Water swelling forming device

Abstract

The invention discloses a water swelling forming device which comprises a mold structure and a base, the mold structure comprises an upper mold and a lower mold, a transverse sliding driving unit is installed through the base, the lower mold is driven by the transverse sliding driving unit to slide, a vertical sliding driving unit is installed through the base, and the lower mold is driven by the vertical sliding driving unit to slide. The upper mold is driven by the vertical sliding driving unit to slide, a pressurizing device is installed through the base, when the upper mold and the lower mold are closed, the pressurizing device is inserted between the upper mold and the lower mold and injects water into a machined part, water retreats when the water is injected to the rated water pressure, the upper mold and the lower mold are separated after water retreating, and the upper mold and the lower mold are separated. Taking out the formed part; the device can prevent water flow from being sprayed out and is safer to operate.

Description

Technical Field

[0001] The invention relates to a water swelling forming device. Background Art

[0002] The principle of water expansion forming is to use the pipe as the blank and water as the transmission medium. Water with ultra-high pressure is filled into the pipe to generate pressure on the inner wall of the pipe. The two ends of the pipe are sealed with a punch. Axial feed is used to provide feed for pipe forming, so that the outer wall of the pipe is completely close to the mold cavity, thereby obtaining parts of the desired shape.

[0003] In the prior art, during water expansion forming, the tube is clamped and closed by closing the mold. The gap of the mold after closing the mold needs to be smaller than the wall thickness of the tube being processed. During the tube expansion process, the tube has a certain probability of cracking due to production defects. After the cracking, high-pressure water is ejected at high speed from the tiny gap of the mold, posing a great safety hazard.

[0004] Based on the above problems, we designed a water expansion forming device which can avoid water spraying and is safer to operate. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a water swelling forming device which can avoid water spraying and has safer operation.

[0006] To solve the above problems, the present invention adopts the following technical solutions:

[0007] A water expansion molding device comprises a mold structure and a base, the mold structure comprises an upper mold and a lower mold, a lateral sliding drive unit is installed through the base, the lower mold is driven to slide by the lateral sliding drive unit, a vertical sliding drive unit is installed through the base, the upper mold is driven to slide by the vertical sliding drive unit, and a booster device is installed through the base. When the upper mold and the lower mold complete the mold closing, the booster device is inserted between the upper mold and the lower mold, and water is injected toward the workpiece. After the water is injected to the rated water pressure, the water is withdrawn. After the water is withdrawn, the upper mold and the lower mold are separated, and the molded part can be taken out.

[0008] Preferably, a groove is provided on the upper part of the base, and the left end of the groove passes through the base, and a first screw is rotatably provided at the right end surface of the base, and a first servo motor for driving the first screw to rotate is fixed at the right end of the base, and the first servo motor is controlled by a servo system, and slide grooves are provided on the groove walls on both sides of the groove, and the boosting device is driven to move by the first screw and is slidably guided by the slide grooves, and the lateral sliding drive unit is rotatably installed at the left end position of the upper part of the base, and the vertical sliding drive unit is installed at the top middle position of the base, and a platform part is provided at the middle position of the base, and when the lower mold is limited by the platform part, the lower mold is in a horizontal state.

[0009] Preferably, the lateral sliding drive unit includes a rotating bracket, a rotating seat, a steering reduction servo motor, a carrier plate and a second servo motor. The rotating seat is fixed to the top of the base. There are two rotating seats, which are arranged on both sides of the groove. Connecting shafts are provided at both ends of the rotating bracket. The connecting shaft is rotatably matched with the rotating seat. The steering servo motor is installed on the base and connected to one end of the connecting shaft. The carrier plate is fixed to the rotating bracket. The second servo motor is installed at the end of the rotating bracket away from the carrier plate. A second screw is installed at the output end of the second servo motor. A bearing is matched between the second screw and the rotating bracket. The lower mold is driven to slide along the carrier plate through the rotation of the second screw.

[0010] Preferably, a protruding frame is provided on the outer side of the upper part of the lower mold, a lower mold groove is provided at the middle position of the top of the lower mold, and the lower mold is embedded through the lower mold groove, and a lower arc groove is provided on the top of the lower mold, the lower arc groove is closed at the end facing the rotating bracket, and the other end horizontally passes through the lower mold, and a second threaded hole matching the second screw is passed through the side of the lower mold, and a positioning device for positioning the processed pipe fitting is embedded at the end of the lower arc groove, and the positioning device is coaxial with the lower arc groove, and a through groove is provided at the bottom of the lower mold, and first slide grooves are symmetrically provided at the groove walls on both sides of the through groove, and the carrier plate is matched with the through groove, and first slide strips matching the first slide grooves are provided on both sides of the carrier plate, and the upper mold is fitted into the frame from top to bottom and completes the mold closing with the lower mold.

