CN117358817B - Plastic forming device and plastic forming method for metal corrugated pipe - Google Patents
Plastic forming device and plastic forming method for metal corrugated pipe Download PDFInfo
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- CN117358817B CN117358817B CN202311671655.7A CN202311671655A CN117358817B CN 117358817 B CN117358817 B CN 117358817B CN 202311671655 A CN202311671655 A CN 202311671655A CN 117358817 B CN117358817 B CN 117358817B
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- 239000004033 plastic Substances 0.000 title claims abstract description 43
- 239000002184 metal Substances 0.000 title claims abstract description 41
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 125
- 238000004891 communication Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 239000007769 metal material Substances 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 2
- 238000009931 pascalization Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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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
- B21D26/033—Deforming tubular 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
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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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 relates to the technical field of metal corrugated pipe manufacturing, and particularly provides a metal corrugated pipe plastic forming device and a metal corrugated pipe plastic forming method.
Description
Technical Field
The invention relates to the technical field of metal bellows manufacturing, in particular to a metal bellows plastic forming device and a metal bellows plastic forming method.
Background
At present, the forming mode of the metal corrugated pipe (particularly the precise metal corrugated pipe for aerospace) mainly adopts internal high-pressure forming, and pure water or high-purity inert gas is adopted as a forming medium. With the development and progress of technology, materials such as titanium alloy and superalloy are widely applied to the manufacture of precise metal corrugated pipes. However, these materials tend to have poor plasticity, and the tube blank is broken due to insufficient plasticity in the internal high-pressure forming process, so that the production efficiency and the yield are low, and the use requirements cannot be met.
Disclosure of Invention
Technical scheme (one)
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
in a first aspect, an embodiment of the present invention provides a metal bellows plastic forming apparatus.
The embodiment of the invention provides a plastic forming device for a metal corrugated pipe, which comprises the following components:
the box body is internally provided with a closed forming cavity;
the guide assembly is arranged in the forming cavity and used for bearing the guide tube blank;
The first sealing component is arranged at one end of the tube blank;
The second sealing assembly is arranged at the other end of the tube blank, and a closed space is formed inside the tube blank through the first sealing assembly and the second sealing assembly;
The pressure piece penetrates through the box body in a sliding mode, and one end of the pressure piece is in contact with the first sealing assembly;
the first pressurizing port is communicated with the forming cavity and is used for controlling the pressure in the forming cavity;
the second pressurizing port penetrates through the box body and the second sealing assembly, and is communicated with the inside of the tube blank and used for controlling the pressure inside the tube blank.
Optionally, the guide assembly comprises:
At least three guide post, at least three guide post annular equidistance set up in the shaping chamber, and the guide post rotates the bottom of installing in the box.
Optionally, the guide assembly further comprises:
The at least two grooves are equidistantly arranged on the outer surface of the guide post along the height direction of the guide post;
The cushion blocks are arranged in the grooves, and a bearing space for bearing the mold pieces is formed between the adjacent cushion blocks.
Optionally, the guide assembly further comprises:
arc positioning bolt, arc positioning bolt screw thread run through the lateral wall of box, and arc positioning bolt is located the one end and the guide post contact of forming chamber.
Optionally, the first seal assembly comprises:
a first sealing plate;
The first sealing bulge is fixedly arranged on one side end face of the first sealing plate, and is inserted into one end of the tube blank.
Optionally, the first seal assembly further comprises:
the first sealing ring is arranged between the first sealing bulge and the tube blank and is used for sealing one end of the tube blank.
Optionally, the second seal assembly comprises:
a second sealing plate;
The second sealing bulge is fixedly arranged on one side end face of the second sealing plate, and the second sealing bulge is inserted into the other end of the tube blank.
Optionally, the second seal assembly further comprises:
the second sealing ring is arranged between the second sealing bulge and the tube blank and is used for sealing the other end of the tube blank.
Optionally, the number of the arc-shaped positioning bolts is at least two, and the at least two arc-shaped positioning bolts are equidistantly arranged on the side wall of the box body along the height direction of the guide post.
