CN111842608B - Pressure expansion composite internal high-pressure forming device and process for torsion piece - Google Patents
Pressure expansion composite internal high-pressure forming device and process for torsion piece Download PDFInfo
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- CN111842608B CN111842608B CN202010497068.0A CN202010497068A CN111842608B CN 111842608 B CN111842608 B CN 111842608B CN 202010497068 A CN202010497068 A CN 202010497068A CN 111842608 B CN111842608 B CN 111842608B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a pressure expansion composite internal high pressure forming process of a torsion piece, which comprises an upper template (5) and a lower template (6), the torsion piece (7) comprises a center with a cross section in a shape of Chinese character kou, lateral characteristic parts (7.3) and a positive characteristic part (7.2) which are arranged at two ends of the center, and end characteristic parts (7.1) which are arranged at the outer ends of the lateral characteristic parts (7.3) and the positive characteristic part (7.2), the cross-sections of the lateral (7.3) and positive (7.2) features are concave towards the central cross-sectional area of the torsion element (7) and gradually increase, and the arrangement directions of the lateral characteristic part (7.3) and the positive characteristic part (7.2) are staggered by 90 degrees, a pressure expansion composite internal high pressure forming device and process of the torsion piece are provided, the method has the advantages of reducing production processes and production cost, ensuring the forming precision of the torsion piece and improving the working efficiency.
Description
Technical Field
The invention relates to die pressing forming equipment, in particular to a pressing expansion composite internal high-pressure forming device and a pressing expansion composite internal high-pressure forming process for a torsion piece.
Background
At present, in the production of a special-shaped torsion piece, the torsion piece is a thin-wall pipe with a large diameter, a complex section and a small reducing corner exist, the section changes violently along an axis, local stress concentration is easy to cause, and even dead wrinkles are generated.
Disclosure of Invention
Aiming at the defects of the prior art, the pressure expansion composite internal high pressure forming device and process of the torsion piece are provided, so that the production procedures and the production cost are reduced, the forming precision of the torsion piece is ensured, and the working efficiency is improved.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides a process of compound interior high-pressure forming that rises of torsion piece, includes cope match-plate pattern and lower bolster, the torsion piece includes that the cross-section is "concave" type setting and along axis to the side direction characteristic portion and the forward characteristic portion that the center gradually enlarges, just the central cross-section of torsion piece is "mouthful" type setting, still includes the first module of fixed setting and the second module, the third module that float and set up, third module, second module, first module compound die in proper order are in order to constitute the die cavity, just the die cavity is unanimous with the profile of torsion piece, still includes following step:
step S1: preparing a pre-bent pipe, and bending a straight pipe to obtain the pre-bent pipe with the axis close to that of the torsion piece;
step S2: the pipe end of the pre-bent pipe is matched with the lower part of the third module, and the upper part of the third module keeps a floating state;
step S3: the driving device drives the upper template to press downwards, and the lower part of the third module is gradually closed to tightly hold the pre-bent pipe, so that the pre-bent pipe is positioned;
step S4: continuing to drive the upper die to press down, pressing the lower part of the third die set and the pre-bent pipe to a die closing position, and keeping the upper part of the third die set in a floating state;
step S5: continuing to drive the upper die to press downwards, gradually enabling the third die set to reach a die closing state, forming an end characteristic part of the torsion piece, and meanwhile, enabling the second die set to be compressed and slowly contacted with the pre-bent pipe to start forming a forward characteristic part of the torsion piece;
step S6: during the integral pressing-down process of the upper die, gradually closing the die by the first die set and forming a lateral characteristic part of the torsion piece;
step S7: after the first module, the second module and the third module are completely assembled, the formed part is quickly filled with liquid and sealed, a high-pressure medium is introduced into one end of the formed part for expanding, so that the formed part is attached to a die and finally formed, and the formed part comprises a first cutting part positioned in the middle, torsion parts positioned at two ends of the first cutting part and a second cutting part positioned at the outer end of the torsion part;
step S8: and the high-pressure medium is withdrawn, the upper die returns, the forming piece is taken out, and the first cutting part and the second cutting part are cut to obtain two twisting pieces.
