Gas supercharging equipment and system for gas high-pressure forming

Abstract

A gas supercharging device and system for gas high-pressure forming mainly comprises a cylinder body, the cylinder body is divided into a gas cavity and an oil cavity, pistons are arranged in the gas cavity and the oil cavity, the two pistons are fixedly connected through a piston rod, and a sealing ring is arranged between each piston and the cylinder body; the separation part of the air cavity and the oil cavity is hermetically connected with the piston rod; a one-way air outlet valve connector and a one-way air inlet valve connector are arranged at the end, away from the oil cavity, of the air cavity. A hydraulic oil return opening is formed in one end, close to the air cavity, of the oil cavity, and a hydraulic oil inlet is formed in one end, away from the air cavity, of the oil cavity; according to the gas supercharging equipment and system for gas high-pressure forming, high-pressure gas is adopted as a forming medium, pollution is low, and the working environment cannot be affected; the gas supercharging equipment is simple in structure and low in cost; the whole system loop is not complex, the occupied area is small, the adjustable range of output air pressure is large, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the field of mechanical equipment manufacturing, and specifically relates to a gas boosting device and system for gas high-pressure forming. Background Art

[0002] Sheet metal forming and tube forming products are widely used in the field of automotive structural parts, especially in the body and chassis. Sheet metal forming, that is, the stamping forming products we mentioned, generally has many processes, low material utilization rate, and high energy consumption. Tube forming, although it has fewer processes and high utilization rate, if high-precision products are to be obtained, internal high-pressure forming must be used. Internal high-pressure forming, also called hydroforming or hydrodynamic forming, is a material forming process that uses liquid as the forming medium to achieve the purpose of forming hollow parts by controlling the internal pressure and material flow. After the pipe fitting is placed in the lower die of the press and the upper die is closed to form a die cavity, the pipe fitting is then subjected to a bulging treatment using the forming medium. The forming medium is cutting fluid (with a low compression ratio and anti-rust effect), but cutting fluid is a highly polluting substance and will cause an extremely poor working environment, and it is less efficient compared to sheet metal forming.

[0003] Therefore, how to improve the material forming utilization rate, reduce processes, and at the same time save energy and be environmentally friendly and efficient is a problem worthy of our consideration. Summary of the Invention

[0004] The purpose of the present invention is to provide a gas boosting device and system for gas high-pressure forming, which uses pollution-free high-pressure gas to perform internal high-pressure forming treatment on the workpiece in the die cavity; compared with the traditional internal high-pressure treatment process using cutting fluid as the medium, it has almost no pollution and will not affect the working environment.

[0005] The technical solution of the present invention is as follows: A gas boosting device for gas high-pressure forming, including a cylinder block, the cylinder block is divided into two parts: a gas chamber and an oil chamber. Pistons are provided in both the gas chamber and the oil chamber, and the two pistons are fixedly connected by a piston rod. A sealing ring is provided between each piston and the cylinder block; The dividing part between the gas chamber and the oil chamber is hermetically connected to the piston rod; One end of the gas chamber away from the oil chamber is provided with a one-way air outlet valve interface and a one-way air inlet valve interface; One end of the oil chamber close to the gas chamber is provided with a hydraulic oil return port, and the end away from the gas chamber is provided with a hydraulic oil inlet port.

[0006] Further, the cylinder block is divided into a gas chamber and an oil chamber by a connecting flange.

[0007] Further, gland covers are fixedly arranged at both ends of the cylinder block. A pull rod is arranged between each gland cover and the connecting flange. The pull rod is connected to the gland cover by a super bolt, and the pull rod is connected to the connecting flange by a different-thread inner diameter.

[0008] Further, a pressure sensor interface is arranged at one end of the air chamber away from the oil chamber, and a displacement sensor interface is arranged at one end of the oil chamber away from the air chamber.

