Aluminum alloy stamping die

Abstract

The invention relates to the technical field of aluminum alloy machining, in particular to an aluminum alloy stamping die which comprises a lower die plate and an upper die plate located above the lower die plate, a lower die is detachably installed in the middle of the upper end face of the lower die plate, a die groove is formed in the middle of the lower die, and an anti-springback assembly is jointly arranged inside and outside the lower die; the anti-springback assembly comprises a filling base plate movably installed on the side wall of the die cavity, the size of the filling base plate is matched with the size of the side wall of the die cavity, a transmission sliding rod is fixedly installed on the side, close to the die cavity, of the filling base plate, the transmission sliding rod is slidably connected with the lower die, and a compression plate is fixedly installed between the ends, away from the filling base plate, of the transmission sliding rod; a compression cavity is formed in the position, corresponding to the compression plate, in the lower die, and an elastic gasket is fixedly installed on the side wall of the die groove. The lubricating effect of the lubricating oil is matched with filling of the die gap and adjustment of the blank holder force, so that the springback amount can be reduced, and the precision and stability of a stamping part are improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy stamping die. Background Art

[0002] Aluminum alloy stamping die is an important tool used for forming aluminum alloy materials. Its principle is to use the pressure and movement of the die to process aluminum alloy sheets or tubes into parts of the desired shape.

[0003] Aluminum alloy stamping dies usually consist of upper dies, lower dies, and guides. The upper and lower dies are connected by a die base. The upper die is connected to the punch press through a slider, and the lower die is mounted on the punch press workbench. During the stamping process, the die moves up and down and applies pressure, so that the aluminum alloy material deforms according to the shape of the die and is finally formed into the desired part. The elastic modulus of aluminum alloy is relatively low, which means that it is more susceptible to elastic deformation when subjected to external forces. When the external force is removed, the aluminum alloy will partially return to its original shape, resulting in a springback phenomenon.

[0004] In the existing technical solutions, the problem of springback of aluminum alloy during stamping is mostly solved by improving the shape and design of the mold and reasonably setting the position and number of draw ribs in the mold to reduce springback. However, in the mold design stage, the position of the draw rib is set according to the needs. Once the mold is manufactured, the position of the draw rib is relatively fixed. However, when aluminum alloy is stamped, the thickness of the aluminum alloy sheet has a great influence on the springback of the aluminum alloy stamping. When stamping aluminum alloy sheets of different thicknesses, the influence of the springback of the aluminum alloy sheet cannot be well met by the draw ribs of the established design. Summary of the invention

[0005] The purpose of the present invention is to provide an aluminum alloy stamping die, which can reduce the springback amount and improve the precision and stability of the stamping parts through the lubricating effect of lubricating oil, the filling of the die gap and the adjustment of the clamping force, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an aluminum alloy stamping die, comprising a lower die plate and an upper die plate located above the lower die plate, a lower die is detachably mounted at the middle position of the upper end surface of the lower die plate, a die groove is provided at the middle position of the lower die, and an anti-rebound component is provided on the inner and outer parts of the lower die;

[0007] The anti-rebound component includes a filling pad movably mounted on the side wall of the mold groove, the size of the filling pad matches the size of the side wall of the mold groove, a transmission slide is fixedly mounted on the side of the filling pad close to the mold groove, the transmission slide is slidably connected to the lower mold, a compression plate is fixedly mounted between the ends of multiple transmission slides away from the filling pad, a compression cavity is opened inside the lower mold corresponding to the compression plate, locking threaded push rods are penetrated at both front and rear ends of the lower mold, a plurality of locking threaded push rods are equidistantly arranged, the locking threaded push rods are threadedly connected to the lower mold, and an elastic gasket is fixedly mounted on the side wall of the mold groove.

[0008] Preferably, the inner and outer parts of the lower mold are also jointly provided with a guide drive assembly, and the guide drive assembly includes a positioning column slidably installed inside the lower mold, and the number of the positioning columns is set to be multiple.

[0009] Preferably, guide sleeves are rotatably mounted on the outer walls of the plurality of positioning posts, and a pressure plate is fixedly connected between the bottom ends of the plurality of positioning posts.

