CN113617918B

CN113617918B - Liquid tank expansion forming device and process

Info

Publication number: CN113617918B
Application number: CN202110903737.4A
Authority: CN
Inventors: 杨奉社; 张国平; 王春扩; 周东华
Original assignee: Shandong Shengrun Automobile Co ltd
Current assignee: Shandong Shengrun Automobile Co ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2023-05-30
Anticipated expiration: 2041-08-06
Also published as: CN113617918A

Abstract

The invention provides a liquid tank body expansion forming device, which comprises the following steps: s1: placing a prefabricated plate blank of aluminum alloy, carbon steel or stainless steel into a special-shaped tank body forming die cavity, and sealing the plate blank by using an axial punch to ensure that the plate blank is airtight; s2: then pressurizing by using a hydraulic press to compress, fix and lock the forming die; s3: and starting the quick liquid filling unit to fill liquid into the inner wall of the plate blank, and timely supplementing high pressure in the whole tank body bulging process. According to the liquid tank body expansion forming device and the liquid tank body expansion forming process, the welding plate blank is utilized, liquid is applied to the interior of the tank body to pressurize the tank body to form a structural style, the tank body is subjected to strain strengthening treatment by applying strengthening pressure at room temperature, the tank body is subjected to overall plastic deformation after the pressure is unloaded, the tank body with stable structure is achieved, the tank body after expansion is light in product quality, low in manufacturing cost and high in quality, the stability of the product quality is better improved, and the standardization and the manufacturing period of tank truck manufacturing are improved.

Description

Liquid tank expansion forming device and process

Technical Field

The invention relates to the field of tank trucks, in particular to a liquid tank body expansion forming device and a liquid tank body expansion forming process.

Background

Tank trucks are vehicles that ship and deliver oil materials.

The tank body is generally made of carbon steel plates, and can also be made of glass fiber reinforced plastic, stainless steel, plastics and other materials.

The existing tank body of the tank truck is high in manufacturing cost, different in appearance style, various in variety and incapable of controlling product quality.

Therefore, there is a need to provide a liquid tank bulge forming apparatus and process that solves the above-mentioned problems.

Disclosure of Invention

The invention provides a liquid tank body expansion forming device and a liquid tank body expansion forming process, which solve the problems that the tank body of the existing liquid tank truck is high in manufacturing cost, different in appearance style, various in variety and incapable of controlling the product quality well.

In order to solve the technical problems, the liquid tank body expansion forming device provided by the invention comprises the following steps:

s1: placing a prefabricated plate blank of aluminum alloy, carbon steel or stainless steel into a special-shaped tank body forming die cavity, and sealing the plate blank by using an axial punch to ensure that the plate blank is airtight;

s2: then pressurizing by using a hydraulic press to compress, fix and lock the forming die;

s3: starting a quick liquid filling machine set to fill liquid into the inner wall of a plate blank, timely supplementing high pressure in the whole tank body bulging process, simultaneously inwards pushing the punching heads at two ends into the supplemented blank, bulging the plate blank under the combined action of internal pressure and axial force until the plate blank is attached to a forming die without gaps, and thus obtaining the required appearance shape;

s4: after the tank body is swelled and formed, the pressure is quickly released through a liquid discharge unit, and the tank body is formed;

s5: and taking down the bulging formed cylinder body from the forming die, then assembling the whole tank body, positioning and mounting the wave-proof plates first, positioning, mounting and welding all the wave-proof plates, and finally positioning and mounting the front and rear special bulging sealing heads or the dished sealing heads.

Preferably, the length of the plate blank 20 in the S1 is set to 3-10 meters.

Preferably, the high pressure supplemented in S2 is between 50 and 150MPa.

Preferably, the liquid is filled into the plate blank and is conveyed through a conveying pipe fitting during liquid discharge, the conveying pipe fitting is installed at the end part of the die, the conveying pipe fitting comprises a main pipe, one end of the main pipe is fixedly connected with a telescopic pipe, one end of the telescopic pipe is fixedly connected with a positioning ring, and one side of the positioning ring is adhered with a magnetic block.

Preferably, a flange plate is arranged at the other end of the main pipe, a sealing ring is fixedly connected to one side of the flange plate and positioned on the surface of the main pipe, and a filling gap is reserved between the sealing ring and the main pipe.

Preferably, one side of the flange plate is connected with a fixing ring, and one side of the fixing ring is fixedly connected with a four-way pipe through a positioning piece.

