Laser cutting equipment for metal processing

Abstract

The invention discloses laser cutting equipment for metal processing, and relates to the technical field of laser cutting, the laser cutting equipment comprises a rack main body, a sliding table is arranged on the rack main body, a cutting head is arranged in the sliding table, a laser channel assembly is arranged in a cutting head chamber, a shield is arranged at the bottom end of the cutting head, and the bottom end of the cutting head is sunken upwards to form a mounting groove; the adjusting assembly is arranged in the cutting head, gas leakage is reduced as much as possible, the gas spraying range can be controlled, the good slag removal effect is achieved, the linkage effect drives the auxiliary mechanism to adjust the diameter of a movable ring in a nozzle gas channel, the gas spraying range can be controlled, the gas spraying range can be controlled, the slag removal effect is good, and the service life of the cutting head is prolonged. And the gas can be accelerated when passing through the movable ring, so that the efficiency of the cutting head is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and more particularly to a laser cutting device for metal processing. Background Art

[0002] This technology uses a high-energy laser generator to generate a coherent light source of a specific wavelength, and achieves highly concentrated energy through an optical path system consisting of a reflector group and a focusing lens to form a laser beam. When this beam acts on the surface of materials such as metals, its instantaneous thermal effect can make the material reach the melting or vaporization threshold within microseconds. The coaxially injected auxiliary gas removes the slag and promotes the oxidation reaction at the cutting front. The relative displacement of the laser head and the workpiece is precisely controlled by the CNC system, and finally a continuous cut is formed on the material surface.

[0003] The laser cutting machine achieves precise cutting of metal materials through the synergistic effect of high-energy laser beam and auxiliary gas. The core is that the laser head synchronously transports the metal sheet while moving on the preset trajectory, and forms a closed cutting environment through the shield structure. Traditional cutting devices often cause auxiliary gas leakage due to insufficient coordination between the laser channel assembly and the guide table structure, affecting the cutting stability and auxiliary gas utilization rate. At the same time, the gas escape range is uncontrollable and easily causes slag splashing to contaminate the optical components and reduce the quality of the cutting surface. Therefore, a laser cutting device for metal processing is proposed for us. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a laser cutting device for metal processing.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising a frame body, a sliding table is arranged on the frame body, a cutting head is arranged in the sliding table, a laser channel assembly is arranged in the cutting head chamber, a shield is arranged at the bottom end of the cutting head, the bottom end of the cutting head is recessed upward to form an installation groove, a guide table is arranged in the installation groove, a guide hole is arranged in the guide table, an adjustment mechanism for adjusting the size of the guide hole is arranged in the guide table, the adjustment mechanism comprises a driving member arranged on the side wall of the cutting head, a ring member cooperating with the driving member is arranged in the cutting head, an adjustment member is arranged in the guide table, and the driving member and the ring member cooperate to control the adjustment member.

[0006] Preferably, the laser channel assembly includes a laser channel arranged in a cutting head, a fiber laser is arranged at the top of the inner cavity of the laser channel, a nozzle airway is arranged in the cutting head, a movable cavity is formed in the nozzle airway, a movable ring is arranged in the movable cavity, and also includes a cooling cavity arranged in the cutting head, a cooling ring is arranged in the cooling cavity, and the nozzle airway extends downward to form two groups of jet holes, and the two groups of jet holes correspond to the guide holes.

[0007] Preferably, an auxiliary mechanism is also included, which includes a rotating part arranged on the driving part, a sliding part is arranged in the cutting head, the sliding part and the rotating part cooperate with each other, an auxiliary part is arranged in the movable cavity, a resistance part is arranged in the movable cavity, the auxiliary part and the resistance part cooperate with each other, a positioning part is arranged on one side of the resistance part, and the positioning part and the sliding part cooperate with each other.

[0008] Preferably, the driving member includes a fixing groove arranged on the side wall of the cutting head, a motor is arranged in the fixing groove, a driving rod is arranged at the output shaft end of the motor, a gear is arranged on the outer wall of the driving rod, a notch is arranged on one side of the mounting groove, the gear is arranged in the notch, the annular member includes a circular plate, a gear ring is arranged on the outer wall of the circular plate, the gear ring is engaged with the gear, a protrusion is formed downwardly at the center position of the circular plate, a center hole is arranged in the protrusion, the center hole passes through the circular plate, the center hole is connected to the corresponding laser channel, and a plurality of groups of arc grooves are arranged around the outer wall of the protrusion.

