Thin-wall die casting deformation regulation and control device and method based on local hot-pressing shaping

Abstract

The thin-wall die casting deformation regulation and control device comprises a machine tool rack, a turnover mechanism and a lifting mechanism, the machine tool rack comprises an upper die and a lower die, an operation cavity is formed between the upper die and the lower die, an assembly cavity is formed in the lower end of the lower die, one end of the turnover mechanism is fixedly connected to the side wall of the machine tool rack, and the other end of the turnover mechanism is fixedly connected to the side wall of the machine tool rack. The lifting mechanism is arranged in the assembly cavity, a moving table is arranged at the upper end of the turnover mechanism and clamps the casting, the turnover mechanism drives the moving table to convey the casting to the operation cavity, and feeding is completed through the lifting mechanism; after hot-press shaping, the lifting mechanism ejects a casting out of the lower die, the turnover mechanism drives the moving table to move the casting out of the operation cavity, feeding and discharging transportation is conducted on the casting through the turnover mechanism and the moving table arranged at the upper end of the turnover mechanism, the lifting mechanism can lift and descend the casting, and the casting can be conveniently subjected to die feeding and die discharging; and meanwhile, the working efficiency can be improved, and time and labor are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of hot pressing and shaping, and in particular to a device and method for controlling the deformation of thin-walled die-castings based on local hot pressing and shaping. Background Art

[0002] Currently, in the commonly used die hot shaping, the die is usually directly pressed to adjust the shape of the part to the preset target, and the deformation stress is released by heating to stabilize the shape of the part to be shaped, which can also be called the overall die hot shaping. Then, the shaped structural part is subjected to a half-hour shaping scan. After a series of operations, the shaping of the thin-walled structural part is finally completed. In this process, the deformation scan of the thin-walled structural part takes too much time. At the same time, during the hot shaping process, the structural part is subjected to uniform hot pressing treatment, and there is a situation where the originally undeformed part is deformed instead, and the heat treatment of the deformation lacks pertinence. Due to the large size and heavy weight of the large integrated die-cast thin-walled structural part, it is difficult for the operator to carry the casting on and off the machine tool. Therefore, a device for controlling the deformation of large thin-walled die-castings based on local hot pressing and shaping is designed to reduce the working intensity. Summary of the Invention

[0003] Aiming at the deficiencies and defects of the prior art, a device and method for controlling the deformation of thin-walled die-castings based on local hot pressing and shaping are provided. To achieve the purpose of improving efficiency and facilitating loading and unloading, the present invention provides the following technical solutions.

[0004] The present invention discloses a device for controlling the deformation of thin-walled die-castings based on local hot pressing and shaping, which includes a machine tool frame, a flipping mechanism, and a lifting mechanism for hot pressing and shaping the casting. The machine tool frame includes an upper die and a lower die. An operation cavity is formed between the upper die and the lower die. An assembly cavity is provided at the lower end of the lower die. One end of the flipping mechanism is fixedly connected to the side wall of the machine tool frame. The lifting mechanism is arranged in the assembly cavity. A moving table is provided at the upper end of the flipping mechanism. The moving table holds the casting. The flipping mechanism drives the moving table to transport the casting to the operation cavity, and the lifting mechanism completes the loading. After hot pressing and shaping, the lifting mechanism ejects the casting out of the lower die, and the flipping mechanism drives the moving table to move the casting out of the operation cavity.

[0005] Compared with the prior art, in the present invention, the casting is transported for loading and unloading through the flipping mechanism and the moving table provided at the upper end of the flipping mechanism. The lifting mechanism can lift and lower the casting, which is convenient for the casting to be placed on the upper die and the lower die, facilitating the operation of the operator, and at the same time improving the working efficiency, saving time and effort.

[0006] Further, the flipping mechanism includes an upper end plate, a lower end plate, a first connecting rod, a second connecting rod, and a third connecting rod. One side of the lower end plate is provided with a fixed plate, and the fixed plate is fixedly connected to the machine tool frame; the first connecting rod, the second connecting rod, and the third connecting rod are connected to the lower end plate through a central axis by a revolute pair. A transmission shaft is designed between the first connecting rod and the second connecting rod. The first connecting rod, the second connecting rod, and the third connecting rod are connected to the upper end plate through a central axis by a revolute pair. A guiding cylinder is arranged between the third connecting rod and the lower end plate. The upper end of the guiding cylinder is connected to the middle section of the third connecting rod through a central axis by a revolute pair, and the lower end of the guiding cylinder is connected to the lower end plate through a central axis by a revolute pair.

[0007] Through the above improvements, the upper end plate and the lower end plate of the flipping mechanism are connected by the first connecting rod, the second connecting rod, and the third connecting rod. A transmission shaft is arranged between the first connecting rod and the second connecting rod. Through the transmission shaft, it can be ensured that the first connecting rod and the second connecting rod move synchronously; and the upper ends of the first connecting rod, the second connecting rod, and the third connecting rod are all connected to the upper end plate by a revolute pair, and the third connecting rod is also connected to the lower end plate by a revolute pair. By adjusting the rotation of the first connecting rod, the second connecting rod, and the third connecting rod, the upper end plate can be driven to move, so as to always keep the upper end plate in a horizontal state; and the guiding cylinder arranged between the third connecting rod and the lower end plate can adjust the rotation direction to prevent deviation.

