CN111774468B - Be used for Shan Kaka press pipe fashioned mould - Google Patents
Be used for Shan Kaka press pipe fashioned mould Download PDFInfo
- Publication number
- CN111774468B CN111774468B CN202010735129.2A CN202010735129A CN111774468B CN 111774468 B CN111774468 B CN 111774468B CN 202010735129 A CN202010735129 A CN 202010735129A CN 111774468 B CN111774468 B CN 111774468B
- Authority
- CN
- China
- Prior art keywords
- section
- kaka
- shan
- die
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000000465 moulding Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 6
- 239000002184 metal Substances 0.000 description 15
- 238000007493 shaping process Methods 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 9
- 230000010349 pulsation Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000750004 Nestor meridionalis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—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
-
- 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
-
- 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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to the technical field of internal high-pressure forming dies, and discloses a die for Shan Kaka pipe pressing forming, which comprises: the fixed die is provided with at least one first cavity matched with the outer surface of the Shan Kaka pressing pipe, and two sides of the first cavity are open sides; the movable die is movable relative to the top end of the fixed die and is provided with a second cavity matched with the first cavity, and two sides of the second cavity are open sides; the punch heads are arranged in pairs, two punch heads are respectively connected to two opposite sides of the fixed die and the movable die in a sliding mode, one punch head is provided with a through hole allowing liquid medium to circulate, the contour edge of the punch head is provided with a flaring section and a high-pressure sealing section, and the flaring section is used for enlarging the inner diameter of the tube blank. The invention provides a die for molding Shan Kaka press pipes, which aims to achieve the purposes of few processing procedures of Shan Kaka press pipes and stable quality of molded Shan Kaka press pipes.
Description
Technical Field
The invention relates to the technical field of internal high-pressure forming dies, in particular to a die for Shan Kaka pipe pressing forming.
Background
At present, the molding of Shan Kaka pressing pipes is mainly realized in a mechanical molding mode, and equipment required by the molding is mainly provided with a pipe end molding machine and a cold heading machine, and the pipe end molding machine and the cold heading machine are combined with a die to process a pipe blank in a single-head or double-head mode. The existing processing mode for the double-clamping pressing pipe is water expansion molding, and the water expansion molding has the advantage of one-step molding, but as the outer side of the sealing pipe body of the Shan Kaka pressing pipe is not connected with a straight line segment, the existing Shan Kaka pressing pipe cannot be processed in the processing mode of the water expansion molding; therefore, the molding process of Shan Kaka pipe pressing mainly comprises primary flaring, secondary flaring, pipe end upsetting and shaping, wherein when the processing mode of Shan Kaka pipe pressing is single-head processing, the quality of the molded Shan Kaka pipe pressing is stable, but the molding process of Shan Kaka pipe pressing needs eight times; when Shan Kaka is processed by double heads, the molding efficiency of Shan Kaka is high, but the quality of Shan Kaka is unstable.
Disclosure of Invention
The invention aims to solve the problems that: the invention provides a die for molding Shan Kaka press pipes, which aims to achieve the purposes of few processing procedures of Shan Kaka press pipes and stable quality of molded Shan Kaka press pipes.
In order to achieve the above object, the present invention provides a die for Shan Kaka press forming, which is adapted to process a pipe blank to form a single-clip press pipe, the Shan Kaka press pipe having two oppositely disposed sealing pipe bodies, comprising:
The fixed die is provided with at least one first cavity matched with the outer surface of the Shan Kaka pressing pipe, and two sides of the first cavity are open sides;
The movable die is movable relative to the top end of the fixed die and is provided with a second cavity matched with the first cavity, and two sides of the second cavity are open sides;
The punches are arranged in pairs, the two punches are respectively connected to two opposite sides of the fixed die and the movable die in a sliding manner, one punch is provided with a perforation allowing liquid medium to circulate, the contour edge of the punch is provided with a flaring section and a high-pressure sealing section, and the flaring section is used for enlarging the inner diameter of the tube blank;
The fixed die and the movable die comprise a first connecting section and a second connecting section which are sequentially arranged from outside to inside, the second connecting section corresponds to the sealing tube body, and one side, connected with the first connecting section, of the second connecting section is set to be a first side; when the first cavity and the second cavity are matched to form a cavity for molding the Shan Kaka pipe, the interval between the first connecting section of the fixed die and the first connecting section of the movable die is equal to the outer diameter of the high-pressure sealing section, and the interval between the first side of the fixed die and the first side of the movable die is larger than the inner diameter of the outermost side of the sealing pipe body.
