CN111434409A - Hydraulic forming process for flexible cross beam type pull rod locking plate - Google Patents
Hydraulic forming process for flexible cross beam type pull rod locking plate Download PDFInfo
- Publication number
- CN111434409A CN111434409A CN201910032265.2A CN201910032265A CN111434409A CN 111434409 A CN111434409 A CN 111434409A CN 201910032265 A CN201910032265 A CN 201910032265A CN 111434409 A CN111434409 A CN 111434409A
- Authority
- CN
- China
- Prior art keywords
- die
- hydraulic
- locking
- water injection
- pull rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- B21D26/025—Means for controlling the clamping or opening of the moulds
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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
- B21D26/027—Means for controlling fluid parameters, e.g. pressure or temperature
-
- 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
Abstract
The invention provides a hydraulic forming process for a flexible cross beam type pull rod locking plate, which comprises the following process flows of: the equipment beam is driven by a die assembly oil cylinder and the like to rapidly descend so as to drive the die to reach a preset closing point; under the coordination of the die and the rapid water injection system, a motor, a hydraulic or pneumatic driving device and the like drive the screw to rotate to realize the coordination of the locking screw and the locking nut, so that the upper die overcomes the forming resistance of a workpiece to complete forming, water injection and die assembly; after the die is closed to the end, the inner pressurization system works under the coordination of the action of the die, and the locking screw serves as a pull rod to provide the locking force of the die so as to complete the hydraulic bulging of the workpiece; after the internal pressurization system releases the pressure, the axial cylinder exits from the working position, the die closing oil cylinder and the like drive the equipment beam and the upper die to rapidly move upwards, and the die is opened to take away the workpiece. The invention realizes the light weight of the plate hydraulic forming equipment and the die, provides the die locking force by using the locking screw rod as the pull rod, has lower cost and faster production beat, and ensures the product quality.
Description
Technical Field
The invention mainly relates to the technical field of hydraulic forming, in particular to a hydraulic forming process for a flexible cross beam type pull rod locking plate, which is suitable for hydraulic forming of metal plates such as steel, aluminum alloy, magnesium alloy and the like.
Background
The hydroforming technology is also called as internal high pressure forming technology, and depends on that fluid medium (such as water) generates huge pressure under the action of high pressure to serve as a male die (or a female die) of a die, so that a plate or a pipe fitting is attached to the female die (or the male die) of the die, a workpiece is subjected to plastic forming, and a component with a required shape is obtained. The hydraulic forming is adopted, the workpiece is formed under the action of hydrostatic pressure stress, the forming property is good, deep drawing bulging can be carried out, the stress of a component is the pressure stress, the rebound quantity is small, the forming size is accurate and stable, and the forming technology is an important forming technology for realizing the forming of complex workpieces.
However, the main body of the hydraulic forming equipment is a large-tonnage hydraulic press, the liquid bulging pressure is usually 150-. By combining the factors, the hydraulic forming press has the requirements of good rigidity, long stroke, large tonnage and very large investment, and is a main source of the hydraulic forming production cost of large-scale components.
The Chinese invention patent is disclosed, the publication number is: CN105537362B, patent name: a device and a method for reducing hydro-mechanical drawing force of a large-size plate member are disclosed in the application date: 20160226, relating to a forming device and a method of a thin-wall deep-cavity curved surface plate member, aiming at solving the problems of large tonnage and high energy consumption of equipment caused by large reaction force of a liquid medium during hydro-mechanical drawing of a large-size plate member. The device comprises a male die, a blank holder, a female die, a liquid chamber and a back pressing die, wherein the upper surface of the back pressing die is a concave curved surface, the curved surface shape is the same as that of the corresponding part of the male die above, and the side wall of the back pressing die can slide up and down along the side wall of a large through hole at the bottom of the liquid chamber. When the male die moves downwards to a certain depth, the lower surface of the plate blank is in contact with and completely attached to the upper surface of the back pressing die, the back pressing die simultaneously clamps the plate blank along with the male die and moves downwards, the plate blank at the attached position is not acted by high-pressure liquid, only the lower surface of the plate blank in the annular area outside the back pressing die is acted by the high-pressure liquid, and the acting area of the high-pressure liquid on the male die is reduced, so that the liquid-filled drawing force is reduced.
Disclosure of Invention
The invention provides a hydraulic forming process for a flexible cross beam type pull rod locking plate, which comprises the following process flows of:
s1: the equipment beam 1 is driven by a die assembly oil cylinder 6 and the like to rapidly move downwards to drive the upper die 2 to reach a preset closing point;
s2: under the coordination of the mold and the water injection system, a motor, a hydraulic or pneumatic driving device 8 and the like drive a locking screw 7 to rotate so as to realize the coordination of the locking screw 7 and a locking nut, and an upper mold 2 and a lower mold 3 are tensioned, so that the upper mold 2 overcomes the forming resistance of a workpiece to complete the forming, water injection and mold assembly;
s3: after the die is closed to the end, the pressurizing system works under the coordination of the action of the die, and the locking screw 7 serves as a pull rod to provide the locking force of the die so as to complete the hydraulic bulging of the workpiece;
s4: after the pressurization system releases the pressure, the die closing oil cylinder 6 and the like drive the equipment beam 1 and the upper die 2 to rapidly move upwards, the die is opened, the workpiece is taken away, and the hydraulic forming of the plate is completed.
