A type of anti-collision beam bending machine

Abstract

This invention relates to a crash beam bending machine, belonging to the technical field of automotive parts processing equipment. It includes a base, a lower die mounted on the base for placing workpieces, and an upper die that is raised and lowered relative to the lower die for bending the workpieces. It also includes a first threaded rod, a drive motor for rotating the first threaded rod, a clamping mechanism connected to the first threaded rod for fixing the workpiece, and an ejection mechanism connected to the first threaded rod for ejecting the processed workpiece. The clamping mechanism includes a clamping plate slidably mounted on the lower die and an intermediate connecting assembly connected to the first threaded rod for driving the clamping plate to move horizontally. The intermediate connecting assembly includes a lifting plate threadedly connected to the first threaded rod. This invention simplifies the workpiece release process, saving time and labor, and effectively improving overall work efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing equipment technology, and in particular to a crash beam bending machine. Background Technology

[0002] With the rapid development of the automotive industry, safety performance has become one of the most important indicators of modern automobiles, which are commonly used for transportation and mobility. The crash beam is a key component affecting vehicle safety performance. When a car is involved in a collision, the crash beam absorbs impact energy and reduces damage to the vehicle body. Therefore, the crash beam needs to be precisely shaped and bent to better fulfill its protective function.

[0003] An existing anti-collision beam bending machine mainly includes a base, a lower die base, a fixing mechanism for fixing the workpiece to the lower die base, and an upper die base that moves up and down relative to the lower die base. The lower die base is fixedly installed on the top of the base for placing the workpiece to be processed. After the workpiece is placed on the lower die base, it is fixed by the fixing mechanism, and then the upper die base presses and bends the workpiece. After the workpiece is bent, the operator needs to first release the fixing mechanism, then remove the processed workpiece, and finally replace it with a new workpiece. This structure requires manual release of the workpiece after processing, which involves turning multiple bolts and applying considerable force, making the entire release process time-consuming and labor-intensive, significantly reducing work efficiency, and thus requiring improvement. Summary of the Invention

[0004] In order to save time and effort in the entire removal process and to greatly improve work efficiency, this invention provides a crash beam bending machine.

[0005] The anti-collision beam bending machine provided by this invention adopts the following technical solution: A crash beam bending machine includes a base, a lower die seat mounted on the base for placing workpieces, and an upper die seat that is raised and lowered relative to the lower die seat for bending the workpieces. It also includes a first threaded rod, a drive motor for driving the first threaded rod to rotate, a clamping mechanism connected to the first threaded rod for fixing the workpieces, and an ejection mechanism connected to the first threaded rod for ejecting the processed workpieces. The clamping mechanism includes a clamping plate slidably mounted on the lower mold base and an intermediate connecting assembly connected to the first threaded rod and used to drive the clamping plate to move horizontally.

[0006] By adopting the above technical solution, the workpiece to be processed is placed on the lower mold base. Then, the drive motor is started to drive the first threaded rod to rotate. At this time, under the drive of the intermediate connecting component, the clamping plate will move towards the workpiece placed on the lower mold base until it is in close contact with the workpiece, thereby firmly fixing the workpiece on the lower mold base. After processing, the drive motor drives the first threaded rod to rotate in the opposite direction. On the one hand, the intermediate connecting component drives the clamping plate to move away from the workpiece, releasing the clamping of the workpiece. On the other hand, the ejection mechanism connected to the first threaded rod moves synchronously to eject the processed workpiece from the lower mold base, making it easy for the operator to remove the workpiece.

[0007] Optionally, the intermediate connection assembly includes a lifting plate threaded to the first threaded rod, a rotating rod hinged to the lifting plate and the clamping plate respectively, and a first telescopic column mounted on the lifting plate and used for lifting and guiding the lifting plate. The clamping plate has a limiting block that slides horizontally with the lower mold base and limits the clamping plate to only produce horizontal displacement.

[0008] By adopting the above technical solution, when the drive motor drives the first threaded rod to rotate, since the lifting plate is threadedly connected to the first threaded rod and the first telescopic column plays a lifting and guiding role for the lifting plate, the lifting plate will move linearly up and down along the axial direction of the first threaded rod. When the lifting plate rises, it will convert the upward movement of the lifting plate into the horizontal moving force of the clamping plate, driving the clamping plate to move closer to the workpiece until the workpiece is clamped. When the lifting plate falls, the rotating rod swings downward under the drive of the lifting plate, pulling the clamping plate away from the workpiece through the hinge point, thereby loosening the fixation of the workpiece.

[0009] Optionally, the ejection mechanism includes a second threaded rod connected to the first threaded rod and rotatably mounted on the base, an ejection block threaded to the second threaded rod, an ejection plate lifted and mounted on the lower mold base, and an ejection rod. The two ends of the ejection rod are respectively hinged to the ejection block and the ejection plate so that the ejection block drives the ejection plate to rise and fall. The lower mold base has a through ejection hole for the ejector plate to pass through and move up and down. A rubber gasket is provided on the top of the lower mold base around the opening of the ejection hole. The ejector plate is sealed to the inner wall of the ejection hole. The ejector plate has an ejected state and a sunken state. In the ejected state, the ejector plate extends out of the ejector hole; in the sunken state, the ejector plate descends into the ejector hole and forms a cavity with the ejector hole.

