CN110548799A - ultrahigh-pressure water expansion and vacuum auxiliary forming device and method for clamp-press type pipe fitting - Google Patents
ultrahigh-pressure water expansion and vacuum auxiliary forming device and method for clamp-press type pipe fitting Download PDFInfo
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- CN110548799A CN110548799A CN201910852630.4A CN201910852630A CN110548799A CN 110548799 A CN110548799 A CN 110548799A CN 201910852630 A CN201910852630 A CN 201910852630A CN 110548799 A CN110548799 A CN 110548799A
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- extrusion
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004080 punching Methods 0.000 claims abstract description 38
- 230000000149 penetrating effect Effects 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 250
- 238000001125 extrusion Methods 0.000 claims description 153
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 47
- 239000000741 silica gel Substances 0.000 claims description 47
- 229910002027 silica gel Inorganic materials 0.000 claims description 47
- 230000007246 mechanism Effects 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 17
- 238000003780 insertion Methods 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 15
- 238000005086 pumping Methods 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 7
- 238000005267 amalgamation Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 125000000524 functional group Chemical group 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 238000007493 shaping process Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
-
- 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
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
a device and a method for ultrahigh-pressure water expansion and vacuum-assisted forming of a clamping-pressing type pipe belong to the field of stainless steel clamping-pressing type thin-wall pipe processing equipment. The method is characterized in that: the forming die comprises an upper die body and a lower die body, wherein an upper die cavity is formed in the upper die body, and a lower die cavity is formed in the lower die body; after the upper and lower mould bodies are buckled relatively, the upper and lower mould cavities are enclosed to form a forming cavity; the left punching needle and the right punching needle can respectively plug the left pipe orifice and the right pipe orifice of the pipe fitting from the left end and the right end, the left punching needle is provided with an in-pipe exhaust hole, and the right punching needle is provided with a high-pressure water injection hole; an in-pipe exhaust electromagnetic valve is arranged on the in-pipe exhaust hole; the high-pressure water injection hole is connected with a high-pressure water source through a high-pressure water injection valve and a high-pressure water guide pipe; a vacuumizing channel penetrating through the upper die body is arranged in the upper die cavity, and a die cavity exhaust electromagnetic valve is arranged at the outer end of the die cavity exhaust hole penetrating through the lower die body. The device can ensure that the working water pressure is in a proper range and improve the forming quality and the operating efficiency of products.
Description
Technical Field
the invention belongs to the field of stainless steel clamping and pressing type thin-wall pipe fitting machining equipment, and particularly relates to a stainless steel pipe fitting forming device.
Background
Under the existing technical conditions, the stainless steel clamping and pressing type thin-wall pipe fitting manufactured by high-pressure water internal expansion forming has the following advantages: the water expansion forming method has high speed and high quality and the minimum scratch area; but also has disadvantages: the water pressure is high during operation, the requirement on a pipeline valve of equipment bearing high pressure is very high, 2-3 fittings such as a high-pressure water pipe one-way valve high-pressure seal need to be replaced every quarter, the product percent of pass is 95% left and right wandering all the time, in addition, the processing and forming quality aiming at the product with the curved surface radius smaller than 2 mm is not high, secondary rolling repair is needed, and the error of the outer diameter of the product can not be improved within 0.4 mm.
In view of this, the applicant designs the device, which can ensure the working water pressure in a proper range and improve the forming quality and the working efficiency of the product.
disclosure of Invention
the invention aims to solve the technical problem of providing a device and a method for ultrahigh-pressure water expansion and vacuum auxiliary forming of a clamp-press type pipe fitting, which can ensure that the working water pressure is in a proper range and improve the forming quality and the operation efficiency of a product.
In order to solve the technical problems, the technical scheme of the invention is as follows: the invention relates to a device for ultrahigh-pressure water expansion and vacuum auxiliary forming of a clamp-press type pipe fitting, which is characterized in that: comprises a forming die, a left punching needle and a right punching needle; the forming die comprises an upper die body and a lower die body, wherein an upper die cavity is formed in the upper die body, and a lower die cavity is formed in the lower die body; after the upper die body and the lower die body are buckled oppositely, the upper die cavity and the lower die cavity are enclosed to form a forming cavity, and a left pipe fitting insertion opening and a right pipe fitting insertion opening are respectively arranged on two sides of the forming cavity; the left punching needle and the right punching needle can respectively plug the left pipe orifice and the right pipe orifice of the pipe fitting from the left end and the right end, the left punching needle is provided with an in-pipe exhaust hole, and the right punching needle is provided with a high-pressure water injection hole; an in-pipe exhaust electromagnetic valve is arranged on the in-pipe exhaust hole; the high-pressure water injection hole is connected with a high-pressure water source through a high-pressure water injection valve and a high-pressure water guide pipe;
A cavity vent hole penetrating through the lower die body is formed in the lower die cavity, and a cavity vent electromagnetic valve is installed at the outer end of the cavity vent hole penetrating through the lower die body; a vacuumizing channel penetrating through the upper die body is arranged in the upper die cavity, a vacuumizing electromagnetic valve is installed at the position where the vacuumizing channel penetrates through the upper die body, and then a vacuum storage tank and a vacuum pump are sequentially connected through a vacuum pipeline;
The forming die further comprises a sealing mechanism, and the sealing mechanism can seal gaps between the left pipe fitting insertion opening and the pipe fitting insertion opening and between the right pipe fitting insertion opening and the pipe fitting from the left side and the right side.
preferably, an upper die changing cavity and a lower die changing cavity are respectively arranged in the upper die body and the lower die body, an upper forming module and a lower forming module which can be disassembled are respectively arranged in the upper die changing cavity and the lower die changing cavity, the number of the upper forming module and the lower forming module is more than one,
the inner side surfaces of the upper forming module and the lower forming module are respectively provided with an upper die parting cavity and a lower die parting cavity with complex curved surfaces or small-radius curved surfaces, and when the upper die body and the lower die body are buckled together, the upper die parting cavity and the lower die parting cavity of each upper forming module and each lower forming module enclose a forming cavity; an upper vacuum-pumping channel penetrating through the upper forming module and the upper die body is formed in each upper die cavity, and a lower vacuum-pumping channel penetrating through the lower forming module and the lower die body is formed in each lower die cavity; each upper vacuumizing channel and each lower vacuumizing channel are sequentially connected with a vacuum storage tank and a vacuum pump through vacuum pipelines.
preferably, the sealing mechanism comprises a left sealing end cover and a right sealing end cover, the left sealing end cover and the right sealing end cover are respectively provided with a left pipe body sleeve hole and a right pipe body sleeve hole, and the peripheral surfaces of the left sealing end cover and the right sealing end cover are provided with external threads; a left sealing caulking groove and a right sealing caulking groove are respectively formed in the left side and the right side of the upper die body and the lower die body, and internal threads are formed in the inner circumferential surfaces of the left sealing caulking groove and the right sealing caulking groove; when the upper and lower die bodies are buckled together, the left and right sealing end cover lantern rings can be sleeved on the pipe fitting from the left and right sides and are respectively arranged in the left and right sealing caulking grooves in a threaded connection mode; the periphery of the sleeve holes of the left and right tube bodies on the inner side surfaces of the left and right sealing end covers is respectively provided with an annular sealing groove with an L-shaped cross section, and an annular silica gel sealing ring is arranged in the annular sealing groove.