[0009] Preferably, the adjusting member comprises two groups of adjusting covers 1 and 2, the adjusting covers 1 and 2 cooperate with each other, the adjusting covers 1 and 2 constitute an adjusting portion, the diameter of one group of adjusting portions is larger than that of the other group, a card groove 1 is circumferentially provided at the bottom end of the guide platform, a locking portion 1 is provided on the inner side of the adjusting cover 1, a positioning strip 1 is provided on one side wall of the locking portion, an insert block portion 1 is provided on the inner side of the adjusting cover 1 away from the locking portion 1, a locking portion 2 is provided on the inner side of the adjusting cover 2, a positioning strip 2 is provided on the side wall of the locking portion 2, and an insert block portion 2 is provided on the inner side of the adjusting cover 2 away from the locking portion 2.

[0010] Preferably, the locking part one cooperates with the insert block part two, the locking part two cooperates with the insert block part one, the corresponding positions of the adjustment cover one and the adjustment cover two are provided with a slot two, the insert block part one and the insert block part two cooperate with the slot two, and the positioning strip one and the positioning strip two are correspondingly slidably connected in the arc groove one.

[0011] Preferably, the rotating member includes an auxiliary plate arranged on the outer wall of the driving rod, the upper end surface of the auxiliary plate is provided with a reducing groove, the reducing groove is composed of a nearest end, a farthest end and a reducing portion, the sliding member includes a slot arranged on one side of the cutting head, the slot is connected to the movable cavity, a limiting slot is provided in the slot, a sliding block is provided in the limiting slot, a linkage plate is provided at the upper end of the sliding block, a limiting block is provided at one end of the linkage plate, and the limiting block is slidably connected in the reducing groove.

[0012] Preferably, the auxiliary part includes an auxiliary ring arranged in the movable cavity, the outer wall of the auxiliary ring is circumferentially provided with a through opening, an auxiliary rod is arranged in the through opening, a compression spring is sleeved on the outer wall of the auxiliary rod, one end of the compression spring is against the outer wall of the auxiliary ring, and one end of the auxiliary rod is against the outer wall of the movable ring.

[0013] Preferably, the resistance member includes a resistance ring arranged in the movable cavity, the outer wall of the resistance ring protrudes outward to form a ring-shaped portion, a torsion spring is sleeved on the outer wall of the resistance ring, one end of the torsion spring is arranged on the top of the inner wall of the movable cavity, the inner wall of the outer wall of the resistance ring is circumferentially provided with a resistance portion, the resistance portion is composed of a resistance surface one and a resistance surface two, the resistance portion cooperates with the auxiliary rod, and an arc groove two is provided on the outer wall of the resistance ring.

[0014] Preferably, the positioning member comprises a positioning plate arranged in the slot, the bottom end of the positioning plate is a wedge-shaped surface, the linkage plate cooperates with the wedge-shaped surface, the side wall of the positioning plate is provided with a positioning rod, and the positioning rod is slidably connected in the second arc groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, an adjusting mechanism is provided in the guide hole, and the driving member and the annular member cooperate to control the adjusting member, so as to adjust the size of the guide hole, and expand the gas coverage area to more comprehensively impact the molten metal and oxide, reduce local residue, and expand the gas flow field to a wider area. The amount of slag adhesion will be greatly reduced, which is suitable for thick plate cutting.

[0017] 2. In the present invention, the gas coverage area is narrowed to concentrate the gas flow energy and increase the local flow rate, thereby accelerating the slag removal and improving the cutting speed, which is suitable for thin plate cutting. The gas consumption is reduced, and the production cost is significantly reduced. The concentrated gas injection can improve the cooling efficiency of the workpiece and reduce heat diffusion.

[0018] 3. In the present invention, a collecting groove is formed between the conical ring and the shield, and the metal generated by the cutting head moves along the inclined surface of the conical ring toward the collecting groove, thereby preventing the splashed residue from falling on the metal plate, causing the residue to stick to the metal plate, and further affecting the subsequent cutting of the metal plate. After the cutting is completed, the shield is removed from the cutting head to remove the metal residue.

[0019] 4. In the present invention, the diameter of the movable ring in the nozzle airway is adjusted by an auxiliary mechanism. At this time, the middle part of the movable ring bends inward, so that the movable ring shrinks from large to small to a narrow throat in the middle, and then expands from small to large after the narrow throat, so that the gas passing through the movable ring will have an acceleration effect. In this way, the device can adjust the gas outlet speed according to the gas removal range, thereby improving the efficiency of the cutting head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention provides a schematic diagram of the overall structure of a laser cutting device for metal processing;

[0021] Figure 2 A schematic diagram of a sliding table of a laser cutting device for metal processing is provided for the present invention;

[0022] Figure 3 A schematic diagram of a cutting head of a laser cutting device for metal processing is provided for the present invention;