[0010] By adopting the above technical solution, during workpiece processing, the ejector plate is in a sunken state, the two ejector blocks move away from each other, and drive the ejector rod to rotate, causing the ejector rod to pull the ejector plate downward along the ejector hole. The ejector plate sinks into the ejector hole and forms a cavity with the inner wall of the ejector hole. The workpiece falls on the top of the lower mold base and abuts against the rubber gasket. At this time, the cavity is sealed. As the ejector plate continues to sink, the pressure in the cavity decreases, and under the action of pressure, a downward suction force is generated, which fixes the workpiece more stably. When the workpiece is processed, the ejector plate is in the ejected state, the two ejector blocks move closer to each other, and drive the ejector rod to rotate, converting the horizontal movement of the ejector blocks into the upward movement of the ejector plate. At this time, the ejector plate extends out of the ejector hole and directly contacts the workpiece, thereby lifting the processed workpiece and separating it from the lower mold base for easy removal of the processed workpiece.

[0011] Optionally, the lower mold base has a guide assembly for guiding the lifting and lowering of the ejector plate. The guide assembly includes a limiting strip fixedly installed on the lower mold base, a second telescopic column disposed between the ejector plate and the limiting strip for guiding the lifting and lowering of the ejector plate, and a T-shaped slider fixedly installed on the ejector block. The T-shaped slider is slidably disposed with respect to the limiting strip.

[0012] By adopting the above technical solution, when the ejector blocks approach or move away from each other, they will drive the ejector plate to rise and fall. When the ejector blocks move, they will be guided horizontally by the T-shaped slider that is fixedly installed on them and slides with the limit strip, reducing the shaking when the ejector blocks move and providing a stable foundation support for the subsequent lifting and lowering of the ejector plate. When the ejector plate is lifted and lowered, the second retractable column guides the lifting and lowering of the ejector plate, restricting the ejector plate from tilting, twisting or other deviations during the lifting and lowering process, and forcing it to move along the axial direction (vertical direction) of the telescopic column.

[0013] Optionally, the base is slidably mounted with an anti-deformation mechanism for supporting the workpiece during bending to prevent deformation. The anti-deformation mechanism includes a third threaded rod connected to the first threaded rod and rotatably mounted on the base, a movable frame threaded to the third threaded rod, an insert block that engages with the workpiece, and a tension spring connecting the movable frame and the insert block. The base has a clearance hole for the movable frame to pass through and slide.

[0014] By adopting the above technical solution, when the first threaded rod rotates, the third threaded rod connected to it rotates synchronously. Since the moving frame is threadedly connected to the third threaded rod, and the clearance hole of the base forms a sliding limit for the moving frame, the insert will slide in the clearance hole along the axial direction of the third threaded rod, thereby adjusting its position to be closer to or further away from the workpiece. The insert that engages with the workpiece will be inserted into the workpiece to form a support. When the workpiece is bent, since the insert and the U-shaped frame are flexibly connected by a tension spring, the insert can bend arbitrarily with the workpiece.

[0015] Optionally, the movable frame is provided with a reset assembly for resetting the insert after it is withdrawn from the workpiece; the reset assembly includes a reset spring and a limiting plate. The reset spring is disposed between the bottom of the insert block and the moving frame to drive the insert block to reset upward; the limiting plate is connected to the moving frame and one end of the limiting plate is engaged with the side of the insert block away from the moving frame; the insert block has an upward through-hole for the limiting plate to be engaged; the limiting plate has a guide plate for guiding the insert block to slide so that the limiting plate and the engaging slot are re-engaged.

[0016] By adopting the above technical solution, when the workpiece is processed and the insert block is withdrawn from the workpiece, the insert block is no longer constrained by the workpiece's compression. At this time, the reset spring located between the bottom of the insert block and the moving frame releases its elastic potential energy, generating an upward thrust that drives the insert block upward, achieving initial reset. When the insert block slides upward to the preset position under the action of the reset spring, the end of the limiting plate away from the U-shaped frame bends to form an insertion part, and a guide plate with a curved guide surface is provided at the bottom of the insertion part. A snap-fit ​​groove is provided through the side of the insert block away from the U-shaped frame, allowing the insertion part to slide into the top of the snap-fit ​​groove and engage with it.

[0017] Optionally, the movable frame includes an L-shaped plate and a U-shaped frame, wherein the L-shaped plate and the U-shaped frame are detachably connected by a locking assembly; the locking assembly includes a locking member telescopically mounted on the U-shaped frame and interlocking with the L-shaped plate, and an auxiliary locking rod telescopically mounted on the locking member and interlocking with the U-shaped frame; a first tension spring is provided between the locking member and the auxiliary locking rod, and the first tension spring drives the auxiliary locking rod to always have the tendency to insert into the U-shaped frame to lock the locking member to the L-shaped plate.

[0018] By adopting the above technical solution, when it is necessary to replace the U-shaped frame, firstly, by pulling the auxiliary locking rod, the auxiliary locking rod is compressed and withdrawn from the U-shaped frame, thus releasing the constraint on the locking component. At this time, by lifting the locking component upward, it is removed from the L-shaped plate, thereby releasing the lock between the L-shaped plate and the U-shaped frame, which facilitates the replacement of the U-shaped frame.

