CN116475304A - Pull-down type numerical control ring bulging machine - Google Patents
Pull-down type numerical control ring bulging machine Download PDFInfo
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- CN116475304A CN116475304A CN202310456345.7A CN202310456345A CN116475304A CN 116475304 A CN116475304 A CN 116475304A CN 202310456345 A CN202310456345 A CN 202310456345A CN 116475304 A CN116475304 A CN 116475304A
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- 230000007246 mechanism Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 11
- 238000005242 forging Methods 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 230000008859 change Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/16—Making other particular articles rings, e.g. barrel hoops
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a pull-down numerical control ring bulging machine, which comprises a workbench, a bulging core cone, a pull-down drive and a plurality of bulging inclined blocks, wherein a core cone avoiding hole is formed in the workbench; the bulging core cone is vertically arranged above the workbench, and the small end of the bulging core cone can penetrate through the core cone avoiding hole when descending; the bulging oblique blocks are uniformly distributed on the periphery of the bulging core cone along the circumferential direction of the ring to be bulged by taking the bulging core cone as the center; any bulging inclined block is in sliding connection with the upper surface of the workbench; one end of any bulging inclined block, which is close to the bulging core cone, is arranged to be parallel to the inclined plane of the side wall of the bulging core cone, and forms an inclined plane contact pair with the side wall of the bulging core cone; the expansion core cone comprises an expansion core cone body, wherein one end of any expansion oblique block, which is far away from the expansion core cone body, is provided with a plurality of pushing surfaces, the pushing surfaces are arranged in a multi-layer step shape from top to bottom along the axial direction of the expansion core cone body, and the pushing surfaces of different layers are used for radially pushing ring pieces to be expanded with different diameters.
Description
Technical Field
The invention relates to the field of metallurgical equipment, in particular to a pull-down numerical control ring bulging machine.
Background
The aluminum alloy ring part is a typical revolving body component in a carrier rocket body structure, has larger diameter, smaller height and larger height-diameter ratio, is mostly used as a transition ring of a liquid carrier rocket storage tank, is connected with a tank bottom, a cylinder section and a short shell through welding, can bear various action loads in the transportation, launching and flying processes, has complex stress conditions, and is a core part in the rocket body structure. The early production process of the aluminum alloy annular part is section bar roll bending and splice welding, but because of certain difference between alloy elements in a weld zone and a base metal, the abrupt change of the composition and the state of the material can cause the problems of part corrosion resistance reduction, uneven internal stress distribution, part deformation in the machining process and the like. The aluminum alloy ring piece can also adopt a free forging process, and has the defects of low forging precision, large process allowance, lower production efficiency and longer manufacturing period. The radial-axial rolling forming process (also called ring rolling or ring rolling) is an advanced precision forming technology of ring pieces, and the 5m grade 2219 aluminum alloy ring pieces manufactured by the technology are applied to new generation carrier rockets in China, but the ring pieces have the problems of welding seam cracking at the joint of a transition ring and a box body in the production experiment process due to the fact that the crystal grains are thick and uneven in size, the strength and the elongation rate are anisotropic and the like. The ring bulging process enables the ring forging to deform uniformly in a stretching deformation mode, so that the ring has more uniform roundness and structural state, the tensile strength of the ring can be remarkably improved, and the ring bulging process is widely applied to the aerospace field in China.
