Automatic laser cutting manipulator for water gap of automobile exterior trim and forming equipment thereof

Abstract

This invention relates to the field of injection-molded metal cutting technology, specifically to an automatic laser cutting robot for automotive exterior parts and its forming equipment, comprising: a frame, on which a robotic arm is mounted, and a laser cutting device is connected; a support frame, rotatably mounted on the frame, with multiple sets of support structures at the bottom of the support frame for supporting the automotive exterior parts; an elastic clamping assembly, mounted on the support frame, for clamping the side of the automotive exterior parts, the elastic clamping assembly having a built-in cylindrical spring, and a second electric telescopic rod mounted on the support frame capable of driving the elastic clamping assembly to release the automotive exterior parts; and a pre-tensioning mechanism connected to the cylindrical spring, the pre-tensioning mechanism including a helical propulsion assembly and a rotating assembly, the two being connected by a toothed belt, the helical propulsion assembly and the rotating assembly cooperating to further compress the cylindrical spring when the support frame rotates, improving the stability of the exterior parts during the cutting process.

Description

Technical Field

[0001] This invention relates to the field of injection molding metal cutting technology, specifically to an automatic laser cutting robot for automotive exterior parts sprue and its forming equipment. Background Technology

[0002] In the production of automotive exterior parts, injection molding is the mainstream process. However, for long exterior parts such as front and rear bumpers and side skirts, metal insert injection molding is commonly used to improve structural strength. The sprue marks left after injection molding are usually removed in one go by a laser-cutting robotic arm. However, when the length of the exterior part exceeds the working radius of the robotic arm, a single cut cannot cover all the sprue marks. Moreover, long-term operation of the robotic arm at its maximum working radius can easily cause abnormal wear. Therefore, two practices have emerged in the industry:

[0003] One approach is to have the robotic arm slide from one end of the exterior trim to the other using a ground rail to continue cutting. However, this method requires recalibrating the position, and the secondary positioning is both time-consuming and prone to introducing errors. The other approach is to have the exterior trim rotate 180° so that the robotic arm can complete the remaining cutting in place, which can eliminate the need for secondary positioning. However, the exterior trim is only fixed by the original anti-deformation clamping force, and it is prone to displacement when subjected to centrifugal force and vibration during rotation, which leads to a decrease in the accuracy of subsequent cutting. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic laser cutting robot for automotive exterior parts and its forming equipment, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An automated laser cutting robot for automotive exterior sprue marks includes:

[0007] A frame, on which a robotic arm is mounted, and on which a laser cutting device is connected;

[0008] A support frame is rotatably mounted on the frame, and the bottom of the support frame is provided with multiple sets of support structures for supporting automotive exterior parts;

[0009] An elastic clamping assembly, mounted on the support frame, is used to clamp the side of the automotive exterior trim. The elastic clamping assembly has a built-in cylindrical spring, and a second electric telescopic rod mounted on the support frame can drive the elastic clamping assembly to release the automotive exterior trim.

[0010] A pre-tensioning mechanism is connected to the cylindrical spring. The pre-tensioning mechanism includes a helical propulsion assembly and a rotating assembly, which are connected by a toothed belt. The helical propulsion assembly and the rotating assembly cooperate to further compress the cylindrical spring when the support frame rotates.

[0011] As a further aspect of the present invention: the supporting structure includes multiple sets of first electric telescopic rods fixedly installed on the support frame and a first abutting plate adapted thereto. A spherical connecting seat is formed on the driving end of the first electric telescopic rod, and the ball head connecting the first abutting plate is disposed in the spherical connecting seat.

[0012] As a further embodiment of the present invention: the elastic clamping assembly includes a connecting plate fixedly installed on the side of the support frame, a fixing sleeve fixedly installed on the connecting plate, the interior of the fixing sleeve is a hollow structure, and a traction shaft is slidably arranged inside the fixing sleeve. One end of the traction shaft is provided with a second abutment plate, and the other end is connected to the second electric telescopic rod through a misaligned structure.

