Aluminum alloy precision die forging stretching equipment

Abstract

The invention discloses aluminum alloy precision die forging stretching equipment, and relates to the technical field of forging stretching, the aluminum alloy precision die forging stretching equipment comprises a working table, a carrying table is arranged above the working table, an annular ring is arranged outside the carrying table, a telescopic column inserted into the working table is arranged at the bottom of the annular ring, a rectangular frame is arranged above the working table, and a plurality of extrusion parts are arranged in the rectangular frame; the extrusion part comprises an arc-shaped plate above the carrying table, a sliding rod is arranged on the side face of the arc-shaped plate, and a fixing cylinder is arranged on the outer wall of the sliding rod; according to the equipment, by arranging the annular ring, the telescopic columns, the extrusion parts, the centering unit, the feeding unit and other structures, precise feeding and centering positioning of the circular blank are achieved, and the problems that in the prior art, feeding and discharging are disjointed with precise alignment, and it cannot be guaranteed that the blank is precisely placed in a die cavity are solved.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy forging stretching technology, specifically to a stretching equipment for precision aluminum alloy forgings. Background Technology

[0002] In the field of precision stretching and forming of aluminum alloy round cookware, achieving production automation is a key direction for improving efficiency and consistency. To this end, some automated solutions aimed at replacing manual loading and unloading have emerged in the existing technology. For example, Chinese Patent Publication No. CN221289183U discloses an "Automatic Aluminum Plate Loading Device for Aluminum Pot Processing." This device uses a gripping component to pick up aluminum plates or aluminum pots. This solution represents an effort towards single-machine automation; its core concept is to use mechanical clamping to initially automate the loading action, alleviating the pressure on efficiency and safety of manual operation to some extent.

[0003] However, after in-depth analysis, such existing automation solutions still have significant limitations and fail to fundamentally meet the process requirements of precision drawing of high-end aluminum alloy cookware. The specific shortcomings are as follows: The core function of this solution focuses on material loading and unloading. Its infrared sensors are primarily designed to prevent accidental material shifts during transport, not specifically for the sub-millimeter precision alignment required for stretching dies. The loading / unloading function and the high-precision alignment function are relatively separate, lacking a collaborative mechanism for active, centering calibration at the moment of placement. Therefore, its final positioning accuracy still relies on the repeatability of the robotic arm, unable to adaptively compensate for minor deviations in the die and the blank itself. This results in fluctuations in the actual placement of the blank within the die cavity, making it difficult to guarantee the extremely uniform wall thickness of the stretched cookware. Thus, loading / unloading and precise alignment remain two disconnected steps, rather than a smooth, intelligent collaborative process.

[0004] Therefore, this invention proposes a stretching device for precision forging of aluminum alloy parts. Summary of the Invention

[0005] The purpose of this invention is to provide a stretching device for precision aluminum alloy forgings to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: A stretching device for precision aluminum alloy forgings, comprising a worktable, a platform above the worktable, an annular ring outside the platform, a telescopic column inserted into the worktable at the bottom of the annular ring, a rectangular frame above the worktable, and multiple extrusion sections inside the rectangular frame. Each extrusion section includes an arc-shaped plate above the platform, a sliding rod on the side of the arc-shaped plate, and a fixed cylinder on the outer wall of the sliding rod; and each extrusion section is located outside the annular ring. Each curved plate has a curved strip at its bottom, with the bottom surface of the curved strip overlapping the top surface of the annular ring. Inside the rectangular frame, there is a centering unit that pushes multiple curved strips closer to each other. The centering unit pushes the circular blank to the center of the annular ring. The side of the centering unit has a feeding unit, which is used to transport the circular blank to the top of the platform.

[0006] Preferably, an annular pressure head is provided above the platform, a hydraulic rod is provided above the annular pressure head, a fixed frame is provided on the outer wall of the hydraulic rod, the fixed frame is fixedly connected to the worktable through a guide post, and an auxiliary frame is provided on the outer wall of the ejection area of ​​the hydraulic rod, the auxiliary frame is slidably connected to the guide post.