The existing ring bulging machine has two different structures of push-up type and pull-down type, the push-up type is mainly used for small and medium ring bulging machines, and the middle and large ring bulging machines are mainly of pull-down type multi-cylinder multi-pull rod structures. In order to overcome the technical problem, the prior art proposes some optimization methods, for example, the invention patent with the publication number of CN107971413A discloses a single master cylinder pull-down type large ring bulging machine, the equipment adopts a plunger cylinder in a flip-chip mode as a master cylinder, a central pull rod penetrates through the center of the whole master cylinder, a bulging core cone, an upper beam, a master cylinder body and a movable beam are sleeved outside the central pull rod from top to bottom in sequence, a bulging die is arranged on a workbench, and the bulging die is positioned outside the bulging core cone. The outside diameter of bulging core cone reduces from top to bottom in proper order, and the cylinder body opening is downwards, and the inside master cylinder plunger that is equipped with of cylinder body, and the master cylinder plunger cover is outside the center pull rod, and the inside annular cavity that forms of master cylinder plunger and center pull rod is equipped with the inlet port in cylinder body upper end, and master cylinder plunger upper end is equipped with the oil through hole, and the oil through hole communicates with the annular cavity of inlet port and the inside of master cylinder plunger respectively, is fixed with the underbeam on the base, is connected with the return cylinder on the underbeam, and the plunger of return cylinder is connected in the movable beam lower extreme. The invention can improve the product quality, and is mainly applicable to steel and aluminum alloy ring pieces, and the metal ring pieces are bulging outwards from inside so as to ensure that the ring pieces are regular in shape and eliminate stress non-uniformity in the prior processing such as rolling. The above-mentioned known, the existing large-scale ring bulging machine based on single-cylinder structure, although can simplify the design structure of bulging machine to a certain extent, guarantee the ring atress even, but is limited to structural optimization, lack improvement and promotion in the function, for example the above-mentioned patent of patent publication No. CN107971413A, its ring size of bulging is comparatively fixed, can only change the size of bulging ring internal diameter in extremely limited scope through increasing or reducing the lamella mould, the application size scope is little, can't satisfy the manufacturing requirement of spaceflight phi 10000mm grade AA2219 aluminum alloy ring, have the complicated and difficult to operate of dismouting process simultaneously, shortcoming such as energy consumption is huge.
Disclosure of Invention
The invention aims to provide a drop-down numerical control ring bulging machine, which can realize various changes of the inner diameter of a formed ring, and further solve the problem of small application size range of the existing drop-down numerical control ring bulging machine.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a drop-down numerical control ring bulging machine, which comprises:
the workbench is provided with a core cone avoiding hole;
the bulging core cone is vertically arranged above the workbench, the small end of the bulging core cone is close to the workbench, the large end of the bulging core cone is far away from the workbench, and the small end of the bulging core cone can pass through the core cone avoiding hole when going downwards;
the bulging oblique blocks are arranged on the upper surface of the workbench and uniformly distributed on the periphery of the bulging core cone along the circumferential direction of the ring to be bulged by taking the bulging core cone as the center; any bulging inclined block is arranged along the radial direction of the ring to be bulged, and is in sliding connection with the upper surface of the workbench; one end of any bulging inclined block, which is close to the bulging core cone, is arranged to be parallel to an inclined plane of the side wall of the bulging core cone, and an inclined plane contact pair is formed between the inclined plane and the side wall of the bulging core cone; a plurality of pushing surfaces are arranged at one end, far away from the bulging core cone, of any bulging inclined block, and are arranged in a multi-layer stepped manner from top to bottom along the axial direction of the bulging core cone, and the pushing surfaces of different layers are used for radially pushing the ring pieces to be bulged with different diameters;
and the pull-down drive is arranged below the workbench and connected with the bulging core cone so as to pull down the bulging core cone and push the bulging inclined blocks outwards along the radial direction of the ring to be bulged.
Optionally, a first pushing surface and a second pushing surface are respectively arranged at the other end of any bulging oblique block, which is far away from the bulging core cone, and the first pushing surface and the second pushing surface are arranged in a two-layer ladder shape from top to bottom along the axial direction of the bulging core cone.
Optionally, the workbench includes:
a fixed beam;
the support tray is arranged on the upper surface of the fixed beam, and the core cone avoiding holes sequentially penetrate through the support tray and the fixed beam; the bulging inclined blocks are arranged on the upper surface of the supporting tray.
Optionally, the support tray includes:
the lower support frames are arranged on the upper surfaces of the fixed beams and comprise a plurality of lower support rods which are uniformly distributed along the circumferential direction by taking the bulging core cone as a center;
the upper support frames are arranged on the lower support frames, the upper support frames comprise a plurality of upper support rods, the upper support rods are uniformly distributed along the circumferential direction by taking the bulging core cone as a center, and the upper support rods and the lower support rods are arranged in a one-to-one correspondence manner;
the upper support rod is used for supporting the ring to be expanded corresponding to the first pushing surface, and the lower support rod is used for supporting the ring to be expanded corresponding to the second pushing surface; the upper surface of any lower layer bracing piece all sets up one bulging sloping block, and any bulging sloping block all with corresponding upper layer bracing piece sliding fit.