[0011] Preferably, water guiding grooves are arranged on both sides of the lower mold, a water collecting groove is arranged on the top of the carrier plate, the depth of the water collecting groove gradually deepens toward the rotating bracket, and a water outlet pipe connected to the water collecting groove is arranged at the bottom of the carrier plate.

[0012] Preferably, the positioning device includes a positioning column, and a guide pipe is arranged at the end face of the positioning column. The guide pipe passes through the groove wall of the lower arc groove to the outside of the lower mold. After the guide pipe passes through, it is equipped with a pressure relief valve. The pressure relief direction of the pressure relief valve is downward corresponding to the water collecting tank. The interior of the positioning column is hollow, and a conical guide portion is arranged at the end of the positioning column away from the guide pipe, and a pressure relief hole is processed at the axis center of the guide portion.

[0013] Preferably, the vertical sliding drive unit includes an upper platform and a telescopic rod, a plurality of guide shafts are arranged between the upper platform and the base, the telescopic rod is fixed to the top of the upper platform, the telescopic end of the telescopic rod passes downward through the upper platform and is fixedly connected to the upper mold, a guide plate is arranged on the outer side of the upper mold, the guide shaft passes through the guide plate, the upper mold and the frame are gap-matched, an upper mold groove corresponding to the lower mold groove is arranged at the bottom of the upper mold, an upper mold groove matching the lower mold is embedded in the upper mold groove, an upper arc groove corresponding to the lower arc groove is arranged at the bottom of the upper mold, the lower arc groove and the upper arc groove are combined to form a channel, the formed pipe is positioned in the channel, and the booster device enters along the channel formed by the combination of the lower arc groove and the upper arc groove.

[0014] Preferably, the boosting device comprises a pipeline, a lower bracket is arranged at the bottom of the pipeline, a second slide bar matching the slide groove is arranged at the outer wall of the lower bracket, the lower bracket has a first threaded hole matching the first screw rod, a pipe cover is arranged at one end of the pipeline, a movable pipe is movably assembled at the axis of the pipe cover, one end of the movable pipe is inserted into the pipeline after passing through the pipe cover, a piston is installed at the end, a sealing ring is arranged at the outer wall of the piston, a seal is formed between the sealing ring and the inner wall of the pipeline, a hydraulic telescopic rod is fixed to the other end of the pipeline, and the movable end of the hydraulic telescopic rod is inserted into the A first piston is fitted in the pipe, a first sealing ring is arranged on the outer wall of the first piston, a water inlet pipe and a drain pipe are arranged on the outer wall of the pipe, valves are installed on the water inlet pipe and the drain pipe, a spring is sleeved on the movable pipe, the spring is fixed between the pipe cover and the piston, an adjusting device is installed between the pipe and the pipe cover, a sealing ring is clamped at the pipe mouth of the movable pipe, the movable pipe enters along the channel constructed by the lower arc groove and the upper arc groove, and after entering, a seal is formed between the sealing ring and the inner wall of the channel, and the end face of the sealing ring forms a seal with the end face of the formed pipe fitting.

[0015] Preferably, a sliding plate is sleeved on the outside of the movable tube, and the sliding plate slides along the axial direction of the movable tube. A second spring is sleeved on the movable tube, and the second spring is fixed between the sliding plate and the tube cover. A sealing sheet is provided at the end of the sliding plate away from the tube cover, and when the movable tube is inserted into the channel constructed by the lower arc groove and the upper arc groove, the sealing sheet is sealed at the channel opening.

[0016] Preferably, the adjusting device includes a guide sleeve and a threaded sleeve, a clamping ring is provided on the outer wall of the guide sleeve, the clamping ring is clamped between the pipe and the pipe cover, the outside of the threaded tube is processed with an external thread, the threaded tube and the guide sleeve thread cooperate, the movable tube passes through the axis of the threaded sleeve, and the right end of the movable tube forms a limit for the sliding of the piston.