Preferably, in the S2 step, after the water injection system is started, the air inside the hydraulic chamber 10 is exhausted, and the liquid is filled in the hydraulic chamber 10.
Preferably, in steps S2 and S3, the driving system controls the torque force of the locking screw 7 to apply 10-70% pre-load force to the mold.
Preferably, in step S3, the pressurizing system is activated, and the sheet material is hydraulically expanded under the action of the liquid pressure in the hydraulic chamber 10.
Preferably, in steps S2 and S3, the water injection and pressurization system 14 controls the state of the electromagnetic spill valve to switch between low-pressure water injection and high-pressure water injection.
Preferably, in the steps S1 and S4, the mold clamping cylinder 6 and the like drive the upper mold 2 to move, the moving speed of the mold opening and closing is 0-1200m/S, and the stroke is 400-1800 mm.
The invention has the beneficial effects that: the hydraulic forming die can realize the hydraulic forming of complex workpieces, particularly large plates, reduce the tonnage of the press required by the hydraulic forming, and realize the lightweight design of the die. Meanwhile, the investment cost of equipment and a die is lower, the production beat is faster, and the product quality is also ensured.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure, the position of the upper end of the main shaft,
1. a cross beam; 2. an upper die; 3. a lower die; 4. a work table; 5. a guide post; 6. a die closing oil cylinder; 7. locking the screw rod; 8. a drive device; 9. a lock nut; 10. a hydraulic chamber; 11. forming a plate; 12. an electronic control system; 13. a hydraulic system; 14. water injection, pressure boost system.
Detailed Description
The present invention is described in detail below, and the description in this section is merely exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
The invention provides a hydraulic forming process for a flexible cross beam type pull rod locking plate, which comprises the following process flows of:
s1: the equipment beam 1 is driven by a die assembly oil cylinder 6 and the like to rapidly move downwards to drive the upper die 2 to reach a preset closing point;
s2: under the matching of the upper die 2 and the water injection system, a motor, a hydraulic or pneumatic driving device 8 and the like drive a locking screw 7 to rotate to realize the matching of the locking screw 7 and a locking nut, and the upper die 2 and the lower die 3 are tensioned, so that the upper die 2 overcomes the forming resistance of a workpiece to complete forming, water injection and die assembly;
s3: after the die is closed to the end, the pressurizing system works under the coordination of the action of the die, and the locking screw 7 serves as a pull rod to provide the locking force of the die so as to complete the hydraulic bulging of the workpiece;
s4: after the pressurization system releases the pressure, the die closing oil cylinder 6 and the like drive the equipment beam 1 and the upper die 2 to rapidly move upwards, the die is opened, the workpiece is taken away, and the hydraulic forming of the plate is completed.
In this embodiment, it is preferable that after the water injection system is activated in step S2, air inside the hydraulic chamber 10 is exhausted, and the hydraulic chamber 10 is filled with liquid.
By adopting the process, the water injection process of the hydraulic chamber 10 is completed in the die assembly process, and the production takt is improved.
In the present embodiment, preferably, in steps S2 and S3, the driving system controls the torque force of the locking screw 7 to apply 10-70% of the pre-tightening force to the mold.
By adopting the process, the locking force of the mold applied by the locking screw 7 is controlled by the driving system, so that the accurate control of the locking force applied to each region of the mold can be realized, and the mold is prevented from deforming under the action of hydraulic bulging force.
Preferably, in this embodiment, the pressurization system is started, and the sheet material completes the hydraulic bulging under the action of the liquid pressure in the hydraulic chamber 10.
Preferably, in the present embodiment, in steps S2 and S3, the water injection and pressurization system 14 controls the state of the electromagnetic spill valve to switch between low-pressure water injection and high-pressure water injection.
By adopting the process, the switching between low-pressure water injection and high-pressure bulging is completed through the electromagnetic overflow valve, and the die structure is simpler.
In the preferred embodiment, in the steps S1 and S4, the mold clamping cylinder 6 and the like drive the upper mold 2 to move, the moving speed of the mold opening and closing is 0-1200m/S, and the stroke is 400-1800 mm.
By adopting the process, the opening and closing speed and the stroke of the die are far greater than those of the hydraulic station adopting the press to provide the locking force, the production efficiency is greatly improved, and the size range of the formed plate 11 is also improved.
