CN112719085A - Forming die for preventing stainless steel pipe from cracking and wrinkling - Google Patents
Forming die for preventing stainless steel pipe from cracking and wrinkling Download PDFInfo
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- CN112719085A CN112719085A CN202011598876.2A CN202011598876A CN112719085A CN 112719085 A CN112719085 A CN 112719085A CN 202011598876 A CN202011598876 A CN 202011598876A CN 112719085 A CN112719085 A CN 112719085A
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- 238000005336 cracking Methods 0.000 title claims abstract description 31
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 27
- 239000010935 stainless steel Substances 0.000 title claims abstract description 27
- 238000005452 bending Methods 0.000 claims abstract description 84
- 238000003825 pressing Methods 0.000 claims description 42
- 238000007493 shaping process Methods 0.000 claims description 28
- 238000005056 compaction Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 21
- 230000002441 reversible effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a forming die for preventing stainless steel pipes from cracking and wrinkling, which comprises a supporting table, a fixed die fixing plate and a movable die top plate, the fixed die fixing plate is arranged on the supporting table, the movable die top plate is arranged above the fixed die fixing plate, a punch forming structure is arranged between the fixed die fixing plate and the movable die top plate, and a stretching anti-deformation component is arranged in the pre-bending die, so that in the pre-bending operation process, the position of the pipe fitting to be pressurized and deformed is subjected to reverse tensile deformation, so that the wall thickness and the stress state of the pipe fitting at the bending position are improved in a tensile reverse deformation mode, and then the condition that the pipe fittings are locally cracked in the subsequent pressurizing and forming process is avoided, meanwhile, the forming component is matched with the hydraulic forming component to perform integrated operation, the pipe fittings subjected to pre-bending forming are placed in the forming component, and the hydraulic forming component is controlled to perform internal high-pressure forming on the pipe fittings.
Description
Technical Field
The invention relates to the technical field of stainless steel pipe processing, in particular to a forming die for preventing a stainless steel pipe from cracking and wrinkling.
Background
The existing mature technology for products with high requirements on the surface profile of pipe fittings is generally manufactured by an internal high-pressure process, which is also called hydraulic forming or hydraulic forming, and the internal high-pressure forming process is a material forming process for forming hollow parts by controlling internal pressure and material flow by using liquid as a forming medium. For parts with curved axes, a pipe blank needs to be pre-bent into a shape close to the shape of the part and then is subjected to pressure forming, the member subjected to internal high-pressure forming has light weight, good product quality, flexible product design and simple process, and has the characteristics of near-net forming, green manufacturing and the like, so the member is widely applied to the field of automobile lightweight, axially bent special-shaped pipe fittings are widely applied to the fields of automobiles, aviation, aerospace and the like and are commonly used in automobile air inlet parts, automobile body structures and pipelines of various systems of aerospace, the liquid filling forming process is a main method for forming the tubular parts, two sets of internal high-pressure forming dies, namely a set of liquid filling and bending pre-forming die and a set of internal high-pressure forming die, are required in the prior art, otherwise, the risk of pipe fittings cracking is high, the production requirements can not be met almost, the die cost is high, and the cost of manual operation is required subsequently, in view of the above, the present invention has been made in view of the above problems.
Disclosure of Invention
The invention aims to solve the problems, designs a forming die for preventing stainless steel pipes from cracking and wrinkling, and solves the problems in the background art.
