High-speed four-side punching special machine for energy absorption box

Abstract

The invention discloses a high-speed four-side punching special machine for an energy absorption box, and relates to the technical field of punching machines, the high-speed four-side punching special machine for the energy absorption box comprises a workbench and further comprises an outer pipe, the outer pipe is fixed to the top of the workbench, an inner pipe is fixed in the outer pipe, an outer through hole is formed in the side wall of the outer pipe in a penetrating mode, and a grinding ring matched with the outer through hole is arranged on the side wall of the inner pipe in a penetrating mode; the outer pipe and the inner pipe are matched for fixing the energy absorption box; the push plate slides on the outer side of the outer pipe; the punching device has the beneficial effects that the polishing plate is arranged on the side edge of the punching head, the polishing ring is arranged on the side wall of the inner pipe, in the process that the punching head is reset after punching is completed, the motor can drive the punching head to rotate, the punching head rotates during resetting, burrs on the inner side of a punched hole are polished through the polishing plate, and when a matching plate is clamped into the polishing ring, the punching head is driven by the motor to rotate; the punching head can drive the grinding ring to rotate, the grinding ring can grind turned edges of punched holes, the punching and grinding steps are combined into a whole, the production steps are simplified, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of drilling machine technology, and in particular to a high-speed four-sided drilling machine for energy-absorbing boxes. Background Technology

[0002] In the fields of automobiles, rail transportation and construction machinery, energy-absorbing boxes are key collision energy-absorbing structural components. Their manufacturing precision and surface quality directly affect the safety performance and assembly reliability of the whole vehicle. Traditional energy-absorbing boxes are usually made of high-strength steel plates by stamping and forming, and multi-faceted machining is performed on their side walls to meet the assembly requirements of connecting with other structural components by bolts.

[0003] Currently, the punching process for energy-absorbing boxes mostly uses specialized punching equipment to complete four-sided or multi-sided punching operations. However, during high-speed punching, due to factors such as material plastic deformation and die clearance, burrs and flanging are easily generated at the edge of the hole. Although these defects are minor, they pose significant risks to subsequent assembly and anti-corrosion treatment. On the one hand, flanging makes it difficult for bolts to pass smoothly into the mounting hole, affecting assembly efficiency and even causing assembly misalignment. On the other hand, burrs will disrupt the continuity of subsequent coating or electrophoretic layer, forming weak points in anti-corrosion, accelerating local corrosion, and reducing the service life of parts.

[0004] In existing technologies, punching, deburring, and de-flaring processes are usually carried out in separate steps. That is, punching is first completed by a special punching machine, and then post-processing is done by manual grinding or additional independent deburring equipment. This method not only increases equipment investment and production line floor space, but also leads to longer cycle time and reduced efficiency due to inter-process transfer. In addition, manual grinding has problems such as poor consistency and unstable quality, which makes it difficult to meet the needs of automated, high-cycle production lines.

[0005] Therefore, it is necessary to invent a special machine for high-speed four-sided drilling of energy-absorbing boxes to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a high-speed four-sided drilling machine for energy-absorbing boxes to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-speed four-sided punching machine for energy-absorbing boxes, comprising a worktable and an outer tube fixed to the top of the worktable, an inner tube fixed inside the outer tube, an outer perforation through the inner tube's side wall, and a grinding ring matching the outer perforation through the inner tube's side wall. The outer tube and the inner tube cooperate to fix the energy-absorbing box. A push plate slides on the outside of the outer tube and is fixed to the telescopic rod of a hydraulic cylinder on the worktable. A punch head is rotatably mounted on the inner side of the push plate and slides inside the outer perforation. A grinding plate and a matching plate are telescopically mounted on the side of the punch head. A motor is fixed on the outside of the push plate and is connected to the punch head for driving. The grinding plate is used to grind the inner side of the punch hole, and the matching plate is used to drive the grinding ring to rotate and grind the flange of the punch hole.

