Aviation titanium alloy laser cutting clamp and method

Abstract

The invention relates to the technical field of laser cutting, and discloses an aviation titanium alloy laser cutting clamp and method.The aviation titanium alloy laser cutting clamp comprises a base and further comprises a placing base arranged on the base, a fixing assembly arranged on the base and used for fixing a workpiece, and a cleaning mechanism arranged on the placing base and used for cleaning the workpiece; the cleaning mechanism is arranged on the placing seat and used for cleaning slag in the placing seat, the scraping mechanism is arranged on the cleaning mechanism and used for cleaning the slag on the surface of the placing seat, and the heating mechanism is arranged on the placing seat and used for assisting the cleaning mechanism in cleaning the slag. When the scraping strip moves, the knocking rod is driven to vibrate at high frequency under the action of the waved plate, adhered slag is further crushed through mechanical vibration, a stubborn slag layer which is difficult to treat through traditional manual shoveling and scraping can be removed in cooperation with physical scraping of the scraping strip, it is ensured that no residue exists on the inner wall of the placing base, and the flatness of the positioning face of the clamp is maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, in particular to a fixture and method for laser cutting of aviation titanium alloy. Background Art

[0002] Laser cutting utilizes a focused, high-power density laser beam to illuminate the workpiece, causing the material to rapidly melt, vaporize, ablate, or reach its ignition point. Simultaneously, a high-speed airflow coaxial with the beam is used to blow away the molten material. As the beam moves across the material, the cutting is completed. Laser cutting offers advantages such as high precision, narrow kerfs, smooth surfaces, fast cutting speeds, high efficiency, and non-contact cutting. It can cut a wide variety of materials, including flat surfaces, curved surfaces, and complex shapes. To reduce weight, domestically produced civilian aircraft are also gradually replacing aluminum alloys with titanium alloys.

[0003] According to the Chinese patent publication number "CN113059289B", a laser cutting fixture and method for aviation titanium alloys are disclosed, which include a base plate, at least two fixture locators, and at least two part locators; the base plate is provided with fixture locating holes corresponding to the fixture locators, and the top of the base plate is provided with a profile protrusion for supporting titanium alloy parts, and the profile protrusion is provided with part locating holes corresponding to the part locators. This technical solution can be based on the simple composition structure of the cutting fixture and use cast aluminum as the manufacturing material of the cutting fixture, so that the cutting fixture is light in weight and has good strength and fatigue limit; the profile protrusion is an important structure for supporting the titanium alloy plate. After polishing, it can have a smooth surface structure. Under the condition of supporting the titanium alloy plate, the surface of the profile protrusion will not be deformed, and the surface quality problems such as scratches on the surface of the titanium alloy part are effectively avoided.

[0004] When the above patent is in use, the slag generated during the cutting process falls onto the bottom plate base and needs to be cleaned with a shovel when disassembling the parts. If the slag is not cleaned in time or thoroughly, it may accumulate on the bottom plate base, affecting the subsequent installation of parts and the positioning accuracy of the cutting fixture. Therefore, an aviation titanium alloy laser cutting fixture and method are proposed to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an aviation titanium alloy laser cutting fixture and method in view of the deficiencies in the above-mentioned prior art.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an aviation titanium alloy laser cutting fixture, including a base, and also including: A placement seat is arranged on the base, and a through hole is opened on the top of the placement seat; A fixing component, provided on the base, for fixing the workpiece; A cleaning mechanism is provided on the placement seat and is used to clean the slag inside the placement seat; A scraping mechanism is provided on the cleaning mechanism and is used to clean the slag on the surface of the placement seat; The heating mechanism is arranged on the placement seat and is used to assist the cleaning mechanism in cleaning the slag; The cleanup agencies include: A guide frame is arranged on the inner wall of the placement seat; The motor is mounted on the top of the base; A screw rod, one end of which is fixedly connected to the output end of the motor, and the other end of which passes through the guide frame; Moving block, threaded sleeve is arranged on the screw rod; A scraper bar is connected to the bottom of the moving block, and the scraper bar contacts the bottom of the inner wall of the placement seat; side bars, attached to the top of the scraper bar; a scraper blade, which is arranged on the side rod and contacts the top of the guide frame; The vibration component is arranged on the scraper strip.