[0010] Preferably, an air cavity is opened inside the lower mold at a position corresponding to the pressure plate, and a return spring is fixedly installed inside the air cavity. There are multiple return springs, and the top end of the return spring is fixedly connected to the pressure plate. The depth of the air cavity matches the length of the positioning column, the pressure plate and the side walls of the air cavity fit together, and the air cavity and the compression chamber are connected to each other.

[0011] Preferably, a lubrication and cooling component is provided inside and outside the lower mold, and the lubrication and cooling component includes a lubrication oil channel opened inside the lower mold, and an elastic diaphragm is fixedly installed at the bottom end of the lubrication oil channel.

[0012] Preferably, an oil spray hole is provided on the upper end surface of the lower die, and the oil spray holes are provided in plurality and are distributed equidistantly, and the plurality of oil spray holes are interconnected with the lubricating oil passage.

[0013] Preferably, the lubrication and cooling assembly also includes an oil replenishing box detachably mounted on the left end of the lower mold, the bottom end of the oil replenishing box is fixedly connected to a connecting one-way conduit, and the end of the connecting one-way conduit away from the oil replenishing box passes through the lower mold and is connected to the lubricating oil channel.

[0014] Preferably, an upper mold is fixedly installed at the middle position of the bottom end surface of the upper mold plate, a mold convex is fixedly installed at the middle position of the upper mold, and the mold convex of the upper mold matches the mold groove of the lower mold.

[0015] Preferably, the inner and outer parts of the mold convex are jointly provided with a pressure-regulating demolding component, and the pressure-regulating demolding component includes an assembly air duct in an L-shaped structure opened inside the mold convex, and pressure-regulating side plates are slidably installed at the front and rear ends of the assembly air duct, and the compression depth of the pressure-regulating side plate is smaller than the depth of the corresponding end of the assembly air duct, and the end face of the pressure-regulating side plate away from the mold convex matches the side end face of the mold convex.

[0016] Preferably, a demoulding spring plate is slidably installed at the inner bottom end of the assembly air duct, and a spring is fixedly installed inside the assembly air duct. There are multiple springs and they are equidistantly distributed. The spring is fixedly connected to the demoulding spring plate, and the compression depth of the demoulding spring plate is less than the depth of the corresponding end of the assembly air duct.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can more effectively control the springback phenomenon of aluminum alloy sheets during the stamping process by adjusting the variable clamping force of aluminum alloy materials through the filling pad. By adjusting the size of the clamping force, the flow and plastic deformation of the material can be affected, thereby reducing the amount of springback. This adjustment can be made based on the characteristics of the aluminum alloy material, the thickness of the sheet material, and the required forming shape to achieve more accurate springback compensation. At the same time, the variable adjustment of the clamping force can also reduce defects such as wrinkles and cracks during the forming process, further improving the forming quality. The variable adjustment of the clamping force can flexibly adapt to these changes, ensuring that good forming effects and springback compensation can be obtained under different materials and process conditions. This flexibility helps to reduce production costs and improve production efficiency.

[0019] 2. The present invention adjusts the filling distance of the filling pad in the die groove, so that the filling pad has a larger thickness, so as to cope with the springback of aluminum alloy materials of different thicknesses. By adjusting the filling thickness of the filling pad, the springback can be accurately compensated, so that the shape of the part after stamping is more in line with the design requirements. And the thickness of the filling pad can be adjusted according to the thickness of the aluminum alloy material, so that the mold can adapt to materials of different thicknesses, improving the versatility and flexibility of the mold. By precalculating and setting the thickness of the filling pad, the time and cost of the mold debugging process can be reduced to a certain extent. Accurate filling pad setting helps to improve the success rate of mold debugging and reduce the risk of debugging failure due to springback problems.

[0020] 3. The present invention controls the blanking force at different positions by cooperating with the pressure-adjusting side plate and the demoulding spring plate, which can significantly reduce or even eliminate defects such as wrinkling, cracking and springback that occur during the forming process. Reasonable distribution of the blanking force helps to reduce the dimensional fluctuation of the stamped parts, thereby improving the overall stability and consistency of the stamping forming. Accurate blanking force control can reduce the scrap rate and rework rate during the stamping process, thereby improving production efficiency. At the same time, by optimizing the setting of the blanking force, the wear and maintenance cost of the mold can also be reduced, further reducing the production cost.

