Aluminum profile stamping die and stamping method

Abstract

The invention relates to the technical field of aluminum profile machining, in particular to an aluminum profile stamping die which comprises an air cylinder, an upper die frame, a stamping head and a lower die frame and further comprises a main telescopic frame, an auxiliary telescopic frame, an air exhaust mechanism, a pressurizing piston and an air blowing mechanism. The main telescopic frame is installed between the upper die frame and the lower die frame, and the auxiliary telescopic frame is installed between the upper die frame and the stamping head; the air exhaust mechanism is connected with the lower die frame, the pressurizing piston is connected with the air exhaust mechanism and installed in the lower die frame, the air blowing mechanism is connected with the air exhaust mechanism, and the upper die frame moves up and down and sequentially passes through a point a, a point b and a point c. And downward stress is generated in the middle of the aluminum profile, the attaching degree of the aluminum profile and the lower die frame is improved, meanwhile, air is blown to the aluminum profile, eddy current is generated in the middle of the aluminum profile for heat dissipation, and the situation that the aluminum profile rebounds due to the stress is avoided.

Description

Technical Field

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

[0002] Aluminum profile is an alloy material with aluminum as the main component. When processing aluminum profile, stamping process is needed to make the stamped parts bear force according to the shape of the mold, resulting in separation or plastic deformation, so as to obtain workpieces that meet the needs of the enterprise. Aluminum profile is generally formed by stamping. Because the ambient temperature is room temperature when processing the sheet material, the stamping process is often called sheet forming or cold stamping to distinguish it from other metal processing methods. Both large covers and small parts can be processed and are used in transportation, aerospace, household goods and other industries.

[0003] Aluminum profiles are widely used in lamps. When producing lamps, the profiles need to be stamped and formed, especially arc-shaped lamps. When stamping arc-shaped lamps, the aluminum profile will generate heat due to the concentration of stress, and the heat will cause the aluminum profile to expand. When the punch head is separated from the aluminum profile, the aluminum profile will begin to cool when in contact with the air. During the cooling process, the volume of the aluminum profile decreases, which will cause rebound. At the same time, the aluminum profile will experience different stress states, which are unevenly distributed during the processing. When the processing is completed and the external force is removed, the stress inside the material will be redistributed, also causing the shape to rebound. Once the aluminum profile rebounds, it is easy to collide with the bottom of the punch head, causing the punch head to bear additional pressure and friction during the processing, which may cause wear or damage to the punch head. Over time, it is easy to reduce the stamping accuracy of the aluminum profile.

[0004] In view of the above problems, the prior art provides a solution. For example, patent publication number CN114192673A provides a cold stamping controlled rebound die. This solution drives the telescopic rod to slide by a push plate, and the telescopic rod drives the piston to slide in the piston barrel. The gas in the second cavity is extracted on one side of the piston barrel, and the gas on the other side of the piston barrel is discharged into the first cavity. The second cavity is in a negative pressure state, and the horizontal forming surface of the punch adsorbs the steel plate on it. The side forming surface of the punch provides an inward suction force, which assists the steel plate to deflect inward to a certain extent, so as to solve the problem of part stamping rebound. Although the prior art can adsorb aluminum profiles through negative pressure to prevent the rebound of the aluminum profiles from impacting the punch head, the aluminum profiles are adsorbed when being adsorbed. The smaller area results in a smaller adsorption force on the aluminum profile, and no pressure is applied to the two ends of the aluminum profile, which makes it easy for the two ends of the aluminum profile to warp up after the forming is completed. As the amplitude of the end rebound becomes larger and larger, it is easy to cause a reverse force on the area of ​​negative pressure adsorption, which is easy to cause the aluminum profile to gradually break free from the adsorption of negative pressure under the action of the rebound force, thereby increasing the amplitude of the rebound. In order to prevent the two ends of the aluminum profile from warping up, the existing technology adopts a secondary stamping method, which will reduce the efficiency of aluminum profile stamping. In addition, the aluminum profile will generate heat during stamping. The presence of heat leads to poor stability of the aluminum profile and a decrease in the elastic modulus. During the cooling process, the residual stress in the aluminum profile will gradually be released, which makes the aluminum profile easy to rebound.

[0005] Therefore, a stamping die and a stamping method for aluminum profile are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an aluminum profile stamping die and a stamping method, so as to solve the problem in the prior art that the aluminum profile is easily freed from negative pressure adsorption due to natural cooling after stamping, thereby producing more violent rebound. Negative pressure is generated to adsorb the aluminum profile after stamping, and at the same time, the two ends of the aluminum profile are pressed to ensure that the bottom end of the aluminum profile is in contact with the top end of the lower mold frame, thereby improving the stability of the aluminum profile, and blowing air to the aluminum profile to accelerate the cooling speed of the aluminum profile, which can further improve the stability of the aluminum profile to prevent the aluminum profile from rebounding.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An aluminum profile stamping die comprises a cylinder, an upper die frame, a punch head and a lower die frame, and also comprises a main telescopic frame, a secondary telescopic frame, an air extraction mechanism, a booster piston and an air blowing mechanism. The main telescopic frame is installed between the upper die frame and the lower die frame, the secondary telescopic frame is installed between the upper die frame and the punch head, the air extraction mechanism is connected to the lower die frame, the booster piston is connected to the air extraction mechanism and is installed inside the lower die frame, the air blowing mechanism is connected to the air extraction mechanism, and the upper die frame moves up and down and blows air in sequence. After passing through points a, b, and c, when moving from c to b, the exhaust mechanism drives the booster piston to pressurize the lower mold frame, and controls one end of the exhaust mechanism to be flush with the mold cavity of the lower mold frame; when moving from b to a, the punch head punches the aluminum profile; when moving from a to b, the exhaust mechanism drives the booster piston to move to generate negative pressure and adsorb the aluminum profile; at the same time, the air blowing mechanism generates wind and blows toward the stamped profile; when moving from b to c, the air blowing mechanism continues to blow air toward the profile.