[0019] Optionally, the lower mold base is provided with a buffer mechanism for offsetting the instantaneous pressure generated when the upper mold base and the lower mold base come into contact; the buffer mechanism includes a buffer plate that is lifted and installed on the lower mold base, spring dampers disposed at both ends of the buffer plate, and a compression assembly disposed at the lower middle part of the buffer plate. The compression assembly includes a sliding seat fixedly mounted on the lower mold base, a compression block slidably mounted on the sliding seat, a buffer rod hinged to the compression block and the buffer plate respectively, and a buffer spring disposed between the compression block and the sliding seat. The buffer spring drives the compression block to move so that the buffer plate always has an upward reset tendency.

[0020] By adopting the above technical solution, when the upper die base descends to bend the workpiece on the lower die base, the upper die base first contacts the buffer plate. The instantaneous pressure is transmitted through the buffer plate to the spring dampers at both ends and the compression assembly in the middle. The spring dampers absorb part of the impact force by utilizing the elastic deformation of the springs. At the same time, the dampers consume the impact energy through the internal damping medium, reducing the instantaneous peak pressure and achieving buffering. Meanwhile, the buffer plate moves downward after being subjected to pressure, and the buffer rod pushes the compression block on the sliding seat to slide horizontally along the sliding seat, causing the compression block to squeeze the buffer springs on both sides. When the buffer springs undergo elastic deformation, they further absorb the impact energy, converting the instantaneous pressure in the vertical direction into the spring compression force in the horizontal direction, achieving force dispersion and buffering. This significantly reduces the damage of the instantaneous pressure to the lower and upper die bases, while reducing the deformation of the workpiece caused by the impact, improving processing accuracy and equipment service life.

[0021] Optionally, a guide rod is provided on the sliding seat, the guide rod passes through the compression block, and the buffer spring is sleeved on the guide rod; the compression block and the buffer spring are symmetrically arranged on the guide rod, and the buffer springs on both sides drive the compression block to always tend to move closer to each other.

[0022] By adopting the above technical solution, when the compression block moves, the sliding seat and guide rod provide a precise guiding trajectory for the movement of the compression block. This ensures that the compression block can only slide linearly along the axis of the guide rod, avoiding instability such as offset or tilting when the compression block is under force. The compression block and the buffer spring are symmetrically distributed on the guide rod. This symmetrical design ensures the balance of force on both sides. When an external force is applied to the compression block, the compression block will move outward along the guide rod, thereby compressing the buffer spring sleeved on the guide rod. The buffer spring absorbs the energy generated by the external force through its own elastic deformation, converting the impact of the external force into the elastic potential energy of the spring, thereby achieving the effect of buffering and shock absorption.

[0023] Optionally, a positioning baffle for positioning the workpiece is inserted and installed on one side of the lower mold base. The positioning baffle is connected to the lower mold base through a disassembly assembly. The disassembly assembly includes an L-shaped insert plate that is slidably installed on the lower mold base and inserted and engaged with the positioning baffle, and a U-shaped insert plate that is connected to the L-shaped insert plate and used to lock the L-shaped insert plate to the lower mold base. A second tension spring is connected between the L-shaped insert plate and the lower mold base. The second tension spring drives the L-shaped insert plate to always tend to insert into the positioning baffle. A third tension spring connects the L-shaped insert plate and the U-shaped insert plate, and the third tension spring drives the U-shaped insert plate to always have the tendency to insert into the lower mold base to lock the L-shaped insert plate.

[0024] By adopting the above technical solution, when the positioning baffle needs to be replaced, first pull the U-shaped insert upward to disengage it from the lower mold base, thereby releasing the lock on the L-shaped insert. Then, pull the U-shaped insert horizontally to move the L-shaped insert horizontally, allowing it to be pulled out of the positioning baffle. At this point, the connection between the positioning baffle and the lower mold base is released, and the positioning baffle can be removed for replacement. After the replacement is completed, by releasing the U-shaped insert, the second and third tension springs will automatically return to their initial positions, so that positioning and locking can be quickly achieved when the positioning baffle is installed next time.

[0025] In summary, the present invention has at least one of the following beneficial technical effects: 1. Place the workpiece to be processed on the lower die base, and then start the drive motor to drive the first threaded rod to rotate. At this time, driven by the intermediate connecting component, the clamping plate will move towards the workpiece placed on the lower die base until it is in close contact with the workpiece, thereby firmly fixing the workpiece on the lower die base. After processing, the drive motor drives the first threaded rod to rotate in the opposite direction. On the one hand, the intermediate connecting component drives the clamping plate to move away from the workpiece, releasing the clamping of the workpiece; on the other hand, the ejection mechanism connected to the first threaded rod moves synchronously to eject the processed workpiece from the lower die base, making it easy for the operator to remove the workpiece. 2. During workpiece processing, the ejector plate is in a sunken state, the two ejector blocks move away from each other, and the ejector rod rotates, causing the ejector rod to pull the ejector plate downwards along the ejector hole. The ejector plate sinks into the ejector hole and forms a cavity with the inner wall of the ejector hole. The workpiece falls onto the top of the lower mold base and abuts against the rubber gasket. At this time, the cavity is sealed. As the ejector plate continues to sink, the pressure in the cavity decreases, generating a downward suction force under the pressure, which further stabilizes the workpiece. When the workpiece processing is completed, the ejector plate is in the ejected state, the two ejector blocks move closer to each other, and the ejector rod rotates, converting the horizontal movement of the ejector blocks into the upward movement of the ejector plate. At this time, the ejector plate extends out of the ejector hole and directly contacts the workpiece, thereby lifting the processed workpiece and separating it from the lower mold base for easy removal of the processed workpiece. 3. When the first threaded rod rotates, the third threaded rod connected to it rotates synchronously. Since the moving frame is threadedly connected to the third threaded rod, and the clearance hole of the base forms a sliding limit for the moving frame, the insert will slide in the clearance hole along the axial direction of the third threaded rod to adjust its position closer to or further away from the workpiece. The insert that engages with the workpiece will be inserted into the workpiece to form a support. When the workpiece is bent, since the insert and the U-shaped frame are flexibly connected by a tension spring, the insert can bend arbitrarily with the workpiece. The above three processes can be achieved simply by driving the first threaded rod to rotate through the drive motor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a crash beam bending machine. Figure 2 This is a cross-sectional structural diagram of a crash beam bending machine. Figure 3 This is a schematic diagram of the clamping mechanism; Figure 4 This is a schematic diagram of the ejection mechanism; Figure 5 This is a schematic diagram of the anti-deformation mechanism; Figure 6 yes Figure 5 A magnified view of part A in the middle; Figure 7 yes Figure 5 A magnified view of part B in the middle section; Figure 8 This is a schematic diagram of the buffer mechanism; Figure 9 This is a partial schematic diagram of the disassembled components.