[0017] The beneficial effects of the present invention are:

[0018] Advantage 1: In this device, after the upper mold and the lower mold are closed, if the processed pipe is cracked, water will be ejected from between the upper mold and the lower mold. The ejected water is blocked by the specially designed lower mold to avoid being ejected to the staff operating in the front, thus playing a safety protection role.

[0019] Advantage 2: In this device, the lower mold can slide out sideways, and the pipe can be loaded after sliding out, which makes the operation safer and can prevent the upper mold from falling in an abnormal working state, thus avoiding accidents.

[0020] Advantage three, the lower mold in the device can be tilted, and the residual water in the lower mold can be discharged after tilting, which is convenient for the next molding work. The device has a simple structure and low cost, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the cooperation between the lateral sliding drive unit and the lower mold;

[0024] Figure 3 Schematic diagram of the mold closing of the upper mold and the lower mold;

[0025] Figure 4 This is a schematic diagram of the installation of the booster device;

[0026] Figure 5 is a three-dimensional diagram of the lower mold;

[0027] Figure 6 is a partial cross-sectional view of the positioning device;

[0028] Figure 7 It is a schematic diagram of the cooperation between the vertical sliding drive unit and the upper mold;

[0029] Figure 8 is a three-dimensional diagram of the upper mold;

[0030] Fig. 9 is a three-dimensional diagram of a supercharging device;

[0031] Fig.10 is a cross-sectional view of a supercharging device;

[0032] Fig.11 It is a schematic diagram of the structure of the regulating device. DETAILED DESCRIPTION

[0033] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0034] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0035] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, in the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "disposed", "socketed", "connected", "through", "plugged" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See also Figure 1 , Figure 2 and Figure 3 A water expansion molding device is shown, including a mold structure 1 and a base 2, the mold structure 1 includes an upper mold 101 and a lower mold 102, a lateral sliding drive unit 3 is installed through the base 2, the lower mold 102 is driven to slide by the lateral sliding drive unit 3, a vertical sliding drive unit 4 is installed through the base 2, the upper mold 101 is driven to slide by the vertical sliding drive unit 4, and a booster device 5 is installed through the base 2. When the upper mold 101 and the lower mold 102 complete the mold closing, the booster device 5 is inserted between the upper mold 101 and the lower mold 102, and water is injected toward the workpiece. After the water is injected to the rated water pressure, the water is withdrawn. After the water is withdrawn, the upper mold 101 and the lower mold 102 are separated, and the molded part can be taken out.

[0039] The operation mode of the above technical solution is as follows:

[0040] First, the lower mold 102 slides to the left side under the drive of the lateral sliding drive unit 3. After sliding to the left side, the lower mold 102 is separated from the bottom of the upper mold 101. At this time, the pipe fittings to be processed are assembled on the lower mold 102, and then the lower mold is pushed to be opposite to the upper mold 101 by the lateral sliding drive unit 3.

[0041] At this time, the upper mold 101 starts to move downward under the drive of the vertical sliding drive unit 4 until the upper mold 101 and the lower mold 102 are molded together.

[0042] After the molds are closed, the pressure-boosting device 5 is inserted between the upper mold 101 and the lower mold 102, and water is injected into the pipe fitting. The water pressure inside the pipe fitting increases, causing the pipe fitting to expand and then complete the expansion.

[0043] After the expansion is completed, the pressurizing device 5 is pulled out, the upper mold 101 moves upward and separates from the lower mold 102, and then the lower mold 102 is driven to slide out by the lateral sliding drive unit 3. After sliding out, the lateral sliding drive unit 3 drives the lower mold 102 to rotate, so that the lower mold 102 is tilted and the water in the lower mold 102 is poured out.

[0044] After pouring out, the lower mold 102 is reset under the driving action of the lateral sliding driving unit 3, and the next processing can be started.

[0045] Compared with the conventional technology, the present device can complete the mold closing of the upper mold 101 and the lower mold 102 in a vertical position.

[0046] After the lower mold 102 slides outward, it is dislocated with the upper mold 101, and the addition and removal of the processed material are completed in the dislocated state. During the operation, accidents caused by the downward movement of the upper mold 101 are avoided.

[0047] Meanwhile, compared with the prior art, the inclined state of the lower mold 102 facilitates drainage.

