Internal high-pressure forming device and forming method thereof

Abstract

The invention provides an internal high-pressure forming device and a forming method thereof.The forming device comprises a water expansion mold and further comprises a profiling assembly and a retaining assembly, and the profiling assembly is arranged on the water expansion mold and abuts against the end face of a to-be-machined workpiece clamped in the water expansion mold; the retaining assembly is arranged on the profiling assembly and used for retaining the profiling assembly in the feeding direction of abutting against the workpiece to be machined. By means of the retaining assembly arranged on the profiling assembly, the retaining assembly exerts constraint on the profiling assembly in the feeding direction in the water swelling process, it is ensured that the profiling assembly does not move backwards, and therefore the contact between the profiling assembly and a workpiece to be machined is kept in a stable state; therefore, the problems that material supplementing fails in the water swelling process of the bevel opening of the to-be-machined part and material supplementing fails due to retreating of the profiling assembly are solved.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust pipe forming, and in particular to an internal high pressure forming device and a forming method thereof. Background Art

[0002] With the widespread development of lightweight applications in automobiles, hydraulic forming technology is an important technical means to promote the development of lightweight automobiles. As an indispensable component of modern fuel vehicles and hybrid vehicles, the exhaust system is widely used in hydraulic forming. The structure of the automobile chassis is complex and has many space restrictions. There is a structure of the connecting pipe as shown in the attached figure. Figure 1 The forming process is: bending → sawing → pressing → water swelling. The diameter of the tube is vertical after sawing, but the two end faces will become oblique due to the shape after pressing (such as the attached Figure 2 As shown in the figure, the red segments at both ends of the pipe fitting are marked. During the water swelling process, the booster plug moves in the direction of the arrow, and the lower material contacts the plug while the upper side cannot. This will eventually cause the upper side of the product to crack due to lack of material pushed in, and the lower side to wrinkle due to excessive material pushed in (as shown in the attached figure). Figure 3 As shown, the circled areas are the cracking areas and wrinkling areas).

[0003] In addition, during the water swelling process, the booster plug is slowly pushed forward under the action of the oil pressure of the oil cylinder, and the water pressure in the cavity is also slowly increasing. During the process of increasing water pressure, the water pressure will exceed the oil pressure of the oil cylinder, and the booster plug will retreat a distance. When the oil pressure is higher than the water pressure again, the booster plug will continue to advance, and this will be repeated. During the process of the booster plug retreating and then advancing, the product cavity will expand and no material will be added, resulting in product cracking.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention and does not constitute any limitation to the present invention. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the present invention provides an internal high-pressure forming device and a forming method thereof. By setting a stop-retreat component on the profiling component, the stop-retreat component imposes constraints on the profiling component in the feeding direction during the water swelling process, ensuring that the profiling component does not move backward, thereby maintaining the contact with the workpiece to be processed in a stable state, thereby solving the problem of failure of material feeding at the bevel of the workpiece to be processed during the water swelling process and failure of material feeding caused by the retreat of the profiling component.

[0006] The invention provides an internal high-pressure forming device, comprising a water swelling die, a profiling component and a backstop component. The profiling component is mounted on the water swelling die and abuts against the end face of a workpiece to be processed clamped in the water swelling die; the backstop component is mounted on the profiling component and is used to stop the profiling component from backing out in the feeding direction of the workpiece to be processed.

[0007] In one embodiment of the present invention, the profiling assembly includes a power end and a profiling head. The power end drives the profiling head to move via a telescopic push rod. The two ends of the profiling head respectively abut against the telescopic push rod and the end surface of the workpiece to be processed.

[0008] In one embodiment of the present invention, the profiling head includes a supporting portion and a telescopic portion. The supporting portion is mounted on the water swelling mold and is used to install a backstop assembly. The telescopic portion is slidably mounted on the circumference of the supporting portion, and the two ends of the telescopic portion are respectively facing the telescopic push rod and the workpiece to be processed; wherein the multiple telescopic portions are jointly abutted against the end surface of the workpiece to be processed.

[0009] In one embodiment of the present invention, the backstop assembly includes a backstop ring and a stop pin. The backstop ring is installed on the support portion and the support portion is sleeved therein; the stop pin is installed on the inner side of the backstop ring and abuts against the telescopic portion.

[0010] In one embodiment of the present invention, the stop pin is in sliding contact with the telescopic portion, and the stop pin has a prestressed force to abut against the telescopic portion.

