CN111390004A - A hydraulic booster - Google Patents

Abstract

The invention discloses a hydraulic pressurizing device, which relates to the technical field of internal high-pressure bulging machines. The invention is applied to the water bulging process, and solves the problem that a large amount of air will accumulate at the high position of the injection device due to the action of gravity and cannot be normally discharged from the injection device. The problem of flow out of the injection device, which affects the quality of the bulging parts, the main point of the technical solution is that it includes an injection cylinder and a booster cylinder. The booster cylinder is provided with a piston rod, and the injection cylinder is provided with an injection rod. The injection cylinder and the booster cylinder are arranged vertically; the injection cylinder is provided with a main pipe; the injection rod is provided with a circulation channel, one end of the circulation channel is connected with the main pipe, and the other end extends outside the cylinder of the injection cylinder And through the circumference of the injection rod, a medium outlet is formed, so that the air mixed in the medium can be smoothly discharged along the circulation channel through the medium outlet, and the common problem of air mixed in the injection cylinder medium is difficult to exhaust.

Description

A hydraulic booster

technical field

The invention relates to the technical field of internal high-pressure bulging machines, in particular to a hydraulic pressure booster.

Background technique

Internal high pressure forming, also known as hydroforming or hydraulic forming, is a material forming process that uses liquid as a forming medium to achieve the purpose of forming hollow parts by controlling internal pressure and material flow. It is widely used in automobile, aviation and aerospace manufacturing fields, especially in automobile production, such as car subframe, dashboard bracket, rear subframe reinforcement tube, SUV longitudinal arm, subframe trailing arm and wishbone, hot end In the processing of exhaust manifolds and other parts, the internal high pressure hydroforming process is gradually used to replace the traditional processing technology.

Most of the existing swell forming equipment for internal high pressure forming is set up horizontally, but after a long time of use, since each component has a certain weight in the horizontal setting method, it is easy to cause deviation after long-term use. caused wear. Moreover, when the water tank supplements the bulging medium into the injection cylinder, air is often mixed in the medium, and the inner cavity of the injection cylinder and the outer wall of the injection rod are sealed by a high-pressure seal. When the high-pressure seal fails due to loss, the air is also It will enter the inner cavity of the injection cylinder from the gap between the injection cylinder and the injection rod, but at this time, since the injection device is arranged horizontally, a large amount of air will spread to the high position of the injection device due to the action of gravity, so it cannot be normally discharged from the injection cylinder. The outflow from the injection device will affect the quality of the bulging process and the life of the bulging mold, which will easily cause the failure of the machine.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a hydraulic pressure boosting device applied to the water bulging forming process, so as to solve the problem that air is mixed in the common injection cylinder medium and is difficult to exhaust.

The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a hydraulic pressure boosting device, comprising an injection cylinder and a pressure boosting cylinder arranged oppositely, and the pressure boosting cylinder is provided with a reciprocating motion along its own axial direction. The injection cylinder is provided with an injection rod that can reciprocate along its own axis, and the injection rod is connected with the piston rod; the injection cylinder and the booster cylinder are arranged vertically, and the increase The pressure cylinder is located above the injection cylinder; the injection cylinder is provided with a general pipeline connected to the inside of the injection cylinder; a circulation channel is opened in the injection rod, one end of the circulation channel is communicated with the general pipeline, and the other One end extends to the outside of the injection cylinder and runs through the circumference of the injection rod to form a medium outlet.

By adopting the above technical solution, the circulation channel arranged in the injection rod can make the medium outlet at the high position of the injection cylinder, so that the air mixed in the medium can be smoothly discharged along the circulation channel through the medium outlet. Secondly, the overall structure of the whole device is simple and convenient for production.

According to a further arrangement of the present invention, a first pipeline for inputting the bulging medium is opened on the peripheral side of the injection cylinder, and the first pipeline is communicated with the main pipeline.