[0009] In the above scheme, under the action of the main telescopic frame, the upper mold frame can be driven to rise before the punch head, so that the booster piston can be driven to move in the lower mold frame through the vacuum mechanism, and negative pressure is generated to adsorb the aluminum profile that is bonded to the lower mold frame under the action of the punch head after stamping. When the punch head is separated from the aluminum profile, the air blowing mechanism presses the two ends of the aluminum profile and blows air to the aluminum profile at the same time. The gaps generated at the two ends of the aluminum profile gather at the center of the aluminum profile, which increases the cooling speed of the aluminum profile and can avoid the rebound of the aluminum profile caused by thermal expansion and contraction.

[0010] Preferably, the elastic coefficient of the main telescopic frame is greater than the elastic coefficient of the secondary telescopic frame, and two groups of the main telescopic frame and the secondary telescopic frame are respectively provided.

[0011] In the above scheme, it can be ensured that the upper mold frame rises before the punch head, and the punch head can fit the aluminum profile when the upper mold frame moves a certain distance, which can facilitate the vacuum mechanism to adsorb the aluminum profile. The number and installation position of the main telescopic frame and the secondary telescopic frame are set to improve the stability between the upper mold frame and the lower mold frame.

[0012] Optionally, in order to prevent the aluminum profile from rebounding after stamping, the aluminum profile can be extruded from top to bottom to allow the aluminum profile to fit with the lower mold frame under the action of pressure, or the aluminum profile can be fit with the lower mold frame by negative pressure adsorption. If extrusion is adopted from top to bottom, the aluminum profile will rebound at the moment the punch head and the aluminum profile are separated, and it is impossible to extrude the aluminum profile at the moment of separation. There will be an obstruction between the punch head and the extrusion device, which will cause the rebounded aluminum profile to collide with the punch head. Therefore, extrusion from top to bottom is not adopted to prevent the aluminum profile from rebounding.

[0013] Preferably, the vacuum mechanism includes a vertical rack, a driving gear, a driven gear, an arc-shaped rack and an adsorption unit, the vertical rack is installed at the bottom end of the upper mold frame, the driving gear cooperates with the vertical rack, the driven gear cooperates with the driving gear, the arc-shaped rack cooperates with the driven gear, the booster piston is installed at one end of the arc-shaped rack, a flow channel is opened inside the lower mold frame, and the booster piston, vertical rack, driving gear, driven gear and arc-shaped rack are all installed inside the flow channel.

[0014] In the above scheme, the vertical rack drives the driving gear to rotate as it follows the upper mold frame to descend, and drives the arc-shaped rack to move through the driven gear. When moving, the arc-shaped rack drives the booster piston to move in the flow channel and generates negative pressure on the adsorption unit. Under the action of negative pressure, the adsorption unit will move toward the flow channel and generate negative pressure for the second time to achieve adsorption of the aluminum profile.

[0015] Preferably, the gear ratio of the driving gear to the driven gear is 3:1-2:1, the arc-shaped rack includes a toothed portion and a toothless portion, and when the upper mold frame is located at point c, the toothed portion and the toothless portion are symmetrically arranged with the driven gear as the center.

[0016] In the above scheme, in order to ensure that the driven gear rotates at a faster speed than the driving gear, the booster piston can be controlled to move first, thereby controlling the adsorption unit to generate negative pressure to adsorb the aluminum profile, thereby preventing the aluminum profile from rebounding when the punch head is separated from the aluminum profile.

[0017] Preferably, the adsorption unit includes a steel piston and a return spring, an air hole connected to the flow channel is opened inside the lower mold frame, the steel piston matches the air hole, the top of the steel piston matches the top of the lower mold frame, and the return spring is installed between the steel piston and the air hole.

[0018] In the above scheme, the booster piston can adsorb the steel piston under the action of negative pressure when moving, thereby controlling the steel piston to move in the direction of the flow channel and squeezing the return spring, so that negative pressure can be generated between the steel piston, the air hole and the aluminum profile, and secondary negative pressure can be generated to adsorb the aluminum profile, which can improve the anti-rebound effect of the aluminum profile.

[0019] Preferably, a pressure relief groove communicating with the flow channel is provided inside the lower mold frame, the pressure relief groove is arc-shaped, and the inner diameter of the pressure relief groove is greater than the width of the booster piston.

[0020] In the above scheme, the outside air can be transported into the flow channel to ensure that the air pressure in the flow channel is consistent with the outside air pressure, so that the steel piston can lose the negative pressure and reset under the action of the reset spring, and fill the air hole to ensure that the top of the steel piston is flush with the top of the lower mold frame, thereby preventing the aluminum profile from being dented due to the presence of air holes during stamping.