[0008] Further, a first motor is arranged on the lower end plate. A first gear is arranged on the output shaft of the first motor. A second gear is fixedly connected to the transmission shaft. The first gear meshes with the second gear.

[0009] Through the above improvements, the first motor on the lower end plate, the first gear on the output shaft of the first motor meshes with the second gear on the transmission shaft. When the first gear rotates, it drives the transmission shaft to rotate, thereby driving the entire flipping mechanism to rotate. The structure is simple and convenient, and it is relatively easy to control.

[0010] Further, a first support plate is fixedly connected to the upper end surface of the upper end plate. A second motor is arranged on the upper end of the first support plate. A worm is arranged on the output shaft of the second motor. A connecting block is also arranged on the upper end plate. A connecting shaft is arranged in the middle of the connecting block. One end of the connecting shaft is provided with a turbine, and the other end is provided with a third gear. The turbine meshes with the worm. A rack is arranged on the first support plate. The third gear is arranged at one end of the rack. The other end of the rack is provided with a fourth gear and a flipping block. The fourth gear is fixedly connected to the flipping block through a central axis and is connected to the first support plate by a revolute pair.

[0011] Through the above improvements, the rack provided on the first support plate is connected to the third gear and the fourth gear. The movement of the rack drives the fourth gear and the turning table to rotate. The structure and operation are simple and effective. Moreover, the turning block is controlled by the second motor, and the control effect is good.

[0012] Further, the moving table is C-shaped. The moving table includes a fixed section and a connecting section. One end of the fixed section close to the connecting section is fixedly connected to the turning block. An extension block is provided on the fixed section. The extension block is connected to the fixed section through a spring hinge. The extension block clamps the casting.

[0013] Through the above improvements, the moving table is C-shaped, which can better fit the shape of the lower mold and has space to clamp the casting. An extension block is provided on the fixed section, which can facilitate the clamping of the casting. Moreover, the extension block is connected to the fixed section through a spring hinge, which can avoid the collision between the extension block and the upper mold during mold closing and extend the service life.

[0014] Further, the lifting mechanism includes a second support plate and a support table. A slide rail is provided on the second support plate. A sliding block is provided on the slide rail. The sliding block is connected to the slide rail in a sliding pair. A third motor is provided on the second support plate. The coupling on the output shaft of the third motor is connected to the sliding block through a lead screw. A first support rod is provided on one side of the sliding block. One end of the first support rod is rotatably connected to the sliding block, and the other end is rotatably connected to the support table. A second support rod is provided on the second support plate. One end of the second support rod is rotatably connected to the second support plate, and the other end is rotatably connected to the support table. The middle parts of the first support rod and the second support rod are hinged and cooperatively arranged.

[0015] Through the above improvements, the second support plate and the support table on the lifting mechanism are connected through the first support rod and the second support rod. The upper ends of the first support rod and the second support rod are rotatably connected to the support table. The lower end of the first support rod is rotatably connected to the sliding block. The lower end of the second support rod is rotatably connected to the second support plate. Moreover, the middle sections of the first support rod and the second support rod are hinged. The distance between the support table and the second support plate can be increased or decreased by the mutual rotation between the first support rod and the second support rod, so as to realize lifting and lowering, which is convenient for operation. Moreover, the mechanism is controlled by the third motor, which is simple and effective.

[0016] Further, a thimble bracket is fixedly provided on the upper end surface of the support table. A thimble is provided on the upper end of the thimble bracket. The thimble passes through the lower mold, and the upper end of the thimble is cooperatively arranged with the casting.

[0017] Through the above improvements, a thimble bracket is provided at the upper end of the support table of the lifting mechanism. The thimble at the upper end of the thimble bracket passes through the lower die on the machine tool frame, and the upper end of the thimble is arranged in cooperation with the casting. When loading, the thimble bracket descends with the lifting mechanism, driving the casting to gradually descend so as to be arranged on the lower die. When unloading, the thimble bracket ejects the casting from the lower die, facilitating the subsequent unloading operation and improving the efficiency during loading and unloading.

[0018] The present invention discloses a method for regulating the deformation of large thin-walled die castings based on local hot pressing and shaping, which specifically includes the following steps: Step 1, Measuring data: Place the casting on the measuring device, and the measuring device determines whether the product needs to go through the hot pressing and shaping process by analyzing the edge deformation data.

[0019] Step 2, Setting data: The moving table of the hot pressing and shaping device clamps the casting to be hot pressed and shaped, and the device calculates the heat preservation temperature and time of each unit by obtaining the corresponding deformation data measured in Step 2.

[0020] Step 3, Loading: Set the casting on the hot pressing and shaping machine tool through the flipping mechanism. The lifting mechanism descends, driving the thimble bracket and the casting to move downward, and the casting is arranged in the lower die.

