A laser cutting automatic feeding device and a feeding method thereof

Abstract

This invention discloses an automatic feeding device and method for laser cutting. The feeding device includes a drive assembly and two guide assemblies connected to each other. Each guide assembly includes a guide groove with a feeding step. A feeding shaft is located in the center of the inner side of the guide groove, and driving and driven wheels connected at both ends by a first synchronous belt. Both ends of the first synchronous belt are simultaneously connected to both ends of the feeding shaft. A stacking device is located at the top of the two guide grooves. Multiple baffles are located on one side of the feeding shaft, and rollers are located on the other side. An opening is located in the center of the guide groove, and a one-way track is located outside the opening. A long groove is located inside the one-way track, and a partition plate is located in the center of the long groove, dividing it into lower and upper roller grooves. Front and rear baffles are rotatably mounted at both ends of the partition plate, and the front and rear baffles are respectively contacted with the upper and lower sides of the one-way track by a return torsion spring. The rollers are placed in the lower or upper roller groove. This invention enables automated feeding when batch processing raw materials in a laser cutting machine.

Description

Technical Field

[0001] This invention belongs to the field of laser cutting equipment technology, and relates to an automatic feeding device for laser cutting and its feeding method. Background Technology

[0002] Laser cutting uses a focused, high-energy laser beam instead of a traditional cutting tool to rapidly heat the irradiated material to its melting and vaporization temperatures. Simultaneously, a high-speed airflow coaxial with the laser beam removes the molten and vaporized material, thus cutting the workpiece. Laser cutting involves no contact with the workpiece, resulting in a small heat-affected zone, minimal deformation of the sheet metal, narrow kerf, and a smooth, flat cut.

[0003] Currently, most laser cutting machines operate by manually placing the raw materials, which is slow and time-consuming, especially when large-scale processing is required, resulting in significant time and labor costs and impacting processing efficiency. However, there are also automatic loading and unloading laser cutting machines, such as the one disclosed in CN102500931B. These machines include a hopper for holding multiple sheets of material, a correction mechanism on one side of the hopper to align the sheets, and a seam adjustment mechanism on the other side for passing a single sheet. They also include a feeding mechanism that automatically pushes the bottom sheet from the hopper onto the cutting table via the seam adjustment mechanism. A blocking mechanism on one side of the cutting table restricts the sheet material within the cutting table. This blocking mechanism is connected via a first inductive switch to a target pushing mechanism that pushes the sheet material towards the cutting table's edge. The cutting table has a second inductive switch connected to the laser. When the sheet metal contacts the second inductive switch, the laser emitted by the laser passes through a reflector mount to the cutting head located above the cutting table. After focusing, the laser beam cuts the sheet metal. After cutting, the target-pushing mechanism releases its grip on the sheet metal, the material-blocking mechanism stops blocking the material, and the feeding mechanism continues to push the sheet metal into the receiving hopper, repeating the cutting process. However, the hopper and alignment mechanism of this laser cutting machine can only align the sheet metal from one side, making it unsuitable for sheet metal of different sizes. Furthermore, it uses a feeding cylinder as the drive mechanism to push the bottom sheet metal of the hopper onto the cutting table, resulting in complex equipment and potential instability. Additionally, the feeding mechanism can only push out one sheet metal per cycle, leading to low utilization. Summary of the Invention

[0004] To address the problems existing in the background technology, the present invention provides an automatic feeding device and feeding method for laser cutting, which realizes automated feeding when processing raw materials in batches.

[0005] The technical solution of this invention to solve the technical problem is as follows:

[0006] This invention discloses an automatic laser cutting feeding device, comprising a drive assembly and two symmetrically arranged guide assemblies. Each guide assembly includes a guide groove, and a material stacking device is provided on the same side of the top of both guide grooves. A feeding step is formed at the top edge of each guide groove, and a feeding shaft is provided in the middle of its inner side via a linear bearing. A driving wheel and a driven wheel, connected by a first synchronous belt, are respectively provided at both ends of the inner side of the feeding shaft. Both ends of the first synchronous belt are simultaneously connected to both ends of the feeding shaft. Multiple baffles are evenly spaced on one side of the feeding shaft, and a roller is provided in the middle of the opposite side. The guide groove contains… The device has a slot and a one-way track on the outside of the slot; the one-way track has a long groove with openings at both ends on its inner side, and a partition plate in the middle of the long groove divides the long groove into a lower roller groove and an upper roller groove; a front baffle and a rear baffle are rotatably connected to the two ends of the partition plate, the front baffle is located on one side of the stacking device, and the front baffle and the rear baffle are respectively abutted against the upper and lower inner walls of the long groove on the one-way track by setting a return torsion spring; the drive assembly is connected to the drive wheels on the two guide assemblies; the rollers are placed in the lower roller groove or the upper roller groove.