Optionally, the device further comprises a plurality of rotating mechanisms, wherein any one of the rotating mechanisms comprises:
the rotary supporting roller bearing seat is arranged between the adjacent lower supporting frames and/or between the adjacent upper supporting rods;
the rotary supporting roller is rotatably arranged on the rotary supporting roller bearing seat and is arranged along the radial direction of the ring piece to be expanded; the rotary supporting roller is used for supporting the ring piece to be expanded;
the rotary driving device is arranged on the bearing seat of the rotary supporting roller and connected with one end of the rotary supporting roller, and the rotary driving device is used for driving the rotary supporting roller to rotate so as to drive the ring to be expanded to rotate around the expansion core cone.
Optionally, the device further comprises a plurality of reset cylinders, wherein the reset cylinders are arranged in one-to-one correspondence with the lower support rods, and any one of the reset cylinders comprises:
the reset cylinder body is arranged on the lower surface of the lower-layer supporting rod;
and one end of the reset cylinder piston rod is slidably arranged in the reset cylinder body, and the other end of the reset cylinder piston rod is connected with the bulging inclined block so as to drive the bulging inclined block to move back and reset along the radial direction of the ring to be bulged.
Optionally, a plurality of first petals and a plurality of second petals are further included, wherein,
the plurality of first clack moulds are arranged in one-to-one correspondence with the bulging inclined blocks, the inner sides of the first clack moulds are connected with the first pushing surfaces, and the outer sides of the first clack moulds are provided with first clack mould pushing cambered surfaces which can be attached to the inner wall surface of the ring to be bulged;
the second valve molds are arranged in one-to-one correspondence with the bulging inclined blocks, the inner sides of the second valve molds are connected with the second pushing surfaces, and the outer sides of the second valve molds are arranged to be second valve mold pushing cambered surfaces which can be attached to the inner wall surfaces of the ring to be bulged.
Optionally, the first valve die can enable the diameter of the ring piece to be expanded to be increased from phi 3000mm to phi 5000mm at maximum under the pushing of the first pushing surface;
the second valve die can enable the diameter of the ring piece to be expanded to be increased from phi 7000mm to phi 10000mm at maximum under the pushing of the second pushing surface.
Optionally, the pull-down driving is a pull-down master cylinder, and the pull-down master cylinder includes:
the main cylinder body is arranged below the fixed beam, and an opening of the main cylinder body faces the fixed beam; the main cylinder body is connected with the bulging core cone through a pull rod;
the bottom end of the main cylinder piston rod is slidably mounted in the main cylinder body, and the top end of the main cylinder piston rod is connected with the fixed beam.
Optionally, the hydraulic control device further comprises a return cylinder disposed outside the master cylinder body, and the hydraulic control device comprises:
a return cylinder body fixed to an outer side of the master cylinder body;
and the bottom end of the return cylinder plunger is slidably arranged in the return cylinder body, and the top end of the return cylinder plunger is connected with the fixed beam.
Compared with the prior art, the invention has the following technical effects:
the invention provides a pull-down numerical control ring bulging machine, wherein a bulging core cone passes through holes formed by encircling a plurality of bulging inclined blocks when going downwards and passes through core cone avoiding holes, force vertically downwards along the gravity direction is transmitted to the upper surface of a workbench, and force in the horizontal direction is transmitted to each pushing surface and ring members to be bulged with different diameters, so that the effect of bulging the ring members is achieved, the device can be used for bulging metal ring members with different diameters, and the problem of small application size range of the conventional pull-down ring bulging machine is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a pull-down numerical control ring bulging machine according to an embodiment of the present invention;
FIG. 2 is a schematic axial sectional view of a pull-down numerical control ring bulging machine according to an embodiment of the present invention;
FIG. 3 is a side view of a drop down numerically controlled ring expander according to an embodiment of the present disclosure;
fig. 4 is a top view of a drop down numerically controlled ring expander according to an embodiment of the present invention.