The technical scheme of the invention for realizing the aim is as follows: a forming die for preventing stainless steel pipes from cracking and wrinkling comprises a supporting table, a fixed die fixing plate and a movable die top plate, wherein the fixed die fixing plate is arranged on the supporting table, the movable die top plate is arranged above the fixed die fixing plate, and a pressurizing forming structure is arranged between the fixed die fixing plate and the movable die top plate;
the pressure-charging molding structure comprises: the mould subassembly is bent in pre-compaction and fills and form the subassembly, the lower part of the mould subassembly is bent in pre-compaction sets up on the cover half fixed plate, the upper portion of the mould subassembly is bent in pre-compaction sets up on the lower terminal surface of movable mould roof, be provided with tensile anti-deformation component in the mould subassembly of pre-compaction, fill and form the type subassembly and set up in mould subassembly one side of pre-compaction and two upper and lower parts and be connected with cover half fixed plate and movable mould roof respectively, the both sides of filling and forming the subassembly are provided with hydraulic pressure and fill the shape component.
The pre-bending die assembly comprises: the prepressing bending device comprises a prepressing bending lower die and a prepressing bending upper die, wherein the prepressing bending lower die is arranged on a fixed die fixing plate, and the prepressing bending upper die is arranged on a movable die top plate and is symmetrically arranged with the prepressing bending lower die.
The contact surfaces of the pre-bending lower die and the pre-bending upper die are S-shaped curved surfaces which are matched with each other.
And the inner sides of the contact surfaces of the pre-bending lower die and the pre-bending upper die are respectively and correspondingly provided with pre-pressing forming grooves.
The stretching anti-deformation component is arranged in the pre-pressing forming groove at a certain interval, and the stretching anti-deformation component is a hard metal blocky bulge.
The fill-form assembly comprises: fill the shape lower mould and fill the shape and go up the mould, fill the shape lower mould and set up on the cover half fixed plate, fill the shape and go up the mould and set up on the lower terminal surface of movable mould roof, and with fill shape lower mould symmetrical arrangement.
And forming integral grooves are symmetrically formed in the lower filling die and the upper filling die respectively, and the shapes of the forming integral grooves are consistent with the external shapes of the pipe fittings to be processed.
And a plurality of material ejecting pins are arranged in the lower shaping die.
Fill the up end of shape lower mould and seted up a plurality of arc cooperation grooves, the lower terminal surface of filling the shape upper die is provided with a plurality of arc lugs, arc lug and arc cooperation groove phase-match.
The liquid filling pressure of the hydraulic filling member is 0-30 MPa. .
The forming die for preventing the stainless steel pipe from cracking and wrinkling, which is manufactured by the technical scheme of the invention, is characterized in that a stretching anti-deformation component is arranged in a pre-pressing bending die, so that the position of the pipe to be subjected to pressurizing deformation is subjected to reverse stretching deformation in the pre-pressing bending operation process, the wall thickness and the stress state of the pipe at the bending position are improved in a stretching anti-deformation mode, the local cracking of the pipe in the subsequent pressurizing forming process is further avoided, meanwhile, a forming component is filled to cooperate with a hydraulic forming component to perform integrated operation, the pipe subjected to pre-pressing bending forming is placed in a forming component, the hydraulic forming component is controlled to perform high-pressure preforming on the pipe, the hydraulic pressure is 10-15MPa, the pipe is subjected to primary forming, after the primary forming, the forming component is controlled to be matched with the die, the hydraulic pressure is increased to 25MPa, and under the cooperation action of the forming, the shaping and shaping of the axially bent special-shaped pipe fitting are realized, the conditions of cracking and wrinkling of the pipe fitting are effectively avoided while the shaping quality is ensured, only one set of internal high-pressure forming die is adopted to solve the problem of pipe fitting scratch or dead fold caused by direct die assembly, and the processing cost for producing the products is reduced.
Drawings
FIG. 1 is an isometric view of a forming die for preventing stainless steel pipes from cracking and wrinkling in a matched mold state.
FIG. 2 is an axonometric view of the forming die for preventing the stainless steel pipe from cracking and wrinkling in the open state.
Fig. 3 is a schematic top view of the forming mold for preventing stainless steel pipes from cracking and wrinkling according to the present invention, shown in fig. 2.
Fig. 4 is a schematic bottom view of the forming mold for preventing stainless steel pipes from cracking and wrinkling according to the present invention.
