An automobile evaporator fin stamping forming device

Abstract

The application relates to the field of metal stamping forming equipment, and discloses an automobile evaporator fin stamping forming device which comprises a rack, a hydraulic cylinder is fixedly installed at the top of the rack, the output end of the hydraulic cylinder faces downward and is fixedly connected with an upper die holder, a lower die holder matched with the upper die holder in up-down die closing is fixedly installed at the bottom of the inner side of the rack, a plurality of connecting columns are fixedly installed at the bottom of the upper die holder, driving rollers are rollingly connected to the bottom ends of the connecting columns, two fixing seats are symmetrically installed at the inner side of the lower die holder, a connecting groove is formed in the inner part of the fixing seat, and a side shaping plate is transversely and slidably connected in the connecting groove. Through the mechanical linkage structure of the upper die holder, the driving rollers, wedge-shaped driving blocks and the side shaping plate, edge correction and shaping can be simultaneously realized in the same stamping forming procedure of the fins, an additional shaping station or an independent driving component is not needed, the equipment structure is effectively simplified, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of metal stamping equipment, specifically to a stamping device for automotive evaporator fins. Background Technology

[0002] Evaporator fins are a core component of automotive air conditioning heat exchange systems. They are typically made of thin aluminum or aluminum alloy sheets through a stamping process. The forming precision, edge smoothness, and dimensional consistency of the evaporator directly affect its heat exchange efficiency and assembly reliability. Currently, the industry primarily uses conventional stamping forming equipment for processing automotive evaporator fins, mainly completing the stamping forming of the fins through mold closing.

[0003] Because the stamping punch and forming components of existing equipment are arranged separately, it is impossible to apply synchronous constraint and correction to the sides of the newly formed fins during the stamping and mold closing process. This results in defects such as side warping, vertical edge skew, and poor overall dimensional consistency of the fins after demolding. To solve these problems, existing equipment usually requires the addition of an independent forming station after the stamping station, or the use of manual hand-held fixtures for secondary correction. This method not only increases the number of processes and equipment footprint, raising production costs, but also causes scratches, local deformation, or even breakage on the fin surface due to secondary clamping and secondary stress, making it difficult to meet the requirements of high-precision mass production.

[0004] Meanwhile, existing fin stamping devices generally adopt a fixed side-stop positioning structure and lack an automatic centering mechanism that is linked to the mold opening and closing stroke. After the blank is fed into the lower mold, it is only limited on one side by a fixed stop, which makes the blank prone to lateral movement and displacement during stamping. This results in asymmetrical fin tooth profiles and a high scrap rate.

[0005] A solution is proposed to address this issue. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automotive evaporator fin stamping and forming apparatus, which solves the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a stamping and forming device for automotive evaporator fins, comprising a frame, a hydraulic cylinder fixedly mounted on the top of the frame, an upper die base fixedly connected to the output end of the hydraulic cylinder facing downwards, a lower die base fixedly mounted on the inner bottom of the frame to cooperate with the upper die base in a mold-closing manner, a plurality of connecting columns fixedly mounted on the bottom of the upper die base, drive rollers rotatably connected to the bottom ends of the connecting columns, and two fixed seats symmetrically mounted on the inner side of the lower die base, each fixed seat having a connecting groove inside. A side shaping plate is laterally slidably connected to the upper mold base; a sliding rod is laterally slidably connected to the inner through hole of the fixed base, and a wedge-shaped drive block is fixedly connected to one end of the sliding rod; an avoidance groove matching the number and position of the connecting columns is opened on the inner side of the lower mold base; when the hydraulic cylinder drives the upper mold base to move downward to close the mold, the connecting columns and the drive rollers extend downward into the avoidance grooves simultaneously, the drive rollers roll into contact with the inclined surface of the wedge-shaped drive block and push the wedge-shaped drive block to move laterally, and then drive the side shaping plate to move towards the fin direction through the sliding rod, so as to synchronously shape and correct the edge of the stamped automotive evaporator fin.

