An anti-collision resetting device for three-dimensional laser cutting

Abstract

The present invention relates to the field of laser cutting, and specifically to an anti-collision reset device for three-dimensional laser cutting, which is arranged on a driving mechanism for driving a laser head to move, the driving mechanism having a driving block on which the laser head is arranged, and the anti-collision reset device comprising a sleeve fixedly arranged on the driving block, an anti-collision strip movably arranged around the sleeve, and a reset mechanism, the reset mechanism comprising an elastic connector fixedly arranged between the laser head and the sleeve, and a locking assembly drivingly connected between each anti-collision strip and the laser head. The present invention protects the laser head through the anti-collision strip, thereby avoiding direct contact between the laser head and the welded workpiece. After the anti-collision strip collides with the welded workpiece, the locking assembly quickly releases the constraint on the laser head, so that the laser head quickly retracts into the sleeve and resets to a non-working state of the laser head, thereby avoiding the risk of damage to the laser head due to collision.

Description

Technical Field

[0001] The invention relates to the field of laser cutting, and in particular to an anti-collision resetting device for three-dimensional laser cutting. Background Art

[0002] During the 3D laser cutting process, the laser head may collide with the workpiece due to the complex shape of the workpiece being welded, inaccurate positioning or improper operation. The existing technology monitors the distance between the laser head and the workpiece being welded in real time through a displacement sensor installed on the laser head. Once abnormal proximity or contact is detected, the movement of the laser head is stopped immediately. However, this method has a slow response speed and cannot immediately stop the movement of the laser head at the moment of collision, resulting in the possibility of damage to the laser head.

[0003] A laser cutting head and a laser cutting device thereof, which are currently disclosed in China with a patent authorization announcement number of CN114273799B, include a nozzle block, a laser hole is provided in the nozzle block, an air inlet cylinder is provided on the nozzle block, and a first sealing device is provided between the nozzle block and the air inlet cylinder, an air inlet hole is provided on the air inlet cylinder, a condenser seat is provided on the air inlet cylinder, a condenser is fixedly provided at the bottom of the condenser seat, a focusing tube is provided on the condenser seat, and a second sealing device is provided between the condenser seat and the focusing tube; a plurality of operating holes are provided on the side of the air inlet cylinder, anti-collision plates are movably inserted in the operating holes, a first through hole and a second through hole are respectively provided on the anti-collision plates, a lifting switch is fixedly provided in the operating hole, and the anti-collision plate can trigger the lifting switch when moving, a first indicating rod and a second indicating rod are fixedly provided on the outer side of the nozzle block, and the first indicating rod can pass through the first through hole, and the second indicating rod can pass through the second through hole.

[0004] According to the above patent, when the laser cutting head in the above patent is stationary or in motion, if the material or other objects hit the cutting head, it will first hit the anti-collision plate and push the anti-collision plate inward. Until the lifting switch is triggered and started, the external lifting device such as a cylinder will quickly move the cutting head upward and retract it as a whole to avoid hard collision and effectively protect the cutting head. Although the lifting switch responds quickly when a collision occurs, the actual response time may be longer due to the delay in electrical signal transmission. This may cause the cutting head to still be subjected to some impact force in the early stage of the collision, thereby affecting its service life and accuracy. Therefore, there is a need for a three-dimensional laser cutting anti-collision reset device that can effectively protect the cutting head from impact and automatically reset the cutting head under normal working conditions. Summary of the invention

[0005] In view of the problems existing in the existing technology, an anti-collision and resetting device for three-dimensional laser cutting is provided. The laser head is protected by an anti-collision bar to avoid direct contact between the laser head and the workpiece to be welded. When the anti-collision bar collides with the workpiece to be welded, the locking assembly quickly releases the constraint on the laser head, allowing the laser head to quickly retract into the sleeve and reset to a non-working state, thereby avoiding the risk of damage to the laser head due to collision.