Preferably, the sealing mechanism comprises an upper left sealing end cover, an upper right sealing end cover, a lower left sealing end cover and a lower right sealing end cover, the upper left sealing end cover and the upper right sealing end cover are respectively installed on the upper parts of the left end face and the right end face of the upper die body through an upper left hinge and an upper right hinge, and the lower left sealing end cover and the lower right sealing end cover are respectively installed on the upper parts of the left end face and the right end face of the lower die body through a lower left hinge and a lower right hinge;
Semi-annular sealing grooves are formed in the inner side surfaces of the upper left sealing end cover, the upper right sealing end cover, the lower left sealing end cover and the lower right sealing end cover, and semi-annular silica gel sealing rings are arranged in the semi-annular sealing grooves; all set up left side silica gel seal strake on the relative amalgamation of last left side end cover and lower left side end cover or faying surface, all set up right side silica gel seal strake on the relative amalgamation of last right side end cover and lower right side end cover or the faying surface.
Preferably, an upper left bolt seat and a lower left bolt seat are respectively arranged on the outer sides of the upper left sealing end cover and the lower left sealing end cover, an upper left bolt hole and a lower left bolt hole are respectively formed in the upper left bolt seat and the lower left bolt seat, and a left bolt column is inserted into the upper left bolt hole and the lower left bolt hole in a penetrating manner; and an upper right bolt seat and a lower right bolt seat are respectively arranged on the outer sides of the upper right sealing end cover and the lower right sealing end cover, an upper right bolt hole and a lower right bolt hole are respectively formed in the upper right bolt seat and the lower right bolt seat, and a right bolt column is inserted into the upper right bolt hole and the lower right bolt hole in a penetrating manner.
Preferably, the sealing mechanism comprises a left sealing function group and a right sealing function group;
The left sealing function group comprises a left end cover and a left core ring, the left end surfaces of the upper die body and the lower die body are respectively provided with an upper left extrusion groove and a lower left extrusion groove of a semi-annular body, and the upper left extrusion groove and the lower left extrusion groove are spliced to form a circular ring-shaped left extrusion groove coaxial with the socket of the left pipe fitting; the left core ring comprises a left annular flange and a left core body, a left outer pipe fitting socket is formed in the middle of the left core body, the left outer pipe fitting socket and the left pipe fitting socket are coaxially arranged in an equal diameter mode, the left core ring is sleeved on the pipe fitting from the left side, the left core body is inserted into the left extrusion groove, and the left core ring is installed on the outer end faces of the left sides of the upper and lower die bodies which are buckled together through a left annular flange and a left flange installation bolt; a left annular sealing ring mounting plate is arranged between the left core body and the left extrusion groove, and a conical self-lubricating left silica gel sealing ring is fixed on the right end surface of the left annular sealing ring mounting plate; a conical left side sealing extrusion gap is formed at the bottom of the left side extrusion groove; the middle part of the left end cover is provided with a left sleeve hole, and the left end cover is sleeved on the pipe fitting through the left sleeve hole and is arranged on the left side of the left core ring; at least four left extrusion push rods are arranged on the right side of the left end cover and around the periphery of the left sleeve hole, left extrusion push holes with the same number as the left extrusion push rods are correspondingly formed in the left core body, and each left extrusion push rod is inserted into the left extrusion push hole; when the left end cover is extruded from left to right, the left side extrusion pushing hole can push the left side annular sealing ring, and then the right end of the left side silica gel sealing ring is inserted into the left side sealing extrusion gap;
The right sealing function group comprises a right end cover and a right core ring, an upper right extrusion groove and a lower right extrusion groove of a semi-annular body are respectively formed in the right end faces of the upper die body and the lower die body, and the upper right extrusion groove and the lower right extrusion groove are spliced to form a circular right extrusion groove which is coaxial with the socket of the right pipe fitting; the right core ring comprises a right annular flange and a right core body, a right outer pipe fitting socket is formed in the middle of the right core body, the right outer pipe fitting socket and the right pipe fitting socket are coaxially arranged in an equal diameter mode, the right core ring is sleeved on the pipe fitting from the right side, the right core body is inserted into the right extrusion groove, and the right core ring is installed on the outer end faces of the right sides of the upper and lower die bodies which are buckled together through a right annular flange and a right flange installation bolt; a right annular sealing ring mounting plate is arranged between the right core body and the right extrusion groove, and a conical self-lubricating right silica gel sealing ring is fixed on the right end surface of the right annular sealing ring mounting plate; a conical right side sealing extrusion gap is formed at the bottom of the right side extrusion groove; the middle part of the right end cover is provided with a right sleeve hole, and the right end cover is sleeved on the pipe fitting through the right sleeve hole and is arranged on the right side of the right core ring; at least four right extrusion push rods are arranged on the left side of the right end cover and around the periphery of the right sleeve hole, right extrusion push holes with the same number as the right extrusion push rods are correspondingly formed in the right core body, and each right extrusion push rod is inserted into the right extrusion push hole; when the right end cover is extruded from the right side to the right side, the right side extrusion pushing hole can push the right side annular sealing ring, and then the right end of the right side silica gel sealing ring is inserted into the right side sealing extrusion gap.
Preferably, the device also comprises a left-side extrusion power device and a right-side extrusion power device;
the left extrusion power device comprises a left extrusion driving cylinder, a left extrusion driving motor is arranged at the upper part of the upper die body or the lower part of the lower die body, and a telescopic rod of the left extrusion driving cylinder is connected with the left end cover through a mounting lock catch and can drive the left end cover to move left and right;
the right side extrusion power device comprises a right side extrusion driving cylinder, a right side extrusion driving motor is installed on the upper portion of the upper die body or the lower portion of the lower die body, and a telescopic rod of the right side extrusion driving cylinder is connected with the right end cover through an installation lock catch and can drive the right end cover to move left and right.
Preferably, still include left side extension spring and the right side extension spring that resets, the left end face of left core and left side ring type seal ring is connected respectively at the both ends of left side extension spring that resets, the right end face of right core and right side ring type seal ring is connected respectively at the both ends of right side extension spring that resets.