Wherein, the reference numerals are as follows: 100. a pull-down numerical control ring bulging machine;
1. a core cone avoiding hole; 2. bulging core cone; 3. bulging oblique blocks; 31. an inclined plane; 32. a first urging surface; 33. a second pushing surface; 4. a fixed beam; 5. a support tray; 51. a lower layer support frame; 511. a lower support rod; 52. an upper layer support is erected; 521. an upper layer support rod; 6. a rotation mechanism; 61. rotating the backup roll bearing block; 62. rotating the support roller; 63. rotationally driving; 7. resetting the oil cylinder; 71. resetting the cylinder body of the oil cylinder; 72. resetting a cylinder piston rod; 8. a first die; 9. a second die; 10. pulling down the master cylinder; 101. a master cylinder block; 102. a master cylinder piston rod; 103. a pull rod; 11. a return cylinder; 111. a return cylinder block; 112. a return cylinder plunger;
200. a first ring member to be expanded;
300. and a second ring member to be expanded.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a drop-down numerical control ring bulging machine, which can realize various changes of the inner diameter of a formed ring, and further solve the problem of small application size range of the existing drop-down numerical control ring bulging machine. .
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a pull-down type numerically controlled ring expander 100, which mainly includes a workbench, a core cone 2 for expanding, a pull-down drive and a plurality of expansion inclined blocks 3. Wherein, the workbench is provided with a core cone avoiding hole 1. The bulging core cone 2 is vertically arranged above the workbench, the small end of the bulging core cone 2 is close to the workbench, the large end of the bulging core cone 2 is far away from the workbench, and the small end of the bulging core cone 2 can penetrate through the core cone avoiding hole 1 when going downwards. The bulging oblique blocks 3 are arranged on the upper surface of the workbench, and are uniformly distributed on the periphery of the bulging core cone 2 along the circumferential direction of the ring to be bulged by taking the bulging core cone 2 as the center; any bulging inclined block 3 is arranged along the radial direction of the ring to be bulged, and any bulging inclined block 3 is connected with the upper surface of the workbench in a sliding manner; one end of any bulging inclined block 3, which is close to the bulging core cone 2, is provided with an inclined surface 31 parallel to the side wall of the bulging core cone 2, and forms an inclined surface 31 contact pair with the side wall of the bulging core cone 2; the end of any bulging inclined block 3, which is far away from the bulging core cone 2, is provided with a plurality of pushing surfaces which are arranged in a multi-layer ladder shape from top to bottom along the axial direction of the bulging core cone 2, and the pushing surfaces of different layers are used for radially pushing ring members to be bulged with different diameters. The pull-down drive is arranged below the workbench and is connected with the bulging core cone 2 so as to pull down the bulging core cone 2 and push a plurality of bulging inclined blocks 3 outwards along the radial direction of the ring to be bulged. When the bulging core cone 2 descends, the vertical downward force along the gravity direction is transferred to the upper surface of the workbench through holes formed by enclosing the bulging inclined blocks 3, and the horizontal force is transferred to each pushing surface and ring members to be bulged with different diameters.
In this embodiment, preferably, the other end of any bulging oblique block 3 far away from the bulging core cone 2 is provided with a first pushing surface 32 and a second pushing surface 33, and the first pushing surface 32 and the second pushing surface 33 are arranged in a stepwise manner from top to bottom along the axial direction of the bulging core cone 2 to form two poles
In this embodiment, the table includes a fixed beam 4 and a support tray 5. The support tray 5 is arranged on the upper surface of the fixed beam 4, and the core cone avoiding holes 1 sequentially penetrate through the support tray 5 and the fixed beam 4; a plurality of bulging inclined blocks 3 are arranged on the upper surface of the supporting tray 5. The supporting tray 5 mainly comprises a lower supporting frame 51 and an upper supporting frame 52, the lower supporting frame 51 is arranged on the upper surface of the fixed beam 4, the lower supporting frame 51 comprises a plurality of lower supporting rods 511, and the lower supporting rods 511 are uniformly distributed along the circumferential direction by taking the bulging core cone 2 as the center; the upper support frame 52 is arranged on the lower support frame 51, the upper support frame 52 comprises a plurality of upper support rods 521, the plurality of upper support rods 521 are uniformly distributed along the circumferential direction by taking the bulging core cone 2 as the center, and the upper support rods 521 and the lower support rods 511 are arranged in a one-to-one correspondence; wherein, the upper support rod 521 is used for supporting the ring to be expanded corresponding to the first pushing surface 32, and the lower support rod 511 is used for supporting the ring to be expanded corresponding to the second pushing surface 33; the upper surface of any lower support rod 511 is provided with an expansion oblique block 3, and any expansion oblique block 3 is in sliding fit with the corresponding upper support rod 521.