[0021] Step 4, Hot pressing and shaping: The upper die moves downward to close with the lower die, the die is heated to the preset temperature and heat preservation is carried out. After the hot pressing and shaping is completed, the upper die moves upward to separate from the lower die.

[0022] Step 5, Unloading: The lifting mechanism rises, the support table drives the thimble bracket and the casting to move upward, and the casting is ejected from the lower die.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: Before the casting undergoes hot pressing and shaping, loading and unloading operations need to be carried out. In the present invention, during loading and unloading, the flipping mechanism and the lifting mechanism can facilitate the loading and unloading operations of the casting, reduce the working difficulty of the operator, and improve the working efficiency.

[0024] Further, in Step 3, the specific steps of loading are as follows: Step 31: The first motor drives the first gear, driving the first connecting rod and the second connecting rod to rotate towards the direction close to the machine tool frame, causing the upper end plate and the mechanism fixedly installed on the upper end plate to rotate, and the casting gradually approaches the operation cavity of the machine tool frame.

[0025] Step 32: The second motor rotates, driving the turbine and the third gear to rotate. The third gear drives the fourth gear and the flipping block to tilt through the rack. The moving table is fixedly connected to the flipping block, causing the moving table to rotate; the moving table continues to rotate, and the tilting angle gradually decreases. When the casting contacts the thimble at the upper end of the thimble bracket, the casting separates from the moving table.

[0026] Step 33: The extension block on the moving platform rotates 80 degrees away from the casting around the spring hinge to clamp the casting.

[0027] Step 34: The third motor drives the screw rod to rotate, driving the sliding block to move towards the flipping mechanism, causing the support platform to drive the thimble bracket and the casting to move downward, and placing the casting on the lower mold.

[0028] Further, in step 5, the specific steps of blanking are as follows: Step 51: The third motor drives the screw rod to rotate, driving the second slider to move away from the flipping mechanism, causing the support platform to drive the thimble bracket and the casting to move upward, and ejecting the casting from the lower mold.

[0029] Step 52: The extension block on the moving platform rotates 80 degrees towards the casting around the spring hinge to clamp the casting.

[0030] Step 53: The second motor rotates, driving the turbine and the third gear to rotate. The third gear drives the fourth gear and the flipping block to tilt through the rack. The moving platform is fixedly connected to the flipping block, causing the moving platform to rotate; the moving platform continues to rotate, and the tilting angle gradually increases, and the casting gradually disengages from the thimble bracket.

[0031] Step 54: The first motor drives the first gear, driving the first connecting rod and the second connecting rod to rotate away from the machine tool frame, causing the upper end plate and the mechanism fixedly installed on the upper end plate to rotate, and the casting gradually moves away from the machine tool frame.

[0032] Through the above improvements, when loading and unloading the casting, the operations of loading and unloading are further refined. Through the above operations, it is convenient to load and unload the casting, reducing the workload of the operator and also reducing the risks during loading and unloading. Brief Description of the Drawings

[0033] Figure 1 It is a schematic diagram of the overall structure of the hot pressing and shaping device; Figure 2 It is a schematic diagram of the flipping mechanism and the moving platform of the device; Figure 3 It is a schematic diagram of the flipping mechanism of the device; Figure 4 It is a partial enlarged structure diagram of part A of the device; Figure 5 It is a partial enlarged structure diagram of part B of the device; Figure 6 It is a schematic diagram of the lifting mechanism of the device; Figure 7 It is a schematic diagram of the measurement and hot pressing and shaping device of the device.

[0034] Among them, 1. Machine tool frame; 1.1. Upper die; 1.2. Lower die; 1.3. Operation cavity; 1.4. Assembly cavity; 2. Flipping mechanism; 2.1. Upper end plate; 2.2. Lower end plate; 2.3. First connecting rod; 2.4. Second connecting rod; 2.5. Third connecting rod; 2.6. Fixed plate; 2.7. Transmission shaft; 2.8. Guide cylinder; 2.9. First motor; 2.10. First gear; 2.11. Second gear; 2.12. First support plate; 2.13. Second motor; 2.14. Worm; 2.15. Connecting block; 2.16. Connecting shaft; 2.17. Turbine; 2.18. Third gear; 2.19. Rack; 2.20. Fourth gear; 2.21. Flipping block; 3. Lifting mechanism; 3.1. Second support plate; 3.2. Support table; 3.3. Slide rail; 3.4. Sliding block; 3.5. Third motor; 3.6. Lead screw; 3.7. First support rod; 3.8. Second support rod; 4. Moving table; 4.1. Fixed section; 4.2. Connecting section; 4.3. Extension block; 5. Thimble bracket; 5.1. Thimble; 6. Measuring device; 7. Host computer. Detailed implementation manners