[0008] Preferably, it also includes a base, which is fixed to the top of the workbench, and the bottom ends of the outer tube and the inner tube are both fixed to its top. Both the workbench and the base are provided with through holes that match the bottom ends of the inner tube; a top plate, which is fixed above the base by a support column, and the outer tube is provided through the top plate, with the top end of the outer tube flush with the upper surface of the top plate; a pad, which is fixed to the top of the workbench, and the hydraulic cylinder is fixed to its top.

[0009] Preferably, it also includes an extension cavity, which has two vertically opened at two opposite corners on the inner side of the outer tube. A connecting rod 1 slides inside the extension cavity. The bottom ends of the two connecting rods 1 are fixedly connected by a lower ring. The lower ring slides between the outer tube and the inner tube. The top ends of the two connecting rods 1 are fixedly connected by an upper ring. The upper ring is mounted on the top of the outer tube. A lifting ring is fixed to the top of the upper ring.

[0010] Preferably, it also includes a turntable that rotates inside the push plate, with an internal gear fixed coaxially at its outer end. The internal gear is connected to the drive gear on the motor output shaft via a toothed belt inside the push plate and connected by a key. A second connecting rod has one end fixed to the inner end of the turntable and the other end fixedly connected to the outer end of the punch head. A pressure sensor is located at the end of the turntable away from the punch head and is connected to the motor via an external controller.

[0011] Preferably, it also includes a slide rod that slides inside the punch head, with its outer end extending out of the punch head and fixed with a spring seat, and a spring seat between the spring seat and the punch head; and an mounting tube that is fixed to the side of the outer tube, with a hook plate slidably mounted inside the tube by a tension spring, the hook plate being L-shaped, and the section of the hook plate away from the mounting tube sliding between the punch head and the push plate.

[0012] Preferably, it also includes an inner shrinkage cavity 1, which is opened on the side of the stamping head, and a grinding plate is sealed and slidably inside it. A compensation cavity is opened inside the grinding plate, and a piston plate 1 is sealed and slidably inside the compensation cavity by a spring 2. A limit plate is fixed on the side of the compensation cavity near the outside, and a pressure stabilizing hole is opened through the outside of the grinding plate. A piston cavity is opened inside the stamping head and located on the side of the slide rod. One end of the piston cavity near the spring seat is connected to the inner shrinkage cavity 1. A piston plate 2 is fixed on the side of the slide rod and is sealed and slidably inside the piston cavity.

[0013] Preferably, it also includes a retaining ring, which is coaxially fixed to the outer surface of the grinding ring. The grinding ring rotates on the side wall of the inner tube through the retaining ring. The inner end of the inner side of the grinding ring is provided with a matching groove for a matching plate. The second inner shrinkage cavity is opened on the outside of the punch head and is located on the side of the inner shrinkage cavity away from the spring seat. A pressing plate slides inside the cavity through the second tension spring. The matching plate is fixed to the outside of the pressing plate. The sliding cavity is opened inside the punch head and is located on the side of the slide rod. Its outer side is connected to the second inner shrinkage cavity. A cone slides inside the cavity. One end of the cone is fixedly connected to the inner end of the slide rod. The inclined surface of the cone abuts against the pressing plate.

[0014] Preferably, it also includes a pallet, which is fixed to the top of the workbench by two columns, and a slide block is slidable between the two columns. A second hydraulic cylinder is fixed to the top of the pallet, and the telescopic rod of the second hydraulic cylinder passes through the pallet and is fixedly connected to the slide block. An extension plate is fixed to one side of the slide block, and a first cylinder is fixed to the top of the extension plate. The telescopic rod of the first cylinder passes through the extension plate, extends to the bottom of the extension plate, and is fixed to a pressure plate. The pressure plate is located directly above the outer tube.

[0015] Preferably, it also includes side plates, which are provided with two and symmetrically fixed on both sides of the extension plate. A second cylinder is fixed on the outer side of the side plate, and the telescopic rod of the second cylinder passes through the side plate and is fixed with a locking block that matches the lifting ring.