FIG. 5 is a schematic sectional view of a pre-bending mold assembly of a forming mold for preventing stainless steel pipes from cracking and wrinkling in a closed state.
Fig. 6 is a schematic structural diagram of a finished product processed by the forming die for preventing the stainless steel pipe from cracking and wrinkling.
In the figure: 1-a support table; 2-fixing the die fixing plate; 3-moving the die top plate; 4-stretching the reversible deformation member; 5-pre-bending the lower die; 6-prepressing and bending the upper die; 7-prepressing a forming groove; 8-filling a lower die; 9-filling the upper mold; 10-forming a shaping groove; 11-a liftout pin; 12-hydraulic shaping member.
Detailed Description
The invention is described in detail with reference to the accompanying drawings, and as shown in fig. 1-6, a forming die for preventing stainless steel pipes from cracking and wrinkling comprises a supporting table 1, a fixed die fixing plate 2 and a movable die top plate 3, wherein the fixed die fixing plate 2 is arranged on the supporting table 1, the movable die top plate 3 is arranged above the fixed die fixing plate 2, and a pressurizing forming structure is arranged between the fixed die fixing plate 2 and the movable die top plate 3; the pressure-charging molding structure comprises: the hydraulic forming device comprises a pre-pressing bending die assembly and a forming filling assembly, wherein the lower part of the pre-pressing bending die assembly is arranged on a fixed die fixing plate 2, the upper part of the pre-pressing bending die assembly is arranged on the lower end surface of a movable die top plate 3, a stretching anti-deformation component 4 is arranged in the pre-pressing bending die assembly, the forming filling assembly is arranged on one side of the pre-pressing bending die assembly, the upper part and the lower part of the forming filling assembly are respectively connected with the fixed die fixing plate 2 and the movable die top plate 3, and hydraulic forming filling components 12 are arranged on two sides; the pre-bending die assembly comprises: the device comprises a pre-pressing bending lower die 5 and a pre-pressing bending upper die 6, wherein the pre-pressing bending lower die 5 is arranged on a fixed die fixing plate 2, and the pre-pressing bending upper die 6 is arranged on a movable die top plate 3 and is symmetrically arranged with the pre-pressing bending lower die 5; the contact surfaces of the pre-bending lower die 5 and the pre-bending upper die 6 are S-shaped curved surfaces which are matched with each other; the inner sides of the contact surfaces of the pre-bending lower die 5 and the pre-bending upper die 6 are respectively and correspondingly provided with pre-pressing forming grooves 7; the stretching anti-deformation component 4 is arranged in the pre-pressing forming groove 7 at a certain interval, and the stretching anti-deformation component 4 is a hard metal block-shaped bulge; the fill-form assembly comprises: the lower die 8 is arranged on the fixed die fixing plate 2, and the upper die 9 is arranged on the lower end surface of the movable die top plate 3 and is symmetrically arranged with the lower die 8; forming and shaping grooves 10 are symmetrically formed in the lower forming die 8 and the upper forming die 9 respectively, and the shapes of the forming and shaping grooves 10 are consistent with the external shapes of the pipe fittings to be processed; a plurality of material ejecting pins 11 are arranged in the lower die 8; a plurality of arc-shaped matching grooves are formed in the upper end face of the lower inflation-shaped die 8, a plurality of arc-shaped lugs are arranged on the lower end face of the upper inflation-shaped die 9, and the arc-shaped lugs are matched with the arc-shaped matching grooves; the liquid filling pressure of the hydraulic filling member 12 is 0-30 MPa.