The invention has the advantages that:
1. by adopting a composite forming method, the torsion piece is subjected to mould pressing preforming through the first module, the second module and the third module, then high-pressure medium is introduced for internal high-pressure forming, and the mould pressing preforming and the internal high-pressure forming are carried out in a mould, so that the operation procedures are reduced, the repeated clamping of the torsion piece is avoided, the contour precision of each characteristic part of the torsion piece and the positioning precision of the torsion piece are ensured, the forming efficiency and the yield of parts are improved, and the scrapping problem of the torsion piece is reduced;
2. the two sides of the first module are provided with the second module, the outer side of the second module is provided with the third module, the die cavities are symmetrical in a center line, each module forms different characteristic parts of the torsion piece, and the symmetrical formed pieces are machined and cut to form two torsion pieces, so that the utilization rate of materials is improved, the machining cost is reduced, and the production efficiency is improved;
3. the second module and the third module float and stretch out in the first module, the third module floats and stretches out in the second module, through the action order of adjusting each module to control the deformation order of characteristic curved surface in the mould pressing preforming process, the torsion piece takes shape from outside to inside in proper order, makes the change of torsion piece curved surface camber gentler, prevents to warp stress concentration, avoids corrugating, improves the homogeneity of torsion piece wall thickness.
Further, the first module comprises a fixed upper die arranged on the upper die plate, two upper die stoppers fixedly arranged on two sides of the fixed upper die, a fixed lower die arranged on the lower die plate and two side forming blocks arranged on two sides of the fixed lower die in a sliding manner, and in the step S6: go up the mould dog and push down gradually and drive two side shaping pieces and draw close each other, just side shaping piece cooperates with fixed mould and fixed lower mould in order to constitute the side direction characteristic portion of torsion piece, through above improvement, accomplishes the location back of torsion piece at the complete compound die of third module, and the second module slowly feeds with first module is synchronous, has reduced the control degree of difficulty, reduces control cost.
Further, the second module includes the floating second upper floating block that sets up on the cope match-plate pattern, floating block protrusion in fixed mould surface on the second, in step S5: the cooperation of the upper second floating block and the fixed lower die is carried out after the torsion piece is positioned and is accomplished through the improvement so as to constitute the forward characteristic part of the torsion piece, and the floating block floats on the second and sets up, plays the cushioning effect, makes the upper second floating block slowly contact with the torsion piece, and the change of the curvature of the forward characteristic part of the torsion piece is smoother.
Further, the third module includes two first upper floating blocks and two lower floating blocks, the two first upper floating blocks are arranged on the upper template in a floating mode, the two lower floating blocks are arranged on the lower template in a floating mode, positioning grooves are formed in the first upper floating blocks and the lower floating blocks, and in the step S2-S4: the pipe end and the constant head tank cooperation of pipe in advance, through above improvement, first floating block and lower floating block float and set up, the location of easy to assemble to at third module compound die in-process, have the space of fluctuation all the time between first floating block and the lower floating block, have better buffering effect, be favorable to reducing the wrinkling on torsion piece surface.
Furthermore, the first upper floating block extends out of the surface of the second upper floating block.
Further, the length of the first upper floating block extending out of the upper die plate is larger than the length of the lower floating block extending out of the lower die plate, through the improvement, the floating stroke of the first upper floating block, the second upper floating block and the lower floating block is controlled to control the action sequence, so that before complete die assembly, the third die set firstly completes positioning of the torsion piece, and then die assembly of the second die set and the first die set is carried out, and accordingly positioning accuracy and forming efficiency of torsion piece forming are guaranteed.
Further, first upper floating block and fixed mould end face contact, the second upper floating block wears to locate between first upper floating block and the fixed mould, and through above improvement, first upper floating block and fixed mould play spacing and the effect of direction to the motion of second upper floating block, guarantee the vertical motion precision of second upper floating block and the profile precision of torsion piece for the forward characteristic portion of torsion piece takes shape more stably.
Further, the lower extreme of going up the mould dog is equipped with first scarf, the outside of side shaping piece is equipped with the second scarf with first scarf complex, first scarf pushes up with the second scarf in order to order about two side shaping pieces to draw close each other, through above improvement, pushes down along with last mould, goes up the mould dog and offsets with the contact of side shaping piece to, the side shaping piece is by the scarf extrusion drive of mutually supporting, makes the motion of side shaping piece more reliable and stable, and the process is slow, is favorable to the smooth shaping of curved surface of torsion piece side direction characteristic portion.