[0016] The beneficial effects and advantages of this invention are as follows: 1. This invention combines punching and grinding into one step by setting a grinding plate on the side of the punching head and a grinding ring on the side wall of the inner tube. During the resetting process after punching, the motor drives the punching head to rotate, and the grinding plate grinds the burrs on the inner side of the punched hole. When the matching plate is inserted into the grinding ring, the punching head drives the grinding ring to rotate, and the grinding ring can grind the flange of the punched hole. This device combines the punching and grinding steps into one, which simplifies the production process and greatly improves production efficiency.

[0017] 2. This invention, by setting up a grinding plate, a second piston plate, a sliding rod, and a hook plate, allows the hook plate to press down on the sliding rod when not punching, preventing the second piston plate from sliding. During punching, although the second piston plate slides, the grinding plate is restricted from sliding outward by the external perforation. At this time, the air pressure generated by the sliding of the second piston plate pushes the first piston plate to slide and be stored in the compensation cavity. When the punching head rotates, the second spring pushes the grinding plate against the inside of the punch hole. As the punching head rotates, the burrs on the inside of the punch hole are ground. This arrangement allows the grinding plate to stably abut against the inside of the punch hole without obstructing the sliding of the punching head, ensuring the grinding effect.

[0018] 3. By setting a matching groove, a matching plate, and a cone head, when the stamping head retracts, the outer sliding of the slide rod will push the matching plate out through the cone head and the extrusion plate, so that the matching plate is stuck into the matching groove. Then, the stamping head drives the grinding ring to rotate and grind the flange. When the matching plate is about to move out of the matching groove, the extrusion plate and the matching plate can be pushed into the inner shrinkage cavity by the extrusion of the inclined surface on the matching plate. This setting enables the device to not only grind the flange, but also prevent the matching plate from affecting the reset of the stamping head. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the isometric structure of the present invention; Figure 2 This is a schematic diagram of the outer tube structure of the present invention; Figure 3 This is a schematic diagram of the inner tube structure of the present invention; Figure 4 This is a schematic diagram of the lower ring structure of the present invention; Figure 5 This is a schematic cross-sectional view of the grinding ring structure of the present invention; Figure 6 This is a schematic diagram of the stamping head structure of the present invention; Figure 7 This is a schematic cross-sectional view of the stamping head of the present invention; Figure 8 This is a schematic diagram of the slide bar structure of the present invention; Figure 9 This is a schematic diagram of the matching plate structure of the present invention; Figure 10 This is a cross-sectional view of the mounting pipe structure of the present invention.

[0020] In the picture: 1. Workbench; 2. Outer tube; 21. External perforation; 22. Extension cavity; 221. Connecting rod one; 222. Lower ring; 223. Upper ring; 224. Lifting ring; 3. Inner tube; 31. Grinding ring; 32. Snap ring; 33. Matching groove; 4. Push plate; 41. Hydraulic cylinder one; 411. Pad plate; 5. Punching head; 51. Grinding plate; 511. Inner contraction cavity one; 512. Compensation cavity; 513. Spring two; 514. Piston plate one; 515. Limiting plate; 516. Pressure stabilizing hole; 517. Piston cavity; 518. Piston plate two; 52. Matching plate; 521. Inner contraction cavity two; 522. Tension spring two; 523. Extrusion plate; 524. Sliding cavity; 525. Cone head; 53. Motor; 54. Turntable; 541. Internal gear; 542. Connecting rod two; 543. Pressure sensor; 55. Slide rod; 551. Spring seat; 552. Spring one; 56. Mounting tube; 561. Tension spring one; 562. Hook plate; 6. Base; 61. Top plate; 62. Support column; 7. Support plate; 71. Column; 72. Slide; 73. Hydraulic cylinder two; 74. Extension plate; 75. Cylinder one; 76. Side plate; 77. Cylinder two. Detailed Implementation

[0021] The technical solutions of 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.