In this embodiment, a plurality of rotating mechanisms 6 are further provided, wherein any rotating mechanism 6 includes a rotating support roller bearing seat 61, a rotating support roller and a rotating drive 63, and the rotating support roller bearing seat 61 is disposed between adjacent lower support frames 51 and/or between adjacent upper support rods 521; the rotary support roller 62 is rotatably mounted on the rotary support roller bearing block 61 and is arranged in the radial direction of the ring member to be expanded; the rotary support roller 62 is used for supporting the ring to be expanded; the rotary driving device 63 is disposed on the rotary supporting roller bearing seat 61 and connected to one end of the rotary supporting roller 62, and the rotary driving device 63 is used for driving the rotary supporting roller 62 to rotate so as to drive the ring to be expanded to rotate around the expansion core cone 2. The rotating mechanism 6 is composed of the rotating support roller bearing seat 61, the rotating drive 63 and the like, the rotating mechanism 6 is preferably provided with 6 sets, the rotating support rollers 62 are respectively arranged at 60-degree equal parts, the rotating support rollers 62 can drive the ring after bulging to rotate, and the 6 rotating support rollers 62 bear the weight of the ring and guide the ring.
In this embodiment, a plurality of reset cylinders 7 are further provided, and the plurality of reset cylinders 7 are arranged in one-to-one correspondence with the plurality of lower support rods 511, wherein any one reset cylinder 7 comprises a reset cylinder body 71 and a reset cylinder piston rod 72, and the reset cylinder body 71 is arranged on the lower surface of the lower support rod 511; one end of a reset cylinder piston rod 72 is slidably arranged in the reset cylinder body 71, and the other end of the reset cylinder piston rod is connected with the bulging inclined block 3 so as to drive the bulging inclined block 3 to move back and reset along the radial direction of the ring to be bulged. The return cylinder body 71 and the return cylinder piston rod 72 can ensure that after the ring piece is expanded, the expansion inclined block 3 and the valve mould on the expansion inclined block are driven to move back inwards along the radial direction to wait for the next expansion.
In the embodiment, a plurality of first clack moulds 8 and a plurality of second clack moulds 9 are also arranged, wherein the plurality of first clack moulds 8 are arranged in one-to-one correspondence with the bulging inclined blocks 3, the inner side of each first clack mould 8 is connected with a first pushing surface 32, and the outer side of each first clack mould 8 is provided with a pushing cambered surface which can be attached to the inner wall surface of a ring to be bulged; the second clack dies 9 are arranged in one-to-one correspondence with the bulging inclined blocks 3, the inner sides of the second clack dies 9 are connected with the second pushing surfaces 33, and the outer sides of the second clack dies 9 are arranged to be pushing cambered surfaces which can be attached to the inner wall surfaces of the ring to be bulged.
In the embodiment, the diameter of the ring to be expanded can be increased from phi 3800mm to phi 4650mm at maximum by the first valve die 8 under the pushing of the first pushing surface 32; the second die 9 can increase the diameter of the ring to be expanded from phi 7000mm to phi 10000mm at maximum under the pushing of the second pushing surface 33.
In the present embodiment, the pull-down driving is preferably a pull-down master cylinder 10, the pull-down master cylinder 10 mainly includes a master cylinder body 101 and a master cylinder piston rod 102, the master cylinder body 101 is disposed below the fixed beam 4, and an opening of the master cylinder body 101 is disposed toward the fixed beam 4; the main cylinder body 101 is connected with the bulging core cone 2 through a pull rod 103; the bottom end of the master cylinder piston rod 102 is slidably mounted in the master cylinder body 101, and the top end is connected to the fixed beam 4. The outer radial direction of each bulging inclined block 3 is provided with a connecting groove for ensuring the connection with the bulging core cone 2, when hydraulic oil is introduced into the main cylinder body 101, the bulging inclined blocks 3 move radially outwards to form a bulging trend in the descending process of the bulging core cone 2, the first pushing surface 32 of each bulging inclined block 3 is firstly contacted with and tightly pushes against the inner wall of the first ring member 200 to be bulged through the first valve die 8, and as the bulging core cone 2 continues to descend, the first valve die 8 can realize bulging forming of the first ring member 200 to be bulged, and the diameter dimension change range of the first ring member 200 to be bulged is preferably phi 3000 mm-phi 5000mm, for example, the diameter dimension change range of the first ring member to be bulged is phi 3800 mm-phi 4650mm; as the expansion core cone 2 continues to move downwards, the first pushing surface 32 of the expansion inclined block 3 contacts and pushes against the inner wall of the second ring member 300 to be expanded through the second valve die 9, as the expansion core cone 2 continues to move downwards, the second valve die 9 can realize expansion forming of the second ring member 300 to be expanded, and the diameter and the size of the second ring member 300 to be expanded are preferably changed in a range of phi 7000 mm-phi 10000mm, for example, from phi 7000mm to phi 9400mm. When the master cylinder piston rod 102 is retracted, the bulging inclined block 3 moves back and resets inwards along the radial direction of the ring member under the action of the reset cylinder body 71 and the reset cylinder piston rod 72, the valve die is separated from the bulging ring member, and the stroke of the reset cylinder is preferably larger than 250mm.