[0021] 4. The lubricating oil of the present invention is sprayed out from each oil spray hole, so that the aluminum alloy sheet to be stamped and the lower die are both adhered with lubricating oil. The lubricating oil can form a lubricating film between the aluminum alloy sheet and the die, significantly reducing the friction resistance, so that the aluminum alloy sheet can enter the mold cavity more smoothly, avoiding surface defects such as scratches and strains. During the stamping process, a large amount of friction heat and plastic deformation heat will be generated between the die and the aluminum alloy sheet. The lubricating oil can quickly absorb and take away this heat, reduce the temperature of the die and the aluminum alloy sheet, and prevent quality problems such as deformation and burns caused by overheating. At the same time, the lubricating effect of the lubricating oil can cooperate with the filling of the die gap and the adjustment of the clamping force, thereby reducing the amount of springback and improving the precision and stability of the stamped parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is the overall structural view of the present invention;

[0024] Figure 2 It is a schematic diagram of the lower die end face structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the bottom end surface structure of the upper template of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the upper mold of the present invention;

[0027] Figure 5 This is a schematic diagram of the internal structure of the lower mold of the present invention;

[0028] Figure 6 It is a schematic diagram of the internal structure of the compression chamber and the air chamber of the present invention;

[0029] Figure 7This is a schematic diagram of the internal structure of the lubrication and cooling component of the present invention;

[0030] Figure 8 For the present invention Figure 4 A schematic diagram of the partially enlarged structure at B in the middle;

[0031] Fig. 9 For the present invention Figure 6 Schematic diagram of the local enlarged structure at point A in the middle.

[0032] Description of reference numerals:

[0033] 1. Lower template; 2. Upper template; 3. Lower mold; 301. Mold groove; 4. Anti-rebound component; 401. Filling pad; 402. Transmission slide; 403. Elastic gasket; 404. Compression plate; 405. Compression chamber; 406. Locking threaded ejector; 5. Guide drive component; 501. Positioning column; 502. Guide sleeve; 503. Pressing plate; 504. Return spring; 505. Air cavity; 6. Lubrication and cooling component; 601. Lubrication oil channel; 602. Elastic diaphragm; 603. Oil injection hole; 604. Oil replenishment box; 605. Connecting one-way conduit; 7. Upper mold; 701. Mold convex; 8. Pressure regulating and demoulding component; 801. Pressure regulating side plate; 802. Demolding spring plate; 803. Spring; 804. Assembly air channel. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention provides a technical solution:

[0036] See also Figure 1 , Figure 2-Figure 5 , Figure 7 and Fig. 9 , an aluminum alloy stamping die, comprising a lower die plate 1 and an upper die plate 2 located above the lower die plate 1, a lower die 3 is detachably mounted in the middle of the upper end surface of the lower die plate 1, a die groove 301 is provided in the middle of the lower die 3, an anti-rebound component 4 is provided inside and outside the lower die 3, an upper die 7 is fixedly mounted in the middle of the bottom end surface of the upper die plate 2, a die convex 701 is fixedly mounted in the middle of the upper die 7, and the die convex 701 of the upper die 7 matches the die groove 301 of the lower die 3;

[0037] The anti-rebound component 4 includes a filling pad 401 movably mounted on the side wall of the die groove 301, the size of the filling pad 401 matches the size of the side wall of the die groove 301, a transmission slide 402 is fixedly mounted on the side of the filling pad 401 close to the die groove 301, the transmission slide 402 is slidably connected to the lower die 3, a compression plate 404 is fixedly mounted between the ends of multiple transmission slides 402 away from the filling pad 401, a compression cavity 405 is opened at the interior of the lower die 3 corresponding to the compression plate 404, locking threaded push rods 406 are penetrated at both front and rear ends of the lower die 3, a plurality of locking threaded push rods 406 are equidistantly arranged, the locking threaded push rods 406 are threadedly connected to the lower die 3, and an elastic gasket 403 is fixedly mounted on the side wall of the die groove 301.