[0023] Figure 4 The present invention provides a schematic cross-sectional view of a cutting head of a laser cutting device for metal processing;

[0024] Figure 5 A partial bottom view schematic diagram of a laser cutting device for metal processing proposed by the present invention;

[0025] Figure 6 A schematic diagram of a rotating part of a laser cutting device for metal processing is provided for the present invention;

[0026] Figure 7 This is an enlarged schematic diagram of point A of a laser cutting device for metal processing proposed by the present invention;

[0027] Figure 8 A schematic diagram of an auxiliary mechanism of a laser cutting device for metal processing is provided for the present invention;

[0028] Fig. 9 A schematic diagram of an adjustment member of a laser cutting device for metal processing is provided for the present invention;

[0029] Fig.10 The present invention provides a schematic diagram of the coordination of a ring member and an adjusting member of a laser cutting device for metal processing;

[0030] Fig.11 The present invention provides a schematic diagram of disassembling an adjusting part of a laser cutting device for metal processing.

[0031] In the figure: 100, frame body; 101, sliding table; 102, cutting head; 104, shield; 105, mounting groove; 106, guide table; 107, guide hole; 200, laser channel assembly; 201, laser channel; 204, fiber laser; 205, nozzle airway; 206, movable cavity; 207, movable ring; 208, cooling cavity; 209, cooling ring; 210, jet hole; 300, adjustment mechanism; 301, driving member; 30 2, annular member; 303, adjusting member; 400, auxiliary mechanism; 401, rotating member; 402, sliding member; 403, auxiliary member; 404, resisting member; 405, positioning member; 301a, fixing groove; 301b, motor; 301c, driving rod; 301d, gear; 301e, notch; 302a, circular plate; 302b, gear ring; 302c, protrusion; 302d, center hole; 302e, arc groove 1; 303a, adjusting cover 1; 303b, adjustment cover 2; 303c, adjustment part; 303d, card slot 1; 303e, locking part 1; 303f, positioning strip 1; 303g, plug block part 1; 303h, locking part 2; 303i, positioning strip 2; 303j, plug block part 2; 303k, card slot 2; 401a, auxiliary plate; 401b, variable diameter groove; 401c, nearest end; 401d, farthest end; 401e, variable diameter part; 402a, slot; 402b, limit Positioning groove; 402c, sliding block; 402d, linkage plate; 402e, limiting block; 403a, auxiliary ring; 403b, through port; 403c, auxiliary rod; 403d, compression spring; 404a, resistance ring; 404b, annular portion; 404c, torsion spring; 404d, resistance portion; 404e, resistance surface one; 404f, resistance surface two; 404g, arc groove two; 405a, positioning plate; 405b, wedge surface; 405c, positioning rod. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Embodiment 1 A laser cutting device for metal processing proposed by the present invention is further described, comprising a frame body 100, a sliding table 101 is arranged on the frame body 100, a cutting head 102 is detachably installed in the sliding table 101, a laser channel 201 assembly 200 is arranged in the cutting head 102 chamber, a shield 104 is installed at the bottom end of the cutting head 102 by bolts, a mounting groove 105 is formed by an upward depression at the bottom end of the cutting head 102, a guide table 106 is fixedly connected in the mounting groove 105, a guide hole 107 is arranged in the guide table 106, an adjusting mechanism 300 for adjusting the size of the guide hole 107 is arranged in the guide table 106, the adjusting mechanism 300 comprises a driving member 301 arranged on the side wall of the cutting head 102, a ring member 302 cooperating with the driving member 301 is arranged in the cutting head 102, an adjusting member 303 is arranged in the guide table 106, and the driving member 301 and the ring member 302 cooperate to control the adjusting member 303;

[0036] Depend on Figure 4 It can be seen that the shield 104 is installed on the bottom end of the cutting head 102 by bolts, and a conical ring is integrally formed inside the shield 104. The middle of the conical ring is hollow, and a collecting groove is formed between the conical ring and the shield 104. The debris generated by the cutting head 102 will move along the inclined surface of the conical ring to the collecting groove, thereby preventing the splashed debris from falling on the metal plate, causing the debris to adhere to the metal plate, and then affecting the subsequent cutting of the metal plate. After the cutting is completed, the shield 104 is removed from the cutting head 102 to remove the metal debris in it;

[0037] The laser channel 201 assembly 200 includes a laser channel 201 disposed in the cutting head 102, a fiber laser 204 is fixedly mounted at the top of the inner cavity of the laser channel 201, a nozzle airway 205 is disposed in the cutting head 102, an active cavity 206 is formed in the nozzle airway 205, an active ring 207 is disposed in the active cavity 206, and a cooling cavity 208 is disposed in the cutting head 102, a cooling ring 209 is disposed in the cooling cavity 208, and the nozzle airway 205 extends downward to form two groups of jet holes 210, and the two groups of jet holes 210 correspond to the guide hole 107;