In the present embodiment, a return cylinder 11 is further provided, the return cylinder 11 is provided outside the master cylinder body 101, and mainly includes a return cylinder body 111 and a return cylinder plunger 112, the return cylinder body 111 being fixed outside the master cylinder body 101; the bottom end of the return cylinder plunger 112 is slidably mounted in the return cylinder block 111, and the top end is connected to the fixed beam 4.
In this embodiment, the bulging core cone 2 is preferably made of forged alloy steel 42CrMo, and is subjected to quenching and tempering treatment, and the flat polished surface is nitrided, so that the bulging core cone is high in hardness, wear-resistant and long in service life, and a reliable bulging force is provided for bulging.
In this embodiment, the master cylinder body 101 is made of 18MnMoNb, and the forging and the weld joint are subjected to ultrasonic flaw detection according to the high-pressure vessel standard. The master cylinder piston rod 102 is preferably made of a forging piece, the material is 20SiMn, the surface hardening is performed by adopting a surfacing process, the surfacing material is martensitic stainless steel, the thickness of the surfacing layer after processing is about 34mm, and the surface hardness is HRC4555. The stress is eliminated through heat treatment after surfacing, and the surface after heat treatment is finely ground, so that the high-precision and high-quality surface is obtained, and the service life of the sealing element and the sealing reliability are ensured. Wherein, plunger seal is arranged between the guide sleeve and the pressing sleeve of the main cylinder body 101, and the sealing performance of the main cylinder is ensured by adopting V-shaped combined seal of Merkel corporation in Germany. The pressing sleeve flange is provided with an oil discharging pipeline for connecting oil which is likely to leak into an oil collecting tank below the ground.
In this embodiment, the pull rod 103 is preferably a saw-tooth threaded pull rod formed by forging integrally, and the pull rod is preferably made of 30Cr2Ni2Mo, and is subjected to ultrasonic flaw detection, so that the uniformity of stress of the pull rod threads is fully ensured.
In this embodiment, the first die 8 may be a 5-meter-level bulging die, the second die 9 may be a 10-meter-level bulging die, the first die 8 and the second die 9 are preferably ZG35 steel forgings, self-lubricating copper sliding plates are mounted on the inner surfaces of the first die 8 and the second die 9, sliding friction pairs are formed between the self-lubricating copper sliding plates and the guide plates of the pushing surfaces of the bulging core cones 3, and the self-lubricating copper sliding plates can effectively reduce friction between the guide surfaces, so that bulging is facilitated.
In the embodiment, the bulging inclined block 3 is preferably made of forged alloy steel 42CrMo, and wear-resistant guide plates are inlaid on the contact surfaces of the bulging inclined block 3 and the guide rail of the bulging core cone 2 and the fixed beam 4, wherein the guide plates are made of ZCUAl10Fe4Ni2, so that the bulging inclined block is high in hardness, wear-resistant and long in service life.
In this embodiment, the fixed beam 4 is preferably integrally cast from ZG35Mn alloy steel, and is mainly subjected to downward pressure of the bulging swash block 3 and upward pressure of the master cylinder piston rod 102 during operation.
In this embodiment, both the return cylinder plunger 112 and the return cylinder body 111 are preferably 45# forgings, the surface hardening of the return cylinder plunger 112 adopts a build-up welding process, the build-up welding material is martensitic stainless steel, the thickness of the build-up welding layer after processing is about 34mm, and the surface hardness is HRC4555. The stress is eliminated through heat treatment after surfacing, and the surface after heat treatment is finely ground, so that the high-precision and high-quality surface is obtained, and the service life of the sealing element and the sealing reliability are ensured. The return cylinder adopts a plunger cylinder structure, and the seal adopts V-shaped combined seal of Merkel corporation in Germany, so that the return cylinder has good sealing performance, long service life and convenient replacement.