[0006] In order to solve the problems of the prior art, the present invention provides an anti-collision resetting device for three-dimensional laser cutting, which is arranged on a driving mechanism for driving a laser head to move, the driving mechanism having a driving block on which the laser head is arranged, the anti-collision resetting device comprising a sleeve fixedly arranged on the driving block and sleeved with the laser head, an anti-collision strip movably arranged around the sleeve, and a resetting mechanism for enabling the laser head to be moved upward and retracted into the sleeve as a whole when the anti-collision strip collides with a workpiece to be welded, the resetting mechanism comprising an elastic connector fixedly arranged between the laser head and the sleeve and a locking assembly transmission-connected between each anti-collision strip and the laser head, when the anti-collision strip does not collide with the workpiece to be welded, the laser head is fixed by the locking assembly, at which time the elastic connector is in a state of being acted upon by an external force, so that the emitting part of the laser head extends out of the sleeve and is in a normal working state, when the anti-collision strip collides with the workpiece to be welded, the locking assembly releases the fixation of the laser head, at which time the elastic connector is in a state of being restored to a natural state, so that the emitting part of the laser head retracts into the sleeve and is in a protected state.

[0007] Preferably, the locking assembly includes a holder fixedly provided on the laser head and a hook movably provided on the driving block, the holder having a slot for accommodating the hook, the hook being able to move on the driving block along an axial direction perpendicular to the sleeve, a first compression spring being fixedly provided between the hook and the driving block, and when the first compression spring is in an uncompressed state, the holder is in a fixed state restricted on the driving block by the hook.

[0008] Preferably, the locking assembly also includes a trigger structure capable of driving the hook to move outward, the trigger structure having a push rod cooperating with the hook and a pressure piece cooperating with the anti-collision strip, a ring is provided on the sliding sleeve of the sleeve, the push rod is fixedly connected to the ring, the pressure piece is movably connected to the ring, the upper end of the push rod and the lower end of the hook respectively have contacting fitting surfaces, when the anti-collision strip collides with the welded workpiece and causes the pressure piece to be compressed, the ring is in a state of moving upward under the action of the pressure piece, and the hook is in a state of translating outward at the same time under the action of the push rod, so that the base is released.

[0009] Preferably, a rubber sleeve into which the emitting part of the laser head can enter is fixedly provided at the lower end of the sleeve, and the pressure-bearing part is arranged between the anti-collision strip and the rubber sleeve.

[0010] Preferably, the pressure-bearing part has a first connecting rod and a second connecting rod hinged to each other, the free end of the first connecting rod is hinged on the rubber sleeve, and the free end of the second connecting rod is hinged on the ring, and when the hinge point between the first connecting rod and the second connecting rod is squeezed by the anti-collision strip, the ring is in a state of being pushed upward.

[0011] Preferably, a second compression spring is fixedly connected between the collar and the sleeve, and when the anti-collision strip does not collide with the welded workpiece, the second compression spring is in a state of not being acted upon by external force.

[0012] Preferably, the two ends of the anti-collision strip extend toward the upper end and the lower end of the sleeve respectively, the upper end of the anti-collision strip is rotatably connected to the sleeve, and the sleeve is provided with an axle seat for the end of the anti-collision strip to be rotatably connected, and the lower half of the anti-collision strip and the side facing the pressure-bearing part are provided with a buffer pad in contact with it.

[0013] Preferably, a stopper is fixedly provided on the shaft seat and located on the outer side of the anti-collision strip to prevent the anti-collision strip from freely swinging in a direction away from the pressure-bearing member.

[0014] Preferably, the elastic connecting member has a first return spring and a second return spring, and the first return spring and the second return spring are respectively arranged in the upper half and the lower half of the sleeve. When the laser head moves upward as a whole into the sleeve, the first return spring is in a state of gradually returning from a compressed state, and the second return spring is in a state of gradually returning from a stretched state.

[0015] Preferably, the reset mechanism further comprises a pusher for pushing the laser head downward when the laser head is working normally so as to cause the emitting part to extend out of the sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention protects the laser head by the anti-collision strip, thereby avoiding direct contact between the laser head and the welded workpiece.