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] As Figures 1 to 7 shown, a deformation control device for large thin-walled die castings based on local hot pressing and shaping is disclosed, which includes a casting, a machine tool frame 1, a flipping mechanism 2 and a lifting mechanism 3. The machine tool frame 1 includes an upper die 1.1 and a lower die 1.2. An operation cavity 1.3 is formed between the upper die 1.1 and the lower die 1.2. An assembly cavity 1.4 is provided at the lower end of the lower die 1.2. One end of the flipping mechanism 2 is fixedly connected to the side wall of the machine tool frame 1. One end of the moving table 4 mechanism is fixedly connected to the flipping mechanism 2. The lifting mechanism 3 is arranged in the assembly cavity 1.4. A moving table 4 is arranged at the upper end of the flipping mechanism 2. The moving table 4 holds the casting. The flipping mechanism 2 drives the moving table 4 to transport the casting onto the lower die 1.2; after hot pressing and shaping, the flipping mechanism 2 drives the moving table 4 to unload the casting from the lower die 1.2.

[0038] As Figures 3 to 5As shown, the flipping mechanism 2 includes an upper end plate 2.1 and a lower end plate 2.2. On one side of the lower end plate 2.2, there is a fixing plate 2.6 which is used for fixedly connecting with the machine tool frame 1 so as to fix the entire flipping mechanism 2 on the machine tool frame 1 and prevent the flipping mechanism 2 from being unstably connected during use.

[0039] Between the upper end plate 2.1 and the lower end plate 2.2 of the flipping mechanism 2, there are a first connecting rod 2.3, a second connecting rod 2.4 and a third connecting rod 2.5. The upper ends of the first connecting rod 2.3, the second connecting rod 2.4 and the third connecting rod 2.5 are rotationally connected to the upper end plate 2.1 through a central shaft.

[0040] A transmission shaft 2.7 is arranged between the first connecting rod 2.3 and the second connecting rod 2.4. The lower ends of the first connecting rod 2.3 and the second connecting rod 2.4 are rotationally connected to the lower end plate 2.2 through the transmission shaft 2.7. The arranged transmission shaft 2.7 can ensure that the first connecting rod 2.3 and the second connecting rod 2.4 rotate synchronously when rotating. The lower end of the third connecting rod 2.5 is rotationally connected to the lower end plate 2.2 through a central shaft, and a guiding air cylinder 2.8 is arranged between the third connecting rod 2.5 and the lower end plate 2.2. The upper end of the guiding air cylinder 2.8 is rotationally connected to the middle section of the third connecting rod 2.5, and the lower end is rotationally connected to the lower end plate 2.2. The guiding air cylinder 2.8 can control the movement direction of the third connecting rod 2.5 so that the third connecting rod 2.5 will not deviate when rotating.

[0041] A first motor 2.9 is arranged on the lower end plate 2.2. A first gear 2.10 is arranged on the output shaft of the first motor 2.9. A second gear 2.11 and a first gear 2.10 are engaged on the transmission shaft 2.7. The rotation of the first gear 2.10 will drive the first gear 2.10 to rotate, drive the second gear 2.11 and the transmission shaft 2.7 to rotate, so as to make the first connecting rod 2.3 and the second connecting rod 2.4 rotate synchronously.

[0042] As Figure 2 and Figure 6As shown, a first support plate 2.12 is provided at the upper end of the upper end plate 2.1. A second motor 2.13 is fixedly connected between the first support plate 2.12 and the upper end plate 2.1. A connecting block 2.15 is further provided on the first support plate 2.12. A connecting shaft 2.16 is provided inside the connecting block 2.15. A turbine 2.17 is provided at one end of the connecting shaft 2.16, and a third gear 2.18 is provided at the other end. The turbine 2.17 meshes with a worm 2.14 on the output shaft of the second motor 2.13. When the second motor 2.13 rotates, it drives the turbine 2.17 to rotate, thereby driving the third gear 2.18 to rotate through the connecting shaft 2.16. A rack 2.19 is further provided on the first support plate 2.12. The rack 2.19 is arranged directly below the third gear 2.18 and meshes with the third gear 2.18. A fourth gear 2.20 meshes with the other side of the rack 2.19. A turning block 2.21 is fixedly connected to the outside of the fourth gear 2.20. The turning block 2.21 and the fourth gear 2.20 are rotationally connected to the first support plate 2.12 through a central shaft. When the third gear 2.18 rotates, the rack 2.19 moves linearly on the first support plate 2.12, thereby driving the fourth gear 2.20 and the turning table to rotate.

[0043] A moving table 4 is provided at the upper end of the turning table. The moving table 4 is C-shaped and includes two symmetrically arranged fixed segments 4.1 and a connecting segment 4.2. The fixed segments 4.1 and the connecting segment 4.2 are integrally arranged. The side of the fixed segment 4.1 close to the connecting segment 4.2 is fixedly connected to the upper end of the turning block 2.21. When the turning block 2.21 rotates, it drives the moving table 4 to rotate.

[0044] An extension block 4.3 is further provided on the fixed segment 4.1 of the moving table 4. The extension block 4.3 is connected to the fixed segment 4.1 through a spring hinge on the fixed segment 4.1. The extension block 4.3 is used for clamping the casting.