[0008] The above technical solution transforms the mold closing motion into the lateral shaping action of the side shaping plate through the mechanical cooperation of the upper mold base, connecting column, drive roller and wedge drive block. This allows for edge correction to be completed while the fins are being stamped, reducing fin warping and skewing, improving the consistency of the forming dimensions, and eliminating the need for separate drive components, making it simple and fast.

[0009] Preferably, one end of the slide rod is fixedly connected to the outer wall of the side shaping plate, and the other end of the slide rod is fixedly connected to the wedge-shaped drive block. A return spring is provided between the fixed seat and the side shaping plate. The return spring is located in the connecting groove. When the upper mold seat moves upward to reset, the return spring drives the side shaping plate and the wedge-shaped drive block to automatically return to their original positions.

[0010] The above technical solution enables the side forming plate and wedge-shaped drive block to reliably reset after forming, ensuring the consistency of the mechanism's cyclic operation and providing a stable preparation state for the next stamping and forming action.

[0011] Preferably, a drive rack is fixedly installed on the rear side of the upper mold base, and a bidirectional screw is rotatably connected to the inner side of the lower mold base via a bearing. Two threaded blocks are symmetrically threaded on the outer side of the bidirectional screw, and a positioning plate is fixedly connected to the top of the threaded blocks. The drive rack meshes with the drive gear, and the drive gear is coaxially fixedly connected to the bidirectional screw. When the upper mold base moves downward, the drive rack moves downward and drives the drive gear to rotate, thereby causing the bidirectional screw to rotate synchronously, driving the two positioning plates to move closer to each other, thus realizing automatic centering and positioning of the fin blank.

[0012] The above technical solution utilizes the clamping power to achieve automatic centering and clamping of fin blanks, reducing blank offset and movement, and improving stamping position accuracy and product forming consistency.

[0013] Preferably, a positioning block is fixedly provided on the lower die base. The positioning block is used for initial limiting and rough positioning of the fin blank, thereby improving the fin feeding and stamping positioning accuracy.

[0014] The above technical solution allows for initial positioning of the billet during the feeding stage, reducing manual feeding deviations, providing a foundation for subsequent precise positioning, and further improving overall positioning reliability.

[0015] Preferably, the upper surface of the wedge-shaped drive block is configured as an inclined guide surface, and the drive roller rolls along the inclined guide surface.

[0016] The above technical solution smoothly transforms the vertical mold closing motion into a horizontal shaping thrust, reducing transmission friction and making the shaping action smoother and more stable.

[0017] Preferably, the lower mold base has two mounting slots inside, and an electromagnetic adsorption block is fixedly installed in the mounting slot. An mounting plate is fixedly connected to the outside of one of the electromagnetic adsorption blocks, and multiple cleaning brushes are evenly installed on the lower surface of the mounting plate. When the electromagnetic adsorption block is energized and generates magnetic attraction, it drives the mounting plate to move along the mounting slot. The cleaning brushes move synchronously with the mounting plate to automatically clean the aluminum chips or waste materials remaining in the molding cavity of the lower mold base.

[0018] The above technical solution can automatically remove residual waste and aluminum chips inside the mold cavity, preventing waste from damaging the fin surface or affecting the mold closing accuracy, and maintaining the stability of continuous production.

[0019] Preferably, two fixed cylinders are symmetrically installed on the top of the frame. A rubber piston is slidably connected inside the fixed cylinder, and a movable rod is fixedly connected to the outside of the rubber piston. An air inlet pipe and a connecting pipe are connected to the outside of the fixed cylinder in sequence. One-way valves are installed inside the air inlet pipe and the connecting pipe, and the two one-way valves have opposite conduction directions. When the upper mold base moves upward and resets, it pushes the movable rod to move synchronously, causing the rubber piston to slide inside the fixed cylinder and generate air pressure changes, forming an airflow to blow away the waste. This, in conjunction with the cleaning brush, completely removes the waste.