[0007] Preferably, the central unit includes a connecting plate located on the side of the arc-shaped strip. The connecting plate has a protrusion, and a fixing post is provided on the side of the protrusion. A spring is provided on the outside of the fixing post, and a connecting block is provided at the end of the spring. The fixing post passes through the connecting block and is slidably connected to it. The top of the connecting block is fixedly connected to the outer wall of the slide rod. Multiple extrusion parts are centrally symmetrically distributed. One fixing cylinder passes through the rectangular frame and is fixedly connected to it. The end of this fixing cylinder is provided with a connecting hole. The sides of the other two fixing cylinders are provided with C-shaped tubes. The C-shaped tubes are fixedly connected to the rectangular frame by buckles. The ends of the C-shaped tubes and the two fixing cylinders are interconnected. A connecting hole is also provided above the C-shaped tubes. An air pump is provided on the side of the rectangular frame. The fixing cylinders and C-shaped tubes located inside the rectangular frame are interconnected with the air pump through the connecting holes.

[0008] Preferably, both the C-shaped tube and the fixed cylinder are under negative pressure. By adjusting the air pressure inside the C-shaped tube and the fixed cylinder with an air pump, multiple sliding rods can be pushed to move closer and further apart simultaneously.

[0009] Preferably, the feeding unit includes a hydraulic cylinder located above the workbench. The rectangular frame has two protrusions that are inserted into the interior of the workbench and slidably connected via slide rails. The end of the hydraulic cylinder is fixedly connected to the protrusions via a connecting frame. The side of the annular ring is provided with a receiving platform for receiving circular blanks. The bottom of the receiving platform is provided with an electric push rod, the bottom end of which is fixedly connected to the workbench. Both sides of the receiving platform are provided with clamping parts. The clamping part includes an arc-shaped block. The outer wall of the arc-shaped block is provided with a connecting rod, and the outer wall of the connecting rod is provided with a connecting cylinder. The outer wall of the connecting cylinder is fixedly connected to the rectangular frame. The side of the rectangular frame is provided with a second air pump. The second air pump is connected to two connecting cylinders located inside the rectangular frame via air pipes. The interiors of the two connecting cylinders are both under negative pressure.

[0010] Preferably, a first conveyor belt and a second conveyor belt are also provided above the workbench. The first conveyor belt is used to transport round blanks and is located on the side of the receiving platform. The second conveyor belt is located on the side of the annular ring and is used to transport the stretched round pots.

[0011] Preferably, the arc-shaped block has an extrusion block inside, the bottom of the extrusion block has a spring, and the side of the extrusion block is inclined.

[0012] Preferably, the materials of the arc plate, arc strip, and arc block are all elastic, and the hydraulic rod, air pump one, air pump two, electric push rod, and hydraulic cylinder are all electrically connected to the control center.

[0013] Preferably, the interior of the arc-shaped plate is a hollow structure, and the wall of the arc-shaped plate is provided with multiple through holes. The arc-shaped plate is connected to an external air pressure pump through an air pipe. Before the annular pressure head presses down, the air pressure pump delivers high-pressure gas into the arc-shaped plate to blow off impurities on the surface of the circular blank.

[0014] Preferably, the through hole is shaped as an outwardly expanding inclined shape. The arc plate is connected to the external oil can through the tube body. The external oil can has a pump body inside. Before the annular pressure head is pressed down, the external oil can deliver lubricating oil into the arc plate. The lubricating oil is discharged from the inside of multiple arc plates to form a ring above the circular blank. The position of this ring is located in the area where the circular blank is stretched.

[0015] This invention has at least the following beneficial effects: This invention achieves precise feeding and centering of circular billets by incorporating structures such as an annular ring, telescopic pillars, an extrusion section, a centering unit, and a feeding unit. This solves the problem in existing technologies where feeding and alignment are disconnected, making it impossible to guarantee accurate placement of the billet within the mold cavity. The centering unit precisely pushes the circular billet to the center of the annular ring, ensuring accurate placement of the billet within the stretching die and reducing uneven wall thickness of the stretched cookware caused by positional deviations. The feeding unit makes the transport of the circular billet more efficient and stable, allowing for flexible clamping and releasing of the billet, facilitating the feeding operation.