[0027] The parts referred to by the numbers in the above attached figures are as follows: 1. Base; 11. Lower mold base; 12. Upper mold base; 13. Hydraulic cylinder; 14. Support plate; 15. Drive motor; 16. First threaded rod; 17. Positioning baffle; 2. Clamping mechanism; 21. Clamping plate; 22. Limiting block; 23. Intermediate connecting assembly; 231. Lifting plate; 232. Rotating rod; 233. First telescopic column; 3. Ejection mechanism; 31. Second threaded rod; 32. Ejection block; 33. Ejection rod; 34. Ejection plate; 35. First transmission assembly; 351. First small bevel gear; 352. First large bevel gear; 36. Ejection hole; 37. Rubber gasket; 38. Cavity; 39. Guide assembly; 391. Limiting strip; 392. Second telescopic column; 393. T-shaped slider; 394. T-shaped groove; 4. Anti-deformation mechanism; 1. Third threaded rod; 42. Moving frame; 421. L-shaped plate; 422. U-shaped frame; 43. Insert block; 44. Tension spring; 45. Second transmission assembly; 451. Second small bevel gear; 452. Second large bevel gear; 46. Reset assembly; 461. Reset spring; 462. Limiting plate; 463. Snap-fit ​​groove; 464. Guide plate; 47. Locking assembly; 471. Locking element; 472. Auxiliary locking rod; 473. First tension spring; 474. Sliding disc; 48. Clearance hole; 5. Buffer mechanism; 51. Buffer plate; 52. Spring damper; 53. Compression assembly; 531. Sliding seat; 532. Compression block; 533. Buffer rod; 534. Buffer spring; 535. Guide rod; 6. Disassembly assembly; 61. L-shaped insert plate; 62. U-shaped insert plate; 63. Second tension spring; 64. Third tension spring. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] This invention discloses a device for bending anti-collision beams.

[0030] Reference Figure 1 and Figure 2A crash beam bending machine includes a base 1, a lower die base 11, and an upper die base 12. The lower die base 11 is fixedly mounted on the base 1, and a hydraulic cylinder 13 is fixedly mounted on the base 1. The output end of the hydraulic cylinder 13 is fixedly connected to the upper die base 12, used to drive the upper die base 12 and the lower die base 11 to fit together. The lower die base 11 is used to place the workpiece to be bent, and the upper die base 12 is used to bend the workpiece. The crash beam bending machine also includes a clamping mechanism 2, an ejection mechanism 3, an anti-deformation mechanism 4, and a buffer mechanism 5. The clamping mechanism 2 is used to fix the workpiece to be processed on the lower die base 11. The ejection mechanism 3 is used to eject the processed workpiece from the lower die base 11, making it easy for the operator to remove the workpiece. The anti-deformation mechanism is used to support the workpiece during bending to prevent deformation. The buffer mechanism 5 is used to counteract the instantaneous pressure generated when the upper die base 12 and the lower die base 11 come into contact during bending. A support plate 14 is fixedly mounted on the base 1, and a drive motor 15 is fixedly mounted on the support plate 14. The output end of the drive motor 15 is fixedly connected to a first threaded rod 16, which is vertically arranged. The clamping mechanism 2, the ejection mechanism 3, and the anti-deformation mechanism 4 are all connected to the first threaded rod 16 and are synchronously driven by the drive motor 15.

[0031] When the workpiece needs to be processed, the workpiece is first placed on the lower mold base 11 and positioned by the positioning baffle 17. Then, the drive motor 15 is started by the external controller to drive the first threaded rod 16 to rotate. The first threaded rod 16 simultaneously drives the clamping mechanism 2 to clamp the workpiece, drives the ejection mechanism 3 to retract so that the workpiece falls on the lower mold base 11, and drives the anti-deformation mechanism 4 to protect the bending areas at both ends of the workpiece to avoid deformation.

[0032] Reference Figure 2 and Figure 3 The clamping mechanism 2 includes a clamping plate 21, a limiting block 22, and an intermediate connecting assembly 23. The limiting block 22 is fixed on the clamping plate 21. A sliding hole is provided on the lower mold base 11. The clamping plate 21 is slidably installed in the sliding hole, and a part of the clamping plate 21 passes through the sliding hole into the lower mold base 11. The limiting block 22 cooperates with the sliding hole to drive the clamping plate 21 to only produce horizontal displacement.