[0048] See also Figure 4 As shown, a groove 201 is provided on the upper part of the base 2, and the left end of the groove 201 passes through the base 2. A first screw 202 is rotatably provided at the right end surface of the base 2, and a first servo motor 203 for driving the first screw 202 to rotate is fixed at the right end of the base 2, and the first servo motor 203 is controlled by a servo system. Slide grooves are provided on the groove walls on both sides of the groove 201, and the booster device 5 is driven to move by the first screw 202 and is guided by the slide grooves for sliding. The lateral sliding drive unit 3 is rotatably installed at the left end position of the upper part of the base 2, and the vertical sliding drive unit 4 is installed at the top middle position of the base 2. A platform part 204 is provided at the middle position of the base 2, and when the lower mold 102 is limited by the platform part 204, the lower mold 102 is in a horizontal state.

[0049] In the above technical solution, the arrangement of the groove 201 provides space for the rotation of the lateral sliding drive unit 3 and can also collect water overflowing during the water swelling forming process.

[0050] The platform portion 204 can provide support for the bottom of the lower mold 102 , and generate sufficient support force after the upper mold 101 is closed downwards, thereby ensuring accurate closing of the mold.

[0051] See also Figure 2As shown, the lateral sliding drive unit 3 includes a rotating bracket 31, a rotating seat 32, a steering reduction servo motor 33, a carrier plate 34 and a second servo motor 35. The rotating seat 32 is fixed to the top of the base 2. There are two rotating seats 32, which are respectively arranged on both sides of the groove 201. Connecting shafts 36 are provided at both ends of the rotating bracket 31. The connecting shaft 36 is rotatably matched with the rotating seat 32. The steering servo motor 33 is installed on the base 2 and connected to one end of the connecting shaft 36. The carrier plate 34 is fixed to the rotating bracket 31. The second servo motor 35 is installed at the end of the rotating bracket 31 away from the carrier plate 34. A second screw 37 is installed at the output end of the second servo motor 35. A bearing is matched between the second screw 37 and the rotating bracket 31. The lower mold 102 is driven to slide along the carrier plate 34 through the rotation of the second screw 37.

[0052] In the above technical solution, the rotating bracket 31 rotates under the drive of the steering reduction servo motor 33. The purpose of the rotation is to adjust the inclination angle of the lower mold 102 relative to the horizontal plane. After the water swelling molding is completed, the water leaked in the lower mold 102 can be discharged by tilting the lower mold 102, so as to avoid the remaining water from affecting the next molding.

[0053] Secondly, the second screw 37 driven by the second servo motor 35 drives the lower mold 102 to adjust its lateral position, so that the material filling action is performed at a position away from the position directly below the upper mold 101, making production safer.

[0054] The second servo motor 35 and the steering deceleration servo motor 33 are both controlled by the servo system. Through program setting, an independent ejection button can be set. After pressing the ejection button, the upper mold 101 moves upward, and then the lower mold 102 moves outward and rotates a certain angle.

[0055] See also Figure 2 , Figure 3 and Figure 5As shown, a protruding frame 110 is provided at the outer side of the upper part of the lower mold 102, a lower mold groove 111 is provided at the middle position of the top of the lower mold 102, and a lower mold 112 is embedded through the lower mold groove 111. A lower arc groove 113 is provided on the top of the lower mold 102. The end of the lower arc groove 113 facing the rotating bracket 31 is closed, and the other end horizontally penetrates the lower mold 102. A second threaded hole 114 matching the second screw rod 37 is penetrated on the side of the lower mold 102. A positioning device 115 for positioning the processed pipe fitting is embedded at the end of 113, and the positioning device 115 is coaxial with the lower arc groove 113. A through groove 116 is provided at the bottom of the lower mold 102, and first slide grooves 117 are symmetrically provided at the groove walls on both sides of the through groove 116. The carrier plate 34 cooperates with the through groove 116, and first slide bars 341 that cooperate with the first slide groove 117 are provided on both sides of the carrier plate 34. The upper mold 101 is fitted into the frame 110 from top to bottom, and completes the mold closing with the lower mold 112.

[0056] In the above technical solution, the lower mold 112 is installed in the lower mold groove 111, and the fixing method is one of gluing and bolting, which is convenient for replacing the corresponding lower mold 112 according to actual molding needs.

[0057] In the above technical solution, through the protruding frame 110, during the injection molding process, if the workpiece cracks, water will be squeezed out under high pressure and ejected at high speed from the tiny gap between the upper mold 101 and the lower mold 102. The ejected water is intercepted by the protruding frame 110, making the production operation safer.