[0022] This invention provides, for example Figures 1 to 10 The diagram shows a high-speed four-sided drilling machine for energy-absorbing boxes, comprising a worktable 1 and an outer tube 2 fixed to the top of the worktable 1. An inner tube 3 is fixed inside the outer tube 2, with an external through-hole 21 penetrating its side wall. A grinding ring 31 matching the external through-hole 21 is penetrating the side wall of the inner tube 3. The outer tube 2 and inner tube 3 cooperate to fix the energy-absorbing box. A push plate 4 slides outside the outer tube 2, and its outer side is fixed to the telescopic rod of a hydraulic cylinder 41 on the worktable 1. A punch head 5 is rotatably mounted on its inner side, sliding within the external through-hole 21. A grinding plate 51 and a matching plate 52 are telescopically mounted on the side of the punch head 5. A motor 53 is fixed to the outer side of the push plate 4, and the motor 53 is driven by the punch head 5. The grinding plate 51 is used to grind the inner side of the punch hole, and the matching plate 52 is used to drive the grinding ring 31 to rotate and grind the flange of the punch hole. By setting the grinding plate 51 on the side of the punching head 5 and setting the grinding ring 31 on the side wall of the inner tube 3, the motor 53 will drive the punching head 5 to rotate during the resetting process after punching. The grinding plate 51 grinds the burrs on the inner side of the punch hole. When the matching plate 52 is locked in the grinding ring 31, the punching head 5 will drive the grinding ring 31 to rotate. The grinding ring 31 can grind the flange of the punch hole. This device combines the punching and grinding steps into one, which simplifies the production steps and greatly improves the production efficiency.

[0023] Specifically, it also includes a base 6, which is fixed to the top of the workbench 1, and the bottom ends of the outer tube 2 and the inner tube 3 are both fixed to its top. Both the workbench 1 and the base 6 have through holes that match the bottom ends of the inner tube 3. A top plate 61 is fixed above the base 6 by a support column 62. The outer tube 2 is installed through the top plate 61, and the top end of the outer tube 2 is flush with the upper surface of the top plate 61. A pad 411 is fixed to the top of the workbench 1, and a hydraulic cylinder 41 is fixed to its top.

[0024] Specifically, it also includes an extension cavity 22, which has two vertically opened at two opposite corners inside the outer tube 2. Connecting rods 221 slide inside the cavity. The bottom ends of the two connecting rods 221 are fixedly connected by a lower ring 222, which slides between the outer tube 2 and the inner tube 3. The top ends of the two connecting rods 221 are fixedly connected by an upper ring 223, which is mounted on the top of the outer tube 2. A lifting ring 224 is fixed to the top of the upper ring 223. With this arrangement, the energy-absorbing box between the outer tube 2 and the inner tube 3 can be lifted out.

[0025] Specifically, it also includes a turntable 54, which rotates inside the push plate 4, with an internal gear 541 coaxially fixed at its outer end. The internal gear 541 is connected to the drive gear on the output shaft of the motor 53 via a toothed belt inside the push plate 4 and connected by a key. A connecting rod 542 has one end fixed to the inner end of the turntable 54 and the other end fixedly connected to the outer end of the punch head 5. A pressure sensor 543 is located at the end of the turntable 54 away from the punch head 5 and is connected to the motor 53 via an external controller. When the hydraulic cylinder 41 pushes the punch head 5 to punch the energy-absorbing box through the push plate 4, the pressure sensor 543 senses the pressure and transmits the signal to the external controller. Upon receiving the signal, the external controller does not control the motor 53 to run. When the punching is completed and the punched material falls through the inner tube 3, the pressure sensor 543 senses the pressure reduction and transmits the signal to the external controller. The external controller controls the motor 53 to rotate and simultaneously controls the telescopic rod of the hydraulic cylinder 41 to retract.