[0021] Optionally, after the stamping of the aluminum profile is completed, the aluminum profile can be quickly cooled under negative pressure, or it can be naturally cooled under negative pressure. If natural cooling is used, the cooling effect of the aluminum profile will be reduced, causing the aluminum profile to be affected by thermal stress for a longer time, making it easy for the aluminum profile to break free from the negative pressure, thereby causing the aluminum profile to rebound more. Therefore, natural cooling is not used to cool the aluminum profile under negative pressure.

[0022] Preferably, the hair dryer mechanism includes a fixed shaft, fan blades, an extrusion plate, an extrusion spring and a guide unit, the fixed shaft is installed at one end of the driving gear, the fan blades are circumferentially installed on the outer wall of the fixed shaft, the extrusion plate is installed inside the lower mold frame and cooperates with the fan blades, the extrusion spring is installed between the extrusion plate and the lower mold frame, the guide unit is installed inside the lower mold frame, the length of the fan blade is consistent with the length of the extrusion plate, and an arc portion is provided at one end of the fan blade.

[0023] In the above scheme, when the driving gear rotates, it drives the fan blades to rotate through the fixed shaft, so that wind can be generated in the flow channel. While the wind is generated, the extrusion plate is reciprocated and extruded, so that the wind can be blown into the guide unit. The wind blows toward the aluminum profile through the guide unit. Since there is wind at both ends of the aluminum profile, the wind at both ends collides and generates eddy currents in the center of the aluminum profile, which can improve the heat exchange and cooling effects, thereby accelerating the cooling of the aluminum profile and preventing the aluminum profile from being affected by thermal stress for a long time.

[0024] Preferably, the guide unit includes a conical extrusion block, a pressure-bearing rod, a connecting rod, a guide block and a limit block. The conical extrusion block is installed at one end of the arc-shaped rack. An air groove connected to the flow channel is opened inside the lower mold frame. The air groove and the flow channel are in circulation. The pressure-bearing rod is installed in the air groove, the connecting rod is connected to the pressure-bearing rod, the guide block is connected to the connecting rod, and the limit block is connected to the guide block.

[0025] In the above scheme, the arc-shaped rack squeezes the pressure rod through the conical extrusion block when moving, and squeezes the guide block under the action of the connecting rod, thereby driving the guide block to move downward and pressing the two ends of the aluminum profile. When the two ends of the aluminum profile are under pressure, the middle part of the aluminum profile will generate downward stress, thereby ensuring that the bottom end of the aluminum profile fits with the top end of the lower mold frame, and the fitting effect of the aluminum profile and the lower mold frame is improved under the action of negative pressure, which can prevent the aluminum profile from breaking free from the negative pressure and rebounding.

[0026] Preferably, the air inlet end of the air groove is trumpet-shaped, the air outlet end of the air groove is arc-shaped with an opening downward, and a guide groove having the same curvature as the lower mold frame is provided at one corner of the guide block.

[0027] In the above scheme, the wind can be more conveniently introduced into the air slot, the wind can be gathered, the air volume can be increased to improve the cooling effect, and the wind can be guided to blow toward the aluminum profile.

[0028] A method for using an aluminum profile stamping die comprises the following steps:

[0029] S1: When the upper die frame drives the punch head to descend, the vertical rack drives the driving gear to rotate counterclockwise, and drives the driven gear to rotate clockwise at the same time, and drives the booster piston to move toward the center of the lower die frame in the flow channel through the arc-shaped rack. The air pressure in the flow channel increases, and the steel piston is controlled to move upward under the action of the return spring, so that the top of the steel piston is kept flush with the top of the lower die frame. When the punch head continues to descend, it will punch the profile;

[0030] S2: When the stamping of the profile is completed, the upper die frame is controlled to rise before the punching head under the action of the main telescopic frame and the secondary telescopic frame, and the upper die frame drives the vertical rack to rise, and the clockwise rotating active gear drives the driven gear to rotate counterclockwise, thereby driving the arc-shaped rack to move up in the flow channel, and the pressure-bearing rod is squeezed by the conical extrusion block, so that the guide block can be pressed down to abut against the two ends of the formed profile to keep the profile and the lower die frame in contact. When the active gear rotates clockwise, the fan blade is driven to rotate clockwise through the fixed shaft. When the fan blade rotates, it reciprocates and squeezes the extrusion plate, so that the wind generated by the rotation of the fan blade can be blown to the air groove, and then the wind is blown to the surface of the formed profile through the guide block;

[0031] S3: When the arc-shaped rack moves upward in the flow channel, it simultaneously drives the booster piston to move. When the booster piston moves upward, it extracts air from the flow channel, generating negative pressure in the flow channel. Under the action of negative pressure, the steel piston is pulled, and negative pressure is generated between the steel piston and the profile. The profile is adsorbed on the top of the lower mold frame through the secondary negative pressure to keep the profile and the lower mold frame in contact. When the booster piston moves to the middle of the pressure relief groove, external air enters the flow channel through the pressure relief groove, and the air pressure in the flow channel is restored. After the steel piston loses the negative pressure from the flow channel, it is reset under the action of the reset spring, and the pressure-bearing rod also loses the pressure reset from the conical extrusion block, so that the profile can be easily removed after losing the pressure.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. When the arc-shaped rack moves, it squeezes the pressure rod through the conical extrusion block, and presses the guide block under the action of the connecting rod, which can control the bottom end of the guide block to abut against the two ends of the aluminum profile. The two ends of the aluminum profile are respectively subjected to the pressure of the guide block, which will cause the middle part of the aluminum profile to be subjected to downward stress. At the same time, it can prevent the two ends of the aluminum profile from warping up, and can prevent the aluminum profile from generating tearing force from the two ends to the middle. In addition, since the bottom end of the aluminum profile is supported by the lower mold frame, the fit between the aluminum profile and the lower mold frame can be improved, the adsorption effect of the steel piston on the aluminum profile can be improved, and the rebound of the aluminum profile can be avoided.

