An inner high pressure flanging forming process

Abstract

This invention discloses an internal high-pressure flanging forming process, including the following steps: A. Placing the blank: First, the channel ball is placed at the corresponding lower mold processing station; B. Main cylinder drive: The main cylinder drives the upper mold to move towards the lower mold. After moving to the corresponding position of the lower mold, the main cylinder applies pressure; C. Circulating water replenishment: Water is replenished through the pipes of the water tank to the through hole at the bottom of the channel ball; D. Center cylinder sealing water: During the water replenishment process, the center cylinder moves towards the through hole at the top of the channel ball to achieve low-pressure water sealing; E. Forming: While continuously replenishing water to the channel ball through circulating water, the center cylinder continuously moves towards the interior of the channel ball, generating internal high pressure inside the channel ball, causing it to expand, thereby achieving internal high-pressure forming. The beneficial effects are: This process improves processing efficiency while avoiding issues such as insufficient elongation of some materials, which could lead to cracks or uneven flanging width in the processed product.

Description

Technical Field

[0001] This invention relates to the field of internal high-pressure forming technology, and in particular to an internal high-pressure flanging forming process. Background Technology

[0002] Molding processing technology is an advanced manufacturing technology that has been developed in recent years. It is mainly used for forming hollow tubes. Due to its excellent flexible formability, it can form many complex-structured irregular cross-section tubes.

[0003] However, the most common forming and processing methods on the market are casting, stamping, and mechanical forming. The disadvantages of casting include: difficulty in controlling the forming flow, susceptibility to cracks and porosity, high weight, complex subsequent processing, and a tendency for cracks and deformation during welding. The disadvantages of stamping include: susceptibility to transverse cracks at longitudinal seams, uneven flange width at the pipa-shaped part, and a tendency for wrinkles and tears on the sides. The disadvantages of mechanical forming include: difficulty in controlling the bulging force, complex bulging mechanism and process, and a tendency to crack.

[0004] In summary, during the actual production molding process, it is necessary to minimize costs, ensure mechanical performance, and shorten the research and development cycle as much as possible, which requires new molding processes. Summary of the Invention

[0005] To address the aforementioned shortcomings, the present invention aims to propose an internal high-pressure flanging forming process that can control the bulging force, ensure the flanging width, and reduce processing costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An internal high-pressure flanging forming process includes the following steps: A. Placing the blank: First, the channel ball is placed at the corresponding lower mold processing station; B. Main cylinder drive: The main cylinder drives the upper mold to move towards the lower mold. After moving to the corresponding position of the lower mold, the main cylinder pressurizes, so that the upper mold and the lower mold are completely sealed to achieve the purpose of mold closing; C. Circulating water replenishment: Water is replenished to the bottom through hole of the channel ball through the water tank pipe; D. Center cylinder sealing water: During the water replenishment process, the center cylinder moves towards the top through hole of the channel ball to achieve the purpose of low-pressure water sealing; E. Forming: While continuously replenishing water to the channel ball through circulating water, the center cylinder continuously moves into the interior of the channel ball, so that internal high pressure is generated inside the channel ball, causing the channel ball to expand, thereby achieving internal high-pressure forming.

[0008] Preferably, the above-mentioned internal high-pressure flanging forming process further includes step E. Preventing circulating water leakage: when the water tank pipeline is replenishing water to the channel ball, the channel ball is pressurized by a booster cylinder.

[0009] Preferably, in the above-mentioned internal high-pressure flanging forming process, during step E. preventing circulating water leakage, C. circulating water replenishment and D. central cylinder water sealing are carried out simultaneously.

[0010] Preferably, the above-mentioned internal high-pressure flanging forming process further includes a step pressure detection: used to detect the pressure of the central cylinder and the water tank replenishment pressure.

[0011] Preferably, the above-mentioned internal high-pressure flanging forming process further includes step G. return stroke: after the pressure detection is completed, the pressure booster cylinder and the center cylinder depressurize in sequence, the main cylinder depressurizes, and the upper mold is driven by the main cylinder to complete the return stroke. Finally, the operator takes the processed channel ball out from the lower mold.