[0007] Furthermore, it also includes a sliding adjustment assembly, which includes a front base plate and a rear base plate respectively disposed on the front and rear sides of the bottom of the two guide components. A slide rail is disposed on the same side of the front base plate and the rear base plate, and a slider is slidably connected to the slide rail. A first locking handle is disposed on the front and rear sides of one of the guide components and is connected to the two sliders respectively at the first locking handle. The front and rear sides of the bottom of the other guide component are fixedly connected to the front base plate and the rear base plate respectively. The stacking device includes stacking device mounting steps respectively opened on the top of the two guide grooves. A sliding groove is opened along the length direction of the stacking device mounting steps. A stacking rod mounting block is fixedly disposed and slidably disposed on one side of the stacking device mounting steps and on the sliding groove respectively. A stacking rod is fixedly installed on the stacking rod mounting block. A second locking handle is disposed on the stacking rod mounting block slidably disposed in the sliding groove.

[0008] Furthermore, the stacking rod is L-shaped, and its lower part is provided with at least one waist-shaped adjustment hole, which is detachably installed and fixed to the stacking rod mounting block at the waist-shaped adjustment hole.

[0009] Furthermore, the front and rear baffles have fan-shaped sides.

[0010] Furthermore, the rear ends of both the front and rear baffles are connected to a rotating rod, which passes through the one-way track and is connected to a rotating block at its outer end; the reset torsion spring is disposed on the rotating rod, with one end fixed to the one-way track and the other end fixed to the rotating block; limit blocks are respectively provided on the one-way track on both sides of the rotating block.

[0011] Furthermore, a matching inner side plate is installed at the opening of the guide groove, and an inner side plate elongated hole is opened on the inner side plate at a position corresponding to the feeding shaft, and each of the material stop rods extends out from the inner side plate elongated hole.

[0012] Furthermore, each of the aforementioned baffle rods is installed on the side of the feeding shaft via baffle rod fixing screws. A lifting rod is commonly provided on each of the aforementioned baffle rod fixing screws. A clamping claw is provided at the top center of the guide groove via a clamping spring. A clamping rod is connected to the clamping claw. The clamping rod is movably disposed through the guide groove. A clamping block is provided at the bottom end of the clamping rod. The clamping block corresponds to the lifting rod.

[0013] Furthermore, at least one workpiece detection sensor is respectively provided on the stacking device and the guide trough.

[0014] Furthermore, the drive assembly includes a motor installed at one end of the drive wheel of one of the guide assemblies, a small pulley is provided at the output end of the motor, the drive wheels of the two guide assemblies are connected by a spline shaft and a spline nut, a large pulley is provided at one end of the spline shaft of the motor, and the small pulley and the large pulley are connected by a second synchronous belt.

[0015] This invention provides a feeding method for the automatic laser cutting feeding device described above. Before feeding, the rollers mounted on the feeding shaft of the automatic laser cutting feeding device are positioned in the lower roller groove of the unidirectional track, corresponding to the front baffle. The outermost baffle bar on the feeding shaft is positioned in front of the stacking device. At least one workpiece is placed on the stacking device. The drive assembly is activated, causing the two drive wheels of the guide assembly to rotate synchronously. The first synchronous belt drives the feeding shaft to move axially forward. At this time, the top of the baffle bar on the feeding shaft is at its upper limit position. The top of the baffle bar pushes the workpiece forward within the feeding step of the guide groove. The roller on the other side of the feeding shaft is limited by the lower roller groove and moves forward. When the roller moves to the desired position... When the workpiece reaches the rear baffle, it is pushed open and passes through the rear baffle by the roller. The rear baffle is reset by the return torsion spring, and the workpiece is pushed to the next position. The two drive wheels are driven to rotate synchronously in opposite directions by the drive assembly, which drives the feed shaft to move axially backward. Through the action of the rear baffle, the roller enters the upper roller groove from the rear baffle. At the same time, the feed shaft rotates inward due to the change in the height position of the roller, causing the stop bar to tilt inward and its top to be below the lower limit position of the workpiece. When the roller reaches the front baffle and pushes open the front baffle to enter the lower roller groove, the feed shaft rotates outward due to the change in the height position of the roller to return to the initial state. At this time, the stop bar returns to the upper limit position, and the next workpiece can be pushed by the drive assembly, and the above stroke is repeated.