[0034] 2. When the booster piston is driven to move toward the two ends of the flow channel by the arc-shaped rack, negative pressure is generated between the two booster pistons, and the steel piston is adsorbed under the action of negative pressure. When the steel piston moves toward the flow channel, negative pressure is also generated between the steel piston, the air hole and the aluminum profile. The superposition of the two negative pressures can adsorb the aluminum profile, ensuring that the bottom end of the aluminum profile fits with the top end of the lower mold frame, and avoiding the rebound when the aluminum profile is separated from the punch head.

[0035] 3. When the driving gear rotates, it drives the fan blades to rotate through the rotating shaft, and reciprocates the extrusion plate through the fan blades, which can blow air while generating wind, and blow the wind to the aluminum profile through the guide block. Since there is wind at both ends of the aluminum profile, the wind at both ends collides in the middle of the aluminum profile and generates eddy currents. The existence of eddy currents can improve the heat exchange and cooling effects, increase the cooling speed of the aluminum profile, shorten the time that the aluminum profile is affected by thermal stress, and accelerate the aluminum profile to a stable state. When the aluminum profile is in a stable state, rebound can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0037] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the lower mold frame and the air extraction mechanism of the present invention;

[0038] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of F;

[0039] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the lower mold frame and the hair dryer structure of the present invention;

[0040] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of G;

[0041] Figure 6 It is a partial front cross-sectional structural diagram of the lower mold frame, the air extraction mechanism and the air blowing mechanism when the punch head of the present invention is located at point c;

[0042] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of H in the middle;

[0043] Figure 8 It is a schematic diagram of the partial front cross-sectional structure of the lower mold frame, the air exhaust mechanism and the air blower mechanism when the punch head of the present invention is located at point a.

[0044] In the figure: 1. cylinder; 2. upper die frame; 3. punch head; 4. lower die frame; 5. main telescopic frame; 6. secondary telescopic frame; 7. exhaust mechanism; 71. vertical rack; 72. driving gear; 73. driven gear; 74. arc rack; 741. toothed portion; 742. toothless portion; 75. adsorption unit; 751. steel piston; 752. return spring; 753. air hole; 76. flow channel; 77. pressure relief groove; 8. booster piston; 9. blower mechanism; 91. fixed shaft; 92. fan blade; 93. extrusion plate; 94. extrusion spring; 95. guide unit; 951. conical extrusion block; 952. pressure bearing rod; 953. connecting rod; 954. guide block; 955. limit block; 956. air groove; 957. guide groove; 96. arc portion. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. However, the embodiments described below are only some embodiments of the present invention, not all of them. If other embodiments of ordinary technicians in this field are obtained without making creative work, they all belong to the protection scope of the present invention.

[0046] Reference Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 8, an aluminum profile stamping die, including a cylinder 1, an upper die frame 2, a punch head 3 and a lower die frame 4, and also including a main telescopic frame 5, a secondary telescopic frame 6, an exhaust mechanism 7, a booster piston 8, and a blower mechanism 9. The main telescopic frame 5 is installed between the upper die frame 2 and the lower die frame 4. Through the setting of the main telescopic frame 5, the upper die frame 2 can be connected with the lower die frame 4, and the lifting of the upper die frame 2 can be limited, which can prevent the upper die frame 2 from being deflected relative to the lower die frame 4 during lifting, and can improve the matching degree between the upper die frame 2 and the lower die frame 4. The secondary telescopic frame 6 is installed between the upper die frame 2 and the punch head 3. Through the setting of the secondary telescopic frame 6, the punch head 3 can be connected with the upper die frame 2. The elastic coefficient of the main telescopic frame 5 is greater than the elastic coefficient of the secondary telescopic frame 6. The above arrangement is to realize that the main telescopic frame 5 moves before the secondary telescopic frame 6, so that the upper mold frame 2 can move before the punch head 3, thereby generating a time difference, so that the upper mold frame 2 moves upward for a certain distance, and the punch head 3 is still in contact with the aluminum profile, ensuring that the punch head 3 can apply a relatively long pressure to the aluminum profile, and adsorb the aluminum profile under the action of the exhaust mechanism 7. The main telescopic frame 5 and the secondary telescopic frame 6 are respectively provided with two groups. The above arrangement is to improve the stability of the connection between the upper mold frame 2 and the lower mold frame 4, and ensure that the upper mold The frame 2, the punch head 3 and the lower die frame 4 are kept at the same horizontal line, so as to avoid the upper die frame 2 and the punch head 3 from being deflected relative to the lower die frame 4 when moving. The air suction mechanism 7 is connected to the lower die frame 4, and the booster piston 8 is connected to the air suction mechanism 7 and installed inside the lower die frame 4. The booster piston 8 can be driven by the air suction mechanism 7 to move in the flow channel 76, so as to generate negative pressure in the flow channel 76. Under the action of the negative pressure, the bottom end of the aluminum profile can be adsorbed to keep the bottom end of the aluminum profile in contact with the top end of the lower die frame 4, which can avoid the aluminum profile from rebounding. The air blowing mechanism 9 is connected to the air suction mechanism 7. The air blowing mechanism 9 can not only Tightening can prevent the aluminum profile from generating a large rebound force to break free from the negative pressure of the exhaust mechanism 7, which can improve the fit between the aluminum profile and the lower mold frame 4. The upper mold frame 2 moves up and down and passes through points a, b, and c in sequence. When moving from c to b, the exhaust mechanism 7 drives the booster piston 8 to pressurize the lower mold frame 4, and controls one end of the exhaust mechanism 7 to be flush with the mold cavity of the lower mold frame 4. When moving from b to a, the punch head 3 punches the aluminum profile. When moving from a to b, the exhaust mechanism 7 drives the booster piston 8 to move to generate negative pressure and adsorb the aluminum profile. At the same time, the air blowing mechanism 9 generates wind and blows towards the stamped profile. When moving from b to c, the air blowing mechanism 9 continues to blow air towards the profile.

