CN111434413A - Hydraulic forming process for flexible cross beam type spiral locking plate - Google Patents
Hydraulic forming process for flexible cross beam type spiral locking plate Download PDFInfo
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- CN111434413A CN111434413A CN201910032304.9A CN201910032304A CN111434413A CN 111434413 A CN111434413 A CN 111434413A CN 201910032304 A CN201910032304 A CN 201910032304A CN 111434413 A CN111434413 A CN 111434413A
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- die
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- hydroforming
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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
-
- 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
-
- 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
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a hydraulic forming process of a flexible cross beam type spiral locking plate, which comprises the following process flows of: the upper die and the cross beam move downwards under the driving of a lifting hydraulic cylinder and the like, and the cross beam reaches a bottom dead center; the die assembly locking pin is driven by a cylinder, an oil cylinder or a motor to lock the upper dead point of the upward floating beam; the spiral locking device extends by taking the cross beam as a base under the matching of the upper die and the water injection system, contacts the bottom surface of the upper die, and applies force to drive the upper die to overcome the forming resistance of a workpiece, so as to form, inject water and close the die; after the die is closed to the bottom, the pressurizing system works under the coordination of the action of the die, and the equipment beam and the movable workbench provide the locking force of the die; after the pressurization system releases the pressure and the spiral locking device retreats, the die closing locking pin retreats from the working position; and the lifting hydraulic cylinder and the like drive the cross beam and the upper die to rapidly move upwards, the die is opened, the workpiece is taken away, and the hydraulic forming of the plate is completed. According to the invention, the spiral locking device provides the locking force of the plate hydraulic forming die, so that the lightweight of the hydraulic forming equipment and the die is realized, the cost is lower, the efficiency is higher, and the product quality is ensured.
Description
Technical Field
The invention mainly relates to the technical field of hydraulic forming, in particular to a hydraulic forming process of a flexible cross beam type spiral 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 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 an upper die, so that the plate or the plate is attached to the female die (or the male die), and a workpiece is subjected to plastic forming to obtain a component with a required shape. 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 range is 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.
Published CN201410117624.1, patent name: the bidirectional pressurizing and liquid-filling forming method of the large-scale thin-wall complex-characteristic plate is applied for the day: 20140327. a bidirectional pressurizing and liquid-filling forming method for large-sized thin-wall plates with complex characteristics. The method comprises the steps of coating lubricating oil on one surface of a thin-wall plate material for lubricating treatment; pre-bulging the lubricated plate in a pre-forming die to form the approximate shape of a part; then, performing reverse shaping on the preformed sheet material in a shaping die to form a small fillet characteristic; and cutting off the process supplementary surface of the part to manufacture the final part. The bidirectional pressurizing and liquid-filling forming method for the large-sized thin-wall complex-characteristic plate provided by the invention can fully exert the plasticity of the material, effectively control the wall thickness reduction rate of parts, and can form plate parts with any complex shallow characteristics. Compared with the traditional explosive forming method for the parts, the method has the advantages of high efficiency, low cost, safe and convenient operation, high precision of the formed parts, no need of manual repair and the like.
On the basis, the invention provides the mold locking force required by the hydraulic forming of the plate through the spiral locking device, reduces the requirements on the rigidity of the press and the mold, realizes light weight of the press and the mold, and has lower equipment investment cost and better plate formability.
Disclosure of Invention
The invention provides a hydraulic forming process for a flexible beam type spiral locking plate, which is matched with equipment and a die of a hydraulic forming workstation for the flexible beam type spiral locking plate, and the workstation comprises: the device comprises a foundation base 5, upright posts 7, a pull rod 8, a cross beam 1, a spiral locking device 3, a movable workbench 6, a mold closing locking pin 2, a lifting hydraulic cylinder 4, a mold clamping device 10, an upper mold 11, a lower mold 13 and a hydraulic chamber 17, wherein the foundation base 5 is provided with the four upright posts 7, the adjacent upright posts 7 are connected through the pull rod 8, and the side surfaces of the upright posts 7 are provided with guide rails 9; a lifting hydraulic cylinder 4 is arranged at the bottom of the cross beam 1, and under the action of the lifting hydraulic cylinder 4, the cross beam 1 moves up and down along a guide rail 9 through a sliding block; the upper die 11 is connected with the cross beam 1 through a die clamper 10, and the lower die 13 is directly arranged on the movable workbench.
In the hydraulic station, the spiral locking devices 3 are installed at the bottom of the cross beam 1, the spiral locking devices 3 are uniformly distributed in an array shape and can be driven to rotate by a motor, a pneumatic device or a hydraulic device, the cross beam 1 is used as a base to extend between a die and the cross beam 1, and acting force required by plate forming and hydraulic bulging is provided.