[0012] Preferably, in the above-mentioned internal high-pressure flanging forming process, step B. main cylinder drive further includes step B2: during the process of the main cylinder output end driving the upper mold to move downward, when the upper mold moves to a position 20mm above the channel ball to be processed, the main cylinder slows down the mold closing speed of the downward movement.

[0013] Preferably, in the above-mentioned internal high-pressure flanging forming process, during the D. central cylinder water sealing process, the operator can adjust the pressure of the central cylinder to avoid excessive pressure in the central cylinder directly crushing and scrapping the channel ball to be processed.

[0014] Preferably, in the above-mentioned internal high-pressure flanging forming process, the main cylinder performs a pressure relief operation at the end, which can effectively prevent pressure relief in the mold cavities of the upper and lower molds, thereby enabling the main cylinder to achieve the pressure holding function.

[0015] The beneficial effects of this invention are:

[0016] After the channel ball is placed in the corresponding lower mold processing station, the main cylinder drives the upper mold to move towards the lower mold. After moving to the corresponding position of the lower mold, the main cylinder pressurizes, so that the upper mold and the lower mold are completely sealed to achieve the purpose of mold closing. Water is replenished through the pipe of the water tank to the through hole at the bottom of the channel ball. During the water replenishment process, the central cylinder moves towards the through hole at the top of the channel ball to achieve the purpose of low-pressure water sealing. While continuously replenishing water to the channel ball, the central cylinder continuously moves into the inside of the channel ball, so that the internal high pressure is generated inside the channel ball, causing the channel ball to expand, thereby achieving internal high-pressure molding. This process can effectively improve processing efficiency and avoid the problem of insufficient elongation of some materials, which can lead to cracks or deformation of the processed products. It also avoids the problem of uneven flange width and easy wrinkling and tearing on the side during the flange process. Attached Figure Description

[0017] Figure 1 This is a process flow diagram of one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of one embodiment of the present invention. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] like Figure 1 and 2As shown, an internal high-pressure flanging forming process includes the following steps: A. Placing the blank: First, the channel ball is placed at the corresponding lower mold 14 processing station; B. Main cylinder 12 driving: The main cylinder 12 drives the upper mold 13 to move towards the lower mold 14. After moving to the corresponding position of the lower mold 14, the main cylinder 12 pressurizes, so that the upper mold 13 and the lower mold 14 are completely sealed to achieve the purpose of mold closing; C. Circulating water replenishment: Water is replenished through the pipe of the water tank 15 to the through hole at the bottom of the channel ball; D. Center cylinder 16 sealing water: During the water replenishment process, the center cylinder 16 moves towards the through hole at the top of the channel ball to achieve the purpose of low-pressure water sealing; E. Forming: While continuously replenishing water to the channel ball through circulating water, the center cylinder 16 continuously moves into the interior of the channel ball, so that internal high pressure is generated inside the channel ball, causing the channel ball to expand, thereby achieving internal high-pressure forming; First, the channel ball is placed at the corresponding lower mold. At processing station 14, the main cylinder 12 drives the upper mold 13 to move towards the lower mold 14. After moving to the corresponding position of the lower mold 14, the main cylinder 12 applies pressure, completely sealing the upper mold 13 and the lower mold 14 to achieve mold closing. Water is replenished through the pipe of water tank 15 to the through hole at the bottom of the channel ball. During the water replenishment process, the central cylinder 16 moves towards the through hole at the top of the channel ball to achieve low-pressure water sealing. While continuously replenishing water to the channel ball, the central cylinder 16 continuously moves into the interior of the channel ball, generating internal high pressure inside the channel ball, causing it to expand and thus achieving internal high-pressure molding. This process can effectively improve processing efficiency while avoiding cracks or deformations in the processed products due to insufficient elongation of some materials. It also avoids uneven flanging width and easy wrinkling and tearing on the sides during the flanging process.

[0024] The internal high-pressure flanging forming process in this embodiment also includes step F. Preventing circulating water leakage: When the pipeline of water tank 15 is replenishing water to the channel ball, the channel ball is pressurized by the booster cylinder 17.

[0025] In some embodiments of the internal high-pressure flanging forming process, during step E. preventing leakage of circulating water, C. circulating water replenishment and D. sealing water in the central cylinder 16 are carried out simultaneously; this design improves the forming efficiency of the channel ball.