[0047] As an embodiment of the present invention, refer to Figure 2 , Figure 3 , Figure 6 and Figure 8The air extraction mechanism 7 includes a vertical rack 71, a driving gear 72, a driven gear 73, an arc-shaped rack 74 and an adsorption unit 75. The vertical rack 71 is installed at the bottom end of the upper mold frame 2. The driving gear 72 cooperates with the vertical rack 71. Through the setting of the vertical rack 71, the driving gear 72 can be driven to rotate clockwise or counterclockwise during the lifting and lowering of the upper mold frame 2. The driven gear 73 cooperates with the driving gear 72. Through the rotation of the driving gear 72, the driven gear 73 can be driven to rotate. The gear ratio of the driving gear 72 to the driven gear 73 is 3:1-2:1. Through the above setting, the speed of the driven gear 73 can be faster than that of the driving gear 72. , through the rotation of the driven gear 73, the arc-shaped rack 74 can be driven to drive the booster piston 8 to move quickly, and the negative pressure can be generated in the flow channel 76 within the time difference between the upper mold frame 2 and the punch head 3 to achieve the adsorption of the aluminum profile. The arc-shaped rack 74 cooperates with the driven gear 73. Through the setting of the arc-shaped rack 74, the booster piston 8 can be driven to move when the driven gear 73 rotates. The arc-shaped rack 74 includes a toothed portion 741 and a toothless portion 742. When the upper mold frame 2 is located at point c, the toothed portion 741 and the toothless portion 742 are symmetrically arranged with the driven gear 73 as the center. By limiting the meshing length of the arc-shaped rack 74 and the driven gear 73 , the distance that the arc-shaped rack 74 drives the booster piston 8 to move can be set, and the obstruction between the arc-shaped rack 74 and the lower mold frame 4 can be prevented. The booster piston 8 is installed at one end of the arc-shaped rack 74. A flow channel 76 is opened inside the lower mold frame 4. By setting the flow channel 76, a movement space can be provided for the booster piston 8. When the booster piston 8 moves toward the end of the flow channel 76, negative pressure will be generated in the flow channel 76, so that the aluminum profile is adsorbed by the adsorption unit 75 to ensure that the bottom end of the aluminum profile is in contact with the top end of the lower mold frame 4. The booster piston 8, the vertical rack 71, the driving gear 72, the driven gear 73 and the arc-shaped rack 74 are all installed inside the flow channel 76. The lower mold frame 4 A pressure relief groove 77 communicating with the flow channel 76 is provided inside, and the pressure relief groove 77 is arranged in an arc shape. The above arrangement is to allow the aluminum profile to become stable after being adsorbed for a period of time, and to allow outside air to be filled into the flow channel 76 to ensure that the air pressure in the flow channel 76 is consistent with the outside air pressure, so that the adsorption unit 75 can be reset. After the resetting, the pressure of the adsorption unit 75 is restored, so that the aluminum profile is no longer adsorbed by negative pressure, and the aluminum profile can be conveniently collected. The inner diameter of the pressure relief groove 77 is greater than the width of the booster piston 8. The above arrangement can avoid the booster piston 8 from blocking the pressure relief groove 77 when moving, and can prevent outside air from entering the flow channel 76.