[0013] The cylindrical spring is sleeved on the traction shaft, and one end of the cylindrical spring is connected to a limiting ring provided on the traction shaft, and the other end is connected to the helical propulsion assembly.

[0014] As a further embodiment of the present invention: the misaligned structure includes a fitting component that is slidably installed in the fixed sleeve, the fitting component being coaxially and fixedly connected to the traction shaft, and the diameter of the fitting component being larger than the diameter of the traction shaft;

[0015] The misaligned structure also includes a hysteresis groove provided along the length direction of the fitting and a protrusion fixedly connected to the actuating end of the second electric telescopic rod, the protrusion being able to slide within the hysteresis groove.

[0016] As a further embodiment of the present invention: the rotating assembly includes a drive shaft rotatably mounted on the support frame and connected to the toothed belt, and an abutment wheel is provided at the end of the drive shaft away from the toothed belt, the abutment wheel being eccentric to the axis of the drive shaft;

[0017] The rotating assembly also includes two sets of arc-shaped components arranged circumferentially along the axis of rotation of the support frame. One end of each arc-shaped component is provided with an inclined surface. When the support frame rotates, the abutment wheel cooperates with the inclined surface to enable the drive shaft to rotate.

[0018] As a further embodiment of the present invention: the helical propulsion assembly includes:

[0019] A rotating sleeve is slidably fitted onto the fixed sleeve. A guide structure is provided between the rotating sleeve and the fixed sleeve. The guide structure enables the rotating sleeve to move along the length direction of the fixed sleeve when the rotating sleeve rotates.

[0020] A follower sleeve is connected to the toothed belt. The follower sleeve is rotatably connected to the connecting part of the connecting plate, and the follower sleeve and the rotating sleeve are coaxially fitted together. A limiting structure provided between the follower sleeve and the rotating sleeve enables them to rotate synchronously.

[0021] As a further embodiment of the present invention: the guide structure includes a spiral groove disposed on the side wall of the rotating sleeve and a convex shaft fixedly installed on the outside of the fixed sleeve, the convex shaft being able to slide within the spiral groove.

[0022] As a further embodiment of the present invention: the limiting structure includes a limiting groove disposed on the inner wall of the follower sleeve and a limiting block disposed on the outer wall of the rotating sleeve, wherein the limiting groove and the limiting block are slidably engaged to keep the follower sleeve and the rotating sleeve axially locked.

[0023] A molding apparatus, comprising the aforementioned automatic laser cutting robot for automotive exterior sprue gates.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The pre-tightening mechanism allows the rotating sleeve to move toward the second abutment plate during the rotation of the outer trim piece by the rotating frame, thereby further compressing the cylindrical spring. This allows the outer trim piece to be clamped with greater force during rotation, preventing it from shifting due to centrifugal force or vibration. After rotation, the robotic arm can still perform stable and precise cutting actions.

[0026] The flexible clamping components and support structure enable stable clamping of the outer trim, preventing the presence of a "lost support area" in the support area of ​​the outer trim. This would prevent the outer trim from shifting due to vibration during laser cutting of the sprue on the outer trim, and also avoid the "lost support area" from resonating under vibration. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one embodiment of an automated laser cutting robot for automotive exterior parts sprue.

[0028] Figure 2 This is a schematic diagram of the structure of the automatic laser cutting robot for automotive exterior parts after the removal of the frame, robotic arm, and laser cutting device, as shown in one embodiment.

[0029] Figure 3 This is a schematic diagram of the structure of the automatic laser cutting robot for automotive exterior parts after the removal of the sprue marks, from another angle, in one embodiment.

[0030] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle.

[0031] Figure 5 This is a schematic diagram of the rotating component in one embodiment of an automated laser cutting robot for automotive exterior parts.

[0032] Figure 6 This is a schematic diagram of the support structure in one embodiment of an automated laser cutting robot for automotive exterior parts sprue.

[0033] Figure 7 An exploded view of the supporting structure in one embodiment of an automated laser cutting robot for automotive exterior parts sprue marks.