[0020] The above technical solution utilizes the mold reset action to generate airflow to blow away fine debris from the cavity, thereby improving the debris removal effect and reducing the probability of waste residue.

[0021] Preferably, a discharge guide plate is rotatably mounted on the front end of the lower mold base via an electric rotating shaft, and a collection box is fixedly mounted on the front end of the lower mold base below the discharge guide plate. Waste debris swept by the cleaning brush falls into the collection box through the discharge guide plate for centralized collection.

[0022] The above technical solution guides the collected waste materials to a centralized location, preventing them from scattering, keeping the equipment and working environment clean, and reducing the amount of manual cleaning work.

[0023] Preferably, a connecting seat is fixedly installed on the top of the frame, and a trigger switch is installed at the bottom of the connecting seat; when the upper die seat completes the stamping and moves upward to reset to the preset position, the top of the upper die seat contacts and triggers the trigger switch, and the trigger switch controls the electromagnetic adsorption block to be energized and started.

[0024] The above technical solution enables the cleaning action and the mold reset stroke to be linked in a time sequence, realizing automatic triggering and execution of the cleaning process and improving the automation level of the device.

[0025] This invention provides a stamping and forming apparatus for automotive evaporator fins. It has the following beneficial effects: 1. This invention, through the mechanical linkage structure of the upper mold base, drive roller, wedge-shaped drive block and side forming plate, can simultaneously achieve edge correction and shaping in the same process of fin stamping, without the need for additional forming station or independent drive components, effectively simplifying the equipment structure and improving processing efficiency; at the same time, the side forming plate applies uniform force, which can significantly improve the problem of fin edge warping and dimensional deviation, and greatly improve the forming accuracy of evaporator fins.

[0026] 2. This invention relies on a linkage mechanism consisting of a drive rack, gear and bidirectional screw to automatically complete the centering and precise positioning of the fin blank during the mold closing process. The positioning is accurate and does not require manual adjustment, effectively reducing human error and improving the stability of material feeding. With the help of an electromagnetic drive cleaning brush and a pneumatic blowing mechanism, the waste material in the mold cavity is automatically cleaned without manual cleaning, avoiding the accumulation of waste material that may cause damage to the mold or fin crushing. Attached Figure Description

[0027] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the frame structure of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the lower mold base structure of the present invention; Figure 5 This is a schematic diagram of the positioning plate structure of the present invention; Figure 6This is a schematic diagram of the cleaning brush structure of the present invention; Figure 7 This is a cross-sectional view of the fixing base of the present invention; Figure 8 This is a schematic diagram of the bidirectional screw structure of the present invention; Figure 9 for Figure 6 Enlarged view of point B in the middle.

[0028] Among them, 1. frame; 2. hydraulic cylinder; 3. upper mold base; 4. lower mold base; 51. Fixed cylinder; 52. Air inlet pipe; 53. Connecting pipe; 54. Movable rod; 61. Cleaning brush; 62. Mounting slot; 63. Electromagnetic adsorption block; 64. Mounting plate; 71. Connecting column; 72. Drive roller; 73. Fixing base; 74. Side shaping plate; 75. Wedge-shaped drive block; 76. Clearance groove; 77. Return spring; 78. Connecting groove; 81. Drive rack; 82. Drive gear; 83. Positioning plate; 84. Double-acting screw; 85. Threaded block; 9. Discharge guide plate; 10. Connecting seat; 11. Trigger switch; 12. Positioning block. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see the appendix Figure 1 - Appendix Figure 8This invention provides an automotive evaporator fin stamping and forming device. The device uses a frame 1 as its overall support foundation. The frame 1 adopts a rigid and stable structure, maintaining overall stability during continuous stamping operations. This provides a unified spatial reference for the mold opening and closing movements and the installation of various components, preventing deformation under stamping loads and ensuring the stability of fin forming accuracy. A hydraulic cylinder 2 is fixedly installed on the top of the frame 1. The output end of the hydraulic cylinder 2 points vertically downwards and is fixedly connected to the upper mold base 3. The hydraulic cylinder 2 provides stable and controllable mold closing power, enabling the upper mold base 3 to complete uniform downward pressing and smooth upward movements according to a set stroke. This ensures that the stamping pressure is evenly transmitted to the fin blank, improving the consistency of forming quality. A lower mold base 4 is fixedly installed on the inner bottom of the frame 1. The lower mold base 4 and the upper mold base 3 maintain an aligned fit, together forming the main mold structure for fin forming. This also provides a stable installation reference and motion constraint for the forming mechanism, positioning mechanism, and cleaning mechanism, enabling each functional mechanism to operate collaboratively under a unified reference.