[0033] The intermediate connecting assembly 23 includes a lifting plate 231, a rotating rod 232, and a first telescopic column 233. The lifting plate 231 is threadedly connected to the first threaded rod 16. The two ends of the rotating rod 232 are respectively hinged to the lifting plate 231 and the clamping plate 21. The bottom end of the first telescopic column 233 is fixedly installed on the top of the support plate 14, and the top end of the first telescopic column 233 is fixedly installed on the bottom of the lifting plate 231 for guiding the lifting plate 231.

[0034] In this embodiment, there are two clamping plates 21 and two rotating rods 232, which are symmetrically located on both sides of the lower mold base 11. The ends of the rotating rods 232 away from the clamping plates 21 are all connected to the same lifting plate 231, so that the clamping plates 21 clamp the workpiece from both sides.

[0035] When the drive motor 15 drives the first threaded rod 16 to rotate, since the lifting plate 231 is threadedly connected to the first threaded rod 16 and the first telescopic column 233 plays a lifting and guiding role for the lifting plate 231, the lifting plate 231 will move linearly up and down along the axial direction of the first threaded rod 16. When the lifting plate 231 rises, it will convert the upward movement of the lifting plate 231 into the horizontal movement of the clamping plate 21, driving the clamping plate 21 to move closer to the workpiece and clamp the workpiece.

[0036] Reference Figure 1 and Figure 4 The ejection mechanism 3 includes a second threaded rod 31, a first transmission assembly 35, an ejection block 32, an ejection plate 34, and an ejection rod 33.

[0037] The second threaded rod 31 is connected to the first threaded rod 16 via the first transmission assembly 35, so that the second threaded rod 31 is driven to rotate by the first threaded rod 16. The first transmission assembly 35 includes a first small bevel gear 351 and a first large bevel gear 352 meshing with the first small bevel gear 351. The first small bevel gear 351 is fixedly mounted on the first threaded rod 16, and the first large bevel gear 352 is fixedly mounted on the second threaded rod 31. There are two second threaded rods 31, which are symmetrically distributed with the first threaded rod 16 as the center. The outer threads of the two second threaded rods 31 have opposite directions of rotation.

[0038] Ejector block 32 is threaded to the second threaded rod 31. Ejector rod 33 is hinged to ejector block 32. The other end of ejector rod 33 is hinged to ejector plate 34. Ejector hole 36 is provided on lower mold base 11. Ejector plate 34 is inserted and fitted into ejector hole 36. Rubber gasket 37 is provided around the opening of ejector hole 36 on the top of lower mold base 11. Ejector plate 34 is sealed to the inner wall of ejector hole 36.

[0039] When the drive motor 15 drives the first threaded rod 16 to rotate, the first threaded rod 16 drives the two second threaded rods 31 to rotate through the first transmission assembly 35, which in turn drives the two ejector blocks 32 that are threadedly connected to the two second threaded rods 31 to start to move closer to each other or further away from each other, so that the ejector plate 34 has an ejection state and a sinking state.

[0040] When machining the workpiece, the workpiece is placed on the lower mold base 11 and abuts against the ejector plate 34. At this time, the ejector plate 34 is in a sunken state, the two ejector blocks 32 move away from each other, and drive the ejector rod 33 to rotate, causing the ejector rod 33 to pull the ejector plate 34 downward along the ejector hole 36. The ejector plate 34 sinks into the ejector hole 36 and forms a cavity 38 with the inner wall of the ejector hole 36. The workpiece falls on the top of the lower mold base 11 and abuts against the rubber gasket 37. At this time, the cavity 38 is sealed. As the ejector plate 34 continues to sink, the pressure in the cavity 38 decreases, and under the action of pressure, a downward suction force is generated, which fixes the workpiece more stably.

[0041] When the workpiece is finished, the ejector plate 34 is in the ejection state, the two ejector blocks 32 approach each other and drive the ejector rod 33 to rotate, converting the horizontal movement of the ejector block 32 into the upward movement of the ejector plate 34. At this time, the ejector plate 34 will extend out of the ejector hole 36 and directly contact the workpiece to lift the finished workpiece, so that it is separated from the lower mold base 11, making it easier to pick up the finished workpiece.

[0042] Furthermore, the lower mold base 11 has a guide assembly 39 for guiding the lifting and lowering of the ejector plate 34. The guide assembly 39 includes a limiting strip 391, a second telescopic column 392, and a T-shaped slider 393. The limiting strip 391 is fixedly installed on the lower mold base 11, and a T-shaped groove 394 is formed on it along its length.

[0043] The second telescopic column 392 is a telescopic rod with an adjustable length. The upper end of the second telescopic column 392 is fixedly installed at the bottom of the ejector plate 34, and its lower end is fixedly installed at the top of the limiting strip 391 to guide the lifting and lowering of the ejector plate 34.

[0044] T-shaped slider 393 is fixedly mounted on ejector block 32, and T-shaped slider 393 is slidably mounted with T-shaped groove 394 to provide guidance for the horizontal movement of ejector block 32.

[0045] Reference Figure 1 and Figure 5 The anti-deformation mechanism 4 includes a third threaded rod 41, a moving frame 42, an insert block 43, and a tension spring 44.