[0038] By adopting the above technical solution, when in use, the stamping die is assembled on the impact machine. When stamping aluminum alloy, the upper template 2 is driven to move downward by the stamping machine, so that the upper die 7 of the upper template 2 can move downward together, so that the die convex 701 of the upper die 7 can stamp the aluminum alloy plate placed on the lower die 3. When the die convex 701 stamps the aluminum alloy material into the die groove 301, the filling pad 401 arranged in the gap between the die groove 301 and the die convex 701 can reduce the rebound of the aluminum alloy material during stamping, and improve the dimensional accuracy and consistency of the parts by reducing the dimensional deviation caused by the rebound. When the die convex 701 continues to stamp the aluminum alloy material into the die groove 301, the filling pad 401 is affected by the aluminum alloy. The extrusion of the sheet will move toward the inner wall of the die groove 301, thereby pushing the transmission slide bar 402 to move. When the transmission slide bar 402 moves, it can push the compression plate 404 to move toward the inner wall of the compression chamber 405, thereby squeezing the gas inside the compression chamber 405. In this process, as the filling pad 401 continuously compresses the compression chamber 405 through the transmission slide bar 402 and the compression plate 404, the reverse force of the compression chamber 405 on the filling pad 401 changes with the change of the compression depth, so the reverse force of the filling pad 401 on the aluminum alloy sheet also changes accordingly. The variable adjustment of the blanking force of the aluminum alloy material by the filling pad 401 can more effectively control the rebound phenomenon of the aluminum alloy sheet during the stamping process. By adjusting the size of the blanking force, the flow and plastic deformation degree of the material can be affected, thereby reducing the amount of rebound. This adjustment can be made based on the characteristics of the aluminum alloy material, the thickness of the sheet material and the required forming shape to achieve more accurate rebound compensation. By precisely controlling the blanking force, the forming accuracy of aluminum alloy sheet stamping parts can be significantly improved. The change of the blanking force can adjust the flow path and deformation mode of the material in the mold, so that the formed parts are more in line with the design requirements. At the same time, the variable adjustment of the blanking force can also reduce defects such as wrinkles and cracks during the forming process, and further improve the forming quality. The types and thicknesses of aluminum alloy sheets are diverse, and the stamping process conditions are also different. The variable adjustment of the blanking force can flexibly adapt to these changes, ensuring that good forming effects and rebound compensation can be obtained under different materials and process conditions. This flexibility helps to reduce production costs and improve production efficiency. The elastic gasket 403 is located between the side wall of the die groove 301 and the filling pad 401. When the filling pad 401 shrinks and is about to fit the side wall of the die groove 301, the filling pad 401 can cooperate with the elastic gasket 403 on the basis of the change of the blanking force generated by the compressed air, and further adjust the size of the blanking force generated by the filling pad 401 on the aluminum alloy sheet, thereby effectively controlling the rebound phenomenon of the aluminum alloy sheet during the stamping process.

[0039] At the same time, when reducing the springback compensation of aluminum alloy stamping, the filling amount is determined according to the required springback compensation amount usually obtained by experiment or simulation. The filling amount should be equal to or slightly greater than the springback compensation amount to ensure that the stamping can maintain the required shape and size after the force is removed. When stamping aluminum alloy materials of different thicknesses, the locking threaded push rod 406 is twisted, and the locking threaded push rod 406 can be rotated on the lower die 3 through the thread, so that the telescopic length of the locking threaded push rod 406 in the compression chamber 405 can be adjusted, and the filling distance of the filling pad 401 in the die groove 301 can be adjusted by the abutment of the locking threaded push rod 406 to the compression plate 404, so that the filling pad 401 can have a larger thickness, so that it can cope with the springback of aluminum alloy materials of different thicknesses. By adjusting the filling thickness of the filling pad 401, the springback can be accurately compensated, so that the shape of the part after stamping is more in line with the design requirements. And the thickness of the filling pad 401 can be adjusted according to the thickness of the aluminum alloy material, so that the mold can adapt to materials of different thicknesses, and improve the versatility and flexibility of the mold. By precalculating and setting the thickness of the filling pad 401, the time and cost of the mold debugging process can be reduced to a certain extent. Accurate setting of the filling pad 401 helps to improve the success rate of mold debugging and reduce the risk of debugging failure caused by rebound problems.