[0045] As Figure 6 shown, a lifting mechanism 3 is provided inside the machine tool frame 1. The lifting mechanism 3 includes a second support plate 3.1 and a support table 3.2. A thimble support 5 is fixedly connected to the upper end of the support table 3.2. A thimble 5.1 on the thimble support 5 passes through the machine tool frame 1 and the lower die 1.2 and is arranged in cooperation with the casting, facilitating the upper and lower die 1.2 operations on the casting.

[0046] The second support plate 3.1 of the lifting mechanism 3 and the support platform 3.2 are connected by the first support rod 3.7 and the second support rod 3.8 arranged crosswise. A slide rail 3.3 is provided on the second support plate 3.1, and a sliding block 3.4 is slidably connected to the slide rail 3.3. The lower end of the first support rod 3.7 is rotationally connected to the side wall of the sliding block 3.4, and the upper end is rotationally connected to the support platform 3.2; the lower end of the second support rod 3.8 is rotationally connected to the second support plate 3.1, and the upper end is rotationally connected to the support platform 3.2, and the middle sections of the first support rod 3.7 and the second support rod 3.8 are hinged.

[0047] A third motor 3.5 is also provided on the second support plate 3.1. A coupling is provided on the output shaft of the third motor 3.5. The third motor 3.5 and the sliding block 3.4 are connected by a lead screw 3.6. When the third motor 3.5 rotates, it drives the lead screw 3.6 to expand and contract, thereby driving the sliding block 3.4 to slide on the slide rail 3.3, so that the first support rod 3.7 rotates, the support platform 3.2 moves up and down, and the lifting mechanism 3 realizes rising or falling.

[0048] At the same time, the present invention also discloses a method for regulating the deformation of large thin-walled die castings based on local hot pressing and shaping, which specifically includes the following steps: Step 1, measuring data: Place the casting on the measuring device 6, and the measuring device 6 judges whether the product needs to go through the hot pressing and shaping process by analyzing the edge deformation data.

[0049] Before hot pressing and shaping, the casting is measured by the measuring device 6.

[0050] Step 2, setting data: The moving table 4 of the hot pressing and shaping device clamps the casting to be hot pressed and shaped, and the device obtains the corresponding deformation data after being measured in Step 1 and calculates the holding temperature and time of each unit.

[0051] The required data of the hot pressing and shaping device is obtained through the measuring device 6 in Step 1, and the data is transmitted to the hot pressing and shaping device through the upper computer 7.

[0052] Step 3, loading: The casting is placed on the hot pressing and shaping machine tool through the flipping mechanism 2. The lifting mechanism 3 descends, driving the thimble bracket 5 and the casting to move downward, and the casting is placed in the lower die 1.2.

[0053] In Step 3, the specific steps of loading are as follows: Step 31: The first motor 2.9 drives the first gear 2.10, driving the first connecting rod 2.3 and the second connecting rod 2.4 to rotate towards the machine tool frame 1, so that the upper end plate 2.1 and the mechanism fixedly installed on the upper end plate 2.1 rotate, and the casting gradually approaches the operation cavity 1.3 of the machine tool frame 1.

[0054] Step 32: The second motor 2.13 rotates, driving the turbine 2.17 and the third gear 2.18 to rotate. The third gear 2.18 drives the fourth gear 2.20 and the flipping block 2.21 to tilt through the rack 2.19. The moving platform 4 is fixedly connected to the flipping block 2.21, causing the moving platform 4 to rotate. The moving platform 4 continues to rotate, and the tilting angle gradually decreases. When the casting contacts the ejector pin 5.1 at the upper end of the ejector pin bracket 5, the casting separates from the moving platform 4.

[0055] Step 33: The extension block 4.3 on the moving platform 4 rotates 80 degrees away from the casting around the spring hinge.

[0056] Step 34: The third motor 3.5 drives the lead screw 3.6 to rotate, driving the sliding block 3.4 to move towards the flipping mechanism 2, causing the support platform 3.2 to drive the ejector pin bracket 5 and the casting to move downward, and placing the casting on the lower die 1.2.

[0057] During operation, the first motor 2.9 rotates forward. Through the first gear 2.10 on the output shaft and the second gear 2.11 on the transmission shaft 2.7, it drives the first connecting rod 2.3 and the second connecting rod 2.4 to rotate towards the machine tool frame 1. When it rotates to the operation cavity 1.3 between the upper die 1.1 and the lower die 1.2, the first motor 2.9 stops rotating forward.

[0058] The second motor 2.13 on the first support plate 2.12 fixedly connected to the upper end of the upper end plate 2.1 rotates forward, driving the worm 2.14 on its output shaft to rotate, thereby causing the turbine 2.17 and the third gear 2.18 to rotate. The rack 2.19 engaged with the lower end of the third rack 2.19 moves linearly on the first support plate 2.12, thereby causing the fourth gear 2.20 on the other side of the rack 2.19 to rotate, driving the flipping block 2.21 to rotate, and thus causing the moving platform 4 at the upper end of the flipping block 2.21 to rotate.