[0048] As an embodiment of the present invention, refer to Figure 2 and Figure 6The adsorption unit 75 includes a steel piston 751 and a return spring 752. An air hole 753 connected to the flow channel 76 is provided inside the lower mold frame 4. The mold cavity of the lower mold frame 4 can be connected to the flow channel 76 by providing the air hole 753. At the same time, the steel piston 751 and the return spring 752 can be installed, and space can be provided for the movement of the steel piston 751 and the return spring 752. The steel piston 751 matches the air hole 753. When the steel piston 751 moves in the air hole 753 toward the flow channel 76, negative pressure is generated in the air hole 753, so that the aluminum profile can be adsorbed. When the steel piston 751 moves in the air hole 753 toward the mold cavity of the lower mold frame 4, the air pressure in the air hole 753 is restored, thereby realizing the loss of negative pressure adsorption of the aluminum profile, which is convenient for collecting the aluminum profile. The top of the steel piston 751 matches the top of the lower mold frame 4, and the reset spring 752 is installed between the steel piston 751 and the air hole 753. When the air pressure in the flow channel 76 is restored, the steel piston 751 loses the adsorption force of the negative pressure, and under the action of the reset spring 752, the steel piston 751 is controlled to move in the air hole 753 toward the mold cavity of the lower mold frame 4, thereby realizing the recovery of the air pressure in the air hole 753.

[0049] As an embodiment of the present invention, refer to Figure 4 and Figure 5 The blower mechanism 9 includes a fixed shaft 91, a fan blade 92, an extrusion plate 93, an extrusion spring 94 and a guide unit 95. The fixed shaft 91 is installed at one end of the driving gear 72, and the fan blade 92 is circumferentially installed on the outer wall of the fixed shaft 91. The setting of the fixed shaft 91 facilitates the installation of the fan blade 92, and at the same time ensures that the fan blade 92 and the driving gear 72 rotate at the same speed. The extrusion plate 93 is installed inside the lower mold frame 4 and cooperates with the fan blade 92. The fan blade 92 can cyclically squeeze the extrusion plate 93 when rotating. The extrusion plate 93 reciprocates under the action of pressure, the elasticity of the extrusion spring 94 and its own gravity, thereby achieving the effect of blowing, and can blow the wind generated by the rotation of the fan blade 92 to the guide unit. 95, and the wind is blown to the aluminum profile through the guide unit 95 to cool the aluminum profile. The extrusion spring 94 is installed between the extrusion plate 93 and the lower mold frame 4. Through the setting of the extrusion spring 94, the extrusion plate 93 can be provided with elasticity, which can facilitate the reciprocating motion of the extrusion plate 93. The guide unit 95 is installed inside the lower mold frame 4. The length of the fan blade 92 is consistent with the length of the extrusion plate 93. An arc portion 96 is provided at one end of the fan blade 92. Through the above-mentioned setting, it can be ensured that the extrusion plate 93 and the fan blade 92 can be fully in contact, and the extrusion plate 93 can be evenly stressed. At the same time, it can avoid large friction between the fan blade 92 and the extrusion plate 93, and the fan blade 92 and the extrusion plate 93 can be protected.

[0050] As an embodiment of the present invention, refer to Figure 7The guide unit 95 includes a conical extrusion block 951, a pressure rod 952, a connecting rod 953, a guide block 954 and a limit block 955. The conical extrusion block 951 is installed at one end of the arc-shaped rack 74. The pressure rod 952 can be extruded by setting the conical extrusion block 951. An air groove 956 connected to the flow channel 76 is opened inside the lower mold frame 4. The air groove 956 is circulated with the flow channel 76. The air groove 956 can be conveniently transported by the extrusion plate 93 by setting the pressure rod 952. In the air slot 956, the air inlet end of the air slot 956 is horn-shaped. Through the above arrangement, more wind can be collected to ensure that the wind can smoothly enter the air slot 956. The air outlet end of the air slot 956 is an arc-shaped opening downward. Through the above arrangement, the flow direction of the wind can be limited and guided. The connecting rod 953 is connected to the pressure-bearing rod 952. The pressure-bearing rod 952 is rotatably installed in the air slot 956, playing the role of a lever. When one end of the pressure-bearing rod 952 is tilted close to the arc-shaped rack 74, the other end will be lowered. The guide block 954 is pushed down through the connecting rod 953, and the bottom end of the guide block 954 can be pressed against the two ends of the aluminum profile. When the pressure rod 952 is close to the arc-shaped rack 74, the limit block 955 is pushed to reset in the limit groove e under the action of the buffer spring d, so that the pressure rod 952 can be pushed by the connecting rod 953 to accelerate the descending speed of the pressure rod 952 close to the arc-shaped rack 74. The guide block 954 is connected to the connecting rod 953, and the limit block 955 is connected to the guide block 954. The guide block 954 is connected to the lower mold frame 4, and a guide groove 957 with the same curvature as the lower mold frame 4 is set at one corner. By setting the guide groove 957, the wind can be guided to blow toward the aluminum profile. Wind will blow through both ends of the aluminum profile. The wind collides in the middle of the aluminum profile and generates eddy currents, which can accelerate the cooling speed of the aluminum profile, accelerate the shaping of the aluminum profile, and prevent the aluminum profile from rebounding. A limiting groove e is opened inside the lower mold frame 4, and the limiting block 955 is installed in the limiting groove e. A buffer spring d is installed between the limiting groove e and the limiting block 955.