[0018] When the anti-collision strip comes into contact with the workpiece being welded or other obstacles, the locking assembly quickly releases the constraint on the laser head, so that the laser head quickly retracts into the sleeve, avoiding direct hard contact.

[0019] Compared with the existing technology of detecting collisions through sensors, the reaction time is shortened, and the risk of laser head damage due to collision is greatly reduced. It not only reduces the downtime caused by collisions, but also improves production efficiency and ensures the continuity and stability of the cutting process of the welded workpiece.

[0020] 2. The present invention uses the coordinated work of the hook and the first compression spring, so that when a collision occurs between the anti-collision strip and the welded workpiece, the locking assembly can quickly drive all the hooks to overcome the force of the first compression spring and move outward, so that each hook quickly moves away from the holder. Under the action of the elastic connector, the laser head quickly enters the sleeve, effectively protecting the laser head from damage.

[0021] After the collision is resolved, the laser head is pushed downward, so that the holder guides the hook outward through the inclined surface on the hook. When the holder completely passes the hook, the first compression spring pushes the hook back to its original position, ensuring that the laser head quickly returns to the working state, ensuring the continuity and stability of the operation.

[0022] 3. The present invention uses the cooperation of the trigger structure and the hook, so that after the anti-collision strip collides with the welded workpiece, the collision force is quickly transmitted to the pressure-bearing part through the anti-collision strip.

[0023] When the pressure piece is subjected to external force, the force is quickly transferred to the collar. As the collar moves upward, all the ejector pins connected to the collar move upward. Each ejector pin transfers force to the corresponding hook, causing all hooks to quickly move outward and release the holder together. This greatly reduces the reaction time and effectively avoids direct hard contact between the laser head and the workpiece being welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The three-dimensional structure diagram of an anti-collision reset device for three-dimensional laser cutting of the present invention is shown in FIG. Figure 1 .

[0025] Figure 2 The three-dimensional structure diagram of an anti-collision reset device for three-dimensional laser cutting of the present invention is shown in FIG. Figure 2 .

[0026] Figure 3 It is a partial plan cross-sectional view of an anti-collision resetting device for three-dimensional laser cutting according to the present invention.

[0027] Figure 4 It is a partial three-dimensional structural cross-sectional view of an anti-collision resetting device for three-dimensional laser cutting of the present invention.

[0028] Figure 5 yes Figure 3 An enlarged schematic diagram of point A.

[0029] Figure 6 It is a planar cross-sectional view of an anti-collision strip and a pressure-bearing member in an anti-collision resetting device for three-dimensional laser cutting according to the present invention.

[0030] Figure 7 yes Figure 6 An enlarged schematic diagram of point B.

[0031] Figure 8 It is a planar cross-sectional view of a hook and a seat in an anti-collision resetting device for three-dimensional laser cutting according to the present invention.

[0032] Fig. 9 yes Figure 8 Enlarged schematic diagram of point C.

[0033] Fig.10 yes Figure 8 Enlarged schematic diagram of point D.