[0034] Figure 8 This is a schematic diagram of the elastic clamping component and the pre-tightening mechanism in one embodiment of an automatic laser cutting robot for automotive exterior parts.

[0035] Figure 9 This is a schematic diagram of the elastic clamping component in one embodiment of an automated laser cutting robot for automotive exterior parts.

[0036] Figure 10 This is a cross-sectional view of the elastic clamping assembly and the spiral propulsion assembly in one embodiment of an automatic laser cutting robot for automotive exterior parts.

[0037] Figure 11 This is a schematic diagram of the misaligned structure in one embodiment of an automated laser cutting robot for automotive exterior parts.

[0038] Figure 12 An exploded view of the spiral propulsion component in one embodiment of an automated laser cutting robot for automotive exterior parts sprue.

[0039] In the diagram: 1. Frame; 2. Robotic arm; 3. Laser cutting device; 4. Stepper motor; 5. Support frame; 6. First electric telescopic rod; 601. Spherical connecting seat; 7. First abutment plate; 8. Ball head; 9. Arc-shaped part; 901. Inclined surface; 10. Drive shaft; 1001. Abutment wheel; 11. Toothed belt; 12. Follower sleeve; 1201. Limiting groove; 13. Rotating sleeve; 1301. Limiting block; 1302. Spiral groove; 14. Fixed sleeve; 1401. Convex shaft; 15. Traction shaft; 1501. Restriction ring; 16. Cylindrical spring; 17. Second abutment plate; 18. Fitting part; 1801. Hysteresis groove; 19. Second electric telescopic rod; 1901. Actuating end; 1902. Protrusion; 20. Connecting plate; 21. Connecting part. Detailed Implementation

[0040] 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.

[0041] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0042] In this application, the automatic laser cutting robot for automotive exterior parts is mainly used to process long automotive exterior parts, such as front and rear bumpers and side skirts.

[0043] Please see Figures 1-12 In this embodiment of the invention, an automatic laser cutting robot for automotive exterior parts sprues includes: a frame 1, a support frame 5, an elastic clamping assembly, and a pre-tightening mechanism.

[0044] A robotic arm 2 is mounted on the frame 1, and a laser cutting device 3 is connected to the robotic arm 2;

[0045] The support frame 5 is rotatably mounted on the frame 1. Specifically, a stepper motor 4 is fixedly mounted on the frame 1. The output shaft of the stepper motor 4 is connected to the support frame 5. The bottom of the support frame 5 is provided with multiple sets of support structures for supporting automotive exterior parts. The support structure includes multiple sets of first electric telescopic rods 6 fixedly mounted on the support frame 5 and first abutment plates 7 adapted thereto. A spherical connecting seat 601 is formed on the driving end of the first electric telescopic rod 6. The ball head 8 connecting the first abutment plate 7 is disposed in the spherical connecting seat 601.

[0046] In this embodiment, in the initial state, multiple sets of first electric telescopic rods 6 control the first abutment plates 7 to be at the same height. At this time, the automotive exterior parts to be processed are placed on the support frame 5, and the automotive exterior parts can be supported by multiple sets of first abutment plates 7. Subsequently, multiple sets of first electric telescopic rods 6 operate respectively, keeping the automotive exterior parts at a predetermined height and horizontal, while making each first abutment plate 7 fit with the bottom of the automotive exterior parts, thereby providing a good support effect for the automotive exterior parts.

[0047] Specifically, the bottom surfaces of automotive exterior parts, such as front and rear bumpers and side skirts, are not perfectly flat. If multiple sets of first abutment plates 7 are kept at the same height to support the automotive exterior parts, then there will inevitably be local areas of the automotive exterior parts that are suspended. The existence of these suspended areas results in "missing support areas" in the support of the automotive exterior parts. This can easily cause the exterior parts to shift due to vibration when laser cutting the sprue on the exterior parts. Furthermore, the "missing support areas" are prone to resonance under vibration, which can cause the laser cutting device 3 to have operational errors even if the exterior parts do not shift, thereby affecting the cutting accuracy.

