Die-casting forming equipment based on uniform heating

Abstract

The invention belongs to the technical field of valve machining, and particularly relates to die-casting forming equipment based on uniform heating, the equipment comprises a stamping forming machine, a lower die workbench and an upper die mounting table, the lower die workbench and the upper die mounting table are arranged on the stamping forming machine, a rotatable die sleeve is arranged on the lower die workbench, and a cavity for limiting a valve body is formed in the die sleeve; a plurality of stamping heads capable of expanding in the radial direction are arranged below the upper die mounting table, heating rod pieces are embedded in the stamping heads, a high-frequency heating device is arranged on one side of the stamping forming machine, a heating element of the high-frequency heating device is located above the die sleeve and used for preheating the outer wall of the valve body, and the heating rod pieces are connected with the high-frequency heating device and used for conducting synchronous heat compensation on the inner wall of the valve body during stamping to form internal and external cooperative heating. After the stamping head descends, the conical body in the stamping head drives the flaps to evenly expand outwards and shape the inner wall of the valve body, when the upper die is reset, the driving assembly drives the die sleeve to rotate, and the next extrusion position is changed, the inner portion and the outer portion of the valve body are evenly heated and stressed in the shaping process, and cracking, deformation and uneven wall thickness are effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of valve processing technology, and in particular to a die-casting molding equipment based on uniform heating. Background Technology

[0002] In the field of die casting of valve body parts, the shaping process is a key step to ensure the dimensional accuracy and surface quality of the workpiece. Its core requirement is to form the workpiece into a preset shape through stamping, while avoiding defects such as cracking, deformation, and uneven wall thickness. Currently, die casting equipment on the market still has many technical pain points when shaping such workpieces, making it difficult to meet the needs of efficient and high-precision production.

[0003] Most existing die-casting equipment uses a single external heating method, which involves preheating the exterior of the workpiece before it is sent into the forming mechanism. This heating method has obvious problems with uneven heating. Due to the slow heat transfer inside the workpiece, the external temperature is prone to being too high while the internal temperature is insufficient. In addition, the long transfer time after heating leads to a large difference in plasticity between the inside and outside of the workpiece. During the subsequent stamping and forming process, defects such as cracking and deformation are very likely to occur due to uneven stress distribution, which seriously affects the yield of finished products. Although some equipment has tried to improve the heating structure, it has not yet achieved synchronous heating of the inside and outside of the workpiece, and the heating uniformity is difficult to guarantee.

[0004] Meanwhile, the workpiece is prone to circumferential displacement or axial movement during the stamping process, resulting in excessive dimensional deviations after forming. The upper die's stamping structure is often a rigid, integral design, making it difficult to achieve uniform expansion stamping according to the workpiece's structure. This often leads to uneven stress on the upper and lower parts of the workpiece, resulting in uneven wall thickness and affecting subsequent assembly and performance. Furthermore, this valve is made by cutting, rolling, and welding steel plates, which can easily cause friction at the weld joints during stamping, affecting weld quality. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings in the prior art by proposing a die-casting molding device based on uniform heating.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A die-casting molding apparatus based on uniform heating, comprising: A stamping forming machine, the stamping forming machine including a lower die worktable and an upper die mounting table; A lower mold assembly is disposed on the lower mold worktable. The lower mold assembly includes a device base and a mold sleeve rotatably connected to its top. The mold sleeve has a cavity for accommodating the valve body. An upper die assembly is disposed on the upper die mounting platform. The upper die assembly includes a mounting base and multiple stamping heads. The multiple stamping heads are movably disposed at the bottom of the mounting base and together form a cylindrical truncated cone shape. A fixing rod is also fixed at the bottom of the mounting base. A conical body is sleeved on the fixing rod. The inner side of the stamping head is provided with a relief groove II that is adapted to the conical body. When the upper die assembly descends and the stamping head enters the valve body, the conical body and the relief groove II cooperate to drive the stamping head to expand outward. A high-frequency heating device, wherein the heating element is located on one side of the stamping machine, is used to preheat the outer wall of the valve body; Additionally, a heating rod is embedded in the outer wall of the stamping head and electrically connected to the high-frequency heating device via a wire. This rod is used to simultaneously heat the inner wall of the valve body when the stamping head contacts the valve body, thereby achieving uniform heating of the inner and outer walls of the valve body.