[0051] A stamping method for an aluminum profile stamping die comprises the following steps:

[0052] S1: The cylinder 1 controls the upper die frame 2 to descend. When the upper die frame 2 descends, it descends before the punch head 3 due to the time difference between the main telescopic frame 5 and the secondary telescopic frame 6. When the upper die frame 2 drives the punch head 3 to descend, the vertical rack 71 drives the driving gear 72 to rotate counterclockwise, and drives the driven gear 73 to rotate clockwise at the same time. Since the driven gear 73 is meshed with the arc-shaped rack 74, when the driven gear 73 rotates, it drives the booster piston 8 to move toward the center of the lower die frame 4 in the flow channel 76 through the arc-shaped rack 74. The air pressure in the flow channel 76 increases, and under the action of the return spring 752, the steel piston 751 is controlled to move upward, so that the top of the steel piston 751 is kept flush with the top of the lower die frame 4. When the punch head 3 continues to descend, it will punch the profile;

[0053] S2: When the stamping of the profile is completed, the upper mold frame 2 is controlled to rise before the punch head 3 under the action of the main telescopic frame 5 and the secondary telescopic frame 6. The upper mold frame 2 drives the vertical rack 71 to rise, and drives the driven gear 73 to rotate counterclockwise through the clockwise rotating active gear 72. When the driven gear 73 rotates, it drives the booster piston 8 to move to both ends of the flow channel 76 through the arc-shaped rack 74. As the booster piston 8 moves, negative pressure is generated in the flow channel 76. Under the action of negative pressure, the steel piston 751 will move in the air hole 753 toward the flow channel 76 and squeeze the reset spring 752. Negative pressure is generated at the top of the air hole 753. The negative pressures are superimposed on each other to achieve the adsorption of the aluminum profile. The arc-shaped rack 74 is in the flow When the guide block 954 moves upward in the channel 76, the pressure-bearing rod 952 is squeezed by the conical extrusion block 951, and the guide block 954 can be pressed down to abut against the two ends of the formed profile to keep the profile in contact with the lower mold frame 4. When the driving gear 72 rotates clockwise, the fan blade 92 is driven to rotate clockwise through the fixed shaft 91. When the fan blade 92 rotates, it reciprocates with the extrusion plate 93. The extrusion plate 93 swings up and down under the action of the extrusion spring 94, and the wind generated by the rotation of the fan blade 92 can be blown to the air groove 956, and then blown to the surface of the formed profile through the guide block 954. The wind collides in the middle along the upper arc surface of the aluminum profile and generates eddy currents, thereby improving the heat dissipation efficiency of the aluminum profile.

[0054] S3: When the booster piston 8 moves to the middle of the two pressure relief grooves 77, the external air enters the flow channel 76 through the pressure relief groove 77, and the air pressure in the flow channel 76 is restored. After the steel piston 751 loses the negative pressure from the flow channel 76, it is reset under the action of the reset spring 752, and the pressure-bearing rod 952 also loses the pressure reset from the conical extrusion block 951. The profile is easy to remove after losing pressure.

[0055] Although the embodiments of the present invention have been described in detail in conjunction with the accompanying drawings, it is apparent to those skilled in the art that changes, modifications, substitutions and deformations may be made to these embodiments without departing from the principles and spirit of the present invention. The appended claims and their equivalents define the scope of the present invention.

Claims

1. An aluminum profile stamping die, comprising a cylinder (1), an upper die frame (2), a punch head (3) and a lower die frame (4), characterized in that: The invention also comprises a main telescopic frame (5), a secondary telescopic frame (6), an air extraction mechanism (7), a pressure-boosting piston (8), and an air blowing mechanism (9); the main telescopic frame (5) is installed between the upper mold frame (2) and the lower mold frame (4); the secondary telescopic frame (6) is installed between the upper mold frame (2) and the punch head (3); the air extraction mechanism (7) is connected to the lower mold frame (4); the pressure-boosting piston (8) is connected to the air extraction mechanism (7) and is installed inside the lower mold frame (4); the air blowing mechanism (9) is connected to the air extraction mechanism (7); the upper mold frame (2) moves up and down and is pressed in sequence. After passing through points a, b, and c, when moving from c to b, the exhaust mechanism (7) drives the booster piston (8) to increase the pressure in the lower mold frame (4), and controls one end of the exhaust mechanism (7) to be flush with the mold cavity of the lower mold frame (4); when moving from b to a, the punch head (3) punches the aluminum profile; when moving from a to b, the exhaust mechanism (7) drives the booster piston (8) to move to generate negative pressure and adsorb the aluminum profile; at the same time, the air blowing mechanism (9) generates wind and blows toward the stamped profile; when moving from b to c, the air blowing mechanism (9) continues to blow toward the profile.

2. The aluminum profile stamping die according to claim 1, characterized in that: The elastic coefficient of the main telescopic frame (5) is greater than the elastic coefficient of the secondary telescopic frame (6), and two groups of the main telescopic frame (5) and the secondary telescopic frame (6) are respectively provided.

3. The aluminum profile stamping die according to claim 1, characterized in that: The air extraction mechanism (7) comprises a vertical rack (71), a driving gear (72), a driven gear (73), an arc-shaped rack (74) and an adsorption unit (75); the vertical rack (71) is mounted on the bottom end of the upper mold frame (2); the driving gear (72) cooperates with the vertical rack (71); the driven gear (73) cooperates with the driving gear (72); the arc-shaped rack (74) cooperates with the driven gear (73); the booster piston (8) is mounted on one end of the arc-shaped rack (74); a flow channel (76) is provided inside the lower mold frame (4); the booster piston (8), the vertical rack (71), the driving gear (72), the driven gear (73) and the arc-shaped rack (74) are all mounted inside the flow channel (76).