[0031] Multiple connecting columns 71 are evenly arranged laterally at the bottom of the upper mold base 3. The connecting columns 71 are rigidly connected to the upper mold base 3 and move synchronously, which can stably transmit the vertical displacement of the upper mold base 3 to the lower actuator, avoiding lag or uneven force distribution during power transmission. The bottom end of the connecting columns 71 is equipped with a rolling fit drive roller 72. The rolling structure can reduce the frictional resistance between the moving pairs, making the transmission process smoother, reducing component wear and improving the service life of the mechanism. Two fixed seats 73 are symmetrically arranged on the inner side of the lower mold base 4. The fixed seats 73 are used to provide support and guidance constraints for the lateral moving parts, restrict the movement direction of the side shaping plate 74 and the slide rod, and ensure that the mechanism moves only along the set path, improving the accuracy of the action. A connecting groove 78 extending laterally is opened inside the fixed seat 73. The side shaping plate 74 is slidably installed in the connecting groove 78. The connecting groove 78 provides sliding constraints and guidance for the side shaping plate 74, so that the side shaping plate 74 does not wobble or shake during the movement, ensuring that the shaping force is uniform and stable. A sliding rod is slidably mounted in the inner through hole of the fixed base 73. One end of the sliding rod is fixed to the wedge-shaped drive block 75, and the other end is fixed to the side forming plate 74, so that the wedge-shaped drive block 75 and the side forming plate 74 form a rigid linkage relationship to ensure synchronous transmission of displacement. The upper surface of the wedge-shaped drive block 75 is provided with an inclined guide surface, which forms a rolling match with the drive roller 72. This can convert the vertical downward movement of the upper die base 3 into the lateral feed movement of the side forming plate 74, thereby completing edge correction while the fin is being stamped, realizing integrated stamping and forming operations, and improving processing efficiency and forming accuracy. A return spring 77 is provided between the fixed base 73 and the side shaping plate 74. The return spring 77 is confined inside the connecting groove 78 and can provide a stable return thrust when there is no external force. When the upper mold base 3 moves upward to reset and the drive roller 72 disengages from the wedge drive block 75, the return spring 77 can push the side shaping plate 74 and the wedge drive block 75 back to the initial position smoothly, ensuring that the shaping mechanism automatically resets and prepares for the next action. An avoidance groove 76 is provided on the inner side of the lower mold base 4. The position of the avoidance groove 76 corresponds completely to the connecting column 71 and is used to provide downward space for the connecting column 71 and the drive roller 72 to avoid structural interference during the mold closing process.