[0007] As a further improvement to the above technical solution: A sliding column is slidably inserted through the inner bottom end of the stamping head. The bottom ends of multiple sliding columns are connected by a connecting column. The bottom end of the fixed rod is elastically connected to the connecting column through an extension rod and spring II. When the stamping head descends to the point where the connecting column contacts the lower die worktable, the spring II is compressed, and the stamping head can continue to descend relative to the connecting column and the fixed rod to achieve expansion.

[0008] A sliding rod I is fixed to the outer side of the top of the stamping head. The sliding rod I passes through the clearance hole in the side wall of the mounting base and passes through a sliding ring. A tension spring is sleeved on the sliding rod I. The two ends of the tension spring are respectively connected to the outer end of the sliding rod I and the sliding ring. The tension spring is configured to be stretched when the stamping head expands and to provide a pulling force to reset the stamping head when the upper die assembly rises.

[0009] It also includes a drive assembly, which includes a gear ring fixed to the outer wall of the mold sleeve, a rotating ring rotatably disposed on the equipment base, a transmission gear sleeved on the rotating ring and meshing with the gear ring via a one-way bearing, and a drive rod disposed through the rotating ring; The outer wall of the drive rod is provided with a spiral guide groove and a straight guide groove that connects its two ends respectively, and the inner wall of the rotating ring is fixed with a sliding block that slides in the guide groove. The drive rod is configured to be pressed down when the upper mold assembly moves downward and to rise under the action of a restoring force when the upper mold assembly rises back. The rotating ring and the mold sleeve are driven to rotate through the cooperation of the sliding block and the spiral guide groove, so as to change the circumferential position of the valve body in the mold sleeve.

[0010] The bottom end of the drive rod is elastically connected to the equipment base via guide rod I and spring I. Spring I is configured to store energy when the drive rod is pressed down and release energy when the upper mold assembly rises to drive the drive rod to reset and rise.

[0011] It also includes a robotic arm device, which includes a support frame, a fixed base that is horizontally movable on the support frame, a drive cylinder mounted on the fixed base, and a clamping chuck that is driven to rise and fall by the drive cylinder. The clamping chuck is used to clamp the valve body and transfer it between the heating element and the cavity of the mold sleeve.

[0012] The support frame is rotatably equipped with a transmission screw and a sliding worktable driven by it. The fixed base is connected to the sliding worktable through a sliding rod II to achieve synchronous horizontal movement. The fixed base is also equipped with a guide rod II, the top end of which is fixedly connected to the mounting plate on which the clamping chuck is installed to guide its lifting and lowering movement.

[0013] The heating element of the high-frequency heating device is fixed to the top of the stamping machine by a mounting bracket and is located above the feed side of the die sleeve; the heating rod is embedded in the mounting groove II on the outer wall of the stamping head, and its heating surface is flush with the outer wall of the stamping head.

[0014] The bottom end of the cavity is provided with a limiting seat for axially limiting the valve body placed inside. Two conical bodies are provided, spaced apart and fitted onto the fixed rod to provide a smooth expansion driving force when the stamping head moves downward.