[0048] Furthermore, when the first abutting plate 7 abuts against the automotive exterior trim, the first abutting plate 7 will automatically adjust its angle under the pressure of the exterior trim. At this time, the ball head 8 can move within the spherical connecting seat 601, so that the first abutting plate 7 can maintain the highest possible fit with the exterior trim, thereby further improving the abutting effect between the first abutting plate 7 and the exterior trim and ensuring the stability of the exterior trim during the laser cutting process.

[0049] Please see Figures 10-12 The elastic clamping assembly is mounted on the support frame 5 and is used to clamp the side of the automotive exterior parts. The elastic clamping assembly has a built-in column spring 16, and the second electric telescopic rod 19 mounted on the support frame 5 can drive the elastic clamping assembly to release the automotive exterior parts.

[0050] The elastic clamping assembly includes a connecting plate 20 fixedly installed on the side of the support frame 5. A fixing sleeve 14 is fixedly installed on the connecting plate 20. The interior of the fixing sleeve 14 is hollow, and a traction shaft 15 is slidably arranged inside the fixing sleeve 14. One end of the traction shaft 15 is provided with a second abutment plate 17, and the other end is connected to the second electric telescopic rod 19 through a misaligned structure.

[0051] The cylindrical spring 16 is sleeved on the traction shaft 15, and one end of the cylindrical spring 16 is connected to the limiting ring 1501 provided on the traction shaft 15, and the other end is connected to the pre-tightening mechanism.

[0052] It should also be noted that both the first abutting plate 7 and the second abutting plate 17 mentioned above are made of soft rubber. This allows the first abutting plate 7 and the second abutting plate 17 to deform accordingly when they abut against the bottom of the automotive exterior trim and against the irregularly shaped side of the automotive exterior trim. This allows them to better fit the outer side of the automotive exterior trim and provides a larger contact area between the automotive exterior trim and the first abutting plate 7 and the second abutting plate 17. This ensures that the automotive exterior trim has sufficient stability during the laser cutting process.

[0053] After the first abutment plate 7 completes its support for the bottom of the outer trim, the cylindrical spring 16, which is initially in a compressed state, can drive the traction shaft 15 to move toward the side of the outer trim. After the second abutment plate 17 is attached to the side of the outer trim, the side of the outer trim is fixed. That is, in this embodiment, the outer trim has the effect of being fixed by the cooperation of the first abutment plate 7 and the second abutment plate 17, which maximizes the stability of the outer trim during the laser cutting process.

[0054] Please see Figures 10-11 The misaligned structure includes a fitting 18 that is slidably installed in the fixed sleeve 14. The fitting 18 is coaxially fixedly connected to the traction shaft 15, and the diameter of the fitting 18 is larger than the diameter of the traction shaft 15.

[0055] The misaligned structure also includes a hysteresis groove 1801 provided along the length of the fitting 18 and a protrusion 1902 fixedly connected to the actuating end 1901 of the second electric telescopic rod 19. The protrusion 1902 can slide within the hysteresis groove 1801.

[0056] In the initial state, the actuating end 1901 of the second electric telescopic rod 19 is in a retracted state. At this time, the protrusion 1902 and the end of the accommodating groove 1801 away from the second abutting plate 17 are in abutting state, while the second abutting plates 17 located on both sides of the exterior trim are in a separated state. After supporting the bottom of the automotive exterior trim, the actuating end 1901 of the second electric telescopic rod 19 will move towards the exterior trim. During this process, the compressed cylindrical spring 16 will release its elastic potential energy. When the second abutting plate 17 is in contact with the exterior trim, the actuating end 1901 of the second electric telescopic rod 19 will continue to move. During this process, the spring 16 will release its elastic potential energy. With the second abutment plate 17 already abutting against the outer trim piece, the fitting piece 18 is in a stationary state, allowing the protrusion 1902 to separate from the side wall of the accommodating groove 1801. That is, during the process of the second abutment plate 17 fitting against the outer trim piece to clamp it, the clamping force comes entirely from the second abutment plate 17. Compared with the prior art of using a cylinder to directly drive the clamping, this avoids the over-clamping of the outer trim piece caused by the error of the cylinder action, which could lead to deformation of the outer trim piece due to excessive clamping force, or displacement of the outer trim piece during laser cutting due to insufficient clamping force, resulting in a decrease in cutting accuracy.