[0032] A drive rack 81 is fixedly installed on the rear side of the upper mold base 3. The drive rack 81 is arranged vertically and rises and falls synchronously with the upper mold base 3, which can directly convert the mold closing power into the input power of the positioning mechanism without the need for an additional drive source, simplifying the overall structure and improving power utilization efficiency. A bidirectional screw 84 is rotatably installed on the inner side of the lower mold base 4 through a bearing. The bidirectional screw 84 adopts a symmetrical thread structure, which allows the two sides of the components to move towards or away from each other at the same speed, ensuring symmetrical and balanced positioning action and avoiding displacement caused by uneven force on the blank. Two threaded blocks 85 are symmetrically connected to the outer side of the bidirectional screw 84, and a positioning plate 83 is fixedly connected to the top of the threaded blocks 85. The drive rack 81 and drive gear 82 are engaged, and the drive gear 82 is coaxially fixed with the bidirectional screw 84. The gear and rack transmission structure ensures accurate power transmission and timely motion response. When the upper die base 3 moves downward, the drive rack 81 drives the drive gear 82 to rotate, which in turn causes the bidirectional screw 84 to rotate synchronously, driving the two positioning plates 83 to move towards each other. This achieves automatic centering and pre-clamping of the fin blank, preventing the blank from shifting or moving during stamping and improving the forming dimensional accuracy. The lower die base 4 is equipped with a positioning block 12 that can move vertically. The outer surface of the positioning block 12 has an inclined surface. The positioning block 12 remains extended during the feeding stage, providing preliminary limiting and rough positioning of the fin blank, reducing feeding deviation and improving feeding efficiency. During the forming stage, it moves downward and retracts, providing clearance space for the side forming plate 74 in conjunction with the inclined surface structure. The inclined surface can provide guidance when in contact, preventing jamming between mechanisms and ensuring that the positioning and forming actions do not interfere with each other.

[0033] Two mounting slots 62 are provided inside the lower mold base 4. The mounting slots 62 are arranged along the edge of the forming cavity, providing installation space for the cleaning mechanism without occupying the forming area. Electromagnetic adsorption blocks 63 are fixedly installed inside the mounting slots 62. The electromagnetic adsorption blocks 63 can achieve stable action switching between energized and de-energized states, providing reliable power for the cleaning mechanism. One set of electromagnetic adsorption blocks 63 is connected to a mounting plate 64 on the outside. The mounting plate 64 is used to support and fix multiple sets of cleaning brushes 61, keeping the cleaning brushes 61 evenly distributed and improving the cleaning coverage and uniformity. Multiple sets of cleaning brushes 61 are evenly installed on the lower surface of the mounting plate 64. The cleaning brushes 61 can move synchronously with the mounting plate 64 to thoroughly clean the surface, grooves and corner areas of the forming cavity of the lower mold base 4, removing residual aluminum shavings and waste materials, avoiding waste material accumulation that may cause mold wear or fin surface damage, and ensuring the stability of continuous production. Two fixed cylinders 51 are symmetrically installed on the top of the frame 1. Rubber pistons are sealed and slidably installed inside the fixed cylinders 51. The rubber pistons and the inner wall of the fixed cylinders 51 form a sealed fit to ensure stable and reliable air pressure changes. A movable rod 54 is fixedly connected to the outside of the rubber piston. The movable rod 54 can convert the upward movement of the upper mold base 3 into the sliding force of the piston. During the upward reset process of the upper mold base 3, it pushes the movable rod 54 to move, causing the rubber piston to slide inside the fixed cylinder 51 and change the internal cavity volume, thus creating a change in air pressure. The fixed cylinder 51 is externally connected to the air inlet pipe 52 and the connecting pipe 53. Both pipes are equipped with one-way valves, and the two one-way valves have opposite conduction directions. This can work in conjunction with the piston movement to form a stable air intake and blowing process, generating a directional airflow to assist in cleaning the molding cavity area. This further blows away the fine debris that is difficult to remove by the cleaning brush 61 from the working surface, improving the overall cleaning effect and chip removal efficiency.