The die further comprises a pouring mechanism, wherein the pouring mechanism comprises lateral baffles arranged at two ends of the lower die plate and plugs arranged on the lateral baffles, and the plugs are used for allowing high-pressure media to pass through the die cavity after the upper die and the lower die are completely closed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a preformed tube blank according to the present invention;
FIG. 3 is a schematic structural view of a shaped article of the present invention;
FIG. 4 is a schematic view of the construction of the torsion member of the present invention;
FIG. 5 is a side cross-sectional view of the present invention;
FIG. 6 is a view of the placement of a pre-bent tube of the present invention on a mold;
FIG. 7 is a schematic structural view of the pre-bent pipe of the present invention in a positioning state;
FIG. 8 is a schematic view of the lower floating block of the present invention in a clamped condition;
FIG. 9 is a cross-sectional view of the present invention after full clamping;
in the figure: 1. a first module; 1.1, fixing an upper die; 1.2, an upper die stop block; 1.2.1, a first wedge surface; 1.3, side forming blocks; 1.3.1, a second wedge surface; 1.4, fixing the lower die;
2. a second module; 2.1, a third nitrogen spring; 2.2, a second upper floating block;
3. a third module; 3.1, a first upper floating block; 3.2, a lower floating block; 3.3, positioning a groove; 3.4, a first nitrogen spring; 3.5, a second gas spring;
4. a pouring mechanism; 4.1, a lateral baffle; 4.2, pouring holes;
5. mounting a template;
6. a lower template;
7. a torsion member; 7.1, end features; 7.2, positive features; 7.3, lateral features;
8. a first cutting portion; 9. a second cutting portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that, although the terms upper, middle, lower, outer, inner, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another for ease of understanding, and are not used to define any direction or order of limitation.
As shown in fig. 1-9, a pressing-expanding composite internal high-pressure forming device for a torsion member comprises an upper die, a lower die and a driving device for driving the upper die to press down, wherein the driving device is a hydraulic cylinder, the upper die comprises an upper die plate 5 and an upper part of a die cavity, the lower die comprises a lower die plate 6 and a lower part of the die cavity, the device further comprises a third die set 3, a second die set 2 and a fixedly arranged first die set 1 which are sequentially matched to form the die cavity, the die cavity is symmetrical along a center line and is consistent with the outline of the torsion member 7, the second die set 2 and the third die set 3 are arranged in a floating manner through an elastic member, the first die set 1 is arranged in the middle of the die cavity, the second die set 2 is arranged at two sides of the die cavity adjacent to the first die set 1, the third die set 3 is arranged at two ends of the die cavity, the third die set 3 is used for forming and positioning an end characteristic part 7.1 of the torsion member, the first module 1 is used to form a lateral feature 7.3 of the torsion element 7.
Still include the gating system, including side direction baffle 4.1 and the end cap of the both sides of lower bolster 6, side direction baffle 4.1 supports with the outside of first upper floating block 3.1 and leans on, be equipped with sprue gate 4.2 on the side direction baffle 4.1, the end cap sets up on sprue gate 4.2, after the complete compound die, first upper floating block 3.1 laminates with lower floating block 3.2 completely, constant head tank 3.3 cooperation on it and communicates with sprue gate 4.2 to supply the end cap to introduce high-pressure medium and expand the shape, make work piece and mould paste the mould.
Specifically, first upper floating block 3.1 protrudes from the surface of second upper floating block 2.2, second upper floating block 2.2 protrudes from the surface of fixed upper die 1.1, lower floating block 3.2 protrudes from the surface of fixed lower die 1.4, and the length of first upper floating block 3.1 extending out of upper die plate 5 is greater than the length of lower floating block 3.2 extending out of lower die plate 6.
Specifically, the elastic component refers to nitrogen spring, and cope match-plate pattern 5 and lower bolster 6 are located to its stiff end, and the installation terminal surface is stretched out to the expansion end, including first nitrogen spring 3.4, second nitrogen spring 3.5 and third nitrogen spring 2.1, and first nitrogen spring 3.4's expansion end is connected with first upper floating block 3.1, and second nitrogen spring 3.5's expansion end is connected with second upper floating block 2.2, and third nitrogen spring 2.1's expansion end is connected with lower floating block 3.2.