[0016] Compared with the prior art, the automatic laser cutting feeding device and feeding method of the present invention have the following advantages:

[0017] (1) The automatic laser cutting feeding device of the present invention has a novel design and reasonable structure. Through the cooperation of the guide component, the drive component and the stacking device, it realizes automated batch feeding, saves feeding time and improves processing efficiency. At the same time, the automatic feeding device has a small structure size, low cost and can be expanded into multiple feeding forms, which is also convenient for unloading.

[0018] (2) By setting the sliding adjustment component and the sliding groove of the stacking device, the present invention can be easily adjusted according to the front, back, left and right dimensions of the workpiece to be loaded, and has strong applicability.

[0019] (3) The present invention uses an L-shaped stacking rod to facilitate the positioning of the placed workpiece. At the same time, the waist-shaped adjustment hole on the stacking rod can adjust the installation position of the stacking rod and the stacking rod mounting block to meet the needs of loading workpieces of different thicknesses.

[0020] (4) The drive component of the present invention drives the active wheel and the synchronous belt to run through the stepper motor, thereby driving the feeding shaft to reciprocate, which is easy to control and has good operational stability.

[0021] (5) The multiple baffles on the feeding shaft of the present invention facilitate the sequential and intermittent feeding of multiple workpieces to the laser cutting machine during a single feeding process, resulting in high efficiency.

[0022] (6) The present invention uses rollers installed on the outside of the feeding shaft and in conjunction with the lower roller groove, upper roller groove, front baffle and rear baffle set in the unidirectional track to make the feeding shaft form a loop during the feeding back and forth process. When the roller passes through the lower roller groove, the top of the baffle rod on the feeding shaft is in a high position, pushing the workpiece to be conveyed to the laser cutting table. The feeding shaft is in a normal axial movement feeding state. When the roller returns through the rear baffle, it rolls to the upper roller groove under the action of the rear baffle. Due to the change in the height position of the roller, and the flexible connection of the feeding shaft through the synchronous belt, the rotational freedom of the feeding shaft cannot be restricted. At this time, the feeding shaft rotates inward, that is, the feeding shaft can move and rotate axially at the same time. After rotation, the height of the top of the baffle rod is lower than the height of the workpiece, which makes it easy for the feeding shaft to return to the starting position.

[0023] (7) By setting up grippers, lifting rods, pressing springs, pressing rods, pressing blocks, etc., the present invention can realize that when the feeding shaft feeds material, the lifting part is at the upper limit position and presses against the pressing block, and the grippers are in the loose state, which is convenient for feeding. When the feeding shaft returns, the lifting part is at the lower limit position and disengages from the pressing block, and the grippers clamp the workpiece under the action of the pressing spring.

[0024] (8) The present invention resets the front and rear baffles by means of a reset torsion spring, and at the same time limits the rotating block connected to the reset torsion spring by means of a limiting block set on the unidirectional track, so as to ensure that the rotation amplitude of the front and rear baffles is within the control range.