The working principle of the pull-down type numerically controlled ring expander 100 according to this embodiment will be specifically described below by taking the example that the expanding inclined block 3 is provided with the first pushing surface 32 and the second pushing surface 33.
The bulging inclined block 3 is provided with a first pushing surface 32 and a second pushing surface 33, and particularly forms a numerical control ring two-stage bulging machine, so that two rings can be bulged simultaneously. By arranging the two-stage bulging core cone-bulging inclined block 3 and additionally arranging the valve die on the outer ring of the bulging inclined block 3, the stepless change of the inner diameter of the formed ring in the two size ranges between phi 3800 mm-phi 4650mm and phi 7000 mm-phi 10000mm can be realized, and the problems that the formed ring of the traditional bulging machine is single in size and diameter, the steps for manufacturing annular components with different diameters are complex, and the energy waste is serious are solved. In actual operation, the numerical control ring two-stage bulging machine can be debugged into a phi 10000mm/80MN numerical control ring two-stage bulging machine, a one-stage bulging die is additionally added compared with a traditional ring bulging machine, expansion and lifting of functions of the bulging machine are realized through structural change, stepless change of the inner diameter of a formed ring within two size ranges is realized, the problem that the application size range of the existing pull-down ring bulging machine is small is solved, and the manufacturing requirement of a spaceflight phi 10000mm grade AA2219 aluminum alloy ring can be met.
It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. A drop down numerically controlled ring expander, comprising:
the workbench is provided with a core cone avoiding hole;
the bulging core cone is vertically arranged above the workbench, the small end of the bulging core cone is close to the workbench, the large end of the bulging core cone is far away from the workbench, and the small end of the bulging core cone can pass through the core cone avoiding hole when going downwards;
the bulging oblique blocks are arranged on the upper surface of the workbench and uniformly distributed on the periphery of the bulging core cone along the circumferential direction of the ring to be bulged by taking the bulging core cone as the center; any bulging inclined block is arranged along the radial direction of the ring to be bulged, and is in sliding connection with the upper surface of the workbench; one end of any bulging inclined block, which is close to the bulging core cone, is arranged to be parallel to an inclined plane of the side wall of the bulging core cone, and an inclined plane contact pair is formed between the inclined plane and the side wall of the bulging core cone; a plurality of pushing surfaces are arranged at one end, far away from the bulging core cone, of any bulging inclined block, and are arranged in a multi-layer stepped manner from top to bottom along the axial direction of the bulging core cone, and the pushing surfaces of different layers are used for radially pushing the ring pieces to be bulged with different diameters;
and the pull-down drive is arranged below the workbench and connected with the bulging core cone so as to pull down the bulging core cone and push the bulging inclined blocks outwards along the radial direction of the ring to be bulged.
2. The drop-down numerical control ring bulging machine according to claim 1, wherein a first pushing surface and a second pushing surface are respectively arranged at the other end of any bulging inclined block, which is far away from the bulging core cone, and the first pushing surface and the second pushing surface are arranged in a two-layer stepped manner from top to bottom along the axial direction of the bulging core cone.
3. The drop down numerically controlled ring expander as in claim 2, wherein the table comprises:
a fixed beam;
the support tray is arranged on the upper surface of the fixed beam, and the core cone avoiding holes sequentially penetrate through the support tray and the fixed beam; the bulging inclined blocks are arranged on the upper surface of the supporting tray.
4. A drop down numerically controlled ring expander as in claim 3, wherein the support tray comprises:
the lower support frames are arranged on the upper surfaces of the fixed beams and comprise a plurality of lower support rods which are uniformly distributed along the circumferential direction by taking the bulging core cone as a center;
the upper support frames are arranged on the lower support frames, the upper support frames comprise a plurality of upper support rods, the upper support rods are uniformly distributed along the circumferential direction by taking the bulging core cone as a center, and the upper support rods and the lower support rods are arranged in a one-to-one correspondence manner;
the upper support rod is used for supporting the ring to be expanded corresponding to the first pushing surface, and the lower support rod is used for supporting the ring to be expanded corresponding to the second pushing surface; the upper surface of any lower layer bracing piece all sets up one bulging sloping block, and any bulging sloping block all with corresponding upper layer bracing piece sliding fit.
