CN108526285B - Internal high-pressure forming device and method for long branch pipe Y-pipe hollow member - Google Patents
Internal high-pressure forming device and method for long branch pipe Y-pipe hollow member Download PDFInfo
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- CN108526285B CN108526285B CN201810488924.9A CN201810488924A CN108526285B CN 108526285 B CN108526285 B CN 108526285B CN 201810488924 A CN201810488924 A CN 201810488924A CN 108526285 B CN108526285 B CN 108526285B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 12
- 238000003754 machining Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000005336 cracking Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 12
- 238000000465 moulding Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 6
- 239000010963 304 stainless steel Substances 0.000 description 5
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000001502 supplementing effect Effects 0.000 description 4
- 239000002905 metal composite material Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013589 supplement Substances 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
- B21D26/037—Forming branched tubes
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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
- B21D26/047—Mould construction
-
- 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
- B21D26/049—Deforming bodies having a closed end
Abstract
The invention discloses an internal high-pressure forming device and a method thereof for a long branch pipe Y-pipe hollow member, which belong to the technical field of manufacturing of hollow metal members and comprise a fixed die and a movable slide block arranged in the fixed die, wherein cavities for placing a tube blank to be processed are arranged in the fixed die and the movable slide block, a left feeding punch and a left water inlet are arranged at the left feeding end of the cavity of the fixed die, a right feeding punch and a right water inlet are arranged at the right feeding end of the cavity of the fixed die, the movable slide block is kept motionless in the fixed die in the forming process, and the middle part of the tube blank to be processed is swelled and contacted with the movable slide block under the combined action of the left and right feeding punches and the pressure in the cavity, and the movable slide block is closed and shaped to obtain a Y-pipe internal high-pressure forming part. The invention effectively solves the problem of difficult feeding of the Y-pipe parts, improves the uniformity of wall thickness, and effectively prevents cracking and necking.
Description
Technical Field
The invention relates to an internal high-pressure forming device and method for a hollow member, in particular to an internal high-pressure forming device and method for a long branch pipe Y-pipe hollow member, and belongs to the technical field of manufacturing of hollow metal members.
Background
The realization of automobile weight reduction is a trend of modern automobile development, besides the application of light high-strength materials, the utilization of an internal high-pressure forming technology is a main way for realizing automobile weight reduction, a long branch pipe Y-pipe hollow component is an important component part of an automobile exhaust system, a traditional stamping and welding forming process is one of methods for manufacturing Y-pipe parts, a plate is stamped into a plurality of parts, and the parts are welded together, the method can lead to stress concentration at a welding line, welding deformation of the parts occurs after welding, the dimensional precision of the parts is affected, the surface quality of the parts is poor, the internal high-pressure forming technology is a revolutionary technology for manufacturing the Y-pipe parts, compared with the stamping and welding technology, the advantage is obvious, the utilization of the technology for manufacturing the bent axis variable-section hollow component is reduced, the materials are saved, and the strength and the rigidity of the materials are improved.
The current method for manufacturing the long branch pipe three-fork pipe hollow component mainly comprises the following steps: the traditional internal high pressure forming method and the stamping of the sheet into several parts, and then welding the parts together. With this conventional method, the following disadvantages may occur:
1. the port is processed and hardened, the material is seriously accumulated, and during internal high-pressure forming, the material supplementing starts from the pipe orifices at the two ends and then continuously and inwards proceeds, and as the deformation amount near the pipe orifices is large, the processing and hardening are serious, the material is seriously accumulated, so that the pipe orifices are more difficult to supplement materials to the branch pipes, the material supplementing resistance is obviously increased, and the top parts of the branch pipes are broken;
2. The wall thickness of the part is suddenly thinned, necking and cracking of the part are often caused, in the forming process, the material flowing towards the middle is continuously reduced due to the serious accumulation of pipe orifice materials, particularly, when a long branch pipe Y-pipe hollow component is formed, the wall thickness of the part is suddenly thinned, the top of the branch pipe is likely to be cracked and necked, and the quality of the formed part is seriously affected.
Disclosure of Invention
The invention mainly aims to provide an internal high-pressure forming device and method for a long branch pipe Y-pipe hollow member, and solves the problems that the height of a branch pipe existing in the traditional internal high-pressure forming method for directly bulging a Y-pipe through an original pipe blank cannot be ensured, wrinkling is often generated at the end part of the branch pipe in the forming process, cracking is often generated at the top of the branch pipe, the forming quality of parts is affected and the production efficiency is reduced.