[0034] The front end of the lower die base 4 is equipped with a discharge guide plate 9 via an electric rotating shaft. The discharge guide plate 9 can rotate and adjust within a 180-degree range, allowing it to switch to a suitable discharge angle according to chip removal requirements, expanding the guide opening size and optimizing the flow path, so that waste chips can slide smoothly without stagnation or blockage. A collection box is fixedly installed below the discharge guide plate 9 at the front end of the lower die base 4. The collection box and the discharge guide plate 9 are positioned correspondingly to stably receive the falling waste chips. After cleaning and blowing, the waste chips fall steadily into the collection box along the discharge guide plate 9 under the combined action of gravity and airflow, achieving centralized collection and unified treatment of waste chips, keeping the equipment and work area clean, reducing the frequency and intensity of manual cleaning, and improving production continuity.

[0035] A connecting seat 10 is fixedly installed on the top of the frame 1. The connecting seat 10 is used to fix the trigger switch 11, ensuring that the position of the trigger switch 11 is stable and the trigger height is accurate. The trigger switch 11 is installed at the bottom of the connecting seat 10. The installation height of the trigger switch 11 matches the reset stroke of the upper mold base 3, so that it can be stably triggered when the upper mold base 3 returns to the designated position. When the upper mold base 3 completes the stamping and rises back to the set position, the top of the upper mold base 3 will contact and trigger the trigger switch 11. The trigger switch 11 outputs an electrical signal to control the electromagnetic adsorption block 63 to start, so that the cleaning action and the mold reset action form a time-series linkage, realizing the automatic triggering and automatic execution of mold cavity cleaning. The entire process can be completed stably and reliably without manual operation, improving the automation level of the device.

[0036] Working principle: Before operation, the thin material of the automotive evaporator fins to be processed is placed flat on the forming working surface of the lower mold base 4. The positioning block 12, which can move up and down on the lower mold base 4, is in the extended state. It uses its own position to limit and constrain the edge of the blank, restricting the horizontal movement and displacement of the blank, and ensuring that the blank is basically accurately positioned when it enters the processing area. The hydraulic cylinder 2 at the top of the frame 1 is powered and begins to move downward. Its output end drives the upper mold base 3 to move downward steadily along the guide direction. During the downward movement of the upper mold base 3, the drive rack 81 fixed behind it moves downward synchronously. The drive rack 81 meshes with the drive gear 82. This causes the drive gear 82 to rotate; the drive gear 82 drives the coaxially connected bidirectional screw 84 to rotate, and the two threaded blocks 85 symmetrically arranged on the bidirectional screw 84 move towards each other along the axial direction, thereby driving the top positioning plate 83 to smoothly approach and center and flexibly clamp the fin blank, ensuring that the blank is in the best processing position before stamping; the upper mold base 3 continues to descend and completely closes with the lower mold base 4. Under the action of the mold closing pressure, the fin blank is stamped and formed according to the preset cavity contour, forming the corrugations, heat dissipation teeth and mounting edges required for the evaporator fins, ensuring that the overall shape of the fins meets the assembly and use requirements; During the stamping and mold closing process, multiple sets of connecting columns 71 at the bottom of the upper mold base 3 drive the drive rollers 72 downwards into the corresponding clearance grooves 76 of the lower mold base 4; the drive rollers 72 and the inclined guide surfaces of the wedge-shaped drive block 75 form a rolling engagement, thereby pushing the wedge-shaped drive block 75, the slide rod, and the side forming plate 74 to move along the connecting grooves 78 of the fixed base 73 towards the side of the fin, extruding and correcting the edge of the fin that has just been stamped, eliminating defects such as warping and skewing on the side of the fin. Since the positioning block 12 has been sunk and has an inclined surface, the side forming plate 74 will not collide or get stuck during the movement; After the stamping and shaping processes are completed, the hydraulic cylinder 2 drives the upper die base 3 to rise upwards, and the drive roller 72 gradually disengages from the wedge-shaped drive block 75, and the lateral thrust disappears. At this time, the reset spring 77 in the connecting groove 78 releases its elastic potential energy, pushing the side shaping plate 74, the slide rod and the wedge-shaped drive block 75 to smoothly return to the initial position, avoiding the fin discharge space. After the side shaping plate 74 is reset, the positioning block 12 extends upwards to return to the initial limit height. The upper die base 3 continues to move upwards, and the drive rack 81 moves upwards synchronously, driving the drive gear 82 and the bidirectional screw 84 to rotate in opposite directions. The two threaded blocks 85 drive the positioning plate 83 to separate from each other, releasing the clamping state of the fin, so that the formed fin can be smoothly demolded. When the upper mold base 3 rises to the set reset position, the top of the upper mold base 3 contacts and triggers the trigger switch 11 below the connecting seat 10. The trigger switch 11 outputs an electrical signal to control the electromagnetic adsorption block 63 in the mounting groove 62 of the lower mold base 4 to be energized. The electromagnetic adsorption block 63 generates an adsorption force, which drives the mounting plate 64 to move directionally along the mounting groove 62. The cleaning brushes 61 evenly arranged below the mounting plate 64 move synchronously to thoroughly clean the waste material remaining on the surface and corners of the molding cavity of the lower mold base 4. While the upper mold base 3 continues to rise, the top of the upper mold base 3 pushes the movable rod 54 upward. The movable rod 54 drives the rubber piston to slide in a sealed manner inside the fixed cylinder 51. The change in the volume of the fixed cylinder 51 creates an air pressure difference. With the cooperation of the one-way valves with opposite conduction directions in the air inlet pipe 52 and the connecting pipe 53, the suction and blowing actions are completed, generating a directional airflow to blow away the molding cavity and waste area, further blowing away the fine waste debris cleaned by the cleaning brushes 61 from the working surface. The discharge guide plate 9 at the front end of the lower mold base 4 can rotate 180° under the drive of the electric rotating shaft. During the chip removal stage, the discharge guide plate 9 rotates to the tilted unloading posture, increasing the guiding angle and the unloading opening. The waste chips that are swept and blown down slide quickly and smoothly along the guide surface of the discharge guide plate 9 into the collection box below under the action of gravity and airflow, avoiding the retention or blockage of waste chips, realizing efficient discharge and centralized collection of waste chips, and keeping the equipment and working environment clean.