In a second aspect, embodiments of the present invention provide a method for plastic forming of a metal bellows.
The embodiment of the invention provides a plastic forming method of a metal corrugated pipe, which is used for controlling the plastic forming device of the metal corrugated pipe according to any one of the technical schemes, and comprises the following steps:
s100: installing the guide assembly in the forming cavity according to preset parameters;
s200: installing the tube blank in the guide assembly, and sealing the tube blank through the first sealing assembly and the second sealing assembly;
s300: pressurizing the sealed tube blank to enable the tube blank to form a first forming state;
S400: pressurizing the forming cavity under the condition that the tube blank is in the first forming state, so that the tube blank is in the second forming state;
S500: and under the condition that the tube blank is in the second forming state, the first sealing assembly and the second sealing assembly are moved to the directions approaching to each other through the pressure piece, so that the tube blank is in the third forming state, wherein under the condition that the tube blank is in the third forming state, the internal pressure of the tube blank is controlled to be higher than the external pressure, and the duration time is controlled to be greater than or equal to 5min, so that the metal bellows is generated.
(II) advantageous effects
The beneficial effects of the invention are as follows: the plastic forming device for the metal corrugated pipe comprises a box body, a guide assembly, a first sealing assembly, a second sealing assembly, a pressure piece, a first pressurizing port and a second pressurizing port, wherein the guide assembly is arranged in a forming cavity, the guide assembly is arranged at the bottom of the box body, a pipe blank is vertically borne in the middle of the guide assembly, one end of the pipe blank, which is positioned at the bottom of the pipe blank, is provided with the second sealing assembly, one end of the pipe blank is sealed through the second sealing assembly, and meanwhile, the second sealing assembly is contacted with the bottom of the forming cavity under the action of gravity; a first sealing component is arranged at one end of the top of the tube blank, the other end of the tube blank is sealed through the first sealing component, and the tube blank in the guide component can be sealed through the first sealing component and the second sealing component, so that a sealed space is formed inside the tube blank; simultaneously, the pressure in the forming cavity and the pressure in the tube blank are respectively controlled through the first pressurizing port and the second pressurizing port, the control of the pressure in the tube blank and the pressure outside the tube blank is realized, the back pressure is applied to the outer surface of the tube blank, the back pressure is applied to the tube blank in the forming process, the three-way hydrostatic pressure is formed, the strong inhibition effect of the high hydrostatic pressure on crack initiation and expansion in the metal plastic deformation process is realized, the plastic deformation capacity of the metal material is effectively improved, the single-pass forming process of the large wave depth ratio corrugated tube of the low-plastic metal materials such as martensitic stainless steel, titanium alloy and the like is realized, the rebound is controlled, and the forming precision is improved; meanwhile, the internal pressure and the external pressure of the pipe blank are regulated to form internal and external pressure differences, the internal and external pressure differences are used as driving force for plastic forming, the internal and external pressure is regulated according to different mechanical properties of materials, and the strength of a static water pressure field is controlled, so that proper metal plastic deformation capacity is obtained.
Drawings
FIG. 1 is a schematic diagram showing a front view of a plastic forming apparatus for metal bellows according to the present invention;
FIG. 2 is a schematic diagram showing a schematic cross-sectional front view of a plastic forming apparatus for a metal bellows according to the present invention;
fig. 3 is a schematic flow chart of a plastic forming method of a metal corrugated pipe.
[ Reference numerals description ]
100-Box, 200-guide assembly, 300-first sealing assembly, 400-second sealing assembly, 500-pressure piece, 600-first pressurizing port, 700-second pressurizing port;
210-guide posts, 220-grooves, 230-cushion blocks and 240-arc-shaped positioning bolts;
310-a first sealing plate, 320-a first sealing protrusion, 330-a first sealing ring;
410-a second sealing plate, 420-a second sealing protrusion, 430-a second sealing ring;
101-forming chamber, 201-load space.