The aim of the invention can be achieved by adopting the following technical scheme:
The utility model provides a long branch pipe three-fork hollow member's interior high pressure forming device, is in including fixed mould and setting movable slide in the fixed mould, fixed mould with all be provided with in the movable slide and be used for placing the cavity of waiting to process the pipe, be located the left feeding end of fixed mould's cavity is equipped with left feeding drift, be equipped with left water inlet in the left feeding drift, be located the right feeding end of fixed mould's cavity is equipped with right water inlet drift, be equipped with right water inlet in the right water inlet drift.
Preferably, in the forming process, the movable slide block is kept motionless in the fixed die, under the combined action of the left feeding punch, the right feeding punch and the pressure in the cavity, the middle part of the tube blank to be processed is expanded and contacted with the movable slide block, and the movable slide block is closed and shaped to obtain the high-pressure formed part in the Y-shaped tube.
Preferably, a bulge is arranged in the middle of the movable slide block, the middle part of the tube blank to be processed is swelled and contacted with the bulge in the middle of the movable slide block, and the movable slide block is closed and shaped to obtain a high-pressure forming part in the Y-shaped tube.
Preferably, the fixed die is symmetrically arranged along the central line of the bulge in the middle of the movable sliding block.
Preferably, the left feeding punch and the right feeding punch are symmetrically arranged at two sides of the fixed die respectively.
Preferably, the left water inlet is communicated with the right water inlet.
An internal high-pressure forming method of a long branch pipe Y-pipe hollow member comprises the following steps:
Step 1: placing the initial tube blank into a fixed die, and closing the upper die and the lower die;
step 2: sealing the left and right ends of the initial tube blank, and injecting high-pressure liquid through the left and right water inlets;
step 3: the hydraulic cylinder is utilized to push the left feeding punch and the right feeding punch to realize axial feeding, and the middle part of the pipe fitting bulges out under the internal pressure and the feeding of the left feeding punch and the right feeding punch;
Step 4: keeping the internal pressure of the tube blank unchanged, slowly closing the movable sliding block, and extruding the existing convex position;
Step 5: shaping under high pressure to obtain the final shape of the formed part;
step 6: releasing pressure, opening the mould and taking out the final formed part;
Step 7: and machining the final formed part to obtain two Y-pipe parts.
In step 3, the middle blank is raised to be in contact with the movable sliding block, and the liquid pressure is applied to the inside of the initial tube blank and the axial feeding is performed.
Further, in the step 5, the movable sliding block is closed, and the inside of the pipe blank is pressurized.
Further, the formed tube blank may be either a single metal tube blank or a double metal composite tube blank.
The beneficial technical effects of the invention are as follows:
1. According to the internal high-pressure forming device and the method for the long branch pipe three-fork hollow member, the internal high-pressure forming device and the method for the long branch pipe three-fork hollow member solve the problems that the height of a branch pipe cannot be ensured, wrinkling is often generated at the end part of the branch pipe, cracking is often generated at the top part of the branch pipe, the forming quality of parts is affected, and the production efficiency is reduced in the existing internal high-pressure forming method by directly bulging an original pipe blank to form the three-fork pipe.
2. According to the internal high-pressure forming device and the method for the long branch pipe three-fork pipe hollow member, the internal high-pressure forming device and the method for the long branch pipe three-fork pipe hollow member provide a novel forming method for forming the long branch pipe three-fork pipe hollow member; the problem of difficult material supplementing of the long branch pipe Y-pipe hollow component is effectively solved, and the method has important significance for improving the uniformity of wall thickness and effectively preventing cracking, necking and the like; the method is simple and feasible, has high production efficiency, and has important engineering application value in the engineering fields of automobiles, aerospace and the like.
Drawings
FIG. 1 is a schematic view showing an initial tube blank and a die assembly of a preferred embodiment of an internal high pressure forming apparatus for a long branch tube furcation tube hollow member according to the present invention;
FIG. 2 is a schematic illustration of an intermediate blank and mold assembly of a preferred embodiment of an internal high pressure forming apparatus for a long branch furcation hollow member in accordance with the present invention;
FIG. 3 is a schematic view of the assembly of forming parts and final dies of a preferred embodiment of an internal high pressure forming apparatus for a long branch furcation hollow member in accordance with the present invention;
FIG. 4 is a schematic view of the final formed part structure of a preferred embodiment of the internal high pressure forming apparatus of the long branch furcation hollow member according to the present invention;
Fig. 5 is a schematic view of a preferred embodiment of the internal high pressure forming apparatus of the long branch tube furcation tube hollow member of fig. 4, taken along A-A.