[0011] In one embodiment of the present invention, a groove is formed on the telescopic portion, and the groove matches the contour of the end portion of the stop pin abutting against the telescopic portion.

[0012] In one embodiment of the present invention, the end contour of the stop pin abutting the telescopic part is round head-shaped, and a notch is provided on one side of the round head of the stop pin along the moving direction of the telescopic part, so that the stop pin can be stopped when the telescopic part moves away from the workpiece to be processed, and will not affect the movement of the telescopic part close to the workpiece to be processed.

[0013] In one embodiment of the present invention, it also includes a sensing module and a processing module. The sensing module is installed on the water-expanding mold and is located on both sides of the profiling component and the workpiece to be processed. The sensing module is used to collect image information of the end face contour of the workpiece to be processed; the processing module is installed on the water-expanding mold, and receives the image information of the end face contour of the workpiece to be processed, and processes it into a feed parameter for the profiling component to contact the workpiece to be processed.

[0014] In one embodiment of the present invention, the processing module communicates with the sensing module and the profiling component via a transmission harness.

[0015] The present invention also provides an internal high pressure forming method, comprising:

[0016] The image information of the end face contour of the workpiece to be processed clamped in the cavity of the water swelling mold is obtained by the sensing module;

[0017] The image information is received by the processing module and converted into corresponding control instructions and transmitted to the profiling component of the water swelling mold;

[0018] The profiling component receives control instructions to drive its telescopic ejector rod to feed and move, so that the contour of the supported profiling head is deformed to match the end face contour of the workpiece to be processed;

[0019] The stop pin of the anti-retraction assembly is pressed into the groove of the profiling head to prevent the profiling head from retreating when the water pressure in the cavity is higher than the supporting force of the telescopic ejector rod.

[0020] The beneficial effects of the present invention are as follows: by setting a stop-retraction component on the profiling component, the stop-retraction component can impose constraints on the profiling component in the feed direction during the water swelling process, ensuring that the profiling component does not move backward, thereby maintaining a stable contact with the workpiece to be processed, and being able to achieve material replenishment according to the end face contour of the product, thereby improving the product qualification rate, and by reasonably configuring the water swelling mold, the profiling component and the stop-retraction component, the quality of the formed parts can be improved.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of a workpiece to be processed in the prior art, such as a connecting pipe;

[0024] Figure 2 It is a schematic diagram of the structure of a workpiece to be processed, such as a connecting pipe, after sawing and profiling processes in the prior art;

[0025] Figure 3 It is a schematic diagram of the structure of a workpiece to be processed, such as a connecting pipe, in a water swelling process in the prior art;

[0026] Figure 4 It is a structural schematic diagram of the internal high pressure forming device in the present invention;

[0027] Figure 5 It is a structural schematic diagram of the internal high pressure forming device of the present invention from another perspective;

[0028] Figure 6 It is a structural schematic diagram of the profiling component in the present invention;

[0029] Figure 7 It is a structural schematic diagram of the stop-retraction component in the present invention.

[0030] In the figure: 100, water swelling mold; 200, profiling component; 210, power end; 211, telescopic ejector rod; 220, profiling head; 221, supporting part; 222, telescopic part; 223, groove; 300, backstop component; 310, backstop ring; 320, stop pin; 321, notch; 400, workpiece to be processed; 500, induction module; 600, processing module; 700, transmission harness. DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied by other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are to describe specific specific embodiments, rather than to limit the scope of protection of the present invention.

[0032] See also Figures 1 to 7 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any structural modification, change in proportional relationship, or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as position and quantitative relationship cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0033] See also Figures 4 to 5 The present invention provides an internal high-pressure forming device, including a water swelling mold 100, a profiling component 200 and a backstop component 300. The profiling component 200 is installed on the water swelling mold 100 and abuts against the end surface of a workpiece 400 to be processed clamped in the water swelling mold 100; the backstop component 300 is installed on the profiling component 200 and is used to stop the profiling component 200 from backing out in the feeding direction of the workpiece 400 to be processed.