Description of the embodiments
In order that the above-described aspects may be better understood, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the specification, the figure 2 comprises two working states before forming and after forming, wherein the part A is the working state of a metal corrugated pipe plastic forming device before forming, and the part B is the working state of a metal corrugated pipe plastic forming device after forming;
as shown in fig. 1 and 2, a first aspect of an embodiment of the present application proposes a metal bellows plastic forming apparatus including: a case 100 in which a closed molding cavity 101 is formed in the case 100; a guide assembly 200, wherein the guide assembly 200 is arranged in the forming cavity 101 and is used for bearing a guide tube blank; a first seal assembly 300, wherein the first seal assembly 300 is arranged at one end of the pipe blank; a second seal assembly 400, the second seal assembly 400 being provided at the other end of the pipe blank, wherein a closed space is formed inside the pipe blank by the first seal assembly 300 and the second seal assembly 400; a pressure member 500, wherein the pressure member 500 is slidably inserted through the case 100, and one end of the pressure member 500 is in contact with the first sealing assembly 300; a first pressurizing port 600, wherein the first pressurizing port 600 communicates with the forming chamber 101 and is used for controlling the pressure in the forming chamber 101; and a second pressurizing port 700, wherein the second pressurizing port 700 penetrates through the case 100 and the second sealing assembly 400, and the second pressurizing port 700 communicates with the inside of the tube blank to control the pressure inside the tube blank.
The plastic forming device for the metal corrugated pipe provided by the embodiment of the application comprises a box body 100, a guide assembly 200, a first sealing assembly 300, a second sealing assembly 400, a pressure piece 500, a first pressurizing port 600 and a second pressurizing port 700, wherein a sealed forming cavity 101 is formed in the box body 100 and is used for bearing the guide assembly 200, the first sealing assembly 300 and the second sealing assembly 400, the guide assembly 200 is arranged in the forming cavity 101, a space for bearing a guide pipe blank is formed in the guide assembly 200, when the plastic forming device is used, the guide pipe blank is borne by the guide assembly 200, the first sealing assembly 300 and the second sealing assembly 400 are respectively arranged at two ends of the pipe blank, and the pipe blank is sealed by the first sealing assembly 300 and the second sealing assembly 400, so that a sealed space can be formed in the pipe blank; the pressure member 500 is slidably inserted through the side wall of the case 100, one end of the pressure member 500 located in the case 100 is in contact with the first seal member 300, the first pressurizing port 600 is communicated with the forming chamber 101, the second pressurizing port 700 is communicated with the inside of the closed tube blank, the pressure in the forming chamber 101 is controlled by the first pressurizing port 600, and the pressure in the inside of the closed tube blank is controlled by the second pressurizing port 700.
As can be seen from the above, by way of example, the guide assembly 200 is installed in the forming chamber 101, and the guide assembly 200 is installed at the bottom of the box 100, the middle of the guide assembly 200 vertically supports the pipe blank, one end of the pipe blank at the bottom is installed with the second sealing assembly 400, one end of the pipe blank is sealed by the second sealing assembly 400, and at the same time, the second sealing assembly 400 contacts with the bottom of the forming chamber 101 under the action of gravity; a first sealing assembly 300 is arranged at one end of the top of the tube blank, the other end of the tube blank is sealed through the first sealing assembly 300, and at the moment, the tube blank in the guide assembly 200 can be sealed through the first sealing assembly 300 and the second sealing assembly 400, so that a sealed space is formed inside the tube blank; the top of the tube blank forming the seal is provided with the pressure piece 500, one end of the pressure piece 500 is in contact with the first seal assembly 300, meanwhile, the pressure piece 500 moves vertically up and down, when the pressure piece 500 moves downwards, the second seal assembly 400 is in contact with the bottom of the forming cavity 101, which is equivalent to the fact that the first seal assembly 300 is fixed, the first seal assembly 300 can move downwards under the action of the pressure piece 500, so that the distance between the first seal assembly 300 and the second seal assembly 400 is reduced, the tube blank in the guide assembly 200 can be compressed, meanwhile, the pressure in the forming cavity 101 and the pressure in the tube blank are respectively controlled through the first pressurizing port 600 and the second pressurizing port 700, the internal pressure of the tube blank and the external pressure of the tube blank are controlled, the back pressure is applied to the outer surface of the tube blank in the forming process, the three-way hydrostatic pressure is applied to the tube blank, the plastic deformation capacity of the metal material is effectively improved through the strong inhibition effect of crack initiation and expansion in the high hydrostatic pressure on the plastic deformation process of the metal material, the large wave depth ratio tube blank single-time control forming precision of the low plastic metal material such as martensitic stainless steel, titanium alloy is improved, and the rebound forming precision is improved; meanwhile, the internal pressure and the external pressure of the pipe blank are regulated to form internal and external pressure differences, the internal and external pressure differences are used as driving force for plastic forming, the internal and external pressure is regulated according to different mechanical properties of materials, and the strength of a static water pressure field is controlled, so that proper metal plastic deformation capacity is obtained.