The invention relates to a molding method of a device for ultrahigh-pressure water expansion and vacuum assisted molding of a clamp-press type pipe fitting, which is characterized by comprising the following steps of:
(1) Separating the upper die body and the lower die body, replacing the upper forming module and the lower forming module corresponding to the forming size according to the requirement, and installing the upper forming module and the lower forming module in an upper die changing cavity and a lower die changing cavity of the upper die body and the lower die body;
(2) Placing the pipe fitting on the lower die body, and enabling the left end and the right end of the pipe fitting to be respectively arranged in the left pipe fitting jack and the right pipe fitting jack, so that the belt forming part of the pipe fitting is completely positioned in the forming cavity;
(3) buckling the upper die body and the lower die body together, and installing sealing mechanisms at two ends of the buckled upper die body and lower die body;
(4) Inserting a left punching needle and a right punching needle into the left end and the right end of the pipe fitting respectively and completely sealing the pipe orifice of the pipe fitting;
(5) filling water into the pipe fitting through a high-pressure water injection hole of the right punching needle, exhausting gas in the pipe fitting through an exhaust hole on the left punching needle in the early stage of injection, and starting to inject high-pressure water after exhausting; meanwhile, opening a cavity exhaust electromagnetic valve, and closing the cavity exhaust electromagnetic valve after exhausting air in the molding cavity; and starting a vacuum pump, pumping the inside of the forming cavity into a negative pressure state sequentially through the upper vacuumizing channel, the lower vacuumizing channel and the vacuum pipeline until the pipe fitting is expanded in the forming cavity under the action of negative pressure and high-pressure water until the pipe fitting is completely attached to the forming cavity, and finishing the precise forming processing of the complex curved surface or the small pipe diameter of the pipe fitting.
preferably, the installing the sealing mechanism in the step (3) includes the steps of:
a. firstly, respectively sleeving a left annular sealing ring mounting plate and a right annular sealing ring mounting plate at the left end and the right end of a pipe fitting, and enabling the small-diameter ends of the left silica gel sealing ring and the right silica gel sealing ring to be oppositely arranged;
b. sleeving a left core ring on the pipe fitting from the left side, inserting the left core body into the left extrusion groove, and installing the left core ring on the outer end faces of the left sides of the upper and lower die bodies which are buckled together through a left annular flange and a left flange installation bolt; the right core ring is sleeved on the pipe fitting from the right side, the right core body is inserted into the right extrusion groove, and the right core ring is arranged on the outer end faces of the right sides of the upper die body and the lower die body which are buckled together through a right annular flange and a right flange mounting bolt;
c. The left end cover is sleeved on the pipe fitting through the left sleeve hole and is arranged on the left side of the left core ring; each left extrusion push rod is inserted into the left extrusion push hole;
the right end cover is sleeved on the pipe fitting through the right sleeve hole and is arranged on the right side of the right core ring; each right side extrusion push rod is inserted into the right side extrusion push hole;
d. starting the left side extrusion driving cylinder, extruding the left end cover from left to right, pushing the left side annular sealing ring by the left side extrusion pushing hole, and inserting the left end of the left side silica gel sealing ring into the left side sealing extrusion gap;
The right side is started to extrude the driving cylinder, the right end cover is extruded from right to left, the right side extruding and pushing hole can push the right side annular sealing ring, and then the right end of the right side silica gel sealing ring is inserted into the right side sealing and extruding gap.
compared with the prior art, the invention has the beneficial effects that:
1. The invention can ensure that the working water pressure is in a proper range and improve the molding quality and the operating efficiency of the product.
2. the product external diameter deviation that adopts forming mode DN50 among the prior art fluctuates between 0.4 millimeter, and through the water rise with the use of vacuum auxiliary forming device, the external diameter error control is within 0.1 millimeter, and product quality stability improves by a wide margin.
3. the method reduces the high-pressure water pressure by 30 MPa on the premise of ensuring the molding quality, prolongs the service life of accessories such as a die, a left punching needle, a right punching needle, each electromagnetic valve, a 150 MPa high-pressure hose and the like by more than two times, reduces the overhaul rate, improves the production efficiency and obviously reduces the product cost. The method has simple structure and flexible and convenient use, and is suitable for popularization in the industry.
4. The applicant designs and uses a mechanical sealing structure with reasonable structure in the device, and does not need to buy expensive high-pressure sealing elements, so that the pressure tolerance is stronger, the use cost of the device is greatly reduced, and the sealing effect is better.
drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic structural view of the present invention (second embodiment: left and right hermetic end caps are not completely mounted);
FIG. 4 is a schematic structural view of a right seal end cap;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a schematic structural view of the present invention (second embodiment: left and right end caps installed);
FIG. 7 is a schematic structural view of the present invention (embodiment III);
FIG. 8 is a schematic view of the lower left end closure;
FIG. 9 is a schematic structural view of the present invention (embodiment four);
FIG. 10 is a schematic view of the structure of the left side seal functional group;
The labels in the figure are: 1. feeding a mold body; 2. an upper mold cavity; 3. a vacuum channel is pumped; 4. vacuumizing an electromagnetic valve; 5. a vacuum line; 6. a vacuum storage tank; 7. a right punching needle; 8. high-pressure water injection holes; 9. a high-pressure water injection valve; 10. a lower die body; 11. a lower die cavity; 12. an exhaust hole in the pipe; 13. an exhaust electromagnetic valve in the pipe; 14. punching the needle leftwards; 15. a pipe fitting; 16. a vacuum pump; 17. a cavity vent hole; 18. a cavity exhaust electromagnetic valve; 19. a left seal end cap; 20. a left sealing caulking groove; 21. an upper parting die cavity; 22. an upper vacuum pumping channel; 23. an upper forming module; 24. a right sealing caulking groove; 26. A right seal end cap; 27. a lower forming module; 28. a lower evacuation channel; 29. a lower parting die cavity; 30. an external thread; 31. an annular silica gel seal ring; 32. a right pipe body trepanning; 33. a right sealing caulking groove; 34. an upper left hinge; 35. an upper left sealing end cover; 36. a left side latch post; 37. an upper left bolt seat; 38. a lower left bolt seat; 39. a lower left end cap; 40. a lower left hinge; 41. a lower right hinge; 42. a lower right sealing end cap; 43. a lower right bolt seat; 44. an upper right bolt seat; 45. a right side latch post; 46. an upper right sealing end cover; 47. an upper right hinge; 48. sealing the edge strips with silica gel on the left side; 49. a semi-annular silica gel seal ring; 50. a left end cap; 51. a push rod is extruded in the left side; 52. the left side is sleeved with a pipe hole; 53. a left core; 54. a left reset tension spring; 55. a self-lubricating left silica gel seal ring; 56. a self-lubricating right silica gel sealing ring; 57. a right reset tension spring; 58. a right core body; 59. the right side is sleeved with a pipe hole; 60. a push rod is extruded at the right side; 61. a right end cap; 62. a bolt is installed on the right flange; 63. a right annular flange; 64. installing a lock catch; 65. extruding into the groove from the upper right; 66. the right side is extruded into a driving cylinder; 67. the left side is extruded into a driving cylinder; 68. extruding into the groove from the upper left; 69. installing a lock catch; 70. a left annular flange; 71. mounting a bolt on the left flange; 72. the conical left side is sealed and extruded into the gap; 73. a left annular seal ring mounting plate; 74. right side ring seal mounting panel.