[0026] Specifically, it also includes a slide rod 55, which slides inside the punch head 5, with its outer end extending out of the punch head 5 and fixed with a spring seat 551. A spring 552 is provided between the spring seat 551 and the punch head 5; an mounting tube 56, which is fixed to the side of the outer tube 2, and a hook plate 562 is slidably mounted inside it via a tension spring 561. The hook plate 562 is L-shaped, and the section of the hook plate 562 away from the mounting tube 56 slides between the punch head 5 and the push plate 4; when punching... When the inner end of the head 5 does not extend between the outer tube 2 and the inner tube 3, the hook plate 562 presses the spring seat 551 under the tension of the tension spring 561. When the inner end of the punch head 5 is flush with the inner end of the outer perforation 21, the corner of the hook plate 562 is blocked by the mounting tube 56 and cannot be pulled by the tension spring 561. A part of the grinding plate 51 is located inside the outer perforation 21. If the punch head 5 continues to slide inward at this time, the slide rod 55 slides outward under the action of the spring 552.

[0027] Specifically, it also includes an inner shrinkage cavity 511, which is located on the side of the stamping head 5. A grinding plate 51 slides and seals inside the inner shrinkage cavity 511. A compensation cavity 512 is provided inside the grinding plate 511. A piston plate 514 slides and seals inside the compensation cavity 512 via a spring 513. A limit plate 515 is fixed to the outer side of the compensation cavity 512. A pressure stabilizing hole 516 is provided through the outer side of the grinding plate 51. A piston cavity 517 is located inside the stamping head 5 and on the side of the slide rod 55. One end of the piston cavity 517 near the spring seat 551 is connected to the inner shrinkage cavity 511. A piston plate 518 is fixed to the side of the slide rod 55 and slides and seals inside the piston cavity 517. A slot for matching the piston plate 518 is provided on the slide rod 55. When installed, the piston plate 518 can be engaged through the connection between the piston cavity 517 and the inner shrinkage cavity 511. In the groove, when the spring seat 551 is pressed by the hook plate 562, the piston plate 518 is located at the end of the piston chamber 517 away from the spring seat 551. By setting the grinding plate 51, the piston plate 518, the slide rod 55 and the hook plate 562, when not punching, the hook plate 562 presses the slide rod 55, and the piston plate 518 does not slide. When punching, although the piston plate 518 slides, the grinding plate 51 is restricted by the external through hole 21 and cannot slide outward. At this time, the air pressure generated by the sliding of the piston plate 518 pushes the piston plate 514 to slide and be stored in the compensation chamber 512. When the punching head 5 rotates, the spring 513 pushes the grinding plate 51 to the inside of the punch hole. As the punching head 5 rotates, the burrs on the inside of the punch hole are ground. This setting allows the grinding plate 51 to be stably pressed against the inside of the punch hole without blocking the sliding of the punching head 5, thus ensuring the grinding effect.

[0028] Specifically, it also includes a retaining ring 32, which is coaxially fixed to the outer surface of the grinding ring 31. The grinding ring 31 rotates on the side wall of the inner tube 3 through the retaining ring 32. The inner end of the inner side of the grinding ring 31 is provided with a matching groove 33 for the matching plate 52; an inner shrinkage cavity 521, which is opened on the outside of the punch head 5 and located on the side of the inner shrinkage cavity 511 away from the spring seat 551. Inside the inner shrinkage cavity 521, a pressing plate 523 slides through a tension spring 522. The matching plate 52 is fixed to the outside of the pressing plate 523. When the pressing plate 523 is not pressed, the matching plate 52 is completely located in the inner shrinkage cavity 521; a sliding cavity 524, which is opened inside the punch head 5 and located on the side of the slide rod 55. Its outer side is connected to the inner shrinkage cavity 521. Inside the sliding cavity 524, a cone head 525 slides. One end of the cone head 525 is fixedly connected to the inner end of the slide rod 55. Next, the inclined surface of the cone 525 abuts against the extrusion plate 523. During installation, the cone 525 can first be inserted into the sliding cavity 524 from the inner shrinkage cavity 2 521, and then it can be snapped or welded to one end of the slide rod 55. By setting the matching groove 33, the matching plate 52, and the cone 525, when the punch head 5 retracts, the outer slide of the slide rod 55 will push the matching plate 52 out through the cone 525 and the extrusion plate 523, so that the matching plate 52 is snapped into the matching groove 33. Then, the punch head 5 drives the grinding ring 31 to rotate to grind the flange. When the matching plate 52 is about to move out of the matching groove 33, the extrusion plate 523 and the matching plate 52 can be pushed into the inner shrinkage cavity 2 521 by the extrusion of the inclined surface of the matching plate 52. This setting enables the device to not only grind the flange, but also prevent the matching plate 52 from affecting the reset of the punch head 5.