Claims

1. A stamping and forming device for automotive evaporator fins, characterized in that, The machine includes a frame (1), on which a hydraulic cylinder (2) is fixedly installed. The output end of the hydraulic cylinder (2) faces downward and is fixedly connected to an upper mold base (3). A lower mold base (4) is fixedly installed on the inner bottom of the frame (1) to cooperate with the upper mold base (3) in upper and lower mold closing. Multiple connecting columns (71) are fixedly installed on the bottom of the upper mold base (3). A drive roller (72) is slidably connected to the bottom end of the connecting column (71). Two fixed seats (73) are symmetrically installed on the inner side of the lower mold base (4). A connecting groove (78) is opened inside the fixed seat (73). A side shaping plate (74) is slidably connected to the inside of the connecting groove (78). A sliding rod is slidably connected to the inner through hole of the fixed seat (73). One end of the sliding rod is fixedly connected to a wedge-shaped drive block (75). The inner side of the lower mold base (4) is provided with a clearance groove (76) that matches the number and position of the connecting column (71). When the hydraulic cylinder (2) drives the upper mold base (3) to move downward to close the mold, the connecting column (71) and the drive roller (72) extend downward into the clearance groove (76) simultaneously. The drive roller (72) rolls into contact with the inclined surface of the wedge-shaped drive block (75) and pushes the wedge-shaped drive block (75) to move laterally. Then, the sliding rod drives the side shaping plate (74) to move towards the fin direction, and synchronously shapes and corrects the edge of the stamped automotive evaporator fin.

2. The automotive evaporator fin stamping and forming apparatus according to claim 1, characterized in that, One end of the slide rod is fixedly connected to the outer wall of the side shaping plate (74), and the other end of the slide rod is fixedly connected to the wedge-shaped drive block (75). A reset spring (77) is provided between the fixed seat (73) and the side shaping plate (74). The reset spring (77) is located in the connecting groove (78). When the upper mold base (3) moves upward to reset, the reset spring (77) drives the side shaping plate (74) and the wedge-shaped drive block (75) to automatically return to their original positions.