[0025] (9) The present invention uses workpiece detection sensors set at various locations to work in conjunction with motors to better complete workpiece loading operations. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of this invention;

[0027] Figure 2 A schematic diagram of the guide groove and its internal components in this invention;

[0028] Figure 3 This is a schematic diagram of the structure of components such as the feeding shaft, rollers, and unidirectional track in this invention;

[0029] Figure 4 This is a schematic diagram of the driving component in this invention;

[0030] Figure 5This is a schematic diagram of the structure of components such as the outer unidirectional track, the limiting block, and the workpiece detection sensor of the guide assembly in this invention;

[0031] Figure 6 A schematic diagram of the travel loop of the roller from the initial state to the return state in this invention;

[0032] Figure 7 A schematic diagram showing the positions of the feeding shaft, the baffle rod, and the rollers on it during the feeding state in this invention;

[0033] Figure 8 This is a schematic diagram showing the position of the feeding shaft and its stop bar and rollers in the return state of the present invention;

[0034] In the diagram: 1. Guide assembly; 2. Drive assembly; 3. Sliding adjustment assembly; 4. Guide groove; 5. Feed shaft; 6. Linear bearing; 7. First synchronous belt; 8. Drive wheel; 9. Driven wheel; 10. One-way track; 11. Roller; 12. Front baffle; 13. Return torsion spring; 14. Limit block; 15. Stop bar; 16. Pressure spring; 17. Gripper; 18. Pressure block; 19. Lifting rod; 20. Motor; 21. Small pulley; 22. Large pulley; 23. Second synchronous belt; 24. Splined shaft; 25. Front base plate; 26. Rear base plate; 27. Slide rail 28. Slider; 29. ​​First locking handle; 30. Stacking rod; 31. Second locking handle; 32. Inner side plate; 33. Feeding step; 34. Stacking device; 35. Workpiece; 36. Divider plate; 37. Lower roller groove; 38. Upper roller groove; 39. Long hole in inner side plate; 40. Stacking device mounting step; 41. Stacking rod mounting block; 42. Sliding groove; 43. Rotating rod; 44. Rotating block; 45. Stop rod fixing screw; 46. Clamping rod; 47. Workpiece detection sensor; 48. Waist-shaped adjustment hole; 49. Rear baffle; 50. Spline nut. Detailed Implementation

[0035] 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.

[0036] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “inner,” “outer,” “horizontal,” and “vertical” as used in this patent application specification and claims are used only to indicate relative positional relationships; these relative positional relationships change accordingly when the absolute position of the described object changes. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. All aspects not detailed herein are well-known to those skilled in the art. Example 1

[0037] like Figures 1-8 As shown, the present invention discloses an automatic laser cutting feeding device, comprising a drive assembly 2 and two guide assemblies 1 symmetrically arranged on the left and right sides; each guide assembly 1 includes a U-shaped guide groove 4, the openings of the two guide grooves 4 being arranged opposite each other, and a stacking device 34 for batch placement of workpieces being provided on the same side of the top of the two guide grooves 4; a feeding step 33 is provided at the top edge of each guide groove 4, and a feeding shaft 5 is provided in the middle of its inner side through two linear bearings 6, with a driving wheel 8 and a driven wheel 9 respectively provided at both ends of its inner side, the driving wheel 8 and the driven wheel 9 being connected by a first synchronous belt 7, both ends of the first synchronous belt 7 being simultaneously connected to both ends of the feeding shaft 5; the drive assembly 2 includes a motor 2 installed at one end of the driving wheel 8 of one of the guide assemblies 1. 0. The motor 20 can be a stepper motor or the like. The output end of the motor 20 is provided with a small pulley 21. The two drive wheels 8 of the guide components 1 are connected by a spline shaft 24 and a spline nut 50. The spline shaft 24 is located at one end of the motor 20 and is provided with a large pulley 22. The small pulley 21 and the large pulley 22 are connected by a second synchronous belt 23. The motor 20 drives the small pulley 21 to rotate. The small pulley 21 drives the drive wheel 8 on the same side of the motor 20 to rotate through the second synchronous belt 23. The drive wheel 8 on this side drives the drive wheel 8 on the other side to rotate synchronously through the spline shaft 24. The two drive wheels 8 drive the corresponding driven wheels 9 to rotate synchronously through the first synchronous belt 7. At the same time, the feeding shaft 5 connected to the first synchronous belt 7 can move synchronously forward or backward.