[0015] Beneficial effects: In this invention, a die-casting molding equipment based on uniform heating preheats the outer wall of the valve body through the heating element of a high-frequency heating device, while simultaneously supplementing the heating of the inner wall of the valve body by embedding a heating rod on the outer wall of the stamping head, forming an internal and external synergistic heating structure. This ensures uniform heating of the inner and outer walls of the valve body, avoids plasticity differences caused by excessive local temperature differences, significantly reduces the risk of valve body cracking and deformation during the forming process, and improves the finished product qualification rate. Furthermore, the heating rod is set in close contact with the stamping head, and the heat transfer is direct and efficient. Combined with the simultaneous supplementing of heat during the stamping operation, it further ensures that the valve body is formed in the optimal plastic state, improving the dimensional accuracy and surface quality of the formed valve body. In this invention, the die-casting molding equipment based on uniform heating achieves preliminary and accurate positioning of the valve body through the limiting seat of the lower mold assembly with anti-slip texture, preventing the valve body from shifting or rotating during the forming process; the conical body of the upper mold assembly precisely matches the relief groove II of the stamping head, driving the stamping head to expand outward smoothly, so that the stamping head acts evenly on the inner wall of the valve body, ensuring that the force on each part of the valve body is consistent, effectively improving the problem of uneven valve body wall thickness after forming by traditional equipment. At the same time, the drive assembly can drive the mold sleeve and valve body to rotate during stamping reset, changing the subsequent expansion and extrusion position, making the overall force on the valve body more uniform, further improving the processing accuracy, and at the same time avoiding friction between the stamping head and the weld. In this invention, the die-casting molding equipment based on uniform heating can automatically clamp, transfer, and load / unload valve bodies through a robotic arm device without manual intervention. This effectively reduces errors and inefficiencies caused by manual operation, while also reducing the labor intensity of operators. The robotic arm device achieves smooth movement through the cooperation of the transmission screw and the sliding rod II, and the guide rod II ensures stable clamping and lifting, ensuring accurate and efficient loading and unloading. It can achieve continuous operation and significantly improve overall production efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a die-casting molding equipment based on uniform heating proposed in this invention; Figure 2 This is a schematic diagram of the lower mold assembly structure of a die-casting molding equipment based on uniform heating proposed in this invention; Figure 3 This is a schematic diagram of the drive component structure of a die-casting molding equipment based on uniform heating proposed in this invention; Figure 4 This is a schematic cross-sectional view of the mold sleeve structure of a die-casting equipment based on uniform heating proposed in this invention; Figure 5 This is a cross-sectional view of the upper mold assembly of a die-casting equipment based on uniform heating proposed in this invention. Figure 6 This is a schematic diagram of the heating rod installation structure of a die-casting molding equipment based on uniform heating proposed in this invention; Figure 7 This is a schematic diagram of a robotic arm device for a die-casting molding equipment based on uniform heating, as proposed in this invention. Figure 8 This is a schematic diagram of the valve manufacturing process.

[0017] In the diagram: 1. Stamping machine; 11. Lower die worktable; 12. Upper die mounting table; 13. Electrical control device; 2. Lower die assembly; 21. Equipment base; 22. Die sleeve; 221. Cavity; 222. Limiting seat; 23. Gear ring; 24. Rotating ring; 25. Transmission gear; 26. Protective cover; 27. Drive rod; 271. Spiral guide groove; 272. Linear guide groove; 273. Sliding block; 274. Positioning nut sleeve; 28. Guide rod I; 29. ​​Spring I; 3. Upper die assembly; 31. Mounting base; 311. Clearance hole; 32. Mounting groove I; 33. Fixing rod; 34. Conical body; 35. Stamping 351. Head; 352. Sliding through hole; 353. Sliding column; 354. Connecting column; 355. Extension rod; 356. Spring II; 357. Clearance groove I; 358. Mounting groove II; 36. Heating rod; 37. Sliding ring; 38. Sliding rod I; 39. Tension spring; 4. High-frequency heating device; 41. Heating element; 5. Mounting bracket; 6. Robotic arm device; 61. Support frame; 62. Sliding worktable; 63. Drive motor; 64. Transmission screw; 65. Sliding rod II; 66. Fixed base; 67. Drive cylinder; 68. Mounting plate; 69. Guide rod II; 610. Clamping chuck. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Example 1 Reference Figures 1-8 A die-casting molding equipment based on uniform heating is used in the field of valve processing. It includes: a stamping molding machine 1, a lower die worktable 11 and an upper die mounting table 12, which are fixed to the corresponding positions of the stamping molding machine 1 by bolts. The top surface of the lower die worktable 11 is machined with a flat mounting surface to ensure that the subsequent parts are flat and do not shake after installation. The equipment is also equipped with a lower die assembly 2, an upper die assembly 3, a drive assembly, a high-frequency heating device 4, and a mounting bracket 5.

[0020] The lower mold assembly 2 is located on top of the lower mold worktable 11. The equipment base 21 is connected to the mounting surface of the lower mold worktable 11 by multiple evenly distributed bolts. The top of the equipment base 21 is machined with an annular groove, and the bottom of the mold sleeve 22 is provided with an annular boss that matches the annular groove. The annular boss rotates within the annular groove via a bearing, enabling the mold sleeve 22 to be rotatably assembled. The cavity 221 inside the mold sleeve 22 is used to accommodate the valve body to be processed. The limiting seat 222 at the bottom of the cavity 221 is integrally formed on the inner wall of the cavity 221. After the valve body is placed into the cavity 221, its bottom abuts against the limiting seat 222.