[0040] Specifically, Figure 1 , Figure 3 , Figure 4 and Figure 8 As shown, the inside and outside of the mold convex 701 are jointly provided with a pressure-adjusting demoulding component 8, and the pressure-adjusting demoulding component 8 includes an assembly airway 804 with an L-shaped structure opened inside the mold convex 701, and the pressure-adjusting side plates 801 are slidably installed at both the front and rear ends of the assembly airway 804, and the compression depth of the pressure-adjusting side plates 801 is less than the depth of the corresponding end of the assembly airway 804, and the end surface of the side of the pressure-adjusting side plate 801 away from the mold convex 701 matches the side end surface of the mold convex 701. A demoulding spring plate 802 is slidably installed at the bottom end of the assembly airway 804, and a spring 803 is fixedly installed inside the assembly airway 804, and the number of springs 803 is set in multiple and equidistant distribution, and the spring 803 is fixedly connected to the demoulding spring plate 802, and the compression depth of the demoulding spring plate 802 is less than the depth of the corresponding end of the assembly airway 804.

[0041] By adopting the above technical solution, when the die protrusion 701 moves downward to fit the aluminum alloy plate, the demoulding spring plate 802 will first contact the aluminum alloy plate. In this way, during the continuous stamping process, the demoulding spring plate 802 will shrink into the assembly air channel 804 and compress the spring 803 in the assembly air channel 804. At the same time, it will also compress the gas in the assembly air channel 804, so that the compressed air presses against the side pressure regulating side plate 801. When the demoulding spring plate 802 is completely shrunk into the assembly air channel 804, the When the aluminum alloy sheet is stamped, the lower end of the die convex 701 can be used to stamp the aluminum alloy sheet. When the sheet is bent, the pressure regulating side plate 801 will squeeze the aluminum alloy sheet. When the pressure regulating side plate 801 squeezes the aluminum alloy sheet, the pressure regulating side plate 801 will shrink and slide, and finally shrink into the assembly airway 804. In this way, the pressure regulating side plate 801 and the demoulding spring plate 802 can cooperate to achieve the control of the blanking force at different positions, which can significantly reduce or even eliminate the defects such as wrinkling, cracking and rebound in the forming process. The reasonable distribution of the blanking force helps to reduce the dimensional fluctuation of the stamping parts, thereby improving the overall stability and consistency of the stamping forming. Aluminum alloy sheet stamping parts usually have complex shapes and size requirements. By adjusting the blanking force in different directions of the mold, these changes can be better adapted. Accurate blanking force control can reduce the scrap rate and rework rate in the stamping process, thereby improving production efficiency. At the same time, by optimizing the blanking force setting, the wear and maintenance cost of the mold can also be reduced, further reducing the production cost. When the stamping is completed, the demoulding spring plate 802 can be ejected from the assembly air channel 804 under the elastic restoring action of the spring 803, so as to avoid the stamped aluminum alloy sheet being stuck in the die protrusion 701 and being inconvenient to demould. Therefore, the stamped aluminum alloy sheet can be demoulded through the cooperation of the demoulding spring plate 802 and the spring 803.

[0042] Specifically, Figure 1 , Figure 2 , Figure 5-Figure 7 and Fig. 9As shown, the inner and outer parts of the lower mold 3 are also jointly provided with a guide drive assembly 5, which includes a positioning column 501 slidably installed inside the lower mold 3, and the number of the positioning columns 501 is set in plurality; guide sleeves 502 are rotatably installed on the outer walls of the plurality of positioning columns 501, and a pressure plate 503 is fixedly connected between the bottom ends of the plurality of positioning columns 501; an air cavity 505 is opened at the interior of the lower mold 3 corresponding to the pressure plate 503, and a return spring 504 is fixedly installed inside the air cavity 505, and the number of the return spring 504 is set in plurality, and the top end of the return spring 504 is fixedly connected to the pressure plate 503, the depth of the air cavity 505 matches the length of the positioning column 501, the pressure plate 503 and the side walls of the air cavity 505 fit each other, and the air cavity 505 and the compression chamber 405 are connected to each other. The inside and outside of the lower mold 3 are jointly provided with a lubrication and cooling component 6, which includes a lubrication oil channel 601 opened in the lower mold 3, and an elastic diaphragm 602 is fixedly installed at the bottom end of the lubrication oil channel 601, and the lubrication oil channel 601 can be separated from the compression chamber 405 by the elastic diaphragm 602; an oil injection hole 603 is opened on the upper end surface of the lower mold 3, and the number of the oil injection holes 603 is set in multiple and equidistant distribution, and the multiple oil injection holes 603 are interconnected with the lubrication oil channel 601; the lubrication and cooling component 6 also includes an oil replenishing box 604 detachably installed on the left end of the lower mold 3, and the bottom end of the oil replenishing box 604 is fixedly connected with a connecting one-way conduit 605, and the end of the connecting one-way conduit 605 away from the oil replenishing box 604 passes through the lower mold 3 and is connected with the lubrication oil channel 601.