[0034] Specifically, in the embodiment of the present invention, the water swelling mold 100 is used to position and clamp the workpiece 400 to be processed and provide the necessary water pressure during the molding process. The profiling component 200 is usually composed of a plurality of adjustable parts, which can accurately match the shape of the workpiece 400 to be processed. Figures 4 to 6As shown, one end of the profiling component 200 abuts against the end face of the workpiece 400. During the water swelling forming process, the profiling component 200 will closely abut against the end face of the workpiece 400 to ensure that the material is evenly stressed during the forming process to avoid cracking and deformation. The backstop component 300 should be designed to have a certain rigidity. Usually, a mechanical backstop device such as a spring, a locking bolt or a pneumatic device can be used. Its main function is to prevent the profiling component 200 from retreating in the feeding direction and ensure that the profiling component 200 maintains close contact with the workpiece 400 during the entire forming process.

[0035] More specifically, the workpiece 400 is first clamped in the water swelling mold 100 by a fixture to ensure that its position is stable. Then the profiling component 200 is installed on the water swelling mold 100 and is in close contact with the end face of the workpiece 400, and can be adjusted according to the shape of the workpiece 400. During the molding process, high-pressure water is applied to the inside through the water swelling mold 100, and the water pressure will push the material of the workpiece 400 to flow and form. When the water pressure in the water swelling mold 100 is higher than the force of the profiling component 200 against the workpiece 400, the backstop component 300 imposes constraints on the profiling component 200 in the feeding direction to ensure that the profiling component 200 does not move backward, thereby maintaining the contact with the workpiece 400 in a stable state. After the molding is completed under the set time and pressure, the water pressure is released, and the backstop component 300 releases the limit on the profiling component 200, and the profiling component 200 and the workpiece 400 can be separated smoothly to obtain the desired molded parts. Thus, the quality of the formed parts can be improved by properly configuring the water swelling mold 100, the profiling component 200 and the stop component 300. In particular, in addition to the beveled end face of the workpiece 400 shown in the drawings of the present invention, it is also applicable to other types of irregular contours.

[0036] See also Figures 4 to 6 In one embodiment, the profiling assembly 200 includes a power end 210 and a profiling head 220. The power end 210 drives the profiling head 220 to move through a telescopic push rod 211 installed thereon; the two ends of the profiling head 220 respectively abut against the telescopic push rod 211 and the end surface of the workpiece 400 to be processed.

[0037] Specifically, in the profiling assembly 200 of the embodiment of the present invention, the power end 210 is responsible for driving the profiling head 220 to move and adjust the position. Its telescopic push rod 211 can be adjusted according to demand, and can be extended and retracted in the driving direction to push the profiling head 220 to move. One end of the telescopic push rod 211 is in contact with the profiling head 220, and the other end is connected to the driving system of the power end 210. The driving system can be an electric motor, a pneumatic device or a hydraulic cylinder, which is responsible for controlling the telescopic movement of the telescopic push rod 211. Figure 6As shown, the posture of the profiling head 220 abutting against the end surface of the workpiece 400 is adjusted by controlling the multiple telescopic push rods 211 to be in different telescopic amounts, so as to form a state of complete abutment and contact with the workpiece 400. In other words, a certain prestress can be provided to the telescopic push rods 211 by manual adjustment or the power end 210, so that the profiling head 220 fully abuts against the end surface of the workpiece 400 to achieve a state of complete contact.

[0038] More specifically, at the beginning of the molding process, the driving system of the power end 210 is started, and the telescopic push rod 211 is extended outward or inward, thereby pushing the profiling head 220 to move and change to an appropriate posture. The end face of the profiling head 220 is in close contact with the end face of the workpiece 400 to be processed. At this time, the two ends of the profiling head 220 respectively abut the telescopic push rod 211 and the workpiece 400 to be processed to ensure uniform force. As high-pressure water begins to be applied inside the water-swelling mold 100, the profiling head 220 provides stable support between the workpiece 400 to be processed and the mold to ensure smooth flow of materials during the molding process. Under the action of high pressure, the material of the workpiece 400 to be processed is completed under the joint action of the mold and the profiling head 220. The power end 210 continues to provide the required support force to ensure that the profiling head 220 always maintains contact with the workpiece 400 to be processed. After the molding is completed, the water pressure is released, and the profiling head 220 and the workpiece 400 to be processed can be separated smoothly. The retraction function of the telescopic push rod 211 ensures that the contouring head 220 can return to the initial position safely.

[0039] See also Figure 6 In one embodiment, the profiling head 220 includes a supporting portion 221 and a telescopic portion 222. The supporting portion 221 is mounted on the water swelling mold 100 and is used to mount the backstop assembly 300. The telescopic portion 222 is slidably mounted on the circumference of the supporting portion 221, and the two ends of the telescopic portion 222 are respectively facing the telescopic ejector rod 211 and the workpiece 400 to be processed. Among them, multiple telescopic portions 222 are jointly abutted against the end surface of the workpiece 400 to be processed.

