CN221388401U - Hydraulic forming device for three-way pipe blank - Google Patents

Abstract

The application relates to the technical field of hydraulic forming, and particularly discloses a hydraulic forming device for a three-way pipe blank. The three-way pipe blank hydraulic forming device comprises an upper die and a lower die which is tightly matched with the upper die, an extrusion cavity for placing pipe blank materials is formed between the upper die and the lower die, extrusion parts are arranged at two ends of the upper die and the lower die, forming through holes communicated with the extrusion cavity are formed in the lower die, a buffer part is arranged in each forming through hole, each buffer part comprises a fixing block, an elastic part connected with the fixing block and a sliding block connected with the elastic part, the fixing block is arranged at the bottom of each forming through hole, the sliding blocks slide through the forming through holes, and the first extrusion parts and the second extrusion parts are connected with liquid injection assemblies. The hydraulic forming device for the three-way pipe blank has the effect of preventing the three-way pipe blank from being excessively expanded, so that the wall thickness of the finished product of the three-way pipe blank is uniform.

Description

Hydraulic forming device for three-way pipe blank

Technical Field

The application relates to the technical field of hydraulic forming, in particular to a three-way pipe hydraulic forming device.

Background

The traditional processing technology of the multi-way pipe is mainly completed through two straight pipe insert welding and two half pipe welding, and the technology has the advantages of high rejection rate, poor reliability and high fluid resistance. At present, through the internal high-pressure forming technology, the pipe blank can be directly processed into a multi-way pipe with an integral structure, so that the forming precision and quality of the multi-way pipe are greatly improved, the working procedures are reduced, and the production cost is reduced.

In the related art, tee bend pipe blank hydraulic forming device includes mould, lower mould, first extrusion piece and second extrusion piece, goes up mould and the mutual pressfitting of lower mould and forms the extrusion chamber that holds the tubular product blank, and first extrusion piece and second extrusion piece set up in the both ends of extrusion chamber, and the shaping hole with extrusion chamber intercommunication has been seted up to the lower mould, and the center of second extrusion piece is provided with the pressure liquid pipe that is used for high-pressure liquid circulation. The working process of the hydraulic forming of the three-way pipe blank is as follows: placing the pipe blank in an extrusion cavity, sealing openings at two ends of the pipe blank by a first extrusion piece and a second extrusion piece, then injecting high-pressure liquid into the pipe blank through a pressure liquid pipe, synchronously extruding the pipe blank by the first extrusion piece and the second extrusion piece, raising the internal pressure of the extruded pipe blank, and expanding the pipe blank in a forming hole to form a branch pipe, thereby finally preparing the three-way pipe blank.

The technical scheme still has the following defects: in the initial stage of forming the three-way pipe blank, the forming speed of the branch pipe is higher through the extrusion of the first extrusion piece and the second extrusion piece, so that the branch pipe is excessively stretched, and the wall of the branch pipe is uneven.

Disclosure of utility model

In order to make the wall thickness of the three-way pipe blank more uniform after molding, the application provides a hydraulic molding device for the three-way pipe blank.

The application provides a three-way pipe blank hydraulic forming device, which adopts the following technical scheme:

The utility model provides a tee bend pipe blank hydraulic forming device, includes the mould, with last mould pressing tight fit's lower mould, go up the mould with be formed with the extrusion chamber that is used for supplying pipe blank material to place between the lower mould, the both ends of going up mould and lower mould are provided with the extrusion piece, the shaping through-hole with extrusion chamber intercommunication has been seted up to the lower mould, be provided with the bolster in the shaping through-hole, the bolster includes the fixed block, the elastic component of being connected with the fixed block and the sliding block of being connected with the elastic component, the fixed block sets up in the bottom of shaping through-hole, the shaping through-hole supplies the sliding block to slide, first extrusion piece and second extrusion piece are connected with annotate the liquid subassembly.

Through adopting above-mentioned technical scheme, when tee bend pipe blank hydroforming, place the pipe blank in the extrusion chamber, two extrusions compress tightly to the extrusion chamber center, make pipe blank in the airtight space, later through annotate the water injection in the liquid subassembly to the pipe blank, the extrusion removes the extrusion to pipe blank center, because intraductal pressure effect, pipe blank forms the branch pipe in the shaping through-hole. The movement of the sliding block is synchronous with the formation of the branch pipes, and the sliding block always gives back pressure to the branch pipes, so that the shape and the size of the three-way pipe blank are corrected, the thickness of the pipe wall of the formed three-way pipe blank is uniform, and the excessive expansion of the branch pipes is avoided, so that the end part areas of the branch pipes are too thin and even cracked. After the tee pipe blank is manufactured, the upper die is removed, the sliding block is pushed by the elastic piece to recover deformation, and the sliding block ejects the tee pipe blank.