The device is characterized by comprising a supporting table 1, a fixed die fixing plate 2 and a movable die top plate 3, wherein the fixed die fixing plate 2 is arranged on the supporting table 1, the movable die top plate 3 is arranged above the fixed die fixing plate 2, and a pressurizing and molding structure is arranged between the fixed die fixing plate 2 and the movable die top plate 3; the pressure forming structure includes: the hydraulic forming device comprises a pre-pressing bending die assembly and a forming assembly, wherein the lower part of the pre-pressing bending die assembly is arranged on a fixed die fixing plate 2, the upper part of the pre-pressing bending die assembly is arranged on the lower end surface of a movable die top plate 3, a stretching anti-deformation component 4 is arranged in the pre-pressing bending die assembly, the forming assembly is arranged on one side of the pre-pressing bending die assembly, the upper part and the lower part of the forming assembly are respectively connected with the fixed die fixing plate 2 and the movable die top plate 3, and hydraulic forming components 12 are arranged on two; the forming die for preventing stainless steel pipes from cracking and wrinkling is characterized in that a stretching anti-deformation component 4 is arranged in a pre-pressing bending die, so that in the pre-pressing bending operation process, the position of a pipe to be subjected to pressurizing deformation is subjected to reverse stretching deformation, the pipe wall thickness and the stress state of the bending position are improved in a stretching anti-deformation mode, the situation that the pipe is locally cracked in the subsequent pressurizing forming process is avoided, meanwhile, a forming component is filled to cooperate with a hydraulic forming component 12 to perform integrated operation, the pipe subjected to pre-pressing bending forming is placed into the forming component, the hydraulic forming component 12 is controlled to perform internal high pressure preforming on the pipe, the hydraulic pressure is 10-15MPa, the pipe is subjected to primary forming, after primary forming, the forming component is controlled to be closed, the hydraulic pressure is increased to 25MPa, and under the cooperation effect of the forming component, forming and shaping of an axially bent special-shaped pipe are realized, when having guaranteed shaping quality, the effectual condition of avoiding the pipe fitting to appear fracture, fold solves the pipe fitting fish tail that direct compound die brought or only adopts one set of interior high pressure forming die of dead fold, reduces the processing cost of producing this type of product.
The following working principles, detailed connecting means thereof, and the following main descriptions of the working principles and processes are well known in the art, and will be referred to by those skilled in the art for the specific connection and operation sequence of the components in this application.
Example (b): as can be seen from the attached figures 1-6 of the specification, the scheme comprises a supporting table 1, a fixed die fixing plate 2 and a movable die top plate 3, wherein the fixed die fixing plate 2 is arranged on the supporting table 1, the movable die top plate 3 is arranged above the fixed die fixing plate 2, and a pressurizing and molding structure is arranged between the fixed die fixing plate 2 and the movable die top plate 3; the above-mentioned pressure forming structure includes: the pipe fitting pre-pressing bending die comprises a pre-pressing bending die assembly and a forming assembly, wherein the lower part of the pre-pressing bending die assembly is arranged on a fixed die fixing plate 2, the upper part of the pre-pressing bending die assembly is arranged on the lower end surface of a movable die top plate 3, a stretching anti-deformation component 4 is arranged in the pre-pressing bending die assembly, the forming assembly is arranged on one side of the pre-pressing bending die assembly, the upper part and the lower part of the forming assembly are respectively connected with the fixed die fixing plate 2 and the movable die top plate 3, hydraulic forming components 12 are arranged on two sides of the forming assembly, and the stretching anti-deformation component 4 is arranged in the pre-pressing bending die assembly, so that the position of the pipe fitting to be subjected to compression deformation is subjected to reverse stretching deformation in the pre-pressing bending operation process, the wall thickness and the stress state of the pipe fitting at the bending position are improved in a stretching anti-, the pipe fitting after the pre-bending forming is placed into the filling forming assembly, the hydraulic filling member 12 is controlled to perform high-pressure preforming on the pipe fitting, the hydraulic pressure is 10-15MPa, the pipe fitting is preliminarily formed, after the preliminary forming, the filling forming assembly die assembly is controlled, the hydraulic pressure is increased to 25MPa, under the cooperation effect of the filling forming assembly, the forming and shaping of the axially bent special-shaped pipe fitting are achieved, the forming quality is guaranteed, the cracking and wrinkling conditions of the pipe fitting are effectively avoided, only one set of inner high-pressure forming die is adopted for solving the problem that the pipe fitting is scratched or becomes a dead fold due to the fact that the die assembly is directly carried out, and the processing cost for producing the products is reduced.