In the figure: 1-left feeding punch, 2-left water inlet, 3-fixed die, 4-movable slide block, 5-pipe blank to be processed, 6-right water inlet and 7-right water inlet punch.
Detailed Description
In order to make the technical solution of the present invention more clear and obvious to those skilled in the art, the present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1-5, the internal high pressure forming device for a long branch pipe three-fork hollow member provided in this embodiment includes a fixed die 3 and a movable slide block 4 disposed in the fixed die 3, cavities for placing a tube blank 5 to be processed are disposed in the fixed die 3 and the movable slide block 4, a left feeding end of the cavity located in the fixed die 3 is provided with a left feeding punch 1, a left water inlet 2 is disposed in the left feeding punch 1, a right feeding end of the cavity located in the fixed die 3 is provided with a right water inlet punch 7, a right water inlet is disposed in the right water inlet punch 7, during forming, the movable slide block 4 is kept motionless in the fixed die 3, under the combined action of the left feeding punch 1, the right water inlet punch 7 and the pressure in the cavity, the middle portion of the tube blank 5 to be processed is expanded and contacts with the movable slide block 4, and the movable slide block 4 is closed and shaped to obtain a three-fork internal high pressure formed part.
In this embodiment, as shown in fig. 1 to 5, a protrusion is disposed in the middle of the movable slider 4, the middle portion of the tube blank 5 to be processed is swelled and contacts with the protrusion in the middle of the movable slider 4, the movable slider 4 is closed and shaped to obtain a high-pressure forming part in a furcate tube, the fixed die 3 is symmetrically disposed along a middle line of the protrusion in the middle of the movable slider 4, the left feeding punch 1 and the right feeding punch 7 are symmetrically disposed on two sides of the fixed die 3 respectively, and the left water inlet 2 is communicated with the right water inlet 6.
The embodiment provides an internal high-pressure forming method of a long branch pipe Y-pipe hollow member, which comprises the following steps:
Step 1: placing the initial tube blank into a fixed die, and closing the upper die and the lower die;
step 2: sealing the left and right ends of the initial tube blank, and injecting high-pressure liquid through the left and right water inlets;
Step 3: the hydraulic cylinder is used for pushing the left feeding punch and the right feeding punch to realize axial feeding, the middle part of the pipe fitting is bulged to form a bulge under the internal pressure and the feeding of the left feeding punch and the right feeding punch, the middle blank bulges to be contacted with the movable sliding block, and the axial feeding is carried out while the liquid pressure is applied to the inside of the initial pipe blank
Step 4: keeping the internal pressure of the tube blank unchanged, slowly closing the movable sliding block, and extruding the existing convex position;
Step 5: shaping under high pressure to obtain the final shape of the formed part, and maintaining the pressure in the pipe blank while the movable slide block is closed;
step 6: releasing pressure, opening the mould and taking out the final formed part;
step 7: and machining the final formed part to obtain two Y-pipe parts, wherein the formed pipe blank can be a single metal pipe blank or a double metal composite pipe blank.
In this embodiment, a process for forming 304 stainless steel four-joint pipe, carbon steel/stainless steel bimetal composite three-joint pipe, and low carbon steel six-joint pipe will be described in detail by way of specific examples.
The inner high-pressure forming device of the long branch pipe Y-shaped pipe hollow member adopted in the following embodiment comprises a fixed die, a movable slide block, a left feeding punch, a right feeding punch, a left water inlet and a right water inlet, wherein in the forming process, a cavity formed by initial matching of the fixed die and the movable slide block is firstly used, and finally, a final forming cavity is formed by final matching of the fixed die and the movable slide block.
For example, forming a stainless steel tube with four projections requires a preform mold having a first cavity of the same shape as the two middle projections, and a subsequent forming mold (i.e., a final forming mold) having, in addition to the first cavity, a second cavity adjacent to the first cavity of the same shape as the projections on either side of the middle projection of the final formed part (designated as the second projections).
Two or more subsequent forming dies may be provided as needed, for example, in the case where a third protrusion is provided between the first protrusion and the second protrusion, two subsequent forming dies (an intermediate forming die, one is a final forming die) are required, the intermediate forming die has a third cavity having the same shape as the third protrusion in addition to the first cavity, and the final forming die has a third cavity having the same shape as the third protrusion in addition to the first cavity and the second cavity; similarly, in the case of a molded article having a fourth protrusion, three subsequent molding dies (two intermediate molding dies and one final molding die) are required, the first intermediate molding die being identical to the intermediate molding die described above, the second intermediate molding die having a fourth cavity having the same shape as the fourth protrusion in addition to the first cavity, the second cavity, and the third cavity, and the final molding die having a fourth cavity having the same shape as the fourth protrusion in addition to the first cavity, the second cavity, and the third cavity; and so on, will not be described in detail.