[0038] In the laser cutting process, the key technical link of forming high-quality incisions is to blow away the slag with the aid of high-pressure gas. The high-pressure gas not only assists in removing the molten material, but also participates in the thermodynamic process, directly affecting the cutting speed, incision quality and material adaptability. The gas forms a low-pressure area at the incision, produces an "air knife" effect, peels off the liquid molten pool, and maintains the continuity of the incision. The device further refines the structure of the guide hole 107, and an adjustment mechanism 300 is provided in the guide hole 107, and the driving member 301 and the annular member 302 cooperate to control the adjustment member 303, so as to adjust the size of the guide hole 107;

[0039] The auxiliary mechanism 400 includes a rotating member 401 arranged on the driving member 301, a sliding member 402 is arranged in the cutting head 102, the sliding member 402 cooperates with the rotating member 401, an auxiliary member 403 is arranged in the movable cavity 206, a resisting member 404 is arranged in the movable cavity 206, the auxiliary member 403 cooperates with the resisting member 404, a positioning member 405 is arranged on one side of the resisting member 404, and the positioning member 405 cooperates with the sliding member 402;

[0040] As can be seen from the above, by adjusting the size of the adjustment hole, the gas coverage area can more comprehensively impact the molten metal and oxides, reducing local residues. The device further refines the movable ring 207 by setting an auxiliary mechanism 400 in the adjustment mechanism 300, so that the auxiliary mechanism 400 adjusts the diameter of the movable ring 207 in the nozzle airway 205. At this time, the middle part of the movable ring 207 bends inward, so that the rear half of the movable ring 207 shrinks from large to small toward the middle to a narrow throat, and then expands from small to large and outward after the narrow throat, so that the gas passing through the movable ring 207 has a better acceleration effect;

[0041] Working principle: When in use, the fiber laser 204 in the laser channel 201 ejects laser to cut the metal plate, and the nozzle airway 205 is connected to an external air pump, so that the gas is ejected from the jet hole 210 and sprayed on the metal plate, thereby impacting the molten metal and oxides and reducing local residues. The device is provided with an adjustment component in the cutting head 102, and the adjustment component is provided with mutually cooperating adjustment parts 303c, and the two groups of adjustment parts 303c are rotated with each other through the deflection force of the groove structure, so as to achieve the effect of adjusting the guide hole 107. Such a close fit makes the device not only reduce the leakage of gas as much as possible when in use , and can also control the gas ejection range, which has a better effect on slag removal. In addition, the device is also equipped with an auxiliary mechanism 400 in the adjustment mechanism 300. When adjusting, its linkage effect drives the auxiliary mechanism 400 to adjust the diameter of the movable ring 207 in the nozzle airway 205. At this time, the middle part of the movable ring 207 bends inward, so that the movable ring 207 shrinks from large to small toward the middle to a narrow throat, and then expands from small to large outward after the narrow throat, so that the gas passing through the movable ring 207 will have an acceleration effect. In this way, the device can adjust the gas outlet speed according to the gas removal range, thereby improving the efficiency of the cutting head 102.

[0042] Embodiment 2

[0043] The following technical features are added on the basis of the first embodiment: the driving member 301 includes a fixing groove 301a provided on the side wall of the cutting head 102, a motor 301b is detachably installed in the fixing groove 301a by bolts, a driving rod 301c is fixedly connected to the output shaft end of the motor 301b, a gear 301d is fixedly connected to the outer wall of the driving rod 301c, a notch 301e is provided on one side of the mounting groove 105, the gear 301d is arranged in the notch 301e, and the annular member 301a is provided with a plurality of gears 301d, wherein the gear 301d is provided ... gear 301d is provided in the notch 301e. 02 includes a circular plate 302a, a gear ring 302b is provided on the outer wall of the circular plate 302a, the gear ring 302b is meshed with the gear 301d, a protrusion 302c is formed downward at the center of the circular plate 302a, a center hole 302d is provided in the protrusion 302c, the center hole 302d passes through the circular plate 302a, the center hole 302d is connected to the corresponding laser channel 201, and a plurality of arc grooves 302e are arranged around the outer wall of the protrusion 302c;

[0044] Depend on Figures 3 to 11 It can be seen that a motor 301b is installed on the side wall of the cutting head 102, and the motor 301b is adjusted by an external controller. When the size of the guide hole 107 needs to be adjusted, the motor 301b drives the gear 301d to rotate through the driving rod 301c. Since the gear ring 302b is engaged with the gear 301d, the circular plate 302a at the center is driven to rotate, so the circular plate 302a drives the arc groove 302e on the protruding part 302c to rotate synchronously;