[0016] The various components of the entire equipment work together to form a smooth and intelligent collaborative process, organically combining loading and unloading with precision alignment, which greatly improves the accuracy and efficiency of stretching aluminum alloy precision forgings, meets the process requirements of precision stretching of high-end aluminum alloy cookware, and has high practicality and promotion value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the working scenario structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the rectangular frame in this invention; Figure 4 This is a cross-sectional view of the structure of each component of the central unit and the feeding unit of the present invention; Figure 5 For the present invention Figure 4Enlarged view of the structure of region A in the middle; Figure 6 For the present invention Figure 4 Enlarged view of the structure of region B in the middle; Figure 7 This is a schematic diagram of the specific shape and structure of the through hole in the third embodiment of the present invention; Figure 8 This is a diagram showing the electrical connections between the control center system and various electrical devices of this invention.

[0018] In the diagram: 1-Workbench; 2-Platform; 3-Annular ring; 4-Rectangular frame; 5-Arc plate; 6-Slide rod; 7-Fixed cylinder; 8-Arc strip; 9-Annular pressure head; 10-Hydraulic rod; 11-Fixed frame; 12-Auxiliary frame; 13-Connecting plate; 14-Fixed column; 15-Spring 1; 16-Connecting block; 17-C-shaped tube; 18-Air pump 1; 19-Hydraulic cylinder; 20-Receiving platform; 21-Electric push rod; 22-Arc block; 23-Connecting rod; 24-Connecting cylinder; 25-Air pump 2; 26-Conveyor belt 1; 27-Conveyor belt 2; 28-Extrusion block; 29-Spring 2; 30-Through hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] Please see Figures 1-6 This invention provides a technical solution: a precision forging and stretching device for aluminum alloy parts, comprising: A workbench 1 is provided, with a platform 2 fixedly connected to it on top. An annular ring 3 is provided on the outside of the platform 2. Circular blanks are placed on top of the annular ring 3 during processing, and the outer edge of the blank must coincide with the outer wall of the annular ring 3. A telescopic column inserted into the workbench 1 is located at the bottom of the annular ring 3, with its top fixedly connected to the annular ring 3 and slidably connected to the workbench 1. An annular pressure head 9 is provided above the platform 2, with its bottom area corresponding to the top surface of the annular ring 3. A hydraulic rod 10 is provided above the annular pressure head 9 and fixedly connected to it. A fixing frame 11 is provided on the outer wall of the hydraulic rod 10 and fixedly connected to it. The fixing frame 11 is fixedly connected to the workbench 1 via a guide post. An auxiliary frame 12 is provided on the outer wall of the ejection area of ​​the hydraulic rod 10 and fixedly connected to it, with the auxiliary frame 12 slidably connected to the guide post.

[0021] The stretching process of aluminum alloy round billets in the prior art is roughly as follows: After the round billet is placed above the annular ring 3 and centered, the hydraulic rod 10 is activated to drive the annular pressure head 9 to squeeze the round billet downward, and push the annular ring 3 and the telescopic column to slide downward, so that the billet in the middle area gradually bulges up to form a round pot. Finally, the lifting machine inside the worktable 1 pushes the telescopic column upward, so that the stretched round pot rises and is pushed away from the platform 2.

[0022] In this design, a rectangular frame 4 is provided above the workbench 1. Multiple extrusion sections are located inside the rectangular frame 4. Each extrusion section includes an arc-shaped plate 5 above the platform 2. A sliding rod 6 is provided on the side of the arc-shaped plate 5 and fixedly connected to it. A fixed cylinder 7 is provided on the outer wall of the sliding rod 6 and slidably connected to it. Each extrusion section is located outside the annular ring 3 and is centrally symmetrically distributed. An arc-shaped strip 8 is provided at the bottom of each arc-shaped plate 5. The bottom surface of the arc-shaped strip 8 coincides with the top surface of the annular ring 3, thus allowing the arc-shaped strip 8 to push the circular billet to move above the annular ring 3. A centering unit is provided inside the rectangular frame 4 to push multiple arc-shaped strips 8 closer together, thereby centering the circular billet at the center of the annular ring 3. The centering unit is equipped with a feeding unit on its side. The feeding unit is used to transport the circular billet to the top of the platform 2. The centering unit and the feeding unit cooperate with each other to realize the automatic loading and unloading of the billet, while centering the circular billet on the ring 3. This achieves a smooth and intelligent collaborative working process, improving the stretching quality and efficiency of aluminum alloy forgings.