[0038] In this embodiment, the feeding shaft 5 is evenly spaced with multiple baffles 15, preferably three, on the side closer to the opening edge of the guide groove 4. The interval between adjacent baffles 15 is larger than the size of the workpiece 35 to be pushed. A roller 11 is provided in the middle of the other side of the feeding shaft 5 opposite to the baffles 15. The roller 11 can also be a ball bearing. The guide groove 4 has an opening in the middle and a one-way track 10 is provided outside the opening. The one-way track 10 has two ends on its inner side. The long, open slot has a horizontal lower inner wall surface and an upper inner wall surface that can be cap-shaped, horizontal, or other shapes to facilitate roller movement. A partition plate 36 is provided in the middle of the slot, dividing it into a lower roller slot 37 and an upper roller slot 38 for the roller 11 to travel on and for limiting its movement. A front baffle 12 and a rear baffle 49 are rotatably connected to both ends of the partition plate 36. The front baffle 12 is located on one side of the stacking device 34. The baffles 49 are respectively equipped with reset torsion springs 13 so that their front ends abut against the upper and lower inner wall surfaces of the unidirectional track 10. The roller 11 is placed in the lower roller groove 37 or the upper roller groove 38. The two baffles enable the roller 11 to move in one direction. When the roller 11 is placed in the lower roller groove 37, it is ensured that the roller 11 can roll horizontally in the lower roller groove 37, the feeding shaft 5 does not rotate, and the top of the baffle rod 15 is at the upper limit position. The upper limit position does not exceed the top height of the bottom layer of workpieces 35 placed in the batch in the stacking device 34. The upper limit position is preferably 0.6-0.8 times the height of the bottom layer of workpieces to facilitate pushing the workpieces. When the roller 11 is placed in the upper roller groove 38, the height of the roller 11 changes. The feeding shaft 5 is flexibly connected by the first synchronous belt 7 and does not restrict the degree of rotation freedom. Therefore, it rotates inward, moving the top of the baffle rod 15 from the upper limit position to the lower limit position. The lower limit position is lower than the bottom of the workpiece to facilitate the return.

[0039] In order to protect the components in the guide groove 4, an inner side plate 32 is installed at the opening of the guide groove 4. The inner side plate 32 has an inner side plate elongated hole 39 and other notches at the position corresponding to the feeding shaft 5. Each of the material stop rods 15 extends out from the inner side plate elongated hole 39.

[0040] In application, the feeding method of the above-mentioned automatic laser cutting feeding device is achieved by the drive component 2 to realize the feeding stroke and return stroke. Before feeding, the roller 11 installed on the feeding shaft 5 of the automatic laser cutting feeding device is positioned in the roller groove 37 under the unidirectional track 10, corresponding to the position of the front baffle 12, so that the outermost baffle 15 on the feeding shaft 5 is located in front of the stacking device 34; at least one workpiece 35 is placed on the stacking device 34, the drive component 2 is started and drives the two drive wheels 8 of the guide components 1 to rotate synchronously, and the feeding shaft 5 is driven to move axially forward through the first synchronous belt 7. When the top of the stop rod 15 on the feeding shaft 5 is at its upper limit position, the top of the stop rod 15 pushes the workpiece 35 forward within the feeding step 33 of the guide groove 4. The roller 11 on the other side of the feeding shaft 5 is limited by the lower roller groove 37 and moves forward. When the roller 11 moves to the rear stop plate 49, it is pushed open by the roller 11 and passes through the rear stop plate 49. The rear stop plate 49 is reset under the action of the return torsion spring 13. At this time, the workpiece 35 is pushed to the next position, realizing the feeding... During the feeding process, each baffle bar 15 can push one workpiece 35, enabling the feeding of multiple workpieces. During the return stroke, the drive assembly 2 drives the two drive wheels 8 to rotate synchronously in opposite directions, causing the feeding shaft 5 to move axially backward. Through the action of the rear baffle 49, the roller 11 moves upward from the rear baffle 49 into the upper roller groove 38. Simultaneously, the feeding shaft 5 rotates inward due to the change in the height of the roller 11, causing the baffle bar 15 to tilt inward and its top to be at a low position. At the lower limit position of the workpiece 35, when the roller 11 moves to the front baffle 12 and squeezes open the front baffle 12 to enter the lower roller groove 37, the feeding shaft 5 rotates outward to return to its initial state due to the change in the height position of the roller 11. At this time, the baffle rod 15 returns to its upper limit position. In the entire feeding and return process, the roller 11 first moves in the lower roller groove 37 and then enters the upper roller groove 38 to return, forming a loop. At this time, the next workpiece 35 can be pushed by the drive component 2, and the above stroke is repeated.