[0045] The adjusting member 303 includes two groups of adjusting covers 1 303a and adjusting covers 2 303b, the adjusting covers 1 303a and the adjusting covers 2 303b cooperate with each other, and the adjusting covers 1 303a and the adjusting covers 2 303b form an adjusting portion 303c, wherein the diameter of one group of adjusting portions 303c is larger than that of the other group, and a card slot 303d is provided in a circumferential manner at the bottom end of the guide platform 106, the inner side of the adjusting cover 1 303a is fixedly connected with a locking portion 1 303e, and the side wall of the locking portion 1 303e is fixedly connected with a positioning strip 1 303f, and the inner side of the adjusting cover 1 303a away from the locking portion 1 303e is fixedly connected with an insert block 1 303g, and the inner side of the adjusting cover 2 303b is fixedly connected with a locking portion 1 303e. A locking part 303h is connected, a positioning strip 303i is fixedly connected to the side wall of the locking part 303h, an inserting block 303j is fixedly connected to the inner end of the adjusting cover 303b away from the locking part 303h, the locking part 1 303e and the inserting block 303j cooperate with each other, the locking part 303h cooperates with the inserting block 1 303g, a card slot 303k is provided at the corresponding positions of the adjusting cover 1 303a and the adjusting cover 2 303b, the inserting block 1 303g and the inserting block 2 303j cooperate with the card slot 303k, and the positioning strip 1 303f and the positioning strip 2 303i are correspondingly slidably connected in the arc groove 1 302e;

[0046] Depend on Figures 9 to 11It can be seen that the adjusting portion 303c is composed of two groups of adjusting portions 303c, and the diameter of one group of adjusting portions 303c is larger than the diameter of the other group, so that the two groups of adjusting portions 303c can be matched, and the smaller diameter is inserted into the larger diameter adjusting portion 303c. The adjusting portion 303c is composed of an arc-shaped adjusting cover 1 303a and an adjusting cover 2 303b, and the adjusting cover 1 303a and the adjusting cover 2 303b rotate with each other, and the adjusting cover 1 303a and the adjusting cover 2 At the position corresponding to 303b, the locking part 1 303e and the plugging part 2 303j cooperate with each other, and the locking part 2 303h cooperates with the plugging part 1 303g, so that the adjustment cover 1 303a and the adjustment cover 2 303b can rotate with each other, and the plugging part 1 303g and the plugging part 2 303j cooperate with the slot 2 303k, and at the same time, the protruding parts 302c of the plugging part 1 303g and the plugging part 2 303j are respectively stuck in the slot 1 303d;

[0047] Since the side wall of the locking part 303h is fixedly connected with the positioning strip 303i, the side wall of the locking part 1 303e is fixedly connected with the positioning strip 303f, and the positioning strip 303f and the positioning strip 303i are correspondingly slidably connected in the arc groove 1 302e, when the circular plate 302a drives the arc groove 1 302e on the protruding part 302c to rotate synchronously, due to the deflection force of the arc groove 1 302e, the positioning strip 1 303f and the positioning strip 2 303i are deflected following the curvature of the arc groove 1 302e, thereby driving the adjustment cover 1 303a and the adjustment cover 2 303b to rotate relative to each other. Figures 5 to 11 It can be seen that the effect of adjusting the size of the guide hole 107 is achieved;

[0048] Working principle: As can be seen from Example 1, the laser is ejected from the fiber laser 204 in the laser channel 201 to cut the metal plate. When metal plates of different thicknesses need to be used, the motor 301b only needs to be started through the external controller. The motor 301b drives the gear 301d to rotate through the driving rod 301c. Since the gear ring 302b is engaged with the gear 301d, the circular plate 302a at the center thereof is driven to rotate. Therefore, the circular plate 302a drives the arc groove 1 302e on the protruding portion 302c to rotate synchronously. Since the side wall of the locking portion 2 303h is fixedly connected with a positioning The second bar 303i and the side wall of the locking portion 1 303e are fixedly connected with a positioning bar 1 303f, and the positioning bar 1 303f and the second positioning bar 303i are correspondingly slidably connected in the arc groove 1 302e. Therefore, when the circular plate 302a drives the arc groove 1 302e on the protruding portion 302c to rotate synchronously, due to the deflection force of the arc groove 1 302e, the positioning bar 1 303f and the second positioning bar 303i are deflected following the curvature of the arc groove 1 302e, thereby driving the adjustment cover 1 303a and the adjustment cover 2 303b to rotate relative to each other, thereby achieving the effect of adjusting the size of the guide hole 107;