[0021] The upper mold assembly 3 is installed at the bottom of the upper mold mounting platform 12. The mounting base 31 is connected to the bottom of the upper mold mounting platform 12 by multiple bolts. The bolts are evenly distributed to ensure a firm connection and uniform force distribution. The bottom surface of the mounting base 31 has an annular mounting groove I 32. Multiple stamping heads 35 are evenly distributed in the mounting groove I 32 and are spliced ​​to form a cylindrical frustum structure that is adapted to the shape of the valve body. The fixing rod 33 is fixed to the bottom center of the mounting groove I 32 by welding. Two conical bodies 34 are fitted on its outer wall at intervals. The conical bodies 34 and the fixing rod 33 are integrally formed. Each stamping head 35 has an inner sidewall with a relief groove II 36 that matches the outer wall of the conical body 34. The groove wall of the relief groove II 36 is an inclined surface that fits completely with the inclined surface of the conical body 34. When the stamping machine 1 drives the upper mold mounting table 12 to move the upper mold assembly 3 downward, the stamping head 35 moves down synchronously with the mounting base 31. When the stamping head 35 is in place, the inclined surface of the conical body 34 and the inclined surface of the relief groove II 36 abut against each other. With the pressure of the upper mold assembly 3 continuing to move downward, the conical body 34 pushes the stamping head 35 to expand outward, so that the outer sidewall of the stamping head 35 fits against the inner wall of the valve body to complete the shaping operation.

[0022] A mounting bracket 5 is welded and fixed to the top crossbeam of the stamping forming machine 1. A high-frequency heating device 4 is located on one side of the stamping forming machine 1. A mounting hole is machined on one side of the mounting bracket 5. The heating element 41 of the high-frequency heating device 4 is installed in the mounting hole, and the heating element 41 is adapted to the shape of the valve body to ensure that the heat can be accurately applied to the outside of the valve body. Each stamping head 35 has a mounting groove II 357 extending along its own length on its outer wall. The heating rod 358 is embedded in the mounting groove II 357. The surface of the heating rod 358 is flush with the outer wall of the stamping head 35 to avoid protrusion affecting the fit with the valve body. The heating rod 358 is connected to the high-frequency heating device 4 through a wire. The wire is arranged through a pre-set wiring hole inside the mounting base 31 to prevent the wire from being tangled or damaged during equipment operation. After the valve body is placed inside the heating element 41, the high-frequency heating device 4 is activated, and the heating element 41 preheats the outside of the valve body. When the valve body is placed inside the mold sleeve 22, the heating rod 358 heats up simultaneously. When the stamping head 35 contacts the valve body, the heating rod 358 directly heats the inner wall of the valve body, ensuring that the inner and outer walls of the valve body are heated evenly.

[0023] A sliding through hole 351 is provided at the bottom inner side of the stamping head 35. The inner wall of the sliding through hole 351 is polished smooth. The sliding column 352 is slidably disposed in the sliding through hole 351, and both ends of the sliding column 352 extend to the outside of the sliding through hole 351. The connecting column 353 has a cylindrical structure, and the ends of multiple sliding columns 352 are fixedly connected to the connecting column 353 to form an integral support structure. When the stamping head 35 moves downward, the connecting column 353 first contacts the top surface of the lower die worktable 11. As the stamping head 35 continues to move downward, the sliding column 352 slides along the sliding through hole 351 to achieve buffering. The bottom end of the fixed rod 33 is machined with a guide hole, and the top end of the extension rod 354 is inserted into the guide hole to achieve a sliding fit between the two. The top center of the connecting column 353 is provided with a relief groove I 356. The bottom end of the extension rod 354 is fixed to the bottom wall of the relief groove I 356 by welding. The spring II 355 is sleeved on the outer wall of the extension rod 354, and its two ends abut against the bottom of the fixed rod 33 and the bottom wall of the relief groove I 356 respectively. The spring II 355 is in a slightly compressed state in its natural state to ensure the connection stability between the extension rod 354 and the fixed rod 33. When the stamping head 35 expands and shapes, the spring II 355 is further compressed. When the upper die assembly 3 rises, the spring II 355 resets, driving the sliding column 352 and the connecting column 353 to return to their positions.