The method comprises the following process steps:
s1: the upper die 11 and the cross beam 1 are driven by the lifting hydraulic cylinder 4 and the like to rapidly move downwards, and the cross beam 1 reaches a bottom dead center;
s2: the die assembly locking pin 2 is driven by a cylinder, an oil cylinder or a motor to lock the upper dead point of the upward floating of the beam 1;
s3: the spiral locking device 3 rotates and extends by taking the cross beam 1 as a base under the matching of a mold and a water injection system, contacts the bottom surface of the upper mold 11, and applies force to drive the upper mold 11 to overcome the forming resistance of a workpiece to complete forming, water injection and mold assembly;
s4: after the die is closed to the end, the pressurizing system works under the coordination of the action of the die, and the upper cross beam 1 of the equipment and the movable workbench provide the locking force of the die to jointly complete the hydraulic bulging of the workpiece;
s5: after the pressurization system releases the pressure and the spiral locking device 3 is rotated and withdrawn, the die closing locking pin 2 is withdrawn from the working position;
s6: lifting hydraulic cylinder 4, cylinder or motor etc. drive equipment crossbeam 1 and last mould 11 rapid upward movement, open and go up mould 11 and take away the work piece, accomplish the hydroforming of plate.
Preferably, in step S1, in the mold opening state, the distance between the beam and the bottom surface of the upper mold 11 is in the range of 0-150mm, which is the stroke required for workpiece forming and mold pre-locking, and the stroke is realized by the mold clamper 10.
Preferably, in step S2, the beam 1 is restrained from moving any more by the clamp locking pin 2 when moving upward more than 1-150 mm.
Preferably, in step S3, the screw locking device 3 has a working stroke of 0-150mm, which is greater than the upward movement distance of the beam 1, and can provide a force of 800-.
Preferably, in step S3, after the water injection system is started, the air inside the hydraulic chamber 17 is exhausted along with the mold clamping process.
Preferably, in step S4, the pressurization system is activated, and the plate completes the hydraulic bulging by the liquid pressure in the hydraulic chamber 17.
Preferably, in step S4, the beam 1 has a lower deflection of 1/1000 to 1/8000 when fully loaded.
Preferably, in step S4, the screw locking devices 3 are horizontally arranged in several rows, and the load formed by the screw locking devices 3 is uniformly distributed on the whole table top of the beam 1.
Preferably, in the steps of S1 and S6, the opening and closing speed of the equipment beam 1 and the mould is 0-1200m/S, and the stroke is 400-1800 mm.
The invention has the beneficial effects that: the hydraulic forming method can realize the hydraulic forming of complex workpieces, particularly large plates, reduce the tonnage of a press and a die required by the hydraulic forming, realize the lightweight design of hydraulic station equipment and the die, and lower investment cost of the equipment and the die. Meanwhile, the production beat is faster, and the product quality is also ensured.
Drawings
FIG. 1 is a schematic view of a hydroforming station according to the present invention;
FIG. 2 is a schematic view of a hydroforming die according to the present invention;
in the figure, 1, a cross beam; 2. a mold closing locking pin; 3. a screw locking device; 4. a lifting hydraulic cylinder; 5. foundation; 6. moving the working table; 7. a column; 8. a pull rod; 9. a guide rail;
10. a mold clamping device; 11. an upper die 11.1, an upper die seat 11.2 and an upper die insert; 13. a lower die 13.1, a lower die base 13.2 and a lower die insert; 17. a hydraulic chamber; 18. and forming the plate.
Detailed Description
The invention provides a hydraulic forming process for a flexible beam type spiral locking plate, which is matched with a hydraulic forming workstation for the flexible beam type spiral locking plate, comprises forming equipment and a mould shown in figure 2, and comprises the following steps: the device comprises a foundation base 5, stand columns 7, a pull rod 8, a cross beam 1, a spiral locking device 3, a movable workbench 6, a mold closing locking pin 2, a lifting hydraulic cylinder 4, a mold clamping device 10, an upper mold 11, a lower mold 13 and a hydraulic chamber 17, wherein the upper mold 11 consists of an upper mold base 11.1 and an upper mold insert 11.2, the lower mold 13 consists of a lower mold base 13.1 and a lower mold insert 13.2, the foundation base 5 is provided with the four stand columns 7, the adjacent stand columns 7 are connected through the pull rod 8, and the side surfaces of the stand columns 7 are provided with guide rails 9; a spiral locking device 3 is arranged on the bottom surface of the cross beam 1, a lifting hydraulic cylinder 4 is arranged at the bottom of the cross beam 1, and the cross beam 1 moves up and down along a guide rail 9 through a sliding block under the action of the lifting hydraulic cylinder 4; the upper die 11 is connected with the cross beam 1 through a die clamper 10, and the lower die 13 is directly arranged on the movable workbench 6.