According to a further arrangement of the present invention, a third pipe for discharging bulging medium is opened on the side wall of the injection rod close to the booster cylinder, one end of the third pipe is communicated with the circulation channel, and the other end is open.

A further configuration of the present invention includes a first mounting plate, the injection cylinder is arranged on the first mounting plate, and the first mounting plate is provided with a number of several and circumferentially arranged around the central axis of the injection cylinder A pull rod, the end of the pull rod away from the first mounting plate is fixedly provided with a second mounting plate, and the booster cylinder is disposed on the second mounting plate.

By adopting the above technical solution, the injection cylinder is installed on the second mounting plate, and the inner space enclosed by the four tie rods is larger than the outer diameter of the injection cylinder. During maintenance, only the injection cylinder needs to be removed from the injection cylinder on the second mounting plate. Pull out from the positioning step, and the injection cylinder can be removed from the air in the tie rod, which not only greatly reduces the maintenance difficulty, but also greatly reduces the maintenance cost, and avoids the similar existing injection cylinder being installed through the second mounting plate. When replacing the injection cylinder, the injection cylinder needs to be pulled out from the injection cylinder mounting plate, and the injection cylinder itself has a large weight, which greatly increases the difficulty of maintenance.

According to a further arrangement of the present invention, the end of the piston rod is provided with a connecting portion, and the injection rod is connected to the piston rod after passing through the connecting portion.

According to a further arrangement of the present invention, there is a space between the boosting cylinder and the injection cylinder.

By adopting the above technical solution, due to the weight of the device components in the conventional horizontal arrangement, the eccentricity and non-axial problems of the injection cylinder and the injection rod, as well as the reciprocation process of the booster cylinder and the piston rod, are prone to occur after long-term use, and further It will cause serious wear and tear of the machine, and will reduce the service life of the machine after long-term use. By adopting the above technical solution, the design of the vertical arrangement of the injection device (injection cylinder and injection rod) and the pressurization device (injection cylinder and piston rod) can effectively overcome the above problems.

The conventional booster cylinder and injection cylinder are set in one piece, and the two are generally separated by seals. Therefore, when the medium of the booster cylinder is inconsistent with the medium of the injection cylinder, the media in the two cylinders are prone to mutual interaction. Contamination will greatly reduce the service life of the machine after long-term use. In this scheme, the open end of the third pipe is set within the distance between the booster cylinder and the injection cylinder, so the third pipe can also be used to distribute the air in the circulation pipe. The reason for the space between the pressure cylinder and the injection cylinder can isolate the medium of the booster cylinder and the medium of the injection cylinder from each other. Therefore, the medium in the injection cylinder and the booster cylinder of this scheme can be of the same type or different. type, and then it is convenient to improve the application scope of this scheme.

According to a further arrangement of the present invention, the peripheral side of the connecting portion is provided with a stroke slide plate extending to the peripheral side of the second mounting plate, the second mounting plate is provided with a chute through which the stroke slide plate can slide, and the stroke The sliding plate is slidably connected in the chute.

According to a further arrangement of the present invention, a pulley block arranged along the axial direction of the chute is arranged in the chute, and the travel slide plate and the pulley block are rollingly connected.

By adopting the above technical solution, when the piston rod reciprocates in the pressurized cylinder, the stroke slide plate also rolls reciprocatingly along the vertical direction on the pulley block in the chute. In order to reduce the self-rotation during the movement of the piston rod, the reciprocating motion of the piston rod is more regular and stable, and the service life of the machine is improved. The pulley group is divided into two groups, and they are clamped on both sides of the travel slide plate, so as to reduce the loss during the sliding process.

According to a further arrangement of the present invention, the peripheral side of the injection cylinder is provided with several clamping grooves that are evenly distributed around its central axis, and the first mounting plate is provided with a number of pressing blocks matching the clamping grooves. The pressing block is inserted and clamped in the card slot.

By adopting the above technical solution, the efficiency of the installation and removal of the injection cylinder on the first installation plate is improved through the clamping action between the clamping groove and the pressing block.