[0034] The numbers in the figure are: 1, laser head; 11, upper ball; 12, lower ball; 2, driving block; 3, sleeve; 31, collar; 311, second compression spring; 32, rubber sleeve; 33, shaft seat; 331, stopper; 4, anti-collision strip; 41, buffer pad; 5, elastic connector; 51, first return spring; 52, second return spring; 6, locking assembly; 61, seat; 62, hook; 621, first compression spring; 63, push rod; 64, pressure piece; 641, first connecting rod; 642, second connecting rod; 7, pusher; 71, lower magnetic ring; 72, upper magnetic ring. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] See also Figure 1-Figure 4 As shown, an anti-collision reset device for three-dimensional laser cutting is arranged on a driving mechanism for driving a laser head 1 to move, the driving mechanism has a driving block 2 on which the laser head 1 is arranged, the anti-collision reset device includes a sleeve 3 fixedly arranged on the driving block 2 and sleeved with the laser head 1, an anti-collision strip 4 movably arranged around the sleeve 3, and a reset mechanism for enabling the laser head 1 to be moved upward and retracted into the sleeve 3 as a whole when the anti-collision strip 4 collides with the welded workpiece, the reset mechanism includes an elastic connector 5 fixedly arranged between the laser head 1 and the sleeve 3 and a locking assembly 6 transmission-connected between each anti-collision strip 4 and the laser head 1, when the anti-collision strip 4 does not collide with the welded workpiece, the laser head 1 is fixed by the locking assembly 6, at which time the elastic connector 5 is in a state of being acted upon by an external force, so that the emitting part of the laser head 1 extends out of the sleeve 3 and is in a normal working state, when the anti-collision strip 4 collides with the welded workpiece, the locking assembly 6 releases the fixation of the laser head 1, at which time the elastic connector 5 is in a state of being restored to a natural state, so that the emitting part of the laser head 1 is retracted into the sleeve 3 and is in a protected state.

[0037] The driving block 2 of the driving mechanism moves along the X, Y and Z axis directions, and the specific driving process of the driving mechanism is not shown in the figure.

[0038] When the anti-collision strip 4 comes into contact with the workpiece being welded or other obstacles, the instantaneous collision force will trigger the quick response of the locking assembly 6. The locking assembly 6 originally fixes the laser head 1, keeping it in the working state of extending out of the sleeve 3, ensuring the precise focusing and cutting operation of the laser head 1. However, at the moment of collision, the locking assembly 6 will automatically release the constraint on the laser head 1 and release the energy stored in the elastic connector 5. At this time, the elastic connector 5 quickly recovers from the compressed state to its natural length, pushing the laser head 1 to move upward as a whole, and quickly retracting into the sleeve 3, avoiding continued impact to damage the laser head 1.

[0039] When the collision is resolved, the laser head 1 is pressed downward by applying pressure to the laser head 1, so that the laser head 1 is smoothly repositioned to the initial working position. The locking assembly 6 then returns to its original state and re-secures the laser head 1 to ensure that it returns to normal working state. In the whole process, downtime and maintenance costs caused by accidental collisions are minimized.

[0040] See also Figure 3 , Figure 4 and Figure 8-Figure 10 As shown, the locking assembly 6 includes a base 61 fixedly arranged on the laser head 1 and a hook 62 movably arranged on the driving block 2, the base 61 has a slot for accommodating the hook 62, the hook 62 can move on the driving block 2 along the axial direction perpendicular to the sleeve 3, and a first compression spring 621 is fixedly provided between the hook 62 and the driving block 2. When the first compression spring 621 is in an uncompressed state, the base 61 is in a fixed state restricted on the driving block 2 by the hook 62.

[0041] The hook 62 has an inclined surface that can guide the holder 61 to move below the hook 62 when the holder 61 moves downward.

[0042] When the locking assembly 6 is in a normal working state, the first compression spring 621 is in an uncompressed state, and it applies an inward pressure to the hook 62, so that the hook 62 tightly clamps the holder 61. In this state, the holder 61 is firmly restricted on the driving block 2 by the hook 62, ensuring that the emitting part of the laser head 1 can stably extend out of the sleeve 3 to perform precise cutting operations.

[0043] When the anti-collision strip 4 contacts the welded workpiece or other obstacles, the collision force will be quickly transmitted to the locking assembly 6. At this time, the external force on the hook 62 exceeds the elastic force of the first compression spring 621, and the hook 62 will move outward along the axis direction perpendicular to the sleeve 3 on the driving block 2, thereby detaching from the holder 61. As the hook 62 detaches from the holder 61, the energy stored in the elastic connector 5 is quickly released, pushing the laser head 1 to move upward as a whole and quickly retracting into the sleeve 3, thereby avoiding damage to the laser head 1 caused by collision.