[0057] Furthermore, since the second abutment plate 17 is clamped by the elastic force provided by the column spring 16, it can achieve relatively good clamping even when there is a slight error in the size of the exterior trim. In addition, the second abutment plate 17 can clamp the exterior trim within a certain width range for different models of automotive exterior trim.

[0058] Furthermore, in the clamping state, the fact that the protrusion 1902 does not abut against the side of the hysteresis groove 1801 also has the following effect: during the rotation of the support frame 5, the cylindrical spring 16 can be further compressed by the pre-tightening mechanism, and the outer trim has a certain elasticity. When the second abutment plate 17 acts on the outer trim with a greater force, the outer trim will inevitably undergo a certain deformation. At this time, the second abutment plate 17 can also move further during the deformation of the outer trim, so that the fitting 18 moves within the fixed sleeve 14. Since the protrusion 1902 does not abut against the side of the hysteresis groove 1801, the fitting 18 can perform the corresponding movement, thereby preventing the fitting 18 from locking and causing even if the cylindrical spring 16 is further compressed, it will not be able to generate a greater clamping force on the outer trim.

[0059] Please see Figures 4-5 The pre-tensioning mechanism is connected to the cylindrical spring 16. The pre-tensioning mechanism includes a spiral propulsion assembly and a rotating assembly, which are connected by a toothed belt 11. The spiral propulsion assembly and the rotating assembly cooperate to further compress the cylindrical spring 16 when the support frame 5 rotates.

[0060] The rotating assembly includes a drive shaft 10 rotatably mounted on the support frame 5 and connected to the toothed belt 11. An abutment wheel 1001 is provided at one end of the drive shaft 10 away from the toothed belt 11. The abutment wheel 1001 is eccentric to the axis of the drive shaft 10.

[0061] The rotating assembly also includes two sets of arc-shaped parts 9 arranged circumferentially along the axis of rotation of the support frame 5. One end of each arc-shaped part 9 is provided with an inclined surface 901. When the support frame 5 rotates, the abutment wheel 1001 cooperates with the inclined surface 901 to enable the drive shaft 10 to rotate.

[0062] In this embodiment, after the laser cutting device 3 completes the cutting of one side of the sprue of the outer trim, the stepper motor 4 will rotate 180°. When the outer trim is in the cutting position, the abutment wheel 1001 will not abut against the curved part 9, ensuring that the second abutment plate 17 does not exert excessive pressure on the outer trim during cutting, preventing deformation. After the laser cutting device 3 completes the cutting of one side of the sprue of the outer trim, the stepper motor 4 will drive the support frame 5 to rotate 180°. During this process, the drive shaft 10 and the abutment wheel 1001 will follow the support frame 5 in a circular motion, allowing... The abutting wheel 1001 can abut against the inclined surface 901 and drive the abutting wheel 1001 to rotate relative to the drive shaft 10, thereby driving the drive shaft 10 to rotate. The angular momentum generated by the rotation of the drive shaft 10 drives the spiral propulsion assembly to move through the toothed belt 11, so as to further compress the column spring 16, so that the second abutting plate 17 can generate a greater clamping force on the outer trim during the circular motion of the support frame 5, so as to prevent the outer trim from shifting due to the centrifugal force or vibration generated during rotation, so that after the rotation is completed, the robotic arm 2 can still perform a stable and precise cutting action.

[0063] Furthermore, during the rotation of the support frame 5, the abutment wheel 1001 can abut against the upper surface of the arc-shaped member 9, thereby maintaining the clamping force. When the support frame 5 rotates 180°, the abutment wheel 1001 can separate from the arc-shaped member 9, allowing the drive shaft 10 to rotate in the opposite direction, restoring the position of the abutment wheel 1001 relative to the drive shaft 10 to its initial state.