Detailed Description
The invention is described in further detail below with reference to the figures and reference numerals.
As shown in fig. 1 and 2, the device for ultrahigh-pressure water expansion and vacuum assisted molding of a clamp-press type pipe fitting comprises a molding die, a left punching needle and a right punching needle; the forming die comprises an upper die body and a lower die body, wherein an upper die cavity is formed in the upper die body, and a lower die cavity is formed in the lower die body; after the upper die body and the lower die body are buckled oppositely, the upper die cavity and the lower die cavity are enclosed to form a forming cavity, and a left pipe fitting insertion opening and a right pipe fitting insertion opening are respectively arranged on two sides of the forming cavity; the left punching needle and the right punching needle can respectively plug the left pipe orifice and the right pipe orifice of the pipe fitting from the left end and the right end, the left punching needle is provided with an in-pipe exhaust hole, and the right punching needle is provided with a high-pressure water injection hole; an in-pipe exhaust electromagnetic valve is arranged on the in-pipe exhaust hole; the high-pressure water injection hole is connected with a high-pressure water source through a high-pressure water injection valve and a high-pressure water guide pipe.
a cavity vent hole penetrating through the lower die body is formed in the lower die cavity, and a cavity vent electromagnetic valve is installed at the outer end of the cavity vent hole penetrating through the lower die body; and a vacuumizing channel penetrating through the upper die body is arranged in the upper die cavity (the vacuumizing channel needs to be arranged at the position with the minimum R arc and the position with the maximum diameter of the forming cavity), the vacuumizing channel penetrates out of the upper die body, a vacuumizing electromagnetic valve is installed, and then a vacuum storage tank and a vacuum pump are sequentially connected through a vacuum pipeline.
the forming die further comprises a sealing mechanism, and the sealing mechanism can seal gaps between the left pipe fitting insertion opening and the pipe fitting insertion opening and between the right pipe fitting insertion opening and the pipe fitting from the left side and the right side.
the using method of the invention comprises the following steps:
(1) separating the upper die body and the lower die body, replacing the upper forming module and the lower forming module corresponding to the forming size according to the requirement, and installing the upper forming module and the lower forming module in an upper die changing cavity and a lower die changing cavity of the upper die body and the lower die body;
(2) placing the pipe fitting on the lower die body, and enabling the left end and the right end of the pipe fitting to be respectively arranged in the left pipe fitting jack and the right pipe fitting jack, so that the belt forming part of the pipe fitting is completely positioned in the forming cavity;
(3) buckling the upper die body and the lower die body together, and installing sealing mechanisms at two ends of the buckled upper die body and lower die body;
(4) Inserting a left punching needle and a right punching needle into the left end and the right end of the pipe fitting respectively and completely sealing the pipe orifice of the pipe fitting;
(5) filling water into the pipe fitting through a high-pressure water injection hole of the right punching needle, exhausting gas in the pipe fitting through an exhaust hole on the left punching needle in the early stage of injection, and starting to inject high-pressure water after exhausting; meanwhile, opening a cavity exhaust electromagnetic valve, and closing the cavity exhaust electromagnetic valve after exhausting air in the molding cavity; and starting a vacuum pump, pumping the inside of the forming cavity into a negative pressure state sequentially through the upper vacuumizing channel, the lower vacuumizing channel and the vacuum pipeline until the pipe fitting is expanded in the forming cavity under the action of negative pressure and high-pressure water until the pipe fitting is completely attached to the forming cavity, and finishing the precise forming processing of the complex curved surface or the small pipe diameter of the pipe fitting.
Example one
In this embodiment, an upper mold changing cavity and a lower mold changing cavity are respectively formed in the upper mold body and the lower mold body, an upper molding module and a lower molding module which can be detached are respectively installed in the upper mold changing cavity and the lower mold changing cavity, and the number of the upper molding module and the lower molding module is more than one.
the inner side surfaces of the upper forming module and the lower forming module are respectively provided with an upper die parting cavity and a lower die parting cavity with complex curved surfaces or small-radius curved surfaces, and when the upper die body and the lower die body are buckled together, the upper die parting cavity and the lower die parting cavity of each upper forming module and each lower forming module enclose a forming cavity; an upper vacuum-pumping channel penetrating through the upper forming module and the upper die body is formed in each upper die cavity, and a lower vacuum-pumping channel penetrating through the lower forming module and the lower die body is formed in each lower die cavity; each upper vacuumizing channel and each lower vacuumizing channel are sequentially connected with a vacuum storage tank and a vacuum pump through vacuum pipelines.
the structure of the embodiment has the following advantages: the person of processing can be according to the fashioned shape of pipe fitting, and the shaping cavity is enclosed to close by a plurality of last shaping modules and lower shaping module and forms, so not only is favorable to the subsection processing and the installation of profiled surface to each shaping module all sets up by the evacuation passageway, especially can design the shaping module alone to complicated shape face and small radius radian, and carry out the negative pressure suction operation alone to narrow position, be favorable to the promotion of the shaping quality of pipe fitting outer wall, and effectively improve the finished product qualification rate.
The upper die changing cavity and the lower die changing cavity can be designed to be hemispherical or cubic, and each upper forming module and each lower forming module can be embedded into the upper die changing cavity and the lower die changing cavity respectively in a magnetic attraction or splicing combination mode.
the rest of the structural arrangement and the use mode of the embodiment are the same as those of the first embodiment, and are not described again.
Example two
as shown in fig. 3 and 6, in this embodiment, the sealing mechanism includes a left sealing end cap and a right sealing end cap, the left sealing end cap and the right sealing end cap are respectively provided with a left tube body sleeve hole and a right tube body sleeve hole, and the outer peripheral surfaces of the left sealing end cap and the right sealing end cap are provided with external threads. As shown in fig. 4 and 5, left and right sealing caulking grooves are respectively formed on the left and right sides of the upper mold body and the lower mold body, and internal threads are formed on the inner circumferential surfaces of the left and right sealing caulking grooves; when the upper and lower die bodies are buckled together, the left and right sealing end cover lantern rings can be sleeved on the pipe fitting from the left and right sides and are respectively arranged in the left and right sealing caulking grooves in a threaded connection mode; the periphery of the sleeve holes of the left and right tube bodies on the inner side surfaces of the left and right sealing end covers are respectively provided with an annular sealing groove with an L-shaped cross section, and an annular silica gel sealing ring is arranged in the annular sealing groove.