In some embodiments of the present application, the Shan Kaka press pipe further has a connecting pipe body and two plugging pipe bodies, two sides of the plugging pipe body are respectively connected with one side of the connecting pipe body and the sealing pipe body, the fixed mold and the movable mold each further include two third connecting sections and a fourth connecting section, and the second connecting section, the third connecting section and the fourth connecting section are respectively corresponding to the sealing pipe body, the plugging pipe body and the connecting pipe body;
the second connecting section further comprises a second side which is opposite to the first side, two sides of the fourth connecting section are respectively connected with one sides of the two third connecting sections, and the other side of the third connecting section is connected with the second side of the second connecting section.
In some embodiments of the application, the flared section is disposed obliquely and the smallest diameter of the flared section is smaller than the diameter of the tube blank and the largest diameter of the flared section is larger than the diameter of the tube blank.
In some embodiments of the present application, the profile edge of the punch further includes a low-pressure sealing section, the flaring section, the low-pressure sealing section and the high-pressure sealing section are sequentially connected end to end, the flaring section is connected with one side of the low-pressure sealing section, the flaring section extends outwards in an inclined manner towards the low-pressure sealing section, and the diameter of the flaring section gradually increases in a direction approaching the low-pressure sealing section;
And a gap between the low-pressure sealing section and the third connecting section is larger than the thickness of the tube blank.
In some embodiments of the application, the sum of the lengths of the flaring segment and the low pressure sealing segment along the axial direction of the punch is equal to the sum of the lengths of the second connecting segment and the third connecting segment along the axial direction of the punch.
In some embodiments of the present application, two sides of the fourth connecting section are respectively in smooth transition with one sides of the two third connecting sections.
In some embodiments of the application, the third connecting section and the fourth connecting section are rounded off.
The embodiment of the invention provides a die for Shan Kaka pipe pressing, which has the beneficial effects that compared with the prior art:
The flaring section is arranged to flare the pipe blank, and in the flaring process of the pipe blank by the flaring section, the inner wall of the pipe blank subjected to flaring is abutted against the periphery of the punch, so that a medium-low pressure metal hard sealing surface is formed by the inner wall of the pipe blank subjected to flaring and the periphery of the punch, meanwhile, medium-pressure liquid medium with constant pressure and constant pulsation frequency enters a sealing cavity surrounded by the medium-low pressure metal hard sealing surface through the perforation of the pipe blank, and finally, two ends of the pipe blank are respectively abutted against two ultrahigh pressure sealing sections, so that the initial medium-pressure pre-expansion of the pipe blank is realized;
After the initial medium-pressure pre-expansion is carried out on the pipe blank, the inner wall of the pipe blank and the high-pressure sealing section of the punch form a high-pressure metal hard sealing surface, so that a liquid medium with constant pulsation frequency from medium pressure to high pressure is continuously injected into the pipe blank, a soft male die is formed by the liquid medium, and simultaneously, the two punches move in opposite directions, and the medium-high pressure expansion of the pipe blank is realized under the combined action of the soft male die and the punch; when the high-pressure sealing section of the punch moves to be attached to the first side, the liquid medium is in a pressure maintaining state, the liquid medium performs high-pressure shaping on the pipe blank, and the pipe blank is completely bent to the peripheral wall of the first cavity, the peripheral wall of the second cavity and the peripheral wall of the high-pressure sealing section, so that the high-pressure shaping of the pipe blank is realized;
therefore, the die for Shan Kaka pipe pressing has the advantages of low forming pressure, one-step forming, one-die multi-cavity and small die locking force of forming equipment, and can form a single-clamp pipe pressing through water expansion forming, so that the Shan Kaka pipe pressing has the advantage of stable quality.