[0064] Furthermore, in actual operation, the time that the support frame 5 is in the cutting position is much longer than the time it takes to rotate 180°. That is, during the rotation of the support frame 5, only a relatively short period of greater clamping force is applied to the outer trim. Although the clamping force is large, the duration is short, which can prevent the outer trim from being excessively squeezed and deformed. However, if a large clamping force is always applied to the outer trim, the outer trim will be deformed due to the large clamping force during the entire sprue cutting process, which will affect the subsequent production and assembly of the outer trim.

[0065] Please see Figures 9-10 , Figure 12 The spiral propulsion assembly includes: a rotating sleeve 13 and a follower sleeve 12.

[0066] The rotating sleeve 13 is slidably sleeved on the fixed sleeve 14. A guide structure is provided between the rotating sleeve 13 and the fixed sleeve 14. The guide structure enables the rotating sleeve 13 to move along the length direction of the fixed sleeve 14 when the rotating sleeve 13 rotates.

[0067] The guiding structure includes a spiral groove 1302 disposed on the side wall of the rotating sleeve 13 and a convex shaft 1401 fixedly installed on the outside of the fixed sleeve 14. The convex shaft 1401 is capable of sliding within the spiral groove 1302.

[0068] In this embodiment, when the drive shaft 10 rotates, the toothed belt 11 can drive the rotating sleeve 13 to rotate. Since the spiral groove 1302 and the convex shaft 1401 are in a sliding connection state, when the rotating sleeve 13 rotates, it can move relative to the fixed sleeve 14 toward the second abutment plate 17. At this time, the rotating sleeve 13 can push the end of the cylindrical spring 16 away from the limiting ring 1501, so that the cylindrical spring 16 can be further compressed, so that the second abutment plate 17 can generate a greater clamping force on the outer trim.

[0069] When the support frame 5 completes its rotation and the other side of the exterior trim is within the range of motion of the robotic arm 2, the abutment wheel 1001 can separate from the end of the arc-shaped part 9 during movement. At this time, the cylindrical spring 16 releases its elastic potential energy, causing the rotating sleeve 13 to move toward the connecting plate 20. At the same time, the rotating sleeve 13 rotates in the opposite direction and drives the abutment wheel 1001 to reset through the toothed belt 11.

[0070] Specifically, the end of the cylindrical spring 16 away from the limiting ring 1501 is connected to the rotating sleeve 13, and a ball bearing is provided between the two. The ball bearing can reduce the friction between the cylindrical spring 16 and the rotating sleeve 13, thereby preventing the cylindrical spring 16 from being torsion spring during the rotation of the rotating sleeve 13, thus affecting the magnitude of the elastic force it generates.

[0071] Please see Figure 12 The follower sleeve 12 is connected to the toothed belt 11. The follower sleeve 12 is rotatably connected to the connecting part 21 connected to the connecting plate 20. The follower sleeve 12 and the rotating sleeve 13 are coaxially rotated and fitted together. The limiting structure provided between the follower sleeve 12 and the rotating sleeve 13 can make the two rotate synchronously.

[0072] The limiting structure includes a limiting groove 1201 provided on the inner wall of the follower sleeve 12 and a limiting block 1301 provided on the outer wall of the rotating sleeve 13. The limiting groove 1201 and the limiting block 1301 are slidably engaged to keep the follower sleeve 12 and the rotating sleeve 13 axially locked.

[0073] In this embodiment, the cooperation between the limiting groove 1201 and the limiting block 1301 enables the rotating sleeve 13 to drive the follower sleeve 12 to rotate, and the follower sleeve 12 can also drive the rotating sleeve 13 to rotate. During the rotation of the follower sleeve 12, the rotating sleeve 13 rotates along with it and can undergo lateral displacement under the cooperation of the spiral groove 1302 and the convex shaft 1401, so that the rotating sleeve 13 can undergo axial lateral displacement relative to the follower sleeve 12.