[0049] The enlarged area of ​​the guide hole 107 can impact the molten metal and oxide more comprehensively, reduce local residue, and expand the gas flow field to a wider area. The amount of slag adhesion will be greatly reduced, which is especially suitable for thick plate cutting. The reduced gas coverage can concentrate the airflow energy and increase the local flow rate, thereby accelerating the slag removal and improving the cutting speed, which is especially suitable for thin plate cutting. In addition, the gas consumption is reduced, which significantly reduces the production cost. The concentrated gas injection can improve the cooling efficiency of the workpiece and reduce heat diffusion, which has a better effect on the cutting of metal plates.

[0050] Embodiment 3

[0051] The following technical features are added on the basis of the second embodiment: the rotating member 401 includes an auxiliary plate 401a fixedly connected to the outer wall of the driving rod 301c, the upper end surface of the auxiliary plate 401a is provided with a reducing groove 401b, the reducing groove 401b is composed of a nearest end 401c, a farthest end 401d and a reducing portion 401e, the sliding member 402 includes a slot 402a provided on one side of the cutting head 102, the slot 402a is connected to the active cavity 206, a limiting slot 402b is provided in the slot 402a, a sliding block 402c is slidably connected in the limiting slot 402b, a linkage plate 402d is fixedly connected to the upper end surface of the sliding block 402c, one end of the linkage plate 402d is fixedly connected to the limiting block 402e, and the limiting block 402e is slidably connected in the reducing groove 401b;

[0052] Depend on Figures 3 to 8 It can be seen that a circular auxiliary plate 401a is fixedly connected to the outer wall of the driving rod 301c, a reducing groove 401b is formed on the auxiliary plate 401a, and a limiting groove 402b is provided in the slot 402a, a sliding block 402c and a linkage plate 402d are slidably connected in the limiting groove 402b, and a limiting block 402e at the bottom end of the linkage plate 402d moves in the reducing groove 401b. It can be seen from Example 2 that the driving rod 301c drives the auxiliary plate 401a to rotate synchronously, and because the limiting block 402e is stuck in the reducing groove 401b and is fixedly connected to the linkage plate 402d, the linkage plate 402d is linearly moved in the horizontal direction in the slot 402a;

[0053] The auxiliary member 403 includes an auxiliary ring 403a fixedly connected to the movable cavity 206, the outer wall of the auxiliary ring 403a is circumferentially provided with a through hole 403b, and an auxiliary rod 403c is movably connected in the through hole 403b. A compression spring 403d is sleeved on the outer wall of the auxiliary rod 403c. The compression spring 403d is a carbon spring with high strength and is convenient for daily use. One end of the compression spring 403d is against the outer wall of the auxiliary ring 403a, and one end of the auxiliary rod 403c is against the outer wall of the movable ring 207. Figure 8It can be seen that the auxiliary rod 403c is in conflict with the movable ring 207, thereby driving the inner wall diameter of the movable ring 207 to change, and a compression spring 403d is sleeved on the outer wall of the auxiliary rod 403c, so that after the auxiliary rod 403c is no longer subjected to force, the movable ring 207 returns to its original state;

[0054] The abutment 404 comprises an abutment ring 404a rotatably connected to the movable cavity 206 via a bearing, the outer wall of the abutment ring 404a protrudes outward to form an annular portion 404b, a torsion spring 404c is sleeved on the outer wall of the abutment ring 404a, the torsion spring 404c is a carbon spring with high strength, one end of the torsion spring 404c is fixedly connected to the top of the inner wall of the movable cavity 206, the outer wall and inner wall of the abutment ring 404a are circumferentially fixed with an abutment portion 404d, and the abutment portion 404d is composed of an abutment surface 404e and an abutment surface 404e. and a second contact surface 404f, the contact portion 404d cooperates with the auxiliary rod 403c, an arc groove 404g is provided on the outer wall of the contact ring 404a, the positioning member 405 comprises a positioning plate 405a arranged in the slot 402a, the bottom end of the positioning plate 405a is a wedge-shaped surface 405b, the linkage plate 402d cooperates with the wedge-shaped surface 405b, the side wall of the positioning plate 405a is fixedly connected with a positioning rod 405c, and the positioning rod 405c is slidably connected in the second arc groove 404g;

[0055] The movable cavity 206 is rotatably connected with a resistance ring 404a via a torsion spring 404c, and the inner wall of the resistance ring 404a is integrally formed with a resistance portion 404d in a circumferential shape, and the resistance portion 404d cooperates with the auxiliary rod 403c. Therefore, when the resistance ring 404a rotates, the inner resistance portion 404d generates an inward extrusion force on the auxiliary rod 403c, and the auxiliary rod 403c contacts the outer wall of the movable ring 207. Since a positioning plate 405a is slidably connected in the slot 402a, the positioning plate 405a slides in the slot 402a via a T-shaped structure, thereby ensuring the stability of the positioning plate 405a when sliding in the vertical direction. At the same time, the positioning rod 405c on the positioning plate 405a is slidably connected in the arc groove 404g. When the positioning plate 405a drives the positioning rod 405c to move upward, the resistance ring 404a is driven to rotate.