Drawings
Fig. 1 is a schematic structural diagram of a die for Shan Kaka press pipe forming according to an embodiment of the present invention.
Fig. 2 is an exploded view of a die for Shan Kaka press forming in accordance with an embodiment of the present invention.
Fig. 3 is a schematic structural view of a stationary mold according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a movable mold according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a punch according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of the die and the tube blank under the forming method step S4 according to the embodiment of the present invention.
Fig. 7 is a schematic diagram of the structure of fig. 6 at a.
Fig. 8 is a schematic structural view of the die and the tube blank under the forming method step S5 according to the embodiment of the present invention.
Fig. 9 is a schematic diagram of the structure of fig. 8 at B.
Fig. 10 is a schematic structural view of the Shan Kaka press pipe after molding.
In the figure, 1, a fixed mold; 11. a first connection section; 12. a second connection section; 121. a first side; 122. a second side; 13. a third connecting section; 14. a fourth connecting section; 2. a first cavity; 3. a movable mold; 31. a first connection section; 32. a second connection section; 321. a first side; 322. a second side; 33. a third connecting section; 34. a fourth connecting section; 4. a second cavity; 5. a punch; 51. a flaring section; 52. a low pressure seal section; 53. a high pressure seal section; 6. perforating; 7. a tube blank; 8. shan Kaka pressing the tube; 81. a connection pipe body; 82. an insertion pipe body; 83. sealing the tube body.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1 to 10, a preferred embodiment of the present invention provides a die for Shan Kaka press forming, which is adapted to process a tube blank 7 to form a single-clip press 8, and the Shan Kaka press 8 has two oppositely disposed sealing tube bodies 83, which includes:
the fixed mold 1, the fixed mold 1 is provided with at least one first cavity 2 which is matched with the outer surface of the Shan Kaka pressing pipe 8, and two sides of the first cavity 2 are open sides;
the movable die 3 is movable relative to the top end of the fixed die 1, the movable die 3 is provided with a second cavity 4 matched with the first cavity 2, and two sides of the second cavity 4 are open sides;
the punches 5 are arranged in pairs, the two punches 5 are respectively connected to two opposite sides of the fixed die 1 and the movable die 2 in a sliding manner, one punch 5 is provided with a perforation 6 allowing a liquid medium to circulate, the contour edge of the punch 5 is provided with a flaring section 51 and a high-pressure sealing section 53, and the flaring section 51 is used for enlarging the inner diameter of the tube blank 7;
the fixed die 1 and the movable die 3 comprise a first connecting section and a second connecting section which are sequentially arranged from outside to inside, the second connecting section corresponds to the sealing pipe 83, and one side, connected with the first connecting section, of the second connecting section is the first side; when the first cavity 2 and the second cavity 4 are mated to form a cavity for Shan Kaka press pipe molding, the interval between the first connecting section of the fixed mold 1 and the first connecting section of the movable mold 3 is equal to the outer diameter of the high-pressure seal section 53, and the interval between the first side of the fixed mold 1 and the first side of the movable mold 3 is larger than the inner diameter of the outermost side of the seal pipe 83.