[0059] The moving platform 4 is made of stainless steel, and the casting is made of aluminum alloy. The friction coefficient μ between the two is obtained by querying the technical manual s = 0.45; Let the tilting angle of the moving platform 4 be set as θ; the mass of the object is m; the acceleration due to gravity is g; When the casting is in balance, the frictional force F f is equal to the component of the gravity parallel to the inclined plane F g .

[0060] ; ; ; ; Solving the equation gives the maximum inclination angle θ: ; Calculate the maximum inclination angle: ; In summary, the maximum value of the inclination angle is 24.23 degrees. Considering the safe operation of the equipment, the inclination angle θ is taken as 18 degrees.

[0061] During the rotation of the mobile station 4, its inclination angle θ gradually decreases. When it rotates to the upper end of the ejector pin 5.1 of the casting and the ejector pin bracket 5 is set in cooperation, the second motor 2.13 stops rotating forward. At this time, the extension block 4.3 on the mobile station 4 releases the casting and rotates 80 degrees away from the casting through the spring hinge, preventing the upper die 1.1 and the lower die 1.2 from colliding during mold closing and damaging the components.

[0062] At this time, the third motor 3.5 on the lifting mechanism 3 starts to rotate forward, driving the lead screw 3.6 arranged in cooperation with the output shaft of the third motor 3.5 to elongate, driving the sliding block 3.4 to slide away from the third motor 3.5 on the slide rail 3.3. The first support rod 3.7 on the sliding block 3.4 rotates away from the third motor 3.5 accordingly, causing the support table 3.2 to descend, the entire lifting mechanism 3 and the ejector pin bracket 5 to move downward, and the casting also moves downward accordingly, so that the casting is arranged in the lower die 1.2, completing the feeding operation.

[0063] Step 4: Hot pressing and shaping: The upper die 1.1 moves downward to close the mold with the lower die 1.2. The mold is heated to the preset temperature and kept warm. After the hot pressing and shaping is completed, the upper die 1.1 moves upward to separate from the lower die 1.2.

[0064] Step 5: Unloading: The lifting mechanism 3 rises, the support table 3.2 drives the ejector pin bracket 5 and the casting to move upward, and the casting is ejected from the lower die 1.2.

[0065] In Step 5, the specific steps of unloading are as follows: Step 51: The third motor 3.5 drives the lead screw 3.6 to rotate, driving the second slider to move away from the flipping mechanism 2, so that the support table 3.2 drives the ejector pin bracket 5 and the casting to move upward, and the casting is ejected from the lower die 1.2.

[0066] Step 52: The extension block 4.3 on the mobile station 4 rotates 80° towards the casting around the spring hinge, clamping the casting.

[0067] Step 53: The second motor 2.13 rotates, driving the turbine 2.17 and the third gear 2.18 to rotate. The third gear 2.18 drives the fourth gear 2.20 and the flipping block 2.21 to tilt through the rack 2.19. The mobile station 4 is fixedly connected to the flipping block 2.21, causing the mobile station 4 to rotate; the mobile station 4 continues to rotate, the inclination angle gradually increases, and the casting gradually disengages from the ejector pin bracket 5.

[0068] Step 54: The first motor 2.9 drives the first gear 2.10, driving the first connecting rod 2.3 and the second connecting rod 2.4 to rotate away from the machine tool frame 1, causing the upper end plate 2.1 and the mechanism fixedly installed on the upper end plate 2.1 to rotate, and the casting gradually moves away from the machine tool frame 1.

[0069] During operation, the third motor 3.5 on the lifting mechanism 3 starts to reverse, driving the screw rod 3.6 arranged in cooperation with the output shaft of the third motor 3.5 to contract, driving the sliding block 3.4 to slide on the slide rail 3.3 towards the third motor 3.5, and the first support rod 3.7 on the sliding block 3.4 rotates towards the third motor 3.5, causing the support table 3.2 to move upward, the entire lifting mechanism 3 and the thimble support 5 move upward, driving the casting to move upward accordingly, so as to eject the casting from the lower mold 1.2. Subsequently, the extension block 4.3 rotates 80 degrees towards the casting through the spring hinge and clamps the casting.

[0070] Subsequently, the second motor 2.13 starts to reverse, driving the worm 2.14 on its output shaft to rotate in the reverse direction, thereby causing the turbine 2.17 and the third gear 2.18 to rotate in the reverse direction. The rack 2.19 engaged with the lower end of the third rack 2.19 moves in a reverse linear motion on the first support plate 2.12, thereby causing the fourth gear 2.20 on the other side of the rack 2.19 to rotate in the reverse direction, driving the turntable to rotate in the reverse direction. During the rotation of the moving table 4, its inclination angle gradually increases. When it rotates until the casting is completely separated from the upper end of the thimble 5.1 of the thimble support 5 and there is a certain distance between them, the second motor 2.13 stops reversing.