[0009] A system for gas high-pressure forming includes an ultra-high pressure air compressor, a first ultra-high pressure gas storage tank, a second ultra-high pressure gas storage tank, and a press. It also includes a gas boosting device for gas high-pressure forming as described in claim 4. An outlet check valve is arranged at the one-way outlet valve interface of the gas boosting device for gas high-pressure forming, and an inlet check valve is arranged at the one-way inlet valve interface. Gas path block segments are arranged at both ends of the first ultra-high pressure gas storage tank, both ends of the second ultra-high pressure gas storage tank, and the outlet end of the one-way outlet valve interface. A gas path block main block is arranged at the inlet end of the press cavity. Among them, the gas path block segments located at the bottom end of the first ultra-high pressure gas storage tank are respectively connected to the ultra-high pressure air compressor and the gas path block main block through high-pressure pipelines; the gas path block segments located at the top end of the first ultra-high pressure gas storage tank are respectively connected to the gas path block segments at the top end of the second ultra-high pressure gas storage tank and the one-way inlet valve through high-pressure pipelines; the gas path block segments at the bottom end of the second ultra-high pressure gas storage tank are connected to the gas path block main block through a high-pressure pipeline. The gas path block segments at the outlet end of the one-way outlet valve interface are respectively connected to the gas path block segments at the top end of the second ultra-high pressure gas storage tank and the gas path block main block through high-pressure pipelines. The high-pressure gas generated by the ultra-high pressure air compressor can supply gas to the press or the first ultra-high pressure gas storage tank under the distribution of the gas path block segments located at the bottom end of the first ultra-high pressure gas storage tank. The first ultra-high pressure gas storage tank distributes the gas stored therein to the gas boosting device or the second ultra-high pressure gas storage tank through the path segments at its top end. Among them, the gas distributed to the second ultra-high pressure gas storage tank is only carried out once at the beginning of the system startup, and the remaining gas is all supplied to the gas boosting device to ensure the continuous operation of the gas boosting device. The gas output by the gas boosting device is supplied to the press or the first ultra-high pressure gas storage tank through the gas path block segments at the outlet end of the one-way outlet valve interface. Electrically controlled gas one-way valves are arranged at the inlet and outlet of the gas path block segments and the gas path block main block to prevent gas cross-flow and ensure the independence of each gas path. The gas pressure output by the gas boosting device is obtained through the pressure sensor installed at the pressure sensor interface, and the displacement value of the piston rod is obtained through the displacement sensor installed at the displacement sensor interface.

[0010] Further, the rated pressure of the high-pressure gas output by the ultra-high pressure air compressor is 35 MPa.

[0011] The present invention adopting the above technical solution can bring the following beneficial effects: The gas pressurization equipment and system for gas high-pressure forming provided by the present invention uses high-pressure gas as the forming medium, with low pollution and no impact on the working environment; the gas pressurization equipment has a simple structure and low cost; the entire system circuit is not complex, occupies a small area, has a large adjustable range of output air pressure, and has a wide application range. Description of the Drawings

[0012] Figure 1 is a structural schematic diagram of the gas pressurization equipment of the present invention Figure 1 ;

[0013] Figure 2 is a mechanism schematic diagram of the gas pressurization equipment of the present invention Figure 2 ;

[0014] Figure 3 is a structural schematic diagram of the gas pressurization system of the present invention.

[0015] In the figure, 1 - cylinder block; 2 - air chamber; 3 - oil chamber; 4 - piston rod; 5 - one-way air outlet valve interface; 6 - one-way air inlet valve interface; 7 - hydraulic oil return port; 8 - hydraulic oil inlet port; 9 - connecting flange; 10 - gland; 11 - tie rod; 12 - super bolt; 13 - special thread inner diameter; 14 - pressure sensor interface; 15 - displacement sensor interface; 16 - air circuit block sub-block; 17 - air circuit block main block; 100 - ultra-high pressure air compressor; 110 - first ultra-high pressure gas storage tank; 120 - second ultra-high pressure gas storage tank; 130 - press, 131 - mold cavity. Detailed Embodiments

