity, the pushing piece can move in the pushing piece moving cavity, and the depth of the cavity of the pushing piece moving cavity.
2. A pulsating hydro-mechanical deep drawing method for a complex curved surface thin-wall part is characterized by comprising the following steps:
(1) mounting the drawing convex-concave die and the drawing concave die on a forming machine;
(2) filling liquid-filling liquid into the die cavity through the liquid-filling port, and placing the plate on the drawing female die;
(3) starting a machine to enable the drawing convex-concave die to move downwards, enabling the pressing plate push rod to press the plate above the drawing concave die, and stopping the pressing plate push rod;
(4) the upper mold core and the piece pushing block continue to move downwards, the downward stretching size is the stretching height size H1, at the moment, the space of the mold cavity is reduced due to the downward movement of the upper mold core and the piece pushing block, the liquid filling liquid in the mold cavity flows out through the liquid filling port, and the first forming of the plate is finished;
(5) the upper mold core and the piece pushing block reversely move upwards to reach the height dimension H of the product, and then the upper mold core stops moving;
(6) and pressurizing the liquid-filled liquid into the die cavity through the liquid-filled port by a pressurizing machine, and continuously moving the pushing block upwards to the reverse stretching height H2 under the action of pressure to finish the second molding.
(7) After the molding is finished, the pressure is released by the pressurizing machine, so that the liquid pressure in the mold cavity is not stressed any more,
(8) and the drawing punch-die and the drawing die move upwards integrally to separate the drawing punch-die and the drawing die, and the drawing punch-die is taken out finally after being restored to the initial state.
3. The pulsating hydro-mechanical deep drawing device for the complex curved surface thin-wall part according to claim 1 is characterized in that: the material pressing plate push rod and the pushing piece block are respectively controlled by independent hydraulic oil cylinders.
4. The pulsating hydro-mechanical deep drawing method for the complex curved surface thin-wall part according to claim 2 is characterized in that: the stretched height dimension H1 is greater than the product height dimension H.
5. The pulsating hydro-mechanical deep drawing method for the complex curved surface thin-wall part according to claim 2 is characterized in that: the depth of the mold cavity is greater than the draw height dimension H1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010449383.6A CN111531014A (en) | 2020-05-25 | 2020-05-25 | Pulse type hydro-mechanical deep drawing device and method for complex curved surface thin-wall part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010449383.6A CN111531014A (en) | 2020-05-25 | 2020-05-25 | Pulse type hydro-mechanical deep drawing device and method for complex curved surface thin-wall part |
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| CN111531014A true CN111531014A (en) | 2020-08-14 |
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| CN202010449383.6A Pending CN111531014A (en) | 2020-05-25 | 2020-05-25 | Pulse type hydro-mechanical deep drawing device and method for complex curved surface thin-wall part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130883A (en) * | 2021-11-16 | 2022-03-04 | 武汉理工大学 | Stainless steel metal bipolar plate hydraulic forming method for pulse loading auxiliary hydrogen fuel cell |
-
2020
- 2020-05-25 CN CN202010449383.6A patent/CN111531014A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130883A (en) * | 2021-11-16 | 2022-03-04 | 武汉理工大学 | Stainless steel metal bipolar plate hydraulic forming method for pulse loading auxiliary hydrogen fuel cell |
| CN114130883B (en) * | 2021-11-16 | 2024-01-09 | 武汉理工大学 | Hydraulic forming method for stainless steel metal bipolar plate of pulse loading auxiliary hydrogen fuel cell |
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