[0056] Working principle: As can be seen from Example 2, the motor 301b drives the gear 301d to rotate through the driving rod 301c, and the driving rod 301c drives the auxiliary plate 401a to rotate synchronously. Since the limit block 402e is stuck in the reducing groove 401b and is fixedly connected with the linkage plate 402d, when the auxiliary plate 401a rotates, the linkage plate 402d moves linearly in the horizontal direction in the slot 402a. At this time, the linkage plate 402d contacts the wedge-shaped surface 405b at the bottom end of the positioning plate 405a, and the wedge-shaped surface 405b is squeezed, thereby driving the positioning plate 405 The positioning rod 405c on a moves in the vertical direction. Since the positioning rod 405c is slidably connected in the arc groove 404g, the resistance ring 404a rotates. When the resistance ring 404a rotates, it drives the resistance part 404d to contact the auxiliary rod 403c. The auxiliary rod 403c squeezes the outer wall of the movable ring 207. At this time, the middle part of the movable ring 207 bends inward, so that the rear half of the movable ring 207 shrinks from large to small to a narrow throat in the middle, and then expands from small to large and outward after the narrow throat, so that the gas passing through the movable ring 207 has a better acceleration effect.

[0057] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A laser cutting device for metal processing, comprising a frame body (100), a sliding table (101) is arranged on the frame body (100), a cutting head (102) is arranged in the sliding table (101), a laser channel assembly (200) is arranged in the cutting head (102), and a shield (104) is arranged at the bottom end of the cutting head (102), characterized in that: The bottom end of the cutting head (102) is recessed upward to form a mounting groove (105), a guide platform (106) is arranged in the mounting groove (105), a guide hole (107) is arranged in the guide platform (106), and an adjustment mechanism (300) for adjusting the size of the guide hole (107) is arranged in the guide platform (106); The adjustment mechanism (300) comprises a driving member (301) arranged on the side wall of the cutting head (102); an annular member (302) cooperating with the driving member (301) is arranged in the cutting head (102); an adjustment member (303) is arranged in the guide platform (106); the driving member (301) and the annular member (302) cooperate to control the adjustment member (303).

2. The laser cutting device for metal processing according to claim 1, characterized in that: The laser channel assembly (200) comprises a laser channel (201) disposed in a cutting head (102), a fiber laser (204) being disposed at the top of the inner cavity of the laser channel (201), a nozzle airway (205) being disposed in the cutting head (102), a movable cavity (206) being formed in the nozzle airway (205), a movable ring (207) being disposed in the movable cavity (206), and a cooling cavity (208) being disposed in the cooling cavity (208), a cooling ring (209) being disposed in the cooling cavity (208), the nozzle airway (205) extending downward to form two groups of jet holes (210), the two groups of jet holes (210) corresponding to the guide holes (107).

3. The laser cutting device for metal processing according to claim 2, characterized in that: The invention also comprises an auxiliary mechanism (400), wherein the auxiliary mechanism (400) comprises a rotating member (401) arranged on the driving member (301), a sliding member (402) is arranged in the cutting head (102), the sliding member (402) and the rotating member (401) cooperate with each other, an auxiliary member (403) is arranged in the movable cavity (206), a resisting member (404) is arranged in the movable cavity (206), the auxiliary member (403) and the resisting member (404) cooperate with each other, a positioning member (405) is arranged on one side of the resisting member (404), and the positioning member (405) and the sliding member (402) cooperate with each other.

4. The laser cutting device for metal processing according to claim 3, characterized in that: The driving member (301) comprises a fixing groove (301a) provided on the side wall of the cutting head (102), a motor (301b) is provided in the fixing groove (301a), a driving rod (301c) is provided at the output shaft end of the motor (301b), a gear (301d) is provided on the outer wall of the driving rod (301c), a notch (301e) is provided on one side of the mounting groove (105), the gear (301d) is provided in the notch (301e), and the annular member (302) comprises a circular plate (302a), A gear ring (302b) is provided on the outer wall of the circular plate (302a), and the gear ring (302b) is meshed with the gear (301d). A protrusion (302c) is formed downward at the center of the circular plate (302a), and a center hole (302d) is provided in the protrusion (302c). The center hole (302d) passes through the circular plate (302a), and the center hole (302d) is connected to the laser channel (201). A plurality of groups of arc grooves (302e) are arranged around the outer wall of the protrusion (302c).