Example 1:
as shown in fig. 1-5, the present embodiment forms a furcation tube part with two branch tubes, and first forms the middle protrusion to obtain the final shape of the "one-die two-piece" part.
Step 1: putting a 304 stainless steel tube blank with the length of 300mm, the diameter of 50mm and the wall thickness of 2mm into a fixed die, closing the upper die and the lower die, and forming a free bulging die cavity by the fixed die and a movable sliding block;
Step 2: sealing the left end and the right end of the 304 stainless steel tube blank, and injecting high-pressure liquid (water) through a left water inlet and a right water inlet;
step 3: the hydraulic cylinder is used for pushing the left feeding punch and the right feeding punch to realize axial feeding, the middle bulge is contacted with the movable sliding block, and pressure maintaining is carried out (3-5 minutes);
step 4: closing the movable slide block and fixing the mold to form a final mold cavity, continuously introducing high-pressure liquid to perform bulging and maintaining the pressure for 3-5 minutes to obtain a 'one-mold two-piece' Y-shaped pipe part;
step 5: releasing pressure, opening the final forming die and taking out the forming piece;
step 6: and machining the formed part to obtain the final Y-pipe part.
Example 2:
as shown in fig. 1-5, the present embodiment forms a furcation tube part with two branch tubes, and first forms the middle protrusion to obtain the final shape of the "one-die two-piece" part.
Step 1: placing a brass tube blank with the length of 300mm, the diameter of 50mm and the wall thickness of 2mm into a fixed die, and closing the upper die and the lower die, wherein the fixed die and a movable sliding block form a free bulging die cavity;
Step 2: sealing the left end and the right end of the 304 stainless steel tube blank, and injecting high-pressure liquid (water) through a left water inlet and a right water inlet;
step 3: the hydraulic cylinder is used for pushing the left feeding punch and the right feeding punch to realize axial feeding, the middle bulge is contacted with the movable sliding block, and pressure maintaining is carried out (3-5 minutes);
step 4: closing the movable slide block and fixing the mold to form a final mold cavity, continuously introducing high-pressure liquid to perform bulging and maintaining the pressure for 3-5 minutes to obtain a 'one-mold two-piece' Y-shaped pipe part;
step 5: releasing pressure, opening the final forming die and taking out the forming piece;
step 6: and machining the formed part to obtain the final Y-pipe part.
Example 3:
as shown in fig. 1-5, the present embodiment forms a furcation tube part with two branch tubes, and first forms the middle protrusion to obtain the final shape of the "one-die two-piece" part.
Step 1: placing an aluminum alloy tube blank with the length of 300mm, the diameter of 50mm and the wall thickness of 2mm into a fixed die, and closing the upper die and the lower die, wherein the fixed die and a movable sliding block form a free bulging die cavity;
Step 2: sealing the left end and the right end of the 304 stainless steel tube blank, and injecting high-pressure liquid (water) through a left water inlet and a right water inlet;
step 3: the hydraulic cylinder is used for pushing the left feeding punch and the right feeding punch to realize axial feeding, the middle bulge is contacted with the movable sliding block, and pressure maintaining is carried out (3-5 minutes);
step 4: closing the movable slide block and fixing the mold to form a final mold cavity, continuously introducing high-pressure liquid to perform bulging and maintaining the pressure for 3-5 minutes to obtain a 'one-mold two-piece' Y-shaped pipe part;
step 5: releasing pressure, opening the final forming die and taking out the forming piece;
step 6: and machining the formed part to obtain the final Y-pipe part.
In summary, in this embodiment, according to the internal high-pressure forming device and the method for the long branch pipe tri-fork hollow member of the present embodiment, the internal high-pressure forming device and the method for the long branch pipe tri-fork hollow member provided by the present embodiment solve the problems that the existing internal high-pressure forming method cannot guarantee the height of the branch pipe existing by directly bulging the original pipe blank, the end part of the branch pipe is wrinkled, the top part of the branch pipe is cracked, the forming quality of the part is affected, and the production efficiency is reduced in the forming process; a novel forming method is provided for forming the long branch pipe Y-pipe hollow member; the problem of difficult material supplementing of the long branch pipe Y-pipe hollow component is effectively solved, and the method has important significance for improving the uniformity of wall thickness and effectively preventing cracking, necking and the like; the method is simple and feasible, has high production efficiency, and has important engineering application value in the engineering fields of automobiles, aerospace and the like.