[0024] A sliding rod I 38 is welded to the outer side of the top of the stamping head 35. Each stamping head 35 has one sliding rod I 38, symmetrically distributed on both sides of the stamping head 35. An clearance hole 311 is provided through the outer sidewall of the mounting base 31. The diameter of the clearance hole 311 is slightly larger than the diameter of the sliding rod I 38. The middle section of the sliding rod I 38 passes through the clearance hole 311 and is located inside the hole, ensuring smooth sliding of the sliding rod I 38. A sliding ring 37 is sleeved on the outer wall of the mounting base 31. Its inner wall is tightly fitted to the outer wall of the mounting base 31 and can slide along the axial direction of the mounting base 31. Multiple sliding rods I 38 pass through the sliding ring 37. A tension spring 39 is sleeved on the outer wall of the sliding rod I 38. The two ends of the tension spring 39 are connected to the outer ends of the sliding rod I 38 and the outer wall of the sliding ring 37 respectively via hooks. The hooks are detachably connected to the sliding rod I 38 and the sliding ring 37 for easy maintenance and replacement. When the stamping head 35 is opened by the conical body 34, the sliding rod I 38 slides outward with the stamping head 35, and at the same time stretches the tension spring 39; after the upper die assembly 3 rises and the conical body 34 is located in the relief groove II 36, the tension spring 39 contracts and drives the sliding rod I 38 to slide inward, thereby driving the stamping head 35 to return to the mounting groove I 32.

[0025] The drive assembly is located on the top of the equipment base 21. The gear ring 23 is fixedly sleeved on the outer wall of the mold sleeve 22 via a key connection, which ensures that the gear ring 23 and the mold sleeve 22 rotate synchronously. A stepped hole is machined on the top of the equipment base 21, and an annular step is machined on the outer wall of the rotating ring 24. The annular step rotates within the stepped hole via a bearing, enabling the rotating ring 24 to rotate through the hole and reducing resistance during rotation. The transmission gear 25 is sleeved on the outer wall of the rotating ring 24 via a one-way bearing. The inner ring of the one-way bearing is interference-fitted with the outer wall of the rotating ring 24, and the outer ring is interference-fitted with the inner wall of the transmission gear 25. The one-way bearing ensures that the transmission gear 25 drives the rotating ring 24 to rotate in only one direction, avoiding reverse transmission. The transmission gear 25 meshes with the gear ring 23. Furthermore, a protective cover 26 is fitted over the outside of the mold sleeve 22, protecting the gear ring 23 and the transmission gear 25 and preventing external impurities from entering the meshing area. The drive rod 27 is installed inside the rotating ring 24. A top block is machined at the top of the drive rod 27, which can make precise contact with the bottom surface of the mounting base 31. The outer wall of the drive rod 27 is integrally machined with a spiral guide groove 271 and two straight guide grooves 272. The two straight guide grooves 272 are respectively connected to the two ends of the spiral guide groove 271. A sliding block 273 is fixed to the inner wall of the rotating ring 24 by bolts. The end of the sliding block 273 is embedded in the spiral guide groove 271 or the straight guide groove 272. The end of the sliding block 273 is also embedded with a ball to reduce friction with the guide groove. When the stamping head 35 moves downward, the bottom surface of the mounting base 31 abuts against the top block of the drive rod 27, causing the drive rod 27 to slide down. At this time, the sliding block 273 slides along the linear guide groove 272, and the rotating ring 24 remains stationary. When the upper die assembly 3 rises, the drive rod 27 resets, the sliding block 273 slides along the spiral guide groove 271, causing the rotating ring 24 to rotate. This, in turn, drives the transmission gear 25 through the one-way bearing to rotate the gear ring 23 and the die sleeve 22, changing the expansion and extrusion position of the valve body. This makes the force on the valve body more uniform after shaping and avoids wear at the welded position.

[0026] The bottom end of the drive rod 27 is machined with a sliding sleeve. The bottom end of the guide rod I 28 is fixed to the bottom wall of the equipment base 21 by bolts. The sliding sleeve is fitted onto the outer wall of the guide rod I 28, realizing a sliding fit between the drive rod 27 and the guide rod I 28. The spring I 29 is fitted onto the outer wall of the guide rod I 28 and is located between the sliding sleeve and the bottom wall of the equipment base 21. In its natural state, the spring I 29 supports the sliding sleeve, keeping the drive rod 27 in its initial position. When the drive rod 27 slides down, the sliding sleeve compresses the spring I 29; after the mounting base 31 rises, the spring I 29 elastically resets, pushing the sliding sleeve and the drive rod 27 back to their original positions to realize subsequent transmission actions.