Based on the arrangement, the flaring section 51 is arranged, the flaring section 51 flares the tube blank 7, the inner wall of the tube blank 7 subjected to flaring is abutted against the periphery of the punch 5 in the process of flaring the tube blank 7 by the flaring section 51, so that a medium-low pressure metal hard sealing surface is formed by the inner wall of the tube blank 7 subjected to flaring and the periphery of the punch 5, meanwhile, medium-pressure liquid medium with constant pressure and constant pulsation frequency enters a sealing cavity surrounded by the medium-low pressure metal hard sealing surface through the perforation 6 of the tube blank 7, and finally, the two ends of the tube blank are respectively abutted against the two ultrahigh pressure sealing sections 53, so that the initial medium-pressure pre-expansion of the tube blank 7 is realized;
Because the interval between the first side of the fixed die 1 and the first side of the movable die 3 is larger than the inner diameter of the outermost side of the sealed pipe body 83 when the first die cavity 2 and the second die cavity 4 are matched to form a die cavity for Shan Kaka pipe molding, when the pipe blank 7 is subjected to high-pressure shaping, the pipe blank 7 and the high-pressure sealing sections 53 form high-pressure metal hard sealing surfaces, specifically, after the pipe blank 7 is subjected to initial medium-pressure pre-expansion, two ends of the pipe blank 7 are respectively abutted against the high-pressure sealing sections 53 of the two punches 5, the inner wall of the pipe blank 7 and the high-pressure sealing sections 53 of the punches 5 form high-pressure metal hard sealing surfaces, so that liquid medium with constant pulsation frequency from medium pressure to high pressure is continuously injected into the pipe blank 7, and simultaneously, the two punches 5 move in opposite directions, and the medium-high pressure expansion of the pipe blank 7 is realized under the combined action of the soft punch 5; when the high-pressure sealing section 53 of the punch 5 moves to be attached to the first side, the liquid medium is in a pressure maintaining state, the liquid medium carries out high-pressure shaping on the tube blank 7, and the tube blank 7 is completely bent to the peripheral wall of the first cavity 2, the peripheral wall of the second cavity 4 and the peripheral wall of the high-pressure sealing section 53, so that the high-pressure shaping of the tube blank 7 is realized;
Therefore, the die for Shan Kaka pressing the pipe 8 has the advantages of low forming pressure, one-step forming, one-die multi-cavity and small die locking force of forming equipment, and can form the single-clamp pressing pipe 8 through water expansion forming, so that the Shan Kaka pressing pipe 8 has the advantage of stable quality.
In some embodiments of the present invention, as shown in fig. 6 to 9, the Shan Kaka press pipe 8 further has a connecting pipe body 81 and two inserting pipe bodies 82, two sides of the inserting pipe body 82 are respectively connected with one side of the connecting pipe body 81 and the sealing pipe body 83, each of the fixed mold 1 and the movable mold 3 further includes two third connecting sections and a fourth connecting section, the second connecting sections, the third connecting sections and the fourth connecting sections respectively correspond to the sealing pipe body 83, the inserting pipe body 82 and the connecting pipe body 81, wherein the fixed mold 1 includes a first connecting section 11, a second connecting section 12, a third connecting section 13 and a fourth connecting section 14, and the second connecting section 12 includes a first side 121 and a second side 122; the movable mould 3 comprises a first connecting section 31, a second connecting section 32, a third connecting section 33 and a fourth connecting section 34, and the second connecting section 32 comprises a first side 321 and a second side 322;
The second connecting section further comprises a second side which is opposite to the first side, two sides of the fourth connecting section are respectively connected with one sides of the two third connecting sections, and the other sides of the third connecting sections are connected with the second sides of the second connecting sections. Firstly, it should be noted that, when the first cavity 2 and the second cavity 4 cooperate to form a cavity for Shan Kaka press forming, the outer diameter of the tube blank 7 is equal to the gap between the two fourth connecting sections; therefore, the second connecting section, the third connecting section and the fourth connecting section are respectively arranged corresponding to the sealing pipe body 83, the inserting pipe body 82 and the connecting pipe body 81, so that the molding of the Shan Kaka pressing pipe 8 is facilitated.
In some embodiments of the present invention, as shown in fig. 5 to 9, the profile edge of the punch 5 further includes a low pressure sealing section 52, the flaring section 51, the low pressure sealing section 52 and the high pressure sealing section 53 are connected end to end in sequence, the flaring section 51 is connected with one side of the low pressure sealing section 52, and the flaring section 51 extends obliquely outwards towards the low pressure sealing section 52, the diameter of the flaring section 51 increases gradually in the direction approaching the low pressure sealing section 52, the minimum diameter of the flaring section 51 is smaller than the diameter of the pipe blank 7, and the maximum diameter of the flaring section 51 is larger than the diameter of the pipe blank 7;
the gap between the low pressure seal section 52 and the third connecting section is greater than the thickness of the tube blank 7. Thereby, the diameter of the flaring section 51 is smaller than the diameter of the tube blank 7, so that the punch 5 can conveniently enter the inner cavity of the tube blank 7; the diameter of the part of the flaring section 51 is larger than that of the tube blank 7, so that the flaring of the tube blank 7 is facilitated;
when the inner wall of the tube blank 7 is tightly attached to the low-pressure sealing section 52, a middle-low pressure metal hard sealing surface is formed between the tube blank 7 and the low-pressure sealing section 52; when the inner wall of the tube blank 7 is separated from the low-pressure sealing section 52, the die and the liquid medium of the embodiment of the invention cooperate to perform high-pressure expansion and high-pressure shaping on the tube blank 7.