5. The drop down numerically controlled ring expander as in claim 4, further comprising a plurality of rotating mechanisms, wherein any one of the rotating mechanisms comprises:
the rotary supporting roller bearing seat is arranged between the adjacent lower supporting frames and/or between the adjacent upper supporting rods;
the rotary supporting roller is rotatably arranged on the rotary supporting roller bearing seat and is arranged along the radial direction of the ring piece to be expanded; the rotary supporting roller is used for supporting the ring piece to be expanded;
the rotary driving device is arranged on the bearing seat of the rotary supporting roller and connected with one end of the rotary supporting roller, and the rotary driving device is used for driving the rotary supporting roller to rotate so as to drive the ring to be expanded to rotate around the expansion core cone.
6. The drop-down numerical control ring bulging machine according to claim 4 or 5, further comprising a plurality of reset cylinders, the plurality of reset cylinders being disposed in one-to-one correspondence with the plurality of lower support rods, wherein any one of the reset cylinders comprises:
the reset cylinder body is arranged on the lower surface of the lower-layer supporting rod;
and one end of the reset cylinder piston rod is slidably arranged in the reset cylinder body, and the other end of the reset cylinder piston rod is connected with the bulging inclined block so as to drive the bulging inclined block to move back and reset along the radial direction of the ring to be bulged.
7. The drop down numerically controlled ring expander as in any one of claims 2 to 4, further comprising a plurality of first petals and a plurality of second petals, wherein,
the plurality of first clack moulds are arranged in one-to-one correspondence with the bulging inclined blocks, the inner sides of the first clack moulds are connected with the first pushing surfaces, and the outer sides of the first clack moulds are provided with first clack mould pushing cambered surfaces which can be attached to the inner wall surface of the ring to be bulged;
the second valve molds are arranged in one-to-one correspondence with the bulging inclined blocks, the inner sides of the second valve molds are connected with the second pushing surfaces, and the outer sides of the second valve molds are arranged to be second valve mold pushing cambered surfaces which can be attached to the inner wall surfaces of the ring to be bulged.
8. The drop-down numerical control ring bulging machine according to claim 7, characterized in that the first valve die can increase the diameter of the ring to be bulged from phi 3000mm to phi 5000mm at maximum under the pushing of the first pushing surface;
the second valve die can enable the diameter of the ring piece to be expanded to be increased from phi 7000mm to phi 10000mm at maximum under the pushing of the second pushing surface.
9. The drop down numerically controlled ring expander of any one of claims 1 to 4, wherein the drop down drive is a drop down master cylinder comprising:
the main cylinder body is arranged below the fixed beam, and an opening of the main cylinder body faces the fixed beam; the main cylinder body is connected with the bulging core cone through a pull rod;
the bottom end of the main cylinder piston rod is slidably mounted in the main cylinder body, and the top end of the main cylinder piston rod is connected with the fixed beam.
10. The drop down numerically controlled ring expander as in claim 9, further comprising a return cylinder disposed outside of the master cylinder block, comprising:
a return cylinder body fixed to an outer side of the master cylinder body;
and the bottom end of the return cylinder plunger is slidably arranged in the return cylinder body, and the top end of the return cylinder plunger is connected with the fixed beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310456345.7A CN116475304A (en) | 2023-04-25 | 2023-04-25 | Pull-down type numerical control ring bulging machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310456345.7A CN116475304A (en) | 2023-04-25 | 2023-04-25 | Pull-down type numerical control ring bulging machine |
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| CN116475304A true CN116475304A (en) | 2023-07-25 |
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| CN202310456345.7A Pending CN116475304A (en) | 2023-04-25 | 2023-04-25 | Pull-down type numerical control ring bulging machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117884526A (en) * | 2024-03-18 | 2024-04-16 | 中国重型机械研究院股份公司 | Multi-cylinder balance-driven annular forging bulging device and bulging method |
-
2023
- 2023-04-25 CN CN202310456345.7A patent/CN116475304A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117884526A (en) * | 2024-03-18 | 2024-04-16 | 中国重型机械研究院股份公司 | Multi-cylinder balance-driven annular forging bulging device and bulging method |
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