[0027] The bottom outer wall of the drive rod 27 is also threaded with a positioning nut sleeve 274. The top of the positioning nut sleeve 274 abuts against the bottom wall of the equipment base 21. By adjusting the height of the positioning nut sleeve 274, the reset formation of the drive rod 27 can be controlled, thereby controlling the rotation angle of the mold sleeve 22.

[0028] Example 2 refer to Figures 1-8 An improvement on Embodiment 1: A die-casting molding equipment based on uniform heating further includes a robotic arm device 6. The robotic arm device 6 includes a support frame 61, which is bolted to one side of the stamping machine 1 to ensure stability and prevent wobbling. A transmission screw 64 is fixed to the top of the support frame 61 via a bearing seat, and the bearing seat is bolted to the support frame 61 for easy disassembly and maintenance. A slider is machined on the bottom surface of the sliding worktable 62, and a guide rail is correspondingly machined on the top of the support frame 61. The slider and guide rail slide together to improve the smoothness of the movement of the sliding worktable 62. A ball nut is bolted to the bottom of the sliding worktable 62 and slides on the transmission screw 64. A drive motor 63 is fixed to one side of the support frame 61 via a motor seat, and the motor seat is welded to the support frame 61. The output end of the drive motor 63 is connected to the transmission screw 64 via a coupling, which compensates for the coaxiality error between the output shaft of the drive motor 63 and the transmission screw 64. A guide sleeve is welded to one side of the support frame 61. A sliding rod II 65 passes through the guide sleeve. Both ends of the sliding rod II 65 are connected to the fixed base 66 and the sliding worktable 62 respectively via flanges. The flange connection ensures a secure connection. The inner wall of the guide sleeve is polished smooth to reduce friction when the sliding rod II 65 slides. After the drive motor 63 starts, the output shaft drives the transmission screw 64 to rotate. The ball nut drives the sliding worktable 62 to move along the guide rail. The sliding worktable 62, through the sliding rod II 65, drives the fixed base 66 to move horizontally synchronously.

[0029] A drive cylinder 67 is fixed to the bottom of the fixed base 66 via a cylinder seat, which is bolted to the fixed base 66. The output end of the drive cylinder 67 extends to the top of the fixed base 66 and is threaded to the mounting plate 68, and is also locked with a nut to prevent loosening. A clamping chuck 610 is bolted to the bottom of the mounting plate 68. The clamping claws of the clamping chuck 610 have rubber pads machined on their outer walls to prevent damage to the inner wall of the valve body during clamping. Two guide holes are provided through the top of the fixed base 66, and guide sleeves are provided in the guide holes. Guide rods II 69 pass through the guide sleeves and their top ends are bolted to the mounting plate 68. The two guide rods II 69 are symmetrically distributed on both sides of the drive cylinder 67 to improve the stability of the mounting plate 68 during lifting and lowering. After the drive cylinder 67 is started, the output end drives the mounting plate 68 and the clamping chuck 610 to rise and fall. The clamping chuck 610 can clamp and release the valve body. The robotic arm device 6 can realize the automatic loading and unloading of the valve body without manual intervention.

[0030] It also includes an electrical control device 13, which is a programmable logic controller (PLC). It is electrically connected to the stamping machine 1, the high-frequency heating device 4, the drive motor 63, and the drive cylinder 67, respectively. It is used to control the orderly and coordinated operation of each component according to a preset program to realize the automatic heating, feeding, stamping and shaping, mold sleeve 22 rotation and unloading process. It is also equipped with a dual start button to improve safety.

[0031] The working process of the device is as follows: the valve body is placed inside the heating element 41 by hand, and the bottom of the valve body is in contact with the mounting bracket 5. The high-frequency heating device 4 is started, and the heating element 41 and the heating rod 358 heat up simultaneously. The heat of the heating element 41 is directly applied to the outside of the valve body until it is heated to the specified temperature. The drive motor 63 of the robotic arm device 6 starts, driving the transmission screw 64 to rotate through the coupling. The ball nut drives the sliding worktable 62 to move along the guide rail. The sliding worktable 62 drives the fixed base 66 to move above the heating element 41 through the sliding rod II 65. Then, the drive cylinder 67 starts, and the output end drives the mounting plate 68 and the clamping chuck 610 to descend. The clamping claws of the clamping chuck 610 open, align with the valve body, and expand. The rubber pad adheres to the inner wall of the valve body to achieve a firm grip. The drive cylinder 67 resets and drives the valve body to rise. The drive motor 63 starts again, driving the fixed base 66 to move above the lower mold assembly 2. The drive cylinder 67 descends again, slowly placing the valve body into the cavity 221. The bottom of the valve body is engaged in the limiting seat 222. The limiting seat 222 and the bottom of the valve body achieve precise initial positioning. The clamping chuck 610 opens to release the valve body, and the robotic arm device 6 resets.