[0040] Specifically, in the embodiment of the present invention, the support part 221 is the basic part of the entire profiling head 220, fixedly mounted on the water expansion mold 100, and provides stable support. It carries other components and is used to install the connection stop assembly 300 to ensure that the multiple telescopic parts 222 maintain the correct position against the end face of the workpiece 400 during the molding process. The multiple telescopic parts 222 are slidably installed along the circumference of the support part 221, and can be telescoped in the axial direction of the support part 221, and driven to move and change by the movement of the telescopic push rod 211 to adapt to the workpiece 400 of different shapes and sizes. The two ends of the telescopic part 222 face the telescopic push rod 211 and the workpiece 400 to be processed respectively, and can adjust the position as needed, so as to push the telescopic part 222 to better contact the workpiece 400 to be processed. Under the action of the telescopic push rod 211, the multiple telescopic parts 222 change into a shape matching the end face profile of the workpiece 400 to be processed, so as to form a completely abutting contact surface with the workpiece 400 to ensure the uniform distribution of the material during the molding process.

[0041] More specifically, before molding, the support portion 221 of the profiling head 220 is fixed to the water swelling mold 100, and the telescopic portion 222 is in an initial state and does not contact the workpiece 400 to be processed. The telescopic ejector 211 is activated by the power end 210 to make the multiple telescopic portions 222 move simultaneously and extend toward the workpiece 400 to be processed. Each telescopic portion 222 extends outward at a corresponding angle and speed. When the telescopic portion 222 is fully extended, it completely abuts against the end surface of the workpiece 400 to be processed. At this time, high-pressure water begins to be applied in the water swelling mold 100, and the shape formed by the multiple telescopic portions 222 ensures that the molding material is evenly distributed. Due to the joint action of the multiple telescopic portions 222, it can accurately abut on the contour of the workpiece 400 to be processed, ensuring the accuracy of molding. During the molding process, the stable contact of the multiple telescopic portions 222 ensures the flow of the material and the molding quality. During the high pressure application process, the profiling head 220 remains motionless to prevent deformation. After the molding is completed, the high pressure is released, and the telescopic portion 222 returns to the initial position through the retraction mechanism and is separated from the workpiece 400 to facilitate subsequent operations.

[0042] See also Figure 7 In one embodiment, the backstop assembly 300 includes a backstop ring 310 and a stop pin 320 . The backstop ring 310 is mounted on the support portion 221 and the support portion 221 is sleeved therein; the stop pin 320 is mounted on the inner side of the backstop ring 310 and abuts against the telescopic portion 222 .

[0043] Specifically, in the embodiment of the present invention, the stop ring 310 can be an annular component to be installed on the circumference of the outer side of the support part 221. Its inner diameter should match the outer diameter of the support part 221 so that the support part 221 can be effectively inserted therein, which ensures the fixed relationship between the support part 221 and the stop ring 310 during high-pressure forming, so as to provide a stop pin 320 for the installation in the stop ring 310. The stop pin 320 is a small component installed on the inner side of the stop ring 310, and its movable direction is arranged along the radial direction of the support part 221, that is, the stop ring 310, so as to achieve the abutment of the telescopic part 222 on the circumference of the support part 221, and the support part 221 is usually cylindrical or other suitable shapes. The stop pin 320 is used to limit the range of motion of the telescopic part 222 to prevent it from retreating during the water expansion forming process. By abutting the telescopic part 222, the stop pin 320 can effectively maintain the stability and positioning of the telescopic part 222.

[0044] More specifically, during the assembly process, the stop ring 310 is installed on the support part 221 to ensure that it is fixed and secure, and a section of the support part 221 is completely sleeved in the stop ring 310. When the telescopic part 222 begins to extend outward, the contact between the stop pin 320 and the telescopic part 222 ensures that its movement is within a predetermined range. The stop pin 320 abuts against a specific position of the telescopic part 222 to limit its space for retreating backward. During the molding process, high-pressure water will act on multiple telescopic parts 222, and the stop ring 310 and the stop pin 320 work together to ensure that the telescopic part 222 does not displace or deform under high pressure, thereby maintaining the stability of the telescopic part 222. If an accident occurs during the high-pressure molding process, such as material jamming or excessive pressure, the stop pin 320 will bear part of the pressure to prevent excessive movement of the telescopic part 222 and reduce the risk of equipment damage. After the molding is completed, when the telescopic part 222 retracts, the stop pin 320 on the telescopic part 222 is released in advance to ensure that the telescopic part 222 can return to the initial state.