Optionally, a limit rod is connected to one side of the sliding block, which is close to the fixed block.

By adopting the technical scheme, the moving process of the sliding block can be limited, namely the forming length of the branch pipe is limited. When the limiting rod is abutted with the fixed block, the hydraulic pressure is finished, and the three-way pipe blank is formed.

Optionally, the stop lever is detachably connected with the sliding block.

Through adopting above-mentioned technical scheme, can change the gag lever post of different length, the distance of gag lever post tip to the fixed block is the actual length after the branch pipe forms. The shorter the spacing pole, the longer the branch pipe length that forms, the longer the spacing pole, the shorter the branch pipe length that forms, can satisfy the demand of the three-way pipe of preparation different models, and the spacing pole has advantages such as convenient dismantlement, easy maintenance, saving cost.

Optionally, a first pushing member is connected to a side of the upper die facing away from the lower die.

Through adopting above-mentioned technical scheme, place the pipe blank after, first pusher promotes the mould and moves down to with last mould and lower mould pressing, when preventing extrusion pipe blank, extrusion is extruded from the clearance of last mould and lower mould, avoids the surface of pipe blank to form the wrinkle.

Optionally, the upper die and the lower die are connected with a magnetic component.

Through adopting above-mentioned technical scheme, when going up mould and lower mould and mutually pressing, go up mould and lower mould and need tight silk joint, because the pressfitting contact surface is less, consequently the inaccurate condition of pressfitting is unavoidably appeared, then with the help of the magnetic subassembly of inhaling each other the actuation of mould and lower mould, will go up mould and lower mould and fix in advance, again compress tightly mould and lower mould with the help of first propelling movement piece.

Optionally, the extrusion piece includes the shutoff piece, the extrusion piece of being connected with the shutoff piece and the second pusher of being connected with the extrusion piece, the shutoff piece is used for with the inner wall butt of tube.

Through adopting above-mentioned technical scheme, the shutoff piece can insert tube blank inner chamber, prevents after annotating the liquid to the extrusion intracavity that liquid from flowing out from the inner chamber, and the extrusion piece receives the thrust of second pusher and extrudees the border of tube blank.

Optionally, the plugging block is connected with a sealing ring.

Through adopting above-mentioned technical scheme, form effectual sealed between shutoff piece and tube blank material, prevent leakage of liquid and gas, prevent simultaneously that external environment's dust or other impurity from invading, ensure the normal operating of device system, reduce the frequency and the cost of maintaining and maintaining. And secondly, the sealing ring can form a layer of lubricating oil film between the plugging block and the inner wall of the tube blank, so that friction and abrasion between parts are reduced, and the service life of the device is prolonged.

At the same time, dimensional or installation errors may occur during the manufacture of the tube blank, and there may be poor fit between the tube blank and the block, resulting in gaps or deviations. The sealing ring has certain elasticity and plasticity, can compensate bad cooperation, ensures sealed effect.

Optionally, annotate the liquid subassembly and include the liquid reserve tank, annotate the liquid pump of being connected with the liquid reserve tank, with annotate the high-pressure liquid pipe that the liquid pump is connected, the shutoff piece with the extrusion piece is provided with the liquid through hole, liquid through hole and extrusion chamber intercommunication, liquid through hole and high-pressure liquid pipe intercommunication.

Through adopting above-mentioned technical scheme, the liquid in the liquid filling pump will liquid reserve tank pours into through the high-pressure liquid pipe into in the liquid hole, finally gets into tube blank material inner chamber, along with the inflow of liquid, the inside pressure of tube blank material will increase.

Optionally, the liquid in the liquid storage tank is emulsion.

By adopting the technical scheme, on one hand, the emulsion can be matched with a liquid injection pump to add liquid into the pipe blank so as to increase the internal hydraulic load; on the other hand, the emulsion can realize lubrication. The emulsion can be reused, and the pollution to the pipe blank and the environment is avoided.

In summary, the application has the following beneficial effects:

1. Through setting up the bolster, the removal of sliding block is synchronous with the formation of branch pipe, and the sliding block gives branch pipe backpressure all the time, can avoid the branch pipe excessive expansion of tee bend pipe blank, causes the problem that branch pipe tip region is too thin even broken for the wall thickness is even after the tee bend pipe blank is made.

2. Through setting up detachable gag lever post, can change the gag lever post of different length, and then the formation length of control branch pipe.