In some embodiments of the present invention, as shown in fig. 6 to 9, the sum of the lengths of the flare section 51 and the low-pressure seal section 52 in the axial direction of the punch 5 is equal to the sum of the lengths of the second connecting section and the third connecting section in the axial direction of the punch 5. Thus, compared with the prior art that the sum of the lengths of the flaring section 51 and the low-pressure sealing section 52 is far smaller than the sum of the lengths of the second connecting section and the third connecting section, when the punch 5 of the embodiment of the invention is used for flaring the pipe blank 7, the flaring section 51 flares the part of the pipe blank 7 corresponding to the sealing pipe body 83 and the plugging pipe body 82, so that the first flaring of the sealing pipe body 83 and the plugging pipe body 82 is completed.
In some embodiments of the present invention, as shown in fig. 5, two sides of the fourth connection section are smoothly transitioned to one side of the two third connection sections, respectively. The connection between the third connection section and the fourth connection section can be better matched with the connection between the connection pipe body 81 and the plug-in pipe body 82 because of smooth transition between the connection pipe body 81 and the plug-in pipe body 82; in addition, the forming process of the connecting pipe body 81 and the inserting pipe body 82 is more convenient, and the resistance of the connecting pipe body 81 and the inserting pipe body 82 in the forming process is reduced. Specifically, a rounded transition is provided between the third connecting section and the fourth connecting section.
The embodiment of the invention also provides a molding method for molding the single-card clamping and pressing pipe, which comprises the following steps:
S1, positioning a tube blank 7: positioning the tube blank 7 in the first cavity 2 of the fixed die 1;
S2, die assembly: the movable die 3 descends until the end face of the movable die 3 is attached to the end face of the fixed die 1;
S3, exhausting: liquid medium enters the inner cavity of the tube blank 7 from the perforation 6 of the punch 5, the inner cavity of the tube blank 7 is filled with liquid, and meanwhile, the gas in the tube blank 7 is discharged;
s4, flaring, establishing a medium-low pressure metal hard sealing surface and initial medium-pressure pre-expansion: the two punches 5 move in opposite directions, and the two punches 5 enter the inner cavity of the tube blank 7; simultaneously, medium-pressure liquid medium with constant pressure and constant pulsation frequency is injected into the inner cavity of the tube blank 7 until the high-pressure sealing sections 53 of the two punches 5 are abutted against the two sides of the tube blank 7, and then the flaring of the tube blank 7, the establishment of a medium-low pressure metal hard sealing surface and the initial medium-pressure pre-expansion are completed;
S5, establishing a high-pressure metal hard sealing surface, and performing medium-pressure high-pressure expansion and high-pressure shaping: the two punches 5 continue to move in opposite directions; meanwhile, liquid medium with constant pulsation frequency from medium pressure to high pressure is injected into the inner cavity of the tube blank 7, the liquid medium forms a soft male die, and the tube blank 7 and the high-pressure sealing section 53 form a high-pressure metal hard surface so as to perform high-pressure expansion on the tube blank 7; when the high-pressure sealing section 53 is attached to the second side, the two punches 5 are in a static state, and the liquid medium is in a pressure maintaining state until the tube blank 7 is completely bent to the peripheral wall of the first cavity 2, the peripheral wall of the second cavity 4 and the peripheral wall of the high-pressure sealing section 53 so as to perform high-pressure shaping on the tube blank 7;
S6, pressure relief: the liquid medium generator for injecting liquid medium into the Shan Kaka pressing pipe 8 is used for pressure relief, and the power cylinder for pushing the punch 5 to move is used for pressure relief;
s7, die sinking: the movable mould 3 moves upwards, and the Shan Kaka pressed pipe 8 after molding is taken out.