[0045] Furthermore, the stop pin 320 is in sliding contact with the telescopic portion 222, and the stop pin 320 is prestressed to abut against the telescopic portion 222. A groove 223 is provided on the telescopic portion 222, and the groove 223 matches the end profile of the stop pin 320 abutting against the telescopic portion 222.

[0046] Furthermore, the stop pin 320 and the telescopic part 222 adopt a sliding contact mode, which can reduce friction during the movement of the telescopic part 222. The prestressed design of the stop pin 320 ensures that it always maintains good contact with the telescopic part 222 during use. The stop pin 320 will apply a certain initial pressure, i.e., prestressed pressure, during installation to ensure that it can fit closely to the surface of the telescopic part 222 to avoid loosening or falling off, thereby increasing stability. By opening a groove 223 on the surface of the telescopic part 222 and matching the shape of the groove 223 with the contour of the stop pin 320, a stop position is provided for the stop pin 320. The edge of the groove 223 can be designed as a rounded corner or a bevel to reduce wear and improve sliding smoothness.

[0047] Furthermore, the end contour of the stop pin 320 abutting the telescopic part 222 is round-headed, and a notch 321 is provided on one side of the round head of the stop pin 320 along the moving direction of the telescopic part 222, so that the stop pin 320 can be stopped when the telescopic part 222 moves away from the workpiece 400 to be processed, and will not affect the movement of the telescopic part 222 close to the workpiece 400 to be processed.

[0048] Specifically, in the embodiment of the present invention, the end of the stop pin 320 is rounded, which helps to reduce the friction when contacting the telescopic portion 222 and can effectively guide its movement in the groove 223 on the telescopic portion 222. Figure 7 As shown, by providing a notch 321 on one side of the round head of the stop pin 320 along the moving direction of the telescopic part 222, the end of the stop pin 320 only retains a part of the round head at the notch 321, so as to ensure that the stop function is realized in the relative movement between the stop pin 320 and the telescopic part 222. When the telescopic part 222 moves away from the workpiece 400 to be processed, the side wall of the notch 321 directly abuts against the side wall of the groove 223, which can limit the reverse sliding of the telescopic part 222 and prevent it from falling off or retreating. In this way, the stability and safety of the telescopic part 222 can be guaranteed during operation. When the telescopic part 222 moves close to the workpiece 400 to be processed, the arc surface of the round head part at the end of the stop pin 320 contacts the arc surface of the groove 223, and thus will not hinder the movement of the telescopic part 222.

[0049] It should be noted that on the surface of the telescopic part 222 and the stop ring 310, a plurality of grooves 223 and stop pins 320 are correspondingly arranged along the moving direction of the telescopic part 222, so that the stop pins 320 can enter the corresponding grooves 223 to limit the position according to the size of the supporting force applied to the workpiece 400.

[0050] More specifically, when the telescopic portion 222 approaches the workpiece 400, the round head of the stop pin 320 can smoothly slide into the preset position, and the notch 321 does not affect this process, ensuring the smoothness of the movement. When the telescopic portion 222 needs to move away from the workpiece 400, the stop pin 320 can be automatically stuck due to the presence of the notch 321, thereby effectively preventing it from sliding backwards. Reliability in operation is ensured and back-off is avoided. In this way, the interaction between the stop pin 320 and the telescopic portion 222 ensures stable operation in different motion states.

[0051] See also Figure 4 and Figure 5 In one embodiment, it further includes a sensing module 500 and a processing module 600. The sensing module 500 is installed on the water swelling mold 100 and is located on both sides of the profiling component 200 and the workpiece 400 to be processed. The sensing module 500 is used to collect image information of the end face contour of the workpiece 400 to be processed; the processing module 600 is installed on the water swelling mold 100, and receives the image information of the end face contour of the workpiece 400 to be processed, and processes it into a feeding parameter for the profiling component 200 to contact the workpiece 400.