For example, the case 100 may be, but is not limited to, a split case 100, which is a two-sided symmetrical split, and when loaded together, the forming cavity 101 inside the case 100 is closed.
Illustratively, the press 500 may be, but is not limited to, a press.
As shown in fig. 1 and 2, in some examples, the guide assembly 200 includes: at least three guide posts 210, at least three guide posts 210 are disposed in the forming cavity 101 at equal intervals in a ring shape, and the guide posts 210 are rotatably mounted at the bottom of the case 100.
In this technical solution, the guiding assembly 200 includes three guiding columns 210 at least annularly equidistant arranged at the bottom inside the box 100, and a tube blank to be processed for bearing and guiding is formed between the guiding columns 210 annularly arranged, where the guiding assembly 200 includes at least three stably bearing guiding tube blanks, so that the tube blank is stable when being processed and compressed.
As shown in fig. 2, in some examples, the guide assembly 200 further includes: at least two grooves 220, at least two of the grooves 220 are equidistantly disposed on the outer surface of the guide post 210 along the height direction of the guide post 210; the cushion blocks 230 are disposed in the grooves 220, and a supporting space 201 for supporting the die is formed between adjacent cushion blocks 230.
In this embodiment, the guide assembly 200 further includes grooves 220 equidistantly disposed along the height of the guide posts 210, pads 230 are disposed in the grooves 220, and a supporting space 201 formed between adjacent pads 230 is used for supporting the die.
As shown in fig. 1-2, in some examples, the guide assembly 200 further includes: and an arc-shaped positioning bolt 240, wherein the arc-shaped positioning bolt 240 is threaded through the sidewall of the case 100, and one end of the arc-shaped positioning bolt 240 positioned in the forming chamber 101 is in contact with the guide post 210.
In this embodiment, the guide assembly 200 further includes an arc-shaped positioning bolt 240 threaded through the sidewall of the case 100, and one end of the arc-shaped positioning bolt 240 located in the forming cavity 101 contacts the guide post 210, and in use, the guide post 210 can be supported by the arc-shaped positioning bolt 240.
Illustratively, the arc-shaped positioning bolt 240 includes an arc-shaped supporting member and a rotation bolt, wherein the rotation bolt is rotationally connected with the arc-shaped supporting member, and when in use, the rotation bolt threads penetrate through the side wall of the box body 100, the arc-shaped supporting member is rotationally installed at one end of the rotation bolt located in the forming cavity 101, and the arc-shaped supporting member contacts with the outer surface of the guide post 210, and through the mutual matching of the arc-shaped supporting member and the rotation bolt, a transverse supporting force is provided for the guide post 210, so that the tube blank in the guide assembly 200 is ensured to work stably when being compressed during processing.
As shown in fig. 2, in some examples, the first seal assembly 300 includes: a first sealing plate 310; the first sealing protrusion 320, the first sealing protrusion 320 is fixedly installed at one end surface of the first sealing plate 310, and the first sealing protrusion 320 is inserted into one end of the tube blank.