[0041] In this embodiment, at least one workpiece detection sensor 47 is provided on the stacking device 34 and the guide groove 4 respectively. These sensors can be interlocked with the drive component 2 to locate the position of the feeding shaft 5 and the position and state of the workpiece to be fed, and to control the motor 20 accordingly based on the position.

[0042] In this embodiment, the front baffle 12 and the rear baffle 49 are fan-shaped on the sides, which facilitates the vertical movement of the roller 11 within the upper and lower roller grooves 37 and 38. Example 2

[0043] Based on Embodiment 1, the automatic laser cutting feeding device of the present invention further includes a sliding adjustment component 3. The sliding adjustment component 3 includes a front base plate 25 and a rear base plate 26 respectively disposed on the front and rear sides of the bottom of the two guide components 1. A slide rail 27 is disposed on the same side of the front base plate 25 and the rear base plate 26, and a slider 28 is slidably connected to the slide rail 27. A first locking handle 29 is disposed on the front and rear sides of one of the guide components 1, and the first locking handle 29 is connected to the two sliders 28 respectively. The front and rear sides of the bottom of the other guide component 1 are respectively connected to the front base plate 25. 5 and the rear base plate 26 are fixedly connected; the stacking device 34 includes stacking device mounting steps 40 respectively opened on the top of the two guide grooves 4, the stacking device mounting steps 40 are connected to the feeding steps 33, the stacking device mounting steps 40 are provided with sliding grooves 42 along the length direction, and stacking rod mounting blocks 41 are fixedly and slidably arranged on one side of the stacking device mounting steps 40 and on the sliding grooves 42 respectively, stacking rods 30 are fixedly installed on the stacking rod mounting blocks 41, and a second locking handle 31 is provided on the stacking rod mounting blocks 41 slidably arranged in the sliding grooves 42. In this embodiment, the sliding adjustment component 3 is used to adjust the length of the workpiece 35. When the length of the workpiece 35 changes, the first locking handles 29 on the front base plate 25 and the rear base plate 26 are lifted respectively, so that the sliders 28 on the two base plates can slide on their respective slide rails 27. After adjusting the distance between the two guide components 1 to a suitable distance according to the length of the workpiece 35, the two first locking handles 29 are pressed respectively to lock the movable guide component 1 on the front base plate 25 and the rear base plate 26. When the width of the workpiece 35 changes, it is adjusted by the stacking device 34. The two second locking handles 31 are lifted respectively, so that the two stacking rod mounting blocks 41 can slide back and forth on their respective sliding grooves 42. After adjusting the distance between the slidable stacking rod 30 and the fixed stacking rod 30 to a suitable distance according to the width of the workpiece 35, the two second locking handles 31 are pressed respectively to lock the two stacking rods. Through the design of the above structure, the needs of loading workpieces of different sizes can be met. Example 3

[0044] Based on Embodiment 2, the stacking rod 30 is L-shaped, with at least one waist-shaped adjustment hole 48 at its lower part. The stacking rod is detachably and fixed to the stacking rod mounting block 41 via screws at the waist-shaped adjustment hole 48. In this embodiment, the L-shaped stacking rod 30 facilitates the limiting of the workpiece 35 in four directions. The waist-shaped adjustment hole 48 allows adjustment of the distance between the bottom of the stacking rod 30 and the feeding step 33 to accommodate workpieces of different thicknesses. Through the limiting of each stacking rod 30, the workpiece falls precisely onto the feeding step 33, and then, through the stop rod 15 on the feeding shaft 5, the workpieces can be pushed one after another. Example 4

[0045] Based on any one of embodiments 1-3, the present invention provides an automatic laser cutting feeding device, wherein the rear ends of the front baffle 12 and the rear baffle 49 are both connected to a rotating rod 43, the rotating rod 43 passes through a one-way track 10 and is connected to a rotating block 44 at its outer end; a reset torsion spring 13 is disposed on the rotating rod 43, one end of which is fixed to the one-way track 10 and the other end is fixed to the rotating block 44; limit blocks 14 are respectively provided on the one-way track 10 on both sides of the rotating block 44, and the front baffle and the rear baffle are limited by the limit blocks 14. Example 5