[0007] Preferably, the vibration assembly includes a telescopic rod, a mounting plate, a spring, a knocking rod, a moving rod, and a wave plate. The telescopic rod is connected to the top of the scraper bar, the mounting plate is fixed to the top of the telescopic rod, the spring is sleeved on the telescopic rod, and the two ends of the spring are respectively connected to the top of the scraper bar and the bottom of the mounting plate, the knocking rod is fixedly connected to the bottom of the mounting plate, there are two knocking rods, and the two knocking rods are respectively located on both sides of the scraper bar, the moving rod is connected to the side of the mounting plate, the wave plate is fixedly connected to the inner wall of the guide frame, and the bottom of the wave plate is in contact with the moving rod.

[0008] Preferably, the fixing assembly includes a fixing frame, a hydraulic cylinder, and a pressure plate. The fixing frame is connected to the top of the base, the hydraulic cylinder is installed on the fixing frame, and the output end of the hydraulic cylinder passes through the top of the fixing frame. The pressure plate is installed at the bottom of the output end of the hydraulic cylinder.

[0009] Preferably, positioning plates are provided on both sides of the base, positioning holes and jacks are provided on the positioning plates, baffles are provided on the positioning plates, a latch is fixedly connected to the bottom of the baffle, and the latch is slidably connected to the inner wall of the jack.

[0010] Preferably, the scraping mechanism includes a slide groove, a slider, a scraper, a winding drum, a guide wheel, and a connecting rope. The slide groove is opened on both sides of the fixed frame, the slider is slidably connected to the inner wall of the slide groove, the scraper is connected to the slider, and the bottom of the scraper is in contact with the side of the placement seat, the winding drum is arranged on the top of one side of the fixed frame, and the guide wheel is arranged on the bottom of one side of the fixed frame. One end of the connecting rope is sleeved on the winding drum, and the other end of the connecting rope is fixed and passes through the slider and is wrapped around the guide wheel and the screw rod.

[0011] Preferably, there are two winding drums, which are respectively arranged on both sides of the fixing frame. The two winding drums are provided with torsion springs for driving the connecting rope to automatically wind up.

[0012] Preferably, the heating mechanism includes a mounting groove, a resistance wire, a groove, a nickel-titanium shape memory alloy, and a thin film. The mounting groove is opened at the bottom of the placement seat, the resistance wire is arranged inside the mounting groove, the groove is opened at the bottom of the inner wall of the placement seat, the nickel-titanium shape memory alloy is arranged inside the groove, and the thin film is arranged on the top of the nickel-titanium shape memory alloy.

[0013] Preferably, a micron-sized groove is provided on the bottom of the inner wall of the placement seat, and the micron-sized groove is located between the gaps of the mounting grooves.

[0014] Preferably, a discharge trough is provided on the top of the base, a panel is provided on the top of the base, and one end of the screw rod is rotatably connected to the inner wall of the panel.