[0046] The third threaded rod 41 is connected to the first threaded rod 16 via the second transmission assembly 45, so that the first threaded rod 16 drives the third threaded rod 41 to rotate. The second transmission assembly 45 includes a second small bevel gear 451 and a second large bevel gear 452 meshing with the second small bevel gear 451. The second small bevel gear 451 is fixedly connected to the first threaded rod 16, and the second large bevel gear 452 is fixedly connected to the third threaded rod 41. There are two third threaded rods 41, which are symmetrically distributed with the first threaded rod 16 as the center. The outer threads of the two third threaded rods 41 have opposite directions of rotation.

[0047] The base 1 has a clearance hole 48, through which the movable frame 42 passes and slides on the base 1. The movable frame 42 includes an L-shaped plate 421 and a U-shaped frame 422, which are detachably connected by a locking assembly 47. The lower end of the L-shaped plate 421 extends into the base 1 and is threadedly connected to the third threaded rod 41.

[0048] The U-shaped frame 422 has an upper plate and a lower plate, forming a telescopic chamber between them. An insert block 43 is telescopically installed in the telescopic chamber, abutting against the upper plate and with a gap between it and the lower plate. A tension spring 44 is installed inside the telescopic chamber, with its two ends connected to the insert block 43 and the U-shaped frame 422, respectively.

[0049] When the first threaded rod 16 rotates, it drives the third threaded rod 41 to rotate synchronously. Since the L-shaped plate 421 is threadedly connected to the third threaded rod 41, and the clearance hole 48 in the base 1 provides sliding limitation for the L-shaped plate 421, the insert 43 slides within the clearance hole 48 along the axial direction of the third threaded rod 41, and the insert 43 inserts into the workpiece to form a support. When the workpiece is bent, because the insert 43 is flexibly connected to the U-shaped frame 422 through a tension spring 44, the insert 43 can bend arbitrarily with the workpiece.

[0050] Reference Figure 5 and Figure 6 The movable frame 42 is provided with a reset assembly 46 for resetting the insert 43 after it is withdrawn from the workpiece. The reset assembly 46 includes a reset spring 461 and a limiting plate 462. The reset spring 461 is disposed in the telescopic chamber, with one end fixed to the lower plate of the U-shaped frame 422 and the other end fixed to the bottom of the insert 43. The reset spring 461 is used to drive the insert 43 to reset upward.

[0051] The limiting plate 462 is fixedly connected to both sides of the U-shaped frame 422. The end of the limiting plate 462 away from the U-shaped frame 422 is bent to form an insertion part, and a guide plate 464 with a curved guide surface is provided at the bottom of the insertion part. The insert block 43 has a snap-fit ​​groove 463 extending upward through the side away from the U-shaped frame 422. The insertion part can slide into the top of the snap-fit ​​groove 463 and engage with it.

[0052] When the insert 43 is removed from the workpiece, the insert 43 is reset under the combined action of the tension spring 44 and the return spring 461. The insert 43 can slide along the curved guide surface of the guide plate 464 and make the insertion part snap into the snap-fit ​​groove 463.

[0053] Reference Figure 5 and Figure 7The locking assembly 47 includes a locking member 471, an auxiliary locking lever 472, and a first tension spring 473. The locking member 471 is T-shaped, with its lower end passing through a U-shaped frame 422 and capable of inserting into an L-shaped plate 421. The auxiliary locking lever 472 is U-shaped, with one end inserted into the U-shaped frame 422 and the other end telescopically mounted on the locking member 471. A sliding disc 474 is slidably mounted inside the locking member 471, and the sliding disc 474 is fixedly connected to the end of the auxiliary locking lever 472. The first tension spring 473 is sleeved on the outside of the auxiliary locking lever 472, with one end fixed to the sliding disc 474 and the other end fixed to the inner wall of the locking member 471, so that the auxiliary locking lever 472 always tends to insert into the U-shaped frame 422 to lock the locking member 471 to the L-shaped plate 421.

[0054] When the U-shaped frame 422 needs to be replaced, first pull the auxiliary locking rod 472 to compress the first tension spring 473 and exit the U-shaped frame 422, releasing the constraint on the locking member 471. Then, lift the locking member 471 upward to remove it from the L-shaped plate 421, thereby releasing the lock between the L-shaped plate 421 and the U-shaped frame 422.

[0055] Reference Figure 1 and Figure 8 A buffer mechanism 5 is disposed between the lower mold base 11 and the upper mold base 12 to offset the instantaneous pressure generated when the upper mold base 12 and the lower mold base 11 come into contact. The buffer mechanism 5 includes a buffer plate 51, a spring damper 52, and a compression assembly 53. The buffer plate 51 is vertically oriented relative to the lower mold base 11. There are two spring dampers 52, whose bottoms are fixedly mounted on the lower mold base 11, and whose tops are fixedly connected to both ends of the buffer plate 51. The compression assembly 53 is mounted on the lower mold base 11 and is connected to the middle position of the buffer plate 51. The spring damper 52 is used to offset the impact at both ends of the buffer plate 51, and the compression assembly 53 is used to offset the impact at the middle position of the buffer plate 51.

[0056] The spring damper 52 consists of a telescopic rod and a spring sleeved on its outer side.