[0029] Specifically, it also includes a support plate 7, which is fixed to the top of the workbench 1 by two columns 71. A slide block 72 slides between the two columns 71. A second hydraulic cylinder 73 is fixed to the top of the support plate 7. The telescopic rod of the second hydraulic cylinder 73 passes through the support plate 7 and is fixedly connected to the slide block 72. An extension plate 74 is fixed to one side of the slide block 72. A first cylinder 75 is fixed to the top of the extension plate 74. The telescopic rod of the first cylinder 75 passes through the extension plate 74 and extends to the bottom of the extension plate 74 and is fixed to a pressure plate. The pressure plate is located directly above the outer tube 2. The second hydraulic cylinder 73 can drive the pressure plate to rise and fall through the slide block 72 and the extension plate 74. The first cylinder 75 can drive the pressure plate to press down the energy-absorbing box between the outer tube 2 and the inner tube 3 to prevent the energy-absorbing box from moving during punching.

[0030] Specifically, it also includes side plates 76, which are provided with two and symmetrically fixed on both sides of the extension plate 74. A second cylinder 77 is fixed on the outer side of the side plate 76. The telescopic rod of the second cylinder 77 passes through the side plate 76 and is fixed with a locking block that matches the lifting ring 224. After the punching is completed, the telescopic rod of the second cylinder 77 pushes the locking block into the lifting ring 224. Then, the second hydraulic cylinder 73 pulls the slide 72 to rise, so that the upper ring 223, lower ring 222, connecting rod 221 and energy absorption box can be lifted out at the same time for easy operation.

[0031] Working principle: When installing the energy-absorbing box, place the energy-absorbing box between the outer tube 2 and the inner tube 3, so that the telescopic rod of the second cylinder 73 pushes the slide 72 down. When the second cylinder 73 reaches its maximum stroke, the locking block is just outside the locking hole of the lifting ring 224, so that the first cylinder 75 pushes the pressure plate down to press the energy-absorbing box.

[0032] During punching, four hydraulic cylinders 41 are activated. The telescopic rods of hydraulic cylinders 41 push the push plate 4 to slide inward. The punching head 5 on the inner side of the push plate 4 punches the energy absorption box and pushes the punched waste material into the inner tube 3 through the grinding ring 31. Finally, the waste material falls off.

[0033] During grinding, when the inner end of the punch head 5 is flush with the inner end of the outer perforation 21, as the punch head 5 continues to slide inward, the spring seat 551 loses its compression, and the slide rod 55 slides outward under the action of the first spring 552. At this time, the piston plate 518 slides and generates air pressure. Since the grinding plate 51 is blocked by the outer perforation 21 and cannot slide outward, the air pressure enters the compensation chamber 512 to store energy, and the inclined surface of the cone head 525 will push the extrusion plate 523 to slide outward. However, since the matching plate 52 is blocked, the extrusion plate 523 cannot slide outward, which will also cause the slide rod 55 to be unable to slide outward. When the second inner shrinkage chamber 521 is completely inserted into the inner tube 3, the matching plate 52 loses its resistance, and the slide rod 55, under the action of the spring... Under the action of 552, it continues to slide outward. The cone head 525 pushes the extrusion plate 523 and the matching plate 52 to slide outward. The matching plate 52 extends to the outside of the inner shrinkage cavity 521. At this time, the pressure sensor 543 senses the pressure reduction and transmits the signal to the external controller. The external controller controls the motor 53 to rotate and at the same time controls the extension rod of the hydraulic cylinder 41 to retract. When it retracts to the set distance, the hydraulic cylinder 41 stops retracting. At this time, the matching plate 52 is inserted into the matching groove 33. The grinding plate 51 is located in the punch hole. The punch head 5 drives the grinding plate 51 to rotate to grind the burrs on the inside of the punch hole. The punch head 5 drives the grinding ring 31 to rotate through the matching plate 52 to grind the flange.