[0015] A method for using an aviation titanium alloy laser cutting fixture comprises the following steps: Step 1: Fix the base to the laser cutting machine through the positioning holes on the positioning plate, insert the pins on the baffle into the holes, cover the positioning holes, and install the base; Step 2: Place the titanium alloy workpiece on the placement seat, start the hydraulic cylinder to drive the pressing plate to descend, fix the workpiece, and then cut the workpiece with a laser cutting machine; Step 3: After the cutting is completed, the workpiece is removed. The slag generated during the cutting process will fall into the interior of the placement seat through the through-hole on the placement seat. By energizing the resistance wire, the bottom of the placement seat is heated, so that there is a temperature difference between the slag and the placement seat, and the interface generates thermal expansion and contraction stress, which causes the slag to automatically peel off. At the same time, the temperature increase of the placement seat will drive the nickel-titanium shape memory alloy to deform, thereby lifting the film, thereby generating mechanical stress, and further separating the slag from the placement seat; Step 4: Start the motor to drive the screw to rotate, thereby driving the moving block to move. The movement of the moving block will drive the scraper to move, and the slag inside the placement seat will be scraped off. At the same time, the movement of the scraper will drive the mounting plate and the side rod to move. The movement of the side rod will drive the scraper to move, and the slag adhered to the guide frame. The movement of the mounting plate drives the knocking rod to knock on the placement seat under the action of the wave plate, the moving rod and the spring, and the slag is separated from the placement seat by vibration. Step 5. The rotation of the screw will reel in one end of the connecting rope, thereby pulling the slider through the connecting rope to slide downward in the slide groove. The slider will drive the scraper to move downward to scrape off the slag remaining on the side of the placement seat. When the moving block moves to one end of the placement seat, the scraper moves to the bottom. When the motor drives the screw to reverse, the winding drum reels the connecting rope under the action of the torsion spring, thereby driving the scraper to move upward for easy cleaning next time.

[0016] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. This is a fixture and method for laser cutting of aviation titanium alloy. When the scraper bar moves, it drives the knocking rod to vibrate at high frequency under the action of the wave plate, and the mechanical vibration further breaks up the adhered slag. Combined with the physical scraping of the scraper bar, it can remove the stubborn slag layer that is difficult to handle with traditional manual scraping, ensure that there is no residue on the inner wall of the placement seat, and maintain the flatness of the fixture positioning surface.

[0017] 2. This is an aviation titanium alloy laser cutting fixture and method. The present invention uses resistance wire heating to create a temperature difference between the slag and the placement seat, and uses thermal expansion and contraction stress to achieve automatic slag peeling. At the same time, the nickel-titanium shape memory alloy deforms to lift the film to generate mechanical stress. Under the dual action, slag adhesion is reduced, the risk of accumulation is reduced from the source, and positioning errors caused by untimely manual cleaning are avoided.

[0018] 3. This is an aviation titanium alloy laser cutting fixture and method. The present invention synchronously drives the scraper to move up and down along the side of the placement seat through the rotation of the screw rod, and cooperates with the cleaning mechanism to scrape off the internal slag, preventing the slag from accumulating at the edge of the placement seat and then flowing into the positioning hole, eliminating the hidden dangers that affect the positioning accuracy from the structural design.

[0019] 4. This is an aviation titanium alloy laser cutting fixture and method. The micron-level grooves on the inner wall of the placement seat can intensify the interface stress concentration between the slag and the substrate during heating. Combined with the uniform heating of the resistance wire, the slag is easier to peel off along the groove gap during thermal expansion and contraction, reducing interference with subsequent workpiece installation.

[0020] 5. This is a fixture and method for laser cutting of aviation titanium alloy. The present invention realizes a fully automated process of "heat peeling → mechanical scraping → vibration crushing → side cleaning" through the linkage of components such as motors and hydraulic cylinders. There is no need for manual contact with the fixture, which not only avoids the wear of the positioning surface caused by human operation, but also ensures the stability of the fixture accuracy after each cutting through standardized cleaning steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the base of the present invention; Figure 3 It is a schematic diagram of the structure of the present invention; Figure 4 It is a side view of the structure of the present invention; Figure 5 This is a schematic diagram of the placement seat of the present invention; Figure 6 This is a schematic diagram of the cleaning mechanism of the present invention; Figure 7 A schematic diagram of a scraper strip according to the present invention; Figure 8 This is an enlarged schematic diagram of point A of the present invention; Figure 9 This is an enlarged schematic diagram of point B of the present invention; Figure 10 Schematic diagram of the resistance wire of the present invention.