[0052] Specifically, in the embodiment of the present invention, the sensing module 500 may be composed of a camera, a base, etc., for collecting image information of the end face profile of the workpiece 400 to be processed, and the processing module 600 may be composed of a processor and corresponding software and programs, for processing the collected image information and controlling the profiling device. The sensing module 500 is installed on the water-expanding mold 100, located on both sides of the profiling component 200 and the workpiece 400 to be processed. This layout ensures that the end face profile of the workpiece 400 to be processed can be captured from multiple angles. The sensing module 500 can use a high-resolution camera or a laser sensor to collect the profile image information of the end face of the workpiece 400 to be processed in real time. And it has a fast data transmission interface (such as USB, serial port, etc.) to ensure that the image data can be sent to the processing module 600 in a timely manner. The processing module 600 is installed on the water-expanding mold 100 and connected to the sensing module 500 to receive and process the image data, and extract the end face profile features of the workpiece 400 to be processed through its preset image processing algorithm (such as edge detection, contour recognition, etc.). Machine learning or deep learning algorithms can be used to improve recognition accuracy. According to the identified contour features, the feed parameters required for the profiling component 200 to contact the workpiece 400 are calculated. This includes feed speed, depth, angle, etc., to ensure the efficiency and accuracy of the machining process.

[0053] More specifically, during the processing, the sensing module 500 continuously monitors the contour of the workpiece 400 to be processed, and transmits real-time image information to the processing module 600. After receiving the image, the processing module 600 processes it through an algorithm, extracts contour data, and calculates corresponding feed parameters based on these data. The calculated feed parameters will be fed back to the control system of the profiling component 200 to adjust the movement of the profiling component 200, thereby achieving precise processing. In this way, through the cooperation between the sensing module 500 and the processing module 600, it is ensured that the contour information of the workpiece 400 to be processed is collected and processed in real time during the processing, and accurate feed parameters are provided for the movement of the profiling component 200.

[0054] Furthermore, the processing module 600 communicates with the sensing module 500 and the profiling component 200 through the transmission harness 700. Specifically, a high-speed data transmission interface, such as USB3.0, Ethernet or RS-232, can be used between the sensing module 500 and the processing module 600 to ensure real-time transmission of image data and reduce delays. The cable material suitable for the environment is selected, with good anti-interference ability, to ensure the stability and reliability of data transmission.

[0055] The present invention also provides an internal high-pressure forming method, comprising obtaining image information of the end face contour of a workpiece 400 to be processed clamped in the cavity of a water-expanding mold 100 through a sensing module 500; receiving the image information through a processing module 600, and converting it into corresponding control instructions and transmitting it to a profiling component 200 of the water-expanding mold 100; receiving the control instructions through the profiling component 200 to drive its telescopic ejector rod 211 to feed and move, so that the contour of the supported profiling head 220 is deformed to match the end face contour of the workpiece 400 to be processed; and preventing the profiling head 220 from retreating when the water pressure in the cavity is higher than the supporting force on the telescopic ejector rod 211 by the stop pin 320 of the stop assembly 300.

[0056] Specifically, in an embodiment of the present invention, after the pressed product is placed in the mold cavity, the sensing modules 500 on both sides will collect the end face contour information of the product, and after collection, transmit it to the processing module 600 through the transmission harness 700. The processing module 600 will process the collected information data and transmit the result to the control system of the profiling component 200 through the transmission harness 700, control the feed amount of the telescopic push rod 211 in the profiling component 200 to change the distance between the front and rear of the profiling head 220, and finally achieve the matching of the contour of the entire profiling head 220 with the end face of the workpiece 400 to be processed; when the water rises to assist, the weak points of the material can be effectively compensated.

[0057] During the process of plugging, the telescopic push rod 211 lifts the stop pin 320 in the stop assembly 300 to replenish the material, and then the stop pin 320 falls into the groove 223 on the surface of the telescopic plate in the profiling assembly 200. When the water pressure in the cavity of the water-rising mold 100 is higher than the oil pressure of the profiling assembly 200 supporting the workpiece 400 to be processed, the stop pin 320 will block the telescopic plate to prevent it from retreating. As the oil pressure of the profiling assembly 200 supporting the workpiece 400 to be processed further exceeds the water pressure, the profiling assembly 200 is pushed to continue replenishing the material. After the water rise ends, the stop pin 320 in the stop assembly 300 is reset, and the profiling assembly 200 returns to its initial position.