In a specific implementation process, the pre-bending die assembly comprises: a prepressing bending lower die 5 and a prepressing bending upper die 6, wherein the prepressing bending lower die 5 is arranged on the fixed die fixing plate 2, the prepressing bending upper die 6 is arranged on the movable die top plate 3 and is symmetrically arranged with the prepressing bending lower die 5, wherein the contact surfaces of the pre-bending lower die 5 and the pre-bending upper die 6 are S-shaped curved surfaces which are matched with each other, the inner sides of the contact surfaces of the pre-bending lower die 5 and the pre-bending upper die 6 are respectively and correspondingly provided with pre-pressing forming grooves 7, when in use, the raw material pipe fitting is placed in the prepressing forming groove 7 of the prepressing bending lower die 5, the movable die top plate 3 is controlled to be pressed downwards, thereby enabling the pre-pressing bent upper die 6 to descend, closing the pre-pressing bent lower die 5 and the pre-pressing bent upper die 6, under the action of external force, the pipe fitting is subjected to pre-pressing bending deformation, and meanwhile, the stretching anti-deformation component 4 in the pre-pressing forming groove 7 is used for carrying out reverse stretching deformation on the corresponding position of the pipe wall, so that the specific position on the pipe wall is deformed.
In a specific implementation process, the stretching deformation-resistant member 4 is arranged in the pre-pressing forming groove 7 along a certain interval, the stretching deformation-resistant member 4 is a hard metal block-shaped bulge, and the size of the block-shaped bulge can be adjusted according to the size of the pipe fitting and the thickness of the pipe wall.
In a specific implementation, the forming assembly comprises: the pipe fitting shaping device comprises a filling lower die 8 and a filling upper die 9, wherein the filling lower die 8 is arranged on a fixed die fixing plate 2, the filling upper die 9 is arranged on the lower end face of a movable die top plate 3 and is symmetrically arranged with the filling lower die 8, shaping grooves 10 are symmetrically formed in the filling lower die 8 and the filling upper die 9 respectively, the shaping grooves 10 are consistent with the external shape of a pipe fitting to be processed, when the pipe fitting shaping device is used, a pipe fitting subjected to pre-bending forming is placed in the shaping grooves 10, two ends of a hydraulic filling member 12 are connected to two ends of the pipe fitting respectively, pressurization is carried out, the pressurization pressure is 10-15MPa, the pipe fitting is preformed, after preforming, the filling upper die 9 and the filling lower die 8 are controlled to be matched, the pressurization pressure is further increased to 25MPa, and the pipe fitting is subjected to shaping operation in the die.
In the specific implementation process, a plurality of liftout pins 11 are arranged in the lower die 8, after the shaping and shaping operation is completed, the upper die 9 for shaping is controlled to be separated from the lower die 8 for shaping, the liftout pins 11 are controlled to go upwards, the finished pipe fitting is ejected out of the lower die 8 for shaping, and taking is facilitated.
In the concrete implementation in-process, above-mentioned fill the up end of shape lower mould 8 and seted up a plurality of arc cooperation grooves, fill the lower terminal surface that the shape goes up mould 9 and be provided with a plurality of arc lugs, arc lug and arc cooperation groove phase-match, through the cooperation in arc lug and arc cooperation groove, can effectively improve the linkage effect of compound die, guarantee to fill shape lower mould 8 and fill the degree of cooperation that the shape goes up mould 9, improve the shaping quality of pipe fitting.
In the specific implementation process, the liquid filling pressure of the hydraulic filling member 12 is 0-30MPa, and the sectional type filling operation is carried out by matching with a main body die.