[0026] The internal high-pressure flanging forming process in this embodiment also includes a step pressure detection: used to detect the pressure of the central cylinder 16 and the water replenishment pressure of the water tank 15; through pressure detection, the pressure values ​​supplied by the central cylinder 16 and the water tank 15 can be better controlled, avoiding excessive pressure that could damage the product and reducing the scrap rate.

[0027] The internal high-pressure flanging forming process in this embodiment also includes step G. Return stroke: After the pressure detection is completed, the pressure boosting cylinder 17 and the center cylinder 16 release pressure in sequence, then the main cylinder 12 releases pressure and drives the upper mold 13 to complete the return stroke process. Finally, the operator takes the processed channel ball out from the lower mold 14.

[0028] It is worth noting that step B. driving the main cylinder 12 also includes step B2: during the process of the output end of the main cylinder 12 driving the upper mold 13 to move downward, when the upper mold 13 moves to a position 20mm above the channel ball to be processed, the main cylinder 12 slows down the downward mold closing speed; to avoid the main cylinder 12 driving the upper mold 13 to move too fast and accidentally scratching the channel ball to be processed, the slow mold closing reduces the deviation rate, thereby improving the mold closing accuracy.

[0029] In some embodiments of the internal high-pressure flanging forming process, during the water sealing process of the central cylinder 16, the operator can adjust the pressure of the central cylinder 16 to avoid excessive pressure that directly crushes the channel ball to be processed. Through this design, the operator can adjust the pressure according to the actual processing situation, thereby reducing the scrap rate of the channel ball.

[0030] In the internal high-pressure flanging forming process of this embodiment, the main cylinder 12 performs pressure relief at the end, which can effectively prevent pressure relief in the mold cavities of the upper mold 13 and the lower mold 14, thereby enabling the main cylinder 12 to achieve the pressure holding function. This design allows the channel ball to be placed more stably at the processing station of the lower mold 14, and after the processing of the channel ball is completed, the pressure holding function can better protect it and prevent the channel ball from falling off naturally.

[0031] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. An internal high-pressure flanging forming process, characterized in that: Includes the following steps: A. Placing the blank: First, place the channel ball in the corresponding lower mold processing station; B. Main cylinder drive: The main cylinder drives the upper mold to move towards the lower mold. After moving to the corresponding position of the lower mold, the main cylinder applies pressure to completely seal the upper mold and the lower mold, thus achieving the purpose of mold closing. C. Circulating water replenishment: The process of replenishing water through the pipes in the water tank to the through hole at the bottom of the channel ball; D. Central cylinder water sealing: During the water replenishment process, the central cylinder moves towards the through hole at the top of the channel ball to achieve low-pressure water sealing. E. Molding: When the circulating water supply continuously replenishes the channel ball, the central cylinder continuously moves into the interior of the channel ball, which generates internal high pressure inside the channel ball, causing the channel ball to expand, thereby achieving internal high pressure molding; During step E, preventing circulating water leakage, step C, replenishing circulating water, and step D, sealing the central cylinder, are performed simultaneously. F. Preventing circulating water leakage: During the water replenishment process of the channel ball, the pipeline of the water tank is pressurized by the booster cylinder; It also includes step pressure testing: used to test the pressure of the central cylinder and the water tank replenishment pressure; It also includes step G. Return stroke: After the pressure detection is completed, the booster cylinder and the center cylinder depressurize in sequence, the main cylinder depressurizes, and the upper mold is driven by the main cylinder to complete the return stroke. Finally, the worker takes the processed channel ball out from the lower mold. Step B. The main cylinder drive also includes step B2: During the process of the main cylinder's output end driving the upper mold to move downward, when the upper mold moves to a position 20mm above the channel ball to be processed, the main cylinder slows down the mold closing speed of the downward movement.

2. The internal high-pressure flanging forming process according to claim 1, characterized in that: During the water sealing process of the central cylinder, the operator can adjust the pressure of the central cylinder to prevent excessive pressure from directly crushing and scrapping the channel ball to be processed.

3. The internal high-pressure flanging forming process according to claim 2, characterized in that: The main cylinder performs a pressure relief operation at the end, which can effectively prevent pressure relief in the mold cavities of the upper and lower molds, thereby enabling the main cylinder to achieve the pressure holding function.

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