Preferably, the tip fixedly connected with screw thread axle of mould, the fixed surface of screw thread axle is connected with the screw thread mounting, the screw thread mounting includes star nut, rectangular hole has been seted up to one side of star nut, mould internally connected with sealed packing spare, sealed packing spare includes a seal tube, the inside of annotating the liquid hole is extended to the one end of seal tube, the outside and the inboard of seal tube all bond the cushion.

Preferably, one end of the four-way pipe is provided with a connecting flange, the connecting flange comprises a connecting ring, one side of the connecting ring is adhered with a sealing ring, the connecting ring is provided with a fixing hole, and the surface of the connecting ring is connected with an L-shaped locating piece.

Preferably, an annular sealing groove is formed in one side of the fixing ring.

Preferably, the tank body is assembled and welded by adopting a longitudinal circular seam automatic welding mode, and a carbon dioxide protection welding mode is used, and meanwhile, a gasket is added on the back of the welding seam.

Preferably, the positioning piece comprises a fixed shaft, an annular groove is formed in the surface of one end of the fixed shaft, an annular cylinder is sleeved on the surface of the fixed shaft and positioned in the annular groove, a spring is arranged in the annular cylinder, the inner side end of the spring is fixedly connected with the fixed shaft, the outer side end of the spring is fixedly connected with the annular cylinder, limiting blocks are symmetrically and fixedly connected with the surface of the annular cylinder, limiting cavities are symmetrically arranged on one side of the annular cylinder, and stop blocks are symmetrically arranged on one side of the inner wall of the annular groove;

preferably, the fixing hole comprises a circular hole, and strip-shaped holes are correspondingly formed in two sides of the inner wall of the circular hole.

Compared with the related art, the liquid tank body expansion forming device and the process provided by the invention have the following beneficial effects:

the invention provides a liquid tank body expansion forming device and a liquid tank body expansion forming process, which utilize welding plate blanks, apply liquid pressurization to the inside to expand the tank body to form a structural style, apply strengthening pressure to the tank body at room temperature to carry out strain strengthening treatment, and enable the tank body to generate overall plastic deformation after unloading the pressure, and achieve the tank body with stable structure.

Drawings

FIG. 1 is a schematic block diagram of a first embodiment of a liquid tank bulge forming apparatus and process provided by the present invention;

FIG. 2 is a cross-sectional view of a mold provided by the present invention;

FIG. 3 is a cross-sectional view of a mold provided by the present invention;

FIG. 4 is a schematic block diagram of a second embodiment of a liquid tank bulge forming apparatus and process provided by the present invention;

FIG. 5 is a schematic view of the main pipe shown in FIG. 4;

FIG. 6 is a schematic view of the star nut of FIG. 4;

FIG. 7 is a schematic view of the connection flange shown in FIG. 4;

FIG. 8 is a schematic view of the seal packing shown in FIG. 4;

fig. 9 is an enlarged schematic view of the portion a shown in fig. 4.

Reference numerals in the drawings:

11. a main pipe, 12, a telescopic pipe, 13, a positioning ring, 14, a magnetic block, 15, a flange plate, 16, a sealing ring, 17, a filling gap, 18 and a connecting disc,

2. a sealing filling piece, 21, a sealing cylinder, 22, a fixing ring, 23 and a rubber cushion,

3. the threaded shaft is provided with a threaded hole,

4. screw-threaded fasteners, 41, star nuts, 42, rectangular holes,

5. a connecting flange 51, a connecting ring 52, an L-shaped positioning piece 53, a sealing ring 54 and a fixing hole,

6. a positioning piece, a 7, a four-way pipe,

10. mould, 20, plate blank, 30, liquid injection hole, 40, blank, 50, sealing device.

Detailed Description

The invention will be further described with reference to the drawings and embodiments.

Referring to fig. 1, 2 and 3 in combination, fig. 1 is a schematic block diagram of a first embodiment of a liquid tank bulge forming apparatus and process according to the present invention; FIG. 2 is a cross-sectional view of the mold shown in FIG. 1; fig. 3 is a cross-sectional view of the mold shown in fig. 1. S1: placing a prefabricated plate blank 20 of aluminum alloy, carbon steel or stainless steel into a cavity of a special-shaped tank body forming die 10, and sealing the plate blank 20 by an axial punch to ensure that the plate blank is airtight;

s2: then pressing and fixing the forming die 10 by using a hydraulic press for locking;

s3: starting a quick liquid filling machine set to fill liquid into the inner wall of the plate blank, timely supplementing high pressure in the whole tank body bulging process, simultaneously, inwards pushing the punching heads at the two ends into the supplemented blank, bulging the plate blank 20 to be attached to the forming die 10 without gaps under the combined action of internal pressure and axial force, and thus obtaining the required appearance shape;

s5: after the bulging formed cylinder is taken down from the forming die 10, the whole tank body is assembled, the wave-proof plates are positioned and mounted firstly, and after all the wave-proof plates are positioned, mounted and welded, the special bulging sealing heads or dish-shaped sealing heads are positioned and mounted before and after the positioning and mounting.