[0044] When the collision is resolved, the laser head 1 moves downward again under the drive of external force, and the holder 61 moves downward with the laser head 1. The holder 61 pushes the hook 62 along the inclined surface on the hook 62. At this time, the hook 62 is pushed outward, and the first compression spring 621 is in a compressed state. After the holder 61 completely passes the hook 62, it is pushed back to the position of the holder 61 by the first compression spring 621 again under the action of the first compression spring 621, and the holder 61 is re-stuck to restore to the initial fixed state. Ensure that the emitting part of the laser head 1 extends out of the sleeve 3, and continue the cutting operation.

[0045] See also Figure 3-Figure 10 As shown, the locking assembly 6 also includes a trigger structure capable of driving the hook 62 to move outward, the trigger structure having a push rod 63 cooperating with the hook 62 and a pressure piece 64 cooperating with the anti-collision strip 4, a sleeve 3 is provided with a sliding sleeve with a ring 31, the push rod 63 is fixedly connected to the ring 31, the pressure piece 64 is movably connected to the ring 31, the upper end of the push rod 63 and the lower end of the hook 62 respectively have contacting fitting surfaces, when the anti-collision strip 4 collides with the welded workpiece and causes the pressure piece 64 to be compressed, the ring 31 is in an upward moving state under the action of the pressure piece 64, and the hook 62 is simultaneously in an outward translation state under the action of the push rod 63, so that the holder 61 is released.

[0046] When the anti-collision strip 4 collides with the welded workpiece, the collision force is quickly transmitted to the pressure piece 64 of the locking assembly 6. After the pressure piece 64 is acted upon by an external force, it transmits the force to the collar 31, so that the collar 31 moves upward under the force of the pressure piece 64. As the collar 31 moves upward, the push rod 63 also moves upward.

[0047] The design of the mating surface between the upper end of the push rod 63 and the lower end of the hook 62 enables the push rod 63 to exert an outward thrust on the hook 62 while moving upward. This thrust overcomes the elastic force of the first compression spring 621, causing the hook 62 to translate outward on the driving block 2 along the axis direction perpendicular to the sleeve 3, thereby disengaging from the holder 61.

[0048] See 3- Figure 7As shown, a rubber sleeve 32 into which the emitting part of the laser head 1 can enter is fixedly provided at the lower end of the sleeve 3 , and the pressure-bearing member 64 is arranged between the anti-collision strip 4 and the rubber sleeve 32 .

[0049] Since the pressure-bearing member 64 is disposed between the anti-collision strip 4 and the rubber sleeve 32, when the pressure-bearing member 64 is compressed, the pressure is transmitted to the collar 31. The rubber sleeve 32 prevents the pressure-bearing member 64 from pressurizing the laser head 1, provides a buffer and protection function, and quickly transmits the force to the subsequent trigger structure.

[0050] See also Figure 3-Figure 7 As shown, the pressure-bearing member 64 has a first connecting rod 641 and a second connecting rod 642 hinged to each other, the free end of the first connecting rod 641 is hinged on the rubber sleeve 32, and the free end of the second connecting rod 642 is hinged on the ring 31. When the hinge point between the first connecting rod 641 and the second connecting rod 642 is squeezed by the anti-collision strip 4, the ring 31 is in a state of being pushed upward.

[0051] When the anti-collision strip 4 collides with the welded workpiece or other obstacles, the anti-collision strip 4 transmits force to the pressure piece 64. Specifically, the force of the anti-collision strip 4 first acts on the hinge point between the first link 641 and the second link 642. When the hinge point between the first link 641 and the second link 642 is squeezed by the anti-collision strip 4, the first link 641 and the second link 642 will rotate accordingly. Since the free end of the first link 641 is hinged on the rubber sleeve 32, and the free end of the second link 642 is hinged on the collar 31, the rotation of the first link 641 will cause the second link 642 to push the collar 31 upward.