[0034] After grinding, the motor 53 stops running after the set time. The hydraulic cylinder 41 pulls the punch head 5 back through the push plate 4. When the inclined surface on the matching plate 52 touches the end of the matching groove 33, the matching plate 52 and the pressing plate 523 are squeezed and retract into the inner shrinkage cavity 521. At the same time, the slide rod 55 is pushed back part of the way. When the spring seat 551 contacts the hook plate 562 but the punch head 5 is still resetting, the slide rod 55 will be pressed further into the punch head 5, and the piston plate 518 will reset. The system draws air pressure from the inner shrinking chamber 511 and the compensation chamber 512, causing the grinding plate 51 and piston plate 514 to reset. After the hydraulic cylinder 41 resets, the cylinder 77 pushes the locking block into the lifting ring 224. Then, the hydraulic cylinder 73 pulls the slide 72 to rise, lifting the upper ring 223, lower ring 222, connecting rod 221, and energy-absorbing box. Finally, the energy-absorbing box is removed, the cylinder 77 is reset, and the upper ring 223, lower ring 222, and connecting rod 221 are manually lowered back down.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-speed four-sided drilling machine for energy-absorbing boxes, comprising a worktable (1), characterized in that, Also includes: The outer tube (2) is fixed to the top of the workbench (1), and the inner tube (3) is fixed inside it. An external through hole (21) is opened through its side wall. A grinding ring (31) matching the external through hole (21) is opened through the side wall of the inner tube (3). The outer tube (2) and the inner tube (3) are used to fix the energy absorption box. The push plate (4) slides on the outside of the outer tube (2), and its outer side is fixed to the telescopic rod of the oil cylinder (41) on the worktable (1). The inner side is provided with a punch head (5), which slides in the outer through hole (21). The side of the punch head (5) is provided with a grinding plate (51) and a matching plate (52). The outer side of the push plate (4) is fixed with a motor (53), which is connected to the punch head (5). The grinding plate (51) is used to grind the inner side of the punch hole, and the matching plate (52) is used to drive the grinding ring (31) to rotate and grind the flange of the punch hole.

2. The high-speed four-sided drilling machine for energy-absorbing boxes according to claim 1, characterized in that, Also includes: The base (6) is fixed to the top of the workbench (1), and the bottom ends of the outer tube (2) and the inner tube (3) are both fixed to its top. The workbench (1) and the base (6) are both provided with through holes that match the bottom end of the inner tube (3). The top plate (61) is fixed above the base (6) by a support column (62), and the outer tube (2) is installed through the top plate (61), with the top end of the outer tube (2) flush with the upper surface of the top plate (61). A pad (411) is fixed to the top of the workbench (1), and a hydraulic cylinder (41) is fixed to its top.

3. The high-speed four-sided drilling machine for energy-absorbing boxes according to claim 1, characterized in that, Also includes: The extension cavity (22) has two vertical openings at two opposite corners inside the outer tube (2). Inside the extension cavity, there is a connecting rod (221). The bottom ends of the two connecting rods (221) are fixedly connected by a lower ring (222). The lower ring (222) slides between the outer tube (2) and the inner tube (3). The top ends of the two connecting rods (221) are fixedly connected by an upper ring (223). The upper ring (223) is mounted on the top of the outer tube (2). The top of the upper ring (223) is fixed with a lifting ring (224).