[0058] In summary, the present invention provides an internal high-pressure forming device and a forming method thereof. By means of a stop-retract component arranged on the profiling component, the stop-retract component imposes constraints on the profiling component in the feeding direction during the water swelling process, ensuring that the profiling component does not move backward, thereby maintaining a stable contact with the workpiece to be processed. This solves the problem of failure of material filling at the bevel of the workpiece to be processed during the water swelling process and failure of material filling caused by the retreat of the profiling component. Material filling can be achieved according to the end face contour of the product, thereby improving the product qualification rate. The quality of the formed parts can be improved by reasonably configuring the water swelling mold, the profiling component and the stop-retract component.

[0059] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An internal high pressure forming device, comprising a water swelling mold (100), characterized in that: Also includes: a profiling component (200), the profiling component (200) being mounted on the water swelling mold (100) and abutting against an end surface of a workpiece (400) to be processed clamped in the water swelling mold (100); and A back-stop assembly (300) is installed on the profiling assembly (200) and is used to stop the profiling assembly (200) from backing out in the feeding direction of the workpiece (400) to be processed.

2. The internal high pressure forming device according to claim 1, characterized in that: The profiling component (200) comprises a power end (210) and a profiling head (220); the power end (210) drives the profiling head (220) to move via a telescopic push rod (211); and two ends of the profiling head (220) respectively abut against the telescopic push rod (211) and the end surface of the workpiece (400) to be processed.

3. The internal high pressure forming device according to claim 2, characterized in that: The profiling head (220) comprises: A support portion (221), the support portion (221) being mounted on the water swelling mold (100) and used for mounting the backstop assembly (300); and A telescopic portion (222), the telescopic portion (222) being slidably mounted on the circumference of the support portion (221), and two ends of the telescopic portion (222) facing the telescopic top rod (211) and the workpiece (400) to be processed respectively; Wherein, the plurality of telescopic portions (222) are jointly in contact with the end surface of the workpiece (400) to be processed.

4. The internal high pressure forming device according to claim 3, characterized in that: The anti-recoil assembly (300) comprises an anti-recoil ring (310) and a stop pin (320); the anti-recoil ring (310) is mounted on the support portion (221), and the support portion (221) is sleeved therein; The stop pin (320) is installed on the inner side of the stop ring (310) and abuts against the telescopic portion (222).

5. The internal high pressure forming device according to claim 4, characterized in that: The stop pin (320) is in sliding contact with the telescopic portion (222), and the stop pin (320) is provided with a prestress to abut against the telescopic portion (222).

6. The internal high pressure forming device according to claim 5, characterized in that: The telescopic portion (222) is provided with a groove (223), and the groove (223) matches the contour of the end of the stop pin (320) abutting against the telescopic portion (222).

7. The internal high pressure forming device according to claim 6, characterized in that: The end contour of the stop pin (320) abutting against the telescopic part (222) is round-headed, and a notch (321) is provided on one side of the round head of the stop pin (320) along the moving direction of the telescopic part (222), so that the stop pin (320) can be stopped when the telescopic part (222) moves away from the workpiece (400) to be processed, and will not affect the movement of the telescopic part (222) close to the workpiece (400) to be processed.

8. The internal high pressure forming device according to claim 1, characterized in that: Also includes: a sensing module (500), the sensing module (500) being installed on the water swelling mold (100) and located on both sides of the profiling component (200) and the workpiece (400), the sensing module (500) being used to collect image information of the end face profile of the workpiece (400); as well as A processing module (600) is installed on the water swelling mold (100) and receives image information of the end face profile of the workpiece (400) to be processed and processes it into a feed parameter for the profiling component (200) to abut against the workpiece (400) to be processed.

9. The internal high pressure forming device according to claim 8, characterized in that: The processing module (600) performs wired communication with the sensing module (500) and the profiling component (200) respectively via a transmission harness (700).

10. An internal high pressure forming method, characterized in that: include: Acquiring image information of the end face profile of a workpiece (400) to be processed clamped in a cavity of a water swelling mold (100) through a sensing module (500); The image information is received by a processing module (600), and converted into corresponding control instructions and transmitted to a contour-forming component (200) of a water swelling mold (100); Receiving a control instruction through the profiling component (200) drives its telescopic push rod (211) to feed and move, so that the contour of the supported profiling head (220) is deformed to match the end face contour of the workpiece (400) to be processed; The stop pin (320) of the stop assembly (300) is pressed into the groove (223) of the profiling head (220) to prevent the profiling head (220) from retreating when the water pressure in the cavity is higher than the supporting force of the telescopic push rod (211).

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