[0071] Subsequently, the first motor 2.9 starts to reverse. Through the first gear 2.10 on the output shaft and the second gear 2.11 on the transmission shaft 2.7, it drives the first connecting rod 2.3 and the second connecting rod 2.4 to rotate away from the machine tool frame 1, transporting the moving table 4 and the casting on the flipping mechanism 2 out of the operation cavity 1.3 between the upper mold 1.1 and the lower mold 1.2, completing the blanking operation.

[0072] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A deformation control device for thin-walled die-castings based on local hot pressing and shaping, characterized in that: It includes a machine tool frame (1), a flipping mechanism (2) and a lifting mechanism (3) for hot pressing and shaping castings. The machine tool frame (1) includes an upper die (1.1) and a lower die (1.2). An operation cavity (1.3) is formed between the upper die (1.1) and the lower die (1.2). An assembly cavity (1.4) is provided at the lower end of the lower die (1.2). One end of the flipping mechanism (2) is fixedly connected to the side wall of the machine tool frame (1). The lifting mechanism (3) is arranged in the assembly cavity (1.4). A moving platform (4) is provided at the upper end of the flipping mechanism (2). The moving platform (4) holds the casting. The flipping mechanism (2) drives the moving platform (4) to transport the casting to the operation cavity (1.3), and the feeding is completed by the lifting mechanism (3). After hot pressing and shaping, the lifting mechanism (3) ejects the casting out of the lower die (1.2), and the flipping mechanism (2) drives the moving platform (4) to move the casting out of the operation cavity (1.3).

2. The deformation control device for thin-walled die-castings based on local hot pressing and shaping according to claim 1, characterized in that: The flipping mechanism (2) includes an upper end plate (2.1), a lower end plate (2.2), a first connecting rod (2.3), a second connecting rod (2.4) and a third connecting rod (2.5). A fixing plate (2.6) is provided on one side of the lower end plate (2.2). The fixing plate (2.6) is fixedly connected to the machine tool frame (1). The first connecting rod (2.3), the second connecting rod (2.4) and the third connecting rod (2.5) are connected to the lower end plate (2.2) through a central axis by a revolute pair. A transmission shaft (2.7) is designed between the first connecting rod (2.3) and the second connecting rod (2.4). The first connecting rod (2.3), the second connecting rod (2.4) and the third connecting rod (2.5) are connected to the upper end plate (2.1) through a central axis by a revolute pair. A guiding cylinder (2.8) is provided between the third connecting rod (2.5) and the lower end plate (2.2). The upper end of the guiding cylinder (2.8) is connected to the middle section of the third connecting rod (2.5) through a central axis by a revolute pair. The lower end of the guiding cylinder (2.8) is connected to the lower end plate (2.2) through a central axis by a revolute pair.

3. The deformation control device for thin-wall die-castings based on local hot pressing and shaping according to claim 2, wherein: A first motor (2.9) is provided on the lower end plate (2.2). A first gear (2.10) is provided on the output shaft of the first motor (2.9). A second gear (2.11) is fixedly connected to the transmission shaft (2.7). The first gear (2.10) meshes with the second gear (2.11).

4. A deformation control device for thin-walled die-castings based on local hot pressing and shaping according to claim 2, characterized in that: On the upper end surface of the upper end plate (2.1), a first support plate (2.12) is fixedly connected. On the upper end of the first support plate (2.12), a second motor (2.13) is provided. On the output shaft of the second motor (2.13), a worm (2.14) is provided. On the upper end plate (2.1), a connection block (2.15) is also provided. In the middle of the connection block (2.15), a connection shaft (2.16) is provided. At one end of the connection shaft (2.16), a turbine (2.17) is provided, and at the other end, a third gear (2.18) is provided. The turbine (2.17) meshes with the worm (2.14). On the first support plate (2.12), a rack (2.19) is provided. The third gear (2.18) is provided at one end of the rack (2.19). At the other end of the rack (2.19), a fourth gear (2.20) and a flipping block (2.21) are provided. The fourth gear (2.20) is fixedly connected to the flipping block (2.21) through a central shaft and is rotationally connected to the first support plate (2.12).

5. A thin-walled die-casting deformation control device based on local hot pressing and shaping according to claim 4, characterized in that: The moving table (4) is C-shaped. The moving table (4) includes a fixed section (4.1) and a connecting section (4.2). One end of the fixed section (4.1) close to the connecting section (4.2) is fixedly connected to the flipping block (2.21). On the fixed section (4.1), an extension block (4.3) is provided. The extension block (4.3) is connected to the fixed section (4.1) through a spring hinge. The extension block (4.3) clamps the casting.