3. The automotive evaporator fin stamping and forming apparatus according to claim 1, characterized in that, A drive rack (81) is fixedly installed on the rear side of the upper mold base (3), and a bidirectional screw (84) is rotatably connected to the inner side of the lower mold base (4) through a bearing. Two threaded blocks (85) are symmetrically threaded on the outer side of the bidirectional screw (84), and a positioning plate (83) is fixedly connected to the top of the threaded block (85). The drive rack (81) and the drive gear (82) mesh with each other for transmission, and the drive gear (82) and the bidirectional screw (84) are coaxially fixedly connected. When the upper mold base (3) moves downward, the drive rack (81) moves downward and drives the drive gear (82) to rotate, thereby causing the bidirectional screw (84) to rotate synchronously, driving the two positioning plates (83) to move closer to each other, thereby realizing automatic centering and positioning of the fin blank.

4. The automotive evaporator fin stamping and forming apparatus according to claim 3, characterized in that, A positioning block (12) is fixedly provided on the lower die base (4). The positioning block (12) is used to initially limit and roughly position the fin blank, thereby improving the accuracy of fin feeding and stamping positioning.

5. The automotive evaporator fin stamping and forming apparatus according to claim 1, characterized in that, The upper surface of the wedge-shaped drive block (75) is set as an inclined guide surface, and the drive roller (72) rolls along the inclined guide surface.

6. The automotive evaporator fin stamping and forming apparatus according to claim 1, characterized in that, The lower mold base (4) has two mounting slots (62) inside. An electromagnetic adsorption block (63) is fixedly installed in the mounting slot (62). An installation plate (64) is fixedly connected to the outside of one of the electromagnetic adsorption blocks (63). Multiple cleaning brushes (61) are evenly installed on the lower surface of the installation plate (64). When the electromagnetic adsorption block (63) is energized and generates magnetic attraction, it drives the installation plate (64) to move along the mounting slot (62). The cleaning brushes (61) move synchronously with the installation plate (64) to automatically clean the aluminum chips or waste materials remaining in the molding cavity of the lower mold base (4).

7. The automotive evaporator fin stamping and forming apparatus according to claim 1, characterized in that, Two fixed cylinders (51) are symmetrically installed on the top of the frame (1). A rubber piston is slidably connected inside the fixed cylinder (51), and a movable rod (54) is fixedly connected to the outside of the rubber piston. An air inlet pipe (52) and a connecting pipe (53) are connected to the outside of the fixed cylinder (51) in sequence. A one-way valve is installed inside the air inlet pipe (52) and the connecting pipe (53), and the two one-way valves are in opposite directions. When the upper mold base (3) moves upward to reset, it pushes the movable rod (54) to move synchronously, so that the rubber piston slides in the fixed cylinder (51) and generates air pressure change, forming an airflow to blow away the waste. The cleaning brush (61) completely removes the waste.

8. The automotive evaporator fin stamping and forming apparatus according to claim 1, characterized in that, The front end of the lower mold base (4) is equipped with a discharge guide plate (9) which is rotated by an electric shaft. The front end of the lower mold base (4) is fixedly installed below the discharge guide plate (9). The waste scraps cleaned by the cleaning brush (61) fall into the collection box through the discharge guide plate (9) and are collected in a concentrated manner.

9. The automotive evaporator fin stamping and forming apparatus according to claim 6, characterized in that, A connecting seat (10) is fixedly installed on the top of the frame (1), and a trigger switch (11) is installed at the bottom of the connecting seat (10). When the upper mold base (3) completes the stamping and moves upward to reset to the preset position, the top of the upper mold base (3) contacts and triggers the trigger switch (11), and the trigger switch (11) controls the electromagnetic adsorption block (63) to be powered on and started.

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