[0057] The compression assembly 53 includes a sliding seat 531, a compression block 532, a buffer rod 533, and a buffer spring 534. The sliding seat 531 is fixedly mounted on the lower mold base 11, and a guide rod 535 is fixedly mounted on the sliding seat 531. The compression block 532 is slidably mounted on the sliding seat 531 and movably sleeved on the guide rod 535, allowing it to move horizontally along the guide rod 535. There are two compression blocks 532, symmetrically arranged on the guide rod 535. The buffer spring 534 is disposed between each compression block 532 and the sliding seat 531, and sleeved on the guide rod 535, driving the compression blocks 532 to move closer or further apart.

[0058] One end of the buffer rod 533 is hinged to the compression block 532, and the other end of the buffer rod 533 is hinged to the buffer plate 51. When the compression blocks 532 move closer or further apart, the buffer plate 51 can rise and fall under the action of the buffer rod 533.

[0059] When the upper die holder 12 descends and bends the workpiece on the lower die holder 11, the upper die holder 12 first contacts the buffer plate 51. The instantaneous pressure is transmitted through the buffer plate 51 to the spring dampers 52 at both ends. The spring dampers 52 absorb part of the impact force by utilizing the elastic deformation of the springs. At the same time, the dampers consume the impact energy through the internal damping medium, reducing the instantaneous peak pressure and achieving buffering. Simultaneously, the buffer plate 51 moves downward after being subjected to pressure, and the buffer rod 533 pushes the compression block 532 on the sliding seat 531 to slide horizontally along the sliding seat 531, causing the compression block 532 to compress the buffer springs 534 on both sides. When the buffer springs 534 undergo elastic deformation, they further absorb the impact energy, converting the instantaneous pressure in the vertical direction into the spring compression force in the horizontal direction, achieving force dispersion and buffering. This significantly reduces the damage of the instantaneous pressure to the lower die holder 11 and the upper die holder 12, while reducing the deformation of the workpiece caused by the impact, improving processing accuracy and equipment service life.

[0060] Reference Figure 8 and Figure 9 A positioning baffle 17 for positioning the workpiece is inserted and fitted onto the lower mold base 11. The positioning baffle 17 and the lower mold base 11 are connected by a disassembly assembly 6. When the workpiece is placed on the lower mold base 11, one end of the workpiece is first brought into contact with the positioning baffle 17. When the two are in contact, the workpiece is positioned.

[0061] The disassembly assembly 6 includes an L-shaped insert plate 61, a U-shaped insert plate 62, a second tension spring 63, and a third tension spring 64. The L-shaped insert plate 61 is slidably connected to the lower mold base 11, and one end is inserted into the positioning baffle 17. The second tension spring 63 is disposed between the L-shaped insert plate 61 and the lower mold base 11, and the second tension spring 63 drives the L-shaped insert plate 61 to always tend to insert into the positioning baffle 17.

[0062] The U-shaped insert plate 62 and the L-shaped insert plate 61 are connected by a third tension spring 64. The lower end of the U-shaped insert plate 62 can be inserted into the lower mold base 11 to limit the movement of the L-shaped insert plate 61 and lock it. The third tension spring 64 drives the U-shaped insert plate 62 to always have the tendency to insert into the lower mold base 11 to lock the L-shaped insert plate 61.

[0063] When the positioning baffle 17 needs to be replaced, first pull the U-shaped insert 62 upward to disengage it from the lower mold base 11, thereby releasing the lock on the L-shaped insert 61. Then, pull the U-shaped insert 62 horizontally to move the L-shaped insert 61 horizontally, causing it to be pulled out of the positioning baffle 17. At this time, the connection between the positioning baffle 17 and the lower mold base 11 is released, and the positioning baffle 17 can be removed for replacement. After the replacement is completed, by releasing the U-shaped insert 62, the second tension spring 63 and the third tension spring 64 will automatically return to their initial positions, so that positioning and locking can be quickly achieved when the positioning baffle 17 is installed next time.

[0064] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A crash beam bending machine, comprising a base (1), a lower die (11) mounted on the base (1) for placing workpieces, and an upper die (12) that is raised and lowered relative to the lower die (11) for bending workpieces, characterized in that: It also includes a first threaded rod (16), a drive motor (15) for driving the first threaded rod (16) to rotate, a clamping mechanism (2) connected to the first threaded rod (16) for fixing the workpiece, and an ejection mechanism (3) connected to the first threaded rod (16) for ejecting the processed workpiece. The clamping mechanism (2) includes a clamping plate (21) slidably mounted on the lower mold base (11) and an intermediate connecting assembly (23) connected to the first threaded rod (16) and used to drive the clamping plate (21) to move horizontally. The intermediate connecting assembly (23) includes a lifting plate (231) threaded to the first threaded rod (16), a rotating rod (232) hinged to the lifting plate (231) and the clamping plate (21) respectively, and a first telescopic column (233) installed on the lifting plate (231) and used for lifting and guiding the lifting plate (231). The clamping plate (21) has a limiting block (22) that slides horizontally with the lower mold base (11) and is used to limit the clamping plate (21) to only produce horizontal displacement. The ejection mechanism (3) includes a second threaded rod (31) connected to the first threaded rod (16) and rotatably mounted on the base (1), an ejection block (32) threaded to the second threaded rod (31), an ejection plate (34) mounted on the lower mold base (11) and an ejection rod (33). The two ends of the ejection rod (33) are respectively hinged to the ejection block (32) and the ejection plate (34) so ​​that the ejection block (32) can drive the ejection plate (34) to move up and down. The lower mold base (11) has an ejection hole (36) through which the ejector plate (34) passes and moves up and down. A rubber gasket (37) is provided on the top of the lower mold base (11) around the opening of the ejection hole (36). The ejector plate (34) is sealed to the inner wall of the ejection hole (36). The ejector plate (34) has an ejected state and a sunken state. In the ejected state, the ejector plate (34) extends out of the ejector hole (36); in the sunken state, the ejector plate (34) descends into the ejector hole (36) and forms a cavity (38) with the ejector hole (36). The base (1) is slidably mounted with an anti-deformation mechanism (4) for supporting the workpiece when it is bent to prevent deformation of the workpiece. The anti-deformation mechanism (4) includes a third threaded rod (41) connected to the first threaded rod (16) and rotatably mounted on the base (1), a movable frame (42) threaded to the third threaded rod (41), an insert block (43) that is inserted into the workpiece, and a tension spring (44) connecting the movable frame (42) and the insert block (43). The base (1) is provided with a clearance hole (48) for the movable frame (42) to pass through and slide.