When the sealing mechanism described in this embodiment is used, the sealing mechanism can be installed according to the following steps:
after the upper die body and the lower die body are buckled together, the left sealing end cover and the right sealing end cover are sleeved from the left end and the right end of the pipe fitting, the aperture of the sleeve hole of the left sealing end body and the aperture of the sleeve hole of the right sealing end body are the same as or slightly larger than the outer diameter of the pipe fitting, the left sealing end cover and the right sealing end cover are installed and fixed in the left sealing caulking groove and the right sealing caulking groove through the matching of the external thread and the internal thread, and the annular silica gel sealing ring is extruded by the sealing end covers and the sealing caulking grooves to deform and extend towards the direction of the pipe fitting until the. The structure is simple and reasonable in design and easy to install and use.
the rest of the structural arrangement and the use mode of the embodiment are the same as those of the first embodiment, and are not described again.
EXAMPLE III
As shown in fig. 7 and 8, the sealing mechanism includes an upper left sealing end cover, an upper right sealing end cover, a lower left sealing end cover and a lower right sealing end cover, the upper left sealing end cover and the upper right sealing end cover are respectively installed on the upper portions of the left and right end faces of the upper die body through an upper left hinge and an upper right hinge, and the lower left sealing end cover and the lower right sealing end cover are respectively installed on the upper portions of the left and right end faces of the lower die body through a lower left hinge and a lower right hinge.
Semi-annular sealing grooves are formed in the inner side surfaces of the upper left sealing end cover, the upper right sealing end cover, the lower left sealing end cover and the lower right sealing end cover, and semi-annular silica gel sealing rings are arranged in the semi-annular sealing grooves; all set up left side silica gel seal strake on the relative amalgamation of last left side end cover and lower left side end cover or faying surface, all set up right side silica gel seal strake on the relative amalgamation of last right side end cover and lower right side end cover or the faying surface.
an upper left bolt seat and a lower left bolt seat are respectively arranged on the outer sides of the upper left sealing end cover and the lower left sealing end cover, an upper left bolt hole and a lower left bolt hole are respectively formed in the upper left bolt seat and the lower left bolt seat, and a left bolt column is inserted into the upper left bolt hole and the lower left bolt hole in a penetrating manner; and an upper right bolt seat and a lower right bolt seat are respectively arranged on the outer sides of the upper right sealing end cover and the lower right sealing end cover, an upper right bolt hole and a lower right bolt hole are respectively formed in the upper right bolt seat and the lower right bolt seat, and a right bolt column is inserted into the upper right bolt hole and the lower right bolt hole in a penetrating manner.
When the present embodiment is used, the installation and sealing can be performed according to the following steps:
After the upper and lower die bodies are fastened, the upper left sealing end cover and the lower left sealing end cover on the left side are fastened oppositely, and then the left side bolt seat and the lower left bolt seat are inserted through the left side bolt column; the upper right sealing end cover and the lower right sealing end cover on the right side are buckled and then inserted into the upper right bolt seat and the lower right bolt seat through the right bolt columns. At the moment, the annular silica gel sealing ring can seal a gap between the sealing end cover and the pipe fitting, the left silica gel sealing edge strip can seal a splicing gap between the upper left sealing end cover and the lower left sealing end cover, and the right silica gel sealing edge strip can seal a splicing gap between the upper right sealing end cover and the lower right sealing end cover. The sealing structure described in this embodiment is simple and convenient to install and fix when in use, can complete all operations without special skilled workers, and has stronger universality.
The rest of the structural arrangement and the use mode of the embodiment are the same as those of the first embodiment or the second embodiment, and are not described again.
example four
The sealing mechanism comprises a left sealing function group and a right sealing function group.
the left sealing function group comprises a left end cover and a left core ring, the left end surfaces of the upper die body and the lower die body are respectively provided with an upper left extrusion groove and a lower left extrusion groove of a semi-annular body, and the upper left extrusion groove and the lower left extrusion groove are spliced to form a circular ring-shaped left extrusion groove coaxial with the socket of the left pipe fitting; the left core ring comprises a left annular flange and a left core body, a left outer pipe fitting socket is formed in the middle of the left core body, the left outer pipe fitting socket and the left pipe fitting socket are coaxially arranged in an equal diameter mode, the left core ring is sleeved on the pipe fitting from the left side, the left core body is inserted into the left extrusion groove, and the left core ring is installed on the outer end faces of the left sides of the upper and lower die bodies which are buckled together through a left annular flange and a left flange installation bolt; a left annular sealing ring mounting plate is arranged between the left core body and the left extrusion groove, and a conical self-lubricating left silica gel sealing ring is fixed on the right end surface of the left annular sealing ring mounting plate; a conical left side sealing extrusion gap is formed at the bottom of the left side extrusion groove; the middle part of the left end cover is provided with a left sleeve hole, and the left end cover is sleeved on the pipe fitting through the left sleeve hole and is arranged on the left side of the left core ring; at least four left extrusion push rods are arranged on the right side of the left end cover and around the periphery of the left sleeve hole, left extrusion push holes with the same number as the left extrusion push rods are correspondingly formed in the left core body, and each left extrusion push rod is inserted into the left extrusion push hole; when extruding the left end cover from left to right, the left side extrusion pushing hole can push the left side ring-shaped sealing ring, and then the right end of the left side silica gel sealing ring is inserted into the left side sealing extrusion gap.