[0032] When the stamping machine 1 is started, the upper mold mounting table 12 drives the upper mold assembly 3 to descend smoothly. The mounting base 31 drives the stamping head 35 to gradually approach the valve body until the bottom end of the connecting column 353 is in contact with the top of the lower mold worktable 11. The heat from the heating rod 358 is transferred to the inside of the valve body through the stamping head 35, ensuring that the inner and outer walls of the valve body are heated at the same time and the overall heating is uniform.

[0033] As the upper die assembly 3 continues to descend, the conical body 34 gradually embeds into the relief groove II 36. The inclined surface of the conical body 34 interacts with the inclined surface of the relief groove II 36, pushing the stamping head 35 to expand outward. The outer wall of the stamping head 35 fits against the inner wall of the valve body. With continuous pressure, the shaping operation is completed. At the same time, the sliding sleeve of the drive rod 27 is pushed down along the guide rod I 28. During the descent, the drive sliding block 273 slides from the spiral guide groove 271 to the top of the upper straight guide groove 272. Due to the action of the one-way bearing, the transmission gear 25 will not rotate.

[0034] After the forming is completed, the stamping machine 1 drives the upper die mounting platform 12 to lift the upper die assembly 3, and the mounting base 31 drives the stamping head 35 to move upward synchronously. The conical body 34 gradually disengages from the clearance groove II 36, and the tension spring 39 contracts to drive the sliding rod I 38 to slide inward, thereby driving the stamping head 35 to return to the mounting groove I 32. At the same time, the spring I 29 elastically returns to its original position, pushing the sliding sleeve of the drive rod 27 to move upward along the guide rod I 28. The drive rod 27 moves upward synchronously, and the sliding block 273 moves downward in the linear guide groove 272. During this process, the transmission gear 25 still does not rotate. When the sliding block 273 moves into the spiral guide groove 271, the rotating ring 24 drives the transmission gear 25 to rotate through the one-way bearing. The transmission gear 25 drives the meshing gear ring 23 to rotate, thereby driving the die sleeve 22 and the valve body to rotate synchronously, changing the subsequent expansion and extrusion position of the valve body until the stamping is completely completed.

[0035] Finally, the robotic arm device 6 moves again above the cavity 221, the clamping chuck 610 picks up the shaped valve body, moves it to the finished product area to release it, and completes one processing cycle. After that, the equipment can repeat the above process to achieve continuous operation.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A die-casting molding equipment based on uniform heating, characterized in that, include: A stamping forming machine (1) includes a lower die worktable (11) and an upper die mounting table (12). The lower mold assembly (2) is disposed on the lower mold worktable (11). The lower mold assembly (2) includes a device base (21) and a mold sleeve (22) rotatably connected to its top. The mold sleeve (22) is provided with a cavity (221) for accommodating the valve body. The upper die assembly (3) is set on the upper die mounting platform (12). The upper die assembly (3) includes a mounting base (31) and multiple stamping heads (35). The multiple stamping heads (35) are movably set at the bottom of the mounting base (31) and together form a cylindrical truncated cone. A fixing rod (33) is also fixed at the bottom of the mounting base (31). A conical body (34) is sleeved on the fixing rod (33). The inner side of the stamping head (35) is provided with a relief groove II (36) that is adapted to the conical body (34). When the upper die assembly (3) moves downward and the stamping head (35) enters the valve body, the conical body (34) cooperates with the relief groove II (36) to drive the stamping head (35) to expand outward. The high-frequency heating device (4) has a heating element (41) located on one side of the stamping machine (1) for preheating the outer wall of the valve body; In addition, a heating rod (358) is embedded in the outer wall of the stamping head (35) and electrically connected to the high-frequency heating device (4) through a wire. It is used to synchronously heat the inner wall of the valve body when the stamping head (35) contacts the valve body, thereby achieving uniform heating of the inner and outer walls of the valve body.