In the hydraulic station, the spiral locking devices 3 are uniformly distributed in an array shape and can be driven by a motor, a pneumatic device or a hydraulic device to rotate, the cross beam 1 is used as a base to extend between a die and the cross beam 1, and acting force required by plate forming and hydraulic bulging is provided.
The method comprises the following process flows:
s1: the upper die 11 and the equipment beam 1 are driven by the lifting hydraulic cylinder to rapidly move downwards, and the beam 1 reaches a bottom dead center;
s2: the die assembly locking pin 2 is driven by a cylinder, an oil cylinder or a motor to lock the upper dead point of the upward floating of the beam 1;
s3: the spiral locking device 3 is matched with a water injection system, rotates and extends by taking the cross beam 1 as a base, contacts with the bottom surface of the upper die 11, and applies force to drive the upper die 11 to overcome the forming resistance of a workpiece, so that forming, water injection and die assembly are completed;
s4: after the die is closed to the end, the pressurizing system works under the coordination of the action of the die, and the upper cross beam 1 and the movable workbench 6 of the equipment provide die locking force to jointly complete the hydraulic bulging of the workpiece;
s5: after the pressurization system releases the pressure and the spiral locking device 3 is rotated and withdrawn, the die closing locking pin 2 is withdrawn from the working position;
s6: and the lifting hydraulic cylinder 4, the cylinder or the motor drives the equipment beam 1 and the upper die 11 to rapidly move upwards, and the upper die 11 is opened to take out the workpiece, so that the hydraulic forming of the plate is completed.
In the present embodiment, it is preferable that in step S1, the beam 1 has a gap of 0 to 150mm from the bottom surface of the upper mold 11 when the mold is closed, depending on the gap between the beam 1 and the upper mold 11 which is set in advance.
By adopting the process, the upper die 11 is connected with the equipment beam 1 by means of the die clamper 10, so that the die assembly locking pin 2 can smoothly reach the upper dead point of the upward floating of the beam 1 without interference; meanwhile, in step S3, the preliminary plastic forming of the plate with a certain shape may be completed by using the rotational ejection function of the screw locking device 3.
In this embodiment, it is preferable that the beam 1 can move upward in the range of 1 to 150mm in the step of S2.
By the aid of the process, pre-forming of the workpiece and die assembly of the die are completed under the rotating ejection effect of the spiral locking device 3 until the cross beam 1 is attached to the die assembly locking pin 2, and accordingly required hydraulic bulging locking force is provided for hydraulic forming of the plate in the later period.
In the present embodiment, preferably, in step S3, the working stroke of the screw locking device 3 is 0-150mm, and is greater than the upward moving distance of the beam 1, and the force can be provided by 800-.
By the aid of the process, the working stroke of the spiral locking device 3 is larger than the distance that the mold locking cross beam 1 can move upwards, the spiral locking device 3 takes the cross beam 1 as a base, pressure is effectively applied to the bottom surface of the upper mold 11, and certain mold locking pretightening force can be provided based on needs.
In this embodiment, it is preferable that the air inside the hydraulic chamber 17 is exhausted after the water injection system is activated in step S3, and the hydraulic chamber 17 is filled with the liquid.
By adopting the process, the processes of exhausting and injecting water into the hydraulic chamber 17 are completed in the process of die assembly, and the production takt is greatly improved.
In the present embodiment, preferably, in step S4, the pressurization system is activated, and the plate completes the hydraulic bulging by the liquid pressure in the hydraulic chamber 17.
In the present embodiment, it is preferable that the lower deflection of the cross beam 1 when fully loaded is 1/1000-1/8000 by the screw locking device 3 in S4.
By adopting the process, the deformation of the cross beam 1 is ensured to be within the elastic deformation range under the action of the spiral locking device 3, so that the service life of the hydraulic station equipment is prolonged; compared with a common press type mold locking mode, the mold locking device has lower rigidity requirement on hydraulic station equipment and molds, and is favorable for realizing lightweight design of the hydraulic station.
In the present embodiment, preferably, in step S4, the screw locking devices 3 are horizontally arranged in several rows, and the load formed by the screw locking devices 3 is uniformly distributed on the entire table top of the beam 1.