The right sealing function group comprises a right end cover and a right core ring, an upper right extrusion groove and a lower right extrusion groove of a semi-annular body are respectively formed in the right end faces of the upper die body and the lower die body, and the upper right extrusion groove and the lower right extrusion groove are spliced to form a circular right extrusion groove which is coaxial with the socket of the right pipe fitting; the right core ring comprises a right annular flange and a right core body, a right outer pipe fitting socket is formed in the middle of the right core body, the right outer pipe fitting socket and the right pipe fitting socket are coaxially arranged in an equal diameter mode, the right core ring is sleeved on the pipe fitting from the right side, the right core body is inserted into the right extrusion groove, and the right core ring is installed on the outer end faces of the right sides of the upper and lower die bodies which are buckled together through a right annular flange and a right flange installation bolt; a right annular sealing ring mounting plate is arranged between the right core body and the right extrusion groove, and a conical self-lubricating right silica gel sealing ring is fixed on the right end surface of the right annular sealing ring mounting plate; a conical right side sealing extrusion gap is formed at the bottom of the right side extrusion groove; the middle part of the right end cover is provided with a right sleeve hole, and the right end cover is sleeved on the pipe fitting through the right sleeve hole and is arranged on the right side of the right core ring; at least four right extrusion push rods are arranged on the left side of the right end cover and around the periphery of the right sleeve hole, right extrusion push holes with the same number as the right extrusion push rods are correspondingly formed in the right core body, and each right extrusion push rod is inserted into the right extrusion push hole; when the right end cover is extruded from the right side to the right side, the right side extrusion pushing hole can push the right side annular sealing ring, and then the right end of the right side silica gel sealing ring is inserted into the right side sealing extrusion gap.
the device also comprises a left extrusion power device and a right extrusion power device.
the left side extrusion power device comprises a left side extrusion driving cylinder, a left side extrusion driving motor is installed on the upper portion of the upper die body or the lower portion of the lower die body, and a telescopic rod of the left side extrusion driving cylinder is connected with the left end cover through an installation lock catch and can drive the left end cover to move left and right.
The right side extrusion power device comprises a right side extrusion driving cylinder, a right side extrusion driving motor is installed on the upper portion of the upper die body or the lower portion of the lower die body, and a telescopic rod of the right side extrusion driving cylinder is connected with the right end cover through an installation lock catch and can drive the right end cover to move left and right.
Still include left side extension spring and right side extension spring that resets, the left end face of left core and left side ring type seal ring is connected respectively at the both ends of left side extension spring that resets, the right end face of right core and right side ring type seal ring is connected respectively at the both ends of right side extension spring that resets.
the installation sealing mechanism comprises the following steps:
a. Firstly, respectively sleeving a left annular sealing ring mounting plate and a right annular sealing ring mounting plate at the left end and the right end of a pipe fitting, and enabling the small-diameter ends of the left silica gel sealing ring and the right silica gel sealing ring to be oppositely arranged;
b. Sleeving a left core ring on the pipe fitting from the left side, inserting the left core body into the left extrusion groove, and installing the left core ring on the outer end faces of the left sides of the upper and lower die bodies which are buckled together through a left annular flange and a left flange installation bolt; the right core ring is sleeved on the pipe fitting from the right side, the right core body is inserted into the right extrusion groove, and the right core ring is arranged on the outer end faces of the right sides of the upper die body and the lower die body which are buckled together through a right annular flange and a right flange mounting bolt;
c. The left end cover is sleeved on the pipe fitting through the left sleeve hole and is arranged on the left side of the left core ring; each left extrusion push rod is inserted into the left extrusion push hole;
The right end cover is sleeved on the pipe fitting through the right sleeve hole and is arranged on the right side of the right core ring; each right side extrusion push rod is inserted into the right side extrusion push hole;
d. starting the left side extrusion driving cylinder, extruding the left end cover from left to right, pushing the left side annular sealing ring by the left side extrusion pushing hole, and inserting the left end of the left side silica gel sealing ring into the left side sealing extrusion gap;
the right side is started to extrude the driving cylinder, the right end cover is extruded from right to left, the right side extruding and pushing hole can push the right side annular sealing ring, and then the right end of the right side silica gel sealing ring is inserted into the right side sealing and extruding gap.
Sealing mechanism possess following advantage in the use, drive actuating cylinder through the left and right side crowded and crowd into left and right side silica gel sealing washer respectively, accomplish fixed back, when treating to the vacuum pumping operation of shaping cavity, left and right side silica gel sealing washer can further paste tight left and right side sealed crowded clearance under the negative pressure effect, can not respond to the negative pressure too big and lead to sealed inefficacy, sealed insurance degree is higher, and is reliable and durable, can save the expense that senior seal valve brought, and reduction in production cost.
The rest of the structural arrangement and the use mode of the embodiment are the same as those of the first embodiment or the second embodiment, and are not described again.
the above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and any person skilled in the art may make any combination, change or modification of the above-described embodiments using the technical content disclosed in the above description. This patent installation hasp can be for lock catches commonly used such as bolt formula, solenoid valve etc. are ripe prior art, no longer give unnecessary details its structure and use control method. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention, without departing from the technical solution of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. The ultrahigh pressure water expansion and vacuum auxiliary forming device for the clamp-press type pipe fitting is characterized in that: comprises a forming die, a left punching needle and a right punching needle; the forming die comprises an upper die body and a lower die body, wherein an upper die cavity is formed in the upper die body, and a lower die cavity is formed in the lower die body; after the upper die body and the lower die body are buckled oppositely, the upper die cavity and the lower die cavity are enclosed to form a forming cavity, and a left pipe fitting insertion opening and a right pipe fitting insertion opening are respectively arranged on two sides of the forming cavity; the left punching needle and the right punching needle can respectively plug the left pipe orifice and the right pipe orifice of the pipe fitting from the left end and the right end, the left punching needle is provided with an in-pipe exhaust hole, and the right punching needle is provided with a high-pressure water injection hole; an in-pipe exhaust electromagnetic valve is arranged on the in-pipe exhaust hole; the high-pressure water injection hole is connected with a high-pressure water source through a high-pressure water injection valve and a high-pressure water guide pipe;
a cavity vent hole penetrating through the lower die body is formed in the lower die cavity, and a cavity vent electromagnetic valve is installed at the outer end of the cavity vent hole penetrating through the lower die body; a vacuumizing channel penetrating through the upper die body is arranged in the upper die cavity, a vacuumizing electromagnetic valve is installed at the position where the vacuumizing channel penetrates through the upper die body, and then a vacuum storage tank and a vacuum pump are sequentially connected through a vacuum pipeline;
The forming die further comprises a sealing mechanism, and the sealing mechanism can seal gaps between the left pipe fitting insertion opening and the pipe fitting insertion opening and between the right pipe fitting insertion opening and the pipe fitting from the left side and the right side.
2. The ultrahigh-pressure water-swelling and vacuum-assisted forming device for the clamp-press type pipe fitting according to claim 1, wherein the ultrahigh-pressure water-swelling and vacuum-assisted forming device comprises: an upper die changing cavity and a lower die changing cavity are respectively arranged in the upper die body and the lower die body, an upper forming module and a lower forming module which can be disassembled are respectively arranged in the upper die changing cavity and the lower die changing cavity, the number of the upper forming module and the lower forming module is more than one,
The inner side surfaces of the upper forming module and the lower forming module are respectively provided with an upper die parting cavity and a lower die parting cavity with complex curved surfaces or small-radius curved surfaces, and when the upper die body and the lower die body are buckled together, the upper die parting cavity and the lower die parting cavity of each upper forming module and each lower forming module enclose a forming cavity; an upper vacuum-pumping channel penetrating through the upper forming module and the upper die body is formed in each upper die cavity, and a lower vacuum-pumping channel penetrating through the lower forming module and the lower die body is formed in each lower die cavity; each upper vacuumizing channel and each lower vacuumizing channel are sequentially connected with a vacuum storage tank and a vacuum pump through vacuum pipelines.