[0023] The central unit includes a connecting plate 13 located on the side of the arc-shaped strip 8. The end of the connecting plate 13 is fixedly connected to the arc-shaped strip 8. The connecting plate 13 has a protrusion, and a fixing post 14 is provided on the side of the protrusion and fixedly connected to it. A spring 15 is provided on the outside of the fixing post 14, and a connecting block 16 is provided at the end of the spring 15. The two ends of the spring 15 are fixedly connected to the protrusion and the connecting block 16 respectively. The fixing post 14 passes through the connecting block 16 and is slidably connected to it. The top of the connecting block 16 is fixedly connected to the outer wall of the slide rod 6. There are three fixing cylinders 7. One fixing cylinder 7 passes through the rectangular frame 4 and is fixedly connected to it. The end of this fixing cylinder 7 is provided with a connecting hole. The other two fixing cylinders 7 are provided with C-shaped tubes 17 on their sides. The C-shaped tubes 17 are fixedly connected to the rectangular frame 4 by buckles. The ends of the C-shaped tubes 17 are connected to each other, and the top of the C-shaped tubes 17 is also provided with a connecting hole. An air pump 18 is fixedly connected to the side of the rectangular frame 4. The fixed cylinder 7 and C-shaped tube 17 inside the rectangular frame 4 are connected to the air pump 18 through connection holes. The C-shaped tube 17 and the fixed cylinder 7 are both under negative pressure. By adjusting the air pressure inside the C-shaped tube 17 and the fixed cylinder 7 by the air pump 18, multiple sliding rods 6 can be pushed to move closer and further away from each other at the same time, thereby causing the connecting plate 13 and the arc-shaped strip 8 at the bottom of the sliding rods 6 to move away from or closer to each other.

[0024] As the three sliding rods 6 approach each other simultaneously, the sliding rods 6 will cause the connecting plate 13 and the arc-shaped strip 8 to approach each other, thereby driving the arc-shaped strip 8 to push the circular blank on the annular ring 3 until the circular blank is in the center position of the platform 2. When the arc-shaped strip 8 stops moving, the extrusion plate can still be pushed forward under the influence of negative pressure, which facilitates the subsequent clamping of the formed circular pot. The elastic force of the spring 15 can pull the inner wall of the arc-shaped strip 8 to slide to coincide with the inner wall of the arc-shaped plate 5 during the return of the sliding rods 6, which facilitates the secondary alignment of the blank.

[0025] The loading unit includes a hydraulic cylinder 19 located above the workbench 1. The bottom of the hydraulic cylinder 19 is fixedly connected to the workbench 1. The rectangular frame 4 has two protrusions that are inserted into the interior of the workbench 1 and slidably connected via slide rails. The end of the hydraulic cylinder 19 is fixedly connected to the protrusions via a connecting frame. The hydraulic cylinder 19 can drive the rectangular frame 4 to move laterally back and forth a fixed distance on the workbench 1, thereby achieving the required movement distance for loading and unloading. The side of the annular ring 3 is provided with a receiving platform 20 for receiving circular blanks. The bottom of the receiving platform 20 is provided with an electric push rod 21 and fixedly connected to it. The receiving platform 20 has a slot for inserting blanks. The bottom end of the electric push rod 21 is fixedly connected to the workbench 1. The electric push rod 21 is preset with an automatic lifting interval, which can drive the receiving platform 20 to achieve reciprocating up and down displacement.

[0026] Both sides of the receiving platform 20 are equipped with clamping parts, each including an arc-shaped block 22. An extrusion block 28 is located inside the arc-shaped block 22 and is slidably connected to it. A second spring 29 is located at the bottom of the extrusion block 28, with both ends of the second spring 29 fixedly connected to the extrusion block 28 and the arc-shaped block 22, respectively. The side of the extrusion block 28 is inclined. When the two arc-shaped blocks 22 approach each other, the circular billet will abut against the inclined area of ​​the extrusion block 28 and gradually embed itself into the top of the extrusion block 28. The spring force of the second spring 29 extrudes the billet, facilitating subsequent stable transfer of the billet. A connecting rod 23 is located on the outer wall of the arc-shaped block 22 and is fixedly connected to it. A connecting cylinder 24 is located on the outer wall of the connecting rod 23 and is slidably connected to it. The outer wall of the connecting cylinder 24 is fixedly connected to the rectangular frame 4. An air pump 25 is located on the side of the rectangular frame 4 and is fixedly connected to it. The air pump 25 is connected to the two connecting cylinders 24 located inside the rectangular frame 4 via an air pipe. Both connecting cylinders 24 are under negative pressure. The second air pump 25 can also drive the connecting rod 23 to extend or retract inside the connecting cylinder 24 by controlling the air pressure, thereby pushing the two arc-shaped blocks 22 to clamp or release the blank.