[0058] In the above technical solution, the positioning device 115 is used to complete the positioning of the processed pipe and the sealing of the inner wall.

[0059] See also Figure 2 and Figure 5 As shown, water guide grooves 118 are provided on both sides of the lower mold 102, a water collecting groove 342 is provided on the top of the carrier plate 34, the depth of the water collecting groove 342 gradually deepens toward the direction of the rotating bracket 31, and a water outlet pipe 343 connected to the water collecting groove 342 is provided at the bottom of the carrier plate 34.

[0060] In the above technical solution, through the cooperation of the water guide groove 118 and the frame 110, after the upper mold 101 is separated upward, the overflowing water can be guided from the surface of the lower mold 102 to the water collecting groove 342, and then discharged through the water outlet pipe 343. A hose can be installed at the water outlet pipe 343 for drainage.

[0061] See also Figure 2 , Figure 5 and Figure 6As shown, the positioning device 115 includes a positioning column 1151, and a guide pipe 1152 is arranged at the end face of the positioning column 1151. The guide pipe 1152 passes through the groove wall of the lower arc groove 113 to the outside of the lower mold 102. After the guide pipe 1152 passes through, it is equipped with a pressure relief valve 1153. The pressure relief direction of the pressure relief valve 1153 is downward corresponding to the water collecting tank 342. The interior of the positioning column 1151 is hollow, and the end of the positioning column 1151 away from the guide pipe 1152 is provided with a conical guide portion 1154, and the axis of the guide portion 1154 is processed with a pressure relief hole 1155.

[0062] A rubber sleeve (not shown) is sleeved on the outside of the positioning column 1151 . The size of the rubber sleeve is determined according to the inner diameter of the processed pipe fitting. The positioning column 1151 is used to position the pipe fitting.

[0063] The pressure relief valve 1153 is used to set the pressure relief pressure. When the internal water pressure of the processed pipe is overpressure, the pressure is released through the pressure relief valve 1153, which plays a role in safety protection.

[0064] And the direction of pressure relief is controllable, which is safer.

[0065] See also Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the vertical sliding drive unit 4 includes an upper platform 41 and a telescopic rod 42. A plurality of guide shafts 43 are arranged between the upper platform 41 and the base 2. The telescopic rod 42 is fixed to the top of the upper platform 41. The telescopic end of the telescopic rod 42 passes downward through the upper platform 41 and is fixedly connected to the upper mold 101. A guide plate 121 is arranged on the outer side of the upper mold 101. The guide shaft 43 passes through the guide plate 121. The upper mold 101 is clearance-matched with the frame 110. The bottom of the upper mold 101 is provided with an upper mold groove 122 corresponding to the lower mold groove 111, and the upper mold groove 122 is embedded with an upper mold 123 that matches the lower mold 112. The bottom of the upper mold 101 is provided with an upper arc groove 124 corresponding to the lower arc groove 113. The lower arc groove 113 and the upper arc groove 124 are combined to form a channel, and the formed pipe is positioned in the channel. The booster device 5 enters along the channel formed by the combination of the lower arc groove 113 and the upper arc groove 124.

[0066] In the above technical solution, the fixing method of the upper mold 123 is consistent with the fixing method of the lower mold 112, and both are replaceable.

[0067] See also Figure 3 , Fig. 9 , Fig.10 and Fig.11As shown, the booster device 5 includes a pipeline 51, a lower bracket 514 is provided at the bottom of the pipeline 51, a second slide bar 515 matching the slide groove is provided at the outer wall of the lower bracket 514, and the lower bracket 514 has a first threaded hole 516 matching the first screw rod, a pipe cover 52 is provided at one end of the pipeline 51, and a movable pipe 53 is movably assembled at the axis of the pipe cover 52, and one end of the movable pipe 53 is inserted into the pipeline 51 after passing through the pipe cover 52, and a piston 54 is installed at this end, and a sealing ring 55 is provided at the outer wall of the piston 54, and a seal is formed between the sealing ring 55 and the inner wall of the pipeline 51, and a hydraulic telescopic rod 56 is fixed to the other end of the pipeline 51, and the movable end of the hydraulic telescopic rod 56 is inserted into the pipeline 51 A first piston 57 is fitted inside and behind, and a first sealing ring 58 is provided on the outer wall of the first piston 57. A water inlet pipe 59 and a drain pipe 510 are provided on the outer wall of the pipeline 51, and valves 511 are installed on the water inlet pipe 59 and the drain pipe 510. A spring 512 is sleeved on the movable pipe 53, and the spring 512 is fixed between the pipe cover 52 and the piston 54. An adjusting device 6 is installed between the pipeline 51 and the pipe cover 52. A sealing ring 513 is clamped at the pipe mouth of the movable pipe 53, and the movable pipe 53 enters along the channel constructed by the lower arc groove 113 and the upper arc groove 124. After entering, a seal is formed between the sealing ring 513 and the inner wall of the channel, and the end face of the sealing ring 513 forms a seal with the end face of the formed pipe fitting.