In this technical solution, the first sealing assembly 300 includes a first sealing plate 310 and a first sealing protrusion 320, where the first sealing protrusion 320 is fixedly mounted on one side end surface of the first sealing plate 310, and meanwhile, the first sealing protrusion 320 is matched with a port of the tube blank, and the first sealing protrusion 320 is inserted into the port of the tube blank and used for plugging one end port of the tube blank.
Illustratively, the first sealing protrusion 320 has the same shape as the port of the tube blank to block the port of the tube blank as much as possible.
As shown in fig. 2, in some examples, the first seal assembly 300 further includes: and a first seal ring 330, wherein the first seal ring 330 is disposed between the first seal protrusion 320 and the tube blank, and is used for sealing one end of the tube blank.
In this technical scheme, the first sealing assembly 300 further includes a first sealing ring 330, where the first sealing ring 330 is disposed between the first sealing protrusion 320 and the pipe blank, and one end of the pipe blank can be tightly plugged by the first sealing ring 330, so as to ensure tightness thereof.
Illustratively, the first seal 330 may be, but is not limited to, a rubber seal.
As shown in fig. 2, in some examples, the second seal assembly 400 includes: a second sealing plate 410; and a second sealing protrusion 420, wherein the second sealing protrusion 420 is fixedly installed at one end surface of the second sealing plate 410, and the second sealing protrusion 420 is inserted into the other end of the tube blank.
In this embodiment, the second sealing assembly 400 includes a second sealing plate 410 and a second sealing protrusion 420, where the second sealing protrusion 420 is fixedly installed on one side end surface of the second sealing plate 410, and meanwhile, the second sealing protrusion 420 is matched with the other side port of the tube blank, and the second sealing protrusion 420 is inserted into the other side port of the tube blank for plugging the other side port of the tube blank.
Illustratively, the second sealing projection 420 is the same shape as the port of the tube blank to block the other side port of the tube blank as much as possible.
As shown in fig. 2, in some examples, the second seal assembly 400 further includes: and a second seal ring 430, wherein the second seal ring 430 is disposed between the second seal protrusion 420 and the tube blank, and is used for sealing the other end of the tube blank.
In this technical scheme, the second sealing assembly 400 further includes a second sealing ring 430, where the second sealing ring 430 is disposed between the second sealing protrusion 420 and the pipe blank, and the second sealing ring 430 can ensure tight sealing of the other end of the pipe blank, so as to ensure tightness of the pipe blank.
Illustratively, the second seal 430 may be, but is not limited to, a rubber seal.
As shown in fig. 2, in some examples, at least two arc-shaped positioning bolts 240 are provided, and at least two arc-shaped positioning bolts 240 are equidistantly disposed on the side wall of the case 100 along the height direction of the guide post 210, so as to ensure the stability of supporting the guide post 210.
As shown in fig. 3, a second aspect of the embodiment of the present application provides a plastic forming method for a metal bellows, for controlling a plastic forming apparatus for a metal bellows according to any one of the above-mentioned aspects, the method comprising:
S100: installing the guide assembly 200 in the forming cavity 101 according to preset parameters;
Before step S100, the design is selected, parameters such as material, die size, spacing distance, forming pressure, back pressure, etc. are determined according to specific product requirements, then the spacing between the guide posts 210 is adjusted, the guide posts 210 are twisted to rotate, the grooves 220 and the spacers 230 are oriented towards the tube blank, and the height of the spacers 230 and the spacing between the spacers 230 are adjusted by referring to the dimensions of the guide posts 210.
S200: installing the tube blank in the guide assembly 200, and sealing the tube blank by the first sealing assembly 300 and the second sealing assembly 400;
In the step S200, the tube blank is installed in the area between the guide posts 210, the lower end of the tube blank is sealed by the second sealing assembly 400 and is fixed at the bottom of the forming cavity 101, and meanwhile, the ventilation between the second pressurizing port 700 and the tube blank is ensured to be smooth; the dies are sequentially arranged on the corresponding cushion blocks 230, so that the dies are sleeved on the tube blank and keep a certain gap, and the dies can freely move up and down between the guide posts 210; the first seal assembly 300 is connected to the upper end of the tube blank, sealed, and the tightness of the tube blank and the entire box body 100 is inspected.