[0052] As the collar 31 moves upward under the push of the second connecting rod 642, the collar 31 is fixedly connected to the push rod 63, so the push rod 63 also moves upward together with the collar 31. In the process of the push rod 63 moving upward, the force is transmitted to the hook 62. Under the force of the push rod 63, the hook 62 releases the fixation of the holder 61. The transmission of force enables the collar 31 to respond quickly to the collision force and move upward in time, thereby protecting the laser head 1.

[0053] See also Figure 3-Figure 6 As shown, a second compression spring 311 is fixedly connected between the collar 31 and the sleeve 3. When the anti-collision strip 4 does not collide with the welded workpiece, the second compression spring 311 is in a state of not being acted upon by external force.

[0054] When the collision is resolved, the energy stored in the second compression spring 311 is released, pushing the collar 31 downward. The downward movement of the collar 31 drives the top rod 63 and the hook 62 to reset, achieving a reset effect. The holder 61 can be fixed by the hook 62 again, and the laser head 1 returns to the initial extended state, and the cutting operation can continue.

[0055] See also Figure 3-Figure 7 As shown, the two ends of the anti-collision strip 4 extend toward the upper end and the lower end of the sleeve 3 respectively, the upper end of the anti-collision strip 4 is rotatably connected to the sleeve 3, and the sleeve 3 is provided with an axle seat 33 for rotatably connecting the end of the anti-collision strip 4, and the lower half of the anti-collision strip 4 and the side facing the pressure piece 64 are provided with a buffer pad 41 in contact with it.

[0056] When the anti-collision bar 4 is subjected to a collision force, the anti-collision bar 4 can absorb and disperse the collision force by rotating, thereby reducing the impact of the direct impact on the laser head 1. The function of the buffer pad 41 is to further absorb and disperse the collision force, thereby reducing the transmission of force.

[0057] When the anti-collision strip 4 is hit, the buffer pad 41 first contacts and absorbs a part of the force, and then transmits the remaining force to the pressure-bearing member 64. The impact force borne by the pressure-bearing member 64 is greatly reduced, and the structure of the pressure-bearing member 64 is protected.

[0058] See also Figure 3-Figure 6 As shown, a stopper 331 is fixedly provided on the shaft seat 33 and located on the outer side of the anti-collision strip 4 to prevent the anti-collision strip 4 from freely swinging in a direction away from the pressure piece 64 .

[0059] The main function of the stopper 331 is to limit the free swing range of the anti-collision bar 4. In the absence of collision force, the anti-collision bar 4 may swing freely due to slight vibration or other external factors. The existence of the stopper 331 can prevent this from happening and ensure that the anti-collision bar 4 is always in a relatively stable position.

[0060] By limiting the free swing of the anti-collision strip 4, the stopper 331 helps the anti-collision strip 4 to remain in the initial position. This helps to ensure that when the laser head 1 is working normally, the anti-collision strip 4 can respond to the collision in time, provide effective protection and trigger the pressure-bearing member 64 in time. This allows the locking assembly 6 to quickly release the locking state of the laser head 1, so that the laser head 1 is immediately retracted into the sleeve 3 under the force of the elastic connector 5, ensuring the rapid response capability and protection effect of the laser head 1.

[0061] See also Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, the elastic connector 5 has a first return spring 51 and a second return spring 52, which are respectively arranged at the upper and lower halves of the sleeve 3. When the laser head 1 moves upward as a whole into the sleeve 3, the first return spring 51 is in a state of gradually returning to the original state from a compressed state, and the second return spring 52 is in a state of gradually returning to the original state from a stretched state.

[0062] An upper ball 11 and a lower ball 12 are respectively disposed between the upper and lower halves of the sleeve 3 and the laser head 1 to reduce the friction between the laser head 1 and the sleeve 3 .

[0063] When the laser head 1 moves upward into the sleeve 3, the first return spring 51 gradually returns from the compressed state to provide an upward thrust. At the same time, the second return spring 52 gradually returns from the stretched state to provide an upward pulling force. The combined effect of these two forces enables the laser head 1 to quickly enter the sleeve 3, ensuring that the laser head 1 is not affected by collisions.