Drawings

FIG. 1 is a schematic view of a hydraulic forming device for a three-way pipe blank according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of an upper die, lower die and extrusion of an embodiment of the present application;

FIG. 3 is an enlarged schematic view of the area A in FIG. 2;

FIG. 4 is an enlarged schematic view of the area B in FIG. 2;

FIG. 5 is a schematic illustration of the structure of an extrusion of an embodiment of the present application;

reference numerals illustrate: 1. an upper die; 11. a first pushing member; 2. a lower die; 21. forming a through hole; 3. an extrusion chamber; 4. an extrusion; 41. a block; 411. a seal ring; 412. a liquid through hole; 42. extruding a block; 43. a second pushing member; 5. a buffer member; 51. a fixed block; 52. an elastic member; 53. a sliding block; 54. a limit rod; 6. a liquid injection assembly; 61. a liquid storage tank; 62. a liquid injection pump; 63. a high-pressure liquid pipe; 7. and a magnetic attraction component.

Detailed Description

The application is described in further detail below with reference to fig. 1-5.

The terms "upper" and "lower" in the embodiments of the present application are merely used to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly. In the embodiment of the present application, "upper" and "lower" are based on the state of fig. 1, that is, the side of the upper mold 1 close to the first pushing member 11 is the upper side, and the side of the upper mold 1 far from the first pushing member 11 is the lower side.

The embodiment of the application discloses a hydraulic forming device for a three-way pipe blank.

Referring to fig. 1 and 2, the three-way pipe blank hydraulic forming device comprises an upper die 1, a lower die 2, an extrusion piece 4 and a liquid injection component 6, wherein the upper die 1 is arranged right above the lower die 2, an extrusion cavity 3 is formed between the upper die 1 and the lower die 2 in a pressing manner, pipe blank materials are placed in the extrusion cavity 3, and a hollow pipeline is formed after the upper die 1 and the lower die 2 are pressed. The extrusion pieces 4 are arranged on two sides of the extrusion cavity 3, and the two extrusion pieces 4 are identical in shape and are oppositely arranged. The upper end of the upper die 1 is fixedly connected with a first pushing piece 11, and the first pushing piece 11 is used for pushing the upper die 1 to be pressed with the lower die 2. The opposite sides of the upper die 1 and the lower die 2 are fixedly connected with a magnetic attraction assembly 7, and the magnetic attraction assembly 7 helps the upper die 1 and the lower die 2 to be attracted and positioned mutually.

In the embodiment of the application, the first pushing member 11 adopts a hydraulic cylinder, and the middle section of the upper die 1 is fixedly connected with a piston rod of the hydraulic cylinder. In other embodiments, the first pushing member 11 may also employ a cylinder, a motor, or other driving member.

Referring to fig. 2 and 3, the lower die 2 is provided with a molding through-hole 21 communicating with the extrusion chamber 3, and a branch pipe is formed in the molding through-hole 21. The bottom of the forming through hole 21 is provided with a buffer piece 5, and the buffer piece 5 plays a role in buffering and supporting the formation of the branch pipe.

The buffer member 5 comprises a fixed block 51, an elastic member 52, a sliding block 53 and a limiting rod 54, wherein the fixed block 51 is arranged at the bottom of the forming through hole 21, one end of the elastic member 52 is fixedly connected with the fixed block 51, the other end of the elastic member is fixedly connected with the sliding block 53, and the sliding block 53 slides in the forming through hole 21. After the branch pipe is formed, the branch pipe will press the sliding block 53 to move downwards, and at this time the elastic member 52 is forced to compress and accumulate elastic potential energy. The stop lever 54 is screwed on one side of the sliding block 53 close to the fixed block 51, and the sliding block 53 slides downwards until the stop lever 54 abuts against the fixed block 51.

Referring to fig. 4 and 5, the extrusion member 4 includes a plugging block 41, an extrusion block 42, and a second pushing member 43, one end of the extrusion block 42 is fixedly connected with the plugging block 41, the other end is fixedly connected with the second pushing member 43, the plugging block 41 is disposed on one side of the extrusion block 42 close to the extrusion cavity 3, and the second pushing member 43 is used for pushing the extrusion block 42 and the plugging block 41 to move toward the extrusion cavity 3. During extrusion, the plugging block 41 is inserted into the tube blank cavity, the extrusion block 42 acts on the edge of the tube blank, and transverse pressure is applied to the tube blank. The sealing ring 411 is arranged on the outer side of the plugging block 41, and the sealing ring 411 is arranged between the plugging block 41 and the tube blank during extrusion to form an effective seal.

In the embodiment of the present application, the second pushing member 43 is a hydraulic cylinder, and the pressing block 42 is fixedly connected to a piston rod of the hydraulic cylinder. In other embodiments, the second pushing member 43 may also employ a cylinder, motor, or other driving member.