S300: pressurizing the sealed tube blank to form the tube blank into a first forming state;
in step S300, the second pressurizing port 700 is opened, high purity argon gas is introduced into the tube blank, the pressure is referred to the calculation result of selection, when the tube blank is expanded to the required size, the tube blank is in the first forming state, then pressure is released, and the guide post 210 is simultaneously twisted clockwise to rotate, so that the cushion block 230 is separated from the die.
S400: when the pipe blank is in the first forming state, the pressure is increased in the forming chamber 101 to form the pipe blank into the second forming state;
In step S400, when the tube blank is in the first forming state, the second pressurizing port 700 and the first pressurizing port 600 are opened, high purity argon is introduced into the tube blank and the forming cavity 101 according to the design calculation result, the same lifting speed of the internal pressure and the external pressure is ensured, the pressure on the outer surface of the tube blank is the back pressure, the pressure on the inner surface of the tube blank is the internal pressure, the first pressurizing port 600 is closed when the back pressure reaches the design requirement, argon is continuously introduced into the tube blank until the internal pressure reaches the forming pressure requirement, and the second pressurizing port 700 is kept open, so that the pressure in the tube blank is ensured to be stable in the forming process.
S500: when the pipe blank is in the second forming state, the first seal assembly 300 and the second seal assembly 400 are moved in a direction approaching each other by the pressure member 500, and the pipe blank is formed into the third forming state, wherein when the pipe blank is in the third forming state, the internal pressure of the pipe blank is controlled to be higher than the external pressure for a time period of 5min or more, and the metal bellows is formed.
In step S500, when the blank is in the second forming state, the pressure member 500 is started, the pressure member 500 is moved downward at a predetermined speed, and the blank is compressed to perform the bellows forming process until the die is completely pressed; the position of the first sealing member 300 is maintained unchanged, the internal pressure is lowered to slightly higher than the back pressure for a duration of 5 minutes or more, and then the back pressure and the internal pressure are sequentially unloaded, and then the case 100 is opened, and the formed bellows product is taken out.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.
In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the invention.
Claims (8)
1. A metal bellows plastic forming apparatus, comprising:
a case (100), wherein a closed forming cavity (101) is formed inside the case (100);
The guide assembly (200) is arranged in the forming cavity (101) and is used for bearing a guide tube blank;
a first seal assembly (300), the first seal assembly (300) being disposed at one end of the tube blank;
A second seal assembly (400), wherein the second seal assembly (400) is arranged at the other end of the tube blank, and a closed space is formed inside the tube blank through the first seal assembly (300) and the second seal assembly (400);
-a pressure member (500), the pressure member (500) sliding through the tank (100), one end of the pressure member (500) being in contact with the first sealing assembly (300);
A first pressurization port (600), the first pressurization port (600) being in communication with the forming cavity (101) for controlling the pressure within the forming cavity (101);
a second pressurizing port (700), the second pressurizing port (700) penetrating through the case (100) and the second sealing assembly (400), the second pressurizing port (700) communicating with the inside of the tube blank for controlling the pressure inside the tube blank;
The guide assembly (200) comprises:
the three guide posts (210) are annularly and equidistantly arranged in the forming cavity (101), and the guide posts (210) are rotatably arranged at the bottom of the box body (100);
the guide assembly (200) further comprises:
At least two grooves (220), wherein the at least two grooves (220) are equidistantly arranged on the outer surface of the guide post (210) along the height direction of the guide post (210);
The cushion blocks (230) are arranged in the grooves (220), and a bearing space (201) for bearing the die is formed between every two adjacent cushion blocks (230).
2. A metal bellows plastic forming apparatus according to claim 1, wherein: the guide assembly (200) further comprises:
The arc-shaped positioning bolt (240), the arc-shaped positioning bolt (240) is threaded through the side wall of the box body (100), and one end of the arc-shaped positioning bolt (240) located in the forming cavity (101) is in contact with the guide post (210).