[0022] In the figure: 1. Base; 2. Placement seat; 3. Fixing assembly; 31. Fixing frame; 32. Hydraulic cylinder; 33. Pressing plate; 4. Cleaning mechanism; 41. Guide frame; 42. Motor; 43. Screw; 44. Moving block; 45. Scraping strip; 46. Side rod; 47. Scraping blade; 48. Telescopic rod; 49. Mounting plate; 410. Spring; 411. Knocking rod; 412. Moving rod; 413. Wave plate; 5. Scraping mechanism; 51. Slide; 52. Slider; 53. Scraping blade; 54. Winding drum; 55. Guide wheel; 56. Connecting rope; 6. Heating mechanism; 61. Mounting slot; 62. Resistance wire; 63. Groove; 64. Nickel-titanium shape memory alloy; 65. Thin film; 66. Micron-level groove. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0027] See also Figure 1-10One embodiment of the present invention is: an aviation titanium alloy laser cutting fixture, including a base 1, and also including: a placement seat 2 is arranged on the base 1, and a through hole is opened on the top of the placement seat 2, a fixing component 3 is arranged on the base 1, for fixing the workpiece, a cleaning mechanism 4 is arranged on the placement seat 2, for cleaning the slag inside the placement seat 2, a scraping mechanism 5 is arranged on the cleaning mechanism 4, for cleaning the slag on the surface of the placement seat 2, a heating mechanism 6 is arranged on the placement seat 2, for assisting the cleaning mechanism 4 to clean the slag, wherein the cleaning mechanism 4 includes: a guide frame 41 is arranged on the inner wall of the placement seat 2, a motor 42 is installed on the top of the base 1, one end of the screw rod 43 is fixedly connected to the output end of the motor 42, and the other end of the screw rod 43 is fixedly connected to the output end of the motor 42, and the other end of the screw rod 43 is fixedly connected to the output end of the motor 42. The guide frame 41 is penetrated, and the moving block 44 is threadedly sleeved on the screw rod 43. The scraper 45 is connected to the bottom of the moving block 44, and the scraper 45 contacts the bottom of the inner wall of the placement seat 2. The side rod 46 is connected to the top of the scraper 45. The scraper 47 is arranged on the side rod 46, and the scraper 47 contacts the top of the guide frame 41. The vibration assembly is arranged on the scraper 45. The vibration assembly includes a telescopic rod 48, a mounting plate 49, a spring 410, a knocking rod 411, a moving rod 412, and a wave plate 413. The telescopic rod 48 is connected to the top of the scraper 45, the mounting plate 49 is fixed to the top of the telescopic rod 48, the spring 410 is sleeved on the telescopic rod 48, and the two ends of the spring 410 are respectively connected to the top of the scraper 45 and the bottom of the mounting plate 49, and the knocking rod 411 is fixedly connected At the bottom of the mounting plate 49, there are two knocking rods 411, and the two knocking rods 411 are respectively located on both sides of the scraper 45. The moving rod 412 is connected to the side of the mounting plate 49, and the wave plate 413 is fixedly connected to the inner wall of the guide frame 41, and the bottom of the wave plate 413 is in contact with the moving rod 412. The fixing assembly 3 includes a fixing frame 31, a hydraulic cylinder 32, and a pressing plate 33. The fixing frame 31 is connected to the top of the base 1, the hydraulic cylinder 32 is installed on the fixing frame 31, and the output end of the hydraulic cylinder 32 passes through the top of the fixing frame 31, and the pressing plate 33 is installed at the bottom of the output end of the hydraulic cylinder 32. Positioning plates are provided on both sides of the base 1, and positioning holes and jacks are provided on the positioning plates. A baffle is provided on the positioning plate, and a latch is fixedly connected to the bottom of the baffle, and the latch is connected to the The inner wall of the socket is slidably connected, and the scraping mechanism 5 includes a slide 51, a slider 52, a scraper 53, a winding drum 54, a guide wheel 55, and a connecting rope 56. The slide 51 is opened on both sides of the fixed frame 31, and the slider 52 is slidably connected to the inner wall of the slide 51. The scraper 53 is connected to the slider 52, and the bottom of the scraper 53 contacts the side of the placement seat 2. The winding drum 54 is set at the top of one side of the fixed frame 31, and the guide wheel 55 is set at the bottom of one side of the fixed frame 31. One end of the connecting rope 56 is sleeved on the winding drum 54, and the other end of the connecting rope 56 is fixed through the slider 52 and bypasses the guide wheel 55 and the screw rod 43. There are two winding drums 54, and the two winding drums 54 are respectively set on both sides of the fixed frame 31. The two winding drums 54 are provided with torsion springs.The heating mechanism 6 is used to drive the connecting rope 56 for automatic rewinding. It includes a mounting groove 61, a resistance wire 62, a groove 63, a nickel-titanium shape memory alloy 64, and a film 65. The mounting groove 61 is located at the bottom of the placement seat 2, the resistance wire 62 is arranged inside the mounting groove 61, the groove 63 is located at the bottom of the inner wall of the placement seat 2, the nickel-titanium shape memory alloy 64 is arranged inside the groove 63, and the film 65 is located on top of the nickel-titanium shape memory alloy 64. The bottom of the inner wall of the placement seat 2 is provided with a micron-sized groove 66, and the micron-sized groove 66 is located between the gaps in the mounting groove 61. The top of the base 1 is provided with a discharge chute and a panel. One end of the screw rod 43 is rotatably connected to the inner wall of the panel.