[0068] The implementation method of the above technical solution is as follows:

[0069] When the water inlet pipe 59 is connected to the water supply unit and the drain pipe 510 is connected to the water return unit, the water return unit adopts a pumping water return method, that is, the water in the drain pipe 510 is pumped out through the cooperation of a water pump and a hose.

[0070] Before the expansion begins, keep the valves 511 at the drain pipe 510 and the water inlet pipe 59 closed. The valve 511 is a solenoid valve. The first piston 57 returns to its original position. At this time, the water inlet position of the water inlet pipe 59 is between the piston 54 and the first piston 57.

[0071] After the upper mold 101 and the lower mold 102 are closed, the pipe 51 is displaced by the rotation of the first screw, so that the movable pipe 53 is inserted between the upper mold 101 and the lower mold 102 and abuts against one end of the expanded pipe.

[0072] At this time, the valve 511 at the water inlet pipe 59 is opened, and water is poured into the pipe 51 until it is full. At this time, the valve 511 is closed, and the hydraulic telescopic rod 56 drives the first piston 57 to move toward the piston 54, so that the water is further pressurized. During the pressurization process, water enters the expanded pipe fitting, which increases the internal pressure of the pipe fitting and drives the pipe fitting to deform. While the pipe fitting is deformed, the axial length of the pipe fitting is shortened, and the piston 54 is synchronously displaced under the action of the water pressure, so that the sealing ring 513 always fits and seals with the end face of the processed pipe fitting, and the final limit of the piston 54 is completed by the adjusting device 6 to avoid the spring damage caused by the piston 54 continuously compressing the spring.

[0073] After the expansion is completed, the first piston 57 is reset, and most of the water in the pipe is sucked out. The valve 511 at the drain pipe 510 is opened, and water is pumped out through the return water unit to pump out the water in the formed pipe, and also the water in the pipeline 51 and the movable pipe 53.

[0074] Then start the next processing preparation.

[0075] See also Fig.10 As shown, a sliding plate 553 is sleeved on the outside of the movable tube 53, and the sliding plate 553 slides along the axial direction of the movable tube 53. A second spring 554 is sleeved on the movable tube 53, and the second spring 554 is fixed between the sliding plate 553 and the tube cover 52. A sealing sheet 555 is provided at the end of the sliding plate 553 away from the tube cover 52. When the movable tube 54 is inserted into the channel constructed by the lower arc groove 113 and the upper arc groove 124, the sealing sheet 555 is sealed at the channel opening.

[0076] In the above technical solution, the sliding plate 553 can slide along the tube wall of the movable tube 53, and during the molding process, a waterproof effect is formed on the opening of the channel.

[0077] See also Fig.10 and Fig.11 As shown, the adjusting device 6 includes a guide sleeve 61 and a threaded sleeve 62. A clamping ring 63 is provided on the outer wall of the guide sleeve 61. The clamping ring 63 is clamped between the pipe 51 and the pipe cover 52. The outer surface of the threaded tube 62 is processed with an external thread. The threaded tube 62 is threadedly matched with the guide sleeve 61. The movable tube 53 passes through the axis of the threaded sleeve 62. The right end of the movable tube 53 limits the sliding of the piston 54.