[0043] By adopting the above technical scheme, when in use, the aluminum alloy plate to be processed is placed in the middle position of the lower die 3. When the aluminum alloy moves from one end of the lower die 3 to the other end, the aluminum alloy plate will move under the limit of the positioning column 501, so as to avoid the problem of deflection of the aluminum alloy plate during movement. When the aluminum alloy plate moves, the edge of the plate will contact the guide sleeve 502 of the positioning column 501, and the guide sleeve 502 is rotatably installed on the positioning column 501, so that the rotatably installed guide sleeve 502 can guide the moving aluminum alloy plate. Therefore, during the stamping process of the aluminum alloy plate, the mutual cooperation between the positioning column 501 and the guide sleeve 502 can play a positioning and guiding effect on the aluminum alloy plate, ensuring the convenience of the aluminum alloy plate during loading and the accuracy of the position placement, thereby ensuring the forming accuracy of the aluminum alloy plate stamping parts. When the lower die 3 moves downward, the bottom surface of the lower die 3 squeezes the positioning column 501, and the positioning column 501 moves downward under the extrusion of the lower die 3. When the pressure plate 503 moves downward, the positioning column 501 can drive the pressure plate 503 to move downward. The downward movement of the pressure plate 503 can compress the gas in the air cavity 505, and the return spring 504 will also be squeezed during the downward movement of the pressure plate 503, so that the return spring 504 is in an energy storage compression state. When the pressure plate 503 and the positioning column 501 are not under pressure, they can be reset by the return spring 504; at the same time, when the gas in the air cavity 505 and the gas in the compression cavity 405 are compressed, the compressed gas pushes the elastic diaphragm 602 to bounce upward, so that the elastic diaphragm 602 can squeeze the lubricating oil in the lubricating oil channel 601, so that the lubricating oil in the lubricating oil channel 601 can be sprayed out from each oil injection hole 603, so that the aluminum alloy sheet to be stamped and the lower mold 3 are both adhered with lubricating oil, and the lubricating oil can form a lubricating film between the aluminum alloy sheet and the mold, which significantly reduces the friction resistance, so that the aluminum alloy sheet can enter the mold cavity more smoothly, avoiding scratches, strains and other surface defects. Lubricating oil can reduce the direct contact between the die and the aluminum alloy sheet, thereby reducing the wear rate of the die and extending the service life of the die. During the stamping process, a large amount of friction heat and plastic deformation heat will be generated between the die and the aluminum alloy sheet. Lubricating oil can quickly absorb and take away this heat, reduce the temperature of the die and the aluminum alloy sheet, and prevent quality problems such as deformation and burns caused by overheating. Through the cooling effect, lubricating oil helps to maintain the stability and precision of the die and ensure that the size and shape accuracy of the stamped parts meet the requirements. The lubricating and cooling effects of lubricating oil help optimize the forming performance of aluminum alloy sheets, making it easier to achieve the desired shape and size. At the same time, the lubricating effect of lubricating oil can cooperate with the filling of the die gap and the adjustment of the blank holding force, thereby reducing the amount of springback and improving the precision and stability of stamped parts.When the stamping is completed, the elastic diaphragm 602 is reset without the action of air pressure squeezing, and the oil missing in the lubricating oil channel 601 can be replenished from the oil replenishing box 604 through the connected one-way conduit 605, thereby ensuring the adequacy of the lubricating oil in the lubricating oil channel 601.