[0046] Based on any one of embodiments 1-4, the automatic laser cutting feeding device of the present invention further includes a clamping device. Each of the stop rods 15 is installed on the side of the feeding shaft 5 by a stop rod fixing screw 45. A lifting rod 19 is commonly provided on each stop rod fixing screw 45. A gripper 17 is provided at the top middle position of the guide groove 4 by a clamping spring 16. A clamping rod 46 is connected to the gripper 17. The clamping rod 46 is movably disposed through the guide groove 4. A clamping block 18 is provided at the bottom end of the clamping rod 46. The clamping block 18 corresponds to the lifting rod 19 and is coupled to it in a rotational motion. When the rollers on the feeding shaft push the workpiece from the initial position to the end position, the top of the stop bar is at the upper limit position. At this time, the lifting rod 19 presses against the clamping rod 46, and then the clamping rod 46 presses against the clamping spring 16, so that the gripper 17 is in a loose state, which facilitates the pushing of the workpiece on the feeding step. When the feeding shaft returns, the feeding shaft rotates inward, the lifting rod disengages from the clamping block 18, the clamping spring acts on the gripper, and the gripper clamps the workpiece.

Claims

1. An automatic feeding device for laser cutting, characterized in that: The device includes a drive assembly (2) and two guide assemblies (1) arranged symmetrically on the left and right. Each guide assembly (1) includes a guide groove (4). The top of the two guide grooves (4) is provided with a stacking device (34) on the same side. A feeding step (33) is provided at the top edge of each guide groove (4). A feeding shaft (5) is provided in the middle of its inner side through a linear bearing (6). The two ends of its inner side are respectively provided with a driving wheel (8) and a driven wheel (9) connected by a first synchronous belt (7). The two ends of the first synchronous belt (7) are simultaneously connected to the two ends of the feeding shaft (5). A plurality of baffle rods (15) are evenly spaced on one side of the feeding shaft (5), and a roller (11) is provided in the middle of the other side. A slot is provided in the middle of the guide groove (4), and a one-way valve is provided on the outside of the slot. Track (10); The inner side of the unidirectional track (10) is provided with a long groove with openings at both ends. A partition plate (36) is provided in the middle of the long groove and divides the long groove into a lower roller groove (37) and an upper roller groove (38); The two ends of the partition plate (36) are respectively rotatably connected to a front baffle (12) and a rear baffle (49). The front baffle (12) is located on one side of the stacking device (34). The front baffle (12) and the rear baffle (49) are respectively connected to the upper and lower inner walls of the long groove on the unidirectional track (10) by setting a reset torsion spring (13); The drive assembly (2) is connected to the drive wheels (8) on the two guide assemblies (1); The roller (11) is placed in the lower roller groove (37) or the upper roller groove (38).

2. The automatic feeding device for laser cutting according to claim 1, characterized in that: It also includes a sliding adjustment assembly (3), which includes a front base plate (25) and a rear base plate (26) respectively provided on the front and rear sides of the bottom of the two guide assemblies (1). A slide rail (27) is provided on the same side of the front base plate (25) and the rear base plate (26). A slider (28) is slidably connected on the slide rail (27). A first locking handle (29) is provided on the front and rear sides of one of the guide assemblies (1) and is connected to the two sliders (28) at the first locking handle (29). The front and rear sides of the bottom of the other guide assembly (1) are respectively connected to the front base plate (25). The stacking device (34) is fixedly connected to the rear base plate (26); the stacking device includes stacking device mounting steps (40) respectively opened on the top of the two guide grooves (4), the stacking device mounting steps (40) are provided with sliding grooves (42) along the length direction, and stacking rod mounting blocks (41) are fixedly and slidably set on one side of the stacking device mounting steps (40) and on the sliding grooves (42), respectively. A stacking rod (30) is fixedly installed on the stacking rod mounting blocks (41), and a second locking handle (31) is provided on the stacking rod mounting blocks (41) slidably set on the sliding grooves (42).

3. The automatic feeding device for laser cutting according to claim 2, characterized in that: The stacking rod (30) is L-shaped, and at least one waist-shaped adjustment hole (48) is provided at its lower part. The stacking rod is detachably installed and fixed to the stacking rod mounting block (41) at the waist-shaped adjustment hole (48).