Specifically, the first upper floating block 3.1 protrudes out of the surface of the second upper floating block 2.2, which means that the length of the movable end of the first nitrogen spring 3.4 is greater than that of the movable end of the second nitrogen spring 3.5, and the length of the movable end of the third nitrogen spring 2.1 is less than that of the movable end of the first nitrogen spring 3.4, so that the sequence of actions of the first module 1 and the second module 2 is controlled; the length of the first upper floating block 3.1 extending out of the upper template 5 is larger than the length of the lower floating block 3.2 extending out of the lower template 6, namely the length of the movable end of the first nitrogen spring 3.4 is larger than the length of the movable end of the third nitrogen spring 2.1, so that when the lower floating block 3.2 is at a die closing position, the first upper floating block 3.1 is still in a floating state, and buffering is provided for the second die set 2 during die closing.
Specifically, the outer ends of the first upper floating block 3.1 and the lower floating block 3.2 are provided with positioning grooves 3.3 matched with the end parts of the torsion piece 7, so that the positioning accuracy of the torsion piece 7 in the die closing process is ensured.
Specifically, the upper die stop block 1.2 is provided with a first wedge surface 1.2.1, the side forming block 1.3 is provided with a second wedge surface 1.3.1, the upper die stop block 1.2 is positioned at the outer side of the side forming block 1.3, and in the die assembly process, the lower part of the first wedge surface 1.2.1 is matched with the second wedge surface 1.3.1 and gradually pushes the side forming block 1.3 to move towards the torsion piece 7.
Specifically, the front side and the rear side of the lower die corresponding to the side forming block 1.3 are provided with fixed baffles so as to limit the side forming block 1.3.
Specifically, the torsion member 7 includes a forward feature 7.2, a lateral feature 7.3 and an end feature 7.1 which are integrally formed, the lateral feature 7.3 is vertically arranged around an axis relative to the forward feature 7.2, and the forward feature 7.2 and the lateral feature 7.3 are connected at a cross section with the largest area, wherein the largest cross section of the torsion member is in a shape of a Chinese character kou, the cross sections of the forward feature 7.2 and the lateral feature 7.3 are in a shape of a Chinese character 'ao', and the cross section of the Chinese character 'ao' is gradually enlarged near the central part of the torsion member along the axis.
A pressure expansion composite internal high pressure forming process of a torsion piece comprises the following steps:
step S1: preparing a preformed part, cutting a straight pipe according to a torsion piece, reserving allowance at the middle part of the straight pipe as a first cutting part, reserving allowance at two ends of the straight pipe as a second cutting part, and bending the straight pipe to obtain a pre-bent pipe with the axis close to that of the torsion piece 7;
step S2: the pre-bent pipe blank is placed into the positioning groove 3.3 of the lower floating block 3.2, and the lower floating block 3.2 is upwards jacked up under the action of the third nitrogen spring 2.1, so that the pre-bent pipe is fixed on the lower floating block 3.2.
Step S3: driving an upper template 5 to press downwards, matching the first upper floating block 3.1 with the lower floating block 3.2 at first, matching the two positioning grooves 3.3 to hold the pipe end of the pre-bent part tightly to finish positioning, and at the moment, enabling the first upper floating block 3.1 and the lower floating block 3.2 to be in a floating state;
step S4: the upper template 5 is continuously driven to press downwards, the third nitrogen spring 2.1, the lower floating block 3.2 and the pre-bent pipe are pressed to a die assembly position, the first upper floating block 3.1 is still in a floating state at the moment, and the second upper floating block 2.2 is not contacted with the pre-bent pipe;
step S5: the upper die is continuously driven to be pressed downwards, the first nitrogen spring 3.4 is compressed, the first upper floating block 3.1 gradually reaches a die assembly state, the end characteristic part 7.1 of the torsion piece 7 starts to be formed, meanwhile, the second nitrogen spring 3.5 is compressed, the buffering effect is given to the second upper floating block 2.2, the second upper floating block is slowly contacted with the pre-bent pipe, the forward characteristic part 7.2 of the torsion piece 7 starts to be formed, the change of the curvature of the pre-bent pipe is smoother, at the moment, the first nitrogen spring 3.4 and the third nitrogen spring 2.1 are in a fully compressed state, and the second die assembly 2 is fully matched;
step S6: in the integral downward pressing process of the upper template 5, an included angle of 45 degrees is formed between the upper die block 1.2 and the side forming block 1.3, when the step S5 is started, the side forming block is contacted with the pre-bent pipe, the first wedge surface 1.2.1 on the upper die block 1.2 is propped against the second wedge surface 1.3.1 on the side forming block 1.3, and the side forming block 1.3 is driven to approach to the center, so that the side characteristic part 7.3 of the torsion piece 7 is formed;