[0044] Working principle: When in use, first, place the aluminum alloy sheet to be processed in the middle position of the lower die 3. When the aluminum alloy moves from one end of the lower die 3 to the other end, the aluminum alloy sheet will move under the limit of the positioning column 501, so as to avoid the problem of the aluminum alloy sheet being deflected during movement. When the aluminum alloy sheet moves, the edge of the sheet will contact the guide sleeve 502 of the positioning column 501, and the guide sleeve 502 is rotatably installed on the positioning column 501, so that the rotatably installed guide sleeve 502 can guide the moving aluminum alloy sheet. Therefore, during the stamping process of the aluminum alloy sheet, the mutual cooperation between the positioning column 501 and the guide sleeve 502 can play a positioning and guiding effect on the aluminum alloy sheet.

[0045] Secondly, when stamping the aluminum alloy, the upper mold plate 2 is driven downward by the punching machine, so that the upper mold 7 of the upper mold plate 2 can move downward together, so that the mold convex 701 of the upper mold 7 can stamp the aluminum alloy plate placed on the lower mold 3, and when the lower mold 3 moves downward, the bottom surface of the lower mold 3 squeezes the positioning column 501, and the positioning column 501 moves downward under the squeezing action of the lower mold 3, and the positioning column 501 can drive the pressing plate 503 to move downward, and the downward movement of the pressing plate 503 can compress the gas in the air cavity 505; at the same time, when the gas in the air cavity 505 is compressed, the compressed gas pushes the elastic diaphragm 602 to bounce upward, so that the elastic diaphragm 602 can squeeze the lubricating oil in the lubricating oil channel 601, so that the lubricating oil in the lubricating oil channel 601 can be sprayed out from each oil injection hole 603, so that the aluminum alloy plate to be stamped and the lower mold 3 are both adhered with lubricating oil; When the die convex 701 moves downward to fit the aluminum alloy plate, the demoulding spring plate 802 will first contact the aluminum alloy plate. In this way, during the continuous stamping process, the demoulding spring plate 802 will shrink into the assembly air channel 804 and compress the spring 803 in the assembly air channel 804. At the same time, it will also compress the gas in the assembly air channel 804, so that the compressed air presses against the side pressure-regulating side plate 801. When the demoulding spring plate 802 is completely retracted into the assembly air channel 804, the aluminum alloy plate can be stamped through the lower end of the die convex 701. When the plate is bent, the pressure-regulating side plate 801 will squeeze the aluminum alloy plate. When the pressure-regulating side plate 801 squeezes the aluminum alloy plate, the pressure-regulating side plate 801 will shrink and slide, and finally shrink into the assembly air channel 804. In this way, the pressure-regulating side plate 801 and the demoulding spring plate 802 can cooperate to control the edge clamping force at different positions.

[0046] Finally, when the die convex 701 punches the aluminum alloy material into the die groove 301, the filling pad 401 disposed in the gap between the die groove 301 and the die convex 701 can reduce the rebound of the aluminum alloy material during the punching. When the die convex 701 continues to punch the aluminum alloy material into the die groove 301, the filling pad 401 is squeezed by the aluminum alloy sheet and moves toward the inner side wall of the die groove 301, thereby pushing the transmission slide 402 to move. When the transmission slide 402 moves, it can push the compression plate 404 to the compression cavity 405. The inner wall moves, thereby squeezing the gas inside the compression chamber 405. During this process, as the filling pad 401 continues to compress the compression chamber 405 through the transmission slide bar 402 and the compression plate 404, the reverse force of the compression chamber 405 on the filling pad 401 changes with the change of the compression depth. Therefore, the reverse force of the filling pad 401 on the aluminum alloy plate also changes accordingly. The variable adjustment of the clamping force of the aluminum alloy material by the filling pad 401 can more effectively control the rebound phenomenon of the aluminum alloy plate during the stamping process.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aluminum alloy stamping die, comprising a lower die plate (1) and an upper die plate (2) located above the lower die plate (1), characterized in that: A lower mold (3) is detachably mounted in the middle of the upper end surface of the lower mold plate (1), a mold groove (301) is provided in the middle of the lower mold (3), and an anti-rebound component (4) is provided inside and outside the lower mold (3); The anti-rebound component (4) comprises a filling pad (401) movably mounted on the side wall of the die groove (301), the size of the filling pad (401) matches the size of the side wall of the die groove (301), a transmission slide bar (402) is fixedly mounted on the side of the filling pad (401) close to the die groove (301), the transmission slide bar (402) is slidably connected to the lower die (3), and a plurality of the transmission slide bars (402) are arranged on one side away from the filling pad (401). A compression plate (404) is fixedly installed between the ends, a compression chamber (405) is opened inside the lower mold (3) at a position corresponding to the compression plate (404), locking threaded push rods (406) are passed through the front and rear ends of the lower mold (3), and a plurality of locking threaded push rods (406) are arranged equidistantly, the locking threaded push rods (406) are threadedly connected to the lower mold (3), and an elastic gasket (403) is fixedly installed on the side wall of the mold groove (301).