4. The automatic feeding device for laser cutting according to claim 1, characterized in that: The front baffle (12) and the rear baffle (49) are fan-shaped on the sides.

5. The automatic feeding device for laser cutting according to claim 1, characterized in that: The rear ends of the front baffle (12) and the rear baffle (49) are both connected to a rotating rod (43). The rotating rod (43) passes through the one-way track (10) and is connected to a rotating block (44) at its outer end. The reset torsion spring (13) is set on the rotating rod (43), with one end fixed to the one-way track (10) and the other end fixed to the rotating block (44). Limiting blocks (14) are respectively set on the one-way track (10) on both sides of the rotating block (44).

6. The automatic feeding device for laser cutting according to claim 1, characterized in that: The guide groove (4) is fitted with a matching inner side plate (32). The inner side plate (32) has an inner side plate elongated hole (39) at a position corresponding to the feeding shaft (5). Each of the material stop rods (15) extends out from the inner side plate elongated hole (39).

7. The automatic feeding device for laser cutting according to claim 1, characterized in that: Each of the aforementioned baffle rods (15) is installed on the side of the feeding shaft (5) by baffle rod fixing screws (45). Each of the aforementioned baffle rod fixing screws (45) is provided with a lifting rod (19). A clamping claw (17) is provided at the top middle position of the guide groove (4) by a clamping spring (16). A clamping rod (46) is connected to the clamping claw (17). The clamping rod (46) is movably disposed on the guide groove (4). A clamping block (18) is provided at the bottom end of the clamping rod (46). The clamping block (18) corresponds to the lifting rod (19).

8. The automatic feeding device for laser cutting according to claim 1, characterized in that: At least one workpiece detection sensor (47) is provided on the stacking device (34) and the guide groove (4).

9. The automatic feeding device for laser cutting according to claim 1, characterized in that: The drive assembly (2) includes a motor (20) installed on one end of the drive wheel (8) of one of the guide assemblies (1). The output end of the motor (20) is provided with a small pulley (21). The drive wheels (8) of the two guide assemblies (1) are connected by a spline shaft (24) and a spline nut (50). The spline shaft (24) is provided with a large pulley (22) at one end of the motor (20). The small pulley (21) and the large pulley (22) are connected by a second synchronous belt (23).

10. A feeding method for the automatic laser cutting feeding device according to any one of claims 1-9, characterized in that: Before the automatic laser cutting feeding device starts feeding, the roller (11) installed on the feeding shaft (5) of the automatic laser cutting feeding device is positioned in the roller groove (37) under the unidirectional track (10) corresponding to the front baffle (12), so that the outermost baffle rod (15) on the feeding shaft (5) is located in front of the stacking device (34); at least one workpiece (35) is placed on the stacking device (34), the drive assembly (2) is started and the two guide assemblies (1) drive the active wheels ( 8) Synchronous rotation, the feeding shaft (5) is driven to move forward axially through the first synchronous belt (7). At this time, the top of the stop bar (15) on the feeding shaft (5) is at the upper limit position. The top of the stop bar (15) pushes the workpiece (35) forward in the feeding step (33) of the guide groove (4). The roller (11) on the other side of the feeding shaft (5) is limited by the lower roller groove (37) and moves forward. When the roller (11) moves to the rear baffle (49), the roller ( 11) The workpiece (35) is pushed open and passes through the rear baffle (49), which is reset by the reset torsion spring (13). At this time, the workpiece (35) is pushed to the next position. The two drive wheels (8) are driven to rotate synchronously in opposite directions by the drive assembly (2), which drives the feeding shaft (5) to move axially backward. Through the action of the rear baffle (49), the roller (11) enters the upper roller groove (38) from the rear baffle (49). At the same time, the feeding shaft (5) moves upward due to the height of the roller (11). The change in position causes an inward rotation, causing the stop bar (15) to tilt inward and its top to be below the lower limit position of the workpiece (35). When the roller (11) reaches the front baffle (12) and pushes open the front baffle (12) to enter the lower roller groove (37), the feeding shaft (5) rotates outward to return to its initial state due to the change in the height position of the roller (11). At this time, the stop bar (15) returns to its upper limit position, and the next workpiece (35) can be pushed by the drive assembly (2) in the above-mentioned stroke.

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