5. The laser cutting device for metal processing according to claim 4, characterized in that: The adjusting member (303) comprises two groups of adjusting covers (303a) and (303b), wherein the adjusting covers (303a) and (303b) cooperate with each other, and the adjusting covers (303a) and (303b) form an adjusting portion (303c), wherein the diameter of the adjusting portion (303c) of one group is larger than that of the other group, and a clamping groove (303d) is provided in a circumferential manner at the bottom end of the guide platform (106), and a locking portion (303d) is provided on the inner side of the adjusting cover (303a). 3e), the locking portion 1 (303e) is provided with a positioning strip 1 (303f) on the side wall, the inner side of the adjusting cover 1 (303a) is provided with an insert block 1 (303g) at one end away from the locking portion 1 (303e), the inner side of the adjusting cover 2 (303b) is provided with a locking portion 2 (303h), the locking portion 2 (303h) is provided with a positioning strip 2 (303i) on the side wall, and the inner side of the adjusting cover 2 (303b) is provided with an insert block 2 (303j) at one end away from the locking portion 2 (303h).

6. The laser cutting device for metal processing according to claim 5, characterized in that: The locking part 1 (303e) and the plug-in part 2 (303j) cooperate with each other, the locking part 2 (303h) cooperates with the plug-in part 1 (303g), the corresponding positions of the adjustment cover 1 (303a) and the adjustment cover 2 (303b) are provided with a card slot 2 (303k), the plug-in part 1 (303g) and the plug-in part 2 (303j) cooperate with the card slot 2 (303k), and the positioning strip 1 (303f) and the positioning strip 2 (303i) are correspondingly slidably connected in the arc groove 1 (302e).

7. The laser cutting device for metal processing according to claim 6, characterized in that: The rotating member (401) includes an auxiliary plate (401a) arranged on the outer wall of the driving rod (301c), and the upper end surface of the auxiliary plate (401a) is provided with a diameter-changing groove (401b), and the diameter-changing groove (401b) is composed of a proximal end (401c), a distal end (401d) and a diameter-changing portion (401e). The sliding member (402) includes a slot (402a) arranged on one side of the cutting head (102), and the slot (402a) is connected to the active cavity (206), a limit groove (402b) is provided in the slot (402a), a sliding block (402c) is provided in the limit groove (402b), a linkage plate (402d) is provided on the upper end surface of the sliding block (402c), a limit block (402e) is provided at one end of the linkage plate (402d), and the limit block (402e) is slidably connected in the variable diameter groove (401b).

8. The laser cutting device for metal processing according to claim 7, characterized in that: The auxiliary component (403) comprises an auxiliary ring (403a) arranged in the movable cavity (206); the outer wall of the auxiliary ring (403a) is circumferentially provided with a through hole (403b); an auxiliary rod (403c) is arranged in the through hole (403b); a compression spring (403d) is sleeved on the outer wall of the auxiliary rod (403c); one end of the compression spring (403d) is against the outer wall of the auxiliary ring (403a); and one end of the auxiliary rod (403c) is against the outer wall of the movable ring (207).

9. The laser cutting device for metal processing according to claim 8, characterized in that: The resistance member (404) comprises a resistance ring (404a) arranged in the movable cavity (206); the outer wall of the resistance ring (404a) protrudes outward to form an annular portion (404b); a torsion spring (404c) is sleeved on the outer wall of the resistance ring (404a); one end of the torsion spring (404c) is arranged on the top of the inner wall of the movable cavity (206); the outer wall and the inner wall of the resistance ring (404a) are circumferentially provided with a resistance portion (404d); the resistance portion (404d) is composed of a resistance surface 1 (404e) and a resistance surface 2 (404f); the resistance portion (404d) cooperates with the auxiliary rod (403c); and an arc groove 2 (404g) is provided on the outer wall of the resistance ring (404a).

10. The laser cutting device for metal processing according to claim 9, characterized in that: The positioning member (405) includes a positioning plate (405a) arranged in the slot (402a), the bottom end of the positioning plate (405a) is a wedge-shaped surface (405b), the linkage plate (402d) cooperates with the wedge-shaped surface (405b), and the side wall of the positioning plate (405a) is provided with a positioning rod (405c), and the positioning rod (405c) is slidably connected in the arc groove 2 (404g).

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