[0016] As Figures 1-3 shown, a gas pressurization equipment for gas high-pressure forming includes a cylinder block 1, the cylinder block 1 is divided into two parts, an air chamber 2 and an oil chamber 3, pistons are arranged in both the air chamber 2 and the oil chamber 3, the two pistons are fixedly connected by a piston rod 4, and a sealing ring is arranged between each piston and the cylinder block 1; The partition between the air chamber 2 and the oil chamber 3 is hermetically connected to the piston rod 4, so that the oil in the oil chamber 3 cannot enter the air chamber 2; One end of the air chamber 2 away from the oil chamber 3 is provided with a one-way air outlet valve interface 5 and a one-way air inlet valve interface 6, and a one-way air inlet valve and a one-way air outlet valve are correspondingly arranged; One end of the oil chamber 3 close to the air chamber 2 is provided with a hydraulic oil return port 7, and the end far from the air chamber 2 is provided with a hydraulic oil inlet port 8. When hydraulic oil is introduced into the inlet port 8, the piston rod 4 is pushed to move towards the air chamber 2, and the gas in the air chamber 2 is compressed. At the same time, the hydraulic oil above the piston in the oil chamber 3 is discharged through the hydraulic oil return port 7; after completing one gas compression process, it is necessary to supplement gas into the air chamber 2 through a one-way intake valve. The gas pushes the piston rod 4 to move towards the oil chamber 3. At this time, the hydraulic oil return port 7 on the upper side of the piston in the oil chamber 3 replenishes the part on the upper side of the oil chamber piston, and the hydraulic oil on the lower side of the oil chamber piston flows out through the hydraulic oil inlet 8. In one embodiment, the cylinder block 1 is divided into two parts, an air chamber 2 and an oil chamber 3, by a connecting flange 9. The connecting flange 9 can be integrally formed with the cylinder block 1. The advantage of this structure is high overall strength, but there are certain inconveniences in maintenance; therefore, the connecting flange 9 can also be composed of two flange plates connected by bolts. One flange plate is fixedly connected to the cylinder block of the air chamber 2, and the other flange plate is fixedly connected to the cylinder block of the oil chamber 3 to facilitate maintenance.

[0017] In order to further increase the strength of the gas boosting device, gland covers 10 are fixedly arranged at both ends of the cylinder block 1. A pull rod 11 is arranged between each gland cover 10 and the connecting flange 9. The pull rod 11 is connected to the gland cover 10 through a super bolt 12, and the pull rod 11 is connected to the connecting flange 9 through a different-thread inner diameter 13.

[0018] Furthermore, a pressure sensor interface 14 is arranged at one end of the air chamber 2 far from the oil chamber 3, and a pressure sensor is installed in the pressure sensor interface 14 to monitor the pressure of the gas in the air chamber; a displacement sensor interface 15 is arranged at one end of the oil chamber 3 far from the air chamber 2, and a displacement sensor is installed in the displacement sensor interface 15 to monitor the stroke of the piston.

[0019] A system for gas high-pressure forming includes an ultra-high pressure air compressor 100, a first ultra-high pressure gas storage tank 110, a second ultra-high pressure gas storage tank 120, and a press 130. It further includes the aforementioned gas boosting device for gas high-pressure forming. An outlet one-way valve is arranged at the one-way outlet valve interface 5 of the gas boosting device for gas high-pressure forming, and an intake one-way valve is arranged at the one-way intake valve interface 6. The gas pressure output by the gas boosting device is obtained through the pressure sensor installed at the pressure sensor interface 14, and the displacement value of the piston rod is obtained through the displacement sensor installed at the displacement sensor interface 15.

[0020] Both ends of the first ultra-high pressure gas storage tank 110, both ends of the second ultra-high pressure gas storage tank 120 and the outlet end of the one-way gas outlet valve interface 5 are provided with gas circuit blocks 16, and the inlet end of the cavity of the compressor 130 is provided with a gas circuit block 17; through the cooperation of the gas circuit block 16 and the gas circuit block 17, the source of gas supply to the mold cavity 131 of the compressor 130 can be adjusted, and the gas supply sources include three types: a. The ultra-high pressure air compressor 100 directly supplies gas to the mold cavity 131; b. The second ultra-high pressure gas storage tank 120 supplies gas to the mold cavity 131; c. The gas boosting equipment supplies gas to the mold cavity 131.