[0027] In addition, conveyor belt 26 and conveyor belt 27 are provided above workbench 1. In this scheme, conveyor belt 26 and conveyor belt 27 are only for illustrative purposes. In reality, they can be added or shortened according to actual needs. Conveyor belt 26 is used to transport round blanks and is located on the side of receiving platform 20. After the electric push rod 21 descends to the preset height, conveyor belt 26 can transport the round blanks to be inserted into the slot of receiving platform 20. Conveyor belt 27 is located on the side of annular ring 3 and is used to transport stretched round cookware. The cookware held by the extrusion plate can move to above conveyor belt 27 as the rectangular frame 4 moves. Finally, the pressure reduction operation of air pump 18 causes the extrusion plate to be released, so that the cookware falls above conveyor belt 27 and is transported with it.

[0028] The curved plate 5, curved strip 8, and curved block 22 are all made of elastic materials to prevent scratching the surface of the blank and cookware. The hydraulic rod 10, air pump 18, air pump 25, electric push rod 21, and hydraulic cylinder 19 are all electrically connected to the control center. Air pump 18 and air pump 25 can be HAP1500 models, electric push rod 21 can be a TiMOTION MA series model, and hydraulic cylinder 19 can be a CLRG series model. Air pump 18 and air pump 25 are independent of each other. Air pump 18 can be activated once to center the circular blank when alignment is required, and then activated a second time together with air pump 25 to clamp and displace the stretched cookware.

[0029] Working principle: At the start of the stretching process for the aluminum alloy round billet, the control center first activates the hydraulic cylinder 19. The hydraulic cylinder 19 drives the rectangular frame 4 to move towards the receiving platform 20 until it reaches the preset position. At this time, the conveyor belt 26 transports the round billet to the side of the receiving platform 20, and the electric push rod 21 descends according to the preset automatic lifting interval, aligning the slot of the receiving platform 20 with the round billet, allowing the round billet to be smoothly inserted into the slot.

[0030] Next, the control center starts air pump 25, which adjusts the air pressure inside the two connecting cylinders 24. Because the connecting cylinders 24 are under negative pressure, the pressure change causes the connecting rod 23 to extend out of the connecting cylinders 24, thereby pushing the two arc-shaped blocks 22 closer together. When the arc-shaped blocks 22 approach each other, the circular billet comes into contact with the inclined area of ​​the extrusion block 28, and the circular billet gradually embeds itself above the extrusion block 28. Spring 29 is compressed, and its elastic force squeezes the billet, ensuring that the billet is stably clamped.

[0031] Subsequently, the electric push rod 21 rises, raising the receiving platform 20 holding the circular billet to a suitable height. The control center then controls the hydraulic cylinder 19, causing the rectangular frame 4 to move the arc-shaped block 22 holding the circular billet towards the annular ring 3 until the circular billet is above the annular ring 3.

[0032] Next, the control center activates air pump 18. Air pump 18 adjusts the air pressure inside C-shaped tube 17 and fixed cylinder 7. Since C-shaped tube 17 and fixed cylinder 7 are under negative pressure, the pressure change pushes multiple sliding rods 6 closer together. The sliding rods 6 drive the connecting plate 13 and arc-shaped strip 8 closer together, and the arc-shaped strip 8 pushes the circular blank to move above the annular ring 3. As the multiple sliding rods 6 continue to move closer, the circular blank gradually centers in the center of the annular ring 3 under the push of the arc-shaped strip 8. When the circular blank is in the center position of the platform 2, the arc-shaped strip 8 stops moving, but under the action of air pressure, the extrusion plate can still continue to push forward a certain distance, preparing for the subsequent clamping and forming of the circular pot.

[0033] Subsequently, the control center activates hydraulic rod 10, which drives the annular pressure head 9 to press the circular blank downwards. As the annular pressure head 9 presses down, the annular ring 3 and the telescopic column slide downwards under pressure, and the blank in the middle area gradually bulges, beginning to form the prototype of a circular cookware. Throughout the stretching process, due to the elasticity of the materials of the arc plate 5, arc strip 8, and arc block 22, no scratches are caused to the surface of the blank and the cookware, ensuring the surface quality of the aluminum alloy precision forging.