2. The die-casting equipment based on uniform heating according to claim 1, characterized in that, The inner bottom end of the stamping head (35) is slidably provided with a sliding column (352). The bottom ends of multiple sliding columns (352) are connected by a connecting column (353). The bottom end of the fixed rod (33) is elastically connected to the connecting column (353) through an extension rod (354) and a spring II (355). When the stamping head (35) descends to the point where the connecting column (353) contacts the lower die worktable (11), the spring II (355) is compressed, and the stamping head (35) can continue to descend relative to the connecting column (353) and the fixed rod (33) to achieve expansion.

3. The die-casting equipment based on uniform heating according to claim 2, characterized in that, A sliding rod I (38) is fixed to the outer side of the top of the stamping head (35). The sliding rod I (38) passes through the clearance hole (311) on the side wall of the mounting base (31) and passes through a sliding ring (37). A tension spring (39) is sleeved on the sliding rod I (38). The two ends of the tension spring (39) are respectively connected to the outer end of the sliding rod I (38) and the sliding ring (37). The tension spring (39) is configured to be stretched when the stamping head (35) expands and to provide a pulling force to reset the stamping head (35) when the upper die assembly (3) rises.

4. The die-casting equipment based on uniform heating according to any one of claims 1 to 3, characterized in that, It also includes a drive assembly, which includes a gear ring (23) fixed to the outer wall of the mold sleeve (22), a rotating ring (24) rotatably disposed on the equipment base (21), a transmission gear (25) sleeved on the rotating ring (24) and meshing with the gear ring (23) via a one-way bearing, and a drive rod (27) disposed through the rotating ring (24). The outer wall of the drive rod (27) is provided with a spiral guide groove (271) and a straight guide groove (272) that connects its two ends respectively. The inner wall of the rotating ring (24) is fixed with a sliding block (273) that slides in the guide groove. The drive rod (27) is configured to be pressed down when the upper mold assembly (3) moves downward and rise under the action of the reset force when the upper mold assembly (3) rises. The rotating ring (24) and the mold sleeve (22) are driven to rotate by the cooperation of the sliding block (273) and the spiral guide groove (271) to change the circumferential position of the valve body in the mold sleeve (22).

5. The die-casting equipment based on uniform heating according to claim 4, characterized in that, The bottom end of the drive rod (27) is elastically connected to the equipment base (21) via guide rod I (28) and spring I (29). The spring I (29) is configured to store energy when the drive rod (27) is pressed down and release energy when the upper mold assembly (3) rises to drive the drive rod (27) to reset and rise.

6. The die-casting equipment based on uniform heating according to claim 1, characterized in that, It also includes a robotic arm device (6), which includes a support frame (61), a fixed base (66) that is horizontally movable on the support frame (61), a drive cylinder (67) mounted on the fixed base (66), and a clamping chuck (610) that is driven to rise and fall by the drive cylinder (67). The clamping chuck (610) is used to clamp the valve body and transfer it between the heating element (41) and the cavity (221) of the mold sleeve (22).

7. The die-casting equipment based on uniform heating according to claim 6, characterized in that, The support frame (61) is rotatably provided with a transmission screw (64) and a sliding worktable (62) driven by it. The fixed base (66) is connected to the sliding worktable (62) through a sliding rod II (65) to achieve synchronous horizontal movement. The fixed base (66) is also provided with a guide rod II (69), the top end of which is fixedly connected to the mounting plate (68) on which the clamping chuck (610) is mounted, so as to guide its lifting and lowering movement.

8. The die-casting equipment based on uniform heating according to claim 1, characterized in that, The heating element (41) of the high-frequency heating device (4) is fixed to the top of the stamping machine (1) by a mounting bracket (5) and located above the feed side of the die sleeve (22). The heating rod (358) is embedded in the mounting groove II (357) on the outer wall of the stamping head (35), and its heating surface is flush with the outer wall of the stamping head (35).

9. The die-casting equipment based on uniform heating according to claim 2, characterized in that, The bottom end of the cavity (221) is provided with a limiting seat (222) for limiting the bottom axial position of the inserted valve body; Two cones (34) are provided, which are fitted onto the fixed rod (33) at intervals to provide a smooth expansion driving force when the punch head (35) moves downward.

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