In step S4, medium-pressure liquid medium with constant pressure and constant pulsation frequency is injected into the inner cavity of the tube blank 7, and the medium-pressure liquid medium provides supporting force for the tube blank 7 to prevent the tube blank 7 from sinking inwards;
Wherein the medium pressure liquid medium in step S4 does not exceed the initial yield force of the material, so that the tube blank 7 is not deformed by the pressure and pulsation frequency of the liquid medium.
In the step S5, experiments prove that the Shan Kaka pressure pipe 8 can realize high-pressure shaping under the action of a liquid medium with the pressure of 50Mpa-60Mpa, so that the medium-high pressure pulsation liquid filling shaping of the Shan Kaka pressure pipe 8 is realized.
In summary, the die for Shan Kaka pipe pressing and forming provided by the embodiment of the invention has the following advantages:
(1) A low-pressure metal hard sealing surface is formed between the low-pressure sealing section 52 of the punch 5 and the tube blank 7, and a high-pressure metal hard sealing surface is formed between the high-pressure sealing section 53 of the punch 5 and the tube blank 7, so that a good sealing effect is achieved on a liquid medium, and the Shan Kaka pressure tube 8 can be molded by a water expansion molding technology, and therefore, the molded Shan Kaka pressure tube 8 is good in quality;
(2) Compared with the clamping and pressing pipe required in the prior art, the die disclosed by the embodiment of the invention is matched with medium-high pressure liquid medium to process the pipe blank 7, so that the forming pressure is low, the die locking force is greatly reduced, the stability of the Shan Kaka pressing pipe 8 in the forming process is ensured, the die has the advantage of multiple cavities, the forming time of the Shan Kaka pressing pipe 8 can be shortened, and the working efficiency is improved;
(3) Multiple working procedures are not needed, and the molding is carried out once, so that the working efficiency is improved;
(4) The sealing surface adopts a metal hard sealing principle, so that the performance of the Shan Kaka pipe pressing 8 is more reliable, and the surface damage to the Shan Kaka pipe pressing 8 is reduced;
(5) According to the embodiment of the invention, the die is matched with medium-high pressure liquid medium to process the pipe blank 7, the size of the outer contour of the punch 5 can ensure that the inner diameter of the Shan Kaka pipe pressing 8 meets the design requirement, and the fixed die 1 and the movable die 3 can ensure that the outer diameter of the Shan Kaka pipe pressing 8 meets the design requirement, so that the dimensional tolerance of the Shan Kaka pipe pressing is controllable.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (4)
1. A die for Shan Kaka press forming adapted to process a tube blank into a single-clip press, said Shan Kaka press having two oppositely disposed sealed tubes, comprising:
The fixed die is provided with at least one first cavity matched with the outer surface of the Shan Kaka pressing pipe, and two sides of the first cavity are open sides;
The movable die is movable relative to the top end of the fixed die and is provided with a second cavity matched with the first cavity, and two sides of the second cavity are open sides;
The punches are arranged in pairs, the two punches are respectively connected to two opposite sides of the fixed die and the movable die in a sliding manner, one punch is provided with a perforation allowing liquid medium to circulate, the contour edge of the punch is provided with a flaring section and a high-pressure sealing section, and the flaring section is used for enlarging the inner diameter of the tube blank;
The fixed die and the movable die comprise a first connecting section and a second connecting section which are sequentially arranged from outside to inside, the second connecting section corresponds to the sealing tube body, and one side, connected with the first connecting section, of the second connecting section is set to be a first side; when the first cavity and the second cavity are matched to form a cavity for molding the Shan Kaka pipe, the interval between the first connecting section of the fixed die and the first connecting section of the movable die is equal to the outer diameter of the high-pressure sealing section, and the interval between the first side of the fixed die and the first side of the movable die is larger than the inner diameter of the outermost side of the sealing pipe body;
The Shan Kaka pipe pressing device is characterized by further comprising a connecting pipe body and two inserting pipe bodies, wherein two sides of each inserting pipe body are respectively connected with one side of the connecting pipe body and the sealing pipe body, each fixed die and each movable die further comprises two third connecting sections and four connecting sections, and the second connecting sections, the third connecting sections and the fourth connecting sections respectively correspond to the sealing pipe body, the inserting pipe bodies and the connecting pipe bodies;
the second connecting section further comprises a second side which is opposite to the first side, two sides of the fourth connecting section are respectively connected with one sides of the two third connecting sections, and the other side of the third connecting section is connected with the second side of the second connecting section;
The flaring section is obliquely arranged, the minimum diameter of the flaring section is smaller than the diameter of the tube blank, and the maximum diameter of the flaring section is larger than the diameter of the tube blank;
And two sides of the fourth connecting section are respectively in smooth transition with one sides of the two third connecting sections.