[0064] A pair of balancing forces is formed by the first return spring 51 and the second return spring 52, which ensures that the laser head 1 can move upward quickly after a collision, avoiding the phenomenon of slow response speed caused by the force of a single spring, so that the laser head 1 can quickly return upward when a collision occurs.

[0065] See also Figure 1-Figure 4 and Figure 8 As shown, the reset mechanism also includes a pusher 7 for pushing the laser head 1 downward when it is working normally so that the emitting part extends out of the sleeve 3.

[0066] The pusher 7 can push the laser head 1 in a variety of ways, and the pusher 7 in the figure has a lower magnetic ring 71 fixedly connected to the holder 61 and an upper magnetic ring 72 fixedly connected to the driving block 2, and the lower magnetic ring 71 and the upper magnetic ring 72 are both electromagnetic rings.

[0067] When the laser head 1 moves upward as a whole so that its emitting part completely enters the sleeve 3, the lower magnetic ring 71 contacts the upper magnetic ring 72, and both are in a non-powered state. When the laser head 1 needs to work normally, the lower magnetic ring 71 and the upper magnetic ring 72 are immediately powered on, and the two generate a mutually repelling force, so that the lower magnetic ring 71 moves relative to the upper magnetic ring 72, thereby causing the laser head 1 to move downward as a whole. After the holder 61 contacts the drive block 2, the emitting part of the laser head 1 completely extends out of the sleeve 3, and the lower magnetic ring 71 and the upper magnetic ring 72 stop being powered. At this time, the holder 61 is fixed to the drive block 2 by the hook 62.

[0068] Through the thrust effect of the pusher 7 on the laser head 1, the laser head 1 can be quickly reset downward, thereby ensuring the stability of the working state of the laser head 1.

[0069] The present invention protects the laser head 1 by the anti-collision strip 4, thereby preventing the laser head 1 from directly contacting the workpiece being welded. When the anti-collision strip 4 contacts the workpiece being welded or other obstacles, the locking assembly 6 quickly releases the constraint on the laser head 1, allowing the laser head 1 to quickly retract into the sleeve 3, thereby avoiding direct hard contact. Compared with the detection of collision by sensors in the prior art, the reaction time is reduced, and the risk of damage to the laser head 1 due to collision is greatly reduced. Not only does it reduce the downtime caused by collision, but it also improves production efficiency, ensuring the continuity and stability of the cutting process of the welded workpiece.

[0070] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An anti-collision resetting device for three-dimensional laser cutting, arranged on a driving mechanism for driving a laser head (1) to move, the driving mechanism having a driving block (2) on which the laser head (1) is arranged; It is characterized in that The anti-collision reset device includes: A sleeve (3) fixedly mounted on the driving block (2) and sleeved with the laser head (1); an anti-collision strip (4) movably arranged around the sleeve (3); and A resetting mechanism for enabling the laser head (1) to be moved upward and retracted as a whole into the sleeve (3) when the anti-collision strip (4) collides with the workpiece being welded; The reset mechanism comprises an elastic connecting member (5) fixedly arranged between the laser head (1) and the sleeve (3), and a locking assembly (6) drivingly connected between each anti-collision strip (4) and the laser head (1); When the anti-collision strip (4) does not collide with the workpiece being welded, the laser head (1) is fixed by the locking assembly (6), and the elastic connecting member (5) is in a state of being acted upon by an external force, so that the emitting portion of the laser head (1) extends out of the sleeve (3) and is in a normal working state; When the anti-collision strip (4) collides with the workpiece being welded, the locking assembly (6) releases the fixation of the laser head (1), and the elastic connecting member (5) is restored to a natural state, so that the emitting portion of the laser head (1) is retracted into the sleeve (3) and is in a protected state; The locking assembly (6) comprises a holder (61) fixedly arranged on the laser head (1) and a hook (62) movably arranged on the driving block (2); the holder (61) has a slot for accommodating the hook (62); the hook (62) can move on the driving block (2) along an axial direction perpendicular to the sleeve (3); a first compression spring (621) is fixedly arranged between the hook (62) and the driving block (2); when the first compression spring (621) is in an uncompressed state, the holder (61) is in a fixed state on the driving block (2) and is restricted by the hook (62); The locking assembly (6) further comprises a trigger structure capable of driving the hook (62) to move outward, the trigger structure comprising a push rod (63) cooperating with the hook (62) and a pressure piece (64) cooperating with the anti-collision strip (4), a sleeve (31) being slidably sleeved on the sleeve (3), the push rod (63) being fixedly connected to the sleeve (31), the pressure piece (64) being movably connected to the sleeve (31), the upper end of the push rod (63) and the lower end of the hook (62) respectively comprising contacting mating surfaces, when the anti-collision strip (4) collides with the welded workpiece and causes the pressure piece (64) to be compressed, the sleeve (31) is in a state of moving upward under the action of the pressure piece (64), and the hook (62) is simultaneously in a state of translating outward under the action of the push rod (63), so that the holder (61) is released from fixation.