6. The deformation control device for thin-walled die-castings based on local hot pressing and shaping according to claim 1, wherein: The lifting mechanism (3) includes a second support plate (3.1) and a support table (3.2). On the second support plate (3.1), a slide rail (3.3) is provided. On the slide rail (3.3), a sliding block (3.4) is provided. The sliding block (3.4) is in sliding connection with the slide rail (3.3). On the second support plate (3.1), a third motor (3.5) is provided. The coupling on the output shaft of the third motor (3.5) is connected to the sliding block (3.4) through a lead screw (3.6). On one side of the sliding block (3.4), a first support rod (3.7) is provided. One end of the first support rod (3.7) is rotationally connected to the sliding block (3.4), and the other end is rotationally connected to the support table (3.2). On the second support table (3.2), a second support rod (3.8) is provided. One end of the second support rod (3.8) is rotationally connected to the second support plate (3.1), and the other end is rotationally connected to the support table (3.2). The middle part of the first support rod (3.7) is hinged and cooperated with the middle part of the second support rod (3.8).

7. The deformation control device for thin-walled die-castings based on local hot pressing and shaping according to claim 6, wherein: On the upper end surface of the support table (3.2), a thimble support (5) is fixedly provided. On the upper end of the thimble support (5), a thimble (5.1) is provided. The thimble (5.1) passes through the lower die (1.2). The upper end of the thimble (5.1) is cooperated with the casting.

8. A method for controlling the deformation of thin-walled die-castings based on local hot pressing and shaping, according to a device for controlling the deformation of thin-walled die-castings based on local hot pressing and shaping described in any one of claims 1-7, characterized in that: Specifically, it includes the following steps: Step 1. Measuring data: Place the casting on the measuring device (6). The measuring device (6) determines whether the product needs to go through the hot pressing and shaping process by analyzing the edge deformation data. Step 2. Setting data: The moving table (4) of the hot pressing and shaping device clamps the casting to be hot pressed and shaped. The device calculates the heat preservation temperature and time for each unit based on the corresponding deformation data measured in Step 1. Step 3. Loading: Set the casting on the hot pressing and shaping machine tool through the flipping mechanism (2). The lifting mechanism (3) descends, driving the thimble support (5) and the casting to move downward, and the casting is placed in the lower mold (1.2). Step 4. Hot pressing and shaping: The upper mold (1.1) moves downward to close the mold with the lower mold (1.2). The mold is heated to the preset temperature and heat preservation is carried out. After the hot pressing and shaping is completed, the upper mold (1.1) moves upward to separate from the lower mold (1.2). Step 5. Unloading: The lifting mechanism (3) ascends, and the support table (3.2) drives the thimble support (5) and the casting to move upward, and the casting is ejected from the lower mold (1.2).

9. A method for controlling the deformation of thin-walled die-castings based on local hot pressing and shaping according to claim 8, characterized in that: In Step 3, the specific steps of loading are as follows: Step 31: The first motor (2.9) drives the first gear (2.10), driving the first connecting rod (2.3) and the second connecting rod (2.4) to rotate towards the direction close to the machine tool frame (1), causing the upper end plate (2.1) and the mechanism fixedly installed on the upper end plate (2.1) to rotate, and the casting gradually approaches the operation cavity (1.3) of the machine tool frame (1). Step 32: The second motor (2.13) rotates, driving the turbine (2.17) and the third gear (2.18) to rotate. The third gear (2.18) drives the fourth gear (2.20) and the flipping block (2.21) to tilt through the rack (2.19). The moving table (4) is fixedly connected to the flipping block (2.21), causing the moving table (4) to rotate; the moving table (4) continues to rotate, and the tilting angle gradually decreases. When the casting contacts the thimble (5.1) at the upper end of the thimble support (5), the casting separates from the moving table (4). Step 33: The extension block (4.3) on the moving table (4) rotates 80 degrees around the spring hinge towards the direction away from the casting to clamp the casting. Step 34: The third motor (3.5) drives the screw rod (3.6) to rotate, driving the sliding block (3.4) to move towards the direction close to the flipping mechanism (2), causing the support table (3.2) to drive the thimble support (5) and the casting to move downward, and place the casting on the lower mold (1.2).

10. A method for controlling the deformation of thin-walled die-castings based on local hot pressing and shaping according to claim 8, characterized in that: In Step 5, the specific steps of unloading are as follows: Step 51: The third motor (3.5) drives the screw rod (3.6) to rotate, driving the second slider to move towards the direction away from the flipping mechanism (2), causing the support table (3.2) to drive the thimble support (5) and the casting to move upward, and eject the casting from the lower mold (1.2). Step 52: The extension block (4.3) on the moving table (4) rotates 80 degrees around the spring hinge towards the direction close to the casting to clamp the casting. Step 53: The second motor (2.13) rotates, driving the turbine (2.17) and the third gear (2.18) to rotate. The third gear (2.18) drives the fourth gear (2.20) and the flipping block (2.21) to tilt through the rack (2.19). The moving table (4) is fixedly connected to the flipping block (2.21), causing the moving table (4) to rotate. The moving table (4) continues to rotate, and the tilting angle gradually increases, and the casting gradually disengages from the thimble support (5). Step 54: The first motor (2.9) drives the first gear (2.10), driving the first connecting rod (2.3) and the second connecting rod (2.4) to rotate away from the machine tool frame (1), causing the upper end plate (2.1) and the mechanism fixedly installed on the upper end plate (2.1) to rotate, and the casting gradually moves away from the machine tool frame (1).

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