The length of the plate blank 20 in the S1 is set to be 3-10 meters;

the high pressure supplemented in the step S2 is 50-150MPa.

The method comprises the steps that a special hydraulic bulging software is firstly required to simulate the whole forming process before machining, the stress-strain relation of materials, the influence of the elongation rate, the hardening index n, the opposite coefficient r, the wall thickness t/d, the wall thickness deviation and the limit bulging coefficient k of the materials on forming are related to the materials, more beneficial guarantee is provided for a later-stage formulation process scheme and forming control, and the method is applied to a hydraulic press, a large-scale quick liquid filling unit, a high-pressure liquid filling unit, a quick liquid discharging unit, a control unit and a sealing device (axial punch) in forming machining;

the forming principle of the special-shaped tank body forming die is that the transverse section and the longitudinal section of the tank body are arc-shaped, and the edges of the tank body are arc-shaped patterns which are smoothly connected.

the tank body is expanded to form a structural style by applying liquid pressurization to the interior of the welded plate blank, the tank body is subjected to strain strengthening treatment by applying strengthening pressure at room temperature, the tank body is subjected to overall plastic deformation after the pressure is unloaded, and the tank body with a stable structure is achieved.

Second embodiment

Referring to fig. 4, fig. 6, fig. 7 and fig. 8 in combination, another liquid tank bulging process is proposed in accordance with a second embodiment of the present application based on the liquid tank bulging process provided in the first embodiment of the present application. The second embodiment is merely a preferred manner of the first embodiment.

Specifically, the liquid tank bulging forming process provided by the second embodiment of the present application is different in that the liquid tank bulging forming process adopts a longitudinal annular seam automatic welding mode, and uses a carbon dioxide protection welding mode, and single-sided welding and double-sided forming are performed, and meanwhile, a gasket is added on the back of a welding seam so as to force the welding seam to form, so that the manufacturing precision and the production efficiency of the method are higher, and the production efficiency and the welding quality are greatly improved; meanwhile, the improvement of the welding process improves the working environment of constructors;

when the tank bodies with different specifications are produced, only the special-shaped tank body forming die needs to be replaced, and the cost is relatively low, so that the method has better adaptability and is particularly suitable for middle and small enterprises.

Third embodiment

Referring to fig. 7 and 9 in combination, another liquid tank bulge forming apparatus is provided according to a third embodiment of the present application based on the liquid tank bulge forming apparatus provided according to the first embodiment of the present application. The second embodiment is merely a preferred manner of the first embodiment, and implementation of the third embodiment does not affect the implementation of the first embodiment alone.

In particular, the third embodiment of the present application provides a liquid tank bulge forming apparatus which differs in that,

liquid is filled into the plate blank and is conveyed through a conveying pipe fitting during liquid discharge, the conveying pipe fitting is mounted at the end part of the die 10 and comprises a main pipe 11, one end of the main pipe 11 is fixedly connected with a telescopic pipe 12, one end of the telescopic pipe 12 is fixedly connected with a positioning ring 13, and one side of the positioning ring 13 is adhered with a magnetic block 14.

The bellows 12 is preferably of deformable plastics material and is provided with alternating annular formations on its surface with convex folds transverse to the concave folds.

The other end of the main pipe 11 is provided with a flange 15, one side of the flange 15 is fixedly connected with a sealing ring 16 on the surface of the main pipe 11, and a filling gap 17 is reserved between the sealing ring 16 and the main pipe 11.

One side of the flange 15 is connected with a fixing ring 22, and one side of the fixing ring 22 is fixedly connected with a four-way pipe 7 through a positioning piece 6.

Through setting up four-way pipe 7 can be respectively through pipeline and large-scale quick liquid filling unit, high pressure liquid replenishing unit, quick flowing back unit connection, and set up the valve on the pipeline, the valve and the equipment on it are opened according to the use needs.