3. The ultrahigh-pressure water-swelling and vacuum-assisted forming device for the clamp-press type pipe fitting according to claim 2, wherein the ultrahigh-pressure water-swelling and vacuum-assisted forming device comprises: the sealing mechanism comprises a left sealing end cover and a right sealing end cover, wherein left and right pipe body sleeve holes are respectively formed in the left and right sealing end covers, and external threads are formed on the peripheral surfaces of the left and right sealing end covers; a left sealing caulking groove and a right sealing caulking groove are respectively formed in the left side and the right side of the upper die body and the lower die body, and internal threads are formed in the inner circumferential surfaces of the left sealing caulking groove and the right sealing caulking groove; when the upper and lower die bodies are buckled together, the left and right sealing end cover lantern rings can be sleeved on the pipe fitting from the left and right sides and are respectively arranged in the left and right sealing caulking grooves in a threaded connection mode; the periphery of the sleeve holes of the left and right tube bodies on the inner side surfaces of the left and right sealing end covers is respectively provided with an annular sealing groove with an L-shaped cross section, and an annular silica gel sealing ring is arranged in the annular sealing groove.
4. The ultrahigh-pressure water-swelling and vacuum-assisted forming device for the clamp-press type pipe fitting according to claim 2, wherein the ultrahigh-pressure water-swelling and vacuum-assisted forming device comprises: the sealing mechanism comprises an upper left sealing end cover, an upper right sealing end cover, a lower left sealing end cover and a lower right sealing end cover, the upper left sealing end cover and the upper right sealing end cover are respectively installed on the upper parts of the left end face and the right end face of the upper die body through an upper left hinge and an upper right hinge, and the lower left sealing end cover and the lower right sealing end cover are respectively installed on the upper parts of the left end face and the right end face of the lower die body through a lower left hinge and a lower right hinge;
Semi-annular sealing grooves are formed in the inner side surfaces of the upper left sealing end cover, the upper right sealing end cover, the lower left sealing end cover and the lower right sealing end cover, and semi-annular silica gel sealing rings are arranged in the semi-annular sealing grooves; all set up left side silica gel seal strake on the relative amalgamation of last left side end cover and lower left side end cover or faying surface, all set up right side silica gel seal strake on the relative amalgamation of last right side end cover and lower right side end cover or the faying surface.
5. The ultrahigh-pressure water-swelling and vacuum-assisted forming device for the clamp-press type pipe fitting according to claim 4, wherein the ultrahigh-pressure water-swelling and vacuum-assisted forming device comprises: an upper left bolt seat and a lower left bolt seat are respectively arranged on the outer sides of the upper left sealing end cover and the lower left sealing end cover, an upper left bolt hole and a lower left bolt hole are respectively formed in the upper left bolt seat and the lower left bolt seat, and a left bolt column is inserted into the upper left bolt hole and the lower left bolt hole in a penetrating manner; and an upper right bolt seat and a lower right bolt seat are respectively arranged on the outer sides of the upper right sealing end cover and the lower right sealing end cover, an upper right bolt hole and a lower right bolt hole are respectively formed in the upper right bolt seat and the lower right bolt seat, and a right bolt column is inserted into the upper right bolt hole and the lower right bolt hole in a penetrating manner.
6. The ultrahigh-pressure water-swelling and vacuum-assisted forming device for the clamp-press type pipe fitting according to claim 2, wherein the sealing mechanism comprises a left sealing functional group and a right sealing functional group;
the left sealing function group comprises a left end cover and a left core ring, the left end surfaces of the upper die body and the lower die body are respectively provided with an upper left extrusion groove and a lower left extrusion groove of a semi-annular body, and the upper left extrusion groove and the lower left extrusion groove are spliced to form a circular ring-shaped left extrusion groove coaxial with the socket of the left pipe fitting; the left core ring comprises a left annular flange and a left core body, a left outer pipe fitting socket is formed in the middle of the left core body, the left outer pipe fitting socket and the left pipe fitting socket are coaxially arranged in an equal diameter mode, the left core ring is sleeved on the pipe fitting from the left side, the left core body is inserted into the left extrusion groove, and the left core ring is installed on the outer end faces of the left sides of the upper and lower die bodies which are buckled together through a left annular flange and a left flange installation bolt; a left annular sealing ring mounting plate is arranged between the left core body and the left extrusion groove, and a conical self-lubricating left silica gel sealing ring is fixed on the right end surface of the left annular sealing ring mounting plate; a conical left side sealing extrusion gap is formed at the bottom of the left side extrusion groove; the middle part of the left end cover is provided with a left sleeve hole, and the left end cover is sleeved on the pipe fitting through the left sleeve hole and is arranged on the left side of the left core ring; at least four left extrusion push rods are arranged on the right side of the left end cover and around the periphery of the left sleeve hole, left extrusion push holes with the same number as the left extrusion push rods are correspondingly formed in the left core body, and each left extrusion push rod is inserted into the left extrusion push hole; when the left end cover is extruded from left to right, the left side extrusion pushing hole can push the left side annular sealing ring, and then the right end of the left side silica gel sealing ring is inserted into the left side sealing extrusion gap;
The right sealing function group comprises a right end cover and a right core ring, an upper right extrusion groove and a lower right extrusion groove of a semi-annular body are respectively formed in the right end faces of the upper die body and the lower die body, and the upper right extrusion groove and the lower right extrusion groove are spliced to form a circular right extrusion groove which is coaxial with the socket of the right pipe fitting; the right core ring comprises a right annular flange and a right core body, a right outer pipe fitting socket is formed in the middle of the right core body, the right outer pipe fitting socket and the right pipe fitting socket are coaxially arranged in an equal diameter mode, the right core ring is sleeved on the pipe fitting from the right side, the right core body is inserted into the right extrusion groove, and the right core ring is installed on the outer end faces of the right sides of the upper and lower die bodies which are buckled together through a right annular flange and a right flange installation bolt; a right annular sealing ring mounting plate is arranged between the right core body and the right extrusion groove, and a conical self-lubricating right silica gel sealing ring is fixed on the right end surface of the right annular sealing ring mounting plate; a conical right side sealing extrusion gap is formed at the bottom of the right side extrusion groove; the middle part of the right end cover is provided with a right sleeve hole, and the right end cover is sleeved on the pipe fitting through the right sleeve hole and is arranged on the right side of the right core ring; at least four right extrusion push rods are arranged on the left side of the right end cover and around the periphery of the right sleeve hole, right extrusion push holes with the same number as the right extrusion push rods are correspondingly formed in the right core body, and each right extrusion push rod is inserted into the right extrusion push hole; when the right end cover is extruded from the right side to the right side, the right side extrusion pushing hole can push the right side annular sealing ring, and then the right end of the right side silica gel sealing ring is inserted into the right side sealing extrusion gap.