step S7: after the first die set 1, the second die set 2 and the third die set 3 are matched (namely after die pressing is finished), quickly filling liquid and sealing a die pressing forming piece, introducing a high-pressure medium through a plug at one end to expand, so that the forming piece and a die are attached to each other and finally formed, and the forming piece comprises a first cutting part positioned in the middle, twisting parts positioned at two ends of the first cutting part and a second cutting part positioned at the outer end of the twisting part;
step S8: and the high-pressure medium is withdrawn, the upper die returns, the forming piece is taken out, and the first cutting part and the second cutting part are cut to obtain two twisting pieces.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. A process for the pressure expansion composite internal high pressure forming of a torsion piece comprises an upper template (5) and a lower template (6), wherein the torsion piece (7) comprises a center with a cross section in a shape of a Chinese character kou, lateral characteristic parts (7.3) and a forward characteristic part (7.2) which are arranged at two ends of the center, and end characteristic parts (7.1) which are arranged at the outer ends of the lateral characteristic parts (7.3) and the forward characteristic parts (7.2), the cross sections of the lateral characteristic parts (7.3) and the forward characteristic parts (7.2) are in a shape of a Chinese character 'ao' which gradually increases towards the central cross section of the torsion piece (7), the arrangement directions of the lateral characteristic parts (7.3) and the forward characteristic parts (7.2) are staggered by 90 degrees, the cross section of the end characteristic parts (7.1) is in a shape of a Chinese character 'ao' and is consistent with the cross sections of the outer ends of the lateral characteristic parts (7.3) and the forward characteristic parts (7.2),
the method is characterized in that: the die also comprises a first die set (1) which is fixedly arranged, a second die set (2) and a third die set (3) which are arranged in a floating way, wherein the third die set (3), the second die set (2) and the first die set (1) are sequentially matched to form a die cavity, the outline of the die cavity is consistent with that of the torsion piece (7),
further comprising the steps of:
step S1: preparing a pre-bent pipe, and bending a straight pipe to obtain the pre-bent pipe with the axis close to that of the torsion piece (7);
step S2: the pipe end of the pre-bent pipe is matched with the lower part of the third module (3), and the upper part of the third module (3) keeps a floating state;
step S3: the driving device drives the upper template (5) to press downwards, and the lower part of the third module (3) is gradually closed to tightly hold the pre-bent pipe, so that the pre-bent pipe is positioned;
step S4: the upper die is continuously driven to press downwards, the lower part of the third die set (3) and the pre-bent pipe are pressed to a die closing position, and the upper part of the third die set (3) keeps a floating state;
step S5: continuing to drive the upper die to press downwards, gradually reaching a die closing state by the third die set (3), forming an end characteristic part (7.1) of the torsion piece (7), simultaneously compressing the second die set (2) and slowly contacting with the pre-bent pipe, and starting to form a forward characteristic part (7.2) of the torsion piece (7);
step S6: during the integral pressing-down process of the upper die, the first die set (1) is gradually closed and a lateral characteristic part (7.3) of the torsion piece (7) is formed;
step S7: after the first die set (1), the second die set (2) and the third die set (3) are completely closed, the formed part is quickly filled with liquid and sealed, high-pressure medium is introduced into one end of the formed part for expansion, the formed part and a die are attached and finally formed, and the formed part comprises a first cutting part (8) positioned in the middle, twisting parts positioned at two ends of the first cutting part (8) and a second cutting part (9) positioned at the outer end of the twisting part;
step S8: and (3) withdrawing the high-pressure medium, returning the upper die, taking out the formed piece, and cutting the first cutting part (8) and the second cutting part (9) to obtain two twisting pieces (7).
2. The device for the pressure-expansion composite internal high-pressure forming process of the torsion piece, which is adopted by the process, is characterized in that: first module (1) including fixed last mould (1.1) and fixed two last mould dog (1.2) that set up in fixed last mould (1.1) both sides, fixed lower mould (1.4) and gliding two side forming block (1.3) of locating fixed lower mould (1.4) both sides, in step S6: go up mould dog (1.2) and push down gradually and drive two side forming block (1.3) and draw close each other, just side forming block (1.3) and fixed mould (1.1) and fixed lower mould (1.4) cooperation are in order to constitute side direction characteristic portion (7.3) of torsion piece (7).