2. The aluminum alloy stamping die according to claim 1, characterized in that: The inner and outer parts of the lower mold (3) are also provided with a guide drive assembly (5), and the guide drive assembly (5) includes a positioning column (501) slidably installed inside the lower mold (3), and the number of the positioning columns (501) is set to be multiple.

3. The aluminum alloy stamping die according to claim 2, characterized in that: A guide sleeve (502) is rotatably mounted on the outer wall of each of the plurality of positioning posts (501), and a pressing plate (503) is fixedly connected between the bottom ends of the plurality of positioning posts (501).

4. The aluminum alloy stamping die according to claim 3, characterized in that: An air cavity (505) is provided inside the lower mold (3) at a position corresponding to the pressure plate (503), and a return spring (504) is fixedly installed inside the air cavity (505). There are multiple return springs (504), and the top end of the return spring (504) is fixedly connected to the pressure plate (503). The depth of the air cavity (505) matches the length of the positioning column (501), the pressure plate (503) and the side wall of the air cavity (505) are in contact with each other, and the air cavity (505) and the compression chamber (405) are connected to each other.

5. The aluminum alloy stamping die according to claim 4, characterized in that: The inner and outer parts of the lower mold (3) are jointly provided with a lubrication and cooling component (6), and the lubrication and cooling component (6) comprises a lubrication oil channel (601) opened inside the lower mold (3), and an elastic diaphragm (602) is fixedly installed at the bottom end of the lubrication oil channel (601).

6. The aluminum alloy stamping die according to claim 5, characterized in that: The upper end surface of the lower mold (3) is provided with an oil spray hole (603), and the number of the oil spray holes (603) is multiple and equidistantly distributed, and the multiple oil spray holes (603) are interconnected with the lubricating oil channel (601).

7. The aluminum alloy stamping die according to claim 6, characterized in that: The lubrication and cooling component (6) also includes an oil replenishing box (604) detachably mounted on the left end of the lower mold (3); the bottom end of the oil replenishing box (604) is fixedly connected to a connecting one-way conduit (605); the end of the connecting one-way conduit (605) away from the oil replenishing box (604) passes through the lower mold (3) and is connected to the lubricating oil channel (601).

8. The aluminum alloy stamping die according to claim 1, characterized in that: An upper mold (7) is fixedly installed at the middle position of the bottom end surface of the upper mold plate (2), and a mold convex (701) is fixedly installed at the middle position of the upper mold (7). The mold convex (701) of the upper mold (7) matches the mold groove (301) of the lower mold (3).

9. The aluminum alloy stamping die according to claim 8, characterized in that: The inside and outside of the mold convex (701) are jointly provided with a pressure regulating demoulding component (8), and the pressure regulating demoulding component (8) includes an assembly air channel (804) with an L-shaped structure opened inside the mold convex (701), and pressure regulating side plates (801) are slidably installed at the front and rear ends inside the assembly air channel (804), and the compression depth of the pressure regulating side plate (801) is less than the depth of the corresponding end of the assembly air channel (804), and the side end surface of the pressure regulating side plate (801) away from the mold convex (701) matches the side end surface of the mold convex (701).

10. The aluminum alloy stamping die according to claim 9, characterized in that: A demoulding spring plate (802) is slidably mounted on the inner bottom end of the assembly air channel (804), and a spring (803) is fixedly mounted inside the assembly air channel (804). The number of the springs (803) is multiple and equidistantly distributed. The springs (803) are fixedly connected to the demoulding spring plate (802), and the compression depth of the demoulding spring plate (802) is less than the depth of the corresponding end of the assembly air channel (804).

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