According to a further arrangement of the present invention, the piston rod includes a coaxially arranged rod body and a spacer block, the spacer block is detachably mounted on the end of the rod body, and the spacer block is slidably connected to the booster along the axial direction of the booster cylinder. In the pressure cylinder, the spacer is connected with the injection rod.

By adopting the above technical solution, when replacing the seal of the injection cylinder, the spacer can be removed, the seal of the injection cylinder can be replaced, and then the spacer can be replaced, eliminating the need to lift the booster cylinder to a certain height in the past to replace the seal of the injection cylinder In the process of replacement, it can greatly save maintenance time and reduce maintenance costs.

To sum up, the present invention has the following beneficial effects:

1. The medium outlet is at the high position of the injection cylinder, and the air mixed in the medium can be smoothly discharged along the circulation channel through the medium outlet, which can solve the problem that the common injection cylinder medium is difficult to exhaust due to mixed air;

2. The injection device and the booster device are arranged vertically, which can effectively alleviate the problem of eccentricity in the process of reciprocating activities, thereby facilitating the improvement of the service life of the machine;

3. The medium of the booster cylinder and the medium of the injection cylinder can be isolated from each other, so as to improve the scope of application;

4. It is convenient to reduce the rotation of the piston rod during the movement process, so that the reciprocating motion of the piston rod is more regular and stable, and it is convenient to improve the service life of the machine.

In general, the present invention can solve the problem that the common injection cylinder medium is difficult to exhaust due to mixed air, so that the air mixed in the medium can be smoothly discharged along the circulation channel through the medium outlet.

Description of drawings

Fig. 1 is the structural representation of this embodiment;

FIG. 2 is a schematic structural diagram of another perspective of the present embodiment;

Fig. 3 is the top view of this embodiment;

FIG. 4 is a schematic view of the half-section structure of the A-A plane of FIG. 3 .

Reference numerals: 1, first mounting plate; 2, injection cylinder; 3, injection rod; 4, booster cylinder; 5, piston rod; 51, rod body; 52, spacer; ; 8, the first pipe; 10, the third pipe; 11, the pull rod; 12, the second mounting plate; 13, the connecting part; 14, the spacing; 15, the travel slide plate; 16, the chute; Slot; 19, briquetting.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment: a hydraulic pressure boosting device, as shown in Figures 1 to 4, includes an injection cylinder 2 and a booster cylinder 4 that are oppositely arranged, and the booster cylinder 4 is provided with a piston that can reciprocate along its own axis. Rod 5, the injection cylinder 2 is provided with an injection rod 3 that can reciprocate along its own axis, and the injection rod 3 is connected with the piston rod 5; the injection cylinder 2 and the booster cylinder 4 are arranged vertically, and the booster cylinder 4 It is located above the injection cylinder 2; the injection cylinder 2 is provided with a general pipeline 7 connected to the interior of the injection cylinder 2; the injection rod 3 is provided with a circulation channel 6, one end of the circulation channel 6 is communicated with the general pipeline 7, and the other end extends to the injection The outside of the cylinder 2 and the circumferential direction of the injection rod 3 are formed to form a medium outlet.

The circulation channel 6 arranged in the injection rod 3 can make the medium outlet at the high position of the injection cylinder 2, and the air mixed in the medium can be smoothly discharged along the circulation channel 6 through the medium outlet. Secondly, the overall structure of the whole device is simple and convenient for production.

The peripheral side of the injection cylinder 2 is provided with a first pipeline 8 for inputting the bulging medium, and the first pipeline 8 communicates with the general pipeline 7 . The side wall of the injection rod 3 close to the booster cylinder 4 is provided with a third pipe 10 for discharging the bulging medium.

This embodiment also includes a first mounting plate 1, the injection cylinder 2 is arranged on the first mounting plate 1, the first mounting plate 1 is provided with a number of tie rods 11 arranged in a circle around the central axis of the injection cylinder 2, A second mounting plate 12 is fixedly disposed on one end of the pull rod 11 away from the first mounting plate 1 , and the booster cylinder 4 is disposed on the second mounting plate 12 .