[0028] Working principle: fix the base 1 on the laser cutting machine through the positioning hole on the positioning plate, insert the pin on the baffle into the socket, cover the positioning hole, and realize the installation of the base 1, place the titanium alloy workpiece on the placement seat 2, and start the hydraulic cylinder 32 to drive the pressure plate 33 to descend to fix the workpiece, and then use the laser cutting machine to cut the workpiece. After the cutting is completed, the workpiece is removed. The slag generated during the cutting process will fall into the inside of the placement seat 2 through the through hole on the placement seat 2. The bottom of the placement seat 2 is heated by energizing the resistance wire 62, so that there is a temperature difference between the slag and the placement seat 2, and the interface produces thermal expansion and contraction stress, so that the slag is automatically peeled off. At the same time, the temperature increase of the placement seat 2 will drive the nickel-titanium shape memory alloy 64 to deform, thereby lifting the film 65, thereby generating mechanical stress, and further separating the slag from the placement seat 2. By starting the motor 42, the screw rod 43 is driven to rotate, thereby driving the moving block 44 to move, and the moving block The movement of 44 will drive the scraper 45 to move, and the slag inside the placement seat 2 will be scraped off. At the same time, the movement of the scraper 45 will drive the mounting plate 49 and the side rod 46 to move. The movement of the side rod 46 will drive the scraper 47 to move, and the slag adhered to the guide frame 41 will be scraped off. The movement of the mounting plate 49 will drive the knocking rod 411 to knock on the placement seat 2 under the action of the wave plate 413, the moving rod 412 and the spring 410, and the slag will be separated from the placement seat 2 by vibration. The rotation of the screw 43 will One end of the connecting rope 56 is wound up, thereby pulling the slider 52 to slide downward in the slide groove 51 through the connecting rope 56. The slider 52 will drive the scraper 53 to move downward to scrape off the slag remaining on the side of the placement seat 2. When the moving block 44 moves to one end of the placement seat 2, the scraper 53 moves to the bottom. When the motor 42 drives the screw rod 43 to reverse, the winding drum 54 winds up the connecting rope 56 under the action of the torsion spring, thereby driving the scraper 53 to move upward for easy cleaning next time.