[0034] After the stretching process is completed, the lifting machine inside workbench 1 pushes the telescopic column upward, causing the stretched circular pot to rise. At this time, the control center again controls air pump 18 and air pump 25 to start together. Air pump 18 further adjusts the air pressure to make the extrusion plate clamp the formed circular pot more firmly; air pump 25 also controls the air pressure to assist the arc block 22 in effectively clamping the next circular blank lifted by the receiving platform 20.

[0035] Then, hydraulic cylinder 19 is activated, driving the rectangular frame 4 to move towards conveyor belt 27 until the clamped round pot is above conveyor belt 27. Finally, the control center controls air pump 18 to reduce pressure, the extrusion plate releases its grip on the pot, and the pot falls above conveyor belt 27. Conveyor belt 27 then transports the stretched round pot to the next process.

[0036] The entire aluminum alloy precision forging drawing equipment achieves a series of operations through the coordinated work of its components, including automatic feeding, centering alignment, drawing, and automatic unloading of round billets. This forms a smooth and intelligent collaborative process, effectively improving the drawing quality and efficiency of aluminum alloy forgings. Simultaneously, the equipment solves the problem of disconnect between loading / unloading and precision alignment in existing technologies. Through the cooperation of the centering unit and the feeding unit, it can adaptively compensate for minor deviations in the die and the billet itself, ensuring the precise placement of the billet within the die cavity. This improves the uniformity of the wall thickness of the drawn cookware and better meets the process requirements of precision drawing of high-end aluminum alloy cookware.

[0037] Based on the above embodiments, Embodiment Two The interior of the arc plate 5 is a hollow structure. The wall of the arc plate 5 is provided with multiple through holes 30. The arc plate 5 is connected to an external air pressure pump through an air pipe. Before the annular pressure head 9 presses down, the air pressure pump delivers high-pressure gas into the arc plate 5 to blow off impurities on the surface of the circular blank.

[0038] Working principle: After the aluminum alloy circular billet is transported above the annular ring 3 and centered, the control center activates the external pneumatic pump. Because the arc-shaped plate 5 has a hollow internal structure and multiple through-holes 30 in its walls, high-pressure gas supplied by the pneumatic pump enters the arc-shaped plate 5 through air pipes and is ejected at high speed from the through-holes 30. This high-pressure gas forms a powerful airflow that directly acts on the surface of the circular billet. During processing and transportation, the surface of the circular billet may accumulate dust, debris, and other impurities. The impact of the high-pressure airflow causes these impurities to detach from the billet surface and be blown away. This prevents these impurities from adversely affecting the quality of the aluminum alloy forging during subsequent stretching.

[0039] Example 3: This example can be used to replace Example 2. Please see Figure 7 The through hole 30 is shaped as an outwardly expanding inclined shape. The arc plate 5 is connected to the external oil can through the tube body. The external oil can has a pump body inside. Before the annular pressure head 9 presses down, the external oil can deliver lubricating oil into the arc plate 5. The lubricating oil discharged from the multiple arc plates 5 forms a ring above the circular blank. The position of this ring is located in the area where the circular blank is stretched.

[0040] Working principle: Once the circular aluminum alloy blank is placed on the annular ring 3 and centered, the control center activates the external oil reservoir. The pump inside the reservoir begins operation, delivering lubricating oil through a pipe to the interior of the curved plate 5. Because the through-holes 30 are shaped with an outward-expanding, inclined shape, the lubricating oil discharged from the through-holes 30 inside the curved plate 5 is sprayed onto the surface of the circular blank at a specific angle and range. As the lubricating oil continuously discharges from the through-holes 30 of multiple curved plates 5, a ring gradually forms above the circular blank. This ring is positioned precisely in the area where the circular blank undergoes stretching.

[0041] When the annular pressure head 9 presses down to perform the stretching operation, the ring formed by this lubricating oil plays a crucial role. On the one hand, the lubricating oil can reduce the friction between the annular pressure head 9 and the circular blank, allowing the annular pressure head 9 to squeeze the blank more smoothly and reducing the damage to the blank surface caused by friction.