4. The aluminum profile stamping die according to claim 3, characterized in that: The gear ratio of the driving gear (72) to the driven gear (73) is 3:1-2:1, the arc-shaped rack (74) comprises a toothed portion (741) and a toothless portion (742), and when the upper mold frame (2) is located at point c, the toothed portion (741) and the toothless portion (742) are symmetrically arranged with the driven gear (73) as the center.

5. The aluminum profile stamping die according to claim 4, characterized in that: The adsorption unit (75) comprises a steel piston (751) and a return spring (752); an air hole (753) communicating with the flow channel (76) is provided inside the lower mold frame (4); the steel piston (751) matches the air hole (753); the top end of the steel piston (751) matches the top end of the lower mold frame (4); and the return spring (752) is installed between the steel piston (751) and the air hole (753).

6. The aluminum profile stamping die according to claim 5, characterized in that: A pressure relief groove (77) communicating with the flow channel (76) is provided inside the lower mold frame (4); the pressure relief groove (77) is arranged in an arc shape; and the inner diameter of the pressure relief groove (77) is greater than the width of the booster piston (8).

7. The aluminum profile stamping die according to claim 6, characterized in that: The blower mechanism (9) comprises a fixed shaft (91), a fan blade (92), an extrusion plate (93), an extrusion spring (94) and a guide unit (95); the fixed shaft (91) is mounted on one end of the driving gear (72); the fan blade (92) is circumferentially mounted on the outer wall of the fixed shaft (91); the extrusion plate (93) is mounted inside the lower mold frame (4) and cooperates with the fan blade (92); the extrusion spring (94) is mounted between the extrusion plate (93) and the lower mold frame (4); the guide unit (95) is mounted inside the lower mold frame (4); the length of the fan blade (92) is consistent with the length of the extrusion plate (93); and an arc portion (96) is provided at one end of the fan blade (92).

8. The aluminum profile stamping die according to claim 7, characterized in that: The guide unit (95) comprises a conical extrusion block (951), a pressure-bearing rod (952), a connecting rod (953), a guide block (954) and a limit block (955); the conical extrusion block (951) is mounted on one end of the arc-shaped rack (74); an air groove (956) connected to the flow channel (76) is provided inside the lower mold frame (4); the air groove (956) is in communication with the flow channel (76); the pressure-bearing rod (952) is mounted in the air groove (956); the connecting rod (953) is connected to the pressure-bearing rod (952); the guide block (954) is connected to the connecting rod (953); and the limit block (955) is connected to the guide block (954).

9. The aluminum profile stamping die according to claim 8, characterized in that: The air inlet end of the air groove (956) is arranged in a trumpet shape, the air outlet end of the air groove (956) is arranged in an arc shape with an opening downward, and a guide groove (957) having the same curvature as the lower mold frame (4) is arranged at one corner of the guide block (954).

10. A stamping method applicable to the aluminum profile stamping die according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: When the upper die frame (2) drives the punch head (3) to descend, the vertical rack (71) drives the driving gear (72) to rotate counterclockwise, and drives the driven gear (73) to rotate clockwise, and drives the booster piston (8) to move toward the center of the lower die frame (4) in the flow channel (76) through the arc-shaped rack (74), the air pressure in the flow channel (76) increases, and under the action of the return spring (752), the steel piston (751) is controlled to move upward, so that the top of the steel piston (751) is kept flush with the top of the lower die frame (4), and the punch head (3) will punch the profile when it continues to descend; S2: After the stamping of the profile is completed, the upper die frame (2) is controlled to rise before the punch head (3) under the action of the main telescopic frame (5) and the secondary telescopic frame (6), and the upper die frame (2) drives the vertical rack (71) to rise, and drives the driven gear (73) to rotate counterclockwise through the clockwise rotating driving gear (72), thereby driving the arc-shaped rack (74) to move upward in the flow channel (76), and squeezes the pressure rod (952) through the conical extrusion block (951), which can The guide block (954) is pressed down until it contacts the two ends of the formed profile to keep the profile in close contact with the lower mold frame (4); when the driving gear (72) rotates clockwise, the fan blade (92) is driven to rotate clockwise through the fixed shaft (91); when the fan blade (92) rotates, it reciprocates and squeezes the extrusion plate (93), so that the wind generated by the rotation of the fan blade (92) can be blown toward the air groove (956), and then the wind is blown toward the surface of the formed profile through the guide block (954); S3: When the arc-shaped rack (74) moves upward in the flow channel (76), it simultaneously drives the booster piston (8) to move. When the booster piston (8) moves upward, it extracts air from the flow channel (76), generating negative pressure in the flow channel (76). Under the action of the negative pressure, the steel piston (751) is pulled, and negative pressure is generated between the steel piston (751) and the profile. The profile is adsorbed on the top of the lower mold frame (4) through the secondary negative pressure, and the profile and the lower mold frame (4) are kept in contact. When the booster piston (8) moves to the middle of the pressure relief groove (77), external air enters the flow channel (76) through the pressure relief groove (77), and the air pressure in the flow channel (76) is restored. After the steel piston (751) loses the negative pressure from the flow channel (76), it is reset under the action of the reset spring (752), and the pressure-bearing rod (952) also loses the pressure from the conical extrusion block (951) and resets. After the profile loses the pressure, it is easy to remove.

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