[0021] When the air force required in the mold cavity 131 is less than the rated pressure output by the ultra-high pressure air compressor 100, air is directly supplied by method a alone. Of course, it also includes combined air supply. The so-called combined air supply depends on the air force pressure required in the mold cavity 131 to determine the combination method. When the air force required in the mold cavity 131 is greater than the rated pressure output by the high pressure air compressor 100 and less than the gas pressure stored in the second ultra-high pressure gas storage tank 120, method a supplies air first and then method b continues; when the air force required in the mold cavity 131 is greater than the gas pressure stored in the second ultra-high pressure gas storage tank 120, method a supplies air first, then method b continues, and finally c completes the air supply; of course, those skilled in the art can reasonably adjust the air supply method and sequence according to actual conditions to maximize the purpose of ensuring continuous production.

[0022] In this embodiment, the specific connection mode of each component is as follows: the gas circuit block 16 located at the bottom end of the first ultra-high pressure gas storage tank 110 is respectively connected to the ultra-high pressure air compressor 100 and the gas circuit block 17 through a high-pressure pipeline; the gas circuit block 16 located at the top end of the first ultra-high pressure gas storage tank 110 is respectively connected to the gas circuit block 16 and the one-way air inlet valve at the top end of the second ultra-high pressure gas storage tank 120 through a high-pressure pipeline; the gas circuit block 16 at the bottom end of the second ultra-high pressure gas storage tank 120 is connected to the gas circuit block 17 through a high-pressure pipeline; The gas circuit block 16 at the outlet end of the one-way gas outlet valve interface 5 is connected to the gas circuit block 16 at the top of the second ultra-high pressure gas storage tank 120 and the gas circuit block 17 through high pressure pipelines; The high-pressure gas generated by the ultra-high pressure air compressor 100 can supply gas to the press 130 or the first ultra-high pressure gas storage tank 110 under the distribution of the gas path block sub-block 16 at the bottom end of the first ultra-high pressure gas storage tank 110. The first ultra-high pressure gas storage tank 110 distributes the gas stored therein to the gas booster equipment or the second ultra-high pressure gas storage tank 120 through the path sub-block 7 at its top end. Among them, the gas distributed to the second ultra-high pressure gas storage tank 120 is only carried out once at the beginning of the system startup, and the remaining gas is all supplied to the gas booster equipment to ensure the continuous operation of the gas booster equipment. That is to say, at the initial startup of the system, both the first ultra-high pressure gas storage tank 110 and the second ultra-high pressure gas storage tank 120 store high-pressure gas equal to the rated pressure output by the ultra-high pressure air compressor 100. After that, the first ultra-high pressure gas storage tank 110 no longer supplies gas to the second ultra-high pressure gas storage tank 120, but the gas booster equipment supplies gas to the second ultra-high pressure gas storage tank 120 until the gas pressure in the second ultra-high pressure gas storage tank 120 reaches the preset value. The gas output by the gas booster equipment is supplied to the press 130 or the first ultra-high pressure gas storage tank 110 through the gas path block sub-block 16 at the outlet end of the one-way air outlet valve interface 5. Electrically controlled gas one-way valves are provided at both the inlet and outlet of the gas path block sub-block 16 and the gas path block main block 17 to prevent gas cross-flow and ensure the independence of each gas path. The pressure sensors, displacement sensors, gas path sub-block 16, gas path main block 17, and the hydraulic system driving the gas booster equipment mentioned in this system are all controlled by the electrical control system, and the electrical control system can be an industrial computer or a PLC controller.

[0023] It should be noted that in this embodiment, the rated pressure of the high-pressure gas output by the ultra-high pressure air compressor 100 is 35 MPa.

[0024] The above is only the preferred specific embodiment of the present invention, but it is not a limitation of the present invention. Any equivalent replacement and modification made by those skilled in the art without departing from the guidance of the present invention shall be regarded as falling within the protection scope of the present invention.

Claims

1. A gas boosting device for gas high-pressure forming, characterized in that: It includes a cylinder block (1), which is divided into two parts: an air chamber (2) and an oil chamber (3). Pistons are arranged in both the air chamber (2) and the oil chamber (3), and the two pistons are fixedly connected by a piston rod (4). A sealing ring is arranged between each piston and the cylinder block (1). The separation between the air chamber (2) and the oil chamber (3) is hermetically connected to the piston rod (4). One end of the air chamber (2) far from the oil chamber (3) is provided with a one-way air outlet valve interface (5) and a one-way air inlet valve interface (6). One end of the oil chamber (3) close to the air chamber (2) is provided with a hydraulic oil return port (7), and one end far from the air chamber (2) is provided with a hydraulic oil inlet port (8).