[0042] On the other hand, the lubricating oil facilitates the flow and deformation of the billet during the stretching process. During stretching, the central area of ​​the circular billet gradually bulges to form a circular cookware, and different parts of the billet require varying degrees of deformation and flow. The lubricating oil acting on this area can provide lubrication compensation to the areas most prone to deformation, allowing the billet to flow more evenly during deformation and avoiding localized stress concentration, thereby improving the uniformity of the cookware wall thickness after stretching. This is of great significance for meeting the process requirements of precision stretching of high-end aluminum alloy cookware, and can effectively improve the overall quality and performance of aluminum alloy precision forgings.

[0043] It is worth noting that this equipment requires regular maintenance and upkeep of its components during long-term use. For power components such as air pump 18, air pump 25, electric actuator 21, hydraulic cylinder 19, and the pump bodies of the external air pump and external oil reservoir, their operating status and sealing should be checked. Worn seals should be replaced promptly to prevent gas or liquid leaks that could affect the normal operation of the equipment and the stability of air and oil pressure. Impurities inside the air pumps and oil reservoirs should be cleaned regularly to prevent blockages in the pipes or disruption of the pump's normal operation.

[0044] For sliding components such as slide bar 6, fixed cylinder 7, connecting cylinder 24, and connecting rod 23, check their surface wear and add lubricating oil regularly to ensure smooth sliding. If severe wear is found, replace the components promptly to prevent decreased equipment precision due to component wear, which could affect the tensile quality of aluminum alloy forgings. For components that directly contact the blanks and cookware, such as arc plate 5, arc strip 8, and arc block 22, check their elasticity and for any damage or deformation, as their materials are elastic. If any problems are found, replace them promptly to prevent scratching the blanks and cookware surfaces and affecting product quality. After long-term use, check the tension and wear of conveyor belts 26 and 27, adjust the tension promptly, and replace severely worn belts to ensure stable transport of blanks and cookware.

[0045] At the same time, it is necessary to regularly check whether the connections between the various components of the equipment are secure, such as whether the bolts are loose and whether the clips are tight. For any loose connections, tighten them in time to prevent equipment failure or affect working accuracy due to loose parts during equipment operation.

[0046] In addition, the control center should be regularly inspected and maintained, checking the circuit connections for proper functioning and the stability of the software system. Control programs should be updated promptly to ensure the control center can accurately control the coordinated operation of all components, achieving smooth and intelligent equipment operation. Through these comprehensive maintenance and upkeep measures, the service life of the equipment can be extended, ensuring it remains in good operating condition and continuously and efficiently producing high-quality aluminum alloy precision forgings.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision forging stretching device for aluminum alloy parts, comprising a worktable (1), a platform (2) above the worktable (1), an annular ring (3) outside the platform (2), and a telescopic column inserted into the worktable (1) at the bottom of the annular ring (3), characterized in that: A rectangular frame (4) is provided above the workbench (1). Multiple extrusion sections are provided inside the rectangular frame (4). The extrusion section includes an arc plate (5) above the platform (2). A slide rod (6) is provided on the side of the arc plate (5). A fixed cylinder (7) is provided on the outer wall of the slide rod (6). Each extrusion section is located outside the annular ring (3). Each arc plate (5) has an arc strip (8) at its bottom. The bottom surface of the arc strip (8) coincides with the top surface of the ring (3). The rectangular frame (4) has a centering unit inside that pushes multiple arc strips (8) to move closer to each other at the same time. The centering unit pushes the circular blank to be centered in the center of the ring (3). A feeding unit is provided on the side of the central unit. The feeding unit is used to transport the circular blank to the top of the platform (2).

2. The aluminum alloy precision forging stretching equipment according to claim 1, characterized in that: An annular pressure head (9) is provided above the platform (2), and a hydraulic rod (10) is provided above the annular pressure head (9). A fixed frame (11) is provided on the outer wall of the hydraulic rod (10). The fixed frame (11) is fixedly connected to the worktable (1) through the guide column. An auxiliary frame (12) is provided on the outer wall of the ejection area of ​​the hydraulic rod (10). The auxiliary frame (12) is slidably connected to the guide column.