Referring to fig. 1 and 5, the liquid injection unit 6 includes a liquid tank 61, a liquid injection pump 62, and a high-pressure liquid pipe 63, wherein the liquid stored in the liquid tank 61 is emulsion, and the liquid injection pump 62 is disposed at a liquid outlet of the liquid tank 61. The plugging block 41 and the extrusion block 42 are provided with a liquid through hole 412, the emulsion is pressurized and injected into the liquid through hole 412 by the high-pressure liquid pipe 63 through the liquid injection pump 62, and finally the emulsion flows into the inner cavity of the tube blank through the liquid through hole 412.

The embodiment of the application relates to a three-way pipe blank hydraulic forming device, which comprises the following implementation principle: the pipe blank is placed in the lower die 2, the first pushing piece 11 pushes the upper die 1 to be pressed down, the magnetic attraction components 7 are attracted with each other, and the upper die 1 and the lower die 2 compress the pipe blank. The second pushing piece 43 pushes the extrusion block 42 and the plugging block 41 to enter the extrusion cavity 3, the plugging block 41 is inserted into the inner cavity of the pipe blank, and the side wall of the extrusion block 42 is abutted with the edge of the pipe blank. Then, the high-pressure liquid pipe 63 conveys the emulsion from the liquid tank 61 to the inner cavity of the tube blank, and at the same time, the second pushing member 43 continuously pushes the extrusion block 42, so that the extrusion block 42 extrudes the tube blank, the volume of the tube blank is reduced, and the internal pressure is increased. The pipe blank expands into the forming through hole 21 and gradually forms a branch pipe, the branch pipe pushes the sliding block 53 to slide in the forming through hole 21 in the forming process until the limiting rod 54 is abutted with the fixed block 51, and the three-way pipe blank is formed. Finally, the first pushing piece 11 and the second pushing piece 43 are reset, the sliding block 53 is subjected to the elastic force of the elastic piece 52 for restoring deformation, and the sliding block 53 pushes the three-way pipe blank to exit from the forming through hole 21.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (9)

1. The utility model provides a tee bend pipe blank hydraulic forming device, includes mould (1), with last mould (1) compression fit's lower mould (2), go up mould (1) with be formed with between lower mould (2) and be used for supplying extrusion chamber (3) that the pipe blank material placed, the both ends of going up mould (1) and lower mould (2) are provided with extrusion piece (4), its characterized in that: the forming through hole (21) communicated with the extrusion cavity (3) is formed in the lower die (2), the buffer piece (5) is arranged in the forming through hole (21), the buffer piece (5) comprises a fixed block (51), an elastic piece (52) connected with the fixed block (51) and a sliding block (53) connected with the elastic piece (52), the fixed block (51) is arranged at the bottom of the forming through hole (21), the forming through hole (21) is used for enabling the sliding block (53) to slide, and the extrusion piece (4) is connected with a liquid injection assembly (6).

2. The three-way tube blank hydroforming device according to claim 1, wherein: one side of the sliding block (53) close to the fixed block (51) is connected with a limiting rod (54).

3. The three-way tube blank hydroforming device according to claim 2, wherein: the limiting rod (54) is detachably connected with the sliding block (53).

4. The three-way tube blank hydroforming device according to claim 1, wherein: one side of the upper die (1) deviating from the lower die (2) is connected with a first pushing piece (11).

5. The three-way tube blank hydroforming device according to claim 1, wherein: the upper die (1) and the lower die (2) are connected with a magnetic component (7).

6. The three-way tube blank hydroforming device according to claim 1, wherein: the extrusion piece (4) comprises a blocking block (41), an extrusion block (42) connected with the blocking block (41) and a second pushing piece (43) connected with the extrusion block (42), and the blocking block (41) is used for being abutted with the inner wall of the pipe blank.

7. The three-way tube blank hydroforming device according to claim 6, wherein: the sealing block (41) is connected with a sealing ring (411).

8. The three-way tube blank hydroforming device according to claim 6, wherein: the liquid injection assembly (6) comprises a liquid storage tank (61), a liquid injection pump (62) connected with the liquid storage tank (61) and a high-pressure liquid pipe (63) connected with the liquid injection pump (62), the plugging block (41) and the extrusion block (42) are provided with liquid through holes (412), the liquid through holes (412) are communicated with the extrusion cavity (3), and the liquid through holes (412) are communicated with the high-pressure liquid pipe (63).

9. The three-way tube blank hydroforming device according to claim 8, wherein: the liquid in the liquid storage tank (61) is emulsion.