It is to be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used merely for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, and thus should not be considered as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (6)
1. A hydraulic forming process for a flexible cross beam type pull rod locking plate is characterized by comprising the following process flows of:
s1: the equipment beam (1) is driven by a die assembly oil cylinder (6) and the like to rapidly move downwards to drive the upper die (2) to reach a preset closing point;
s2: under the matching of a mold and a water injection system, a motor, a hydraulic or pneumatic driving device (8) and the like drive a locking screw (7) to rotate to realize the matching of the locking screw (7) and a locking nut, and an upper mold (2) and a lower mold (3) are tensioned, so that the upper mold (2) overcomes the forming resistance of a workpiece to finish forming, water injection and mold closing;
s3: after the die is closed to the end, the pressurizing system works under the coordination of the action of the die, and the locking screw (7) serves as a pull rod to provide the locking force of the die so as to complete the hydraulic bulging of the workpiece;
s4: after the pressurization system releases the pressure, the die closing oil cylinder (6) and the like drive the equipment beam (1) and the upper die (2) to rapidly move upwards, the die is opened, the workpiece is taken away, and the hydraulic forming of the plate is completed.
2. The flexible beam (1) type tie-rod locking panel hydroforming process according to claim 1, wherein in the step S2, after the water injection system is activated, the air inside the hydraulic chamber (10) is exhausted and the hydraulic chamber (10) is filled with the liquid.
3. The hydroforming process of a flexible beam (1) type tension rod locking tube according to claim 1, characterized in that in the steps of S2 and S3, the torque force of the locking screw (7) is controlled by the driving system to apply 10-70% of the pre-tightening force to the die.
4. A hydroforming process of a flexible beam (1) type tie rod locking tube according to claim 1 characterized in that the pressurization system is activated and the sheet completes the hydroforming under the effect of the liquid pressure in the hydraulic chamber (10).
5. The flexible beam (1) type pull rod locking plate hydraulic forming process according to claim 1, wherein in the step S2, the water injection and pressurization system (14) realizes the switching of low-pressure water injection and high-pressure water injection by controlling the state of an electromagnetic overflow valve.
6. The hydraulic forming process for the flexible beam (1) type pull rod locking pipe fitting of claim 2, wherein in the steps S1 and S4, the mold closing cylinder (6) and the like drive the upper mold (2) to move, the moving speed of the mold opening and closing is 0-1200m/S, and the stroke is 400-1800 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032265.2A CN111434409A (en) | 2019-01-14 | 2019-01-14 | Hydraulic forming process for flexible cross beam type pull rod locking plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032265.2A CN111434409A (en) | 2019-01-14 | 2019-01-14 | Hydraulic forming process for flexible cross beam type pull rod locking plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111434409A true CN111434409A (en) | 2020-07-21 |
Family
ID=71580729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910032265.2A Withdrawn CN111434409A (en) | 2019-01-14 | 2019-01-14 | Hydraulic forming process for flexible cross beam type pull rod locking plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111434409A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372027A (en) * | 1989-11-29 | 1994-12-13 | Armco Steel Company, L.P. | Controlled material flow hydroforming |
| CN1559719A (en) * | 2004-03-02 | 2005-01-05 | 广东工业大学 | Metal plate material hydraulic shaping method and its mould device |
| CN101152656A (en) * | 2006-09-27 | 2008-04-02 | 中国航天科技集团公司第五研究院第五一○研究所 | Stephanoporate thin wall curve grid hydraulic forming mold and method |
| CN102500679A (en) * | 2011-12-23 | 2012-06-20 | 佛山市康思达液压机械有限公司 | Hydraulic press integrating rubber cushion forming and panel liquid-filling forming |
| CN106216478A (en) * | 2016-08-29 | 2016-12-14 | 天津市天锻压力机有限公司 | A kind of aluminium alloy car part liquid-filling shaping preparation method |
| CN106378375A (en) * | 2016-08-30 | 2017-02-08 | 兰州空间技术物理研究所 | Hydraulic forming device of molybdenum grid for iron thruster |
-
2019
- 2019-01-14 CN CN201910032265.2A patent/CN111434409A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372027A (en) * | 1989-11-29 | 1994-12-13 | Armco Steel Company, L.P. | Controlled material flow hydroforming |
| CN1559719A (en) * | 2004-03-02 | 2005-01-05 | 广东工业大学 | Metal plate material hydraulic shaping method and its mould device |
| CN101152656A (en) * | 2006-09-27 | 2008-04-02 | 中国航天科技集团公司第五研究院第五一○研究所 | Stephanoporate thin wall curve grid hydraulic forming mold and method |
| CN102500679A (en) * | 2011-12-23 | 2012-06-20 | 佛山市康思达液压机械有限公司 | Hydraulic press integrating rubber cushion forming and panel liquid-filling forming |
| CN106216478A (en) * | 2016-08-29 | 2016-12-14 | 天津市天锻压力机有限公司 | A kind of aluminium alloy car part liquid-filling shaping preparation method |
| CN106378375A (en) * | 2016-08-30 | 2017-02-08 | 兰州空间技术物理研究所 | Hydraulic forming device of molybdenum grid for iron thruster |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200721 |