7. The ultrahigh-pressure water-swelling and vacuum-assisted forming device for the clamp-press type pipe fitting according to claim 6, wherein the ultrahigh-pressure water-swelling and vacuum-assisted forming device comprises: the device also comprises a left extrusion power device and a right extrusion power device;
The left extrusion power device comprises a left extrusion driving cylinder, a left extrusion driving motor is arranged at the upper part of the upper die body or the lower part of the lower die body, and a telescopic rod of the left extrusion driving cylinder is connected with the left end cover through a mounting lock catch and can drive the left end cover to move left and right;
the right side extrusion power device comprises a right side extrusion driving cylinder, a right side extrusion driving motor is installed on the upper portion of the upper die body or the lower portion of the lower die body, and a telescopic rod of the right side extrusion driving cylinder is connected with the right end cover through an installation lock catch and can drive the right end cover to move left and right.
8. the ultrahigh-pressure water-swelling and vacuum-assisted forming device for the clamp-press type pipe fitting according to claim 7, wherein the ultrahigh-pressure water-swelling and vacuum-assisted forming device comprises: still include left side extension spring and right side extension spring that resets, the left end face of left core and left side ring type seal ring is connected respectively at the both ends of left side extension spring that resets, the right end face of right core and right side ring type seal ring is connected respectively at the both ends of right side extension spring that resets.
9. The molding method of the ultrahigh-pressure water-swelling and vacuum-assisted molding device for the clamp-press type pipe fitting according to claim 8, characterized by comprising the following steps:
(1) Separating the upper die body and the lower die body, replacing the upper forming module and the lower forming module corresponding to the forming size according to the requirement, and installing the upper forming module and the lower forming module in an upper die changing cavity and a lower die changing cavity of the upper die body and the lower die body;
(2) Placing the pipe fitting on the lower die body, and enabling the left end and the right end of the pipe fitting to be respectively arranged in the left pipe fitting jack and the right pipe fitting jack, so that the belt forming part of the pipe fitting is completely positioned in the forming cavity;
(3) Buckling the upper die body and the lower die body together, and installing sealing mechanisms at two ends of the buckled upper die body and lower die body;
(4) inserting a left punching needle and a right punching needle into the left end and the right end of the pipe fitting respectively and completely sealing the pipe orifice of the pipe fitting;
(5) Filling water into the pipe fitting through a high-pressure water injection hole of the right punching needle, exhausting gas in the pipe fitting through an exhaust hole on the left punching needle in the early stage of injection, and starting to inject high-pressure water after exhausting; meanwhile, opening a cavity exhaust electromagnetic valve, and closing the cavity exhaust electromagnetic valve after exhausting air in the molding cavity; and starting a vacuum pump, pumping the inside of the forming cavity into a negative pressure state sequentially through the upper vacuumizing channel, the lower vacuumizing channel and the vacuum pipeline until the pipe fitting is expanded in the forming cavity under the action of negative pressure and high-pressure water until the pipe fitting is completely attached to the forming cavity, and finishing the precise forming processing of the complex curved surface or the small pipe diameter of the pipe fitting.
10. the molding method of the ultrahigh-pressure water-swelling and vacuum-assisted molding device for the clamp-press type pipe fitting according to claim 9, characterized in that: the mounting of the sealing mechanism in the step (3) comprises the steps of:
a. firstly, respectively sleeving a left annular sealing ring mounting plate and a right annular sealing ring mounting plate at the left end and the right end of a pipe fitting, and enabling the small-diameter ends of the left silica gel sealing ring and the right silica gel sealing ring to be oppositely arranged;
b. sleeving a left core ring on the pipe fitting from the left side, inserting the left core body into the left extrusion groove, and installing the left core ring on the outer end faces of the left sides of the upper and lower die bodies which are buckled together through a left annular flange and a left flange installation bolt; the right core ring is sleeved on the pipe fitting from the right side, the right core body is inserted into the right extrusion groove, and the right core ring is arranged on the outer end faces of the right sides of the upper die body and the lower die body which are buckled together through a right annular flange and a right flange mounting bolt;
c. The left end cover is sleeved on the pipe fitting through the left sleeve hole and is arranged on the left side of the left core ring; each left extrusion push rod is inserted into the left extrusion push hole;
the right end cover is sleeved on the pipe fitting through the right sleeve hole and is arranged on the right side of the right core ring; each right side extrusion push rod is inserted into the right side extrusion push hole;
d. Starting the left side extrusion driving cylinder, extruding the left end cover from left to right, pushing the left side annular sealing ring by the left side extrusion pushing hole, and inserting the left end of the left side silica gel sealing ring into the left side sealing extrusion gap;
the right side is started to extrude the driving cylinder, the right end cover is extruded from right to left, the right side extruding and pushing hole can push the right side annular sealing ring, and then the right end of the right side silica gel sealing ring is inserted into the right side sealing and extruding gap.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910852630.4A CN110548799B (en) | 2019-09-10 | 2019-09-10 | Device and method for ultrahigh-pressure water expansion and vacuum auxiliary forming of clamping and pressing type pipe fitting |
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| CN201910852630.4A CN110548799B (en) | 2019-09-10 | 2019-09-10 | Device and method for ultrahigh-pressure water expansion and vacuum auxiliary forming of clamping and pressing type pipe fitting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111250587A (en) * | 2020-03-27 | 2020-06-09 | 安徽富光生活科技有限公司 | Water rises forming die |
| CN117463866A (en) * | 2023-12-26 | 2024-01-30 | 河北龙锦管道装备有限公司 | Forming equipment for carbon steel clamping straight pipe joint |
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| CN111250587A (en) * | 2020-03-27 | 2020-06-09 | 安徽富光生活科技有限公司 | Water rises forming die |
| CN111250587B (en) * | 2020-03-27 | 2024-05-07 | 安徽富光销售有限公司 | Water expansion forming die |
| CN117463866A (en) * | 2023-12-26 | 2024-01-30 | 河北龙锦管道装备有限公司 | Forming equipment for carbon steel clamping straight pipe joint |
| CN117463866B (en) * | 2023-12-26 | 2024-03-19 | 河北龙锦管道装备有限公司 | Forming equipment for carbon steel clamping straight pipe joint |
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