[0029] The present invention provides a fixture and method for laser cutting of aviation titanium alloys. While there are numerous methods and approaches for implementing this technical solution, the foregoing description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Components not specified in this embodiment may be implemented using existing technologies.

Claims

1. An aviation titanium alloy laser cutting fixture, comprising a base (1), characterized in that: Also includes: A placement seat (2) is arranged on the base (1), and a through hole is provided on the top of the placement seat (2); A fixing assembly (3) is arranged on the base (1) and is used to fix the workpiece; A cleaning mechanism (4) is provided on the placement seat (2) and is used to clean the slag inside the placement seat (2); A scraping mechanism (5) is provided on the cleaning mechanism (4) and is used to clean the slag on the surface of the placement seat (2); A heating mechanism (6) is provided on the placement seat (2) and is used to assist the cleaning mechanism (4) in cleaning the slag; The cleaning agencies (4) include: A guide frame (41) is provided on the inner wall of the placement seat (2); A motor (42) is mounted on top of the base (1); A screw rod (43), one end of which is fixedly connected to the output end of the motor (42), and the other end of the screw rod (43) passes through the guide frame (41); A moving block (44) is threadedly sleeved on the screw rod (43); A scraper (45) is connected to the bottom of the moving block (44), and the scraper (45) contacts the bottom of the inner wall of the placement seat (2); A side rod (46) connected to the top of the scraper bar (45); A scraper (47) is provided on the side rod (46), and the scraper (47) contacts the top of the guide frame (41); A vibration assembly is provided on the scraper strip (45).

2. The aviation titanium alloy laser cutting fixture according to claim 1, characterized in that: The vibration assembly includes a telescopic rod (48), a mounting plate (49), a spring (410), a knocking rod (411), a moving rod (412), and a wave plate (413). The telescopic rod (48) is connected to the top of the scraper bar (45), the mounting plate (49) is fixed to the top of the telescopic rod (48), the spring (410) is sleeved on the telescopic rod (48), and the two ends of the spring (410) are respectively connected to the top of the scraper bar (45) and the bottom of the mounting plate (49), the knocking rod (411) is fixedly connected to the bottom of the mounting plate (49), the number of the knocking rods (411) is two, and the two knocking rods (411) are respectively located on both sides of the scraper bar (45), the moving rod (412) is connected to the side of the mounting plate (49), and the wave plate (413) is fixedly connected to the inner wall of the guide frame (41), and the bottom of the wave plate (413) contacts the moving rod (412).

3. The aviation titanium alloy laser cutting fixture according to claim 2, characterized in that: The fixing assembly (3) comprises a fixing frame (31), a hydraulic cylinder (32), and a pressure plate (33). The fixing frame (31) is connected to the top of the base (1). The hydraulic cylinder (32) is mounted on the fixing frame (31), and the output end of the hydraulic cylinder (32) passes through the top of the fixing frame (31). The pressure plate (33) is mounted at the bottom of the output end of the hydraulic cylinder (32).

4. The aviation titanium alloy laser cutting fixture according to claim 3, characterized in that: Positioning plates are provided on both sides of the base (1), positioning holes and insertion holes are provided on the positioning plates, baffles are provided on the positioning plates, a latch is fixedly connected to the bottom of the baffle, and the latch is slidably connected to the inner wall of the insertion hole.

5. The aviation titanium alloy laser cutting fixture according to claim 4, characterized in that: The scraping mechanism (5) includes a chute (51), a slider (52), a scraper (53), a reel (54), a guide wheel (55), and a connecting rope (56). The chute (51) is opened on both sides of the fixed frame (31). The slider (52) is slidably connected to the inner wall of the chute (51). The scraper (53) is connected to the slider (52), and the bottom of the scraper (53) contacts the side of the placement seat (2). The reel (54) is arranged on the top of one side of the fixed frame (31). The guide wheel (55) is arranged on the bottom of one side of the fixed frame (31). One end of the connecting rope (56) is sleeved on the reel (54), and the other end of the connecting rope (56) is fixedly passed through the slider (52) and is wound around the guide wheel (55) and the screw rod (43).

6. The aviation titanium alloy laser cutting fixture according to claim 5, characterized in that: There are two winding drums (54), and the two winding drums (54) are respectively arranged on both sides of the fixing frame (31). Torsion springs are arranged on the two winding drums (54).

7. The aviation titanium alloy laser cutting fixture according to claim 6, characterized in that: The heating mechanism (6) comprises a mounting groove (61), a resistance wire (62), a groove (63), a nickel-titanium shape memory alloy (64), and a film (65); the mounting groove (61) is provided at the bottom of the placement seat (2); the resistance wire (62) is provided inside the mounting groove (61); the groove (63) is provided at the bottom of the inner wall of the placement seat (2); the nickel-titanium shape memory alloy (64) is provided inside the groove (63); and the film (65) is provided on the top of the nickel-titanium shape memory alloy (64).

8. The aviation titanium alloy laser cutting fixture according to claim 7, characterized in that: A micron-sized groove (66) is provided at the bottom of the inner wall of the placement seat (2), and the micron-sized groove (66) is located between the gaps of the mounting groove (61).

9. The aviation titanium alloy laser cutting fixture according to claim 8, characterized in that: A discharge trough is provided on the top of the base (1), and a panel is provided on the top of the base (1). One end of the screw rod (43) is rotatably connected to the inner wall of the panel.

10. The method for using the aviation titanium alloy laser cutting fixture according to claim 9, characterized in that: The following steps are involved: Step 1: Fix the base (1) on the laser cutting machine through the positioning hole on the positioning plate, insert the pin on the baffle into the socket to cover the positioning hole, and install the base (1); Step 2: Place the titanium alloy workpiece on the placement seat (2), start the hydraulic cylinder (32) to drive the pressing plate (33) to descend, fix the workpiece, and then cut the workpiece using a laser cutting machine; Step 3: After the cutting is completed, the workpiece is removed. The slag generated during the cutting process will fall into the interior of the placement seat (2) through the through hole on the placement seat (2). By energizing the resistance wire (62), the bottom of the placement seat (2) is heated, so that there is a temperature difference between the slag and the placement seat (2), and the interface generates thermal expansion and contraction stress, which causes the slag to automatically peel off. At the same time, the temperature increase of the placement seat (2) will drive the nickel-titanium shape memory alloy (64) to deform, thereby lifting the film (65), thereby generating mechanical stress, and further separating the slag from the placement seat (2); Step 4: Start the motor (42) to drive the screw rod (43) to rotate, thereby driving the moving block (44) to move. The movement of the moving block (44) will drive the scraper (45) to move, and the slag inside the placement seat (2) will be scraped off. At the same time, the movement of the scraper (45) will drive the mounting plate (49) and the side rod (46) to move. The movement of the side rod (46) will drive the scraper (47) to move, and the slag adhered to the guide frame (41) will be scraped off. The movement of the mounting plate (49) drives the knocking rod (411) to knock the placement seat (2) under the action of the wave plate (413), the moving rod (412) and the spring (410), and the slag is separated from the placement seat (2) by vibration. Step 5: The screw rod (43) rotates to reel in one end of the connecting rope (56), thereby pulling the slider (52) through the connecting rope (56) to slide downward in the slide groove (51), and the slider (52) drives the scraper (53) to move downward to scrape off the slag remaining on the side of the placement seat (2). When the moving block (44) moves to one end of the placement seat (2), the scraper (53) moves to the bottom. When the motor (42) drives the screw rod (43) to reverse, the reel (54) reels the connecting rope (56) under the action of the torsion spring, thereby driving the scraper (53) to move upward for easy cleaning next time.

Images