[0074] As an embodiment of the present invention, a molding device is also proposed, including the aforementioned automatic laser cutting robot for automotive exterior parts sprue.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automated laser cutting robot for automotive exterior sprue marks, comprising: A frame, on which a robotic arm is mounted, and on which a laser cutting device is connected; Its characteristic is that it further includes: A support frame is rotatably mounted on the frame, and the bottom of the support frame is provided with multiple sets of support structures for supporting automotive exterior parts; An elastic clamping assembly, mounted on the support frame, is used to clamp the side of the automotive exterior trim. The elastic clamping assembly has a built-in cylindrical spring, and a second electric telescopic rod mounted on the support frame can drive the elastic clamping assembly to release the automotive exterior trim. A pre-tensioning mechanism is connected to the cylindrical spring. The pre-tensioning mechanism includes a helical propulsion assembly and a rotating assembly, which are connected by a toothed belt. The helical propulsion assembly and the rotating assembly cooperate to further compress the cylindrical spring when the support frame rotates. The elastic clamping assembly includes a connecting plate fixedly installed on the side of the support frame, a fixing sleeve fixedly installed on the connecting plate, the inside of the fixing sleeve is a hollow structure, and a traction shaft is slidably arranged inside the fixing sleeve. One end of the traction shaft is provided with a second abutment plate, and the other end is connected to the second electric telescopic rod through a misalignment structure. The cylindrical spring is sleeved on the traction shaft, and one end of the cylindrical spring is connected to the limiting ring provided on the traction shaft, and the other end is connected to the helical propulsion assembly; The misaligned structure includes a fitting that is slidably installed inside the fixed sleeve. The fitting is coaxially and fixedly connected to the traction shaft, and the diameter of the fitting is larger than the diameter of the traction shaft. The misaligned structure also includes a hysteresis groove provided along the length direction of the fitting and a protrusion fixedly connected to the actuating end of the second electric telescopic rod, the protrusion being able to slide within the hysteresis groove; The rotating assembly includes a drive shaft rotatably mounted on the support frame and connected to the toothed belt, and an abutment wheel is provided at the end of the drive shaft away from the toothed belt, the abutment wheel being eccentric to the axis of the drive shaft; The rotating assembly also includes two sets of arc-shaped components arranged circumferentially along the axis of rotation of the support frame. One end of each arc-shaped component is provided with an inclined surface. When the support frame rotates, the abutment wheel cooperates with the inclined surface to enable the drive shaft to rotate. The helical propulsion assembly includes: A rotating sleeve is slidably fitted onto the fixed sleeve. A guide structure is provided between the rotating sleeve and the fixed sleeve. The guide structure enables the rotating sleeve to move along the length direction of the fixed sleeve when the rotating sleeve rotates. A follower sleeve is connected to the toothed belt. The follower sleeve is rotatably connected to the connecting part of the connecting plate, and the follower sleeve and the rotating sleeve are coaxially fitted together. A limiting structure provided between the follower sleeve and the rotating sleeve enables them to rotate synchronously.

2. The automatic laser cutting robot for automotive exterior sprue parts according to claim 1, characterized in that, The supporting structure includes multiple sets of first electric telescopic rods fixedly installed on the support frame and a first abutment plate adapted thereto. A spherical connecting seat is formed on the driving end of the first electric telescopic rod, and the ball head connecting the first abutment plate is disposed in the spherical connecting seat.

3. The automatic laser cutting robot for automotive exterior sprue parts according to claim 1, characterized in that, The guide structure includes a spiral groove provided on the side wall of the rotating sleeve and a convex shaft fixedly installed on the outside of the fixed sleeve, the convex shaft being able to slide within the spiral groove.

4. The automatic laser cutting robot for automotive exterior sprue parts according to claim 1, characterized in that, The limiting structure includes a limiting groove provided on the inner wall of the follower sleeve and a limiting block provided on the outer wall of the rotating sleeve. The limiting groove and the limiting block are slidably engaged to keep the follower sleeve and the rotating sleeve axially locked.

5. A molding apparatus, characterized in that it includes an automatic laser cutting robot for automotive exterior sprue as described in any one of claims 1 to 4.

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