To sum up, in the forming die for preventing the stainless steel pipe from cracking and wrinkling, a stretching anti-deformation component 4 is arranged in a pre-bending die, so that in the pre-bending operation process, the position of the pipe to be subjected to pressurizing deformation is subjected to reverse stretching deformation, the pipe wall thickness and the stress state of the bending position are improved in a stretching anti-deformation mode, the situation that the pipe is locally cracked in the subsequent pressurizing forming process is avoided, meanwhile, a forming component is subjected to integrated operation in cooperation with a hydraulic forming component 12, the pipe subjected to pre-bending forming is placed in the forming component, the hydraulic forming component 12 is controlled to perform high-pressure pre-forming on the pipe, the hydraulic pressure is 10-15MPa, the pipe is subjected to primary forming, after primary forming, the forming component is controlled to be matched with the die, the hydraulic pressure is increased to 25MPa, and under the cooperation effect of the forming component, the shaping and shaping of the axially bent special-shaped pipe fitting are realized, the conditions of cracking and wrinkling of the pipe fitting are effectively avoided while the shaping quality is ensured, only one set of internal high-pressure forming die is adopted to solve the problem of pipe fitting scratch or dead fold caused by direct die assembly, and the processing cost for producing the products is reduced.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (10)
1. A forming die for preventing stainless steel pipes from cracking and wrinkling comprises a supporting table (1), a fixed die fixing plate (2) and a movable die top plate (3), and is characterized in that the fixed die fixing plate (2) is arranged on the supporting table (1), the movable die top plate (3) is arranged above the fixed die fixing plate (2), and a pressurizing forming structure is arranged between the fixed die fixing plate (2) and the movable die top plate (3);
the pressure-charging molding structure comprises: the mould subassembly is bent in pre-compaction and fills and form the subassembly, the lower part of the mould subassembly is bent in pre-compaction sets up on cover half fixed plate (2), the upper portion of the mould subassembly that bends in pre-compaction sets up on the lower terminal surface of movable mould roof (3), be provided with tensile anti-deformation component (4) in the mould subassembly that bends in pre-compaction, fill and form the type subassembly and set up in mould subassembly one side that bends in pre-compaction and upper and lower two parts and be connected with cover half fixed plate (2) and movable mould roof (3) respectively, the both sides of filling and forming the subassembly are provided with hydraulic pressure and fill shape component (.
2. The forming die for preventing stainless steel pipes from cracking and wrinkling according to claim 1, wherein the pre-bending die assembly comprises: bending lower mould (5) and prepressing bending upper mould (6) in advance, bending lower mould (5) in advance sets up on cover half fixed plate (2), prepressing bending upper mould (6) set up on movable mould roof (3) and with prepressing bending lower mould (5) symmetrical arrangement.
3. The forming die for preventing the stainless steel pipe from cracking and wrinkling according to claim 2, wherein the contact surfaces of the pre-press bending lower die (5) and the pre-press bending upper die (6) are S-shaped curved surfaces which are matched with each other.
4. The forming die for preventing the stainless steel pipe from cracking and wrinkling according to claim 3, wherein the inner sides of the contact surfaces of the pre-bending lower die (5) and the pre-bending upper die (6) are respectively and correspondingly provided with pre-pressing forming grooves (7).
5. The forming die for preventing the stainless steel pipe from cracking and wrinkling according to claim 4, wherein the stretching deformation-resistant member (4) is arranged in the pre-pressing forming groove (7) at a certain interval, and the stretching deformation-resistant member (4) is a hard metal block-shaped protrusion.
6. The forming die for preventing the stainless steel pipe from cracking and wrinkling according to any one of claims 1 to 5, wherein the forming assembly comprises: fill shape lower mould (8) and fill and shape last mould (9), fill shape lower mould (8) and set up on cover half fixed plate (2), fill and shape last mould (9) set up on the lower terminal surface of movable mould roof (3), and with fill shape lower mould (8) symmetrical arrangement.