By the aid of the process, the locking force can be uniformly applied to the die by the spiral locking device 3, the locking force applied to the die cannot be influenced even if the cross beam 1 deforms in the elastic deformation range, and the size accuracy in the plate forming process is guaranteed.
In the present embodiment, preferably, in the steps S1 and S6, the lifting hydraulic cylinder, the air cylinder, the motor or the like drives the upper mold 11 to move, the moving speed of opening and closing the upper mold 11 is 0-1200m/S, and the stroke is 400-1800 mm.
By adopting the process, because the lifting hydraulic cylinder and the like do not provide the locking force of the die, the opening and closing speed of the die can reach 0-1200m/s, and the stroke is 400-1800mm, the production takt is greatly improved, and the application range of the hydraulic station is expanded.
The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.
Claims (9)
1. The utility model provides a flexible crossbeam formula spiral locking plate hydroforming technology which characterized in that: the method comprises the following process steps: s1: the upper die (11) and the cross beam (1) are driven by a lifting hydraulic cylinder (4) and the like to rapidly move downwards, and the cross beam (1) reaches a bottom dead center; s2: the die assembly locking pin (2) is driven by a cylinder, an oil cylinder or a motor to lock the upper dead point of the upward floating of the beam (1); s3: the spiral locking device (3) rotates and extends by taking the cross beam (1) as a base under the matching of the mold and the water injection system, contacts the bottom surface of the upper mold (11), applies force to drive the upper mold (11) to overcome the forming resistance of a workpiece, and forms, injects water and closes the mold; s4: after the die is closed to the bottom, the pressurizing system works under the coordination of the action of the die, and the equipment beam (1) and the movable workbench (6) provide the locking force of the die to jointly complete the hydraulic bulging of the workpiece; s5: after the pressurization system finishes pressure relief, the hydraulic station spiral locking device (3) rotates back, and the die assembly locking pin (2) retreats from the working position; s6: lifting hydraulic cylinders (4), cylinders or motors and the like drive the equipment beam (1) and the upper die (11) to move upwards quickly, the die is opened, workpieces are taken away, and hydraulic forming of the plate is completed.
2. A process of hydroforming a flexible beam screw lock plate according to claim 1, wherein: in step S1, the stroke range required for workpiece forming and mold prelock is set to 0-150mm, and the clearance is achieved by the die clamper (10).
3. A process of hydroforming a flexible beam screw lock plate according to claim 1, wherein: in step S2, the cross member (1) reaches the top dead center where the apparatus cross member (1) floats upward when moving upward more than 1-150mm, and is restrained from moving by the clamp locking pin (2).
4. A process of hydroforming a flexible beam screw lock plate according to claim 3, wherein: in step S3, the working stroke of the screw locking device (3) is 0-150mm and is greater than the upward moving distance of the beam (1), and the force provided by the screw locking device can be 800-.
5. A process of hydroforming a flexible beam screw lock plate according to claim 1, wherein: in step S3, after the water injection system is started, air inside the hydraulic chamber (17) is exhausted along with the mold closing process.
6. A process of hydroforming a flexible beam screw lock plate according to claim 1, wherein: in step S4, the pressurizing system is activated, and the plate completes the hydraulic bulging by the liquid pressure in the hydraulic chamber (17).
7. A process of hydroforming a flexible beam screw lock plate according to claim 1, wherein: in the step S4, the lower deflection of the cross beam (1) when fully loaded is 1/1000-1/8000.
8. A process of hydroforming a flexible beam screw lock plate according to claim 7, wherein: in the step S4, the screw locking devices (3) are horizontally arranged in a plurality of rows, and the load formed by the screw locking devices (3) is uniformly distributed on the table top of the whole beam (1).
9. A process of hydroforming a flexible beam screw lock plate according to claim 1, wherein: in the steps S1 and S6, the moving speed of the opening and closing of the upper mold (11) is 0-1200m/S, and the stroke is 400-1800 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032304.9A CN111434413A (en) | 2019-01-14 | 2019-01-14 | Hydraulic forming process for flexible cross beam type spiral locking plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032304.9A CN111434413A (en) | 2019-01-14 | 2019-01-14 | Hydraulic forming process for flexible cross beam type spiral locking plate |
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| Publication Number | Publication Date |
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| CN111434413A true CN111434413A (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910032304.9A Withdrawn CN111434413A (en) | 2019-01-14 | 2019-01-14 | Hydraulic forming process for flexible cross beam type spiral locking plate |
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| CN (1) | CN111434413A (en) |
Citations (5)
| 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 |
| 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 CN201910032304.9A patent/CN111434413A/en not_active Withdrawn
Patent Citations (5)
| 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 |
| 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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Application publication date: 20200721 |