The end fixedly connected with screw thread axle 3 of mould, the fixed surface of screw thread axle 3 is connected with screw thread mounting 4, screw thread mounting 4 includes star nut 41, rectangular hole 42 has been seted up to one side of star nut 41, mould 10 internally connected with sealed packing piece 2, sealed packing piece 2 includes sealed section of thick bamboo 21, the inside that one end of sealed section of thick bamboo 21 extends to annotate liquid hole 30, the outside and the inboard of sealed section of thick bamboo 21 all bond and have cushion 23.

The four screw shafts 3 are correspondingly arranged, the four screw shafts are correspondingly arranged with the mounting holes on the flange plate 15, the sum of the thickness values of the sealing cylinder 21 and the two rubber pads 23 is slightly larger than the height value of the filling gap 17, one end of the sealing cylinder 21 is provided with a fixing ring 22, and the fixing ring is fixed in the die 10.

One end of the four-way pipe 7 is provided with a connecting flange 5, the connecting flange 5 comprises a connecting ring 51, one side of the connecting ring 51 is adhered with a sealing ring 53, the connecting ring 51 is provided with a fixing hole 54, and the surface of the connecting ring 51 is connected with an L-shaped positioning piece 52.

Four L-shaped positioning members 52 are provided correspondingly, wherein the cross-sectional size of the L-shaped positioning members 52 is the same as that of the rectangular holes 42.

An annular sealing groove is arranged on one side of the fixed ring 22

The annular sealing groove and the sealing ring 53 are the same in size, and the sealing ring 53 is embedded in the annular sealing groove to ensure sealing.

After the plate blank 20 is placed in the forming die 10, the telescopic pipe 12 is correspondingly plugged into the plate blank 20 through the liquid injection hole 30, and after the telescopic pipe 12 enters the plate blank 20, the positioning ring 13 at the end part and the magnetic block 14 automatically slide downwards due to the gravity of the magnetic block 14, and the magnetic block 14 is adsorbed to the plate blank 20, so that the end part of the telescopic pipe 12 is in contact with the bottom of the interior of the plate blank 20;

therefore, when liquid is pumped out from the interior of the plate blank 20, the bottom end of the telescopic pipe 12 is positioned at the bottom of the plate blank 20, so that the liquid in the interior can be completely discharged, and meanwhile, the purposes of adding liquid and pressurizing the interior of the plate blank 20 can be met, and the use is convenient.

The main pipe 11 and the forming die 10 are simply installed, the installation hole on the flange 15 is sleeved with the corresponding threaded shaft 3 during installation, then the main pipe 11 is screwed by the star nut 41, meanwhile, when the main pipe 11 extends into the forming die 10, the sealing cylinder 21 is correspondingly inserted into the filling gap 17 formed between the sealing ring 16 and the main pipe 11, and the sealing ring 16 is continuously extruded, so that the sealing ring 16 and the rubber pad 23 on the surface of the sealing ring 16 are tightly attached to the inner walls of the main pipe 11 and the liquid injection hole 30, the sealing performance can be improved, and the forming quality of the plate blank 20 is improved;

when one end of the four-way pipe 7 is connected with the positioning ring 13 at one end of the main pipe 11, the ends of the four L-shaped positioning pieces 52 are correspondingly inserted into the rectangular holes 42 on the star nut 41, so that the star nut 41 can be prevented from axially rotating, the star nut 41 can be matched with the threaded shaft 3 to fix and stabilize the main pipe 11, and the star nut 41 can be screwed up manually without tools, so that the use is more convenient, and when the star nut 41 is screwed up, the rectangular hole positions correspond to the front view of the L-shaped positioning pieces 52 in the figure 6;

the positioning piece 6 comprises a fixed shaft 61, an annular groove is formed in the surface of one end of the fixed shaft 61, an annular cylinder 63 is sleeved on the surface of the fixed shaft 61 and positioned in the annular groove 62, a spring 64 is arranged in the annular cylinder 63, the inner side end of the spring 64 is fixedly connected with the fixed shaft 61, the outer side end of the spring 64 is fixedly connected with the annular cylinder 63, limiting blocks 67 are symmetrically and fixedly connected with the surface of the annular cylinder 62, limiting cavities 65 are symmetrically arranged on one side of the annular cylinder 63, and stop blocks 66 are symmetrically arranged on one side of the inner wall of the annular groove 62;

the fixing hole 54 comprises a circular hole, and strip-shaped holes are correspondingly formed on two sides of the inner wall of the circular hole.