The above description is merely a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art will be able to apply equivalents and modifications according to the technical solution and the concept of the present invention within the scope of the present invention disclosed in the present invention.
Claims (5)
1. The inner high-pressure forming device for the long branch pipe three-fork hollow member is characterized by comprising a fixed die (3) and a movable slide block (4) arranged in the fixed die (3), wherein cavities for placing a tube blank (5) to be processed are formed in the fixed die (3) and the movable slide block (4), a left feeding end of the cavity positioned in the fixed die (3) is provided with a left feeding punch (1), a left water inlet (2) is formed in the left feeding punch (1), a right feeding end of the cavity positioned in the fixed die (3) is provided with a right water inlet punch (7), a right water inlet (6) is formed in the right water inlet punch (7), in the forming process, the movable slide block (4) is kept motionless in the fixed die (3), under the combined action of the right water inlet punch (7) and the pressure in the cavity, the middle part of the tube blank (5) to be processed is expanded and contacted with the movable slide block (4), the movable slide block (4) is closed to obtain a left water inlet (2), the middle part of the three-fork hollow member to be processed is formed, the middle part of the movable slide block (4) is contacted with the movable slide block (4) to obtain a bulge (4), the fixed die (3) is symmetrically arranged along the convex central line of the middle part of the movable sliding block (4), the left feeding punch (1) and the right feeding punch (7) are symmetrically arranged on two sides of the fixed die (3) respectively, and the left water inlet (2) is communicated with the right water inlet (6).
2. An internal high pressure forming method using the internal high pressure forming device for a long branch tube three-pronged hollow member according to claim 1, comprising the steps of:
step 1: placing a pipe blank to be processed into a fixed die, and closing the upper die and the lower die;
step 2: sealing the left end and the right end of the tube blank to be processed, and injecting high-pressure liquid through a left water inlet and a right water inlet;
step 3: the hydraulic cylinder is utilized to push the left feeding punch and the right feeding punch to realize axial feeding, and the middle part of the pipe fitting bulges out under the internal pressure and the feeding of the left feeding punch and the right feeding punch;
step 4: keeping the internal pressure of the tube blank unchanged, slowly closing the movable sliding block, and extruding the existing convex position; step 5: shaping under high pressure to obtain the final shape of the formed part;
step 6: releasing pressure, opening the mould and taking out the final formed part;
Step 7: and machining the final formed part to obtain two Y-pipe parts.
3. The internal high pressure forming method according to claim 2, wherein in the step 3, the intermediate blank is raised to be in contact with the movable slider, and the axial feeding is performed while applying the liquid pressure to the inside of the tube blank to be processed.
4. The internal high pressure forming method according to claim 2, wherein in the step 5, the movable slider is closed while maintaining the pressure inside the tube blank.
5. The internal high pressure forming method according to claim 2, wherein the formed tube blank is a single metal tube blank or a bimetal composite tube blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810488924.9A CN108526285B (en) | 2018-05-21 | 2018-05-21 | Internal high-pressure forming device and method for long branch pipe Y-pipe hollow member |
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| CN201810488924.9A CN108526285B (en) | 2018-05-21 | 2018-05-21 | Internal high-pressure forming device and method for long branch pipe Y-pipe hollow member |
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| CN108526285B true CN108526285B (en) | 2024-04-30 |
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| CN109821960B (en) * | 2019-03-26 | 2023-12-12 | 桂林电子科技大学 | Impact hydraulic composite forming device for metal thin-wall pipe |
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| CN208214024U (en) * | 2018-05-21 | 2018-12-11 | 南京航威智造科技有限公司 | A kind of internal high pressure forming device of long branch pipe Y-pipe hollow unit |
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2018
- 2018-05-21 CN CN201810488924.9A patent/CN108526285B/en active Active
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| JPS63260632A (en) * | 1987-04-16 | 1988-10-27 | Katsuteru Araki | Liquid pressure bulging method |
| DE19518252A1 (en) * | 1995-05-18 | 1996-11-21 | Schaefer Maschbau Wilhelm | Production of metallic hollow body using high internal pressure |
| JPH10277649A (en) * | 1997-04-02 | 1998-10-20 | Hitachi Ltd | Method for forming bent tube of dissimilar cross section |
| JP2000117341A (en) * | 1998-10-15 | 2000-04-25 | Calsonic Corp | Tube bulging method |
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