2. The gas supercharging device for high-pressure gas forming according to claim 1, wherein: The cylinder block (1) is divided into two parts: an air chamber (2) and an oil chamber (3) by a connecting flange (9).

3. The gas boosting device for high-pressure gas forming according to claim 2, characterized in that: Gland covers (10) are fixedly arranged at both ends of the cylinder block (1). A pull rod (11) is arranged between each gland cover (10) and the connecting flange (9). The pull rod (11) is connected to the gland cover (10) by a super bolt (12), and the pull rod (11) is connected to the connecting flange (9) by a different-thread inner diameter (13).

4. The gas pressurization device for high-pressure gas forming according to any one of claims 1-3, characterized in that: One end of the air chamber (2) far from the oil chamber (3) is provided with a pressure sensor interface (14), and one end of the oil chamber (3) far from the air chamber (2) is provided with a displacement sensor interface (15).

5. A system for high-pressure gas forming, characterized in that: It includes an ultra-high pressure air compressor (100), a first ultra-high pressure gas storage tank (110), a second ultra-high pressure gas storage tank (120) and a press (130). It also includes a gas boosting device for gas high-pressure forming as described in claim 4. An air outlet one-way valve is arranged at the one-way air outlet valve interface (5) of the gas boosting device for gas high-pressure forming, and an air inlet one-way valve is arranged at the one-way air inlet valve interface (6). Air circuit block sub-blocks (16) are arranged at both ends of the first ultra-high pressure gas storage tank (110), both ends of the second ultra-high pressure gas storage tank (120) and the outlet end of the one-way air outlet valve interface (5). An air circuit block main block (17) is arranged at the inlet end of the cavity of the press (130). Among them, the air circuit block sub-block (16) at the bottom end of the first ultra-high pressure gas storage tank (110) is connected to the ultra-high pressure air compressor (100) and the air circuit block main block (17) through high-pressure pipelines respectively; the air circuit block sub-block (16) at the top end of the first ultra-high pressure gas storage tank (110) is connected to the air circuit block sub-block (16) at the top end of the second ultra-high pressure gas storage tank (120) and the one-way air inlet valve through high-pressure pipelines respectively; the air circuit block sub-block (16) at the bottom end of the second ultra-high pressure gas storage tank (120) is connected to the air circuit block main block (17) through a high-pressure pipeline. The air circuit block sub-blocks (16) at the outlet end of the one-way air outlet valve interface (5) are connected to the air circuit block sub-block (16) at the top end of the second ultra-high pressure gas storage tank (120) and the air circuit block main block (17) through high-pressure pipelines respectively. The high-pressure gas generated by the ultra-high pressure air compressor (100) can supply gas to the press (130) or the first ultra-high pressure gas storage tank (110) under the distribution of the gas path block sub-block (16) at the bottom end of the first ultra-high pressure gas storage tank (110). The first ultra-high pressure gas storage tank (110) distributes the gas stored therein to the gas booster equipment or the second ultra-high pressure gas storage tank (120) through the path sub-block (7) at its top end. Among them, the gas distributed to the second ultra-high pressure gas storage tank (120) is only carried out once at the beginning of system startup, and the remaining gas is all supplied to the gas booster equipment to ensure the continuous operation of the gas booster equipment; The gas output by the gas booster equipment is supplied to the press (130) or the first ultra-high pressure gas storage tank (110) through the gas path block sub-block (16) at the outlet end of the one-way gas outlet valve interface (5); Electrically controlled gas check valves are provided at both the inlet and outlet of the gas path block sub-block (16) and the gas path block main block (17) to prevent gas cross-flow and ensure the independence between gas paths; The gas pressure output by the gas booster equipment is obtained through the pressure sensor installed at the pressure sensor interface (14), and the displacement value of the piston rod is obtained through the displacement sensor installed at the displacement sensor interface (15).

6. The system for high-pressure gas forming according to claim 5, characterized in that: The rated pressure of the high-pressure gas output by the ultra-high pressure air compressor (100) is 35 MPa.

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