4. A high-speed four-sided drilling machine for energy-absorbing boxes according to claim 1, characterized in that, Also includes: The turntable (54) rotates inside the push plate (4), and an internal gear (541) is coaxially fixed at its outer end. The internal gear (541) is connected to the drive gear on the output shaft of the motor (53) via a key through the toothed belt inside the push plate (4). Linkage 2 (542) has one end fixed to the inner end of the turntable (54) and the other end fixedly connected to the outer end of the punch head (5); A pressure sensor (543) is located at the end of the turntable (54) away from the punch head (5) and is connected to the motor (53) via an external controller.

5. A high-speed four-sided drilling machine for energy-absorbing boxes according to claim 1, characterized in that, Also includes: A slide bar (55) slides inside the punch head (5), and its outer end extends out of the punch head (5) and is fixed with a spring seat (551). A spring (552) is provided between the spring seat (551) and the punch head (5). The mounting tube (56) is fixed to the side of the outer tube (2). Inside it, a hook plate (562) is slidably installed via a tension spring (561). The hook plate (562) is L-shaped, and a section of the hook plate (562) away from the mounting tube (56) slides between the punch head (5) and the push plate (4).

6. A high-speed four-sided drilling machine for energy-absorbing boxes according to claim 5, characterized in that, Also includes: The inner cavity 1 (511) is opened on the side of the punch head (5), the grinding plate (51) is sealed and slid inside it, the grinding plate (51) is provided with a compensation cavity (512), the inside of the compensation cavity (512) is sealed and slidable by a spring 2 (513), the compensation cavity (512) is fixed with a limit plate (515) near the outside, and the outside of the grinding plate (51) is opened through the pressure stabilizing hole (516). The piston chamber (517) is located inside the stamping head (5) and on the side of the slide rod (55). One end of the piston chamber (517) near the spring seat (551) is connected to the inner shrinkage chamber (511). The side of the slide rod (55) is fixed with a piston plate (518), which slides in a sealed manner within the piston chamber (517).

7. A high-speed four-sided drilling machine for energy-absorbing boxes according to claim 6, characterized in that, Also includes: A retaining ring (32) is coaxially fixed to the outer surface of the grinding ring (31). The grinding ring (31) rotates on the side wall of the inner tube (3) through the retaining ring (32). The inner end of the inner side of the grinding ring (31) is provided with a matching groove (33) for the matching plate (52). The second inner shrinking cavity (521) is located outside the stamping head (5) and on the side of the first inner shrinking cavity (511) away from the spring seat (551). Inside it, a pressing plate (523) slides through a tension spring (522), and a matching plate (52) is fixed to the outside of the pressing plate (523). The sliding cavity (524) is located inside the stamping head (5) and on the side of the slide rod (55). Its outer side is connected to the inner shrinking cavity (521). A cone (525) slides inside the cavity. One end of the cone (525) is fixedly connected to the inner end of the slide rod (55). The inclined surface of the cone (525) abuts against the extrusion plate (523).

8. A high-speed four-sided drilling machine for energy-absorbing boxes according to claim 1, characterized in that, Also includes: The pallet (7) is fixed to the top of the workbench (1) by two columns (71). A slide (72) slides between the two columns (71). A hydraulic cylinder (73) is fixed to the top of the pallet (7). The telescopic rod of the hydraulic cylinder (73) passes through the pallet (7) and is fixedly connected to the slide (72). An extension plate (74) is fixed to one side of a slide (72), and a cylinder (75) is fixed to its top. The telescopic rod of the cylinder (75) passes through the extension plate (74) and extends to the bottom of the extension plate (74) and is fixed with a pressure plate. The pressure plate is located directly above the outer tube (2).

9. A high-speed four-sided drilling machine for energy-absorbing boxes according to claim 3, characterized in that, Also includes: The side plate (76) has two symmetrically fixed on both sides of the extension plate (74), and the outer side is fixed with cylinder two (77). The telescopic rod of cylinder two (77) passes through the side plate (76) and is fixed with a matching lifting ring (224) block.

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