When the four-way pipe 7 is connected with the main pipe 11, the position of the limiting block 67 is firstly adjusted, ninety degrees are turned, meanwhile, the annular cylinder 63 pulls the spring 64 to enable the spring 64 to shrink, at the moment, two limiting cavities 65 at one end of the annular cylinder 63 correspond to the stop blocks 66, at the moment, the annular cylinder 63 is pulled forwards to enable the limiting cavities 65 to be sleeved on the stop blocks 66, at the moment, the other three locating pieces 6 are operated, at the moment, when the circular holes on the fixing holes 54 on the connecting flange 5 on the four-way pipe 7 are correspondingly sleeved on the fixing shafts 61, at the moment, the strip-shaped holes at the two sides of the fixing holes 54 correspond to the limiting blocks 67, after the limiting blocks 67 penetrate through the strip-shaped holes, at the moment, the annular cylinder 63 is pushed inwards to enable the limiting cavities 65 to be separated from the stop blocks 66, at the moment, the limiting blocks 67 are driven to return to the original positions through the action of the spring 64, at the moment are staggered with the strip-shaped holes, so that the fixing is achieved, the mounting and dismounting operation is simple and convenient, vibration looseness can be realized, the fixing is stable, and tools are not needed, at the moment, and the sealing ring 53 is tightly attached to the inner wall of the annular sealing groove.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A liquid tank bulge forming apparatus comprising the steps of:

s5: taking down the bulging formed cylinder body from the forming die, then assembling the whole tank body, firstly positioning and installing the wave-proof plates, positioning, installing and welding all the wave-proof plates, and finally positioning and installing the front and rear special bulging sealing heads or the dished sealing heads;

the device comprises a plate blank, a mold, a liquid conveying pipe, a positioning ring, a magnetic block, a main pipe, a telescopic pipe, a positioning ring, a magnetic block and a magnetic block, wherein the liquid is filled into the plate blank and conveyed through the conveying pipe when the liquid is discharged, the conveying pipe is arranged at the end part of the mold, the conveying pipe comprises the main pipe, one end of the main pipe is fixedly connected with the telescopic pipe, one end of the telescopic pipe is fixedly connected with the positioning ring, and the magnetic block is adhered to one side of the positioning ring;

the other end of the main pipe is provided with a flange, a sealing ring is fixedly connected to one side of the flange and the surface of the main pipe, and a filling gap is reserved between the sealing ring and the main pipe;

one side of the flange plate is connected with a fixed ring, and one side of the fixed ring is fixedly connected with a four-way pipe through a positioning piece;

the end part of the die is fixedly connected with a threaded shaft, the surface of the threaded shaft is fixedly connected with a threaded fixing piece, the threaded fixing piece comprises a star nut, a rectangular hole is formed in one side of the star nut, a sealing filling piece is connected inside the die and comprises a sealing cylinder, one end of the sealing cylinder extends to the inside of the liquid injection hole, and rubber gaskets are adhered to the outer side and the inner side of the sealing cylinder;

one end of the four-way pipe is provided with a connecting flange, the connecting flange comprises a connecting ring, one side of the connecting ring is adhered with a sealing ring, the connecting ring is provided with a fixing hole, and the surface of the connecting ring is connected with an L-shaped positioning piece;

the locating part includes the fixed axle, annular groove has been seted up on the surface of fixed axle one end, the surface of fixed axle just is located annular groove's inside cover and is equipped with annular cylinder, the inside of annular cylinder is provided with the clockwork spring, the inboard end and the fixed axle fixed connection of clockwork spring, the outside end of clockwork spring with annular cylinder fixed connection, annular cylinder's surface symmetry fixedly connected with stopper, annular cylinder's one side symmetry is provided with spacing chamber, annular groove inner wall's one side symmetry is provided with the dog.

2. A liquid tank bulge forming apparatus according to claim 1, wherein the length of the S1 sheet blank is set to 3-10 meters.

3. The liquid tank bulge forming apparatus of claim 1, wherein the high pressure supplemented in S2 is between 50 and 150MPa.

4. The liquid tank bulge forming apparatus of claim 1, wherein one side of the fixing ring is provided with an annular sealing groove.

5. A liquid tank bulging forming process for a liquid tank bulging forming apparatus according to any one of claims 1 to 4, wherein the tank assembly welding adopts a longitudinal girth automatic welding mode, and a carbon dioxide protection welding mode is used, and a gasket is added on the back of the welding seam.