2. The anti-collision beam bending machine according to claim 1, characterized in that: The lower mold base (11) has a guide assembly (39) for guiding the lifting and lowering of the ejector plate (34). The guide assembly (39) includes a limiting strip (391) fixedly installed on the lower mold base (11), a second telescopic column (392) disposed between the ejector plate (34) and the limiting strip (391) for guiding the lifting and lowering of the ejector plate (34), and a T-shaped slider (393) fixedly installed on the ejector block (32). The T-shaped slider (393) is slidably disposed with respect to the limiting strip (391).

3. The anti-collision beam bending machine according to claim 1, characterized in that: The movable frame (42) is provided with a reset assembly (46) for resetting the insert (43) after it is withdrawn from the workpiece; the reset assembly (46) includes a reset spring (461) and a limiting plate (462). The reset spring (461) is disposed between the bottom of the insert (43) and the moving frame (42) to drive the insert (43) to reset upward; the limiting plate (462) is connected to the moving frame (42) and one end of the limiting plate (462) is engaged with the side of the insert (43) away from the moving frame (42); the insert (43) has an upward through-hole for the limiting plate (462) to be engaged; the limiting plate (462) has a guide plate (464) for guiding the insert (43) to slide so that the limiting plate (462) and the locking groove (463) are re-engaged.

4. The anti-collision beam bending machine according to claim 1, characterized in that: The movable frame (42) includes an L-shaped plate (421) and a U-shaped frame (422). The L-shaped plate (421) and the U-shaped frame (422) are detachably connected by a locking assembly (47). The locking assembly (47) includes a locking member (471) that is telescopically installed on the U-shaped frame (422) and inserted into the L-shaped plate (421), and an auxiliary locking rod (472) that is telescopically installed on the locking member (471) and inserted into the U-shaped frame (422). A first tension spring (473) is provided between the locking member (471) and the auxiliary locking rod (472). The first tension spring (473) drives the auxiliary locking rod (472) to always have the tendency to insert into the U-shaped frame (422) to lock the locking member (471) to the L-shaped plate (421).

5. The anti-collision beam bending machine according to claim 1, characterized in that: The lower mold base (11) is provided with a buffer mechanism (5) for offsetting the instantaneous pressure generated when the upper mold base (12) and the lower mold base (11) come into contact; the buffer mechanism (5) includes a buffer plate (51) that is lifted and installed on the lower mold base (11), spring dampers (52) provided at both ends of the buffer plate (51), and a compression assembly (53) provided at the lower end of the middle part of the buffer plate (51); The compression assembly (53) includes a sliding seat (531) fixedly mounted on the lower mold base (11), a compression block (532) slidably mounted on the sliding seat (531), a buffer rod (533) hinged to the compression block (532) and the buffer plate (51) respectively, and a buffer spring (534) disposed between the compression block (532) and the sliding seat (531). The buffer spring (534) drives the compression block (532) to move so that the buffer plate (51) always has an upward reset tendency.

6. The anti-collision beam bending machine according to claim 5, characterized in that: A guide rod (535) is provided on the sliding seat (531), the guide rod (535) passes through the compression block (532), and the buffer spring (534) is sleeved on the guide rod (535); the compression block (532) and the buffer spring (534) are symmetrically arranged on the guide rod (535), and the buffer springs (534) on both sides drive the compression block (532) to always have a tendency to move closer to each other.

7. The anti-collision beam bending machine according to claim 1, characterized in that: A positioning baffle (17) for positioning the workpiece is inserted and installed on one side of the lower mold base (11). The positioning baffle (17) and the lower mold base (11) are connected by a disassembly assembly (6). The disassembly assembly (6) includes an L-shaped insert (61) that is slidably installed on the lower mold base (11) and inserted and engaged with the positioning baffle (17), and a U-shaped insert (62) that is connected to the L-shaped insert (61) and used to lock the L-shaped insert (61) to the lower mold base (11). A second tension spring (63) is connected between the L-shaped insert plate (61) and the lower mold base (11). The second tension spring (63) drives the L-shaped insert plate (61) to always have the tendency to insert into the positioning baffle (17). A third tension spring (64) is connected between the L-shaped insert (61) and the U-shaped insert (62). The third tension spring (64) drives the U-shaped insert (62) to always have the tendency to insert into the lower mold base (11) to lock the L-shaped insert (61).

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