7. The forming die for preventing the stainless steel pipe from cracking and wrinkling according to claim 6, wherein forming and shaping grooves (10) are symmetrically formed in the lower filling die (8) and the upper filling die (9), respectively, and the shapes of the forming and shaping grooves (10) are consistent with the external shapes of the pipe fittings to be processed.
8. The forming die for preventing the stainless steel pipe from cracking and wrinkling according to claim 7, wherein a plurality of ejector pins (11) are arranged in the lower filling-forming die (8).
9. The forming die for preventing the stainless steel pipe from cracking and wrinkling according to claim 8, wherein a plurality of arc-shaped matching grooves are formed in the upper end face of the lower filling-shaped die (8), a plurality of arc-shaped convex blocks are arranged on the lower end face of the upper filling-shaped die (9), and the arc-shaped convex blocks are matched with the arc-shaped matching grooves.
10. The forming die for preventing the stainless steel pipe from cracking and wrinkling according to claim 1, wherein the liquid filling pressure of the hydraulic filling member (12) is 0-30 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011598876.2A CN112719085B (en) | 2020-12-30 | Forming die for preventing stainless steel pipe from cracking and wrinkling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011598876.2A CN112719085B (en) | 2020-12-30 | Forming die for preventing stainless steel pipe from cracking and wrinkling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112719085A true CN112719085A (en) | 2021-04-30 |
| CN112719085B CN112719085B (en) | 2024-11-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160680A (en) * | 2021-11-10 | 2022-03-11 | 湖州金螺智能科技有限公司 | Stainless steel return bend pipe fitting forming die |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5987950A (en) * | 1997-07-18 | 1999-11-23 | Cosma International Inc. | Hydroforming of a tubular blank having an oval cross section |
| CN103658296A (en) * | 2012-09-14 | 2014-03-26 | 财团法人工业技术研究院 | Pipe fitting manufacturing method and hydraulic forming die thereof |
| CN105983606A (en) * | 2015-01-27 | 2016-10-05 | 保隆(安徽)汽车配件有限公司 | Internal high pressure-forming method for special-shaped tube |
| CN110434206A (en) * | 2019-09-02 | 2019-11-12 | 河南永福德科技股份有限公司 | Bending and molding device and forming elbow method |
| CN210358765U (en) * | 2019-07-05 | 2020-04-21 | 长春智乐机械制造有限公司 | Internal high-pressure forming die |
| CN214108531U (en) * | 2020-12-30 | 2021-09-03 | 长春智乐机械制造有限公司 | Forming die for preventing stainless steel pipe from cracking and wrinkling |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5987950A (en) * | 1997-07-18 | 1999-11-23 | Cosma International Inc. | Hydroforming of a tubular blank having an oval cross section |
| CN103658296A (en) * | 2012-09-14 | 2014-03-26 | 财团法人工业技术研究院 | Pipe fitting manufacturing method and hydraulic forming die thereof |
| CN105983606A (en) * | 2015-01-27 | 2016-10-05 | 保隆(安徽)汽车配件有限公司 | Internal high pressure-forming method for special-shaped tube |
| CN210358765U (en) * | 2019-07-05 | 2020-04-21 | 长春智乐机械制造有限公司 | Internal high-pressure forming die |
| CN110434206A (en) * | 2019-09-02 | 2019-11-12 | 河南永福德科技股份有限公司 | Bending and molding device and forming elbow method |
| CN214108531U (en) * | 2020-12-30 | 2021-09-03 | 长春智乐机械制造有限公司 | Forming die for preventing stainless steel pipe from cracking and wrinkling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160680A (en) * | 2021-11-10 | 2022-03-11 | 湖州金螺智能科技有限公司 | Stainless steel return bend pipe fitting forming die |
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