[0078] The length of the adjusting device can be adjusted by means of thread adjustment, so that the distance that the movable tube 53 moves outward is limited, thereby preventing the movable tube 53 from moving outward excessively, and at the same time protecting the spring and preventing the spring from being overly compressed.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A water swelling forming device, characterized in that: The invention comprises a mold structure (1) and a base (2), wherein the mold structure (1) comprises an upper mold (101) and a lower mold (102), wherein a lateral sliding drive unit (3) is installed through the base (2), and the lower mold (102) is driven to slide through the lateral sliding drive unit (3), wherein a vertical sliding drive unit (4) is installed through the base (2), and the upper mold (101) is driven to slide through the vertical sliding drive unit (4), and a booster device (5) is installed through the base (2), and when the upper mold (101) and the lower mold (102) are molded together, the booster device (5) is inserted between the upper mold (101) and the lower mold (102), and water is injected toward the workpiece, and the water is withdrawn after the water is injected to the rated water pressure, and after the water is withdrawn, the upper mold (101) and the lower mold (102) are separated, and the molded part can be taken out.

2. The water swelling forming device according to claim 1, characterized in that: A groove (201) is provided on the upper part of the base (2), the left end of the groove (201) passes through the base (2), a first screw rod (202) is rotatably provided at the right end surface of the base (2), a first servo motor (203) for driving the first screw rod (202) to rotate is fixed at the right end of the base (2), the first servo motor (203) is controlled by a servo system, and slide grooves are provided on the groove walls on both sides of the groove (201), the boosting device (5) is driven to move by the first screw rod (202), and is guided by the slide grooves for sliding, the lateral sliding drive unit (3) is rotatably installed at the left end position of the upper part of the base (2), the vertical sliding drive unit (4) is installed at the top middle position of the base (2), and a platform part (204) is provided at the middle position of the base (2), and when the lower mold (102) is limited by the platform part (204), the lower mold (102) is in a horizontal state.

3. The water swelling forming device according to claim 2, characterized in that: The lateral sliding drive unit (3) comprises a rotating bracket (31), a rotating seat (32), a steering reduction servo motor (33), a carrier plate (34) and a second servo motor (35). The rotating seat (32) is fixed to the top of the base (2). Two rotating seats (32) are provided, which are respectively arranged on both sides of the groove (201). Connecting shafts (36) are provided at both ends of the rotating bracket (31). The connecting shafts (36) are rotatably matched with the rotating seat (32). The steering servo motor (33) is installed on the rotating seat (32). The base (2) is connected to one end of the connecting shaft (36), the carrier plate (34) is fixed to the rotating bracket (31), the second servo motor (35) is installed at the end of the rotating bracket (31) away from the carrier plate (34), a second screw rod (37) is installed at the output end of the second servo motor (35), a bearing is matched between the second screw rod (37) and the rotating bracket (31), and the lower mold (102) is driven to slide along the carrier plate (34) through the rotation of the second screw rod (37).

4. The water swelling forming device according to claim 3, characterized in that: A protruding frame (110) is provided on the outer side of the upper part of the lower mold (102); a lower mold groove (111) is provided at the middle position of the top of the lower mold (102); a lower mold (112) is embedded through the lower mold groove (111); a lower arc groove (113) is provided on the top of the lower mold (102); the lower arc groove (113) is closed at the end facing the rotating bracket (31) and the other end horizontally penetrates the lower mold (102); a second threaded hole (114) matching the second screw rod (37) is penetrated on the side of the lower mold (102); the lower arc groove (113) is provided at the bottom of the lower mold (102); ) is embedded at the end of the upper mold (102) for positioning the processed pipe fitting, the positioning device (115) is coaxial with the lower arc groove (113), a through groove (116) is arranged at the bottom of the lower mold (102), first slide grooves (117) are symmetrically arranged at the groove walls on both sides of the through groove (116), the carrier plate (34) is matched with the through groove (116), and first slide bars (341) matching the first slide grooves (117) are arranged on both sides of the carrier plate (34), the upper mold (101) is fitted into the frame (110) from top to bottom, and completes the mold closing with the lower mold (112).

5. The water swelling forming device according to claim 4, characterized in that: Water guide grooves (118) are arranged on both sides of the lower mold (102), a water collecting groove (342) is arranged on the top of the carrier plate (34), the depth of the water collecting groove (342) gradually increases toward the direction of the rotating bracket (31), and a water outlet pipe (343) connected to the water collecting groove (342) is arranged at the bottom of the carrier plate (34).