2. The anti-collision resetting device for three-dimensional laser cutting according to claim 1, characterized in that: A rubber sleeve (32) capable of allowing the emitting portion of the laser head (1) to enter is fixedly provided at the lower end of the sleeve (3), and the pressure-bearing member (64) is arranged between the anti-collision strip (4) and the rubber sleeve (32).

3. The anti-collision resetting device for three-dimensional laser cutting according to claim 2, characterized in that: The pressure-bearing member (64) comprises a first connecting rod (641) and a second connecting rod (642) which are hinged to each other, the free end of the first connecting rod (641) being hinged to the rubber sleeve (32), and the free end of the second connecting rod (642) being hinged to the collar (31), and when the hinge point between the first connecting rod (641) and the second connecting rod (642) is squeezed by the anti-collision strip (4), the collar (31) is in an upwardly pushed state.

4. The anti-collision resetting device for three-dimensional laser cutting according to claim 3, characterized in that: A second compression spring (311) is fixedly connected between the collar (31) and the sleeve (3); when the anti-collision strip (4) does not collide with the workpiece being welded, the second compression spring (311) is in a state where it is not acted upon by an external force.

5. The anti-collision resetting device for three-dimensional laser cutting according to claim 1, characterized in that: The two ends of the anti-collision strip (4) extend toward the upper end and the lower end of the sleeve (3), respectively. The upper end of the anti-collision strip (4) is rotatably connected to the sleeve (3). The sleeve (3) is provided with a shaft seat (33) for rotatably connecting the end of the anti-collision strip (4). The lower half of the anti-collision strip (4) and the side facing the pressure-bearing piece (64) are provided with a buffer pad (41) in contact with the pressure-bearing piece (64).

6. The anti-collision resetting device for three-dimensional laser cutting according to claim 5, characterized in that: A stopper (331) is fixedly provided on the shaft seat (33) and located outside the anti-collision strip (4) to prevent the anti-collision strip (4) from freely swinging in a direction away from the pressure-bearing member (64).

7. The anti-collision resetting device for three-dimensional laser cutting according to claim 1, characterized in that: The elastic connecting member (5) comprises a first return spring (51) and a second return spring (52), wherein the first return spring (51) and the second return spring (52) are respectively arranged at the upper half and the lower half of the sleeve (3); when the laser head (1) as a whole moves upward and enters the sleeve (3), the first return spring (51) is in a state of gradually returning from a compressed state, and the second return spring (52) is in a state of gradually returning from a stretched state.

8. The anti-collision resetting device for three-dimensional laser cutting according to claim 1, characterized in that: The reset mechanism also includes a pusher (7) for pushing the laser head (1) downward when the laser head (1) is working normally, thereby causing the emitting part to extend out of the sleeve (3).

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