The first mounting plate 1 of the injection cylinder 2, and the internal space enclosed by the four tie rods 11 is larger than the outer diameter of the injection cylinder 2. During maintenance, only the injection cylinder 2 needs to be positioned from the injection cylinder 2 on the first mounting plate 1. Step The injection cylinder 2 can be removed from the tie rod 11 in the air, which not only greatly reduces the maintenance difficulty, but also greatly reduces the maintenance cost, and avoids the prior art that the injection cylinder 2 is installed through the first When the injection cylinder 2 is installed on the installation plate 1, the injection cylinder 2 needs to be pulled out from the injection cylinder 2 installation plate when the injection cylinder 2 is replaced, and the injection cylinder 2 itself has a large weight, which greatly increases the maintenance difficulty.

The end of the piston rod 5 is provided with a connecting portion 13 , and the injection rod 3 is connected to the piston rod 5 after passing through the connecting portion 13 . A distance 14 is left between the booster cylinder 4 and the injection cylinder 2 .

Due to the weight of the device components, the conventional horizontal arrangement is prone to eccentricity and non-axial problems during the reciprocating movement of the injection cylinder 2 and the injection rod 3, as well as the booster cylinder 4 and the piston rod 5 after long-term use, which leads to the machine The wear and tear is serious, and the service life of the machine will be reduced after long-term use. By adopting the above technical solution, the design of the vertical arrangement of the injection device (injection cylinder 2 and injection rod 3) and the booster device (injection cylinder 4 and piston rod 5) can effectively overcome the above problems.

In addition, the conventional booster cylinder 4 and the injection cylinder 2 are set in one piece, and the two are generally separated by a seal. Therefore, when the medium of the booster cylinder 4 is inconsistent with the medium of the injection cylinder 2, the two cylinders will be separated from each other. The medium is prone to mutual contamination, which will greatly reduce the service life of the machine after long-term use. In this solution, the open end of the third pipe 10 is arranged in the distance 14 between the booster cylinder 4 and the injection cylinder 2, so the third pipe 10 can also be used to distribute the air in the circulation pipe. Secondly, Due to the distance 14 between the booster cylinder 4 and the injection cylinder 2 in this scheme, the medium of the booster cylinder 4 and the medium of the injection cylinder 2 can be isolated from each other. Therefore, the injection cylinder 2 and the booster cylinder 4 of this scheme can be isolated from each other. The medium inside can be of the same type or of different types, thereby facilitating the improvement of the application range of the solution.

The peripheral side of the connecting portion 13 is provided with a stroke slide plate 15 extending to the peripheral side of the second mounting plate 12. The second mounting plate 12 is provided with a chute 16 through which the stroke slide plate 15 can slide. in slot 16. A pulley block 17 is arranged in the chute 16 along the axial direction of the chute 16 , and the travel slide 15 is connected with the pulley block 17 in a rolling connection.

When the piston rod 5 reciprocates in the booster cylinder 4, the stroke slide plate 15 also rolls back and forth along the vertical direction on the pulley block 17 in the chute 16. On the pulley block 17, in order to reduce the situation of autorotation during the movement of the piston rod 5, so that the reciprocating motion of the piston rod 5 is more regular and stable, and it is convenient to improve the service life of the machine. The pulley group 17 is divided into two groups, and they are clamped on both sides of the travel slide plate 15 respectively, so as to reduce the loss during the sliding process.

The peripheral side of the injection cylinder 2 is provided with a number of clamping grooves 18 evenly distributed around its central axis. in the card slot 18. Through the clamping action between the clamping groove 18 and the pressing block 19 , it is convenient to improve the installation and removal efficiency of the injection cylinder 2 on the first installation plate 1 .