6. The water swelling forming device according to claim 5, characterized in that: The positioning device (115) comprises a positioning column (1151), and a guide tube (1152) is arranged at the end surface of the positioning column (1151). The guide tube (1152) passes through the groove wall of the lower arc groove (113) to the outside of the lower mold (102). After the guide tube (1152) passes through, it is equipped with a pressure relief valve (1153). The pressure relief direction of the pressure relief valve (1153) is downward corresponding to the water collecting groove (342). The interior of the positioning column (1151) is hollow. The end of the positioning column (1151) away from the guide tube (1152) is provided with a conical guide part (1154), and the axis of the guide part (1154) is processed with a pressure relief hole (1155).

7. The water swelling forming device according to claim 4, characterized in that: The vertical sliding drive unit (4) comprises an upper platform (41) and a telescopic rod (42); a plurality of guide shafts (43) are arranged between the upper platform (41) and the base (2); the telescopic rod (42) is fixed to the top of the upper platform (41); the telescopic end of the telescopic rod (42) passes downward through the upper platform (41) and is fixedly connected to the upper mold (101); a guide plate (121) is arranged on the outer side of the upper mold (101); the guide shaft (43) passes through the guide plate (121); the upper mold (101) and the frame (110) are clearance-matched; The bottom of the upper mold (101) is provided with an upper mold groove (122) corresponding to the lower mold groove (111), and an upper mold (123) matching the lower mold (112) is embedded in the upper mold groove (122). The bottom of the upper mold (101) is provided with an upper arc groove (124) corresponding to the lower arc groove (113). The lower arc groove (113) and the upper arc groove (124) are combined to form a channel. The formed pipe is positioned in the channel, and the booster device (5) enters along the channel formed by the combination of the lower arc groove (113) and the upper arc groove (124).

8. The water swelling forming device according to claim 7, characterized in that: The boosting device (5) comprises a pipeline (51), a lower support (514) is arranged at the bottom of the pipeline (51), a second slide bar (515) matching the slide groove is arranged on the outer wall of the lower support (514), the lower support (514) has a first threaded hole (516) matching the first screw rod, a pipe cover (52) is arranged at one end of the pipeline (51), a movable pipe (53) is movably mounted at the axis of the pipe cover (52), one end of the movable pipe (53) is inserted into the pipeline (51) through the pipe cover (52), a piston (54) is installed at the end, a sealing ring (55) is arranged on the outer wall of the piston (54), and a seal is formed between the sealing ring (55) and the inner wall of the pipeline (51), and a hydraulic telescopic rod (56) is fixed at the other end of the pipeline (51), and the movable end of the hydraulic telescopic rod (56) is inserted into the pipeline (51) and then The movable pipe (53) is provided with a first piston (57), the outer wall of which is provided with a first sealing ring (58), the outer wall of which is provided with a water inlet pipe (59) and a drain pipe (510), the water inlet pipe (59) and the drain pipe (510) are both provided with valves (511), a spring (512) is sleeved on the movable pipe (53), the spring (512) is fixed between the pipe cover (52) and the piston (54), an adjusting device (6) is installed between the pipe (51) and the pipe cover (52), a sealing ring (513) is clamped at the pipe mouth of the movable pipe (53), the movable pipe (53) enters along the channel formed by the lower arc groove (113) and the upper arc groove (124), after entering, a seal is formed between the sealing ring (513) and the inner wall of the channel, and the end face of the sealing ring (513) forms a seal with the end face of the formed pipe fitting.

9. The water swelling forming device according to claim 8, characterized in that: A sliding plate (553) is sleeved on the outside of the movable tube (53), and the sliding plate (553) slides along the axial direction of the movable tube (53). A second spring (554) is sleeved on the movable tube (53), and the second spring (554) is fixed between the sliding plate (553) and the tube cover (52). A sealing sheet (555) is provided at the end of the sliding plate (553) away from the tube cover (52). When the movable tube (54) is inserted into the channel constructed by the lower arc groove (113) and the upper arc groove (124), the sealing sheet (555) seals at the channel opening.

10. The water swelling forming device according to claim 8, characterized in that: The adjusting device (6) comprises a guide sleeve (61) and a threaded sleeve (62); a clamping ring (63) is arranged on the outer wall of the guide sleeve (61); the clamping ring (63) is clamped between the pipe (51) and the pipe cover (52); an external thread is processed on the outside of the threaded pipe (62); the threaded pipe (62) and the guide sleeve (61) are threadedly matched; the movable pipe (53) passes through the axis of the threaded sleeve (62); and the right end of the movable pipe (53) forms a limit for the sliding of the piston (54).

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