3. A metal bellows plastic forming apparatus according to claim 1, wherein: the first seal assembly (300) includes:
a first sealing plate (310);
The first sealing bulge (320), the first sealing bulge (320) is fixedly arranged on one side end face of the first sealing plate (310), and the first sealing bulge (320) is inserted into one end of the tube blank.
4. A metal bellows plastic forming apparatus according to claim 3, wherein: the first seal assembly (300) further includes:
The first sealing ring (330) is arranged between the first sealing bulge (320) and the tube blank and is used for sealing one end of the tube blank.
5. A metal bellows plastic forming apparatus according to claim 1, wherein: the second seal assembly (400) includes:
a second sealing plate (410);
the second sealing bulge (420), the second sealing bulge (420) is fixedly arranged on one side end face of the second sealing plate (410), and the second sealing bulge (420) is inserted into the other end of the tube blank.
6. A metal bellows plastic forming apparatus according to claim 5, wherein: the second seal assembly (400) further comprises:
And the second sealing ring (430) is arranged between the second sealing bulge (420) and the tube blank and is used for sealing the other end of the tube blank.
7. A metal bellows plastic forming apparatus according to claim 2, wherein: at least two arc-shaped positioning bolts (240) are arranged, and at least two arc-shaped positioning bolts (240) are equidistantly arranged on the side wall of the box body (100) along the height direction of the guide column (210).
8. A method for plastic forming a metal corrugated tube, characterized by controlling the plastic forming apparatus for a metal corrugated tube according to any one of claims 1 to 7, comprising:
s100: installing the guide assembly (200) in the forming cavity (101) according to preset parameters;
s200: installing a tube blank in the guide assembly (200) and sealing the tube blank by a first sealing assembly (300) and a second sealing assembly (400);
s300: pressurizing the sealed tube blank to enable the tube blank to form a first forming state;
S400: pressurizing the inside of the forming cavity (101) when the pipe blank is in the first forming state, so that the pipe blank is in the second forming state;
S500: and when the pipe blank is in the second forming state, the first sealing assembly (300) and the second sealing assembly (400) are moved towards each other by a pressure piece (500) to enable the pipe blank to be in a third forming state, wherein when the pipe blank is in the third forming state, the internal pressure of the pipe blank is controlled to be higher than the external pressure, and the duration time of the internal pressure is controlled to be greater than or equal to 5min, so that the metal corrugated pipe is generated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311671655.7A CN117358817B (en) | 2023-12-07 | 2023-12-07 | Plastic forming device and plastic forming method for metal corrugated pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311671655.7A CN117358817B (en) | 2023-12-07 | 2023-12-07 | Plastic forming device and plastic forming method for metal corrugated pipe |
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| CN117358817B true CN117358817B (en) | 2024-04-16 |
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| CN110000271A (en) * | 2019-05-21 | 2019-07-12 | 哈尔滨工业大学 | A kind of bellows electromagnetic pulse forming device and method |
| CN111619095A (en) * | 2020-05-21 | 2020-09-04 | 洛阳双瑞特种装备有限公司 | External pressure internal reinforced corrugated pipe forming device |
| CN116550758A (en) * | 2023-07-06 | 2023-08-08 | 太原理工大学 | Efficient sizing adjustment skew rolling equipment and method for seamless metal corrugated composite pipe |
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2023
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| CN1383943A (en) * | 2002-06-14 | 2002-12-11 | 张凯锋 | Superplastic forming process of titanium alloy corrugated pipe |
| CN103521588A (en) * | 2013-10-28 | 2014-01-22 | 哈尔滨工业大学 | Current-assisted titanium alloy bellows hot-forming tool and method |
| CN107413915A (en) * | 2017-08-08 | 2017-12-01 | 洛阳双瑞特种装备有限公司 | A kind of bellows with straight section clamping device has capsule shaping dies |
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| CN117358817A (en) | 2024-01-09 |
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