The piston rod 5 includes a coaxially arranged rod body 51 and a spacer block 52. The spacer block 52 is detachably mounted on the end of the rod body 51, and the spacer block 52 is slidably connected to the supercharger cylinder 4 along the axial direction of the supercharger cylinder 4. The spacer 52 is connected to the injection rod 3 .

When replacing the seal of injection cylinder 2, the spacer block 52 can be removed, replaced the seal of injection cylinder 2 and then put back the spacer block 52, eliminating the need to lift the booster cylinder 4 to a certain height in the past to replace the seal of injection cylinder 2 In the process of replacement, the maintenance time can be greatly saved, and the maintenance cost can be reduced.

This specific embodiment is only an explanation of the present invention, and it does not limit the present invention. Those skilled in the art can make modifications without creative contribution to the present embodiment as required after reading this specification, but as long as the rights of the present invention are used All claims are protected by patent law.

Claims (10)

1. A hydraulic pressurizing device, comprising an injection cylinder (2) and a pressurizing cylinder (4) that are arranged oppositely, and the pressurizing cylinder (4) is provided with a piston rod ( 5), the injection cylinder (2) is provided with an injection rod (3) that can reciprocate along its own axis, and the injection rod (3) is connected with the piston rod (5); it is characterized in that the The injection cylinder (2) and the booster cylinder (4) are arranged vertically, and the booster cylinder (4) is located above the injection cylinder (2); A main pipe (7) inside the cylinder (2); a circulation channel (6) is opened in the injection rod (3), one end of the circulation channel (6) is communicated with the main pipe (7), and the other end extends To the outside of the injection cylinder (2) and through the circumference of the injection rod (3), a medium outlet is formed. 2. A hydraulic booster device according to claim 1, characterized in that, a first pipeline (8) for input of bulging medium is opened on the peripheral side of the injection cylinder (2), and the first pipeline (8) communicates with the main pipe (7). 3. A hydraulic booster device according to claim 1, characterized in that, a third pipe ( 10), one end of the third pipe (10) is communicated with the circulation channel (6), and the other end is open. 4. A hydraulic booster device according to claim 1, characterized in that it comprises a first mounting plate (1), and the injection cylinder (2) is arranged on the first mounting plate (1), so that the The first mounting plate (1) is provided with several tie rods (11) arranged in a circle around the central axis of the injection cylinder (2). A second mounting plate (12) is fixedly arranged at one end, and the booster cylinder (4) is arranged on the second mounting plate (12). 5. A hydraulic booster device according to claim 4, characterized in that the end of the piston rod (5) is provided with a connecting portion (13), and the injection rod (3) passes through the connecting portion ( 13) and then connect with the piston rod (5). 6 . The hydraulic pressure boosting device according to claim 5 , wherein a distance ( 14 ) is left between the boosting cylinder ( 4 ) and the injection cylinder ( 2 ). 7 . 7. A hydraulic pressure booster device according to claim 5, characterized in that, the peripheral side of the connecting portion (13) is provided with a stroke slide plate (15) extending to the peripheral side of the second mounting plate (12), The second mounting plate (12) is provided with a chute (16) through which the travel slide (15) can slide, and the travel slide (15) is slidably connected in the chute (16). 8 . The hydraulic pressure boosting device according to claim 7 , wherein a pulley block ( 17 ) is arranged in the chute ( 16 ) axially along the chute ( 16 ), and the travel slide plate (15) is rollingly connected with the pulley block (17). 9. A hydraulic booster device according to claim 4, characterized in that, a plurality of clamping grooves (18) uniformly distributed around its central axis are provided on the peripheral side of the injection cylinder (2), so that The first mounting plate (1) is provided with pressing blocks (19) matching the number of the card slots (18), and the pressing blocks (19) are inserted and clamped in the card slots (18). 10. A hydraulic pressure booster device according to claim 1, characterized in that, the piston rod (5) comprises a rod body (51) and a spacer (52) coaxially arranged, and the spacer (52) It is detachably mounted on the end of the rod body (51). The injection rod (3) is connected.

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