2. The die for Shan Kaka press forming a tube according to claim 1, wherein the contour edge of the punch further includes a low-pressure seal section, the flare section, the low-pressure seal section, and the high-pressure seal section are connected end to end in this order, the flare section is connected to one side of the low-pressure seal section, and the flare section extends obliquely outward toward the low-pressure seal section, and the diameter of the flare section gradually increases in a direction approaching the low-pressure seal section;
And a gap between the low-pressure sealing section and the third connecting section is larger than the thickness of the tube blank.
3. The die for Shan Kaka press forming of a tube according to claim 2, wherein the sum of lengths of the flare section and the low-pressure seal section in the axial direction of the punch is equal to the sum of lengths of the second connecting section and the third connecting section in the axial direction of the punch.
4. The die for Shan Kaka press forming of a tube of claim 1, wherein the third connecting section and the fourth connecting section are radiused in transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010735129.2A CN111774468B (en) | 2020-07-27 | 2020-07-27 | Be used for Shan Kaka press pipe fashioned mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010735129.2A CN111774468B (en) | 2020-07-27 | 2020-07-27 | Be used for Shan Kaka press pipe fashioned mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111774468A CN111774468A (en) | 2020-10-16 |
| CN111774468B true CN111774468B (en) | 2024-05-10 |
Family
ID=72766293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010735129.2A Active CN111774468B (en) | 2020-07-27 | 2020-07-27 | Be used for Shan Kaka press pipe fashioned mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111774468B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5353618A (en) * | 1989-08-24 | 1994-10-11 | Armco Steel Company, L.P. | Apparatus and method for forming a tubular frame member |
| JP2002096117A (en) * | 2000-09-18 | 2002-04-02 | Honda Motor Co Ltd | Bulging apparatus |
| EP1336439A1 (en) * | 2002-02-13 | 2003-08-20 | Schuler Hydroforming GmbH & Co. KG | Method and apparatus for producing workpieces through hydroforming |
| JP2005000951A (en) * | 2003-06-11 | 2005-01-06 | Sumitomo Metal Ind Ltd | Hydraulic bulging method and device, and bulge article |
| JP2005161402A (en) * | 2003-11-14 | 2005-06-23 | Suzuki Motor Corp | Hydroforming die and hydroforming method |
| JP2006102820A (en) * | 2005-11-24 | 2006-04-20 | Vari-Form Inc | Filling and pressurizing apparatus |
| JP2006159206A (en) * | 2004-12-02 | 2006-06-22 | Hashimoto Kinzoku Kogyo Kk | Method and apparatus for working diametrically enlarged portion of pipe |
| JP2009214156A (en) * | 2008-03-12 | 2009-09-24 | Honda Motor Co Ltd | Bulging method and bulging device |
| CN111014417A (en) * | 2019-12-26 | 2020-04-17 | 哈尔滨工大海卓智能成形科技有限公司 | Flanging type pipe liquid filling forming sealing device and method |
| CN212397772U (en) * | 2020-07-27 | 2021-01-26 | 佛山市永恒液压机械有限公司 | Die for single-clamp clamping and pressing pipe forming |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311857B (en) * | 2015-12-21 | 2017-11-07 | 青岛世冠装备科技有限公司 | A kind of swollen manufacturing process of complex section hollow member low pressure upsetting |
-
2020