3. The aluminum alloy precision forging stretching equipment according to claim 2, characterized in that: The central unit includes a connecting plate (13) located on the side of the arc-shaped strip (8). The connecting plate (13) has a protrusion, and a fixing post (14) is provided on the side of the protrusion. A spring (15) is provided on the outside of the fixing post (14), and a connecting block (16) is provided at the end of the spring (15). The fixing post (14) passes through the connecting block (16) and is slidably connected to it. The top of the connecting block (16) is fixedly connected to the outer wall of the slide rod (6). Multiple extrusion parts are centrally symmetrically distributed, and one of the fixing cylinders (7) passes through the rectangular frame (4) and The fixed cylinder (7) is fixedly connected to the other two fixed cylinders (7). The ends of the fixed cylinders (7) are provided with connecting holes. The sides of the other two fixed cylinders (7) are provided with C-shaped tubes (17). The C-shaped tubes (17) are fixedly connected to the rectangular frame (4) by buckles. The ends of the C-shaped tubes (17) and the two fixed cylinders (7) are connected to each other. The top of the C-shaped tubes (17) is also provided with connecting holes. The side of the rectangular frame (4) is provided with an air pump (18). The fixed cylinders (7) and C-shaped tubes (17) inside the rectangular frame (4) are connected to the air pump (18) through connecting holes.

4. The aluminum alloy precision forging stretching equipment according to claim 3, characterized in that: Both the C-shaped tube (17) and the fixed cylinder (7) are under negative pressure. By adjusting the air pressure inside the C-shaped tube (17) and the fixed cylinder (7) with the air pump (18), multiple sliding rods (6) can be pushed to move closer and further away from each other at the same time.

5. The aluminum alloy precision forging stretching equipment according to claim 4, characterized in that: The feeding unit includes a hydraulic cylinder (19) located above the workbench (1). The rectangular frame (4) has two protrusions that are inserted into the workbench (1) and slidably connected by a slide rail. The end of the hydraulic cylinder (19) is fixedly connected to the protrusions via a connecting frame. The side of the annular ring (3) is provided with a receiving platform (20) for receiving circular blanks. The bottom of the receiving platform (20) is provided with an electric push rod (21). The bottom end of the electric push rod (21) is fixedly connected to the workbench (1). (20) has clamping parts on both sides; the clamping parts include arc-shaped blocks (22), the outer wall of the arc-shaped blocks (22) is provided with connecting rods (23), the outer wall of the connecting rods (23) is provided with connecting cylinders (24), the outer wall of the connecting cylinders (24) is fixedly connected to the rectangular frame (4), the side of the rectangular frame (4) is provided with air pump two (25), the air pump two (25) is connected to the two connecting cylinders (24) located inside the rectangular frame (4) through air pipes, and the interior of the two connecting cylinders (24) is in a negative pressure state.

6. The aluminum alloy precision forging stretching equipment according to claim 5, characterized in that: Above the workbench (1) are also conveyor belt one (26) and conveyor belt two (27). Conveyor belt one (26) is used to transport round blanks and is located on the side of the receiving platform (20). Conveyor belt two (27) is located on the side of the ring (3) and is used to transport the stretched round pot.

7. The aluminum alloy precision forging stretching equipment according to claim 6, characterized in that: The inside of the arc-shaped block (22) is provided with a compression block (28), and the bottom of the compression block (28) is provided with a spring (29). The side of the compression block (28) is slanted.

8. The aluminum alloy precision forging stretching equipment according to claim 7, characterized in that: The materials of the arc plate (5), arc strip (8) and arc block (22) are all elastic. The hydraulic rod (10), air pump one (18), air pump two (25), electric push rod (21) and hydraulic cylinder (19) are all electrically connected to the control center.

9. The aluminum alloy precision forging stretching equipment according to claim 1, characterized in that: The interior of the arc plate (5) is a cavity structure. The wall of the arc plate (5) is provided with multiple through holes (30). The arc plate (5) is connected to an external air pressure pump through an air pipe. Before the annular pressure head (9) presses down, the air pressure pump delivers high-pressure gas into the arc plate (5) to blow off impurities on the surface of the circular blank.

10. The aluminum alloy precision forging stretching equipment according to claim 9, characterized in that: The through hole (30) is shaped to expand outwards and is inclined. The arc plate (5) is connected to the external oil can through the tube. The external oil can has a pump body inside. Before the annular pressure head (9) presses down, the external oil can deliver lubricating oil into the arc plate (5). The lubricating oil is discharged from the inside of multiple arc plates (5) to form a ring above the circular blank. The position of this ring is located in the area where the circular blank is stretched.

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