3. The device for the pressure-expansion composite internal high-pressure forming process of the torsion piece, which is adopted by the process, is characterized in that: second module (2) is including floating second upper floating block (2.2) that sets up on the cope match-plate pattern, second upper floating block (2.2) protrusion is on fixed mould (1.1) surface, in step S5: the second upper floating block (2.2) cooperates with the fixed lower die (1.4) to constitute a positive feature (7.2) of the torsion element (7).
4. The device adopted in the process of the pressure expansion composite internal high pressure forming of the torsion piece according to the claim 3 is characterized in that: third module (3) float two first upper floating blocks (3.1) and two lower floating blocks (3.2) of setting on cope match-plate pattern (5) including floating, be equipped with constant head tank (3.3) on first upper floating block (3.1) and lower floating block (3.2), in step S2-S4: the pipe end of the pre-bending pipe is matched with a positioning groove (3.3).
5. The device adopted in the process of the pressure expansion composite internal high pressure forming of the torsion piece according to the claim 4 is characterized in that: the first upper floating block (3.1) extends out of the surface of the second upper floating block (2.2).
6. The device adopted in the process of the pressure expansion composite internal high pressure forming of the torsion piece according to the claim 4 is characterized in that: the length of the first upper floating block (3.1) extending out of the surface of the fixed upper die (1.1) is larger than the length of the lower floating block (3.2) extending out of the surface of the fixed lower die (1.4).
7. The device adopted in the process of the pressure expansion composite internal high pressure forming of the torsion piece according to the claim 4 is characterized in that: the first upper floating block (3.1) is abutted to the end face of the fixed upper die (1.1), and the second upper floating block (2.2) is arranged between the first upper floating block (3.1) and the fixed upper die (1.1) in a penetrating mode.
8. The device for the pressure-expansion composite internal high-pressure forming process of the torsion piece, which is adopted by the process, is characterized in that: the lower end of the upper die stop block (1.2) is provided with a first wedge surface (1.2.1), the outer side of the side forming block (1.3) is provided with a second wedge surface (1.3.1) matched with the first wedge surface (1.2.1), and the first wedge surface (1.2.1) and the second wedge surface (1.3.1) are propped against each other to drive the two side forming blocks (1.3) to mutually draw together.
9. The device for the pressure-expansion composite internal high-pressure forming process of the torsion piece, which is adopted by the process, is characterized in that: the die comprises a lower die plate (6) and is characterized by further comprising a pouring mechanism (4), wherein the pouring mechanism (4) comprises lateral baffles (4.1) arranged at two ends of the lower die plate (6) and plugs arranged on the lateral baffles (4.1), and the plugs are used for enabling high-pressure media to pass through a die cavity after the upper die and the lower die are completely closed.
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| CN202010497068.0A CN111842608B (en) | 2020-06-04 | 2020-06-04 | Pressure expansion composite internal high-pressure forming device and process for torsion piece |
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| CN202010497068.0A CN111842608B (en) | 2020-06-04 | 2020-06-04 | Pressure expansion composite internal high-pressure forming device and process for torsion piece |
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| CN111842608B true CN111842608B (en) | 2021-02-05 |
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|---|---|---|---|---|
| CN200998749Y (en) * | 2007-02-06 | 2008-01-02 | 北京建筑工程学院 | Hydraulic expanding equipment for producing special-shaped cross-sectional pipe |
| TW201114521A (en) * | 2009-10-29 | 2011-05-01 | Metal Ind Res & Dev Ct | Method of forming and manufacturing U-shaped metal tube support frame |
| CN102601204A (en) * | 2012-03-15 | 2012-07-25 | 吉林省元隆达工装设备有限公司 | Multi-deformed bending forming method and device for pipe fitting |
| CN103223434B (en) * | 2013-04-10 | 2015-09-30 | 宁波帕沃尔精密液压机械有限公司 | A kind of device for pipe internal high pressure and method |
| CN104226776B (en) * | 2014-09-23 | 2016-07-06 | 桂林电子科技大学 | Thin-wall metal pipe impacts hydraulic expanding-forming system |
| CN105598265A (en) * | 2015-12-21 | 2016-05-25 | 哈尔滨奔马科技有限公司 | Overall forming method of small-relative-bending-radius and large-diameter-thickness-ratio thin-walled bent pipe fitting |
| CN106670296B (en) * | 2016-11-24 | 2018-06-26 | 一重集团大连设计研究院有限公司 | A kind of manufacturing process for the internal high pressure forming mold for shaping hierarchic structure pipe fitting |
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2020
- 2020-06-04 CN CN202010497068.0A patent/CN111842608B/en active Active
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