- 2020-07-27 CN CN202010735129.2A patent/CN111774468B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5353618A (en) * | 1989-08-24 | 1994-10-11 | Armco Steel Company, L.P. | Apparatus and method for forming a tubular frame member |
| JP2002096117A (en) * | 2000-09-18 | 2002-04-02 | Honda Motor Co Ltd | Bulging apparatus |
| EP1336439A1 (en) * | 2002-02-13 | 2003-08-20 | Schuler Hydroforming GmbH & Co. KG | Method and apparatus for producing workpieces through hydroforming |
| JP2005000951A (en) * | 2003-06-11 | 2005-01-06 | Sumitomo Metal Ind Ltd | Hydraulic bulging method and device, and bulge article |
| JP2005161402A (en) * | 2003-11-14 | 2005-06-23 | Suzuki Motor Corp | Hydroforming die and hydroforming method |
| JP2006159206A (en) * | 2004-12-02 | 2006-06-22 | Hashimoto Kinzoku Kogyo Kk | Method and apparatus for working diametrically enlarged portion of pipe |
| JP2006102820A (en) * | 2005-11-24 | 2006-04-20 | Vari-Form Inc | Filling and pressurizing apparatus |
| JP2009214156A (en) * | 2008-03-12 | 2009-09-24 | Honda Motor Co Ltd | Bulging method and bulging device |
| CN111014417A (en) * | 2019-12-26 | 2020-04-17 | 哈尔滨工大海卓智能成形科技有限公司 | Flanging type pipe liquid filling forming sealing device and method |
| CN212397772U (en) * | 2020-07-27 | 2021-01-26 | 佛山市永恒液压机械有限公司 | Die for single-clamp clamping and pressing pipe forming |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111774468A (en) | 2020-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2524896B2 (en) | Method for manufacturing a hollow integral metal element | |
| KR20010021944A (en) | Hydroforming of a tubular blank having an oval cross section and hydroforming apparatus | |
| CN102500710B (en) | Automatic tee shaping equipment and shaping method thereof | |
| CN111974866B (en) | Be used for fashioned mould of two card pressure pipes | |
| CN212397772U (en) | Die for single-clamp clamping and pressing pipe forming | |
| CN111774468B (en) | Be used for Shan Kaka press pipe fashioned mould | |
| CN212760567U (en) | Die for forming double-clamping pressure pipe | |
| CN111974865B (en) | Clamping and pressing pipe forming equipment | |
| CN111014417B (en) | Flanging type pipe liquid filling forming sealing device and method | |
| CN210023521U (en) | Composite pipe flanging withholding joint processing equipment | |
| CN212760566U (en) | Pipe forming equipment is pressed to card | |
| CN215391878U (en) | Pipe forming punch and pipe forming equipment are pressed to card | |
| CN113369364B (en) | Method for forming pressure clamping pipe | |
| CN112108555B (en) | Clamping and pressing pipe forming method through clamping and pressing pipe equipment | |
| CN111872212B (en) | Pipe sealing method | |
| CN216606957U (en) | Pipe material reaming mechanism | |
| CN215467348U (en) | Clamping and pressing pipe forming device | |
| JPH06238380A (en) | Device for expanding diameter of pipe for heat exchanger by hydraulic pressure | |
| CN215467347U (en) | Anti-cracking double-clamping pipe pressing punch | |
| CN112676514B (en) | Cold heading module and cold heading process of special-shaped terminal | |
| CN112893595B (en) | Special die for low-pressure forming of bending axis pipe fitting | |
| CN218425056U (en) | Composite forming die for reducing joint combined pipe fitting | |
| CN217528865U (en) | M-shaped clamping and pressing pipe fitting blank forming die | |
| CN213469191U (en) | Metal pipe bulge loop processingequipment | |
| CN213915659U (en) | Internal high-pressure forming pushing head device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |